CN214466466U - Electromagnetic valve - Google Patents

Abstract

The utility model provides an electromagnetic valve, which relates to the technical field of thermal power generation. The solenoid valve includes a solenoid valve body, a micro switch and an alarm. The solenoid valve body includes a casing, an electromagnet and a transmission assembly. The electromagnet and the transmission assembly are both installed in the casing; the micro switch includes a first contact foot and a second contact The first contact pin is movably connected in the housing, the second contact pin is fixedly connected in the housing, the first contact pin and the second contact pin include a contact path state and a disconnection state, when the electromagnet is powered off, the first contact pin It is one of the state of being in contact with the second contact pin and the state of being disconnected from the open circuit; when the electromagnet is energized, the first contact pin and the second contact pin are in the state of contacting the channel and the other state of being disconnected from the open circuit; the alarm is connected to Micro Switch. The micro switch and the alarm in the solenoid valve form an independent circuit, the detection effect of the on-off state of the solenoid valve body is good, and the operation reliability of the solenoid valve body can be improved.

Description

Electromagnetic valve

Technical Field

The utility model relates to a thermal power technology field particularly, relates to a solenoid valve.

Background

Generally adopt 2 position 3 circular telegram solenoid valves in the control of the steam turbine extraction check valve of thermal power factory to need all live working in service, if high, the low pressure heater liquid level that the extraction check valve corresponds is high, just need close the extraction check valve immediately, prevent that the water of the high liquid level of heater from getting into the steam turbine through the check valve pipeline and leading to the steam turbine to intake, perhaps need close the extraction check valve immediately when the steam turbine is overspeed, make the steam turbine overspeed more serious when preventing the extraction refluence. Therefore, real-time monitoring of the electrified condition of the electromagnetic valve of the steam extraction check valve is required in anti-accident measures, and an alarm signal is timely sent out when the electromagnetic valve is not electrified so as to remind a worker to carry out troubleshooting. In the prior art, a relay is connected in series in a solenoid valve power supply circuit to monitor a solenoid valve power supply, although the method is simple, a relay coil circuit is connected into the solenoid valve circuit, new fault points are added, and the circuit is more unreliable.

That is, the detection effect of the current-carrying state of the solenoid valve in the related art is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a solenoid valve to solve among the prior art to the poor technical problem of solenoid valve on state's detection effect.

In order to solve the problems, the utility model provides a solenoid valve, which comprises a solenoid valve body, a micro switch and an alarm, wherein the solenoid valve body comprises a shell, an electromagnet and a transmission assembly, and the electromagnet and the transmission assembly are both arranged in the shell; the micro switch comprises a first contact pin and a second contact pin, the first contact pin is movably connected in the shell, the second contact pin is fixedly connected in the shell, the first contact pin and the second contact pin comprise a contact on state and a disconnection off state, and when the electromagnet is powered off, the first contact pin and the second contact pin are in one of the contact on state and the disconnection off state; when the electromagnet is electrified, the first contact pin and the second contact pin are in the other one of the contact on state and the disconnection off state; the alarm is connected with the microswitch.

Optionally, the micro switch further comprises a hinge arm, a first end of the hinge arm is hinged to the housing, and a second end of the hinge arm is fixedly connected with the first contact pin; an elastic piece is connected between the hinged arm and the shell, the elastic piece exerts an elastic acting force F1 on the hinged arm, the acting force exerted on the first contact pin when the electromagnet is powered on is F2, and the direction of F1 is opposite to that of F2.

Optionally, the micro-gap switch still includes base and bracing piece, the base set firmly in the shell, the bracing piece rigid coupling in the base just moves towards the iron core of electro-magnet extends, the first end of articulated arm articulate in the bracing piece, the elastic component connect in the articulated arm with between the base.

Optionally, the microswitch is located between the iron core and the transmission assembly, the first contact pin is located between the iron core and the second contact pin, and when the electromagnet is in a power-on state, the first contact pin and the second contact pin are in a disconnection state; when the electromagnet is in a power-off state, the first contact pin and the second contact pin are in a contact access state;

or the second contact pin is positioned between the iron core and the first contact pin, and when the electromagnet is in a power-on state, the first contact pin and the second contact pin are in a contact access state; when the electromagnet is in a power-off state, the first contact pin and the second contact pin are in a disconnection state.

