Sealing gate valve

Abstract

The utility model provides a sealing gate valve, and belongs to the technical field of valves. The gate valve solves the problem that leakage occurs due to the fact that sealing is not tight enough frequently in the using process of an existing gate valve. The sealing gate valve comprises a gate valve body, a valve seat and a valve rod are arranged on the gate valve body, a water inlet pipeline and a water outlet pipeline are arranged at the front end and the rear end of the gate valve body, a first connecting pipe fitting is arranged at the position, opposite to the water inlet pipeline, of the gate valve body, a second connecting pipe fitting is arranged on the gate valve body, a valve element is arranged at the lower end of the valve rod, and a sealing ring is arranged on the valve rod. A water outlet of the first connecting pipe fitting is of an inclined structure, a water inlet of the second connecting pipe fitting is of an inclined structure, and the connecting faces on the left side and the right side of the valve element are attached to the inclined faces of the valve element and the valve element so that the first connecting pipe fitting and the second connecting pipe fitting can be sealed. The second connecting pipe fitting is provided with a non-return assembly used for liquid non-return. The sealing structure has the advantage of being good in sealing effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves, relates to a gate valve, and particularly relates to a sealed gate valve. Background Technique

[0002] With the development of society, pipeline connections are required both in production and in life. In pipeline connections, pipeline connectors need to be applied. Among them, the gate valve is one of the frequently used pipeline connectors. The gate valve is a closing member, the gate plate, and the movement direction of the gate plate is perpendicular to the fluid direction. The gate valve can only be fully opened and fully closed, and cannot be adjusted and throttled.

[0003] During the use of the existing gate valve, the gate valve plate is usually forced against the valve seat by an external force to ensure the sealing effect. However, during the use process, the phenomenon of insufficient sealing and leakage often occurs, reducing the sealing effect. Summary of the Invention

[0004] The purpose of the utility model is to provide a sealed gate valve with good sealing effect 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 sealed gate valve includes a valve body, a valve seat and a valve rod are arranged on the valve body. An inlet pipe for water inlet and an outlet pipe for water outlet are arranged at the front and rear ends of the valve body. It is characterized in that a connecting fitting one is arranged on the valve body at a position relative to the inlet pipe, a connecting fitting two is arranged on the valve body at a position relative to the outlet pipe. A valve core is arranged at the lower end of the valve rod, a sealing ring for sealing the valve seat is arranged on the valve rod. The outlet of the connecting fitting one is arranged in an inclined structure, the inlet of the connecting fitting two is arranged in an inclined structure. The connecting surfaces on the left and right sides of the valve core are respectively attached to the inclined surfaces of the two to seal the connecting fitting one and the connecting fitting two. A filtering component for filtering liquid is arranged on the connecting fitting one, and a check component for liquid check is arranged on the connecting fitting two.

[0006] In the above-mentioned sealed gate valve, the filtering component is composed of a mounting ring and a filter screen, the check component is composed of a water baffle, a sliding rod, a check plate and a return spring. A fixing part is arranged in the connecting fitting two, and a plurality of water passing holes are opened on the fixing part. The check plate is arranged at the front end of the fixing part, the water baffle is arranged at the rear end of the fixing part. The water baffle closes or circulates the water passing holes under the action of the return spring and the check plate.

[0007] In the above-mentioned sealed gate valve, the inclined surface of the connecting fitting one fits with the inclined surface on one side of the valve core, and the inclined surface of the connecting fitting two fits with the inclined surface on the other side of the valve core.

[0008] In the above-mentioned kind of globe valve, the first connecting pipe fitting is connected to the water inlet pipe through threads, and the second connecting pipe fitting is connected to the water outlet pipe through threads.

[0009] Compared with the prior art, the present globe valve has the following advantages:

[0010] 1. By connecting the valve core with the two connecting pipe fittings, the overall sealing effect of the globe valve is improved.

[0011] 2. Both the first connecting pipe fitting and the second connecting pipe fitting are connected to the valve body through threads, which is convenient for the staff to repair and replace them.

[0012] 3. The first connecting pipe fitting is provided with a filtering component, and the second connecting pipe fitting is provided with a check component, so that the globe valve has the functions of filtering and check. Description of the Drawings

[0013] Figure 1 is a schematic cross-sectional structure view of the present utility model.

[0014] In the figure, 1. Valve body; 2. Valve seat; 3. Valve stem; 4. First connecting pipe fitting; 5. Second connecting pipe fitting; 6. Valve core; 7. Sealing ring; 8. Filtering component; 9. Baffle plate; 10. Sliding rod; 11. Check plate; 12. Return spring; 13. Fixed part. Detailed Embodiments

[0015] The following are specific embodiments of the present utility model and in combination with the drawings, the technical solutions of the present utility model are further described, but the present utility model is not limited to these embodiments.

