Relay contact protection structure

Abstract

The application discloses a relay contact protection structure and belongs to the technical field of relays. The relay contact protection structure comprises a relay body, a wiring slot is reserved on the relay body, a dismounting slot is arranged on the relay body and corresponds to the wiring slot, a wiring bolt is rotationally connected in the dismounting slot, a wiring assembly is embedded in the wiring slot, a plurality of upper wiring latticed plates of the wiring assembly are combined with a plurality of inclined lower wiring latticed plates to form arc extinguishing latticed plates, and a first protection assembly is connected to the relay body and corresponds to the wiring slot. In the application, air in the wiring slot is sucked into a protection box through a suction pipe. When two pressure increasing plates stop working, a supporting spring starts to perform an elastic reset movement. The supporting spring pushes a spherical valve into a bucket-shaped cover to form a plugging effect, so that the wiring slot of the relay body tends to be in a vacuum state. The application works with vacuum as arc extinguishing medium. In the vacuum, gas is very thin, and the free travel of electrons is much greater than the distance between contacts.

Description

Technical Field

[0001] The present invention belongs to the technical field of relays, and in particular relates to a relay contact protection structure. Background Art

[0002] As an important component in the power system, the stability and reliability of the relay's contacts are directly related to the safe operation of the entire system. Contact protection is designed to prevent damage or failure of the contacts due to external forces, dust intrusion, moisture corrosion, arc discharge, etc., thereby extending the service life of the relay and improving the stability and reliability of the system.

[0003] The prior art discloses some invention patents in the field of relay technology, among which the invention patent with publication number CN112992603A discloses a relay contact protection structure and its protection method, which belongs to the field of relays, including a substrate, a protective cover, a housing and a relay body, a transmission device is connected to the bottom wall of the first fixed plate, and the transmission device is connected to the first slide rod at one end away from the first fixed plate, and the transmission assembly includes a fixed rod, one end of the fixed rod is connected to the outer wall of the slide device, the other end of the fixed rod is connected to the second fixed plate, the bottom wall of the second fixed plate is connected to the third slide rod, the inner wall of the fixed frame is connected to a limit device, the outer wall of the limit device is connected to the first connecting plate, and the top wall of the relay body is connected There is a placement plate, and a water-absorbing fiber board is connected to the top wall of the placement plate. This technical solution has a simple structure and is easy to operate. It can effectively prevent the abnormal phenomenon of the line at the bottom of the connection point from loosening when the relay body is pulled by external force, and at the same time it can protect the connection point. This technical solution still has some shortcomings during use. Although it can prevent dust and water molecules from entering the interior of the relay, the contact switch of the relay will generate an arc when closing and opening. The size of the arc increases with the size of the current. Especially in DC control systems, the arc generation phenomenon is more serious. The generation of a larger arc will cause: contact erosion, electromagnetic interference, increased loss and reduced overcharge.

[0004] Based on this, the present invention designs a relay contact protection structure to solve the above problems. Summary of the Invention

[0005] The present invention aims to solve the problem that, although existing relay contact protection structures can prevent dust and water molecules from entering the interior of the relay, the relay contact switch generates arcs when closing and opening. The size of the arc increases with the current. In particular, in DC control systems, the arc generation phenomenon is more serious. The generation of large arcs can cause: contact erosion, electromagnetic interference, increased losses, and reduced overcurrent. A relay contact protection structure is proposed to solve the problem that, although existing relay contact protection structures can prevent dust and water molecules from entering the interior of the relay, the relay contact switch generates arcs when closing and opening. The size of the arc increases with the current. In particular, in DC control systems, the arc generation phenomenon is more serious. The generation of large arcs can cause: contact erosion, electromagnetic interference, increased losses, and reduced overcurrent.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A relay contact protection structure includes a relay body, a wiring slot reserved on the relay body, a disassembly slot provided on the relay body corresponding to the wiring slot, a wiring bolt rotatably connected in the disassembly slot, a wiring assembly embedded in the wiring slot, and a plurality of upper wiring grids of the wiring assembly and a plurality of tilted lower wiring grids combined to form an arc extinguishing grid;

[0008] A first protective component is connected to the corresponding wiring slot on the relay body. After the external wire passes through the first wiring hole and the second wiring hole of the first protective component in sequence and is connected to the wiring slot, the protective box of the first protective component forms a space of its own, and the first protective component has a built-in second protective component. The two booster plates of the second protective component are close to each other to support the external wire and suck the air in the wiring slot.

