Power plant electrical contact connecting device

Abstract

The invention relates to the field of electrical contacts, in particular to a power plant electrical contact connecting device which comprises a shell, a first control valve is mounted in each heat dissipation hole, fire extinguishing assemblies are symmetrically and fixedly mounted on the side wall of the shell, and a winding assembly is slidably mounted on the side wall of one side of the shell. By arranging the fire extinguishing assembly, when the shell is short-circuited, the current in the circuit is sharply attenuated, and the passing current amount of the electromagnet connected in the circuit in parallel is synchronously weakened, so that the magnetic attraction force between the electromagnet and the permanent magnet is weakened, and the permanent magnet is extinguished along with the weakening of the magnetic attraction force between the electromagnet and the permanent magnet; a first spring starts to extend and reset from an initial compression state to push a first piston plate to move downwards, so that the pressure intensity below the first piston plate is increased, and the dry powder extinguishing agent in the storage box is guided into a guide pipe along a wedge-shaped block and is sprayed out through a plurality of nozzles on the side wall of the guide pipe; and the fire between the moving contact and the static contact is extinguished in time.

Description

Technical Field

[0001] The invention relates to the technical field of electrical contacts, in particular to an electrical contact connection device for a power plant. Background Art

[0002] Contact is one of the key components of switchgear. The main performance and life of switchgear depend to a large extent on the quality of contact material. Contact material is usually required to have good conductivity, low contact resistance, high resistance to welding, high resistance to arc erosion and resistance to material transfer. Currently, most contacts are used inside circuit breakers, but circuit short circuits may cause contacts to catch fire, causing fires, and protection is needed.

[0003] For example, the announcement number CN219998064U proposes an electrical contact connection device for a power plant, including a fixed seat and a connection component installed on the surface of the fixed seat; the connection component includes a shell installed on the surface of the fixed seat, a conductive block installed in the shell, a static contact installed in the shell, and a second guide rod installed in the shell and connected to the static contact. By installing the connection component, the utility model can enhance the stability between the moving contact and the static contact during the use of the electrical switch, reduce the generation of electric sparks during use, increase the service life of the static contact, and have a good use effect. In combination with the wiring component, it is convenient for the electrical switch to be wired by dragging the pull block to wrap the wire around the sliding rod and reset it through the second spring, making the wiring of the electrical switch more convenient and quick, and having a good use effect.

[0004] When the current contacts are in use, if a fire occurs due to a short circuit in the circuit, it is impossible to extinguish the fire immediately. If the electrical accident occurs suddenly and seriously, and the fire is not extinguished in time, it will cause a serious fire. In addition, the existing contacts lack emergency measures. After the contact short circuit catches fire, it is impossible to immediately isolate oxygen and suppress electric sparks, and it is difficult to control the fire inside the shell to prevent the fire from spreading, which poses a safety hazard. Moreover, if the contact catches fire due to a short circuit, if the surrounding personnel do not handle it in time, the flame will burn directly along the cable, causing fire around the outside of the contact, expanding the scope of the fire, and making the fire more serious.

[0005] Therefore, we propose a power plant electrical contact connection device to solve the above-mentioned problems. Summary of the invention

[0006] The purpose of the present invention is to provide an electrical contact connection device for a power plant. By adopting the device to work, the problem that a fire occurs in the contact due to a short circuit in the current circuit and the fire cannot be extinguished immediately in the above-mentioned background, and furthermore, after the contact short circuit catches fire, it is impossible to immediately cut off oxygen and suppress electric sparks, making it difficult to control the fire inside the shell, and after the contact short circuit catches fire, the flame burns out along the cable, causing fire around the outside of the contact, expanding the scope of the fire, and causing the fire to become more serious.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an electrical contact connection device for a power plant, comprising a shell, a moving contact is installed on the top of the shell, a static contact is symmetrically installed on the bottom wall of the shell, each side wall of the static contact is electrically connected to a cable, one end of each cable is sealed and slidably connected to the side wall of the shell, a plurality of heat dissipation holes are opened on the side wall of one side of the shell, a first control valve is installed inside each heat dissipation hole, a fire extinguishing assembly is symmetrically fixedly installed on the side wall of the shell, a protective assembly is symmetrically fixedly installed on the side wall of the shell, the fire extinguishing assembly is located between the protective assemblies, and a winding assembly is slidably installed on the side wall of one side of the shell.

