阅读说明：本技术 具有泄压功能的球面密封多通阀 (Spherical sealing multi-way valve with pressure relief function ) 是由 华忠志 乔玉龙 夏勇 何党联 邵靖 于 2020-06-22 设计创作，主要内容包括：本发明公开了一种具有泄压功能的球面密封多通阀,包括阀体、阀芯、阀座、介质进管和介质出管,阀芯中段的柱体上位于所有相邻两个径向介质孔之间的位置分别设有径向泄压孔和轴向泄压孔,每一个径向泄压孔的第一端能够与对应的阀座的内端连通,每一个径向泄压孔的第二端与对应的轴向泄压孔的第一端连通,轴向泄压孔的第二端位于阀芯中段的柱体的表面且开口并介质出管的内端连通。本发明通过在阀芯中段的柱体上位于所有相邻两个径向介质孔之间的位置分别设置径向泄压孔和轴向泄压孔,与阀座连通的上游管道因为与介质出管连通而不会产生憋压现象,避免了因上游管道压力过大而导致安全事故的风险。(The invention discloses a spherical sealing multi-way valve with a pressure relief function, which comprises a valve body, a valve core, a valve seat, a medium inlet pipe and a medium outlet pipe, wherein a radial pressure relief hole and an axial pressure relief hole are respectively arranged at positions between every two adjacent radial medium holes on a cylinder body in the middle section of the valve core, the first end of each radial pressure relief hole can be communicated with the inner end of the corresponding valve seat, the second end of each radial pressure relief hole is communicated with the first end of the corresponding axial pressure relief hole, and the second end of the axial pressure relief hole is positioned on the surface of the cylinder body in the middle section of the valve core, is opened and is communicated with the inner end of the. According to the invention, the radial pressure relief holes and the axial pressure relief holes are respectively arranged at the positions between all adjacent two radial medium holes on the cylinder body at the middle section of the valve core, so that an upstream pipeline communicated with the valve seat is communicated with the medium outlet pipe, thus the pressure holding phenomenon cannot be generated, and the risk of safety accidents caused by overlarge pressure of the upstream pipeline is avoided.)

1. A spherical sealing multi-way valve with pressure relief function comprises a valve body, a valve core, a valve seat, a medium inlet pipe and a medium outlet pipe, wherein the valve core is arranged in the valve body in a round pipe shape, a plurality of valve body mounting holes are uniformly formed in the circumferential wall of the valve body, the inner ends of the medium inlet pipes are respectively arranged in a plurality of valve body mounting holes which are in one-to-one correspondence to the circumferential wall of the valve body, the middle section of the valve core is a cylinder, the outer peripheral surface of the cylinder is an outer convex spherical surface, a plurality of radial medium holes which are uniformly distributed in the circumferential direction and are in one-to-one correspondence to the valve body mounting holes are formed in the cylinder in the middle section of the valve core, the valve seat is respectively arranged in the valve body mounting holes, the outer end of each valve seat is respectively in sealing connection with the inner end of the corresponding medium inlet pipe, and the through, the inner end of each valve seat is connected with the outer peripheral surface of the cylinder in the middle section of the valve core in a sliding and sealing mode and can be communicated with the first end of the corresponding radial medium hole, and the second ends of the radial medium holes are communicated with the medium outlet pipe; the method is characterized in that: the valve core is characterized in that a radial pressure relief hole and an axial pressure relief hole are respectively arranged at positions between every two adjacent radial medium holes on the cylinder in the middle section of the valve core, a first end of each radial pressure relief hole can be communicated with the corresponding inner end of the valve seat, a second end of each radial pressure relief hole is communicated with the corresponding first end of the corresponding axial pressure relief hole, and a second end of each axial pressure relief hole is positioned on the surface of the cylinder in the middle section of the valve core, is provided with an opening and is communicated with the inner end of the medium outlet pipe.

