Bottom connection type electromagnetic valve

Abstract

The utility model belongs to the technical field of electromagnetic valves, and discloses a bottom connection type electromagnetic valve which comprises a valve body and a pilot head installed on the valve body, the pilot head comprises a coil assembly installed on the valve body, a valve cavity is formed in the valve body, a valve element is arranged in the valve cavity in a sliding connection mode, the valve body is provided with an exhaust port, a working port and an air inlet, and the working port is connected with the valve element in a sliding mode. A coil assembly is arranged on the guide head, a lining is sleeved with the coil assembly, a first movable iron core is movably connected into the lining, a through hole located above the first movable iron core is formed in the guide head, and a static iron core is arranged below the first movable iron core. The second spring between the abutting plate and the lining pushes the abutting plate to be matched with the abutting part in the valve cavity, so that the effect of fixing the static iron core is achieved, installation is more convenient, the first movable iron core, the second movable iron core and the valve element can be manually pushed to move through the through holes, and the manual debugging function is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electromagnetic valves, in particular to a bottom-connected electromagnetic valve. Background Art

[0002] Solenoid valve is an industrial device controlled by electromagnetics. It is an automation basic component used to control fluids. It is a control component used to control actuators, not limited to hydraulic and pneumatic forms. It is used to adjust the direction, flow, speed and other parameters of the medium in industrial control systems. Its working principle is to control the mechanical movement of the valve core by controlling the current on and off of the electromagnet, thereby closing and starting different vents to achieve the purpose of controlling certain parameters of the fluid entering the mechanical element.

[0003] After searching, a Chinese utility model patent (authorization announcement number: CN 115183019 A) provides a two-position three-way direct-acting explosion-proof solenoid valve, including a valve body, an explosion-proof shell, a moving iron core and a static iron core, wherein the explosion-proof shell can be rotatably sleeved on the valve body and locked or unlocked by a locking structure; the moving iron core is arranged in the valve body for reciprocating movement along its own axial direction, and a valve core piece is arranged at the front end of the moving iron core, and a through center hole is opened inside the moving iron core along its own axial direction; the static iron core is installed on the valve body and extends into the explosion-proof shell, and is coaxially arranged with the moving iron core and located above the moving iron core.

[0004] The front end of the static iron core is connected to the valve body, and the rear end of the static iron core is sleeved with a coil part, which is located in the explosion-proof shell and connected to the explosion-proof shell through a mounting plate so that the coil part rotates synchronously with the explosion-proof shell, and a second elastic part is abutted between the static iron core and the moving iron core. Specifically, the front end of the static iron core and the rear end of the static iron core are welded and connected to form an integral structure, the front end of the static iron core is located in the first valve body section of the valve body, and is connected to the first valve body section through a thread, and a sealing ring is provided between the front end of the static iron core and the first valve body section to play a sealing role and provide conditions for the up and down movement of the moving iron core.

[0005] It can be seen from the prior art that, when the existing two-position three-way valve needs to be inspected and debugged, the solenoid valve is easily damaged due to long-term power-on, so it needs to be inspected and debugged manually. However, the prior art cannot realize the air path of the solenoid valve by manually pushing the moving iron core. Therefore, it can only be powered on for debugging during inspection and debugging. Therefore, debugging is not convenient enough, and the damage rate of the solenoid valve is high. In addition, it is time-consuming and labor-intensive to fix the static iron core with a nut, so this shortcoming needs to be improved urgently. Utility Model Content

[0006] The purpose of the utility model is to solve the above problems. The utility model provides a bottom-connected solenoid valve, which has the advantages that the state of the solenoid valve can be manually switched during manual debugging and the static iron core can be installed more quickly.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: comprising a valve body and a pilot head installed on the valve body, the pilot head comprising a coil assembly installed on the valve body, the valve body having a valve cavity, a valve core slidably connected in the valve cavity, the valve body having an exhaust port, a working port and an air inlet, a bushing provided in the coil assembly, a first moving iron core movably connected in the bushing, a through hole located above the first moving iron core provided on the pilot head, a static iron core provided below the first moving iron core, the static iron core provided in the bushing, a second moving iron core slidably connected in the static iron core The second moving iron core penetrates to the top of the static iron core, the lower end of the second moving iron core abuts against the upper end of the valve core, a first spring for resetting the valve core is abutted between the valve core and the bottom of the valve cavity, the first spring always has a tendency to push the valve core to move closer to the static iron core, an abutment plate is provided at the bottom of the static iron core, the abutment plate is located at the lower side of the bushing, and a second spring is abutted between the bushing and the abutment plate, the valve cavity has an abutment portion abutting with the lower end of the abutment plate, the second spring always has a tendency to push the abutment plate to move closer to the abutment portion.

[0008] Preferably, the exhaust port, the working port and the air inlet are located on the same side of the valve body.

