An earthing electromagnetic lock device for a circuit breaker unit of an inflatable cabinet

Abstract

The present invention discloses a grounding electromagnetic lock device for a circuit breaker unit of a gas-insulated switchgear. The grounding electromagnetic lock device for the circuit breaker unit of the gas-insulated switchgear proposed by the present invention solves the problem of potential safety hazards when the grounding switch of the existing switchgear is operated through the operation hole; when the live sensor detects that the high-voltage terminal post is live, the circuit breaker unit closes, and the controller controls the push rod of the push-pull electromagnet to extend, so as to drive the first baffle to move to the first position. At this time, the first baffle blocks the first operation hole, and the operator cannot rotate the operating rod through the first operation hole; when the live sensor detects that the high-voltage terminal post is de-energized, the circuit breaker unit opens, and the controller controls the push rod of the push-pull electromagnet to shorten, so that the first baffle moves to the second position. At this time, the first baffle no longer blocks the first operation hole, and the operator can normally close or open the grounding switch, which is safer.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic interlocks, and particularly to a grounding electromagnetic lock device for a circuit breaker unit of a gas-insulated switchgear (GIS). Background Art

[0002] Existing switchgear includes a circuit breaker unit and an earthing switch. For most incoming switchgear, the incoming line terminal is located at the lower end of the circuit breaker unit. When grounding operation is to be performed on the incoming switchgear, it is necessary to ensure that the circuit breaker unit is powered off before the earthing switch can be safely operated.

[0003] Existing switchgear is provided with an operation hole for operating the earthing switch. By this operation hole, an operating rod can be rotated. Since the operating rod is linked to the earthing switch inside the switchgear, the earthing switch inside the switchgear can be closed or opened by rotating the operating rod. However, the existing operation hole has an open structure, that is, the earthing switch can be operated regardless of whether the circuit breaker unit of the switchgear is opened or closed, which poses a great safety hazard. Summary of the Invention

[0004] The main object of the present invention is to provide a grounding electromagnetic lock device for a circuit breaker unit of a gas-insulated switchgear, aiming to solve the problem that the existing operation hole has an open structure and the earthing switch can be operated regardless of whether the circuit breaker unit of the switchgear is opened or closed.

[0005] To achieve the above object, the technical solution proposed by the present invention is as follows:

[0006] A grounding electromagnetic lock device for an inflatable cabinet circuit breaker unit, comprising a cabinet, a high-voltage terminal, a charged sensor, a controller, a support plate, an operating rod, a first slide rail, a first baffle and a push-pull electromagnet; the operating rod, the controller and the high-voltage terminal are all arranged in the cabinet; the charged sensor is arranged close to the high-voltage terminal to detect whether the high-voltage terminal is charged; the charged sensor and the push-pull electromagnet are both electrically connected to the controller; the controller is used to control the start and stop of the push-pull electromagnet; the support plate is arranged in the cabinet, and the support plate is arranged vertically; the operating rod is used to rotate to open or close the incoming line of the grounding switch arranged in the cabinet; the support plate ... The support plate is provided with a first operating hole; the operating rod is directly opposite to the first operating hole; the first slide rail is vertically arranged on the support plate; the first baffle is slidably connected to the first slide rail; the first baffle is parallel to the support plate; the first baffle includes a first position for blocking the first operating hole, and a second position for not blocking the first operating hole; the controller is used for: when the charged sensor detects that the high-voltage terminal is charged, controlling the push rod of the push-pull electromagnet to extend to drive the first baffle to move to the first position; when the charged sensor detects that the high-voltage terminal is not charged, controlling the push rod of the push-pull electromagnet to shorten to move the first baffle to the second position.

[0007] Preferably, it also includes a first sheave, a second sheave, a cable and a pull rod; the push-pull electromagnet is located below the first baffle; the first sheave and the second sheave are both rotatably arranged on the support plate, and the first sheave and the second sheave are both located above the push-pull electromagnet; the pull rod is slidably connected to the support plate, and the pull rod is located below the push-pull electromagnet; the pull rod is horizontally arranged; the sliding direction of the pull rod is vertical; one end of the cable is connected to the top of the first baffle; the other end of the cable is sequentially wound around the first sheave and the second sheave, and connected to the pull rod; the rotation axes of the first sheave and the second sheave are both horizontally arranged, and the rotation axes of the first sheave and the second sheave are located on the same horizontal line; the push rod of the push-pull electromagnet is connected to the pull rod.

