CN112963607B - Control system with double magnetic circuit sensors - Google Patents

Abstract

The invention provides a control system with a double-magnetic-circuit sensor, and belongs to the field of earthquake protection. The control system is arranged on a building, the yoke iron is fixedly connected with the building, and when an earthquake happens, the first coil and the second coil are vibrated to generate electromotive force; the memory collects and stores the electric signals and transmits the electric signals to the processor for analysis, so that data such as speed, acceleration and the like are obtained, and a reliable basis is provided for scientific research. When the earthquake intensity is high and the electromotive force of the second coil is high, the electromagnet can obtain magnetism, so that the adsorption plate moves upwards; the absorption plate further drives the lever to swing, so that the connection between the abutting block and the pulling rod is disconnected. At the moment, the pulling rod can pull the valve rod to close under the action of the first spring, so that the pipeline is cut off, and the possibility of leakage of fluid in the pipeline is reduced.

Description

Control system with double magnetic circuit sensors

Technical Field

The invention relates to the field of earthquake protection, in particular to a control system with a double-magnetic-circuit sensor.

Background

When a strong earthquake occurs, the earthquake can cause very serious damage to buildings; in such cases, if the pipeline system is damaged, it may cause leakage of fluid (e.g., natural gas), which may lead to a more serious accident. In addition, when an earthquake occurs, relevant data (such as speed and acceleration) of the earthquake, which causes the vibration of the building, also has certain research value. Therefore, a control system is provided, which can cut off the conveying pipeline and record related data when the earthquake grade is high, and the control system has important significance for scientific research and reduction of damage caused by earthquake.

Disclosure of Invention

The invention aims to provide a control system with a double-magnetic-circuit sensor, which can cut off a conveying pipeline and record relevant data when the earthquake grade is high.

The invention is realized by the following steps:

a control system with a dual magnetic circuit sensor, comprising:

the double-magnetic-circuit sensor comprises a first coil and a second coil, wherein the first coil and the second coil can generate electromotive force under the action of vibration;

the memory is connected with the first coil and used for acquiring an electric signal;

a valve for mounting on a pipe, the valve comprising a valve stem;

the control device comprises a first driving assembly, an electromagnet, a lever and a support frame, wherein the first driving assembly comprises a pulling rod, a first guide cylinder, a first spring and a pull rope;

the pulling rod comprises a rod body and a butting block which are connected with each other; the pulling rod is connected with the valve rod through a pulling rope and is in sliding fit with the first guide cylinder; one end of the first spring is connected with the first guide cylinder, and the other end of the first spring is connected with the pulling rod; the first spring can apply a downward acting force to the pulling rod;

the electromagnet is arranged on the support frame, the middle part of the lever is hinged with the support frame, and the first end of the lever is abutted against the lower part of the abutting block, so that the first end of the lever is subjected to downward acting force; the second end of the lever is provided with an adsorption plate which is arranged below the electromagnet at intervals, and the second end of the lever is acted by downward force due to the gravity of the adsorption plate and keeps the lever balanced;

the electro-magnet with the second coil is connected, works as when the second coil produces the electromotive force, the electro-magnet can adsorb the adsorption plate makes the lever swing, the first end of lever with the butt piece breaks away from, and then makes the pulling rod rotates to the closed condition through above-mentioned stay cord pulling valve rod.

Furthermore, the control device also comprises a second driving assembly and a push rod, wherein the push rod is arranged in the first guide cylinder in a sliding manner and is positioned below the pulling rod;

the second driving assembly comprises a driving rod, a swinging rod, a second guide cylinder, a second spring and a locking rod;

the driving rod is in sliding fit with the second guide cylinder, one end of the second spring is connected with the second guide cylinder, and the other end of the second spring is connected with the driving rod; the second spring makes the driving rod have a downward movement tendency;

the lower part of the second guide cylinder is provided with a vertical groove, the locking rod is L-shaped and comprises a supporting rod and an unlocking rod which are connected with each other, the lower end of the supporting rod is hinged with the lower end of the second guide cylinder, and the upper end of the supporting rod is abutted to the driving rod through a roller; the unlocking rod extends out of the vertical groove and is positioned below the pushing rod;

one end of the swinging rod is hinged with the upper part of the driving rod through a rotating shaft, and a torsion spring is arranged at the rotating shaft and enables the swinging rod to be kept in a horizontal position; under the action of external force, the swinging rod can only swing downwards from the water level position;

the swinging rod is positioned below the pulling rod abutting block, and when the pulling rod moves downwards, the swinging rod can swing downwards under the action of the abutting block and reset to the horizontal position under the action of the torsion spring; when the pulling rod continues to move downwards, the pushing rod can be driven to move downwards, and the pushing rod can push the unlocking rod to swing, so that the driving rod is unlocked;

after the driving rod is unlocked, the second spring drives the driving rod to move downwards, and the swinging rod applies thrust to the pulling rod through the abutting block.

