Electromagnetic valve

Abstract

The electromagnetic valve comprises a valve body, the valve body comprises a magnetism isolating pipe, a static iron core, a magnetic flux core, a valve sleeve, a movable iron core, a valve element, a valve seat, a spring and an electromagnetic coil, a mounting cavity is formed in the magnetism isolating pipe, the static iron core is arranged at one end of the magnetism isolating pipe, the magnetic flux core is arranged at the end, away from the static iron core, of the magnetism isolating pipe, and the valve sleeve is arranged on the magnetic flux core; the valve seat is arranged on the valve sleeve; the movable iron core is slidably arranged in the mounting cavity, and the end, away from the static iron core, of the movable iron core penetrates through the magnetic flux core and is located in the valve sleeve. The valve element is arranged on the movable iron core located in the valve sleeve. One end, far away from the static iron core, of the spring is connected with the movable iron core; the electromagnetic coil is arranged on the magnetism isolating pipe; when the electromagnetic coil is not electrified, the distance between the static iron core and the movable iron core is smaller than the minimum length when the spring is compressed. The utility model has the effect of improving the magnetic flux capacity of the movable iron core.

Description

Technical Field

[0001] The present application relates to the technical field of valve bodies, and in particular to a solenoid valve. Background Art

[0002] Solenoid valves are electromagnetically controlled automotive parts. They are basic automation components used to control fluids and are actuators. Solenoid valves can be used with different circuits to achieve the desired control, and the control accuracy and flexibility can be guaranteed.

[0003] At present, a Chinese patent application numbered CN200720024930.6 discloses a switch solenoid valve for automobiles, comprising a valve body with an electromagnetic coil fixed thereon, a static iron core and a moving iron core installed in the cavity of the electromagnetic coil, and a valve plug located between the moving iron core and the valve body, wherein the two iron cores are connected by a spring and a spring pin, an air inlet hole and an air outlet hole which are controlled to be disconnected by the valve plug are provided on the valve body, and a balancing hole which connects the cavity at the upper end of the valve plug and the air inlet hole is provided on the valve plug.

[0004] Because there is a spring connected between the two iron cores, the static iron core is fixed, and the spring has a certain length even when compressed, so the length of the moving iron core in the electromagnetic coil cavity is limited, resulting in limited magnetic flux capacity of the moving iron core. Utility Model Content

[0005] In order to increase the magnetic flux capacity of a moving iron core, the present application provides a solenoid valve.

[0006] The present application provides a solenoid valve, which adopts the following technical solution:

[0007] A solenoid valve comprises a valve body, wherein the valve body comprises a magnetic isolation tube, a static iron core, a magnetic flux core, a valve sleeve, a moving iron core, a valve core, a valve seat, a spring and an electromagnetic coil, wherein the magnetic isolation tube forms an installation cavity, the static iron core is arranged at one end of the magnetic isolation tube, the magnetic flux core is arranged at an end of the magnetic isolation tube away from the static iron core, the valve sleeve is arranged on the magnetic flux core, and the valve seat is arranged on the valve sleeve; the moving iron core is slidingly arranged in the installation cavity, and the end of the moving iron core away from the static iron core passes through the magnetic flux core and is located in the valve sleeve; the valve core is arranged on the moving iron core located in the valve sleeve; a part of the spring is connected to the static iron core, and the end of the spring away from the static iron core is connected to the moving iron core; the electromagnetic coil is arranged on the magnetic isolation tube; when the electromagnetic coil is not energized, the distance between the static iron core and the moving iron core is less than the minimum length of the spring when it is compressed.

[0008] By adopting the above technical solution, when the electromagnetic coil is not energized, the distance between the static iron core and the moving iron core is smaller than the length of the deformation when the spring is compressed; thus, when the electromagnetic coil is energized and the electromagnetic force overcomes the spring elastic force to make the moving iron core move closer to the static iron core, the moving iron core can contact the static iron core, and when the moving iron core contacts the static iron core, the spring is not compressed to the minimum length; therefore, when the electromagnetic coil is not energized, more length of the moving iron core is located inside the electromagnetic coil, thereby increasing the magnetic flux capacity of the moving iron core.

[0009] Optionally, a first mounting groove for mounting the spring is formed on the static iron core, and a second mounting groove for placing the spring is formed on the moving iron core.

[0010] By adopting the above technical scheme, the first mounting groove and the second mounting groove that are first opened can limit the spring and reduce the phenomenon of spring distortion; and opening the first mounting groove on the static iron core can also reduce the depth of the second mounting groove, and can also make the moving iron core as much as possible located in the electromagnetic coil, thereby increasing the magnetic flux capacity of the moving iron core, while reducing the difficulty of the plating process required on the surface of the mounting groove, and reducing the accumulation of pollutants or processing debris in the groove. The solenoid valve is a first-stage direct-drive valve with improved magnetic flux efficiency, achieving the same opening pressure as the second-stage pilot valve, with a simple structure and low cost, and a small working current, so the power consumption is small and the heat is less.

