A control system and control method for a dome valve

Abstract

A control system and a control method for a dome valve provided by the present invention are used for the electric control part of the dome valve in a material conveying system. When the valve is opened or closed, first, the "open / close feedback" signal and the "sealing ring pressure" signal on the synchronous shaft are collected. Then, after the main control unit analyzes, logically calculates, statistically processes, and delays these signals, control instructions are output to perform actions such as opening and closing the valve and charging and discharging air from the sealing ring. At the same time, a fault display LED indicator is integrated on the circuit board, which can quickly prompt the type of fault, and the actual state of the valve can be monitored in real time through the operation display unit on the side.

Description

Technical Field

[0001] The present invention relates to a material conveying system of a power plant, and specifically to a control system and a control method for a dome valve. Background Art

[0002] Due to technical advantages such as good airtightness, no jamming, high temperature resistance, and soft seal of the dome valve, the loading valve (ash discharge valve) and the discharge valve in the domestic material conveying system currently generally use dome valves, and local control boxes are arranged on-site, and the pneumatic part is often placed outside the local control box.

[0003] Due to the relatively harsh actual working conditions on-site (high temperature, dust, etc.), the pneumatic part is easily corroded by fly ash without sealed protection. When there is a slight air leakage in the air circuit, dust easily enters the cylinder of the dome valve, seriously affecting the normal operation of the dome valve. In addition, there is generally only one feedback signal in the local control box, that is, the inflation pressure signal of the sealing ring of the dome valve, and there is no full-open and full-close feedback signal of the dome valve. This will form an open-loop control for the dome valve, that is, due to the inability to timely monitor the actual switch-in-place signal of the valve, the dome valve is inflated in advance and the sealing ring is squeezed and broken; and when the sealing ring is damaged, the real cause of the damage cannot be accurately located, analyzed, and prompted, that is, whether the damage of the sealing ring is caused by the open feedback or the close feedback. In this way, on-site maintenance personnel cannot make an intuitive judgment, which will inevitably prolong the maintenance time and thus affect the normal operation of the system. Summary of the Invention

[0004] Aiming at the problem that the existing local control box cannot monitor the opening or closing state of the dome valve in real time, the present invention provides a control system and a control method for a dome valve, realizing the closed-loop control of the opening and closing state of the dome valve, monitoring the opening and closing state of the dome valve in real time, improving the service life of the dome valve, and effectively ensuring the stable operation of the material conveying system.

[0005] The present invention is realized through the following technical solutions:

[0006] A control system for a dome valve includes a control device and a synchronous shaft;

[0007] One end of the synchronous shaft is connected to the control device, and the other end is connected to the valve body. The synchronous shaft rotates synchronously with the valve body;

[0008] The control device includes a main control unit, and a pneumatic unit and a signal acquisition unit connected thereto;

[0009] The signal acquisition unit is used to acquire the opening and closing state of the valve body and the pressure parameters of the inflation sealing ring on the valve body;

[0010] The pneumatic unit is used to control the opening and closing actions of the valve body and the inflation and deflation actions of the inflatable sealing ring on the valve body according to the output signal of the main control unit;

[0011] The main control unit is used to output the switch command of the valve body and the action command of the inflatable sealing ring, and output an alarm signal according to the pressure parameter of the inflatable sealing ring.

[0012] Preferably, the pneumatic unit includes a solenoid valve and a quick exhaust valve connected to the main control unit, and the solenoid valve includes a first solenoid valve and a second solenoid valve.

[0013] The cylinder is connected to the air source through the first solenoid valve;

[0014] The quick exhaust valve is connected to the air source through the second solenoid valve, and the quick exhaust valve is installed at the air inlet of the inflatable sealing ring.

[0015] Preferably, the acquisition unit includes a pressure switch and two microswitches;

[0016] The pressure switch is arranged on the air path of the inflatable sealing ring and connected to the main control unit for detecting the pressure parameter of the inflatable sealing ring;

[0017] The first microswitch and the second microswitch are respectively connected to the main control unit. A first convex block and a second convex block are arranged in the circumferential direction of the synchronous shaft. When the valve body is opened or closed, the first convex block and the second convex block alternately trigger the first microswitch and the second microswitch.

[0018] Preferably, the main control unit is arranged in the housing, one end of the synchronous shaft extends into the housing, and the first microswitch and the second microswitch are arranged around the synchronous shaft.

