Intelligent control type pneumatic electromagnetic valve for double-connection energy-saving hydraulic station

Abstract

The application relates to the technical field of pneumatic electromagnetic valves, in particular to an intelligent control type pneumatic electromagnetic valve for a double-connection energy-saving hydraulic station, which comprises a valve body, an air inlet is formed in the upper end of the valve body, and an air outlet is formed in the lower end of the valve body; a valve cavity is horizontally formed in the valve body, the valve cavity is composed of a reset cavity, an intermediate cavity, an air inlet cavity, a conical cavity, an air outlet cavity and a sealing cavity, and a valve core is movably connected in the valve cavity; a gas collecting chamber is formed in one end of the reset cavity and the intermediate cavity where the valve core is arranged, the gas collecting chamber is respectively connected with a first air feeding groove and a second air feeding groove which are formed in the valve core shaft, and the valve core is respectively provided with a first sealing ring, a second sealing ring, a third sealing ring and a fourth sealing ring. The application solves the problems of poor air inlet pressure fluctuation adaptability and insufficient valve cavity sealing reliability of the existing pneumatic electromagnetic valve.

Description

Technical Field

[0001] This invention relates to the field of pneumatic solenoid valve technology, specifically to an intelligent control pneumatic solenoid valve for a dual-unit energy-saving hydraulic power station. Background Technology

[0002] As an important actuator in industrial automation control systems, pneumatic solenoid valves are widely used in the pilot control circuits of various hydraulic stations. In dual-unit energy-saving hydraulic stations, pneumatic solenoid valves are typically used to control the on / off and reversal of compressed air to drive the hydraulic valve group to achieve the switching, unloading, and loading of the two pumps, thereby achieving the purpose of energy saving and efficiency improvement.

[0003] However, existing pneumatic solenoid valves used in hydraulic power units still have the following technical problems in practical applications:

[0004] First, there is a problem of poor adaptability to air pressure fluctuations. The working environment of the dual-link energy-saving hydraulic station is complex. Its air source is often not independent and is easily affected by factors such as pressure fluctuations in the workshop pipeline network and simultaneous air use by multiple devices. When the gas pressure delivered by the air inlet (P port) suddenly becomes too high or surges to the top, the existing solenoid valve lacks an effective pressure buffer and relief mechanism inside the valve cavity. The continuous high pressure impact will not only directly act on the valve core end face, but also increase the impact force between the valve core and the valve body, causing the valve core to jam or the seals to wear faster.

[0005] Secondly, the reliability of the valve cavity sealing structure is insufficient. During frequent reversing operations, the valve core and valve body, as well as the connections between various air ports, face severe sealing challenges. Especially under the aforementioned unstable air pressure conditions, the existing sealing structure often struggles to balance "movement flexibility" and "static sealing." The long-term reciprocating motion of the valve core can easily lead to wear of the sealing ring, resulting in internal leakage. This prevents the pilot air pressure from being established or maintained, causing the hydraulic valve to malfunction. Summary of the Invention

[0006] The purpose of this invention is to provide an intelligent control pneumatic solenoid valve for a dual-unit energy-saving hydraulic station, in order to solve the problems of large fluctuations in intake pressure and insufficient reliability of valve cavity sealing structure mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an intelligent control pneumatic solenoid valve for a dual-unit energy-saving hydraulic station, comprising a valve body, an air inlet at the upper end of the valve body, and an exhaust port at the lower end of the valve body; a valve cavity is horizontally formed inside the valve body, the valve cavity consisting of a reset cavity, an intermediate cavity, an air inlet cavity, a conical cavity, an exhaust cavity, and a sealing cavity, and a valve core is movably connected within the valve cavity; an air collecting chamber is formed at one end of the valve core located between the reset cavity and the intermediate cavity, and the air collecting chamber is respectively connected to a valve core located within the valve core. The valve core has a first air delivery groove and a second air delivery groove. A first sealing ring, a second sealing ring, a third sealing ring, and a fourth sealing ring are respectively installed on the valve core. A pressure chamber is formed in the bottom wall of the air inlet chamber. A baffle is slidably connected in the pressure chamber. A retraction rod is fixedly connected to the bottom end of the baffle. A U-shaped groove is formed in the bottom end of the retraction rod. A pressure relief port connected to the pressure chamber is formed at the bottom of the valve body. A fourth air delivery groove is formed on the inner wall of the top of the pressure chamber. The other end of the fourth air delivery groove is connected to the pressure relief port.

