阅读说明：本技术 一种角阀及其设计方法 (Angle valve and design method thereof ) 是由 杜大喜 王建强 彭仁杰 陈礼敏 王新成 颜培男 陈晓宇 郑晓东 王阳 于 2021-06-17 设计创作，主要内容包括：本发明提供了一种角阀及其设计方法,包括阀座、阀杆组件、阀体、阀杆导向组件和阀杆导向套组件,阀杆导向组件具有阀杆导向1～6段、或阀杆导向和阀头导向共1～6段,其中阀杆导向设置在阀杆外部,阀头导向设置在阀头外部；阀杆导向套组件通过阀盖法兰固定在阀体中,具有阀杆导向套1～5段、或阀杆导向套和阀头导向套共1～5段,其中阀杆导向套和阀头导向套分别设置在阀杆导向和阀头导向外部,且至少一段阀杆导向与阀杆导向套连为一体,至少一段阀头导向与阀头导向套连为一体,并且基于阀杆结构及运动参数,对导向结构的布置方式及结构参数进行设计。本发明中角阀及其设计方法实现了在高含固量、高压差的工况下,高效、高准确度的平稳动作。(The invention provides an angle valve and a design method thereof, and the angle valve comprises a valve seat, a valve rod assembly, a valve body, a valve rod guide assembly and a valve rod guide sleeve assembly, wherein the valve rod guide assembly is provided with 1-6 sections of valve rod guide or 1-6 sections of valve rod guide and valve head guide, the valve rod guide is arranged outside a valve rod, and the valve head guide is arranged outside a valve head; valve rod uide bushing subassembly passes through the valve gap flange to be fixed in the valve body, 1 ~ 5 sections have valve rod uide bushing, or valve rod uide bushing and valve head uide bushing 1 ~ 5 sections altogether, wherein valve rod uide bushing and valve head uide bushing set up respectively in valve rod direction and valve head direction outside, and at least one section valve rod direction links as an organic wholely with the valve rod uide bushing, at least one section valve head direction links as an organic wholely with the valve head uide bushing, and based on valve rod structure and motion parameter, design guide structure's arrangement and structural parameter. The angle valve and the design method thereof realize stable action with high efficiency and high accuracy under the working conditions of high solid content and high pressure difference.)

1. An angle valve is characterized by comprising a valve seat, a valve rod assembly, a valve body, a valve rod guide assembly and a valve rod guide sleeve assembly, wherein the valve seat is arranged at the lower part of the valve body, and the outer wall of the valve seat is matched with the inner wall of an outlet section of the valve body and is used for guiding a medium out of the valve body; the valve rod assembly comprises a valve rod and a valve head which are connected into a whole, the valve head extends inwards into the valve body, and the flow of the medium at the outlet of the valve body is controlled through the reciprocating linear motion in the valve body; the valve rod guide assembly is provided with 1-6 sections of valve rod guide or 1-6 sections of valve rod guide and valve head guide, wherein the valve rod guide is arranged outside the valve rod, and the valve head guide is arranged outside the valve head and used for guiding the valve rod assembly during reciprocating motion; the valve rod guide sleeve assembly is fixed in the valve body through a valve cover flange and is provided with 1-5 sections of valve rod guide sleeves or 1-5 sections of the valve rod guide sleeves and the valve head guide sleeves, wherein the valve rod guide sleeves and the valve head guide sleeves are respectively sleeved outside the valve rod guide sleeve and the valve head guide sleeve, at least one section of the valve rod guide sleeve is connected with the valve rod guide sleeve into a whole, and at least one section of the valve head guide sleeve is connected with the valve head guide sleeve into a whole when the valve head guide sleeve and the valve head guide sleeve exist;

the maximum diameter of the valve rod is D1, the maximum diameter of the valve head is D2, the outer diameter D1 of the valve rod guide is (1.1-3) D1, the outer diameter D2 of the valve head guide is (1.1-3) D2, the outer diameter D3 of the valve rod guide sleeve is (1.1-3) D1, and the outer diameter D4 of the valve head guide sleeve is (1.1-3) D2; the length H1 of the single-section valve rod guide or the valve head guide in the valve rod guide assembly is 0.2 x d 1-20 x d 1; the length H2 of the single-section valve rod guide sleeve or the valve head guide sleeve in the valve rod guide sleeve assembly is 0.1 x d 1-40 x d 1;

the valve stem assembly stroke to segment relationship comprises: when the stroke M of the valve rod assembly is not more than 1 × d1, the number of the valve rod guides is 1-2 sections, and the number of the valve head guides is 0-1 section; when the stroke of the valve rod assembly is more than 1 × d1 and less than or equal to 2 × d1, the number of the valve rod guides is 2-3 sections, and the number of the valve head guides is 1-2 sections; when the stroke M of the valve rod assembly is larger than 2 × d1, the number of the valve rod guides is 3 or more, and the number of the valve head guides is 1-3;

the valve stem guide sleeve assembly length to segment relationship comprises: when the total length H of the valve rod guide sleeve component is less than or equal to 3 x d1, the number of the valve rod guide sleeves is 1 section, and the number of the valve head guide sleeves is 0 section; when the total length of the valve rod guide sleeve assembly is 3 x d1 and H is not more than 10 x d1, the number of the valve rod guide sleeves is 1-2 sections, and the number of the valve head guide sleeves is 0-1 section; when the total length H of the valve rod guide sleeve assembly is larger than 10 × d1, the number of the valve rod guide sleeves is 2-4 sections, and the number of the valve head guide sleeves is 0-1 section.

2. The angle valve of claim 1, wherein when the stem guide assembly has only a single stem guide, the stem guide sleeve and the stem form a gap in which the single stem guide, the annular compressible material that tightly covers the stem, and a metal hard support ring that is in clearance fit with the stem are installed;

when the valve rod guide assembly comprises two or more valve rod guides, the valve rod guide sleeve assembly and the valve rod form a gap, the valve rod guides, at least one section of annular compressible material and the metal hard support ring for supporting and separating the adjacent valve rod guides are installed, the annular compressible material is tightly coated on the valve rod, and the metal hard support ring is in clearance fit with the valve rod.

3. The angle valve of claim 1, wherein when the valve stem guide assembly has a single valve head guide, the single valve head guide and the metal hard support ring are installed in a gap formed by the valve head guide sleeve and the valve head, the metal hard support ring is in clearance fit with the valve head, and the support of the valve head guide in the gap is implemented by filling the metal hard support ring in the gap formed by the valve head guide sleeve and the valve head; and/or

When the valve rod guide assembly comprises two or more valve heads for guiding, the metal hard support rings for guiding, supporting and separating the adjacent valve heads are arranged in the gap formed by the valve head guide sleeve assembly and the valve heads, and the metal hard support rings are in clearance fit with the valve heads.

