Automatic closing device

Abstract

The utility model belongs to the technical field of air type switches, and discloses an automatic closing device which comprises a shell, a power unit and an output unit, the shell is connected with the air type switch, the power unit and the output unit are arranged on the shell, the output unit comprises a rolling shaft and a shifting rod, the rolling shaft is in running fit with the shell, and the shifting rod is arranged on the rolling shaft. One end of the deflector rod is fixedly connected with the rolling shaft, and the other end of the deflector rod is located between the surface of the air type switch and the knife switch; and the power unit drives the rolling shaft to rotate so as to drive the driving lever to synchronously rotate to lift the knife switch. According to the invention, automatic switching-on can be realized, manual switching-on is not needed, the operation efficiency of a power system is improved, meanwhile, potential safety hazards are reduced, and the high safety level of personnel is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air switch, more particularly, to an automatic closing device. BACKGROUND

[0002] The air switch is a traditional electrical equipment, which is usually used in the circuit breaker system. The design purpose of the air switch is to protect the circuit, and once the overload, short circuit or other abnormal conditions occur in the circuit, the power supply will be cut off to disconnect the circuit; after the circuit returns to normal, the circuit can be turned on by completing the closing process, which ensures the safety of power use.

[0003] The traditional air switch relies on manual operation, and when the circuit needs to be turned on, personnel manually operate the lifting of the contactor to realize the connection of the circuit, which has the problems of low efficiency and low personnel safety level. With the development of science and technology and the growth of the demand for power automation, the traditional manual closing method is insufficient to meet the needs of efficient operation and remote monitoring of modern power systems. CONTENT OF THE INVENTION

[0004] The embodiment of the present application provides an automatic closing device, which can realize automatic closing without manual closing, improves the operation efficiency of the power system, reduces the safety hazard and ensures the high safety level of personnel.

[0005] The automatic closing device provided by the present application adopts the following technical scheme:

[0006] An automatic closing device comprises:

[0007] A housing is fixedly connected with the air switch;

[0008] A power unit is arranged in the housing;

[0009] An output unit is arranged in the housing, the output unit comprises a roller and a lever, the roller is rotationally matched with the housing, one end of the lever is fixedly connected with the roller, and the other end of the lever is located between the surface of the air switch and the contactor; the power unit drives the roller to rotate to drive the lever to synchronously rotate and lift the contactor.

[0010] Optionally, the power unit is in conduction with a power supply; the power unit comprises a cover, a first electrical module, a second electrical module and a connecting rod, the cover is fixedly installed on the housing, the first electrical module and the second electrical module are arranged at intervals, and the first electrical module and the second electrical module are in sliding fit with the cover;

[0011] The outer peripheral wall of the roller is provided with a spiral guide groove, the connecting rod moves synchronously with the first electrical module, and one end of the connecting rod is assembled to the first electrical module and the other end is located in the spiral guide groove; the second electrical module is powered on, the first electrical module moves towards the second electrical module, thereby driving the connecting rod to displace to drive the roller to rotate.

[0012] Optionally, the first electrical module comprises a first electromagnetic coil and a first conductive plate, the first electromagnetic coil is arranged on the first conductive plate, the second electrical module comprises a second electromagnetic coil and a second conductive plate, the second electromagnetic coil is arranged on the second conductive plate; the second electromagnetic coil is powered on to generate magnetic attraction with the first conductive plate, so that the first electrical module moves towards the second electrical module.

[0013] Optionally, the power unit further comprises a third electrical module, the third electrical module is in sliding fit with the shell and is arranged on the side of the second electrical module away from the first electrical module, the third electrical module is arranged in parallel and spaced apart with the second electrical module; the third electrical module is powered on to drive the first electrical module and the second electrical module to move towards the third electrical module, thereby driving the connecting rod to displace twice.

[0014] Optionally, it further comprises a first time relay, the first time relay is electrically connected with the third electrical module, after the second electrical module is powered on, the first time relay controls the third electrical module to be powered on; the first electrical module, the second electrical module and the third electrical module are configured as a first stage power mechanism.

