A Y-type self-sealing stop valve

Abstract

The utility model discloses a Y-type self-sealing stop valve, comprising a valve body, a valve disc arranged inside the valve body, a valve stem connected to the valve disc, and a valve cover arranged on the valve body, wherein the valve stem passes through the valve cover, a guide hole matched with the valve stem is penetrated and opened at the axis of the valve cover, a locking plate for locking the valve cover is arranged above the valve body, and a filler extending into the guide hole is arranged on the lower surface of the locking plate; the utility model limits the valve cover at the top of the valve body through the locking plate, and an elastic filler extending into the guide hole is arranged on the lower surface of the locking plate, when the valve stem drives the valve disc to move upward along the guide hole, the valve opens, and the valve disc squeezes the valve cover under the thrust of the medium at the inlet, and under the extrusion of the valve cover, the filler is deformed to seal the gap between the valve stem and the valve cover, thereby playing a role of automatic sealing, and the more the thrust of the medium, the better the sealing performance.

Description

Technical Field

[0001] The utility model relates to the technical field of stop valves, in particular to a Y-type self-sealing stop valve. Background Art

[0002] The stop valve is a valve that moves along the center line of the valve seat through the valve disc. Its opening and closing parts are plug-shaped valve discs, and the sealing surface is flat or conical. Due to this special movement of the valve disc, the opening of the valve seat is proportional to the valve disc, which is very suitable for regulating the flow rate. The stop valve has a short opening and closing stroke, a simple structure, good manufacturing process, and a wide range of applications;

[0003] Although there are many types of stop valves on the market, their sealing performance is poor when they operate for a long time in an environment with large fluid resistance, and their sealing performance cannot be guaranteed under high resistance. Therefore, the present application proposes a Y-type self-sealing stop valve. Summary of the invention

[0004] The utility model aims to provide a Y-type self-sealing stop valve to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a Y-type self-sealing stop valve, comprising a valve body, a valve disc arranged inside the valve body, a valve stem connected to the valve disc, and a valve cover arranged on the valve body, wherein the valve stem passes through the valve cover, a guide hole matching with the valve stem is opened through the axis of the valve cover, a locking plate for locking the valve cover is arranged above the valve body, and a packing extending into the guide hole is arranged on the lower surface of the locking plate;

[0006] When the valve stem drives the valve disc to move upward along the guide hole, the valve opens, and the valve disc squeezes the valve cover under the thrust of the medium at the inlet. Under the squeezing of the valve cover, the packing is deformed to seal the gap between the valve stem and the valve cover, thereby playing a sealing role.

[0007] Wherein, an inlet end for receiving fluid is arranged on one side of the valve body, and an outlet end for delivering fluid is arranged on the other side of the valve body, and the inlet end, the outlet end and the valve stem form a Y-shaped flow channel.

[0008] Wherein, the valve cover is arranged on the top of the valve body, and one end of the valve cover extends into the valve body.

[0009] Wherein, a sealing ring is provided at the joint between the valve cover and the valve body.

[0010] A stud is provided between the locking plate and the valve body, a nut is threadedly installed on the end of the stud, and the locking plate is installed above the valve body through the cooperation of the stud and the nut.

[0011] Wherein, the filler is made of rubber.

[0012] It also includes a top flange, a support is fixedly connected between the top flange and the valve body, a linear pneumatic valve actuator is provided on the top flange, an output end of the linear pneumatic valve actuator is connected to the valve stem, and the linear pneumatic valve actuator is used to drive the valve stem to move.

[0013] Wherein, a sealing ring cooperating with the valve disc is provided at the valve opening inside the valve body, and the valve disc and the sealing ring are interference fit.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model limits the valve cover at the top of the valve body by a locking plate, and an elastic filler extending into the guide hole is provided on the lower surface of the locking plate. When the valve stem drives the valve disc to move upward along the guide hole, the valve opens, and the valve disc squeezes the valve cover under the thrust of the medium at the inlet. Under the squeezing of the valve cover, the filler is deformed to seal the gap between the valve stem and the valve cover, thereby achieving an automatic sealing effect. The more the thrust of the medium, the better the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the main cross-sectional structure of the utility model.

