Grounding switch interlocking device for double-locking sealing plate

Abstract

The utility model provides a grounding switch interlocking device used for a double-locking sealing plate, and relates to the technical field of switch cabinets, the switch cabinet comprises a cabinet body, a sealing plate and a grounding switch, the cabinet body is provided with a left side plate and a right side plate, the sealing plate is arranged between the left side plate and the right side plate, and the interlocking device comprises a transmission assembly, an interlocking box, a first locking plate, a latch assembly and a second locking plate; the first locking plate is mounted on the surface, close to the right side plate, of the sealing plate; the interlocking box is mounted on one side, facing the left side plate, of the right side plate and is in transmission connection with the transmission assembly; the transmission assembly is arranged between the cabinet body and the right side plate, is driven by the grounding switch and performs switching action for controlling the locking and unlocking of the interlocking box; the second locking plate is mounted on one side, facing the right side plate, of the left side plate and is provided with a positioning insertion hole; and the latch assembly is linked with the interlocking box to form a latch body. According to the utility model, the safety performance of the switch cabinet can be obviously improved, the accident rate is reduced, and the safe operation of an electric power system is powerfully guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of switch cabinets, in particular to a grounding switch interlocking device for double locking sealing plates. Background Art

[0002] In the power system, the safe operation of the switchgear is crucial to ensure the stability of the power grid and the safety of personnel. As an important component of the switchgear, the grounding switch is mainly used to achieve grounding protection in the circuit. Therefore, it is required that the cabinet door is opened to allow maintenance personnel to enter the compartment only after the grounding switch is closed. Correspondingly, the grounding switch is only allowed to be opened when the cabinet door is closed. An interlocking device is usually installed between the grounding switch and the cabinet door to ensure the safety of equipment and personnel.

[0003] However, the traditional switchgear grounding switch interlocking device is mostly a single-point locking design, which can meet basic safety requirements in most cases. However, when the switchgear door adopts a non-hinged cover plate design, the single-point locking design may cause interlock failure. Under this structure, the opening of the other side of the cover plate cannot be effectively restricted by only a single-point locking, which greatly increases the risk of misoperation. Once a misoperation occurs, it may not only cause damage to the interlocking device, but also cause serious damage to equipment and personnel.

[0004] Therefore, in order to solve the above problems, the utility model proposes a novel grounding switch interlocking device for double locking sealing plates, which is used to improve the safety and reliability of the grounding switch interlocking device of the switch cabinet. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model aims to provide a grounding switch interlocking device for double locking sealing plates, and the specific scheme is as follows:

[0006] A grounding switch interlocking device for double locking cover plates, the switch cabinet comprises a cabinet body, a cover plate, and a grounding switch, the cabinet body is provided with a left plate and a right plate which are arranged opposite to each other, the cover plate is arranged between the left plate and the right plate, the interlocking device comprises a transmission assembly, an interlocking box, a first locking plate, a latch assembly, and a second locking plate;

[0007] A first locking plate is mounted on a surface of the sealing plate close to the right side plate, and a limiting portion is formed on a side away from the sealing plate;

[0008] An interlock box is installed on the side of the right plate facing the left plate, and is in transmission connection with the transmission assembly, and is used to lock the limit portion when the sealing plate is in a closed state, and is used to pause the transmission assembly when the sealing plate is in an open state;

[0009] The transmission assembly is installed between the cabinet and the right side panel and is driven by the grounding switch to control the switching action of locking and unlocking the interlock box;

[0010] A second locking plate is installed on the side of the left plate facing the right plate and is provided with a positioning hole;

[0011] The latch assembly is linked with the interlock box to form a latch body. When the sealing plate is in a closed state and the earthing switch is in an open state, the interlock box is driven by the transmission assembly, and the latch body can be inserted into the positioning socket in a direction away from the interlock box. When the earthing switch is in a closed state, the interlock box is driven by the transmission assembly, and the latch body can be disengaged from the positioning socket in a direction close to the interlock box.

[0012] Therefore, this interlocking device can realize that the cover plate is allowed to be opened only when the grounding switch is closed, and the cover plate adopts a double-locking design to avoid interlocking failure. Correspondingly, the grounding switch is allowed to be opened only when the cover plate is closed.