4. The angle valve according to claim 1, wherein when the valve stem guide sleeve assembly comprises two or more valve stem guide sleeves, adjacent valve stem guide sleeves are connected in a mechanical manner of threaded connection, welding connection and interference fit processing at a butt joint part, or connected in a manner of a bolt/screw/mortise/spline connection piece, or connected in a manner of simultaneously connecting guide connection blocks at the butt joint part; and/or

When the valve rod guide sleeve assembly comprises at least one valve rod guide sleeve and a valve head guide sleeve, the adjacent valve rod guide sleeve and the valve head guide sleeve are connected in a mechanical mode of threaded section connection, welding connection and interference fit processing at the butt joint part, or are connected in a connecting piece mode of bolts/screws/mortise-tenon joints/splines, or are connected in a mode of simultaneously connecting guide connecting blocks at the butt joint part.

5. The angle valve of claim 1, wherein the screw-in depth is not less than 0.5 x d1 when the valve stem guide sleeve or the valve stem guide sleeve and the valve head guide sleeve are connected by a threaded section processed at the butt joint part; and/or

When the valve rod guide sleeves or the valve rod guide sleeves and the valve head guide sleeves are connected by welding, intermittent welding is not allowed; and/or

When the valve rod guide sleeves or the valve rod guide sleeves and the valve head guide sleeves are connected in an interference fit mechanical mode, the stress of the circumferential surface is not more than 10 MPa; and/or

When the valve rod guide sleeves or the valve rod guide sleeves and the valve head guide sleeves are connected in a bolt/screw/mortise-tenon joint/spline connecting piece mode, the axial pressing force is not lower than 5 MPa; and/or

When the valve rod guide sleeves or the valve rod guide sleeves and the valve head guide sleeves are connected in a mode that the guide connecting blocks are simultaneously connected at the butt joint positions, the inner diameter of each guide connecting block is not less than 2 x d1, and the height of each guide connecting block is 0.2 x d 1-5 x d 1.

6. The angle valve of claim 1, wherein the stem guide assembly has a material hardness less than a material hardness of the stem assembly.

7. The design method of the angle valve is characterized by comprising a valve seat, a valve rod assembly, a valve body, a valve rod guide assembly and a valve rod guide sleeve assembly, wherein the valve seat is arranged at the lower part of the valve body, and the outer wall of the valve seat is matched with the inner wall of an outlet section of the valve body and used for guiding a medium out of the valve body; the valve rod assembly comprises a valve rod and a valve head which are connected into a whole, the valve head extends inwards into the valve body, and the flow of the medium at the outlet of the valve body is controlled through the reciprocating linear motion in the valve body; the design method comprises the following steps:

designing a valve rod guide assembly to enable the valve rod guide assembly to have 1-6 sections of valve rod guide or 1-6 sections of valve rod guide and valve head guide, wherein the valve rod guide is arranged outside a valve rod, and the valve head guide is arranged outside a valve head and used for guiding the valve rod guide assembly during reciprocating motion; fixing a valve rod guide sleeve assembly on a valve body through a valve cover flange, and designing the valve rod guide sleeve assembly to enable the valve rod guide sleeve assembly to have 1-5 sections of a valve rod guide sleeve or 1-5 sections of the valve rod guide sleeve and a valve head guide sleeve, wherein the valve rod guide sleeve and the valve head guide sleeve are respectively sleeved outside a valve rod guide sleeve and a valve head guide sleeve, at least one section of the valve rod guide sleeve is connected with the valve rod guide sleeve into a whole, and at least one section of the valve head guide sleeve is connected with the valve head guide sleeve into a whole when the valve head guide sleeve and the valve head guide sleeve exist;

the maximum diameter of the valve rod is D1, the maximum diameter of the valve head is D2, the outer diameter D1 of the valve rod guide is determined to be (1.1-3) D1, the outer diameter D2 of the valve head guide is determined to be (1.1-3) D2, the outer diameter D3 of the valve rod guide sleeve is determined to be (1.1-3) D1, and the outer diameter D4 of the valve head guide sleeve is determined to be (1.1-3) D2; determining the length H1 of a single-section valve rod guide or a valve head guide in the valve rod guide assembly to be 0.2 x d 1-20 x d1, and the length H2 of a single-section valve rod guide sleeve or a valve head guide sleeve in the valve rod guide sleeve assembly to be 0.1 x d 1-40 x d 1;

determining the relationship of the valve stem assembly stroke and segment: when the stroke M of the valve rod assembly is not more than 1 × d1, the number of the valve rod guides is 1-2 sections, and the number of the valve head guides is 0-1 section; when the stroke of the valve rod assembly is more than 1 × d1 and less than or equal to 2 × d1, the number of the valve rod guides is 2-3 sections, and the number of the valve head guides is 1-2 sections; when the stroke M of the valve rod assembly is larger than 2 × d1, the number of the valve rod guides is 3 or more, and the number of the valve head guides is 1-3;

determining the relationship of the length and the segmentation of the valve stem guide sleeve assembly: when the total length H of the valve rod guide sleeve component is less than or equal to 3 x d1, the number of the valve rod guide sleeves is 1 section, and the number of the valve head guide sleeves is 0 section; when the total length of the valve rod guide sleeve assembly is 3 x d1 and H is not more than 10 x d1, the number of the valve rod guide sleeves is 1-2 sections, and the number of the valve head guide sleeves is 0-1 section; when the total length H of the valve rod guide sleeve assembly is larger than 10 × d1, the number of the valve rod guide sleeves is 2-4 sections, and the number of the valve head guide sleeves is 0-1 section.

8. The design method of claim 1, wherein when the stem guide assembly has only a single stem guide, the annular compressible material and the metal hard support ring are installed in a gap formed by the stem guide sleeve and the stem, the annular compressible material is tightly coated on the stem, and the metal hard support ring is in clearance fit with the stem;

when the valve rod guide assembly comprises two or more valve rod guides, in a gap formed by the valve rod guide sleeve assembly and the valve rod, the valve rod guide assembly is installed, the two or more valve rod guides, at least one section of annular compressible material and the metal hard support ring used for supporting and separating the adjacent valve rod guides are installed, the annular compressible material is tightly coated on the valve rod, and the metal hard support ring is in clearance fit with the valve rod.

9. The design method according to claim 1, wherein when the valve stem guide assembly has a single valve head guide, the single valve head guide and a metal hard support ring are installed in a gap formed by the valve head guide sleeve and the valve head, the metal hard support ring is in clearance fit with the valve head, and the support of the valve head guide in the gap is implemented by filling the metal hard support ring in the gap formed by the valve head guide sleeve and the valve head; and/or

When the valve rod guide assembly comprises two or more valve head guides, the two or more metal hard support rings for guiding, supporting and separating adjacent valve heads are arranged in a gap formed by the valve head guide sleeve assembly and the valve heads, and the metal hard support rings are in clearance fit with the valve heads.