[0008] Furthermore, the fire extinguishing assembly includes two storage boxes, and the two storage boxes are symmetrically fixedly connected to the side walls of the shell, each of the storage boxes is provided with a through hole at the top, and each of the top walls of the storage boxes is fixedly connected to an electromagnet, and the top walls of the storage boxes are symmetrically penetrated by connecting rods that are slidably connected, and one end of the two connecting rods is commonly fixedly connected to a first piston plate, and the first piston plate is sealingly and slidably connected to the storage box and the side walls of the shell, and a permanent magnet is fixedly connected to the top of the first piston plate.

[0009] Furthermore, a first spring is symmetrically fixedly connected to the top wall of the storage box, one end of each of the first springs is fixedly connected to the top of the first piston plate, each of the first springs is sleeved on the outer wall of the adjacent connecting rod, a wedge block is fixedly connected to the bottom wall of the storage box, a guide tube is fixedly connected through the side wall of the shell, a plurality of nozzles are fixedly connected to the side wall of the guide tube, one end of the guide tube is an arc structure, the other end of the guide tube extends to the interior of the storage box and is in contact with the wedge block, a first one-way valve is installed inside the guide tube, and the other ends of the two connecting rods are commonly fixedly connected to a pressure plate.

[0010] Furthermore, the protection component includes two groups of air storage boxes, and the two groups of air storage boxes are symmetrically fixedly connected to the side walls of the shell, each of the air storage boxes is fixedly connected to the top of an airbag, and the top of each airbag is fixedly connected to the bottom of a pressure plate, one side of the airbag is fixedly connected to a first air relief pipe, and a first pressure relief valve is installed inside each of the first air relief pipes, and the side wall of the airbag is fixedly connected to a connecting pipe, one end of the connecting pipe is fixedly connected to the top of an adjacent air storage box, and a second control valve is installed inside the connecting pipe.

[0011] Furthermore, the side wall of the gas storage box is fixedly connected to a second pressure relief pipe, a second pressure relief valve is installed inside the second pressure relief pipe, the inner wall of the gas storage box is sealingly and slidingly connected to a second piston plate, the second piston plate is sealingly and slidingly connected to the adjacent side wall of the shell, and a second spring is symmetrically and fixedly connected to the top of the second piston plate.

[0012] Furthermore, one end of each of the second springs is fixedly connected to the top of the gas storage box, an exhaust pipe is fixedly connected through the side wall of the shell, one end of the exhaust pipe extends to the inside of the shell, and the other end extends to the inside of the gas storage box, and a third control valve is installed inside the exhaust pipe.

[0013] Furthermore, the winding assembly includes two annular grooves, which are symmetrically opened on the side wall of the shell, the side wall of the shell is symmetrically fixedly connected to the limiting block, the side wall of the shell is fixedly connected to a fixing plate, and the top of the fixing plate is fixedly connected to a small electric push rod.

[0014] Furthermore, the movable end of the small electric push rod passes through the fixed plate and is fixedly connected to a movable plate. A sliding groove is opened at the bottom end of the movable plate. A rack plate is symmetrically embedded and slidably connected inside the sliding groove. Each side wall of the rack plate is fixedly connected with a sliding block, and the sliding block is embedded and slides inside the annular groove. One of the side walls of the rack plate is fixedly connected with a third spring.

[0015] Furthermore, one end of the third spring is fixedly connected to the side wall of another rack plate, the side wall of the shell is symmetrically penetrated by a rotating shaft, one end of the rotating shaft is fixedly connected to a driving gear, the driving gear is meshed with an adjacent rack plate, and the inner side wall of the shell is symmetrically rotatably connected to a connecting shaft.

[0016] Furthermore, one end of each connecting shaft is fixedly connected to a friction roller, one end of the friction roller is rotatably connected to the inner wall on the other side of the shell, the cable is located between the two friction rollers and is in contact with each other, one of the connecting shafts is fixedly connected to the rotating shaft, and the side wall of each connecting shaft is fixedly connected to a driven gear, and the two driven gears are meshingly connected.