[0013] Specifically, when the cover plate of the switch cabinet is in the closed state, the grounding switch can be opened. When it is in the open position, the transmission assembly controls the interlock box to switch from unlocking to locking under the drive of the grounding switch, that is, the interlock box locks the limit part on the first locking plate, thereby realizing the right side locking function of the right side plate on the cover plate. At the same time, the latch assembly linked to the interlock box reacts, that is, the latch body on the latch assembly is inserted into the positioning socket in the direction away from the interlock box, thereby realizing the left side locking function of the left side plate on the cover plate. Therefore, when the cover plate is in the closed state, the left and right sides of the switch cabinet are in a double-sided locked state and cannot be opened, thereby ensuring the safety of equipment and personnel.

[0014] Afterwards, if it is necessary to open the sealing plate to allow maintenance personnel to enter the interval, the grounding switch can be operated to close the switch. Under the drive of the grounding switch, the transmission component controls the interlock box from locked to unlocked, that is, the interlock box unlocks the limit part on the first locking plate, thereby releasing the right side locking function of the right side plate on the sealing plate. At the same time, the latch assembly linked to the interlock box reacts, that is, the latch body on the latch assembly is disengaged from the positioning socket in the direction close to the interlock box, thereby releasing the left side locking function of the left side plate on the sealing plate. At this time, the sealing plate can be safely opened to allow maintenance personnel to enter the interval.

[0015] Further, the interlocking device also includes an unlocking plate;

[0016] The unlocking plate is installed on the side of the first locking plate away from the sealing plate and is spaced apart from the limiting portion. When the sealing plate is in an open state, it is used to cooperate with the interlocking box to pause the switching action of the transmission component. When the sealing plate is in a closed state, it is used to cooperate with the interlocking box to unlock the pause action of the transmission component.

[0017] Therefore, by setting an unlocking plate, when the cover plate is in the open state, the unlocking plate can control the transmission component to be unable to transmit, that is, suspend the switching action of controlling the locking and unlocking of the interlock box. At this time, the proximity switch opening operation is also blocked. This design ensures that the transmission component can transmit normally only when the cover plate is in the closed state, that is, the unlocking plate unlocks the suspension action of the transmission component, thereby allowing the grounding switch to be operated for opening.

[0018] In this way, the safety requirement of allowing the grounding switch to open only when the cover is closed can be achieved.

[0019] Further, the interlock box includes a box body, a lock body, a first spring, a second spring, a special-shaped pin, and a guide column;

[0020] The box body is detachably fixedly connected to the right side plate, the special-shaped pin is coaxially connected to the guide column and is respectively slidably penetrated through the two sides of the box body, and the guide column penetrates the right side plate, the first spring is sleeved between the special-shaped pin and the guide column, the special-shaped pin is used to cooperate with the unlocking plate, and the guide column is used to cooperate with the transmission assembly;

[0021] The lock body consists of a round pin and a lock plate welded on the round pin. The lock plate passes through the box body along the direction toward the first locking plate and forms a locking groove for cooperating with the limiting part. The round pin passes through the box body along the direction toward the right side plate and forms a pressure column for cooperating with the transmission assembly. The second spring is sleeved on the round pin.

[0022] Therefore, when the cover plate of the switch cabinet is in the closed state and the grounding switch is in the open state, the lock body maintains a position close to the right side plate under the elastic force of the second spring, so that the lock plate successfully hooks the limit part on the first locking plate, thereby realizing the right side locking function. At the same time, the unlocking plate is inserted into the limit hole of the special-shaped pin, so that it is kept at a position away from the right side plate, and the guide column no longer cooperates with the transmission assembly, and the grounding switch can be operated to close the switch.

[0023] Furthermore, a limiting hole is provided at the end of the special-shaped pin exposed outside the box body, and a wedge-shaped pushing portion is formed at the end of the unlocking plate, and the wedge-shaped pushing portion is used to extend into the limiting hole.

[0024] Therefore, when the sealing plate is closed, the unlocking plate can be squeezed into the limiting hole in the special-shaped pin by means of the wedge-shaped pushing portion, and when the sealing plate is opened, the unlocking plate can also be easily removed from the limiting hole.