Furthermore, the lower end of the push rod is a wedge-shaped end, and the wedge-shaped slope surface of the push rod faces the roller.

Further, a first sliding block and a second sliding block are respectively arranged in the first guide cylinder and the second guide cylinder in a sliding manner;

the lower end of the pulling rod is connected with the first sliding block, the lower end of the driving rod is connected with the second sliding block, and the roller is abutted to the bottom of the second sliding block.

Further, the stiffness coefficient of the second spring is greater than the stiffness coefficient of the first spring.

Further, a hinge shaft of the lever is disposed adjacent to the first end.

Furthermore, a hanging hole is formed in the lever, and a balance weight is arranged in the hanging hole.

Further, the valve comprises a valve body and a valve core, and the valve rod is connected with the valve body through a valve core shaft;

in the open state, the valve rod is horizontally arranged, and in the closed state, the valve rod is vertically arranged.

Further, the pulling rod is located right below the valve core shaft.

Further, the dual magnetic circuit sensor includes:

the yoke iron is I-shaped and comprises two accommodating spaces;

the two permanent magnets are respectively arranged in the two accommodating spaces, and N poles or S poles of the two permanent magnets are abutted to the middle part of the yoke iron;

the first coil and the second coil are respectively wound on the two winding supports;

the two spring pieces are respectively connected to two ends of the yoke and are respectively fixedly connected with the two winding supports;

the connecting rod is arranged in a through hole in the middle of the yoke in a sliding mode, and two ends of the connecting rod are connected with the two spring pieces respectively;

when the connecting rod moves, the first coil and the second coil can generate electromotive force.

The invention has the beneficial effects that:

the control system with the double-magnetic-circuit sensor is obtained by the design, is arranged on a building (such as a high building or a dam), the yoke is fixedly connected with the building, and when an earthquake occurs, the first coil and the second coil are driven to generate electromotive force by vibration; the memory collects the electric signals for storage and transmits the electric signals to the processor for analysis, so that data such as speed, acceleration and the like are obtained, and a reliable basis is provided for scientific research. When the earthquake intensity is high and the electromotive force of the second coil is high, the electromagnet can obtain magnetism, so that the adsorption plate moves upwards; the absorption plate further drives the lever to swing, so that the connection between the abutting block and the pulling rod is disconnected. At the moment, the pulling rod can pull the valve rod to close under the action of the first spring, so that the pipeline is cut off, and the possibility of leakage of fluid in the pipeline is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a cross-sectional view of a dual magnetic circuit sensor according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of the control system according to the embodiment of the present invention after the lever and the driving lever are locked.

FIG. 3 is a schematic structural diagram of the control system according to the embodiment of the present invention after the lever and the driving rod are unlocked;

FIG. 4 is a schematic diagram of the control device and valve of FIG. 2 according to an embodiment of the present invention;

fig. 5 is a right side view of the second guide cylinder in fig. 4 according to the embodiment of the present invention.

Icon: 010-a control system; 100-double magnetic circuit sensor; 110-a yoke; 112-an intermediate connection; 114-a border; 120-permanent magnet; 130-a winding frame; 140-a spring leaf; 150-a connecting rod; 161-a first coil; 162-a second coil; 170-an armature; 180-briquetting; 190-patch panel; 200-a control device; 210-a first drive assembly; 211-pulling the rod; 2111-abutment block; 2112-first slider; 212-a first guide cylinder; 213-a first spring; 214-a pull cord; 220-a second drive assembly; 221-a drive rod; 2211-a second slider; 222-a second guide cylinder; 2221-vertical slot; 223-a second spring; 224-a locking lever; 2241-supporting rod; 2242-unlocking the lever; 2243-roller; 225-swing lever; 230-an electromagnet; 240-lever; 250-a support frame; 260-a push rod; 270-a counterweight; 280-an adsorption plate; 300-a valve; 310-valve stem.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that the present product is conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the present invention, unless otherwise expressly stated or limited, the first feature may be present on or under the second feature in direct contact with the first and second feature, or may be present in the first and second feature not in direct contact but in contact with another feature between them. Also, the first feature may be over, above or on the second feature including the first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.