[0008] Preferably, it also includes a second slide rail; the second slide rail is vertically arranged on the support plate, and the second slide rail is located on the side of the first operating hole away from the first slide rail; the two ends of the pull rod are respectively slidably connected to the first slide rail and the second slide rail.

[0009] Preferably, the cross-sections of the first slide rail and the second slide rail are both trapezoidal; the first baffle is provided with a first chute; the cross-section of the first chute is trapezoidal; the first baffle is slidably sleeved on the first slide rail through the first chute; both ends of the pull rod are respectively provided with a second chute and a third chute; the cross-sections of the second chute and the third chute are both trapezoidal; the pull rod is sleeved on the first slide rail through the second chute and sleeved on the second slide rail through the third chute.

[0010] Preferably, it further includes a first flap, a second flap and a first spring; the first flap is vertically connected to the support plate, and the first flap is located above the first baffle; the second flap is vertically connected to the top of the first baffle; both the first flap and the second flap are horizontally arranged, and the first flap and the second flap are directly opposite to each other; one end of the first spring is connected to the first flap, and the other end of the first spring is connected to the second flap; the first spring is in a compressed state; the elastic force of the first spring causes the first baffle to have a tendency to descend.

[0011] Preferably, it further includes a connecting rod and a stop block; the bottom end of the connecting rod is connected to the second flap, and the top end of the connecting rod movably passes through the first flap; the connecting rod is vertically arranged; the first spring is sleeved on the connecting rod; the stop block is connected to the support plate, and the stop block is located between the push-pull electromagnet and the first baffle; the stop block is used to abut against the bottom of the first baffle.

[0012] Preferably, it further includes a cabinet door; the cabinet door is used to close the cabinet body; the cabinet door is provided with a second operation hole; when the cabinet door is closed; the second operation hole is directly opposite to the first operation hole.

[0013] Preferably, it further includes a first connecting plate, a second baffle, a second connecting plate and a locking plate; the first connecting plate is vertically connected to the inner wall of the cabinet door; the first connecting plate is vertically arranged; the locking plate is connected to the first connecting plate; the locking plate is parallel to the cabinet door; when the cabinet door is closed, the locking plate is parallel to the support plate; the second connecting plate is vertically connected to the first baffle; the second connecting plate is vertically arranged; the second baffle is connected to the second connecting plate, and the second baffle is parallel to the first baffle; when the cabinet door is closed and the first baffle is in the first position, the second baffle abuts against the side of the locking plate facing the cabinet door to lock the cabinet door; when the first baffle is in the second position, the second baffle does not abut against the locking plate to release the cabinet door.

[0014] Preferably, the upper side edge of the second baffle is connected with an inclined plate; the inclined plate is inclined away from the support plate.

[0015] Preferably, the cabinet body includes a side plate arranged vertically; the device further includes a first slide bar, a second slide bar, a second spring, a third spring, a third baffle, a fourth baffle and a force-receiving plate; the first slide bar and the second slide bar are both perpendicularly connected to the side plate, and the first slide bar and the second slide bar are both horizontally arranged; the upper part of the support plate is slidably sleeved on the first slide bar, and the lower part of the support plate is slidably sleeved on the second slide bar;

[0016] The third baffle is connected to one end of the first slide bar away from the side plate; the second spring is sleeved on the first slide bar, one end of the second spring is connected to the third baffle, and the other end of the second spring is connected to the support plate; the fourth baffle is connected to one end of the second slide bar away from the side plate; the third spring is sleeved on the second slide bar, one end of the third spring is connected to the fourth baffle, and the other end of the third spring is connected to the support plate; the second spring and the third spring are both in a compressed state so that the support plate abuts against the inner wall of the side plate;