[0017] Compared with the prior art, the present invention has the following beneficial effects: By setting up a fire extinguishing component, when a short circuit occurs in the shell, a fire will start between the moving contact and the static contact; when the shell is short-circuited, the current in its circuit will decay sharply, at this time the first one-way valve will be opened, and the current passing through the electromagnet connected in parallel in the circuit will be weakened synchronously, so that the magnetic attraction between the electromagnet and the permanent magnet will be weakened. As the magnetic attraction between the electromagnet and the permanent magnet weakens, the first spring begins to extend and reset from the initial compressed state, pushing the first piston plate downward, so that the pressure under the first piston plate increases, so that the dry powder fire extinguishing agent inside the storage box is introduced into the guide tube along the wedge block, and sprayed out through multiple nozzles on the side wall of the guide tube, so as to timely extinguish the fire between the moving contact and the static contact; by setting up a protective component, if the line short circuit is more serious, the resulting fire cannot be extinguished by a dry powder fire extinguisher, and there is still a fire hazard. When the shell is short-circuited, the second control valve in the connecting pipe is opened. As the first spring drives the first piston plate to move downward, the connecting rod drives the pressure plate to move downward synchronously. In this process, the airbag is squeezed downward, so that the air inside the airbag enters the gas storage box along the connecting pipe, so that the pressure above the second piston plate increases, thereby pushing the second piston plate to move downward, and compressing the argon gas stored below the second piston plate. At this time, the third control valve is opened. At this time, the pressure above the second piston plate is much greater than the pressure below the second piston plate, so that the compressed argon gas will enter the shell through the exhaust pipe. As the argon gas continues to enter, the air inside the shell is completely discharged along the heat dissipation holes, so that the shell is completely filled with argon gas. At this time, the first control valve is closed to make the shell closed, so that the shell is oxygen-isolated, thereby suppressing the spread of fire. By setting a winding component, in order to prevent the flame from burning along the cable to the outside and causing a fire around the outside of the shell; start the small electric push rod, and the small electric push rod reciprocates and retracts. When the small electric push rod is extended, it will drive the moving plate to move downward, and the sliders on the side walls of the two rack plates begin to slide along the arc groove of the annular groove. At this time, the third spring begins to contract from the stretched state, driving the two rack plates to approach each other while sliding along the annular groove. At this time, the rack plate is not meshed with the adjacent active gear. When the rack plate moves to the lower limit of the annular groove, the rack plate contacts the limit block, and the rack plate is pushed into the vertical groove of the annular groove through the limit block. At this time, the rack plate is meshed with the active gear, and the small electric push rod starts The upward movement is conducive to the meshing of the rack plate and the driving gear, driving the driving gear and the rotating shaft to rotate, and at this time driving the adjacent driven gears to start synchronous rotation, and utilizing the meshing of the two driven gears, the two friction rollers start to rotate synchronously in opposite directions, wherein the upper friction roller rotates in the reverse direction and the lower friction roller rotates forward, thereby conveying a section of the cable to the inside of the shell during the upward movement of the rack plate in the vertical direction, and when the rack plate moves to the upper limit position of the annular groove, under the action of the third spring, they approach each other again, thereby intermittently winding the cable into the shell to avoid continuous winding, and the flame directly burns all the wound cables, and the purpose of suppressing the flame from burning out along the cable cannot be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall cross-sectional view of the present invention; Figure 2 It is a schematic diagram of the overall structure of the present invention; Figure 3 It is a schematic diagram of the structure in the rearward direction of the present invention; Figure 4 is a cross-sectional view of the housing in the present invention; Figure 5 It is a rear view of the housing in the present invention; Figure 6 It is a schematic diagram of the structure of the fire extinguishing component and the protection component in the present invention; Figure 7 It is a side view of the fire extinguishing assembly and the protection assembly in the present invention; Figure 8 It is a schematic diagram of the structure of the guide tube in the present invention; Fig. 9 It is a structural schematic diagram of the fire extinguishing assembly in the present invention; Fig.10 is a side view of the protection component of the present invention; Fig.11 It is a front view of the protection component in the present invention; Fig.12 It is a structural schematic diagram of the winding assembly in the present invention; Fig.13It is a partial structural schematic diagram of the winding assembly in the present invention.

[0019] In the figure: 1, housing; 11, heat dissipation hole; 12, first control valve; 2, moving contact; 21, static contact; 3, cable; 4, fire extinguishing assembly; 41, storage box; 42, electromagnet; 43, first piston plate; 44, permanent magnet; 45, connecting rod; 46, pressure plate; 47, guide pipe; 48, nozzle; 49, first one-way valve; 410, wedge block; 411, first spring; 412, through hole; 5, protection assembly; 51, air storage box; 52, second piston plate; 53, second spring; 54, air bag; 55, first A vent pipe; 56, a first pressure relief valve; 57, a connecting pipe; 58, a second control valve; 59, a second pressure relief pipe; 510, a second pressure relief valve; 511, an exhaust pipe; 512, a third control valve; 6, a winding assembly; 61, an annular groove; 62, a fixed plate; 63, a small electric push rod; 64, a movable plate; 65, a slide groove; 66, a rack plate; 67, a slider; 68, a limit block; 69, a rotating shaft; 610, a driving gear; 611, a connecting shaft; 612, a driven gear; 613, a friction roller; 614, a third spring. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with specific embodiments.