[0025] Furthermore, the transmission assembly includes a transmission shaft, a card wheel and an eccentric wheel;

[0026] The transmission shaft can rotate forward and reverse around its own axis and is connected to the grounding switch drive. Its two ends are respectively connected to the cabinet and the right side plate for rotation;

[0027] The clamping wheel is coaxially mounted on one end of the transmission shaft close to the right side plate, and has two clamping grooves symmetrically arranged along its radial direction for clamping the guide column;

[0028] The eccentric wheel is eccentrically mounted on one end of the transmission shaft close to the right side plate and is arranged adjacent to the clamping wheel for pushing the pressure column.

[0029] Therefore, by controlling the rotation direction and angle of the transmission shaft, it is possible to control whether the clamping wheel clamps the guide column and whether the eccentric wheel pushes the pressure column, thereby controlling the locking and unlocking of the interlocking box and controlling the unlocking plate to lock or unlock the transmission assembly.

[0030] Furthermore, the door latch assembly also includes a guide support plate 1 and an elastic linkage structure;

[0031] The guide support plate 1 is installed on the side wall of the sealing plate, and the door latch body and the elastic linkage structure are slidably arranged on the guide support plate 1;

[0032] One end of the elastic linkage structure passes through the guide support plate to cooperate with the lock plate, and the other end cooperates with the guide support plate to provide elastic potential energy;

[0033] The elastic linkage structure is also linked with the door bolt body to drive the door bolt body to perform a sliding motion opposite to it.

[0034] Therefore, according to the movement of the lock plate, the elastic linkage structure is driven to slide relative to the guide support plate. If the lock plate locks the first lock plate, the elastic linkage structure will move closer to the right plate. On the contrary, the bolt body will move closer to the left plate, thereby locking the second lock plate.

[0035] Furthermore, the elastic linkage structure includes a push rod, a connecting plate, a positioning pin, a third spring, and a washer;

[0036] A washer is coaxially fixed on the outer wall of the push rod, and both ends of the push rod respectively pass through the first guide support plate, and the third spring is sleeved on the push rod and is located between the washer and the first guide support plate;

[0037] The push rod and the door bolt body are both provided with mounting strip holes, the two ends of the connecting plate are respectively inserted into different mounting strip holes and locked with a rotating shaft rod, the positioning pin is fixedly installed on the inner wall of the guide support plate, and the end of the positioning pin is hinged with the connecting plate.

[0038] Therefore, when the push rod approaches the right side plate along with the lock plate, the push rod is also kept at a position close to the right side plate under the elastic force of the third spring. As the push rod moves, the connecting plate rotates with the push rod around the positioning pin, driving the bolt body to move to a position close to the left side plate and insert into the positioning hole on the second locking plate, thereby realizing the left side locking function.

[0039] Furthermore, the door latch assembly also includes a guide support plate 2 spaced apart from the guide support plate 1.

[0040] Therefore, the guide support plate 2 can guide the bolt body.

[0041] Furthermore, the guide support plate 2 and the guide support plate 1 are connected to the sealing plate by welding.

[0042] Therefore, the guide support plate 2 and the guide support plate 1 can be easily assembled.

[0043] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0044] (1) The interlocking device of the utility model adopts a double-sided locking design, specifically, the right side of the sealing plate is locked through the cooperation of the transmission assembly, the interlocking box, and the first locking plate, and the left side of the sealing plate is locked through the cooperation of the interlocking box, the latch assembly, and the second locking plate. While ensuring the safe operation of the grounding switch, it can effectively limit the opening of the sealing plate, thereby avoiding safety hazards caused by misoperation. Therefore, the utility model can significantly improve the safety performance of the switch cabinet, reduce the accident rate, and provide a strong guarantee for the safe operation of the power system.