[0017] In the figure: 1. valve body; 2. valve disc; 3. valve stem; 4. valve cover; 5. sealing ring; 6. packing; 7. stud; 8. nut; 9. support; 10. top flange. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] See also Figure 1The utility model provides a technical solution: a Y-type self-sealing stop valve, comprising a valve body 1, a valve disc 2 arranged inside the valve body 1, a valve stem 3 connected to the valve disc 2, and a valve cover 4 arranged on the valve body 1, wherein the valve stem 3 passes through the valve cover 4, and a guide hole matching the valve stem 3 is provided at the axis of the valve cover 4, and a locking plate for locking the valve cover 4 is provided above the valve body 1, and a packing 6 extending into the guide hole is provided on the lower surface of the locking plate. A packing cavity for accommodating the packing 6 is provided in the guide hole, and a protrusion contacting the packing 6 is provided on the valve stem 3. When the valve stem 3 moves downward, the protrusion on the valve stem 3 does not contact the packing 6, so as to ensure that the valve stem 3 can move downward normally. When the valve stem 3 moves upward, the protrusion on the valve stem 3 contacts the packing 6, and then squeezes the packing 6. Since the packing 6 is made of rubber, the packing 6 is elastic. When the packing 6 is squeezed, the packing 6 is deformed to block the gap between the valve stem 3 and the valve cover 4, so as to play the role of automatic sealing. The more the thrust of the medium, the better the sealing performance.

[0020] When the valve stem 3 drives the valve disc 2 to move upward along the guide hole, the valve opens, and the valve disc 2 squeezes the valve cover 4 under the thrust of the medium at the inlet. Under the squeezing effect of the valve cover 4, the packing 6 deforms to block the gap between the valve stem 3 and the valve cover 4, thus playing a sealing role.

[0021] The valve cover 4 is limited at the top of the valve body 1 by a locking plate, and an elastic packing 6 extending into the guide hole is provided on the lower surface of the locking plate. When the valve stem 3 drives the valve disc 2 to move upward along the guide hole, the valve opens, and the valve disc 2 squeezes the valve cover 4 under the thrust of the medium at the inlet. Under the squeezing action of the valve cover 4, the packing 6 is deformed to seal the gap between the valve stem 3 and the valve cover 4, thereby achieving an automatic sealing effect. The more the medium thrust, the better the sealing performance.

[0022] Among them, an inlet end for receiving the fluid is provided on one side of the valve body 1, and an outlet end for sending out the fluid is provided on the other side of the valve body 1. The inlet end, the outlet end and the valve stem 3 form a Y-shaped flow channel; the flow channel of the valve body 1 and the main flow channel form an oblique line shape, which reduces the damage to the valve body 1 during the flow of the medium during operation and reduces the pressure loss.

[0023] Among them, the valve cover 4 is arranged on the top of the valve body 1, and one end of the valve cover 4 extends into the valve body 1. The valve cover 4 and the valve body 1 are not fixedly connected by bolts. The valve cover 4 is limited on the valve body 1 by a locking plate. In this way, when the valve disc 2 generates pressure on the valve cover 4, the valve cover 4 will squeeze the packing 6.

[0024] A sealing ring 5 is provided at the joint between the valve cover 4 and the valve body 1 , thereby improving the sealing performance between the valve cover 4 and the valve body 1 .

[0025] A stud 7 is provided between the locking plate and the valve body 1 , a nut 8 is threadedly installed on the end of the stud 7 , and the locking plate is installed above the valve body 1 through the stud 7 and the nut 8 .

[0026] It also includes a top flange 10, a support 9 is fixedly connected between the top flange 10 and the valve body 1, a linear pneumatic valve actuator (not shown in the drawings of the specification) is arranged on the top flange 10, the output end of the linear pneumatic valve actuator is connected to the valve stem 3, and the linear pneumatic valve actuator is used to push the valve stem 3 to move.

