Tank top assembly vacuum valve

Abstract

The utility model relates to the technical field of vacuum valves, in particular to a tank top assembly vacuum valve which comprises a valve body and an installation shell communicated with the valve body, a valve rod and a valve clack are coaxially arranged in the installation shell, the valve rod is fixedly connected with the valve clack, a plurality of air inlets are formed in the installation shell, filter screens are arranged on the air inlets, and the filter screens are fixedly connected with the valve rod. A mounting plate is coaxially arranged on the outer side of the mounting shell, a moving groove is formed between the mounting plate and the mounting shell, and a dust removal mechanism is arranged in the moving groove. Dust accumulated on the filter screen is brushed to the bottom of the moving groove through cooperation of the filter screen, the electric push rod, an annular plate, a brush, the moving groove and a suction pipe; and in addition, an exhaust fan is communicated with a suction pipe, dust falling on the bottom of the moving groove can be conveniently adsorbed through the suction pipe, the situation that the filter screen is inconvenient to clean by workers due to the fact that the height of the tank body is large is avoided, and operation is easy, convenient and fast.

Description

Technical Field

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

[0002] A vacuum valve is a vacuum system component used to change the direction of airflow, adjust the amount of airflow, and cut off or connect pipelines in a vacuum system. The closing part of a vacuum valve is sealed with a rubber seal or a metal seal. The structure of a vacuum valve consists of a valve body, a valve, a seal, and a transmission device. The materials of the valve body and the valve can be selected from different materials according to different usage scenarios. The sealing structure of the vacuum valve is relatively important and needs to ensure efficient sealing in a high vacuum or ultra-high vacuum environment. Its working principle is to pull up or close the valve core to control the circulating gas or liquid. It is usually used in fermentation tanks to prevent negative pressure in the tank body and balance the external air pressure with the internal air pressure.

[0003] At present, a Chinese utility model patent application with a publication date of January 30, 2013 and a publication number of CN202708105U proposes a vacuum valve. The valve body of the vacuum valve is arranged in a spherical structure, which makes the entire vacuum valve more beautiful. Under low temperature conditions, the gas inside the cylinder cavity may freeze and cause the valve flap to be unable to open. At this time, the cylinder cavity can be inflated through an air nozzle to force the valve flap to open;

[0004] However, when the tank top assembly balances the air pressure in the tank, outside air needs to enter the vacuum valve. The factory ambient air will carry dust particles. The dust particles fall onto the contact surface between the valve disc and the valve seat, cushioning the valve disc and creating a gap between the valve disc and the valve body, thus causing the vacuum valve to leak. For this reason, we designed a tank top assembly vacuum valve. Utility Model Content

[0005] The utility model aims to solve the problem in the prior art that when the vacuum valve is working, dust particles entrained in the outside air will enter the valve body, causing a gap between the valve disc and the valve body, thereby causing the vacuum valve to leak, and proposes a tank top assembly vacuum valve.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The tank top assembly vacuum valve comprises a valve body and an installation shell connected to the valve body, a valve stem and a valve disc are coaxially arranged in the installation shell, the valve stem and the valve disc are fixedly connected, a sealing gasket is arranged on the inner wall of the valve body, a side of the valve disc close to the valve stem is in contact with the sealing gasket, and a plurality of air inlets are opened on the installation shell.

[0008] When the pressure inside the fermentation tank is much lower than the external air pressure, the external gas enters the installation shell through the air inlet on the installation shell. At this time, the air pressure inside the installation shell is greater than the air pressure inside the valve body. The air pressure inside the installation shell squeezes the valve disc downward to break away from the contact with the sealing gasket, and then enters the fermentation tank through the valve body, balancing the air pressure inside the tank and avoiding damage to the fermentation tank equipment.

[0009] A filter is provided on the air inlet, a mounting plate is coaxially provided on the outer side of the mounting shell, a movable groove is provided between the mounting plate and the mounting shell, a dust cleaning mechanism is provided in the movable groove, and the dust cleaning mechanism is used for automatically removing dust accumulated on the filter to avoid inconvenience for staff to clean the filter due to the high height of the tank body. The operation is simple and convenient, and dust particles are prevented from entering the vacuum valve connecting cavity, thereby improving the service life of the vacuum valve.

