A forced hard interlock type error-proof interlocking device

Abstract

The present invention discloses a forced hard interlock type error-proof interlocking device, which specifically relates to the technical field of high-voltage switches, and includes an interlocking housing, the front of which is fixedly connected with two sealing covers, and the upper and lower surfaces of the two sealing covers are respectively connected to one end of the opposite surfaces of the two elbows, and the corresponding ends of the opposite surfaces of the two elbows are respectively connected to the sides away from the two sealing sleeves. The present invention avoids the situation of false triggering due to the simultaneous activation of multiple switches by setting a trigger block, an airbag and a sealing cover, and after one of the switches on both sides is turned on, the switch on the other side will be difficult to open due to the restrictions of the first push plate and the second push plate, so that the error-proof interlocking device can effectively avoid the situation of multiple switches being started at the same time during use, and avoid the situation of damage to components in the switch cabinet due to the simultaneous triggering of multiple switches, and can prevent the situation of multiple switches being started at the same time due to false touch.

Description

Technical Field

[0001] The present invention relates to the technical field of high voltage switches, and more particularly to a forced hard interlocking type mis-prevention interlocking device. Background Art

[0002] With the rapid development of power systems towards high voltage, large units and large capacity, the increasing expansion of power grids and the popularization and promotion of unmanned management mode and integrated automation of substations, the safe operation of high-voltage switchgear is becoming more and more important.

[0003] High-voltage switchgear is used in places with rated voltage of 10KV and above. It is mainly used to open and close the electrical appliances of the conductive circuit. The high-voltage switch in the high-voltage switchgear is mainly used to isolate and close the high-voltage power supply. The high-voltage switch is composed of a load switch and a grounding switch. The current high-voltage switch has a complex interlocking mechanism connecting the switch and the electrical components, and it is difficult to achieve the effect of preventing accidental touch during use. In the process of normal use, the process adopts a single opening and closing method. If multiple opening and closing occur, it is not only easy to cause a short circuit of the switch, but also easy to damage the electrical components. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a forced hard interlocking type error-proof interlocking device. The technical problem to be solved by the present invention is: the high-voltage switch is composed of a load switch and a grounding switch. The current high-voltage switch and the interlocking mechanism connecting the electrical components are complex, and it is difficult to achieve the effect of preventing accidental touch during use. During conventional use, the process adopts a single opening and closing method. If multiple openings and closings occur, it is not only easy to cause a short circuit in the switch, but also easy to cause damage to the electrical components.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a forced hard interlocking type mis-anti-interlocking device, comprising an interlocking housing, the front of the interlocking housing is fixedly connected with two sealing covers, and the upper surface and the lower surface of the two sealing covers are respectively connected with one end of the opposite surfaces of the two elbows, and the corresponding one end of the opposite surfaces of the two elbows is respectively connected with the side away from the two sealing sleeves, and the four sealing sleeves are slidably connected with extrusion rods, and the opposite surfaces of the corresponding two extrusion rods are respectively fixedly connected with the side away from the first push plate and the second push plate, and the opposite surfaces of the first push plate and the second push plate on one side are fixedly connected by a reinforcement rod, and the outer surfaces of the two sealing covers are respectively fixedly connected with the opposite surfaces of the two connecting plates, and the other surface of the connecting plate is fixedly connected with the outer surface of the limit sleeve.

[0006] An extrusion sleeve is sleeved inside the limiting sleeve, the back side of the extrusion sleeve is fixedly connected to the front side of the fixing plate, the back side of the fixing plate is fixedly connected to the front side of the trigger block, the back side of the trigger block and the front side of the airbag overlap each other, the back side of the airbag is fixedly connected to the front side of the back cover, the two air outlet ends of the airbag are respectively connected to one end of the opposite sides of the two first conduits, and the other ends of the two first conduits pass through the interlocking casing and are connected to the same sealing cover, the front side of the back cover is fixedly connected to the back side of the interlocking casing, four placement grooves are provided on the back side of the back cover, and the first mounting plates are clamped in the four placement grooves.