[0027] Among them, a sealing ring cooperating with the valve disc 2 is provided at the valve port inside the valve body 1, and the valve disc 2 and the sealing ring are interference fit. When the valve stem 3 pushes the valve disc 2 to move downward, the valve disc 2 cooperates with the sealing ring at the valve port inside the valve body 1, thereby closing the valve.

[0028] Working principle: When in use, the valve cover 4 is limited to the top of the valve body 1 by the locking plate, and the lower surface of the locking plate is provided with an elastic packing 6 extending into the guide hole. When the valve needs to be closed, the valve stem 3 is pushed downward by the straight-stroke pneumatic valve actuator, and the valve stem 3 pushes the valve disc 2 downward, and the valve disc 2 cooperates with the sealing ring at the valve port inside the valve body 1 to close the valve. When the valve needs to be opened, the valve stem 3 is pushed upward by the straight-stroke pneumatic valve actuator, and the valve stem 3 pushes the valve disc 2 upward to open the valve. After the valve is opened, the valve disc 2 squeezes the valve cover 4 under the thrust of the medium at the inlet. Under the squeezing of the valve cover 4, the packing 6 is deformed to seal the gap between the valve stem 3 and the valve cover 4, thereby playing a role of automatic sealing. The more the medium thrust, the better the sealing.

[0029] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

Claims

1. A Y-type self-sealing stop valve, comprising a valve body (1), a valve flap (2) arranged inside the valve body (1), a valve stem (3) connected to the valve flap (2), and a valve cover (4) arranged on the valve body (1), wherein the valve stem (3) passes through the valve cover (4), and is characterized in that: A guide hole cooperating with the valve stem (3) is formed through the axial center of the valve cover (4); a locking plate for locking the valve cover (4) is provided above the valve body (1); a packing (6) extending into the guide hole is provided on the lower surface of the locking plate; When the valve stem (3) drives the valve disc (2) to move upward along the guide hole, the valve opens, and the valve disc (2) is squeezed against the valve cover (4) by the thrust of the medium at the inlet. Under the squeezing action of the valve cover (4), the packing (6) is deformed to seal the gap between the valve stem (3) and the valve cover (4), thereby achieving a sealing effect.

2. A Y-type self-sealing stop valve according to claim 1, characterized in that: An inlet end for receiving fluid is provided on one side of the valve body (1), and an outlet end for delivering fluid is provided on the other side of the valve body (1), wherein the inlet end, the outlet end and the valve stem (3) form a Y-shaped flow channel.

3. A Y-type self-sealing stop valve according to claim 1, characterized in that: The valve cover (4) is arranged on the top of the valve body (1), and one end of the valve cover (4) extends into the valve body (1).

4. A Y-type self-sealing stop valve according to claim 3, characterized in that: A sealing ring (5) is provided at the joint between the valve cover (4) and the valve body (1).

5. A Y-type self-sealing stop valve according to claim 1, characterized in that: A stud (7) is provided between the locking plate and the valve body (1), a nut (8) is threadedly mounted on the end of the stud (7), and the locking plate is mounted above the valve body (1) through the cooperation of the stud (7) and the nut (8).

6. A Y-type self-sealing stop valve according to claim 1, characterized in that: The filler (6) is made of rubber.

7. A Y-type self-sealing stop valve according to claim 1, characterized in that: It also comprises a top flange (10), a support (9) being fixedly connected between the top flange (10) and the valve body (1), a linear-stroke pneumatic valve actuator being provided on the top flange (10), an output end of the linear-stroke pneumatic valve actuator being connected to the valve stem (3), and the linear-stroke pneumatic valve actuator being used to drive the valve stem (3) to move.

8. A Y-type self-sealing stop valve according to claim 1, characterized in that: A sealing ring cooperating with the valve flap (2) is provided at the valve opening inside the valve body (1), and the valve flap (2) and the sealing ring are in interference fit.

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