Pneumatic control electromagnetic valve

Abstract

The utility model relates to a pneumatic control solenoid valve, which comprises a valve body, a coil shell, an end cover, a push rod, a static iron core, a movable iron core and a circuit board, a coil framework is crimped on the outer wall of the static iron core, the movable iron core is arranged on the lower side of the static iron core, a coil is wound on the outer wall of the coil framework, and an iron support is crimped between the coil framework and the coil shell. A circuit board is arranged at one end of the coil shell in a pressing mode through a circuit board protection shell, the bottom end of the valve body is fixedly connected with an end cover, a first ventilation opening, a second ventilation opening and a third ventilation opening which are communicated are sequentially formed in the side wall of the valve body from top to bottom, a reset button is further arranged, and the first ventilation opening, the second ventilation opening and the third ventilation opening are communicated through a push rod. A movable iron core rubber seat is fixedly connected between the top end of the push rod and the movable iron core, and the top end of the valve body is fixedly connected with the coil shell. The pneumatic control electromagnetic valve has the advantages that the size is reduced, abrasion is reduced, and the structure is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves, in particular to a gas-controlled electromagnetic valve. Background Art

[0002] As a type of solenoid valve, the pneumatic solenoid valve controls the opening and closing of the gas circuit through electromagnetics. It has the advantages of fast response speed and high control accuracy, and is widely used in mechatronic products. The invention patent with publication number CN115370792A discloses a direct-acting solenoid valve structure, which is divided into two parts: a valve body assembly and an electromagnetic assembly, which are fixedly connected by screws. The valve body assembly consists of a valve body, a valve stem, a reset button, a valve stem spring, and a valve seat. The valve stem and the valve seat are provided with sealing grooves, and the passages between different vents are closed by adding seals. The electromagnetic assembly includes a housing, a circuit board assembly, a skeleton, an iron bracket, a coil, a static iron core, a moving iron core, a moving iron core spring, and a coil cover.

[0003] After analysis, it was found that this type of solenoid valve has the following defects: First, the screw connection takes up too much space, resulting in a larger volume; second, the valve stem, valve seat and other parts have multiple sealing grooves, vents, etc., which makes the processing technology complicated; third, the contact area of ​​the moving iron core is too large and the wear is relatively serious; fourth, there are too many parts and the structural design is redundant.

[0004] For this reason, we have developed a gas-controlled solenoid valve to solve the above problems. Utility Model Content

[0005] The utility model aims to overcome the deficiencies of the prior art and to provide a gas-controlled solenoid valve, which has the advantages of reduced volume, reduced wear, simplified structure, etc.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an air-controlled solenoid valve, including a valve body, a coil housing, an end cover, a push rod, a static iron core, a moving iron core and a circuit board, the outer wall of the static iron core is crimped with a coil frame, and the moving iron core is provided on the lower side, the outer wall of the coil frame is wrapped with a coil, an iron bracket is crimped between the coil frame and the coil housing, one end of the coil housing is pressed with the circuit board through a circuit board protective housing, the bottom end of the valve body is fixedly connected to an end cover, the side walls of the valve body are sequentially provided with a first air vent, a second air vent and a third air vent that are connected from top to bottom, and a reset button is also provided, the first air vent, the second air vent and the third vent are connected through the push rod, a moving iron core rubber seat is fixedly connected between the top end of the push rod and the moving iron core, and the top end of the valve body is fixedly connected to the coil housing.

[0007] Preferably, an inner end surface of the coil frame is provided on the inner wall thereof, and the inner end surface of the frame abuts against the static iron core.

[0008] Preferably, a first sealing opening is formed at the top end of the push rod, and a push rod rubber seat is provided at the bottom end, and the push rod rubber seat is movably abutted against a second sealing opening.

[0009] Preferably, a first end face sealing ring is crimped between the top end of the coil skeleton and the iron bracket, and the bottom end abuts against a magnetic conductive plate through a second end face sealing ring.

[0010] Preferably, the moving iron core is sleeved with a spring seat, the spring seat is sleeved with a moving iron core spring, and the moving iron core spring is crimped to the magnetic conductive plate.

