Inflatable cabinet grounding switch mechanical lock interlocking system and use method

Abstract

The invention discloses a mechanical lock interlocking system for a grounding switch of a gas insulated switchgear and a using method, and belongs to the technical field of insulation switchs.The mechanical lock interlocking system for the grounding switch comprises a circuit breaker operating mechanism and a three-station operating mechanism which are installed in a mechanism compartment. The grounding interlocking device is arranged between the low-voltage compartment and the high-voltage compartment in a penetrating manner below the mechanism compartment; wherein the three-station operating mechanism, the circuit breaker operating mechanism and the grounding interlocking device are sequentially distributed from top to bottom, and every two of the three-station operating mechanism, the circuit breaker operating mechanism and the grounding interlocking device are mechanically linked; the circuit breaker operating mechanism and the three-station operating mechanism are respectively connected with the circuit breaker and the three-station isolating switch in the inflatable compartment; a rear lower door plate is installed behind the high-voltage compartment cabinet, and the grounding interlocking device is connected with the rear lower door plate. Operation and maintenance personnel must operate in sequence when wanting to open the rear lower door plate of the high-voltage compartment; by adopting the mechanical interlocking, programmed step operation of an operator can be ensured, the reliability is higher, and the personal safety of the operation and maintenance personnel can be further ensured.

Description

Technical Field

[0001] The invention relates to the technical field of insulating switches, and in particular to a mechanical lock interlocking system for a grounding switch of an inflatable cabinet and a use method thereof. Background Art

[0002] Gas-insulated metal-enclosed switchgear adopts modular design, compact structure and small size, which saves floor space and is more suitable for environments with small spaces. It has a high level of protection and can operate stably in harsh environments such as condensation, dirt, and salt spray. The high-voltage components inside the gas-filled cabinet are enclosed in insulating gas, which reduces the impact of the external environment on the equipment. Therefore, the equipment has high reliability and low maintenance workload, and can meet the power grid's needs for high reliability and frequent operations. Due to the above advantages, gas-filled cabinets can be used for protection, control and monitoring of power distribution systems such as power plants, substations, high-rise buildings, industrial and mining enterprises, and subways. They are particularly suitable for harsh environmental conditions such as high humidity, high altitude, and dirt, and are increasingly widely used in power systems.

[0003] At present, according to the "National Grid Company's Safety Management Regulations for Preventing Electrical Misoperation", the medium-voltage distribution switchgear itself should not only meet the national standard requirements, but also have the five protection functions of "preventing the accidental opening and closing of circuit breakers, preventing the opening and closing of isolating switches with load, preventing the opening and closing of grounding switches with power on, preventing power transmission with grounding switches, and preventing accidental entry into live compartments". For the function of "preventing accidental entry into live compartments", it is required that the high-voltage compartment door can only be opened after the high-voltage compartment is grounded, and it is also required that the grounding switch can only be opened after the high-voltage compartment door is closed. Most of the existing inflatable cabinets only have electrical interlocks, and the interlocking function needs to be powered on to complete. Once a power outage occurs, it cannot be used, and its reliability is not as good as the traditional mechanical interlock. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a mechanical lock interlock system and a method of use of an inflatable cabinet grounding switch. If the operation and maintenance personnel want to open the rear lower door panel of the high-voltage compartment, they must operate in the following order: first operate the circuit breaker operating mechanism to open the switch, then operate the three-position mechanism grounding switch to close the switch, and then operate the circuit breaker operating mechanism to close the switch to put the high-voltage compartment in a grounded state, and then operate the grounding interlock device to release the lock of the rear lower door panel and open the rear lower door panel of the high-voltage compartment; the use of the above-mentioned mechanical interlock can ensure that the operator operates in a programmed step-by-step manner, and its reliability is higher, which can further ensure the personal safety of the operation and maintenance personnel.

[0005] To solve the above technical problems, the technical solution of the present invention is achieved as follows:

[0006] A mechanical lock interlocking system for a grounding switch of an inflatable cabinet, the inflatable cabinet comprising an inflatable part and a non-inflatable part;

[0007] The inflatable part includes an inflatable compartment; a circuit breaker and a three-position isolating switch are installed in the inflatable compartment;

[0008] The non-inflatable part includes a mechanism compartment, a low-pressure compartment and a high-pressure compartment, wherein the low-pressure compartment is distributed above and below the mechanism compartment, and the high-pressure compartment is distributed on the side of the lower low-pressure compartment through a partition; the non-inflatable part also includes a busbar compartment and a pressure relief channel, wherein the busbar compartment and the pressure relief channel are respectively located above and on the side of the inflatable compartment, and a rear upper door panel is hingedly installed at the rear of the cabinet of the pressure relief channel;

[0009] The grounding switch mechanical lock interlock system comprises a circuit breaker operating mechanism and a three-position operating mechanism installed in the mechanism compartment, and a grounding interlock device installed between the low-voltage compartment and the high-voltage compartment below the mechanism compartment; wherein the three-position operating mechanism, the circuit breaker operating mechanism and the grounding interlock device are sequentially distributed from top to bottom and are mechanically linked to each other;

[0010] The circuit breaker operating mechanism and the three-position operating mechanism are respectively connected to the circuit breaker and the three-position disconnector in the gas-filled compartment; a rear lower door panel is hingedly installed at the rear of the high-voltage compartment cabinet, the grounding interlocking device is connected to the rear lower door panel, and a locking hole is opened on the rear lower door panel.

