Self-sealing hydraulic valve gate

Abstract

The utility model provides a kind of self-sealing hydraulic valve gate, including valve body, gate board subassembly, valve seat, valve head and hydraulic cylinder, valve cavity is opened in valve body, valve head is set on the upside of valve body, its inside is provided with gate board bin, hydraulic cylinder is set in the top of valve head, and gate board subassembly is controlled to move up and down, valve seat includes a pair of elastic sealing ring with, sealing ring is symmetrically set, the movement path of gate board subassembly is set between two sealing rings, when hydraulic cylinder drives gate board subassembly to lift and separate sealing ring, two sealing rings are extruded and close tightly each other, when hydraulic cylinder drives gate board subassembly to move down, gate board subassembly is extruded to between two sealing rings, and the liquid flow in valve body is cut off, when gate board subassembly separates sealing ring, two sealing rings are extruded and close tightly each other, ensure that liquid medium does not leak from gap, to reach self-sealing effect.

Description

Technical Field

[0001] This utility model relates to valves, and more particularly to a self-sealing hydraulic valve gate. Background Technology

[0002] Gate valves are a very common and important type of valve. Their core feature is the use of a valve plate to cut off or allow the flow of media. The gate plate moves between the pipeline and the silo. Usually, a layer of sealing material is sprayed or covered on the valve plate to ensure that water does not leak out when the gate valve is closed. At the same time, a sealing ring is set on the tail rod of the valve plate to ensure that water does not leak out from the valve head.

[0003] Currently, Chinese patent CN207246458U discloses a gate valve, including a valve body, valve seat, valve stem, valve cover, gate plate, and valve cover nut. The gate plate has an annular groove, and a gasket is provided on the annular groove. The gasket abuts against the bottom of the valve stem. The valve cover is fixed to the valve body by the valve cover nut. A locking plate is also provided between the valve cover nut and the valve cover. This gate valve has the characteristics of simple structure, convenient installation and maintenance, and good sealing effect.

[0004] The aforementioned patent still has shortcomings. When the gate valve is opened, the valve plate will move upward back into the plate compartment. At this time, water will enter the plate compartment. If the water contains impurities such as mud and sand and enters the plate compartment, closing the gate valve again will cause the mud and sand to wear down the sealing material on the gate valve, reducing the service life of the gate valve. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a self-sealing hydraulic valve gate, which has the function of preventing liquid from entering the silo.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: a self-sealing hydraulic valve gate, including a valve body, a gate assembly, a valve seat, a valve head, and a hydraulic cylinder. The valve body has a valve cavity, with an inlet and an outlet respectively provided on both sides of the valve cavity. The valve head is located on the upper side of the valve body, and a gate chamber is provided inside it. When the valve is opened, the gate assembly is located in the gate chamber. The hydraulic cylinder is located on the top of the valve head and controls the gate assembly to move up and down. The gate assembly cooperates with the valve seat to complete the seal. The valve seat includes a pair of elastic sealing rings, which are symmetrically arranged. The movement path of the gate assembly is located between the two sealing rings. When the hydraulic cylinder drives the gate assembly to lift up and disengage from the sealing rings, the two sealing rings are pressed tightly against each other. When the hydraulic cylinder drives the gate assembly to move down, the gate assembly is pressed between the two sealing rings and cuts off the liquid flow in the valve body.

[0007] Preferably, a pressure groove is provided at both the inlet and outlet, and the sealing ring is installed in the pressure groove. A flange ring can also be detachably provided at the inlet and outlet, and the flange ring is used to press the sealing ring into the pressure groove.

[0008] Preferably, the outer end face of the sealing ring is further provided with a spring groove, and a compression spring is provided in the spring groove. One end of the compression spring abuts against the bottom of the spring groove, and the other end abuts against the sealing ring.

[0009] Preferably, the gate assembly includes a gate body, a gate rod, and four guide posts. One end of the gate rod is fixedly disposed at the tail of the gate body, and the other end is fixedly disposed at the output end of the hydraulic cylinder. One end of the four guide posts is disposed at the tail of the gate body, and the other end is slidably connected to the valve head.

[0010] Preferably, the valve body is further provided with a slot, the gate body moves along the slot, a cleaning chamber is formed between the slot and the gate body, and the cleaning chamber is connected to a cleaning inlet and a cleaning outlet.

[0011] Preferably, the bottom of the valve body is further provided with a base plate, and the base plate is provided with a second cleaning inlet and a second cleaning outlet on both sides.

