Energy-saving bistable pressure maintaining electromagnetic valve

Abstract

The invention relates to the field of valve equipment, and discloses an energy-saving bistable pressure maintaining electromagnetic valve which comprises a valve body, an electromagnetic valve core, an electromagnetic valve core and an electromagnetic valve core. The top surface of the non-return sheet is used for sealing the air inlet; the valve element is movably connected into the valve body, the top end of the valve element is fixedly connected with a sealing cap, a coil for driving the valve element to move is arranged in the valve body, and the valve element drives the sealing cap to move between the bottom face of the non-return piece and an inlet of the air leakage opening. The bottom surface of the sealing cap is used for sealing an inlet of the air release port; the spring is used for driving the valve element to move upwards so that the sealing cap can abut against the bottom face of the non-return piece. The device is simple in structure, power-saving, free of temperature rise, quiet in operation and good in pressure maintaining effect.

Description

Technical Field

[0001] The invention relates to the field of valves, and in particular to an energy-saving bistable pressure-maintaining solenoid valve. Background Art

[0002] A pressure-maintaining valve is a valve used to control the pressure of a fluid medium. Its working principle is to maintain the pressure in the system within a set range by automatically adjusting the medium flow rate. Its working principle is as follows: Pressure regulation: When the pressure in the system is higher than the set value, the valve core of the pressure maintaining valve opens, releasing part of the fluid to reduce the pressure; when the pressure is lower than the set value, the valve core closes, restricting the flow of fluid and increasing the pressure in the system.

[0003] Air pressure balance: Based on the air pressure balance principle, the coordinated action of the valve core and the spring, as well as the sealing action between the valve core and the valve seat, can achieve stable regulation of the air pressure system pressure.

[0004] The current pressure-maintaining valves are all pressure-maintaining solenoid valves, which control the movement of the valve core through a coil to ensure the stability of the pressure in the system. In order to maintain the pressure, the solenoid valve needs to work for a long time, which consumes a lot of power. In addition, the sealing piece used to seal the air inlet is also supported by the valve core for a long time, causing the sealing piece to stick to the air inlet and causing the valve to fail. The solenoid valve is powered on for a long time, and the coil heats up, causing the components to run at high temperature and be easily damaged. There are many problems such as loud noise due to air leakage. Summary of the invention

[0005] In view of this, it is necessary to provide an energy-saving bistable pressure-maintaining solenoid valve with a simple structure, power saving, no temperature rise, quiet operation and good pressure-maintaining effect.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: an energy-saving bistable pressure-maintaining solenoid valve, comprising: A valve body, wherein the valve body has an air inlet, an air outlet and an air release port that are interconnected; A check plate, the top surface of which is used to seal the air inlet; A valve core, the valve core is movably connected to the valve body, a sealing cap is fixedly connected to the top of the valve core, a coil for driving the valve core to move is arranged in the valve body, the valve core drives the sealing cap to move between the bottom surface of the check plate and the entrance of the air vent, and the bottom surface of the sealing cap is used to seal the entrance of the air vent; A spring, the spring being used to drive the valve core to move upward so that the sealing cap presses against the bottom surface of the check plate; An adsorbent, the adsorbent is fixedly connected to the valve body, one of the valve core and the adsorbent is a magnet, the other is made of magnetic material, or the valve core and the adsorbent are both magnets, so that there is an attraction force between the valve core and the adsorbent; when the sealing cap seals the entrance of the air vent, the adsorption force of the adsorbent on the valve core is greater than the force of the spring on the valve core; when the sealing cap is against the bottom surface of the check plate, the adsorption force of the adsorbent on the valve core is less than the force of the spring on the valve core.

[0007] Furthermore, a tuyere is fixedly connected to the bottom inner portion of the valve body, and the adsorbent is fixedly connected to the top or middle portion of the tuyere.

[0008] Furthermore, a buffer gasket is arranged below the valve core.

[0009] Furthermore, the valve body is composed of an upper cover, a lower cover, a cover plate and an outer frame, the air inlet is arranged on the upper cover, the air outlet is arranged on the lower cover, and the coil is arranged on the outer frame.

