Mechanical seal plan 53b system automatic liquid supply device

Abstract

The utility model relates to a kind of mechanical seal plan53B system automatic liquid supply device, including pneumatic system, hydraulic system and electric control system, the hydraulic system includes pneumatic pump and medium storage tank, the pneumatic system is the power source for the pneumatic pump, the pneumatic pump exports the medium in the medium storage tank to mechanical seal plan53B system, the electric control system is used to control the start-stop of the pneumatic system and the automatic liquid supplement of the medium storage tank.The utility model has the beneficial effect that it can supply liquid to system in time, with high degree of automation, and can ensure the stability of liquid supply.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seal technology, specifically designing an automatic liquid supply device for a mechanical seal plan53B system. Background Technology

[0002] In the field of industrial mechanical seals, the Plan 53B system is a commonly used seal flushing solution, primarily for sealing and protecting against high-temperature, high-pressure, or easily crystallizing media. This system prevents process media leakage and reduces wear on the sealing friction pairs by providing a clean, insulating fluid (such as lubricating oil or ethylene glycol solution) to the sealing cavity. Currently, traditional Plan 53B systems mainly use a hand-cranked pressure device as the power source for fluid supply, with a manually operated pump delivering the insulating fluid to the sealing cavity.

[0003] However, this manual liquid supply method has the following significant drawbacks: manual pressurization relies entirely on manual operation, the liquid supply speed is slow, and it is difficult to meet the rapid liquid replenishment needs of continuous production. In operating conditions that require frequent liquid replenishment (such as high-pressure systems or volatile media), operators need to manually crank the pump for a long time, which is labor-intensive and can easily lead to fatigue or even operational errors. Manual liquid supply cannot monitor system pressure changes in real time and can only rely on manual observation of the pressure gauge to determine the timing of liquid replenishment. It is easy to cause insufficient pressure in the sealing cavity due to untimely liquid replenishment, which may lead to seal failure or media leakage. In case of sudden operating conditions (such as sudden seal leakage), manual operation is difficult to respond in time, which may increase the risk of equipment damage. Utility Model Content

[0004] The purpose of this invention is to provide an automatic liquid supply device for a mechanical seal plan53B system that can supply liquid to the system in a timely manner, has a high degree of automation, and can ensure the stability of the liquid supply.

[0005] An automatic fluid supply device for a mechanical seal plan53B system includes a pneumatic system, a hydraulic system, and an electrical control system. The hydraulic system includes a pneumatic pump and a medium storage tank. The pneumatic system provides a power source for the pneumatic pump, which outputs the medium from the medium storage tank to the mechanical seal plan53B system. The electrical control system is used to control the start and stop of the pneumatic system and the automatic replenishment of the medium storage tank.

[0006] In the above scheme, the electrical control system can start or stop the pneumatic system according to the pressure in the mechanical seal plan53B system. The pneumatic system provides a power source for the pneumatic pump of the hydraulic system. After the pneumatic system is started, the pneumatic pump extracts the medium from the medium storage tank and delivers it to the mechanical seal plan53B system. After the pneumatic system is stopped, the pneumatic pump stops delivering the medium to the mechanical seal plan53B system, which greatly improves the automation of the liquid supply process, reduces manual intervention, and reduces labor intensity. At the same time, it can automatically replenish the medium in the medium storage tank, ensuring that there is always a sufficient supply of medium in the medium storage tank, avoiding problems such as mechanical seal failure due to insufficient medium, and ensuring the stable operation of the mechanical seal plan53B system. Stable liquid supply can ensure that the mechanical seal plan53B system receives good lubrication and cooling, reduce the wear and friction of mechanical seal components, thereby extending the service life of the mechanical seal and related equipment, and reducing the maintenance cost and replacement frequency of the equipment.

[0007] Furthermore, the pneumatic system includes an air compressor, an air filter, an air solenoid valve, and an air regulating valve connected in sequence, with the air regulating valve connected to the pneumatic pump.