[0012] Preferably, the contact surfaces of the two sealing rings are further provided with rounded chamfers.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. It adopts a flexible sealing ring structure. When the gate assembly is separated from the sealing ring, the two sealing rings are squeezed and pressed tightly against each other to ensure that the liquid medium does not leak out from the gap, thereby achieving a self-sealing effect. 2. By opening pressure grooves and installing detachable flange rings at the inlet and outlet, the installation and replacement of the sealing ring are facilitated. At the same time, the sealing ring can be better pressed into the pressure groove, further ensuring the sealing effect. By setting spring grooves and pressure springs on the outer end face of the sealing ring, a certain pressure is provided for the sealing ring when the sealing ring is worn, further improving the stability of the seal. 3. By opening a cleaning chamber and connecting cleaning inlet one, cleaning outlet one, cleaning inlet two, and cleaning outlet two, it is convenient to clean the area around the junction of the valve plate body and the sealing ring, so as to maintain a clean space in the valve body, reduce the friction between the gate and the rubber ring, improve the service life of the valve, and ensure a stable sealing effect. Attached Figure Description

[0014] Figure 1 This is a half-sectional schematic diagram of an embodiment; Figure 2 This is a cross-sectional schematic diagram of an embodiment; Figure 3 for Figure 2 Schematic diagram of Part A; Figure 4 for Figure 2 Schematic diagram of Part B; Figure 5 This is a schematic diagram of the sealing ring.

[0015] Reference numerals: 1. Valve body; 2. Gate assembly; 3. Valve seat; 4. Hydraulic cylinder; 5. Valve chamber; 6. Inlet; 7. Outlet; 8. Gate chamber; 9. Sealing ring; 10. Pressure groove; 11. Flange ring; 12. Spring groove; 13. Compression spring; 14. Gate body; 15. Gate rod; 16. Guide four pillars; 17. Slot; 18. Cleaning chamber; 19. Cleaning inlet one; 20. Cleaning outlet one; 21. Cleaning inlet two; 22. Cleaning outlet two; 23. Valve head; 24. Base plate. Detailed Implementation

[0016] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered.

[0017] A self-sealing hydraulic gate valve includes a valve body 1, a gate assembly 2, a valve seat 3, a valve head 23, and a hydraulic cylinder 4. The valve body 1 has a valve cavity 5, with an inlet 6 and an outlet 7 on either side of the cavity 5. The valve head 23 is located on the upper side of the valve body 1 and contains a gate chamber 8. When the valve is open, the gate assembly 2 is positioned within the gate chamber 8; when the valve is closed, the gate assembly 2 moves from the gate chamber 8 into the valve body 1. The hydraulic cylinder 4 is located on top of the valve head 23 and controls the up-and-down movement of the gate assembly 2. The gate assembly 2 and the valve seat 3 cooperate to complete the sealing. The valve seat 3 includes a pair of elastic sealing rings 9, which are symmetrically arranged. The movement path of the gate assembly 2 is set between the two sealing rings 9. When the hydraulic cylinder 4 drives the gate assembly 2 to lift up and disengage from the sealing rings 9, the two sealing rings 9 are pressed together tightly. When the hydraulic cylinder 4 drives the gate assembly 2 to move down, the gate assembly 2 is pressed between the two sealing rings 9 and is pressed tightly against the sealing rings 9. After the gate assembly 2 is fully in place, it cuts off the flow of liquid in the valve body 1.

[0018] Pressure grooves 10 are provided at both the inlet 6 and the outlet 7. The sealing ring 9 is installed in the pressure groove 10. Flange rings 11 can also be detached at the inlet 6 and the outlet 7. The flange ring 11 is fixed to the valve body 1 by screws and presses the sealing ring 9 into the pressure groove 10. When the sealing ring 9 needs to be replaced, the flange ring 11 can be removed.

[0019] A spring groove 12 is also provided on the outer end face of the sealing ring 9. A compression spring 13 is provided in the spring groove 12. One end of the compression spring 13 rests against the bottom of the spring groove 12, and the other end rests against the sealing ring 9. When the two sealing rings 9 are in contact with each other and a certain amount of wear occurs, the compression spring 13 will provide a certain amount of pressure to the sealing ring 9, increase the clamping force of the sealing ring 9, and further improve the stability of the seal.