[0011] As a preferred embodiment of the mechanical lock interlocking system of the grounding switch of the inflatable cabinet, the three-position operating mechanism is provided with a cam, which is rotatably mounted on the rotating shaft one, wherein the cam can rotate around the central axis of the rotating shaft one;

[0012] The three-station operating mechanism is also provided with a limit plate, which is rotatably mounted on the rotating shaft, wherein the limit plate can rotate around the central axis of the second rotating shaft;

[0013] The three-station operating mechanism is also provided with a slide plate 1, on which a three-station interlocking plate is fixedly mounted.

[0014] As a preferred implementation of the mechanical lock interlocking system of the grounding switch of the inflatable cabinet, the limit plate is located above the cam and the limit plate is always tangent to the cam.

[0015] As a preferred implementation of the mechanical lock interlocking system of the grounding switch of an inflatable cabinet, the internal interference fit of the cam is provided with a protrusion, and the side surfaces of the protrusion are fixedly mounted to the side surfaces of the cam through connecting blocks; wherein the protrusion is a trident protrusion, and three evenly distributed protrusions are arranged on the trident protrusion.

[0016] As a preferred implementation of the mechanical lock interlocking system of the grounding switch of the inflatable cabinet, the circuit breaker operating mechanism is provided with a main shaft, on which a closing limit plate and an opening limit plate are fixedly mounted;

[0017] The circuit breaker operating mechanism is also provided with a guide plate, on which a circuit breaker interlocking rod is installed, a reset spring is sleeved on the circuit breaker interlocking rod, and a pressure wheel baffle is fixedly installed above the circuit breaker interlocking rod;

[0018] The circuit breaker operating mechanism is also provided with a pressure wheel support plate, on which a pressure wheel rotating shaft is installed, one end of the pressure wheel rotating shaft is fixedly installed with a pressure wheel mounting plate, and the other end of the pressure wheel rotating shaft is fixedly installed with an interlocking shaft plate; both ends of the pressure wheel mounting plate are installed on the pressure wheel, and the locking shaft of the interlocking shaft plate is located in the three-position interlocking plate of the three-position operating mechanism.

[0019] As a preferred implementation scheme of the mechanical lock interlocking system of the grounding switch of an inflatable cabinet, the circuit breaker operating mechanism is also provided with a guide sleeve 1 and a guide sleeve 2, the circuit breaker interlocking shaft is penetrated by the guide sleeve 1 and the guide sleeve 2, the guide sleeve 1 is sleeved with a reset spring 2 on the outside of the guide sleeve 1, and a trip button limit plate is fixedly installed on the circuit breaker interlocking shaft; an interlocking block is fixedly installed on the circuit breaker interlocking shaft, and a limit plate baffle is fixedly installed on the circuit breaker interlocking shaft; the circuit breaker operating mechanism is also provided with a trip button rotating shaft, and a trip pressure plate is fixedly installed on the trip button rotating shaft.

[0020] As a preferred implementation of the mechanical lock interlocking system of the grounding switch of the inflatable cabinet, the grounding interlocking device is provided with a front door support, and a guide block is fixedly installed on the front door support;

[0021] The grounding interlocking device is also provided with a slide plate 2, which can move up and down along the guide block; one end of the slide plate 2 is fixedly mounted on the circuit breaker interlocking shaft through a connecting rod; an operating shaft is installed through the front door support, and a fan-shaped plate is fixedly mounted on the operating shaft; a guide groove is provided at one end of the operating shaft facing the rear of the cabinet, and a locking sleeve and a reset spring 3 are also inserted into the guide groove.

[0022] As a preferred implementation scheme of the mechanical lock interlocking system of the grounding switch of an inflatable cabinet, a rear door support is installed through the operating shaft, and the rear door support is fixedly installed in the high-voltage compartment; a limit groove is provided on the rear door support; a locking tongue is fixedly installed on the locking sleeve, and the two are fixedly connected with screws; two bosses are provided on the locking sleeve.

[0023] A method for using a mechanical lock interlocking system for a grounding switch of an inflatable cabinet, the method is implemented by using the mechanical lock interlocking system for a grounding switch of an inflatable cabinet, and the specific steps are as follows:

[0024] Step 1: When the circuit breaker operating mechanism is in the closed state, the closing limit plate rotates to the position directly below the circuit breaker interlocking rod, so that the circuit breaker interlocking rod cannot move downward, the pressure wheel baffle cannot move downward, and the pressure wheel is pressed against, so that the pressure wheel shaft cannot rotate, so that the interlocking shaft plate cannot move, so that the three-position interlocking plate cannot move horizontally, the slide plate of the three-position operating mechanism cannot move horizontally, and the three-position operating mechanism cannot be operated;

[0025] Step 2: When the circuit breaker operating mechanism is in the open state, the closing limit plate rotates to stagger with the circuit breaker interlocking rod, the circuit breaker interlocking rod can move downward, the pressure wheel baffle can move downward, the pressure wheel shaft can rotate, the interlocking shaft plate can rotate, the three-position interlocking plate can move horizontally, the slide plate of the three-position operating mechanism can move horizontally, and the three-position operating mechanism can be operated;

