CN116255483A

CN116255483A - Valve seat and check valve

Info

Publication number: CN116255483A
Application number: CN202310511513.8A
Authority: CN
Inventors: 何振瑜; 张桂昌; 薛庆华; 潘兵兵; 庞志国; 申洪达; 杨在源
Original assignee: Dezhou United Petroleum Technology Corp
Current assignee: Dezhou United Petroleum Technology Corp
Priority date: 2023-05-09
Filing date: 2023-05-09
Publication date: 2023-06-13
Anticipated expiration: 2043-05-09
Also published as: CN116255483B

Abstract

The application relates to the technical field of hydraulic conveying valves, in particular to a valve seat and a check valve, wherein the valve seat and the check valve are used for an ocean vertical manifold, a fracturing manifold and a wellhead annular deflation device, and the valve seat is arranged in a valve body; the valve seat is connected with the valve body through a first thread structure and comprises an annular body, the annular body is provided with a flow passage for fluid to pass through, a guide assembly is arranged on the annular body, and the guide assembly is used for changing the flow direction of at least part of fluid in the flow passage so as to generate a driving force for tightening the first thread structure; the valve seat can effectively prevent the loosening and improve the use reliability.

Description

Valve seat and check valve

Technical Field

The application relates to the technical field of hydraulic conveying valves, in particular to a valve seat and a check valve for an ocean vertical manifold, a fracturing manifold and a wellhead annulus deflation device.

Background

The valve seat and valve body connection of the check valve is generally in two ways: threaded connection or welding. The screw connection is simple, the parts are assembled after finishing and are replaceable, and the maintenance is convenient. Welding, however, generally involves welding deformation, and therefore requires post-welding machining of the dimensions of the valve seat. The valve body needs to be integrally clamped, firstly, the workpiece is much larger, the clamping is troublesome, and special tools possibly need to be added; secondly, the processing part is positioned in the deep hole, so that a plurality of inconveniences are caused; thirdly, the valve seat is made of hard alloy by overlaying welding, special means are needed to process, the special means cannot be adopted at all, and the valve seat is easy to crack after welding. The welded parts are also not conventionally replaced, and problems occur, only the whole machine is replaced. These are no more than threaded connections in which the valve seat is machined and then assembled.

But the valve seat of the threaded connection has the problem of loose prevention. Most of the valve seats in threaded connection are mechanically wedged. In the working process, the valve clack/valve plate is influenced by alternating compression back and forth and the driving effect of fluid, the valve clack/valve plate has a loose trend, and once the valve clack/valve plate is slightly loosened, the valve clack/valve plate can develop towards an uncontrollable direction until the valve clack/valve plate fails and falls off, so that the use reliability is lower.

Disclosure of Invention

An object of the present application is to provide a valve seat and a check valve, which can effectively prevent the loosening of the valve seat, and improve the use reliability.

To this end, in a first aspect, embodiments of the present application provide a valve seat disposed within a valve body; the valve seat is connected with the valve body through a first thread structure and comprises an annular body, the annular body is provided with a flow passage for fluid to pass through, a guide assembly is arranged on the annular body, and the guide assembly is used for changing the flow direction of at least part of fluid in the flow passage so as to generate driving force for tightening the first thread structure.

In one possible implementation, the guide assembly is a spiral structure, and when the flow passage is opened, at least part of the fluid flows through the guide assembly of the spiral structure to generate a driving force for tightening the first screw structure.

In one possible implementation, the annular body has a first end and a second end disposed opposite in the direction of the flow path; the guide assembly is a first spiral groove arranged on the inner surface of the annular body, and the first spiral groove is communicated with the second end.

In one possible implementation, the annular body has a first end and a second end disposed opposite in the direction of the flow path; the guide assembly is a helical bore extending through the second end.

In one possible implementation manner, the annular body comprises an outer ring body and an inner ring body concentrically arranged inside the outer ring body, and the outer surface of the inner ring body is provided with a second spiral groove so as to form a spiral hole between the inner ring body and the outer ring body.