2. The spherical sealing multi-way valve with pressure relief function according to claim 1, characterized in that: the middle section hole wall or the inner section hole wall close to the inner end of the through hole of the valve seat is a flow guide hole wall, the flow guide hole wall is conical, and the outside diameter of the conical shape is larger than the inside diameter.

3. The spherical sealing multi-way valve with pressure relief function according to claim 2, characterized in that: the included angle between the flow guide hole wall and the central axis of the flow guide hole wall is 15-45 degrees.

4. The spherical sealing multi-way valve with pressure relief function according to claim 1, characterized in that: the diameter of the inner end sealing area of the valve seat is larger than that of the radial medium hole of the valve core.

5. The spherical sealing multi-way valve with pressure relief function according to claim 4, characterized in that: the diameter of the inner end sealing area of the valve seat is 5mm larger than that of the radial medium hole of the valve core.

6. A spherical sealing multi-way valve with pressure relief function according to any of claims 1-5, characterized in that: the medium outlet pipe comprises a first medium outlet pipe and a second medium outlet pipe, an axial center hole is arranged at the center of the cylinder at the middle section of the valve core, a plurality of axial peripheral holes are uniformly arranged on the cylinder at the middle section of the valve core around the axial central hole, the radial medium hole comprises a long radial medium hole with a longer length and a plurality of short radial medium holes with a shorter length, the second end of the radial medium long hole is communicated with the first end of the axial center hole, the second end of the axial center hole is positioned on the surface of the cylinder in the middle section of the valve core and is opened and communicated with the inner end of the first medium outlet pipe, the second ends of the radial medium short holes are respectively communicated with the first ends of the axial peripheral holes which correspond to each other one by one, and the second ends of the axial peripheral holes are respectively positioned on the surface of the cylinder in the middle section of the valve core and are opened and communicated with the inner end of the second medium outlet pipe.

7. The spherical sealing multi-way valve with pressure relief function according to claim 6, wherein: the number of the medium inlet pipe, the number of the radial medium holes, the number of the radial pressure relief holes and the number of the axial pressure relief holes are 8, and the number of the radial medium short holes is 7.

Technical Field

The invention relates to a spherical sealing multi-way valve, in particular to a spherical sealing multi-way valve with a pressure relief function.

Background

The multi-way valve is a rotary valve for controlling multi-way pipelines in a connecting way, and the basic structure of the multi-way valve is that a valve core is arranged in a valve body, and the valve core is rotated in a manual or electric mode to realize the on-off control of a plurality of channels.

The spool of the traditional multi-way valve is generally in a rotating arm structure, and the multi-way valve with the structure has the following defects: the valve seat is exposed in a medium for a long time and is a soft sealing structure, so that the valve seat is easy to damage; the valve seat sealing pretightening force needs to be adjusted every time, and special tools are needed for adjustment, so that production stop is caused; when the scraping ring on the rotating arm is used for cleaning the inner cavity wall, if the height is not well adjusted, the inner cavity wall cannot be scraped completely if the height is low, and if the height is high, the scraping ring is easy to scrape the sealing surface of the valve seat; the sealing surfaces of the rotating arm and the valve seat are narrow, and leakage is easy to occur if the positioning is not accurate. Generally, the rotary arm valve core of the traditional multi-way valve has the problems of poor sealing and poor durability.

In order to solve the above problems, the applicant has already applied for a utility model patent with patent number "ZL 201920947964.5", entitled "multichannel selective control device for fluid control", which is in operation, during the rotation of the valve core, the fluid can automatically clean the sealing surface of the valve core, thereby ensuring the continuity and reliability of the sealing between the valve core and the valve seat.