[0016] As Figure 1 shown, the present globe valve includes a valve body 1, a valve seat 2 and a valve stem 3 are arranged on the valve body 1, water inlet pipes for water inlet and water outlet pipes for water outlet are arranged at the front and rear ends of the valve body 1, a first connecting pipe fitting 4 is arranged on the valve body 1 at a position relative to the water inlet pipe, a second connecting pipe fitting 5 is arranged on the valve body 1 at a position relative to the water outlet pipe, a valve core 6 is arranged at the lower end of the valve stem 3, a sealing ring 7 for sealing the valve seat 2 is arranged on the valve stem 3, when the valve core 6 moves upward, the upper end of the sealing ring 7 is in contact with the valve seat 2, thereby sealing the connection between the valve seat 2 and the valve body 1 and improving the sealing effect of the valve body 1, the water outlet of the first connecting pipe fitting 4 is arranged in an inclined structure, the water inlet of the second connecting pipe fitting 5 is arranged in an inclined structure, the connecting surfaces on the left and right sides of the valve core 6 are respectively in contact with the inclined surfaces of the two to seal the first connecting pipe fitting 4 and the second connecting pipe fitting 5, a filtering component 8 for filtering liquid is arranged on the first connecting pipe fitting 4, and a check component for liquid check is arranged on the second connecting pipe fitting 5.

[0017] Specifically, the filtering component 8 is composed of an installation ring and a filter net. The check component is composed of a water baffle 9, a sliding rod 10, a check plate 11 and a return spring 12. A fixing part 13 is arranged inside the second connecting pipe fitting 5. A plurality of water passing holes are formed in the fixing part 13. The check plate 11 is arranged at the front end of the fixing part 13. The water baffle 9 is arranged at the rear end of the fixing part 13. The water baffle 9 closes or allows the passage of water through the water passing holes under the action of the return spring 12 and the check plate 11.

[0018] Specifically, when the valve is opened, when the liquid flows into the gate valve body 1, it is filtered through the filter net on the first connecting pipe fitting 4, and then through the second connecting pipe fitting 5, the check plate 11 is pushed to the right, the return spring 12 is in a compressed state, the water baffle 9 moves to the right, and the water passing holes are in a flowing state. When the valve is closed, the check plate 11 is no longer under the pressure of the liquid, the return spring 12 rebounds, and the water baffle 9 is pressed tightly against the fixing part 13 again to close the water passing holes.

[0019] Specifically, the inclined surface of the first connecting pipe fitting 4 fits with the inclined surface on one side of the valve core 6, and the inclined surface of the second connecting pipe fitting 5 fits with the inclined surface on the other side of the valve core 6. The sealing surfaces on the first connecting pipe fitting 4 and the second connecting pipe fitting 5 respectively fit with the valve core 6, improving the sealing effect of the gate valve during sealing.

[0020] Specifically, the first connecting pipe fitting 4 is connected to the water inlet pipe through a thread, and the second connecting pipe fitting 5 is connected to the water outlet pipe through a thread.

[0021] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the technical field to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0022] Although terms such as gate valve body 1, valve seat 2, valve rod 3, first connecting pipe fitting 4, second connecting pipe fitting 5, valve core 6, sealing ring 7, filtering component 8, water baffle 9, sliding rod 10, check plate 11, return spring 12, fixing part 13, etc. are used more in this article, the possibility of using other terms is not excluded. Using these terms is only for more convenient description and explanation of the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A sealed gate valve, comprising a gate valve body (1), wherein the gate valve body (1) is provided with a valve seat (2) and a valve stem (3), and the front and rear ends of the gate valve body (1) are provided with a water inlet pipe for water inlet and a water outlet pipe for water outlet, wherein: A connecting pipe part 1 (4) is arranged on the gate valve body (1) at a position relative to the water inlet pipe, and a connecting pipe part 2 (5) is arranged on the gate valve body (1) at a position relative to the water outlet pipe. A valve core (6) is arranged at the lower end of the valve stem (3), and a sealing ring (7) for sealing the valve seat (2) is arranged on the valve stem (3). The water outlet of the connecting pipe part 1 (4) is arranged in an inclined structure, and the water inlet of the connecting pipe part 2 (5) is arranged in an inclined structure. The connecting surfaces on the left and right sides of the valve core (6) are respectively in contact with the inclined surfaces of the two, so as to seal the connecting pipe part 1 (4) and the connecting pipe part 2 (5). The connecting pipe part 1 (4) is provided with a filtering assembly (8) for filtering liquid, and the connecting pipe part 2 (5) is provided with a non-return assembly for non-return of liquid.

2. A sealing gate valve according to claim 1, characterized in that: The filter assembly (8) is composed of a mounting ring and a filter screen, the non-return assembly is composed of a water baffle plate (9), a sliding rod (10), a non-return plate (11) and a reset spring (12), a fixing portion (13) is arranged inside the second connecting pipe member (5), a plurality of water holes are opened on the fixing portion (13), the non-return plate (11) is arranged at the front end of the fixing portion (13), the water baffle plate (9) is arranged at the rear end of the fixing portion (13), and the water baffle plate (9) closes or allows the water holes to flow under the action of the reset spring (12) and the non-return plate (11).

3. A sealing gate valve according to claim 1, characterized in that: The inclined surface of the connecting pipe piece 1 (4) matches the inclined surface of one side of the valve core (6), and the inclined surface of the connecting pipe piece 2 (5) matches the inclined surface of the other side of the valve core (6).

4. A sealing gate valve according to claim 1, characterized in that: The connecting pipe piece 1 (4) is connected to the water inlet pipe via a thread, and the connecting pipe piece 2 (5) is connected to the water outlet pipe via a thread.

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