Valve plate of fireproof valve

Abstract

The utility model relates to the technical field of flue valves, and discloses a valve plate assembly of a fireproof valve, which comprises a valve plate body and an elastic sealing element, and the elastic sealing element is mounted on one side of the valve plate body. By arranging the elastic sealing piece, the impact between the valve plate body and the valve body is reduced, the elasticity of the valve plate assembly is improved, the sealing effect between the valve plate body and the valve body is improved, the possibility of deformation of the valve plate body is reduced, and the service life of the valve plate body is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of flue valves, and particularly relates to a fire damper valve plate. Background Art

[0002] The existing large-diameter pipeline valves are mainly hard-sealed valves, which rely on the direct contact between the hard butterfly plate and the hard valve seat to form a hard seal. When the two hard seal surfaces come into contact with each other, they are prone to bumps. And for a seal to occur, elastic extrusion is required between the two contact surfaces. However, the elasticity of the hard seal is limited. After the valve is opened and closed multiple times, the two contact surfaces are likely to deform, greatly reducing the sealing performance of the valve and affecting the use effect of the sealed valve. Moreover, when a fire breaks out, it cannot effectively prevent the flue gas from flowing from the pipeline valve to the flue, easily leading to the spread of the fire. Content of the Utility Model

[0003] The utility model provides a fire damper valve plate to solve the above technical problems.

[0004] The technical solution of the utility model for solving the above technical problems is as follows: A valve plate assembly of a fire damper includes a valve plate body and an elastic seal, and the elastic seal is installed on one side of the valve plate body.

[0005] The beneficial effect of the utility model is: By setting the elastic seal, the impact between the valve plate body and the valve body is reduced, the elasticity of the valve plate assembly is increased, the sealing effect between the valve plate body and the valve body is improved, and the possibility of deformation of the valve plate body is reduced, ensuring the service life of the valve plate body.

[0006] On the basis of the above technical solution, the utility model can further make the following improvements to the above technical solution:

[0007] Further, the material of the elastic seal is high-temperature resistant rubber.

[0008] The beneficial effect of adopting the above further technical solution is that it has sufficient elasticity and improves the service life.

[0009] Further, it further includes a pressing plate. A part of the elastic seal is located between the valve plate body and the pressing plate, and the valve plate body and the pressing plate are connected by fasteners.

[0010] The beneficial effect of adopting the above further technical solution is that the elastic seal is clamped and fixed by the valve plate body and the pressing plate, improving the firmness of the installation of the elastic seal and ensuring the sealing effect.

[0011] Further, a concave groove is provided on the valve plate body, a corresponding protrusion is provided on the pressing plate, the elastic seal includes a sealing portion and a positioning portion, and the positioning portion is located in the accommodation space formed by the inner wall of the groove and the outer wall of the pressing plate.

[0012] The beneficial effect of adopting the above further technical solution is to prevent the elastic seal from coming out between the valve plate body and the pressing plate, and further improve the firmness of the fixing of the elastic seal.

[0013] Further, the valve plate body includes an arc-shaped edge and a straight edge, the arc-shaped edge and the straight edge are smoothly transitioned, and sleeves are provided at both ends of the straight edge.

[0014] The beneficial effect of adopting the above further technical solution is that the sleeves cooperate with the pin shafts on the valve body to realize movably installing the valve plate body on the valve body and ensure the normal operation of the valve body.

[0015] Further, an arc-shaped protrusion is provided on the surface of the valve plate body on the side where the elastic seal is not provided.

[0016] Further, the arc-shaped protrusion and the valve plate body are of an integral structure.

[0017] The beneficial effect of adopting the above further technical solution is to increase the structural strength of the valve plate body.

[0018] Further, the height of the arc-shaped protrusion gradually increases from the starting position to the ending position.

[0019] The beneficial effect of adopting the above further technical solution is to cooperate with the valve body to press the valve plate body, thereby improving the sealing effect.

[0020] Further, the elastic seal is sleeved on the valve plate body.

[0021] Further, the elastic seal is vulcanized on the valve plate body.

[0022] The beneficial effect of adopting the above further technical solution is simple structure and convenient installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional schematic diagram of the valve plate assembly of the present utility model;

[0024] Figure 2 is a schematic diagram of the valve plate assembly of the present utility model from another angle;

[0025] Figure 3 is a cross-sectional schematic diagram of the valve plate assembly of the present utility model;

[0026] Figure 4 is a schematic diagram when the valve plate assembly of the present utility model is in use.

[0027] The reference numerals are recorded as follows: 1. valve plate body; 2. pressing plate; 3. elastic seal; 3.1. sealing surface; 4. arc-shaped protrusion; 4.1. starting position; 4.2. ending position; 5. sleeve; 6. accommodating space; 7. valve body; 8. lever; 9. limit block. Detailed implementation mode

[0028] The principles and features of the present utility model will be described below in conjunction with the accompanying drawings. The examples given are only used to explain the present utility model and are not intended to limit the scope of the present utility model.

[0029] As Figures 1 to 4 shown, the present utility model discloses a valve plate assembly of a fire damper, which includes a valve plate body 1 and an elastic seal 3. The elastic seal 3 is installed on one side of the valve plate body 1. The valve plate body 1 is made of metal, and the elastic seal 3 is made of high-temperature resistant rubber. The elastic seal 3 can be made of fluororubber or silicone rubber, which has good heat resistance and ensures the service life of the elastic seal 3. During use, the sealing surface 3.1 of the elastic seal 3 seals the smoke exhaust port of the valve body 7, improves the sealing effect of the smoke exhaust port, and effectively prevents the smoke from flowing from the pipeline valve to the flue.