However, the above patent also has the following drawbacks: when the valve core rotates to enable the valve seat to be located between two medium holes of the valve core (the problem is inevitably caused when a channel corresponding to an oil-gas well needing to be measured is changed), the valve seat is sealed by the valve core, an outlet of a medium inlet pipe is sealed, and an upstream pipeline (namely a pipeline connected between the oil-gas well and the medium inlet pipe, wherein the oil-gas well refers to an oil well, a natural gas well or an oil-gas mixed well, and the same is used below) connected with the medium inlet pipe is easy to generate a pressure holding phenomenon, so that the risk of safety accidents caused by overlarge pressure exists; the through hole in the valve seat is a straight hole, fluid medium directly washes the sealing surface between the valve core and the valve seat after passing through the through hole of the valve seat, and the sealing surface is easy to corrode after long-term use, so that the sealing effect is reduced, and even the sealing is ineffective; the size of the sealing end of the valve seat is consistent with that of the medium hole of the valve core, the rotation precision of the valve core is required to be high, and the control difficulty is increased.

Disclosure of Invention

The present invention is directed to solve the above problems, and an object of the present invention is to provide a spherical sealing multi-way valve with a pressure relief function, which can prevent a safety accident caused by pressure build-up.

The invention realizes the purpose through the following technical scheme:

a spherical sealing multi-way valve with pressure relief function comprises a valve body, a valve core, a valve seat, a medium inlet pipe and a medium outlet pipe, wherein the valve core is arranged in the valve body in a round pipe shape, a plurality of valve body mounting holes are uniformly formed in the circumferential wall of the valve body, the inner ends of the medium inlet pipes are respectively arranged in a plurality of valve body mounting holes which are in one-to-one correspondence to the circumferential wall of the valve body, the middle section of the valve core is a cylinder, the outer peripheral surface of the cylinder is an outer convex spherical surface, a plurality of radial medium holes which are uniformly distributed in the circumferential direction and are in one-to-one correspondence to the valve body mounting holes are formed in the cylinder in the middle section of the valve core, the valve seat is respectively arranged in the valve body mounting holes, the outer end of each valve seat is respectively in sealing connection with the inner end of the corresponding medium inlet pipe, and the through, the inner end of each valve seat is connected with the outer peripheral surface of the cylinder in the middle section of the valve core in a sliding and sealing mode and can be communicated with the first end of the corresponding radial medium hole, and the second ends of the radial medium holes are communicated with the medium outlet pipe; the valve core is characterized in that a radial pressure relief hole and an axial pressure relief hole are respectively arranged at positions between every two adjacent radial medium holes on the cylinder in the middle section of the valve core, a first end of each radial pressure relief hole can be communicated with the corresponding inner end of the valve seat, a second end of each radial pressure relief hole is communicated with the corresponding first end of the corresponding axial pressure relief hole, and a second end of each axial pressure relief hole is positioned on the surface of the cylinder in the middle section of the valve core, is provided with an opening and is communicated with the inner end of the medium outlet pipe.

In the structure, the radial pressure relief holes and the axial pressure relief holes are arranged at positions between two adjacent radial medium holes, when the valve core rotates and the inner end of the valve seat is in surface contact with the valve core between two corresponding adjacent radial medium holes, the through hole of the valve seat can be communicated with the inner end of the medium outlet pipe through the radial pressure relief holes and the axial pressure relief holes, and an upstream pipeline communicated with the valve seat cannot generate a pressure-holding phenomenon because of being communicated with the medium outlet pipe.

Further, in order to reduce direct washing of a sealing surface between the valve core and the valve seat by a fluid medium, a middle section hole wall or an inner section hole wall close to the inner end of a through hole of the valve seat is a flow guide hole wall, the flow guide hole wall is conical, and the outside diameter of the conical shape is larger than the inside diameter. The guide hole wall is used for guiding the fluid medium to enable the fluid medium to have a tendency of flowing from the periphery to the center, so that the fluid medium is concentrated to the center of the radial medium hole as far as possible, and the purpose of reducing direct flushing of a sealing surface between the valve core and the valve seat is achieved.

Preferably, in order to achieve a good flow guiding effect and not affect the smooth flowing, an included angle between the flow guiding hole wall and the central axis of the flow guiding hole wall is 15-45 degrees.

