Direct-acting electromagnetic valve

Abstract

The utility model belongs to the technical field of pipe valves, and provides a direct-acting electromagnetic valve which comprises a valve body, an arc-shaped left blocking piece is arranged at the position, close to a water inlet, of the valve body, an arc-shaped right blocking piece is arranged at the position, close to a water outlet, of the valve body, and a valve seat with a built-in cavity is arranged on the outer wall of the valve body; the valve core comprises a core rod, a core block, a stop block and a movable iron core; the reset unit comprises an adjusting knob and a reset spring, the adjusting knob is movably connected with the valve seat, the reset spring is located in the cavity, and the two ends of the reset spring are connected with the adjusting knob and the check block respectively; the magnetic control unit is detachably connected with the valve seat, and the movable iron core movably penetrates through the adjusting knob and extends upwards into the magnetic control unit. According to the direct-acting type electromagnetic valve, the effective working stroke of the spring in the electromagnetic valve can be adjusted so as to avoid the phenomenon of elasticity attenuation of the spring caused by use fatigue of the spring and the phenomenon of internal leakage of the electromagnetic valve caused by the elasticity attenuation, and meanwhile, due to the detachable split type structural design, the spring can be conveniently detached and replaced.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipe valves, and particularly relates to a direct-acting electromagnetic valve. Background Art

[0002] At present, direct-acting solenoid valves on the market usually use springs to reset the valve core. When the power is on, the coil of the solenoid valve drives the valve core to move to complete the opening and closing of the valve circuit. After the power is off, the valve core is reset to the initial state under the action of the spring. However, the existing direct-acting solenoid valve springs are generally fixed inside the valve body, which makes it inconvenient or even impossible to replace the springs individually. Due to the metal fatigue phenomenon of the spring after repeated reciprocating use, the elasticity of the spring is significantly attenuated, which causes the valve core to be unable to be accurately reset, resulting in internal leakage of the valve, such as the valve closure of the normally closed valve is not tight, the medium leaks, and the flow rate of the normally open valve is reduced, which seriously affects normal life and production. In addition, some existing direct-acting solenoid valves adopt an integrated closed structure, which is inconvenient to disassemble and replace the spring. When the spring is fatigued and attenuated, the solenoid valve can only be replaced as a whole, resulting in a short service life of the direct-acting solenoid valve and an increase in the maintenance and use costs of the solenoid valve.

[0003] Therefore, it is necessary to design a direct-acting solenoid valve with an adjustable spring working stroke to increase the service life and extend the maintenance cycle. Summary of the invention

[0004] In order to solve the above technical problems, the utility model proposes a direct-acting solenoid valve, which can adjust the effective working stroke of the spring inside the solenoid valve to avoid the spring elastic attenuation caused by spring fatigue and the internal leakage of the solenoid valve caused by it. At the same time, the detachable split structural design can facilitate the disassembly and replacement of the spring.

[0005] The technical solution of the utility model is:

[0006] The utility model provides a direct-acting solenoid valve, comprising:

[0007] A valve body, wherein the valve body is provided with a water inlet and a water outlet connected to each other, wherein an arc-shaped left baffle is provided near the water inlet, and an arc-shaped right baffle is provided near the water outlet, and a valve seat with a built-in cavity is provided on the outer wall of the valve body, wherein the cavity is connected to the valve body and arranged opposite to the left baffle and the right baffle;

[0008] A valve core, the valve core is movably arranged in the cavity, and comprises a core rod, a core block arranged at the bottom end of the core rod, a stopper connected to the core rod, and a moving iron core arranged at the top end of the core rod, the core block is adapted to the left stopper and the right stopper, the stopper is located between the core block and the moving iron core, and is movably arranged in the cavity;

[0009] A reset unit, the reset unit is arranged above the valve seat, and comprises an adjusting knob and a reset spring, the adjusting knob is movably connected to the valve seat, the reset spring is located in the cavity, and two ends of the reset spring are respectively connected to the adjusting knob and the stopper;

[0010] A magnetic control unit is arranged above the adjusting knob and is detachably connected to the valve seat. The moving iron core movably penetrates the adjusting knob and extends upward into the magnetic control unit.

[0011] Preferably, the lower end surface of the adjusting knob is provided with an upper accommodating groove adapted to the reset spring, the upper end surface of the stop block is provided with a lower accommodating groove adapted to the reset spring, and both ends of the reset spring are respectively embedded in the upper accommodating groove and the lower accommodating groove.

[0012] Preferably, pressure sensors are provided in the upper accommodating groove and the lower accommodating groove, and the pressure sensors are connected to the magnetic control unit, so that the pressure sensors detect the elastic force of the reset spring during each power-on process, thereby determining the elastic attenuation of the reset spring.