[0007] As a further solution of the present invention: the limit sleeve is arranged in a semicircular arc shape, the left and right sides of the interlock housing are provided with limit grooves, and the two fixing plates are respectively located in the two limit grooves, and the shape of the fixing plates is adapted to the shape of the limit grooves.

[0008] As a further solution of the present invention: the upper surface and lower surface of the first mounting plate are both provided with card slots, and rotating devices are carded in the two card slots, the outer surface of the rotating device is sleeved with a coil spring, and the opposite surfaces of the two coil springs are fixedly connected to the outer surface of the rotating device, and the two rotating devices are respectively carded on the upper surface of the inner wall of the placement groove and the lower surface of the inner wall, and the ends of the two coil springs that are far away from each other are respectively fixedly connected to the upper surface of the inner wall of the placement groove and the lower surface of the inner wall.

[0009] As a further solution of the present invention: the rotating device is composed of a bearing and a rotating shaft, and the corresponding opposite surfaces of the two first mounting plates are fixedly connected to the opposite surfaces of the two second mounting plates respectively, and the corresponding opposite surfaces of the two first mounting plates are respectively clamped with the opposite surfaces of the two limit blocks, and the front side of the limit block is fixedly connected to one end of the back side of the sliding rod.

[0010] As a further solution of the present invention: the sliding rod is slidably connected in the sliding sleeve, the sliding sleeve is configured as a sealing sliding sleeve, the front side of the sliding sleeve is connected to the back side of the connecting block, and the opposite surfaces of the four connecting blocks are connected through a second conduit, and the two connecting blocks located above are connected to the outer surface of the same sealing tube through the second conduit.

[0011] As a further solution of the present invention: the outer surface of the sealing cylinder is fixedly connected to the back of the inner wall of the interlocking housing, two first sealing blocks are arranged in the sealing cylinder, and the backs of the two first sealing blocks are fixedly connected to the same sleeve, the inner wall of the sleeve is sleeved with a turning handle, and one end of the front side of the turning handle passes through the sealing cylinder and is fixedly connected to two limit rods.

[0012] As a further solution of the present invention: two second sealing blocks are fixedly connected to the outer surface of the turning handle, and the backs of the two second sealing blocks overlap with the fronts of the two first sealing blocks respectively, and the first sealing blocks and the second sealing blocks are both configured as a quarter cylinder.

[0013] As a further solution of the present invention: the inner wall of the sealing cylinder and the outer surface of the push rod are clamped with each other, the push rod is slidably connected in the sealing cylinder, one end of the front side of the push rod is fixedly connected to one end of the back side of the spring, the other end of the spring is fixedly connected to the back side of the first sealing block, a plurality of sealing rings are arranged on the outer surface of the push rod, and four blocking blocks are fixedly connected to the front side of the interlocking housing.

[0014] The beneficial effects of the present invention are:

[0015] 1. The present invention provides a trigger block, a first push plate, a second push plate, an airbag and a sealing cover. When two switches are triggered at the same time, the first push plate and the second push plate on both sides move toward each other at the same time, so that the first push plate and the second push plate are in a squeezed state when they move to the half outer position, making it difficult for the switches to continue to move, thereby avoiding the situation of false triggering due to the simultaneous activation of multiple switches. After one of the switches on both sides is turned on, the switch on the other side will be difficult to open due to the restrictions of the first push plate and the second push plate. Therefore, the false anti-interlocking device can effectively avoid the situation of multiple switches being started at the same time during use, avoid the situation of components in the switch cabinet being damaged due to the simultaneous triggering of multiple switches, and prevent the situation of multiple switches being started at the same time due to false touch.

[0016] 2. The present invention provides a second conduit, a first mounting plate, a second mounting plate and a sealing cylinder. During installation, the interlock housing needs to be squeezed continuously. The squeezing of the interlock housing causes the push rod to move when it contacts the inside of the switch cabinet. At this time, the push rod will squeeze the gas in the sealing cylinder into the second conduits on both sides through the sealing ring during the movement, so that the air pressure in the sliding sleeve increases rapidly. With the movement of the sliding rod, when the first mounting plate and the second mounting plate rotate ninety degrees, the second mounting plate will be clamped and contacted with the back of the switch cabinet to fix the error-proof interlocking device. Compared with the conventional threaded connection method, the time for fixing screws and adjusting holes is reduced, so as to avoid the situation that the screws are rusted during long-term use, causing the error-proof interlocking device to loosen and fall off, and reduce the cumbersome steps in the installation process, thereby improving the assembly efficiency of the error-proof interlocking device.

