Precise electromagnetic valve applying disc type electromagnet principle

Abstract

The utility model discloses a precise electromagnetic valve applying a disc type electromagnet principle, which comprises a lower shell, soft iron arranged in the lower shell, a coil arranged in the soft iron, a rubber-coated iron sheet covered on the soft iron, an upper shell buckled and mounted on the lower shell, and a wiring terminal arranged on the upper shell and used for being connected with the coil, an air inlet is formed in the center of the lower shell, an air outlet is formed in the side wall of the lower shell, a first air channel communicated with the air inlet is formed in the center of the soft iron, a second air channel corresponding to the air outlet is formed between the soft iron and the rubber-coated iron sheet, and the rubber-coated iron sheet can elastically fit and block the first air channel. The first air channel communicated with the air inlet and the air outlet is formed in the center of the soft iron, the second air channel gap communicated with the air outlet is formed between the rubber-coated iron sheet and the soft iron, and therefore the circulation air channel is formed, magnetic attraction force can be generated when the coil is powered on, the rubber-coated iron sheet is attracted and attached to the soft iron to block the first air inlet channel, and the circulation air channel is closed; the valve effect is realized.

Description

Technical field:

[0001] The utility model relates to the technical field of control valves, in particular to a precision electromagnetic valve using the principle of a disc-type electromagnet. Background technology:

[0002] A solenoid valve is an automated device that controls the flow of liquids or gases through electromagnetic force. It is widely used in industrial and household appliances, medical devices, and automobiles. It rapidly opens and closes the valve by energizing or de-energizing the electromagnetic coil, thereby precisely regulating the flow direction and volume of the fluid. Due to their fast response, simple structure, and precise control, solenoid valves play a vital role in modern automation systems.

[0003] The solenoid type solenoid valve is the most common one. The solenoid type solenoid valve drives the valve core through the electromagnetic force generated by an electromagnetic coil (i.e., a solenoid), quickly and accurately realizing the opening or closing of the valve, thereby regulating the flow and direction of the fluid. For example: a solenoid valve and its iron core assembly with the Chinese patent authorization announcement number CN 219198295 U. In the technical solution disclosed in the patent, when the valve is opened: the coil 19 is energized, and the moving iron core 13 moves upward (moves in the direction of opening the valve) under the action of the electromagnetic force. Since the connecting rod 15 and the moving iron core 13 can move relative to each other at this time, and the sealing plug 14 has not moved, the moving iron core 13 only needs to overcome its own weight and the elastic force of the iron core spring 12. It has nothing to do with the water pressure, and the required magnetic force is relatively small; when the moving iron core 13 moves to the first limiting protrusion 151 of the connecting rod 15 and presses against the limiting guide sleeve 161, as shown Figure 3 As shown, the moving iron core 13 starts to drive the connecting rod 15 to move upward, thereby driving the sealing plug 14 to move upward. At this time, the moving iron core 13 has moved a distance closer to the static iron core 11, and the distance between the moving iron core 13 and the static iron core 11 is reduced. The magnetic force on the moving iron core 13 increases. Even if the water pressure increases, the connecting rod 15 can be pulled to move the sealing plug 14 upward and away from the hole to be sealed 21 until the valve is completely opened. Figure 2 As shown, the valve opening is less affected by the fluid pressure, there is no need to shorten the stroke of the moving iron core 13, the switch valve performance is stable and reliable, and there is no need to increase the number of turns of the coil 19, which is conducive to miniaturization and almost no increase in cost.

[0004] When closing the valve, the coil 19 is de-energized, and the moving iron core 13 moves downward under the action of its own gravity and the elastic force of the iron core spring 12, pushing the connecting rod 15 and the sealing plug 14 downward until the sealing plug 14 seals the hole 21 to be sealed. Figure 4 As shown, the valve is closed.

[0005] As mentioned above, while solenoid valves are widely used in numerous applications due to their simplicity, reliability, and ease of control, they also have inherent limitations and drawbacks. Furthermore, since most current solenoid valves utilize a flat column-shaped iron stop, these designs require a large amount of metal for magnetic restraint, which is costly. They also require a large amount of copper wire for the windings to maintain magnetic force. The procurement, assembly, and commissioning of these multiple components also increase overall system costs.

