阅读说明：本技术 一种基于阀芯形变的阀门及管路 (Valve and pipeline based on case deformation ) 是由 马延春 于 2020-06-11 设计创作，主要内容包括：本公开提供一种基于阀芯形变的阀门及管路,涉及管路元件领域,包括带有内腔的阀体,内腔内设有内部填充有介质的内胎,阀体上设有连通内腔的进口和出口,内胎在介质作用下膨胀并贴合内腔内壁阻隔进口和出口,或内胎收缩使进口和出口通过内腔连通,通过采用可变刚度可涨缩变形的空间三维阀芯与刚度相对较大的阀体内腔所形成的空间三维阀座实现阀芯阀座之间三维压缩接触的方式实现阀门的密封性和开关动作。将现有阀门的阀芯阀座之间的一维相互作用力改为三维相互压力,具有密封性好,开关灵活省力,零部件受力条件好,制造成本低,自增压密封,可靠性高,寿命长等特点。(The utility model provides a valve and pipeline based on case deformation, relate to the pipeline component field, including the valve body that has the inner chamber, the intracavity is equipped with the inner tube that the inside packing has the medium, be equipped with import and the export of intercommunication inner chamber on the valve body, the inner tube expands and laminates inner chamber inner wall separation import and export under the medium effect, or the inner tube shrink makes import and export communicate through the inner chamber, three-dimensional compression contact's mode realization valve between the case disk seat is realized to the three-dimensional disk seat of space that the three-dimensional case that warp and the valve body inner chamber that rigidity is great relatively formed through adopting variable rigidity harmomegathus. The valve has the advantages that the one-dimensional interaction force between the valve core and the valve seat of the existing valve is changed into three-dimensional interaction pressure, and the valve has the characteristics of good sealing performance, flexible and labor-saving opening and closing, good stress condition of parts, low manufacturing cost, self-pressurization sealing, high reliability, long service life and the like.)

1. The valve based on the deformation of the valve core is characterized by comprising a valve body with an inner cavity, wherein an inner tube filled with a medium is arranged in the inner cavity, an inlet and an outlet which are communicated with the inner cavity are formed in the valve body, the inner tube expands under the action of the medium and is attached to the inner wall of the inner cavity to block the inlet and the outlet, or the inner tube contracts to enable the inlet and the outlet to be communicated through the inner cavity.

2. A valve core deformation-based valve according to claim 1, wherein the medium makes the inner tube expand or contract gradually under the action of the driving mechanism, and is used for being attached to or detached from the inner wall of the inner cavity gradually.

3. The valve based on valve core deformation according to claim 2, wherein the driving mechanism is a driving member, the driving member is matched with the valve body, one end of the driving member is positioned in the inner tube, and the driving member is used for changing the volume of the driving member positioned in the inner tube under the action of external force;

or the driving mechanism is a medium supply mechanism which is communicated with the inner tube and used for conveying the medium into the inner tube or extracting the medium from the inner tube.

4. The valve core deformation based valve according to claim 1, wherein the inner tube is attached around the inner wall of the inner cavity around the inlet and the outlet when the inner tube blocks the inlet and the outlet.

5. The valve based on deformation of valve core according to claim 1, wherein one end of the inner tube is connected with the inner wall of the inner cavity to form a fixed end, and the inner tube is gradually attached to the inner wall of the inner cavity along the direction from the fixed end to the other end under the action of medium.

6. A valve core deformation-based valve according to claim 1, wherein the medium is a liquid, a gas or a powder solid having fluidity.

7. The valve based on valve core deformation according to claim 1, wherein a plugging piece corresponding to the inlet and/or the outlet is arranged between the inner tube and the inner wall of the inner cavity, and the plugging piece plugs or opens the corresponding inlet and/or the corresponding outlet along with the action of the inner tube.

8. A valve core deformation-based valve according to claim 1, wherein the inner tube is of an elastic structure and is elastically deformed by a medium.

9. A valve core deformation-based valve according to claim 1, wherein the inlet and the outlet are oppositely arranged and are respectively arranged on two sides of the valve body.

10. A pipeline comprising a valve based on deformation of a spool according to any of claims 1-9.

Technical Field

The utility model relates to a pipeline component field, in particular to valve and pipeline based on case deformation.

Background

The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

During the design, processing and operation of the valve, there are many contradictory problems, such as: the soft material is selected, so that the fitting performance can be improved, and the sealing performance is improved, but the external load stress mode of one-dimensional compression of the valve seat of the existing valve core is easy to damage the soft material and destroy the sealing performance, and the common soft material is not resistant to high temperature and high pressure; the hard material is selected, the sealing surface is not easy to deform, the fitting performance can be improved only by precise processing, the sealing performance is ensured, the manufacturing cost is high, and the maintenance cost is high. The sealing performance can be improved by large sealing surface contact pressure, but the plastic damage can be caused to the sealing surface at the same time, so that the sealing performance is reduced, the length of the sealing surface can be reduced by a small flow area, the sealing performance is improved, the flow resistance can be increased, and the abrasion of the sealing surface is increased. The flushing of the fluid and the impurities in the fluid can also damage the sealing surface, influence the service life of the valve and increase the operation and maintenance cost.

