Stop valve

Abstract

The utility model provides a stop valve, and belongs to the technical field of valves. The stop valve solves the problem that due to the fact that an existing stop valve is not ideal in sealing effect, leakage happens to the stop valve. The stop valve comprises a valve body and a valve cover, a circulation pipeline is arranged in the valve body, a valve rod is arranged in the valve body, one end of the valve rod extends out of the valve body and is connected with a control switch, the other end of the valve rod is arranged in the circulation pipeline of the valve body and is fixedly provided with a valve element, and a first fixing ring and a second fixing ring are arranged in the valve body. A plurality of sliding rods are fixedly arranged on the first fixing ring, abutting parts abutting against the valve rod are arranged at the upper ends of the sliding rods, the sliding rods are all sleeved with reset springs, the reset springs are arranged between the abutting parts and the first fixing ring, and an open groove is formed in the upper end of the second fixing ring. And sealing parts are arranged at the lower ends of the sliding rods. The sealing structure has the advantage of being good in sealing performance.

Description

Technical Field

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

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and adjust and control the parameters (temperature, pressure and flow) of the conveying medium. According to their functions, they can be divided into shut-off valves, check valves, regulating valves, etc. Valves are control components in fluid conveying systems, and have functions such as shut-off, regulation, diversion, prevention of backflow, pressure stabilization, diversion or overflow pressure relief. Valves used in fluid control systems have a wide variety of varieties and specifications, from the simplest shut-off valves to various valves used in extremely complex automatic control systems.

[0003] The stop valve is a type of valve in the field. However, the traditional stop valve has a poor sealing effect, which leads to leakage in the stop valve, making it unable to fully play its role, greatly reducing the practicality of the stop valve. Summary of the invention

[0004] The utility model aims to provide a stop valve with good sealing performance in view of the above problems existing in the prior art.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a stop valve, comprising a valve body and a valve cover, the valve body having a flow channel for liquid circulation, the valve body being provided with a valve stem for controlling the flow channel, one end of the valve stem extending out of the valve body and connected to a control switch, the other end of the valve stem being arranged in the flow channel of the valve body and fixedly provided with a valve core, characterized in that a fixing ring 1 and a fixing ring 2 are arranged in the valve body and relative to the flow channel, the fixing ring 1 is arranged at the upper end of the fixing ring 2, a plurality of sliding rods are fixedly arranged on the fixing ring 1, and the plurality of sliding rods can slide up and down on the fixing ring 1, the upper end of the sliding rod is provided with a supporting portion that abuts against the valve stem, a plurality of the sliding rods are sleeved with a return spring, the return spring is arranged between the abutting portion and the fixing ring 1, the upper end of the fixing ring 2 is provided with a groove, and the lower ends of the plurality of the sliding rods are provided with a sealing portion that matches the groove.

[0006] In the above-mentioned stop valve, the fixing ring 1 is provided with a water hole 1 for passing water, and the fixing ring 2 is provided with a plurality of water holes 2 for passing water.

[0007] In the above-mentioned stop valve, the valve cover and the valve body are detachably fixedly connected by bolts, a step portion is provided at the lower end of the valve cover, a step groove matching the step portion is provided at the upper end of the valve body and at the connection relative to the valve cover, and a sealing cover plate for sealing is provided between the valve cover and the valve body.

[0008] Compared with the prior art, the stop valve has a sealing portion disposed at the flow pipe of the valve body. When the valve body is closed, the sealing portion simultaneously seals the flow pipe, thereby enhancing the sealing effect of the valve body when it is closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a cross-sectional structural schematic diagram of the utility model.

[0010] In the figure, 1. valve body; 2. valve cover; 3. circulation pipe; 4. valve stem; 5. valve core; 6. fixing ring 1; 7. fixing ring 2; 8. sliding rod; 9. abutment part; 10. return spring; 11. slot; 12. sealing part; 13. water hole 1; 14. water hole 2; 15. step part; 16. sealing cover plate. DETAILED DESCRIPTION

