Stop valve

Abstract

The embodiment of the utility model provides a stop valve. The stop valve comprises a valve body, a valve rod, a connecting piece and a first sealing piece. The valve body is provided with an opening and an outlet. The first end of the valve rod is arranged in the valve body. The connecting piece is arranged in the valve body and connected to the valve body, the connecting piece is provided with a threaded hole, the valve rod is provided with a first external thread, and the valve rod penetrates through the threaded hole and is in threaded connection with the connecting piece. The first sealing piece is arranged at the opening and connected with the valve body in a sealed mode, the first sealing piece is provided with an inlet, and the valve rod can be close to or away from the first sealing piece so that the inlet and the outlet can be communicated or separated through the valve rod. The stop valve is simple in structure, low in cost and convenient to assemble.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a gate valve. Background Technology

[0002] Valves play a crucial role in cutting off and throttling the medium in their respective pipelines. Gate valves, as key shut-off valves in pipeline systems, are widely used in industrial fluid control, their core function being to reliably cut off and precisely throttle the medium. However, existing gate valves suffer from complex structures, high production costs, and complicated assembly. For example, current products often employ multi-layer sealing components and linkage mechanisms, achieving sealing through independent valve seats, multi-stage guide sleeves, and auxiliary locking devices, resulting in an excessive number of internal components. This complex structure not only increases the difficulty of precision machining but also significantly raises the cost of valve body casting, especially in the manufacture of small-diameter valves where economic disadvantages are evident. Traditional valve assembly requires precise alignment of the valve stem, valve disc, and valve seat, relying on a stepped press-fitting of multiple sealing rings.

[0003] Therefore, a gate valve with a simple structure, low cost, and easy assembly is needed to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this utility model is to provide a shut-off valve that has a simple structure, low cost and is easy to assemble.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A shut-off valve, comprising:

[0007] The valve body is provided with an opening and an outlet;

[0008] A valve stem, the first end of which is disposed within the valve body;

[0009] A connector is disposed inside the valve body and connected to the valve body. The connector has a threaded hole, and the valve stem has a first external thread. The valve stem passes through the threaded hole and is screwed to the connector.

[0010] A first seal is disposed at the opening and is sealed to the valve body. The first seal has an inlet. The valve stem can move closer to or further away from the first seal so that the valve stem can connect or disconnect the inlet from the outlet.

[0011] In some embodiments, the shut-off valve further includes a support member and a receiving member. The support member is disposed within the valve body, and the receiving member is disposed between the support member and the valve body. The receiving member has a clearance hole. The support member is disposed between the first sealing member and the connecting member. The valve body has a limiting portion. One end of the support member abuts against the connecting member, and the other end of the support member abuts against the limiting portion. The support member has a channel that communicates with the inlet and the outlet.

[0012] In some embodiments, the support member is sealed to the valve body.

[0013] In some embodiments, a sealing groove is provided on the periphery of the end of the support member away from the first sealing member, and the second sealing member is disposed in the sealing groove.

[0014] In some embodiments, the valve stem is sealed to the support member.

[0015] In some embodiments, a third seal is provided between the valve stem and the support member, the third seal being disposed around the valve stem.

[0016] In some embodiments, the shut-off valve further includes a handwheel connected to a second end of the valve stem.

[0017] In some embodiments, the handwheel is provided with a connecting hole, the second end of the valve stem passes through the connecting hole, the valve stem is provided with a shoulder, the second end of the valve stem is provided with a second external thread, a fastener is screwed to the second end of the valve stem, and the fastener and the shoulder connect the handwheel to the second end of the valve stem.

[0018] In some embodiments, the connecting hole is a countersunk hole, and the fastener is disposed in the countersunk hole.

[0019] In some embodiments, the first seal has a beveled end away from the connector, the beveled end forming a receiving groove with the inner wall of the valve body, a fourth seal is provided in the receiving groove, and the surface of the fourth seal is flush with or protrudes from the end face of the valve body.

