CN108155039A - Five-prevention mechanical locking interlocking device of high-voltage switch cabinet - Google Patents

Abstract

The invention discloses a five-prevention mechanical locking interlocking device of a high-voltage switch cabinet, which structurally comprises a high-voltage switch cabinet body, a high-voltage switch cabinet door, a first linkage switch, a bottom pulley bracket, a main linkage switch, a top pulley bracket, a second linkage switch and a traction wire, wherein the first linkage switch is provided with a first linkage keyhole, a first rotating rod, a first fixing plate, a first linkage supporting rod and a first lock core channel, and the main linkage switch is provided with a main linkage keyhole, a main lock core channel, a main linkage supporting rod, a main linkage fixing plate, a main spring compression rod and a main lock fixing rod, so that when equipment is used, the high-voltage switch cabinet can be prevented from being kept closed under a normal state and being opened by non-working personnel, the high-voltage switch cabinet can be prevented from being damaged artificially, hidden potential safety hazards can be avoided simultaneously, and when the high-voltage switch cabinet is opened by the working personnel, and all switches can be opened by opening one switch, so that the switch is convenient and practical.

Description

A five-proof mechanical locking interlocking device for high-voltage switchgear

technical field

The invention is a five-proof mechanical locking and interlocking device for a high-voltage switch cabinet, which belongs to the field of high-voltage switch cabinets.

Background technique

High-voltage switchgear refers to the role of on-off, control or protection in power system power generation, transmission, distribution, power conversion and consumption. High-voltage switchgear is used as electrical products with a voltage level of 3.6kV ~ 550kV, and high-voltage isolating switches And grounding switch, high-voltage load switch, high-voltage automatic recloser and sectionalizer, high-voltage operating mechanism, high-voltage explosion-proof power distribution device and high-voltage switchgear and other major categories.

High-voltage switchgear is an important equipment in the power supply and distribution system, including vacuum circuit breakers, isolating switches and grounding switches. ;Prevent the load from opening and closing the load switch; prevent the grounding switch from closing the circuit breaker and isolating switch when it is in the closed position; prevent the grounding switch from being mistakenly closed when it is live;

When the existing technology is used, because the high-voltage switchgear is an important equipment in the power supply and distribution system, it is the hub that controls the high-voltage circuit, so it is necessary to protect the high-voltage switching in the normal state to avoid being maliciously damaged by humans, or make personnel Cause accidental electric shock, but under normal conditions, the high-voltage switchgear mostly uses ordinary locks to lock the cabinet door, and the ordinary locks are easy to be pried open, which makes the high-voltage switchgear a potential safety hazard.

Contents of the invention

Aiming at the deficiencies in the existing technology, the purpose of the present invention is to provide a five-proof mechanical locking interlocking device for high-voltage switchgear to solve the problem that the high-voltage switchgear is an important device in the power supply and distribution system when using the existing technology. It is the hub of the high-voltage circuit, so it is necessary to protect the high-voltage switchgear under normal conditions to avoid malicious damage or accidental electric shocks. However, under normal conditions, the high-voltage switchgear is mostly locked by ordinary locks. Ordinary locks are easy to be pried open, making the high-voltage switchgear a potential safety hazard.

