Three-position five-way middle-discharge high-pressure electromagnetic valve

Abstract

The three-position five-way middle-discharging high-pressure electromagnetic valve comprises a valve body, two ventilation structures which are communicated with each other are arranged in the valve body, and valve element assemblies are installed in the ventilation structures; the ventilation structure comprises an air inlet cavity, a working cavity and an exhaust cavity, and the size of the air inlet cavity is smaller than that of the exhaust cavity; the air inlet cavity and the exhaust cavity are communicated through the working cavity, the valve element assembly comprises a first piston, a second piston and a push rod, and the size of the first piston is smaller than that of the second piston; the first piston and the second piston are installed in the air inlet cavity and the exhaust cavity respectively, the push rod is installed in the working cavity, and the two ends of the push rod are connected with the first piston and the second piston respectively. The device has the beneficial effects that the device is provided with a cut-off structure with the upper cavity and the lower cavity, the starting speed is high, the pressure bearing capacity is high, the requirement of a high-pressure and large-flow environment can be met, the push rod serves as an independent part and is flexibly connected with the pistons on the two sides, the production cost can be greatly reduced, and the product percent of pass is increased.

Description

Technical Field

[0001] This application relates to the field of solenoid valve technology, and in particular to a three-position five-way high-pressure solenoid valve for central drainage. Background Technology

[0002] Solenoid valves are actuators that automatically control the direction and speed of fluids and are widely used in the mechanical field. Under normal circumstances, a two-position three-way solenoid valve is sufficient for accurate fluid control; however, when the fluid flow rate or pressure is high, a three-way solenoid valve cannot reliably control the fluid. Therefore, a three-position five-way solenoid valve can be used to further improve the fluid control effect.

[0003] Currently, most three-position five-way solenoid valves have a single-chamber shut-off structure. When the air pressure at one end is high, a higher air pressure is required at the other end to activate the valve, thus increasing the pilot start pressure. Furthermore, the valve body structure is mostly of the sliding spool type, with the first sealing ring and valve body being dynamic seals. This limits the flow area and pilot start pressure, making the solenoid valves generally suitable for pressures between 0.1 MPa and 0.8 MPa. Existing three-position five-way valve cores are manufactured as a single piece, belonging to the long-shaft category. This places high demands on the concentricity and roundness of the valve core and valve body, requiring higher manufacturing processes and technical expertise, and making quality assurance difficult. Utility Model Content

[0004] One objective of this application is to provide a three-position five-way high-pressure solenoid valve that can solve at least one of the defects in the above-mentioned background art.

[0005] To achieve at least one of the above objectives, the technical solution adopted in this application is as follows: a three-position five-way high-pressure solenoid valve, comprising a valve body, wherein two mutually communicating venting structures are provided within the valve body, and a valve core assembly is installed within each venting structure; the venting structure includes an inlet chamber, a working chamber, and an exhaust chamber, the size of which is smaller than the size of which is smaller than the size of which is smaller; the inlet chamber and the exhaust chamber are connected through the working chamber; the valve core assembly includes a first piston, a second piston, and a push rod, the size of which is smaller than the size of which is smaller than the size of which is smaller; the first piston and the second piston are respectively installed in the inlet chamber and the exhaust chamber, and the push rod is installed in the working chamber, with both ends of the push rod connected to the first piston and the second piston, respectively. Through the above configuration, this application has a dual-chamber shut-off structure, which can meet the application scenarios of high pressure and high flow rate; the different sizes of the inlet chamber and the exhaust chamber also make the size of the second piston larger than that of the first piston; this reduces the pilot start-up pressure and ensures that the device can start quickly.

[0006] Preferably, the push rod is softly connected to the first piston and the second piston via a connector. This configuration effectively reduces the manufacturing difficulty of the device, designing the push rod as an independent part and softly connecting it to the first and second pistons. This ensures that the device can still be used normally even if there are deviations in its manufacturing accuracy, thereby significantly reducing production costs and improving the product qualification rate.

[0007] Preferably, a sealing gasket is installed on one end of the first piston and the second piston near the working chamber. The sealing gasket is fixed by the connector and is used to seal the working chamber. This configuration allows the user to replace the sealing gasket via the connector, reducing the difficulty of gasket replacement.

[0008] Preferably, a first sealing ring is installed around the periphery of both the first and second pistons. This arrangement separates the gas at both ends of the first and second pistons, ensuring that all the gas can act on either the first or second piston.