[0008] Furthermore, an end cap is fixedly installed at one end of the valve body, and an electromagnetic coil is fixedly installed at the other end of the valve body, with a wiring port fixedly installed on the electromagnetic coil.

[0009] Furthermore, the end cap has an installation groove at one end facing the reset cavity, and a first spring is provided inside the reset cavity. The two ends of the first spring are respectively fixedly connected to the inner wall of the installation groove and the end of the valve core. A fixing rod is fixedly connected to the inner wall of the installation groove, and the first spring is sleeved on the body of the fixing rod. A push plate is fixedly connected to one end of the fixing rod placed in the air collection chamber.

[0010] Furthermore, the connection between the first air delivery groove and the air collection chamber is located at the end of the air collection chamber closer to the end cover, and the connection between the second air delivery groove and the air collection chamber is located at the end of the air collection chamber farther from the end cover.

[0011] Furthermore, the valve core is provided with a first annular groove on the shaft of the intermediate cavity that communicates with the second air delivery groove, and the first sealing ring is installed in the groove of the first annular groove.

[0012] Furthermore, a first fixing ring is fixedly connected to the shaft of the valve core placed in the air intake chamber, a second fixing ring is fixedly connected to the shaft of the valve core placed in the conical cavity, the second sealing ring is installed on the outer ring of the first fixing ring, an inner groove communicating with the first air delivery groove is opened at the inner ring of the second sealing ring, and the third sealing ring is installed on the outer ring of the second fixing ring.

[0013] Furthermore, a third fixing ring is fixedly connected to the shaft of the valve core placed in the exhaust chamber and the sealing chamber. The third fixing ring placed in the exhaust chamber has a third air delivery groove on its ring body, and a second annular groove connected to the third air delivery groove is opened on its ring body placed in the sealing chamber. The fourth sealing ring is installed in the groove of the second annular groove.

[0014] Furthermore, a valve is fixedly installed at the port of the pressure relief port, and a pressure sensor is fixedly installed on the valve.

[0015] Furthermore, a second spring is provided in the pressure chamber, with the upper and lower ends of the second spring fixed to the bottom end of the baffle and the bottom wall of the pressure chamber, respectively, and the second spring is sleeved on the rod of the retraction rod.

[0016] Furthermore, when the pressure in the pressure chamber exceeds the critical value, the baffle and the retraction rod descend to the lowest point. At this time, the pressure relief port, the U-shaped groove, and the fourth air delivery groove are connected.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. This dual-unit energy-saving hydraulic power unit uses an intelligent control pneumatic solenoid valve. Through a pressure regulating mechanism composed of a pressure chamber, baffle, retraction rod, pressure sensor, and valve, it can automatically detect the inlet pressure. When the pressure exceeds the critical value, it quickly opens the pressure relief channel to discharge high-pressure gas. After the pressure stabilizes, it automatically closes, effectively buffering the impact caused by air pressure fluctuations, avoiding valve core jamming and accelerated wear of seals, improving the adaptability of the solenoid valve to complex working environments, and ensuring the stable operation of the hydraulic power unit.

[0019] 2. This dual-unit energy-saving hydraulic station uses an intelligent control pneumatic solenoid valve. During normal operation, it uses gas pressure to drive the first and fourth sealing rings to adhere to the pipe wall, enhancing the sealing effect and preventing gas leakage. When not in operation, the sealing rings are in a relaxed state, reducing long-term pressure wear. At the same time, during reset, the second sealing ring is driven by gas to further strengthen the seal, extending the service life of the sealing components and reducing maintenance costs. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0022] Figure 3 A cross-sectional view of the valve body of the present invention. Figure 1 ;