[0011] Optionally, the flux core includes a mounting core and a limiting core, the mounting core is arranged at the end of the magnetic isolation tube away from the static iron core, and the valve sleeve is connected to the mounting core; the limiting core is arranged on the mounting core, and the end of the limiting core away from the mounting core is located in the mounting cavity; the end of the moving iron core away from the static iron core passes through the limiting core and the mounting core in sequence.

[0012] By adopting the above technical solution, the limiting core is located in the installation cavity, which can facilitate the installation of the limiting core and improve the installation efficiency.

[0013] Optionally, a limiting core body is provided on one end of the moving iron core close to the static iron core, and a cross-section of the limiting core body is not smaller than a cross-section of the limiting core body.

[0014] By adopting the above technical solution, when the limiting core body contacts the restricting core body, the restricting core body will block the limiting core body, thereby reducing the phenomenon of excessive movement of the moving iron core causing the spring to stretch and deform, and being able to limit the movement range of the moving iron core.

[0015] Optionally, a core bone is integrally formed on the moving iron core, and the valve core covers the core bone.

[0016] By adopting the above technical solution, the provided core bone facilitates the installation of the valve core, and also facilitates the replacement of the valve core when the valve core is damaged.

[0017] Optionally, the moving iron core includes a first moving core and a second moving core, the first moving core is connected to the spring, the second moving core is arranged at an end of the first moving core away from the spring, the second moving core passes through the magnetic flux core and is located in the valve sleeve, the valve core is arranged on the second moving core, and the cross-section of the second moving core is smaller than the cross-section of the first moving core.

[0018] By adopting the above technical solution, the cross section of the second moving core body is smaller than the cross section of the first moving core body, which can facilitate the subsequent installation of the valve sleeve.

[0019] Optionally, the valve seat is injection-molded and embedded in the valve sleeve.

[0020] By adopting the above technical solution, the valve seat is injection-molded and embedded in the valve sleeve, which can reduce the number of parts and components, thereby reducing costs and assembly difficulty.

[0021] Optionally, the valve sleeve is in a closed shape.

[0022] By adopting the above technical solution, the valve sleeve is in a closed shape, which can increase the stability of the valve seat embedded in the valve sleeve.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. The solenoid valve provided in the present application can increase the magnetic flux capacity of the moving iron core;

[0025] 2. The first installation groove and the second installation groove opened first can limit the spring and reduce the spring distortion; and opening the first installation groove on the static iron core can also reduce the depth of the second installation groove, and can also make the moving iron core as much as possible located in the electromagnetic coil, thereby increasing the magnetic flux capacity of the moving iron core, while reducing the difficulty of the coating process required on the surface of the installation groove, and reducing the accumulation of pollutants or processing debris in the groove. The solenoid valve is a first-stage direct-drive valve with improved magnetic flux efficiency, achieving the same opening pressure as the second-stage pilot valve, with a simple structure and low cost, and a small working current, so it has low power consumption and less heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a cross-sectional view of the solenoid valve in the embodiment of the present application.

[0027] Figure numerals: 1. magnetic isolation tube; 11. installation cavity; 2. static iron core; 21. first installation groove; 3. magnetic flux core; 31. installation core body; 32. limiting core body; 4. valve sleeve; 41. fixing sleeve; 411. third through hole; 42. closing sleeve; 421. fourth through hole; 43. connecting sleeve; 431. fifth through hole; 432. second inlet and outlet; 5. moving iron core; 51. first moving core body; 511. second installation groove; 52. second moving core body; 6. valve core; 7. valve seat; 71. first inlet and outlet; 8. spring; 9. limiting core body; 10. core bone. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1 This application is described in further detail.

[0029] The embodiment of the present application discloses a solenoid valve.

[0030] refer to Figure 1 A solenoid valve includes a valve body, the valve body includes a magnetic isolation tube 1, and the magnetic isolation tube 1 is formed with an installation cavity 11; a static iron core 2 is fixedly connected to one end of the magnetic isolation tube 1, one end of the static iron core 2 is located in the installation cavity 11 of the magnetic isolation tube 1 and the other end is located outside the installation cavity 11; a magnetic flux valve is arranged at one end of the magnetic isolation tube 1 away from the static iron core 2, a valve sleeve 4 is arranged at one end of the magnetic flux valve away from the magnetic flux core 3, a valve seat 7 is arranged at one end of the valve sleeve 4 away from the magnetic flux core 3, and a first inlet and outlet 71 is opened on the valve seat 7; a moving iron core 5 is slidably connected in the installation cavity 11 of the magnetic isolation tube 1, a spring 8 connected to the feed iron core is connected to the moving iron core 5, and a valve core 6 is connected to one end of the moving iron core 5 away from the static iron core 2, and the first inlet and outlet 71 of the valve seat 7 can be blocked. An electromagnetic coil is wound around the outer wall of the magnetic isolation tube 1 along its circumference.