[0020] The beneficial effects of this utility model are:

[0021] This utility model provides a gate valve, which includes a valve body, a valve stem, a connector, and a first sealing element. The valve body has an opening and an outlet. The opening is fitted with the first sealing element. The first sealing element is sealed to the valve body. The first sealing element has an opening. The connector is disposed inside the valve body and connected to the valve body. The connector has a threaded hole. The first end of the valve stem is disposed inside the valve body and has a first external thread. The valve stem can be screwed into the internal thread of the connector through the first external thread, realizing the movement of the valve stem inside the valve body, allowing the valve stem to move closer to or further away from the first sealing element, thereby connecting or disconnecting the inlet and outlet. Therefore, this gate valve has a simple structure, low cost, and is easy to assemble. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of a shut-off valve according to an embodiment of the present invention.

[0023] In the picture:

[0024] 10. Valve body; 101. Opening; 102. Outlet; 103. Limiting part; 104. End face;

[0025] 20. Valve stem; 201. First external thread; 202. Shoulder; 203. Second external thread;

[0026] 30. Connecting parts; 301. Threaded holes;

[0027] 40. First seal; 401. Inlet; 402. Inclined surface;

[0028] 50. Support component; 501. Channel; 502. Sealing groove;

[0029] 60. Second sealing element;

[0030] 70. Third sealing element;

[0031] 80. Handwheel;

[0032] 90. Fasteners;

[0033] 11. Receiving tank;

[0034] 12. Fourth sealing element. Detailed Implementation

[0035] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0036] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature 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 includes the first feature 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.

[0038] This utility model provides a shut-off valve, including a valve body 10, a valve stem 20, a connector 30, and a first sealing element 40. The valve body 10 has an opening 101 and an outlet 102. The first end of the valve stem 20 is disposed inside the valve body 10. The connector 30 is disposed inside the valve body 10 and connected to the valve body 10. The connector 30 has a threaded hole 301. The valve stem 20 has a first external thread 201, passes through the threaded hole 301, and is screwed to the connector 30. The first sealing element 40 is disposed in the opening 101 and is sealed to the valve body 10. The first sealing element 40 has an inlet 401. The valve stem 20 can move closer to or further away from the first sealing element 40 so that the valve stem 20 can connect or disconnect the inlet 401 from the outlet 102.

[0039] The valve body 10 has a hollow structure, and the valve stem 20, connecting piece 30, and first sealing piece 40 are all located inside the valve body 10. The valve body 10 can be a cylindrical structure. The valve body 10 is a metal structure.

[0040] The valve stem 20 may be a stepped shaft structure. The valve stem 20 is a metal structure. Optionally, the axis of the valve stem 20 coincides with the axis of the valve body 10.

[0041] The connector 30 is connected to the valve body 10, and the connection can be either a fixed connection or a detachable connection. The fixed connection can be welded or bonded. The detachable connection can be screwed or snap-fitted. Optionally, the connector 30 is welded to the valve body 10.

[0042] The first sealing element 40 is a plastic structure.

[0043] The gate valve provided by this utility model includes a valve body 10, a valve stem 20, a connecting member 30, and a first sealing member 40. The valve body 10 has an opening 101 and an outlet 102. The opening 101 is fitted with the first sealing member 40. The first sealing member 40 is sealed to the valve body 10. The first sealing member 40 has the opening 101. The connecting member 30 is disposed inside the valve body 10 and connected to it. The connecting member 30 has a threaded hole 301. The first end of the valve stem 20 is disposed inside the valve body 10, and the valve stem 20 has a first external thread 201. The valve stem 20 can be screwed into the internal thread of the connecting member 30 through the first external thread 201, allowing the valve stem 20 to move inside the valve body 10, enabling the valve stem 20 to move closer to or further away from the first sealing member 40, thus connecting or disconnecting the inlet 401 and the outlet 102. Therefore, this gate valve has a simple structure, low cost, and is easy to assemble.

