Stop valve

Abstract

The stop valve comprises an upper valve body component, a lower valve body component, a valve rod component and a sealing piece, the upper valve body component is detachably connected with the lower valve body component, the sealing piece comprises a sealing part and an auxiliary part, the upper valve body component comprises an upper abutting part, the lower valve body component comprises a lower abutting part, and the sealing part is detachably connected with the lower valve body component. One end face of the sealing part abuts against the upper abutting part, the other end face of the sealing part abuts against the lower abutting part, the auxiliary part is located in an inner cavity of the stop valve, at least part of the valve rod component is located in the inner cavity of the stop valve, the valve rod component comprises a diameter expanding part, and the diameter expanding part is located in the longitudinal direction of the stop valve. The diameter expanding part is located below the auxiliary part, and in the disassembling process of the upper valve body part and the lower valve body part, the diameter expanding part can drive the sealing piece to be separated from an inner cavity of the stop valve. According to the stop valve, the maintenance convenience can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid control, in particular to a stop valve. Background Art

[0002] Figure 6 The background technology is shown as a schematic diagram of the overall structure of a stop valve. As shown in the figure, the valve includes an upper valve body part 1', a fixing pin 2', a lower valve body part 3', and a sealing member 4'. The upper valve body part 1' is threadedly connected to the lower valve body part 3', and the thread is locked by the fixing pin 2'. The sealing member 4' is located at the abutment and matching position of the upper valve body part 1' and the lower valve body part 3'. Since the upper valve body part 1' and the lower valve body part 3' are tightened by a set torque, the sealing member 4' is squeezed and deformed by force. When the stop valve needs to be disassembled for maintenance or replacement of the sealing member 4', due to the limited operating space, the sealing member 4' is difficult to remove, and the maintenance convenience has room for improvement. Utility Model Content

[0003] The purpose of the present application is to provide a stop valve, comprising: an upper valve body component, a lower valve body component, a valve stem component, and a sealing member, wherein the upper valve body component is detachably connected to the lower valve body component, the sealing member comprises a sealing portion and an auxiliary portion, the upper valve body component comprises an upper abutting portion, the lower valve body component comprises a lower abutting portion, one end face of the sealing portion abuts against the upper abutting portion, and the other end face of the sealing portion abuts against the lower abutting portion, the auxiliary portion is located in the inner cavity of the stop valve, the valve stem component is at least partially located in the inner cavity of the stop valve, the valve stem component comprises an expanded diameter portion, and along the longitudinal direction of the stop valve, the expanded diameter portion is located below the auxiliary portion, and during the disassembly process of the upper valve body component and the lower valve body component, the expanded diameter portion can drive the sealing member to be separated from the inner cavity of the stop valve. The stop valve of the present application can improve the convenience of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0004] Figure 1 Shown is a structural schematic diagram of a specific embodiment of the utility model;

[0005] Figure 2 Shown Figure 1 A schematic diagram of a sealing member in Embodiment 1;

[0006] Figure 3 Shown Figure 1 A schematic cross-sectional view of the valve core component;

[0007] Figure 4 Shown Figure 1 A local enlarged schematic diagram of point I in the middle;

[0008] Figure 5 Shown is a schematic diagram of a sealing member according to the second embodiment of the present application;

[0009] Figure 6 Shown is a schematic structural diagram of the background art.

[0010] Figure 1-Figure 5 Symbol description in [figure]:

[0011] 1 - Upper valve body component;

[0012] 110 - Upper valve body;

[0013] 1110 - Upper abutting portion;

[0014] 2 - Lower valve body component;

[0015] 210 - Lower valve body;

[0016] 2110 - First port;

[0017] 2120 - Second port;

[0018] 2130 - Lower abutting portion;

[0019] 2140 - Valve port;

[0020] 3 - Valve stem component;

[0021] 310 - Valve stem;

[0022] 320 - Spool component;

[0023] 3210 - Spool;

[0024] 3221 - Cylindrical portion;

[0025] 3212 - Diameter-expanded portion;

[0026] 4 - Seal;

[0027] 410 - Sealing portion;

[0028] 420 - Auxiliary portion;

[0029] 4A - Seal;

[0030] 410A - Sealing portion;

[0031] 420A - Auxiliary portion. Detailed implementation manners

[0032] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] It should be noted here that the upper and lower orientation words involved in this article are based on Figure 1The positions of the components in the figure and the positions of the components relative to each other are defined only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the directional words used herein should not limit the scope of protection claimed in this application.

