shutoff valve

Abstract

The application relates to the refrigeration technical field, in particular to a stop valve. The stop valve comprises a valve pipe, a first valve body and a second valve body, the valve pipe is provided with a valve cavity and a connecting hole, and the connecting hole is arranged on the side wall of the valve pipe. In the axial direction of the valve cavity, at least part of the first valve body and at least part of the second valve body are respectively arranged in the valve cavity, and the first valve body and the second valve body are arranged in a spaced mode, and the part of the valve cavity axially spaced from the first valve body and the second valve body is defined as a flow-through cavity, and the flow-through cavity is communicated with the connecting hole. The stop valve provided by the application solves the problem that the stop valve is difficult to manufacture.

Description

Technical Field

[0001] This application relates to the field of refrigeration technology, and in particular to a shut-off valve. Background Technology

[0002] Gate valves are widely used in refrigeration system piping to control the flow of media within the piping. Currently, some gate valves consist of a valve tube, a valve body, and a valve core. The valve body has a valve cavity and a valve port. The valve tube is fitted over the valve body and fixedly connected to it. The valve core is movably installed inside the valve body and is used to open and close the valve port.

[0003] In related technologies, to ensure smooth flow of the medium, the valve pipe sidewall is provided with a connecting pipe hole for installing the connecting pipe, and the valve body is provided with a connecting pipe hole corresponding to the connecting pipe hole. Furthermore, to ensure the movement space of the valve core within the valve body and the fit strength between the valve body and the valve core, the valve body typically has a long axial dimension and requires a large wall thickness. This not only makes it difficult to create the connecting pipe hole, but also increases the difficulty of achieving concentricity and alignment with the connecting pipe hole during assembly with the valve pipe, resulting in greater manufacturing difficulty for the gate valve. Utility Model Content

[0004] Therefore, it is necessary to provide a gate valve to solve the problem of the difficulty in manufacturing gate valves.

[0005] This application provides a shut-off valve, which includes a valve pipe, a first valve body, and a second valve body. The valve pipe has a valve cavity and a connecting hole, and the connecting hole is located on the side wall of the valve pipe. Along the axial direction of the valve cavity, at least a portion of the first valve body and at least a portion of the second valve body are respectively installed in the valve cavity, and the first valve body and the second valve body are spaced apart. The portion of the valve cavity located axially spaced between the first valve body and the second valve body is defined as a flow cavity, and the flow cavity communicates with the connecting hole.

[0006] In one embodiment, the first valve body has an assembly hole, and the end of the assembly hole near the second valve body has an internal thread. The second valve body has a valve port, which communicates with the connecting hole. The shut-off valve also includes a valve core, which is installed in the assembly hole. The outer wall of the valve core has an external thread, which engages with the internal thread. The valve core can move along the axial direction of the valve cavity toward or away from the second valve body to open or close the valve port.

[0007] In one embodiment, the first valve body and / or the second valve body are integrally formed structures.

[0008] In one embodiment, the valve core has a recessed sealing groove at one end near the valve port, and the shut-off valve further includes a sealing element installed in the sealing groove. When the valve port is closed, the sealing element can abut against the second valve body.

[0009] In one embodiment, the second valve body has a protrusion at one end near the first valve body, the protrusion surrounding the outer periphery of the valve port, and when the valve port is closed, at least a portion of the protrusion is embedded in the seal.

[0010] In one embodiment, the end face of the seal does not protrude from the opening of the sealing groove along the axial direction of the valve cavity.

[0011] In one embodiment, the valve core is provided with a limiting portion at one end near the second valve body, and the limiting portion stops the seal along the axial direction of the valve cavity.

[0012] In one embodiment, the sidewall at the opening of the sealing groove is bent toward the interior portion of the sealing groove to form the limiting portion.

[0013] In one embodiment, the limiting part is a riveted structure.

[0014] In one embodiment, the valve core has a recessed countersunk hole at one end near the second valve body, and the sealing groove surrounds the outer periphery of the countersunk hole; the shut-off valve further includes a connector, one end of which abuts against the seal to form the limiting portion, and the other end of which passes through the seal and extends into the countersunk hole; wherein the connector is threaded or interference-fitted with the countersunk hole.