[0006] In view of this, the inventors propose the following technical solutions. Utility model content:

[0007] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a precision solenoid valve using the principle of a disc-type electromagnet.

[0008] In order to solve the above technical problems, the utility model adopts the following technical solutions: a precision solenoid valve using the principle of disc electromagnet, comprising: a lower shell, a soft iron arranged in the lower shell, a coil arranged in the soft iron, a rubber-coated iron sheet covering the soft iron, an upper shell that is snap-fitted and installed on the lower shell and limits the soft iron and the rubber-coated iron sheet, and at least two terminal blocks arranged on the upper shell and used to connect to the coil, wherein an air inlet is provided at the center of the lower shell, an air outlet is provided on the side wall of the lower shell, a first air duct connected to the air inlet is provided at the center of the soft iron, a second air duct corresponding to the air outlet is provided between the soft iron and the rubber-coated iron sheet, and the rubber-coated iron sheet can elastically fit and seal on the first air duct.

[0009] Furthermore, in the above technical solution, the rubber-coated iron sheet includes an elastic support member clamped between the lower shell and the upper shell and an iron ring sheet embedded in the elastic support member and facing the soft iron and the coil.

[0010] Furthermore, in the above technical solution, a first annular groove for mounting the coil is provided on the soft iron, the iron ring piece is opposite to the first annular groove, and the first air duct passes through the center of the middle boss of the first annular groove.

[0011] Furthermore, in the above technical solution, a ventilation notch corresponding to the second air channel is provided on the soft iron, and the ventilation notch is located between the first annular groove and the second air channel.

[0012] Furthermore, in the above technical solution, a first convex column capable of elastically pressing against the first air channel is provided in the middle of the elastic support member, and the diameter of the first convex column is larger than the diameter of the first air channel.

[0013] Furthermore, in the above technical solution, the elastic support member is provided with a second annular groove located outside the first protrusion and used to enhance the elastic force, and the elastic support member is also provided with an elastic portion located outside the iron ring piece.

[0014] Furthermore, in the above technical solution, a first sealing ring is installed in the second annular groove, a second sealing ring is provided between the bottom of the soft iron and the lower shell, and the second sealing ring is located at the periphery of the air inlet and the first air duct.

[0015] Furthermore, in the above technical solution, the elastic support member is also provided with a third annular groove for installing the iron ring sheet, the third annular groove is located between the elastic part and the second annular groove, and the elastic support member is provided with a plurality of first through holes corresponding to the third annular groove.

[0016] Furthermore, in the above technical solution, the upper shell is provided with at least two elastic snap-fitting arms for matching and snapping with the lower shell, the lower shell is provided with at least two locking blocks for matching and snapping with the elastic snap-fitting arms, and the outer wall of the lower shell is provided with a first limiting groove for the elastic snap-fitting arms to be inserted into and fixed with the locking blocks.

[0017] Furthermore, in the above technical solution, a positioning cavity for installing soft iron is provided in the lower shell, and the opening of the positioning cavity is chamfered to facilitate the installation of the soft iron.

[0018] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: the present invention adopts a method of setting a first air duct connecting the air inlet and the air outlet in the center of the soft iron, and setting the rubber-coated iron sheet to maintain a second air duct gap with the soft iron in the default state, so that in the default state the fluid can enter from the air inlet and flow out from the air outlet along the first air duct and the second air duct, and by setting a coil in the soft iron to form an electromagnetic induction coil group, when the coil is energized, it will generate magnetic attraction, which will adsorb the rubber-coated iron sheet tightly against the soft iron and block the first air inlet, so that the fluid entering the first air duct from the air inlet cannot enter the second air duct and flow out from the air outlet, thereby achieving a valve effect, and the overall structure is simple, with few parts and easy assembly, and most of the parts can be made of plastic, which reduces the use of traditional metal and greatly reduces costs. Description of the drawings:

[0019] Figure 1 It is a three-dimensional diagram of the utility model;

[0020] Figure 2 It is the internal structure diagram of the utility model;