[0009] Preferably, the valve cavity is provided with an upper valve port and a lower valve port, and a sealing ring is provided on the outer periphery of the middle portion of the valve core to seal with the upper valve port and the lower valve port, and when the sealing ring seals with the upper valve port, the air inlet is cut off from the working port, and the exhaust port is connected to the working port;

[0010] When the sealing ring is in sealing cooperation with the lower valve port, the air inlet is communicated with the working port, and the air outlet is cut off from the working port.

[0011] Preferably, a filter is provided in the air inlet.

[0012] Preferably, a piston is movably provided in the through hole, and the first moving iron core is brought into contact with the piston and then moves synchronously by manually pushing the piston.

[0013] Preferably, a Y-shaped ring is provided on the outer periphery of the piston and seals with the through hole.

[0014] Preferably, the valve core has a spring cavity therein, and the first spring is arranged in the spring cavity.

[0015] Preferably, a plurality of sealing rings are provided on the outer periphery of the valve core.

[0016] Preferably, the bushing comprises an upper bushing and a lower bushing respectively, the first moving iron core is movably disposed in the upper bushing, and the lower bushing is disposed on the outer periphery of the static iron core.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0018] The bottom-connected solenoid valve provided by the utility model achieves the function of fixing the static iron core by installing a static iron core in a bushing and providing an abutment plate on the static iron core, and pushing the abutment plate to cooperate with the abutment portion in the valve cavity through a second spring between the abutment plate and the bushing, thereby achieving the function of fixing the static iron core. The installation is more convenient, and the first moving iron core, the second moving iron core and the valve core can be manually pushed through the through hole to achieve the function of manual debugging. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model.

[0020] Description of the drawings: 1. Valve body; 10. Valve cavity; 100. Abutment part; 101. Upper valve port; 102. Lower valve port; 11. Exhaust port; 12. Working port; 13. Air inlet; 14. Filter; 2. Pilot head; 21. Spring cavity; 22. First spring; 23. Static iron core; 231. Abutment plate; 24. Second spring; 25. First moving iron core; 26. Second moving iron core; 27. Bushing; 28. Valve core; 30. Sealing ring; 31. Sealing ring; 32. Through hole; 33. Coil assembly; 41. Piston; 42. Y-ring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figure 1As shown, a bottom-connected solenoid valve comprises a valve body 1 and a pilot head 2 mounted on the valve body 1, the pilot head 2 comprises a coil assembly 33 mounted on the valve body 1, a valve cavity 10 is provided in the valve body 1, a valve core 28 is slidably connected in the valve cavity 10, the valve body 1 comprises an exhaust port 11, a working port 12 and an air inlet 13, the exhaust port 11, the working port 12 and the air inlet 13 are located on the same side of the valve body 1, a bushing 27 is sleeved in the coil assembly 33, a first moving iron core 25 is movably connected in the bushing 27, a through hole 32 is provided on the pilot head 2 and is located above the first moving iron core 25, a static iron core 23 is provided below the first moving iron core 25, the static iron core 23 is arranged in the bushing 27, and a first moving iron core 25 is slidably connected in the static iron core 23 A second moving iron core 26 is provided, and the second moving iron core 26 extends to the top of the static iron core 23. The lower end of the second moving iron core 26 abuts against the upper end of the valve core 28. A first spring 22 for resetting the valve core 28 is abutted between the valve core 28 and the bottom of the valve chamber 10. The first spring 22 always has a tendency to push the valve core 28 to move closer to the static iron core 23. An abutment plate 231 is provided at the bottom of the static iron core 23. The abutment plate 231 is located on the lower side of the bushing 27, and a second spring 24 is abutted between the bushing 27 and the abutment plate 231. An abutment portion 100 abutting against the lower end of the abutment plate 231 is provided in the valve chamber 10. The second spring 24 always has a tendency to push the abutment plate 231 to move closer to the abutment portion 100.

[0023] The valve cavity 10 has an upper valve port 101 and a lower valve port 102. A sealing ring 30 is provided at the outer periphery of the middle portion of the valve core 28 to seal with the upper valve port 101 and the lower valve port 102. When the sealing ring 30 seals with the upper valve port 101, the air inlet 13 and the working port 12 are cut off, and the exhaust port 11 and the working port 12 are connected.

[0024] When the sealing ring 30 is in sealing cooperation with the lower valve port 102 , the air inlet 13 is connected with the working port 12 , and the air outlet 11 is blocked with the working port 12 .

[0025] In the present application, the working port 12 is located between the air inlet 13 and the air outlet 11 .

[0026] A filter screen 14 is provided in the air inlet 13 so as to filter impurities in the gas and prevent the impurities from entering the valve chamber 10 , thereby increasing the service life of the solenoid valve.

[0027] A piston 41 is movably provided in the through hole 32. The first moving iron core 25 is brought into contact with the piston 41 and then moves synchronously by manually pushing the piston 41. A Y-shaped ring 42 is provided on the outer periphery of the piston 41 to seal with the through hole 32, so the sealing is more reliable, the friction resistance is small and the application range is wide.