[0008] In the above scheme, compressed air from the air compressor enters the air filter, and the filtered air enters the air regulating valve through the air solenoid valve. The air regulating valve regulates the air pressure before it enters the pneumatic pump. The use of the air solenoid valve allows the start and stop of the pneumatic pump to be flexibly controlled by the electronic control system. The air regulating valve can precisely regulate the pressure of the compressed air entering the pneumatic pump, so that the pneumatic pump always operates under suitable air pressure conditions. This helps to ensure the stability of the output flow and pressure of the pneumatic pump, thereby ensuring that the mechanical seal plan53B system can obtain a stable and reliable medium supply, improving the performance and service life of the mechanical seal.

[0009] Furthermore, the pneumatic system also includes an air safety valve connected between the air filter and the air regulating valve.

[0010] In the above solution, during the operation of the air compressor, the output compressed air pressure may rise abnormally due to its own failure, control system malfunction, or other unexpected situations. The air safety valve can prevent excessive pressure from damaging the air solenoid valve and air regulating valve. Even if the air compressor itself is working normally, there may be brief pressure fluctuations during system operation. These fluctuations may affect the adjustment accuracy of the air regulating valve, causing it to be unable to accurately control the air pressure, which in turn affects the working stability of the pneumatic pump. The air safety valve can act in time when the pressure fluctuation exceeds the normal range to stabilize the system pressure and ensure that the air regulating valve and pneumatic pump can work in a relatively stable pressure environment, thereby improving the reliability and stability of the system.

[0011] Furthermore, the electrical control system includes a PLC controller, a pressure switch, and a pressure transmitter. The pressure switch and pressure transmitter are installed in the mechanical seal plan53B system, and the PLC controller is electrically connected to the pressure switch, pressure transmitter, and air solenoid valve.

[0012] In the above scheme, when the pressure switch detects that the system pressure is lower than the set low-pressure alarm value, or the pressure value reported by the pressure transmitter is lower than the preset low-pressure range, the PLC controller will issue a command to energize the air solenoid valve. When the pressure switch detects that the system pressure is higher than the set high-pressure alarm value, or the pressure value reported by the pressure transmitter is higher than the preset high-pressure range, the PLC controller will issue a command to de-energize the air solenoid valve. After de-energization, the air solenoid valve closes, cutting off the supply of compressed air, stopping the pneumatic pump, and preventing the system pressure from continuing to rise. The entire pressure monitoring, signal processing, and control execution process is automatically completed by the electrical control system, eliminating the need for real-time manual monitoring and operation. This not only reduces the intensity of manual labor but also reduces the impact of human factors on system control, improving the automation level and operating efficiency of the mechanical seal plan53B system.

[0013] Furthermore, the inlet of the medium storage tank is connected to an automatic control valve, and an electromagnetic level gauge is installed on the medium storage tank. The electromagnetic level gauge and the automatic control valve are electrically connected to the PLC controller.

[0014] In the above scheme, an electromagnetic level gauge is installed on the medium storage tank, which can accurately measure the liquid level height of the medium in the tank in real time. The electromagnetic level gauge operates on the principle of electromagnetic induction, converting the liquid level information into an electrical signal. This electrical signal is continuously transmitted to the PLC controller. After receiving the liquid level signal from the electromagnetic level gauge, the PLC controller compares it with preset upper and lower liquid level thresholds. When the liquid level is below the lower threshold, the PLC controller sends a control signal to the automatic control valve. Upon receiving the signal, the automatic control valve opens, allowing the medium to flow into the medium storage tank from an external source, initiating the liquid replenishment operation. When the liquid level is above the upper threshold, the PLC controller analyzes the signal and sends a shut-off signal to the automatic control valve, which closes, stopping the liquid replenishment into the medium storage tank. This achieves automated control of the medium storage tank replenishment process, eliminating the need for constant manual monitoring of the liquid level and manual operation of the control valve. This significantly improves production efficiency, reduces labor costs and the possibility of human error, making the entire replenishment process more efficient, accurate, and stable.

[0015] Furthermore, the hydraulic system also includes a liquid safety valve, the pneumatic pump is connected to the liquid safety valve, the liquid safety valve is connected to a first pipeline and a second pipeline, the first pipeline is connected to the mechanical seal plan53B system, and the second pipeline is connected to the medium storage tank.