[0045] (2) The device realizes precise control of the state of the sealing plate through the interaction of the special-shaped pin, the card wheel, the lock body, the lock plate, the bolt body and other components, making the entire locking and unlocking process reliable and stable, reducing the possibility of operating errors. Through the cooperation of the lock plate and the bolt body, the sealing plate is firmly locked on both sides when it is closed, preventing the risk of accidental opening of the sealing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is an overall schematic diagram of the utility model (the sealing plate is in a closed state, and the eccentric wheel on the transmission shaft is close to the right side plate);

[0047] Figure 2 It is the overall schematic diagram of the interlock box;

[0048] Figure 3 A schematic diagram showing the internal structure of the interlock box (the lock body is close to the right side panel);

[0049] Figure 4 It is the overall schematic diagram of the lock body;

[0050] Figure 5 A schematic diagram showing the internal structure of the interlock box (the lock body is close to the left side panel);

[0051] Figure 6 It is an overall schematic diagram of the utility model (the sealing plate is in a closed state, and the eccentric wheel on the transmission shaft is away from the right side plate);

[0052] Figure 7 is an overall schematic diagram of the door latch assembly;

[0053] Figure 8 A schematic diagram showing the internal structure of the latch assembly (the push rod is close to the right side plate and the latch body is close to the left side plate);

[0054] Fig. 9 for Figure 8 A top view of

[0055] Fig.10 A schematic diagram showing the internal structure of the latch assembly (the push rod is away from the right side plate, and the latch body is away from the left side plate);

[0056] Fig.11 This is a schematic diagram showing that the cover is in an open state.

[0057] Reference numerals: 1, cabinet; 2, transmission assembly; 210, transmission shaft; 220, card wheel; 221, card slot; 230, eccentric wheel; 3, interlock box; 310, box body; 320, lock body; 321, round pin; 3211, pressure column; 322, lock plate; 3221, locking slot; 330, first spring; 340, spring cover; 350, special-shaped pin; 351, limit hole; 360, second spring; 370 , guide column; 4, sealing plate; 5, first locking plate; 51, limiting part; 6, unlocking plate; 61, wedge-shaped pushing part; 7, latch assembly; 710, guide support plate one; 720, guide support plate two; 730, push rod; 740, latch body; 750, positioning pin; 760, connecting plate; 770, third spring; 780, washer; 8, second locking plate; 81, positioning socket; 9, left side plate; 10, right side plate. DETAILED DESCRIPTION

[0058] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation methods of the present invention are not limited thereto.

[0059] A grounding switch interlocking device for a double locking cover plate is used in a switch cabinet to improve the safety and reliability of the grounding switch interlocking device of the switch cabinet.

[0060] It should be noted that the specific structure of the interlocking device needs to be coordinated with the specific structure of the switch cabinet to achieve locking of the switch cabinet door. In this regard, the switch cabinet includes a cabinet body 1, a cover plate 4, and a grounding switch. Figure 1 The cabinet body 1 is provided with a left side plate 9 and a right side plate 10 which are arranged opposite to each other, and the sealing plate 4 is arranged between the left side plate 9 and the right side plate 10.

[0061] The interlocking device adopts a double-sided locking design, which can ensure the safe operation of the earthing switch while effectively restricting the opening of the sealing plate 4, thus avoiding potential safety hazards caused by misoperation.

[0062] The interlocking device specifically includes a transmission component 2, an interlocking box 3, a first locking plate 5, a latch component 7, a second locking plate 8, and an unlocking plate member 6. Through the interaction of these components, precise control of the state of the sealing plate 4 is achieved. Double-sided locking is realized when the earthing switch is in the open state, and double-sided unlocking is realized when the earthing switch is in the closed state, making the entire locking and unlocking process reliable and stable, and reducing the possibility of operation errors.

[0063] Among them, as Figure 1 , the first locking plate 5 is welded to the surface of the sealing plate 4 close to the right side plate 10, and is generally in a U shape. The side away from the sealing plate 4 is bent inward to form a limiting portion 51. When the limiting portion 51 is blocked, it means that the first locking plate 5 is locked, that is, the right side of the sealing plate 4 is locked. The unlocking plate member 6 is installed on the side of the first locking plate 5 away from the sealing plate 4 and is arranged at an interval from the limiting portion 51.

[0064] To achieve the above-mentioned right-side locking, the interlocking box 3 is in transmission connection with the transmission component 2. When the earthing switch is in the open state, it is used to lock the limiting portion 51 to keep the sealing plate 4 in the closed state. When the earthing switch is in the closed state, it is used to unlock the limiting portion 51 so that the sealing plate 4 can be opened.

