Electromagnetic valve capable of adjusting response time

Abstract

The utility model discloses an electromagnetic valve capable of adjusting response time, which comprises a valve body and an electromagnetic driving part, the electromagnetic driving part comprises a shell, and the shell is provided with a first guide channel along the vertical direction. And the fixed iron core is arranged in the first guide channel, the fixed iron core can move up and down along the first guide channel and is fixed to the shell, and the fixed iron core is provided with a second guide channel in the vertical direction. And the movable iron core and the fixed iron core are arranged at an interval. And the adjusting part is inserted into the channel and can be fixed with the fixed iron core, one end, close to the movable iron core, of the adjusting part can extend out of the second guide channel, and the adjusting part can move up and down along the second guide channel to adjust a gap between the adjusting part and the movable iron core. The electromagnetic valve is simple in structure, and the response time of the electromagnetic valve can be adjusted by adjusting the moving distance of the movable iron core.

Description

Technical Field

[0001] The utility model relates to the technical field of solenoid valves, in particular to a solenoid valve with adjustable response time. Background Art

[0002] To improve the analytical accuracy of analytical instruments, it is necessary to increase the accuracy of the response time of solenoid valves used for fluid control. In existing solenoid valves, the response time varies depending on various parameters. For example, the gap between the movable and fixed cores, the plating thickness of the movable and fixed cores, and the spring load all affect the solenoid valve's response time due to deviations during the manufacturing process. Using the gap between the movable and fixed cores to adjust the response time typically results in a complex structure, increasing manufacturing costs. The adjustment range is also limited, making it difficult to adjust in both energized and de-energized states. Utility Model Content

[0003] In order to overcome the above shortcomings, the purpose of the present invention is to provide a solenoid valve with adjustable response time, which has a simple structure and can adjust the response time of the solenoid valve by adjusting the moving distance of the movable iron core.

[0004] In order to achieve the above objectives, the technical solution adopted by the present invention is: a solenoid valve with adjustable response time, comprising a valve body and an electromagnetic drive unit, wherein the electromagnetic drive unit comprises:

[0005] A housing, wherein the housing is provided with a first guide channel along a vertical direction;

[0006] A fixed iron core is disposed in the first guide channel, the fixed iron core can move up and down along the first guide channel and is fixed to the housing, and the fixed iron core has a second guide channel opened in the vertical direction;

[0007] A movable iron core, wherein the movable iron core is spaced apart from the fixed iron core;

[0008] An adjusting member is inserted into the channel and can be fixed to the fixed iron core. The adjusting member can extend out of the second guide channel at one end close to the movable iron core. The adjusting member can move up and down along the second guide channel to adjust the gap between the adjusting member and the movable iron core.

[0009] The beneficial effects of the present invention are:

[0010] The fixed iron core is arranged to be movable up and down in the first guide channel, that is, the height position of the fixed iron core in the first channel is adjusted;

[0011] Add an adjustment member, which can be relatively fixed to adjust the position. When the movable iron core abuts against the end of the adjustment member, the movable iron core stops and cannot move up. That is, the movable member can adjust the displacement distance of the movable iron core, thereby adjusting the response time.

[0012] The position of the fixed iron core is adjustable, and the displacement distance of the movable iron core is adjustable through the adjusting piece. In the two states of the solenoid valve being energized and not energized, the stop position of the movable iron core and the gap between the fixed iron core are adjusted, thereby adjusting the opening and closing time of the valve.

[0013] Furthermore, the fixed core is threadedly connected to the housing, and the fixed core and the housing are fixed by glue. The threaded connection between the two facilitates adjustment of the position of the fixed core, and after adjustment, the fixed core is fixed by glue, which facilitates assembly.

[0014] Furthermore, the side wall of the second guide channel is provided with an internal thread, and the adjusting member is threadedly connected to the channel. The position of the adjusting member can be quickly adjusted through the thread structure of the second guide channel.

[0015] Furthermore, a locking nut located outside the housing is fixed to one end of the fixed core away from the movable core, and the adjusting member is threadedly connected to the locking nut. In this case, there is no need to provide an internal thread in the second guide channel, which facilitates processing.