[0019] Preferably, a cylinder is further arranged between the synchronous shaft and the valve body. One end of the synchronous shaft is connected to the rotating shaft of the cylinder. The cylinder is connected to the valve body, and the cylinder is connected to the pneumatic unit.

[0020] The present invention also provides a control method for the control system of the above dome valve, including a control method for closing the valve body and a control method for opening the valve body;

[0021] The control method for closing the valve body includes the following steps:

[0022] Step 101, the main control unit inputs the action command of the first solenoid valve according to the valve closing command;

[0023] Step 102, the first solenoid valve controls the synchronous shaft and the valve body to rotate synchronously to close the valve body;

[0024] Step 103, when the valve body is closed, the first convex block triggers the corresponding microswitch, and the main control unit outputs the action command of the second solenoid valve according to the feedback signal of the microswitch;

[0025] Step 104: The second solenoid valve controls the inflation seal ring to inflate.

[0026] Step 105: The pressure switch detects the pressure of the inflation seal ring. When the set pressure is reached, the valve body is closed.

[0027] The control method for opening the valve body includes the following steps:

[0028] Step 201: The main control unit outputs an action instruction for the quick exhaust valve according to the valve opening instruction, and the quick exhaust valve exhausts.

[0029] Step 202: The main control unit obtains the pressure parameter of the inflation seal ring collected by the pressure switch. If the pressure parameter is less than the preset pressure, step 203 is executed.

[0030] Step 203: The main control unit outputs an action instruction for the first solenoid valve. The first solenoid valve controls the cylinder to rotate, and the cylinder drives the valve body to open. The synchronous shaft rotates synchronously with the valve body.

[0031] Step 204: When the second bump triggers the corresponding microswitch, the valve body opens.

[0032] Preferably, in step 103, when the main control unit does not receive the feedback signal from the microswitch, after a predetermined time delay, if the main control unit receives the feedback signal from the microswitch, it inputs an action instruction for the second solenoid valve.

[0033] When after a predetermined time delay, the main control unit still does not receive the feedback signal from the microswitch, the main control unit outputs an alarm signal and the valve body stops operating.

[0034] Preferably, in step 105, when the pressure of the inflation seal ring does not reach the set pressure, after a predetermined time delay, when the set pressure is reached, the valve body is closed.

[0035] When after a predetermined time delay, the set pressure is still not reached, the main control unit outputs a signal indicating that the inflation seal ring is damaged and the valve body stops operating.

[0036] Preferably, in step 202, when the pressure parameter is greater than the preset pressure, after a predetermined time delay, when the pressure parameter is less than the preset pressure, step 203 is executed.

[0037] When after a predetermined time delay, the pressure parameter is still greater than the preset pressure, the main control unit inputs an alarm signal and the valve stops operating.

[0038] Preferably, in step 204, when the main control unit does not receive the feedback signal from the microswitch, after a predetermined time delay, if the main control unit receives the feedback signal from the microswitch, the valve body opens.

[0039] After a preset delay time, if the feedback signal of the microswitch is still not received, the main control unit outputs an alarm signal and the valve body stops operating.

[0040] Compared with the prior art, the present invention has the following beneficial technical effects:

[0041] A control system for a dome valve provided by the present invention includes a main control unit, a pneumatic unit signal acquisition unit, and a synchronous shaft. The main control unit controls the operations of the valve and the inflatable seal through the pneumatic unit to open and close the valve. Meanwhile, through the signal acquisition unit and the synchronous shaft, the opening and closing states of the valve and the pressure parameters of the inflatable seal are checked and transmitted to the main control unit. The main control unit judges the opening and closing states of the valve based on the received information, monitors the state of the inflatable seal, and can output an alarm signal according to the collected parameters.

[0042] The present invention provides a control method for a control system of a dome valve. The main control unit controls the solenoid valve to operate according to an instruction. The solenoid valve controls the cylinder and the synchronous shaft to rotate simultaneously. When the valve body is fully opened or closed, the microswitch sends a feedback signal to the main control unit to monitor the opening and closing states of the valve body. Meanwhile, the main control unit performs inflation and deflation operations on the inflatable seal through a second solenoid valve and monitors the pressure of the inflatable seal. The main control unit judges the state of the inflatable seal based on the pressure parameters.