[0023] Figure 4 For the present invention Figure 3 Enlarged structural diagram of section A;

[0024] Figure 5 For the present invention Figure 3 Enlarged structural diagram of section B;

[0025] Figure 6 For the present invention Figure 3 Enlarged structural diagram of section C;

[0026] Figure 7 For the present invention Figure 3 Enlarged structural diagram of section D in the middle;

[0027] Figure 8 For the present invention Figure 3 Enlarged structural diagram of section E in the middle;

[0028] Figure 9 A cross-sectional view of the valve body of the present invention. Figure 2 ;

[0029] Figure 10 A cross-sectional view of the valve body of the present invention. Figure 3 .

[0030] In the attached diagram, the components represented by each number are as follows:

[0031] 1. Valve body; 2. Air inlet; 3. Solenoid coil; 4. Wiring port; 5. End cap; 501. Mounting groove; 6. Exhaust port; 7. Pressure relief port; 8. Valve chamber; 801. Reset chamber; 802. Intermediate chamber; 803. Air inlet chamber; 804. Conical chamber; 805. Exhaust chamber; 806. Sealing chamber; 9. Valve core; 10. Fixing rod; 11. First spring; 12. Air collection chamber; 13. Push plate; 14. First air delivery groove; 15. Second air delivery groove; 6. First annular groove; 17. First sealing ring; 18. First fixing ring; 19. Second sealing ring; 20. Inner groove; 21. Second fixing ring; 22. Third sealing ring; 23. Third fixing ring; 24. Third air supply groove; 25. Second annular groove; 26. Fourth sealing ring; 27. Pressure chamber; 28. Baffle; 29. ​​Second spring; 30. Retraction rod; 31. U-shaped groove; 32. Fourth air supply groove; 33. Valve; 34. Pressure sensor. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] This invention provides a technical solution: such as Figure 1 - Figure 10 The diagram shows an intelligent control pneumatic solenoid valve for a dual-unit energy-saving hydraulic station, comprising a valve body 1, an air inlet 2 at the upper end of the valve body 1, and an exhaust port 6 at the lower end of the valve body 1; a valve chamber 8 is horizontally formed inside the valve body 1, the valve chamber 8 consisting of a reset chamber 801, an intermediate chamber 802, an air inlet chamber 803, a conical chamber 804, an exhaust chamber 805, and a sealing chamber 806, and a valve core 9 is movably connected within the valve chamber 8; an air collecting chamber 12 is formed at one end of the valve core 9 located between the reset chamber 801 and the intermediate chamber 802, and the air collecting chamber 12 is respectively connected to a first air supply line formed within the shaft of the valve core 9. The valve core 9 is equipped with a first sealing ring 17, a second sealing ring 19, a third sealing ring 22, and a fourth sealing ring 26, respectively, on the groove 14 and the second air supply groove 15. A pressure chamber 27 is provided on the bottom wall of the air inlet chamber 803. A baffle 28 is slidably connected inside the pressure chamber 27. A retraction rod 30 is fixedly connected to the bottom end of the baffle 28. A U-shaped groove 31 is provided at the bottom end of the retraction rod 30. A pressure relief port 7 is provided at the bottom of the valve body 1 and communicates with the pressure chamber 27. A fourth air supply groove 32 is provided on the inner wall of the top of the pressure chamber 27. The other end of the fourth air supply groove 32 is connected to the pressure relief port 7.

[0034] In this invention, all internal components are installed inside the valve body 1, thereby ensuring the stability and sealing of the structure. The air inlet 2 is used to connect to an external air source and receive compressed air, while the exhaust port 6 discharges the gas passing through the valve chamber 8, completing the opening and closing and reversal of the gas flow. The valve chamber 8 is divided into six chambers with different functions. The reset chamber 801 is used to reset the valve core 9, the intermediate chamber 802 is responsible for intermediate transition and sealing enhancement, the air inlet chamber 803 is the first residence space after the gas enters, the conical chamber 804 plays the role of gas guiding and auxiliary sealing, the exhaust chamber 805 guides the gas flow to the exhaust port 6, and the sealing chamber 806 seals the end to prevent gas leakage.