[0065] Specifically, the interlocking box 3 is integrally installed on the side of the right side plate 10 facing the left side plate 9. As Figure 2 and Figure 3 , the interlocking box 3 specifically includes a box body 310, a lock body 320, a first spring 330, a second spring 360, a special-shaped pin 350, and a guide post 370. The box body 310 and the right side plate 10 are detachably and fixedly connected by setting screws to realize the assembly of the entire interlocking box 3.

[0066] The special-shaped pin 350 is coaxially connected with the guide post 370 and respectively slides through both sides of the box body 310, and the guide post 370 passes through the right side plate 10. The first spring 330 is sleeved between the special-shaped pin 350 and the guide post 370. The special-shaped pin 350 is used to cooperate with the unlocking plate member 6, and the guide post 370 is used to cooperate with the transmission component 2. A limiting hole 351 is opened at the end of the special-shaped pin 350 exposed outside the box body 310. Correspondingly, as Figure 1 , a wedge-shaped pushing portion 61 is formed at the end of the unlocking plate member 6, and the wedge-shaped pushing portion 61 is used to extend into the limiting hole 351.

[0067] As Figure 4The lock body 320 is composed of a round pin 321 and a lock plate 322 welded on the round pin 321. The lock plate 322 passes through the box body 310 along the direction toward the first locking plate 5 and is formed with a locking groove 3221 for cooperating with the limiting portion 51. The round pin 321 passes through the box body 310 along the direction toward the right side plate 10 and is formed with a pressure column 3211 for cooperating with the transmission assembly 2. The second spring 360 is sleeved on the round pin 321 and is abutted by the spring cover plate 340.

[0068] Specifically, the transmission assembly 2 is installed between the cabinet 1 and the right side plate 10. The transmission assembly 2 specifically includes a transmission shaft 210, a clamping wheel 220 and an eccentric wheel 230. The transmission shaft 210 can rotate forward and reverse around its own axis and is connected to the grounding switch drive. Its two ends are respectively connected to the cabinet 1 and the right side plate 10. The clamping wheel 220 is coaxially installed at one end of the transmission shaft 210 close to the right side plate 10. In order to achieve cooperation with the guide column 370, the clamping wheel 220 has two clamping grooves 221 symmetrically provided along its own radial direction for clamping the guide column 370. In order to achieve cooperation with the pressure column 3211, the eccentric wheel 230 is eccentrically installed at one end of the transmission shaft 210 close to the right side plate 10, and is arranged adjacent to the clamping wheel 220 for pushing the pressure column 3211.

[0069] It should be noted that, combined with Figure 1 and Figure 3 When the sealing plate 4 is in the closed state and the grounding switch is in the open state, the eccentric wheel 230 will not push the pressure column 3211, and the clamping groove 221 will not clamp the guide column 370. Figure 5 and Fig.11 When the grounding switch is in the closed state and the sealing plate 4 is in the open state, the eccentric wheel 230 will push the pressure column 3211 and the clamping groove 221 will clamp the guide column 370.

[0070] Therefore, when the right side is locked and unlocked, the transmission assembly 2 is driven by the grounding switch to control the switching action of the interlock box 3 to lock and unlock. Moreover, when the cover plate 4 is in the open state, the unlocking plate 6 will cooperate with the interlock box 3 to suspend the switching action of the transmission assembly 2, and the transmission assembly 2 cannot be transmitted. At this time, the proximity switch opening operation is also blocked. When the cover plate 4 is in the closed state, the unlocking plate 6 will cooperate with the interlock box 3 to unlock the suspension action of the transmission assembly 2, and the transmission assembly 2 can transmit normally, thereby allowing the grounding switch to be operated for opening.

[0071] Among them, Figure 6 The second locking plate 8 is detachably assembled on the side of the left plate 9 facing the right plate 10 by setting screws, and a positioning hole 81 is opened at one end. When the positioning hole 81 is inserted into the external structure, it means that the second locking plate 8 is locked, that is, the left side of the sealing plate 4 is locked.

