Stop valve with good sealing performance

Abstract

The utility model provides a stop valve with good sealing performance, and belongs to the technical field of valves. The stop valve solves the problems that an existing stop valve is single in sealing structure, and multiple sealing use of the existing stop valve is inconvenient. The stop valve with the good sealing performance comprises a valve body and a valve rod, a water inlet pipeline used for water inflow and a water outlet pipeline used for water outflow are arranged in the valve body, a valve deck is arranged at the upper end of the valve body, a water passing part is arranged in the valve body and located at the joint of the water inlet pipeline and the water outlet pipeline, and a valve element is arranged at the lower end of the valve rod. The upper end and the lower end of the water passing part are each provided with a plurality of water passing holes used for water passing, the water passing part is provided with a sealing assembly used for double sealing, the sealing assembly comprises a first sealing part, a second sealing part, a sliding rod and a reset spring, and the first sealing part is arranged at the upper end of the water passing part. The utility model has the advantage of double-sealing effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, relates to a globe valve, and particularly relates to a globe valve with good sealing performance. Background Art

[0002] The opening and closing member of a high-pressure globe valve is a plug-shaped valve flap, the sealing surface is a plane or a conical surface, the valve flap moves linearly along the center line of the fluid, and the movement form of the valve stem has a lifting rod type (the valve stem lifts and the handwheel does not lift), and there is also a lifting and rotating rod type (the handwheel rotates and lifts together with the valve stem, and the nut is arranged on the valve body). The globe valve is only suitable for fully open and fully closed, and does not allow adjustment and throttling.

[0003] In the prior art, the sealing structure of the globe valve is not convenient for multiple seals. It usually uses a valve core for sealing, but its sealing structure is relatively single, not convenient for multiple seals, and thus cannot ensure its long-term and stable sealing performance, resulting in inconvenience in use. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a globe valve with a double sealing effect and good sealing performance for the above problems existing in the prior art.

[0005] The purpose of the utility model can be achieved by the following technical solutions: A globe valve with good sealing performance includes a valve body and a valve stem. An inlet pipe for water inlet and an outlet pipe for water outlet are arranged in the valve body. It is characterized in that a valve cover is arranged at the upper end of the valve body, a water passing part is arranged at the junction of the inlet pipe and the outlet pipe in the valve body, a valve core is arranged at the lower end of the valve stem, a plurality of water passing holes for water passing are opened at both the upper and lower ends of the water passing part, and a sealing component for double sealing is arranged on the water passing part. The sealing component includes a first sealing part, a second sealing part, a sliding rod and a return spring. The first sealing part is arranged at the upper end of the water passing part, the second sealing part is arranged in the water passing part, both the first sealing part and the second sealing part are arranged on the sliding rod, and both move up and down in the water passing part through the return spring.

[0006] In the above globe valve with good sealing performance, an installation groove for installing the return spring is opened in the water passing part.

[0007] In the above globe valve with good sealing performance, the diameter of the first sealing part is larger than that of the second sealing part.

[0008] In the above globe valve with good sealing performance, a control hand rod for controlling the valve core is connected to the upper end of the valve stem.

[0009] Compared with the prior art, the globe valve with good sealing performance double-seals the water passing part through a sealing structure, improving the overall sealing effect of the valve. Description of the Drawings

[0010] Figure 1 is a schematic structural diagram of the present utility model.

[0011] In the figure, 1 is the valve body; 2 is the valve stem; 3 is the valve cover; 4 is the water passing part; 5 is the valve core; 6 is the water passing hole; 7 is the first sealing part; 8 is the second sealing part; 9 is the sliding rod; 10 is the return spring; 11 is the control lever. Detailed Embodiment

[0012] The following are specific embodiments of the present utility model and in conjunction with the drawings, the technical solutions of the present utility model will be further described, but the present utility model is not limited to these embodiments.