In order to achieve the above object, the present invention is achieved through the following technical solutions: a five-proof mechanical locking interlocking device for a high-voltage switchgear, the structure of which includes a high-voltage cabinet body, a high-voltage cabinet switch door, a first linkage switch, and a bottom pulley bracket , the main linkage switch, the top pulley bracket, the second linkage switch, and the traction line. The high-voltage cabinet body is connected to the outer surface of the first linkage switch and the second linkage switch by bolt riveting, and the high-voltage cabinet switch door is riveted by bolts. The first linkage switch is embedded on the outer surface of the switch door of the high-voltage cabinet, the bottom pulley bracket is riveted on the inner wall of the switch door of the high-voltage cabinet by bolts, and the main linkage switch Embedded in the middle part of the outer surface of the high-voltage cabinet switch door, the top pulley bracket is connected to the inner wall of the high-voltage cabinet switch door by bolt riveting, the second linkage switch is embedded above the main linkage switch, and the traction line is connected to the Between the main linkage switch, the first linkage switch, and the second linkage switch, the high-voltage cabinet body is provided with a bottom fixing groove, a top fixing groove, and a main switch fixing groove, and the bottom fixing groove is embedded in the bottom of the high-voltage cabinet body On the inner wall, the top fixing groove is embedded on the upper inner wall of the high-voltage cabinet body, and the main switch fixing groove is embedded on the inner wall inside the high-voltage cabinet body; the first linkage switch is provided with a first linkage keyhole, The first rotating rod, the first fixing plate, the first linkage rod, and the first lock cylinder passage, the first linkage keyhole is embedded in one end of the first lock cylinder passage, and the first rotation rod is embedded in the first lock cylinder passage. At the other end of the lock cylinder passage, the first fixing plate is connected to the top end of the first lock cylinder passage through thread engagement, the first linkage rod is connected to the first rotating rod through thread engagement, and the first lock cylinder passage is embedded It is located between the first linkage keyhole and the first fixed plate; the bottom pulley bracket is provided with a bottom movable pulley, and the bottom movable pulley is connected to the bottom pulley bracket by bolt riveting; the main linkage switch is provided with a main Linkage keyhole, main lock cylinder passage, main linkage support rod, main linkage fixing plate, main spring pressure rod, main lock fixing rod, the main linkage keyhole is embedded in one end of the main lock cylinder passage, and the main lock cylinder passage Embedded between the main linkage keyhole and the main linkage fixing plate, the main linkage rod is connected to the main linkage rotating rod through thread engagement, and the main linkage fixing plate is connected to one end of the main linkage rotating rod through thread engagement, so The main spring pressing bar is embedded between the main linkage fixing plate and the main lock fixing bar, and the main lock fixing bar is riveted to the main spring pressing bar through fixing screws; the top pulley bracket is provided with a top movable pulley, The top movable pulley is connected to the top pulley support by bolt riveting.

Further, the first linkage strut is provided with a first traction line fixing ring and a first linkage strut hook, the first traction line fixing ring is welded to one end of the first linkage strut, and the first linkage strut The hook is welded to the other end of the first linkage pole.

Further, the main linkage pole is provided with a main linkage pole fixing ring, and the main linkage pole fixing ring is vertically welded to both ends of the main linkage pole, and the main linkage pole is connected to the main linkage pole through thread engagement. on the pole.

Further, the main spring pressing bar is provided with a return spring, a fixing screw, and a micro-moving contact rod, the returning spring is embedded on the outer surface of the main spring pressing bar, and the fixing screw is connected to the main spring pressing bar through thread engagement Between the fixed rod of the main lock, the micro-motion contact rod is embedded in the channel of the main lock cylinder.

Further, the main lock fixing rod is provided with a movable limit groove, and the movable limit groove is embedded on the outer surface of the upper end of the main lock fixing rod, and the main lock fixing rod is riveted and connected to the main spring pressure by fixing screws. on the pole.

Further, the second interlocking switch is provided with a second interlocking keyhole, a second rotating rod, a second fixing plate, a second interlocking pole, and a second lock cylinder channel, and the second interlocking keyhole is embedded in the first One end of the two lock cylinder passages, the second rotating rod is embedded in the other end of the second lock cylinder passage, the second fixing plate is connected to the top of the second lock cylinder passage through threaded engagement, and the second linkage rod is threaded The second lock core channel is embedded between the second interlocking keyhole and the second fixing plate.

Further, the second linkage strut is provided with a second traction line fixing ring and a second linkage strut hook, the second traction line fixing ring is welded to one end of the second linkage strut, and the second linkage strut The hook is welded to the other end of the second linkage pole.