Optionally, the microswitch is located on a side of the iron core away from the transmission assembly, the first contact pin is located between the iron core and the second contact pin, and when the electromagnet is in a power-on state, the first contact pin and the second contact pin are in a disconnection state; when the electromagnet is in a power-off state, the first contact pin and the second contact pin are in a contact access state;

or the second contact pin is positioned between the iron core and the first contact pin, and when the electromagnet is in a power-on state, the first contact pin and the second contact pin are in a contact access state; when the electromagnet is in a power-off state, the first contact pin and the second contact pin are in a disconnection state.

Optionally, the first contact pin, the second contact pin, the alarm and the power supply are connected in series through a wire to form a loop.

Optionally, the solenoid valve further comprises a controller, the first contact pin and the second contact pin are electrically connected with the controller, and the controller is electrically connected with the alarm.

Optionally, a mounting rack is fixedly connected in the housing, and the base is fixedly connected to the mounting rack; the transmission assembly comprises a fixing seat, a magnetic suction block fixedly connected with the fixing seat and a driving rod fixedly connected with the fixing seat, a reset piece is connected between the mounting frame and the fixing seat, and the reset piece is used for driving the fixing seat to deviate from the iron core to move.

Optionally, the housing includes a first housing and a second housing, the electromagnet and the microswitch are both mounted to the first housing, the transmission assembly is located in the first housing, and the driving rod extends into the second housing.

Optionally, the first housing is fixedly connected with a wire guide cylinder, and the wire guide cylinder is used for a wire to pass through.

The utility model provides a solenoid valve packs into independent operation's micro-gap switch in the shell of solenoid valve body, and micro-gap switch and alarm form independent return circuit, and micro-gap switch's on-state and the corresponding change of the on-state of solenoid valve to carry out real-time detection to the on-state of solenoid valve, and send out the police dispatch newspaper through the alarm, make maintainer can discover the trouble in time and handle, in order to eliminate the potential safety hazard; this setting need not to increase new component in the return circuit of solenoid valve body, and new fault point can not produce in the return circuit of solenoid valve body correspondingly to reduce the influence to solenoid valve body normal operating, thereby improve the reliability of solenoid valve body operation, and reduce workman's maintenance volume, and should set up simple structure, with low costs.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic view of a first structure of a solenoid valve provided by the present invention;

FIG. 2 is a schematic diagram of the micro switch of FIG. 1 with a first contact pin and a second contact pin disconnected from each other;

FIG. 3 is a schematic diagram illustrating a first contact pin and a second contact pin of the micro switch shown in FIG. 1 in a contact state;

fig. 4 is a second schematic structural diagram of the electromagnetic valve provided by the present invention;

fig. 5 is a schematic view of a third structure of the electromagnetic valve provided by the present invention;

fig. 6 is a fourth schematic structural diagram of the electromagnetic valve provided by the present invention.

Description of reference numerals:

110-a housing; 111-a first housing; 112-a second housing; 113-a wire guide cylinder; 120-an electromagnet; 121-coil; 122-iron core; 130-a transmission assembly; 131-a fixed seat; 132-a magnetic attraction block; 133-a drive rod; 134-a reset piece; 140-a mounting frame; 200-a microswitch; 210-a first contact pin; 220-a second contact pin; 230-an articulated arm; 240-support rods; 250-a base; 260-an elastic member; 300-an alarm; 400-power supply.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The embodiment provides a solenoid valve, as shown in fig. 1, which comprises a solenoid valve body, a microswitch 200 and an alarm 300, wherein the solenoid valve body comprises a shell 110, an electromagnet 120 and a transmission assembly 130, and the electromagnet 120 and the transmission assembly 130 are both installed in the shell 110; the micro switch 200 includes a first contact pin 210 and a second contact pin 220, the first contact pin 210 is movably connected in the housing 110, the second contact pin 220 is fixedly connected in the housing 110, the first contact pin 210 and the second contact pin 220 include a contact on state and a disconnection off state, when the electromagnet 120 is powered off, the first contact pin 210 and the second contact pin 220 are in one of the contact on state and the disconnection off state; when the electromagnet 120 is powered on, the first contact pin 210 and the second contact pin 220 are in the other one of a contact on state and a disconnection off state; the alarm 300 is connected to the microswitch 200.