In one possible implementation, the guide assembly is a helical deflector disposed on the inner surface of the annular body.

In one possible implementation, the guide assembly is provided in plurality, and the plurality of guide assemblies are sequentially provided along the circumferential direction of the annular body.

In one possible implementation, the annular body is provided with a connection portion along one end of the flow passage, the connection portion being connected with the valve body by a first thread structure.

In a second aspect, embodiments of the present application provide a check valve comprising: a valve body; the valve seat is connected with the valve body through the first thread structure, and the annular body of the valve seat is provided with a flow passage for fluid to pass through; and the valve plate assembly is movably arranged in the valve body and used for controlling the opening and closing of the flow passage.

In one possible implementation, the check valve further includes an elastic member disposed at the first thread structure, and two sides of the elastic member respectively abut against the valve seat and the valve body.

According to the valve seat and the check valve provided by the embodiment of the application, the valve seat is connected with the valve body through the first thread structure, when fluid passes through the flow channel of the valve seat, part of fluid changes the flow direction through the guide component, the impact force of the fluid to the wire component is partially converted into the thrust for driving the valve seat to rotate, the first thread structure between the valve seat and the valve body is tightened through the thrust, the impact force of the fluid affecting the release of the valve seat is partially converted into the driving force for tightening the valve seat, the valve seat can be effectively prevented from loosening, and the use reliability is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings that are needed in the embodiments or the prior art descriptions, and it is obvious that the drawings in the following description are some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art. In addition, in the drawings, like parts are designated with like reference numerals and the drawings are not drawn to actual scale.

FIG. 1 is a schematic cross-sectional view of a valve seat according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of another valve seat according to an embodiment of the present application;

FIG. 3 is a schematic cross-sectional view of still another valve seat according to an embodiment of the present application;

FIG. 4 is a schematic perspective view of a valve seat according to an embodiment of the present disclosure;

FIG. 5 shows a schematic perspective view of another valve seat provided in an embodiment of the present application;

FIG. 6 shows a schematic perspective view of still another valve seat provided in an embodiment of the present application;

FIG. 7 shows a schematic view of an exploded construction of the valve seat shown in FIG. 6;

FIG. 8 is a schematic diagram of an exploded structure of a valve seat and an elastic member according to an embodiment of the present disclosure;

fig. 9 is a schematic cross-sectional view showing another check valve according to an embodiment of the present application.

Reference numerals illustrate:

1. a valve seat; 11. an annular body; 111. a flow passage; 112. a first end; 113. a second end; 114. an outer ring body; 115. an inner ring body; 116. a connection part; 12. a guide assembly; 121. a first helical groove; 122. a spiral hole; 1221. a second helical groove; 123. spiral guide vanes;

2. a valve body; 3. a valve plate assembly; 4. an elastic member.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.

As shown in fig. 1 to 8, the embodiment of the present application provides a valve seat provided in a valve body 2; the valve seat 1 is connected with the valve body 2 through a first thread structure, the valve seat 1 comprises an annular body 11, the annular body 11 is provided with a flow passage 111 for fluid to pass through, the annular body 11 is provided with a guide component 12, and the guide component 12 is used for changing the flow direction of at least part of fluid in the flow passage 111 so as to apply a driving force for tightening the first thread structure.

In this application, be connected with valve body 2 through first helicitic texture, when fluid passes through runner 111 of disk seat 1, partial fluid changes the flow direction through direction subassembly 12, the fluidic impact force part to wire subassembly turns into the pivoted thrust of drive disk seat 1, it is tight to going on the first helicitic texture between disk seat 1 and the valve body 2 to push up through this thrust, the fluid impact force part that will influence disk seat 1 pine takes off turns into the driving force that goes on tight to disk seat 1, can effectively prevent the condition that disk seat 1 pine takes off, guarantee check valve's life, improve the reliability in use.

