Vacuum baffle valve

Abstract

The utility model discloses a vacuum baffle valve which comprises a valve body, a valve plate, a valve seat and a driving cylinder, the valve body comprises an air inlet and an air outlet, the valve seat is fixedly connected to the air inlet, the valve plate is fixedly connected to a telescopic rod of the driving cylinder, a conical groove is formed in the surface, facing the valve seat, of the valve plate, and the valve seat is fixedly connected to the conical groove. The valve seat is provided with a conical protruding block which can scrape off glue oil on the surface of the conical groove in the embedded and sealed connection process of the valve body and the valve seat and can be connected with the conical groove in an embedded and sealed mode, and a glue storage groove used for storing the glue oil is formed in the middle of the conical protruding block. And the middle part of the glue storage groove is provided with a glue blocking pipe of which the outer wall is used for blocking glue oil and the inner wall is used for air intake. The sealing face between the valve plate and the valve seat can be cleaned in time, and the sealing performance between the valve plate and the valve seat is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of baffle valves, in particular to a vacuum baffle valve. Background Art

[0002] The vacuum flapper valve is a valve used to control the flow of fluid media. It is usually used in pipeline systems. The flow and pressure of the medium can be controlled by opening and closing the flapper. It usually includes components such as a valve body, a valve plate, a valve seat, and a drive device. The valve plate is sealed and connected to the valve seat, and the opening and closing of the valve plate is controlled by the drive device.

[0003] During the sintering process in a vacuum furnace, the exhaust and debinding system of the vacuum furnace needs to be evacuated or debinded, and a large amount of impurities and cold gel are generated in the gas, which easily forms glue oil adhering to the valve plate, thereby affecting the sealing performance of the vacuum baffle valve. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a vacuum baffle valve with relatively stable sealing performance.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A vacuum baffle valve comprises a valve body, a valve plate, a valve seat and a driving cylinder, wherein the valve body comprises an air inlet and an air outlet, the valve seat is fixedly connected to the air inlet, the valve plate is fixedly connected to the telescopic rod of the driving cylinder, a conical groove is provided on the surface of the valve plate facing the valve seat, a conical protrusion is provided on the valve seat which can scrape off the rubber on the surface of the conical groove during the process of the valve body and the valve seat being engaged and sealed and can be engaged and sealed with the conical groove, a glue storage groove for storing rubber is provided in the middle of the conical protrusion, an outer wall is provided in the middle of the glue storage groove for isolating the rubber and an inner wall is provided for a rubber blocking tube for air intake.

[0007] As a further improvement of the above solution:

[0008] The valve plate is located in the middle of the conical groove and is provided with a rubber stop tube accommodating cavity for accommodating the rubber stop tube. The conical groove, conical protrusion, rubber storage groove and rubber stop tube are all arranged coaxially with the telescopic rod. The conical groove includes a sealing bevel, and the sealing bevel is provided with an annular dovetail groove. A sealing ring is embedded and connected in the dovetail groove.

[0009] The valve seat is provided with a glue discharge channel which is connected with the glue storage groove.

[0010] A valve plate accommodating cavity for accommodating the valve plate when the valve plate is in a raised state is provided in the valve body above the air outlet, and an openable and closable rubber baffle is provided at the bottom of the valve plate accommodating cavity.

[0011] The rubber baffle plate is hinged to the valve body, and a tension spring is provided between the rubber baffle plate and the valve body, which can pull up the rubber baffle plate and close the valve plate accommodating cavity when the valve plate is located in the valve plate accommodating cavity.

[0012] The valve plate is provided with abutting part which can abut against the rubber baffle plate to keep the rubber baffle plate in an open state when the valve plate is sealed and connected with the valve seat.

[0013] The rubber baffle plate is provided with a pulley which can be in contact and connected with the abutment portion when the valve plate is sealed and connected with the valve seat.

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

[0015] The utility model proposes a vacuum baffle valve. When the valve is opened, the valve plate is in a raised state, and the rubber-carrying gas enters the interior of the valve body from the rubber baffle tube and accumulates into rubber oil on the surface of the conical groove. When the vacuum baffle valve is closed, the valve plate will descend under the action of the telescopic rod until it forms a sealed contact connection with the valve seat. During the descent of the valve plate, the top of the conical protrusion will contact the conical groove, and gradually scrape off the rubber oil on the conical groove and flow into the rubber storage tank, so that the sealing surface between the valve plate and the valve seat can be cleaned in time, thereby ensuring the sealing performance between the valve plate and the valve seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of a vacuum baffle valve in an embodiment.