10. The design method according to claim 1, wherein when the valve rod guide sleeve assembly comprises two or more valve rod guide sleeves, adjacent valve rod guide sleeves are connected in a mechanical mode of threaded section connection, welding connection and interference fit processing at a butt joint part, or connected in a mode of a bolt/screw/mortise-tenon joint/spline connecting piece, or connected in a mode of simultaneously connecting guide connecting blocks at the butt joint part; and/or

When the valve rod guide sleeve assembly comprises at least one valve rod guide sleeve and a valve head guide sleeve, the adjacent valve rod guide sleeve and the valve head guide sleeve are connected in a mechanical mode of threaded section connection, welding connection and interference fit processing at the butt joint part, or are connected in a connecting piece mode of bolts/screws/mortise-tenon joints/splines, or are connected in a mode of simultaneously connecting guide connecting blocks at the butt joint part.

11. The design method according to claim 1, characterized in that the screwing depth is determined to be not less than 0.5 x d1 when threaded connection is processed between the valve rod guide sleeves or between the valve rod guide sleeves and the valve head guide sleeves at the butt joint part; and/or

When the valve rod guide sleeves or the valve rod guide sleeves and the valve head guide sleeves are connected by welding, intermittent welding is determined not to be adopted; and/or

When the valve rod guide sleeves or the valve rod guide sleeves and the valve head guide sleeves are connected in an interference fit mechanical mode, the stress of the circumferential surface is determined to be not more than 10 MPa; and/or

When the valve rod guide sleeves or the valve rod guide sleeves and the valve head guide sleeves are connected in a bolt/screw/mortise-tenon joint/spline connecting piece mode, the axial pressing force is determined to be not lower than 5 MPa; and/or

When the valve rod guide sleeves or the valve rod guide sleeves and the valve head guide sleeves are connected in a mode that the guide connecting blocks are simultaneously connected at the butt joint positions, the inner diameter of each guide connecting block is determined to be not less than 2 x d1, and the height of each guide connecting block is 0.2 x d 1-5 x d 1.

Technical Field

The invention belongs to the technical field of valve design, and particularly relates to an angle valve used for working conditions that a medium contains solids, is easy to vibrate and is easy to jam and a design method thereof.

Background

In the industries of petrochemical industry, coal chemical industry, metallurgy, sewage treatment and the like, a control valve in some key process sections is in a working condition of high solid content and even gas-liquid-solid three-phase flow, and particularly under the condition of high pressure difference, the valve is easy to vibrate and jam and the like, so that the valve with a valve rod guide structure needs to be designed. However, the length-diameter ratio of some guide structures is too large, and the processing and assembly are difficult, so that the multi-section valve rod guide structure needs to be designed.

At present, the arrangement mode and structural parameters of the multi-section valve rod guide structure lack the design standard, and even if the multi-section valve rod guide structure is set, the conditions of vibration, jamming and the like also exist due to the unreasonable arrangement mode and structural parameter design of each section of valve rod guide structure, so that the valve rod guide structure can be repeatedly groped and designed and repeatedly tried and mistakenly carried out for many times, the improvement effect on the valve is lack of predictability, and the improvement efficiency is low.

Disclosure of Invention

The invention aims to solve the technical problem of providing an angle valve and a design method thereof, wherein the arrangement mode and the structural parameters of a guide structure are designed based on the structure and the motion parameters of a valve rod, so that the stable action of the valve and the prevention of vibration or jamming are realized efficiently and accurately under the working conditions of high solid content and high pressure difference.

The technical scheme provided by the invention is as follows:

in a first aspect, the angle valve comprises a valve seat, a valve rod assembly, a valve body, a valve rod guide assembly and a valve rod guide sleeve assembly, wherein the valve seat is arranged at the lower part of the valve body, and the outer wall of the valve seat is matched with the inner wall of an outlet section of the valve body and used for guiding a medium out of the valve body; the valve rod assembly comprises a valve rod and a valve head which are connected into a whole, the valve head extends inwards into the valve body, and the flow of the medium at the outlet of the valve body is controlled through the reciprocating linear motion in the valve body; the valve rod guide assembly is provided with 1-6 sections of valve rod guide or 1-6 sections of valve rod guide and valve head guide, wherein the valve rod guide is arranged outside the valve rod, and the valve head guide is arranged outside the valve head and used for guiding the valve rod assembly during reciprocating motion; the valve rod guide sleeve assembly is fixed in the valve body through a valve cover flange and is provided with 1-5 sections of valve rod guide sleeves or 1-5 sections of the valve rod guide sleeves and the valve head guide sleeves, wherein the valve rod guide sleeves and the valve head guide sleeves are respectively sleeved outside the valve rod guide sleeve and the valve head guide sleeve, at least one section of the valve rod guide sleeve is connected with the valve rod guide sleeve into a whole, and at least one section of the valve head guide sleeve is connected with the valve head guide sleeve into a whole when the valve head guide sleeve and the valve head guide sleeve exist;

the maximum diameter of the valve rod is D1, the maximum diameter of the valve head is D2, the outer diameter D1 of the valve rod guide is (1.1-3) D1, the outer diameter D2 of the valve head guide is (1.1-3) D2, the outer diameter D3 of the valve rod guide sleeve is (1.1-3) D1, and the outer diameter D4 of the valve head guide sleeve is (1.1-3) D2; the length H1 of the single-section valve rod guide or the valve head guide in the valve rod guide assembly is 0.2 x d 1-20 x d 1; the length H2 of the single-segment valve rod guide sleeve or the valve head guide sleeve in the valve rod guide sleeve assembly is 0.1 x d 1-40 x d 1.

The valve stem assembly stroke to segment relationship comprises: when the stroke M of the valve rod assembly is not more than 1 × d1, the number of the valve rod guides is 1-2 sections, and the number of the valve head guides is 0-1 section; when the stroke of the valve rod assembly is more than 1 × d1 and less than or equal to 2 × d1, the number of the valve rod guides is 2-3 sections, and the number of the valve head guides is 1-2 sections; when the stroke M of the valve rod assembly is larger than 2 x d1, the number of the valve rod guides is 3 sections or more, and the number of the valve head guides is 1-3 sections.

The valve stem guide sleeve assembly length to segment relationship comprises: when the total length H of the valve rod guide sleeve component is less than or equal to 3 x d1, the number of the valve rod guide sleeves is 1 section, and the number of the valve head guide sleeves is 0 section; when the total length of the valve rod guide sleeve assembly is 3 x d1 and H is not more than 10 x d1, the number of the valve rod guide sleeves is 1-2 sections, and the number of the valve head guide sleeves is 0-1 section; when the total length H of the valve rod guide sleeve assembly is larger than 10 × d1, the number of the valve rod guide sleeves is 2-4 sections, and the number of the valve head guide sleeves is 0-1 section.