[0016] Furthermore, the adjusting member extends out of the housing on a side away from the movable iron core and is fixed with an adjusting portion, which is convenient for handholding and can be rotated to adjust the position of the adjusting member.

[0017] Furthermore, the adjusting member, the housing, the movable iron core, the fixed iron core and the second guide channel are all coaxially arranged, and the movable iron core is evenly stressed and moves more stably.

[0018] Furthermore, the electromagnetic driving part further includes a coil, which is wound around a portion of the outer side of the fixed iron core. When the coil is energized, the movable iron core can move toward the fixed iron core in a vertical direction.

[0019] Furthermore, the solenoid valve also includes a diaphragm, the edge of which is fixed between the shell and the valve body, the middle position of the diaphragm is fixedly connected to the end of the movable iron core away from the fixed iron core, and a cavity is formed between the diaphragm and the valve body that is connected to the liquid inlet channel and the liquid outlet channel on the valve body.

[0020] Furthermore, the thickness of the middle position of the diaphragm is greater than the thickness of the edge of the diaphragm, the opening position of the liquid inlet channel corresponds to the middle position of the diaphragm, and the middle position of the diaphragm can open and close the opening of the liquid inlet channel during the up and down movement.

[0021] Furthermore, the solenoid valve further includes a spring, which is sleeved on the movable iron core. The spring provides a pre-tightening force for the middle position of the diaphragm to press downward on the opening of the liquid inlet channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model.

[0023] In the picture:

[0024] 1. Housing; 11. First guide channel;

[0025] 2. Valve body; 21. Liquid inlet channel; 22. Liquid outlet channel;

[0026] 3. Fixed iron core; 31. Second guide channel;

[0027] 4. Movable iron core;

[0028] 5. Adjustment member; 51. Adjustment unit;

[0029] 6. Lock nut;

[0030] 7. Coil;

[0031] 8. Spring;

[0032] 9. Diaphragm; 91. Cavity. DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0034] Example

[0035] See attached Figure 1 As shown, the utility model is a solenoid valve with adjustable response time, the solenoid valve includes a valve body 2 and an electromagnetic drive part, the solenoid valve can adjust the distance between the fixed iron core 3 and the movable iron core 4, and further adjust the movable distance of the movable iron core 4, so as to adjust the response time of the solenoid valve.

[0036] The electromagnetic drive unit includes a housing 1 , a fixed iron core 3 , a movable iron core 4 and an adjusting member 5 .

[0037] The housing is provided with a first guide channel 11 along the vertical direction. The fixed iron core 3 and the movable iron core 4 are arranged vertically in the first guide channel 11. When the solenoid valve is powered on and off, the movable iron core 4 can move up and down along the first wire channel. The fixed iron core 3 is provided in the first guide channel 11 and can move up and down along the first guide channel 11 and is fixed to the housing.

[0038] In this embodiment, compared to the prior art structure in which the fixed core 3 and the housing 1 are completely fixed, the fixed core 3 is configured to move up and down within the first guide channel 11. In other words, the height position of the fixed core 3 within the first channel can be adjusted. When power is off, the fixed core 3 is rotated to adjust its position. Once adjusted to the correct position, the fixed core 3 and the housing 1 are fixed, and the position of the fixed core 3 is no longer adjusted.

[0039] The fixed core 3 has a second guide channel 31 formed in the vertical direction. The adjusting member 5 is inserted into the channel and can be fixed to the fixed core 3. The end of the adjusting member 5 near the movable core 4 can extend out of the second guide channel 31. The adjusting member 5 can move up and down along the second guide channel 31 to adjust the gap between the adjusting member 5 and the movable core 4.

[0040] In this embodiment, an adjusting member 5 is added to allow for a relatively fixed, adjustable position. When the movable core 4 abuts the end of the adjusting member 5, the movable core 4 stops and cannot move further upward. In other words, the movable member can adjust the displacement of the movable core 4, thereby adjusting the response time. The larger the gap between the resting position of the movable core 4 and the fixed core 3, the lower the coercive force and the faster the valve closes.

