A bistable solenoid valve

Abstract

The utility model discloses a bistable electromagnetic valve, including the valve body and the casing of setting up the import and export and covering on the valve body, install the core axle of axially movable in the casing, the lower end of core axle is connected with the sealing assembly of inducting into the valve body and can block the import and export intercommunication, the sleeve joint of core axle has the electromagnetic coil and permanent magnet, the top of core axle is connected with handle, and the electromagnetic coil and permanent magnet do not contact each other and set up along the axial direction, and the electromagnetic coil electric connection has remote control circuit and current positive and negative control circuit, can remote control the current of electromagnetic coil generation positive direction through remote control circuit and current positive and negative control circuit, thereby produce the magnetic force of mutual attraction or repulsion with permanent magnet, like this can reach the purpose of operating core axle up and down, thereby realize the purpose of remote control this electromagnetic valve switch, and also can control this electromagnetic valve switch through pulling and pressing handle, like this realized the purpose of manual and electric control this electromagnetic valve, realized the control function of bistable.

Description

Technical Field

[0001] This utility model relates to the field of gas solenoid valve technology, and in particular to a bistable solenoid valve that can be operated electrically or manually. Background Technology

[0002] To ensure the safe use of gas, people install gas concentration detectors indoors and connect emergency shut-off valves to gas pipelines. When the gas concentration detector detects that the indoor gas concentration exceeds the set value, it will issue an alarm and control the emergency shut-off valve to close immediately to prevent gas from continuing to leak out.

[0003] An electromagnetic gas shut-off valve is an electromagnetic shut-off valve with a self-learning function installed after a gas meter. It monitors the pressure and temperature of the gas pipeline at the installation location through temperature and pressure sensors. When the pressure and temperature exceed the set threshold and change threshold, it uploads the information.

[0004] Chinese patent CN101839362A discloses a normally closed semi-automatic gas emergency shut-off solenoid valve. This solenoid valve includes an electromagnetic coil assembly, a valve cover assembly, a valve body, and a valve handle assembly. The electromagnetic coil assembly and the valve cover assembly are interlocked but detachable. The valve cover assembly is screwed to the inlet chamber of the valve body, and the valve handle assembly is installed in the outlet chamber of the valve body. The valve handle assembly is tightly connected to a retaining ring, which is screwed to a spindle. A flat sealing diaphragm is fitted onto the lower protrusion of the retaining ring, and a spring is fitted onto the outer circumference of the spindle. The electromagnetic coil assembly contains a circuit board and a coil frame. The circuit board has a charging capacitor, and a coil is wound around the coil frame. The valve cover assembly contains a permanent magnet and an internal iron core. When the solenoid valve is energized, the capacitor is charged. When the solenoid valve is de-energized, the capacitor releases electrical energy, causing the coil to work and generate an electromagnetic field with the opposite polarity to the permanent magnetic field, weakening the magnetic force of the permanent magnetic field. This causes the spring to push the spindle and retaining ring to move, closing the valve. The advantages of this invention are that the electromagnetic coil is separated from the permanent magnet, making it easy to replace the electromagnetic coil; it has low power consumption; it automatically closes the valve when power is off and can only be opened manually, and automatically recovers after power is restored; and it improves safety.

[0005] However, the solenoid coil of this solenoid valve is set horizontally around the permanent magnet. The magnetic force generated by the solenoid coil can only resist the magnetic force of the permanent magnet and cannot act on the movement of the spindle. Therefore, the valve can only be opened manually by pulling up the handle when the power is cut off. The operator must be on site to pull up the handle. However, the operator may not be stationed next to the solenoid valve at all times. If a more urgent situation occurs, the valve cannot be opened in time, resulting in losses.

[0006] Therefore, those skilled in the art are dedicated to developing a bistable solenoid valve that can be switched on and off electrically or manually. Summary of the Invention

[0007] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by this utility model is to develop a bistable solenoid valve that can be operated electrically or manually.

[0008] To achieve the above objectives, this utility model provides a bistable solenoid valve, comprising a valve body with an inlet and an outlet, and a housing covering the valve body. An axially movable spindle is installed inside the housing. The lower end of the spindle is connected to a sealing assembly that extends into the valve body and can block the communication between the inlet and the outlet. An electromagnetic coil and a permanent magnet are sleeved on the spindle. A handle is connected to the top end of the spindle. The electromagnetic coil and the permanent magnet do not contact each other and are arranged along the axial direction. The electromagnetic coil is electrically connected to a remote control circuit and a current forward and reverse rotation control circuit.