In a second aspect, the angle valve comprises a valve seat, a valve rod assembly, a valve body, a valve rod guide assembly and a valve rod guide sleeve assembly, wherein the valve seat is arranged at the lower part of the valve body, and the outer wall of the valve seat is matched with the inner wall of an outlet section of the valve body and is used for guiding a medium out of the valve body; the valve rod assembly comprises a valve rod and a valve head which are connected into a whole, the valve head extends inwards into the valve body, and the medium flow at the outlet of the valve body is controlled through the reciprocating linear motion in the valve body; the design method comprises the following steps:

designing a valve rod guide assembly to enable the valve rod guide assembly to have 1-6 sections of valve rod guide or 1-6 sections of valve rod guide and valve head guide, wherein the valve rod guide is arranged outside a valve rod, and the valve head guide is arranged outside a valve head and used for guiding the valve rod guide assembly when the valve rod guide assembly reciprocates; fixing a valve rod guide sleeve assembly on a valve body through a valve cover flange, and designing the valve rod guide sleeve assembly to enable the valve rod guide sleeve assembly to have 1-5 sections of a valve rod guide sleeve or 1-5 sections of the valve rod guide sleeve and a valve head guide sleeve, wherein the valve rod guide sleeve and the valve head guide sleeve are respectively sleeved outside a valve rod guide sleeve and a valve head guide sleeve, at least one section of the valve rod guide sleeve is connected with the valve rod guide sleeve into a whole, and at least one section of the valve head guide sleeve is connected with the valve head guide sleeve into a whole when the valve head guide sleeve and the valve head guide sleeve exist;

the maximum diameter of the valve rod is D1, the maximum diameter of the valve head is D2, the outer diameter D1 of the valve rod guide is determined to be (1.1-3) D1, the outer diameter D2 of the valve head guide is determined to be (1.1-3) D2, the outer diameter D3 of the valve rod guide sleeve is determined to be (1.1-3) D1, and the outer diameter D4 of the valve head guide sleeve is determined to be (1.1-3) D2; the length H1 of the single-section valve rod guide or the valve head guide in the valve rod guide assembly is 0.2 x d 1-20 x d 1; the length H2 of the single-segment valve rod guide sleeve or the valve head guide sleeve in the valve rod guide sleeve assembly is 0.1 x d 1-40 x d 1.

Determining the relationship of the valve stem assembly stroke and segment: when the stroke M of the valve rod assembly is not more than 1 × d1, the number of the valve rod guides is 1-2 sections, and the number of the valve head guides is 0-1 section; when the stroke of the valve rod assembly is more than 1 × d1 and less than or equal to 2 × d1, the number of the valve rod guides is 2-3 sections, and the number of the valve head guides is 1-2 sections; when the stroke M of the valve rod assembly is larger than 2 × d1, the number of the valve rod guides is 3 or more, and the number of the valve head guides is 1-3;

determining the relationship of the length and the segmentation of the valve stem guide sleeve assembly: when the total length H of the valve rod guide sleeve component is less than or equal to 3 x d1, the number of the valve rod guide sleeves is 1 section, and the number of the valve head guide sleeves is 0 section; when the total length of the valve rod guide sleeve assembly is 3 x d1 and H is not more than 10 x d1, the number of the valve rod guide sleeves is 1-2 sections, and the number of the valve head guide sleeves is 0-1 section; when the total length H of the valve rod guide sleeve assembly is larger than 10 × d1, the number of the valve rod guide sleeves is 2-4 sections, and the number of the valve head guide sleeves is 0-1 section.

According to the angle valve and the design method thereof provided by the invention, the angle valve has the following beneficial effects:

according to the angle valve and the design method thereof, the arrangement mode and the structural parameters of the guide structure are designed based on the valve rod structure and the motion parameters, and the stable action and the vibration or jamming prevention of the valve are realized with high efficiency and high accuracy under the working conditions of high solid content and high pressure difference.

Drawings

FIG. 1 is a schematic diagram of a multi-stage valve stem guide structure having a two-stage valve stem guide assembly and a two-stage valve stem guide sleeve assembly;

FIG. 2 is a schematic diagram of a multi-section valve stem guide structure having a three-section valve stem guide assembly and a two-section valve stem guide sleeve assembly;

FIG. 3 is a schematic view of a multi-section valve stem guide structure having a three-section valve stem guide assembly and a three-section valve stem guide sleeve assembly;

FIG. 4 is a schematic view of a guide sleeve I and a guide sleeve II connected by welding;

FIG. 5 is a schematic view of the connection of the guide sleeve I and the guide sleeve II through threads;

FIG. 6 is a schematic view of a guide sleeve I and a guide sleeve II connected by a spline, the left view is a longitudinal sectional view, and the right view is a transverse sectional view A-A;

FIG. 7 is a schematic view of the guide sleeve I and the guide sleeve II being connected by end compression;

FIG. 8 is a schematic view of the connection of the guide sleeve I and the guide sleeve III by screw threads;

FIG. 9 is a schematic view of the connection of the guide sleeve I and the guide sleeve III by end compression;

FIG. 10 is a schematic view of a guide sleeve I and a guide sleeve III connected by splines, the left view being a longitudinal sectional view and the right view being a transverse sectional view B-B;

FIG. 11 is a schematic view of the connection of the guide sleeve I and the guide sleeve II with the guide connecting block;

fig. 12 is a schematic diagram of a connection mode of a valve rod guide and a valve rod guide sleeve, the left drawing is a welding connection mode, the middle drawing is a combination of a threaded connection mode and a welding connection mode, and the right drawing is a combination of a gap or transition or interference fit mode and an end portion pressing connection mode.

Description of the reference numerals

1-a valve seat; 2-a valve stem assembly; 3-a valve body; 4-valve rod guide I; 5-valve rod guide II; 6-valve rod guide sleeve I; 7-valve rod guide sleeve II; 8-valve head guide I; 9-valve head guide sleeve I; 10-a guide connecting block; 11-an annularly compressible material; 12-metal hard support ring.

Detailed Description

The features and advantages of the present invention will become more apparent and appreciated from the following detailed description of the invention.