[0009] Preferably, the valve body is provided with an air inlet, a working hole, and an exhaust hole. The air inlet communicates with the air inlet chamber, the working hole communicates with the working chamber, and the exhaust hole communicates with the exhaust chamber. With this configuration, when the first piston opens, gas can enter both the air inlet chamber and the working chamber through the air inlet in one go; when the second piston opens, gas in the working chamber can enter the exhaust chamber and finally be discharged to the outside through the exhaust hole.

[0010] Preferably, there is one air inlet, located between two air inlets, which communicates with both exhaust chambers simultaneously through a through-hole within the valve body; there are two working holes, each communicating with its corresponding working chamber; and there are two exhaust holes, each communicating with its corresponding exhaust chamber. With this configuration, gas can enter the air inlet chamber through the air inlet. When the first piston rod opens, the gas can enter the working chamber and exit the valve body through the working hole; when the second piston opens, the gas in the working chamber can enter the exhaust chamber and exit the valve body through the exhaust hole.

[0011] Preferably, a front cover is sealed to the top of the valve body, and a rear cover is sealed to the bottom of the valve body. The first piston is elastically connected to the rear cover via a first elastic element, and the second piston is elastically connected to the front cover via a second elastic element. This configuration allows the first and second elastic elements to define the initial positions of the first and second pistons, respectively. When the coil is energized, either the first or second piston can move against the elastic force of the elastic element. When the coil is de-energized, the first and second pistons return to their initial positions under the elastic force of the elastic element.

[0012] Preferably, the rear cover has a first mounting portion, and the front cover has a second mounting portion. Second sealing rings are mounted around the periphery of both the first and second mounting portions. The first mounting portion extends into the intake chamber and is sealed by the second sealing ring, while the second mounting portion extends into the exhaust chamber and is sealed by the second sealing ring. This configuration allows the bottom cover and front cover to be sealed to the valve body via the second sealing rings, preventing gas in the intake and exhaust chambers from flowing to the outside through the seams.

[0013] Preferably, a pilot assembly and a coil are mounted on the front cover. The pilot assembly includes a pilot frame and a pilot core installed inside the pilot frame. The front cover has a channel through which the pilot frame communicates with the exhaust chamber. The coil is used to control the movement of the pilot core. With this configuration, the air pressure above the second piston can be changed by energizing the coil to drive the pilot assembly to move.

[0014] Preferably, a manual button is installed on the front cover, which is used to control the start and stop of the pilot assembly. This configuration allows for temporary control of the machine via the manual button in the event of a coil malfunction.

[0015] Compared with the prior art, the beneficial effects of this application are as follows:

[0016] The first piston in this device is smaller than the second piston, which reduces the pressure required for the second piston to move and increases the flow area of ​​the medium. The different sizes of the upper and lower chambers lower the starting pressure of the device and enhance its sensitivity. The dual-chamber design also allows this invention to be applied to working scenarios with higher pressures.

[0017] In this invention, the push rod is connected to the first and second pistons via a flexible connection, which greatly reduces the concentricity of the intake and exhaust chambers during machining. Even if there is a certain deviation in the positions of the intake and exhaust chambers, it can be adapted by adjusting the angle of the push rod, thereby significantly reducing production costs and improving product qualification rate. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the cross-sectional structure of the three-position five-way high-pressure solenoid valve for center drain in this application. Figure 1 .

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the three-position five-way high-pressure solenoid valve for center drain in this application. Figure 2 .

[0020] Figure 3 This is a front view of the three-position five-way high-pressure solenoid valve for center drain in this application.

[0021] Figure 4This is a side view of the three-position five-way center-discharge high-pressure solenoid valve in this application.

[0022] Figure 5 This is an exploded structural diagram of the three-position five-way high-pressure solenoid valve for center drain in this application.

[0023] In the diagram: 1. Valve body; 11. Inlet chamber; 12. Working chamber; 13. Exhaust chamber; 14. Through hole; 100. First piston; 101. First elastic element; 102. Second elastic element; 110. Inlet port; 120. Working hole; 130. Exhaust port; 2. Rear cover; 21. First mounting part; 200. Second piston; 3. Front cover; 31. Channel; 32. Manual button; 33. Second mounting part; 300. Push rod; 4. Pilot assembly; 41. Pilot frame; 42. Pilot core; 400. First sealing ring; 401. Second sealing ring; 5. Coil; 500. Sealing gasket; 600. Connector. Detailed Implementation

[0024] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. They should not be construed as limiting the specific protection scope of this application.