[0017] The support plate is provided with a third operation hole; the third operation hole and the operation rod are at the same height; the third operation hole is located between the first baffle and the side plate; the force-receiving plate is connected to one side of the support plate close to the side plate, and the force-receiving plate is arranged vertically; the side plate is provided with a through hole penetrating laterally; the through hole is directly opposite to the force-receiving plate; the support plate can horizontally move until the third operation hole is directly opposite to the operation rod.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] The grounding electromagnetic lock device for the circuit breaker unit of the gas-insulated switchgear proposed by the present invention solves the problem of potential safety hazards when the existing switchgear operates the grounding switch through the operation hole. Specifically, when the live sensor detects that the high-voltage terminal post is live, it means that the incoming line cabinet is in the energized state at this time, that is, the circuit breaker unit is closed. At this time, it is strictly prohibited to operate the grounding switch. Therefore, the controller controls the push rod of the push-pull electromagnet to extend, so as to drive the first baffle to move to the first position. At this time, the first baffle blocks the first operation hole, and the operator cannot pass through the first operation hole to rotate the operating rod, so as to operate the grounding switch, which is safer. When the live sensor detects that the high-voltage terminal post is not live, it means that the incoming line cabinet is in the de-energized state at this time, that is, the circuit breaker unit is open. At this time, the grounding switch can be operated. Therefore, the controller controls the push rod of the push-pull electromagnet to shorten, so that the first baffle moves to the second position. At this time, the first baffle no longer blocks the first operation hole, and the operator can normally pass through the first operation hole to rotate the operating rod, so as to close or open the grounding switch. In summary, it can be seen that the grounding electromagnetic lock device for the circuit breaker unit of the gas-insulated switchgear can only operate the grounding switch when the circuit breaker unit in the cabinet is open, which is safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0021] Figure 1 FIG. is a schematic structural diagram of an embodiment of the grounding electromagnetic lock device for the circuit breaker unit of the gas-insulated switchgear proposed by the present invention;

[0022] Figure 2 is Figure 1 a detailed enlarged view of part A in (the first baffle is in the first position);

[0023] Figure 3 is Figure 1 a detailed enlarged view of part A in (the first baffle is in the second position);

[0024] Figure 4 FIG. is a schematic structural diagram of another state of the support plate in an embodiment of the grounding electromagnetic lock device for the circuit breaker unit of the gas-insulated switchgear proposed by the present invention.

[0025] Description of the reference numerals:

[0026] 110, Cabinet body; 120, Cabinet door; 130, Side plate; 140, Second operation hole; 150, Support plate; 160, First baffle; 170, First slide rail; 180, Second slide rail; 190, Push-pull electromagnet; 210, Pull rod; 220, Push rod; 230, First sheave; 240, Second sheave; 250, Cable; 260, Ventilation pipe; 270, Ventilation opening; 280, Through hole; 290, Force-bearing plate; 310, Second retaining piece; 320, First retaining piece; 330, First spring; 340, Connecting rod; 350, First operation hole; 360, Operating rod; 370, Third operation hole; 380, Stopper; 390, First slide bar; 410, Second spring; 420, Third baffle; 430, Second slide bar; 440, Third spring; 450, Fourth baffle; 460, Second connecting plate; 470, Second baffle; 480, Inclined plate.

[0027] The realization, functional features and advantages of the purpose of the present invention will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0030] In addition, the descriptions such as "first" and "second" in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0031] In the present invention, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In addition, the technical solutions between various embodiments of the present invention can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions conflicts with each other or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0033] The present invention provides a grounding electromagnetic lock device for a circuit breaker unit of a gas-insulated switchgear.

[0034] Please refer to the attached Figure 1 - attached Figure 4 , in an embodiment of the grounding electromagnetic lock device for a circuit breaker unit of a gas-insulated switchgear proposed by the present invention, the grounding electromagnetic lock device for this gas-insulated switchgear circuit breaker unit includes a cabinet body 110, a high-voltage terminal (not shown), a live sensor (not shown), a controller (not shown), a support plate 150, an operating rod 360, a first slide rail 170, a first baffle 160, and a push-pull electromagnet 190; the operating rod 360, the controller, and the high-voltage terminal are all arranged inside the cabinet body 110; the live sensor is arranged close to the high-voltage terminal to detect whether the high-voltage terminal is live (this is prior art and will not be elaborated here); both the live sensor and the push-pull electromagnet 190 are electrically connected to the controller (the controller here is preferably a single-chip microcomputer); the controller is used to control the start and stop of the push-pull electromagnet 190; the support plate 150 is arranged inside the cabinet body 110, and the support plate 150 is arranged vertically; the operating rod 360 is used to rotate to perform opening or closing operations on the grounding switch incoming line arranged inside the cabinet body 110 (this is prior art and will not be elaborated here).