[0015] Optionally, the power unit further comprises a fourth electrical module and a fifth electrical module, the fourth electrical module and the fifth electrical module are arranged on the side of the third electrical module away from the second electrical module, the fourth electrical module and the fifth electrical module are arranged in parallel and spaced apart with the third electrical module, and the fourth electrical module is located between the third electrical module and the fifth electrical module, the fourth electrical module is in sliding fit with the shell.

[0016] The fourth electrical module and the fifth electrical module are powered on, the first stage power mechanism moves towards the fourth electrical module, at the same time, the fourth electrical module moves towards the fifth electrical module, so that the connecting rod displaces for the third time.

[0017] Optionally, a second time relay is further included, the second time relay is electrically connected with the fourth electric module and the fifth electric module, the third electric module is powered on, and the second time relay controls the fourth electric module and the fifth electric module to be powered on; the fourth electric module and the fifth electric module are configured as a second stage power mechanism.

[0018] Optionally, the power unit further comprises a limiting assembly, the limiting assembly comprises a limiting electromagnetic coil, an armature and a limiting column;

[0019] The limiting electromagnetic coil is arranged in the shell, the armature is arranged in parallel with the limiting electromagnetic coil, one end of the limiting column is fixedly connected with the armature, and the limiting column is perpendicular to the armature and is in sliding fit with the shell.

[0020] Optionally, the shell is provided with a plurality of clamping pieces, and the plurality of clamping pieces are arranged in one-to-one correspondence with and abut against the first electric module, the second electric module, the third electric module and the fourth electric module.

[0021] The limiting column is provided with a plurality of limiting columns, the limiting columns correspond to the clamping pieces one by one, and the limiting columns are arranged on the side of the clamping pieces close to the fifth electric module, and the plurality of limiting columns abut against the corresponding clamping pieces to limit the movement direction and distance of the first electric module, the second electric module, the third electric module and the fourth electric module.

[0022] Optionally, the power unit and the output unit are provided with two groups, which are located at two ends of the air switch and are symmetrically arranged; the two levers are located on the same straight line, and the two levers rotate synchronously to lift the shutter.

[0023] From the above technical solutions, the embodiments of the present application have the following advantages:

[0024] The output unit drives the roller to rotate, the lever fixedly connected with the roller rotates synchronously with the roller, the lever drives the shutter of the air switch to complete the automatic closing operation; after the closing is completed, the roller is driven to rotate reversely by the power unit to restore, and the lever is synchronously driven to restore to wait for closing again, so that automatic closing is realized, manual closing is not needed, the operation efficiency of the power system is improved, the safety hidden danger is reduced, and the safety level of the on-site personnel is high. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0026] Figure 1 A schematic diagram of the overall structure of an automatic closing device disclosed in an embodiment of the present application;

[0027] Figure 2 A structural sectional view of an automatic closing device disclosed in an embodiment of the present application highlighting the power unit and the output unit;

[0028] Figure 3 A top view of an automatic closing device disclosed in an embodiment of the present application highlighting the power unit;

[0029] Figure 4 A side view of an automatic closing device disclosed in an embodiment of the present application highlighting the power unit.

[0030] Explanation of reference signs:

[0031] 1, housing; 11, cover; 111, clamping piece; 112, fixing pin; 113, first hook portion; 114, second hook portion; 2, power unit; 21, first electrical module; 211, first electromagnetic coil; 212, first conductive plate; 22, second electrical module; 221, second electromagnetic coil; 222, second conductive plate; 23, connecting rod; 24, third electrical module; 241, third electromagnetic coil; 242, third conductive plate; 25, fourth electrical module; 251, fourth electromagnetic coil; 252, fourth conductive plate; 26, fifth electrical module; 261, fifth electromagnetic coil; 27, limiting assembly; 271, limiting electromagnetic coil; 272, armature; 273, limiting column; 274, reset piece; 28, spring; 3, output unit; 31, roller; 311, spiral guide groove; 32, lever. DETAILED DESCRIPTION

[0032] The present application will be further described in detail below with reference to the accompanying drawings.

[0033] The embodiment of the present application provides an automatic closing device, which can realize automatic closing, does not need manual closing, improves the operation efficiency of the power system, reduces the security risks, and guarantees the high safety level of personnel.