[0009] Furthermore, the remote control circuit includes a signal connector, which is connected to a wired or wireless remote control device, and pins 5 and 6 of the signal connector are grounded respectively; the current forward and reverse control circuit includes a first field-effect transistor, a second field-effect transistor, a third field-effect transistor, a first optocoupler, a second optocoupler, and a rectifier bridge; Furthermore, pins 1, 2, and 3 of the first field-effect transistor are connected to a power supply; pins 5, 6, 7, 8, and 9 of the first field-effect transistor are connected to one end of a second fuse; pin 4 of the first field-effect transistor is connected to one end of a sixth resistor, the other end of which is connected to pin 4 of the first optocoupler and one end of a fourth resistor, the other end of which is connected to a power supply; pin 3 of the first field-effect transistor is connected to one end of an eighth resistor and one end of a twelfth resistor, the other end of which is grounded; the other end of which is connected to pin 2 of the third field-effect transistor; pin 1 of the first optocoupler is connected to a 5-volt power supply; pin 2 of the first optocoupler is connected to one end of an eleventh resistor, the other end of which is connected to the collector of a fourth transistor, the emitter of which is grounded; the base of the fourth transistor is connected to one end of a fourteenth resistor, the other end of which is connected to pin 1 of the signal connector; Furthermore, pins 5, 6, 7, 8, and 9 of the second field-effect transistor are connected to pins 7 and 8 of the third field-effect transistor. Pins 1, 2, and 3 of the second field-effect transistor are connected to a power supply. Pin 4 of the second field-effect transistor is connected to one end of a seventh resistor. The other end of the seventh resistor is connected to one end of a fifth resistor. The other end of the fifth resistor is connected to a power supply. The other end of the seventh resistor and one end of the fifth resistor are also connected to pin 4 of the second optocoupler. Pin 3 of the second optocoupler is connected to one end of a ninth resistor and one end of a tenth resistor. The other end of the ninth resistor is connected to pin 4 of the third field-effect transistor. The other end of the tenth resistor is grounded. Pin 1 of the second optocoupler is connected to a 5-volt power supply. Pin 2 of the second optocoupler is connected to one end of a thirteenth resistor. The other end of the thirteenth resistor is connected to the collector of a fifth transistor. The emitter of the fifth transistor is grounded. The base of the fifth transistor is connected to one end of a fifteenth resistor. The other end of the fifteenth resistor is connected to pin 2 of the signal connector. Furthermore, the rectifier bridge is composed of a third, fourth, fifth, and sixth Zener diode. The cathodes of the third and fourth Zener diodes are connected to the power supply. The anodes of the third and fifth Zener diodes are connected to pins 5 and 6 of the third MOSFET. The anodes of the fourth and sixth Zener diodes are also connected to pins 5 and 6 of the third MOSFET. Furthermore, the electromagnetic coil is wound on a coil frame, which is fitted onto the upper end of the mandrel.

[0010] Furthermore, the lower end of the coil frame is provided with an isolation ring extending radially outward, and the permanent magnet is located below the isolation ring.

[0011] Furthermore, the sealing assembly includes a valve plate extending into the valve body at the bottom end of the mandrel, and a sealing membrane is embedded in the bottom of the valve plate.

[0012] Furthermore, a sealing ring is fitted onto the lower end of the mandrel located below the permanent magnet.

[0013] Furthermore, the sealing rings are provided in at least two arranged vertically.

[0014] Furthermore, a protective cover is threaded onto the housing and fitted onto the handle.