Beneficial effect

When the five-proof mechanical locking and interlocking device of a high-voltage switch cabinet of the present invention is working, a main linkage switch is provided. Fixed plate, main spring pressure rod, main lock fixed rod, when the key is inserted into the main linkage keyhole, the key pushes the micro-touch lever to move, and the micro-touch lever triggers the main spring pressure rod to drive the main lock fixed rod to move, and the main lock fixed rod Get out of the main switch fixing slot and unlock the main linkage switch lock;

By providing a first linkage switch, the first linkage switch is provided with a first linkage keyhole, a first rotating rod, a first fixed plate, a first linkage pole, and a first lock cylinder channel, when the main linkage switch When the key rotates, it drives the first rotating rod to rotate, and the first rotating rod drives the first linkage rod to rotate, thereby driving the displacement of the traction line, which is connected between the main linkage switch and the first linkage switch. When the wire drives the first linkage pole to move down, the hook of the second linkage pole at the other end breaks away from the top fixing groove, so that the lock of the first linkage switch is unlocked;

By providing a second linkage switch, the second linkage switch is provided with a second linkage keyhole, a second rotating rod, a second fixing plate, a second linkage pole, and a second lock cylinder channel, when the main linkage switch When the key rotates, it drives the second rotating rod to rotate, and the second rotating rod drives the second linkage rod to rotate, thereby driving the displacement of the traction line, which is connected between the main linkage switch and the second linkage switch. When the wire drives the second linkage pole to move down, the hook of the second linkage pole at the other end breaks away from the bottom fixing groove, so that the lock of the second linkage switch is unlocked;

Through the mutual cooperation of the above devices, it is possible to avoid keeping the high-voltage switchgear closed under normal conditions and not being opened by non-working personnel, ensuring that the high-voltage switchgear will not be damaged by man-made, and at the same time avoiding hidden safety hazards. When the staff opens the high-voltage switchgear, they can also open all the switches by turning on one switch, which is convenient and practical.

Description of drawings

Other characteristics, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

Fig. 1 is a structural schematic diagram of a five-proof mechanical locking interlocking device of a high-voltage switchgear in a closed state according to the present invention.

Fig. 2 is a structural schematic diagram of the five-proof mechanical locking interlocking device of the high-voltage switchgear in the unlocked state of the present invention.

Fig. 3 is a structural schematic diagram of the five-proof mechanical locking interlocking device of the high-voltage switchgear in the unlocked state of the present invention.

Fig. 4 is a schematic diagram of the internal plane structure of the switch door of the high voltage cabinet of the present invention.

Fig. 5 is a schematic diagram of the structure of the high-voltage cabinet of the present invention when the switch door is opened.

Fig. 6 is a schematic structural diagram of the first linkage switch of the present invention.

Fig. 7 is a schematic structural diagram of the master linkage switch in a static state according to the present invention.

Fig. 8 is a schematic diagram of an enlarged structure of the main linkage switch of the present invention.

Fig. 9 is a schematic structural diagram of the main linkage switch in the working state of the present invention.

Fig. 10 is a structural schematic diagram of the main linkage switch in the working state of the present invention.

Fig. 11 is a schematic diagram of the enlarged structure of the second linkage switch of the present invention.

In the figure: high-voltage cabinet cabinet-1, high-voltage cabinet switch door-2, first linkage switch-3, bottom pulley bracket-4, main linkage switch-5, top pulley bracket-6, second linkage switch-7, traction Line-8, bottom fixing slot-10, top fixing slot-11, main switch fixing slot-12, first linkage keyhole-30, first rotating rod-31, first fixing plate-32, first linkage support rod -33, the first traction line fixing ring-330, the first linkage rod hook-331, the first lock cylinder channel-34, the bottom movable pulley-40, the main linkage keyhole-50, the main lock cylinder channel-51, the main lock cylinder Linkage rod-52, main linkage rod fixing ring-520, main linkage fixing plate-53, main spring pressure rod-54, return spring-540, fixing screw-541, main lock fixing rod-55, movable limit slot -550, top movable pulley-60, first linkage keyhole-70, second rotating rod-71, second fixed plate-72, second linkage pole-73, second traction wire fixing ring-730, second Linkage rod hook-731, second lock cylinder channel-74.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