[0043] Furthermore, if the valve cannot be opened and closed normally, the main control unit will issue alarm instructions of "opening failure" and "closing failure", automatically cut off the operation of the valve, and display the fault code at the same time. On-site maintenance personnel can quickly locate the fault according to the fault code and perform fault handling, improving the maintenance efficiency of the equipment and reducing the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is the internal structure diagram of the control system of the present invention;

[0045] Figure 2 is the installation schematic diagram of the control system of the present invention and the valve body;

[0046] Figure 3 is the structural schematic diagram of the synchronous shaft of the present invention;

[0047] Figure 4 is the structural block diagram of the control system of the present invention;

[0048] Figure 5 is the pneumatic circuit structure diagram of the control system of the present invention;

[0049] Figure 6 is the control flow chart of the valve body opening process of the present invention;

[0050] Figure 7This is the control flow chart for the valve body closing process of the present invention.

[0051] In the figure: 1. Housing; 3. Cable lock head; 4. Main control unit; 5. Synchronous shaft; 6. Display unit; 7. Quick exhaust valve; 8. Solenoid valve; 9. Pressure switch; 10. Microswitch; 11. Rotary switch; 12. Bracket; 13. Cylinder; 14. Valve body;

[0052] 22. Rotating shaft; 21. First adjusting shaft; 22. Second adjusting shaft; 23. First limiting plate; 24. First cam ring; 25. Second limiting plate; 26. Second cam ring; 27. Spring; 28. Base plate. Specific embodiments

[0053] The present invention will be further described in detail below with reference to the accompanying drawings. The following is an explanation of the present invention rather than a limitation.

[0054] Refer to Figure 1-4 , a control system for a dome valve, including a control device and a synchronous shaft 5. One end of the synchronous shaft 5 is connected to the control device, and the other end is connected to one end of the rotating shaft of the cylinder 13. The other end of the rotating shaft of the cylinder 13 is connected to the valve body 14. The cylinder 13 is used to drive the valve body 14 to perform opening and closing actions. The synchronous shaft 5 rotates synchronously with the rotating shaft of the cylinder 13. The control device is installed on the cylinder 13 through the bracket 12.

[0055] The control device includes a main control unit, a pneumatic unit, and a signal acquisition unit; the main control unit is respectively connected to the signal acquisition unit and the pneumatic unit, and the pneumatic unit is respectively connected to the cylinder 13 and the inflation seal ring.

[0056] The signal acquisition unit is used to acquire the opening and closing state of the valve body 14 and the pressure parameters of the inflation seal ring on the valve body.

[0057] The pneumatic unit is used to control the opening and closing actions of the valve body and the inflation and deflation actions of the seal ring according to the output signal of the main control unit.

[0058] The main control unit is used to output a valve body opening and closing signal and an inflation and deflation signal according to the valve body opening and closing instruction, combined with the opening and closing state of the valve body and the pressure parameters of the inflation seal ring.

[0059] Refer to Figure 5 , the pneumatic unit includes a solenoid valve 8 and a quick exhaust valve 7 connected to the main control unit. The solenoid valve 8 includes a first solenoid valve and a second solenoid valve.

[0060] Among them, the cylinder 13 is connected to the air source through the first solenoid valve, and the quick exhaust valve 7 is connected to the air source through the second solenoid valve. The quick exhaust valve 7 is installed at the air inlet of the inflation seal ring. The main control unit respectively outputs control signals to control the actions of the quick exhaust valve 7 and the second solenoid valve.

[0061] For example, open the valve body, close the solenoid valve, open the exhaust port of the quick exhaust valve 7, close the air inlet, and exhaust the inflatable seal ring;

[0062] Close the valve body, open the solenoid valve, open the air inlet of the quick exhaust valve 7, close the exhaust port, and inflate the inflatable seal ring.

[0063] The acquisition unit includes a pressure switch and a micro switch. The pressure switch is arranged on the air path of the inflatable seal ring and is connected to the main control unit for detecting the pressure parameters of the inflatable seal ring.

[0064] The first micro switch and the second micro switch are respectively connected to the main control unit to respectively detect the open / closed state of the valve body. The first convex block and the second convex block are arranged in the circumferential direction of the synchronous shaft 5. When the valve body is in the closed state, the first convex block contacts the first micro switch and the second convex block separates from the second micro switch. On the contrary, when the valve body is in the open state, the first convex block separates from the first micro switch and the second convex block contacts the second micro switch.