[0015] Compared with existing technologies, the gate valve provided in this application, by setting a first valve body and a second valve body spaced apart along the axial direction of the valve cavity, can be regarded as dividing the traditional single long valve body structure into two segments. This significantly reduces the length of each valve body segment, allowing them to be processed separately, thereby effectively reducing the processing difficulty. Simultaneously, the gap between the first and second valve bodies forms a flow cavity, which directly communicates with the connecting hole. This eliminates the need for side hole processing on the valve body, reducing processing steps and difficulty, and also eliminates the need for side hole alignment, greatly reducing assembly difficulty. Furthermore, since this application eliminates the valve body structure corresponding to the connecting hole, it can increase the flow area by at least the thickness of the valve body compared to the traditional structure. That is, the flow cavity of this application has a larger flow area and reduces flow resistance, which is beneficial to improving the flow performance of the medium. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the structure of a shut-off valve according to an embodiment of this application;

[0018] Figure 2 A cross-sectional view of the valve pipe, first valve body, and second valve body in accordance with an embodiment provided in this application;

[0019] Figure 3 A cross-sectional view of a shut-off valve according to an embodiment of this application;

[0020] Figure 4 A cross-sectional view of a shut-off valve according to another embodiment provided in this application;

[0021] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0022] The symbols in the diagram represent the following meanings:

[0023] 100. Gate valve; 10. Valve pipe; 101. Valve cavity; 1011. Flow cavity; 102. Connecting hole; 20. First valve body; 201. Assembly hole; 21. Internal thread; 30. Second valve body; 301. Valve port; 31. Protrusion; 40. Valve core; 401. Sealing groove; 402. Countersunk hole; 41. External thread; 42. Limiting part; 50. Seal; 60. Connector; 70. First connecting pipe; 80. Second connecting pipe. Detailed Implementation

[0024] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0025] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0029] Gate valves are widely used in refrigeration system piping to control the flow of media within the piping. Currently, some gate valves consist of a valve tube, a valve body, and a valve core. The valve body has a valve cavity and a valve port. The valve tube is fitted over the valve body and fixedly connected to it. The valve core is movably installed inside the valve body and is used to open and close the valve port.

[0030] In related technologies, to ensure smooth flow of the medium, the valve pipe sidewall is provided with a connecting pipe hole for installing the connecting pipe, and the valve body is provided with a connecting pipe hole corresponding to the connecting pipe hole. Furthermore, to ensure the movement space of the valve core within the valve body and the fit strength between the valve body and the valve core, the valve body typically has a long axial dimension and requires a large wall thickness. This not only makes it difficult to create the connecting pipe hole, but also increases the difficulty of achieving concentricity and alignment with the connecting pipe hole during assembly with the valve pipe, resulting in greater manufacturing difficulty for the gate valve.

[0031] Please see Figures 1-5 To address the challenge of manufacturing gate valves, this application provides a gate valve 100. The gate valve 100 includes a valve pipe 10, a first valve body 20, and a second valve body 30. The valve pipe 10 has a valve cavity 101 and a connecting hole 102, which is located on the side wall of the valve pipe 10. Along the axial direction of the valve cavity 101, at least a portion of the first valve body 20 and at least a portion of the second valve body 30 are respectively installed within the valve cavity 101, with the first valve body 20 and the second valve body 30 spaced apart. The portion of the valve cavity 101 located axially spaced between the first valve body 20 and the second valve body 30 is defined as a flow cavity 1011, which communicates with the connecting hole 102.

[0032] It is understood that by setting a first valve body 20 and a second valve body 30 spaced apart along the axial direction of the valve cavity 101, this application can be regarded as dividing the traditional single long valve body structure into two segments. This significantly reduces the length of each valve body segment, allowing them to be processed separately, thereby effectively reducing the processing difficulty. Simultaneously, the gap between the first valve body 20 and the second valve body 30 forms a flow cavity 1011, which directly communicates with the connecting hole 102. This eliminates the need for side hole processing on the valve body, reducing processing steps and difficulty, and also eliminates the need for side hole alignment, thus greatly reducing assembly difficulty. Furthermore, since this application eliminates the valve body structure corresponding to the connecting hole 102, compared to the traditional structure, it can at least increase the flow area by the thickness of the valve body. That is, the flow cavity 1011 of this application has a larger flow area and reduces flow resistance, which is beneficial to improving the flow performance of the medium.

[0033] Furthermore, since this application does not require side hole alignment, the requirements for concentricity, coaxiality, and roundness of the fit between the first valve body 20, the second valve body 30, and the valve pipe 10 can be reduced. Also, since the first valve body 20 and the second valve body 30 are partially inserted into the same valve pipe 10, they can be guaranteed to be on the same axis. Simultaneously, there are no special requirements for the roughness of the inner wall of the valve cavity 101 on the valve pipe 10, allowing the use of structures such as welded steel pipes, further saving material costs. Moreover, the larger the specification of the gate valve 100, the more significantly its processing difficulty is reduced.