The inventor finds that for some occasions with strict requirements and harsh operating conditions, in order to further improve the sealing performance of the valve rod, on the basis of the existing packing seal, a corrugated pipe sealing structure is additionally arranged, so that the problem of external seal of the valve can be well solved, the problems of high manufacturing cost, large occupied space, complex structure and the like of the stainless steel corrugated pipe seal exist, and the problem of internal seal of the valve still exists; the existing valve is sealed in a manner that two matched sealing surfaces are contacted, compressed and deformed to be attached so as to prevent fluid from passing through, and the valve is low in reliability due to the fact that a sealing method is problematic, is difficult to avoid the problems of leakage, leakage and leakage in the use process, is high in operation and maintenance cost and has potential safety and environmental protection hazards.

Disclosure of Invention

The purpose of the disclosure is to provide a valve and a pipeline based on valve core deformation aiming at the defects in the prior art, and the sealing and opening and closing actions of the valve are realized by adopting a mode that a spatial three-dimensional valve core with variable rigidity and expandable and contractible deformation and a spatial three-dimensional valve seat formed by a valve body inner cavity with relatively larger rigidity realize three-dimensional compression contact between valve core and valve seat. The valve has the advantages that the one-dimensional interaction force between the valve core and the valve seat of the existing valve is changed into three-dimensional interaction pressure, and the valve has the characteristics of good sealing performance, flexible and labor-saving opening and closing, good stress condition of parts, low manufacturing cost, self-pressurization sealing, high reliability, long service life and the like.

The first purpose of the present disclosure is to provide a valve based on valve core deformation, which adopts the following technical scheme:

the inner tube expands under the action of the medium and is attached to the inner wall of the inner cavity to block the inlet and the outlet, or the inner tube contracts to enable the inlet and the outlet to be communicated through the inner cavity.

Further, the medium enables the inner tube to gradually expand or gradually contract under the action of the driving mechanism, and the medium is used for gradually attaching to and covering the inner wall of the inner cavity or gradually separating from the inner wall of the inner cavity.

Furthermore, the driving mechanism is a driving piece, the driving piece is matched with the valve body, one end of the driving piece is positioned in the inner tube, and the driving piece is used for changing the volume of the driving piece positioned in the inner tube under the action of external force;

or the driving mechanism is a medium supply mechanism which is communicated with the inner tube and used for conveying the medium into the inner tube or extracting the medium from the inner tube.

Further, when the inner tube obstructs the inlet and the outlet, the inner tube is attached to the inner wall of the inner cavity around the inlet and the outlet in a surrounding mode.

Further, inner tube one end forms the stiff end with the cavity inner wall connection, and the inner tube is laminated the cavity inner wall gradually along stiff end to the direction of the other end under the medium effect.

Further, the medium is a liquid, gas or powder solid having fluidity; graphite powder is preferred.

Furthermore, a plugging piece corresponding to the inlet and/or the outlet is arranged between the inner tube and the inner wall of the inner cavity, and the plugging piece plugs or opens the corresponding inlet and/or outlet along with the action of the inner tube.

Furthermore, the inner tube is of an elastic structure and is elastically deformed under the action of a medium.

Further, the inlet and the outlet are arranged opposite to each other and are respectively arranged on two sides of the valve body.

A second object of the present disclosure is to provide a pipeline, on which the valve based on deformation of the valve core as described above is installed.

Compared with the prior art, the utility model has the advantages and positive effects that:

(1) the elastic inner tube is matched with the inner cavity of the valve body, and the inner tube is gradually expanded to be attached to the inner wall of the inner cavity through the medium, so that the rigidity is low before the inner tube is completely attached, the shape change between the surface of the inner cavity and the shape change between the valve cores can be adapted, and the inner tube can be closely attached when impurities exist. After the sealing surfaces are completely attached, the valve core continues to expand, and is limited by the volume of the inner chamber, the valve core is subjected to three-dimensional compression, the rigidity of the valve core is sharply increased, the contact compression stress is increased, the plurality of sealing surfaces form a spatial three-dimensional sealing surface, and the sealing performance of the valve core is improved;

(2) through the fitting of the inner tube and the inner cavity of the valve body, the pressure of the sealing surface can be increased by the fluid at the outlet and the inlet, the liquid can not enter into and pass through the sealing surface in a large amount, the sealing surface has a self-pressurization effect, and the sealing property is greatly improved;