Specifically, the valve body 2 in this application is the back valve, when there is not fluid flow in the valve body 2, the valve plate is closely with disk seat 1 and seals runner 111, there is not the external force that makes disk seat 1 pine take off, current disk seat 1 pine takes off the in-process of general emergence at fluid flow, fluid has certain impact force to disk seat 1, the valve plate switches between opening and closing and carries out the striking compression to disk seat 1 to cause disk seat 1's pine to take off, and this application is very at the in-process of fluid flow with the flow direction change of some fluid, make fluid apply the driving force of screwing to disk seat 1, tighten disk seat 1, thereby avoid disk seat 1 pine to take off the condition.

In some embodiments, the guide assembly 12 is a helical structure, and when the flow passage is open, at least a portion of the fluid flows through the guide assembly 12 of the helical structure to apply a driving force to tighten the first thread structure.

In this application, the guide component 12 is set to the spiral structure for there is partial fluid to act on the guide component 12 of spiral structure when fluid flows along runner 111 direction, changes the flow direction of fluid, and the reverse effort part that the fluid was applyed to the guide component 12 converts into the screwing force of disk seat 1, and it is tight to tighten to disk seat 1, and then plays the condition that prevents disk seat 1 pine and take off.

Specifically, the helical structure angle of the guide assembly 12 depends on the average flow rate of the fluid and the mass of the annular body 11, so that the tightening force applied to the valve seat 1 by the fluid can meet the tightening requirement of the valve seat 1.

As shown in fig. 1 and 4, in one embodiment, the annular body 11 has a first end 112 and a second end 113 disposed opposite along the direction of the flow channel 111; the guide assembly 12 is a first spiral groove 121 disposed on the inner surface of the annular body 11, and the first spiral groove 121 communicates with the first end 112 and/or the second end 113.

In the present application, the guide member 12 is a first spiral groove 121 provided on the inner surface of the annular body 11, and an impact force applied to the first spiral groove 121 when the fluid flows in the first spiral groove 121 is partially converted into a tightening force of the valve seat 1. The first spiral groove 121 is arranged on the inner surface of the annular body 11, the first spiral groove 121 is communicated with the flow channel 111, one end of the first spiral groove 121 is communicated with the first end 112, one end of the first spiral groove 121 is communicated with the second end 113, two ends of the first spiral groove 121 are respectively communicated with the first end 112 and the second end 113, fluid in the first spiral groove 121 can exert tightening force on the valve seat 1 when flowing, and the first spiral groove 121 is arranged in a mode that at least one end of the first spiral groove 121 is communicated with the end of the annular body 11, so that the fluid can conveniently enter the first spiral groove 121.

As shown in fig. 2 and 6, in some embodiments, the annular body 11 has a first end 112 and a second end 113 disposed opposite along the direction of the flow channel 111; the guide assembly 12 is a helical bore 122 extending through the first end 112 and the second end 113.

In this application, the guiding component 12 is a spiral hole 122 penetrating through the annular body 11, when fluid flows through the flow channel 111, a part of fluid flows through the spiral hole 122, the fluid is changed in flow direction by the spiral hole 122 when flowing through the spiral hole 122, the impact force of the fluid on the side wall of the spiral hole 122 is partially converted into a driving force for driving the annular body 11 to rotate and tighten, and then the annular body 11 is tightened, so that the reliability of connection between the annular body 11 and the valve body 2 is ensured. Specifically, when the pressure on both sides of the valve plate is reduced to be insufficient to push the valve plate open, the valve plate is abutted against the end of the valve seat 1, and the flow passage 111 and the spiral hole 122 are covered, so that the purpose of non-return is achieved.

As shown in fig. 7, further, the annular body 11 includes an outer ring body 114 and an inner ring body 115 concentrically disposed inside the outer ring body 114, and a second spiral groove 1221 is disposed on an outer surface of the inner ring body 115, so that a spiral hole 122 is formed between the inner ring body 115 and the outer ring body 114.