The solenoid valve provided by the embodiment comprises a solenoid valve body for controlling the on-off state or the one-way and two-way circulation state of a pipeline, a microswitch 200 for detecting the power-on state of the solenoid valve body and an alarm 300 for sending an alarm signal according to the state of the microswitch 200. When the electromagnetic valve is used, the electromagnetic valve is arranged on a steam transmission pipeline of a steam turbine and is in a power-on state, and the electromagnet 120 attracts the transmission assembly 130 to drive the valve core to be in an open state; accordingly, the electromagnet 120 attracts the first contact pin 210 to move toward the iron core 122, the first contact pin 210 and the second contact pin 220 are in one of a contact on state and a disconnection off state, and the alarm 300 is in a first state at this time, and the first state represents that the solenoid valve is in a normal power-on state; when the solenoid valve trouble cuts off the power supply, the electro-magnet 120 no longer attracts first contact pin 210 to move towards iron core 122, and first contact pin 210 is another kind in contact path state and the breaking away from the off-circuit state with second contact pin 220, and alarm 300 is the second state this moment, and the second state sign solenoid valve is in the trouble outage state, and operating personnel can discern the operating condition of solenoid valve according to alarm 300's state to in time carry out fault handling to the solenoid valve, in order to eliminate the potential safety hazard.

According to the electromagnetic valve, the microswitch 200 which operates independently is arranged in the shell 110 of the electromagnetic valve body, the microswitch 200 and the alarm 300 form an independent loop, and the connection state of the microswitch 200 and the power-on state of the electromagnetic valve are changed correspondingly, so that the power-on state of the electromagnetic valve is detected in real time, and an alarm is sent out through the alarm 300, so that a maintainer can find out faults in time and process the faults, and potential safety hazards are eliminated; this setting need not to increase new component in the return circuit of solenoid valve body, and new fault point can not produce in the return circuit of solenoid valve body correspondingly to reduce the influence to solenoid valve body normal operating, thereby improve the reliability of solenoid valve body operation, and reduce workman's maintenance volume, and should set up simple structure, with low costs.

Specifically, the electromagnetic valve may be a steam extraction check valve, or may be a two-way flow switch valve.

Optionally, in this embodiment, the micro switch 200 may further include an articulated arm 230, a first end of the articulated arm 230 is articulated to the outer shell 110, and a second end of the articulated arm 230 is fixedly connected to the first contact pin 210; an elastic piece 260 is connected between the hinge arm 230 and the housing 110, the elastic piece 260 applies an elastic force F1 to the hinge arm 230, the electromagnet 120 applies a force F2 to the first contact pin 210 when being powered, and the force F1 is opposite to the direction of F2. In a specific form of the movable connection between the first contact pin 210 and the housing 110, when the electromagnet 120 is in the power-off state, the elastic element 260 applies a force to the hinge arm 230 in a direction away from the iron core 122, so as to correspondingly drive the hinge arm 230 to rotate away from the iron core 122, the hinge arm 230 drives the first contact pin 210 to rotate to the first position, at this time, the first contact pin 210 and the second contact pin 220 are in one of a contact access state and a disconnection state, and the alarm 300 is correspondingly in the first state, which represents that the solenoid valve body is in the normal power-on state; when the electromagnet 120 is powered on, the electromagnet 120 applies an acting force F2 towards the direction of the iron core 122 to the first contact pin 210, the acting force F2 can overcome an elastic acting force F1 of the elastic piece 260, and the first contact pin 210 and the hinge arm 230 are attracted to rotate towards the direction of the iron core 122, at this time, the first contact pin 210 and the second contact pin 220 are in another one of a contact access state and a disconnection state, the alarm 300 is correspondingly in a second state, the fact that the electromagnetic valve body is in a fault power-off state is represented, the operation can identify the working state of the electromagnetic valve according to the state of the alarm 300, and therefore fault processing is performed on the electromagnetic valve in time, and potential safety hazards are eliminated.