Example 1:

referring to fig. 1, the present embodiment provides a dual magnetic circuit sensor 100, which includes an i-shaped yoke 110, two permanent magnets 120, two winding brackets 130, two spring pieces 140, and a connecting rod 150. The i-shaped yoke 110 forms two accommodating spaces, the two permanent magnets 120 are respectively arranged in the two accommodating spaces, the N pole of each permanent magnet 120 is abutted to the middle of the yoke 110, so that the yoke 110 is integrally formed into the N pole, and the two ends of the yoke 110 are arranged opposite to the S poles of the corresponding permanent magnets 120, so that a stable magnetic field is formed. The winding brackets 130 are respectively sleeved on the two permanent magnets 120, and the coils are respectively wound on the two winding brackets 130. The end of the winding bracket 130 is connected to the end of the yoke 110 via a corresponding spring plate 140; the two ends of the connecting rod 150 are connected to the two spring pieces 140, respectively. During earthquake, the connecting rod 150 can reciprocate to drive the two coils to cut the magnetic induction line to generate electromotive force.

Specifically, the yoke 110 includes a middle connection portion 112 and two side frames 114, and both ends of the middle connection portion are perpendicularly connected to the middle portions of the two side frames, respectively. The space between the two frames is separated by the middle connecting part to form two containing spaces; a permanent magnet 120 is disposed in each of the two receiving spaces, and an N pole of the permanent magnet 120 is connected to the intermediate connecting portion and an S pole thereof is connected to the armature. The yoke 110 is made of a magnetic conductive material so that the ends of the two frames are both magnetic (corresponding to the N-pole of the magnet); a stable magnetic field is formed between the end of the rim and the armature corresponding to the S-pole end of the permanent magnet 120.

Both ends of the yoke 110 are provided with a pressing block 180 for fixing the spring piece 140 to the end of the frame and a spring piece 140. The two permanent magnets 120 are also sleeved with winding brackets 130 which are connected with the spring pieces 140; two coils are also sleeved on the winding bracket. The middle connecting part of the yoke, the permanent magnet 120 and the middle part of the armature are provided with a through middle through hole, and a connecting rod 150 is arranged in the through middle through hole; the two ends of the connecting rod 150 are connected to the two spring pieces 140, respectively.

Furthermore, two wiring boards are respectively arranged on two sides of the yoke 110, and two ends of each wiring board are respectively connected with the pressing block; the two coils are connected to the wiring board through lead springs, respectively.

In this embodiment, the yoke 110 may be formed by stacking a plurality of silicon steel sheets; the spring plate 140 and the wiring board may be rectangular plates.

The operating principle of the dual magnetic circuit sensor 100 is as follows: when in use, the yoke 110 is fixedly connected with a building; when an earthquake occurs, the two wire wound brackets and the connecting rod 150 are vibrated simultaneously by the vibration, thereby generating two sets of electromotive forces. The synchronous output of the acceleration and speed signals can be obtained by recording and processing the two groups of electromotive force signals respectively. Alternatively, one terminal block is connected to the storage (not shown in the figure), and the other terminal block is connected to the other control device 200; the storage stores the electromotive force data and transmits the data to the processor, and the processor processes the electromotive force signals; the control device 200 performs a corresponding action (e.g., closing the gas valve) under the influence of another set of electromotive force signals.

Example 2:

referring to fig. 2 and 3, the present embodiment provides a control system 010 of a dual magnetic circuit sensor 100, which includes a valve 300, a memory (not shown), and the dual magnetic circuit sensor 100 provided in embodiment 1. For convenience of description, two coils are named as a first coil 161 and a second coil 162; the first coil is connected to the memory and the second coil is connected to the control device 200. The valve is used for controlling the on-off of the pipeline, the memory is used for storing an electromotive force signal of the first coil, and when the electromotive force of the second coil is large enough, the memory can drive the control device 200 to close the valve.

The valve comprises a valve body 310 and a valve core, wherein the valve rod 310 is connected with the valve body through a valve core shaft; in the open state, the valve rod is horizontally arranged, and in the closed state, the valve rod is vertically arranged.

