Bidirectional bistable electromagnetic valve

Abstract

The utility model relates to a bidirectional bistable electromagnetic valve, which has no limitation on the installation and use directions and has forward and reverse open-circuit self-locking and access keeping functions, an electromagnetic coil only needs to be electrified for a short time in the working state switching process, and the electromagnetic coil does not need to be continuously supplied with power in any working state. When in use, the electromagnetic valve can be used as an inflation pipeline element as well as a deflation pipeline element, so that the cost is saved, and the pipeline is simplified.

Description

Technical Field

[0001] This utility model relates to a bidirectional bistable solenoid valve. The solenoid valve has no restrictions on the direction of installation and use, and has forward and reverse circuit breaking self-locking and circuit holding functions. During the switching of working states, the solenoid coil only needs to be energized for a short time, and the solenoid coil does not need to be continuously powered under any working state. Background Technology

[0002] The basic principle of a general solenoid valve is that current flowing through the solenoid coil generates magnetic force, which drives the valve core to move, changing the solenoid valve's on / off state. To maintain the working state, the solenoid coil must be continuously energized; if the coil is de-energized, it returns to its normal state. When the coil is not energized, this type of solenoid valve can only stably maintain one state (non-working state). Furthermore, this type of solenoid valve has a working direction requirement; the solenoid valve can only work if fluid is introduced in the correct direction, otherwise the seal will not be tight. This type of solenoid valve can be called a one-way monostable solenoid valve. The main advantage of unidirectional monostable solenoid valves is their simple structure, but their disadvantages are also very obvious. These solenoid valves can only be installed in one direction, and when maintaining operation, the solenoid coil needs to be continuously energized for a long time, continuously consuming electrical energy and generating heat, which will cause the following deficiencies: First, there are restrictions on the installation direction, making it easy to install incorrectly; second, the continuous consumption of a large amount of electrical energy results in energy waste, and for mobile equipment, a larger power supply capacity is required; third, the thermal adaptability of the components is reduced, placing higher demands on heat dissipation and limiting the power of a single solenoid valve and the number of solenoid valves used per unit space; fourth, localized heating is unavoidable, accelerating component aging, reducing reliability, and shortening service life. Summary of the Invention

[0003] To address the shortcomings of the aforementioned one-way monostable solenoid valve, a two-way bistable solenoid valve is proposed. This solenoid valve has no restrictions on the fluid working direction and can be installed arbitrarily. When switching working states, the solenoid coil is briefly energized, and after the state is switched to the correct position, the coil is de-energized, and the solenoid valve can remain in either the open or closed state.

[0004] The technical solution adopted by this utility model to solve the technical problem is as follows: valve seats are provided at both ends of the valve body, and the valve core can slide left or right within the valve body. When the valve core is not fixed, under the action of fluid pressure, the valve core slides within the valve body according to the fluid flow direction and presses against the corresponding valve seat, realizing the solenoid valve's self-locking when the circuit is closed. Similarly, when the fluid flows in the opposite direction, it can also achieve reverse self-locking when the circuit is closed. When the valve core is fixed in the middle position by the locking mechanism, the solenoid valve is in the open state regardless of the direction of fluid flow. The locking mechanism has two working states: extension and retraction. It is driven by the electromagnetic positioning mechanism. Each time the electromagnetic positioning mechanism works, the locking mechanism switches its working state. When the locking mechanism is in the extension state, it fixes the valve core in the middle position; when it is in the retraction state, it releases the valve core, realizing steady-state operation of both open and closed circuits.

[0005] The beneficial effects of this invention are that it solves the problems of conventional solenoid valves, such as limited working direction leading to installation errors, continuous power supply during operation resulting in energy waste, limited power of individual solenoid valves, and rapid component aging. In use, this solenoid valve can be used as both an inflation and deflation pipeline component, which helps save costs and simplify pipeline design. Attached Figure Description

