Electromagnetic valve

Abstract

The utility model discloses an electromagnetic valve which comprises a coil body and a valve seat, the middle of the coil body is downwards provided with a through cavity, the valve seat is provided with an upwards inner cavity, the lower portion of the coil body is in butt joint with a middle connecting piece, the middle of the middle connecting piece is through, the lower portion of the middle connecting piece is inserted into the inner cavity of the valve seat, and the coil body, the middle connecting piece and the valve seat are fixed through screws. The diameter of the middle part of the iron core is greater than the diameters of the upper end and the lower end of the iron core; the lower part of the iron core is provided with an abutting head which can be sleeved in an inner cavity at the upper part of the blocking cap; the upper part of the abutting head is provided with a connecting rod; the lower part of the connecting rod is provided with a chock plug of which the diameter is greater than that of the connecting rod; the lower end face of the plug cap plugs a water passing opening in the inner cavity of the valve seat. And a sealing ring and a sealing gasket are respectively arranged at the joint of the middle connecting piece and the coil and the joint of the middle connecting piece and the valve seat. According to the electromagnetic valve, the short-range spring is matched with the thick iron core, so that the electromagnetic valve is sensitive to open and close and can keep lasting sensitivity, and the sealing performance is good.

Description

Technical Field

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

[0002] Solenoid valves are needed in water purifiers, water boilers and other products. Solenoid valves are key devices for controlling water circuit switches. The principle is that electricity generates magnetism. When the power is turned on, the coil generates magnetic force, and when the power is turned off, the magnetic force disappears. The on and off of the magnetic force is used to coordinate the position movement of an iron core. The sealing of conventional solenoid valves needs to be improved, especially the sensitivity will gradually decrease with the extension of the use time, and the tightness of opening and closing is not good. The reasons for this problem are: (1) The spring is designed to be too long and the balance between the spring elastic force and the weight of the iron core is not set well; (2) The spring is mechanically fatigued during use and the elastic force is insufficient; (3) The magnetic force generated by the iron core and the coil is insufficient, and the spring elastic force is too small, resulting in an insufficient seal.

[0003] Based on the above problems, a design solution is needed to solve the problems of poor sealing and low opening and closing sensitivity. Utility Model Content

[0004] In view of the above-mentioned defects of the prior art, the purpose of the present utility model is to provide a solenoid valve.

[0005] The technical solution of the utility model is: a solenoid valve, including a coil body and a valve seat that generates magnetism after power is turned on, a through cavity is opened downward in the middle of the coil body, and the valve seat has an inner cavity opened upward, the inner cavity is connected to the inlet and outlet at both ends of the valve seat, the through cavity is located above the middle of the inner cavity port, the lower part of the coil body is connected to a middle connector, the middle part of the middle connector is through, the lower part of the middle connector is inserted into the inner cavity of the valve seat, and the coil body, the middle connector and the valve seat are fixed by screws; a short-range spring and an iron core are placed in sequence with the through cavity facing downward, the short-range spring is sleeved on the upper part of the iron core, and a blocking cap is sleeved on the lower part of the iron core, the diameter of the middle part of the iron core is larger than the diameter of the upper and lower ends thereof, the lower part of the iron core is provided with a butt head that can be sleeved on the inner cavity of the upper part of the blocking cap, the upper part of the butt head is a connecting rod, the lower part of the connecting rod is a plug with a diameter larger than the connecting rod, and the lower end face of the blocking cap blocks the water inlet in the inner cavity of the valve seat.

[0006] Furthermore, the upper part of the middle connector has a square platform, and the four corners of the platform are fixing ears with through holes. The lower part of the middle connector is a cylinder, which is inserted into the inner cavity of the valve seat and fits with the inner cavity wall of the valve seat. The lower part of the fixing ear is docked and fits with the screw holes set around the inner cavity of the valve seat, and the upper part of the fixing ear fits with the screw holes at the bottom of the coil body. The coil body, the middle connector and the valve seat form a fixed connection structure by using screws passing through the screw holes and the fixing ears.

[0007] Furthermore, the water through port is located in the middle of the inner cavity and opens toward the upper part of the inner cavity, and the water through port is connected to the inlet and outlet on one side of the valve seat.

[0008] Furthermore, an upper port that passes through the middle of the middle connector is provided with a notch, and a sealing ring is built into the notch.

[0009] Furthermore, a sealing gasket is provided at the bottom of the inner cavity of the valve seat, and the upper part of the sealing gasket is abutted against the bottom end of the cylinder at the lower part of the intermediate connecting piece.