[0010] Furthermore, the side wall of the anti-return plate is connected with a rib, the end of the rib is connected to an annular gasket, and the annular gasket is embedded between the upper cover and the lower cover. The annular gasket has a sealing function so that the upper cover and the lower cover are sealed and connected through the annular gasket.

[0011] Furthermore, at least one of the top surface and the bottom surface of the anti-return plate is a matte surface.

[0012] Furthermore, sound-absorbing cotton is arranged in the air vent.

[0013] Furthermore, an air leakage channel is formed between the lower cover and the cover plate, and the air leakage channel constitutes the air leakage port. The air leakage channel is a curved channel so that the axis lines of the inlet and outlet of the air leakage port are not on the same straight line.

[0014] Furthermore, the air leakage channel is an annular channel surrounding the valve core.

[0015] Furthermore, the valve body is provided with a slideway, the valve core, the adsorbent body, the buffer gasket and the air nozzle are all connected to the slideway, and the peripheral side walls of the valve core and the air nozzle have racks arranged along their axial direction, and the racks are in contact with the inner side walls of the slideway.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This solenoid valve only needs to be powered when switching states. Its state is maintained by an adsorbent or a spring, and no electric energy is required, thereby achieving energy saving. The coil is powered on and then off for a short time, and the coil will not produce obvious temperature changes; 2. The check piece has a fool-proof design and is not easy to install incorrectly. The check piece automatically maintains pressure without the valve core pressing against it, and the check piece will not stick to the air inlet; 3. The inlet and outlet of the vent are not on the coaxial line, and silencer cotton is filled between them, so the venting is fast and silent.

[0017] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional diagram of a plurality of solenoid valves used in series in an embodiment of the present invention.

[0019] Figure 2 It is a schematic diagram of the assembly structure of an embodiment of the present invention.

[0020] Figure 3 Schematic diagram of the structure of the air intake state in an embodiment of the present invention.

[0021] Figure 4 Schematic diagram of the structure in the deflated state in an embodiment of the present invention.

[0022] Figure 5 Schematic diagram of the structure of the pressure-maintaining state in an embodiment of the present invention.

[0023] Figure 6 Schematic diagram of the structure of the anti-reversal plate in an embodiment of the present invention.

[0024] In the figure: 1-valve body, 11-inlet pipe, 12-upper cover, 13-lower cover, 14-cover plate, 15-outer frame, 16-coil, 17-inlet port, 18-outlet port, 19-vent port, 2-valve core, 21-spring, 22-sealing cap, 3-air nozzle, 31-magnet, 32-buffer gasket, 4-check plate, 41-rib, 42-ring gasket, 5-silencer cotton. DETAILED DESCRIPTION

[0025] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0026] An energy-saving bistable pressure-maintaining solenoid valve, such as Figure 2 As shown, it includes: a valve body 1, a check plate 4, a valve core 2, a spring 21, an adsorbent and a nozzle 3. Figure 1As shown, multiple solenoid valves are used in series, and these solenoid valves share the same air intake pipe 11. In this embodiment, the adsorbent is a magnet 31, and the valve core is made of magnetic material; of course, the adsorbent can also be designed to be made of magnetic material, and the valve core is a magnet; or even the magnet is eliminated, and the magnet is directly made into a nozzle, and the nozzle directly generates an adsorption force (i.e., magnetic attraction) on the valve core.

[0027] The valve body 1 is composed of an upper cover 12, a lower cover 13, a cover plate 14 and an outer frame 15. The valve body 1 has an air inlet 17, an air outlet 18 and a vent 19 which are connected to each other. The vent 19 is provided with a sound-absorbing cotton 5. The air inlet 17 is provided at the upper cover 12, the air outlet 18 is provided at the lower cover 13, and a coil 16 for driving the valve core 2 to move is provided in the outer frame 15. A vent channel is formed between the lower cover 13 and the cover plate 14, and the vent channel forms the vent 19. The vent channel is a curved channel so that the axis lines of the inlet and outlet of the vent 19 are not in the same straight line, so that the released gas must flow through the sound-absorbing cotton 5 to reduce noise. The width of the vent channel is 0.2-0.5mm.