[0035] The valve core 9 achieves gas channel switching and sealing through its own movement. The gas collection chamber 12 is located at the end of the valve core 9 and is used to collect and distribute gas to provide a gas source for subsequent pushing of the sealing ring to enhance the seal. The first gas delivery groove 14 and the second gas delivery groove 15 are gas channels inside the valve core 9, which respectively deliver the gas in the gas collection chamber 12 to different sealing ring positions to achieve sealing at different positions. The first sealing ring 17, the second sealing ring 19, the third sealing ring 22, and the fourth sealing ring 26 correspond to the sealing requirements of different cavities, preventing gas from flowing between cavities and solving the problem of insufficient reliability of the existing sealing structure.

[0036] The baffle 28 inside the intake chamber 803 can sense changes in intake pressure. When the pressure is too high, it will move downwards. The retraction rod 30 moves with the baffle 28. The U-shaped groove 31 at its bottom is used to connect the fourth air delivery groove 32 and the pressure relief port 7 to form a pressure relief channel. The fourth air delivery groove 32 is the channel for gas to flow from the intake chamber 803 to the pressure relief port 7. The pressure relief port 7 discharges excess high-pressure gas, balances the pressure in the intake chamber 803, and avoids high-pressure impact from damaging the valve core 9 and the seals. This solves the problem of poor adaptability to intake pressure fluctuations in existing solenoid valves.

[0037] refer to Figure 1 - Figure 10 An end cap 5 is fixedly installed at one end of the valve body 1, and an electromagnetic coil 3 is fixedly installed at the other end of the valve body 1. A wiring port 4 is fixedly installed on the electromagnetic coil 3. An installation groove 501 is opened at the end of the end cap 5 facing the reset cavity 801. A first spring 11 is provided in the reset cavity 801. The two ends of the first spring 11 are fixedly connected to the inner wall of the installation groove 501 and the end of the valve core 9, respectively. A fixing rod 10 is fixedly connected to the inner wall of the installation groove 501. The first spring 11 is sleeved on the rod body of the fixing rod 10. A push plate 13 is fixedly connected to the end of the fixing rod 10 placed in the air collecting chamber 12. The communication point between the first air delivery groove 14 and the air collecting chamber 12 is located at the end of the air collecting chamber 12 near the end cap 5. The communication point between the second air delivery groove 15 and the air collecting chamber 12 is located at the end of the air collecting chamber 12 away from the end cap 5. A first ring is opened on the shaft of the valve core 9 placed in the intermediate cavity 802, which is connected to the second air delivery groove 15. A first sealing ring 17 is installed in the groove of the first annular groove 16; a first fixing ring 18 is fixedly connected to the shaft of the valve core 9 placed in the intake chamber 803; a second fixing ring 21 is fixedly connected to the shaft of the valve core 9 placed in the conical cavity 804; a second sealing ring 19 is installed on the outer ring of the first fixing ring 18; an inner groove 20 communicating with the first air delivery groove 14 is opened at the inner ring of the second sealing ring 19; a third sealing ring 22 is installed on the outer ring of the second fixing ring 21; a third fixing ring 23 is fixedly connected to the shaft of the valve core 9 placed in the exhaust chamber 805 and the sealing chamber 806; a third air delivery groove 24 is opened on the ring of the third fixing ring 23 placed in the exhaust chamber 805; a second annular groove 25 communicating with the third air delivery groove 24 is opened on the ring of the third fixing ring 23 placed in the sealing chamber 806; and a fourth sealing ring 26 is installed in the groove of the second annular groove 25.

[0038] In this invention, the end cap 5 at one end of the valve body 1 is used to seal the reset chamber 801 and provide a mounting base for the first spring 11 and the fixing rod 10. The electromagnetic coil 3 at the other end is the power source for the movement of the valve core 9. It generates magnetic force to drive the valve core 9 to move by energizing it. The wiring port 4 is used to connect to an external control circuit to realize the on / off control of the electromagnetic coil 3. The mounting groove 501 is opened on the end cap 5 and is specifically used to install the first spring 11. The fixing rod 10 is fitted inside the first spring 11 to limit the movement and prevent the first spring 11 from shifting during the extension and retraction process. The push plate 13 is fixed to the end of the fixing rod 10 and placed in the gas collecting chamber 12. When the valve core 9 moves, the push plate 13 can squeeze the gas in the gas collecting chamber 12 to provide power for further enhancing the sealing effect.

