Cabinet gas insulated switchgear lifting type mechanical interlocking system and use method

Abstract

The invention discloses a lifting type mechanical interlocking system of a gas insulated switchgear and a using method, and belongs to the technical field of insulated switchs.The lifting type mechanical interlocking system comprises a three-station interlocking mechanism and a circuit breaker interlocking mechanism which are installed in a mechanism compartment, and a chamber door interlocking mechanism installed in a cable compartment; wherein the three-station interlocking mechanism, the circuit breaker interlocking mechanism and the chamber door interlocking mechanism are sequentially distributed from top to bottom and are mechanically linked in pairs; the three-station interlocking mechanism and the circuit breaker interlocking mechanism are respectively connected with a three-station isolating switch and a circuit breaker in the inflation compartment; a cable chamber door is installed behind the cable compartment cabinet, and the chamber door interlocking mechanism is connected with the cable chamber door. Through the design of the three-position isolating switch, the circuit breaker switch and the high-voltage cable chamber door interlocking mechanism, the occurrence of manual misoperation is avoided, the phenomenon that a high-voltage electrified interval is mistakenly entered in the maintenance process is avoided, and the defects of the existing interlocking of the existing gas insulated switchgear are made up.

Description

Technical Field

[0001] The invention relates to the technical field of insulating switches, and in particular to an inflatable cabinet lifting type mechanical interlocking system 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 circuit breaker from being opened or closed by mistake, preventing the disconnector from opening or closing with load, preventing the earthing switch from opening or closing with power on, preventing power transmission with the earthing switch, and preventing entering the live compartment by mistake". For the function of "preventing entering the live compartment by mistake", 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 earthing switch can only be opened after the high-voltage compartment door is closed. The existing inflatable cabinet products lack the mechanical interlock between the three-position disconnector, the circuit breaker switch and the cable room door. Due to the lack of interlock protection of the three, on-site maintenance and construction personnel can operate at will, causing the cable room to be energized, which is easy to endanger personal safety. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a pull-type mechanical interlocking system for an inflatable cabinet and a method of use. Through the design of a three-position isolating switch, a circuit breaker switch and a high-voltage cable room door interlocking mechanism, human error in operation is avoided, and entering the high-voltage live interval by mistake during maintenance is avoided, thus making up for the shortcomings of the existing interlocking of the inflatable cabinet.

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

[0006] An inflatable cabinet lifting type mechanical interlocking system, the inflatable cabinet comprises an inflatable part and a non-inflatable part;

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

[0008] The non-inflatable part includes a mechanism compartment and a cable compartment, wherein the cable compartment is distributed below the mechanism compartment; the non-inflatable part also includes an instrument compartment, a busbar compartment and a pressure relief channel, wherein the instrument compartment is located above the mechanism compartment, wherein the busbar compartment and the pressure relief channel are located above and beside the inflatable compartment respectively;

[0009] The lifting type mechanical interlocking system comprises a three-position interlocking mechanism and a circuit breaker interlocking mechanism installed in the mechanism compartment, and a room door interlocking mechanism installed in the cable compartment; wherein the three-position interlocking mechanism, the circuit breaker interlocking mechanism and the room door interlocking mechanism are sequentially arranged from top to bottom and are mechanically linked to each other;

[0010] The three-position interlocking mechanism and the circuit breaker interlocking mechanism are respectively connected to the three-position isolating switch and the circuit breaker in the gas-filled compartment; a cable compartment door is hingedly installed at the rear of the cable compartment cabinet, and the door interlocking mechanism is connected to the cable compartment door.

[0011] As a preferred embodiment of the inflatable cabinet lifting type mechanical interlocking system, the door interlocking mechanism includes an L-shaped interlocking plate 1, a wire rope fixing joint, an electromagnetic lock baffle, an electromagnetic lock, a door interlocking rod, a C-shaped interlocking plate, an I-shaped interlocking plate 1, an L-shaped interlocking plate 2, a reverse interlocking plate and an I-shaped interlocking plate 2;