Please refer to Fig. 1-Fig. 11, the present invention provides a technical scheme of a five-proof mechanical locking interlocking device for a high-voltage switchgear: its structure includes a high-voltage cabinet body 1, a high-voltage cabinet switch door 2, a first linkage switch 3, and a bottom pulley bracket 4. The main linkage switch 5, the top pulley bracket 6, the second linkage switch 7, and the traction wire 8. The high-voltage cabinet body 1 is connected to the outer surfaces of the first linkage switch 3 and the second linkage switch 7 by bolt riveting. The switch door 2 of the high-voltage cabinet is riveted on the outer surface of the high-voltage cabinet body 1 by bolts, the first linkage switch 3 is embedded on the outer surface of the switch door 2 of the high-voltage cabinet, and the bottom pulley bracket 4 is riveted by bolts Connected to the inner wall of the switch door 2 of the high-voltage cabinet, the main linkage switch 5 is embedded in the middle part of the outer surface of the switch door 2 of the high-voltage cabinet, and the top pulley bracket 6 is connected to the inner wall of the switch door 2 of the high-voltage cabinet by bolt riveting. The second linkage switch 7 is embedded above the main linkage switch 5, the traction line 8 is connected between the main linkage switch 5, the first linkage switch 3, and the second linkage switch 7, and the high-voltage cabinet body 1 is provided with Bottom fixing groove 10, top fixing groove 11, main switch fixing groove 12, the bottom fixing groove 10 is embedded on the bottom inner wall of the high voltage cabinet body 1, and the top fixing groove 11 is embedded on the upper inner wall of the high voltage cabinet body 1 Above, the main switch fixing groove 12 is embedded on the inner wall of the high-voltage cabinet body 1; the first linkage switch 3 is provided with a first linkage keyhole 30, a first rotating rod 31, a first fixing plate 32, a second A linkage rod 33 and a first lock cylinder passage 34, the first linkage keyhole 30 is embedded in one end of the first lock cylinder passage 34, and the first rotating rod 31 is embedded in the other end of the first lock cylinder passage 34 , the first fixing plate 32 is connected to the top end of the first lock cylinder channel 34 through threaded engagement, the first linkage rod 33 is connected to the first rotating rod 31 through threaded engagement, and the first lock cylinder channel 34 is embedded Set between the first linkage keyhole 30 and the first fixed plate 32; the bottom pulley bracket 4 is provided with a bottom movable pulley 40, and the bottom movable pulley 40 is connected to the bottom pulley bracket 4 by bolt riveting; The main linkage switch 5 is provided with a main linkage keyhole 50, a main lock cylinder channel 51, a main linkage support rod 52, a main linkage fixing plate 53, a main spring pressing bar 54, and a main lock fixing rod 55. Set at one end of the main lock cylinder passage 51, the main lock cylinder passage 51 is embedded between the main linkage keyhole 50 and the main linkage fixing plate 53, and the main linkage rod 52 is connected to the main linkage rotating rod 542 through thread engagement Above, the main linkage fixing plate 53 is connected to one end of the main linkage rotating rod 542 through thread engagement, and the main spring pressing rod 54 is embedded between the main linkage fixing plate 53 and the main lock fixing rod 55, and the main lock is fixed Rod 55 is riveted on the main spring pressure bar 54 by fixing screw 542; Described top pulley support 6 is provided with top movable pulley 60, and described top movable pulley 60 is connected on the top pulley support 6 by bolt riveting, described The first linkage pole 33 is provided with a first traction line fixing ring 330 and a first linkage pole hook 331, and the first traction line The fixing ring 330 is welded to one end of the first linkage pole 33, the first linkage pole hook 331 is welded to the other end of the first linkage pole 33, and the main linkage pole 52 is provided with a main linkage pole fixing ring 520, The main linkage pole fixing ring 520 is vertically welded to both ends of the main linkage pole 52, the main linkage pole 52 is connected to the main linkage rotating pole 542 through threaded engagement, and the main spring pressing bar 54 is provided with a reset spring 540, fixing screw 541, micro-movement contact rod 542, the return spring 540 is embedded on the outer surface of the main spring pressing rod 54, and the fixing screw 541 is connected to the main spring pressing rod 54 and the main lock fixing rod 55 through thread engagement Between, the micro-movement contact rod 542 is embedded in the main lock cylinder channel 51, and the main lock fixing rod 55 is provided with a movable limiting groove 550, and the movable limiting groove 550 is embedded in the main lock fixing rod 55 On the outer surface of the upper end, the main lock fixing rod 55 is riveted and connected to the main spring pressing rod 54 through a fixing screw 542, and the second interlocking switch 7 is provided with a second interlocking keyhole 70, a second rotating rod 71, a second Two fixed plates 72, a second linkage rod 73, and a second lock cylinder passage 74, the second linkage keyhole 70 is embedded in one end of the second lock cylinder passage 74, and the second rotating rod 71 is embedded in the second lock cylinder passage 74. At the other end of the lock core channel 74, the second fixing plate 72 is connected to the top of the second lock core channel 74 through threaded engagement, and the second linkage rod 73 is connected to the second rotating rod 71 through threaded engagement. The second lock cylinder channel 74 is embedded between the second interlocking keyhole 70 and the second fixing plate 72, and the second interlocking pole 73 is provided with a second traction line fixing ring 730 and a second interlocking pole hook 731. The second pull wire fixing ring 730 is welded to one end of the second linkage pole 73 , and the second linkage pole hook 731 is welded to the other end of the second linkage pole 73 .