[0039] The first air delivery groove 14 and the second air delivery groove 15 are connected at different positions on the air collection chamber 12, and correspond to different sealing rings respectively. The first annular groove 16 is opened at the intermediate cavity 802 of the valve core 9 to install the first sealing ring 17, and at the same time serves as a temporary storage space for gas. After the gas delivered by the second air delivery groove 15 enters the first annular groove 16, it will press against the first sealing ring 17, so that the first sealing ring 17 fits more tightly against the pipe wall of the intermediate cavity 802, enhancing the sealing effect and preventing gas from leaking from the air inlet cavity 803 into the intermediate cavity 802.

[0040] The first retaining ring 18 and the second retaining ring 21 are respectively fixed at different positions of the valve core 9, used to install the second sealing ring 19 and the third sealing ring 22, serving to fix and limit the sealing rings; Reference Figure 6 , Figure 6 The positions of the first fixing ring 18 and the second fixing ring 21 shown represent the state when the solenoid valve is closed. When the solenoid valve is open, under the control of the solenoid coil 3, the first fixing ring 18 moves into the intake chamber 803, and the first fixing ring 18 and the second sealing ring 19 no longer abut against the inner wall of the conical cavity 804. The second fixing ring 21 moves into the conical cavity 804, and the second fixing ring 21 and the third sealing ring 22 no longer abut against the inner wall of the exhaust chamber 805. The inner groove 20 of the inner ring of the second sealing ring 19 communicates with the first air delivery groove 14. When the gas in the gas collecting chamber 12 enters the inner groove 20 through the first air delivery groove 14, it will push up the second sealing ring 19, making the second sealing ring 19 tightly adhere to the inner wall of the conical cavity 804, thus improving the sealing reliability. The third sealing ring 22 is directly installed on the outer ring of the second fixing ring 21, mainly playing a basic sealing role to prevent gas from flowing between the conical cavity 804 and the exhaust chamber 805.

[0041] The third fixing ring 23 is fixed at the exhaust chamber 805 and sealing chamber 806 of the valve core 9. The third air delivery groove 24 is used to deliver the gas in the exhaust chamber 805 to the second annular groove 25. The second annular groove 25 is equipped with the fourth sealing ring 26. After the gas enters the second annular groove 25, it will press against the fourth sealing ring 26, so that the fourth sealing ring 26 is tightly attached to the pipe wall of the sealing chamber 806, preventing the gas from leaking from the exhaust chamber 805 to the sealing chamber 806. At the same time, this gas-driven sealing method will only make the first sealing ring 17 and the fourth sealing ring 26 tightly attached when the solenoid valve is working. When not working, they are in a relaxed state, which can extend the service life of the sealing ring.

[0042] refer to Figure 1 - Figure 10 A valve 33 is fixedly installed at the port of the pressure relief port 7, and a pressure sensor 34 is fixedly installed on the valve 33. A second spring 29 is provided in the pressure chamber 27. The upper and lower ends of the second spring 29 are fixed to the bottom end of the baffle 28 and the bottom wall of the pressure chamber 27, respectively. The second spring 29 is sleeved on the rod of the retraction rod 30. When the pressure in the pressure chamber 27 exceeds the critical value, the baffle 28 and the retraction rod 30 descend to the bottom. At this time, the pressure relief port 7, the U-shaped groove 31 and the fourth air delivery groove 32 are connected.