Specifically, in this embodiment, as shown in fig. 1 to 3, the micro switch 200 may further include a base 250 and a supporting rod 240, the base 250 is fixedly disposed in the housing 110, the supporting rod 240 is fixedly connected to the base 250 and extends toward the iron core 122 of the electromagnet 120, the first end of the hinge arm 230 is hinged to the supporting rod 240, and the elastic element 260 is connected between the hinge arm 230 and the base 250. In this embodiment, the micro switch 200 is a specific form of the micro switch, the hinge arm 230 is hinged to the housing 110 through the support rod 240 and the base 250, the elastic member 260 is connected to the housing 110 through the base 250, and the elastic member 260 and the electromagnet 120 drive the hinge arm 230 to rotate around the hinge, so as to change the connection state of the first contact pin 210 and the second contact pin 220, and accordingly change the state of the alarm 300, so that the operator can timely identify and process faults.

Specifically, in the embodiment, as shown in fig. 1, the micro switch 200 is located between the iron core 122 and the transmission assembly 130, the first contact pin 210 is located between the iron core 122 and the second contact pin 220, and when the electromagnet 120 is in the power-on state, the first contact pin 210 and the second contact pin 220 are in the disconnection state; when the electromagnet 120 is in the power-off state, the first contact pin 210 and the second contact pin 220 are in a contact and passage state. Based on the view of fig. 1, when the solenoid valve body fails due to power failure, the elastic element 260 applies a downward elastic force F1 to the hinge arm 230, as shown in fig. 3, the first contact pin 210 moves downward to contact with the second contact pin 220, and a loop formed by the two contacts is in a contact path state, and the alarm 300 is correspondingly in a first state, which represents that the solenoid valve body is in a failure power failure state; when the solenoid valve body is normally energized, the electromagnet 120 applies an upward acting force F2 to the first contact pin 210, and F2 is greater than F1, the first contact pin 210 and the hinge arm 230 rotate upward under the combined action of F1 and F2, as shown in fig. 2, the first contact pin 210 is separated from the second contact pin 220, a loop formed by the two is separated from an open circuit state, the alarm 300 is correspondingly in a second state, and the second state represents that the solenoid valve body is in a normal energized state. Specifically, base 250 may be positioned below articulating arm 230 as shown in fig. 1, with spring 260 in an extended state, applying a downward pulling force on articulating arm 230; alternatively, base 250 may be positioned above articulating arm 230, with spring 260 in a compressed state, applying a downward pushing force to articulating arm 230.

When the micro switch 200 is located between the iron core 122 and the transmission assembly 130, the second contact pin 220 may also be located between the iron core 122 and the first contact pin 210, and when the electromagnet 120 is in the power-on state, the first contact pin 210 and the second contact pin 220 are in a contact passage state; when the electromagnet 120 is in the power-off state, the first contact pin 210 and the second contact pin 220 are in the off-state. Based on the view angle of fig. 4, when the solenoid valve body fails due to power failure, the elastic member 260 applies a downward elastic acting force F1 to the hinge arm 230, the first contact pin 210 moves downward to be separated from the second contact pin 220, a loop formed by the two contact pins is in a disconnected state, and the state of the alarm 300 correspondingly indicates that the solenoid valve body is in a failed power failure state; when the solenoid valve body is normally electrified, the electromagnet 120 applies upward acting force F2 to the first contact pin 210, and F2 is greater than F1, the first contact pin 210 and the hinge arm 230 rotate upward under the combined action of F1 and F2, the first contact pin 210 is abutted against the second contact pin 220, a loop formed by the first contact pin 210 and the second contact pin 220 is in a contact access state, and the state of the alarm 300 represents that the solenoid valve body is in a normal electrified state. Specifically, base 250 may be positioned below articulating arm 230 as shown in fig. 4, with spring 260 in an extended state, applying a downward pulling force on articulating arm 230; alternatively, base 250 may be positioned above articulating arm 230, with spring 260 in a compressed state, applying a downward pushing force to articulating arm 230.

When the microswitch 200 is positioned between the iron core 122 and the transmission assembly 130, the space between the iron core 122 and the transmission assembly 130 can be fully utilized, so that the compactness of the electromagnetic valve is improved, and the increase of the setting of the microswitch 200 to the whole volume of the electromagnetic valve is reduced. Specifically, when the micro switch 200 is located between the iron core 122 and the transmission assembly 130, the micro switch 200 is located in the coil 121 of the electromagnet 120, and at this time, the second contact pin 220 may be directly mounted on the coil 121.

