Nitrogen pressure adjusting device based on mainboard control electromagnetic valve

Abstract

The invention discloses a nitrogen pressure adjusting device based on a mainboard control electromagnetic valve, and relates to the field of pipeline pressure adjustment. A nitrogen pressure adjusting device based on a mainboard control electromagnetic valve comprises the electromagnetic valve, a mainboard box for controlling the mainboard is installed on the electromagnetic valve, the air inlet end and the air outlet end of the electromagnetic valve are connected with an air inlet pipe and an air outlet pipe respectively, and the nitrogen pressure adjusting device further comprises pressure sensors fixedly connected to the air inlet pipe and the air outlet pipe respectively. The pressure sensor is used for detecting nitrogen pressure in the gas inlet pipe and the gas outlet pipe; the air inlet end of the pressure relief tank is communicated with the air inlet pipe; through the arrangement of the pressure relief tank, when a nitrogen conveying pipeline is shut down through the electromagnetic valve, redundant air pressure at the air inlet end can be adjusted, sudden pressure increase caused by the water hammer effect is reduced, the influence of the sudden pressure increase on a sealing piece is reduced, the service life of the sealing piece is effectively prolonged, and the safety of the sealing piece is improved. And long-time use is facilitated.

Description

Technical Field

[0001] The present invention belongs to the technical field of pipeline pressure regulation, and in particular relates to a nitrogen pressure regulating device based on a mainboard-controlled solenoid valve. Background Art

[0002] In modern industrial production and scientific research experiments, nitrogen is widely used in many fields such as chemical industry, food packaging, electronic manufacturing, and pharmaceutical production due to its stable chemical properties and low cost.

[0003] Currently, most common nitrogen pressure regulating devices on the market use solenoid valves in conjunction with control systems to achieve pressure regulation. Such devices usually monitor pressure signals through pressure sensors, and then use controllers to control the opening and closing of solenoid valves to adjust the nitrogen flow rate, thereby achieving pressure stability. However, when the solenoid valve is closed, a water hammer effect will occur in the pipeline, causing the pressure to rise sharply instantly. This may cause impact damage to pipelines, valves and other components, shorten the service life of the equipment, and even cause serious safety problems such as pipeline rupture and leakage. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a pipeline pressure regulator that can overcome the above problems or at least partially solve the above problems.

[0005] To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a nitrogen pressure regulating device based on a mainboard-controlled solenoid valve, comprising a solenoid valve, a mainboard box for controlling the mainboard mounted on the solenoid valve, an inlet end and an outlet end of the solenoid valve being connected to an inlet pipe and an outlet pipe, respectively, and further comprising: Pressure sensors are fixedly connected to the air inlet pipe and the air outlet pipe respectively, and are used to detect the nitrogen pressure in the air inlet pipe and the air outlet pipe; A pressure relief tank, wherein the air inlet end of the pressure relief tank is connected to the air inlet pipe, the air outlet end of the pressure relief tank is connected to the mainboard box, and the air inlet end of the pressure relief tank is connected to a control valve; A warning component is provided on the pressure relief tank; A filter assembly is arranged in the pressure relief tank; When the solenoid valve is closed, the pressure in the intake pipe will increase rapidly due to the water hammer effect. The nitrogen pressure in the intake and outlet pipes will be monitored by the pressure sensor. If the pressure in the intake pipe exceeds the threshold, the control valve in the intake end of the pressure relief tank will open, and part of the nitrogen in the intake pipe will enter the pressure relief tank to reduce the pressure value of the intake pipe. After the pressure reaches the threshold, the control valve will close, and the nitrogen entering the pressure relief tank will filter the water vapor through the filter assembly. Then the warning device will issue an alarm. At the same time, the filtered nitrogen will enter the mainboard box to cool the mainboard.

[0006] Furthermore, the filter assembly includes two groups of filter screens and activated alumina. The two groups of filter screens are fixedly connected in the pressure relief tank, and the activated alumina is arranged between the filter screens.

[0007] Furthermore, a fan blade is rotatably connected inside the pressure relief tank, a rotating shaft is fixedly connected to the rotating end of the fan blade, one end of the rotating shaft passes through the filter, the passing end of the rotating shaft is located between two groups of filter screens, and an arc-shaped raised plate is fixedly connected to the rotating shaft, which is used to stir the activated alumina.