[0044] In some embodiments, the shut-off valve further includes a support member 50 disposed within the valve body 10 and between the first seal 40 and the connector 30. The valve body 10 is provided with a limiting portion 103. One end of the support member 50 abuts against the connector 30, and the other end of the support member 50 abuts against the limiting portion 103. The support member 50 is provided with a channel 501, which communicates with the inlet 401 and the outlet 102. By disposing the support member 50 inside the valve body 10 and between the first seal 40 and the connector 30, and providing a channel 501 on the support member 50, the valve stem 20 is moved close to the first seal 40 and sealed to it. The medium cannot enter the channel 501 on the support member 50 through the inlet 401 on the first seal 40, thus isolating the inlet 401 from the outlet 102, thereby achieving the shut-off valve cutting off the flow of the medium. As the valve stem 20 moves away from the first seal 40, it disengages from the first seal 40. The medium can then enter the channel 501 on the support 50 through the inlet 401 on the first seal 40, flow from the channel 501 on the support 50 into the housing, and then flow from the clearance hole on the housing to the outlet 102 on the valve body 10. By providing a limiting part 103 on the valve body 10, one end of the support 50 abuts against the connecting member 30, and the other end of the support 50 abuts against the limiting part 103, the support 50 is limited, preventing it from moving within the valve body 10.

[0045] The support member 50 can be made of metal.

[0046] In some embodiments, the support member 50 is sealed to the valve body 10. By providing a sealed connection between the support member 50 and the valve body 10, the medium is prevented from entering the valve body 10 from the inlet 401 of the first seal member 40 and then flowing out from other parts of the valve body 10.

[0047] In some embodiments, a sealing groove 502 is provided on the periphery of the end of the support member 50 away from the first seal member 40, and the second seal member 60 is disposed within the sealing groove 502. By providing a sealing groove 502 on the periphery of the end of the support member 50 away from the first seal member 40 and disposing the second seal member 60 within the sealing groove 502, a seal is achieved between the support member 50 and the valve body 10. This arrangement has a simple structure and good sealing effect.

[0048] Optionally, the second seal 60 is a rubber structure.

[0049] Optionally, the second seal 60 is an O-ring.

[0050] In some embodiments, the valve stem 20 is sealed to the support member 50. By providing a sealed connection between the valve stem 20 and the support member 50, the medium is prevented from entering the valve body 10 from the inlet 401 of the first seal member 40 and then flowing out through the mating gap between the valve stem 20 and the support member 50.

[0051] In some embodiments, a third sealing element 70 is provided between the valve stem 20 and the support member 50, and the third sealing element 70 surrounds the valve stem 20. By providing the third sealing element 70 between the valve stem 20 and the support member 50, and by sleeve the third sealing element 70 on the valve stem 20, a sealed connection between the valve stem 20 and the support member 50 is achieved. This arrangement has a simple structure and a good sealing effect.

[0052] Optionally, the third seal 70 is a rubber structure.

[0053] Optionally, the third seal 70 is an O-ring.

[0054] In some embodiments, the shut-off valve further includes a handwheel 80, which is connected to the second end of the valve stem 20. By providing the handwheel 80 and connecting it to the second end of the valve stem 20, the valve stem 20 can be moved closer to or further away from the first seal 40, making operation convenient.

[0055] The handwheel 80 can be cylindrical or polygonal. Optionally, the handwheel 80 is cylindrical.

[0056] In some embodiments, the handwheel 80 is provided with a connecting hole, the second end of the valve stem 20 passes through the connecting hole, the valve stem 20 is provided with a shoulder 202, and the second end of the valve stem 20 is provided with a second external thread 203. A fastener 90 is screwed to the second end of the valve stem 20, and the fastener 90 and the shoulder 202 connect the handwheel 80 to the second end of the valve stem 20. By providing a connecting hole on the handwheel 80, allowing the second end of the valve stem 20 to pass through the connecting hole, providing a second external thread 203 at the second end of the valve stem 20, and providing a shoulder 202 on the valve stem 20, the fastener 90 and the shoulder 202 connect the handwheel 80 to the second end of the valve stem 20, resulting in a simple structure and a firm connection.