[0034] Figure 1 Shown is a structural schematic diagram of a specific embodiment of the utility model; Figure 2 Shown Figure 1 A schematic diagram of a sealing member in Embodiment 1; Figure 3 Shown Figure 1 A schematic cross-sectional view of the valve core component; Figure 4 Shown Figure 1 A local enlarged schematic diagram of point I in the middle; Figure 5 Shown is a schematic diagram of the sealing member according to the second embodiment of the present application.

[0035] like Figure 1 , Figure 2 and Figure 3 As shown, the stop valve includes: an upper valve body component 1, a lower valve body component 2, a valve stem component 3, and a sealing member 4. The upper valve body component 1 and the lower valve body component 2 are detachably connected. Specifically, the upper valve body component 1 and the lower valve body component 2 are connected by threads, which can be easily installed and repaired. In the first embodiment, the sealing member 4 includes a sealing portion 410 and an auxiliary portion 420. One end face of the sealing portion 410 abuts against the upper valve body component 1, and the other end face of the sealing portion 410 abuts against the lower valve body component 2, so as to achieve the sealing between the upper valve body component 1 and the lower valve body component 2. The auxiliary portion 420 is located in the inner cavity of the stop valve, and the auxiliary portion 420 does not directly participate in the sealing between the upper valve body component 1 and the lower valve body component 2. The valve stem component 3 is at least partially located in the inner cavity of the stop valve, and the valve stem component 3 includes an expanded diameter portion 3212, which is located in the inner cavity of the stop valve. Along the longitudinal direction of the stop valve, the expanded diameter portion 3212 is located below the auxiliary portion 420, and the expanded diameter portion 3212 can abut against the auxiliary portion 420, that is, during the disassembly process of the upper valve body component 1 and the lower valve body component 2, when the valve stem component 3 moves axially upward, the expanded diameter portion 3212 can abut against the auxiliary portion 420 and drive the seal 4 to move upward until it is separated from the inner cavity of the stop valve. In this way, when the stop valve needs to replace the seal 4, the seal 4 is smoothly taken out at the same time as the upper valve body component 1 and the lower valve body component 2 are disassembled, which is convenient for replacing the seal 4 and improves the convenience of maintenance.

[0036] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the stop valve of the present application, the upper valve body component 1 includes an upper valve body 110, the lower valve body component 2 includes a lower valve body 210, the upper valve body 110 includes an external thread, the lower valve body 210 includes an internal thread, and the upper valve body 110 and the lower valve body 210 are connected by threads. The upper valve body 110 includes an upper abutment portion 1110, the upper abutment portion 1110 is annular, and the lower valve body 210 includes a lower abutment portion 2130, the lower abutment portion 2130 is annular. When the upper valve body 110 and the lower valve body 210 are screwed together, the upper abutment portion 1110 and the lower abutment portion 2130 abut against each other to limit the continued engagement of the threads. The stop valve of the present application is provided with a seal 4 between the upper abutment portion 1110 and the lower abutment portion 2130. The seal portion 410 and the auxiliary portion 420 are annular, one end face of the seal portion 410 abuts against the upper abutment portion 1110, and the other end face of the seal portion 410 abuts against the lower abutment portion 2130. The auxiliary portion 420 is formed by radially extending inward from the inner edge of the seal portion 410. The inner diameter of the auxiliary portion 420 is defined as R3, the inner ring diameter of the upper abutment portion 1110 is defined as R1, and the inner ring diameter of the lower abutment portion 2130 is defined as R2. Then R3 is smaller than R1, and R3 is smaller than R2. That is, in the longitudinal cross-sectional projection of the stop valve, the auxiliary portion 420 protrudes more toward the inner cavity of the stop valve relative to the upper abutment portion 1110, and the auxiliary portion 420 protrudes more toward the inner cavity of the stop valve relative to the lower abutment portion 2130.