[0011] Preferably, a magnetic conductive plate sealing ring is sleeved on the top end of the valve body, and the magnetic conductive plate is crimped with the magnetic conductive plate sealing ring.

[0012] Preferably, the inner wall of the valve body is provided with a step surface, and the step surface abuts against the push rod.

[0013] Preferably, a plug hole is provided at one end of the top of the valve body, a plug pin is plugged into the plug hole, and the reset button is plugged into the valve body through the plug pin.

[0014] Preferably, a reset button spring is provided at one end of the reset button, and a reset button sealing ring is sleeved on the outer wall, and the reset button sealing ring is sealed and connected to the valve body.

[0015] Preferably, an end cover sealing ring is sleeved on the bottom end of the valve body, a push rod spring is sleeved on the push rod rubber seat, the push rod spring abuts against the valve body, and the end cover sealing ring is sealed and connected to the valve body.

[0016] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0017] The pneumatic solenoid valve of the utility model has a compact valve body structure, which improves space utilization; the sealing port cooperates with the rubber seat of the moving iron core and the rubber seat of the push rod to realize opening and closing between different passages, reduce the volume of the valve body, and improve the operation reliability; the step surface is used to support the push rod and limit the radial movement of the push rod, reducing the wear between the push rod and the valve body; the push rod structure is simplified, the difficulty of the processing technology is reduced, and the operation resistance is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the air-controlled solenoid valve of the utility model.

[0019] Figure 2 It is a schematic diagram of the internal structure of the valve body of the utility model.

[0020] Figure 3It is a top view of the valve body of the utility model. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] Figures 1 to 3 In the invention, a pneumatic solenoid valve includes a valve body 101, a coil housing 201, an end cover 102, a push rod 105, a static iron core 207, a moving iron core 208 and a circuit board 202. The outer wall of the static iron core 207 is pressed with a coil frame 205, and the lower side is provided with a moving iron core 208. The outer wall of the coil frame 205 is wound with a coil 206. An iron bracket 204 is pressed between the coil frame 205 and the coil housing 201. One end of the coil housing 201 is pressed with a circuit board 202 through a circuit board protective housing 203. The bottom end of the valve body 101 is fixedly connected to an end cover 102, and the side wall of the valve body 101 is provided with a first air vent 1011, a second air vent 1012 and a third air vent 1013 which are connected in sequence from top to bottom, and a reset button 106 is also provided. The first air vent 1011, the second air vent 1012 and the third air vent 1013 are connected through a push rod 105, and a moving iron core rubber seat 210 is fixedly connected between the top end of the push rod 105 and the moving iron core 208, and the top end of the valve body 101 is fixedly connected to the coil housing 201.

[0023] A first sealing opening 1017 is formed at the top of the push rod 105 , and a push rod rubber seat 104 is formed at the bottom of the push rod 105 . The push rod rubber seat 104 is movably connected to a second sealing opening 1018 .

[0024] An inner end surface 2053 is provided on the inner wall of the coil frame 205 , and the inner end surface 2053 abuts against the static iron core 207 .

[0025] A first end face sealing ring 2051 is crimped between the top of the coil frame 205 and the iron support 204, and the bottom end abuts against a magnetic plate 209 through a second end face sealing ring 2052. The moving iron core 208 is sleeved with a spring seat 212, and the spring seat 212 is sleeved with a moving iron core spring 211, and the moving iron core spring 211 is crimped with the magnetic plate 209.

[0026] A magnetic plate sealing ring 2091 is sleeved at the top of the valve body 101, and a step surface 10110 is provided on the inner wall of the valve body 101. The magnetic plate 209 is crimped with the magnetic plate sealing ring 2091. The step surface 10110 is in contact with the push rod 105. A plug hole 1019 is provided at one end of the top of the valve body 101, and a plug pin 1063 is plugged into the plug hole 1019. The reset button 106 is plugged into the valve body 101 through the plug pin 1063. A reset button spring 1062 is provided at one end of the reset button 106, and a reset button sealing ring 1061 is sleeved on the outer wall. The reset button sealing ring 1061 is sealed and connected to the valve body 101.