[0028] The valve core 28 has a spring cavity 21 in it. The first spring 22 is arranged in the spring cavity 21 . The spring cavity 21 makes it more convenient to install the first spring 22 .

[0029] A plurality of sealing rings 31 are sleeved on the outer periphery of the valve core 28 , so as to achieve a better sealing effect between the valve core 28 and the valve cavity 10 .

[0030] The bushing 27 includes an upper bushing 27 and a lower bushing 27 . The first movable iron core 25 is movably disposed in the upper bushing 27 . The lower bushing 27 is disposed to cover the outer periphery of the static iron core 23 . The second spring 24 abuts between the lower bushing 27 and the abutting plate 231 .

[0031] The working principle of the present application is as follows: when the coil assembly 33 is powered off, since the first spring 22 always has a tendency to push the valve core 28 to move closer to the static iron core 23, the sealing ring 30 is sealed with the upper valve port 101, the air inlet 13 is cut off from the working port 12, and the exhaust port 11 is connected to the working port 12; when the coil assembly 33 is powered on, the static iron core 23 obtains magnetic force, and at this time the first moving iron core 25 moves downward, thereby pushing the second moving iron core 26 to move downward, and then pushing the valve core 28 to move downward, thereby making the sealing ring 30 seal with the lower valve port 102, and at this time the air inlet 13 is connected to the working port 12, and the exhaust port 11 is cut off from the working port 12.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A bottom-connected solenoid valve, comprising a valve body (1) and a pilot head (2) mounted on the valve body (1), the pilot head (2) comprising a coil assembly (33) mounted on the valve body (1), the valve body (1) having a valve cavity (10), a valve core (28) being slidably connected in the valve cavity (10), the valve body (1) having an exhaust port (11), a working port (12) and an air inlet (13), characterized in that: The coil assembly (33) is sleeved with a bushing (27), a first moving iron core (25) is movably connected in the bushing (27), a through hole (32) is provided on the pilot head (2) and is located above the first moving iron core (25), a static iron core (23) is provided below the first moving iron core (25), the static iron core (23) is arranged in the bushing (27), a second moving iron core (26) is slidably connected in the static iron core (23), the second moving iron core (26) passes through the top of the static iron core (23), the lower end of the second moving iron core (26) abuts against the upper end of the valve core (28), and a contact is provided between the valve core (28) and the bottom of the valve chamber (10). A first spring (22) for resetting the valve core (28), the first spring (22) always has a tendency to push the valve core (28) to move closer to the static iron core (23), an abutment plate (231) is provided at the bottom of the static iron core (23), the abutment plate (231) is located at the lower side of the bushing (27), and a second spring (24) is abutted between the bushing (27) and the abutment plate (231), the valve cavity (10) has an abutment portion (100) abutting against the lower end of the abutment plate (231), and the second spring (24) always has a tendency to push the abutment plate (231) to move closer to the abutment portion (100).

2. The bottom-connected solenoid valve according to claim 1, characterized in that: The exhaust port (11), the working port (12) and the air inlet (13) are located on the same side of the valve body (1).

3. The bottom-connected solenoid valve according to claim 1 or 2, characterized in that: The valve cavity (10) is provided with an upper valve port (101) and a lower valve port (102); a sealing ring (30) is provided on the outer periphery of the middle portion of the valve core (28) and is in sealing cooperation with the upper valve port (101) and the lower valve port (102); when the sealing ring (30) is in sealing cooperation with the upper valve port (101), the air inlet (13) and the working port (12) are cut off, and the air outlet (11) and the working port (12) are communicated; When the sealing ring (30) is in sealing cooperation with the lower valve port (102), the air inlet (13) is connected to the working port (12), and the air outlet (11) is blocked from the working port (12).

4. The bottom-connected solenoid valve according to claim 1 or 2, characterized in that: A filter screen (14) is provided in the air inlet (13).

5. The bottom-connected solenoid valve according to claim 1, characterized in that: A piston (41) is movably disposed in the through hole (32), and the piston (41) is manually pushed so that the first moving iron core (25) contacts the piston (41) and moves synchronously thereafter.

6. The bottom-connected solenoid valve according to claim 5, characterized in that: The outer periphery of the piston (41) is provided with a Y-shaped ring (42) which seals with the through hole (32).

7. The bottom-connected solenoid valve according to claim 1, characterized in that: The valve core (28) has a spring chamber (21) therein, and the first spring (22) is arranged in the spring chamber (21).

8. The bottom-connected solenoid valve according to claim 1, characterized in that: A plurality of sealing rings (31) are sleeved on the outer periphery of the valve core (28).

9. The bottom-connected solenoid valve according to claim 1, characterized in that: The bushing (27) comprises an upper bushing (27) and a lower bushing (27), the first movable iron core (25) is movably disposed in the upper bushing (27), and the lower bushing (27) is disposed to cover the outer periphery of the static iron core (23).

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