[0010] Furthermore, the iron core is sleeved in a channel that passes through the middle of the middle connecting piece.

[0011] The application of the solenoid valve provided by the utility model has the following beneficial effects: the solenoid valve is sensitive in opening and closing, and the sensitive state is maintained for a long time. The design advantage of the short-stroke spring combined with the thick iron core is that the short-stroke spring can reduce the telescopic distance to avoid mechanical damage, and the thick iron core can be magnetized and lifted better. When the elastic force of the short-stroke spring and the weight of the iron core are adjusted to the optimal state, excellent opening and closing performance can be exerted. The solenoid valve has good sealing performance. On the one hand, sealing rings or sealing gaskets are provided between the main structural components of the valve body, resulting in good sealing performance of the valve body. On the other hand, the solenoid valve has good opening and closing sealing performance because of the matching design of the short-stroke spring and the thick iron core. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 For this utility model Figure 1 sectional view of

[0014] Figure 3 It is a schematic diagram of the explosion structure of the utility model;

[0015] Figure 4 It is a structural schematic diagram of the valve seat position of the utility model.

[0016] As shown in the figure: 1 - coil body, 101 - through cavity, 2 - valve seat, 201 - inner cavity, 202 - water outlet, 3 - middle connector, 301 - platform, 302 - fixing ear, 303 - recess, 304 - cylinder, 4 - short-range spring, 5 - iron core, 501 - butt, 5011 - connecting rod, 5012 - plug, 6 - plug cap, 7 - sealing ring, 8 - sealing gasket. DETAILED DESCRIPTION

[0017] In order to more intuitively and completely understand the technical solution of the utility model, the following non-limiting feature description is now provided in conjunction with the accompanying drawings of the utility model:

[0018] like Figure 1 — Figure 4As shown, a solenoid valve comprises a coil body 1 which generates magnetism after being energized and a valve seat 2, wherein a through cavity 101 is opened downward in the middle of the coil body 1, and the valve seat 2 has an inner cavity 201 opened upward, the inner cavity 201 communicates with the inlet and outlet at both ends of the valve seat 2, the through cavity 101 is located above the middle of the inner cavity 201 port, the lower part of the coil body 1 is connected to a middle connector 3, the middle part of the middle connector 3 is through, the lower part of the middle connector 3 is inserted into the inner cavity 201 of the valve seat 2, and the coil body 1, the middle connector 3 and the valve seat 2 are fixed by screws; a short-range spring 4 and an iron core 5 are placed in sequence downward in the through cavity 101, the short-range spring 4 is sleeved on the upper part of the iron core 5, a blocking cap 6 is sleeved on the lower part of the iron core 5, the diameter of the middle part of the iron core 5 is larger than the diameter of the upper and lower ends thereof (forming a thick iron core), and the lower part of the iron core 5 is provided with a cap which can be sleeved on the upper inner part of the blocking cap 6 The abutment 501 of the cavity, the upper part of the abutment 501 is a connecting rod 5011, the lower part of the connecting rod is a plug 5012 with a diameter larger than the connecting rod 5011, and the lower end surface of the blocking cap 6 blocks the water opening 202 in the inner cavity 201 of the valve seat 2; the short-range spring 4 has good telescopic performance and is not easy to cause mechanical damage, and the iron core 5 is as thick as possible under the condition of limited accommodation volume, which can ensure a better magnetic attraction reaction, and the elastic force of the short-range spring 4 can be adaptively designed according to the iron core 5, that is to say, the elastic force of the short-range spring 4 can push the iron core 5 downward faster, and the iron core 5 can be quickly absorbed and lifted when the solenoid valve is energized, thus forming a set of short-range spring 4 with little damage, sensitive response and durable opening and closing structure design, and there is no need to worry about problems with the opening and closing of the solenoid valve after long-term use.

[0019] The structure of the middle connector 3 can be designed as follows: the upper part of the middle connector 3 has a square platform 301, the four corners of the platform 301 are fixing ears 302 with through holes, the lower part of the middle connector 3 is a cylinder 304, the cylinder 304 is inserted into the inner cavity 201 of the valve seat 2 and fits with the inner cavity wall of the valve seat 2, the lower part of the fixing ear 302 is docked and fits with the screw holes set around the inner cavity 201 of the valve seat 2, and the upper part of the fixing ear 302 fits with the screw holes at the lower part of the coil body 1, and the coil body 1, the middle connector 3 and the valve seat 2 form a fixed connection structure by using screws passing through the screw holes and the fixing ears 302.