[0016] In the above scheme, when the pneumatic pump delivers the medium from the medium storage tank to the mechanical seal plan53B system, the pressure in the hydraulic system gradually increases with the flow of the medium. When the system pressure is lower than the opening pressure threshold set by the liquid safety valve, the liquid safety valve is closed. At this time, the medium flows normally to the mechanical seal plan53B system through the first pipeline to meet the working requirements of the system. When the pressure in the hydraulic system continues to rise and exceeds the opening pressure threshold set by the liquid safety valve, the liquid safety valve will automatically open. After opening, a portion of the medium will flow back to the medium storage tank through the second pipeline, thereby releasing the excess pressure in the system and rapidly reducing the pressure of the hydraulic system until the pressure drops below the closing pressure threshold of the liquid safety valve. Then, the liquid safety valve closes again, restoring normal working conditions.

[0017] Furthermore, the medium storage tank is connected to a medium safety valve, and the second pipeline is connected to the medium safety valve.

[0018] In the above scheme, when the hydraulic system is working normally, the pneumatic pump delivers the medium from the medium storage tank to the mechanical seal plan53B system. When the system pressure is within the normal range and has not reached the opening pressure threshold of the medium safety valve, the medium safety valve is closed. When an abnormal situation occurs in the system, causing the pressure to rise sharply and exceed the set pressure threshold of the medium safety valve, the medium safety valve opens, and the second pipeline begins to function. It provides a safe venting channel for the overpressured medium, allowing the medium to flow back from the system to the medium storage tank. In this way, the pressure in the system is quickly reduced, protecting the safety of the entire system.

[0019] Furthermore, the inlet of the mechanical seal plan53B system is connected to a check valve, and the first pipeline is connected to the check valve.

[0020] In the above scheme, the check valve prevents potentially contaminated media within the mechanical seal plan 53B system from flowing back into the first pipeline and the upstream hydraulic system. During the mechanical sealing process, the media may mix with the sealed media, impurities, etc. If backflow occurs, these contaminated media will enter the originally pure hydraulic system, affecting the purity of the media throughout the hydraulic system. The presence of the check valve ensures unidirectional flow of the media, helping to maintain media purity and improve system operating efficiency and reliability.

[0021] Furthermore, the pneumatic pump is connected to an air inlet pipe and a medium inlet pipe, and the air inlet pipe and the medium inlet pipe are respectively equipped with a first shut-off valve and a second shut-off valve.

[0022] In the above scheme, by adjusting the opening of the first and second shut-off valves, the flow rate of gas and medium entering the pneumatic pump can be precisely controlled. According to different working conditions, the input of gas and medium can be flexibly adjusted, thereby changing the output flow rate and pressure of the pneumatic pump. For example, when a lower flow rate and pressure are required, the opening of the shut-off valve can be appropriately reduced; while when a larger power output is required, the opening can be increased, so that the pneumatic pump can better adapt to various working conditions and improve the operating efficiency of the system.

[0023] Furthermore, the air filter is connected to an inlet compressed gas pipeline and an outlet compressed gas pipeline, and a third shut-off valve and a fourth shut-off valve are respectively provided on the inlet compressed gas pipeline and the outlet compressed gas pipeline.

[0024] In the above scheme, by adjusting the opening degrees of the third and fourth shut-off valves, the flow rate and pressure of compressed gas entering and exiting the air filter can be precisely controlled. Under different operating conditions, the opening degree of the shut-off valves can be flexibly adjusted according to actual needs, enabling the air filter to operate under optimal working conditions and improving filtration efficiency. For example, in applications with high requirements for compressed air quality, the gas flow rate can be appropriately reduced to prolong the residence time of the gas in the filter, thereby improving the filtration effect.

