Self-control flat plate sealing valve

Abstract

The invention belongs to the technical field of valves, and provides a self-control flat plate sealing valve. Comprising a walking mechanism, a sealing mechanism, a sweeping mechanism, a control cabinet and an air pump. The traveling mechanism comprises a track, a trolley, a front travel switch, a rear travel switch and a traveling motor; the front travel switch and the rear travel switch are respectively arranged on the track in front of and behind the trolley; the sealing mechanism comprises an air spring, a sealing valve face, a pressure sensor and a position switch, the upper end and the lower end of the air spring are fixed to the bottom face of the sealing valve face and the trolley through flanges respectively, the air spring is driven by an air pump, the pressure sensor is arranged at an air inlet of the air spring, and the position switch is arranged on the outer side of the air spring. The sweeping mechanism comprises a support, a scraping plate, a sweeping roller and a sweeping motor. According to the self-control flat plate sealing valve, the sealing face of the valve body can be automatically cleaned, it is ensured that after long-term use, the good sealing effect is still achieved, and leakage of the valve body is eradicated.

Description

Technical Field

[0001] The invention belongs to the technical field of valves, and in particular relates to an automatic control flat plate sealing valve. Background Art

[0002] The discharge port of a large tank is generally arranged at the bottom of the tank, in order to facilitate the use of gravity or spiral discharge of materials, save energy and facilitate operation; a sealing valve is usually arranged at the discharge port to control the opening and closing of the discharge port. Common sealing valves include gate valves, stop valves, ball valves and butterfly valves. For opening and closing discharge ports with larger diameters, gate valves are usually used. Gate valves can be divided into single gate plates and double gate plates, wedge gate plates and parallel gate plates, etc. The gate valve has a large nominal diameter span and is suitable for opening and closing discharge ports with larger diameters. For example, the blind plate seal used in the discharge port of the existing papermaking raw material prepreg bin is used. The blind plate and the discharge port flange are fastened with a circle of bolts. The opening method is to unscrew the nut and remove the lower blind plate to open the discharge port. When sealing, the blind plate is plugged with bolts to fasten the connection, which is time-consuming and laborious.

[0003] In the selection and use of gate valves, the inventors found that no matter which type of gate valve is used, when the material has a certain adhesion, the sealing valve surface of the valve body will be bonded by the material after long-term use, resulting in an uneven valve surface, which makes the sealing of the valve surface unable to seal the discharge port. It needs to be manually cleaned before it can be used normally, which is time-consuming and laborious. The reason is that the gate valves currently used do not have an automatic cleaning function and become dirty over time. Therefore, it is necessary to design a new gate valve to adapt to the bottom discharge port of the existing large tank body to prevent the material from sticking after long-term use, resulting in leakage caused by poor sealing of the valve body. Summary of the invention

[0004] After years of exploration and research, the inventor aims to propose an automatic flat-plate sealing valve that can automatically clean the valve body sealing surface, thereby ensuring that it still has a good sealing effect after long-term use and preventing valve body leakage.

[0005] The technical scheme adopted by the invention to achieve its purpose is: designing an automatic flat sealing valve, including a walking mechanism, a sealing mechanism, a cleaning mechanism, a control cabinet, and an air pump; the walking mechanism includes a track, a trolley, a front travel switch, a rear travel switch, and a walking motor, the walking motor is connected to the wheel of the trolley by transmission, the trolley moves along the track, and the front travel switch and the rear travel switch are respectively arranged on the track in front and behind the trolley; the sealing mechanism is arranged on the trolley, the sealing mechanism includes an air spring, a sealing valve surface, a pressure sensor, and a position switch, the upper and lower ends of the air spring are respectively fixed to the bottom surface of the sealing valve surface and the trolley through flanges, the air spring is driven by an air pump, the pressure sensor is arranged at the air inlet of the air spring, and the position switch is arranged outside the air spring; the cleaning mechanism includes a bracket, a scraper, a cleaning roller, and a cleaning motor, the scraper and the cleaning roller are sequentially arranged in the direction of travel of the trolley through the bracket; the front travel switch, the rear travel switch, the walking motor, the air pump, the pressure sensor, the position switch, and the cleaning motor are all electrically connected to the control cabinet.