Further, in order to reduce the requirement of the control precision of the rotation angle of the valve core, the diameter of the inner end sealing area of the valve seat is larger than that of the radial medium hole of the valve core. Therefore, even if the rotation angle of the valve core has an error of about 2 degrees, the sealing effect is still good, and the leakage problem does not exist.

Preferably, the diameter of the inner end sealing area of the valve seat is 5mm larger than that of the radial medium hole of the valve core.

Specifically, the medium outlet pipe comprises a first medium outlet pipe and a second medium outlet pipe, an axial center hole is arranged at the center of a cylinder at the middle section of the valve core, a plurality of axial peripheral holes are uniformly arranged on the cylinder at the middle section of the valve core around the axial central hole, the radial medium hole comprises a long radial medium hole with a longer length and a plurality of short radial medium holes with a shorter length, the second end of the radial medium long hole is communicated with the first end of the axial center hole, the second end of the axial center hole is positioned on the surface of the cylinder in the middle section of the valve core and is opened and communicated with the inner end of the first medium outlet pipe, the second ends of the radial medium short holes are respectively communicated with the first ends of the axial peripheral holes which correspond to each other one by one, and the second ends of the axial peripheral holes are respectively positioned on the surface of the cylinder in the middle section of the valve core and are opened and communicated with the inner end of the second medium outlet pipe.

Specifically, the number of the medium inlet pipe, the number of the radial medium holes, the number of the radial pressure relief holes and the number of the axial pressure relief holes are 8, and the number of the radial medium short holes is 7.

The invention has the beneficial effects that:

according to the invention, the radial pressure relief holes and the axial pressure relief holes are respectively arranged at the positions between all adjacent two radial medium holes on the cylinder body at the middle section of the valve core, the through hole of the valve seat can be communicated with the inner end of the medium outlet pipe through the radial pressure relief holes and the axial pressure relief holes, and an upstream pipeline communicated with the valve seat cannot generate a pressure holding phenomenon because of being communicated with the medium outlet pipe, so that the risk of safety accidents caused by overlarge pressure of the upstream pipeline is avoided; the middle section or the inner section of the through hole of the valve seat is provided with the flow guide hole wall to guide the fluid medium, so that the fluid medium has the tendency of flowing from the periphery to the center, the fluid medium is concentrated to the center of the radial medium hole as far as possible, and the aims of reducing the direct scouring of the sealing surface between the valve core and the valve seat and prolonging the sealing service life are fulfilled; by designing the diameter of the inner end sealing area of the valve seat to be larger than the diameter of the radial medium hole of the valve core, even if a certain error (about +/-2 degrees) exists in the rotation angle of the valve core, the sealing effect is still good, the leakage problem does not exist, the requirement on the control precision of the rotation angle of the valve core is reduced, and the valve core is convenient to apply.

Drawings

FIG. 1 is a front cross-sectional view of a spherical sealing multi-way valve with pressure relief of the present invention;

FIG. 2 is a sectional view A-A of FIG. 1;

FIG. 3 is a top cross-sectional view of the cylinder at the middle section of the valve core of the spherical sealing multi-way valve with pressure relief function according to the present invention, which has the same angle as that of FIG. 2;

FIG. 4 is a cross-sectional view B-B of FIG. 3;

FIG. 5 is a cross-sectional view of the valve seat of the spherical sealing multi-way valve with pressure relief of the present invention.