[0017] 3. The present invention arranges a second sealing block, a first sealing block, a coil spring and a spring. When the mis-protection interlocking device needs to be disassembled and maintained, it is only necessary to rotate the handle so that the positions of the two second sealing blocks coincide with the positions of the two first sealing blocks. At this time, the gas will be quickly discharged to the outside through the gap between the two first sealing blocks. At this time, the coil spring will drive the first mounting plate and the second mounting plate to reset under the action of its own elastic force. At the same time, the spring will also push the push rod to reset, so that the mis-protection interlocking device can be disassembled by rotating the handle ninety degrees during the disassembly process, thereby reducing the difficulty of disassembling the mis-protection interlocking device. The elastic force of the coil spring and the spring can further increase the friction between the push rod and the first mounting plate and the switch cabinet, thereby ensuring the stability of the mis-protection interlocking device after installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 It is a schematic diagram of the three-dimensional cross-sectional structure of the back cover of the present invention;

[0020] Figure 3 It is a schematic cross-sectional structure diagram of a three-dimensional placement groove of the present invention;

[0021] Figure 4 It is a schematic diagram of the three-dimensional cross-sectional structure of the sealing cylinder of the present invention;

[0022] Figure 5 It is a three-dimensional structural schematic diagram of the sealing cover of the present invention;

[0023] Figure 6 It is a schematic diagram of the structure enlarged at A of the present invention;

[0024] In the figure: 1 interlock housing, 2 sealing cover, 3 elbow, 4 sealing sleeve, 5 extrusion rod, 6 first push plate, 7 reinforcement rod, 8 second push plate, 9 connecting plate, 10 limiting sleeve, 11 extrusion sleeve, 12 fixing plate, 13 trigger block, 14 airbag, 15 first conduit, 16 limiting groove, 17 back cover, 18 placement groove, 19 first mounting plate, 20 second mounting plate, 21 card slot, 22 rotating device, 23 coil spring, 24 limiting block, 25 sliding rod, 26 sliding sleeve, 27 connecting block, 28 second conduit, 29 sealing cylinder, 30 first sealing block, 31 sleeve, 32 turning handle, 33 second sealing block, 34 push rod, 35 spring, 36 sealing ring, 37 blocking block. DETAILED DESCRIPTION

[0025] 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 embodiments are only part of the embodiments of the present invention, not all of the 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.

[0026] like Figure 1-6 As shown, the present invention provides a forced hard interlocking type mis-anti-interlocking device, including an interlocking housing 1, two sealing covers 2 are fixedly connected to the front of the interlocking housing 1, and the upper surface and the lower surface of the two sealing covers 2 are respectively connected to one end of the opposite surfaces of the two elbows 3, and the corresponding one end of the opposite surfaces of the two elbows 3 are respectively connected to the side away from the two sealing sleeves 4, and the four sealing sleeves 4 are slidably connected with extrusion rods 5, and the opposite surfaces of the corresponding two extrusion rods 5 are respectively fixedly connected to the side away from the first push plate 6 and the second push plate 8, and the opposite surfaces of the first push plate 6 and the second push plate 8 on one side are fixedly connected by a reinforcing rod 7, and the outer surfaces of the two sealing covers 2 are respectively fixedly connected to the opposite surfaces of the two connecting plates 9, and the other surface of the connecting plate 9 is fixedly connected to the outer surface of the limit sleeve 10.