[0010] Optionally, the dust cleaning mechanism comprises an electric push rod, a slider and an annular plate, the electric push rod is fixedly mounted on the mounting housing, the output end of the electric push rod is fixedly connected to the slider, and the slider is fixedly connected to the annular plate;

[0011] A brush and a suction pipe, wherein the brush is arranged on a surface of the annular plate close to the filter screen, and the suction pipe is arranged on the side wall of the mounting plate, and the suction pipe is communicated with the movable groove.

[0012] By adopting the above technical solution, the annular plate is pushed to move on the inner wall of the mounting plate through the output end of the electric push rod. Since a brush is provided on the side of the annular plate close to the filter, and the brush is in contact with the filter, as the annular plate moves in the moving groove of the mounting plate, the dust accumulated on the filter is brushed off to the bottom of the moving groove, thereby preventing dust from accumulating and adhering to the filter and affecting the gas flow of external gas entering the mounting shell. Since dust particles are carried in the ambient air of the factory building, dust particles are prevented from falling on the contact surface of the valve disc and the valve seat, which will cushion the valve disc and cause a gap between the valve disc and the valve body, thereby causing the vacuum valve to leak.

[0013] Optionally, a first sealing rubber pad is provided at a connection between the valve body and the mounting shell, the valve flap is located in the valve body, and a width of the valve flap is greater than a width of a connection between the valve body and the mounting shell.

[0014] By adopting the above technical solution, the valve disc can play a one-way opening and closing role. The gas in the installation shell squeezes the valve disc downward to break away from the contact with the sealing gasket, thereby allowing external gas to enter the valve body and balance the air pressure outside and inside the fermentation tank.

[0015] Optionally, a sliding groove is provided on a surface of the mounting plate close to the mounting shell.

[0016] By adopting the above technical solution, through the cooperation of the slider and the slide groove, a limiting effect is achieved on the annular plate, so that the annular plate has only the freedom to move up and down in the moving groove.

[0017] Optionally, the suction pipe is located at the bottom of the movable groove, a connecting pipe is connected to the suction pipe, and an end of the circulation pipe away from the suction pipe is connected to an exhaust fan.

[0018] By adopting the above technical solution, the dust brushed to the bottom of the mobile trough is sucked and adsorbed by the exhaust fan, and the staff does not need to clean the filter again. The operation is simple and convenient, and it is avoided that the staff is inconvenient to clean the filter due to the high height of the tank body, and dust particles are prevented from entering the vacuum valve connecting cavity, thereby increasing the service life of the vacuum valve.

[0019] Optionally, a connecting disk is coaxially provided at one end of the valve body away from the mounting shell, a first connecting pipe is coaxially connected to the connecting disk, a second sealing rubber gasket is provided between the connecting disk and the first connecting pipe, a second connecting pipe and a third connecting pipe are connected to the valve body, and a fourth connecting pipe is connected to the mounting shell.

[0020] By adopting the above technical solution, multiple connecting pipes are used to connect various pipelines and components. At the same time, solenoid valves are provided on the first connecting pipe, the second connecting pipe, the third connecting pipe and the fourth connecting pipe, which has a wide range of applications.

[0021] The beneficial effects of the utility model are:

[0022] 1. The utility model uses the cooperation of the filter, electric push rod, annular plate, brush, mobile trough and suction pipe to brush the dust accumulated on the filter to the bottom of the mobile trough. In addition, by connecting the suction pipe to the exhaust fan, the dust falling on the bottom of the mobile trough can be adsorbed through the suction pipe, avoiding the inconvenience of the staff to clean the filter due to the high height of the tank body. The operation is simple and convenient, avoiding the dust particles from entering the vacuum valve connecting cavity, and improving the service life of the vacuum valve.

[0023] 2. In the utility model, when the pressure inside the fermentation tank is much lower than the external air pressure, the external gas enters the installation shell through the air inlet on the installation shell. At this time, the air pressure inside the installation shell is greater than the air pressure inside the valve body. The air pressure inside the installation shell squeezes the valve disc downward to break away from the contact with the sealing gasket, and then enters the fermentation tank through the valve body, balancing the air pressure inside the tank and avoiding damage to the fermentation tank equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the vacuum valve of the tank top assembly proposed by the utility model;

[0025] Figure 2This is a schematic diagram of the installation structure of the installation housing and the dust cleaning mechanism of the tank top assembly vacuum valve proposed by the utility model;

[0026] Figure 3 This is a schematic diagram of the internal structure of the vacuum valve of the tank top assembly proposed by the utility model;

[0027] Figure 4 This is a schematic diagram of the dust cleaning mechanism of the vacuum valve of the tank top assembly proposed by the utility model;

[0028] Figure 5 for Figure 2 A magnified schematic diagram of part A in FIG.

