Novel sealed sandwich valve

Abstract

The utility model relates to a novel sealed sandwich valve, and belongs to the technical field of sandwich valves. The clamp structurally comprises an upper clamp plate, a lower clamp plate and a middle clamp plate, one ends of the upper clamping plate and the lower clamping plate are respectively provided with a through hole, the center of the flashboard is in threaded connection with a transmission lead screw, and the tail end of the transmission lead screw extends out of the middle clamping plate far away from the through hole end; a sealing ring is arranged on one side of the gate plate, and a plurality of bosses distributed circumferentially are arranged at the position of the through hole in the inner surface of the lower clamping plate and located on the same plane. When the flashboard is in a closed state, the boss is supported on one side of the flashboard, and the sealing ring on the other side of the flashboard is sealed with the inner surface of the through hole of the upper clamping plate. According to the novel sealed type sandwich valve, the boss is arranged at the through hole of the lower clamping plate, when the gate plate is in the working state, the gate plate makes contact with the boss and abuts against the sealing ring, the sealing performance of the sandwich valve is guaranteed, when the gate plate is in the non-working state, the gate plate is in the non-abutting state, the sealing ring is not abraded, and therefore the sealing performance of the sandwich valve is improved.

Description

Technical Field

[0001] This utility model relates to a novel sealing clamp valve, belonging to the technical field of clamp valves. Background Technology

[0002] A clamp valve is a type of valve that uses clamping plates and gaskets to achieve a seal. It is mainly used for the diversion, merging, or flow direction switching of media in pipelines. To ensure the sealing performance of a clamp valve, the distance between the upper and lower clamping plates on both sides is usually controlled to ensure the sealing performance of the middle clamping plate. However, when the clamp valve is frequently opened and closed, the lack of clearance between the sealing ring on the middle clamping plate and the upper and lower clamping plates will lead to wear, directly affecting the sealing performance of the clamp valve. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a novel sealing clamp valve. This novel sealing clamp valve increases the distance between the upper and lower clamps and sets a boss at the through hole of the lower clamp. Not only does the gate contact the boss and tighten the sealing ring when it is in the working state, ensuring the sealing performance of the clamp valve, but also when the gate is not in the working state, the gate is in a non-tightened state, and the sealing ring does not wear, thus improving the sealing performance of the clamp valve.

[0004] To solve the above problems, the specific technical solution of this utility model is as follows: A novel sealed clamp valve includes an upper clamp plate, a lower clamp plate, and a middle clamp plate. A cavity is provided within the middle clamp plate to accommodate the movement of a gate. The upper and lower clamp plates are sealed to both sides of the middle clamp plate. A through hole with an area smaller than the gate plate and an equal projected area is provided at one end of each of the upper and lower clamp plates. A transmission screw is threaded to the center of the gate plate, and the end of the transmission screw extends from the middle clamp plate away from the through hole. A sealing ring is provided on one side of the gate plate. Several protrusions are circumferentially distributed at the through hole on the inner surface of the lower clamp plate. The end faces of the protrusions are precision machined and located on the same surface. When the gate plate is closed, the protrusions support one side of the gate plate, and the sealing ring on the other side of the gate plate seals with the inner surface of the through hole in the upper clamp plate.

[0005] The number of bosses is three, with an included angle of 120° between them. The center line of one of the bosses is parallel to the center line of the transmission screw and is located near the outlet end of the transmission screw.

[0006] The protrusion can be arc-shaped, straight-line-shaped, cylindrical, or frustum-shaped.

[0007] The boss and the lower clamping plate are either integrally machined, welded, or fixed separately.

[0008] The inner surface of the lower clamping plate through hole is provided with three slots, and the outer surface of the lower clamping plate through hole is provided with several countersunk through holes corresponding to the slot positions; the boss is located on the surface of the support block, and the support block is inserted into the slot; the inner surface of the support block is provided with threaded holes, and bolts pass through the countersunk through holes and are threadedly connected to the support block.

[0009] The boss, support block, and lower clamping plate are integrally machined, and the inner arc surface of the boss transitions to the surface rounded or chamfered surface of the support block.

[0010] The novel sealed clamp valve of this application, employing the above-described structure, has the following advantages:

[0011] 1. The gate valve's closing seal is changed from the original flat surface fit to a surface fit that reaches the boss, which reduces the wear of the sealing ring and improves the overall lifespan of the clamp valve.

[0012] 2. The boss is set on the support block and machined as a whole, which improves the machining accuracy of the boss. The axial depth of the support block can be adjusted by adjusting the thickness of the shim, thereby adjusting the contact pressure between the sealing ring and the upper clamping plate.

[0013] 3. Three bosses are set to ensure the pressing accuracy of the three points. At the same time, when the gate is far away from two of the bosses, the sealing clamping force fails and the sealing ring is depressurized, thereby reducing the wear of the sealing ring. Attached Figure Description

[0014] Figure 1 This is a three-dimensional view of a new type of sealed clamp valve.

[0015] Figure 2 for Figure 1 The middle longitudinal section view.

[0016] Figure 3 This is a front view of the inner surface of the lower clamping plate.

[0017] Figure 4 This is a front view of the new type of sealed clamp valve.

[0018] Figure 5 for Figure 4 AA sectional view.

[0019] Figure 6 for Figure 5 A magnified view of section B.