[0035] The support plate 150 is provided with a first operation hole 350 (the first operation hole 350 is a circular hole); the operation rod 360 is directly opposite to the first operation hole 350; the first slide rail 170 is vertically arranged on the support plate 150; the first baffle 160 is slidably connected to the first slide rail 170; the first baffle 160 is parallel to the support plate 150; the first baffle 160 includes a first position that blocks the first operation hole 350 and a second position that does not block the first operation hole 350; the controller is configured to: when the live sensor detects that the high-voltage terminal is live, control the push rod 220 of the push-pull electromagnet 190 to extend, so as to drive the first baffle 160 to move to the first position; when the live sensor detects that the high-voltage terminal is not live, control the push rod 220 of the push-pull electromagnet 190 to shorten, so that the first baffle 160 moves to the second position.

[0036] The grounding electromagnetic lock device for the circuit breaker unit of the gas-insulated switchgear proposed by the present invention solves the problem of potential safety hazards when the existing switchgear operates the grounding switch through the operation hole; specifically, when the live sensor detects that the high-voltage terminal is live, it means that the incoming line cabinet is in the energized state at this time, that is, the circuit breaker unit is closed. At this time, it is strictly prohibited to operate the grounding switch. Therefore, the controller controls the push rod 220 of the push-pull electromagnet 190 to extend (as shown in the attachment Figure 2 ), so as to drive the first baffle 160 to move to the first position. At this time, the first baffle 160 blocks the first operation hole 350, and the operator cannot pass through the first operation hole 350 to rotate the operation rod 360, so as to operate the grounding switch, which is safer.

[0037] When the live sensor detects that the high-voltage terminal is not live, it means that the incoming line cabinet is in the de-energized state at this time, that is, the circuit breaker unit is open. At this time, the grounding switch can be operated. Therefore, the controller controls the push rod 220 of the push-pull electromagnet 190 to shorten, so that the first baffle 160 moves to the second position. At this time, the first baffle 160 no longer blocks the first operation hole 350, and the operator can normally pass through the first operation hole 350 to rotate the operation rod 360, so as to close or open the grounding switch; in summary, it can be seen that the grounding electromagnetic lock device for the circuit breaker unit of the gas-insulated switchgear can only operate the grounding switch when the circuit breaker unit in the cabinet 110 is open, which is safer.

[0038] In addition, the grounding electromagnetic lock device for the circuit breaker unit of this gas-insulated switchgear further includes a first sprocket 230, a second sprocket 240, a cable 250, and a pull rod 210; the push-pull electromagnet 190 is located below the first baffle 160; the first sprocket 230 and the second sprocket 240 are both rotatably arranged on the support plate 150, and both the first sprocket 230 and the second sprocket 240 are located above the push-pull electromagnet 190; the pull rod 210 is slidably connected to the support plate 150, and the pull rod 210 is located below the push-pull electromagnet 190; the pull rod 210 is horizontally arranged; the sliding direction of the pull rod 210 is the vertical direction; one end of the cable 250 is connected to the top of the first baffle 160; the other end of the cable 250 is sequentially wound around the first sprocket 230 and the second sprocket 240, and is connected to the pull rod 210; the rotation axes of the first sprocket 230 and the second sprocket 240 are both horizontally arranged, and the rotation axes of the first sprocket 230 and the second sprocket 240 are on the same horizontal line; the push rod 220 of the push-pull electromagnet 190 is connected to the pull rod 210.

[0039] Specifically, when the live sensor detects that the high-voltage terminal is live, it means that the incoming line cabinet is in the energized state at this time. The controller controls the push rod 220 of the push-pull electromagnet 190 to extend, so as to drive the pull rod 210 to descend, drive the cable 250 to move, and thus pull the first baffle 160 upward. Finally, the first baffle 160 moves to the first position, and at this time, the first baffle 160 blocks the first operation hole 350; when the live sensor detects that the high-voltage terminal is de-energized, it means that the incoming line cabinet is in the de-energized state at this time. The controller controls the push rod 220 of the push-pull electromagnet 190 to shorten, so as to drive the pull rod 210 to rise, drive the cable 250 to move, and the first baffle 160 descends under the action of its own weight, so that the first baffle 160 moves to the second position, and at this time, the first baffle 160 no longer blocks the first operation hole 350.