[0017] Figure 2 2 is a cross-sectional view of the vacuum baffle valve in the embodiment in an open state.

[0018] Figure 3 2 is a cross-sectional view of the vacuum baffle valve in the closed state in the embodiment.

[0019] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0020] The symbols in the figure represent:

[0021] 1. Valve body; 11. Air inlet; 12. Air outlet; 13. Valve plate accommodating chamber; 2. Valve plate; 21. Conical groove; 22. Rubber stop tube accommodating chamber; 23. Dovetail groove; 24. Abutment portion; 3. Valve seat; 31. Conical protrusion; 32. Glue storage groove; 33. Rubber stop tube; 34. Glue discharge channel; 4. Drive cylinder; 41. Telescopic rod; 5. Sealing ring; 6. Rubber stop plate; 61. Pulley; 7. Tension spring. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] Figures 1 to 4An embodiment of a vacuum baffle valve of the utility model is shown, comprising a valve body 1, a valve plate 2, a valve seat 3, and a drive cylinder 4. The valve body 1 comprises an air inlet 11 and an air outlet 12. The valve seat 3 is fixedly connected to the air inlet 11. The valve plate 2 is fixedly connected to the telescopic rod 41 of the drive cylinder 4. The surface of the valve plate 2 facing the valve seat 3 is provided with a conical groove 21. The valve seat 3 is provided with a conical protrusion 31 which can scrape off the rubber oil on the surface of the conical groove 21 and can be engaged and sealed with the conical groove 21 during the process of the valve body 1 and the valve seat 3 being engaged and sealed. A rubber storage groove 32 for storing rubber oil is provided in the middle of the conical protrusion 31. A rubber blocking pipe 33 for air intake is provided in the middle of the rubber storage groove 32 with an outer wall for blocking the rubber oil and an inner wall for air intake. In this structure, when the valve is opened, the valve plate 2 is in a raised state, and the rubber-carrying gas enters the interior of the valve body 1 from the rubber blocking pipe 33 and accumulates into rubber oil on the surface of the conical groove 21. When the vacuum baffle valve is closed, the valve plate 2 will descend under the action of the telescopic rod 41 until it forms a sealed contact connection with the valve seat 3. During the descending process of the valve plate 2, the top of the conical protrusion 31 will contact the conical groove 21, and gradually scrape off the glue on the conical groove 21 and flow into the glue storage groove 32, so that the sealing surface between the valve plate 2 and the valve seat 3 can be cleaned in time, ensuring the sealing performance of the valve plate 2 and the valve seat 3.

[0024] In this embodiment, the valve plate 2 is provided with a rubber stop tube accommodating cavity 22 for accommodating the rubber stop tube 33 in the middle of the conical groove 21. The conical groove 21, the conical convex block 31, the rubber storage groove 32 and the rubber stop tube 33 are all arranged coaxially with the telescopic rod 41. The conical groove 21 includes a sealing slope, and the sealing slope is provided with an annular dovetail groove 23, and the dovetail groove 23 is embedded with a sealing ring 5. Through this structure, the valve plate 2 and the valve seat 3 have good sealing performance, and the sealing ring 5 is in a raised state, which can better ensure that the rubber oil on the membrane surface of the sealing ring 5 is scraped off.

[0025] In this embodiment, the valve seat 3 is provided with a glue discharge channel 34 connected to the glue storage groove 32. With this structure, the glue discharge channel 34 is usually in a blocked state, and the stored glue oil can be discharged by opening the glue discharge channel 34 when the equipment is shut down.

[0026] In this embodiment, a valve plate accommodating chamber 13 for accommodating the valve plate 2 when the valve plate 2 is in a raised state is provided in the valve body 1 above the air outlet 12, and an openable and closable rubber baffle plate 6 is provided at the bottom of the valve plate accommodating chamber 13. With this structure, when the valve is in an open state, the rubber baffle plate 6 can isolate the valve plate 2 in the valve plate accommodating chamber 13, reduce the accumulation of rubber oil at the bottom of the valve plate 2, and further ensure that the valve plate 2 and the valve seat 3 have good sealing performance.