[0020] The specific structure of the water port is: the water port 202 is located in the middle of the inner cavity 201 and opens toward the upper part of the inner cavity 201. The water port 202 is connected to the inlet and outlet on one side of the valve seat 2, which is also the position blocked by the blocking cap 6.

[0021] Considering the sealing performance of the solenoid valve: a notch 303 is provided at the upper end of the middle connecting piece 3, and a sealing ring 7 is built in the notch 303; a sealing gasket 8 is provided at the bottom of the inner cavity 201 of the valve seat 2, and the upper part of the sealing gasket 8 is abutted against the bottom end of the cylinder 304 at the lower part of the middle connecting piece 3.

[0022] The iron core 5 is sleeved in the through passage in the middle of the middle connector 3. This design ensures that the iron core 5 has a smooth telescopic passage. In addition to being used to connect the coil body 1 and the valve seat 2, the middle connector 3 is more for the sealing of the valve body and exists as a track member adapted to the movement of the iron core 5.

[0023] The design advantage of the short-range spring 4 in combination with the thick iron core of the utility model is that the short-range spring 4 can reduce the telescopic distance to avoid mechanical damage, and the thick iron core can be better magnetized and lifted. When the elastic force of the short-range spring 4 and the weight of the iron core 5 are adjusted to the optimal state, they can exert excellent opening and closing performance. This performance is long-lasting and effective, and will not show obvious loss due to prolonged use; in addition, the rising and falling stroke of the iron core 5 is also controlled within a reasonable range, further reducing the pressure on the short-range spring 4; the sealing performance between the solenoid valve structures is good, and a sealing ring or sealing gasket is provided at the joint position.

[0024] Of course, the above are only preferred embodiments of the present invention, and the patent scope of the present invention is not limited thereto. All simple modifications and equivalent structural changes made using the description and drawings of the present invention should be included in the patent protection scope of the present invention.

Claims

1. A solenoid valve, comprising a coil body that generates magnetism when energized and a valve seat, wherein a through cavity is opened downward in the middle of the coil body, and the valve seat has an inner cavity opened upward, the inner cavity connects the inlet and outlet at both ends of the valve seat, and the through cavity is located above the middle of the inner cavity port, characterized in that: The lower part of the coil body is connected to a middle connector, the middle part of the middle connector is through, and the lower part of the middle connector is inserted into the inner cavity of the valve seat. The coil body, the middle connector and the valve seat are fixed with screws; the short-range spring and the iron core are placed in sequence with the through cavity facing downward, the short-range spring is sleeved on the upper part of the iron core, and a blocking cap is sleeved on the lower part of the iron core. The diameter of the middle part of the iron core is larger than the diameters of its upper and lower ends. The lower part of the iron core is provided with an abutment head which can be sleeved on the inner cavity of the upper part of the blocking cap. The upper part of the abutment head is a connecting rod, and the lower part of the connecting rod is a plug head with a diameter larger than the connecting rod. The lower end face of the blocking cap blocks the water outlet in the inner cavity of the valve seat.

2. A solenoid valve according to claim 1, characterized in that: The upper part of the middle connector has a square platform, and the four corners of the platform are fixing ears with through holes. The lower part of the middle connector is a cylinder, which is inserted into the inner cavity of the valve seat and fits with the inner cavity wall of the valve seat. The lower part of the fixing ear is docked and fits with the screw holes set around the inner cavity of the valve seat, and the upper part of the fixing ear fits with the screw holes at the bottom of the coil body. The coil body, the middle connector and the valve seat form a fixed connection structure by using screws to pass through the screw holes and the fixing ears.

3. The solenoid valve according to claim 1, characterized in that: The water through port is located in the middle of the inner cavity and opens toward the upper part of the inner cavity, and the water through port is connected with the inlet and outlet on one side of the valve seat.

4. A solenoid valve according to claim 1 or 2, characterized in that: An upper port which penetrates through the middle of the middle connecting piece is provided with a notch, and a sealing ring is built in the notch.

5. The solenoid valve according to claim 2, characterized in that: The bottom of the inner cavity of the valve seat is provided with a sealing pad, and the upper part of the sealing pad is abutted by the bottom end of the cylinder at the lower part of the middle connecting piece.

6. The solenoid valve according to claim 1, characterized in that: The iron core is sleeved in a channel that passes through the middle part of the middle connecting piece.

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