[0009] As a further description of the above technical solution:

[0010] The wiring assembly includes an upper wiring head embedded in the upper inner part of the wiring slot, a threaded hole is opened on the upper wiring head, the wiring bolt is threadedly connected to the threaded hole, multiple upper wiring grids are connected to the bottom of the upper wire joint, multiple upper wiring grids are arranged at an angle outside, the inner bottom of the wiring slot is connected to a lower wiring head, and multiple lower wiring pieces are connected to the lower wiring head.

[0011] As a further description of the above technical solution:

[0012] The lower wiring member includes two adapter side plates connected to the lower wiring head, and the two adapter side plates are rotatably connected to the same adapter shaft. The lower wiring grid is sleeved on the adapter shaft, and two adapter springs are sleeved on the adapter shaft. The adapter shaft is elastically connected to the two adapter side plates respectively through the two adapter springs.

[0013] As a further description of the above technical solution:

[0014] The first protective component includes a protective box connected to the relay body by bolts, a sealing gasket is connected between the protective box and the relay body, the first wiring hole corresponds to the wiring groove opened on the side end surface of the protective box, a protective plate is installed in the port of the protective box, and the second wiring hole corresponds to the first wiring hole opened on the protective plate.

[0015] As a further description of the above technical solution:

[0016] A one-way shut-off piece is clamped at the corner of the side end face of the protective plate, and the one-way shut-off piece includes a suction pipe clamped at the corner of the side end face of the protective plate, a bucket-shaped cover is sleeved in the port of the suction pipe, a ball valve is sleeved in the bucket-shaped cover, a side end face of the ball valve is connected to a movable shaft, the other end of the movable shaft is sleeved with a mesh panel, the mesh panel is sleeved in the suction pipe, a support spring is sleeved on the movable shaft, and the ball valve is elastically supported and connected to the mesh panel through the support spring.

[0017] As a further description of the above technical solution:

[0018] The second protective component includes a first rubber membrane and a second rubber membrane that are sealed and connected to the protective box. The first rubber membrane and the second rubber membrane are respectively located on the upper and lower sides of the first wiring hole. The protective box is sleeved with a first booster and a second booster located on both sides of the first rubber membrane and the second rubber membrane. The first booster and the second booster have the same structure. The first booster includes a booster plate sleeved in the protective box. Nanosand is filled between the booster plate and the first rubber membrane. A plurality of telescopic rods are connected to the side of the booster plate facing away from the first rubber membrane. The other ends of the plurality of telescopic rods are sleeved with telescopic sleeves, and the other ends of the plurality of telescopic sleeves are connected to the inner bottom of the protective box.

[0019] As a further description of the above technical solution:

[0020] The second protection assembly further includes two booster driving members for driving the first booster member and the second booster member toward each other, the booster driving members including a slide rail connected to the inner bottom of the protection box, a track seat slidably sleeved on the slide rail, and a slide rod connected to the track seat;

[0021] Both sides of the bottom of the boosting plate are connected with side support plates, and the opposite surfaces of the two side support plates are provided with track grooves, and the two ends of the sliding rod are respectively slidably connected to the two track grooves.

[0022] As a further description of the above technical solution:

[0023] The side end face of the protective box is provided with a driving groove corresponding to the two boost driving parts, and a driving assembly for providing power to the two boost driving parts is installed in the driving groove, and the driving assembly includes a threaded rod rotatably connected to the inner end face of the driving groove, a threaded cylinder is threadedly connected to the threaded rod, and the threaded cylinder is connected to the slide rail seat, and driven gears are respectively installed in the corresponding driving grooves on the two screw rods, and a driving shaft is rotatably connected to the two driven gears in the driving groove, and a driving gear is installed on the driving shaft, and a toothed belt is connected between the driving gear and the two driven gears, and a sealing cover is sealed on the side end face of the driving groove.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0025] 1. In the present invention, the air in the wiring slot is sucked into the protective box through the suction pipe. When the two booster plates stop moving, the support spring begins to perform elastic reset movement, pushing the spherical valve into the bucket-shaped cover, forming a blocking effect, so that the wiring slot of the relay body forms a vacuum state. The relay works with vacuum as the arc extinguishing medium. In a vacuum, the gas is very thin, and the free travel of electrons is much greater than the distance between the contacts, thereby ensuring the rapid extinction of the arc.