[0034] In one embodiment, the shut-off valve 100 further includes a valve core 40, a first connecting pipe 70, and a second connecting pipe 80. The first valve body 20 has an assembly hole 201, and the second valve body 30 has a valve port 301, which communicates with the connecting hole 102. The valve core 40 is movably installed within the assembly hole 201 and can cooperate with the valve port 301 to achieve the opening and closing of the valve port 301. The first connecting pipe 70 is connected to the connecting hole 102 and communicates with the flow cavity 1011. The second connecting pipe 80 is connected to the second valve body 30 and communicates with the flow cavity 1011 through the valve port 301.

[0035] To facilitate the movement of the valve core 40, in one embodiment, such as Figures 2-4 As shown, the assembly hole 201 has an internal thread 21 at one end near the second valve body 30, and the outer wall of the valve core 40 has an external thread 41. The external thread 41 and the internal thread 21 are threadedly engaged, allowing the valve core 40 to move along the axial direction of the valve cavity 101 towards or away from the second valve body 30 to open or close the valve port 301. The inner wall of the assembly hole 201 can slide against the valve core 40, thus guiding the movement of the valve core 40, improving the coaxiality of the valve core 40 and the first valve body 20, and ensuring the stability of the valve core 40's movement.

[0036] Specifically, in traditional long valve body structures, the thread machining stroke is long, and due to the presence of side holes, burrs are easily generated during the machining process. However, this application only requires local machining on the first valve body 20, which effectively shortens the thread length, thereby reducing thread machining and further reducing the machining difficulty.

[0037] In one embodiment, the first valve body 20 is an integrally formed structure, that is, the internal thread 21 can be integrally machined at the same time as the assembly hole 201 is machined. This has high processing efficiency and controllable size, which helps to improve the concentricity and smoothness of the assembly hole 201 and the internal thread 21, thereby ensuring that the valve core 40 will not wobble when it rotates.

[0038] Specifically, the internal thread 21 can be formed in one piece by turning.

[0039] Furthermore, in one embodiment, the second valve body 30 is an integrally formed structure, which facilitates the processing of structures such as the valve port 301, thereby further reducing the processing difficulty. During assembly, the second valve body 30 can be first tightly fitted to the valve pipe 10, and then fixed by welding, thereby effectively ensuring the connection strength between the second valve body 30 and the valve pipe 10.

[0040] In one embodiment, such as Figure 3 and Figure 4As shown, a sealing groove 401 is formed by a recess at one end of the valve core 40 near the valve port 301. The gate valve 100 also includes a sealing element 50, which is installed in the sealing groove 401. When the valve port 301 is closed, the sealing element 50 can abut against the second valve body 30 to form a soft seal. In this way, the soft seal provided by the sealing element 50 can effectively compensate for leakage caused by uneven end faces after product assembly, ensuring the reliability of the seal. Therefore, the parallelism requirement of the product can be reduced to a certain extent, which facilitates the processing of accessories, thereby reducing the cost of the gate valve 100 without affecting its safety performance.

[0041] To further improve sealing performance, in one embodiment, such as Figures 2-5 As shown, the second valve body 30 has a protruding portion 31 at one end near the first valve body 20. The protruding portion 31 surrounds the outer periphery of the valve port 301, and when the valve port 301 is closed, at least a portion of the protruding portion 31 is embedded in the sealing member 50. It is easy to understand that when the protruding portion 31 is embedded in the sealing member 50, the sealing member 50 can undergo elastic deformation under force. Under the action of elastic restoring force, the sealing member 50 can fit tightly with the protruding portion 31, thereby ensuring the sealing performance of the valve port 301 when closed and preventing leakage. Simultaneously, the sealing cooperation between the sealing member 50 and the protruding portion 31 can also reduce the sealing torque of the valve core 40.

[0042] In one embodiment, the end face of the seal 50 does not protrude from the opening of the sealing groove 401 along the axial direction of the valve cavity 101. That is, the end of the valve core 40 can provide support to prevent the valve core 40 from moving excessively toward the valve port 301, ensuring that the protrusion 31 does not exert a large force on the seal 50, causing the seal 50 to be damaged and fail, thereby ensuring the sealing performance.

[0043] Specifically, the outer wall portion of the sealing groove 401, i.e., the side wall of the sealing groove 401 away from the axis of the valve cavity 101, is used for support. Preferably, the end face of the sealing element 50 is flush with the opening of the sealing groove 401.

[0044] In one embodiment, such as Figures 3-5 As shown, the valve core 40 is provided with a limiting part 42 at one end near the second valve body 30. The limiting part 42 stops the seal 50 along the axial direction of the valve cavity 101 to improve the installation reliability of the seal 50 and prevent the seal 50 from falling out of the sealing groove 401 under the flushing of the fluid medium, thereby ensuring the reliability of the seal.