[0026] Step 3: When the circuit breaker operating mechanism is in the open state, the limit plate baffle is located below the open limit plate, the limit plate baffle cannot move upward, the circuit breaker interlocking shaft cannot move upward, the slide plate fixedly connected to the circuit breaker interlocking shaft through the connecting rod cannot move upward, the operating hole of the operating shaft of the grounding interlocking device cannot be exposed, and the grounding interlocking device cannot limit the rear lower door panel, and the rear lower door panel cannot be opened;

[0027] Step 4: When the three-position operating mechanism is not in the grounding switch closing state, the non-convex surface of the cam of the three-position operating mechanism contacts the limit plate, and one end of the limit plate is located above the interlocking block of the circuit breaker operating mechanism, so that the interlocking block cannot be moved up, the circuit breaker interlocking shaft cannot be moved up, the slide fixed to the circuit breaker interlocking shaft through the connecting rod cannot be moved up, and the operating hole of the operating shaft of the grounding interlocking device cannot be exposed, so the grounding interlocking device cannot limit the rear lower door panel, and the rear lower door panel cannot be opened;

[0028] Step 5: When the three-position operating mechanism is in the grounding switch closing state and the circuit breaker operating mechanism is in the closing state, the boss surface of the cam of the three-position operating mechanism contacts the limit plate, the limit plate is staggered with the interlocking block of the circuit breaker operating mechanism, the interlocking block can be moved up, the limit plate baffle is staggered with the opening limit plate, the limit plate baffle can be moved up, the circuit breaker interlocking shaft can be moved up, the slide fixedly connected to the circuit breaker interlocking shaft through the connecting rod can be moved up, and the operating hole of the operating shaft of the grounding interlocking device can be exposed; the operating shaft rotates, the locking shaft sleeve and the locking tongue of the grounding interlocking device are rotated, and the locking tongue can be disengaged from the locking hole on the rear lower door panel, and the rear lower door panel can be opened;

[0029] Step 6: When the rear lower door panel is in the open state, the locking sleeve of the grounding interlocking device moves downward under the action of the reset spring, and the boss of the locking sleeve is embedded in the limit groove of the rear door support, so that the locking sleeve cannot rotate, and the operating shaft connected to the locking sleeve cannot rotate either. The upper edge of the fan-shaped plate abuts against the bent edge of the slide plate. At this time, the slide plate cannot move downward, and the circuit breaker interlocking rod fixedly connected to the slide plate by the connecting rod is in an upward state, blocking the opening pressure plate. The opening pressure plate cannot rotate, and then the opening button shaft cannot rotate, so that the opening operation cannot be performed;

[0030] Step 7. When the rear lower door panel is closed, the locking sleeve of the grounding interlocking device moves forward under the action of the rear lower door, and the boss of the locking sleeve disengages from the limiting groove of the rear door support. The locking sleeve can rotate, and the operating shaft connected to the locking sleeve can also rotate. The operating shaft rotates to a certain degree, and the lock tongue cannot disengage from the locking hole on the rear lower door panel, thereby realizing the locking of the rear lower door panel. At this time, the limit of the slide plate on the fan-shaped plate is released, and the slide plate can move downward. The circuit breaker interlocking rod fixedly connected to the slide plate through the connecting rod can move downward, and the opening button limiting plate fixedly connected to the circuit breaker interlocking rod moves downward to release the limit of the opening pressure plate. The opening pressure plate can rotate, and the opening button rotating shaft can rotate, so that the opening operation can be performed.

[0031] Step 8. When the rear lower door panel is in the locked state, you can remove the fixing screws behind the locking tongue, then take off the locking tongue, release the limit of the locking tongue on the rear lower door panel, open the rear lower door panel, and realize emergency unlocking.

[0032] After adopting the above technical solution, the beneficial effects of the present invention are:

[0033] 1. If the operation and maintenance personnel want to open the rear lower door of the high-voltage compartment, they must operate in the following order: first operate the circuit breaker operating mechanism to open the switch, then operate the three-position mechanism grounding switch to close the switch, and then operate the circuit breaker operating mechanism to close the switch to put the high-voltage compartment in the grounding state, and then operate the grounding interlock device to release the rear lower door lock and open the rear lower door of the high-voltage compartment; the use of the above-mentioned mechanical interlock can ensure that the operator operates in a programmed step, which is more reliable and can further ensure the personal safety of the operation and maintenance personnel;

[0034] 2. When the high-voltage compartment door is open, the circuit breaker operating mechanism cannot be operated to open, and the three-position mechanism grounding switch cannot be operated to open, so that the high-voltage compartment grounding state cannot be released;

[0035] 3. When the inflatable cabinet is in use, the operation and maintenance personnel must resume power supply after inspection. The operation must be carried out in the following order: first close the rear lower door panel, then operate the grounding interlock device to lock the rear lower door panel, then operate the circuit breaker operating mechanism to open the gate, then operate the three-position mechanism grounding switch to open the gate, then operate the three-position mechanism isolation switch to close the gate, and then operate the circuit breaker operating mechanism to close the gate to resume power supply;

[0036] 4. In case of emergency during the use of the inflatable cabinet, the grounding interlocking device can be operated to urgently unlock and open the lower door panel of the high-voltage compartment. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0038] Figure 1 It is a three-dimensional structural diagram of the entire inflatable cabinet;