[0027] The limiting sleeve 10 is sleeved with an extrusion sleeve 11, the back of the extrusion sleeve 11 is fixedly connected to the front of the fixing plate 12, the back of the fixing plate 12 is fixedly connected to the front of the trigger block 13, the back of the trigger block 13 and the front of the airbag 14 overlap each other, the back of the airbag 14 is fixedly connected to the front of the back cover 17, the two air outlet ends of the airbag 14 are respectively connected to one end of the opposite surface of the two first conduits 15, and the other ends of the two first conduits 15 pass through the interlocking housing 1 and are connected to the same sealing cover 2, the front of the back cover 17 is fixedly connected to the back of the interlocking housing 1, and the back of the back cover 17 is provided with four placement grooves 1 8, and the first mounting plates 19 are all clamped in the four placement grooves 18. By arranging the trigger block 13, the first push plate 6, the airbag 14 and the sealing cover 2, the situation of false triggering due to the simultaneous activation of multiple switches is avoided. After one of the switches on both sides is turned on, the switch on the other side will be difficult to open due to the restrictions of the first push plate 6 and the second push plate 8, so that the false anti-interlocking device can effectively avoid the situation of multiple switches being started at the same time during use, and avoid the situation that the components in the switch cabinet are damaged due to the simultaneous triggering of multiple switches. At the same time, the situation that multiple switches are started at the same time due to false touch can be prevented.

[0028] like Figure 1 , Figure 2 and Figure 5As shown, the limit sleeve 10 is set to a semicircular arc shape, and the left and right sides of the interlock housing 1 are provided with limit grooves 16, and the two fixing plates 12 are respectively located in the two limit grooves 16, and the shape of the fixing plate 12 is adapted to the shape of the limit grooves 16. The upper surface and the lower surface of the first mounting plate 19 are provided with a slot 21, and the two slots 21 are both clamped with a rotating device 22, and the outer surface of the rotating device 22 is sleeved with a coil spring 23, and the corresponding opposite surfaces of the two coil springs 23 are fixedly connected to the outer surface of the rotating device 22, and the corresponding two rotating devices 22 are respectively clamped on the upper surface of the inner wall of the placement groove 18 and the lower surface of the inner wall. Because the spring 35 and the coil spring 23 are provided, the friction between the push rod 34 and the first mounting plate 19 and the switch cabinet can be increased by the elastic force of the coil spring 23 and the spring 35, thereby ensuring the stability of the mis-prevention interlocking device after installation, and the ends of the two coil springs 23 that are far away are respectively fixedly connected to the upper surface of the inner wall of the placement groove 18 and the lower surface of the inner wall.

[0029] like Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, the rotating device 22 is composed of a bearing and a rotating shaft. The opposite surfaces of the two first mounting plates 19 are fixedly connected to the opposite surfaces of the two second mounting plates 20 respectively, and the opposite surfaces of the two first mounting plates 19 are respectively engaged with the opposite surfaces of the two limit blocks 24. The front side of the limit block 24 is fixedly connected to one end of the back side of the sliding rod 25. Due to the provision of the first mounting plate 19 and the second mounting plate 20, compared with the conventional threaded connection method, the time for fixing screws and adjusting holes is reduced, and the situation in which the screws are rusted during long-term use and cause the mis-prevention interlocking device to loosen and fall, and the cumbersome steps in the installation process are reduced, thereby improving the assembly efficiency of the mis-prevention interlocking device. The sliding rod 25 is slidably connected in the sliding sleeve 26, and the sliding sleeve 26 is configured as a sealing sliding sleeve 26. The front side of the sliding sleeve 26 is connected to the back side of the connecting block 27, and the opposite surfaces of the four connecting blocks 27 are connected through the second conduit 28, and the two connecting blocks 27 located above are connected to the outer surface of the same sealing cylinder 29 through the second conduit 28.