The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

According to a first aspect of the present invention, an angle valve is provided, as shown in fig. 1 to 3, including a valve seat 1, a valve stem assembly 2, a valve body 3, a valve stem guide assembly and a valve stem guide sleeve assembly, where the valve seat 1 is disposed at a lower portion of the valve body 3, and an outer wall of the valve seat is matched with an inner wall of an outlet section of the valve body 3, so as to guide a medium out of the valve body 3; the valve rod component 2 comprises a valve rod and a valve head which are connected into a whole, the valve head extends inwards into the valve body 3, and the outlet medium flow of the valve body is controlled through the reciprocating linear motion of the valve rod component 2 in the valve body 3; the valve rod guide assembly is provided with 1-6 sections of valve rod guide or 1-6 sections of valve rod guide and valve head guide, wherein the valve rod guide is arranged outside the valve rod, and the valve head guide is arranged outside the valve head and used for guiding the valve rod assembly 2 during reciprocating motion; the valve rod guide sleeve assembly is fixed in the valve body 3 through a valve cover flange and is provided with 1-5 sections of a valve rod guide sleeve or 1-5 sections of the valve rod guide sleeve and a valve head guide sleeve, wherein the valve rod guide sleeve and the valve head guide sleeve are respectively sleeved outside the valve rod guide sleeve and the valve head guide sleeve, at least one section of the valve rod guide sleeve is connected with the valve rod guide sleeve into a whole, and at least one section of the valve head guide sleeve is connected with the valve head guide sleeve into a whole when the valve head guide sleeve and the valve head guide sleeve exist, so that the relative position of the valve rod guide assembly on the valve body 3 is maintained;

the maximum diameter of the valve rod is D1, the maximum diameter of the valve head is D2, the outer diameter D1 of the valve rod guide is (1.1-3) D1, the outer diameter D2 of the valve head guide is (1.1-3) D2, the outer diameter D3 of the valve rod guide sleeve is (1.1-3) D1, and the outer diameter D4 of the valve head guide sleeve is (1.1-3) D2; the length H1 of the single-section valve rod guide or the valve head guide in the valve rod guide assembly is 0.2 x d 1-20 x d 1; the length H2 of the single-section valve rod guide sleeve or the valve head guide sleeve in the valve rod guide sleeve assembly is 0.1 x d 1-40 x d 1;

the valve stem assembly stroke to segment relationship comprises: when the stroke M of the valve rod assembly 2 is not more than 1 × d1, the number of the valve rod guides is 1-2 sections, and the number of the valve head guides is 0-1 section; when the stroke of the valve rod assembly 2 is 1 × d1 and M is not less than 2 × d1, the number of the valve rod guides is 2-3 sections, and the number of the valve head guides is 1-2 sections; when the stroke M of the valve rod assembly 2 is greater than 2 × d1, the number of the valve rod guides is 3 or more, and the number of the valve head guides is 1 to 3, as shown in table 1;

TABLE 1 relationship of valve stem assembly travel to segment

Travel of valve stem assembly	Number of valve stem guides	Number of valve head guides
			M≤1*d1	1 to 2 stages	0 to 1 stage
1*d1＜M≤2*d1	2 to 3 stages	1 to 2 stages
			M＞2*d1	3 stages and above	1 to 3 paragraphs

The valve stem guide sleeve assembly length to segment relationship comprises: when the total length H of the valve rod guide sleeve component is less than or equal to 3 x d1, the number of the valve rod guide sleeves is 1 section, and the number of the valve head guide sleeves is 0 section; when the total length of the valve rod guide sleeve assembly is 3 x d1 and H is not more than 10 x d1, the number of the valve rod guide sleeves is 1-2 sections, and the number of the valve head guide sleeves is 0-1 section; when the total length H of the valve rod guide sleeve assembly is more than 10 × d1, the number of the valve rod guide sleeves is 2-4 sections, and the number of the valve head guide sleeves is 0-1 section, as shown in Table 2.

TABLE 2 relationship of valve stem guide sleeve assembly length to segment

Total length of guide sleeve assembly	Number of valve stem guide sleeves	Number of valve head guide sleeves
			H≤3*d1	1 paragraph	Section 0
3*d1＜H≤10*d1	1 to 2 stages	0 to 1 stage
			H＞10*d1	2 to 4 stages	0 to 1 stage

The inventor finds that the multi-section valve rod guide structure can firmly reduce the vibration and the jamming of the valve and the like in production. However, the arrangement mode and the structural parameters of the multi-section valve rod guide structure lack the design standard, that is, the multi-section valve rod guide structure is set, under the condition of high-pressure and high-solid-content fluid, the conditions of vibration, jamming and the like also exist due to the unreasonable arrangement mode and structural parameters of each section of valve rod guide structure, the valve rod guide structure needs to be repeatedly searched and designed and repeatedly tried and error, the improvement effect of the valve is lack of predictability, and the improvement efficiency is low. The present inventors have determined the results of the above tables 1 and 2 through a number of studies and repeated verifications. For table 1: for valve rods with different strokes M, the problems of vibration, deformation, incapability of ensuring coaxiality and the like can be caused when no guide is arranged; set up the too much valve rod that can lead to of direction quantity and cross the location, when direction quantity increases, in order to guarantee the geometric shape and position tolerance between the different directions, can promote the degree of difficulty of product manufacturing by a wide margin. Therefore, the distribution results in the table were obtained by trial and error.

For table 2: the ratio span of the total length H of the stem guide sleeve assembly to the maximum stem outer diameter d1 is large, subject to factors such as valve body size, valve travel, etc. The ratio of H to d1 determines the processing difficulty of the guide sleeve on one hand, such as form and position tolerance control of cylindricity and the like; on the other hand has also influenced the location assembly degree of difficulty between valve rod, the valve rod direction subassembly, has further influenced the performance of valve rod. The distribution results in the table are obtained by repeated groping.

Through table 1 and table 2, the stroke and the uide bushing subassembly total length of combination valve rod subassembly can confirm the quantity of valve rod direction, valve head direction, valve rod uide bushing and valve head uide bushing.

In a preferred embodiment, the length H1 of the single-stage valve stem guide or valve head guide in the valve stem guide assembly is 0.2 × d 1-20 × d1, preferably H1 × 1 × d 1-10 × d 1. In the above range, particularly 1 × d1 to 10 × d1, the valve stem assembly 2 is linearly reciprocated over 500 times without jamming.

In a preferred embodiment, the length H2 of the single-segment valve stem guide sleeve or valve head guide sleeve in the valve stem guide sleeve assembly is 0.1 × d 1-40 × d1, preferably H2 ═ 1 × d 1-10 × d 1. In particular, the range is 1 × d1 to 10 × d 1. The length of the single segment in the valve rod guide assembly and the valve rod guide sleeve assembly is too short to be lower than the range, and the single segment cannot play a guiding role, if the length of the single segment exceeds the range, the over-positioning between the valve rod and the valve rod guide and the over-positioning between the valve rod guide and the valve rod guide sleeve can be caused, particularly in the working condition containing solid particles, the gaps between the valve rod and the valve rod guide valve and between the valve rod guide and the valve rod guide sleeve can cause the scratching of the valve rod as long as a small amount of solid particles enter, even the situation of incapability of action is caused, and the service life of the valve rod guide assembly and the valve rod guide sleeve is seriously influenced.

In a preferred embodiment, when the stem guide assembly has only a single stem guide, for example, the stem guide II 5 is located on the upper portion of the stem, the single stem guide, the annular compressible material and the metal hard support ring are installed in the gap formed by the stem guide sleeve and the stem, the annular compressible material is tightly coated on the stem, the metal hard support ring is in clearance fit with the stem, and through the filling of the annular compressible material and the metal hard support ring in the gap formed by the stem guide sleeve and the stem, not only can the support of the stem guide be implemented, but also the leakage of the fluid medium from the stem can be prevented.