[0034] In order to make the person skilled in the art better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative work should belong to the protection scope of the present application. In addition, the technical schemes of various embodiments can be combined with each other, but it should be considered that the combination of technical schemes does not exist and is not within the protection scope of the present application when the combination of technical schemes is contradictory or unachievable on the premise that the person skilled in the art can realize it.

[0035] The terms "first", "second", "third", "fourth" and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a particular order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0036] The conventional air switch relies on manual operation, when the circuit needs to be turned on, the personnel needs to manually operate the lifting of the contactor to realize the connection of the circuit, which has the problems of low efficiency and low personnel safety level. In order to solve the above technical problems, the present application provides an automatic closing device, please refer to Figure 1 For an embodiment of the automatic closing device in the embodiments of the present application, it comprises a shell 1, a power unit 2 and an output unit 3, the shell 1 is used for fixed connection with the air switch, the power unit 2 and the output unit 3 are arranged in the shell 1, the power unit 2 is used for providing power and transmitting to the output unit 3, and the output unit 3 is used for lifting the contactor to complete the automatic closing operation.

[0037] Please refer to Figures 1 to 3The power unit 2 is in conduction with the power supply, the power unit 2 comprises a cover 11, a first electrical module 21, a second electrical module 22 and a connecting rod 23, the cover 11 is fixedly installed on the shell 1, the first electrical module 21 and the second electrical module 22 are located in the cover 11, and the first electrical module 21 and the second electrical module 22 are arranged at intervals, the first electrical module 21 and the second electrical module 22 are in sliding fit with the cover 11, the connecting rod 23 moves synchronously with the first electrical module 21, and one end of the connecting rod 23 is assembled in the first electrical module 21; when the second electrical module 22 is powered, the first electrical module 21 moves towards the second electrical module 22, thereby driving the connecting rod 23 to displace. In the embodiment, the length direction of the cover 11 is a horizontal direction, the first electrical module 21 moves along the length direction of the cover 11, the first electrical module 21 drives the connecting rod 23 to move synchronously, so that the connecting rod 23 displaces in the horizontal direction relative to the cover 11; the distance between the first electrical module 21 and the second electrical module 22 is the displacement amount of the connecting rod 23 moving to the second electrical module 22, and the distance between the first electrical module 21 and the second electrical module 22 is adjusted, so that the displacement amount of the connecting rod 23 moving to the second electrical module 22 is adjusted.

[0038] Specifically, the first electrical module 21 comprises a first electromagnetic coil 211 and a first conductive plate 212, the first electromagnetic coil 211 is arranged on the first conductive plate 212, the second electrical module 22 comprises a second electromagnetic coil 221 and a second conductive plate 222, the second electromagnetic coil 221 is arranged on the second conductive plate 222 and is fixedly connected with the second conductive plate 222, the second electromagnetic coil 221 is located on the side of the second conductive plate 222 close to the first electrical module 21, the second electromagnetic coil 221 is powered to generate magnetic attraction with the first conductive plate 212, so that the first conductive plate 212 moves towards the second electromagnetic coil 221. It can be understood that the first conductive plate 212 is made of iron or other materials that can be magnetized, when the second electromagnetic coil 221 passes through the current, according to the law of electromagnetic induction, the second electromagnetic coil 221 will generate a magnetic field, and the direction of the generated magnetic field is attracted to the first conductive plate 212 in the first electrical module 21, the first conductive plate 212 is moved towards the second electrical module 22 under the action of the magnetic force, so as to realize the movement of the first electrical module 21 towards the second electrical module 22, thereby driving the connecting rod 23 to displace. By adjusting the current size, the moving speed of the first conductive plate 212 in the first electrical module 21 can be finely controlled, and accurate control is realized.

[0039] Further, the first electrical module 21 is connected with the second electrical module 22 through the spring 28, one end of the spring 28 is fixedly connected with the first electrical module 21, and the other end is fixedly connected with the second electrical module 22. When the second electrical module 22 is powered on, the first electrical module 21 compresses the spring 28 and magnetically attracts the second electrical module 22; when the second electrical module 22 is powered off, under the rebounding force of the spring 28, the first electrical module 21 moves towards the direction away from the second electrical module 22, thereby driving the connecting rod 23 to reset. In the embodiment, multiple groups of springs 28 can be provided, and the mechanical friction between the first electrical module 21 and the second electrical module 22 is avoided, thereby improving the reliability and service life of the power unit 2.