[0021] In order to solve the technical problem that when the current contacts are in use, a fire occurs due to a short circuit, and the fire cannot be extinguished immediately, if the electrical accident occurs suddenly and seriously, and the fire is not extinguished in time, it will cause a serious fire, such as Figure 1 - Figure 4 and Figure 6 - Fig. 9 As shown, the following preferred technical solutions are provided: An electrical contact connection device for a power plant comprises a housing 1, a moving contact 2 is installed on the top of the housing 1, a static contact 21 is symmetrically installed on the bottom wall of the housing 1, each static contact 21 side wall is electrically connected to a cable 3, one end of each cable 3 is sealed and slidably connected to the side wall of the housing 1, a section of the cable 3 is in a coiled shape, and with the cooperation of a winding assembly 6, the cable 3 is intermittently rolled into the housing 1 to prevent the housing 1 from catching fire due to a short circuit or the like, and the surrounding personnel fail to handle it in time, and the flame directly burns out along the cable 3, causing The fire is more serious. A plurality of heat dissipation holes 11 are provided on the side wall of the shell 1. A first control valve 12 is installed inside each heat dissipation hole 11. When the contact 11 is working, heat is generated to avoid serious situation caused by heat accumulation. The heat is dissipated through the heat dissipation holes 11. A battery is externally connected to the top of the shell 1, and the battery is connected in parallel with the circuit. When the circuit is working normally, the battery charging is controlled by the control module, and the battery is disconnected after being fully charged. The battery is controlled by the control module and is used as the driving force of the small electric push rod 63.

[0022] A fire extinguishing assembly 4 is symmetrically fixedly installed on the side wall of the shell 1. By setting the fire extinguishing assembly 4, when a short circuit occurs in the shell 1, a fire will occur between the moving contact 2 and the static contact 21; when the shell 1 is short-circuited, the current in its circuit will decay sharply, at this time the first one-way valve 49 is opened, and the current passing through the electromagnet 42 connected in parallel in the circuit will be weakened synchronously, so that the magnetic attraction between the electromagnet 42 and the permanent magnet 44 is weakened, and as the magnetic attraction between the electromagnet 42 and the permanent magnet 44 is weakened, the first spring 411 extends and resets from the initial compressed state, pushing the first piston plate 43 downward, so that the pressure below the first piston plate 43 increases, so that the dry powder fire extinguishing agent inside the storage box 41 is introduced into the guide tube 47 along the wedge block 410, and sprayed out through the multiple nozzles 48 on the side wall of the guide tube 47, so as to timely extinguish the fire between the moving contact 2 and the static contact 21.

[0023] The side wall of the shell 1 is symmetrically fixed with a protective assembly 5, and the fire extinguishing assembly 4 is located between the protective assembly 5. By setting the protective assembly 5, if the circuit short circuit is serious, the fire generated cannot be extinguished by a dry powder fire extinguisher, and there is still a fire hazard. At this time, when the shell 1 is short-circuited, the second control valve 58 in the connecting pipe 57 is opened. As the first spring 411 drives the first piston plate 43 to move downward, the connecting rod 45 drives the pressure plate 46 to move downward synchronously. In this process, the airbag 54 is squeezed downward, so that the air inside the airbag 54 enters the air storage box 51 along the connecting pipe 57, so that the second piston plate The pressure above 52 increases, thereby pushing the second piston plate 52 downward, compressing the argon gas stored below the second piston plate 52. At this time, the third control valve 512 is opened. At this time, the pressure above the second piston plate 52 is much greater than the pressure below the second piston plate 52, so that the compressed argon gas will enter the shell 1 through the exhaust pipe 511. As the argon gas continues to enter, the air inside the shell 1 is completely discharged along the heat dissipation hole 11, so that the inside of the shell 1 is completely filled with argon gas. At this time, the first control valve 12 is closed, so that the inside of the shell 1 is in a closed state, and the inside of the shell 1 is in an oxygen-isolated state, thereby suppressing the spread of fire.