[0012] The L-shaped interlocking plate 1 is fixed to the crossbeam of the cable room through a steel wire rope fixing joint. The L-shaped interlocking plate 1 is provided with a mounting hole and is connected to the electromagnetic lock baffle through the mounting hole; the C-shaped interlocking plate is provided with a locking rod guide hole and is fixedly installed on the cable room door; the I-shaped interlocking plate 1 is installed on the L-shaped interlocking plate 2. The L-shaped interlocking plate 2 is provided with a rivet nut hole and is installed on the cable room door through the rivet nut hole; the reverse interlocking plate is connected to the middle plate of the L-shaped interlocking plate 1 through a hexagon socket bolt with a lock nut, one end of the reverse interlocking plate is welded and fixed to the I-shaped interlocking plate 2, and the other end of the reverse interlocking plate is inserted into the guide groove of the side panel of the L-shaped interlocking plate 1.

[0013] As a preferred implementation of an inflatable cabinet lifting type mechanical interlocking system, the wire rope fixing joint is fixed to the cross beam of the cable room and also fixes the wire rope sheath.

[0014] As a preferred implementation of a lifting-type mechanical interlocking system for an inflatable cabinet, the door interlocking rod is composed of a locking rod and a round tube head.

[0015] As a preferred embodiment of the lifting mechanical interlocking system of an inflatable cabinet, an oblong hole is provided on the I-shaped interlocking plate for adjusting the front-to-back distance, and the diameter of the oblong hole is 3-5 mm.

[0016] As a preferred implementation of the inflatable cabinet lifting type mechanical interlocking system, the anti-loosening nut includes a hexagonal nut and a hexagonal anti-loosening sleeve; six evenly distributed limit heads are fixed on the inner side of the hexagonal anti-loosening sleeve, and a limit groove used in conjunction with the limit head is opened on the side of the hexagonal nut;

[0017] The hexagonal nut is assembled on the hexagonal bolt through threads and abuts against the countersunk hole of the interlocking plate to be fixed. The outer wall of the hexagonal anti-loosening sleeve is interference-fitted with the inner wall of the countersunk hole through anti-slip grooves, thereby locking the anti-loosening nut.

[0018] As a preferred implementation of an inflatable cabinet lifting-type mechanical interlocking system, a three-position interlocking mechanism is provided with an interlocking block 1 installed on a transmission shaft of a three-position isolating switch, and an interlocking block 2 is fixedly installed on the interlocking block 1.

[0019] As a preferred implementation of an inflatable cabinet lifting type mechanical interlocking system, the circuit breaker interlocking mechanism includes a circuit breaker interlocking part and a circuit breaker reverse interlocking part;

[0020] The circuit breaker interlocking part is provided with a circuit breaker interlocking rod and a circuit breaker crank arm. A circular wire pressing plate for fixing a steel wire rope is welded at the lower end of the circuit breaker interlocking rod and is connected to the circuit breaker crank arm by threads.

[0021] The reverse interlocking part of the circuit breaker is provided with an I-shaped interlocking plate three, an I-shaped interlocking plate four and a Z-shaped interlocking plate; the I-shaped interlocking plate three is fixed to the circuit breaker mechanism by bolts and is used for guiding and fixing the spring of the I-shaped interlocking plate four; one end of the Z-shaped interlocking plate is fixed to the bottom plate of the mechanism compartment, and the other end of the Z-shaped interlocking plate is provided with a guide groove for guiding the I-shaped interlocking plate four when it moves up and down, one end of the I-shaped interlocking plate four is provided with a round hole for connecting the cotter pin fixing spring, and the other end of the I-shaped interlocking plate four is connected to the wire rope.

[0022] As a preferred implementation of an inflatable cabinet lifting mechanical interlocking system, the two door interlocking rods in the door interlocking mechanism are respectively connected to the circuit breaker interlocking rod of the circuit breaker interlocking part and the interlocking block two in the three-position interlocking mechanism through steel wire ropes.

