CN112688268B - Flame-retardant explosion-proof device for intermediate joint - Google Patents
Flame-retardant explosion-proof device for intermediate joint Download PDFInfo
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- CN112688268B CN112688268B CN202011518161.1A CN202011518161A CN112688268B CN 112688268 B CN112688268 B CN 112688268B CN 202011518161 A CN202011518161 A CN 202011518161A CN 112688268 B CN112688268 B CN 112688268B
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Abstract
The invention provides an intermediate joint flame-retardant explosion-proof device which comprises a box body, wherein an installation cavity is formed in the box body, an isolation layer is formed in the installation cavity and is surrounded by four mutually-separable enclosing plates, the isolation layer is used for dividing the installation cavity into a first cavity and a second cavity, a first gear is arranged on the side wall of the installation cavity and corresponds to two sides of each enclosing plate, and racks meshed with the first gears are respectively arranged on two sides of the enclosing plates; mounting plates are arranged in the second cavity corresponding to the position of each coaming; the mutually-facing ends of each mounting plate and each enclosing plate are respectively provided with an electromagnetic unit which generates repulsive magnetism, the electromagnetic units are electrically connected with a power supply, a connecting circuit of the electromagnetic units and the power supply is provided with a first travel switch, and the first travel switch is arranged on the side wall of the second cavity. The invention generates homopolar magnetic field by electrifying the two electromagnetic units which repel each other, thereby enabling the coaming and the mounting plate to repel each other, offsetting most of the impact force of explosion and enabling the box body not to be easily damaged.
Description
Technical Field
The invention relates to the field of electrical safety, in particular to a flame-retardant explosion-proof device of an intermediate joint.
Background
With the improvement of the development level of urban construction, the cable line is more and more applied to medium and low voltage power supply networks due to the excellent characteristics of reliable power supply, hidden laying and the like. When the power supply distance of the cable is long, the cable joint is commonly used for line connection. But the intermediate joint of the cable is easy to break down under the influence of factors such as construction process, operation environment and the like. 90% of cable failures are mid-joint failures. When the cable middle joint is exploded when in fault, strong heat and impact force can be generated, adjacent cables can be burnt out frequently or potential safety hazards can be caused to the surrounding environment, secondary faults can be caused, and larger loss can be caused; the existing explosion-proof device for the cable intermediate joint needs to be improved in the aspects of overall protection strength maintenance and safety performance, and cannot meet the use requirement.
Disclosure of Invention
The invention aims to solve at least one of the technical problems in the related technology to a certain extent, and therefore the invention provides an intermediate joint flame-retardant explosion-proof device, which is characterized in that racks are arranged on two sides of each enclosing plate, when explosion is generated at a cable intermediate joint, each enclosing plate moves upwards relative to a gear under the action of impact force, and two electromagnetic units which repel each other magnetically are electrified to generate homopolar magnetic fields by triggering a first contact switch, so that the enclosing plates and a mounting plate repel each other, most of the impact force generated by the explosion is offset, a box body is not easy to damage, and the overall protection strength maintenance and safety performance are improved.
The technical scheme of the invention is realized as follows:
an intermediate joint flame-retardant explosion-proof device comprises a box body, wherein a mounting cavity is arranged in the box body, an isolation layer which is formed by four mutually separable surrounding plates is arranged in the mounting cavity, the isolation layer is used for dividing the mounting cavity into a first cavity and a second cavity, the first cavity is used for accommodating a cable intermediate joint, a first gear is arranged on the side wall of the mounting cavity corresponding to two sides of each surrounding plate, and racks which are meshed with the first gears are respectively arranged on two sides of each surrounding plate; each first gear is meshed with a semicircular gear, an arc-shaped groove is formed in one side, away from the gear teeth of the semicircular gear, of the semicircular gear on the box body, and the rotation center of the arc-shaped groove and the rotation center of the semicircular gear are located at the same position; a first spring is arranged in the arc-shaped groove, and one end of the first spring is connected to the side wall of the semicircular gear, which is far away from the gear teeth of the semicircular gear; mounting plates are arranged in the second cavity corresponding to the position of each enclosing plate, and the four mounting plates are used for dividing the second cavity into a third cavity and a fourth cavity; an electromagnetic unit which generates repulsive magnetism is arranged at one end, facing each other, of each mounting plate and each surrounding plate, the electromagnetic unit is electrically connected with a power supply, a first travel switch is arranged on a circuit for connecting the electromagnetic unit and the power supply, and the first travel switch is arranged on the side wall of the third cavity; and a fireproof material spraying assembly is arranged in the fourth cavity, a driver of the fireproof material spraying assembly is electrically connected with a second travel switch, and the second travel switch is arranged on one side, facing the mounting plate, of the first travel switch.
Furthermore, the fireproof material spraying assembly comprises a storage tank for placing fireproof materials, the storage tank is communicated with a spraying head through a telescopic hose, and the spraying head is driven by an electric telescopic rod to move along the length direction of the mounting plate; and the driver of the material spraying head and the electric telescopic rod are electrically connected with the second travel switch.