[0027] Two step surfaces 10110 are provided in the chamber of the valve body 101 for supporting the push rod 105 and limiting its radial movement, thereby reducing the friction loss between the valve body 101 and the push rod 105 .

[0028] An end cover sealing ring 1021 is sleeved on the bottom end of the valve body 101 , a push rod spring 103 is sleeved on the push rod rubber seat 104 , the push rod spring 103 abuts against the valve body 101 , and the end cover sealing ring 1021 is sealed and connected to the valve body 101 .

[0029] The valve body assembly includes a valve body 101, an end cover 102, a push rod spring 103, a push rod rubber seat 104, a push rod 105, a reset button 106, and a valve port rubber ring 107; a first chamber 1014, a second chamber 1015 and a third chamber 1016 are provided inside the valve body 101, the end cover 102 is fixedly connected to the valve body 101, the end cover 102 is placed outside the second chamber 1015, the push rod 105 is slidably arranged in the second chamber 1015, one end of the push rod 105 is provided with a push rod rubber seat 104, and the other end abuts against the moving iron core 208, one end of the push rod spring 103 abuts against the push rod rubber seat 104, and the other end abuts against the end cover 102, for realizing axial movement of the push rod rubber seat 104 and the push rod 105; the reset button 106 is slidably arranged in the third chamber 1016, and the valve port rubber ring 107 is placed in the groove at the bottom of the valve body 101.

[0030] A first air vent 1011, a second air vent 1012 and a third air vent 1013 are provided at the bottom of the valve body 101, a first sealing port 1017 is provided in the first chamber 1014, and a second sealing port 1018 is provided in the second chamber 1015; an end cover sealing ring 1021 is provided on the outer side of the first chamber 1014, and the first chamber 1014 abuts against the end cover 102 to achieve sealing between the third air vent 1013 and the second sealing port 1018; a reset button sealing ring 1061 is sleeved on the reset button 106 to achieve sealing between the reset button 106 and the first sealing port 1017, a reset button spring 1062 is provided in the reset button 106 to achieve automatic resetting between the reset button 106 and the valve body 101, and a latch 1063 is placed in the insertion hole 1019 to limit the reset button 106 in the valve body 101.

[0031] The electromagnetic assembly includes a coil housing 201, a circuit board 202, a circuit board protective housing 203, an iron bracket 204, a coil skeleton 205, a coil 206, a static iron core 207, a moving iron core 208, a magnetic conductive plate 209, a moving iron core rubber seat 210, a moving iron core spring 211, and a spring seat 212; the coil housing 201 is sleeved on the outside of the iron bracket 204, the circuit board 202 is placed on the outside of the coil housing 201, and the circuit board protective housing 203 is fixed on the coil housing. The coil skeleton 205 is fixed inside the iron bracket 204, the coil 206 is wound on the coil skeleton 205, the static iron core 207 is fixed in the chamber of the coil skeleton 205, one end of the static iron core 207 abuts against the iron bracket 204, and the other end abuts against the inner end face 2053 of the skeleton, and the end face of the coil skeleton 205 is provided with a first end face sealing ring 2051, and the first end face sealing ring 2051 abuts against the iron bracket 204, so as to realize the coil skeleton 20 5 The sealing between the chamber and the iron support 204, the other side end face of the coil skeleton 205 is provided with a second end face sealing ring 2052, the second end face sealing ring 2052 is in contact with the magnetic plate 209, and is used to achieve the sealing between the coil skeleton 205 and the magnetic plate 209, and one end of the magnetic plate 209 is provided with a magnetic plate sealing ring 2091, and the magnetic plate sealing ring 2091 is in contact with the valve body 101, and is used to seal between the magnetic plate 209 and the valve body 101; the moving iron core 208 is slidingly arranged In the chamber of the coil skeleton 205, the magnetic conductive plate 209 is fixed to one side of the coil housing 201 and abuts against the iron bracket 204, the moving iron core rubber seat 210 is arranged in the moving iron core 208, the spring seat 212 is sleeved on the moving iron core 208, the moving iron core spring 211 is sleeved on the spring seat 212, one end of the moving iron core spring 211 abuts against the spring seat 212, and the other end abuts against the magnetic conductive plate 209, which is used to realize the automatic reset between the moving iron core 208 and the valve body 101. When the coil is energized, the static iron core and the moving iron core are attracted, the valve stem moves under the action of the valve stem spring, and the second vent 1012 is connected to the third vent 1013; when the coil is de-energized, the moving iron core spring pushes the moving iron core and the valve stem to reset, and the first vent 1011 is connected to the second vent 1012.