Referring to fig. 4, the control device 200 includes a first driving assembly 210, an electromagnet 230, a lever 240, and a supporting frame 250; the first driving assembly 210 includes a pulling rod 211, a first guide cylinder 212, a first spring 213, and a pulling rope 214. The pulling rod 211 comprises a rod body, a first sliding block 2112 and an abutting block 2111, wherein the abutting block 2111 is of a rectangular plate-shaped structure, and the first sliding block 2112 is of a flat cylindrical shape; the body of rod is vertical to be set up, and butt piece 2111 and first slider 2112 are connected respectively in the upper end and the lower extreme of the body of rod. The first guiding cylinder 212 is vertically and fixedly arranged, and the first sliding block 2112 is slidably arranged in the first guiding cylinder 212. The first spring 213 is provided in the first guide cylinder 212, and has an upper end abutting against the upper end cap of the first guide cylinder 212 and a lower end abutting against the first slider 2112; the first spring 213 can apply a downward force to the pulling rod 211. One end of the pull cord 214 is connected to the abutment block 2111, and the other end is connected to the valve stem. When the pulling rod 211 is free from other external force, the elastic force of the first spring 213 can make the pulling rod 211 pull the valve rod to the closed state through the pulling rope 214.

The electromagnet 230, the lever 240, and the support bracket 250 are disposed between the yoke 110 and the first guide cylinder 212, and are located below the valve. The middle part (not referring to the middle position, but only for distinguishing the end part) of the lever 240 is hinged with the support frame 250 through a hinge shaft, the first end (corresponding to the left end in the drawing) of the lever 240 is abutted with the lower part of the abutting block 2111, because the pull rod is subjected to the elastic force of the first spring 213, the pull rod can apply downward pressure to the first end of the lever 240 through the abutting block 2111, the second end of the lever 240 is provided with an adsorption plate, and the adsorption plate is arranged below the electromagnet 230 and is arranged at a distance from the electromagnet 230; a weight 270 is further provided at the right end of the hinge shaft of the lever 240. The lever 240 can be kept balanced by the weight of the right end of the lever 240 and the weight 270.

When the electromagnet 230 is energized, it gains magnetism; and the greater the current, the greater its magnetism; when the magnetism is sufficiently large, it can cause the attraction plate to move upward, causing the left end of the lever 240 to swing downward and disengage from the abutment block 2111. At this time, the pulling lever 211 closes the valve by the first spring 213 through the pulling rope 214.

Further, since the electromotive force generated by the earthquake is small, in order to improve the response sensitivity of the control device 200 to the earthquake of a lower level, in the present embodiment, the hinge shaft of the lever 240 is disposed near the first end of the lever; at this time, the lever 240 may still be driven to swing by a smaller electromotive force signal.

In addition, when the pulling rod 211 is in the initial state, for example, the elastic force of the first spring 213 is too large; in order to balance the lever 240, it is necessary to hang the heavy weight 270 or move the weight 270 to the right. At this time, a relatively large magnetic force is required to drive the lever 240 to swing; i.e. to the detriment of the sensitivity improvement. Therefore, in order to improve the sensitivity, the compression force of the first spring 213 should not be generally excessive. And the closing speed of the valve is small because the compression force of the first spring 213 is small, which results in a small speed of pulling the rod 211.

In order to ensure a relatively high sensitivity of the control device 200 and to increase the closing speed of the valve; the control device 200 is further provided with a second drive assembly 220 and a push rod 260; the pushing rod 260 is slidably disposed in the first guide cylinder 212, is located below the first slider 2112, and is spaced apart from the first slider 2112. The second driving assembly 220 includes a driving lever 221, a swing lever 225, a second guide cylinder 222, a second spring 223, and a locking lever 224; the second guide cylinder 222 is vertically disposed, and a second slider 2211 is disposed at a lower end of the driving rod 221.

The second slider 2211 is slidably fitted to the second guide cylinder 222, the upper end of the second spring 223 abuts against the upper end cap of the second guide cylinder 222, and the lower end is connected to the second slider 2211. The second spring 223 causes the drive rod 221 to have a tendency to move downward. A locking lever 224 is disposed below the second slider 2211 for preventing the driving lever 221 from moving downward. A vertical groove 2221 (fig. 5) is formed in the lower portion of the second guide cylinder 222, the locking lever 224 is L-shaped, and includes a supporting lever 2241 and an unlocking lever 2242, which are connected to each other, the lower end of the supporting lever 2241 is hinged to the lower end of the second guide cylinder 222, and the upper end of the supporting lever 2241 is abutted to the bottom of the second slider 2211 through a roller 2243; the lock release lever 2242 protrudes out of the vertical slot 2221 and is located below the push lever 260. When the unlocking lever 2242 swings under the action of external force, it can swing the support lever 2241, so that the roller 2243 on the support lever 2241 is separated from the second slider 2211, that is, the drive lever 221 is unlocked, and at this time, the drive lever 221 can move downward under the action of the second spring 223.