[0065] The model of the micro switch is KM12-2.

[0066] The main control unit is arranged in the housing 1. The first micro switch and the second micro switch are arranged in the housing and are connected to the main control unit. One end of the synchronous shaft extends into the housing, and the first convex block and the second convex block are in the same plane as the two micro switches. When the synchronous shaft rotates, the first convex block and the second convex block can alternately trigger the two micro switches.

[0067] The first solenoid valve, the second solenoid valve, the quick exhaust valve 7 and the pressure switch 9 are respectively arranged in the housing. A cable gland 3 and a display unit 6 are also arranged on the side wall of the housing. The display unit 6 is connected to the main control unit 4. A knob switch is also arranged on the side wall of the housing for starting the control system.

[0068] Furthermore, due to the different specifications of the valve body, the rotation angles of the valve body during opening and closing are different. Therefore, when the first convex block and the second convex block on the synchronous shaft are fixed on the synchronous shaft, only the switch commands of the valve body with corresponding specifications can be detected. At the same time, when there is a deviation in the installation positions of the micro switch and the valve body, the first convex block and the second convex block installed in a fixed form cannot accurately detect the open / closed state of the valve body. To solve this problem, the present invention also designs an adjustable synchronous shaft. By adjusting the positions of the first convex block and the second convex block, the synchronous shaft can be applicable to any valve body and can accurately detect the open / closed state of the valve body. The specific structure is as follows:

[0069] Refer to again Figure 3, An adjustable synchronous shaft, comprising a rotating shaft 20, and two cam assemblies sleeved on the rotating shaft 20, namely a first cam assembly and a second cam assembly.

[0070] The cam assembly includes a cam ring, a limiting plate and an adjusting shaft.

[0071] The cam ring is of an annular structure, with bumps provided on the outer wall of the cam ring, internal teeth circumferentially provided on its inner wall, the limiting plate is fitted on the top of the cam ring, and the cam ring can rotate around the limiting plate. The limiting plate is fixedly sleeved on the rotating shaft, and there is a mounting hole on the limiting plate. The adjusting shaft is arranged on the limiting plate through the mounting hole, one end of it extends into the interior of the cam ring, and one end of it is located outside the limiting plate, and the adjusting shaft can move along the axial direction of the cam ring.

[0072] A gear is provided on the adjusting shaft, and the gear is always meshed with the cam ring. Rotating the adjusting shaft is used to adjust the axial position of the cam ring. A positioning mechanism is also provided on the limiting plate for circumferentially positioning the adjusting shaft.

[0073] When adjusting the position of the bump, move the adjusting shaft to separate the gear of the adjusting shaft from the positioning mechanism, and then rotate the adjusting shaft to drive the cam ring to rotate through the gear, completing the adjustment of the bump position.

[0074] For example, when the valve is in the closed state, rotate the cam ring through the adjusting shaft, thereby driving the bump to rotate until the bump triggers the microswitch, completing the adjustment of the bump position.

[0075] Refer to Figure 3 , The first cam assembly includes a first adjusting shaft 22, a first limiting plate 23, a first cam ring 24 and a first bump.

[0076] The first limiting plate 23 is fixedly sleeved on the rotating shaft 20, the first cam ring 24 is movably sleeved on the rotating shaft, an embedding step is provided at the end of the first cam ring 24, the first limiting plate 23 is fitted in the embedding step, the first adjusting shaft 22 is installed on the first limiting plate 23, and a gear is provided on the first adjusting shaft 22, and the gear is always meshed with the first cam ring 24.

[0077] The positioning mechanism is a gear hole, and the gear hole is located on one side of the first limiting plate 23 and the mounting hole of the first adjusting shaft 22, and this side is the side close to the first cam ring 24. A spring is sleeved on the end of the first adjusting shaft 22, and the lower end of the spring abuts against the second cam assembly.

[0078] The structure of the second cam assembly is the same as that of the first cam assembly, and the installation method with the rotating shaft is also the same. The second cam assembly includes a second adjusting shaft 23, a second limiting plate 25, and a second cam ring 26. At the bottom of the second cam assembly, a bottom plate 28 is further provided. The bottom plate 28 is fixedly sleeved on the rotating shaft. An embedding step is provided at the end of the second cam ring 26, and the bottom plate 28 is fitted in the embedding step.