[0026] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0027] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0028] One aspect of this application provides a three-position five-way high-pressure solenoid valve, such as... Figure 1As shown, one preferred embodiment includes a valve body 1, with two interconnected venting structures inside. Each venting structure includes an inlet chamber 11, a working chamber 12, and an exhaust chamber 13. The size of the inlet chamber 11 is smaller than the size of the exhaust chamber 13. The inlet chamber 11 and the exhaust chamber 13 are connected through the working chamber 12 to ensure that gas within the valve body 1 can flow through all three chambers. To control the direction of gas flow, a reciprocating valve core assembly is installed within the venting structure. The valve core assembly includes a first piston 100, a second piston 200, and a push rod 300. The first piston 100 is installed in the inlet chamber 11, and the second piston 200 is installed in the exhaust chamber 13. The size and weight of the first piston 100 are smaller than those of the second piston 200 to reduce the pressure required for the second piston 200 to activate. The push rod 300 is installed in the working chamber 12, and its two ends are connected to the first piston 100 and the second piston 200, respectively, to ensure that the first piston 100 and the second piston 200 can move synchronously.

[0029] It should be noted that, in order to maintain the normal operation of the device, the distance between the first piston 100 and the second piston 200 in this application should be greater than the length of the working chamber 12, so as to ensure that the working chamber 12 can only be closed by one of the first piston 100 and the second piston 200.

[0030] It is understood that this device has a double-chamber shut-off structure, which can meet the needs of high-pressure and high-flow-rate applications. The weight of the first piston 100 and the second piston 200 can be adjusted according to the actual air pressure. In some embodiments of this application, the size of the first piston 100 is set to be smaller than that of the second piston 200. When the device is started, the second piston 200 can use its own weight to press down on the first piston 100 and drive the first piston 100 to move synchronously, effectively improving the machine's start-up speed.

[0031] It should be noted that the valve core in traditional solenoid valves is usually an integrated structure, belonging to the long shaft type of parts. This requires a very high degree of matching in the concentricity and roundness of the valve core and valve body 1, resulting in higher requirements for production processes and technology during processing. In mass production, the quality of solenoid valves is difficult to guarantee.

[0032] To address the aforementioned problems, in some embodiments of this application, such as... Figure 1 and Figure 2 As shown, both the first piston 100 and the second piston 200 are equipped with a connector 600, which is flexibly connected to the push rod 300. When there is a certain deviation between the positions of the intake chamber 11 and the exhaust chamber 13, the angle of the push rod 300 can be adjusted appropriately to ensure that both the first piston 100 and the second piston 200 can seal the working chamber 12.

[0033] Understandably, the flexible connection between the connector 600 and the push rod 300 allows the device to still function normally even when there are deviations in its machining accuracy, thereby significantly reducing production costs and improving the product qualification rate.

[0034] In this embodiment, as Figure 1 As shown, a sealing gasket 500 is installed on one end of the first piston 100 and the second piston 200 near the working chamber 12. The sealing gasket 500 is fixed by a connector 600. When the first piston 100 or the second piston 200 approaches the working chamber 12, the corresponding sealing gasket 500 presses against the end wall of the working chamber 12 to seal it. When the sealing gasket 500 is damaged, the user can replace it by disassembling the connector 600.

[0035] Specifically, such as Figure 1 and Figure 2 As shown, a first sealing ring 400 is installed on the periphery of the first piston 100 and the second piston 200 so that the gas at both ends of the first piston 100 and the second piston 200 will not interfere with each other through the gap, thereby ensuring that the gas can act on the first piston 100 or the second piston 200.

[0036] In this embodiment, as Figure 2 As shown, the valve body 1 is provided with an air inlet 110, a working hole 120, and an exhaust hole 130; wherein, the air inlet 110 is connected to the air inlet chamber 11, the working hole 120 is connected to the working chamber 12, and the exhaust hole 130 is connected to the exhaust chamber 13. When the first piston 100 is opened, gas can enter the air inlet chamber 11 and the working chamber 12 sequentially through the air inlet 110; when the second piston 200 is opened, the gas in the working chamber 12 can enter the exhaust chamber 13 and finally be discharged to the outside through the exhaust hole 130.