[0026] 2. In the present invention, the two boosting plates are close to each other, and the first rubber membrane and the second rubber membrane are deformed under the action of pressure and wrapped around the external wire. Since the two boosting plates are filled with nano sand between the first rubber membrane and the second rubber membrane, the nano sand has a certain fluidity. Under the action of the pressure of the boosting plates, the nano sand squeezes the first rubber membrane and the second rubber membrane tightly wrapped around the external wire, forming a good sealing effect, preventing external moisture and dust from entering the wiring slot, thereby providing good protection for the wiring contacts of the relay body.

[0027] 3. In the present invention, the spacing between the multiple upper wiring grids and the multiple lower wiring grids is adjusted until the multiple lower wiring grids are parallel to the multiple upper wiring grids. Compared with the previous method in which electricians insert the external wires into the wiring slots with one hand and use a screwdriver with the other hand to twist the wiring bolts, the external wires can be prevented from falling off before being completely fixed. The multiple upper wiring grids and the multiple lower wiring grids form a grid arc extinguishing structure, thereby avoiding the occurrence of adverse phenomena such as electric shock and ablation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the overall structure of a relay contact protection structure proposed by the present invention;

[0029] Figure 2 This is a structural schematic diagram of a first protection component in a relay contact protection structure proposed by the present invention;

[0030] Figure 3 This is a schematic structural diagram of a disassembled one-way current cutoff member in a relay contact protection structure proposed by the present invention;

[0031] Figure 4 This is a structural schematic diagram of a second protection component in a relay contact protection structure proposed by the present invention;

[0032] Figure 5 This is a schematic structural diagram of a drive slot in a relay contact protection structure proposed by the present invention;

[0033] Figure 6 This is a schematic diagram of the structure inside the protection box of a relay contact protection structure proposed by the present invention;

[0034] Figure 7 This is a schematic diagram of the structure of a relay contact protection structure proposed by the present invention;

[0035] Figure 8 A relay contact protection structure proposed by the present invention Figure 7 Schematic diagram of the structure of the wiring assembly;

[0036] Figure 9 This is a structural schematic diagram of a relay contact protection structure proposed by the present invention after being disassembled from another perspective.

[0037] Legend:

[0038] 1. Relay body; 2. Wiring slot; 3. Assembly / disassembly slot; 4. Wiring bolts; 5. Wiring assembly; 501. Upper terminal block; 502. Upper wiring grid; 503. Lower terminal block; 504. Lower terminal block; 5041. Lower wiring grid; 5042. Adapter shaft; 5043. Adapter side plate; 5044. Adapter spring; 6. First protective assembly; 601. Sealing gasket; 602. Protective box; 603. First wiring hole; 604. Protective plate; 605. Second wiring hole; 606. One-way shut-off member; 6061. Suction pipe; 6062. Bucket cover; 6063. Ball valve; 6064. Movable shaft; 6065 , support spring; 6066, mesh panel; 7, second protective assembly; 701, first rubber membrane; 702, first booster; 7021, booster plate; 7022, telescopic rod; 7023, telescopic sleeve; 703, second booster; 704, second rubber membrane; 705, booster drive; 7051, slide rail; 7052, track seat; 7053, slide rod; 7054, side support plate; 7055, track groove; 706, nano sand; 8, drive assembly; 801, threaded rod; 802, driven gear; 803, drive shaft; 804, toothed belt; 805, driving gear; 806, cover; 9, drive groove. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making any creative efforts shall fall within the scope of protection of the present invention.

[0040] Please see the attached Figure 1 -Attached Figure 9The present invention provides a technical solution: a relay contact protection structure, comprising a relay body 1, a wiring slot 2 reserved on the relay body 1, a disassembly slot 3 corresponding to the wiring slot 2, a wiring bolt 4 rotatably connected in the disassembly slot 3, a wiring assembly 5 embedded in the wiring slot 2, a plurality of upper wiring grids 502 of the wiring assembly 5 and a plurality of tilted lower wiring grids 5041 are combined to form an arc extinguishing grid;

[0041] A first protective component 6 is connected to the corresponding wiring slot 2 on the relay body 1. After the external wire passes through the first wiring hole 603 and the second wiring hole 605 of the first protective component 6 in sequence and is connected to the wiring slot 2, the protective box 602 of the first protective component 6 forms a space of its own, and the first protective component 6 has a built-in second protective component 7. The two booster plates 7021 of the second protective component 7 are close to each other to support the external wire and suck the air in the wiring slot 2.