[0040] Please refer to Figure 1 and Figure 2 , the output unit 3 includes a roller 31 and a lever 32, the roller 31 is rotationally connected with the shell 1, one end of the lever 32 is fixedly connected with the roller 31, and the other end is located between the surface of the air switch and the contactor; the power unit 2 drives the roller 31 to rotate, so as to drive the lever 32 to rotate synchronously and lift the contactor. In the embodiment, the roller 31 is rotationally connected with the shell 1 through a bearing, a spiral guide groove 311 is arranged on the outer circumferential wall of the roller 31, one end of the connecting rod 23 away from the first electrical module 21 is located in the spiral guide groove 311, and the second electrical module 22 drives the first electrical module 21 to move towards the second electrical module 22, thereby driving the connecting rod 23 to displace, and the end of the connecting rod 23 located in the spiral guide groove 311 moves along the spiral guide groove 311, thereby driving the roller 31 to rotate, and converting the linear power output of the connecting rod 23 into the rotary power output of the roller 31. It can be understood that when the connecting rod 23 linearly displaces, it will force the roller 31 to rotate along the thread in the spiral guide groove 311 due to being located in the spiral guide groove 311, the rotation angle of the roller 31 corresponds to a certain linear displacement of the connecting rod 23, the linear motion is converted into angular motion, a larger rotation angle can be achieved through a simple linear pushing and pulling action, and the working efficiency is improved; secondly, the rotation speed and output torque of the roller 31 can be accurately controlled by adjusting the position of the connecting rod 23, the structure is simple, the occupied space is small, and it is suitable for the installation space limited by the air switch.

[0041] The output unit 3 drives the roller 31 to rotate, the lever 32 fixedly connected with the roller 31 rotates synchronously with the roller 31, the lever 32 drives the contactor of the air switch to complete the automatic closing operation; after the closing is completed, the roller 31 is driven to rotate reversely by the power unit 2 to reset, and the lever 32 is synchronously reset to wait for closing again, thereby realizing automatic closing, without manual closing, improving the operation efficiency of the power system, reducing the safety hazard, and ensuring the high safety level of personnel.

[0042] The application simulates manual closing, detects the closing force and displacement of the air switch according to the actual field, and divides the power output of the power unit 2 into two stages of initial closing and later closing. The initial closing does not need too much force, and the operation of the initial closing is that the lever 32 gradually lifts the contactor. When the contactor is close to the vertical base of the air switch, the critical point from the initial closing to the later closing is reached, and the later closing needs a certain force to push up the contactor.

[0043] Please refer to Figure 2 and Figure 3 In order to realize the power output of the initial closing, the power unit 2 further comprises a third electrical module 24 which is in sliding fit with the shell 11 and is arranged on the side of the second electrical module 22 away from the first electrical module 21. The third electrical module 24 is arranged in parallel with and spaced from the second electrical module 22, and the second electrical module 22 and the third electrical module 24 are connected by a spring 28. Specifically, the third electrical module 24 comprises a third electromagnetic coil 241 and a third conductive plate 242. The third electromagnetic coil 241 is arranged on the third conductive plate 242 and is fixedly connected with the third conductive plate 242. The third electromagnetic coil 241 is located on the side of the third conductive plate 242 close to the second electrical module 22. The third electromagnetic coil 241 generates magnetism after being electrified and is magnetically attracted to the second conductive plate 222, so that the second conductive plate 222 moves towards the direction of the third electromagnetic coil 241. That is, the third electrical module 24 is electrified to drive the first electrical module 21 and the second electrical module 22 to move synchronously towards the direction of the third electrical module 24, thereby driving the connecting rod 23 to produce secondary displacement.