In addition to the micro switch 200 being located between the iron core 122 and the transmission assembly 130, in this embodiment, as shown in fig. 5, the micro switch 200 may also be located on a side of the iron core 122 away from the transmission assembly 130, the first contact pin 210 is located between the iron core 122 and the second contact pin 220, and when the electromagnet 120 is in a power-on state, the first contact pin 210 and the second contact pin 220 are in a disconnection state; when the electromagnet 120 is in the power-off state, the first contact pin 210 and the second contact pin 220 are in a contact and passage state. Based on the view angle of fig. 5, when the solenoid valve body fails in a power-off state, the elastic member 260 applies an upward elastic acting force F1 to the hinge arm 230, the first contact pin 210 moves upward to contact with the second contact pin 220, a loop formed by the two contact pins is in a contact passage state, and the state of the alarm 300 represents that the solenoid valve body is in a normal power-on state; when the solenoid valve body is normally electrified, the electromagnet 120 applies downward acting force F2 to the first contact pin 210, and F2 is greater than F1, the first contact pin 210 and the hinge arm 230 rotate downward under the combined action of F1 and F2, the first contact pin 210 is separated from the second contact pin 220 downward, a loop formed by the first contact pin 210 and the second contact pin 220 is separated from an open circuit state, and the state of the alarm 300 correspondingly represents that the solenoid valve body is in a fault power-off state. Specifically, base 250 may be positioned above articulating arm 230 as shown in FIG. 5, with spring 260 in a compressed state, applying a downward pushing force to articulating arm 230; alternatively, base 250 may be positioned below articulating arm 230, with spring 260 in an extended state, applying a downward pulling force to articulating arm 230.

In addition, when the micro switch 200 is located on a side of the iron core 122 away from the transmission assembly 130, as shown in fig. 6, the second contact pin 220 may also be located between the iron core 122 and the first contact pin 210, and when the electromagnet 120 is in the power-on state, the first contact pin 210 and the second contact pin 220 are in a contact passage state; when the electromagnet 120 is in the power-off state, the first contact pin 210 and the second contact pin 220 are in the off-state. Based on the view angle of fig. 6, when the solenoid valve body fails due to power failure, the elastic member 260 applies an upward elastic acting force F1 to the hinge arm 230, the first contact pin 210 moves upward to be separated from the second contact pin 220, a loop formed by the two contact pins is in a separated open-circuit state, and the state of the alarm 300 correspondingly indicates that the solenoid valve body is in a failed power-off state; when the solenoid valve body is normally electrified, the electromagnet 120 applies downward acting force F2 to the first contact pin 210, and F2 is greater than F1, the first contact pin 210 and the hinge arm 230 rotate downward under the combined action of F1 and F2, the first contact pin 210 is abutted with the second contact pin 220 downward, a loop formed by the first contact pin 210 and the second contact pin 220 is in a contact access state, and the state of the alarm 300 represents that the solenoid valve body is in a normal electrified state. Specifically, base 250 may be positioned below articulating arm 230 as shown in fig. 6, with spring 260 in an extended state, applying a downward pulling force on articulating arm 230; alternatively, base 250 may be positioned above articulating arm 230, with spring 260 in a compressed state, applying a downward pushing force to articulating arm 230.

Alternatively, in this embodiment, as shown in fig. 1, the first contact pin 210, the second contact pin 220, the alarm 300 and the power supply 400 may be connected in series through wires to form a loop. Here is a specific form of connection between the alarm 300 and the microswitch 200, specifically, the alarm 300 may use a bulb to perform light alarm, a buzzer to perform sound alarm, or a bulb and a buzzer to perform sound and light alarm, taking the bulb as an example for explanation, when the first contact pin 210 is in contact with the second contact pin 220, the loop is in a closed state, and the bulb is correspondingly lighted; when first contact pin 210 and second contact pin 220 break away from, the return circuit is the open circuit state, and the bulb is corresponding to be extinguish, and operating personnel can judge the on-off state of solenoid valve body according to the bright state of extinguishing of bulb, and the operating condition of corresponding judgement solenoid valve to in time carry out fault handling to it, improve the security of steam turbine and thermal power unit operation.