[0028] In this embodiment, the air leakage channel is an annular channel surrounding the core.

[0029] The side wall of the anti-return plate 4 is connected with a rib 41, and the end of the rib 41 is connected to an annular gasket 42. The annular gasket 42 is embedded between the upper cover 12 and the lower cover 13. The annular gasket 42 has a sealing function so that the upper cover 12 and the lower cover 13 are sealed and connected through the annular gasket 42; in this embodiment, Figure 6 As shown, two check plates on two solenoid valves are connected together.

[0030] The top surface of the check piece 4 is a mirror surface, and the bottom surface is a matte surface. The mirror surface has a good sealing effect, and the matte surface has an anti-sticking effect. The check piece has an anti-fool structure to prevent installation errors; the top surface of the check piece is used to seal the outlet of the air inlet.

[0031] The valve core 2 is movably connected to the valve body, and a sealing cap 22 is fixedly connected to the top of the valve core 2. The valve core 2 drives the sealing cap 22 to move between the bottom surface of the check plate 4 and the entrance of the air vent 19. The bottom surface of the sealing cap 22 is used to seal the entrance of the air vent 19.

[0032] The air nozzle 3 is fixedly connected to the bottom of the valve body 1 (directly below the valve core), and the magnet 31 is fixedly connected to the top of the air nozzle 3 (of course, the magnet can also be set at other positions, as long as the magnet can generate a downward magnetic attraction on the valve core). A buffer gasket 32 ​​is set on the top surface of the magnet 31. The buffer gasket 32 ​​separates the direct contact between the valve core 2 and the magnet 31. First, it prevents the valve core from directly hitting the magnet, and second, it facilitates the valve core to separate from the magnet.

[0033] The spring 21 is sleeved on the side wall of the valve core 2, and the spring 21 is used to drive the valve core 2 to move upward so that the sealing cap 22 presses against the bottom surface of the check plate 4. Of course, the spring can also be installed in other ways, such as being set below the valve core, or being set on the upper side of the valve core to pull it up. This embodiment adopts the method of sleeve-mounting the spring on the valve core.

[0034] When the sealing cap 22 seals the entrance of the air vent 19, the magnetic attraction force of the magnet 31 on the valve core 2 is greater than the force of the spring 21 on the valve core 2, that is, in the absence of external force, the sealing cap 22 maintains a sealed state with respect to the air vent 19 by the magnetic attraction force of the magnet 31; when the sealing cap 22 presses against the bottom surface of the check plate 4, the magnetic attraction force of the magnet 31 on the valve core 2 is less than the force of the spring 21 on the valve core 2, that is, in the absence of external force, the sealing cap 22 maintains a sealed state with respect to the air inlet 17 by the force of the spring 21.

[0035] In this embodiment, the valve body 1 has a slideway (the slideway is located in the outer frame), the valve core, magnet, buffer gasket and air nozzle are all connected to the slideway, and the peripheral side walls of the valve core and the air nozzle have racks arranged along their axial direction, and the racks fit the inner side walls of the slideway. The design of the rack is to facilitate the smooth movement of the valve core without shaking, and to ensure the exhaust of the valve core when it moves.

[0036] In this embodiment, the sealing cap 22 is a rubber cap.

[0037] In this embodiment, the magnet 31 is a neodymium iron boron permanent magnet.

[0038] This device has the following three working states: 1. Air intake: Figure 3 As shown, the direction of the arrow is the direction of gas flow. The solenoid valve passes a positive pulse of 0.03 to 0.1 seconds. The coil drives the valve core to move downward until it contacts the buffer gasket and is then adsorbed by the magnet. The sealing cap seals the air leak port due to the downward movement of the valve core. Air enters the air inlet, and the check plate is pushed open by the inflow of gas to create a gap. The air inlet is connected to the air outlet, and the gas reaches the container through the air outlet.

[0039] 2. Discouragement: Figure 4 As shown, the direction of the arrow is the direction of gas flow. The solenoid valve passes a negative pulse of 0.03 to 0.1 seconds. The coil generates a repulsive force to move the valve core upward and away from the buffer gasket, and then is pushed upward by the spring to make the sealing cap press against the bottom of the check plate to seal the outlet of the air inlet. The air outlet and the air vent are connected, and the gas passes through the air outlet in the container and then is released through the air vent.