[0025] This utility model discloses an automatic liquid supply device for a mechanical seal plan53B system, which offers the advantages of timely liquid supply, high automation, and stable liquid supply. The electrical control system can start or stop the pneumatic system based on the pressure within the mechanical seal plan53B system. The pneumatic system provides power to the pneumatic pump in the hydraulic system. When the pneumatic system is started, the pneumatic pump extracts the medium from the medium storage tank and delivers it to the mechanical seal plan53B system. When the pneumatic system is stopped, the pneumatic pump ceases supplying the medium to the mechanical seal plan53B system. This significantly improves the automation of the liquid supply process, reduces manual intervention, and lowers labor intensity. Simultaneously, it automatically replenishes the medium in the storage tank, ensuring a constant supply of medium and preventing mechanical seal failure due to insufficient medium, thus guaranteeing the stable operation of the mechanical seal plan53B system. Attached Figure Description

[0026] Figure 1 This is an overall schematic diagram of the automatic liquid supply device of the mechanical seal plan53B system according to an embodiment.

[0027] Figure 2 This is a schematic diagram of a pneumatic system according to one embodiment.

[0028] Figure 3 This is a schematic diagram of a hydraulic system according to one embodiment.

[0029] Reference numerals: 1. Pneumatic system; 11. Air compressor; 12. Air filter; 121. Inlet compressed gas pipeline; 122. Outlet compressed gas pipeline; 13. Air solenoid valve; 14. Air regulating valve; 15. Air safety valve; 2. Hydraulic system; 21. Pneumatic pump; 211. Inlet air pipeline; 212. Inlet medium pipeline; 22. Medium storage tank; 23. Automatic control valve; 24. Electromagnetic level gauge; 25. Liquid safety valve; 26. First pipeline; 27. Second pipeline; 28. Medium safety valve; 3. Electrical control system; 31. Pressure switch; 32. Pressure transmitter; 33. PLC controller; 4. Check valve; 5. First shut-off valve; 6. Second shut-off valve; 7. Third shut-off valve; 8. Fourth shut-off valve. Detailed Implementation

[0030] The automatic liquid supply device of the mechanical seal plan53B system of this utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0031] like Figures 1 to 3 As shown in a preferred embodiment, the automatic liquid supply device for a mechanical seal plan53B system of the present invention includes a pneumatic system 1, a hydraulic system 2, and an electrical control system 3. The hydraulic system 2 includes a pneumatic pump 21 and a medium storage tank 22. The pneumatic system 1 provides a power source for the pneumatic pump 21, and the pneumatic pump 21 outputs the medium in the medium storage tank 22 to the mechanical seal plan53B system 9. The electrical control system 3 is used to control the start and stop of the pneumatic system 1 and the automatic replenishment of the medium storage tank 22.

[0032] In the above embodiments, the electronic control system 3 can start or stop the pneumatic system 1 according to the pressure in the mechanical seal plan 53B system 9. The pneumatic system 1 provides a power source for the pneumatic pump 21 of the hydraulic system 2. After the pneumatic system 1 is started, the pneumatic pump 21 extracts the medium in the medium storage tank 22 and delivers it to the mechanical seal plan 53B system 9. After the pneumatic system 1 is stopped, the pneumatic pump 21 stops delivering the medium to the mechanical seal plan 53B system 9, which greatly improves the automation of the liquid supply process, reduces manual intervention, and reduces labor intensity. At the same time, the pneumatic system 1 can automatically replenish the medium in the medium storage tank 22, ensuring that there is always a sufficient supply of medium in the medium storage tank 22, avoiding problems such as mechanical seal failure due to insufficient medium, and ensuring the stable operation of the mechanical seal plan 53B system 9. Stable liquid supply can ensure that the mechanical seal plan 53B system 9 receives good lubrication and cooling, reduce the wear and friction of mechanical seal components, thereby extending the service life of the mechanical seal and related equipment, and reducing the maintenance cost and replacement frequency of the equipment.