Detailed Description

The invention will be further described with reference to the accompanying drawings in which:

as shown in fig. 1 to 5, the spherical sealing multi-way valve with pressure relief function of the present invention includes a valve body 4, a valve core 3, a valve seat 7, a medium inlet pipe 9 and a medium outlet pipe, the valve core 3 is disposed in the circular pipe shaped valve body 4, a plurality of valve body mounting holes (not marked in the figure) are uniformly disposed on the circumferential wall of the valve body 4, inner ends of the medium inlet pipes 9 are respectively mounted in the plurality of valve body mounting holes corresponding to the circumferential wall of the valve body 4 one by one, a middle section of the valve core 3 is a cylinder, an outer circumferential surface of the cylinder is an outer convex spherical surface 5, a plurality of radial medium holes (a radial medium long hole 6 and a radial medium short hole 10 below) are uniformly distributed in the circumferential direction and correspond to the plurality of valve body mounting holes one by one, the valve seats 7 are respectively mounted in the plurality of valve body mounting holes, the valve seats 7 are provided with through holes, an outer end of each valve seat 7 is respectively connected to an inner end of the corresponding medium The through holes of the medium inlet pipes 9 are communicated, the inner end of each valve seat 7 is respectively connected with the outer peripheral surface of the cylinder at the middle section of the valve core 3 in a sliding and sealing manner and can be communicated with the first ends of the corresponding radial medium holes, and the second ends of the radial medium holes are communicated with the medium outlet pipes (see a first medium outlet pipe 14 and a second medium outlet pipe 16 below); radial pressure relief holes 22 and axial pressure relief holes 21 are respectively formed in positions, located between all adjacent two radial medium holes, on the cylinder in the middle section of the valve core 3, a first end of each radial pressure relief hole 10 can be communicated with the inner end of the corresponding valve seat 7, a second end of each radial pressure relief hole 22 is communicated with the first end of the corresponding axial pressure relief hole 21, and a second end of each axial pressure relief hole 21 is located on the surface of the cylinder in the middle section of the valve core 3, is opened and is communicated with the inner ends of the medium outlet pipes. Description of the drawings: the axial direction refers to the axial direction of the valve body 4 and the valve body 3 (the axial direction of the valve body 4 and the valve body 3 is the same), and the radial direction refers to the radial direction of the valve body 4 and the valve body 3.

Fig. 1 also shows a valve rod 1, a valve cover 2, a first connecting pipe 13, a second connecting pipe 15, a bottom cover 18, a blow-down valve 19 and a base 20, wherein the upper end of the valve rod 1 is connected with a driving device (such as an electric actuator or a handle like a servo motor), the lower end of the valve rod 1 passes through the valve cover 2 and then is connected with one end (the upper end in the figure) of the valve core 3, the valve cover 2 is installed at the end of the valve body 4, two ends of the first connecting pipe 13 are respectively connected with the other end (the lower end in the figure) of the valve core 3 and a medium outlet pipe (hereinafter, referred to as a first medium outlet pipe 14), one end (the upper end in the figure) of the second connecting pipe 15 is connected with the valve body, the other end (the lower end in the figure) of the second connecting pipe 15 is a connecting end 17 with a reduced inner diameter, the bottom cover 18 is installed on the connecting end 17, the blow-down valve 19, the other medium outlet pipe (hereinafter, the second medium outlet pipe 16) is connected to the second connection pipe 15 in communication, and these structures are conventional adaptive structures.

As shown in fig. 1-5, when in use, the outer ends of a plurality of medium inlet pipes 9 are communicated with a plurality of oil and gas wells, fluid medium (oil, natural gas or oil and gas mixture) in the oil and gas wells enters the valve body 4 through the medium inlet pipes 9, the valve core 3 is controlled to rotate by the driving device, the fluid medium in different oil and gas wells is distributed, that is, one path of medium is distributed to one medium outlet pipe for metering, and other paths of medium are distributed to the other medium outlet pipe for production. In the rotation process of the valve core 3, when the valve seat 7 is in butt joint with the radial medium hole, the fluid medium can be discharged from the medium outlet pipe, and the problem of upstream pipeline pressure building is solved; however, when the valve seat 7 is just located between two adjacent radial medium holes, if no pressure relief hole exists, the inner end of the valve seat 7 is sealed, and the risk of pressure-holding-up causing safety accidents exists in the upstream pipeline.