[0013] Preferably, the magnetic control unit comprises a magnetic pedestal and a fixed iron core arranged in the magnetic pedestal, and the magnetic pedestal is provided with a channel adapted to the moving iron core;

[0014] The moving iron core is movably arranged in the channel, and the fixed iron core is arranged opposite to the moving iron core.

[0015] Preferably, an adjustment block fixedly connected to the fixed iron core is provided on the top of the fixed iron core, and the adjustment block movably passes through the top of the magnetic base and extends outward.

[0016] Preferably, the valve seat comprises a tube seat portion and a base portion which are connected to each other, the cavity is located in the tube seat portion, and the base portion is detachably connected to the magnetic seat.

[0017] Preferably, a sealing ring is provided on the outer peripheral side of the stopper, and at least one sealing ring is provided.

[0018] Preferably, the left baffle and the right baffle are coaxially arranged, and there is an overlapping area between their projections along the axis direction of the valve body;

[0019] The cavity is coaxially arranged with the left baffle and the right baffle.

[0020] Preferably, the core rod, the core block, the stopper, and the moving iron core are of an integrated structure.

[0021] Compared with the prior art, the utility model has the following advantages and effects:

[0022] (1) A stopper movably arranged in the valve seat cavity is used, and the stopper is sealed and connected to the inner wall of the valve seat cavity, thereby preventing the medium in the valve body pipeline from flowing into the cavity, thereby preventing the medium from contacting the return spring in the valve seat cavity, preventing the return spring from rusting, ensuring that the return spring is in a dry and suitable working environment, and extending the service life of the return spring;

[0023] (2) The adjusting knob is movably connected to the valve seat. By changing the height of the adjusting knob, the distance between the adjusting knob and the baffle is changed, thereby changing the effective working stroke of the return spring to eliminate the elastic attenuation phenomenon caused by spring fatigue. It is simple to use and maintain, and can effectively increase the service life of the direct-acting solenoid valve;

[0024] (3) The reset unit and magnetic control unit are detachably connected to the valve body. The split detachable structure makes it easy to maintain and replace the reset spring separately, thereby increasing the overall service life of the direct-acting solenoid valve and reducing the cost of use and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the direct-acting solenoid valve in Example 1 of the utility model;

[0026] Figure 2 This is a schematic diagram of the explosion structure of the direct-acting solenoid valve in Example 1 of the utility model;

[0027] Figure 3 This is a schematic diagram of the internal structure of the direct-acting solenoid valve in Example 1 of the utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the adjusting knob in the direct-acting solenoid valve in Example 1 of the utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the valve core in the direct-acting solenoid valve in Example 1 of the utility model.

[0030] Figure numerals: 1. valve body; 11. water inlet; 12. water outlet; 13. left baffle; 14. right baffle; 15. valve seat; 151. pipe seat portion; 152. base portion; 2. valve core; 21. core rod; 22. core block; 23. baffle; 231. lower accommodating groove; 232. sealing ring; 24. moving iron core; 3. reset unit; 31. adjusting knob; 311. upper accommodating groove; 32. reset spring; 4. magnetic control unit; 41. magnetic base; 42. fixed iron core; 43. channel; 44. adjusting block. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the present invention, the present invention is now further described in conjunction with specific implementation methods.

[0032] Embodiment 1:

[0033] like Figure 1~Figure 5 As shown, the utility model provides a direct-acting solenoid valve, which includes a valve body 1, a valve core 2 vertically movably arranged in the valve body 1, and a reset unit 3 and a magnetic control unit 4 detachably connected to the valve body 1.

[0034] Combination Figure 2 , Figure 3 As shown, the valve body 1 is provided with a connected water inlet 11 and a water outlet 12. The valve body 1 is tubular and is provided with connecting parts at both ends. The connecting parts are provided with threaded structures so that it can be connected in series with the pipeline. A left baffle 13 is provided on the side of the valve body 1 close to the water inlet 11, and a right baffle 14 is provided on the side close to the water outlet 12. The left baffle 13 and the right baffle 14 are both arc-shaped and coaxially arranged. There is an overlapping area in the projection of the left baffle 13 and the right baffle 14 along the axis direction of the valve body 1. The valve body 1 is provided with a break port penetrating its side wall. The break port is coaxial with the left baffle 13 and the right baffle 14 and is arranged relatively. The outer wall of the valve body 1 is provided with a valve seat 15 located at the break port. The valve seat 15 includes a tube seat portion 151 and a base portion 152 connected to each other. The tube seat portion 151 of the valve seat 15 is provided with a cavity connected to the break port.