[0079] The end of the first cam ring 24 abuts against the second limiting plate 25. The end of the first adjusting shaft 22 passes through the second limiting plate 25 and extends into the second cam ring 26, and abuts against the bottom plate 28 through a spring 27.

[0080] One end of the second adjusting shaft 22 abuts against the bottom plate 28 through a spring 27, and the other end sequentially passes through the second limiting plate 25 and the first limiting plate 23 and is located outside the first limiting plate 23.

[0081] At the ends of the first adjusting shaft 21 and the second adjusting shaft 22 located outside the first limiting plate 23, a clamping groove is provided, and the tool is stuck in the clamping groove, which is convenient for driving the pressing adjustment shaft and driving the adjustment shaft to rotate.

[0082] During adjustment, press the adjustment shaft, the spring is compressed, the gear of the adjustment shaft is separated from the gear hole, rotate the adjustment shaft under the compressed state, the adjustment shaft drives the cam ring to rotate through the gear, and the position of the convex block is adjusted. When the convex block contacts the microswitch, the adjustment is completed. Release the adjustment shaft, and the adjustment shaft resets under the action of the spring. The gear of the adjustment shaft enters the gear hole, the gear of the adjustment shaft meshes with the gear hole, and at the same time meshes with the internal teeth of the cam ring to limit the rotation of the cam ring.

[0083] Next, a control method of a control system of a dome valve provided by the present invention will be described in detail.

[0084] Refer to Figure 6 and 7 , a control method of a control system of a dome valve, including a control method for closing the valve body and a control method for opening the valve body:

[0085] The control method for closing the valve body includes the following steps:

[0086] Step 101, the main control unit outputs an action instruction for the first solenoid valve according to the valve closing instruction;

[0087] Step 102, the first solenoid valve controls the cylinder to rotate, the cylinder drives the valve body to close, and the synchronous shaft rotates synchronously with the valve body;

[0088] Step 103, when the valve body is closed, the first convex block triggers the corresponding microswitch, and the main control unit outputs an action instruction for the second solenoid valve according to the feedback signal of the microswitch;

[0089] When the main control unit does not receive the feedback signal from the microswitch, it delays for a predetermined time. After the delay of the predetermined time, if the main control unit receives the feedback signal from the microswitch, it inputs the action instruction for the second solenoid valve; after the delay of the predetermined time, if it still does not receive the feedback signal from the microswitch, the main control unit outputs an alarm signal and the valve body stops operating.

[0090] Step 104: The second solenoid valve controls the inflation seal ring to inflate.

[0091] Step 105: The pressure switch detects the pressure of the inflation seal ring. When the set pressure is reached, the valve body closing is completed.

[0092] When the pressure of the inflation seal ring does not reach the set pressure, after a delay of a predetermined time, if the set pressure is reached, the valve body closing is completed; after the delay of the predetermined time, if the set pressure is still not reached, the main control unit outputs a signal indicating that the inflation seal ring is damaged and the valve body stops operating.

[0093] The process of opening the valve body includes the following steps:

[0094] Step 201: The main control unit outputs the action instruction for the quick exhaust valve 7 according to the valve opening instruction, and the quick exhaust valve exhausts.

[0095] Step 202: The main control unit acquires the pressure parameter of the inflation seal ring collected by the pressure switch.

[0096] When the pressure parameter is less than the preset pressure, step 203 is executed.

[0097] When the pressure parameter is greater than the preset pressure, it delays for a predetermined time. When the pressure parameter is less than the preset pressure, step 203 is executed.

[0098] When after the delay of the predetermined time, the pressure parameter is still greater than the preset pressure, the main control unit inputs an alarm signal and the valve stops operating.

[0099] Step 203: The main control unit outputs the action instruction for the first solenoid valve. The first solenoid valve controls the cylinder to rotate, and the cylinder drives the valve body to open, and the synchronous shaft rotates synchronously with the valve body.

[0100] Step 204: When the second convex block triggers the corresponding microswitch, the valve body opens.

[0101] When the main control unit does not receive the feedback signal from the microswitch, it delays for a predetermined time. After the delay of the predetermined time, if the main control unit receives the feedback signal from the microswitch, the valve body opens; after the delay of the predetermined time, if it still does not receive the feedback signal from the microswitch, the main control unit outputs an alarm signal and the valve body stops operating.