[0030] The valve plate assembly of the fire damper further includes a pressing plate 2. A part of the elastic seal 3 is located between the valve plate body 1 and the pressing plate 2. The valve plate body 1 and the pressing plate 2 are connected by fasteners. The fasteners are screws, bolts or rivets, which ensure the firm connection between the valve plate body 1 and the pressing plate 2 and prevent the elastic seal 3 from coming out.

[0031] Furthermore, a groove concave to one side is provided on the valve plate body 1, and a corresponding protrusion is provided on the pressing plate 2. The elastic seal 3 includes a sealing part and a positioning part. The positioning part is located in the accommodating space 6 formed by the inner wall of the groove and the outer wall of the pressing plate 2. The thickness of the positioning part is greater than that of the sealing part, which improves the pressing effect on the positioning part and ensures the firm fixation of the elastic seal 3.

[0032] The valve plate body 1 includes an arc-shaped edge and a straight edge, and the arc-shaped edge and the straight edge are smoothly transitioned. Sleeves 5 are provided at both ends of the straight edge. During use, the arc-shaped edge corresponds to the smoke exhaust port on the valve body 7 to ensure the sealing effect of the smoke exhaust port. The sleeves 5 are adapted to the pin shafts on the valve body 7, so that the valve plate body 1 rotates around the pin shaft to ensure the normal smoke exhaust of the valve body 7.

[0033] On the side of the valve plate body 1 where the elastic seal 3 is not provided on the plate surface, there is an arc-shaped protrusion 4. That is, the arc-shaped protrusion 4 and the elastic seal 3 are located on both sides of the valve plate body 1. A lever 8 is arranged at the middle position of the valve body 7 through a torsion spring, and the lever 8 is fixed on the valve body 7 by a low-melting-point solder after being energized by the torsion spring. When a fire occurs, the high temperature melts the low-melting-point solder, and the lever 8 loses the fixing effect of the solder. Under the action of the torsion spring, it rotates around the axis to the valve plate body 1. The end of the lever 8 coincides with the gradually rising arc-shaped protrusion 4 on the valve plate body 1 in the rotation path. Therefore, the end of the lever 8 will finally press on the arc-shaped protrusion 4, and then the valve plate body 1 is firmly buckled on the smoke exhaust port of the valve body 7 to avoid the spread of fire. The arc-shaped protrusion 4 structure makes the lever 8 and the valve plate body 1 closely abut together, improving the sealing effect on the smoke exhaust port.

[0034] The height of the arc-shaped protrusion 4 gradually increases from the starting position 4.1 to the ending position 4.2, that is, the arc-shaped protrusion 4 is wedge-shaped as a whole. When the lever 8 rotates, the end of the lever 8 gradually climbs from the starting position 4.1 of the wedge-shaped arc-shaped protrusion 4 to the ending position 4.2, and it also changes from having no contact with the valve plate body 1 to closely abutting against the arc-shaped protrusion 4, playing the pressing effect of the lever 8 on the valve plate body 1. A limiting block 9 is also provided on the valve body 7. The limiting block 9 limits the lever 8 to rotate at most 90° from the original position, and when the lever 8 rotates 90°, the end of the lever 8 is just located at the highest point position of the arc-shaped protrusion 4.

[0035] The arc-shaped protrusion 4 and the valve plate body 1 are of an integral structure. Specifically, the valve plate body 1 forms the arc-shaped protrusion 4 through stamping. The elastic seal 3 is located outside the arc-shaped protrusion 4, increasing the structural strength of the valve plate body 1, with a compact structure and reducing the number of parts.

[0036] Optionally, the elastic seal 3 is sleeved on the valve plate body 1, which is convenient for replacing the damaged elastic seal 3 and improving the overall service life of the valve plate assembly.

[0037] Optionally, the elastic seal 3 is vulcanized on the valve plate body 1 to ensure the firm installation of the elastic seal 3 and reduce the number of parts.

[0038] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A valve plate assembly for a fire damper, characterized in that: The invention comprises a valve plate body (1) and an elastic sealing member (3), wherein the elastic sealing member (3) is mounted on one side of the valve plate body (1), and an arc-shaped protrusion (4) is provided on a side of the plate surface of the valve plate body (1) where the elastic sealing member (3) is not provided, wherein the height of the arc-shaped protrusion (4) gradually increases from a starting position (4.1) to an ending position (4.2).

2. The valve plate assembly of the fire damper according to claim 1, characterized in that: The elastic sealing element (3) is made of high temperature resistant rubber.

3. The valve plate assembly of the fire damper according to claim 1 or 2, characterized in that: It also comprises a pressure plate (2), a part of the elastic sealing member (3) is located between the valve plate body (1) and the pressure plate (2), and the valve plate body (1) and the pressure plate (2) are connected via fasteners.

4. The valve plate assembly of the fire damper according to claim 3, characterized in that: The valve plate body (1) is provided with a groove which is concave toward one side, the pressure plate (2) is provided with a corresponding protrusion, and the elastic sealing member (3) comprises a sealing portion and a positioning portion, wherein the positioning portion is located in a receiving space (6) formed by an inner wall of the groove and an outer wall of the pressure plate (2).

5. The valve plate assembly of the fire damper according to claim 1, characterized in that: The valve plate body (1) comprises an arcuate edge and a straight edge, the arcuate edge and the straight edge have a smooth transition, and sleeves (5) are provided at both ends of the straight edge.

6. The valve plate assembly of the fire damper according to claim 1, characterized in that: The arc-shaped protrusion (4) and the valve plate body (1) are an integrated structure.

7. The valve plate assembly of the fire damper according to claim 1 or 2, characterized in that: The elastic sealing component (3) is sleeved on the valve plate body (1).

8. The valve plate assembly of the fire damper according to claim 2, characterized in that: The elastic sealing component (3) is vulcanized on the valve plate body (1).

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