[0035] Optionally, in some embodiments, the valve seat 15 is connected to the valve body 1 in an integrated structure.

[0036] like Figure 2 , Figure 3 As shown, the valve core 2 is movably arranged at the on-off port of the valve body 1, and the valve core 2 includes a core rod 21, a core block 22 arranged at the bottom end of the core rod 21, a stopper 23 connected to the core rod 21, and a moving iron core 24 arranged at the top end of the core rod 21. The core block 22 is adapted to the left stopper 13 and the right stopper 14, and is sealed and connected to the left stopper 13 and the right stopper 14. Figure 3 As shown, when the core block 22 moves to the overlapping area of ​​the left baffle 13 and the right baffle 14 along the axial direction, the core block 22 is sealed and connected with the left baffle 13 and the right baffle 14 on both sides to form a circuit breaker.

[0037] like Figure 3 , Figure 5 As shown, the stopper 23 is located between the core block 22 and the moving iron core 24, and is movably arranged in the cavity of the tube seat portion 151 of the valve seat 15. A sealing ring 232 is arranged on the outer peripheral side of the stopper 23 to make it sealedly connected with the inner wall of the tube seat portion 151 of the valve seat 15, so as to achieve the function of sealing the on-off port. Two sealing rings 232 are evenly spaced to achieve a multi-layer sealing effect.

[0038] Optionally, in some embodiments, the core rod 21, the core block 22, the stopper 23, and the moving iron core 24 are connected in an integrated structure.

[0039] Combination Figure 2 , Figure 3 As shown, the reset unit 3 is arranged above the valve seat 15, and the reset unit 3 includes an adjusting knob 31 and a reset spring 32 connected to each other. The adjusting knob 31 is threadedly connected to the tube seat portion 151 of the valve seat 15, and the movable iron core 24 of the valve core 2 movably penetrates the adjusting knob 31 and extends upward. The two ends of the reset spring 32 are respectively fixedly connected to the adjusting knob 31 and the stopper 23 of the valve core 2, and the reset spring 32 is movably arranged in the cavity of the tube seat portion 151 of the valve seat 15.

[0040] like Figure 4 As shown, in this embodiment, the adjusting knob 31 is provided with an internal thread, and the tube seat portion 151 is provided with an external thread. The adjusting knob 31 is movably sleeved on the tube seat portion 151. By rotating the adjusting knob 31, the distance between the lower end surface of the adjusting knob 31 and the upper end surface of the stopper 23 of the valve core 2 is changed, that is, the effective action stroke of the reset spring 32 is changed, thereby overcoming the elastic attenuation phenomenon caused by aging and fatigue of the reset spring 32, avoiding the poor sealing and leakage caused by the above phenomenon, and improving the service life of the solenoid valve. It can also meet the needs of fine-tuning the valve opening in some production processes.

[0041] Combination Figure 4 , Figure 5 As shown, the lower end surface of the adjusting knob 31 is provided with an upper accommodating groove 311 adapted to the reset spring 32, and the upper end surface of the valve core 2 block 23 is provided with a lower accommodating groove 231 adapted to the reset spring 32, and the two ends of the reset spring 32 are fixedly embedded in the upper accommodating groove 311 and the lower accommodating groove 231 respectively.

[0042] Optionally, in some embodiments, pressure sensors (not shown in the figure) are provided in the upper accommodating groove 311 and the lower accommodating groove 231, and the pressure sensors are connected to the magnetic control unit 4, so that the pressure sensors detect the elastic force of the reset spring 32 during each power-on process, thereby determining the elastic attenuation of the reset spring 32, so as to adjust the rotation distance of the adjustment knob 31 according to the elastic attenuation of the spring.

[0043] like Figure 2 , Figure 3As shown, the magnetic control unit 4 is fixedly arranged above the valve seat 15 and the adjusting knob 31, and is detachably connected to the base portion 152 of the valve seat 15. The magnetic control unit 4 includes a magnetic base 41 and a fixed iron core 42 arranged in the magnetic base 41. The magnetic base 41 is provided with a channel 43 adapted to the moving iron core 24. The moving iron core 24 of the valve core 2 is movably arranged in the channel 43, and the fixed iron core 42 is arranged relative to the moving iron core 24. Specifically, a magnetic induction coil is arranged in the magnetic base 41, and the magnetic induction coil is wound around the outer periphery of the fixed iron core 42 and the moving iron core 24. In view of the mature prior art in this field, its specific structure is not repeated here.