[0039] Figure 2 for Figure 1 The three-dimensional structure diagram of the operating mechanism of the middle three-station;

[0040] Figure 3 for Figure 1 A three-dimensional structural diagram of the circuit breaker operating mechanism;

[0041] Figure 4 for Figure 3 The local three-dimensional structure diagram of

[0042] Figure 5 for Figure 1 A three-dimensional structural diagram of the neutral ground interlocking device;

[0043] Figure 6 for Figure 5 The local three-dimensional structure diagram of

[0044] Figure 7 A structural diagram of the positions of the closing limit plate and the opening limit plate when the circuit breaker operating mechanism is in the closing state in step 1;

[0045] Figure 8 It is a structural diagram of the positions of the closing limit plate and the opening limit plate when the circuit breaker operating mechanism is in the opening state in step 2;

[0046] Fig. 9 A structural diagram of the position of the limit plate when the three-station operating mechanism is not in the grounding switch closing state in step 4;

[0047] Fig.10 A structural diagram of the position of the limit plate when the three-station operating mechanism is in the grounding switch closing state in step 5;

[0048] Fig.11 for Fig. 9 or Fig.10 Specific cam structure diagram;

[0049] Fig.12 It is a structural diagram of the locking hole when it is closed;

[0050] Fig.13 It is a structural diagram of the locking hole when it is opened;

[0051] Fig.14 It is a structural diagram of the locking sleeve of the grounding interlocking device in step 6 after it moves under the action of the return spring;

[0052] Fig.15 This is a structural diagram of the position of the sector plate when the main shaft cannot rotate in step 6;

[0053] Fig.16 This is a structural diagram of the position of the sector plate after the main shaft is rotated 90 degrees in step 7;

[0054] Fig.17 This is a structural diagram of the position of the opening button limit plate when the circuit breaker interlocking rod is in the upward state in step six.

[0055] Markings in the figure: 1-three-position operating mechanism, 101-cam, 102-rotating shaft 1, 103-limiting plate, 104-rotating shaft 2, 105-slide plate 1, 106-three-position interlocking plate, 107-protrusion, 108-connecting block; 2-circuit breaker operating mechanism, 201-main shaft, 202-closing limit plate, 203-opening limit plate, 204-guide plate, 205-circuit breaker interlocking rod, 206-reset spring 1, 207-pressure wheel baffle, 208-pressure wheel support plate, 209-pressure wheel rotating shaft, 210-pressure wheel mounting plate, 211-interlocking shaft plate, 212-pressure wheel, 213-guide sleeve 1, 214-guide sleeve 2, 215-circuit breaker interlocking shaft, 216-reset spring 2, 217- Disconnect button limit plate, 218-interlocking block, 219-limit plate baffle, 220-disconnect button shaft, 221-disconnect pressure plate; 3-mechanism compartment; 4-grounding interlocking device, 401-front door support, 402-guide block, 403-slide plate 2, 404-connecting rod, 405-operating shaft, 406-fan plate, 407-guide groove, 408-locking sleeve, 409-reset spring 3, 410-rear door support, 411-limiting groove, 412-locking lock tongue, 413-screw, 414-boss; 5-low-pressure compartment; 6-partition; 7-busbar compartment; 8-inflatable compartment; 9-pressure relief channel; 10-rear upper door plate; 11-rear lower door plate, 1101-locking hole; 12-high-pressure compartment. DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiment is only one main embodiment of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] like Figure 1, Figure 13 to Figure 14 As shown, a mechanical lock interlock system of an inflatable cabinet grounding switch, the inflatable cabinet includes an inflatable part and a non-inflatable part; the inflatable part includes an inflatable compartment 8; a circuit breaker and a three-position disconnector are installed in the inflatable compartment 8; the non-inflatable part includes a mechanism compartment 3, a low-voltage compartment 5 and a high-voltage compartment 12, wherein the low-voltage compartment 5 is distributed above and below the mechanism compartment 3, and the high-voltage compartment 12 is distributed on the side of the lower low-voltage compartment 5 through a partition 6; the non-inflatable part also includes a busbar compartment 7 and a pressure relief channel 9, wherein the busbar compartment 7 and the pressure relief channel 9 are respectively located above and on the side of the inflatable compartment 8, and a rear upper door panel 10 is hingedly installed at the rear of the cabinet of the pressure relief channel 9; the grounding switch mechanical lock interlock system includes an inflatable part and a non-inflatable compartment 8 ... the inflatable compartment 8 includes an inflatable The mechanical lock interlocking system includes a circuit breaker operating mechanism 2 and a three-position operating mechanism 1 installed in the mechanism compartment 3, and a grounding interlocking device 4 installed between the low-voltage compartment 5 and the high-voltage compartment 12 below the mechanism compartment 3; wherein the three-position operating mechanism 1, the circuit breaker operating mechanism 2 and the grounding interlocking device 4 are distributed in sequence from top to bottom and are mechanically linked with each other; the circuit breaker operating mechanism 2 and the three-position operating mechanism 1 are respectively connected to the circuit breaker and the three-position disconnector in the inflatable compartment 8; a rear lower door panel 11 is hingedly installed at the rear of the high-voltage compartment 12 cabinet, the grounding interlocking device 4 is connected to the rear lower door panel 11, and a locking hole 1101 is opened on the rear lower door panel 11.