[0037] Specifically, such as Figure 2 , Figure 3 and Figure 4 As shown, there is one air inlet 110, located between two air inlet chambers 11 and connected to both chambers 11 via a through hole 14 on the valve body 1. There are two working holes 120, each connected to a corresponding working chamber 12. When the first piston 100 in the same ventilation structure is open and the second piston 200 is closed, gas is discharged from the valve body 1 through the working hole 120. There are two exhaust holes 130, each connected to a corresponding exhaust chamber 13. When the first piston 100 in the same ventilation structure is closed and the second piston 200 is open, gas in the working chamber 12 is discharged from the valve body 1 through the exhaust hole 130.

[0038] Understandably, this application uses two ventilation structures to control the direction of gas transmission, enabling the device to withstand greater gas pressure and further expanding the applicable scenarios of the solenoid valve.

[0039] In this embodiment, as Figure 1 As shown, a front cover 3 is installed on the top of the valve body 1, and a rear cover 2 is installed on the bottom of the valve body 1. The first piston 100 is elastically connected to the rear cover 2 through a first elastic element 101, which is used to define the initial position of the first piston 100. The second piston 200 is elastically connected to the front cover 3 through a second elastic element 102, which is used to define the initial position of the second piston 200. When the device is running, the first piston 100 or the second piston 200 moves against the spring force by the thrust of air pressure. When the device stops, the first piston 100 or the second piston 200 returns to its initial position under the extension and contraction force of the spring.

[0040] It should be noted that the size and elastic force of the first elastic element 101 and the second elastic element 102 can be adjusted according to the actual situation.

[0041] Specifically, such as Figure 1 and Figure 2 As shown, to improve the sealing effect of the front cover 3 and the rear cover 2, a first mounting part 21 is provided on the rear cover 2, and a second mounting part 33 is provided on the front cover 3. A second sealing ring 401 is installed around the first mounting part 21 and the second mounting part 33. The first mounting part 21 is inserted into the air intake chamber 11 and sealed by the second sealing ring 401, and the second mounting part 33 is inserted into the exhaust chamber 13 and sealed by the second sealing ring 401, thereby preventing gas in the air intake chamber 11 and the exhaust chamber 13 from flowing to the outside through the seam.

[0042] In this embodiment, as Figure 1 and Figure 5 As shown, two pilot assemblies 4 and two coils 5 are mounted on the front cover 3. The two pilot assemblies 4 are coaxially arranged with their respective second pistons 200. The pilot assembly 4 includes a pilot frame 41 and a pilot core 42 installed inside the pilot frame 41. A channel 31 is provided on the front cover 3, through which the pilot frame 41 communicates with the exhaust chamber 13. The coils 5 are used to control the up and down movement of the pilot core 42 to change the air pressure above the second piston 200.

[0043] Understandably, the working principle of this device is as follows: When the coil 5 is energized, the pilot iron core 42 moves downward and uses air pressure to drive the second piston 200 to block the working chamber 12. At this time, the gas can pass through the air inlet 110, sequentially through the air inlet chamber 11 and the working chamber 12, and finally exit the valve body 1 through the working hole 120. When the coil 5 is de-energized, the first piston 100 moves upward against the pressure difference under the elastic force of the first elastic element 101. The first piston 100 blocks the working chamber 12, and the gas in the working chamber 12 enters the exhaust chamber 13 and exits the valve body 1 through the exhaust hole 130 to maintain the air pressure balance in the valve body 1.

[0044] It should be noted that this device has two ventilation structures. When the two coils 5 are alternately energized, the gas in the air inlet 110 can be alternately discharged from the two working holes 120, ensuring that the device can alternately change the gas flow direction. When both coils 5 are de-energized, both working chambers 12 are blocked by the corresponding first pistons 100, preventing external gas from entering the working chambers 12, and the machine is in a stopped state. When both coils 5 are energized, both working chambers 12 are blocked by the corresponding second pistons 200, allowing external gas to enter the working chambers 12 simultaneously. At this time, the air pressure in the two working chambers 12 is the same, and the machine is in a locked state.

[0045] Understandably, in order to ensure the normal operation of the machine, when the coil 5 is not energized, the air pressure below the first piston 100 must be greater than the air pressure above the second piston 200, so as to ensure that the first piston 100 can seal the working chamber 12.