[0042] Specifically, the wiring assembly 5 includes an upper wiring head 501 embedded in the upper inner part of the wiring slot 2, a threaded hole is opened on the upper wiring head 501, and the wiring bolt 4 is threadedly connected to the threaded hole, multiple upper wiring grids 502 are connected to the bottom of the upper wire connector, and multiple upper wiring grids 502 are arranged to be tilted outward. The inner bottom of the wiring slot 2 is connected to a lower wiring head 503, and multiple lower wiring members 504 are connected to the lower wiring head 503. The lower wiring member 504 includes two adapter side plates 5043 connected to the lower wiring head 503, and the same adapter shaft 5042 is rotatably connected between the two adapter side plates 5043. The lower wiring grid 5041 is sleeved on the adapter shaft 5042, and two adapter springs 5044 are sleeved on the adapter shaft 5042. The adapter shaft 5042 is elastically connected to the two adapter side plates 5043 respectively through the two adapter springs 5044.

[0043] The specific implementation method is as follows: when the relay body 1 is connected to the external wire, the end of the external wire is inserted into the first wiring hole 603, the external wire is pushed so that it passes through the second wiring hole 605, and the external wire is pushed further. After the end of the external wire enters the wiring slot 2, it will directly enter between the upper wiring grid 502 and the lower wiring grid 5041. Since the upper wiring grid 502 is in a fixed state, when the lower wiring grid 5041 receives the push from the external wire, the lower wiring grid 5041 rotates on the inner side of the adapter side plate 5043 through the adapter shaft 5042, and twists the adapter spring 5044 to cause it to undergo elastic deformation, and multiple lower wiring grids 5041 tilt deep into the inner side of the wiring slot 2. The lower wiring grids 5041 are inclined, and the inclined lower wiring grids 5041 are parallel to the upper wiring grids 502. If the inclination angle of the lower wiring grids 5041 is too large or too small, it means that the external wires are too thick or too thin. By twisting the wiring bolts 4 to adjust the rotation in the threaded hole, the spacing between the upper wiring grids 502 and the lower wiring grids 5041 is adjusted until the lower wiring grids 5041 are parallel to the upper wiring grids 502, and the electrical connection installation of the external wires is completed. Then, the protective box 602 is installed on the relay body 1 using screws and bolts. The protective box 602 is installed in a rear-mounted manner to facilitate observation of the inclination angles of the lower wiring grids 5041.

[0044] Specifically, the first protection component 6 includes a protection box 602 connected to the relay body 1 by bolts, a sealing gasket 601 is connected between the protection box 602 and the relay body 1, a first wiring hole 603 is corresponding to the wiring slot 2 and is opened on the side end surface of the protection box 602, a protection plate 604 is set in the port of the protection box 602, a second wiring hole 605 is corresponding to the first wiring hole 603 and is opened on the protection plate 604, a one-way shut-off piece 606 is clamped at the corner of the side end surface of the protection plate 604, and the one-way shut-off piece 606 includes a one-way shut-off piece 606 clamped on the protection plate 604. The suction pipe 6061 is located at the corner of the side end face of the guard plate 604, and a bucket-shaped cover 6062 is installed in the port of the suction pipe 6061, and a ball valve 6063 is installed in the bucket-shaped cover 6062. The side end face of the ball valve 6063 is connected to a movable shaft 6064, and the other end of the movable shaft 6064 is connected to a mesh panel 6066. The mesh panel 6066 is installed in the suction pipe 6061, and a support spring 6065 is installed on the movable shaft 6064. The ball valve 6063 is elastically supported and connected to the mesh panel 6066 through the support spring 6065.