[0024] A winding assembly 6 is slidably installed on the side wall of one side of the shell 1. By setting the winding assembly 6, in order to prevent the flame from burning to the outside along the cable 3 and causing a fire around the outside of the shell 1; start the small electric push rod 63, and the small electric push rod 63 reciprocates and extends. When the small electric push rod 63 is extended, it will drive the moving plate 64 to move downward, and the sliders 67 on the side walls of the two rack plates 66 begin to slide along the arc groove of the annular groove 61. At this time, the third spring 614 begins to contract from the stretched state, driving the two rack plates 66 to approach each other in the process of sliding along the annular groove 61. At this time, the rack plate 66 does not mesh with the adjacent driving gear 610. When the rack plate 66 moves to the lower limit of the annular groove 61, the rack plate 66 contacts the limit block 68, and the rack plate 66 is pushed into the vertical groove of the annular groove 61 through the limit block 68. At this time, the rack plate 66 and the driving gear 61 0 meshes, and the small electric push rod 63 starts to move up, which is beneficial to the meshing action of the rack plate 6 and the driving gear 610, driving the driving gear 610 and the rotating shaft 69 to rotate, and at this time drives the adjacent driven gear 612 to start synchronous rotation, and utilizes the meshing action of the two driven gears 612 to make the two friction rollers 613 start to rotate synchronously in the opposite direction, wherein the upper friction roller 613 rotates in the reverse direction, and the lower friction roller 613 rotates forward, so that during the process of the rack plate 66 moving up in the vertical direction, the cable 3 is transported to the inside of the housing 1 for a section, and when the rack plate 66 moves to the upper limit position of the annular groove 61, under the action of the third spring 614, they approach each other again, thereby intermittently rolling the cable 3 into the inside of the housing 1 to avoid continuous rolling, and the flame directly burns all the rolled-in cables 3, and the purpose of suppressing the flame from burning out along the cable 3 cannot be achieved.

[0025] The fire extinguishing assembly 4 includes two storage boxes 41, which are symmetrically fixedly connected to the side walls of the shell 1 on both sides. A through hole 412 is opened at the top of each storage box 41, and an electromagnet 42 is fixedly connected to the inner top wall of each storage box 41. A connecting rod 45 is symmetrically penetrated and slidably connected to the inner top wall of the storage box 41. One end of the two connecting rods 45 is commonly fixedly connected to a first piston plate 43. The first piston plate 43 is sealingly and slidably connected to the storage box 41 and the side wall of the shell 1, and a permanent magnet 44 is fixedly connected to the top of the first piston plate 43.

[0026] The first springs 411 are symmetrically fixedly connected to the inner top wall of the storage box 41, one end of each first spring 411 is fixedly connected to the top of the first piston plate 43, each first spring 411 is sleeved on the outer wall of the adjacent connecting rod 45, and the wedge block 410 is fixedly connected to the inner bottom wall of the storage box 41. A guide tube 47 is fixedly connected to the side wall of the shell 1, and a plurality of nozzles 48 are fixedly connected to the side wall of the guide tube 47. One end of the guide tube 47 is an arc structure, and the other end of the guide tube 47 extends to the inside of the storage box 41 and contacts with the wedge block 410. A first one-way valve 49 is installed inside the guide tube 47, and the other ends of the two connecting rods 45 are commonly fixedly connected to a pressure plate 46.

[0027] In this solution: when the housing 1 is short-circuited, a fire occurs between the moving contact 2 and the static contact 21; after the housing 1 is short-circuited, the current in its circuit will decay sharply, and at this time the first one-way valve 49 is opened, and the current of the electromagnet 42 connected in parallel in the circuit is simultaneously weakened, so that the magnetic attraction between the electromagnet 42 and the permanent magnet 44 is weakened. As the magnetic attraction between the electromagnet 42 and the permanent magnet 44 is weakened, the first spring 411 extends and resets from the initial compressed state, pushing the first piston plate 43 downward, so that the pressure under the first piston plate 43 increases, so that the dry powder fire extinguishing agent inside the storage box 41 is introduced into the guide tube 47 along the wedge block 410, and is sprayed out through the multiple nozzles 48 on the side wall of the guide tube 47, so as to timely extinguish the fire between the moving contact 2 and the static contact 21; The guide tube 47 is an arc-shaped structure and is made of non-flammable material and will not be ignited. The two guide tubes 47 surround the static contact 2 and the moving contact 21 and spray out through multiple nozzles 48, so as to extinguish the fire around the moving contact 2 and the static contact 21, thereby avoiding the existence of dead corners and the inability to extinguish the fire in time. In addition, when the circuit is working normally, the magnetic attraction between the electromagnet 42 and the permanent magnet 44 after power-on is greater than the elastic force of the first spring 411.

[0028] In order to solve the technical problems that the existing contacts lack emergency measures, after the contacts short-circuit and catch fire, it is impossible to immediately cut off oxygen and suppress electric sparks, and it is difficult to control the fire inside the housing 1, which poses a safety hazard, such as Figure 6 - Figure 7 and Fig.10 - Fig.11 As shown, the following preferred technical solutions are provided: The protection component 5 includes two groups of air storage boxes 51, and the two groups of air storage boxes 51 are symmetrically fixedly connected to the side walls of the shell 1. An air bag 54 is fixedly connected to the top of each air storage box 51, and the top of each air bag 54 is fixedly connected to the bottom of the pressure plate 46. One side of the air bag 54 is fixedly connected to a first air release pipe 55, and a first pressure relief valve 56 is installed inside each first air release pipe 55. A connecting pipe 57 is fixedly connected to the side wall of the air bag 54, and one end of the connecting pipe 57 is fixedly connected to the top of the adjacent air storage box 51, and a second control valve 58 is installed inside the connecting pipe 57.