[0031] refer to Figure 1 The flux core 3 includes a mounting core 31 fixedly connected to the end of the flux tube away from the static iron core 2, and a first through hole connected to the magnetic isolation tube 1 is provided on the mounting core 31; a limiting core 32 is integrally provided on the side of the mounting core 31 close to the static iron core 2, and a second through hole connected to the first through hole on the mounting core 31 is provided on the limiting core 32, and the end of the limiting core 32 away from the mounting core 31 is located in the mounting cavity 11 of the magnetic isolation tube 1, and the outer side wall of the limiting core 32 contacts the side wall of the mounting cavity 11; there is a certain distance between the end of the limiting core 32 away from the mounting core 31 and the side of the static iron core 2 close to the mounting core 31.

[0032] refer to Figure 1The valve sleeve 4 includes a fixed sleeve 41, which is fixed to the end of the mounting core 31 away from the limiting core 32, and a third through hole 411 is provided on the fixed sleeve 41; a closing sleeve 42 is integrally provided at the end of the fixing sleeve 41 away from the mounting core 31, and a fourth through hole 421 communicating with the third through hole 411 is provided on the closing sleeve 42; a connecting sleeve 43 is integrally formed at the end of the closing sleeve 42 away from the fixing sleeve 41, and a fifth through hole 431 communicating with the fourth through hole 421 is provided on the connecting sleeve 43, and a second inlet and outlet 432 communicating with the fifth through hole 431 is provided on the connecting sleeve 43; the cross section of the fourth through hole 421 gradually decreases in the direction away from the fixing sleeve 41, so that the valve sleeve 4 composed of the fixing sleeve 41, the closing sleeve 42 and the connecting sleeve 43 is designed to be closed.

[0033] refer to Figure 1 The valve seat 7 is injection-molded and embedded in one end of the connecting sleeve 43 away from the fixing sleeve 41 and blocks the fifth through hole 431 . The first inlet and outlet 71 on the valve seat 7 is connected to the fifth through hole 431 on the connecting sleeve 43 .

[0034] refer to Figure 1 The moving iron core 5 includes a first moving core body 51 which is slidably connected to the installation cavity 11. The end of the first moving core body 51 close to the stationary iron core 2 is integrally provided with a ring-shaped limiting core body 9. The outer wall of the limiting core body 9 abuts against the side wall in the installation cavity 11, and the limiting core body 9 is located between the limiting core body 32 and the stationary iron core 2; the end of the first moving core body 51 close to the stationary iron core 2 is provided with a second installation groove 511, and the end of the stationary iron core 2 close to the first moving core body 51 is provided with a first installation groove 21, and one end of the spring 8 is located at the first installation groove 21 of the stationary iron core 2. In the groove 21, the end of the spring 8 away from the static iron core 2 is located in the second mounting groove 511 of the first moving core body 51; and when the electromagnetic coil is not energized, the spring 8 is in a normal state, and the distance between the static iron core 2 and the first moving core body 51 is less than the minimum length of the spring 8 when it is compressed; when the electromagnetic coil is not energized, the distance between the static iron core 2 and the first moving core body 51 is one fifth of the spring 8; in order to improve the stability of the spring 8, a spring 8 seat can be placed in both the first mounting groove 21 and the second mounting groove 511.

[0035] refer to Figure 1 A second moving core 52 is integrally provided at one end of the first moving core 51 away from the static iron core 2, and the end of the second moving core 52 away from the first moving core 51 passes through the second through hole on the limiting core 32 and the first through hole on the mounting core 31 in sequence and is located in the third through hole 411 of the fixing sleeve 41, and the end of the first moving core 51 away from the spring 8 passes through the second through hole on the limiting core 32 and is located in the first through hole on the mounting core 31.

[0036] The cross-section of the second moving core 52 is smaller than that of the first moving core 51, so that the vertical cross-section of the moving iron core 5 composed of the first moving core 51 and the second moving core 52 is T-shaped; the end of the second moving core 52 away from the first moving core 51 is 3D printed with a core bone 10, and the vertical cross-section of the core bone 10 is inverted T-shaped; the core valve covers the core bone 10 and contacts the end of the second moving core 52 away from the first moving core 51.

[0037] refer to Figure 1 One end of the valve core 6 away from the static iron core 2 passes through the fourth through hole 421 of the closing sleeve 42 and is located in the fifth through hole 431 of the connecting sleeve 43 to block the first inlet and outlet 71 of the valve seat 7 .