[0046] Furthermore, such as Figure 2 As shown, a manual button 32 is installed on the front cover 3. When the coil 5 burns out, the solenoid valve can be opened and closed by the manual button 32.

[0047] It should be noted that all metal parts in this application are made of materials with rust-resistant properties, such as stainless steel.

[0048] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A three-position five-way center-discharge high-pressure solenoid valve comprising a valve body (1), characterized in that, Two air passage structures are arranged in the valve body (1) and communicated with each other, and a valve core assembly is arranged in the air passage structures; the air passage structures comprise an air inlet cavity (11), a working cavity (12) and an air outlet cavity (13), the size of the air inlet cavity (11) is smaller than that of the air outlet cavity (13); the air inlet cavity (11) and the air outlet cavity (13) are communicated through the working cavity (12), the valve core assembly comprises a first piston (100), a second piston (200) and a push rod (300), the size of the first piston (100) is smaller than that of the second piston (200); the first piston (100) and the second piston (200) are arranged in the air inlet cavity (11) and the air outlet cavity (13) respectively, and the push rod (300) is arranged in the working cavity (12), and two ends of the push rod (300) are connected with the first piston (100) and the second piston (200) respectively.

2. The three-position five-way center outlet high pressure solenoid valve according to claim 1, wherein The first piston (100) and the second piston (200) are provided with a connecting piece (600), and the connecting piece (600) is connected with the push rod (300) in a flexible manner.

3. The three-position five-way center outlet high pressure solenoid valve according to claim 1 or 2, wherein The first piston (100) and the second piston (200) are provided with a sealing gasket (500) at one end close to the working cavity (12), the sealing gasket (500) is fixed through the connecting piece (600), and the sealing gasket (500) is used for sealing the working cavity (12).

4. The three-position five-way center outlet high pressure solenoid valve according to claim 1, wherein The first piston (100) and the second piston (200) are provided with a first sealing ring (400) on the circumferential side.

5. The three-position five-way center outlet high pressure solenoid valve according to claim 1, wherein The valve body (1) is provided with an air inlet hole (110), a working hole (120) and an air outlet hole (130); the air inlet hole (110) is communicated with the air inlet cavity (11), the working hole (120) is communicated with the working cavity (12), and the air outlet hole (130) is communicated with the air outlet cavity (13).

6. The three-position five-way center outlet high pressure solenoid valve according to claim 5, wherein The number of the air inlet hole (110) is one, the air inlet hole (110) is located between the two air inlet cavities (11), and the air inlet hole (110) is communicated with the two air outlet cavities (13) through the through hole (14) arranged in the valve body (1); the number of the working hole (120) is two, and the working hole (120) is communicated with the corresponding working cavity (12) respectively; the number of the air outlet hole (130) is two, and the air outlet hole (130) is communicated with the corresponding air outlet cavity (13) respectively.

7. The three-position five-way center outlet high pressure solenoid valve according to claim 1, wherein The top of the valve body (1) is provided with a front cover (3), and the bottom of the valve body (1) is provided with a rear cover (2); the first piston (100) is elastically connected with the rear cover (2) through a first elastic member (101), and the second piston (200) is elastically connected with the front cover (3) through a second elastic member (102).

8. The three-position five-way center outlet high pressure solenoid valve according to claim 7, wherein A first mounting portion (21) is arranged on the rear cover (2), a second mounting portion (33) is arranged on the front cover (3), and a second sealing ring (401) is mounted on the periphery of the first mounting portion (21) and the second mounting portion (33); the first mounting portion (21) extends into the air inlet cavity (11) and is sealed by the second sealing ring (401), and the second mounting portion (33) extends into the air outlet cavity (13) and is sealed by the second sealing ring (401).

9. The three-position five-way center outlet high pressure solenoid valve according to claim 1 or 8, wherein A pilot assembly (4) and a coil (5) are mounted on the front cover (3), the pilot assembly (4) comprises a pilot frame (41) and a pilot core (42) mounted in the pilot frame (41); a passage (31) is arranged on the front cover (3), the pilot frame (41) is in communication with the air outlet cavity (13) through the passage (31); and the coil (5) is used for controlling the movement of the pilot core (42).

10. The three-position five-way center outlet high pressure solenoid valve according to claim 9, wherein A manual button (32) is mounted on the front cover (3), and the manual button (32) is used for controlling the start and stop of the pilot assembly (4).

Images