[0029] The side wall of the gas storage box 51 is fixedly connected to a second pressure relief pipe 59, and a second pressure relief valve 510 is installed inside the second pressure relief pipe 59. When the second piston plate 52 needs to be reset, it is only necessary to open the second pressure relief valve 510. At this time, the third control valve 512 is also in an open state. Under the elastic action of the second spring 53, the second piston plate 52 is pulled upward, and the inner wall of the gas storage box 51 is sealingly and slidingly connected to the second piston plate 52. The second piston plate 52 is sealingly and slidingly connected to the adjacent side wall of the shell 1, and the second spring 53 is symmetrically and fixedly connected to the top of the second piston plate 52.

[0030] One end of each second spring 53 is fixedly connected to the top of the air storage box 51, and an exhaust pipe 511 is fixedly connected to the side wall of the shell 1. One end of the exhaust pipe 511 extends to the inside of the shell 1, and the other end extends to the inside of the air storage box 51. A third control valve 512 is installed inside the exhaust pipe 511.

[0031] In this solution: if the circuit short circuit is more serious, the fire generated cannot be extinguished by a dry powder fire extinguisher, and there is still a fire hazard. At this time, when the shell 1 is short-circuited, the second control valve 58 in the connecting pipe 57 is opened. As the first spring 411 drives the first piston plate 43 to move downward, the connecting rod 45 drives the pressure plate 46 to move downward synchronously. During this process, the airbag 54 is squeezed downward, so that the air inside the airbag 54 enters the air storage box 51 along the connecting pipe 57, so that the pressure above the second piston plate 52 increases, thereby pushing the second piston plate 52 to move downward, compressing the argon gas stored below the second piston plate 52, and then opening the third control valve 512. At this time, the pressure above the second piston plate 52 is much greater than that below the second piston plate 52. The pressure is high, so that the compressed argon gas will enter the shell 1 through the exhaust pipe 511. As the argon gas continues to enter, the air inside the shell 1 is completely discharged along the heat dissipation hole 11, so that the shell 1 is completely filled with argon gas. At this time, the first control valve 12 and the second control valve 58 are closed to make the shell 1 closed, so that the shell 1 is in an oxygen-isolated state, thereby suppressing the spread of fire. Argon gas has a good flame retardant effect and can suppress the supply of oxygen during the combustion process, thereby slowing down the spread of flames. By symmetrically arranging four gas storage boxes 51 on the side walls of both sides of the shell 1, the argon gas inside the four gas storage boxes 51 is sufficient to complete the replacement of the air inside the shell 1, so that the shell is filled with argon gas, and the purpose of oxygen isolation and suppressing the spread of flames is achieved. If the fire inside the shell 1 is directly extinguished by the fire extinguishing component 4, the protection component 5 is no longer needed. However, in the process of the first piston plate 43 driving the pressure plate 46 to move downward, in order to prevent the internal gas of the airbag 54 from not completely entering the gas storage box 51, causing the first piston plate 43 to not move down to the limit position, resulting in insufficient use of a sufficient amount of dry powder fire extinguishing agent for fire extinguishing, when the argon gas inside the gas storage box 51 is compressed to the limit, the second control valve 58 is closed and the first pressure relief valve 56 is opened, so that the remaining gas inside the airbag 54 is discharged along the first relief pipe 55, so that the first piston plate 43 moves to the limit position under the elastic action of the first spring 411, so that a sufficient amount of dry powder fire extinguishing agent is used to avoid affecting the fire extinguishing.

[0032] In order to solve the technical problem that if the contact is on fire due to short circuit or other reasons, and the surrounding personnel do not handle it in time, the flame will burn directly along the cable 3, causing the fire around the outside of the contact, expanding the scope of the fire, and causing the fire to become more serious, such as Figure 3 , Figure 5 and Fig.12 - Fig.13 As shown, the following preferred technical solutions are provided: The winding assembly 6 includes two annular grooves 61, which are symmetrically opened on the side wall of the shell 1. The annular grooves 61 are composed of vertical grooves and arc grooves. The side wall of the shell 1 is symmetrically fixedly connected to the limiting block 68. The side wall of the shell 1 is fixedly connected to a fixed plate 62, and a small electric push rod 63 is fixedly connected to the top of the fixed plate 62.