One end of the swing lever 225 is hinged with the upper part of the driving rod 221 through a rotating shaft, and a torsion spring is arranged at the rotating shaft and enables the swing lever 225 to be kept in a horizontal position; the upper end of the driving rod 221 is provided with a limiting block which is positioned above the swinging rod 225; under the action of external force, the swing lever 225 can only swing downward from the water level position, but cannot swing upward from the horizontal position.

The swing lever 225 is located below the abutment block 2111 of the pulling lever 211, and when the pulling lever 211 moves downward, the abutment block 2111 can abut against the end of the swing lever 225, so that the swing lever 225 swings downward. As the abutment block 2111 continues to move downward, the swing rod 225 resets to the horizontal position under the influence of the torsion spring. When the pulling rod 211 continues to move downward, the pushing rod 260 can be driven to move downward, and the pushing rod 260 can push the unlocking rod 2242 to swing, so that the driving rod 221 is unlocked. After the driving rod 221 is unlocked, the second spring 223 drives the driving rod 221 to move downward, and the swing rod 225 applies a pushing force to the pulling rod 211 through the abutting block 2111, so that the moving speed of the pulling rod 211 is increased, and the closing speed of the valve is increased.

Because the upper end of bracing piece 2241 passes through gyro wheel 2243 and second slider 2211 butt to make actuating lever 221 can be by quick unblock, and then improve the closing speed of valve. In addition, the stiffness coefficient and the precompression amount of the second spring 223 are both larger than those of the progressive system and the precompression amount of the first spring 213, so that the driving rod 221 can obtain a large driving force to drive the pulling rod 211 to accelerate.

In addition, in order to prevent the lower end surface of the push lever 260 from affecting the rotation of the lock cancellation lever 2242, the lower end of the push lever 260 is a wedge-shaped end, and the wedge-shaped surface thereof is disposed toward the roller 2243.

The operation principle of the control system 010 with the dual magnetic circuit sensor 100 provided in this embodiment is as follows:

when an earthquake occurs, the first coil and the second coil generate electromotive force, wherein the first coil transmits the electromotive force signal to the memory. The second coil transmits an electromotive force signal to the electromagnet 230, and the electromagnet 230 obtains magnetism after being electrified, so that the adsorption plate is driven to move upwards, and the left end of the lever 240 swings downwards; thereby disengaging the abutment block 2111 at the upper end of the pulling rod 211 from the lever 240. The pulling rod 211 pulls the valve stem to rotate a certain angle through the pulling rope 214 by the first spring 213. The pulling rod 211 continues to move downwards, and since the distance between the abutting block 2111 and the swinging rod 225 is smaller than the distance between the second slider 2211 and the upper end of the pushing rod 260 in the initial state, after the abutting block 2111 moves to the lower side of the swinging rod 225, the first slider 2112 can touch the pushing rod 260, and the pushing rod 260 pushes the locking rod 224 to rotate so as to unlock. At this time, the second spring 223 drives the driving rod 221 to move downward and applies a downward pushing force to the pulling rod 211 through the shifting rod, so that the pulling rod 211 obtains a relatively large acceleration and speed; thereby pulling the valve rod to close quickly.

It should be noted that, in other embodiments, the second driving assembly 220 may not be provided; the valve may also be closed with only the first drive assembly 210.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A control system with a dual magnetic circuit sensor, comprising:

the double-magnetic-circuit sensor comprises a first coil and a second coil, wherein the first coil and the second coil can generate electromotive force under the action of vibration;

the memory is connected with the first coil and used for acquiring an electric signal;

a valve for mounting on a pipe, the valve comprising a valve stem;

the control device comprises a first driving assembly, an electromagnet, a lever and a support frame, wherein the first driving assembly comprises a pulling rod, a first guide cylinder, a first spring and a pull rope; the push rod is arranged in the first guide cylinder in a sliding mode and is positioned below the pulling rod; the second driving assembly comprises a driving rod, a swinging rod, a second guide cylinder, a second spring and a locking rod;