[0006] Furthermore, the scraper is 2-3 cm away from the upper surface of the sealing valve surface, and the surface of the cleaning roller is covered with nylon bristles, which are in contact with the sealing valve surface.

[0007] Furthermore, the air spring is externally sleeved with inner and outer sleeves, the inner sleeve is fixed to the trolley, and the outer sleeve is fixed to the sealing valve surface.

[0008] Furthermore, a locking bolt is provided between the inner and outer sleeves.

[0009] Furthermore, the sealing valve surface is composed of a flat plate layer and a sealing gasket, and the sealing gasket is bonded to the flat plate layer.

[0010] When in use, under the automatic control of the preset program of the control cabinet, the opening process of the automatic flat sealing valve created by the present invention is as follows: the control cabinet controls the position conversion of the solenoid valve in the air pump, the air spring begins to release pressure and lowers the height downward, the sealing valve surface and the discharge port are quickly separated, the material begins to be discharged from the discharge port, the air spring continues to shrink downward until the position switch detects a signal and feeds the signal back to the control cabinet, the control cabinet controls the walking motor to start, the trolley drives the sealing mechanism to move forward, and at the same time the control cabinet controls the cleaning motor to start, the cleaning roller starts to rotate, when the sealing valve surface passes through the scraper, the scraper scrapes off the large pieces of material, for example, the material in the prepreg bin for papermaking is mostly wood chips, that is, the wood chips on the sealing valve surface are scraped off, when the sealing valve surface passes through the cleaning roller, the cleaning roller sweeps away the fine stains on the surface of the sealing valve surface, thereby maintaining the sealing of the sealing valve surface, when the trolley wheel touches the front When the travel switch is on, the control cabinet receives the signal to stop the trolley until the discharge port is discharged. When the system needs the sealing valve to seal, the control cabinet controls the trolley to reset backward. When passing the scraper and the cleaning roller, the scraper and the cleaning roller clean the sealing valve surface again. When the wheel of the trolley touches the rear travel switch, the trolley stops. At the same time, the control cabinet receives the signal and controls the solenoid valve position conversion in the air pump to inflate the air spring. The air spring begins to rise, and the sealing valve surface quickly presses the discharge port. At this time, the pressure sensor detects the pressure value in the air spring in real time. After the pressure value reaches the preset value, the control cabinet controls the solenoid valve position conversion in the air pump to cut off the air path. At this time, the pressure in the air spring is constant. If there is a slight leakage during the long-term air pressure maintenance process, the pressure sensor notifies the solenoid valve to open and replenish the pressure to a constant value until the next valve opening action. The present invention creates an automatic flat sealing valve that can automatically clean the valve body sealing surface, thereby ensuring that it still has a good sealing effect after long-term use and preventing valve body leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the sealing mechanism structure in the present invention. Implementation

[0012] The invention will be further described below in conjunction with the accompanying drawings and embodiments, and its structure and advantages will become more clear.

[0013] Embodiment 1, see Figure 1 , Figure 2, an automatic flat sealing valve, including a walking mechanism, a sealing mechanism, a cleaning mechanism, a control cabinet, and an air pump; the walking mechanism includes a track 1, a trolley 2, a front travel switch 3, a rear travel switch 4, and a walking motor 5, the walking motor 5 is connected to the wheel of the trolley 2 by driving, the trolley 2 moves along the track 1, the front travel switch 3 and the rear travel switch 4 are respectively arranged on the track 1 in front of and behind the trolley 2; the sealing mechanism is arranged on the trolley 2, the sealing mechanism includes an air spring 6, a sealing valve surface 7, a pressure sensor 8, a position switch 9, the air spring 6 The upper and lower ends are fixed to the bottom surface of the sealing valve surface 7 and the trolley 2 through flanges 10 respectively, the air spring 6 is driven by an air pump, the pressure sensor 8 is arranged at the air inlet 11 of the air spring 6, and the position switch 9 is arranged on the outside of the air spring 6; the cleaning mechanism includes a bracket, a scraper 12, a cleaning roller 13, and a cleaning motor, and the scraper 12 and the cleaning roller 13 are sequentially arranged in the direction of travel of the trolley 2 through the bracket; the front travel switch 3, the rear travel switch 4, the travel motor 5, the air pump, the pressure sensor 8, the position switch 9, and the cleaning motor are all electrically connected to the control cabinet.