[0058] like Figure 2 As shown, the three-station operating mechanism 1 is provided with a cam 101, which is rotatably mounted on a rotating shaft 102, wherein the cam 101 can rotate around the central axis of the rotating shaft 102; the three-station operating mechanism 1 is also provided with a limit plate 103, which is rotatably mounted on the rotating shaft, wherein the limit plate 103 can rotate around the central axis of the rotating shaft 2 104; the three-station operating mechanism 1 is also provided with a slide plate 105, on which a three-station interlocking plate 106 is fixedly mounted. The limit plate 103 is located above the cam 101 and the limit plate 103 is always tangent to the cam 101.

[0059] like Fig.11 As shown, the cam 101 is internally interference-fitted with a protrusion 107, and the sides of the protrusion 107 are fixedly mounted to the sides of the cam 101 through connecting blocks 108; wherein, the protrusion 107 is a trident protrusion, and three evenly distributed protrusions are arranged on the trident protrusion; when one of the protrusions is worn, the remaining protrusions can be replaced to the upper side without replacing the entire cam 101.

[0060] like Figure 3 to Figure 4As shown, the circuit breaker operating mechanism 2 is provided with a main shaft 201, on which a closing limit plate 202 and an opening limit plate 203 are fixedly installed; the circuit breaker operating mechanism 2 is also provided with a guide plate 204, on which a circuit breaker interlocking rod 205 is installed, on which a reset spring 206 is sleeved, and a pressure wheel baffle 207 is fixedly installed above the circuit breaker interlocking rod 205; the circuit breaker operating mechanism 2 A pressure wheel 212 support plate 208 is also provided, and a pressure wheel 212 rotating shaft 209 is installed through the pressure wheel 212 support plate 208, a pressure wheel mounting plate 210 is fixedly installed on one end of the pressure wheel rotating shaft 209, and an interlocking shaft plate 211 is fixedly installed on the other end of the pressure wheel rotating shaft 209; both ends of the pressure wheel mounting plate 210 are installed through the pressure wheel 212, and the locking shaft of the interlocking shaft plate 211 is located in the three-station interlocking plate 106 of the three-station operating mechanism 1.

[0061] like Figures 5 and 6 As shown, the circuit breaker operating mechanism 2 is further provided with a guide sleeve 1 213 and a guide sleeve 214, a circuit breaker interlocking shaft 215 is installed through the guide sleeve 1 213 and the guide sleeve 214, a reset spring 216 is sleeved on the outside of the guide sleeve 1 213, a circuit breaker interlocking shaft 215 is fixedly installed with a trip button limit plate 217; an interlocking block 218 is fixedly installed on the circuit breaker interlocking shaft 215, and a limit plate 103 baffle is fixedly installed on the circuit breaker interlocking shaft 215; the circuit breaker operating mechanism 2 is also provided with a trip button rotating shaft 220, and a trip pressure plate 221 is fixedly installed on the trip button rotating shaft 220. The grounding interlocking device 4 is provided with a front door support 401, on which a guide block 402 is fixedly installed; the grounding interlocking device 4 is also provided with a slide plate 403, which can move up and down along the guide block 402; one end of the slide plate 403 is fixedly installed on the circuit breaker interlocking shaft 215 through a connecting rod 404; an operating shaft 405 is installed through the front door support 401, on which a fan-shaped plate 406 is fixedly installed; a guide groove 407 is provided at one end of the operating shaft 405 facing the rear of the cabinet, and a locking sleeve 408 and a reset spring 409 are simultaneously inserted into the guide groove 407. The operating shaft 405 is penetrated by a rear door support 410, which is fixedly installed in the high-voltage compartment 12; a limiting groove 411 is provided on the rear door support 410; a locking tongue 412 is fixedly installed on the locking sleeve 408, and the two are fixedly connected by screws 413; two bosses 414 are provided on the locking sleeve 408.

[0062] A method for using a mechanical lock interlocking system for a grounding switch of an inflatable cabinet, the method is implemented by using the mechanical lock interlocking system for a grounding switch of an inflatable cabinet, and the specific steps are as follows:

[0063] Step 1: When the circuit breaker operating mechanism 2 is in the closed state, the closing limit plate 202 of the circuit breaker operating mechanism 2 is in Figure 7In the position shown, the closing limit plate 202 rotates to just below the circuit breaker interlock rod 205, so that the circuit breaker interlock rod 205 cannot move downward, the pressure wheel baffle 207 cannot move downward, and presses against the pressure wheel 212, so that the pressure wheel shaft 209 cannot rotate, so that the interlock shaft plate 211 cannot move, so that the three-station interlock plate 106 cannot move horizontally, the slide of the three-station operating mechanism 1 cannot move horizontally, and the three-station operating mechanism 1 cannot be operated.

[0064] Step 2: When the circuit breaker operating mechanism 2 is in the open state, the closing limit plate 202 of the circuit breaker operating mechanism 2 is in the closed state. Figure 8 In the position shown, the closing limit plate 202 rotates and is staggered with the circuit breaker interlocking rod 205, the circuit breaker interlocking rod 205 can move downward, the pressure wheel baffle 207 can move downward, the pressure wheel shaft 209 can rotate, the interlocking shaft plate 211 can rotate, the three-station interlocking plate 106 can move horizontally, the slide plate of the three-station operating mechanism 1 can move horizontally, and the three-station operating mechanism 1 can be operated.