In this application, since the annular body 11 is inconvenient to directly process the spiral hole 122 which penetrates and has a spiral structure, the annular body 11 in this application adopts a structure in which the outer ring body 114 and the inner ring body 115 are sleeved, the second spiral groove 1221 is provided on the outer surface of the inner ring body 115, then the inner ring body 115 is assembled into the outer ring body 114, the outer circumferential surface of the inner ring body 115 abuts against the inner surface of the inner ring body 115, and the second spiral groove 1221 between the inner ring body 115 and the outer ring body 114 forms the spiral hole 122.

Alternatively, the spiral hole 122 may be directly machined in the annular body 11 with a monolithic structure, or a third spiral groove may be provided on the inner surface of the outer ring body 114, and the inner ring body 115 is assembled into the outer ring body 114 so that the third spiral groove forms the spiral hole 122 between the inner ring body 115 and the outer ring body 114, so long as the spiral hole 122 penetrating the first end 112 and the second end 113 can be formed in the annular body 11, and the machining form of the spiral hole 122 is not limited herein.

As shown in fig. 3 and 5, in some embodiments, the guide assembly 12 is a helical baffle 123 disposed on the inner surface of the annular body 11.

In this application, the spiral guide vane 123 through the internal surface of the annular body 11 guides the fluid, when the fluid flows through the flow channel 111, part of the fluid flows along the spiral guide vane 123, so that the part of the impact force of the fluid on the spiral guide vane 123 is converted into the driving force for driving the annular body 11 to rotate, and the driving force tightens the annular body 11, thereby ensuring the connection reliability of the annular body 11 and the valve body 2.

Specifically, the spiral guide vane 123 may be provided in a single piece or in a plurality of pieces, so that the fluid changes its direction when flowing through the spiral guide vane 123, thereby tightening the annular body 11.

In some embodiments, the guide assembly 12 is provided in plurality, and the plurality of guide assemblies 12 are provided in sequence along the circumferential direction of the annular body 11.

In this application, through set up a plurality of direction subassemblies 12 on annular body 11 for fluid will have stranded fluid to flow along a plurality of direction subassemblies 12 respectively when flowing through annular body 11, and then increase the fluid and apply the tight power of screwing up in annular body 11, guarantee can effectively tighten annular body 11.

Specifically, the plurality of guide assemblies 12 on the annular body 11 are uniformly arranged along the circumferential direction of the annular body 11, so that the tightening force of the fluid applied to the annular body 11 is uniform, and the tightening effect of the annular body 11 is further ensured.

Of course, the guiding assembly 12 may be set to a non-uniform form according to the nature of the fluid and the distribution of the fluid, and the flow rate of the fluid flowing through the guiding assembly 12 per unit time may be selected according to the actual situation, so as to ensure that the annular body 11 can be effectively tightened.

In some embodiments, the annular body 11 is provided with a connection portion 116 along one end of the flow passage 111, and the connection portion 116 is connected to the valve body 2 by a first screw structure.

In this application, the connection portion 116 of the annular body 11 is connected with the valve body 2 through a first thread structure, and the driving force when the first thread structure is tightened is the same as the direction of the rotational force applied to the annular body 11 by the fluid through the guide assembly 12, so that the driving force of the fluid acting on the guide assembly 12 is ensured to tighten the annular body 11.

This disk seat 1 passes through first screw structure and is connected with valve body 2, when the runner 111 of disk seat 1 is passed through to the fluid, and partial fluid changes the flow direction through direction subassembly 12, and the fluidic impact force part to wire subassembly turns into the pivoted thrust of drive disk seat 1, and the first screw structure between disk seat 1 and the valve body 2 is tightened through this thrust, turns into the drive force of going on tightening up to disk seat 1 with the fluid impact force part that influences disk seat 1 pine and takes off, can effectively prevent the circumstances that disk seat 1 pine takes off, ensures the life of check valve, improves the reliability in use.