[0045] The specific implementation method is as follows: when the two booster plates 7021 approach each other, the pressure on the two sides of the protective box 602 corresponding to the booster plates 7021 moving away from each other decreases. Under the action of the low pressure, the ball valve 6063 moves in the direction away from the bucket cover 6062, and the ball valve 6063 pushes the movable shaft 6064 to slide in the mesh panel 6066, squeezing the support spring 6065 to cause it to elastically deform. The air in the terminal slot 2 is sucked into the protective box 602 through the suction pipe 6061. When the two booster plates 7021 stop moving, the support spring 6065 begins to perform elastic reset movement, and the support spring 6065 pushes the ball valve 6063 to rush into the bucket cover 6062, forming a blocking effect, preventing the air sucked into the protective box 602 from flowing back, and forming a vacuum state at the terminal slot 2 of the relay body 1. The relay works with vacuum as the arc extinguishing medium. In a vacuum, the gas is very thin, and the free travel of electrons is much greater than the distance between the contacts, thereby ensuring the rapid extinction of the arc.

[0046] Specifically, the second protective assembly 7 includes a first rubber membrane 701 and a second rubber membrane 704 that are sealed and connected to the protective box 602. The first rubber membrane 701 and the second rubber membrane 704 are respectively located on the upper and lower sides of the first wiring hole 603. The protective box 602 is sleeved with a first booster 702 and a second booster 703 located on both sides of the first rubber membrane 701 and the second rubber membrane 704. The first booster 702 and the second booster 703 have the same structure. The first booster 702 includes a booster plate 7021 sleeved in the protective box 602. Nanoparticles are filled between the booster plate 7021 and the first rubber membrane 701. Misha 706, the boost plate 7021 is connected to a plurality of telescopic rods 7022 on the side facing away from the first rubber membrane 701. The other ends of the plurality of telescopic rods 7022 are each sleeved with a telescopic sleeve 7023. The other ends of the plurality of telescopic sleeves 7023 are connected to the inner bottom of the protective box 602. The second protective assembly 7 also includes two boost drive members 705 for driving the first boost member 702 and the second boost member 703 toward each other. The boost drive member 705 includes a slide rail 7051 connected to the inner bottom of the protective box 602. The slide rail 7051 is slidably sleeved with a track seat 7052, and the track seat 7052 is connected to a slide rod 7053.

[0047] The two sides of the bottom of the boost plate 7021 are connected to the side support plates 7054, and the opposite surfaces of the two side support plates 7054 are provided with track grooves 7055. The two ends of the slide rod 7053 are respectively slidably connected to the two track grooves 7055. The side end surface of the protective box 602 is provided with a drive groove 9 corresponding to the two boost drive members 705. The drive groove 9 is equipped with a drive assembly 8 for providing power to the two boost drive members 705. The drive assembly 8 includes a drive assembly 8 that is rotatably connected to the inner end surface of the drive groove 9. The threaded rod 801 is threadedly connected to a threaded barrel, which is connected to the slide rail 7051 seat. The corresponding drive grooves 9 on the two screw rods are each equipped with a driven gear 802. The two corresponding driven gears 802 in the drive groove 9 are rotatably connected to a drive shaft 803. The drive shaft 803 is equipped with a driving gear 805. The driving gear 805 and the two driven gears 802 are transmission-connected by a toothed belt 804. The side end face of the drive groove 9 is sealed with a cover 806.

[0048] The specific implementation method is as follows: after the external wire is connected to the wiring slot 2, the protective box 602 is first installed on the relay body 1, and then the driving shaft 803 is twisted with a tool to drive the driving gear 805 to rotate. The driving gear 805 simultaneously drives the two driven gears 802 through the tooth belt 804. The driven gear 802 drives the threaded rod 801 to rotate in the threaded cylinder, and the threaded cylinder drives the track seat 7052 to slide on the slide rail 7051. Since the height of the sliding rod 7053 on the track seat 7052 remains unchanged, the track seat 7052 drives the sliding rod 7053 to slide in the track groove 7055 on the side support plate 7054. During this process, the two booster plates 7021 approach each other, and the first The rubber membrane 701 and the second rubber membrane 704 are deformed under the action of pressure and wrapped around the external wire. Since the two booster plates 7021 are filled with nano sand 706 between the first rubber membrane 701 and the second rubber membrane 704, the nano sand 706 has a certain fluidity. Under the action of the pressure of the booster plate 7021, the nano sand 706 squeezes the first rubber membrane 701 and the second rubber membrane 704 tightly wrapped around the external wire, forming a good sealing effect, preventing external moisture and dust from entering the wiring slot 2, thereby providing good protection for the wiring contacts of the relay body 1, and at the same time further reinforcing the external wire to prevent the external wire from falling off.