[0015] The beneficial effects of this utility model are as follows: The bistable solenoid valve of this utility model includes a valve body with an inlet and an outlet, and a housing covering the valve body. An axially movable spindle is installed inside the housing. The lower end of the spindle is connected to a sealing component that extends into the valve body and can block the connection between the inlet and outlet. An electromagnetic coil and a permanent magnet are sleeved on the spindle. A handle is connected to the top end of the spindle. The electromagnetic coil and the permanent magnet do not contact each other and are arranged in the axial direction. The electromagnetic coil is electrically connected to a remote control circuit and a current forward and reverse rotation control circuit. Through the remote control circuit and the current forward and reverse rotation control circuit, the electromagnetic coil can be remotely controlled to generate a positive current, thereby generating a magnetic force that attracts or repels the permanent magnet. This achieves the purpose of controlling the spindle to move up and down, thereby realizing the purpose of remotely controlling the opening and closing of this solenoid valve. At the same time, pulling or pressing the handle can also control the opening and closing of this solenoid valve. This achieves the purpose of manual and electric control of this solenoid valve, realizes the bistable control function, and avoids the need for the operator to be stationed next to the solenoid valve at all times, saving time and effort. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 yes Figure 1 Structural cross-sectional view at point AA; Figure 3 This is a partial circuit diagram of the remote control circuit; Figure 4 This is one of the circuit diagrams for the current forward and reverse rotation control circuit; Figure 5 This is part of the circuit diagram for the current forward and reverse rotation control circuit; Figure 6 This is part three of the circuit diagrams for the current forward and reverse rotation control circuit; Figure 7 This is the fourth part of the circuit diagram for the current forward and reverse rotation control circuit. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific manner. Therefore, they should not be construed as limitations on the present invention. Terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] like Figures 1 to 7As shown, a bistable solenoid valve includes a valve body 3 with an inlet 1 and an outlet 2, and a housing 4 covering the valve body 3. An axially movable spindle 5 is installed inside the housing 4. The lower end of the spindle 5 is connected to a sealing assembly that extends into the valve body 3 and blocks the connection between the inlet and outlet. An electromagnetic coil 6 and a permanent magnet 7 are sleeved on the spindle 5. A handle 8 is connected to the top end of the spindle 5. The electromagnetic coil 6 and the permanent magnet 7 are not in contact with each other and are arranged axially. The electromagnetic coil is electrically connected to a remote control circuit and a current forward / reverse control circuit. Through the remote control circuit and the current forward / reverse control circuit, the electromagnetic coil can be remotely controlled to generate currents in opposite directions, thereby generating magnetic forces that attract or repel the permanent magnet. This allows for the up-and-down movement of the spindle, achieving remote control of the solenoid valve's on / off state. Simultaneously, pulling or pressing the handle also controls the solenoid valve's on / off state, thus achieving both manual and electric control of the solenoid valve. This provides bistable control functionality, eliminating the need for operators to constantly monitor the solenoid valve, saving time and effort.

[0019] In this embodiment, refer to Figures 3 to 7 The remote control circuit includes a signal connector FPC1, which is connected to a wired or wireless remote control device. Pins 5 and 6 of the signal connector FPC1 are grounded. The current forward and reverse control circuit includes a first field-effect transistor Q1, a second field-effect transistor Q2, a third field-effect transistor Q3, a first optocoupler U3, a second optocoupler U4, and a rectifier bridge.

[0020] Pins 1, 2, and 3 of the first field-effect transistor Q1 are connected to a power supply. Pins 5, 6, 7, 8, and 9 of the first field-effect transistor Q1 are connected to one end of a second fuse F2. Pin 4 of the first field-effect transistor Q1 is connected to one end of a sixth resistor R6. The other end of the sixth resistor R6 is connected to pin 4 of the first optocoupler U3 and one end of a fourth resistor R4. The other end of the fourth resistor R4 is connected to a power supply. Pin 3 of the first field-effect transistor Q1 is connected to one end of an eighth resistor R8 and one end of a twelfth resistor R12. The other end of the twelfth resistor R12 is grounded, and the other end of the eighth resistor R8 is connected to pin 2 of the third field-effect transistor Q3; pin 1 of the first optocoupler U3 is connected to a 5-volt power supply, pin 2 of the first optocoupler U3 is connected to one end of an eleventh resistor R11, the other end of the eleventh resistor R11 is connected to the collector of a fourth transistor Q4, the emitter of the fourth transistor Q4 is grounded, the base of the fourth transistor Q4 is connected to one end of a fourteenth resistor R14, and the other end of the fourteenth resistor R14 is connected to pin 1 of the signal connector FPC1.