As shown in fig. 1, when the stem guide assembly includes two or more stem guides, such as a stem guide I4 located in the middle of the stem and a stem guide II 5 located on the upper portion of the stem, the two or more stem guides, at least one segment of annular compressible material 11, and a metal hard support ring 12 for supporting and separating the adjacent stem guides are installed in a gap formed by the stem guide sleeve assembly and the stem, the annular compressible material is tightly coated on the stem, and the metal hard support ring is in clearance fit with the stem.

In a preferred embodiment, as shown in fig. 2, when the valve stem guide assembly has a single valve head guide such as the valve head guide I8 located at the upper part of the valve head, the single valve head guide and the metal hard support ring are installed in the gap formed by the valve head guide sleeve and the valve head, the metal hard support ring is in clearance fit with the valve head, and the support of the valve head guide in the gap is implemented by the filling of the metal hard support ring in the gap formed by the valve head guide sleeve and the valve head.

When the valve rod guide assembly comprises two or more valve heads for guiding, the metal hard support rings for guiding, supporting and separating the adjacent valve heads are arranged in the gap formed by the valve head guide sleeve assembly and the valve heads, and the metal hard support rings are in clearance fit with the valve heads.

In a preferred embodiment, when the valve stem guide sleeve assembly comprises two or more valve stem guide sleeves, such as the valve stem guide sleeve I6 and the valve stem guide sleeve II 7 located on the valve stem portion, the adjacent valve stem guide sleeves are connected by mechanical forms such as threaded connection (fig. 5), welded connection (fig. 4), interference fit and the like at the butt joint portion, or connected by connecting pieces such as bolts/screws/mortise and tenon joints/splines (fig. 6)/end compression (fig. 7) and the like, or connected by simultaneously connecting the guide connecting blocks 10 at the butt joint portion (fig. 11).

When the valve rod guide sleeve assembly comprises at least one valve rod guide sleeve and one valve head guide sleeve, if the valve rod guide sleeve I6 positioned on the valve rod part and the valve head guide sleeve I9 positioned on the valve head part are located, the adjacent valve rod guide sleeve and the adjacent valve head guide sleeve are connected in mechanical forms such as threaded connection (figure 8), welding connection, interference fit and the like through butt joint parts, or are connected in connecting piece forms such as bolt/screw/mortise and tenon joint/spline (figure 10)/end pressing (figure 9) and the like, or are connected in a mode of simultaneously connecting guide connecting blocks at the butt joint parts.

When the threaded section is processed at the butt joint part for connection, the screwing depth is not less than 0.5 x d 1;

when welding connection is adopted, intermittent welding is not allowed to be adopted;

when the valve rod guide sleeve/valve head guide sleeve is connected in a mechanical mode such as interference fit, the stress of the circumferential surface is not more than 10MPa, and if the stress exceeds the threshold, the phenomenon of serious deformation caused by concentrated thermal stress exists at the connecting part of the valve rod guide sleeve/valve head guide sleeve under the use working conditions such as high temperature and the like, so that the use performance is influenced;

when the connection is carried out by adopting the connecting piece forms such as bolt/screw/mortise and tenon joint/spline/end part compression and the like, the axial pressing force is not lower than 5MPa, the condition that the structure is loosened due to insufficient pressing force under the working conditions such as high temperature, vibration and the like is prevented, solid-containing media are introduced due to increased clearance, and the connecting part is broken;

when the guide connecting blocks are connected at the butt joint positions simultaneously, the inner diameter of each guide connecting block is not less than 2 x d1, and the height of each guide connecting block is 0.2 x d 1-5 x d 1.

In a preferred embodiment, the valve rod guide and the valve rod guide sleeve or the valve head guide and the valve head guide sleeve are connected through a butt joint part by machining a threaded section, welding, interference fit and other mechanical forms, or are connected through a bolt/screw/mortise-tenon joint/spline/end pressing and other connecting pieces, or are connected into a whole through a mode of simultaneously connecting guide connecting blocks at the butt joint part and a combination of the modes. Fig. 12 shows a welding connection mode on the left, a combination of a threaded connection and a welding connection mode in fig. 12, and a combination of a gap or transition or interference fit and an end pressing connection mode on the right in fig. 12.

When the threaded section is processed at the butt joint part for connection, the screwing depth is not less than 0.5 x d 1;

when welding connection is adopted, intermittent welding is not allowed to be adopted;

when the connection is performed in a mechanical form such as interference fit, the stress of the circumferential surface is not more than 10 MPa;

when the connection is realized by adopting the connecting pieces such as bolts, screws, mortise and tenon joints, splines, end part compression and the like, the axial pressing force is not lower than 5 MPa;

when the guide connecting blocks are connected at the butt joint positions simultaneously, the inner diameter of each guide connecting block is not less than 2 x d1, and the height of each guide connecting block is 0.2 x d 1-5 x d 1.

Preferably, as shown in fig. 3, the valve of the present invention comprises a valve seat, a valve stem assembly, a valve body, a three-segment valve stem guide assembly and a three-segment valve stem guide sleeve assembly; the valve rod guide assembly comprises a valve rod guide I, a valve rod guide II and a valve head guide I, and the valve rod guide sleeve assembly comprises a valve rod guide sleeve I, a valve rod guide sleeve II and a valve head guide sleeve I; when the maximum diameter of the valve rod is D1, the maximum diameter of the valve head is D2 and the stroke M of the valve rod assembly 2 is more than 2 x D1, the outer diameter D1 of the valve rod guide I-II is 1.75 x D1, and the outer diameter D2 of the valve head guide I is 1.5 x D2; the outer diameter D3 of the valve rod guide sleeves I-II is 2X D1, and the outer diameter D4 of the valve head guide sleeve I is 1.2X D2; the valve rod guide length I H11 is 3 × d1, the valve rod guide length II H12 is 2 × d1, and the valve head guide length I H13 is 3 × d 1; the length of the valve rod guide sleeve I is H21-6 × d1, the length of the valve rod guide sleeve II is H22-3 × d1, and the length of the valve head guide sleeve I is H23-10 × d 1; the valve rod guide sleeve I and the valve rod guide sleeve II are connected through threads and welding, and the screwing depth of the threads is 1.2 x d 1; the valve rod guide sleeve II and the valve head guide sleeve I are connected through splines and welding, the splines are 8 teeth which are uniformly distributed, and the splines are welded after being matched; the valve rod guide I is connected with the valve rod guide sleeve I in a clearance fit mode, and the annular surface stress is less than 5 MPa; the valve rod guide II is connected with the valve rod guide sleeve II in an interference fit manner, and the circumferential surface stress is less than 8 MPa; the valve head guide I is connected with the valve head guide sleeve I in an integrated manner.