[0008] Furthermore, an arc-shaped inward-concave ring is fixedly connected between the two groups of filter screens, and the arc-shaped inward-concave ring is used to further disrupt the flow of the activated alumina.

[0009] Furthermore, the pressure relief tank is provided with a discharge pipe having a control valve, and the discharge pipe is used to discharge the activated alumina.

[0010] Furthermore, the warning component includes a knocking rod, a moving rod, and a limiting rod. The limiting rod is arranged in a ring shape, and multiple groups of the moving rods are slidably connected in a ring shape in the limiting rod. Through the rotation of the knocking rod at the axis of the limiting rod, it will continuously contact the moving rod in the limiting rod, thereby generating a knocking sound to warn the surroundings.

[0011] Furthermore, a bevel gear 1 is fixedly connected to the rotating shaft, a bevel gear 2 is meshedly connected to the bevel gear 1, a transmission rod is fixedly connected to the bevel gear 2, one end of the transmission rod passes through the pressure relief tank, and the knocking rod is fixedly connected to the through end of the transmission rod.

[0012] Furthermore, a fixing ring is fixedly connected to the pressure relief tank, a plurality of spring members are fixedly connected to the inner ring of the fixing ring, and one end of the spring member is fixedly connected to one end of the moving rod.

[0013] Furthermore, the limiting rod is fixedly connected to the pressure relief tank.

[0014] Furthermore, a cover plate is detachably mounted on the mainboard box, and a pressure relief valve is provided on the cover plate.

[0015] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: through the provision of a pressure relief tank, the present invention can adjust the excess air pressure at the air inlet end when the nitrogen transport pipeline is shut down by the solenoid valve, thereby reducing the sudden increase in pressure due to the water hammer effect, reducing the impact of the sudden increase in pressure on the seal, effectively increasing the service life of the seal, and facilitating long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In the attached figure: Figure 1 This is a schematic diagram of the structure of a nitrogen pressure regulating device based on a motherboard controlled solenoid valve proposed by the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of a nitrogen pressure regulating device based on a motherboard controlled solenoid valve proposed by the present invention. Figure 2 ; Figure 3 The present invention proposes a nitrogen pressure regulating device based on a mainboard controlled solenoid valve Figure 3 Schematic diagram of the structure of part A; Figure 4 This is a schematic diagram of the structure of a nitrogen pressure regulating device based on a motherboard controlled solenoid valve proposed by the present invention. Figure 3 ; Figure 5 The present invention proposes a nitrogen pressure regulating device based on a mainboard controlled solenoid valve Figure 4 Schematic diagram of the structure of part B; Figure 6 The present invention proposes a nitrogen pressure regulating device based on a mainboard controlled solenoid valve Figure 5 Schematic diagram of the structure of part C; Figure 7 This is a schematic diagram of the structure of a nitrogen pressure regulating device based on a motherboard controlled solenoid valve proposed by the present invention. Figure 4 ; Figure 8 The present invention proposes a nitrogen pressure regulating device based on a mainboard controlled solenoid valve Figure 6 Schematic diagram of the structure of part D.

[0017] In the figure: 1. Solenoid valve; 101. Air inlet pipe; 102. Air outlet pipe; 103. Main board box; 104. Cover plate; 105. Pressure relief valve; 2. Pressure sensor; 3. Pressure relief tank; 301. Fan blade; 302. Rotating shaft; 303. Discharge pipe; 4. Filter; 501. Arc-shaped concave ring; 502. Arc-shaped raised plate; 601. Bevel gear 1; 602. Bevel gear 2; 603. Transmission rod; 604. Knocking rod; 701. Fixed ring; 702. Spring member; 703. Moving rod; 704. Limiting rod. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0019] Example: Refer to Figure 1-8, a nitrogen pressure regulating device based on a mainboard controlled solenoid valve, comprising a solenoid valve 1, a mainboard box 103 of a control mainboard being installed on the solenoid valve 1, the air inlet end and the air outlet end of the solenoid valve 1 being connected to an air inlet pipe 101 and an air outlet pipe 102 respectively, characterized in that it also comprises: a pressure sensor 2, fixedly connected to the air inlet pipe 101 and the air outlet pipe 102 respectively, the pressure sensor 2 being used to detect the nitrogen pressure in the air inlet pipe 101 and the air outlet pipe 102; a pressure relief tank 3, the air inlet end of the pressure relief tank 3 being connected to the air inlet pipe 101, the air outlet end of the pressure relief tank 3 being connected to the mainboard box 103, the air inlet end of the pressure relief tank 3 being connected to a control valve; an alarm component being arranged on the pressure relief tank 3; a filter group 101 , and the pressure sensor 2 is used to check the nitrogen pressure in the air inlet pipe 101 and the air outlet pipe 102. If the pressure in the air inlet pipe 101 exceeds the threshold, the control valve in the air inlet end of the pressure relief tank 3 opens, and part of the nitrogen in the air inlet pipe 101 enters the pressure relief tank 3, reducing the pressure value of the air inlet pipe 101. After the pressure value reaches the threshold, the control valve closes, and the nitrogen entering the pressure relief tank 3 will pass through the filter component to filter the water vapor. Then the warning device issues an alarm. At the same time, the filtered nitrogen will enter the mainboard box 103 to cool the mainboard.