[0029] In the figure: 1. valve body; 2. mounting shell; 3. valve stem; 4. valve disc; 5. air inlet; 6. filter screen; 7. mounting plate; 8. slide groove; 9. electric push rod; 10. slider; 11. annular plate; 12. brush; 13. suction pipe; 14. connecting plate; 15. first connecting pipe; 16. second connecting pipe; 17. third connecting pipe; 18. fourth connecting pipe; 19. sealing gasket. DETAILED DESCRIPTION

[0030] Reference Figure 1-Figure 5 , the tank top assembly vacuum valve comprises a valve body 1 and a mounting shell 2 connected with the valve body 1, a valve stem 3 and a valve disc 4 are coaxially arranged in the mounting shell 2, the valve stem 3 is fixedly connected to the valve disc 4, a sealing gasket 19 is arranged on the inner wall of the valve body 1, and a side of the valve disc 4 close to the valve stem 3 contacts the sealing gasket 19, a plurality of air inlets 5 are opened on the mounting shell 2, and a filter screen 6 is arranged on the air inlet 5. The effect of such arrangement is that when the pressure in the fermentation tank body is much lower than the external air pressure, the external gas enters the mounting shell 2 through the air inlet 5 on the mounting shell 2. At this time, the air pressure in the mounting shell 2 is greater than the air pressure in the valve body 1, and the air pressure in the mounting shell 2 squeezes the valve disc 4 downward to break away from the contact with the sealing gasket 19, and then enters the fermentation tank body through the valve body 1, balances the air pressure in the tank body, and avoids damage to the fermentation tank equipment;

[0031] Reference Figure 2 and Figure 5 A mounting plate 7 is coaxially arranged on the outer side of the mounting shell 2, a movable groove is arranged between the mounting plate 7 and the mounting shell 2, and a dust cleaning mechanism is arranged in the movable groove, and the dust cleaning mechanism is used to automatically remove the dust accumulated on the filter screen 6;

[0032] The cleaning mechanism includes an electric push rod 9, a slider 10 and an annular plate 11. The electric push rod 9 is fixedly installed on the mounting shell 2. The output end of the electric push rod 9 is fixedly connected to the slider 10, and the slider 10 is fixedly connected to the annular plate 11. The brush 12 is arranged on the side of the annular plate 11 close to the filter 6. The suction pipe 13 is arranged on the side wall of the mounting plate 7. The suction pipe 13 is connected to the movable groove. The annular plate 11 is pushed to move on the inner wall of the mounting plate 7 by the output end of the electric push rod 9. Since the brush 12 is arranged on the side of the annular plate 11 close to the filter 6, and the brush 12 is in contact with the filter 6, as the annular plate 11 moves in the movable groove of the mounting plate 7, the dust accumulated on the filter 6 is brushed off to the bottom of the movable groove to prevent the dust from accumulating and adhering to the filter 6.

[0033] Reference Figure 3 A first sealing rubber pad is provided at the connection between the valve body 1 and the mounting shell 2, and the valve flap 4 is located in the valve body 1. The width of the valve flap 4 is greater than the width of the connection between the valve body 1 and the mounting shell 2. The effect of this arrangement is to facilitate the valve flap 4 to play a one-way opening and closing role. The gas in the mounting shell 2 squeezes the valve flap 4 downward to break away from the contact with the sealing pad 19, and then enters the valve body 1.

[0034] Reference Figure 3 and Figure 4 A slide groove 8 is provided on the side of the mounting plate 7 close to the mounting shell 2. Through the cooperation of the slider 10 and the slide groove 8, the annular plate 11 only has the freedom to move up and down in the movable groove. The suction pipe 13 is located at the bottom of the movable groove. A connecting pipe is connected to the suction pipe 13, and the end of the flow pipe away from the suction pipe 13 is connected to the exhaust fan. The effect of this arrangement is to facilitate the suction and adsorption of dust that has been brushed to the bottom of the movable groove by the exhaust fan, and the staff does not need to clean the filter 6 again, and the operation is simple and convenient.