In a preferred embodiment, the material hardness of the valve rod guide assembly is less than that of the valve rod assembly, so that the surface of the valve rod assembly is prevented from being damaged, a larger gap exists between the valve rod assembly and the valve rod guide assembly, and phenomena such as jamming and the like are caused after solid media enter the gap.

According to a second aspect of the invention, a design method of an angle valve is provided, the angle valve comprises a valve seat 1, a valve rod assembly 2, a valve body 3, a valve rod guide assembly and a valve rod guide sleeve assembly, the valve seat 1 is arranged at the lower part of the valve body 3, and the outer wall of the valve seat is matched with the inner wall of an outlet section of the valve body 3 and used for guiding a medium out of the valve body 3; the valve rod component 2 comprises a valve rod and a valve head which are connected into a whole, the valve head extends inwards into the valve body 3, and the outlet medium flow of the valve body is controlled through the reciprocating linear motion of the valve rod component 2 in the valve body 3; the design method comprises the following steps:

the valve rod guide assembly is designed to have 1-6 sections of valve rod guide or 1-6 sections of valve rod guide and valve head guide, wherein the valve rod guide is arranged outside the valve rod, and the valve head guide is arranged outside the valve head and used for guiding the valve rod assembly 2 during reciprocating motion; fixing a valve rod guide sleeve assembly on a valve body 3 through a valve cover flange, and designing the valve rod guide sleeve assembly to enable the valve rod guide sleeve assembly to have 1-5 sections of valve rod guide sleeves or 1-5 sections of the valve rod guide sleeves and the valve head guide sleeves, wherein the valve rod guide sleeves and the valve head guide sleeves are respectively sleeved on the valve rod guide part and the valve head guide part, at least one section of valve rod guide sleeve is connected with the valve rod guide sleeve into a whole, and at least one section of valve head guide sleeve is connected with the valve head guide sleeve into a whole when the valve head guide sleeve and the valve head guide sleeve exist, so that the relative position of the valve rod guide assembly on the valve body 3 is maintained;

the maximum diameter of the valve rod is D1, the maximum diameter of the valve head is D2, the outer diameter D1 of the valve rod guide is determined to be (1.1-3) D1, the outer diameter D2 of the valve head guide is determined to be (1.1-3) D2, the outer diameter D3 of the valve rod guide sleeve is determined to be (1.1-3) D1, the outer diameter D4 of the valve head guide sleeve is determined to be (1.1-3) D2, the length H1 of the single-segment valve rod guide or the valve head guide in the valve rod guide assembly is determined to be 0.2D 1-20D 1, and the length H2 of the single-segment valve rod guide sleeve or the valve head guide sleeve in the valve rod guide sleeve assembly is determined to be 0.1D 1-40D 1;

determining the relationship of the valve stem assembly stroke and segment: when the stroke M of the valve rod assembly 2 is not more than 1 × d1, the number of the valve rod guides is 1-2 sections, and the number of the valve head guides is 0-1 section; when the stroke of the valve rod assembly 2 is 1 × d1 and M is not less than 2 × d1, the number of the valve rod guides is 2-3 sections, and the number of the valve head guides is 1-2 sections; when the stroke M of the valve rod assembly 2 is more than 2 × d1, the number of the valve rod guides is 3 or more, and the number of the valve head guides is 1-3;

determining the relationship of the length and the segmentation of the valve stem guide sleeve assembly: when the total length H of the valve rod guide sleeve component is less than or equal to 3 x d1, the number of the valve rod guide sleeves is 1 section, and the number of the valve head guide sleeves is 0 section; when the total length of the valve rod guide sleeve assembly is 3 x d1 and H is not more than 10 x d1, the number of the valve rod guide sleeves is 1-2 sections, and the number of the valve head guide sleeves is 0-1 section; when the total length H of the valve rod guide sleeve assembly is larger than 10 × d1, the number of the valve rod guide sleeves is 2-4 sections, and the number of the valve head guide sleeves is 0-1 section.

In the design method of the invention, the length of the single-stage valve rod guide or the valve head guide in the valve rod guide assembly is preferably H1-1-d 1-10-d 1.

In the design method of the invention, the length of the single-section valve rod guide sleeve or the valve head guide sleeve in the valve rod guide sleeve assembly is preferably H2-1 × d 1-10 × d 1.

In the design method, when the valve rod guide assembly only has a single valve rod guide, such as a valve rod guide II 5 positioned at the upper part of a valve rod, the single valve rod guide, the annular compressible material and the metal hard support ring are arranged in a gap formed by the valve rod guide sleeve and the valve rod, the annular compressible material is tightly coated on the valve rod, the metal hard support ring is in clearance fit with the valve rod, and the annular compressible material and the metal hard support ring are filled in the gap formed by the valve rod guide sleeve and the valve rod, so that the valve rod guide can be supported, and the leakage of a fluid medium from the valve rod can be prevented.

As shown in fig. 1, when the stem guide assembly includes two or more stem guides, such as a stem guide I4 located in the middle of the stem and a stem guide II 5 located on the upper portion of the stem, in the gap formed by the stem guide sleeve assembly and the stem, the two or more stem guides, at least one segment of annular compressible material 11, and a metal hard support ring 12 for supporting and separating the adjacent stem guides are installed, the annular compressible material is tightly coated on the stem, and the metal hard support ring is in clearance fit with the stem.

In the design method of the invention, as shown in fig. 2, when the valve stem guide assembly is provided with a single valve head guide such as a valve head guide I8 positioned at the upper part of the valve head, the single valve head guide and a metal hard support ring are arranged in a gap formed by a valve head guide sleeve and the valve head, the metal hard support ring is in clearance fit with the valve head, and the support of the valve head guide in the gap is implemented by filling the metal hard support ring in the gap formed by the valve head guide sleeve and the valve head.

When the valve rod guide assembly comprises two or more valve head guides, the two or more metal hard support rings for guiding, supporting and separating adjacent valve heads are arranged in a gap formed by the valve head guide sleeve assembly and the valve heads, and the metal hard support rings are in clearance fit with the valve heads.

In the design method, when the valve rod guide sleeve assembly comprises two or more valve rod guide sleeves such as a valve rod guide sleeve I6 and a valve rod guide sleeve II 7 which are positioned on a valve rod part, adjacent valve rod guide sleeves are connected in a mechanical mode of threaded section connection, welding connection, interference fit and the like at butt joint positions, or are connected in a connecting piece mode of bolts/screws/mortise and tenon joints/splines/end part pressing and the like, or are connected in a mode of simultaneously connecting guide connecting blocks at the butt joint positions.

When the valve rod guide sleeve assembly comprises at least one valve rod guide sleeve and one valve head guide sleeve, if the valve rod guide sleeve I6 positioned on the valve rod part and the valve head guide sleeve I9 positioned on the valve head part are located, the adjacent valve rod guide sleeve and the adjacent valve head guide sleeve are connected in a mechanical mode such as threaded connection, welding connection, interference fit and the like through butt joint parts, or are connected in a connecting piece mode such as bolt/screw/mortise and tenon joint/spline/end pressing and the like, or are connected in a mode of simultaneously connecting guide connecting blocks at the butt joint parts.