[0049] Working principle, when using:

[0050] When the relay body 1 is connected to an external wire, the end of the external wire is inserted into the first wiring hole 603, and the external wire is pushed through the second wiring hole 605. The external wire is pushed further, and the end of the external wire enters the wiring slot 2 and directly enters between the upper wiring grid 502 and the lower wiring grid 5041. Since the upper wiring grid 502 is in a fixed state, when the lower wiring grid 5041 receives the push from the external wire, the lower wiring grid 5041 rotates on the inner side of the adapter side plate 5043 through the adapter shaft 5042, and twists the adapter spring. The spring 5044 causes elastic deformation, and the multiple lower wiring grids 5041 tilt toward the inner side of the wiring slot 2. After tilting, the multiple lower wiring grids 5041 are parallel to the multiple upper wiring grids 502. If the tilt angle of the lower wiring grids 5041 is too large or too small, it means that the external wires are too thick or too thin. By twisting the wiring bolts 4 to adjust the rotation in the threaded holes, the spacing between the multiple upper wiring grids 502 and the multiple lower wiring grids 5041 is adjusted until the multiple lower wiring grids 5041 are parallel to the multiple upper wiring grids 502.

[0051] Use a tool to twist the drive shaft 803 to drive the active gear 805 to rotate, and the active gear 805 simultaneously drives the two driven gears 802 through the toothed belt 804, and the driven gear 802 drives the threaded rod 801 to rotate in the threaded cylinder, and the threaded cylinder drives the track seat 7052 to slide on the slide rail 7051. Since the height of the sliding rod 7053 on the track seat 7052 remains unchanged, the track seat 7052 drives the sliding rod 7053 to slide in the track groove 7055 on the side support plate 7054. During this process, the two booster plates 7021 approach each other, and the first rubber membrane 701 and the second rubber membrane 704 are deformed under the action of pressure and wrapped around the external wire. Since the two booster plates 7021 are filled with nano sand 706 between the first rubber membrane 701 and the second rubber membrane 704, the nano sand 706 has a certain fluidity. Under the action of the pressure of the booster plates 7021, the nano sand 706 squeezes the first rubber membrane 701 and the second rubber membrane 704 and tightly wraps around the external wire;

[0052] As the two booster plates 7021 approach each other, the pressure on both sides of the protective box 602 corresponding to the booster plates 7021 moving away from each other decreases. Under the action of low pressure, the spherical valve 6063 moves in the direction away from the bucket cover 6062. The spherical valve 6063 pushes the movable shaft 6064 to slide in the mesh panel 6066 and squeezes the support spring 6065 to cause it to undergo elastic deformation. The air in the wiring slot 2 is sucked into the protective box 602 through the suction pipe 6061. When the two booster plates 7021 stop moving, the support spring 6065 starts to perform elastic reset movement, and the support spring 6065 pushes the spherical valve 6063 to rush into the bucket cover 6062.