[0037] Figure 5 This is a schematic diagram of the structure of the sealing member of Example 2 provided in the present application.

[0038] like Figure 5 As shown, the seal 4A of the second embodiment includes a sealing portion 410A and an auxiliary portion 420A. The difference from the seal 4 of the first embodiment is that the auxiliary portion 420A is a convex portion, the sealing portion 410A is annular, and the auxiliary portion 420A is formed by convexly protruding inward from the inner edge of the sealing portion 410A. There are at least two convex portions, which are evenly distributed along the circumference of the inner edge of the sealing portion 410A. The diameter of the inscribed circle formed by the convex point surfaces of the multiple convex portions is defined as R3'. In this scheme, the multiple convex portions The diameter of the inscribed circle formed by the convex surface of the upper part is also the inner diameter of the auxiliary part 420A. The inner ring diameter of the upper abutting part 1110 is defined as R1, and the inner ring diameter of the lower abutting part 2130 is defined as R2. Then R3' is smaller than R1, and R3' is smaller than R2. That is, in the longitudinal cross-sectional projection of the stop valve, the auxiliary part 420A protrudes more toward the inner cavity of the stop valve relative to the upper abutting part 1110, and the auxiliary part 420A protrudes more toward the inner cavity of the stop valve relative to the lower abutting part 2130.

[0039] Preferably, the upper valve body 110, the lower valve body 210, and the sealing gasket 4 are made of metal. Furthermore, the upper valve body 110 and the lower valve body 210 are made of metal, such as cast steel, carbon steel, etc., and the sealing gasket 4 is made of aluminum, such as aluminum, aluminum alloy, etc. The material hardness of steel is greater than the material hardness of aluminum, that is, the material hardness of the sealing gasket 4 is less than the material hardness of the upper valve body 110, and the material hardness of the sealing gasket 4 is less than the material hardness of the lower valve body 210. In this way, after the upper valve body 110 and the lower valve body 210 are threadedly fitted, the sealing gasket 4 is deformed by the extrusion force, which is conducive to improving the sealing effect and reducing the sealing torque.

[0040] like Figure 1 and Figure 3 As shown, the valve stem component 3 includes a valve stem 310 and a valve core component 320. The valve stem 310 is fixedly or positionally connected to the valve core component 320. The valve stem 310 is inserted into the upper valve body 110 and the valve stem 310 is threadedly connected to the upper valve body 110. The valve core component 320 includes a valve core 3210, and the valve core 3210 includes a barrel 3221 and an expanded diameter portion 3212. The outer diameter dimension of the expanded diameter portion 3212 is defined as B, and the outer diameter dimension of the barrel 3221 is defined as A. Then, B is greater than R3 is greater than A, that is, the inner diameter dimension of the auxiliary portion 420 is between the outer diameter of the barrel 3221 and the outer diameter of the expanded diameter portion 3212. The width of the sealing portion 410 is defined as B1, and the width of the auxiliary portion 420 is defined as B2. Then, B2 is less than B1, that is, the width B2 of the auxiliary portion 420 is less than the width B1 of the sealing portion 410. The auxiliary part 420 is also a part of the seal 4. The setting of the auxiliary part 420 increases the material width of the seal 4, which helps to improve the torsion resistance of the seal 4. Specifically, when the upper valve body 110 and the lower valve body 210 are screwed together, in order to achieve the sealing effect, it is necessary to set the torque. Under the action of the torque, the seal 4 is subjected to the extrusion force and shear force from the upper abutment part 1110 and the lower abutment part 2130. The seal 4 is at risk of breaking. The setting of the auxiliary part 420 can play an auxiliary role in strengthening the anti-extrusion and anti-shearing. When the stop valve is in the maximum valve opening state, the seal 4 is located at the periphery of the barrel 3221.

[0041] like Figure 1 As shown, the lower valve body 210 includes a first port 2110, a second port 2120, and a valve port 2140. The lower valve body 210 includes an internal thread, and the upper valve body 110 includes an external thread. The upper valve body 110 and the lower valve body 210 are detachably connected through threads. The valve stem 310 is threadedly connected to the upper valve body 110. Along the longitudinal direction of the stop valve, the valve stem 310 drives the valve core component 320 to move up and down through threaded transmission. When the valve core 3210 closes the valve port 2140, the first port 2110 is connected to the inner cavity of the stop valve, and the first port 2110 is not connected to the second port 2120.