[0006] The present invention will be further described below with reference to the accompanying drawings and embodiments. Figure 1 This is an external view of the solenoid valve. Figure 2 This is an exploded view of the solenoid valve. Figure 3 This is an external view of the electromagnetic positioning mechanism. Figure 4 This is an exploded view of the electromagnetic positioning mechanism. Figure 5 This is a cross-sectional view of the electromagnetic positioning mechanism. Figure 6 This is an external view of the locking mechanism. Figure 7 This is a diagram showing the working state of the locking mechanism. Figure 8 This is a drawing of the valve body parts. Figure 9 This is a drawing of the valve core component. Figures 10 to 16 This is a schematic diagram illustrating the working principle of the solenoid valve. The components in the diagram are labeled as follows: 1. Valve body, 2. Valve core, 3. Right end cover, 4. Electromagnetic positioning mechanism, 5. Left end cover, 6. Locking mechanism, 7. Hall sensor, 400. Positioning slider, 401. Mounting block, 402. Electromagnetic coil, 403. Return spring, 404. Armature, 405. Guide tube, 406. Locking nut, 600. Lock core, 601. Outer shell, 201. Core, 202. Slider, 203. Circular hole, 204. Rectangular hole, 205. Sealing gasket. Detailed Implementation

[0007] For ease of explanation, we will use gas as the working medium for the solenoid valve. Figure 1 This is a perspective view of a specific embodiment of the bidirectional bistable solenoid valve of this utility model, its composition is as follows: Figure 2 As shown, the solenoid valve consists of a valve body 1, a valve core 2, a right end cover 3, an electromagnetic positioning mechanism 4, a left end cover 5, a locking mechanism 6, and a Hall sensor 7. The valve core 2 is installed inside the valve body 1 via a slider 202. The left end cover 5 and the right end cover 3 are respectively installed at the left and right ends of the valve body 1. The electromagnetic positioning mechanism 4 is installed at the lower part of the valve body 1, the locking mechanism 6 is installed at the upper part of the valve body 1, and the Hall sensor 7 is installed on the locking mechanism 6.

[0008] Valve body 1 structure as follows Figure 8As shown, the overall shape is rectangular with a circular through hole in the middle. Symmetrical rectangular slots are formed on both sides of the through hole to engage with the slider 202 on the valve core 2, allowing the valve core 2 to slide only within the rectangular slots of the valve body 1 and preventing circumferential rotation. The valve body 1 has one opening and four screw holes at the top and bottom for installing the locking mechanism 6 and the electromagnetic positioning mechanism 4. Four screw holes are formed at the left and right ends of the valve body for installing the left end cap 5 and the right end cap 3.

[0009] The structure of valve core 2 is as follows Figure 9 As shown, the core 201 is a cylinder with rubber sealing gaskets 205 installed at both ends. The sealing gaskets 205 are used to seal the air valve seats of the left end cover 5 and the right end cover 3. Slider blocks 202 are symmetrically made on both sides of the core 201, and there is a rectangular hole 204 in the middle. A circular hole 203 is opened in the middle of the rectangular hole 204. The lock cylinder 600 can slide in the circular hole 203, and the positioning slider 400 can slide in the rectangular hole 204.

[0010] The left end cap 5 has a threaded interface on the left side for connecting to an external air circuit, and an air circuit valve seat on the right side. The right end cap 3 has a threaded interface on the right side for connecting to an external air circuit, and an air circuit valve seat on the left side.

[0011] The electromagnetic positioning mechanism 4 has the following shape: Figure 3 As shown, its structural composition is as follows Figure 4 As shown, it includes a positioning slider 400, a mounting block 401, an electromagnetic coil 402, a return spring 403, an armature 404, a guide tube 405, and a locking nut 406. The positioning slider 400 has a rectangular base at its front end, with chamfered corners on both sides to form sharp angles. A cylinder is welded to its rear end, and a screw hole is formed at the rear of the cylinder. The mounting block 401 has a rectangular hole at its front end that mates with the shape of the front end of the positioning slider 400. A circular hole is formed in the middle of the rectangular hole, which mates with the cylindrical rear end of the positioning slider 400. The mounting block 401 also has a circular hole at its rear end, with a step in the middle (see...). Figure 5 The return spring 403 is used to limit the movement of the return hole, and the round hole has an internal thread. The cylindrical front end of the armature 404 has an external thread on its outer surface. The guide tube 405 is hollow at the front end and sealed at the rear end, and both the front and rear ends have external threads on their outer surfaces.