[0020] During the system startup phase, after the power is turned on, the PLC control unit in the mainboard box 103 performs a self-check. After completion, it loads the preset pressure threshold and other parameters. At the same time, the pressure sensor 2 on the inlet pipe 101 and the outlet pipe 102 is calibrated, and the system enters the normal gas supply phase. The operator sets the target pressure through the HMI interface. The mainboard uses the PID algorithm to control the opening of the solenoid valve 1 based on the feedback data from the pressure sensor 2, so that nitrogen flows from the inlet pipe 101 through the solenoid valve 1 to the outlet pipe 102.

[0021] When the solenoid valve 1 is closed and a water hammer effect occurs, the pressure in the air intake pipe 101 suddenly changes. The pressure sensor 2 detects that the pressure exceeds 0.8 MPa or the pressure change rate exceeds 0.5 MPa / s. The main board opens the control valve at the air intake end of the pressure relief tank 3 within 0.2 seconds, and high-pressure nitrogen flows into the pressure relief tank 3 to relieve the pressure. When the pressure drops below 0.6 MPa, the control valve is closed. The nitrogen entering the pressure relief tank 3 is removed from the water by the filter component, and then enters the main board box 103 to cool the internal main board, and is finally discharged from the exhaust port.

[0022] The filter assembly includes two groups of filter screens 4 and activated alumina. The two groups of filter screens 4 are fixedly connected in the pressure relief tank 3 , and the activated alumina is arranged between the filter screens 4 .

[0023] During the normal gas supply stage, part of the nitrogen continues to flow in from the normally open small hole at the air inlet end of the pressure relief tank 3. In the nitrogen purification stage, after entering the pressure relief tank 3, the nitrogen is first dispersed by the first set of filters 4 and fully contacts with the activated alumina between the two sets of filters 4. The activated alumina absorbs water vapor, the filter 4 intercepts particulate impurities larger than 10μm, and the micropores of the activated alumina absorb smaller particles.

[0024] A fan blade 301 is rotatably connected inside the pressure relief tank 3, and a rotating shaft 302 is fixedly connected to the rotating end of the fan blade 301. One end of the rotating shaft 302 passes through the filter 4, and the passing end of the rotating shaft 302 is located between the two groups of filter screens 4. An arc-shaped raised plate 502 is fixedly connected to the rotating shaft 302, which is used to stir the activated alumina.

[0025] The rotation speed of the fan blade 301 will increase as the intake pressure increases, further enhancing the stirring effect on the activated alumina, allowing the nitrogen to come into more complete contact with the activated alumina, improving the purification efficiency, and ensuring the quality of the nitrogen entering the mainboard box 103.

[0026] An arc-shaped inward-concave ring 501 is fixedly connected between the two groups of filter screens 4, and the arc-shaped inward-concave ring 501 is used to further disrupt the flow of the activated alumina.

[0027] The pressure relief tank 3 is provided with a discharge pipe 303 having a control valve, and the discharge pipe 303 is used to discharge the activated alumina.

[0028] When the system has been running for 8,000 hours or a decrease in filtering effect is detected, the activated alumina replacement process enters the maintenance stage. First, close the air inlet valve to cut off the air source, open the control valve of the discharge pipe 303 to empty the residual pressure in the pressure relief tank 3, start the bottom vibrator, and the activated alumina is discharged through the discharge pipe 303 under the action of gravity and vibration. 2.5 kg of activated alumina is discharged in about 3 minutes.