[0013] As Figure 1 shown, the globe valve with good sealing performance includes a valve body 1 and a valve stem 2. An inlet pipe for water inlet and an outlet pipe for water outlet are provided inside the valve body 1. A valve cover 3 is provided at the upper end of the valve body 1, and the valve cover 3 is fixedly installed on the valve body 1 through fixing bolts. A water passing part 4 is provided inside the valve body 1 and at the junction of the inlet pipe and the outlet pipe. A valve core 5 is provided at the lower end of the valve stem 2. A plurality of water passing holes 6 for water passing are opened at both the upper and lower ends of the water passing part 4. A sealing assembly for double sealing is provided on the water passing part 4. The sealing assembly includes a first sealing part 7, a second sealing part 8, a sliding rod 9 and a return spring 10. The first sealing part 7 is provided at the upper end of the water passing part 4. The second sealing part 8 is provided inside the water passing part 4. Both the first sealing part 7 and the second sealing part 8 are provided on the sliding rod 9, and both of them move up and down inside the water passing part 4 through the return spring 10.

[0014] Further elaborating, when the inside of the valve is in the closed state, the valve core 5 abuts against the upper end part of the first sealing part 7, and the lower end part of the first sealing part 7 is in contact with the upper end part of the water passing part 4, closing the water passing holes 6 at the upper end part of the water passing part 4. At the same time, the return spring 10 is in a compressed state. The downward movement of the first sealing part 7 drives the second sealing part 8 to move downward and be in contact with the water passing part 4, closing the water passing holes 6 at the lower end part of the water passing part 4, having a double-sealing effect. When the inside of the valve needs to be in the open state, rotate the control lever 11 to make the valve core 5 move upward, and the return spring 10 rebounds, thereby pushing the first sealing part 7 and the second sealing part 8 upward, and the water passing holes 6 of the water passing part 4 are in the open state.

[0015] Further elaborating, an installation groove for installing the return spring 10 is provided inside the water passing part 4.

[0016] Specifically, the diameter of the first sealing part 7 is larger than that of the second sealing part 8.

[0017] Specifically, a control lever 11 for controlling the valve core 5 is connected to the upper end of the valve stem 2.

[0018] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains may make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

[0019] Although terms such as valve body 1, valve stem 2, valve cover 3, water passage part 4, valve core 5, water passage hole 6, first sealing part 7, second sealing part 8, sliding rod 9, return spring 10, control lever 11, etc. are used more frequently herein, the possibility of using other terms is not excluded. The use of these terms is only for more conveniently describing and explaining the essence of the present utility model; interpreting them as any additional limitation is contrary to the spirit of the present utility model.

Claims

1. A stop valve with good sealing performance, comprising a valve body (1) and a valve stem (2), wherein the valve body (1) is provided with a water inlet pipe for water inlet and a water outlet pipe for water outlet, characterized in that: A valve cover (3) is provided at the upper end of the valve body (1), a water flow portion (4) is provided inside the valve body (1) and at the junction of the water inlet pipe and the water outlet pipe, a valve core (5) is provided at the lower end of the valve stem (2), a plurality of water flow holes (6) for water flow are provided at both the upper and lower ends of the water flow portion (4), a sealing component for double sealing is provided on the water flow portion (4), the sealing component comprises a sealing portion 1 (7), a sealing portion 2 (8), a sliding rod (9) and a reset spring (10), the sealing portion 1 (7) is provided at the upper end of the water flow portion (4), the sealing portion 2 (8) is provided in the water flow portion (4), the sealing portion 1 (7) and the sealing portion 2 (8) are both provided on the sliding rod (9), and both are moved up and down in the water flow portion (4) through the reset spring (10).

2. A stop valve with good sealing performance according to claim 1, characterized in that: The water passing portion (4) is provided with an installation groove for installing a reset spring (10).

3. A stop valve with good sealing performance according to claim 1, characterized in that: The diameter of the sealing part 1 (7) is greater than the diameter of the sealing part 2 (8).

4. A stop valve with good sealing performance according to claim 1, characterized in that: The upper end of the valve stem (2) is connected to a control handle (11) for controlling the valve core (5).

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