[0102] A control system and its control method for a dome valve provided by the present invention are used for the electric control part of the dome valve in a material conveying system. When the valve is opened or closed, first, the "open / close feedback" signal and the "sealing ring pressure" signal on the synchronous shaft are collected. Then, after the main control unit analyzes, logically calculates, statistics, and delays these signals, it outputs control instructions to perform actions such as opening and closing the valve, and charging and discharging air for the sealing ring. At the same time, a fault display LED indicator is integrated on the circuit board, which can quickly prompt the fault type, and the actual state of the valve can be monitored in real time through the operation display unit on the side.

[0103] This control system is safe, reliable, simple to operate, and convenient for operation and maintenance. It solves the problems that the damage of the sealing ring of the dome valve cannot be accurately located in time, the pneumatic and electric controls are isolated from each other without integration, and there is no real-time monitoring on site. It can realize the intelligent control of the dome valve and the real-time monitoring of the valve state, which is convenient for on-site debugging and later maintenance, effectively extends the service life of the dome valve, and fully ensures the reliable and stable operation of the material conveying system.

[0104] This control device integrates the pneumatic part and the electric control part in a sealed housing, isolating them from the harsh working conditions outside, which can fully ensure the stable and reliable operation of precision components. Secondly, by using the developed integrated synchronous shaft with a spring snap mechanism, it is not only convenient to adjust the open / close feedback in one operation plane, but also can firmly lock these signals. In addition, the "open / close feedback" signal and the "sealing ring pressure" signal of the valve are introduced into the control loop, and the AI intelligent control of the dome valve is realized through the CPU, memory, integrated circuit, etc. in the control unit. At the same time, through the logical calculation, analysis, and statistics of the feedback state and valve instructions of the valve by the control unit, the fault type of the valve is accurately located. Finally, by receiving the signals sent by the control unit in real time, the actual state of the valve is transmitted to the operation display unit.

[0105] The above content is only to illustrate the technical idea of the present invention and cannot limit the protection scope of the present invention. Any modification made on the basis of the technical solution according to the technical idea proposed by the present invention falls within the protection scope of the claims of the present invention.

Claims

1. A control system for a dome valve, characterized in that, It includes a control device and a synchronizing shaft (5); One end of the synchronizing shaft (5) is connected to the control device, and the other end is connected to one end of the rotating shaft of the cylinder (13). The other end of the cylinder rotating shaft is connected to the valve body, and the synchronizing shaft (5) rotates synchronously with the valve body; The control device includes a main control unit, as well as a pneumatic unit and a signal acquisition unit connected thereto; The signal acquisition unit is used to acquire the opening and closing state of the valve body (14), as well as the pressure parameters of the inflatable seal ring on the valve body; The pneumatic unit is used to control the opening and closing action of the valve body, as well as the inflation and deflation actions of the inflatable seal ring on the valve body according to the output signal of the main control unit; The main control unit is used to output the opening and closing instructions of the valve body and the action instructions of the inflatable seal ring, and output an alarm signal according to the pressure parameters of the inflatable seal ring; The synchronizing shaft includes a rotating shaft, and two cam assemblies sleeved on the rotating shaft, namely a first cam assembly and a second cam assembly; The cam assembly includes a cam ring, a limit plate and an adjustment shaft; The cam ring is of an annular structure, with bumps provided on the outer wall thereof. Internal teeth are circumferentially provided on its inner wall. The limit plate is embedded at the top of the cam ring, and the cam ring can rotate around the limit plate. The limit plate is fixedly sleeved on the rotating shaft. An installation hole is provided on the limit plate, and the adjustment shaft is arranged on the limit plate through the installation hole. One end of it extends into the interior of the cam ring, and one end of it is located outside the limit plate, and the adjustment shaft can move axially along the cam ring; A gear is provided on the adjustment shaft, and the gear is in long-term engagement with the cam ring. Rotating the adjustment shaft is used to adjust the axial position of the cam ring. A positioning mechanism is also provided on the limit plate for circumferentially positioning the adjustment shaft; When adjusting the position of the bump, move the adjustment shaft to separate the gear of the adjustment shaft from the positioning mechanism, rotate the adjustment shaft, and drive the cam ring to rotate through the gear to complete the adjustment of the bump position.