[0065] Step 3: When the circuit breaker operating mechanism 2 is in the open state, the open limit plate 203 of the circuit breaker operating mechanism 2 is in Figure 8 In the position shown, the baffle of the limit plate 103 is located below the opening limit plate 203, the baffle of the limit plate 103 cannot move upward, the circuit breaker interlock shaft 215 cannot move upward, the slide plate fixed to the circuit breaker interlock shaft 215 by the connecting rod 404 cannot move upward, the operating hole of the operating shaft 405 of the grounding interlock device 4 cannot be exposed, and thus the grounding interlock device 4 cannot limit the rear lower door panel 11, and the rear lower door panel 11 cannot be opened.

[0066] Step 4: When the three-position operating mechanism 1 is not in the grounding switch closed state, the non-convex surface of the cam 101 of the three-position operating mechanism 1 is in contact with the limit plate 103, and the position of the limit plate 103 is as follows: Fig. 9 As shown, one end of the limit plate 103 is located above the interlocking block 218 of the circuit breaker operating mechanism 2, so that the interlocking block 218 cannot be moved up, the circuit breaker interlocking shaft 215 cannot be moved up, the slide plate fixed to the circuit breaker interlocking shaft 215 through the connecting rod 404 cannot be moved up, and the operating hole of the operating shaft 405 of the grounding interlocking device 4 cannot be exposed, thereby making it impossible to limit the rear lower door panel 11 by the grounding interlocking device 4, and the rear lower door panel 11 cannot be opened.

[0067] Step 5: When the three-position operating mechanism 1 is in the grounding switch closing state and the circuit breaker operating mechanism 2 is in the closing state, the boss surface of the cam 101 of the three-position operating mechanism 1 contacts the limit plate 103, and the position of the limit plate 103 is as follows: Fig.10 As shown, the limit plate 103 is staggered with the interlocking block 218 of the circuit breaker operating mechanism 2, and the interlocking block 218 can move upward. At the same time, the opening limit plate 203 of the circuit breaker operating mechanism 2 is in Figure 7In the position shown, the baffle of the limit plate 103 is staggered with the opening limit plate 203, the baffle of the limit plate 103 can move up, the circuit breaker interlocking shaft 215 can move up, the slide plate fixedly connected to the circuit breaker interlocking shaft 215 through the connecting rod 404 can move up, and the operating hole of the operating shaft 405 of the grounding interlocking device 4 can be exposed. The operating shaft 405 rotates, and the locking sleeve 408 and the locking tongue 412 of the grounding interlocking device 4 rotate to Fig.13 In the state shown, the locking bolt 412 can escape from the locking hole 1101 on the rear lower door panel 11, and the rear lower door panel 11 can be opened.

[0068] Step 6: When the rear lower door panel 11 is in the open state, the locking sleeve 408 of the grounding interlocking device 4 moves to Fig.14 In the position shown, the boss 414 of the locking sleeve 408 is embedded in the limiting groove 411 of the rear door support 410, so that the locking sleeve 408 cannot rotate, and the operating shaft 405 connected to the locking sleeve 408 cannot rotate either. At this time, the fan-shaped plate 406 fixed to the operating shaft 405 is in Fig.15 In the position shown, the upper edge of the sector plate 406 abuts against the bent edge of the slide plate. At this time, the slide plate cannot move downward, and the circuit breaker interlocking rod 205 fixedly connected to the slide plate through the connecting rod 404 is in an upward moving state. At this time, the opening button limit plate 217 fixedly connected to the circuit breaker interlocking rod 205 is in a Fig.17 In the position shown, the opening pressure plate 221 is blocked, and the opening pressure plate 221 cannot rotate, and then the opening button shaft 220 cannot rotate, so that the opening operation cannot be performed.

[0069] Step 7: When the rear lower door panel 11 is closed, Fig.14 As shown, the locking sleeve 408 of the grounding interlocking device 4 moves forward under the action of the rear lower door, and the boss 414 of the locking sleeve 408 is disengaged from the limiting groove 411 of the rear door support 410. The locking sleeve 408 can rotate, and the operating shaft 405 connected to the locking sleeve 408 can also rotate. The rotating operating shaft 405 rotates 90 degrees. At this time, the position of the locking sleeve 408 is as shown in FIG. Fig.12 As shown, the position of the sector plate 406 is as follows Fig.16 As shown, the lock tongue cannot escape from the locking hole 1101 on the rear lower door panel 11, and the rear lower door panel 11 is locked. At this time, the sector plate 406 releases the limit of the slide plate, the slide plate can move downward, the circuit breaker interlocking rod 205 fixedly connected to the slide plate through the connecting rod 404 can move downward, and the opening button limit plate 217 fixedly connected to the circuit breaker interlocking rod 205 moves downward to release the limit of the opening pressure plate 221, the opening pressure plate 221 can rotate, and the opening button rotating shaft 220 can rotate, so that the opening operation can be performed.