[0043] In this invention, valve 33 at the pressure relief port 7 is used to control the opening and closing of the pressure relief channel. Pressure sensor 34 detects the air pressure at pressure relief port 7 in real time, or directly detects the pressure inside pressure chamber 27. When the detected pressure reaches a critical value, valve 33 is opened to relieve pressure. After the pressure returns to normal, valve 33 is closed to achieve intelligent pressure regulation. The second spring 29 inside pressure chamber 27 is sleeved on the retraction rod 30 and remains in an extended state under normal conditions, supporting baffle 28 and blocking the fourth... When the pressure inside the air inlet chamber 803 increases, the gas pushes the baffle 28 downward to compress the second spring 29. When the pressure reaches the critical value, the baffle 28 descends to the bottom, and the U-shaped groove 31 on the retraction rod 30 connects the lower opening of the fourth air delivery groove 32 and the pressure relief port 7, forming a complete pressure relief channel to discharge excess gas. After the pressure stabilizes, the elastic force of the second spring 29 pushes the baffle 28 and the retraction rod 30 to reset, blocking the fourth air delivery groove 32 again and closing the pressure relief channel.

[0044] Pressure detection can be achieved in two ways: one is by directly detecting the pressure inside the pressure chamber 27 using the pressure sensor 34, and the other is by detecting the air pressure at the pressure relief port 7. Both methods can determine the critical value and ensure the accuracy of pressure regulation.

[0045] Working principle: Compressed air from an external air source first enters through the air inlet 2 at the top of the valve body 1 and flows directly into the air inlet chamber 803 of the valve chamber 8. If the air inlet pressure is unstable or excessive, the high-pressure gas in the air inlet chamber 803 will act on the baffle 28 in the pressure chamber 27, generating a downward thrust. When this thrust is greater than the supporting force of the second spring 29, the baffle 28 will move downward, compressing the second spring 29. As the baffle 28 moves downward, the opening at the top of the fourth air delivery groove 32, which was originally blocked by the baffle 28, will be opened, allowing some of the high-pressure gas in the air inlet chamber 803 to enter the fourth air delivery groove 32.

[0046] If the intake pressure continues to increase and reaches a preset critical value, the baffle 28 will be pushed to the bottom. At this time, the retraction rod 30, which is fixedly connected to the baffle 28, will also move to the bottom simultaneously. The U-shaped groove 31 at the bottom of the retraction rod 30 is connected to the lower opening of the fourth air supply groove 32 and the pressure relief port 7, forming a complete pressure relief channel. At the same time, the pressure sensor 34 will detect that the pressure has reached the critical value (whether it is directly detecting the pressure in the pressure chamber 27 or detecting the air pressure at the pressure relief port 7). Subsequently, the pressure sensor 34 sends a signal to control the valve 33 to open. The high-pressure gas in the fourth air supply groove 32 flows into the pressure relief port 7 through the U-shaped groove 31, and then is discharged to the outside of the valve body 1 through the opened valve 33, thereby quickly balancing the pressure in the intake chamber 803 and avoiding impact damage to the valve core 9 and the seals caused by the high-pressure gas.

[0047] Once the pressure in the intake chamber 803 stabilizes, the thrust acting on the baffle 28 decreases, and the elastic force of the second spring 29 pushes the baffle 28 upward to reset. The baffle 28 then blocks the opening at the upper end of the fourth air delivery groove 32 again. At the same time, the pressure sensor 34 detects that the pressure is below the critical value, and the control valve 33 closes, the pressure relief channel is closed, and the entire pressure regulation process is completed, ensuring that the air pressure entering the valve chamber 8 remains stable.

[0048] Once the air pressure in the intake chamber 803 stabilizes, the solenoid valve enters normal operation. It energizes the solenoid coil 3 through the wiring port 4, generating magnetic force that drives the valve core 9 to move toward the end cover 5. As the valve core 9 moves, the first fixing ring 18 and the second sealing ring 19 on the valve core 9 no longer press against the inner wall of the conical cavity 804, and the second fixing ring 21 and the third sealing ring 22 no longer press against the pipe wall of the valve cavity 8 (i.e., the transition pipe between the conical cavity 804 and the exhaust cavity 805). The gas in the intake chamber 803 can flow smoothly through the conical cavity 804 into the exhaust cavity 805, and then from the exhaust cavity 805 to the exhaust port 6 at the lower end of the valve body 1, and finally out of the solenoid valve, realizing the normal on / off and reversal of the gas, and providing stable compressed air for the pilot control circuit of the dual-link energy-saving hydraulic station.