[0040] Meanwhile, the grounding electromagnetic lock device for the circuit breaker unit of this gas-insulated switchgear further includes a second slide rail 180; the second slide rail 180 is vertically arranged on the support plate 150, and the second slide rail 180 is located on the side of the first operation hole 350 away from the first slide rail 170; both ends of the pull rod 210 are slidably connected to the first slide rail 170 and the second slide rail 180 respectively.

[0041] Specifically, the cross-sections of the first slide rail 170 and the second slide rail 180 are both trapezoidal; the first baffle 160 is provided with a first chute (not shown); the cross-section of the first chute is trapezoidal; the first baffle 160 is slidably sleeved on the first slide rail 170 through the first chute; both ends of the pull rod 210 are respectively provided with a second chute (not shown) and a third chute (not shown); the cross-sections of the second chute and the third chute are both trapezoidal; the pull rod 210 is sleeved on the first slide rail 170 through the second chute, and is sleeved on the second slide rail 180 through the third chute.

[0042] Through the above technical solution, the structure and function of the grounding electromagnetic lock device for the circuit breaker unit of the gas-insulated switchgear are improved; by setting the cross-section of the first slide rail 170 as a trapezoid and the first chute as trapezoidal, it can prevent the first baffle 160 from flipping during the lifting process.

[0043] In addition, the grounding electromagnetic lock device for the circuit breaker unit of the gas-insulated switchgear further includes a first retaining piece 320, a second retaining piece 310 and a first spring 330; the first retaining piece 320 is vertically connected to the support plate 150, and the first retaining piece 320 is located above the first baffle 160; the second retaining piece 310 is vertically connected to the top of the first baffle 160; both the first retaining piece 320 and the second retaining piece 310 are horizontally arranged, and the first retaining piece 320 and the second retaining piece 310 are directly opposite; one end of the first spring 330 is connected to the first retaining piece 320, and the other end of the first spring 330 is connected to the second retaining piece 310; the first spring 330 is in a compressed state; the elastic force of the first spring 330 causes the first baffle 160 to have a tendency to descend.

[0044] By setting the first retaining piece 320, the second retaining piece 310 and the first spring 330, when the charged sensor detects that the high-voltage terminal is de-energized, it indicates that the incoming line cabinet is in a de-energized state at this time. The controller controls the push rod 220 of the push-pull electromagnet 190 to shorten, so as to drive the pull rod 210 to rise, drive the cable 250 to move, and the first baffle 160 descends under the action of its own weight and the elastic force of the first spring 330, so that the first baffle 160 moves to the second position, and at this time the first baffle 160 no longer blocks the first operation hole 350.

[0045] Specifically, the grounding electromagnetic lock device for the circuit breaker unit of the gas-insulated switchgear further includes a connecting rod 340 and a stop block 380; the bottom end of the connecting rod 340 is connected to the second retaining piece 310, and the top end of the connecting rod 340 movably passes through the first retaining piece 320; the connecting rod 340 is vertically arranged; the first spring 330 is sleeved on the connecting rod 340; the stop block 380 is connected to the support plate 150, and the stop block 380 is located between the push-pull electromagnet 190 and the first baffle 160; the stop block 380 is used to abut against the bottom of the first baffle 160. By setting the connecting rod 340, the position of the first spring 330 can be maintained.

[0046] In addition, the grounding electromagnetic lock device for the circuit breaker unit of the gas-insulated switchgear further includes a cabinet door 120; the cabinet door 120 is used to close the cabinet body 110; the cabinet door 120 is provided with a second operation hole 140; when the cabinet door 120 is closed; the second operation hole 140 is directly opposite to the first operation hole 350. So as to facilitate the operator to rotate the operating rod 360 through the second operation hole 140.