[0021] Figure 3 This is the decomposition of the utility model Figure 1 ;

[0022] Figure 4 This is the decomposition of the utility model Figure 2 . Specific implementation method:

[0023] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0024] See Figures 1 to 4 As shown, a precision solenoid valve using the disc electromagnet principle is provided, which includes: a lower shell 1, a soft iron 2 arranged in the lower shell 1, a coil 8 arranged in the soft iron 2, a rubber-coated iron sheet 3 covering the soft iron 2, an upper shell 4 that is snap-fitted and installed on the lower shell 1 and limits and fixes the soft iron 2 and the rubber-coated iron sheet 3, and at least two terminal blocks 5 arranged on the upper shell 4 and used to connect to the coil 8, wherein an air inlet 11 is provided at the center of the lower shell 1, an air outlet 12 is provided on the side wall of the lower shell 1, a first air duct 21 connected to the air inlet 11 is provided at the center of the soft iron 2, a second air duct 22 corresponding to the air outlet 12 is provided between the soft iron 2 and the rubber-coated iron sheet 3, and the rubber-coated iron sheet 3 can be elastically fitted and sealed on the first air duct 21. A first air duct 21 connecting the air inlet 11 and the air outlet 12 is set in the center of the soft iron 2, and the rubber-coated iron sheet 3 is set to a default state to maintain a gap between the second air duct 2 and the soft iron 2, so that in the default state, the fluid can enter from the air inlet 11 along the first air duct 21 and the second air duct 22 and out of the air outlet 12. By setting a coil 8 in the soft iron 2 to form an electromagnetic induction coil group, when the coil 8 is energized, magnetic attraction will be generated, which will adsorb the rubber-coated iron sheet 3 against the soft iron 2 and block the first air inlet 21, so that the fluid entering the first air duct 21 from the air inlet 11 cannot enter the second air duct 22 and flow out of the air outlet 12, thereby achieving a valve effect. The overall structure is simple, with few parts and easy assembly. Most of the parts can be made of plastic, which reduces the use of traditional metal and greatly reduces costs.

[0025] The rubber-coated iron sheet 3 comprises an elastic support member 31 clamped between the lower housing 1 and the upper housing 4, and an iron ring 32 embedded in the elastic support member 31 and facing the soft iron 2 and coil 8. The iron ring 32 is made of ferritic stainless steel and is molded and wrapped around the elastic support member 31 to form a single unit. The coil 8 is copper wire, wound using hot-dip enameled wire, and bonded to the soft iron 3 using adhesive.

[0026] The middle portion of the elastic support member 31 is provided with a first protrusion 311 that can elastically press against the first air channel 21, and the diameter of the first protrusion 311 is larger than the diameter of the first air channel 21. The elastic support member 31 is provided with a second annular groove 312 located on the periphery of the first protrusion 311 and used to increase the elastic force. The elastic support member 31 is also provided with an elastic portion 313 located on the periphery of the iron ring piece 32. By providing the elastic portion 313 on the elastic support member 31, the iron ring piece 32 embedded in the elastic support member 31 can float under force, and the middle portion of the elastic support member 331 is provided with a first protrusion 311 that can block the first air channel 21, so that after the iron ring piece 32 receives the magnetic attraction force, it can float toward the direction of force, and drive the first protrusion 311 to press close to the center of the soft iron 2 to block the first air channel 21, thereby disconnecting the first air channel 21 from the second air channel 22. Secondly, by adding a second annular groove 312 on the periphery of the first convex column 311 , the floating elastic force of the first convex column 311 is increased, which facilitates the first column 311 to deform and bulge relative to the elastic support member 31 .

[0027] The elastic support member 31 is further provided with a third annular groove 314 for mounting the iron ring piece 32. The third annular groove 314 is located between the elastic portion 313 and the second annular groove 312. The elastic support member 31 is provided with a plurality of first through holes 315 corresponding to the third annular grooves 314. The first through holes 315 are provided to facilitate the passage of the lead wires of the coil 8 for connection to the terminal 5. Of course, to ensure smooth passage of the lead wires, the iron ring piece 32 is provided with second through holes corresponding to the first through holes 315.