[0029] After discharge, new activated alumina is injected through the feed port, which is located at the top and not shown in the figure. The control valve of the discharge pipe 303 is closed to resume gas supply.

[0030] The warning component includes a knocking rod 604, a moving rod 703, and a limiting rod 704. The limiting rod 704 is arranged in a ring shape, and multiple groups of moving rods 703 are slidably connected in a ring shape in the limiting rod 704. The knocking rod 604 rotates at the axis of the limiting rod 704, and will continuously contact the moving rod 703 in the limiting rod 704, thereby generating a knocking sound to warn the surroundings. A bevel gear 601 is fixedly connected to the rotating shaft 302. It is meshed with bevel gear 2 602, and a transmission rod 603 is fixedly connected to the bevel gear 2 602. One end of the transmission rod 603 passes through the pressure relief tank 3, and the knocking rod 604 is fixedly connected to the through end of the transmission rod 603. A fixing ring 701 is fixedly connected to the pressure relief tank 3, and multiple groups of spring members 702 are fixedly connected to the inner ring of the fixing ring 701. One end of the spring member 702 is fixedly connected to one end of the moving rod 703, and the limiting rod 704 is fixedly connected to the pressure relief tank 3.

[0031] When the warning component needs to be activated, the transmission system stably transmits the rotational power of the rotating shaft 302 to the knocking rod 604, ensuring that the knocking rod 604 rotates at a stable speed and continuously strikes the moving rod 703 to generate a warning sound.

[0032] A cover plate 104 is detachably mounted on the mainboard box 103 , and a pressure relief valve 105 is provided on the cover plate 104 .

[0033] When the system is operating normally, the cover 104 on the mainboard box 103 is connected to the box body by M6 bolts. The sealing strip is made of EPDM rubber to ensure that the protection level of the mainboard box 103 reaches IP65, preventing dust and water vapor from invading and protecting internal electrical components.

[0034] When the air pressure in the mainboard box 103 increases, the pressure relief valve 105 on the cover 104 automatically opens to release the internal pressure at a displacement of 50L / min to prevent the box from bursting. The cover 104 is removed during maintenance and reinstalled after maintenance to ensure sealing, thereby ensuring the safe and stable operation of the mainboard box 103.

[0035] Overall workflow: 1. System initialization phase Power-on self-test: After the power is turned on, the PLC control unit in the mainboard box 103 performs a self-test to check whether the program storage, I / O interface, communication module, etc. are normal. The self-test time is about 5 seconds, during which the LED indicator light flashes orange.

[0036] Parameter loading: Read preset parameters from EEPROM, including pressure thresholds.

[0037] Sensor calibration: The mainboard sends calibration instructions to the pressure sensors 2 on the inlet pipe 101 and the outlet pipe 102 to perform zero point calibration and span calibration. The calibration error is controlled within ±0.01MPa.

[0038] Valve status confirmation: Check the initial position of the solenoid valve 1 and the control valve at the air inlet end of the pressure relief tank 3 to ensure that they are in the closed state.

[0039] 2. Standby phase Pressure monitoring: Pressure sensor 2 collects pipeline pressure data at a frequency of 10Hz. The mainboard calculates the pressure change rate dp / dt to determine whether there is a leak in the system. When the pressure change rate exceeds 0.05MPa / min and there is no gas demand, a leak alarm is triggered.

[0040] Data recording: The mainboard stores key data such as pressure and temperature in an SD card at a 1-minute cycle to facilitate subsequent fault analysis and performance evaluation.

[0041] 3. Normal gas supply stage Start gas supply: The operator enters the target pressure value through the HMI interface (not shown in the figure). The main board calculates the required opening of solenoid valve 1 and sends a PWM control signal. Solenoid valve 1 completes the opening adjustment within 0.5 seconds, allowing nitrogen to flow from the inlet pipe 101 to the outlet pipe 102.

[0042] 4. Water hammer effect treatment stage Pressure mutation detection: When the solenoid valve 1 is closed, the pressure in the intake pipe 101 rises rapidly within 0.1 seconds. When the pressure sensor 2 detects that the pressure change rate exceeds 0.5MPa / s or the pressure exceeds 0.8MPa, it immediately sends an abnormal signal to the main board.