[0045] In one embodiment, such as Figure 3 and Figure 4 As shown, a countersunk hole 402 is formed at one end of the valve core 40 near the second valve body 30. A sealing groove 401 surrounds the outer periphery of the countersunk hole 402. Here, the sealing groove 401 may or may not be connected to the countersunk hole 402.

[0046] Specifically, in one embodiment, such as Figure 3 As shown, the shut-off valve 100 also includes a connector 60. One end of the connector 60 abuts against the seal 50 to form a limiting part 42, and the other end of the connector 60 passes through the seal 50 and extends into the countersunk hole 402. The connector 60 and the countersunk hole 402 are threaded or interference-fitted. Thus, the connection between the connector 60 and the countersunk hole 402 further limits the sealing element 50, resulting in a simple structure and quick assembly. At this time, the sealing groove 401 can directly communicate with the countersunk hole 402, thereby eliminating the need for the sidewall separating the sealing groove 401 and the countersunk hole 402, facilitating machining.

[0047] In another embodiment, such as Figure 4 and Figure 5 As shown, the sidewall at the opening of the sealing groove 401 is bent towards the interior of the sealing groove 401 to form a limiting part 42. At this time, a sidewall can be provided between the sealing groove 401 and the countersunk hole 402 for separation, and the limiting part 42 can be formed by bending this sidewall, thus achieving the same limiting effect on the sealing element 50. To reduce the force exerted by the limiting part 42 on the sealing element 50, a chamfer can be correspondingly provided on the sealing element 50 for fit.

[0048] Specifically, the limiting part 42 is a riveted forming structure. The limiting part 42 is processed and deformed by riveting. The overall operation is simple, the production efficiency is high, and the cost is low.

[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A shut-off valve, characterized in that, It includes a valve tube (10), a first valve body (20) and a second valve body (30). The valve tube (10) has a valve cavity (101) and a connecting hole (102). The connecting hole (102) is located on the side wall of the valve tube (10). Along the axial direction of the valve cavity (101), at least a portion of the first valve body (20) and at least a portion of the second valve body (30) are respectively installed in the valve cavity (101), and the first valve body (20) and the second valve body (30) are spaced apart. The portion of the valve cavity (101) located axially spaced between the first valve body (20) and the second valve body (30) is defined as the flow cavity (1011), and the flow cavity (1011) communicates with the connecting hole (102).

2. The shut-off valve according to claim 1, characterized in that, The first valve body (20) has an assembly hole (201), and the assembly hole (201) has an internal thread (21) at one end near the second valve body (30). The second valve body (30) has a valve port (301), and the valve port (301) communicates with the connecting hole (102). The shut-off valve also includes a valve core (40), which is installed in the assembly hole (201). The outer wall of the valve core (40) is provided with an external thread (41), which is threadedly engaged with the internal thread (21). The valve core (40) can move along the axial direction of the valve cavity (101) toward the direction closer to or away from the second valve body (30) to open or close the valve port (301).

3. The shut-off valve according to claim 2, characterized in that, The first valve body (20) and / or the second valve body (30) are integrally formed structures.

4. The shut-off valve according to claim 2, characterized in that, The valve core (40) has a recessed sealing groove (401) at one end near the valve port (301). The shut-off valve also includes a sealing element (50), which is installed in the sealing groove (401). When the valve port (301) is closed, the sealing element (50) can abut against the second valve body (30).

5. The shut-off valve according to claim 4, characterized in that, The second valve body (30) has a protrusion (31) at one end near the first valve body (20). The protrusion (31) surrounds the outer periphery of the valve port (301), and when the valve port (301) is closed, at least a portion of the protrusion (31) is embedded in the seal (50).

6. The shut-off valve according to claim 5, characterized in that, Along the axial direction of the valve cavity (101), the end face of the seal (50) does not protrude from the opening of the sealing groove (401).

7. The shut-off valve according to any one of claims 4-6, characterized in that, The valve core (40) has a limiting part (42) at one end near the second valve body (30), and the limiting part (42) stops the seal (50) along the axial direction of the valve cavity (101).

8. The shut-off valve according to claim 7, characterized in that, The side wall at the opening of the sealing groove (401) is bent toward the interior of the sealing groove (401) to form the limiting part (42).

9. The shut-off valve according to claim 8, characterized in that, The limiting part (42) is a riveted structure.

10. The shut-off valve according to claim 7, characterized in that, The valve core (40) has a recessed countersunk hole (402) at one end near the second valve body (30), and the sealing groove (401) surrounds the outer periphery of the countersunk hole (402); The shut-off valve also includes a connector (60), one end of which abuts against the seal (50) to form the limiting part (42), and the other end of which passes through the seal (50) and extends into the countersunk hole (402). The connector (60) is threaded or interference-fitted with the countersunk hole (402).

Images