[0023] A method for using the inflatable cabinet lifting type mechanical interlocking system is implemented using the above-mentioned inflatable cabinet lifting type mechanical interlocking system, and its specific operating steps are as follows:

[0024] S1. When the circuit breaker is in the open state and the third position is in the isolation position or isolation closed position, the door interlocking rod is inserted into the oblong hole on the I-shaped interlocking plate to lock with the cable door, and the cable door cannot be opened at this time;

[0025] S2. When the circuit breaker is closed, the circuit breaker arm drives the circuit breaker interlocking rod to move upward, and the circular wire pressing plate on the circuit breaker interlocking rod pulls the wire rope upward. The wire rope drives the left door interlocking rod to move upward. The spring on the left door interlocking rod is in a compressed state. At this time, the circuit breaker and the cable room door are unlocked;

[0026] S3, when the three-station interlocking mechanism is operated from the isolation position to the grounding position, the interlocking block 1 rotates to the right and the interlocking block 2 is provided on it to pull the wire rope, and the wire rope drives the right door interlocking rod to move upward, and the spring on the right door interlocking rod is in a compressed state, at this time, the three-station and cable room door are unlocked;

[0027] S4. When the circuit breaker is open and the three-position switch is not in the grounding position, the door interlocking rod falls under the action of the spring force. At this time, the circuit breaker, the three-position switch and the cable room door are locked, and the cable room door cannot be opened;

[0028] S5. When the cable room door is in the closed state, the cable room door pushes the reverse interlocking plate to rotate downward, and the I-shaped interlocking plate 2 of the reverse interlocking plate pulls the wire rope, and the wire rope drives the I-shaped interlocking plate 4 to move downward. At this time, the interlock between the I-shaped interlocking plate 4 and the circuit breaker opening button is released, and the spring on the I-shaped interlocking plate 4 is in a compressed state, and the circuit breaker can be manually opened;

[0029] S6. When the cable room door is in the open state, the I-shaped interlocking plate 4 moves upward under the action of the spring force to block the circuit breaker opening button, and the circuit breaker cannot be manually opened.

[0030] After adopting the above technical solution, the beneficial effects of the present invention are:

[0031] 1. In order to avoid accidentally entering the high-voltage live compartment during maintenance, when the circuit breaker is in the open state and the three-station is in the isolated position, the cable room door cannot be opened, which can effectively avoid accidentally entering the high-voltage live compartment during maintenance;

[0032] 2. In order to avoid entering the high-voltage live compartment by mistake during maintenance, when the circuit breaker is in the open state and the three-position is in the isolation closed position (that is, the line side is not grounded), the cable room door cannot be opened at this time, which can effectively avoid entering the high-voltage live compartment by mistake during maintenance;

[0033] 3. In order to further improve the safety of the maintenance process, when the cable room door is in the open state, the I-shaped interlocking plate 4 moves upward under the action of the spring force to block the circuit breaker opening button. The circuit breaker cannot be manually opened, which can effectively improve the safety of the maintenance process. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 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.

[0035] Figure 1 This is the main structural diagram of the inflatable cabinet as a whole;

[0036] Figure 2 It is a side view of the overall structure of the inflatable cabinet;

[0037] Figure 3 for Figure 1 The three-dimensional structural diagram of the middle chamber door interlocking mechanism;

[0038] Figure 4 for Figure 1 The three-dimensional structural diagram of the middle three-station interlocking mechanism;

[0039] Figure 5 for Figure 1 A three-dimensional structural diagram of the interlocking part of the circuit breaker interlocking mechanism;

[0040] Figure 6 for Figure 1 A three-dimensional structural diagram of the reverse interlocking part of the circuit breaker interlocking mechanism;

[0041] Figure 7 for Figure 3 A three-dimensional structural diagram of the middle L-shaped interlocking plate 1;

[0042] Figure 8 for Figure 3 Three-dimensional structure of the hexagon socket bolt and the anti-loosening nut during assembly Figure 1 ;

[0043] Fig. 9 for Figure 3 Three-dimensional structure of the hexagon socket bolt and the anti-loosening nut during assembly Figure 2 ;

[0044] Fig.10 for Fig. 9 Exploded diagram.