When the user works through this equipment, he can control the first linkage switch and the second linkage switch through the main linkage switch to strengthen the door lock. Avoid malicious damage to the lock or break the door of the high-voltage switchgear.

The return spring of the present invention is a spring structure that deforms under the action of an external force, and the spring can return to its state after the external force is removed.

The problem solved by the present invention is that when the prior art is used, because the patient is an animal that is difficult to control and has natural defensiveness and aggressiveness, it will cause the animal to be uneasy and easily attack people when the headgear is forced to be put on. Protected and easily damaged, it is easy to get heatstroke if wrapped in the auxiliary belt for a long time in summer, which will affect the animal's mood and bring difficulties to the treatment. It is uneasy and easy to attack people. At the same time, a fixed headgear with a sponge ensures that animals will not be harmed. The anti-heatstroke cooling device can avoid heatstroke caused by being wrapped in the auxiliary belt for a long time in summer, which will affect the emotions of animals and bring therapeutic benefits. to difficult questions.

To sum up: when the material of the first linkage strut is stainless steel, the material of the first linkage strut is the strongest and has the best corrosion resistance, so stainless steel is the best choice as the material of the first linkage strut.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or fundamentals of the present invention. The present invention can be implemented in other specific forms without any specific features. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (7)

1. A five-proof mechanical locking interlocking device for a high-voltage switchgear, its structure includes a high-voltage cabinet body (1), a high-voltage cabinet switch door (2), a first linkage switch (3), a bottom pulley bracket (4), a main linkage switch (5), top pulley bracket (6), second linkage switch (7), traction wire (8), the high voltage cabinet body (1) is riveted to the first linkage switch (3) and The outer surface of the second linkage switch (7), the high-voltage cabinet switch door (2) is riveted on the outer surface of the high-voltage cabinet body (1) by bolts, and the first linkage switch (3) is embedded in the high-voltage cabinet On the outer surface of the switch door (2), the bottom pulley bracket (4) is connected to the inner wall of the high-voltage cabinet switch door (2) through bolt riveting, and the main linkage switch (5) is embedded in the high-voltage cabinet switch door (2) ) in the middle part of the outer surface, the top pulley bracket (6) is connected to the inner wall of the switch door (2) of the high voltage cabinet by bolt riveting, and the second linkage switch (7) is embedded above the main linkage switch (5), The traction line (8) is connected between the main linkage switch (5), the first linkage switch (3), and the second linkage switch (7), and is characterized in that: The high-voltage cabinet body (1) is provided with a bottom fixing groove (10), a top fixing groove (11), and a main switch fixing groove (12), and the bottom fixing groove (10) is embedded in the high-voltage cabinet body (1 ) on the bottom inner wall, the top fixing groove (11) is embedded on the upper inner wall of the high voltage cabinet body (1), and the main switch fixing groove (12) is embedded on the inner inner wall of the high voltage cabinet body (1); The first linkage switch (3) is provided with a first linkage keyhole (30), a first rotating rod (31), a first fixing plate (32), a first linkage pole (33), a first lock cylinder channel (34), the first linkage keyhole (30) is embedded in one end of the first lock cylinder channel (34), and the first rotating rod (31) is embedded in the other end of the first lock cylinder channel (34), The first fixing plate (32) is connected to the top end of the first lock cylinder passage (34) through threaded engagement, and the first linkage rod (33) is connected to the first rotating rod (31) through threaded engagement. The first lock cylinder channel (34) is embedded between the first linkage keyhole (30) and the first fixing plate (32); The bottom pulley support (4) is provided with a bottom movable pulley (40), and the bottom movable pulley (40) is connected to the bottom