[0049] As the valve core 9 moves toward the end cover 5, the end of the valve core 9 near the end cover 5 will compress the first spring 11 in the reset chamber 801, putting the first spring 11 in a compressed state. At the same time, the push plate 13 at the end of the fixing rod 10 will compress the gas in the gas collecting chamber 12, causing the gas in the gas collecting chamber 12 to generate pressure. This part of the pressurized gas will be transported through two paths: one path is through the second air delivery groove 15 to the first annular groove 16 at the position of the intermediate cavity 802 of the valve core 9. The gas entering the first annular groove 16 will press against the first sealing ring 17 installed in the groove, causing the first sealing ring 17 to expand outward and fit more tightly against the tube wall of the intermediate cavity 802, thereby effectively preventing the gas in the air inlet chamber 803 from leaking from the intermediate cavity 802 and improving the sealing reliability; the other path is the gas delivery during subsequent reset.

[0050] Meanwhile, the gas flowing into the exhaust chamber 805 will flow into the second annular groove 25 through the third air delivery groove 24 on the third fixed ring 23. After the gas enters the second annular groove 25, it will press against the fourth sealing ring 26 installed in the groove, causing the fourth sealing ring 26 to expand outward and fit more closely to the pipe wall of the sealing chamber 806, preventing gas from leaking from the exhaust chamber 805 into the sealing chamber 806. The advantage of this dynamic sealing method is that the first sealing ring 17 and the fourth sealing ring 26 will only fit tightly against the pipe wall under the action of gas pressure when the solenoid valve is working normally. When not working, they are in a relaxed state, avoiding wear caused by long-term pressure on the sealing ring and effectively extending the service life of the sealing ring.

[0051] When the intake process is finished and the solenoid valve needs to be closed, the power supply to the solenoid coil 3 is cut off through the wiring port 4. The magnetic force of the solenoid coil 3 disappears, and the first spring 11, which is in a compressed state, will release its elastic force, pushing the valve core 9 to reset away from the end cover 5. The push plate 13 also resets and no longer squeezes the gas in the gas collection chamber 12. As the valve core 9 resets, the first fixing ring 18 and the second sealing ring 19 will abut against the inner wall of the conical cavity 804 again, and the second fixing ring 21 and the third sealing ring 22 will also abut against the pipe wall of the valve cavity 8 (the transition pipe between the conical cavity 804 and the exhaust cavity 805) again, achieving a basic seal between the intake cavity 803 and the exhaust cavity 805.