Optionally, in this embodiment, the electromagnetic valve may further include a controller, and the first contact pin 210 and the second contact pin 220 are electrically connected to the controller, and the controller is electrically connected to the alarm 300. Here, the alarm 300 is connected with the microswitch 200 through a controller, when the first contact pin 210 is contacted with the second contact pin 220, the controller receives a contact path signal and correspondingly controls the alarm 300 to be in a first state; when the first contact pin 210 is separated from the second contact pin 220, the controller receives the separation disconnection signal, and accordingly controls the alarm 300 to be in the second state. Specifically, the alarm 300 may be an acoustic alarm, an optical alarm, or an audible and visual alarm, and the controller may be connected to the host to alarm via a display screen of the host.

In this embodiment, as shown in fig. 1, a mounting frame 140 is fixedly connected to the housing 110, and a base 250 is fixedly connected to the mounting frame 140; the transmission assembly 130 includes a fixing base 131, a magnetic attraction block 132 fixedly connected to the fixing base 131, and a driving rod 133 fixedly connected to the fixing base 131, a reset element 134 is connected between the mounting frame 140 and the fixing base 131, and the reset element 134 is used for driving the fixing base 131 to move away from the iron core 122. Rigid coupling mounting bracket 140 in shell 110, micro-gap switch 200's base 250 rigid coupling in mounting bracket 140, transmission assembly 130's fixing base 131 connects in mounting bracket 140 through piece 134 that resets, mounting bracket 140 realizes the installation to a plurality of parts as the mount pad, on the basis of guaranteeing each parts normal operating, reduce the destruction that a plurality of parts all led to the fact shell 110 leakproofness and intensity with shell 110 lug connection, thereby guarantee shell 110's fastness and the guard action to its inside each part. Wherein, the electromagnet 120 applies acting force to the magnetic attraction piece of the transmission assembly 130 to drive the transmission assembly 130 to move towards the iron core 122; the reset piece 134 drives the transmission assembly 130 to move away from the iron core 122 through the fixed seat 131, so that the blocking state of the valve core on the internal channel of the solenoid valve body is changed; of course, in other embodiments, the transmission assembly 130 may be arranged in other forms according to actual needs.

In this embodiment, the first contact pin 210 and the housing 110 are movably connected in the hinge manner, and can be slidably connected to the housing 110, and the sliding direction of the first contact pin 210 faces or deviates from the iron core 122, and the first contact pin 210 can face or deviate from the iron core 122 under the combined action of the reset piece 134 and the iron core 122, so that the contact state with the second contact pin 220 is changed, and the on-off state of the electromagnet 120 body is detected.

In this embodiment, as shown in fig. 1, the housing 110 may include a first housing 111 and a second housing 112, the electromagnet 120 and the microswitch 200 are both mounted on the first housing 111, the transmission assembly 130 is located on the first housing 111, and the driving rod 133 extends into the second housing 112. The shell 110 is divided into a first shell 111 and a second shell 112, wherein the valve core is installed in the second shell 112, and the electromagnetic valve, the transmission assembly 130, the micro switch 200 and the like are installed in the first shell 111, so that the processing convenience of the shell 110 and the assembling convenience of each component can be effectively improved, and the practicability of the electromagnetic valve is improved.

In this embodiment, as shown in fig. 1, a wire guiding barrel 113 is fixed to the first housing 111, and the wire guiding barrel 113 is used for a wire to pass through. The lead connected with the power supply 400 and the coil 121 in the electromagnet 120, the lead connected with the first contact pin 210 and the second contact pin 220 can penetrate out of the first shell 111 through the lead cylinder 113, and the lead cylinder 113 limits and guides the penetrating lead, so that the regularity and the concentration of the penetrating lead are improved; preferably, the wire barrel 113 may be integrally formed with the first housing 111.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The electromagnetic valve is characterized by comprising an electromagnetic valve body, a microswitch (200) and an alarm (300), wherein the electromagnetic valve body comprises a shell (110), an electromagnet (120) and a transmission assembly (130), and the electromagnet (120) and the transmission assembly (130) are both arranged in the shell (110); the microswitch (200) comprises a first contact pin (210) and a second contact pin (220), the first contact pin (210) is movably connected in the shell (110), the second contact pin (220) is fixedly connected in the shell (110), the first contact pin (210) and the second contact pin (220) comprise a contact on-circuit state and a disconnection off-circuit state, and when the electromagnet (120) is powered off, the first contact pin (210) and the second contact pin (220) are in one of the contact on-circuit state and the disconnection off-circuit state; when the electromagnet (120) is electrified, the first contact pin (210) and the second contact pin (220) are in the other one of the contact on state and the disconnection off state; the alarm (300) is connected to the microswitch (200).