[0030] like Figure 1 Figure 2 , Figure 3 and Figure 4As shown, the outer surface of the sealing cylinder 29 is fixedly connected to the back of the inner wall of the interlocking housing 1, two first sealing blocks 30 are arranged in the sealing cylinder 29, and the back of the two first sealing blocks 30 is fixedly connected to the same sleeve 31, the inner wall of the sleeve 31 is sleeved with a turning handle 32, one end of the front of the turning handle 32 passes through the sealing cylinder 29 and is fixedly connected to two limiting rods, the outer surface of the turning handle 32 is fixedly connected to two second sealing blocks 33, and the backs of the two second sealing blocks 33 are overlapped with the fronts of the two first sealing blocks 30 respectively, the first sealing blocks 30 and the second sealing blocks 33 are both set to a quarter cylinder, and the inner wall of the sealing cylinder 29 and the outer surface of the push rod 34 are clamped with each other, Because the first sealing block 30, the second sealing block 33 and the turning handle 32 are provided, the position of the two second sealing blocks 33 and the two first sealing blocks 30 are overlapped by rotating the turning handle 32, so that the error-proof interlocking device can be disassembled by rotating the turning handle 32 ninety degrees during the disassembly process, thereby reducing the difficulty of disassembling the error-proof interlocking device. The push rod 34 is slidably connected in the sealing cylinder 29, and one end of the front side of the push rod 34 is fixedly connected to one end of the back side of the spring 35, and the other end of the spring 35 is fixedly connected to the back side of the first sealing block 30. A plurality of sealing rings 36 are provided on the outer surface of the push rod 34, and four blocking blocks 37 are fixedly connected to the front side of the interlocking housing 1.

[0031] Working principle of the present invention: When in use, the error-proof interlocking device needs to be installed at a designated position in the switch cabinet. The error-proof interlocking device can be installed by passing four second mounting plates 20 through the holes opened in the switch cabinet and fitting the rear cover 17 to the inner wall of the switch cabinet. During installation, the interlocking housing 1 needs to be continuously squeezed. By squeezing the interlocking housing 1, the push rod 34 moves when it contacts the inside of the switch cabinet. At this time, the push rod 34 squeezes the gas in the sealing tube 29 into the second conduits 28 on both sides through the sealing ring 36 during the movement, so that The air pressure in the sliding sleeve 26 rises rapidly. At this time, the sliding rod 25 will push the limit block 24 under the action of the gas pressure in the sliding sleeve 26 and squeeze the first mounting plate 19 to rotate along the rotating device 22. As the sliding rod 25 moves, when the first mounting plate 19 and the second mounting plate 20 rotate 90 degrees, the second mounting plate 20 will be clamped and contacted with the back of the switch cabinet to fix the error-proof interlocking device. When the error-proof interlocking device needs to be disassembled and maintained, it is only necessary to turn the handle 32 so that the two second sealing blocks 33 and the two first sealing blocks 3 0 coincides, at this time, the gas will be quickly discharged to the outside through the gap between the two first sealing blocks 30, at this time, the coil spring 23 will drive the first mounting plate 19 and the second mounting plate 20 to reset under the action of its own elastic force, and at the same time, the spring 35 will also push the push rod 34 to reset, when the electrical components are controlled by the high-voltage switch, the high-voltage switch will drive the extrusion sleeve 11 to move, so that the extrusion sleeve 11 will push the airbag 14 through the fixing plate 12 and the trigger block 13 during the movement, so that the gas in the airbag 14 will be discharged into the sealing cover 2 on one side through the first conduit 15, and then the sealing cover 2 will drive the extrusion rod 5 on one side to move by discharging the gas into the sealing sleeve 4. When the two switches are triggered at the same time, since the first push plates 6 and the second push plates 8 on both sides move toward each other at the same time, the first push plates 6 and the second push plates 8 will be in a squeezed state when they move to the half-outer position, making it difficult for the switches to continue to move, avoiding the situation of false triggering due to the simultaneous activation of multiple switches, and after one of the switches on both sides is turned on, the switch on the other side will be difficult to open due to the restrictions of the first push plates 6 and the second push plates 8.