[0047] Meanwhile, the grounding electromagnetic lock device for the circuit breaker unit of this gas-insulated switchgear cabinet further includes a first connecting plate (not shown), a second baffle 470, a second connecting plate 460, and a locking plate (not shown); the first connecting plate is vertically connected to the inner wall of the cabinet door 120; the first connecting plate is vertically arranged; the locking plate is connected to the first connecting plate; the locking plate is parallel to the cabinet door 120; when the cabinet door 120 is closed, the locking plate is parallel to the support plate 150, and the locking plate is located between the cabinet door 120 and the support plate 150; the second connecting plate 460 is vertically connected to the first baffle 160; the second connecting plate 460 is vertically arranged; the second baffle 470 is connected to the second connecting plate 460, and the second baffle 470 is parallel to the first baffle 160; when the cabinet door 120 is closed and the first baffle 160 is in the first position, the second baffle 470 abuts against the side of the locking plate facing the cabinet door 120 to lock the cabinet door 120; when the first baffle 160 is in the second position, the second baffle 470 does not abut against the locking plate to release the cabinet door 120.

[0048] Specifically, since the circuit breaker unit needs to be closed to be switched on, which is safer. Therefore, when the cabinet door 120 is closed and the circuit breaker unit is switched on, because the high-voltage terminal post is energized, the push-pull electromagnet 190 will drive the first baffle 160 to move to the first position. At this time, the second baffle 470 abuts against the side of the locking plate facing the cabinet door 120 to lock the cabinet door 120, which can prevent the cabinet door 120 from being accidentally opened and is safer; that is, when the high-voltage terminal post is energized, the cabinet door 120 cannot be opened; and when the circuit breaker unit is switched off, the first baffle 160 is in the second position, and at this time, the second baffle 470 does not abut against the locking plate, and the cabinet door 120 can be opened.

[0049] Specifically, an inclined plate 480 is connected to the upper side edge of the second baffle 470; the inclined plate 480 is inclined away from the support plate 150. With this setting, the second baffle 470 can move upward more smoothly to abut against the locking plate.

[0050] In addition, the cabinet body 110 includes a vertically arranged side plate 130; this device further includes a first sliding rod 390, a second sliding rod 430, a second spring 410, a third spring 440, a third baffle 420, a fourth baffle 450, and a stress plate 290; the first sliding rod 390 and the second sliding rod 430 are both vertically connected to the side plate 130, and the first sliding rod 390 and the second sliding rod 430 are both horizontally arranged; the upper part of the support plate 150 is slidably sleeved on the first sliding rod 390, and the lower part of the support plate 150 is slidably sleeved on the second sliding rod 430.

[0051] The third baffle 420 is connected to one end of the first slide bar 390 away from the side plate 130; the second spring 410 is sleeved on the first slide bar 390, one end of the second spring 410 is connected to the third baffle 420, and the other end of the second spring 410 is connected to the support plate 150; the fourth baffle 450 is connected to one end of the second slide bar 430 away from the side plate 130; the third spring 440 is sleeved on the second slide bar 430, one end of the third spring 440 is connected to the fourth baffle 450, and the other end of the third spring 440 is connected to the support plate 150; both the second spring 410 and the third spring 440 are in a compressed state, so that the support plate 150 abuts against the inner wall of the side plate 130.

[0052] The support plate 150 is provided with a third operation hole 370; the third operation hole 370 and the operation rod 360 are at the same height; the third operation hole 370 is located between the first baffle 160 and the side plate 130; the force receiving plate 290 is connected to one side of the support plate 150 close to the side plate 130, and the force receiving plate 290 is vertically arranged; the side plate 130 is provided with a laterally penetrating through hole 280; the through hole 280 is directly opposite to the force receiving plate 290; the support plate 150 can be horizontally moved until the third operation hole 370 is directly opposite to the operation rod 360.

[0053] Through the above technical solution, the earthing switch can be operated in an emergency. For example, when the live sensor fails, causing the push-pull electromagnet 190 to always extend, resulting in the situation that even if the circuit breaker unit is tripped, the earthing switch still cannot be operated. In this case, a rod-shaped object can be inserted into the through hole 280 and abutted against the force receiving plate 290, and then the support plate 150 is pushed to move away from the side plate 130. Finally, the third operation hole 370 is directly opposite to the operation rod 360. At this time, the operation rod 360 can be rotated through the third operation hole 370 to trip or close the earthing switch.