[0014] Embodiment 2, based on the structure of embodiment 1, further comprises: the scraper 12 is 2-3 cm away from the upper surface of the sealing valve surface 7, the surface of the cleaning roller 13 is covered with nylon bristles, and the nylon bristles are in contact with the sealing valve surface 7. The scraper 12 is used to scrape off larger residual materials on the sealing valve surface 7, and the nylon bristles of the cleaning roller 13 are used to further clean smaller residual materials on the sealing valve surface 7, and the relatively soft nylon bristles will not damage the sealing valve surface 7.

[0015] Embodiment 3, based on the structure of embodiment 1, further includes: the air spring 6 is externally sleeved with inner and outer sleeves 14 and 15, the inner sleeve 14 is fixed to the trolley 2, and the outer sleeve 15 is fixed to the sealing valve surface 7. The purpose of the sleeve is to protect the air spring 6 from erosion by materials and maintain long-term excellent performance.

[0016] Embodiment 4, based on the structure of embodiment 3, further comprises: a locking bolt 19 is provided between the inner and outer sleeves 14, 15. The locking bolt 19 can relatively fix the inner and outer sleeves 14, 15, and is used as a secondary insurance to prevent the valve from accidentally opening uncontrollably after the air spring 6 leaks accidentally.

[0017] Embodiment 5, based on the structure of embodiment 1, further comprises: the sealing valve surface 7 is composed of a flat layer 18 and a sealing gasket 17, and the sealing gasket 17 is bonded to the flat layer 18. The sealing gasket 17 is elastic enough to better wrap the discharge port under pressure and improve the sealing performance.

[0018] The present invention creates an automatic flat sealing valve capable of automatically cleaning the sealing surface of a valve body, thereby ensuring that the valve body still has a good sealing effect after long-term use and preventing leakage of the valve body.

[0019] Although the invention is described in detail above, the invention is not limited to the above-mentioned air spring type specific implementation. The above-mentioned specific implementation is only illustrative and not restrictive. Under the inspiration of the invention and without departing from the purpose of the invention, those skilled in the art can also make many variations, which are all within the protection of the invention.

Claims

1. An automatic flat sealing valve, characterized by: Including walking Mechanism, sealing mechanism, cleaning mechanism and control cabinet, air pump; the walking mechanism includes track, trolley, front travel switch, rear travel switch and walking motor, the walking motor is connected with the wheel of the trolley by driving, the trolley moves along the track, the front travel switch and rear travel switch are respectively arranged on the track in front and rear of the trolley; the sealing mechanism is arranged on the trolley, the sealing mechanism includes air spring, sealing valve surface, pressure sensor and position switch, the upper and lower ends of the air spring are respectively fixed to the bottom surface of the sealing valve surface and the trolley by flanges, the air spring is driven by the air pump, the pressure sensor is arranged at the air inlet of the air spring, and the position switch is arranged on the outside of the air spring; the cleaning mechanism includes bracket, scraper, cleaning roller and cleaning motor, the scraper and cleaning roller are arranged in sequence in the direction of travel of the trolley through the bracket; the front travel switch, rear travel switch, walking motor, air pump, pressure sensor, position switch and cleaning motor are all electrically connected to the control cabinet.

2. The automatic flat sealing valve according to claim 1, characterized in that: The scraper is 2-3 cm away from the upper surface of the sealing valve surface, and the surface of the cleaning roller is covered with nylon bristles, which are in contact with the sealing valve surface.

3. The automatic flat sealing valve according to claim 1, characterized in that: The air spring is externally sleeved with an inner sleeve and an outer sleeve, the inner sleeve is fixed to the trolley, and the outer sleeve is fixed to the sealing valve surface.

4. The automatic flat sealing valve according to claim 3, characterized in that: A locking bolt is arranged between the inner and outer sleeves.

5. The automatic flat sealing valve according to claim 1, characterized in that: The sealing valve surface is composed of a flat plate layer and a sealing gasket, and the sealing gasket is bonded to the flat plate layer.

Images