[0072] To achieve the above-mentioned left-side locking, as Figure 6 , the latch assembly 7 is linked with the interlock box 3, and the left-side locking can be achieved while the right-side locking is performed. As Figure 7 , the latch assembly 7 specifically includes a latch body 740, a first guiding support plate 710, an elastic linkage structure, and a second guiding support plate 720. Through the cooperation among these components, when the sealing plate 4 is in the closed state and the earthing switch is in the open state, the latch body 740 can be inserted into the positioning jack 81 in the direction away from the interlock box 3, and when the earthing switch is in the closed state, the latch body 740 can be withdrawn from the positioning jack 81 in the direction close to the interlock box 3.

[0073] Specifically, as Figure 6 and Figure 7 , both the first guiding support plate 710 and the second guiding support plate 720 are in a U shape as a whole and are welded to the side wall of the sealing plate 4. The second guiding support plate 720 is arranged at an interval from the first guiding support plate 710 and is closer to the second locking plate 8. The latch body 740 and the elastic linkage structure both slide through the first guiding support plate 710, and the elastic linkage structure is also linked with the latch body 740 and is used to drive the latch body 740 to perform a sliding movement opposite to it.

[0074] Combined with Figure 8-10 , the elastic linkage structure includes a push rod 730, a connecting plate 760, a positioning pin 750, a third spring 770, and a washer 780. A washer 780 is coaxially fixed on the outer wall of the push rod 730. The two ends of the push rod 730 respectively pass through the first guiding support plate 710, and one end is used to cooperate with the lock plate 322, that is, when the lock plate 322 approaches or moves away from the right side plate 10, the push rod 730 can approach or move away from the right side plate 10. The other end cooperates with the guiding support plate to provide elastic potential energy. Specifically, the third spring 770 is sleeved on the push rod 730 and is between the washer 780 and the first guiding support plate 710. When the push rod 730 approaches the right side plate 10, the third spring 770 provides elastic force, and when the push rod 730 moves away from the right side plate 10, the third spring 770 is compressed to store elastic potential energy.

[0075] Installation strip holes are formed on both the push rod 730 and the latch body 740. The two ends of the connecting plate 760 are respectively inserted into different installation strip holes and are locked with a rotating shaft rod. The positioning pin 750 is fixedly installed on the inner wall of the first guiding support plate 710, and the end of the positioning pin 750 is hinged to the connecting plate 760. Thus, the connecting plate 760 can perform a rotational movement around the positioning pin 750. When the push rod 730 approaches the right side plate 10, the connecting plate 760 is pulled by the push rod 730 to rotate, which will drive the latch body 740 to approach the left side plate 9. When the push rod 730 moves away from the right side plate 10, it will drive the latch body 740 to move away from the left side plate 9.

[0076] Therefore, when the right side is locked and unlocked, the latch assembly 7 linked with the interlock box 3 will react, and at the same time, the left side plate 9 realizes the left side locking and unlocking function of the cover plate 4.

[0077] In summary, the specific working process of the interlocking device of the utility model is as follows:

[0078] When the cover plate 4 of the switch cabinet is in the closed state, the grounding switch is in the open position. At this time, the transmission component 2 is in a specific state under the drive of the grounding switch, such as Figure 1 , specifically, the eccentric wheel 230 on the clamping wheel 220 faces the right side plate 10. At the same time, under the elastic force of the second spring 360, the lock body 320 maintains a position close to the right side plate 10, so that the lock plate 322 successfully hooks the limiting portion 51 on the first locking plate 5, thereby realizing the right side locking function. Figure 8 The push rod 730 is also kept at a position close to the right side plate 10 under the elastic force of the third spring 770. As the push rod 730 moves, the connecting plate 760 rotates with the push rod 730 around the positioning pin 750. Figure 1 , driving the bolt body 740 to move to a position close to the left side plate 9, and inserting it into the positioning hole 81 on the second locking plate 8, thereby realizing the left side locking function. When the sealing plate 4 is in this closed state, the left side plate 9 and the right side plate 10 on the switch cabinet are in a double-sided locked state and cannot be opened, thereby ensuring the safety of equipment and personnel.