[0033] like Figure 1 and Figure 2 As shown, in some embodiments, the pneumatic system 1 includes an air compressor 11, an air filter 12, an air solenoid valve 13, and an air regulating valve 14 connected in sequence. The air regulating valve 14 is connected to the pneumatic pump 21. Compressed air from the air compressor 11 enters the air filter 12. The air filtered by the air filter 12 enters the air regulating valve 14 through the air solenoid valve 13. The air regulating valve 14 regulates the air pressure before it enters the pneumatic pump 21. The use of the air solenoid valve 13 allows the start and stop of the pneumatic pump 21 to be flexibly controlled by the electronic control system 3. The air regulating valve 14 can precisely regulate the pressure of the compressed air entering the pneumatic pump 21, ensuring that the pneumatic pump 21 always operates under suitable air pressure conditions. This helps to ensure the stability of the output flow and pressure of the pneumatic pump 21, thereby ensuring a stable and reliable medium supply to the mechanical seal plan53B system 9, improving the performance and service life of the mechanical seal.

[0034] Specifically, the air compressor 11 is the starting component of the pneumatic system 1. Its main function is to compress the outside air, increase the air pressure and energy, and compress the air through internal mechanical structures (such as pistons, screws, etc.) to transform atmospheric air into compressed air with a certain pressure, providing a power source for the operation of subsequent systems.

[0035] The compressed air output from the air compressor 11 often contains impurities such as dust, oil, and moisture. If these impurities directly enter the subsequent pneumatic pump 21 and other components, they will cause wear, corrosion, and other damage, affecting the normal operation and service life of the equipment. The function of the air filter 12 is to purify the compressed air by intercepting impurities in the compressed air through filter media (such as filter screens, filter elements, etc.), making the output compressed air cleaner.

[0036] The air solenoid valve 13 is an electromagnetically controlled valve that controls the flow of compressed air based on signals from the electronic control system 3. When the electronic control system 3 needs to start the pneumatic pump 21, it sends a signal to the air solenoid valve 13 to open it, allowing filtered compressed air to pass through. When the pneumatic pump 21 needs to be stopped, the electronic control system 3 controls the air solenoid valve 13 to close, cutting off the supply of compressed air. In this way, flexible control of the operating status of the pneumatic pump 21 is achieved.

[0037] like Figure 1 and Figure 2As shown, in some embodiments, the pneumatic system 1 further includes an air safety valve 15, which is connected between the air filter 12 and the air regulating valve 14. During operation, the air compressor 11 may experience an abnormally high output compressed air pressure due to its own malfunction, control system failure, or other unexpected situations. The air safety valve 15 can prevent excessive pressure from damaging the air solenoid valve 13 and the air regulating valve 14.

[0038] Even if the air compressor 11 is working normally, brief pressure fluctuations may occur during system operation. These fluctuations may affect the adjustment accuracy of the air regulating valve 14, causing it to be unable to accurately control the air pressure, which in turn affects the working stability of the pneumatic pump 21. The air safety valve 15 can act in time when the pressure fluctuation exceeds the normal range to stabilize the system pressure, ensuring that the air regulating valve 14 and the pneumatic pump 21 can work in a relatively stable pressure environment, thereby improving the reliability and stability of the system.

[0039] like Figure 1 As shown, in some embodiments, the electrical control system 3 includes a PLC controller 33, a pressure switch 31, and a pressure transmitter 32. The pressure switch 31 and the pressure transmitter 32 are installed in the mechanical seal plan 53B system. The PLC controller 33 is electrically connected to the pressure switch 31, the pressure transmitter 32, and the air solenoid valve 13.

[0040] In the above embodiment, pressure switch 31 and pressure transmitter 32, as pressure monitoring elements, are installed in the mechanical seal plan 53B system 9. Pressure switch 31 is a device that generates a switching signal when the pressure reaches a set value, while pressure transmitter 32 converts the pressure signal into an electrical signal and transmits it to PLC controller 33. They monitor the liquid pressure within the mechanical seal plan 53B system 9 in real time and transmit the pressure information to PLC controller 33 in the form of a corresponding signal. Considering cost, pressure switch 31 or pressure transmitter 32 can also be used alone.