[0028] A first sealing ring 6 is installed in the second annular groove 312, and a second sealing ring 7 is provided between the bottom of the soft iron 2 and the lower housing 1, and the second sealing ring 7 is located outside the air inlet 11 and the first air passage 21. By adding the first sealing ring 6 in the second annular groove 312, and with the end surface of the first sealing ring 6 slightly protruding from the first protrusion 311, when the iron ring 32 is subjected to force and drives the first protrusion 311 toward the soft iron 2, the first sealing ring 6 will adhere to the soft iron 2 and be located outside the first air passage 21 before the soft iron 2, and the elastic deformation of the first sealing ring 6 will further enhance the sealing effect of the first air passage 21. A second sealing ring 7 is provided between the bottom of the soft iron 2 and the lower shell 1, so that after the soft iron 2 is installed in the positioning cavity 10 of the lower shell 1, the gap between the soft iron 2 and the inner wall of the positioning cavity 10 can be sealed to prevent the fluid from flowing directly from the gap between the soft iron 2 and the lower shell 1 into the second air channel 22, thereby ensuring the control effect of the valve body. Of course, in order to ensure the sealing effect between the soft iron 2 and the lower shell 1, an installation ring groove for installing the second sealing ring 7 is provided on the outer periphery of the bottom of the positioning cavity 10.

[0029] The soft iron 2 is pinned in a special mountain shape and is provided with a first annular groove 23 for mounting the coil 8. The iron ring 32 is aligned with the first annular groove 23, and the first air passage 21 passes through the center of the boss in the middle of the first annular groove 23. The soft iron 2 is provided with a ventilation notch 24 corresponding to the second air passage 22, and the ventilation notch 24 is located between the first annular groove 23 and the second air passage 22. By providing the ventilation notch 24 on the outer wall of the soft iron 2, the ventilation notch 24 is directly connected to the first annular groove 23 and the air outlet 12, thereby significantly increasing the cross-sectional area of ​​the passage between the second air passage 22 and the air outlet 12 and ensuring the flow efficiency of the fluid.

[0030] The upper shell 4 is provided with at least two elastic snap-fitting arms 41 for matching and snapping with the lower shell 1, the lower shell 1 is provided with at least two locking blocks 13 for matching and snapping with the elastic snap-fitting arms 41, and the outer wall of the lower shell 1 is provided with a first limiting groove 14 for the elastic snap-fitting arms 41 to be inserted into and fixed with the locking blocks 13.

[0031] The lower housing 1 is provided with a positioning cavity 10 for mounting the soft iron 2. The opening of the positioning cavity 10 is chamfered to facilitate the installation of the soft iron 2. The soft iron 2 is bonded to the positioning cavity 10 by adhesive to form a whole.

[0032] The terminal block 5 is a square terminal. The upper shell 4 and the terminal block 5 are pressed together using a device. The rubber-coated iron sheet 3 is installed in the lower shell 1, and then the upper shell 4 and the lower shell 1 are assembled and snapped together. After completion, the leads of the coil 8 are respectively wound and fixed with the terminal block 5 and the excess leads are cut off. The wound terminal block 5 is dipped in a tin furnace to complete the welding.

[0033] To sum up, the working principle of the present invention is: the terminal 5 is connected to the power supply, and the coil 8 connected to it is energized to generate magnetic force and magnetize the soft iron 2. The strong magnetic force will attract the iron ring piece 32 on the rubber-coated iron sheet 3, causing the entire rubber-coated iron sheet 3 to move and fit together with the soft iron 2. The arc-shaped glue position (elastic part 313) of the rubber-coated iron sheet 3 is deformed and displaced, and the center position glue position (second annular groove 312) also deforms and bulges in the opposite direction to press the center hole (first air duct 21) of the soft iron 2. At this time, the air path in the direction of the air nozzle (air inlet 11) of the lower shell 1 is closed. When the power supply of the terminal 5 is cut off, the magnetic force of the coil 8 disappears, and the force that attracts the rubber-coated iron sheet 3 no longer exists. The arc-shaped rubber part (elastic part 313) of the rubber-coated iron sheet 3 rebounds to its original position, the entire rubber-coated iron sheet 3 is pulled open, the central hole (first air channel 21) of the soft iron 2 is opened, and the air path in the direction of the air nozzle (air inlet 11) of the lower shell 1 is opened.