[0042] The above is only an explanation of a specific embodiment of the present utility model. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present utility model. These improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A stop valve, characterized in that: include: An upper valve body component, a lower valve body component, a valve stem component, and a sealing component, wherein the upper valve body component and the lower valve body component are detachably connected, the sealing component comprises a sealing portion and an auxiliary portion, the upper valve body component comprises an upper abutting portion, and the lower valve body component comprises a lower abutting portion, one end face of the sealing portion abuts against the upper abutting portion, and the other end face of the sealing portion abuts against the lower abutting portion, the auxiliary portion is located in the inner cavity of the stop valve, and the valve stem component is at least partially located in the inner cavity of the stop valve, the valve stem component comprises an expanded diameter portion, and along the longitudinal direction of the stop valve, the expanded diameter portion is located below the auxiliary portion, and during the disassembly process of the upper valve body component and the lower valve body component, the expanded diameter portion can drive the sealing component to separate from the inner cavity of the stop valve.

2. The stop valve according to claim 1, characterized in that: The upper valve body component includes an upper valve body, and the lower valve body component includes a lower valve body. The upper valve body includes the upper abutting portion, and the lower valve body includes the lower abutting portion. The auxiliary portion is annular, and the sealing portion is annular. The auxiliary portion is formed by radially extending inward from the inner edge of the sealing portion. The upper abutting portion is annular, and the lower abutting portion is annular. The inner ring diameter of the upper abutting portion is defined as R1, the inner ring diameter of the lower abutting portion is defined as R2, and the inner diameter of the auxiliary portion is defined as R3, then: R3 is smaller than R1, and R3 is smaller than R2.

3. The stop valve according to claim 1, characterized in that: The upper valve body component includes an upper valve body, and the lower valve body component includes a lower valve body. The upper valve body includes the upper abutting portion, and the lower valve body includes the lower abutting portion. The sealing portion is annular, and the auxiliary portion is a convex portion. The auxiliary portion is formed by convexing inward from the inner edge of the sealing portion. There are at least two convex portions, and the diameter of the inscribed circle formed by the convex point surface of the convex portion is defined as R3'. The upper abutting portion is annular, and the lower abutting portion is annular. The inner ring diameter of the upper abutting portion is defined as R1, and the inner ring diameter of the lower abutting portion is defined as R2, then: R3' is smaller than R1, and R3' is smaller than R2.

4. The stop valve according to claim 2 or 3, characterized in that: The seal, the upper valve body and the lower valve body are made of metal. The hardness of the seal is less than that of the upper valve body, and the hardness of the seal is less than that of the lower valve body.

5. The stop valve according to claim 4, characterized in that: The upper valve body and the lower valve body are made of steel, and the sealing element is made of aluminum.

6. The stop valve according to claim 2 or 3, characterized in that: The valve stem component includes a valve stem and a valve core component. The valve stem is fixedly or positionally connected to the valve core component. The valve core component includes a valve core. The valve core includes a barrel and the expanded diameter portion. The outer diameter of the expanded diameter portion is larger than the outer diameter of the barrel. When the stop valve is in the maximum open state, the sealing component is located on the outer periphery of the barrel.

7. The stop valve according to claim 6, characterized in that: Define the outer diameter of the expanded portion as B, define the outer diameter of the barrel as A, and define the inner diameter of the auxiliary portion as R3, then B is greater than R3 is greater than A, define the width of the sealing portion as B1, and define the width of the auxiliary portion as B2, then B2 is less than B1.

8. The stop valve according to claim 7, characterized in that: The lower valve body includes a first port, a second port, and a valve port. The lower valve body includes an internal thread, and the upper valve body includes an external thread. The upper valve body is threadedly connected to the lower valve body, and the valve stem is threadedly connected to the upper valve body. Along the longitudinal direction of the stop valve, the valve stem drives the valve core component to move up and down through the thread. When the valve core closes the valve port, the first port is connected to the inner cavity of the stop valve, and the first port is not connected to the second port.

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