[0043] Emergency pressure relief response: Within 0.2 seconds after receiving the abnormal signal, the mainboard issues a command to open the control valve at the air inlet end of the pressure relief tank 3. High-pressure nitrogen quickly enters the pressure relief tank 3, causing the pressure of the air inlet pipe 101 to drop rapidly to below 0.6 MPa. Nitrogen continuously flows into the pressure relief tank 3 through the normally open small hole at the air inlet end of the pressure relief tank 3, with a flow rate of about 0.5 L / min. The gas impacts the fan blade 301, causing it to rotate at a speed of about 200 rpm, driving the arc-shaped raised plate 502 to stir the activated alumina, removing water vapor and impurities in the nitrogen. The purified nitrogen enters the mainboard box 103 through the pipeline, takes away the heat generated by the electronic components, and is finally discharged from the exhaust port of the mainboard box 103.

[0044] Automatic recovery: When the pressure sensor 2 detects that the pressure of the intake pipe 101 drops below the safe range of 0.6MPa, the main board closes the control valve at the intake end of the pressure relief tank 3 within 0.5 seconds, and the system returns to standby mode.

[0045] Data recording: The mainboard records the time, pressure peak, duration and other information of the pressure relief event, and adds 1 to the number of pressure relief events. When the number of consecutive pressure relief events reaches 3, the warning component is triggered.

[0046] 5. Alert triggering stage Knocking warning: Every time the knocking rod 604 rotates one circle, it collides with each of the eight moving rods 703 once, generating a warning sound.

[0047] Remote alarm: If the system is connected to a remote monitoring module, the motherboard will send an alarm text message to the operation and maintenance personnel's mobile phone via the 4G network, including information such as alarm type, time, and device number.

[0048] 6. Maintenance phase Replacement of activated alumina: When the system operation time reaches 8000 hours or it detects that the filtration effect has decreased and the outlet dew point has increased, the system prompts to replace the activated alumina. The operator performs maintenance according to the following steps: Close the air inlet valve and cut off the air source; Open the control valve of the discharge pipe 303 to discharge the residual pressure in the pressure relief tank 3; Start the bottom vibrator with an amplitude of 2 mm and a frequency of 50 Hz to discharge the activated alumina through the discharge pipe 303. It takes about 3 minutes to empty. 2.5 kg of new activated alumina was injected through the feed port (not shown); Close the control valve of the discharge pipe 303 to restore the gas supply; Reset the activated alumina service life counter on the HMI interface.

[0049] Mainboard box 103 maintenance: When the mainboard needs to be repaired: Turn off the power and disconnect the system; Remove the eight M6 bolts on the cover plate 104; Remove cover 104 to access the internal mainboard; After the inspection is completed, reinstall the cover plate 104, ensuring that the sealing strip is correctly in place; Turn on the power and perform a power-on self-test.

[0050] 7. Downtime Normal shutdown: The operator selects the "Stop" option through the HMI interface, and the system executes the following steps: Gradually reduce the opening of solenoid valve 1 to 0% and close the air supply.

[0051] By setting up the pressure relief tank 3, the present invention can adjust the excess air pressure at the air inlet end when the nitrogen transportation pipeline is shut down by the solenoid valve 1, reduce the sudden increase in pressure due to the water hammer effect, reduce the impact of the sudden pressure increase on the seal, effectively increase the service life of the seal, and facilitate long-term use.

[0052] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with the present invention can make slight changes or modifications to equivalent embodiments using the above-mentioned technical contents without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications 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 are still within the scope of the solution of the present invention.