[0079] Since the cover plate 4 of the switch cabinet is in the closed state, Figure 1 The wedge-shaped push portion 61 of the unlocking plate 6 is gradually inserted into the limiting hole 351 of the special-shaped pin 350, so that it is kept at a position away from the right side plate 10, driving the guide column 370 to also move away from the right side plate 10. Since the guide column 370 is disengaged from the clamping groove 221 on the clamping wheel 220, the grounding switch can be operated to close the switch. Closing the grounding switch will drive the transmission shaft 210 to rotate 180° clockwise, as shown in FIG. Figure 6 , so that the eccentric wheel 230 on the transmission shaft 210 rotates to a direction away from the right side plate 10. Under the action of the eccentric wheel 230, the lock body 320 slides in a direction away from the right side plate 10, so that the lock plate 322 disengages from the limiting portion 51 of the first locking plate 5, thereby releasing the right side lock. Fig.10 , the lock plate 322 pushes the push rod 730 to move toward the left side plate 9, and the connecting plate 760 rotates accordingly, driving the latch body 740 to move to a position away from the left side plate 9, and disengages from the positioning socket 81 on the second locking plate 8, thereby releasing the left side lock. At this time, the sealing plate 4 can be safely opened, so that the sealing plate 4 is in an open state, and maintenance personnel are allowed to enter the interval.

[0080] like Fig.11As shown, when the cover plate 4 of the switch cabinet is in the open state, the guide column 370 is kept in a position close to the right side plate 10 under the elastic force of the first spring 330. At this time, the guide column 370 will be inserted into the clamping groove 221 on the clamping wheel 220, thereby locking the transmission shaft 210 and preventing it from rotating. Since the transmission shaft 210 is locked, the opening operation of the grounding switch is also blocked. It is ensured that only when the cover plate 4 is closed, the guide column 370 is separated from the clamping groove 221 of the clamping wheel 220, and the transmission shaft 210 can rotate freely, thereby allowing the grounding switch to be opened. In this way, the safety requirement of allowing the grounding switch to be opened is achieved only when the cover plate 4 is closed.

[0081] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A grounding switch interlocking device for double locking cover plates, the switch cabinet comprising a cabinet body (1), a cover plate (4), and a grounding switch, the cabinet body (1) being provided with a left side plate (9) and a right side plate (10) arranged opposite to each other, the cover plate (4) being arranged between the left side plate (9) and the right side plate (10), characterized in that: The interlocking device comprises a transmission assembly (2), an interlocking box (3), a first locking plate (5), a door latch assembly (7), and a second locking plate (8); A first locking plate (5) is mounted on a surface of the sealing plate (4) close to the right side plate (10), and a limiting portion (51) is formed on a side away from the sealing plate (4); An interlock box (3) is installed on the side of the right side plate (10) facing the left side plate (9), is in driving connection with the transmission assembly (2), and is used to lock the limit portion (51) when the sealing plate (4) is in a closed state, and is used to pause the transmission assembly (2) when the sealing plate (4) is in an open state; The transmission assembly (2) is installed between the cabinet (1) and the right side plate (10), and is driven by the grounding switch to control the switching action of locking and unlocking the interlock box (3); A second locking plate (8) is installed on a side of the left plate (9) facing the right plate (10) and is provided with a positioning hole (81); The latch assembly (7) is linked with the interlock box (3) to form a latch body (740). When the sealing plate (4) is in a closed state and the earthing switch is in an open state, the transmission assembly (2) drives the interlock box (3), and the latch body (740) can be inserted into the positioning hole (81) in a direction away from the interlock box (3). When the earthing switch is in a closed state, the transmission assembly (2) drives the interlock box (3), and the latch body (740) can be removed from the positioning hole (81) in a direction close to the interlock box (3).

2. The grounding switch interlocking device for double locking sealing plate according to claim 1, characterized in that: The interlocking device also includes an unlocking plate (6); The unlocking plate (6) is mounted on a side of the first locking plate (5) away from the sealing plate (4) and is spaced apart from the limiting portion (51). When the sealing plate (4) is in an open state, it is used to cooperate with the interlocking box (3) to pause the switching action of the transmission component (2). When the sealing plate (4) is in a closed state, it is used to cooperate with the interlocking box (3) to unlock the pause action of the transmission component (2).