the driving rod is in sliding fit with the second guide cylinder, one end of the second spring is connected with the second guide cylinder, and the other end of the second spring is connected with the driving rod; the second spring makes the driving rod have a downward movement tendency;

the lower part of the second guide cylinder is provided with a vertical groove, the locking rod is L-shaped and comprises a supporting rod and an unlocking rod which are connected with each other, the lower end of the supporting rod is hinged with the lower end of the second guide cylinder, and the upper end of the supporting rod is abutted to the driving rod through a roller; the unlocking rod extends out of the vertical groove and is positioned below the pushing rod;

one end of the swinging rod is hinged with the upper part of the driving rod through a rotating shaft, and a torsion spring is arranged at the rotating shaft and enables the swinging rod to be kept in a horizontal position; under the action of external force, the swinging rod can only swing downwards from the horizontal position;

the swinging rod is positioned below the abutting block of the pulling rod, and when the pulling rod moves downwards, the swinging rod can swing downwards under the action of the abutting block and reset to the horizontal position under the action of the torsion spring; when the pulling rod continues to move downwards, the pushing rod can be driven to move downwards, and the pushing rod can push the unlocking rod to swing, so that the driving rod is unlocked;

after the driving rod is unlocked, the second spring drives the driving rod to move downwards, and the swinging rod applies thrust to the pulling rod through the abutting block

The pulling rod comprises a rod body and an abutting block which are connected with each other; the pulling rod is connected with the valve rod through a pulling rope and is in sliding fit with the first guide cylinder; one end of the first spring is connected with the first guide cylinder, and the other end of the first spring is connected with the pulling rod; the first spring can apply a downward acting force to the pulling rod;

the electromagnet is arranged on the support frame, the middle part of the lever is hinged with the support frame, and the first end of the lever is abutted against the lower part of the abutting block, so that the first end of the lever is subjected to downward acting force; the second end of the lever is provided with an adsorption plate which is arranged below the electromagnet at intervals, and the second end of the lever is acted by downward force due to the gravity of the adsorption plate and keeps the lever balanced;

the electro-magnet with the second coil is connected, works as when the second coil produces the electromotive force, the electro-magnet can adsorb the adsorption plate makes the lever swing, the first end of lever with the butt piece breaks away from, and then makes the pulling rod rotates to the closed condition through above-mentioned stay cord pulling valve rod.

2. The control system with the double magnetic circuit sensor according to claim 1, wherein the lower end of the push rod is a wedge-shaped end, and the wedge-shaped slope of the push rod is disposed toward the roller.

3. The control system with the dual magnetic circuit sensor according to claim 1, wherein a first slider and a second slider are slidably disposed in the first guide cylinder and the second guide cylinder, respectively;

the lower end of the pulling rod is connected with the first sliding block, the lower end of the driving rod is connected with the second sliding block, and the roller is abutted to the bottom of the second sliding block.

4. A control system with a dual magnetic circuit sensor according to claim 1, wherein the stiffness coefficient of the second spring is greater than the stiffness coefficient of the first spring.

5. A control system with a dual magnetic circuit sensor according to any of claims 1-3, characterized in that the hinge axis of the lever is arranged close to the first end.

6. The control system with the dual magnetic circuit sensor according to claim 1, wherein the lever is provided with a hanging hole, and a weight is provided in the hanging hole.

7. The control system with the dual magnetic circuit sensor according to claim 6, wherein the valve comprises a valve body and a valve core, and the valve rod is connected with the valve body through a valve core shaft;

in the open state, the valve rod is horizontally arranged, and in the closed state, the valve rod is vertically arranged.

8. A control system with a dual magnetic circuit sensor according to claim 7, wherein the pulling rod is located directly below the valve plug shaft.

9. A control system with a dual magnetic circuit sensor according to claim 1, characterized in that said dual magnetic circuit sensor comprises:

the yoke iron is I-shaped and comprises two accommodating spaces;

the two permanent magnets are respectively arranged in the two accommodating spaces, and N poles or S poles of the two permanent magnets are abutted to the middle part of the yoke iron;

the first coil and the second coil are respectively wound on the two winding supports;

the two spring pieces are respectively connected to two ends of the yoke and are respectively fixedly connected with the two winding supports;

the connecting rod is arranged in a through hole in the middle of the yoke in a sliding mode, and two ends of the connecting rod are connected with the two spring pieces respectively;

when the connecting rod moves, the first coil and the second coil can generate electromotive force.

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