[0041] When pressure switch 31 detects that the pressure of mechanical seal plan53B system 9 is lower than the set low-pressure alarm value, or the pressure value fed back by pressure transmitter 32 is lower than the preset low-pressure range, PLC controller 33 will issue a command to energize air solenoid valve 13. At this time, compressed air in pneumatic system 1 can enter pneumatic pump 21 through solenoid valve, and pneumatic pump 21 starts to work, transporting the medium in medium storage tank 22 to mechanical seal plan53B system 9 to increase the liquid pressure in the system. When pressure switch 31 detects that the system pressure is higher than the set high-pressure alarm value, or the pressure value fed back by pressure transmitter 32 is higher than the preset high-pressure range, PLC controller 33 will issue a command to de-energize air solenoid valve 13. After de-energization, air solenoid valve 13 closes, cutting off the supply of compressed air, and pneumatic pump 21 stops working to prevent the system pressure from continuing to rise.

[0042] The entire pressure monitoring, signal processing, and control execution process is automatically completed by the electronic control system 3, eliminating the need for real-time manual monitoring and operation. This not only reduces labor intensity but also minimizes the impact of human factors on system control, improving the automation level and operational efficiency of the mechanical seal plan53B system 9. By precisely setting the alarm values ​​of the pressure switch and pressure transmitter, the PLC controller 33 can promptly adjust the operating status of the pneumatic pump 21 according to changes in system pressure. When the system pressure is too low, it replenishes the medium in a timely manner; when the pressure is too high, it stops the liquid supply, thereby stabilizing the liquid pressure within the mechanical seal plan53B system 9 within a safe and suitable range, ensuring the normal operation of the mechanical seal and extending the service life of the seal components.

[0043] like Figure 1 and Figure 3 In some embodiments, an automatic control valve 23 is connected to the inlet of the medium storage tank 22, and an electromagnetic level gauge 24 is installed on the medium storage tank 22. The electromagnetic level gauge 24 and the automatic control valve 23 are electrically connected to the PLC controller 33. The electromagnetic level gauge 24 is installed on the medium storage tank 22 and can accurately measure the liquid level height of the medium in the medium storage tank 22 in real time. The electromagnetic level gauge 24 works by using the principle of electromagnetic induction, converting the liquid level height information into an electrical signal, which is continuously transmitted to the PLC controller 33.

[0044] After receiving the liquid level electrical signal from the electromagnetic level gauge 24, the PLC controller 33 compares and analyzes it with the preset upper and lower liquid level thresholds. When the liquid level is lower than the lower threshold, the PLC controller 33 sends a control signal to the automatic control valve 23. After receiving the signal, the automatic control valve 23 opens, allowing the medium to flow from the external source into the medium storage tank 22, and starts the liquid replenishment operation.

[0045] When the liquid level exceeds the upper threshold, the PLC controller 33 analyzes the signal and sends a shut-off signal to the automatic control valve 23. The automatic control valve 23 then closes, stopping the replenishment of liquid into the medium storage tank 22. This achieves automated control of the liquid replenishment process in the medium storage tank 22, eliminating the need for constant monitoring of the liquid level and manual operation of the control valve. This significantly improves production efficiency, reduces labor costs and the possibility of human error, and makes the entire replenishment process more efficient, accurate, and stable.

[0046] In the above embodiments, the system can use only one automatic control valve 23 when supplying liquid to a single mechanical seal system, and multiple automatic control valves 23 are required when the system supplies liquid to multiple mechanical seal systems.

[0047] like Figure 1 and Figure 3 In some embodiments, the hydraulic system 2 further includes a liquid safety valve 25. A pneumatic pump 21 is connected to the liquid safety valve 25. The liquid safety valve 25 is connected to a first pipeline 26 and a second pipeline 27. The first pipeline 26 is connected to the mechanical seal plan 53B system 9, and the second pipeline 27 is connected to the medium storage tank 22. When the pneumatic pump 21 delivers the medium from the medium storage tank 22 to the mechanical seal plan 53B system 9, the pressure within the hydraulic system 2 gradually increases with the flow of the medium. When the system pressure is lower than the opening pressure threshold set by the liquid safety valve 25, the liquid safety valve 25 is closed. At this time, the medium flows normally to the mechanical seal plan 53B system 9 through the first pipeline 26 to meet the system's operational requirements.