[0041] In this embodiment, the position of the fixed iron core 3 is adjustable, and the displacement distance of the movable iron core 4 is adjustable by the adjusting member 5. When the solenoid valve is energized or not energized, the stop position of the movable iron core 4 and the gap between the fixed iron core 3 are adjusted, so that the opening and closing time of the valve can be adjusted.

[0042] In one embodiment, the fixed core 3 is threadedly connected to the housing, and the fixed core 3 and the housing are secured together with glue. The position of the fixed core 3 can be adjusted by rotating the fixed core 3. After the position of the fixed core 3 is adjusted, the fixed core 3 and the housing are secured with glue, and the position of the fixed core 3 is no longer adjustable. The threaded connection allows for quick adjustment of the position of the fixed core 3.

[0043] As shown in the drawings, the upper end of the shell has an upper end opening corresponding to the fixed iron core 3, and the fixed iron core 3 can be rotated from the upper end opening to adjust the position of the fixed iron core 3.

[0044] In one embodiment, an internal thread is provided on the side wall of the second guide channel 31, and the adjusting member 5 is threadedly connected to the channel. At this time, after the adjusting member 5 is inserted into the second guide channel 31, the position of the adjusting member 5 can be adjusted by directly rotating the adjusting member 5. The further the adjusting member 5 extends out of the second channel at one end close to the movable body, the shorter the distance the movable iron core 4 can move, and the faster the response time. Each time the solenoid valve is powered on, the position of the adjusting member 5 can be adjusted, and a threaded connection is used, so that the position of the adjusting member 5 can be adjusted each time it is used. After the adjusting member 5 is adjusted to the specified position, the adjusting member 5 is threadedly connected to the second guide channel 31, and the position of the adjusting member 5 no longer moves. When the response time needs to be readjusted next time, the position of the adjusting member 5 is adjusted again.

[0045] In one embodiment, a locking nut 6 located outside the housing 1 is secured to the end of the fixed core 3 facing away from the movable core 4. The adjusting member 5 is threadedly connected to the locking nut 6. In this case, no internal threads are required within the second guide channel 31; a single locking nut 6 can be secured to the fixed core 3, facilitating processing. Simply rotating the adjusting member 5, in conjunction with the locking nut 6, allows for upward and downward movement, adjusting the resting position of the movable core 4 after power is applied. When not rotating, the adjusting member 5 remains fixed in position, acting as a stop.

[0046] The adjusting member 5 extends out of the housing 1 at a side away from the movable iron core 4 and is fixed with an adjusting portion 51 . The adjusting portion 51 is convenient for manual gripping to rotate the adjusting member 5 .

[0047] The adjusting member 5, the housing 1, the movable iron core 4, the fixed iron core 3 and the second guide channel 31 are all coaxially arranged. At this time, the electromagnetic drive part is an axisymmetric structure, the movement of the movable iron core 4 is more stable, and the sealing effect on the valve body 2 is also better.

[0048] The electromagnetic drive unit further includes a coil 7 and a spring 8. The coil 7 is wound around a portion of the outside of the fixed iron core 3. When the coil 7 is energized, the movable iron core 4 can move vertically toward the fixed iron core 3. The solenoid valve further includes a spring 8, which is sleeved on the movable iron core 4 and provides a preload force to press the middle position of the diaphragm 9 downward against the opening of the liquid inlet channel 21.

[0049] When the coil 7 is energized, a magnetic force is generated through the fixed iron core 3, attracting the movable iron core 4 to move toward the fixed iron core 3, and the solenoid valve is opened at this time; when the coil 7 is de-energized, the magnetic force disappears, and the movable iron core 4 moves toward the side away from the fixed iron core 3 under the action of the spring 8, and the solenoid valve is closed at this time.

[0050] The movable iron core 4 has a first boss extending circumferentially, and a second boss located above the first boss is provided in the first guide channel 11. The two ends of the spring 8 are respectively against the first boss and the second boss. When the solenoid valve is closed, the spring 8 is in a compressed state, providing a force for the movable iron core 4 to move downward.