[0033] The movable end of the small electric push rod 63 passes through the fixed plate 62 and is fixedly connected to the movable plate 64. A sliding groove 65 is opened at the bottom end of the movable plate 64. A rack plate 66 is symmetrically embedded and slidably connected inside the sliding groove 65. Each side wall of the rack plate 66 is fixedly connected to a slider 67. The slider 67 is embedded and slides inside the annular groove 61. One of the side walls of the rack plate 66 is fixedly connected to a third spring 614.

[0034] One end of the third spring 614 is fixedly connected to the side wall of another rack plate 66, and a rotating shaft 69 is symmetrically passed through the side wall of the shell 1 and is rotatably connected. One end of the rotating shaft 69 is fixedly connected to a driving gear 610, and the driving gear 610 is meshed with the adjacent rack plate 66. The inner wall of the shell 1 is symmetrically rotatably connected to a connecting shaft 611.

[0035] One end of each connecting shaft 611 is fixedly connected to a friction roller 613, and one end of the friction roller 613 is rotatably connected to the inner wall of the other side of the shell 1. The cable 3 is located between the two friction rollers 613 and is in contact with each other. One of the connecting shafts 611 is fixedly connected to the rotating shaft 69, and the side wall of each connecting shaft 611 is fixedly connected to a driven gear 612, and the two driven gears 612 are meshed and connected.

[0036] In this solution: in order to prevent the flame from burning to the outside along the cable 3 and causing a fire around the outside of the shell 1; the small electric push rod 63 is started, and the small electric push rod 63 reciprocates and retracts. When the small electric push rod 63 is extended, it will drive the movable plate 64 to move downward, and the sliders 67 on the side walls of the two rack plates 66 begin to slide along the arc groove of the annular groove 61. At this time, the third spring 614 begins to shrink from the stretched state, driving the two rack plates 66 to approach each other during the sliding process along the annular groove 61. At this time, the rack plate 66 does not mesh with the adjacent active gear 610. When the rack plate 66 moves to the lower limit of the annular groove 61, the rack plate 66 contacts the limit block 68, and the rack plate 66 is pushed into the vertical groove of the annular groove 61 through the limit block 68. At this time, the rack plate 66 meshes with the active gear 610, and the small electric push rod 63 begins to move upward, which is beneficial to the meshing of the rack plate 6 and the active gear 610, driving the active gear 610 and the rotating shaft 69 The gears 612 are engaged with each other to prevent the two friction rollers 613 from rotating synchronously in the opposite direction, and the upper friction roller 613 rotates in the opposite direction while the lower friction roller 613 rotates in the forward direction. As a result, when the rack plate 66 moves up in the vertical direction, a section of the cable 3 is conveyed to the inside of the housing 1. When the rack plate 66 moves to the upper limit of the annular groove 61, the rack plate 66 approaches each other again under the action of the third spring 614, so as to intermittently roll the cable 3 into the housing 1 to avoid continuous rolling. The flame directly burns all the rolled-in cables 3, and the purpose of suppressing the flame from burning out along the cable 3 cannot be achieved. A section of the cable 3 is in a winding shape. By intermittently rolling the cable 3 into the housing 1, it is prevented that the fire in the housing 1 is caused by a short circuit or the like. If the surrounding personnel fail to handle it in time, the flame directly burns out along the cable 3, causing the fire to become more serious.

[0037] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0038] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. 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 power plant electrical contact connection device, comprising a housing (1), characterized in that: A moving contact (2) is installed on the top of the shell (1), and a stationary contact (21) is symmetrically installed on the bottom wall of the shell (1). Each side wall of the stationary contact (21) is electrically connected to a cable (3), and one end of each cable (3) is sealed and slidably connected to the side wall of the shell (1). A plurality of heat dissipation holes (11) are opened on one side wall of the shell (1), and a first control valve (12) is installed inside each heat dissipation hole (11). A fire extinguishing assembly (4) is symmetrically fixedly installed on the side wall of the shell (1), and a protective assembly (5) is symmetrically fixedly installed on the side wall of the shell (1), and the fire extinguishing assembly (4) is located between the protective assemblies (5). A winding assembly (6) is slidably installed on the side wall of one side of the shell (1).

2. The power plant electrical contact connection device according to claim 1, characterized in that: The fire extinguishing assembly (4) comprises two storage boxes (41), the two storage boxes (41) are symmetrically fixedly connected to the side walls of the housing (1), each storage box (41) is provided with a through hole (412) at the top, each storage box (41) is fixedly connected to an electromagnet (42) at the inner top wall, a connecting rod (45) is symmetrically penetrated and slidably connected to the inner top wall of the storage box (41), one end of the two connecting rods (45) is commonly fixedly connected to a first piston plate (43), the first piston plate (43) is sealingly slidably connected to the storage box (41) and the side wall of the housing (1), and the top of the first piston plate (43) is fixedly connected to a permanent magnet (44).