[0044] Further, in order to realize the sequential magnetic attraction of the first electrical module 21, the second electrical module 22 and the third electrical module 24 and increase the displacement of the connecting rod 23, the automatic closing device further comprises a first time relay which is electrically connected with the third electrical module 24. After the second electromagnetic coil 221 in the second electrical module 22 is electrified, the first time relay controls the third electromagnetic coil 241 in the third electrical module 24 to be electrified. The first time relay is used to delay the electrification of the third electrical module 24. After a predetermined time interval is set, the circuit is automatically turned on. In this embodiment, the time interval set by the first time relay is 0.1S. The first time relay is turned on 0.1S after the first electrical module 21 and the second electrical module 22 are attracted. The first time relay turns on the third electrical module 24, and the third electromagnetic coil 241 in the third electrical module 24 is electrified to generate magnetism. After the first electrical module 21 and the second electrical module 22 are attracted, the whole is attracted to the third electrical module 24, driving the connecting rod 23 to produce secondary displacement to increase the displacement of the connecting rod 23, so that the roller 31 rotates a larger angle, and the lever 32 realizes a larger lifting distance of the contactor.

[0045] The first electrical module 21, the second electrical module 22 and the third electrical module 24 are configured as a first-stage power mechanism for completing the lifting of the initial closing contact, so that the contact is lifted to the critical point from the initial closing stage to the late closing stage. It can be understood that the first electrical module 21, the second electrical module 22 and the third electrical module 24 provided by the first-stage power mechanism are the power points for lifting the contact, specifically, the second electromagnetic coil 221 in the second electrical module 22 is powered to generate a magnetic field, and the first conductive plate 212 in the first electrical module 21 is attracted, so that the first electrical module 21 and the second electrical module 22 are attracted to form a whole, 0.1 seconds after the first electrical module 21 and the second electrical module 22 are attracted, the first time relay is turned on, so that the third electromagnetic coil 241 in the third electrical module 24 is powered to generate a magnetic field, and the whole of the first electrical module 21 and the second electrical module 22 is attracted to the third electrical module 24, at this time, the power output of the initial closing stage is completed.

[0046] In order to realize the power output of the late closing stage, the power unit 2 further comprises a fourth electrical module 25 and a fifth electrical module 26, the fourth electrical module 25 and the fifth electrical module 26 are arranged on the side of the third electrical module 24 away from the second electrical module 22, the fourth electrical module 25 and the fifth electrical module 26 are arranged in parallel and spaced apart from the third electrical module 24, the fourth electrical module 25 is located between the third electrical module 24 and the fifth electrical module 26, and the third electrical module 24, the fourth electrical module 25 and the fifth electrical module 26 are connected by springs 28, and the fourth electrical module 25 is in sliding cooperation with the shell 11. Specifically, the fourth electrical module 25 comprises a fourth electromagnetic coil 251 and a fourth conductive plate 252, the fourth electromagnetic coil 251 is arranged on the fourth conductive plate 252, and the fourth electromagnetic coil 251 is located on the side of the fourth conductive plate 252 close to the third electrical module 24; the fifth electrical module 26 comprises a fifth electromagnetic coil 251, the fifth electromagnetic coil 251 is arranged on the end of the shell 11 away from the first electrical module and is fixedly connected with the shell 11, the fifth electromagnetic coil 261 is powered to generate a magnetic field and is magnetically attracted to the fourth conductive plate 252, the first-stage power mechanism moves towards the fourth electrical module 25, and at the same time, the fourth electrical module 25 moves towards the fifth electrical module 26, so that the connecting rod 23 is displaced for the third time. In this embodiment, the fifth electromagnetic coil 251 is fixedly installed on the left side wall of the shell 11, the structure of the fifth electrical module 26 only comprises the first electromagnetic coil 221, the structures of the first electrical module 21, the second electrical module 22, the third electrical module 24 and the fourth electrical module 25 are the same, and the same electromagnetic coil and conductive plate are adopted. In other embodiments, the structure of the fifth electrical module 26 can be the same as that of the first electrical module 21, the second electrical module 22, the third electrical module 24 and the fourth electrical module 25.