[0032] The above are only specific application examples of the utility model, and do not constitute any limitation on the protection scope of the utility model. Any technical solution formed by equivalent transformation or equivalent replacement falls within the protection scope of the utility model.

Claims

1. A gas-controlled solenoid valve, characterized in that: The invention comprises a valve body (101), a coil housing (201), an end cover (102), a push rod (105), a static iron core (207), a moving iron core (208) and a circuit board (202); the outer wall of the static iron core (207) is pressed against a coil frame (205), and the moving iron core (208) is arranged on the lower side; a coil (206) is wound around the outer wall of the coil frame (205); an iron bracket (204) is pressed against the coil frame (205) and the coil housing (201); one end of the coil housing (201) is pressed against the circuit board (202) through a circuit board protective housing (203); the valve body (101 ) is fixedly connected to the end cover (102), the side wall of the valve body (101) is provided with a first vent (1011), a second vent (1012) and a third vent (1013) which are connected in sequence from top to bottom, and is also provided with a reset button (106), the first vent (1011), the second vent (1012) and the third vent (1013) are connected through the push rod (105), the top end of the push rod (105) and the moving iron core (208) are fixedly connected to a moving iron core rubber seat (210), and the top end of the valve body (101) is fixedly connected to the coil housing (201).

2. The air-controlled solenoid valve according to claim 1, characterized in that: An inner end surface (2053) of the coil frame (205) is provided on the inner wall thereof, and the inner end surface (2053) of the frame is in contact with the static iron core (207).

3. The air-controlled solenoid valve according to claim 2, characterized in that: A first sealing opening (1017) is formed at the top end of the push rod (105), and a push rod rubber seat (104) is provided at the bottom end. The push rod rubber seat (104) is movably connected to a second sealing opening (1018).

4. The air-controlled solenoid valve according to claim 1, characterized in that: A first end face sealing ring (2051) is crimped between the top end of the coil frame (205) and the iron support (204), and the bottom end abuts against a magnetic conductive plate (209) via a second end face sealing ring (2052).

5. The air-controlled solenoid valve according to claim 4, characterized in that: The moving iron core (208) is sleeved with a spring seat (212), the spring seat (212) is sleeved with a moving iron core spring (211), and the moving iron core spring (211) is crimped to the magnetic conductive plate (209).

6. The air-controlled solenoid valve according to claim 5, characterized in that: A magnetic conductive plate sealing ring (2091) is sleeved on the top end of the valve body (101), and the magnetic conductive plate (209) is crimped to the magnetic conductive plate sealing ring (2091).

7. The air-controlled solenoid valve according to claim 1, characterized in that: The inner wall of the valve body (101) is provided with a step surface (10110), and the step surface (10110) abuts against the push rod (105).

8. The air-controlled solenoid valve according to claim 1, characterized in that: A plug hole (1019) is provided at one end of the top of the valve body (101), and a plug pin (1063) is plugged into the plug hole (1019), and the reset button (106) is plugged into the valve body (101) via the plug pin (1063).

9. The air-controlled solenoid valve according to claim 8, characterized in that: A reset button spring (1062) is provided at one end of the reset button (106), and a reset button sealing ring (1061) is sleeved on the outer wall. The reset button sealing ring (1061) is sealed and connected to the valve body (101).

10. The air-controlled solenoid valve according to claim 3, characterized in that: An end cover sealing ring (1021) is sleeved on the bottom end of the valve body (101), a push rod spring (103) is sleeved on the push rod rubber seat (104), the push rod spring (103) is in contact with the valve body (101), and the end cover sealing ring (1021) is sealed and connected to the valve body (101).

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