[0045] Markings in the figure: 1-door interlocking mechanism, 101-L-shaped interlocking plate 1, 102-wire rope fixing joint, 103-electromagnetic lock baffle, 104-electromagnetic lock, 105-door interlocking rod, 106-C-shaped interlocking plate, 107-I-shaped interlocking plate 1, 108-L-shaped interlocking plate 2, 109-reverse interlocking plate, 110-I-shaped interlocking plate 2, 111-hexagon socket bolt, 112-hexagon nut, 113-hexagon anti-loosening sleeve, 114-limiting head, 115-limiting groove , 116-anti-slip groove; 2-three-position interlocking mechanism, 201-interlocking block one, 202-interlocking block two; 3-circuit breaker interlocking part; 301-circuit breaker interlocking rod, 302-circuit breaker crank arm; 4-circuit breaker reverse interlocking part, 401-I-shaped interlocking plate three, 402-I-shaped interlocking plate four, 403-Z-shaped interlocking plate; 5-inflatable compartment; 6-mechanism compartment; 7-cable compartment; 8-instrument compartment; 9-busbar compartment; 10-pressure relief channel; 11-cable room door. DETAILED DESCRIPTION

[0046] 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.

[0047] like Figure 1 to Figure 2 As shown, a lifting type mechanical interlocking system of an inflatable cabinet, the inflatable cabinet includes an inflatable part and a non-inflatable part; the inflatable part includes an inflatable compartment 5; a three-position disconnector and a circuit breaker are installed in the inflatable compartment 5; the non-inflatable part includes a mechanism compartment 6 and a cable compartment 7, wherein the cable compartment 7 is distributed below the mechanism compartment 6; the non-inflatable part also includes an instrument compartment 8, a busbar compartment 9 and a pressure relief channel 10, wherein the instrument compartment 8 is located above the mechanism compartment 6, wherein the busbar compartment 9 and the pressure relief channel 10 are respectively located above and beside the inflatable compartment 5; the lifting type mechanical interlocking system of the inflatable cabinet includes an inflatable part and a non-inflatable compartment 5; The pull-type mechanical interlocking system includes a three-position interlocking mechanism 2 and a circuit breaker interlocking mechanism installed in the mechanism compartment 6, and a door interlocking mechanism 1 installed in the cable compartment 7; wherein the three-position interlocking mechanism 2, the circuit breaker interlocking mechanism and the door interlocking mechanism 1 are distributed in sequence from top to bottom and are mechanically linked with each other; the three-position interlocking mechanism 2 and the circuit breaker interlocking mechanism are respectively connected to the three-position disconnector and the circuit breaker in the inflatable compartment 5; a cable compartment door 11 is hingedly installed at the rear of the cable compartment 7 cabinet, and the door interlocking mechanism 1 is connected to the cable compartment door 11.

[0048] like Figure 3 , Figure 7As shown, the door interlock mechanism 1 includes an L-shaped interlock plate 101, a wire rope fixing joint 102, an electromagnetic lock 104 baffle 103, an electromagnetic lock 104, a door interlock rod 105, a C-shaped interlock plate 106, an I-shaped interlock plate 107, an L-shaped interlock plate 2 108, a reverse interlock plate 109 and an I-shaped interlock plate 2 110; the L-shaped interlock plate 101 is fixed to the crossbeam of the cable room through the wire rope fixing joint 102, and the L-shaped interlock plate 101 is provided with a mounting hole and is connected to the electromagnetic lock 104 baffle 103 through the mounting hole; the C-shaped interlock plate 106 ... The lock plate 106 is provided with a lock rod guide hole and is fixedly installed on the cable room door 11; the I-shaped interlocking plate 107 is installed on the L-shaped interlocking plate 108, and the L-shaped interlocking plate 108 is provided with a rivet nut hole and is installed on the cable room door 11 through the rivet nut hole; the reverse interlocking plate 109 is connected to the middle plate of the L-shaped interlocking plate 101 through a hexagon socket bolt with a lock nut, one end of the reverse interlocking plate 109 is welded and fixed to the I-shaped interlocking plate 110, and the other end of the reverse interlocking plate 109 is inserted into the guide groove of the side panel of the L-shaped interlocking plate 101;

[0049] The steel wire rope fixing joint 102 is fixed to the cross beam of the cable room and also fixes the steel wire rope sheath;

[0050] Wherein, the door interlocking rod 105 is composed of a locking rod and a round tube head;

[0051] Among them, an oblong hole is provided on the I-shaped interlocking plate 107 for adjusting the front-to-back distance, and the diameter of the oblong hole is 3-5 mm.