[0034] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. Any equivalent changes or modifications made based on the structure, features and principles described in the scope of the patent application of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A precision solenoid valve using the disc electromagnet principle, characterized in that: include: A lower shell (1), a soft iron (2) arranged in the lower shell (1), a coil (8) arranged in the soft iron (2), a rubber-coated iron sheet (3) covering the soft iron (2), an upper shell (4) fastened and mounted on the lower shell (1) and limiting and fixing the soft iron (2) and the rubber-coated iron sheet (3), and at least two connection terminals (5) arranged on the upper shell (4) and used for connecting to the coil (8), wherein an air inlet (11) is provided at the center of the lower shell (1), an air outlet (12) is provided on the side wall of the lower shell (1), a first air duct (21) connected to the air inlet (11) is provided at the center of the soft iron (2), a second air duct (22) corresponding to the air outlet (12) is provided between the soft iron (2) and the rubber-coated iron sheet (3), and the rubber-coated iron sheet (3) can be elastically fitted and sealed on the first air duct (21).

2. A precision solenoid valve using the disc electromagnet principle according to claim 1, characterized in that: The rubber-coated iron sheet (3) comprises an elastic support member (31) clamped between the lower shell (1) and the upper shell (4) and an iron ring sheet (32) embedded in the elastic support member (31) and facing the soft iron (2) and the coil (8).

3. A precision solenoid valve using the disc electromagnet principle according to claim 2, characterized in that: The soft iron (2) is provided with a first annular groove (23) for mounting the coil (8), the iron ring piece (32) is directly opposite to the first annular groove (23), and the first air channel (21) passes through the center of the middle boss of the first annular groove (23).

4. A precision solenoid valve using the disc electromagnet principle according to claim 3, characterized in that: The soft iron (2) is provided with a ventilation notch (24) corresponding to the second air channel (22), and the ventilation notch (24) is located between the first annular groove (23) and the second air channel (22).

5. The precision solenoid valve using the disc electromagnet principle according to claim 2, characterized in that: A first convex column (311) capable of elastically pressing against the first air channel (21) is provided in the middle of the elastic support member (31), and the diameter of the first convex column (311) is larger than the diameter of the first air channel (21).

6. The precision solenoid valve using the disc electromagnet principle according to claim 5, characterized in that: The elastic support member (31) is provided with a second annular groove (312) located on the periphery of the first convex column (311) and used to enhance elastic force. The elastic support member (31) is also provided with an elastic portion (313) located on the periphery of the iron ring piece (32).

7. The precision solenoid valve using the disc electromagnet principle according to claim 6, characterized in that: A first sealing ring (6) is installed in the second annular groove (312), a second sealing ring (7) is provided between the bottom of the soft iron (2) and the lower shell (1), and the second sealing ring (7) is located on the periphery of the air inlet (11) and the first air duct (21).

8. The precision solenoid valve using the disc electromagnet principle according to claim 6, characterized in that: The elastic support member (31) is also provided with a third annular groove (314) for mounting the iron ring sheet (32), the third annular groove (314) being located between the elastic portion (313) and the second annular groove (312), and the elastic support member (31) is provided with a plurality of first through holes (315) corresponding to the third annular groove (314).

9. A precision solenoid valve using the disc electromagnet principle according to any one of claims 1 to 8, characterized in that: The upper shell (4) is provided with at least two elastic buckling arms (41) for matching and buckling with the lower shell (1), the lower shell (1) is provided with at least two locking blocks (13) for matching and buckling with the elastic buckling arms (41), and the outer wall of the lower shell (1) is provided with a first limiting groove (14) for the elastic buckling arms (41) to be inserted into and fixed with the locking blocks (13).

10. The precision solenoid valve using the disc electromagnet principle according to claim 9, characterized in that: A positioning cavity (10) for installing the soft iron (2) is provided in the lower shell (1), and an opening of the positioning cavity (10) is chamfered to facilitate the installation of the soft iron (2).

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