[0012] The assembly structure of the electromagnetic positioning mechanism 4 is as follows: Figure 5As shown, after the positioning slider 400 passes through the mounting block 401 from the front, a return spring 403 is installed on the rear cylindrical part. The armature 404 presses the return spring 403 and screws it into the screw hole at the rear end of the positioning slider 400. At this time, the front end of the return spring 403 presses on the step of the mounting block 401, and the rear end presses on the armature 404, which is in a pre-compression state. The guide tube 405 passes through the armature 404 and the return spring 403 and is installed in the screw hole at the rear end of the mounting block 401. The electromagnetic coil 402 is installed on the guide tube 405, and the locking nut 406 fixes the electromagnetic coil 402 on the guide tube 405. When the electromagnetic coil 402 is not energized, the return spring 403 presses the armature 404, causing the positioning slider 400 to move to the right and press against the rectangular hole at the front end of the mounting block 401. At this time, the electromagnetic positioning mechanism 4 is in its initial state. When the electromagnetic coil 402 is energized, the armature 404 moves to the left under the action of electromagnetic force, compressing the return spring 403 and driving the positioning slider 400 to move to the left. The positioning slider 400 extends, and the electromagnetic positioning mechanism 4 is in working state at this time. When the electromagnetic coil 402 is de-energized, the armature 404 loses the action of electromagnetic force, and the return spring 403 drives the armature 404 to move to the right, and drives the positioning slider 400 to move to the right, returning to the initial state.

[0013] The locking mechanism 6 works on the same principle as the wardrobe rebound mechanism, and is modified from an existing product, such as... Figure 6 As shown, the lock cylinder 600 is installed inside the housing 601. The front end of the housing 601 has four mounting holes for fixing it to the valve body 1. The working process is as follows: Figure 7 As shown, the lock cylinder 600 has two working positions, position A and position B. When the lock cylinder 600 is in position A, if an external force is applied to push the lock cylinder 600 to the right and move it a certain position, the mechanism inside the outer shell 601 will be unlocked. After the external force is released, the lock cylinder 600 will pop out to the left and stop at position B. When the lock cylinder 600 is in position B, if an external force is applied to push the lock cylinder 600 to the right to position A and continues to move it a certain position to the right, the mechanism inside the outer shell 601 will be locked. After the external force is released, the lock cylinder 600 will pop out to the left and lock at position A.

[0014] Hall sensor 7 is mounted on the housing 601 of the locking mechanism 6. Its function is to measure the position of the lock cylinder 600 and provide a status signal for the automated control of the solenoid valve. When the lock cylinder 600 is measured to be in position B, it indicates that the solenoid valve is in the open state. When the lock cylinder 600 is measured to be in position A, it indicates that the solenoid valve is in the closed state.

[0015] The following describes the specific working process of a bidirectional bistable solenoid valve. For example... Figure 10As shown, this is the air passage state. The locking mechanism 6 is in position B, and the lock core 600 is inside the circular hole 203 of the valve core 2. The valve core 2 is confined to the middle position, and the sealing gaskets 205 at both ends do not contact the air passage valve seats of the left end cover 5 and the right end cover 3. At the same time, the electromagnetic coil 402 on the electromagnetic positioning mechanism 4 is not energized, and the positioning slider 400 is in the initial state. The sharp corner of the front end of the positioning slider 400 is inside the rectangular hole 204 on the core 201 and does not contact the left or right sides of the rectangular hole 204. This solenoid valve is different from ordinary solenoid valves. It does not have a fixed air inlet direction. The two air inlets and outlets can be interchanged. The threaded interface of the left end cover 5 can be used as the air inlet and the threaded interface of the right end cover 3 as the air outlet; or the threaded interface of the right end cover 3 can be used as the air inlet and the threaded interface of the left end cover 5 as the air outlet. To facilitate the explanation of the working principle, taking the threaded interface of the left end cover 5 connected to the air intake pipe and the threaded interface of the right end cover 3 connected to the air outlet pipe as an example, when there is pressure in the air intake pipe, the airflow flows through the threaded interface of the left end cover 5, the air valve seat of the left end cover 5, the gap around the valve core 2, the air valve seat of the right end cover 3, and the threaded interface of the right end cover 3 into the air outlet pipe. At this time, no matter how the air intake pressure changes, the solenoid valve is always in a stable state of passage.