[0048] When the pressure in the hydraulic system 2 continues to rise and exceeds the opening pressure threshold set by the liquid safety valve 25, the liquid safety valve 25 will automatically open. After opening, a portion of the medium will flow back to the medium storage tank 22 through the second pipeline 27, thereby releasing the excess pressure in the system and rapidly reducing the pressure in the hydraulic system 2 until the pressure drops below the closing pressure threshold of the liquid safety valve 25. Then, the liquid safety valve 25 will close again and return to normal working condition.

[0049] like Figure 1 and Figure 3As shown, in some embodiments, the medium storage tank 22 is connected to a medium safety valve 28, and the second pipeline 27 is connected to the medium safety valve 28. When the hydraulic system 2 is operating normally, the pneumatic pump 21 delivers the medium from the medium storage tank 22 to the mechanical seal plan 53B system 9. When the system pressure is within the normal range and has not reached the opening pressure threshold of the medium safety valve 28, the medium safety valve 28 is closed. When an abnormal situation occurs in the system, causing the pressure to rise sharply and exceed the set pressure threshold of the medium safety valve 28, the medium safety valve 28 opens, and the second pipeline 27 begins to function. It provides a safe venting channel for the overpressured medium, allowing the medium to flow back from the system to the medium storage tank 22. In this way, the pressure within the system is quickly reduced, protecting the safety of the entire system.

[0050] In this embodiment, the medium safety valve 28 and the liquid safety valve 25 cooperate with each other to further improve the reliability of the hydraulic system 2. Even if the liquid safety valve 25 fails and cannot work normally, the medium safety valve 28 can still play its role to provide secondary protection for the system pressure, reducing the risk of system collapse due to the failure of a single safety valve and improving the stability and reliability of the system under complex working conditions.

[0051] like Figure 1 As shown, in some embodiments, a check valve 4 is connected to the inlet of the mechanical seal plan 53B system 9, and the first pipeline 26 is connected to the check valve 4. The check valve 4 prevents potentially contaminated media within the mechanical seal plan 53B system from flowing back into the first pipeline 26 and the upstream hydraulic system 2. During the mechanical sealing process, the media may mix with the sealed media, impurities, etc. If backflow occurs, these contaminated media will enter the originally pure hydraulic system 2, affecting the purity of the media in the entire hydraulic system 2. The presence of the check valve 4 ensures unidirectional flow of the media, helps maintain the purity of the media, and improves the operating efficiency and reliability of the system.

[0052] like Figure 2 As shown, in some embodiments, the pneumatic pump 21 is connected to an air inlet pipe 211 and a medium inlet pipe 212. A first shut-off valve 5 and a second shut-off valve 6 are respectively installed on the air inlet pipe 211 and the medium inlet pipe 212. By adjusting the opening degree of the first shut-off valve 5 and the second shut-off valve 6, the flow rate of gas and medium entering the pneumatic pump 21 can be precisely controlled. According to different operating conditions, the input amount of gas and medium can be flexibly adjusted, thereby changing the output flow rate and pressure of the pneumatic pump 21. For example, when a lower flow rate and pressure are required, the opening degree of the shut-off valve can be appropriately reduced; while when a higher power output is required, the opening degree can be increased, enabling the pneumatic pump 21 to better adapt to various operating conditions and improve the system's operating efficiency.

[0053] like Figure 3As shown, in some embodiments, the air filter 12 is connected to an inlet compressed gas pipeline 121 and an outlet compressed gas pipeline 122, with a third shut-off valve 7 and a fourth shut-off valve 8 respectively installed on the inlet and outlet compressed gas pipelines 121 and 122. In the above scheme, by adjusting the opening degree of the third shut-off valve 7 and the fourth shut-off valve 8, the flow rate and pressure of the compressed gas entering and exiting the air filter 12 can be precisely controlled. Under different operating conditions, the opening degree of the shut-off valves can be flexibly adjusted according to actual needs, enabling the air filter 12 to operate under optimal working conditions and improving filtration efficiency. For example, in applications with high requirements for compressed air quality, the gas flow rate can be appropriately reduced to prolong the residence time of the gas in the filter, thereby improving the filtration effect.