[0052] like Figures 8 to 10 As shown, the loose nut includes a hexagonal nut and a hexagonal anti-loosening sleeve; six evenly distributed limit heads are fixed on the inner side of the hexagonal anti-loosening sleeve, and a limit groove used in conjunction with the limit head is opened on the side of the hexagonal nut; the hexagonal nut is assembled on the hexagonal bolt through threads and abuts against the countersunk hole of the interlocking plate to be fixed, and the outer wall of the hexagonal anti-loosening sleeve is interference fit with the inner wall of the countersunk hole through anti-slip grooves, so the hexagonal nut is not easy to rotate, thereby achieving the locking of the anti-loosening nut.

[0053] like Figure 4 As shown, the three-position interlocking mechanism 2 is provided with an interlocking block 1 201 installed on the transmission shaft of the three-position disconnector, and an interlocking block 202 is fixedly installed on the interlocking block 1 201 .

[0054] like Figures 5 and 6As shown, the circuit breaker interlocking mechanism includes a circuit breaker interlocking part 3 and a circuit breaker reverse interlocking part 4; the circuit breaker interlocking part 3 is provided with a circuit breaker interlocking rod 301 and a circuit breaker crank arm 302, and a circular wire pressing plate for fixing a steel wire rope is welded at the lower end of the circuit breaker interlocking rod 301, and is connected to the circuit breaker crank arm 302 by threads; the circuit breaker reverse interlocking part 4 is provided with an I-shaped interlocking plate 3 401, an I-shaped interlocking plate 402 and a Z-shaped interlocking plate 403; The I-shaped interlocking plate 401 is fixed to the circuit breaker mechanism by bolts and is used to guide and fix the spring of the I-shaped interlocking plate 402; one end of the Z-shaped interlocking plate 403 is fixed to the bottom plate of the mechanism compartment 6, and the other end of the Z-shaped interlocking plate 403 is provided with a guide groove for guiding the I-shaped interlocking plate 402 when it moves up and down. A round hole is opened at one end of the I-shaped interlocking plate 402 for connecting the cotter pin fixing spring, and the other end of the I-shaped interlocking plate 402 is connected to the wire rope.

[0055] In summary, the two door interlocking rods 105 in the door interlocking mechanism 1 are connected to the circuit breaker interlocking rod 301 of the circuit breaker interlocking part 3 and the interlocking block 2 202 in the three-position interlocking mechanism 2 through steel wire ropes respectively.

[0056] A method for using the inflatable cabinet lifting type mechanical interlocking system is implemented using the above-mentioned inflatable cabinet lifting type mechanical interlocking system, and its specific operating steps are as follows:

[0057] S1. When the circuit breaker is in the open state and the three-position is in the isolated position or the isolated closed position (i.e. the line side is not grounded), the door interlocking rod 105 is inserted into the oblong hole on the I-shaped interlocking plate 107 to form a lock with the cable room door 11. At this time, the cable room door 11 cannot be opened;

[0058] S2. When the circuit breaker is closed, the circuit breaker arm 302 drives the circuit breaker interlocking rod 301 to move upward, and the circular wire pressing plate on the circuit breaker interlocking rod 301 pulls the wire rope upward, and the wire rope drives the attached Figure 3 The left door interlocking rod 105 moves upward, and the spring on the left door interlocking rod 105 is in a compressed state. At this time, the circuit breaker and the cable room door 11 are unlocked;

[0059] S3, when the three-position interlocking mechanism 2 is operated from the isolation position to the grounding position, the interlocking block 1 201 rotates rightward, and the interlocking block 2 202 on it pulls the wire rope, and the wire rope drives the attached Figure 3 The right door interlocking rod 105 moves upward, and the spring on the right door interlocking rod 105 is in a compressed state. At this time, the lock between the three workstations and the cable room door 11 is released;

[0060] S4. When the circuit breaker is open and the three-position switch is not in the grounding position, the door interlocking rod 105 falls under the action of the spring force. At this time, the circuit breaker, the three-position switch and the cable room door 11 are locked, and the cable room door 11 cannot be opened;