[0035] Reference Figure 1 and Figure 3 A connecting plate 14 is coaxially provided at one end of the valve body 1 away from the mounting shell 2, and a first connecting pipe 15 is coaxially connected to the connecting plate 14. A second sealing rubber pad is provided between the connecting plate 14 and the first connecting pipe 15. A second connecting pipe 16 and a third connecting pipe 17 are connected to the valve body 1, and a fourth connecting pipe 18 is connected to the mounting shell 2. The effect of such an arrangement is to facilitate the connection with various pipelines and components through multiple connecting pipes. At the same time, solenoid valves are provided on the first connecting pipe 15, the second connecting pipe 16, the third connecting pipe 17 and the fourth connecting pipe 18, which have a wide range of applications.

[0036] The working principle of the utility model is as follows:

[0037] When the pressure inside the fermentation tank is much lower than the external air pressure, the external air enters the installation shell 2 through the air inlet 5 on the installation shell 2. At this time, the air pressure inside the installation shell 2 is greater than the air pressure inside the valve body 1. The air pressure inside the installation shell 2 pushes the valve disc 4 downward to break away from the contact with the sealing gasket 19, and then enters the fermentation tank through the valve body 1 to balance the air pressure inside the tank.

[0038] By setting the filter 6 at the air inlet 5, as the equipment works for a long time, dust will accumulate on the side of the filter 6 away from the inside of the valve body 1 under the flow of air, and the annular plate 11 is pushed to move on the inner wall of the mounting plate 7 by the output end of the electric push rod 9. Since a brush 12 is provided on the side of the annular plate 11 close to the filter 6, and the brush 12 is in contact with the filter 6, as the annular plate 11 moves in the moving groove of the mounting plate 7, the dust accumulated on the filter 6 is brushed and dropped to the bottom of the moving groove, and the exhaust fan is connected to the suction pipe 13 to suck and adsorb the dust falling on the bottom of the moving groove.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A tank top assembly vacuum valve, comprising a valve body (1) and a mounting housing (2) connected to the valve body (1), characterized in that: A valve stem (3) and a valve flap (4) are coaxially arranged in the installation shell (2), the valve stem (3) and the valve flap (4) are fixedly connected, a sealing gasket (19) is arranged on the inner wall of the valve body (1), and a side of the valve flap (4) close to the valve stem (3) contacts the sealing gasket (19), a plurality of air inlets (5) are opened on the installation shell (2), a filter screen (6) is arranged on the air inlet (5), a mounting plate (7) is coaxially arranged on the outer side of the installation shell (2), a movable groove is arranged between the mounting plate (7) and the installation shell (2), and a dust cleaning mechanism for automatically removing dust accumulated on the filter screen (6) is arranged in the movable groove.

2. The tank top assembly vacuum valve according to claim 1, characterized in that: A first sealing rubber pad is provided at the connection between the valve body (1) and the mounting shell (2); the valve flap (4) is located inside the valve body (1); and the width of the valve flap (4) is greater than the width of the connection between the valve body (1) and the mounting shell (2).

3. The tank top assembly vacuum valve according to claim 1, characterized in that: A sliding groove (8) is provided on a surface of the mounting plate (7) close to the mounting shell (2).

4. The tank top assembly vacuum valve according to claim 3, characterized in that: The dust cleaning mechanism comprises: An electric push rod (9), a slider (10), an annular plate (11), a brush (12) and a suction pipe (13), wherein the electric push rod (9) is fixedly mounted on the mounting housing (2), an output end of the electric push rod (9) is fixedly connected to the slider (10), and the slider (10) is fixedly connected to the annular plate (11); The brush (12) is arranged on a surface of the annular plate (11) close to the filter screen (6), the suction pipe (13) is arranged on the side wall of the mounting plate (7), and the suction pipe (13) is connected to the movable groove.

5. The tank top assembly vacuum valve according to claim 4, characterized in that: The suction pipe (13) is located at the bottom of the movable groove, and a connecting pipe is connected to the suction pipe (13). One end of the connecting pipe away from the suction pipe (13) is connected to an exhaust fan.

6. The tank top assembly vacuum valve according to claim 1, characterized in that: A connecting disk (14) is coaxially provided at one end of the valve body (1) away from the mounting shell (2); a first connecting pipe (15) is coaxially connected to the connecting disk (14); a second sealing rubber gasket is provided between the connecting disk (14) and the first connecting pipe (15); and a second connecting pipe (16) and a third connecting pipe (17) are connected to the valve body (1).

7. The tank top assembly vacuum valve according to claim 1, characterized in that: The installation shell (2) is connected with a fourth connecting pipe (18).

Images