[0057] Optionally, fastener 90 is a nut.

[0058] In some embodiments, the connecting hole is a countersunk hole, and the fastener 90 is disposed within the countersunk hole. By making the connecting hole a countersunk hole, the fastener 90 can be disposed within the countersunk hole, reducing the overall size.

[0059] In some embodiments, the first sealing member 40 has a bevel 402 at the end away from the connector 30. The bevel 402 and the inner wall of the valve body 10 form a receiving groove 11. A fourth sealing member is disposed in the receiving groove 11. The surface of the fourth sealing member is flush with or protrudes from the end face 104 of the valve body 10. By providing a bevel 402 at the end of the first sealing member 40 away from the connector 30, the bevel 402 and the inner wall of the valve body 10 can form a receiving groove 11. The fourth sealing member is disposed in the receiving groove 11, and the surface of the fourth sealing member is flush with or protrudes from the end face 104 of the valve body 10. This allows for a sealed connection between the valve body 10 and an external device when the valve body 10 is connected.

[0060] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A shut-off valve, characterized in that, include: The valve body (10) is provided with an opening (101) and an outlet (102). The valve stem (20) has its first end disposed inside the valve body (10); A connector (30) is disposed inside the valve body (10). The connector (30) is connected to the valve body (10). The connector (30) is provided with a threaded hole (301). The valve stem (20) is provided with a first external thread (201). The valve stem (20) passes through the threaded hole (301) and is screwed to the connector (30). A first sealing element (40) is disposed at the opening (101) and is sealed to the valve body (10). The first sealing element (40) is provided with an inlet (401). The valve stem (20) can approach or move away from the first sealing element (40) so that the valve stem (20) can connect or disconnect the inlet (401) from the outlet (102). The shut-off valve further includes a support member (50) and a receiving member. The support member (50) is disposed inside the valve body (10), and the receiving member is disposed between the support member (50) and the valve body (10). The receiving member is provided with a clearance hole. The support member (50) is disposed between the first sealing member (40) and the connecting member (30). The valve body (10) is provided with a limiting part (103). One end of the support member (50) abuts against the connecting member (30), and the other end of the support member (50) abuts against the limiting part (103). The support member (50) is provided with a channel (501), and the channel (501) communicates with the inlet (401) and the outlet (102).

2. The shut-off valve according to claim 1, characterized in that, The support (50) is sealed to the valve body (10).

3. The shut-off valve according to claim 2, characterized in that, The support member (50) has a sealing groove (502) on its periphery at the end away from the first sealing member (40), and the second sealing member (60) is disposed in the sealing groove (502).

4. The shut-off valve according to claim 3, characterized in that, The valve stem (20) is sealed to the support member (50).

5. The shut-off valve according to claim 4, characterized in that, A third sealing element (7) is provided between the valve stem (20) and the support member (50), and the third sealing element (7) surrounds the valve stem (20).

6. The shut-off valve according to claim 1, characterized in that, The shut-off valve also includes a handwheel (80) connected to the second end of the valve stem (20).

7. The shut-off valve according to claim 6, characterized in that, The handwheel (80) is provided with a connecting hole, the second end of the valve stem (20) passes through the connecting hole, the valve stem (20) is provided with a shoulder (202), the second end of the valve stem (20) is provided with a second external thread (203), the fastener (90) is screwed to the second end of the valve stem (20), and the fastener (90) and the shoulder (202) connect the handwheel (80) to the second end of the valve stem (20).

8. The shut-off valve according to claim 7, characterized in that, The connecting hole is a countersunk hole, and the fastener (90) is disposed in the countersunk hole.

9. The shut-off valve according to claim 1, characterized in that, The first sealing member (40) has a bevel (403) at one end away from the connector (30). The bevel (403) and the inner wall of the valve body (10) form a receiving groove (11). A fourth sealing member (12) is provided in the receiving groove (11). The surface of the fourth sealing member (12) is flush with or protrudes from the end face (104) of the valve body (10).

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