[0061] S5. When the cable room door 11 is in the closed state, the cable room door 11 pushes the attached Figure 3 The reverse interlocking plate 109 rotates downward, and the I-type interlocking plate 110 of the reverse interlocking plate 109 pulls the wire rope, and the wire rope drives the attached Figure 6 The middle I-shaped interlocking plate 402 moves downward, at which time the interlock between the I-shaped interlocking plate 402 and the circuit breaker opening button is released, the spring on the I-shaped interlocking plate 402 is in a compressed state, and the circuit breaker can be manually opened;

[0062] S6. When the cable room door 11 is in the open state, the I-shaped interlocking plate 402 moves upward under the action of the spring force to block the circuit breaker opening button, and the circuit breaker cannot be manually opened.

[0063] 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 lifting type mechanical interlocking system for an inflatable cabinet, the inflatable cabinet comprising an inflatable part and a non-inflatable part; The inflatable part includes an inflatable compartment; a three-position isolating switch and a circuit breaker are installed in the inflatable compartment; The non-inflatable part includes a mechanism compartment and a cable compartment, wherein the cable compartment is distributed below the mechanism compartment; the non-inflatable part also includes an instrument compartment, a busbar compartment and a pressure relief channel, wherein the instrument compartment is located above the mechanism compartment, wherein the busbar compartment and the pressure relief channel are located above and beside the inflatable compartment respectively; Features: The lifting type mechanical interlocking system comprises a three-position interlocking mechanism and a circuit breaker interlocking mechanism installed in the mechanism compartment, and a room door interlocking mechanism installed in the cable compartment; wherein the three-position interlocking mechanism, the circuit breaker interlocking mechanism and the room door interlocking mechanism are sequentially arranged from top to bottom and are mechanically linked to each other; The three-position interlocking mechanism and the circuit breaker interlocking mechanism are respectively connected to the three-position isolating switch and the circuit breaker in the air-filled compartment; a cable compartment door is installed at the rear of the cable compartment cabinet, and the compartment door interlocking mechanism is connected to the cable compartment door.

2. The inflatable cabinet lifting type mechanical interlocking system according to claim 1 is characterized in that: The door interlocking mechanism comprises an L-shaped interlocking plate 1, a wire rope fixing joint, an electromagnetic lock baffle, an electromagnetic lock, a door interlocking rod, a C-shaped interlocking plate, an I-shaped interlocking plate 1, an L-shaped interlocking plate 2, a reverse interlocking plate and an I-shaped interlocking plate 2; The L-shaped interlocking plate 1 is fixed to the crossbeam of the cable room through a steel wire rope fixing joint, and the L-shaped interlocking plate 1 is provided with a mounting hole and is connected to the electromagnetic lock baffle through the mounting hole; the C-shaped interlocking plate is provided with a locking rod guide hole and is fixedly installed on the cable room door; the I-shaped interlocking plate 1 is installed on the L-shaped interlocking plate 2, and the L-shaped interlocking plate 2 is provided with a rivet nut hole and is installed on the cable room door through the rivet nut hole; the reverse interlocking plate is connected to the middle plate of the L-shaped interlocking plate 1 through a hexagon socket bolt with a lock nut, one end of the reverse interlocking plate is welded and fixed to the I-shaped interlocking plate 2, and the other end of the reverse interlocking plate is inserted into the guide groove of the side panel of the L-shaped interlocking plate 1.

3. The inflatable cabinet lifting type mechanical interlocking system according to claim 2 is characterized in that: The steel wire rope fixing joint is fixed on the cross beam of the cable room and also fixes the steel wire rope sheath.

4. The inflatable cabinet lifting type mechanical interlocking system according to claim 3 is characterized in that: The door interlocking rod is composed of a locking rod and a round tube head.

5. The inflatable cabinet lifting type mechanical interlocking system according to claim 4 is characterized in that: The I-shaped interlocking plate is provided with an oblong hole for adjusting the front-rear distance, and the diameter of the oblong hole is 3-5 mm.