[0040] 3. Maintain pressure: Figure 5As shown, the arrow direction is the gas flow direction. The solenoid valve passes a positive pulse of 0.03 to 0.1 seconds. The coil drives the valve core to move downward until it contacts the buffer gasket and is then adsorbed by the magnet. The sealing cap seals the air leakage port due to the downward movement of the valve core. The gas enters the container from the air inlet. After the container is full, the gas in the container will react with thrust to seal the check plate and the air inlet outlet, thereby realizing the function of non-electricity pressure maintenance.

[0041] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief 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 technical solution of the present invention.

Claims

1. An energy-saving bistable pressure-maintaining solenoid valve, characterized in that: include: A valve body, wherein the valve body has an air inlet, an air outlet and an air release port that are interconnected; A check plate, the top surface of which is used to seal the air inlet; A valve core, the valve core is movably connected to the valve body, a sealing cap is fixedly connected to the top of the valve core, a coil for driving the valve core to move is arranged in the valve body, the valve core drives the sealing cap to move between the bottom surface of the check plate and the entrance of the air vent, and the bottom surface of the sealing cap is used to seal the entrance of the air vent; A spring, the spring being used to drive the valve core to move upward so that the sealing cap presses against the bottom surface of the check plate; An adsorbent, the adsorbent is fixedly connected to the valve body, one of the valve core and the adsorbent is a magnet, the other is made of a magnetic material, or the valve core and the adsorbent are both magnets, so that there is an attraction force between the valve core and the adsorbent; when the sealing cap seals the entrance of the air leakage port, the adsorption force of the adsorbent on the valve core is greater than the force of the spring on the valve core; When the sealing cap presses against the bottom surface of the check plate, the adsorption force of the adsorption body on the valve core is smaller than the force of the spring on the valve core.

2. The energy-saving bistable pressure-maintaining solenoid valve according to claim 1, characterized in that: The bottom of the valve body is fixedly connected with a tuyere, and the adsorbent is fixedly connected to the top or middle of the tuyere.

3. The energy-saving bistable pressure-maintaining solenoid valve according to claim 2, characterized in that: A buffer gasket is arranged below the valve core.

4. The energy-saving bistable pressure-maintaining solenoid valve according to claim 1, characterized in that: The valve body is composed of an upper cover, a lower cover, a cover plate and an outer frame. The air inlet is arranged on the upper cover, the air outlet is arranged on the lower cover, and the coil is arranged on the outer frame.

5. The energy-saving bistable pressure-maintaining solenoid valve according to claim 4, characterized in that: The side wall of the anti-return plate is connected with a rib, the end of the rib is connected to an annular gasket, and the annular gasket is embedded between the upper cover and the lower cover. The annular gasket has a sealing function so that the upper cover and the lower cover are sealed and connected through the annular gasket.

6. The energy-saving bistable pressure-maintaining solenoid valve according to claim 1, characterized in that: At least one of the top surface and the bottom surface of the anti-return plate is a matte surface.

7. The energy-saving bistable pressure-maintaining solenoid valve according to claim 4, characterized in that: The air vent is provided with sound-absorbing cotton.

8. The energy-saving bistable pressure-maintaining solenoid valve according to claim 7, characterized in that: An air leakage channel is formed between the lower cover and the cover plate, and the air leakage channel constitutes the air leakage port. The air leakage channel is a curved channel so that the axis lines of the inlet and outlet of the air leakage port are not on the same straight line.

9. The energy-saving bistable pressure-maintaining solenoid valve according to claim 8, characterized in that: The air leakage channel is an annular channel surrounding the valve core.

10. The energy-saving bistable pressure-maintaining solenoid valve according to claim 3, characterized in that: The valve body is provided with a slideway, the valve core, the adsorbent, the buffer gasket and the air nozzle are all connected in the slideway, the valve core and the peripheral side walls of the air nozzle are provided with racks arranged along their axial direction, and the racks are in contact with the inner side walls of the slideway.

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