[0027] In this embodiment, the rubber baffle plate 6 is hinged to the valve body 1, and a tension spring 7 is provided between the rubber baffle plate 6 and the valve body 1, which can pull up the rubber baffle plate 6 to close the valve plate accommodating cavity 13 when the valve plate 2 is located in the valve plate accommodating cavity 13. With this structure, when the valve plate 2 is located in the valve plate accommodating cavity 13, the rubber baffle plate 6 is in a closed state under the action of the tension spring 7, and when the valve body 1 moves down and approaches the valve seat 3, the rubber baffle plate 6 will be opened under the action of the driving cylinder 4.

[0028] In this embodiment, the valve plate 2 is provided with abutment portion 24 which can abut against the rubber baffle plate 6 to keep the rubber baffle plate 6 in an open state when the valve plate 2 is sealed and connected to the valve seat 3. With this structure, the rubber baffle plate 6 can be better fixed when the valve plate 2 is pressed down.

[0029] In this embodiment, the rubber baffle plate 6 is provided with a pulley 61 that can contact and connect with the abutment portion 24 when the valve plate 2 is sealed and connected with the valve seat 3. Through this structure, the friction between the valve plate 2 and the rubber baffle plate 6 is reduced, so that the foot baffle plate can be opened and closed better.

[0030] Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the art can use the above disclosed technical content to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A vacuum baffle valve, comprising a valve body (1), a valve plate (2), a valve seat (3), and a drive cylinder (4), wherein the valve body (1) comprises an air inlet (11) and an air outlet (12), the valve seat (3) is fixedly connected to the air inlet (11), and the valve plate (2) is fixedly connected to a telescopic rod (41) of the drive cylinder (4), characterized in that: The surface of the valve plate (2) facing the valve seat (3) is provided with a conical groove (21), and the valve seat (3) is provided with a conical protrusion (31) which can scrape off the rubber on the surface of the conical groove (21) during the process of the valve body (1) and the valve seat (3) being fitted and sealed, and can be fitted and sealed with the conical groove (21), and a rubber storage groove (32) for storing rubber is provided in the middle of the conical protrusion (31), and an outer wall for blocking the rubber and an inner wall for air intake are provided in the middle of the rubber storage groove (32).

2. The vacuum baffle valve according to claim 1, characterized in that: The valve plate (2) is provided with a rubber stop tube accommodating cavity (22) for accommodating the rubber stop tube (33) in the middle of the conical groove (21); the conical groove (21), the conical protrusion (31), the rubber storage groove (32) and the rubber stop tube (33) are all arranged coaxially with the telescopic rod (41); the conical groove (21) includes a sealing inclined surface, and an annular dovetail groove (23) is arranged on the sealing inclined surface; a sealing ring (5) is embedded and connected in the dovetail groove (23).

3. The vacuum baffle valve according to claim 1, characterized in that: The valve seat (3) is provided with a glue discharge channel (34) which is connected to the glue storage groove (32).

4. The vacuum baffle valve according to claim 1, characterized in that: A valve plate accommodating chamber (13) is provided in the valve body (1) above the air outlet (12) for accommodating the valve plate (2) when the valve plate (2) is in a raised state, and an openable and closable rubber baffle (6) is provided at the bottom of the valve plate accommodating chamber (13).

5. The vacuum baffle valve according to claim 4, characterized in that: The rubber baffle plate (6) is hinged to the valve body (1), and a tension spring (7) is provided between the rubber baffle plate (6) and the valve body (1) for pulling up the rubber baffle plate (6) to close the valve plate accommodating cavity (13) when the valve plate (2) is located in the valve plate accommodating cavity (13).

6. The vacuum baffle valve according to claim 5, characterized in that: The valve plate (2) is provided with abutment portion (24) which can abut against the rubber baffle plate (6) to keep the rubber baffle plate (6) in an open state when the valve plate (2) is sealed and connected to the valve seat (3).

7. The vacuum baffle valve according to claim 6, characterized in that: The rubber baffle plate (6) is provided with a pulley (61) which can be in contact and connected with the abutment portion (24) when the valve plate (2) and the valve seat (3) are sealed and connected.

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