As shown in fig. 1 to 5, a plurality of more optimized specific structures are disclosed below, and the more optimized technical solution can be formed by combining the above structures with one or more of the following structures in an overlapping manner according to actual needs.

In order to reduce the direct scouring of the fluid medium on the sealing surface between the valve core 3 and the valve seat 7, the middle section hole wall or the inner section hole wall close to the inner end of the through hole of the valve seat 7 is a flow guide hole wall 8, the flow guide hole wall 8 is conical, and the outside diameter of the conical shape is larger than the inside diameter. When the fluid medium flows through the valve seat 7, the flow guide hole wall 8 guides the fluid medium to enable the fluid medium to have a tendency of flowing from the periphery to the center, so that the fluid medium is concentrated to the center of the radial medium hole as far as possible, and the purpose of reducing direct flushing of a sealing surface between the valve core 3 and the valve seat 7 is achieved. Fig. 5 also shows a relief groove 23 provided on the inner wall of the valve seat 7, which is of conventional construction.

In order to achieve a good flow guiding effect and not affect the smooth flow, the included angle between the flow guiding hole wall 8 and the central axis thereof is 15-45 degrees, and more preferably 30 degrees.

In order to reduce the requirement of the rotation angle control precision of the valve core 3, the diameter of the inner end sealing area of the valve seat 7 is larger than the diameter of the radial medium hole of the valve core 3, and is preferably larger than 5 mm. When the valve core 3 is applied, even if the rotation angle of the valve core 3 has an error of about 2 degrees, the sealing effect is still good, and the leakage problem does not exist.

The medium outlet pipe comprises a first medium outlet pipe 14 and a second medium outlet pipe 16, an axial center hole 12 is arranged at the center of the cylinder at the middle section of the valve core 3, a plurality of axial peripheral holes 11 are uniformly arranged on the cylinder at the middle section of the valve core 3 around the axial center hole 12, the radial medium holes comprise a radial medium long hole 6 with a long length and a plurality of radial medium short holes 10 with a short length, the second end of the radial medium long hole 6 is communicated with the first end of an axial center hole 12, the second end of the axial center hole 12 is positioned on the surface of the cylinder at the middle section of the valve core 3 and is opened and is communicated with the inner end of a first medium outlet pipe 14, the second ends of the radial medium short holes 10 are respectively communicated with the first ends of a plurality of axial peripheral holes 11 in one-to-one correspondence, and the second ends of the axial peripheral holes 11 are respectively positioned on the surface of the cylinder at the middle section of the valve core 3 and are opened and are communicated with the inner end of a second medium outlet pipe 16. When the metering valve is applied, the first medium outlet pipe 14 is connected with metering equipment, the second medium outlet pipe 16 is connected with production equipment, the valve core 3 is rotated until the valve seat 7 corresponding to the oil-gas well needing to be metered is butted with the radial medium long hole 6, and the valve seats 7 corresponding to other oil-gas wells are butted with the radial medium short holes 10, so that the fluid medium produced by the oil-gas well needing to be metered is sent to the metering equipment to realize metering, and the fluid medium produced by other oil-gas wells is sent to the production equipment to realize production; when the fluid medium of another oil and gas well needs to be metered, the valve core 3 is rotated again, and the metering can be realized by a similar method.

The number of the medium inlet pipe 9, the number of the radial medium holes, the number of the radial pressure relief holes 22 and the number of the axial pressure relief holes 21 are 8, and the number of the radial medium short holes 10 is 7.

The above-mentioned multi-way valve is not described in more detail, and is not an innovation of the present invention, and reference may be made to the utility model patent No. ZL201920947964.5 entitled "multi-channel selection control device for fluid control", which is a product of the same type as the multi-way valve of the present application, and the present invention is improved on the basis of the patent.

The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, so long as the technical solutions can be realized on the basis of the above embodiments without creative efforts, which should be considered to fall within the protection scope of the patent of the present invention.