[0054] Specifically, the earthing electromagnetic lock device for the circuit breaker unit of the gas-insulated switchgear further includes a ventilation pipe 260 arranged on the support plate 150; the ventilation pipe 260 is a rectangular pipe; the first slide rail 170 passes through the ventilation pipe 260; the ventilation pipe 260 covers the push-pull electromagnet 190, and the push rod 220 of the push-pull electromagnet 190 extends out of the ventilation pipe 260; the ventilation pipe 260 includes an air inlet and an air outlet; a fan (not shown) is arranged at the air inlet; the side plate 130 is provided with a ventilation opening 270 directly opposite to the air outlet; the ventilation opening 270 is embedded with a grille (not shown).

[0055] By arranging the ventilation pipe 260, the fan blows air to the push-pull electromagnet 190, thereby ventilating and cooling the push-pull electromagnet 190 to reduce the operating temperature of the push-pull electromagnet 190 and prevent damage to the electromagnet body caused by the high temperature generated by the coil of the push-pull electromagnet 190 being energized for a long time.

[0056] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields shall be included in the patent protection scope of the present invention.

Claims

1. A grounding electromagnetic lock device for a circuit breaker unit of an inflatable cabinet, characterized in that, It includes a cabinet, a high-voltage terminal, a charged sensor, a controller, a support plate, an operating rod, a first slide rail, a first baffle and a push-pull electromagnet; the operating rod, the controller and the high-voltage terminal are all arranged in the cabinet; the charged sensor is arranged close to the high-voltage terminal to detect whether the high-voltage terminal is charged; the charged sensor and the push-pull electromagnet are both electrically connected to the controller; the controller is used to control the start and stop of the push-pull electromagnet; the support plate is arranged in the cabinet, and the support plate is arranged vertically; the operating rod is used to rotate to open or close the incoming line of the grounding switch arranged in the cabinet; the support plate is provided with a first operating hole; the operating rod is directly opposite to the first operating hole; the first slide rail is vertically arranged on the support plate; the first baffle is slidably connected to the first slide rail; the first baffle is parallel to the support plate; the first baffle includes a first position that blocks the first operating hole, and a second position that does not block the first operating hole; the controller is used to: when the charged sensor detects that the high-voltage terminal is charged, control the push rod of the push-pull electromagnet to extend to drive the first baffle to move to the first position; when the charged sensor detects that the high-voltage terminal is not charged, control the push rod of the push-pull electromagnet to shorten to move the first baffle to the second position; It also includes a first sheave, a second sheave, a cable and a pull rod; the push-pull electromagnet is located below the first baffle; the first sheave and the second sheave are both rotatably arranged on the support plate, and the first sheave and the second sheave are both located above the push-pull electromagnet; the pull rod is slidably connected to the support plate, and the pull rod is located below the push-pull electromagnet; the pull rod is horizontally arranged; the sliding direction of the pull rod is vertical; one end of the cable is connected to the top of the first baffle; the other end of the cable is sequentially wound around the first sheave and the second sheave, and connected to the pull rod; the rotation axes of the first sheave and the second sheave are both horizontally arranged, and the rotation axes of the first sheave and the second sheave are located on the same horizontal line; the push rod of the push-pull electromagnet is connected to the pull rod; When the live sensor detects that the high-voltage terminal is live, the controller controls the push rod of the push-pull electromagnet to extend to drive the pull rod down, drive the cable to move, and pull the first baffle upward, so that the first baffle moves to the first position; when the live sensor detects that the high-voltage terminal is powered off, the controller controls the push rod of the push-pull electromagnet to shorten to drive the pull rod up, drive the cable to move, and the first baffle moves down to the second position under the action of its own weight; It also includes a second slide rail; the second slide rail is vertically arranged on the support plate, and the second slide rail is located on the side of the first operating hole away from the first slide rail; both ends of the pull rod are slidably connected to the first slide rail and the second slide rail respectively; It further includes a first baffle, a second baffle and a first spring; the first baffle is vertically connected to the support plate, and the first baffle is located above the first baffle plate; the second baffle is vertically connected to the top of the first baffle plate; both the first baffle and the second baffle are horizontally arranged, and the first baffle and the second baffle face each other directly; one end of the first spring is connected to the first baffle, and the other end of the first spring is connected to the second baffle; the first spring is in a compressed state; the elastic force of the first spring causes the first baffle plate to have a tendency to descend; The cabinet body includes vertically arranged side plates; the device further includes a first sliding rod, a second sliding rod, a second spring, a third spring, a third baffle plate, a fourth baffle plate and a force-bearing plate; both the first sliding rod and the second sliding rod are vertically connected to the side plates, and both the first sliding rod and the second sliding rod are horizontally arranged; the upper part of the support plate is slidably sleeved on the first sliding rod, and the lower part of the support plate is slidably sleeved on the second sliding rod; The third baffle plate is connected to the end of the first sliding rod away from the side plate; the second spring is sleeved on the first sliding rod, one end of the second spring is connected to the third baffle plate, and the other end of the second spring is connected to the support plate; the fourth baffle plate is connected to the end of the second sliding rod away from the side plate; the third spring is sleeved on the second sliding rod, one end of the third spring is connected to the fourth baffle plate, and the other end of the third spring is connected to the support plate; both the second spring and the third spring are in a compressed state, so that the support plate abuts against the inner wall of the side plate; The support plate is provided with a third operation hole; the third operation hole and the operating rod are at the same height; the third operation hole is located between the first baffle plate and the side plate; the force-bearing plate is connected to the side of the support plate close to the side plate, and the force-bearing plate is vertically arranged; the side plate is provided with a laterally penetrating through hole; the through hole faces the force-bearing plate directly; the support plate can be horizontally moved until the third operation hole faces the operating rod directly.