(3) the driving work of the driving medium acts on the sealing surface, the material rigidity under the three-dimensional compression constraint far exceeds the one-dimensional compression rigidity, the deformation is small, the driving work can also be used for filling and leveling the local depression of the sealing surface, the problem that the deformation near the valve core and valve seat contact surface in the one-dimensional direction of the traditional valve is effective work is solved, and the utilization rate of the sealing function of the driving mechanism is improved;

(4) the powdery solid is used as a filling medium, so that the lubricating property and the fluidity are good, the resistance during deformation is favorably reduced, the stress is reduced, and the uniform filling and the smooth shrinkage are favorably realized; the graphite powder has good thermal conductivity, is beneficial to reducing the thermal stress of the stainless steel inner tube and improving the heat resistance; the graphite powder has stable physical and chemical properties, is not easy to leak, is nontoxic and harmless, and has low price; compared with the existing stainless steel corrugated pipe sealing valve, the inner cavity of the inner tube made of heat-resistant stainless steel is filled with graphite powder with high temperature resistance and good heat conductivity, so that the valve has good stress condition and good heat transfer condition, and is beneficial to improving the working reliability and prolonging the service life of the valve.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.

Fig. 1 is a schematic overall structural view of a valve open state in embodiment 1 of the present disclosure;

fig. 2 is an overall configuration diagram of a valve-closed state in embodiment 1 of the present disclosure;

fig. 3 is an overall structural diagram of a valve-closed state in embodiment 7 of the present disclosure.

In the figure: 1. the valve comprises a valve rod, 10, a transmission screw rod, 11, a fixed end, 12, an inner tube, 13, filler, 14, a column sealing surface, 15, a dynamic sealing surface, 2, a valve body, 20, an inlet, 21, an inlet valve seat, 22, an inner cavity sealing surface, 23, an outlet valve seat, 24, an outlet, 25, a fluid channel, 26, a valve cover, 27, a valve core end connecting surface, 28, a conversion connecting device, 29 and a conventional valve core.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;

for convenience of description, the words "up", "down", "left" and "right" in this disclosure, if any, merely indicate that the directions of movement are consistent with those of the figures themselves, and are not limiting in structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present disclosure.

As described in the background art, the sealing manner of the valve in the prior art is to contact, press, deform and fit two mating sealing surfaces to prevent fluid from passing through, and the reliability of the valve is low due to the problem of the sealing manner; to the above-mentioned problem, this disclosure provides a valve and pipeline based on case deformation.

The existing valve inner seal is characterized in that the gap between the valve core and the valve seat is reduced to be incapable of passing through fluid by means of compression deformation between the valve core and the valve seat. In the closed state, the material of the sealing contact surface of the valve core and the valve seat is subjected to compressive stress and generates elastic plastic deformation. Increase contact pressure, can increase elastoplastic deformation, be favorable to this closed condition's sealed, nevertheless can leave more elastoplastic deformation, have adverse effect to the roughness of sealed face, close next time and need higher contact pressure, the leakproofness of valve descends fast, influences the valve life-span.

The larger contact pressure requires larger driving force of the valve core, the load of each part of the valve is increased, the deformation is increased, and the reliability of the valve is reduced. Greater contact pressure stresses require control of seal face area. The sealing surface area depends on the fluid flow area and the sealing surface width. The flow area of the fluid cannot be too small, and the width of the sealing surface is limited, so that the sealing performance is influenced. The sealing surface area is narrow and small, and the sealing performance is fragile: when rigid solid impurities exist on the sealing surface, the sealing surface is not closed and the sealing property is damaged, and when the sealing surface is sunken and damaged, the sealing surface is not closed and the sealing property is damaged. The sealing surfaces are in one-dimensional compression contact fit sealing, when high-pressure fluid enters between the sealing surfaces, the sealing surfaces tend to be squeezed open, and the sealing performance is damaged.

Therefore, the sealing problem is caused by the mode that the existing valve realizes sealing by one-dimensional compression force pressing fit between the valve core and the valve seat.

In the method, the sealing performance and the opening and closing action of the valve are realized by adopting a mode that a spatial three-dimensional valve core with variable rigidity and capable of expanding and contracting deformation and a spatial three-dimensional valve seat formed by a valve body inner cavity with relatively higher rigidity realize three-dimensional compression contact between the valve core and the valve seat;

the valve has the advantages that the one-dimensional interaction force between the valve core and the valve seat of the existing valve is changed into three-dimensional interaction pressure, and the valve has the characteristics of good sealing performance, flexible and labor-saving opening and closing, good stress condition of parts, low manufacturing cost, self-pressurization sealing, high reliability, long service life and the like.