Claims

1. A nitrogen pressure regulating device based on a mainboard-controlled solenoid valve, comprising a solenoid valve (1), wherein a mainboard box (103) for controlling a mainboard is mounted on the solenoid valve (1), and an air inlet end and an air outlet end of the solenoid valve (1) are connected to an air inlet pipe (101) and an air outlet pipe (102) respectively, characterized in that: Also includes: A pressure sensor (2) is fixedly connected to the air inlet pipe (101) and the air outlet pipe (102), respectively, and the pressure sensor (2) is used to detect the nitrogen pressure in the air inlet pipe (101) and the air outlet pipe (102); A pressure relief tank (3), wherein the air inlet end of the pressure relief tank (3) is in communication with the air inlet pipe (101), the air outlet end of the pressure relief tank (3) is in communication with the mainboard box (103), and a control valve is connected to the air inlet end of the pressure relief tank (3); A warning component, arranged on the pressure relief tank (3); A filter assembly is arranged in the pressure relief tank (3); When the solenoid valve (1) is closed, the pressure in the air inlet pipe (101) increases rapidly due to the water hammer effect. The nitrogen pressure in the air inlet pipe (101) and the air outlet pipe (102) is measured by the pressure sensor (2). If the pressure in the air inlet pipe (101) exceeds the threshold, the control valve in the air inlet end of the pressure relief tank (3) opens, and part of the nitrogen in the air inlet pipe (101) enters the pressure relief tank (3), reducing the pressure value of the air inlet pipe (101). After the pressure value reaches the threshold, the control valve closes, and the nitrogen entering the pressure relief tank (3) will filter the water vapor through the filter component, and then the warning device will sound an alarm. At the same time, the filtered nitrogen will enter the mainboard box (103) to cool the mainboard.

2. A nitrogen pressure regulating device based on a mainboard controlled solenoid valve according to claim 1, characterized in that: The filter assembly comprises two groups of filter screens (4) and activated alumina. The two groups of filter screens (4) are fixedly connected in the pressure relief tank (3), and the activated alumina is arranged between the filter screens (4).

3. A nitrogen pressure regulating device based on a mainboard controlled solenoid valve according to claim 2, characterized in that: A fan blade (301) is rotatably connected in the pressure relief tank (3), a rotating shaft (302) is fixedly connected to the rotating end of the fan blade (301), one end of the rotating shaft (302) passes through the filter screen (4), and the through end of the rotating shaft (302) is located between two groups of filter screens (4), and an arc-shaped raised plate (502) is fixedly connected to the rotating shaft (302), and the activated alumina is stirred through the arc-shaped raised plate (502).

4. The nitrogen pressure regulating device based on a mainboard controlled solenoid valve according to claim 3, characterized in that: An arc-shaped inward-concave ring (501) is fixedly connected between the two groups of filter screens (4), and the arc-shaped inward-concave ring (501) is used to further disrupt the flow of the activated alumina.

5. The nitrogen pressure regulating device based on a mainboard controlled solenoid valve according to claim 4, characterized in that: The pressure relief tank (3) is provided with a discharge pipe (303) having a control valve, and the discharge pipe (303) is used to discharge the activated alumina.

6. The nitrogen pressure regulating device based on a mainboard controlled solenoid valve according to claim 1, characterized in that: The warning component comprises a knocking rod (604), a moving rod (703), and a limiting rod (704); the limiting rod (704) is arranged in a ring shape, and multiple groups of the moving rods (703) are slidably connected in the limiting rod (704) in a ring shape; the knocking rod (604) rotates at the axis of the limiting rod (704) and continuously contacts the moving rod (703) in the limiting rod (704), thereby generating a knocking sound and warning the surroundings.

7. The nitrogen pressure regulating device based on a mainboard controlled solenoid valve according to claim 6, characterized in that: The rotating shaft (302) is fixedly connected to a bevel gear 1 (601), the bevel gear 1 (601) is meshedly connected to a bevel gear 2 (602), the bevel gear 2 (602) is fixedly connected to a transmission rod (603), one end of the transmission rod (603) passes through the pressure relief tank (3), and the knocking rod (604) is fixedly connected to the through end of the transmission rod (603).

8. The nitrogen pressure regulating device based on a mainboard controlled solenoid valve according to claim 7, characterized in that: A fixing ring (701) is fixedly connected to the pressure relief tank (3), and a plurality of groups of spring members (702) are fixedly connected to the inner ring of the fixing ring (701), and one end of the spring member (702) is fixedly connected to one end of the moving rod (703).

9. The nitrogen pressure regulating device based on a mainboard controlled solenoid valve according to claim 6, characterized in that: The limiting rod (704) is fixedly connected to the pressure relief tank (3).

10. The nitrogen pressure regulating device based on a mainboard controlled solenoid valve according to claim 1, characterized in that: A cover plate (104) is detachably mounted on the mainboard box (103), and a pressure relief valve (105) is provided on the cover plate (104).

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