[0047] Further, in order to realize the stage closing operation, the automatic closing device further comprises a second time relay, the second time relay is electrically connected with the fourth electric module 25 and the fifth electric module 26, after the third electromagnetic coil 241 in the third electric module 24 is energized, the second time relay controls the fourth electromagnetic coil 251 in the fourth electric module 25 and the fifth electromagnetic coil 261 in the fifth electric module 26 to be energized at the same time. In the embodiment, the time interval set by the second time relay is 0.1S, the second time relay is turned on at 0.1S after the first electric module 21, the second electric module 22 and the third electric module 24 are attracted to form an integral whole, the second time relay turns on the fourth electric module 25 and the fifth electric module 26, the fourth electric coil 251 in the fourth electric module 25 is energized to generate magnetism, so that the first stage power mechanism is attracted to the fourth electric module 25, at the same time, the fifth electric magnetic coil 261 in the fifth electric module 26 is energized to generate magnetism, the fourth electric module 25 is attracted to the fifth electric module 26, the connecting rod 23 is displaced three times to increase the displacement of the connecting rod 23, because the fourth electric module 25 and the fifth electric module 26 act at the same time, so that the roller 31 rotates a larger angle in a short time, the lever 32 exerts a larger lifting force on the contactor, and the one-time lifting of the contactor is completed to realize the closing operation.

[0048] The fourth electric module 25 and the fifth electric module 26 are configured as the second stage power mechanism, which is used to complete the more forceful lifting of the contactor in the later stage of closing, so that the contactor is lifted once to realize the closing operation. It can be understood that the contactor is lifted by the first stage power mechanism and the second stage power mechanism as the power point, specifically, after the first stage power mechanism is attracted to form an integral whole at 0.1S, the second time relay is turned on to make the fourth electromagnetic coil 251 in the fourth electric module 25 and the fifth electromagnetic coil 261 in the fifth electric module 26 be energized to generate magnetism; the fourth electromagnetic coil 251 in the fourth electric module 25 is energized to generate magnetism to attract the third electric plate 242 in the third electric module 24, so that the first stage power mechanism is attracted to the fourth electric module 25, at the same time, the fifth electromagnetic coil 261 in the fifth electric module 26 is energized to generate magnetism to attract the fourth electric plate 252 in the fourth electric module 25, so that the first stage power mechanism and the second stage power mechanism are attracted to form an integral whole to complete the power output in the later stage of closing, at this time, the displacement of the connecting rod 23 is the largest, so that the roller rotates a larger angle to provide the lever 32 with a larger acting force to lift the contactor.

[0049] In the embodiment, the power unit 2 contains five electrical modules, i.e., the first electrical module 21 to the fifth electrical module 26, the spacing between each electrical module gradually increases, so the distance between the electromagnetic coils in each electrical module gradually increases, when each electrical module is sequentially energized to be adsorbed, the displacement of the connecting rod 23 is different, and the force provided is different, so as to meet the phenomenon that the force to be overcome is increasingly large during the closing process, and the blade can be effectively closed. The first electrical module 21 and the second electrical module 22 are adsorbed and then adsorbed with the third electrical module 24, and the first-stage power mechanism is adsorbed with the second-stage power mechanism after the first-stage power mechanism is adsorbed to form a whole, so that the connection between the power units 2 is relatively flexible, and the service life of the power unit 2 is long. If the output force of the multiple electrical units is too large when they are adsorbed at the same time, the lifting is completed in an instant, and multiple closing operations can cause the closing mechanism in the air switch to be severely worn, and sometimes the air switch closing mechanism can be damaged due to excessive force. In other embodiments, the power unit 2 can contain more electrical modules, or the number of electrical modules can be correspondingly reduced, and the displacement of the connecting rod 23 is adjusted to match the rotation angle of the roller 31 to complete the lifting of the blade.

[0050] Please refer to Figure 3 and Figure 4 The power unit 2 further comprises a limiting assembly 27, the limiting assembly 27 comprises a limiting electromagnetic coil 271, an armature 272, a limiting column 273 and a reset member 274, the limiting electromagnetic coil 271 is arranged on the shell 11, the limiting electromagnetic coil 271 is located on the upper end surface of the shell 11 and is fixedly connected with the shell 11, the armature 272 is arranged in parallel with the limiting electromagnetic coil 271, one end of the limiting column 273 is fixedly connected with the armature 272, the limiting column 273 is perpendicular to the armature 272 and is in sliding fit with the shell 11, and the reset member 274 is arranged between the upper end surface of the shell 11 and the armature 272, one end of the reset member 274 is fixedly connected with the upper end surface of the shell 11, and the other end is fixedly connected with the armature 272. It can be understood that the limiting electromagnetic coil 271 generates magnetism after being energized, attracts the armature 272 to move towards the direction of the limiting electromagnetic coil 271, and then drives the limiting column 273 to slide with the shell 11, so that the limiting column 273 extends out of the shell 11; the limiting electromagnetic coil 271 is de-energized, the armature 272 is released from the magnetic attraction, and is driven to move away from the limiting electromagnetic coil 271 under the action of the reset member 274, and then drives the limiting column 273 to slide with the shell 11, so that the limiting column 273 is retracted into the shell 11.