[0016] like Figure 11 As shown, when the electromagnetic coil 402 on the electromagnetic positioning mechanism 4 is energized, the positioning slider 400 extends out, and the sharp corner at its front end passes through the rectangular hole 204 on the valve core 2 and presses against the lock core 600 of the locking mechanism 6, pushing the lock core 600 to move upward beyond position A.

[0017] like Figure 12 As shown, when the electromagnetic coil 402 on the electromagnetic positioning mechanism 4 is de-energized, the positioning slider 400 retracts to its initial position under the action of the return spring 403. After the external force is lost, the locking core 600 of the locking mechanism 6 is locked in position A. At this time, the valve core 2 is no longer restricted in the axial direction. The valve core 2 can slide freely in the rectangular groove of the valve body 1 through the two sliders 202. When it slides to the leftmost or rightmost position, it is not affected by the positioning slider 400. The sealing gasket 205 on it cooperates with the air valve seat of the left end cover 5 and the right end cover 3 to achieve bidirectional circuit breaking self-locking.

[0018] like Figure 13 As shown, when the pressure in the inlet pipe is greater than the pressure in the outlet pipe, the airflow flows into the valve body 1 from the air valve seat of the left end cover 5. The pressure of the airflow acting on the left end of the valve core 2 is greater than the pressure acting on the right end of the valve core 2, pushing the valve core 2 to the right, so that the sealing gasket 205 at the right end of the valve core 2 is pressed against the air valve seat of the right end cover 3, the airflow is cut off, and the entire solenoid valve is in a positive circuit break self-locking state.

[0019] like Figure 16As shown, when the intake pipe leaks due to damage or the air source is removed, the pressure in the outlet pipe is greater than the pressure in the intake pipe. The airflow flows into the valve body 1 from the air valve seat of the right end cover 3. The pressure of the airflow acting on the right end of the valve core 2 is greater than the pressure acting on the left end of the valve core 2, pushing the valve core 2 to move to the left, so that the sealing gasket 205 at the left end of the valve core 2 is pressed against the air valve seat of the left end cover 5, the airflow is cut off, and the entire solenoid valve is in a reverse circuit breaking self-locking state.

[0020] When the solenoid valve is in the forward disconnection self-locking state (e.g.) Figure 13 (As shown), to restore the gas supply, the electromagnetic coil 402 on the electromagnetic positioning mechanism 4 is energized. Under the action of electromagnetic force, the positioning slider 400 extends, and the left inclined edge of its front end interacts with the left side of the rectangular hole 204 on the valve core 2. As the positioning slider 400 extends upward, it drives the valve core 2 to move to the left, causing the right end of the valve core 2 to separate from the air passage valve seat of the right end cover 3 (as shown). Figure 14 (As shown). The sharp corner of the positioning slider 400 abuts against the lock cylinder 600 of the locking mechanism 6, pushing the lock cylinder 600 to continue moving upward beyond position A, at which point it... Figure 11 The states shown are consistent. For example... Figure 15 As shown, when the electromagnetic coil 402 on the electromagnetic positioning mechanism 4 is de-energized, the positioning slider 400 retracts downward to its initial position under the action of the return spring 403. The locking core 600 of the locking mechanism 6 also extends and moves downward, inserting into the circular hole 203 of the valve core 2, and finally stops at position B. At this time, the valve core 2 is axially restricted to the middle position, and the air valve seats of both the left end cover 5 and the right end cover 3 are in the open state (e.g., Figure 10 As shown), the air passage reopens at this time, and the airflow flows in from the threaded interface 5 on the left end cover and flows out from the threaded interface 3 on the right end cover. At this time, the positive passage is in a stable state.