[0053] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A relay contact protection structure, comprising a relay body (1), wherein a wiring slot (2) is reserved on the relay body (1), a disassembly slot (3) is provided on the relay body (1) corresponding to the wiring slot (2), and a wiring bolt (4) is rotatably connected in the disassembly slot (3), characterized in that: A wiring assembly (5) is embedded in the wiring slot (2), and a plurality of upper wiring grids (502) of the wiring assembly (5) and a plurality of tilted lower wiring grids (5041) are combined to form an arc extinguishing grid; The relay body (1) is connected to the corresponding wiring slot (2) with a first protective component (6), and after the external wire passes through the first wiring hole (603) and the second wiring hole (605) of the first protective component (6) in sequence and is connected to the wiring slot (2), the protective box (602) of the first protective component (6) forms a space of its own, the first protective component (6) houses the second protective component (7), and the two booster plates (7021) of the second protective component (7) are close to each other to support the external wire and to suck the air in the wiring slot (2); The first protection component (6) includes a protection box (602) connected to the relay body (1) by bolts, a sealing gasket (601) is connected between the protection box (602) and the relay body (1), the first wiring hole (603) is corresponding to the wiring slot (2) and is opened on the side end surface of the protection box (602), a protection plate (604) is installed in the port of the protection box (602), the second wiring hole (605) is corresponding to the first wiring hole (603) and is opened on the protection plate (604), and a one-way shut-off piece (606) is clamped at the corner of the side end surface of the protection plate (604); The second protective assembly (7) includes a first rubber membrane (701) and a second rubber membrane (704) which are sealed and connected to the protective box (602). The first rubber membrane (701) and the second rubber membrane (704) are respectively located on the upper and lower sides of the first wiring hole (603). The protective box (602) is sleeved with a first booster (702) and a second booster (703) located on both sides of the first rubber membrane (701) and the second rubber membrane (704). The first booster (702) and the second booster (703) The structure is the same as that of the first booster (702), wherein the first booster (702) comprises a booster plate (7021) sleeved in the protective box (602), nano sand (706) is filled between the booster plate (7021) and the first rubber membrane (701), a surface of the booster plate (7021) facing away from the first rubber membrane (701) is connected to a plurality of telescopic rods (7022), the other ends of the plurality of telescopic rods (7022) are sleeved with telescopic sleeves (7023), and the other ends of the plurality of telescopic sleeves (7023) are connected to the inner bottom of the protective box (602); The second protection assembly (7) further includes two boost driving members (705) for driving the first boost member (702) and the second boost member (703) toward each other, the boost driving member (705) including a slide rail (7051) connected to the inner bottom of the protection box (602), a track seat (7052) being slidably sleeved on the slide rail (7051), and a slide rod (7053) being connected to the track seat (7052); Both sides of the bottom of the boost plate (7021) are connected to side support plates (7054), and the opposite surfaces of the two side support plates (7054) are provided with track grooves (7055), and the two ends of the sliding rod (7053) are respectively slidably connected to the two track grooves (7055).

2. A relay contact protection structure according to claim 1, characterized in that: The wiring assembly (5) comprises an upper wiring head (501) embedded in the upper inner portion of the wiring slot (2), a threaded hole being provided on the upper wiring head (501), the wiring bolt (4) being threadedly connected in the threaded hole, a plurality of upper wiring grids (502) being connected to the bottom of the upper wiring head, the plurality of upper wiring grids (502) being arranged outwardly and tilted, a lower wiring head (503) being connected to the inner bottom of the wiring slot (2), and a plurality of lower wiring members (504) being connected to the lower wiring head (503).

3. A relay contact protection structure according to claim 2, characterized in that: The lower connecting member (504) comprises two transfer side plates (5043) connected to the lower connecting head (503); the two transfer side plates (5043) are rotatably connected to a common transfer shaft (5042); the lower connecting grid plate (5041) is sleeved on the transfer shaft (5042); two transfer springs (5044) are sleeved on the transfer shaft (5042); the transfer shaft (5042) is elastically transferred to the two transfer side plates (5043) respectively via the two transfer springs (5044).

4. A relay contact protection structure according to claim 1, characterized in that: The one-way shut-off member (606) comprises a suction pipe (6061) clamped at the corner of the side end face of the protective plate (604); a bucket-shaped cover (6062) is sleeved in the port of the suction pipe (6061); a ball valve (6063) is sleeved in the bucket-shaped cover (6062); a movable shaft (6064) is connected to the side end face of the ball valve (6063); the other end of the movable shaft (6064) is sleeved with a mesh panel (6066); the mesh panel (6066) is sleeved in the suction pipe (6061); a support spring (6065) is sleeved on the movable shaft (6064); and the ball valve (6063) is elastically supported and connected to the mesh panel (6066) via the support spring (6065).

5. The relay contact protection structure according to claim 1, characterized in that: The side end face of the protective box (602) is provided with a driving groove (9) corresponding to the two boosting driving members (705), and the driving groove (9) is equipped with a driving assembly (8) for providing power to the two boosting driving members (705), and the driving assembly (8) includes a threaded rod (801) rotatably connected to the inner end face of the driving groove (9), a threaded barrel is threadedly connected to the threaded rod (801), and the threaded barrel is connected to the slide rail (7051) seat, and driven gears (802) are respectively installed in the corresponding driving grooves (9) on the two screw rods, and a driving shaft (803) is rotatably connected to the two driven gears (802) in the driving groove (9), and a driving gear (805) is installed on the driving shaft (803), and a toothed belt (804) is connected between the driving gear (805) and the two driven gears (802). The side end face of the driving groove (9) is sealed with a cover (806).

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