[0032] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0033] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0034] Finally: The above description is only a preferred embodiment of the present invention and is 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 forced hard interlock type error-proof interlock device, comprising an interlock housing (1), characterized in that: The front of the interlock housing (1) is fixedly connected to two sealing covers (2), and the upper surface and the lower surface of the two sealing covers (2) are respectively connected to one end of the opposite surface of the two elbows (3), and the corresponding one end of the opposite surface of the two elbows (3) is respectively connected to the side away from the two sealing sleeves (4), and the four sealing sleeves (4) are slidably connected with an extrusion rod (5), and the opposite surface of the corresponding two extrusion rods (5) is respectively fixedly connected to the side away from the first push plate (6) and the second push plate (8), and the opposite surface of the first push plate (6) and the second push plate (8) on one side is fixedly connected by a reinforcing rod (7), and the outer surfaces of the two sealing covers (2) are respectively fixedly connected to the opposite surfaces of the two connecting plates (9), and the other surface of the connecting plate (9) is fixedly connected to the outer surface of the limit sleeve (10); The limiting sleeve (10) is sleeved with an extrusion sleeve (11), the back side of the extrusion sleeve (11) is fixedly connected to the front side of the fixing plate (12), the back side of the fixing plate (12) is fixedly connected to the front side of the trigger block (13), the back side of the trigger block (13) and the front side of the airbag (14) overlap each other, the back side of the airbag (14) is fixedly connected to the front side of the rear cover (17), the two air outlet ends of the airbag (14) are respectively connected to one end of the opposite side of the two first conduits (15), and the other ends of the two first conduits (15) pass through the interlocking housing (1) and are connected to the same sealing cover (2), the front side of the rear cover (17) is fixedly connected to the back side of the interlocking housing (1), and the back side of the rear cover (17) is provided with four placement grooves (18), and the first mounting plates (19) are clamped in the four placement grooves (18); The upper surface and the lower surface of the first mounting plate (19) are both provided with a card slot (21), and a rotating device (22) is card-engaged in the two card slots (21), and a coil spring (23) is sleeved on the outer surface of the rotating device (22), and the opposite surfaces of the two coil springs (23) are fixedly connected to the outer surface of the rotating device (22), and the two rotating devices (22) are respectively card-engaged on the upper surface and the lower surface of the inner wall of the placement groove (18), and the ends of the two coil springs (23) that are far away from each other are respectively fixedly connected to the upper surface and the lower surface of the inner wall of the placement groove (18); The rotating device (22) is composed of a bearing and a rotating shaft. The opposite surfaces of the two first mounting plates (19) are fixedly connected to the opposite surfaces of the two second mounting plates (20) respectively. The opposite surfaces of the two first mounting plates (19) are respectively engaged with the opposite surfaces of the two limit blocks (24). The front surface of the limit block (24) is fixedly connected to one end of the back surface of the sliding rod (25). The sliding rod (25) is slidably connected in the sliding sleeve (26), and the sliding sleeve (26) is set as a sealing sliding sleeve (26). The front side of the sliding sleeve (26) is connected to the back side of the connecting block (27), and the opposite sides of the four connecting blocks (27) are connected through the second conduit (28), and the two connecting blocks (27) located at the top are connected to the outer surface of the same sealing cylinder (29) through the second conduit (28); The outer surface of the sealing cylinder (29) is fixedly connected to the back of the inner wall of the interlock housing (1); two first sealing blocks (30) are arranged in the sealing cylinder (29); and the backs of the two first sealing blocks (30) are fixedly connected to the same sleeve (31); the inner wall of the sleeve (31) is sleeved with a turning handle (32); one end of the front side of the turning handle (32) passes through the sealing cylinder (29) and is fixedly connected to two limit rods; Two second sealing blocks (33) are fixedly connected to the outer surface of the turning handle (32), and the back surfaces of the two second sealing blocks (33) overlap with the front surfaces of the two first sealing blocks (30) respectively, and the first sealing blocks (30) and the second sealing blocks (33) are both configured in a quarter-cylindrical shape; The inner wall of the sealing cylinder (29) and the outer surface of the push rod (34) are mutually engaged, and the push rod (34) is slidably connected in the sealing cylinder (29). One end of the front side of the push rod (34) is fixedly connected to one end of the back side of the spring (35), and the other end of the spring (35) is fixedly connected to the back side of the first sealing block (30). A plurality of sealing rings (36) are arranged on the outer surface of the push rod (34), and four blocking blocks (37) are fixedly connected to the front side of the interlocking housing (1).

2. A forced hard interlock type error-proof interlocking device according to claim 1, characterized in that: The limiting sleeve (10) is arranged in a semicircular arc shape, the left and right side surfaces of the interlocking housing (1) are provided with limiting grooves (16), and the two fixing plates (12) are respectively located in the two limiting grooves (16), and the shape of the fixing plates (12) is adapted to the shape of the limiting grooves (16).

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