3. The grounding switch interlocking device for double locking sealing plate according to claim 2, characterized in that: The interlock box (3) comprises a box body (310), a lock body (320), a first spring (330), a second spring (360), a special-shaped pin (350), and a guide column (370); The box body (310) is detachably fixedly connected to the right side plate (10), the special-shaped pin (350) is coaxially connected to the guide column (370) and is respectively slidably arranged on both sides of the box body (310), and the guide column (370) is arranged to pass through the right side plate (10), the first spring (330) is sleeved between the special-shaped pin (350) and the guide column (370), the special-shaped pin (350) is used to cooperate with the unlocking plate (6), and the guide column (370) is used to cooperate with the transmission assembly (2); The lock body (320) is composed of a round pin (321) and a lock plate (322) welded to the round pin (321); the lock plate (322) is arranged to pass through the box body (310) in a direction toward the first lock plate (5) and is formed with a lock groove (3221) for cooperating with the limit portion (51); the round pin (321) is arranged to pass through the box body (310) in a direction toward the right side plate (10) and is formed with a pressure column (3211) for cooperating with the transmission assembly (2); and the second spring (360) is sleeved on the round pin (321).

4. The grounding switch interlocking device for double locking sealing plate according to claim 3, characterized in that: The end of the special-shaped pin (350) exposed outside the box body (310) is provided with a limiting hole (351), and the end of the unlocking plate (6) is formed with a wedge-shaped pushing portion (61), which is used to extend into the limiting hole (351).

5. The grounding switch interlocking device for double locking sealing plate according to claim 4, characterized in that: The transmission assembly (2) comprises a transmission shaft (210), a cardan (220) and an eccentric wheel (230); The transmission shaft (210) can rotate forward and reverse around its own axis, is connected to the grounding switch drive, and has two ends that are respectively connected to the cabinet (1) and the right side plate (10) for rotation; The clamping wheel (220) is coaxially mounted on one end of the transmission shaft (210) close to the right side plate (10), and has two clamping grooves (221) symmetrically arranged along its radial direction for clamping the guide column (370); The eccentric wheel (230) is eccentrically mounted on one end of the transmission shaft (210) close to the right side plate (10), and is disposed adjacent to the clamping wheel (220) for pushing the pressure column (3211).

6. The grounding switch interlocking device for double locking sealing plate according to claim 5, characterized in that: The door latch assembly (7) also includes a guide support plate (710) and an elastic linkage structure; The guide support plate 1 (710) is installed on the side wall of the sealing plate (4), and the door latch body (740) and the elastic linkage structure are slidably arranged on the guide support plate 1 (710); One end of the elastic linkage structure passes through the guide support plate 1 (710) to cooperate with the lock plate (322), and the other end cooperates with the guide support plate to provide elastic potential energy; The elastic linkage structure is also linked with the door latch body (740) to drive the door latch body (740) to perform a sliding motion in the opposite direction.

7. The grounding switch interlocking device for double locking sealing plate according to claim 6, characterized in that: The elastic linkage structure comprises a push rod (730), a connecting plate (760), a positioning pin (750), a third spring (770), and a washer (780); A washer (780) is coaxially fixed on the outer wall of the push rod (730), and both ends of the push rod (730) respectively pass through the guide support plate (710). The third spring (770) is sleeved on the push rod (730) and is located between the washer (780) and the guide support plate (710). The push rod (730) and the door latch body (740) are both provided with mounting holes, and the two ends of the connecting plate (760) are respectively inserted into different mounting holes and locked with a rotating shaft rod. The positioning pin (750) is fixedly installed on the inner wall of the guide support plate (710), and the end of the positioning pin (750) is hinged to the connecting plate (760).

8. The grounding switch interlocking device for double locking sealing plate according to claim 7, characterized in that: The door latch assembly (7) further comprises a guide support plate 2 (720) spaced apart from the guide support plate 1 (710).

9. The grounding switch interlocking device for double locking sealing plate according to claim 8, characterized in that: The second guide support plate (720) and the first guide support plate (710) are connected to the sealing plate (4) by welding.

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