[0051] The cover 11 is provided with a plurality of sets of clamping pieces 111, which are respectively arranged in one-to-one correspondence with and abut against the first electrical module 21, the second electrical module 22, the third electrical module 24, and the fourth electrical module 25. The limiting column 273 is provided with a plurality of limiting columns, which are in one-to-one correspondence with the clamping pieces 111 and are arranged on the side of the clamping pieces 111 closer to the fifth electrical module 26. The limiting column 273 abuts against the corresponding clamping piece 111 to limit the movement direction of the first electrical module 21, the second electrical module 22, the third electrical module 24, and the fourth electrical module 25. In this embodiment, the plurality of clamping pieces 111 are symmetrically arranged with the length direction of the cover 11 as the central axis. The clamping piece 111 is installed on the cover 11 through a fixing pin 112. The clamping piece 111 is composed of a first hook portion 113 and a second hook portion 114. The clamping piece 111 takes the fixing pin 112 as the rotation center, and the first hook portion 113 and the second hook portion 114 are respectively located on the two sides of the fixing pin 112. The first hook portion 113 of the clamping piece 111 corresponding to the first electrical module 21 is clamped with the first conductive plate 212. The corresponding limiting column 273 is located on the left side of the second hook portion 114. The first conductive plate 212 and the limiting column 273 arranged corresponding to the first electrical module 21 are located on the same side of the clamping piece 111 arranged corresponding to the first electrical module 21. Similarly, the second electrical module 22, the third electrical module 24, and the fourth electrical module 25 have the same connection relationship with the clamping piece 111, which will not be described here. It can be understood that after the limiting electromagnetic coil 271 is energized, the plurality of limiting columns 273 protrude out of the cover 11 and are respectively located on the left side of the corresponding clamping piece 111. The first hook portion 113 is clamped with the conductive plate in the corresponding electrical module. The corresponding limiting column 273 is located on the left side of the second hook portion 114. At this time, since the second electromagnetic coil 221 in the second electrical module 22 is energized to generate a magnetic force, the first conductive plate 212 in the first electrical module 21 and the third conductive plate 242 in the third electrical module 24 will be simultaneously subjected to the magnetic attraction force. The first electrical module 21 is attracted. The movement of the third electrical module 24 is limited by the cooperation of the limiting column 273 and the clamping piece 111, which avoids the third electrical module 24 from being attracted towards the second electrical module 22. By analogy, the cooperation of the limiting column 273 and the clamping piece ensures that the first electrical module 21 to the fifth electrical module 26 are sequentially attracted in order, so that the displacement of the connecting rod 23 is sequentially generated.

[0052] When the closing operation is completed, i.e. the first stage power mechanism and the second stage power mechanism are all attracted to become a whole, first, the limiting electromagnetic coil 271 is powered off, and the limiting column 273 is retracted into the shell 11 to the original position by the action force of the reset member 274, the limiting column 273 releases the pressing of the clamping member 111, and the clamping member 111 cannot clamp the corresponding electrical module; second, the second electromagnetic coil 221, the third electromagnetic coil 241, the fourth electromagnetic coil 251 and the fifth electromagnetic coil 261 are powered off at the same time, and the electrical modules return to the original position under the rebounding action force of the spring 28, and the connecting rod 23 also returns to the original position, waiting for the next closing.

[0053] Please refer to Figure 1 The power unit 2 and the output unit 3 are provided with two groups, which are symmetrically arranged at two ends of the air switch; the two lever rods 32 are located on the same straight line, and the two lever rods 32 are synchronously rotated to lift the switch blade, the force of the two lever rods 32 is equal and consistent, so that the left and right ends of the switch blade are simultaneously forced, effectively avoiding the operation problem caused by the unbalanced torque, and improving the stability and reliability of the automatic closing operation.