[0021] When the solenoid valve is in the reverse disconnection self-locking state (such as...) Figure 16 As shown, when venting is required via the intake pipe as a venting pipe, the electromagnetic coil 402 on the electromagnetic positioning mechanism 4 is energized. Under the action of electromagnetic force, the positioning slider 400 extends, and the right oblique edge of its front end interacts with the right side of the rectangular hole 204 on the valve core 2. As the positioning slider 400 extends upward, it drives the valve core 2 to move to the right, causing the left end of the valve core 2 to separate from the air passage valve seat of the left end cover 5. The sharp corner of the positioning slider 400 presses against the lock cylinder 600 of the locking mechanism 6, pushing the lock cylinder 600 to continue moving upward beyond the self-locking position A. At this time, it is in contact with... Figure 11 The states shown are consistent. For example... Figure 15As shown, when the electromagnetic coil 402 on the electromagnetic positioning mechanism 4 is de-energized, the positioning slider 400 retracts downward to its initial position under the action of the return spring 403. The locking core 600 of the locking mechanism 6 also extends and moves downward, inserting into the circular hole 203 of the valve core 2, and finally locking in position B. At this time, the valve core 2 is axially restricted to the middle position, and the air valve seats of both the left end cover and the right end cover 3 are in the open state (e.g., ...). Figure 10 As shown in the figure, the air passage is reopened at this time, and the airflow flows in from the threaded interface 3 on the right end cover and is discharged from the threaded interface 5 on the left end cover. At this time, the reverse passage is in a stable state, realizing the air release function.

[0022] Similarly, by connecting the threaded interface of the right end cover 3 to the air inlet pipe and the threaded interface of the left end cover 5 to the air outlet pipe, the above working process can also be achieved. That is, the solenoid valve realizes bidirectional bistable function, and the solenoid coil does not need to be continuously energized, but only briefly uses electricity during the state switching process, which saves more energy.

[0023] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A bidirectional bistable solenoid valve, characterized in that: The solenoid valve consists of a valve body (1), a valve core (2), a right end cover (3), an electromagnetic positioning mechanism (4), a left end cover (5), a locking mechanism (6), and a Hall sensor (7).

2. The bidirectional bistable solenoid valve as described in claim 1, characterized in that: The valve body (1) is rectangular in shape with a circular through hole in the middle. Rectangular grooves are symmetrically opened on the left and right sides of the through hole for cooperating with the slider (202) on the valve core (2), so that the valve core (2) can only slide in the rectangular groove of the valve body (1) and cannot rotate in the circumferential direction.

3. The bidirectional bistable solenoid valve as described in claim 1, characterized in that: The valve core (2) has a cylindrical core (201) with rubber sealing gaskets (205) installed at both ends. Sliders (202) are symmetrically made on both sides, and there is a rectangular hole (204) in the middle. A circular hole (203) is opened in the middle of the rectangular hole (204).

4. The bidirectional bistable solenoid valve as described in claim 1, characterized in that: The electromagnetic positioning mechanism (4) consists of a positioning slider (400), a mounting block (401), an electromagnetic coil (402), a return spring (403), an armature (404), a guide tube (405), and a locking nut (406).

5. The bidirectional bistable solenoid valve as described in claim 1, characterized in that: The positioning slider (400) of the electromagnetic positioning mechanism (4) has a cuboid base shape at the front end, with cuboid corners cut on the left and right sides to form sharp corners, and a cylinder welded to the rear end, with a screw hole made at the back of the cylinder.

6. The bidirectional bistable solenoid valve as described in claim 1, characterized in that: The mounting block (401) of the electromagnetic positioning mechanism (4) has a rectangular hole at the front end, which matches the shape of the front end of the positioning slider (400). A circular hole is opened in the middle of the rectangular hole, which matches the cylindrical body at the rear end of the positioning slider (400). A circular hole is opened at the rear end of the mounting block (401), with a step in the middle. The circular hole has an internal thread.

7. The bidirectional bistable solenoid valve as described in claim 1, characterized in that: A Hall sensor (7) is mounted on the housing (601) of the locking mechanism (6) to provide a status signal for the automated control of the solenoid valve.

8. The bidirectional bistable solenoid valve as described in claim 1, characterized in that: The slider (202) of the valve core (2) can slide left and right in the rectangular groove of the valve body (1) and cooperate with the air valve seat of the left end cover (5) and the right end cover (3) to achieve bidirectional air circuit disconnection and self-locking.

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