[0052] Meanwhile, after the push plate 13 is reset, the gas in the gas collecting chamber 12 is delivered to the inner groove 20 of the inner ring of the second sealing ring 19 through the first gas delivery groove 14. After the gas enters the inner groove 20, it will push up the second sealing ring 19, making the second sealing ring 19 fit more tightly against the inner wall of the conical cavity 804, further enhancing the sealing effect, preventing residual gas leakage, and ensuring the sealing reliability after the solenoid valve is closed. At this time, the first sealing ring 17 and the fourth sealing ring 26 lose the effect of gas pressure and return to their natural state, preparing for the next operation.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A smart control pneumatic solenoid valve for a dual-unit energy-saving hydraulic power station, comprising a valve body (1), characterized in that: The valve body (1) has an air inlet (2) at its upper end and an exhaust port (6) at its lower end. The valve body (1) has a horizontally opened valve chamber (8), which is composed of a reset chamber (801), an intermediate chamber (802), an air inlet chamber (803), a conical chamber (804), an exhaust chamber (805), and a sealing chamber (806). A valve core (9) is movably connected inside the valve chamber (8). The valve core (9) is located at one end of the reset chamber (801) and the intermediate chamber (802) and has an air collection chamber (12). The air collection chamber (12) is connected to a first air delivery groove (14) and a second air delivery groove (15) opened in the shaft of the valve core (9). The valve core (9) is equipped with a first sealing ring (17), a second sealing ring (19), a third sealing ring (22) and a fourth sealing ring (26). The bottom wall of the air inlet chamber (803) is provided with a pressure chamber (27), and a baffle (28) is slidably connected inside the pressure chamber (27). A retraction rod (30) is fixedly connected to the bottom end of the baffle (28), and a U-shaped groove (31) is provided at the bottom end of the retraction rod (30). A pressure relief port (7) connected to the pressure chamber (27) is provided at the bottom of the valve body (1). A fourth air delivery groove (32) is provided on the inner wall of the top of the pressure chamber (27), and the other end of the fourth air delivery groove (32) is connected to the pressure relief port (7). The pressure chamber (27) is provided with a second spring (29). The upper and lower ends of the second spring (29) are fixed to the bottom end of the baffle (28) and the bottom wall of the pressure chamber (27), respectively. The second spring (29) is sleeved on the rod body of the retraction rod (30). When the pressure in the pressure chamber (27) exceeds the critical value, the baffle (28) and the retraction rod (30) descend to the bottom. At this time, the pressure relief port (7), the U-shaped groove (31) and the fourth air supply groove (32) are connected. The valve core (9) is fixedly connected to the shaft of the air intake chamber (803) with a first fixing ring (18). The valve core (9) is fixedly connected to the shaft of the conical cavity (804) with a second fixing ring (21). The second sealing ring (19) is installed on the outer ring of the first fixing ring (18). The inner ring of the second sealing ring (19) is provided with an inner groove (20) that communicates with the first air delivery groove (14). The third sealing ring (22) is installed on the outer ring of the second fixing ring (21).

2. The intelligent control pneumatic solenoid valve for a dual-unit energy-saving hydraulic station according to claim 1, characterized in that: An end cap (5) is fixedly installed at one end of the valve body (1), and an electromagnetic coil (3) is fixedly installed at the other end of the valve body (1). A wiring port (4) is fixedly installed on the electromagnetic coil (3).

3. The intelligent control pneumatic solenoid valve for a dual-unit energy-saving hydraulic station according to claim 2, characterized in that: The end cap (5) has an installation groove (501) at one end facing the reset cavity (801). The reset cavity (801) is provided with a first spring (11). The two ends of the first spring (11) are fixedly connected to the inner wall of the installation groove (501) and the end of the valve core (9), respectively. A fixing rod (10) is fixedly connected to the inner wall of the installation groove (501). The first spring (11) is sleeved on the rod body of the fixing rod (10). A push plate (13) is fixedly connected to one end of the fixing rod (10) placed in the air collection chamber (12).

4. The intelligent control pneumatic solenoid valve for a dual-unit energy-saving hydraulic station according to claim 1, characterized in that: The connection between the first air delivery groove (14) and the air collection chamber (12) is located at one end of the air collection chamber (12) near the end cap (5), and the connection between the second air delivery groove (15) and the air collection chamber (12) is located at one end of the air collection chamber (12) away from the end cap (5).

5. The intelligent control pneumatic solenoid valve for a dual-unit energy-saving hydraulic station according to claim 1, characterized in that: The valve core (9) is located on the shaft of the intermediate cavity (802) and has a first annular groove (16) that communicates with the second air delivery groove (15). The first sealing ring (17) is installed in the groove of the first annular groove (16).

6. The intelligent control pneumatic solenoid valve for a dual-unit energy-saving hydraulic station according to claim 1, characterized in that: A third fixing ring (23) is fixedly connected to the shaft of the valve core (9) placed in the exhaust chamber (805) and the sealing chamber (806). The third fixing ring (23) in the exhaust chamber (805) has a third air delivery groove (24) on its ring body. The third fixing ring (23) in the sealing chamber (806) has a second annular groove (25) that communicates with the third air delivery groove (24). The fourth sealing ring (26) is installed in the groove of the second annular groove (25).

7. The intelligent control pneumatic solenoid valve for a dual-unit energy-saving hydraulic station according to claim 1, characterized in that: A valve (33) is fixedly installed at the port of the pressure relief port (7), and a pressure sensor (34) is fixedly installed on the valve (33).

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