2. The grounding electromagnetic lock device for the circuit breaker unit of the gas-insulated switchgear according to claim 1, characterized in that, The cross-sections of both the first slide rail and the second slide rail are trapezoidal; the first baffle plate is provided with a first chute; the cross-section of the first chute is trapezoidal; the first baffle plate is slidably sleeved on the first slide rail through the first chute; both ends of the pull rod are respectively provided with a second chute and a third chute; the cross-sections of both the second chute and the third chute are trapezoidal; the pull rod is sleeved on the first slide rail through the second chute and sleeved on the second slide rail through the third chute.

3. The grounding electromagnetic lock device for the circuit breaker unit of the gas-insulated switchgear according to claim 1, wherein, It further includes a connecting rod and a stopper; the bottom end of the connecting rod is connected to the second baffle, and the top end of the connecting rod movably passes through the first baffle; the connecting rod is vertically arranged; the first spring is sleeved on the connecting rod; the stopper is connected to the support plate, and the stopper is located between the push-pull electromagnet and the first baffle plate; the stopper is used to abut against the bottom of the first baffle plate.

4. The grounding electromagnetic lock device for the circuit breaker unit of the gas-insulated switchgear according to claim 1, characterized in that, It further includes a cabinet door; the cabinet door is used to close the cabinet body; the cabinet door is provided with a second operation hole; when the cabinet door is closed, the second operation hole is directly opposite to the first operation hole.

5. The grounding electromagnetic lock device for the circuit breaker unit of the gas-insulated switchgear according to claim 4, characterized in that, It further includes a first connecting plate, a second baffle, a second connecting plate and a locking plate; the first connecting plate is vertically connected to the inner wall of the cabinet door; the first connecting plate is arranged vertically; the locking plate is connected to the first connecting plate; the locking plate is parallel to the cabinet door; when the cabinet door is closed, the locking plate is parallel to the support plate; the second connecting plate is vertically connected to the first baffle; the second connecting plate is arranged vertically; the second baffle is connected to the second connecting plate, and the second baffle is parallel to the first baffle; when the cabinet door is closed and the first baffle is in the first position, the second baffle abuts against the side of the locking plate facing the cabinet door to lock the cabinet door; when the first baffle is in the second position, the second baffle does not abut against the locking plate to release the cabinet door.

6. The grounding electromagnetic lock device for the circuit breaker unit of the gas-insulated switchgear according to claim 5, characterized in that, An inclined plate is connected to the upper side edge of the second baffle; the inclined plate inclines away from the support plate.

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