[0044] like Figure 3 As shown, an adjustment block 44 fixedly connected to the fixed iron core 42 is provided on the top of the fixed iron core 42. The adjustment block 44 movably passes through the top of the magnetic base 41 and extends outward to adjust the position of the fixed iron core 42 in the channel 43, thereby changing the distance between the moving iron core 24 and the fixed iron core 42, and the magnetic force generated by the moving iron core 24, thereby achieving the effect of changing the opening of the regulating solenoid valve.

[0045] Specific, combined Figure 1 , Figure 2 As shown, the base 152 is provided with four spaced apart screw holes, and the magnetic base 41 is also provided with four screw holes opposite to the base, and the base and the magnetic base 41 can be fixedly connected by bolts.

[0046] It should be noted that the above-mentioned embodiment 1 and the accompanying drawings are described by taking a normally closed direct-acting solenoid valve as an example, but the direct-acting solenoid valve provided by the utility model can also be applicable to a normally open direct-acting solenoid valve.

[0047] To sum up, the direct-acting solenoid valve provided by the utility model can adjust the effective working stroke of the spring inside the solenoid valve to avoid the spring elastic attenuation caused by spring fatigue and the internal leakage of the solenoid valve caused by this. At the same time, the detachable split structural design can facilitate the disassembly and replacement of the spring.

[0048] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A direct-acting solenoid valve, characterized in that: include: A valve body (1), the valve body (1) being provided with a water inlet (11) and a water outlet (12) which are connected to each other, a left arc-shaped baffle (13) being provided near the water inlet (11), and a right arc-shaped baffle (14) being provided near the water outlet (12), and a valve seat (15) having a built-in cavity being provided on the outer wall of the valve body (1), the cavity being connected to the valve body (1) and being arranged opposite to the left baffle (13) and the right baffle (14); A valve core (2), the valve core (2) being movably arranged in the cavity, comprising a core rod (21), a core block (22) arranged at the bottom end of the core rod (21), a stopper (23) connected to the core rod (21), and a moving iron core (24) arranged at the top end of the core rod (21), the core block (22) being adapted to the left stopper (13) and the right stopper (14), the stopper (23) being located between the core block (22) and the moving iron core (24), and being movably arranged in the cavity; a reset unit (3), the reset unit (3) being arranged above the valve seat (15), and comprising an adjusting knob (31) and a reset spring (32), the adjusting knob (31) being movably connected to the valve seat (15), the reset spring (32) being located in the cavity, and having two ends thereof respectively connected to the adjusting knob (31) and the stopper (23); A magnetic control unit (4), the magnetic control unit (4) being arranged above the adjusting knob (31) and being detachably connected to the valve seat (15), the moving iron core (24) movably passing through the adjusting knob (31) and extending upward into the magnetic control unit (4).

2. The direct-acting solenoid valve according to claim 1, characterized in that: The lower end surface of the adjusting knob (31) is provided with an upper accommodating groove (311) adapted to the return spring (32), and the upper end surface of the stopper (23) is provided with a lower accommodating groove (231) adapted to the return spring (32), and two ends of the return spring (32) are respectively embedded in the upper accommodating groove (311) and the lower accommodating groove (231).

3. The direct-acting solenoid valve according to claim 1, characterized in that: The magnetic control unit (4) comprises a magnetic base (41) and a fixed iron core (42) arranged in the magnetic base (41); the magnetic base (41) is provided with a channel (43) adapted to the moving iron core (24); The moving iron core (24) is movably arranged in the channel (43), and the fixed iron core (42) is arranged relative to the moving iron core (24).

4. The direct-acting solenoid valve according to claim 3, characterized in that: An adjustment block (44) fixedly connected to the fixed iron core (42) is disposed on the top thereof, and the adjustment block (44) movably passes through the top of the magnetic base (41) and extends outward.

5. The direct-acting solenoid valve according to claim 3, characterized in that: The valve seat (15) comprises a tube seat portion (151) and a base portion (152) which are connected to each other; the cavity is located in the tube seat portion (151); and the base portion (152) is detachably connected to the magnetic seat (41).

6. The direct-acting solenoid valve according to claim 1, characterized in that: A sealing ring (232) is provided on the outer peripheral side of the stopper (23), and at least one sealing ring (232) is provided.

7. The direct-acting solenoid valve according to claim 1, characterized in that: The left baffle (13) and the right baffle (14) are coaxially arranged, and their projections along the axis direction of the valve body (1) have an overlapping area; The cavity is coaxially arranged with the left baffle (13) and the right baffle (14).

8. The direct-acting solenoid valve according to claim 1, characterized in that: The core rod (21), the core block (22), the stopper (23), and the moving iron core (24) are in an integrated structure.

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