[0021] Pins 5, 6, 7, 8, and 9 of the second field-effect transistor Q2 are connected to pins 7 and 8 of the third field-effect transistor Q3. Pins 1, 2, and 3 of the second field-effect transistor Q2 are connected to the power supply. Pin 4 of the second field-effect transistor Q2 is connected to one end of a seventh resistor R7. The other end of the seventh resistor R7 is connected to one end of a fifth resistor R5. The other end of the fifth resistor R5 is connected to the power supply. The other end of the seventh resistor R7 and one end of the fifth resistor R5 are also connected to pin 4 of the second optocoupler U4. Pin 3 of the second optocoupler U4 is connected to one end of a ninth resistor R9. One end of the tenth resistor R10 is connected to the first pin of the second optocoupler U4. The other end of the ninth resistor R9 is connected to the fourth pin of the third field-effect transistor Q3. The other end of the tenth resistor R10 is grounded. The first pin of the second optocoupler U4 is connected to the 5V power supply terminal. The second pin of the second optocoupler U4 is connected to one end of the thirteenth resistor R13. The other end of the thirteenth resistor R13 is connected to the collector of the fifth transistor Q5. The emitter of the fifth transistor Q5 is grounded. The base of the fifth transistor Q5 is connected to one end of the fifteenth resistor R15. The other end of the fifteenth resistor R15 is connected to the second pin of the signal connector FPC1.

[0022] The rectifier bridge is composed of a third Zener diode D3, a fourth Zener diode D4, a fifth Zener diode D5, and a sixth Zener diode D6. The cathodes of the third Zener diode D3 and the fourth Zener diode D4 are connected to the power supply. The anodes of the third Zener diode D3 and the cathodes of the fifth Zener diode D5 are connected to pins 5 and 6 of the third MOSFET Q3. The anodes of the fourth Zener diode D4 and the cathodes of the sixth Zener diode D6 are connected to pins 5 and 6 of the third MOSFET Q3.

[0023] After receiving the forward or reverse signal from the signal connector FPC1, the aforementioned current forward and reverse control circuit controls the forward or reverse flow of the current, thereby controlling the electromagnetic coil 6 to generate a magnetic field that is the same as or opposite to that of the permanent magnet 7.

[0024] Furthermore, the electromagnetic coil 6 is wound around a coil frame 9, which is fitted onto the upper end of the mandrel 5. A radially outwardly extending isolation ring 10 is provided at the lower end of the coil frame 9, and the permanent magnet 7 is located below the isolation ring 10. The structure is simple, and the isolation ring 10 provides insulation.

[0025] The sealing assembly includes a valve disc baffle 11 extending into the valve body 3 connected to the bottom end of the spindle 5, and a sealing membrane 12 embedded in the bottom of the valve disc baffle 11; a sealing ring 13 is also sleeved on the lower end of the spindle 5 below the permanent magnet 7; at least two sealing rings 13 are provided, arranged vertically, with a simple structure and good sealing effect.

[0026] The housing 4 is also threaded with a protective cover 14 that is fitted onto the handle 8. The protective cover provides a certain degree of protection for the handle and the components below it.

[0027] Finally, it should be noted that in the description of this invention, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0028] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bistable solenoid valve, comprising a valve body (3) having an inlet (1) and an outlet (2) and a housing (4) covering the valve body (3), wherein an axially movable spindle (5) is installed inside the housing (4), the lower end of the spindle (5) is connected to a sealing assembly extending into the valve body (3) and capable of blocking the communication between the inlet and the outlet, an electromagnetic coil (6) and a permanent magnet (7) are sleeved on the spindle (5), and a handle (8) is connected to the top end of the spindle (5), characterized in that: The electromagnetic coil (6) and the permanent magnet (7) are not in contact with each other and are arranged along the axial direction. The electromagnetic coil is electrically connected to a remote control circuit and a current forward and reverse rotation control circuit.