2. The control system of a dome valve according to claim 1, characterized in that, The pneumatic unit includes a solenoid valve (8) and a quick exhaust valve (7) connected to the main control unit. The solenoid valve (8) includes a first solenoid valve and a second solenoid valve; The cylinder (13) is connected to the air source through the first solenoid valve; The quick exhaust valve (7) is connected to the air source through the second solenoid valve, and the quick exhaust valve (7) is installed at the air inlet of the inflatable seal ring.

3. The control system of a dome valve according to claim 1, characterized in that, The acquisition unit includes a pressure switch and two microswitches; The pressure switch is arranged on the air path of the inflatable seal ring and is connected to the main control unit for detecting the pressure parameters of the inflatable seal ring; The first microswitch and the second microswitch are respectively connected to the main control unit. A first bump and a second bump are arranged in the circumferential direction of the synchronizing shaft (5). When the valve body is opened or closed, the first bump and the second bump alternately trigger the first microswitch and the second microswitch.

4. The control system of a dome valve according to claim 3, characterized in that, The main control unit is arranged in the housing (1). One end of the synchronizing shaft extends into the housing, and the first microswitch and the second microswitch are arranged around the synchronizing shaft.

5. The control system of a dome valve according to claim 4, characterized in that, A cylinder (13) is also arranged between the synchronizing shaft and the valve body. One end of the synchronizing shaft (5) is connected to the rotating shaft of the cylinder. The cylinder is connected to the valve body, and the cylinder is connected to the pneumatic unit.

6. A control method for a control system of a dome valve according to any one of claims 1-5, characterized in that, It includes a control method for closing the valve body and a control method for opening the valve body; The control method for closing the valve body includes the following steps: Step 101: The main control unit inputs the action instruction of the first solenoid valve according to the valve closing instruction. Step 102: The first solenoid valve controls the synchronous shaft and the valve body to rotate synchronously to close the valve body. Step 103: When the valve body is closed, the first bump triggers the corresponding microswitch. The main control unit outputs the action instruction of the second solenoid valve according to the feedback signal of the microswitch. Step 104: The second solenoid valve controls the inflation of the inflatable seal ring. Step 105: The pressure switch detects the pressure of the inflatable seal ring. When the set pressure is reached, the valve body closing is completed. The control method for opening the valve body includes the following steps: Step 201: The main control unit outputs the action instruction of the quick exhaust valve (7) according to the valve opening instruction, and the quick exhaust valve exhausts. Step 202: The main control unit obtains the pressure parameter of the inflatable seal ring collected by the pressure switch. If the pressure parameter is less than the preset pressure, execute Step 203. Step 203: The main control unit outputs the action instruction of the first solenoid valve. The first solenoid valve controls the cylinder to rotate, and the cylinder drives the valve body to open, and the synchronous shaft rotates synchronously with the valve body. Step 204: When the second bump triggers the corresponding microswitch, the valve body opens.

7. The control method of a control system for a dome valve according to claim 6, characterized in that, In Step 103, when the main control unit does not receive the feedback signal of the microswitch, after delaying for a predetermined time, if the main control unit receives the feedback signal of the microswitch, it inputs the action instruction of the second solenoid valve. When after delaying for a predetermined time, the main control unit still does not receive the feedback signal of the microswitch, the main control unit outputs an alarm signal and the valve body stops operating.

8. The control method of a control system for a dome valve according to claim 6, characterized in that, In Step 105, when the pressure of the inflatable seal ring does not reach the set pressure, after delaying for a predetermined time, when the set pressure is reached, the valve body closing is completed. When after delaying for a predetermined time, the set pressure is still not reached, the main control unit outputs a signal indicating that the inflatable seal ring is damaged and the valve body stops operating.

9. The control method of a control system for a dome valve according to claim 6, characterized in that, In Step 202, when the pressure parameter is greater than the preset pressure, delay for a predetermined time. When the pressure parameter is less than the preset pressure, execute Step 203. When after delaying for a predetermined time, the pressure parameter is still greater than the preset pressure, the main control unit inputs an alarm signal and the valve stops operating.

10. The control method of a control system for a dome valve according to claim 6, characterized in that, In Step 204, when the main control unit does not receive the feedback signal of the microswitch, after delaying for a predetermined time, if the main control unit receives the feedback signal of the microswitch, the valve body opens. When after delaying for a predetermined time, the feedback signal of the microswitch is still not received, the main control unit outputs an alarm signal and the valve body stops operating.

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