[0020] Figure 7 for Figure 5 A magnified view of a portion of point C. Detailed Implementation

[0021] like Figures 1 to 7As shown, a novel sealed clamp valve includes an upper clamp plate 1, a lower clamp plate 2, and a middle clamp plate 3. The middle clamp plate 3 has a cavity that can accommodate the movement of a gate plate 4. The upper clamp plate 1 and the lower clamp plate 2 are sealed to the two side surfaces of the middle clamp plate 3. At one end of the upper clamp plate 1 and the lower clamp plate 2, there are through holes with an area smaller than that of the gate plate 4 but with the same projected area. A transmission screw 7 is threaded to the center of the gate plate 4, and the end of the transmission screw 7 extends from the middle clamp plate 3 away from the through hole. A sealing ring 5 is provided on one side of the gate plate 4. Several circumferentially distributed arc-shaped bosses 6-1 are provided at the through hole on the inner surface of the lower clamp plate 2. The shape of the bosses 6-1 can also be linear, cylindrical, or frustum-shaped. The surfaces of the several bosses 6-1 are precision machined and located on the same surface. When the gate plate 4 is closed, the bosses 6-1 support the sealing ring 5 on one side of the gate plate 4 and seal it to the inner surface of the through hole in the upper clamp plate 1.

[0022] The number of bosses 6-1 is three, with an included angle of 120° between them. The center line of one of the bosses 6-1 is parallel to the center line of the transmission screw 7 and is located near the outlet end of the transmission screw 7. The number of bosses 6-1 can also be increased according to actual needs.

[0023] The boss 6-1 and the lower clamping plate 2 are integrally processed, welded, or fixed separately.

[0024] When the boss 6-1 and the lower clamping plate 2 are separate structures, the support block 6 serves as a transitional connector. Three slots are provided on the inner surface of the through hole in the lower clamping plate 2, and several countersunk through holes 8 corresponding to the slot positions are provided on the outer surface of the through hole in the lower clamping plate 2. The boss 6-1 is located on the surface of the support block 6, and the support block 6 is inserted into the slot. A threaded hole is provided on the inner surface of the support block 6, and bolts pass through the countersunk through holes 8 to connect with the support block 6. By placing shims of different thicknesses between the lower clamping plate 2 and the support block 6, the axial extension height of the support block 6 beyond the inner surface of the lower clamping plate 2 is adjusted, thereby adjusting the contact pressure between the sealing ring and the upper clamping plate.

[0025] The boss 6-1, the support block 6, and the lower clamping plate 2 are integrally machined structures, and the inner arc surface of the boss 6-1 transitions to the surface rounded or chamfered surface of the support block 6.

[0026] The working process of the novel sealed clamp valve of this application is as follows: under the rotation of the transmission screw 7, the gate 4 gradually moves in the cavity of the middle clamp 3 towards the through holes of the upper clamp 1 and the lower clamp 2. Only after the surface of the gate 4 is completely in contact with all three bosses 6-1 will the gate 4 move in the direction of the through hole axis, thereby achieving the sealing ring 5 with the surface of the upper clamp 1. When the sealing environment is released, the reverse rotation of the transmission screw 7 drives the gate 4 to move in the opposite direction. When the outer edge of the gate 4 simultaneously disengages from the two outer bosses 6-1, the sealing ring 5 on the end face of the gate 4 is released from the pressure environment. During the opening and moving process of the gate 4, there is no friction or little friction with the upper clamp 1, so the service life of the sealing ring 5 is long, which improves the overall service life of the novel sealed clamp valve.

Claims

1. A novel sealing clamp valve, characterized in that: The device includes an upper clamping plate (1), a lower clamping plate (2), and a middle clamping plate (3). The middle clamping plate (3) has a cavity that can accommodate the movement of the gate (4). The upper clamping plate (1) and the lower clamping plate (2) are sealed to the two sides of the middle clamping plate (3). At one end of the upper clamping plate (1) and the lower clamping plate (2), there are through holes with an area smaller than that of the gate (4) and equal to its projected area. A transmission screw (7) is threaded into the center of the gate (4). The end of the transmission screw (7) extends from a point far away from the gate. The middle clamping plate (3) at the through hole end extends out; a sealing ring (5) is provided on one side of the gate (4), and several bosses (6-1) are provided at the through hole on the inner surface of the lower clamping plate (2). The end faces of the several bosses (6-1) are precision machined and located on the same surface; when the gate (4) is closed, the bosses (6-1) are supported on one side of the gate (4), and the sealing ring (5) on the other side of the gate (4) seals with the inner surface of the through hole of the upper clamping plate (1).

2. The novel sealing clamp valve according to claim 1, characterized in that: The number of bosses (6-1) is three, with an included angle of 120° between them. The center line of one of the bosses (6-1) is parallel to the center line of the transmission screw (7) and is located near the outlet end of the transmission screw (7).

3. The novel sealing clamp valve according to claim 1, characterized in that: The boss (6-1) can be arc-shaped, straight-line-shaped, cylindrical, or frustum-shaped.

4. The novel sealing clamp valve according to claim 2, characterized in that: The boss (6-1) and the lower clamping plate (2) are integrally processed, welded or separately fixed structures.

5. The novel sealing clamp valve according to claim 3, characterized in that: The inner surface of the through hole of the lower clamping plate (2) is provided with three slots, and the outer surface of the through hole of the lower clamping plate (2) is provided with several countersunk through holes (8) corresponding to the slot positions; the boss (6-1) is located on the surface of the support block (6), and the support block (6) is inserted into the slot; the inner surface of the support block (6) is provided with threaded holes, and the bolt passes through the countersunk through holes (8) and is threadedly connected to the support block (6).

6. The novel sealing clamp valve according to claim 4, characterized in that: The boss (6-1), the support block (6), and the lower clamping plate (2) are integrally machined structures, and the inner arc surface of the boss (6-1) transitions to the surface rounded or chamfered surface of the support block (6).

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