3. The power plant electrical contact connection device according to claim 2, characterized in that: The top wall of the storage box (41) is symmetrically fixedly connected to a first spring (411), one end of each of the first springs (411) is fixedly connected to the top of the first piston plate (43), and each of the first springs (411) is sleeved on the outer wall of an adjacent connecting rod (45). The bottom wall of the storage box (41) is fixedly connected to a wedge block (410). A guide tube (47) is fixedly connected to the side wall of the shell (1), and a plurality of nozzles (48) are fixedly connected to the side wall of the guide tube (47). One end of the guide tube (47) is an arc-shaped structure, and the other end of the guide tube (47) extends into the interior of the storage box (41) and contacts the wedge block (410). A first one-way valve (49) is installed inside the guide tube (47), and the other ends of the two connecting rods (45) are fixedly connected to a pressure plate (46).

4. The power plant electrical contact connection device according to claim 3, characterized in that: The protection assembly (5) comprises two groups of air storage boxes (51), the two groups of air storage boxes (51) are symmetrically fixedly connected to the side walls of the housing (1), the top of each air storage box (51) is fixedly connected to an air bag (54), the top of each air bag (54) is fixedly connected to the bottom of the pressure plate (46), one side of the air bag (54) is fixedly connected to a first air release pipe (55), each first air release pipe (55) is installed with a first pressure relief valve (56), the side wall of the air bag (54) is fixedly connected to a connecting pipe (57), one end of the connecting pipe (57) is fixedly connected to the top of an adjacent air storage box (51), and a second control valve (58) is installed inside the connecting pipe (57).

5. The power plant electrical contact connection device according to claim 4, characterized in that: The side wall of the gas storage box (51) is fixedly connected to a second pressure relief pipe (59), a second pressure relief valve (510) is installed inside the second pressure relief pipe (59), the inner wall of the gas storage box (51) is sealingly slidably connected to a second piston plate (52), the second piston plate (52) is sealingly slidably connected to the adjacent side wall of the shell (1), and a second spring (53) is symmetrically fixedly connected to the top end of the second piston plate (52).

6. The power plant electrical contact connection device according to claim 5, characterized in that: One end of each of the second springs (53) is fixedly connected to the top of the gas storage box (51); an exhaust pipe (511) is fixedly connected to a side wall of the shell (1); one end of the exhaust pipe (511) extends into the interior of the shell (1), and the other end extends into the interior of the gas storage box (51); a third control valve (512) is installed inside the exhaust pipe (511).

7. The power plant electrical contact connection device according to claim 1, characterized in that: The winding assembly (6) comprises two annular grooves (61), the two annular grooves (61) are symmetrically arranged on the side wall of the shell (1), the side wall of the shell (1) is symmetrically fixedly connected to a limit block (68), the side wall of the shell (1) is fixedly connected to a fixing plate (62), and the top end of the fixing plate (62) is fixedly connected to a small electric push rod (63).

8. The power plant electrical contact connection device according to claim 7, characterized in that: The movable end of the small electric push rod (63) passes through the fixed plate (62) and is fixedly connected to the movable plate (64). The bottom end of the movable plate (64) is provided with a slide groove (65). A rack plate (66) is symmetrically embedded and slidably connected inside the slide groove (65). Each side wall of the rack plate (66) is fixedly connected to a slider (67). The slider (67) is embedded and slidably inside the annular groove (61). One of the side walls of the rack plate (66) is fixedly connected to a third spring (614).

9. The power plant electrical contact connection device according to claim 8, characterized in that: One end of the third spring (614) is fixedly connected to the side wall of another rack plate (66); a rotating shaft (69) is symmetrically passed through the side wall of the housing (1) and is rotatably connected; one end of the rotating shaft (69) is fixedly connected to a driving gear (610); the driving gear (610) is meshingly connected to an adjacent rack plate (66); and a connecting shaft (611) is symmetrically rotatably connected to the inner side wall of the housing (1).

10. The power plant electrical contact connection device according to claim 9, characterized in that: One end of each of the connecting shafts (611) is fixedly connected to a friction roller (613), one end of the friction roller (613) is rotatably connected to the inner wall of the other side of the housing (1), the cable (3) is located between the two friction rollers (613) and is in contact with each other, one of the connecting shafts (611) is fixedly connected to the rotating shaft (69), and the side wall of each of the connecting shafts (611) is fixedly connected to a driven gear (612), and the two driven gears (612) are meshingly connected.

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