[0038] The implementation principle of an electromagnetic valve in an embodiment of the present application is: first, place the end of the first moving core 51 close to the limiting core 9 into the installation cavity 11 of the magnetic isolation tube 1, and then place the end of the limiting core 32 away from the installation core 31 into the installation cavity 11 of the magnetic isolation tube 1, and the installation core 31 contacts the magnetic isolation tube 1, and the installation core 31 is welded to the magnetic isolation tube 1.

[0039] Next, place one end of the spring 8 in the second mounting groove 511 of the first moving core 51, and then extend the end of the static iron core 2 with the first mounting groove 21 into the mounting cavity 11 of the magnetic isolation tube 1, and the end of the spring 8 away from the second moving core 52 is located in the first mounting groove 21 of the static core, and then weld the static core to the magnetic isolation tube 1.

[0040] Then, the valve core 6 is sleeved onto the core bone 10 of the second core body, and then the fixing sleeve 41 is welded to the side of the installation core body 31 away from the limiting core body 32 , so that the valve core 6 is aligned with and blocks the first inlet and outlet 71 of the valve seat 7 .

[0041] Finally, the electromagnetic coil is wound on the side wall of the magnetic isolation block.

[0042] When the electromagnetic coil is energized, the first moving core 51 will move toward the static iron core 2 and resist the static iron core 2. At this time, the valve core 6 no longer blocks the first inlet and outlet 71 on the valve seat 7, so that the first inlet and outlet 71 is connected with the second inlet and outlet 432 through the fifth through hole 431, and the spring 8 will also be in a compressed state.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A solenoid valve, comprising a valve body, characterized in that: The valve body comprises a magnetic isolation tube (1), a static iron core (2), a magnetic flux core (3), a valve sleeve (4), a moving iron core (5), a valve core (6), a valve seat (7), a spring (8) and an electromagnetic coil; the magnetic isolation tube (1) forms an installation cavity (11); the static iron core (2) is arranged at one end of the magnetic isolation tube (1); the magnetic flux core (3) is arranged at one end of the magnetic isolation tube (1) away from the static iron core (2); the valve sleeve (4) is arranged on the magnetic flux core (3); the valve seat (7) is arranged on the valve sleeve (4); the moving iron core (5) is slidably arranged in the installation cavity (11); The end of the moving iron core (5) away from the static iron core (2) passes through the magnetic flux core (3) and is located in the valve sleeve (4); the valve core (6) is arranged on the moving iron core (5) located in the valve sleeve (4); a part of the spring (8) is connected to the static iron core (2), and the end of the spring (8) away from the static iron core (2) is connected to the moving iron core (5); the electromagnetic coil is arranged on the magnetic isolation tube (1); when the electromagnetic coil is not energized, the distance between the static iron core (2) and the moving iron core (5) is less than the minimum length of the spring (8) when it is compressed.

2. A solenoid valve according to claim 1, characterized in that: The static iron core (2) is provided with a first installation groove (21) for installing the spring (8), and the moving iron core (5) is provided with a second installation groove (511) for placing the spring (8).

3. The solenoid valve according to claim 1, characterized in that: The magnetic flux core (3) comprises a mounting core (31) and a limiting core (32); the mounting core (31) is arranged at one end of the magnetic isolation tube (1) away from the static iron core (2); the valve sleeve (4) is connected to the mounting core (31); the limiting core (32) is arranged on the mounting core (31), and the end of the limiting core (32) away from the mounting core (31) is located in the mounting cavity (11); the end of the moving iron core (5) away from the static iron core (2) passes through the limiting core (32) and the mounting core (31) in sequence.

4. A solenoid valve according to claim 3, characterized in that: A limiting core body (9) is provided on one end of the moving iron core (5) close to the static iron core (2), and the cross-section of the limiting core body (9) is not less than the cross-section of the limiting core body (32).

5. The solenoid valve according to claim 1, characterized in that: A core bone (10) is integrally formed on the moving iron core (5), and the valve core (6) covers the core bone (10).

6. The solenoid valve according to claim 1, characterized in that: The moving iron core (5) comprises a first moving core body (51) and a second moving core body (52), wherein the first moving core body (51) is connected to the spring (8), and the second moving core body (52) is arranged at an end of the first moving core body (51) away from the spring (8), the second moving core body (52) passes through the magnetic flux core (3) and is located in the valve sleeve (4), the valve core (6) is arranged on the second moving core body (52), and the cross-section of the second moving core body (52) is smaller than the cross-section of the first moving core body (51).

7. The solenoid valve according to claim 1, characterized in that: The valve seat (7) is injection-molded and embedded on the valve sleeve (4).

8. The solenoid valve according to claim 1, characterized in that: The valve sleeve (4) is in a closed shape.

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