[0051] The solenoid valve also includes a diaphragm 9, the edge of which is fixed between the shell 1 and the valve body 2, the middle position of the diaphragm 9 is fixedly connected to the end of the movable iron core 4 away from the fixed iron core 3, and the valve body 2 is provided with a liquid inlet channel 21 and a liquid outlet channel 22 that are not connected to each other. A cavity 91 that is connected to both the liquid inlet channel 21 and the liquid outlet channel 22 is formed between the diaphragm 9 and the valve body 2.

[0052] The thickness of the middle portion of the diaphragm 9 is greater than the thickness of the edge of the diaphragm 9. The opening of the liquid inlet channel 21 corresponds to the middle portion of the diaphragm 9. The middle portion of the diaphragm 9 can open and close the opening of the liquid inlet channel 21 during its upward and downward movement. When the diaphragm 9 moves up and down driven by the movable iron core 4, it can open and close the opening of the liquid inlet channel 21, thereby opening and closing the solenoid valve.

[0053] The above implementation methods are only for illustrating the technical concept and features of the utility model. Its purpose is to enable people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the scope of protection of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the scope of protection of the utility model.

Claims

1. A solenoid valve with adjustable response time, comprising a valve body and an electromagnetic drive unit, characterized in that: The electromagnetic drive unit includes: A housing, wherein the housing is provided with a first guide channel along a vertical direction; A fixed iron core is disposed in the first guide channel, the fixed iron core can move up and down along the first guide channel and is fixed to the housing, and the fixed iron core has a second guide channel opened in the vertical direction; A movable iron core, wherein the movable iron core is spaced apart from the fixed iron core; An adjusting member is inserted into the channel and can be fixed to the fixed iron core. The adjusting member can extend out of the second guide channel at one end close to the movable iron core. The adjusting member can move up and down along the second guide channel to adjust the gap between the adjusting member and the movable iron core.

2. The solenoid valve with adjustable response time according to claim 1, characterized in that: The fixed iron core and the shell are threadedly connected, and the fixed iron core and the shell are fixed by glue.

3. The solenoid valve with adjustable response time according to claim 1, characterized in that: An internal thread is provided on the side wall of the second guide channel, and the adjusting member is threadedly connected to the channel.

4. The solenoid valve with adjustable response time according to claim 1, characterized in that: A locking nut located outside the shell is fixed to one end of the fixed iron core away from the movable iron core, and the adjusting member is threadedly connected to the locking nut.

5. The solenoid valve with adjustable response time according to claim 1, characterized in that: The adjusting member extends out of the housing at a side away from the movable iron core and is fixed with an adjusting portion.

6. The solenoid valve with adjustable response time according to any one of claims 1 to 5, characterized in that: The adjusting member, the housing, the movable iron core, the fixed iron core and the second guide channel are all coaxially arranged.

7. The solenoid valve with adjustable response time according to claim 1, characterized in that: The electromagnetic driving part further includes a coil, which is wound around a portion of the outer side of the fixed iron core. When the coil is energized, the movable iron core can move toward the fixed iron core in a vertical direction.

8. The solenoid valve with adjustable response time according to claim 1, characterized in that: The solenoid valve also includes a diaphragm, the edge of which is fixed between the shell and the valve body, the middle position of the diaphragm is fixedly connected to the end of the movable iron core away from the fixed iron core, and a cavity is formed between the diaphragm and the valve body, which is connected to the liquid inlet channel and the liquid outlet channel on the valve body.

9. The solenoid valve with adjustable response time according to claim 8, characterized in that: The thickness of the middle position of the diaphragm is greater than the thickness of the edge of the diaphragm. The opening position of the liquid inlet channel corresponds to the middle position of the diaphragm. The middle position of the diaphragm can open and close the opening of the liquid inlet channel during the up and down movement.

10. The solenoid valve with adjustable response time according to claim 9, characterized in that: The solenoid valve further comprises a spring, which is sleeved on the movable iron core and provides a pre-tightening force for pressing the middle position of the diaphragm downwardly against the opening of the liquid inlet channel.

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