2. The bistable solenoid valve according to claim 1, characterized in that: The remote control circuit includes a signal connector (FPC1) to which a wired or wireless remote control device is connected, and pins 5 and 6 of the signal connector (FPC1) are grounded respectively; the current forward and reverse control circuit includes a first field-effect transistor (Q1), a second field-effect transistor (Q2), a third field-effect transistor (Q3), a first optocoupler (U3), a second optocoupler (U4), and a rectifier bridge; Pins 1, 2, and 3 of the first field-effect transistor (Q1) are connected to a power supply. Pins 5, 6, 7, 8, and 9 of the first field-effect transistor (Q1) are connected to one end of a second fuse (F2). Pin 4 of the first field-effect transistor (Q1) is connected to one end of a sixth resistor (R6). The other end of the sixth resistor (R6) is connected to pin 4 of the first optocoupler (U3) and one end of a fourth resistor (R4). The other end of the fourth resistor (R4) is connected to a power supply. Pin 3 of the first field-effect transistor (Q1) is connected to one end of an eighth resistor (R8) and one end of a twelfth resistor (R12). The other end of the second resistor (R12) is grounded, and the other end of the eighth resistor (R8) is connected to pin 2 of the third field-effect transistor (Q3); pin 1 of the first optocoupler (U3) is connected to a 5-volt power supply, pin 2 of the first optocoupler (U3) is connected to one end of an eleventh resistor (R11), the other end of the eleventh resistor (R11) is connected to the collector of a fourth transistor (Q4), the emitter of the fourth transistor (Q4) is grounded, the base of the fourth transistor (Q4) is connected to one end of a fourteenth resistor (R14), and the other end of the fourteenth resistor (R14) is connected to pin 1 of the signal connector (FPC1); Pins 5, 6, 7, 8, and 9 of the second field-effect transistor (Q2) are connected to pins 7 and 8 of the third field-effect transistor (Q3). Pins 1, 2, and 3 of the second field-effect transistor (Q2) are connected to the power supply. Pin 4 of the second field-effect transistor (Q2) is connected to one end of a seventh resistor (R7). The other end of the seventh resistor (R7) is connected to one end of a fifth resistor (R5). The other end of the fifth resistor (R5) is connected to the power supply. The other end of the seventh resistor (R7) and one end of the fifth resistor (R5) are also connected to pin 4 of the second optocoupler (U4). Pin 3 of the second optocoupler (U4) is connected to one end of a ninth resistor (R9). One end of the tenth resistor (R10) is connected to the tenth resistor, and the other end of the ninth resistor (R9) is connected to the fourth pin of the third field-effect transistor (Q3). The other end of the tenth resistor (R10) is grounded. The first pin of the second optocoupler (U4) is connected to the 5V power supply terminal. The second pin of the second optocoupler (U4) is connected to one end of the thirteenth resistor (R13). The other end of the thirteenth resistor (R13) is connected to the collector of the fifth transistor (Q5). The emitter of the fifth transistor (Q5) is grounded. The base of the fifth transistor (Q5) is connected to one end of the fifteenth resistor (R15). The other end of the fifteenth resistor (R15) is connected to the second pin of the signal connector (FPC1). The rectifier bridge is composed of a third Zener diode (D3), a fourth Zener diode (D4), a fifth Zener diode (D5), and a sixth Zener diode (D6). The cathodes of the third Zener diode (D3) and the fourth Zener diode (D4) are connected to the power supply. The anode of the third Zener diode (D3) and the cathode of the fifth Zener diode (D5) are connected to pins 5 and 6 of the third field-effect transistor (Q3). The anode of the fourth Zener diode (D4) and the cathode of the sixth Zener diode (D6) are connected to pins 5 and 6 of the third field-effect transistor (Q3).

3. The bistable solenoid valve according to claim 1, characterized in that: The electromagnetic coil (6) is wound on a coil frame (9), which is fitted onto the upper end of the mandrel (5).

4. The bistable solenoid valve according to claim 3, characterized in that: The lower end of the coil frame (9) is provided with an isolation ring (10) extending radially outward, and the permanent magnet (7) is located below the isolation ring (10).

5. The bistable solenoid valve according to claim 1, characterized in that: The sealing assembly includes a valve plate (11) extending into the valve body (3) at the bottom end of the spindle (5), and a sealing membrane (12) is embedded in the bottom of the valve plate (11).

6. The bistable solenoid valve according to claim 1, characterized in that: A sealing ring (13) is also fitted onto the lower end of the mandrel (5) located below the permanent magnet (7).

7. The bistable solenoid valve according to claim 6, characterized in that: The sealing ring (13) has at least two arranged vertically.

8. The bistable solenoid valve according to claim 1, characterized in that: The housing (4) is also threaded with a protective cover (14) that is fitted onto the handle (8).

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