[0054] The working principle and process of the automatic liquid supply device for the mechanical seal plan53B system of this utility model are as follows: When the pressure switch 31 of the electrical control system 3 detects that the pressure of the mechanical seal plan53B system 9 is lower than the set low pressure alarm value, or the pressure value fed back by the pressure transmitter 32 is lower than the preset low pressure range, the PLC controller 33 will issue a command to energize the air solenoid valve 13. At this time, the compressed air in the pneumatic system 1 can enter the pneumatic pump 21 through the solenoid valve. The pneumatic pump 21 starts to work and transports the medium in the medium storage tank 22 to the mechanical seal plan53B system 9 to increase the liquid pressure in the system. When the pressure switch 31 detects that the system pressure is higher than the set high pressure alarm value, or the pressure value fed back by the pressure transmitter 32 is higher than the preset high pressure range, the PLC controller 33 will issue a command to de-energize the air solenoid valve 13. After the air solenoid valve 13 is de-energized, it closes, cutting off the supply of compressed air, and the pneumatic pump 21 stops working to prevent the system pressure from continuing to rise.

[0055] In the description of this utility model, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0057] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0058] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. An automatic liquid supply device for a mechanical seal plan53B system, characterized in that, It includes a pneumatic system, a hydraulic system, and an electrical control system. The hydraulic system includes a pneumatic pump and a medium storage tank. The pneumatic system provides a power source for the pneumatic pump. The pneumatic pump outputs the medium from the medium storage tank to the mechanical seal plan53B system. The electrical control system is used to control the start and stop of the pneumatic system and the automatic replenishment of the medium storage tank.

2. The automatic liquid supply device for the mechanical seal plan53B system according to claim 1, characterized in that, The pneumatic system includes an air compressor, an air filter, an air solenoid valve, and an air regulating valve connected in sequence, with the air regulating valve connected to the pneumatic pump.

3. The automatic liquid supply device for the mechanical seal plan53B system according to claim 2, characterized in that, The pneumatic system also includes an air safety valve connected between the air filter and the air regulating valve.

4. The automatic liquid supply device for the mechanical seal plan53B system according to claim 2, characterized in that, The electrical control system includes a PLC controller, a pressure switch, and a pressure transmitter. The pressure switch and pressure transmitter are installed in the mechanical seal plan53B system. The PLC controller is electrically connected to the pressure switch, the pressure transmitter, and the air solenoid valve.

5. The automatic liquid supply device for the mechanical seal plan53B system according to claim 4, characterized in that, An automatic control valve is connected to the inlet of the medium storage tank, and an electromagnetic level gauge is installed on the medium storage tank. The electromagnetic level gauge and the automatic control valve are electrically connected to the PLC controller.

6. The automatic liquid supply device for the mechanical seal plan53B system according to claim 1, characterized in that, The hydraulic system also includes a liquid safety valve, the pneumatic pump is connected to the liquid safety valve, the liquid safety valve is connected to a first pipeline and a second pipeline, the first pipeline is connected to the mechanical seal plan53B system, and the second pipeline is connected to the medium storage tank.

7. The automatic liquid supply device for the mechanical seal plan53B system according to claim 6, characterized in that, The medium storage tank is connected to a medium safety valve, and the second pipeline is connected to the medium safety valve.

8. The automatic liquid supply device for the mechanical seal plan53B system according to claim 6, characterized in that, The inlet of the mechanical seal plan53B system is connected to a check valve, and the first pipeline is connected to the check valve.

9. The automatic liquid supply device for the mechanical seal plan53B system according to claim 1, characterized in that, The pneumatic pump is connected to an air inlet pipe and a medium inlet pipe, and the air inlet pipe and the medium inlet pipe are respectively equipped with a first shut-off valve and a second shut-off valve.

10. The automatic liquid supply device for the mechanical seal plan53B system according to claim 2, characterized in that, The air filter is connected to an inlet compressed gas pipeline and an outlet compressed gas pipeline, and a third shut-off valve and a fourth shut-off valve are respectively installed on the inlet compressed gas pipeline and the outlet compressed gas pipeline.

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