[0070] Step 8: When the rear lower door panel 11 is in the locked state, it can be removed Fig.12The fixing screw 413 behind the locking tongue 412 is removed, and then the locking tongue 412 is removed to release the limiting effect of the locking tongue 412 on the rear lower door panel 11, and the rear lower door panel 11 is opened to realize emergency unlocking.

[0071] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mechanical lock interlocking system for a grounding switch of an inflatable cabinet, the inflatable cabinet comprising an inflatable part and a non-inflatable part; The inflatable part includes an inflatable compartment; a circuit breaker and a three-position isolating switch are installed in the inflatable compartment; The non-inflatable part includes a mechanism compartment, a low-pressure compartment and a high-pressure compartment, wherein the low-pressure compartment is distributed above and below the mechanism compartment, and the high-pressure compartment is distributed on the side of the lower low-pressure compartment through a partition; the non-inflatable part also includes a busbar compartment and a pressure relief channel, wherein the busbar compartment and the pressure relief channel are respectively located above and on the side of the inflatable compartment, and a rear upper door panel is installed at the rear of the cabinet of the pressure relief channel; Features: The grounding switch mechanical lock interlock system comprises a circuit breaker operating mechanism and a three-position operating mechanism installed in the mechanism compartment, and a grounding interlock device installed between the low-voltage compartment and the high-voltage compartment below the mechanism compartment; wherein the three-position operating mechanism, the circuit breaker operating mechanism and the grounding interlock device are sequentially distributed from top to bottom and are mechanically linked to each other; The circuit breaker operating mechanism and the three-position operating mechanism are respectively connected to the circuit breaker and the three-position disconnector in the gas-filled compartment; a rear lower door panel is installed behind the high-voltage compartment cabinet, the grounding interlock device is connected to the rear lower door panel, and a locking hole is opened on the rear lower door panel.

2. The inflatable cabinet grounding switch mechanical lock interlocking system according to claim 1 is characterized in that: The three-station operating mechanism is provided with a cam, which is rotatably mounted on the first rotating shaft, wherein the cam can rotate around the central axis of the first rotating shaft; The three-station operating mechanism is also provided with a limit plate, which is rotatably mounted on the rotating shaft, wherein the limit plate can rotate around the central axis of the second rotating shaft; The three-station operating mechanism is also provided with a slide plate 1, on which a three-station interlocking plate is fixedly mounted.

3. The inflatable cabinet grounding switch mechanical lock interlocking system according to claim 2 is characterized in that: The limiting plate is located above the cam and is always tangent to the cam.

4. The inflatable cabinet grounding switch mechanical lock interlocking system according to claim 3 is characterized in that: The cam is internally interference-fitted with a protrusion, and the side surfaces of the protrusion are fixedly mounted on the side surfaces of the cam through connecting blocks.

5. The inflatable cabinet grounding switch mechanical lock interlocking system according to claim 4 is characterized in that: The protrusion is a trident protrusion, and three evenly distributed protrusions are arranged on the trident protrusion.

6. The inflatable cabinet grounding switch mechanical lock interlocking system according to claim 5 is characterized in that: The circuit breaker operating mechanism is provided with a main shaft, on which a closing limit plate and an opening limit plate are fixedly mounted; The circuit breaker operating mechanism is also provided with a guide plate, on which a circuit breaker interlocking rod is installed, a reset spring is sleeved on the circuit breaker interlocking rod, and a pressure wheel baffle is fixedly installed above the circuit breaker interlocking rod; The circuit breaker operating mechanism is also provided with a pressure wheel support plate, a pressure wheel rotating shaft is installed through the pressure wheel support plate, a pressure wheel rotating shaft is fixedly installed with a pressure wheel mounting plate at one end of the pressure wheel rotating shaft, and an interlocking shaft plate is fixedly installed at the other end of the pressure wheel rotating shaft; both ends of the pressure wheel mounting plate are installed through the pressure wheel, and the locking shaft of the interlocking shaft plate is located in the three-position interlocking plate of the three-position operating mechanism.

7. The inflatable cabinet grounding switch mechanical lock interlocking system according to claim 6 is characterized in that: The circuit breaker operating mechanism is also provided with a guide sleeve 1 and a guide sleeve 2, wherein the circuit breaker interlocking shaft is penetrated and installed in the guide sleeve 1 and the guide sleeve 2, and the guide sleeve 1 is externally sleeved with a reset spring 2, and a trip button limit plate is fixedly installed on the circuit breaker interlocking shaft; an interlocking block is fixedly installed on the circuit breaker interlocking shaft, and a limit plate baffle is fixedly installed on the circuit breaker interlocking shaft; the circuit breaker operating mechanism is also provided with a trip button rotating shaft, and a trip pressure plate is fixedly installed on the trip button rotating shaft.

8. The inflatable cabinet grounding switch mechanical lock interlocking system according to claim 7 is characterized in that: The grounding interlocking device is provided with a front door support, and a guide block is fixedly mounted on the front door support; The grounding interlocking device is also provided with a slide plate 2, which can move up and down along the guide block; one end of the slide plate 2 is fixedly mounted on the circuit breaker interlocking shaft through a connecting rod; an operating shaft is installed through the front door support, and a fan-shaped plate is fixedly mounted on the operating shaft; a guide groove is provided at one end of the operating shaft facing the rear of the cabinet, and a locking sleeve and a reset spring 3 are simultaneously inserted into the guide groove.