When the threaded section connection is processed at the butt joint part, the screwing depth is determined to be not less than 0.5 x d 1;

when welding connection is adopted, intermittent welding is determined not to be adopted;

when mechanical connection in interference fit and the like is adopted, the stress of the circumferential surface is determined to be not more than 10MPa, and if the stress exceeds the threshold value, the phenomenon of serious deformation caused by thermal stress concentration exists at the connecting part of the valve rod guide sleeve/the valve head guide sleeve under the use working conditions of high temperature and the like, so that the use performance is influenced;

when the connection is carried out by adopting the connecting piece forms of bolt/screw/mortise/spline/end part compression and the like, the axial compression force is determined to be not lower than 5MPa, the condition that the structure is loosened due to insufficient compression force under the working conditions of high temperature, vibration and the like is prevented, solid-containing media are introduced due to increased clearance, and the connecting part is broken;

when the connection is carried out by simultaneously connecting the guide connecting blocks at the butt joint positions, the inner diameter of each guide connecting block is determined to be not less than 2 x d1, and the height is determined to be 0.2 x d 1-5 x d 1.

In the design method, the valve rod guide is connected with the valve rod guide sleeve or the valve head guide is connected with the valve head guide sleeve through mechanical forms such as butt joint part processing threaded section connection, welding connection, interference fit and the like, or is connected by adopting connecting pieces such as bolts, screws, mortise and tenon joints, splines, end part compression and the like, or is connected into a whole by adopting a mode of simultaneously connecting guide connecting blocks at the butt joint part and the combination of the modes.

When the threaded section connection is processed at the butt joint part, the screwing depth is determined to be not less than 0.5 x d 1;

when welding connection is adopted, intermittent welding is determined not to be adopted;

when the connection is performed in a mechanical form such as interference fit, the stress of the circumferential surface is determined to be not more than 10 MPa;

when the connection is realized by adopting connecting pieces such as bolts, screws, mortise and tenon joints, splines, end part compression and the like, the axial compression force is determined to be not lower than 5 MPa;

when the connection is carried out by simultaneously connecting the guide connecting blocks at the butt joint positions, the inner diameter of each guide connecting block is determined to be not less than 2 x d1, and the height is determined to be 0.2 x d 1-5 x d 1.

In the design method of the invention, the hardness of the material of the valve rod guide assembly is less than that of the material of the valve rod assembly.

Examples

Example 1

As shown in fig. 2, the valve includes a valve seat, a valve stem assembly, a valve body, a three-stage valve stem guide assembly and a two-stage valve stem guide sleeve assembly; the valve rod guide assembly comprises a valve rod guide I4, a valve rod guide II 5 and a valve head guide I8, and the valve rod guide sleeve assembly comprises a valve rod guide sleeve I6 and a valve head guide sleeve I9; when the maximum diameter of the valve stem is D1(40mm), the maximum diameter of the valve head is D2(80mm), and the stroke M > 2 × D1(90mm) of the valve stem assembly 2, the outer diameter D1 of the valve stem guides I to II is 1.75 × D1(70mm), the outer diameter D2 of the valve head guide I is 1.5 × D2(120mm), the outer diameter D3 of the valve stem guide sleeve I is 2 × D1(140mm), and the outer diameter D4 of the valve head guide sleeve I is 1.2 × D2(144 mm). Valve stem guide length H11-3 × d1(120mm), valve stem guide length II 12-2 × d1(80mm), and valve head guide length I13-3 × d1(120 mm); the length of the valve rod guide sleeve I is H21 ═ 10 × d1(400mm), and the length of the valve head guide sleeve I23 is 10 × d1(400 mm); the valve rod guide sleeve I and the valve head guide sleeve I are connected through threads and welding, and the screwing depth of the threads is 1.2d1 (48 mm); the valve rod guide I is connected with the valve rod guide sleeve I in an interference fit manner, and the circumferential surface stress is less than 5 MPa; the valve rod guide II is connected with the valve rod guide sleeve I in an interference fit manner, and the circumferential surface stress is less than 6 MPa; the valve head guide I is connected with the valve head guide sleeve I in an integrated manner.

At normal temperature, the valve no-load action test is carried out for 500 times, and the phenomenon of jamming does not occur; in the slurry solution filled with the solid content of 5%, the valve action test is carried out for 500 times, and the phenomenon of jamming does not occur.

Example 2

As shown in fig. 3, the valve includes a valve seat, a valve stem assembly, a valve body, a three-stage valve stem guide assembly, and a three-stage valve stem guide sleeve assembly; the valve rod guide assembly comprises a valve rod guide I, a valve rod guide II and a valve head guide I, and the valve rod guide sleeve assembly comprises a valve rod guide sleeve I, a valve rod guide sleeve II and a valve head guide sleeve I; when the maximum diameter of the valve rod is D1(40mm), the maximum diameter of the valve head is D2(80mm) and the stroke M of the valve rod assembly 2 is more than 2 x D1(90mm), the outer diameter D1 of the valve rod guides I-II is 1.75 x D1(70mm), and the outer diameter D2 of the valve head guide I is 1.5 x D2(120 mm); the outer diameter D3 of the valve stem guide sleeves I to II is 2 × D1(140mm), and the outer diameter D4 of the valve head guide sleeve I is 1.2 × D2(144 mm). The valve rod guide length I H11 is 3 × d1, the valve rod guide length II H12 is 2 × d1, and the valve head guide length I H13 is 3 × d 1; the length of the valve rod guide sleeve I is H21-6 × d1, the length of the valve rod guide sleeve II is H22-3 × d1, and the length of the valve head guide sleeve I is H23-10 × d 1; the valve rod guide sleeve I and the valve rod guide sleeve II are connected through threads and welding, and the screwing depth of the threads is 1.2 x d 1; the valve rod guide sleeve II and the valve head guide sleeve I are connected through splines and welding, the splines are 8 teeth which are uniformly distributed, and the splines are welded after being matched; the valve rod guide I is connected with the valve rod guide sleeve I in an interference fit manner, and the circumferential surface stress is less than 5 MPa; the valve rod guide II is connected with the valve rod guide sleeve II in an interference fit manner, and the circumferential surface stress is less than 6 MPa; the valve head guide I is connected with the valve head guide sleeve I in an integrated manner.

At normal temperature, the valve no-load action test is carried out for 500 times, and the phenomenon of jamming does not occur; in the slurry solution filled with the solid content of 5%, the valve action test is carried out for 500 times, and the phenomenon of jamming does not occur.

The invention has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to be construed in a limiting sense. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made in the technical solution of the present invention and the embodiments thereof without departing from the spirit and scope of the present invention, which fall within the scope of the present invention. The scope of the invention is defined by the appended claims.

Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.