pulley support (4) by bolt riveting; The main linkage switch (5) is provided with a main linkage keyhole (50), a main lock cylinder channel (51), a main linkage support rod (52), a main linkage fixing plate (53), a main spring pressing rod (54), The main lock fixing rod (55), the main linkage keyhole (50) is embedded in one end of the main lock cylinder channel (51), and the main lock cylinder channel (51) is embedded in the main linkage keyhole (50) and the main lock cylinder channel (51). Between the linkage fixing plates (53), the main linkage support rod (52) is connected to the main linkage rotating rod (542) through thread engagement, and the main linkage fixing plate (53) is connected to the main linkage rotation rod through thread engagement (542) one end, the main spring pressure rod (54) is embedded between the main linkage fixing plate (53) and the main lock fixing rod (55), and the main lock fixing rod (55) is fixed by the fixing screw (542) Riveting is connected on the main spring pressure bar (54); The top pulley support (6) is provided with a top movable pulley (60), and the top movable pulley (60) is connected to the top pulley support (6) by bolt riveting. 2. A five-proof mechanical locking interlocking device for a high-voltage switchgear according to claim 1, characterized in that: the first linkage rod (33) is provided with a first traction line fixing ring (330), a first Linkage pole hook (331), the first traction line fixing ring (330) is welded to one end of the first linkage pole (33), and the first linkage pole hook (331) is welded to the first linkage pole ( 33) The other end. 3. A five-proof mechanical locking interlocking device for high-voltage switchgear according to claim 1, characterized in that: the main linkage pole (52) is provided with a main linkage pole fixing ring (520), and the main linkage pole (52) is provided with a main linkage pole fixing ring (520). The linkage pole fixing ring (520) is vertically welded to both ends of the main linkage pole (52), and the main linkage pole (52) is connected to the main linkage rotating pole (542) through thread engagement. 4. A five-proof mechanical locking interlocking device for a high-voltage switchgear according to claim 1, characterized in that: the main spring pressure rod (54) is provided with a return spring (540), a fixing screw (541), a micro The moving contact rod (542), the return spring (540) is embedded on the outer surface of the main spring pressing rod (54), and the fixing screw (541) is connected to the main spring pressing rod (54) and the main lock through thread engagement Between the fixed rods (55), the micro-motion contact rod (542) is embedded in the main lock cylinder channel (51). 5. A five-proof mechanical locking interlocking device for high-voltage switchgear according to claim 1, characterized in that: the main lock fixing rod (55) is provided with a movable limit groove (550), and the movable limit The groove (550) is embedded on the outer surface of the upper end of the main lock fixing rod (55), and the main lock fixing rod (55) is riveted and connected to the main spring pressing rod (54) by a set screw (542). 6. A five-proof mechanical locking interlocking device for a high-voltage switchgear according to claim 5, characterized in that: the second linkage switch (7) is provided with a second linkage keyhole (70), a second rotating rod (71), the second fixed plate (72), the second linkage rod (73), the second lock cylinder passage (74), the second linkage keyhole (70) is embedded in the second lock cylinder passage (74) ) one end, the second rotating rod (71) is embedded in the other end of the second lock cylinder passage (74), and the second fixing plate (72) is connected to the top of the second lock cylinder passage (74) by thread engagement, The second linkage rod (73) is connected to the second rotating rod (71) through threaded engagement, and the second lock cylinder channel (74) is embedded in the second linkage keyhole (70) and the second fixing plate (72). 7. A five-proof mechanical locking interlocking device for a high-voltage switchgear according to claim 6, characterized in that: the second linkage rod (73) is provided with a second traction line fixing ring (730), a second Linkage pole hook (731), the second pull line fixing ring (730) is welded to one end of the second linkage pole (73), and the second linkage pole hook (731) is welded to the second linkage pole ( 73) The other end.