As shown in fig. 9, an embodiment of the present application provides a check valve, including: a valve body 2; the valve seat 1, the valve seat 1 and the valve body 2 are connected by a first thread structure, and the annular body 11 of the valve seat 1 is provided with a flow passage 111 for fluid to pass through; and the valve plate assembly 3 is movably arranged in the valve body 2 and used for controlling the opening and closing of the flow channel 111.

In the present application, the check valve is used for unidirectional flow of fluid on the pipeline, and when the pressure difference between the fluid at the input end and the fluid at the output end of the check valve is greater than a preset value, the fluid automatically pushes the valve plate open, so that the fluid flows through the flow channel 111 and the guide assembly 12; when the difference between the fluid pressure at the input end and the fluid pressure at the output end of the check valve is smaller than a preset value, the valve plate is in a closed state, so that the purpose of check is achieved, and the valve plate covers the flow passage 111 and the guide assembly 12.

In some embodiments, the check valve further comprises an elastic member 4 disposed at the first thread structure, and both sides of the elastic member 4 are respectively abutted against the valve seat 1 and the valve body 2.

In this application, through set up elastic component 4 in the junction of valve body 2 and disk seat 1, increase the coefficient of friction between valve body 2 and the disk seat 1, further improve the reliability that disk seat 1 and valve body 2 are connected. Specifically, the elastic member 4 is made of a non-metallic material or a metallic material having an elastic structure.

It should be noted that references in the specification to "one embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A valve seat arranged in the valve body (2); the valve seat is characterized in that the valve seat (1) is connected with the valve body (2) through a first thread structure, the valve seat (1) comprises an annular body (11), the annular body (11) is provided with a flow passage (111) for fluid to pass through, the annular body (11) is provided with a guide assembly (12), and the guide assembly (12) is used for changing the flow direction of at least part of fluid in the flow passage (111) so as to generate driving force for tightening the first thread structure.

2. A valve seat according to claim 1, wherein the guide member (12) is of a helical configuration, at least part of the fluid flowing through the guide member (12) of the helical configuration when the flow passage is open, to generate a driving force for tightening the first thread formation.

3. The valve seat according to claim 2, wherein the annular body (11) has a first end (112) and a second end (113) arranged opposite in the direction of the flow passage (111);

the guide assembly (12) is a first spiral groove (121) arranged on the inner surface of the annular body (11), and the first spiral groove (121) is communicated with the first end (112) and/or the second end (113).

4. The valve seat according to claim 2, wherein the annular body (11) has a first end (112) and a second end (113) arranged opposite in the direction of the flow passage (111);

the guide assembly (12) is a helical bore (122) extending through the first end (112) and the second end (113).

5. The valve seat according to claim 4, wherein the annular body (11) comprises an outer ring body (114) and an inner ring body (115) concentrically arranged inside the outer ring body (114), the outer surface of the inner ring body (115) being provided with a second helical groove (1221) so that the helical hole (122) is formed between the inner ring body (115) and the outer ring body (114).

6. A valve seat according to claim 2, wherein the guide assembly (12) is a spiral deflector (123) provided on the inner surface of the annular body (11).

7. A valve seat according to any one of claims 1-6, wherein a plurality of said guide assemblies (12) are provided, a plurality of said guide assemblies (12) being disposed in sequence along the circumferential direction of said annular body (11).

8. Valve seat according to claim 1, characterized in that the annular body (11) is provided with a connecting portion (116) along one end of the flow channel (111), the connecting portion (116) being connected with the valve body (2) by means of the first screw structure.

9. A check valve, comprising:

a valve body (2);

a valve seat according to any one of claims 1 to 8, the valve seat (1) being connected to the valve body (2) by a first screw thread structure, the annular body (11) of the valve seat (1) having a flow passage (111) for the passage of a fluid; and

the valve plate assembly (3) is movably arranged in the valve body (2) and used for controlling the opening and closing of the flow channel (111).

10. The non-return valve according to claim 9, characterized in that it further comprises an elastic element (4) arranged at the first thread structure, both sides of the elastic element (4) being in abutment with the valve seat (1) and the valve body (2), respectively.