9. The inflatable cabinet grounding switch mechanical lock interlocking system according to claim 8, characterized in that: The operating shaft is penetrated by a rear door support, which is fixedly installed in the high-pressure compartment; a limiting groove is provided on the rear door support; a locking tongue is fixedly installed on the locking sleeve, and the two are fixedly connected by screws; two bosses are provided on the locking sleeve.

10. A method for using a mechanical lock interlocking system of an inflatable cabinet grounding switch, characterized in that: The method is implemented by using the inflatable cabinet grounding switch mechanical lock interlocking system according to claim 9, and the specific steps are as follows: Step 1: When the circuit breaker operating mechanism is in the closed state, the closing limit plate rotates to the position directly below the circuit breaker interlocking rod, so that the circuit breaker interlocking rod cannot move downward, the pressure wheel baffle cannot move downward, and the pressure wheel is pressed against, so that the pressure wheel shaft cannot rotate, so that the interlocking shaft plate cannot move, so that the three-position interlocking plate cannot move horizontally, the slide plate of the three-position operating mechanism cannot move horizontally, and the three-position operating mechanism cannot be operated; Step 2: When the circuit breaker operating mechanism is in the open state, the closing limit plate rotates to stagger with the circuit breaker interlocking rod, the circuit breaker interlocking rod can move downward, the pressure wheel baffle can move downward, the pressure wheel shaft can rotate, the interlocking shaft plate can rotate, the three-position interlocking plate can move horizontally, the slide plate of the three-position operating mechanism can move horizontally, and the three-position operating mechanism can be operated; Step 3: When the circuit breaker operating mechanism is in the open state, the limit plate baffle is located below the open limit plate, the limit plate baffle cannot move upward, the circuit breaker interlocking shaft cannot move upward, the slide plate fixedly connected to the circuit breaker interlocking shaft through the connecting rod cannot move upward, the operating hole of the operating shaft of the grounding interlocking device cannot be exposed, and the grounding interlocking device cannot limit the rear lower door panel, and the rear lower door panel cannot be opened; Step 4: When the three-position operating mechanism is not in the grounding switch closing state, the non-convex surface of the cam of the three-position operating mechanism contacts the limit plate, and one end of the limit plate is located above the interlocking block of the circuit breaker operating mechanism, so that the interlocking block cannot be moved up, the circuit breaker interlocking shaft cannot be moved up, the slide fixed to the circuit breaker interlocking shaft through the connecting rod cannot be moved up, and the operating hole of the operating shaft of the grounding interlocking device cannot be exposed, so the grounding interlocking device cannot limit the rear lower door panel, and the rear lower door panel cannot be opened; Step 5: When the three-position operating mechanism is in the grounding switch closing state and the circuit breaker operating mechanism is in the closing state, the boss surface of the cam of the three-position operating mechanism contacts the limit plate, the limit plate is staggered with the interlocking block of the circuit breaker operating mechanism, the interlocking block can be moved up, the limit plate baffle is staggered with the opening limit plate, the limit plate baffle can be moved up, the circuit breaker interlocking shaft can be moved up, the slide fixedly connected to the circuit breaker interlocking shaft through the connecting rod can be moved up, and the operating hole of the operating shaft of the grounding interlocking device can be exposed; the operating shaft rotates, the locking shaft sleeve and the locking tongue of the grounding interlocking device are rotated, and the locking tongue can be disengaged from the locking hole on the rear lower door panel, and the rear lower door panel can be opened; Step 6: When the rear lower door panel is in the open state, the locking sleeve of the grounding interlocking device moves downward under the action of the reset spring, and the boss of the locking sleeve is embedded in the limit groove of the rear door support, so that the locking sleeve cannot rotate, and the operating shaft connected to the locking sleeve cannot rotate either. The upper edge of the fan-shaped plate abuts against the bent edge of the slide plate. At this time, the slide plate cannot move downward, and the circuit breaker interlocking rod fixedly connected to the slide plate by the connecting rod is in an upward state, blocking the opening pressure plate. The opening pressure plate cannot rotate, and then the opening button shaft cannot rotate, so that the opening operation cannot be performed; Step 7. When the rear lower door panel is closed, the locking sleeve of the grounding interlocking device moves forward under the action of the rear lower door, and the boss of the locking sleeve disengages from the limiting groove of the rear door support. The locking sleeve can rotate, and the operating shaft connected to the locking sleeve can also rotate. The operating shaft rotates to a certain degree, and the lock tongue cannot disengage from the locking hole on the rear lower door panel, thereby realizing the locking of the rear lower door panel. At this time, the limit of the slide plate on the fan-shaped plate is released, and the slide plate can move downward. The circuit breaker interlocking rod fixedly connected to the slide plate through the connecting rod can move downward, and the opening button limiting plate fixedly connected to the circuit breaker interlocking rod moves downward to release the limit of the opening pressure plate. The opening pressure plate can rotate, and the opening button rotating shaft can rotate, so that the opening operation can be performed. Step 8. When the rear lower door panel is in the locked state, you can remove the fixing screws behind the locking tongue, then take off the locking tongue, release the limit of the locking tongue on the rear lower door panel, open the rear lower door panel, and realize emergency unlocking.

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