6. The inflatable cabinet lifting type mechanical interlocking system according to claim 5, characterized in that: The anti-loosening nut comprises a hexagonal nut and a hexagonal anti-loosening sleeve; six evenly distributed limiting heads are fixed on the inner side of the hexagonal anti-loosening sleeve, and a limiting groove for use with the limiting head is provided on the side of the hexagonal nut; The hexagonal nut is assembled on the hexagonal bolt through threads and abuts against the countersunk hole of the interlocking plate to be fixed. The outer wall of the hexagonal anti-loosening sleeve is interference-fitted with the inner wall of the countersunk hole through anti-slip grooves, thereby locking the anti-loosening nut.

7. The inflatable cabinet lifting type mechanical interlocking system according to claim 6, characterized in that: The three-station interlocking mechanism is provided with an interlocking block 1 installed on the transmission shaft of the three-station isolating switch, and an interlocking block 2 is fixedly installed on the interlocking block 1.

8. The inflatable cabinet lifting type mechanical interlocking system according to claim 7 is characterized in that: The circuit breaker interlocking mechanism includes a circuit breaker interlocking part and a circuit breaker reverse interlocking part; The circuit breaker interlocking part is provided with a circuit breaker interlocking rod and a circuit breaker crank arm. A circular wire pressing plate for fixing a steel wire rope is welded at the lower end of the circuit breaker interlocking rod and is connected to the circuit breaker crank arm by threads. The reverse interlocking part of the circuit breaker is provided with an I-shaped interlocking plate three, an I-shaped interlocking plate four and a Z-shaped interlocking plate; the I-shaped interlocking plate three is fixed to the circuit breaker mechanism by bolts and is used for guiding and fixing the spring of the I-shaped interlocking plate four; one end of the Z-shaped interlocking plate is fixed to the bottom plate of the mechanism compartment, and the other end of the Z-shaped interlocking plate is provided with a guide groove for guiding the I-shaped interlocking plate four when it moves up and down, one end of the I-shaped interlocking plate four is provided with a round hole for connecting the cotter pin fixing spring, and the other end of the I-shaped interlocking plate four is connected to the wire rope.

9. The inflatable cabinet lifting type mechanical interlocking system according to claim 8, characterized in that: The two door interlocking rods in the door interlocking mechanism are respectively connected with the circuit breaker interlocking rod of the circuit breaker interlocking part and the interlocking block two in the three-station interlocking mechanism through steel wire ropes.

10. A method for using a lifting mechanical interlocking system of an inflatable cabinet, characterized in that: The inflatable cabinet lifting mechanical interlocking system according to claim 9 is implemented, and the specific operation steps are as follows: S1. When the circuit breaker is in the open state and the third position is in the isolation position or isolation closed position, the door interlocking rod is inserted into the oblong hole on the I-shaped interlocking plate to lock with the cable door, and the cable door cannot be opened at this time; S2. When the circuit breaker is closed, the circuit breaker arm drives the circuit breaker interlocking rod to move upward, and the circular wire pressing plate on the circuit breaker interlocking rod pulls the wire rope upward. The wire rope drives the left door interlocking rod to move upward. The spring on the left door interlocking rod is in a compressed state. At this time, the circuit breaker and the cable room door are unlocked; S3, when the three-station interlocking mechanism is operated from the isolation position to the grounding position, the interlocking block 1 rotates to the right and the interlocking block 2 is provided on it to pull the wire rope, and the wire rope drives the right door interlocking rod to move upward, and the spring on the right door interlocking rod is in a compressed state, at this time, the three-station and cable room door are unlocked; S4. When the circuit breaker is open and the three-position switch is not in the grounding position, the door interlocking rod falls under the action of the spring force. At this time, the circuit breaker, the three-position switch and the cable room door are locked, and the cable room door cannot be opened; S5. When the cable room door is in the closed state, the cable room door pushes the reverse interlocking plate to rotate downward, and the I-shaped interlocking plate 2 of the reverse interlocking plate pulls the wire rope, and the wire rope drives the I-shaped interlocking plate 4 to move downward. At this time, the interlock between the I-shaped interlocking plate 4 and the circuit breaker opening button is released, and the spring on the I-shaped interlocking plate 4 is in a compressed state, and the circuit breaker can be manually opened; S6. When the cable room door is in the open state, the I-shaped interlocking plate 4 moves upward under the action of the spring force to block the circuit breaker opening button, and the circuit breaker cannot be manually opened.

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