[0020] The gate assembly 2 includes a gate body 14, a gate rod 15, and four guide posts 16. One end of the gate rod 15 is fixedly installed at the tail of the gate body 14, and the other end is fixed to the output end of the hydraulic cylinder 4. One end of the guide post 16 is installed at the tail of the gate body 14, and the other end is slidably connected to the valve head 23. The guide post 16 is used to increase the sliding accuracy of the gate body 14 and provide the position information of the gate body 14. The gate body 14 can be opened or closed based on the exposed length of the guide post 16. The contact surfaces of the two sealing rings 9 are also provided with rounded chamfers, which makes it easier for the gate body 14 to separate the two sealing rings 9 and plays a certain guiding role.

[0021] The valve body 1 is also provided with a slot 17. The gate body 14 moves along the slot 17. A cleaning chamber 18 is formed between the slot 17 and the gate body 14. The cleaning chamber 18 is connected to a cleaning inlet 19 and a cleaning outlet 20. The bottom of the valve body 1 is also provided with a bottom plate 24. A second cleaning inlet 21 and a second cleaning outlet 22 are provided on both sides of the bottom plate 24. By opening the cleaning chamber 18 and connecting the first cleaning inlet 19, the first cleaning outlet 20, the second cleaning inlet 21 and the second cleaning outlet 22, it is convenient to clean the area around the junction of the gate body 14 and the sealing ring 9, reduce the residue of impurities, prevent impurities from damaging the sealing ring 9, and extend the service life of the sealing ring 9.

[0022] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A self-sealing hydraulic valve gate, comprising a valve body (1), a gate assembly (2), a valve seat (3), a valve head (23), and a hydraulic cylinder (4), wherein a valve cavity (5) is provided in the valve body (1), and an inlet (6) and an outlet (7) are respectively provided on both sides of the valve cavity (5); the valve head (23) is located on the upper side of the valve body (1), and a gate chamber (8) is provided inside it; when the valve is opened, the gate assembly (2) is located in the gate chamber (8); the hydraulic cylinder (4) is located on the top of the valve head (23) and controls the gate assembly (2) to move up and down; the gate assembly (2) cooperates with the valve seat (3) to complete the sealing, characterized in that: The valve seat (3) includes a pair of elastic sealing rings (9) arranged symmetrically. The movement path of the gate assembly (2) is arranged between the two sealing rings (9). When the hydraulic cylinder (4) drives the gate assembly (2) to lift up and disengage from the sealing rings (9), the two sealing rings (9) press against each other. When the hydraulic cylinder (4) drives the gate assembly (2) to move down, the gate assembly (2) is pressed between the two sealing rings (9) and cuts off the liquid flow in the valve body (1).

2. The self-sealing hydraulic valve gate according to claim 1, characterized in that: Pressure grooves (10) are provided at both the inlet (6) and outlet (7). The sealing ring (9) is installed in the pressure groove (10). Flange rings (11) can also be detachably provided at the inlet (6) and outlet (7). The flange rings (11) are used to press the sealing ring (9) into the pressure groove (10).

3. A self-sealing hydraulic valve gate according to claim 2, characterized in that: The outer end face of the sealing ring (9) is also provided with a spring groove (12), and a pressure spring (13) is provided in the spring groove (12). One end of the pressure spring (13) abuts against the bottom of the spring groove (12), and the other end abuts against the sealing ring (9).

4. A self-sealing hydraulic valve gate according to claim 1, characterized in that: The gate assembly (2) includes a gate body (14), a gate rod (15), and a guide four-post (16). One end of the gate rod (15) is fixedly installed at the tail of the gate body (14), and the other end is fixed to the output end of the hydraulic cylinder (4). One end of the guide four-post (16) is installed at the tail of the gate body (14), and the other end is slidably connected to the valve head (23).

5. A self-sealing hydraulic valve gate according to claim 4, characterized in that: The valve body (1) is also provided with a slot (17), the gate body (14) moves along the slot (17), and a cleaning chamber (18) is formed between the slot (17) and the gate body (14). The cleaning chamber (18) is connected to a cleaning inlet (19) and a cleaning outlet (20).

6. A self-sealing hydraulic valve gate according to claim 1, characterized in that: The bottom of the valve body (1) is also provided with a base plate (24), and the base plate (24) is provided with a second cleaning inlet (21) and a second cleaning outlet (22) on both sides.

7. A self-sealing hydraulic valve gate according to claim 1, characterized in that: The contact surfaces of the two sealing rings (9) are also provided with rounded chamfers.

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