2. The solenoid valve according to claim 1, characterized in that said microswitch (200) further comprises an articulated arm (230), a first end of said articulated arm (230) being hinged to said housing (110), a second end of said articulated arm (230) being solidly connected to said first contact pin (210); an elastic piece (260) is connected between the hinged arm (230) and the shell (110), the elastic force exerted by the elastic piece (260) on the hinged arm (230) is F1, the force exerted on the first contact pin (210) when the electromagnet (120) is electrified is F2, and the directions of F1 and F2 are opposite.

3. The solenoid valve according to claim 2, wherein the micro switch (200) further comprises a base (250) and a support rod (240), the base (250) is fixedly disposed in the housing (110), the support rod (240) is fixedly attached to the base (250) and extends toward the iron core (122) of the electromagnet (120), the first end of the hinge arm (230) is hinged to the support rod (240), and the elastic member (260) is connected between the hinge arm (230) and the base (250).

4. The solenoid valve according to claim 3, wherein the microswitch (200) is located between the iron core (122) and the transmission assembly (130), the first contact pin (210) is located between the iron core (122) and the second contact pin (220), and when the electromagnet (120) is in an energized state, the first contact pin (210) and the second contact pin (220) are in a disconnected state; when the electromagnet (120) is in a power-off state, the first contact pin (210) and the second contact pin (220) are in a contact access state;

or, the second contact pin (220) is located between the iron core (122) and the first contact pin (210), and when the electromagnet (120) is in an electrified state, the first contact pin (210) and the second contact pin (220) are in a contact passage state; when the electromagnet (120) is in a power-off state, the first contact pin (210) and the second contact pin (220) are in a disconnection state.

5. The electromagnetic valve according to claim 3, characterized in that the microswitch (200) is located on a side of the iron core (122) facing away from the transmission assembly (130), the first contact pin (210) is located between the iron core (122) and the second contact pin (220), and when the electromagnet (120) is in an energized state, the first contact pin (210) and the second contact pin (220) are in a disconnected state; when the electromagnet (120) is in a power-off state, the first contact pin (210) and the second contact pin (220) are in a contact access state;

or, the second contact pin (220) is located between the iron core (122) and the first contact pin (210), and when the electromagnet (120) is in an electrified state, the first contact pin (210) and the second contact pin (220) are in a contact passage state; when the electromagnet (120) is in a power-off state, the first contact pin (210) and the second contact pin (220) are in a disconnection state.

6. The solenoid valve according to any of claims 1-5, characterized in that the first contact pin (210), the second contact pin (220), the alarm (300) and the power supply (400) are connected in series by wires to form a loop.

7. The solenoid valve according to any one of claims 1-5, further comprising a controller, wherein the first contact pin (210) and the second contact pin (220) are electrically connected to the controller, and the controller is electrically connected to the alarm (300).

8. The solenoid valve according to any of the claims 3 to 5, characterized in that a mounting bracket (140) is fastened inside the housing (110), the base (250) being fastened to the mounting bracket (140); transmission assembly (130) include fixing base (131), rigid coupling in magnetism piece (132) and the rigid coupling of inhaling of fixing base (131) in actuating lever (133) of fixing base (131), mounting bracket (140) with be connected with between fixing base (131) and reset piece (134), reset piece (134) are used for the drive fixing base (131) deviate from iron core (122) motion.

9. The solenoid valve according to claim 8, characterized in that the housing (110) comprises a first housing (111) and a second housing (112), the electromagnet (120) and the microswitch (200) are both mounted to the first housing (111), the transmission assembly (130) is located in the first housing (111), and the driving rod (133) protrudes into the second housing (112).

10. The electromagnetic valve according to claim 9, characterized in that the first housing (111) is fixedly connected with a wire guide cylinder (113), and the wire guide cylinder (113) is used for a wire to pass through.

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