[0011] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0012] like Figure 1 As shown, the stop valve comprises a valve body 1 and a valve cover 2. The valve body 1 has a flow pipe 3 for liquid circulation inside. The valve body 1 is provided with a valve stem 4 for controlling the flow pipe 3. One end of the valve stem 4 extends out of the valve body 1 and is connected to a control switch. The other end of the valve stem 4 is arranged in the flow pipe 3 of the valve body 1 and is fixedly provided with a valve core. A fixing ring 1 6 and a fixing ring 2 7 are arranged in the valve body 1 and relative to the flow pipe 3. The fixing ring 1 6 is arranged at the upper end of the fixing ring 2 7. A plurality of sliding rods 8 are fixedly provided on the fixing ring 1 6, and the plurality of sliding rods 8 can slide up and down on the fixing ring 1 6. An abutting portion 9 abutting against the valve stem 4 is provided on the upper end of the sliding rod 8. Reset springs 10 are sleeved on the plurality of sliding rods 8. The reset spring 10 is arranged between the abutting portion 9 and the fixing ring 1 6. A slot 11 is provided at the upper end of the fixing ring 2 7. The lower ends of the plurality of sliding rods 8 are provided with sealing portions 12 that match the slots 11 .

[0013] To elaborate further, the up and down movement of the sealing portion 12 is synchronized with the valve stem 4 of the valve body 1. When the internal circulation pipeline 3 is in a closed state, the valve core on the valve stem 4 abuts against each abutment portion 9, causing the sliding rod 8 to move downward, and the return spring 10 is in a compressed state. The sealing portion 12 corresponds to the groove 11 on the fixing ring 7, thereby closing the water hole 14 and enhancing the sealing inside the valve body 1. When the internal circulation pipeline 3 is in an open state, the valve stem 4 moves upward, the return spring 10 rebounds, and the sliding rod 8 moves upward, thereby opening the water hole 14.

[0014] To be more specific, the fixing ring 1 6 is provided with a water hole 13 for passing water, and the fixing ring 2 7 is provided with a plurality of water holes 14 for passing water.

[0015] In further detail, the valve cover 2 and the valve body 1 are detachably fixedly connected by bolts, a step portion 15 is provided at the lower end of the valve cover 2, a step groove matching the step portion 15 is provided at the upper end of the valve body 1 and at the connection relative to the valve cover 2, and a sealing cover plate 16 for sealing is provided between the valve cover 2 and the valve body 1. The provision of the sealing plate and the matching provision of the step portion 15 and the step groove enhance the sealing between the valve body 1 and the valve cover 2.

[0016] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0017] Although the terms such as valve body 1, valve cover 2, flow pipe 3, valve stem 4, valve core, fixing ring 1 6, fixing ring 2 7, sliding rod 8, abutment 9, return spring 10, slot 11, sealing part 12, water hole 1 13, water hole 2 14, step 15, sealing cover plate 16 are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A stop valve, comprising a valve body (1) and a valve cover (2), wherein the valve body (1) has a flow pipe (3) for liquid flow therein, and a valve stem (4) for controlling the flow pipe (3) is arranged in the valve body (1), one end of the valve stem (4) extends out of the valve body (1) and is connected to a control switch, and the other end of the valve stem (4) is arranged in the flow pipe (3) of the valve body (1) and is fixedly provided with a valve core (5), characterized in that: A fixing ring 1 (6) and a fixing ring 2 (7) are arranged in the valve body (1) and relative to the flow pipe (3); the fixing ring 1 (6) is arranged at the upper end of the fixing ring 2 (7); a plurality of sliding rods (8) are fixedly arranged on the fixing ring 1 (6), and the plurality of sliding rods (8) can slide up and down on the fixing ring 1 (6); a supporting portion (9) abutting against the valve stem (4) is arranged at the upper end of the sliding rod (8); a return spring (10) is sleeved on the plurality of sliding rods (8); the return spring (10) is arranged between the supporting portion (9) and the fixing ring 1 (6); a groove (11) is provided at the upper end of the fixing ring 2 (7); and a sealing portion (12) matching the groove (11) is provided at the lower end of the plurality of sliding rods (8).

2. A stop valve according to claim 1, characterized in that: The fixing ring 1 (6) is provided with a water hole 1 (13) for passing water, and the fixing ring 2 (7) is provided with a plurality of water holes 2 (14) for passing water.

3. A stop valve according to claim 1, characterized in that: The valve cover (2) and the valve body (1) are detachably fixedly connected by bolts, the lower end of the valve cover (2) is provided with a stepped portion (15), the upper end of the valve body (1) and a connection relative to the valve cover (2) are provided with a stepped groove matching the stepped portion (15), and a sealing cover plate (16) for sealing is provided between the valve cover (2) and the valve body (1).

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