[0054] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit it; although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by the equivalent; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An automatic closing device, characterized in that, The utility model relates to an air switch, comprising: a housing connected to an air switch; a power unit disposed in the housing; an output unit disposed in the housing, the output unit comprising a roller and a lever, the roller being rotatably connected to the housing, one end of the lever being fixedly connected to the roller and the other end being located between the surface of the air switch and a contactor; the power unit drives the roller to rotate to drive the lever to rotate synchronously and lift the contactor.

2. The automatic closing device according to claim 1, characterized in that The power unit is in electrical connection with a power source; the power unit comprises a cover, a first electrical module, a second electrical module and a connecting rod, the cover being fixedly installed on the housing, the first electrical module and the second electrical module being spaced apart, and the first electrical module and the second electrical module being in sliding connection with the cover; a spiral guide groove is formed on the outer circumferential wall of the roller, the connecting rod moves synchronously with the first electrical module, one end of the connecting rod is fitted in the first electrical module, and the other end is located in the spiral guide groove; when the second electrical module is energized, the first electrical module moves towards the second electrical module, thereby driving the connecting rod to displace to drive the roller to rotate.

3. The automatic closing device according to claim 2, characterized in that The first electrical module comprises a first electromagnetic coil and a first conductive plate, the first electromagnetic coil being arranged on the first conductive plate, the second electrical module comprising a second electromagnetic coil and a second conductive plate, the second electromagnetic coil being arranged on the second conductive plate; when the second electromagnetic coil is energized, the second electromagnetic coil generates a magnetic field to magnetically attract the first conductive plate, so that the first electrical module moves towards the second electrical module.

4. The automatic closing device according to claim 2, characterized in that The power unit further comprises a third electrical module, the third electrical module being in sliding connection with the cover and being arranged on the side of the second electrical module away from the first electrical module, the third electrical module being parallel to and spaced apart from the second electrical module; when the third electrical module is energized, the third electrical module drives the first electrical module and the second electrical module to move towards the third electrical module, thereby driving the connecting rod to displace for the second time.

5. An automatic closing device according to claim 4, characterized in that The power unit further comprises a fourth electrical module and a fifth electrical module, the fourth electrical module and the fifth electrical module being arranged on the side of the third electrical module away from the second electrical module, the fourth electrical module and the fifth electrical module being parallel to and spaced apart from the third electrical module, and the fourth electrical module being located between the third electrical module and the fifth electrical module, the fourth electrical module being in sliding connection with the cover; 6. The automatic closing device according to claim 5, characterized in that When the fourth electrical module and the fifth electrical module are energized, the first-stage power mechanism moves towards the fourth electrical module, and at the same time, the fourth electrical module moves towards the fifth electrical module, so that the connecting rod displaces for the third time. ​ 7. An automatic closing device according to claim 6, characterized in that Also include a second time relay, the second time relay is connected with fourth electrical module and fifth electrical module, the third electrical module is energized, the second time relay controls fourth electrical module and fifth electrical module energization;Fourth electrical module and fifth electrical module are configured as second stage power mechanism.

8. The automatic closing device according to claim 6, characterized in that The power unit further comprises a limiting assembly, the limiting assembly comprises a limiting electromagnetic coil, an armature and a limiting column; The limiting electromagnetic coil is arranged in the shell, the armature is arranged in parallel with the limiting electromagnetic coil, one end of the limiting column is fixedly connected with the armature, and the limiting column is perpendicular to the armature and is in sliding fit with the shell.

9. An automatic closing device according to claim 8, characterized in that The shell is provided with a plurality of clamping pieces, and the plurality of clamping pieces are respectively arranged in one-to-one correspondence with the first electrical module, the second electrical module, the third electrical module and the fourth electrical module and are pressed against each other. The limiting column is provided with a plurality of limiting columns, the limiting column is in one-to-one correspondence with the clamping piece, and the limiting column is arranged on the side close to the fifth electrical module, and the plurality of limiting columns are respectively pressed against the corresponding clamping pieces to limit the movement direction and distance of the first electrical module, the second electrical module, the third electrical module and the fourth electrical module.

10. The automatic closing device according to claim 1, characterized in that The power unit and the output unit are provided with two groups, respectively located at both ends of the air switch and symmetrically arranged; Two dials are located on the same straight line, and two dials are synchronously rotated to lift the brake. ​

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