Further, the storage tank sets up outside the box body, be provided with the confession on the box body the logical groove that flexible hose passed, flexible hose's surface is provided with the lug, the last second spring that has cup jointed of flexible hose, the one end of second spring connect in the lateral wall that leads to the groove, the other end of second spring connect in the lug.
Further, be located upside and downside the bounding wall deviates from to correspond the both sides of the one end of mounting panel are protruding respectively and are equipped with the picture peg, are located front side and rear side the bounding wall corresponds the position of picture peg be provided with picture peg assorted slot, the slot with the picture peg is pegged graft the cooperation in order to make up four the bounding wall becomes the isolation layer.
Furthermore, an anti-slip layer for increasing friction force is arranged on the side wall of the inserting plate.
Further, each one end that the bounding wall deviates from the mounting panel all is provided with fire-retardant layer.
Furthermore, a third spring is arranged between each enclosing plate and the corresponding mounting plate.
Furthermore, the box body is at least provided with an energy discharge hole communicated with the third cavity, the energy discharge hole is connected with an energy discharge pipe, and an opening at one end of the energy discharge pipe is sleeved with a sealing plug used for sealing the energy discharge pipe.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the invention, the isolation layer is provided with the four enclosing plates which can be separated from each other, when explosion is generated at the cable middle joint, impact force generated by the explosion pushes the rack of each enclosing plate to rotate relative to the first gear, so that each enclosing plate moves towards the direction close to the corresponding mounting plate, and because friction force exists between the rack and the first gear, the process that the impact force generated by the explosion pushes the enclosing plates to move towards the direction close to the corresponding mounting plates is to overcome the friction force between the rack and the first gear to do work, so that a part of impact force generated by the explosion is offset in the process that the enclosing plates move towards the direction close to the corresponding mounting plates, so that the impact force applied to the box body is reduced, the box body is not easy to damage, and the overall protection strength maintenance and safety performance are improved.
(2) The invention is characterized in that the mutually-oriented ends of each mounting plate and each enclosing plate are respectively provided with electromagnetic units (namely two groups of electromagnets) with repelling magnetism; when the coaming moves to the position for triggering the first travel switch, the electromagnetic unit is electrified to generate a homopolar magnetic field, so that mutually repulsive magnetic field force is generated between the coaming and the corresponding mounting plate, namely, a magnetic field force for preventing the coaming from being close to the mounting plate is generated, and the magnetic field force is gradually increased along with the continuous reduction of the distance between the coaming and the corresponding mounting plate; thereby make the impact force that the explosion produced promote the bounding wall and remove and need overcome magnetic field force and do work towards the direction that is close to the mounting panel for the bounding wall removes the impact force that the in-process offsets partial explosion production towards the direction that is close to the mounting panel that corresponds, and then further reduces the impact force of exerting on the box body, makes the box body more difficult quilt destroy, improves whole protective strength and maintains and the security performance.
(3) The invention also arranges an arc groove on one side of the box body which is positioned at the semicircular gear and is far away from the gear teeth of the semicircular gear, and the rotation center of the arc groove and the rotation center of the semicircular gear are positioned at the same position, therefore, in the process that the enclosing plate moves towards the direction close to the mounting plate, the first gear drives the semicircular gear to rotate, so that the semicircular gear compresses the first spring to deform and gradually contract to the arc groove, because the first spring is compressed to generate an elastic restoring force opposite to the rotation direction of the semicircular gear, and the elastic restoring force of the first spring is larger along with the continuous reduction of the distance between the enclosing plate and the corresponding mounting plate, thereby the impact force generated by partial explosion is offset in the process that the enclosing plate moves towards the direction close to the corresponding mounting plate, and the offset impact force is larger along with the continuous approach of the enclosing plate to the corresponding mounting plate, and then further reduce the impact force of exerting on the box body for the box body is more difficult to be destroyed, improves whole protection intensity and maintains and the security performance.
(4) According to the invention, the fireproof material spraying assembly is arranged in the fourth cavity, and when the enclosing plate moves to the position for triggering the second travel switch, the fireproof material spraying assembly sprays fireproof material to the end face, facing the fourth cavity, of the mounting plate to form the fireproof layer, so that the flame spreading is isolated, and the fire is prevented from spreading to the outside of the box body to burn the rest parts of the cable under the condition that the enclosing plate and the mounting plate are damaged by impact force generated by explosion.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic front view of a first embodiment of the present invention;
FIG. 2 is an enlarged schematic view at A in FIG. 1;
FIG. 3 is an enlarged schematic view at B of FIG. 1;
FIG. 4 is an assembled exploded view of an isolation layer according to an embodiment of the present invention;
fig. 5 is a schematic front view of a second embodiment of the present invention.
Reference numerals:
100 boxes, 110 first cavity, 120 second cavity, 121 third cavity, 122 fourth cavity, 130 arc-shaped grooves, 140 first springs and 150 bumps;
200 insulating layers, 210 enclosing plates, 211 inserting plates, 212 inserting grooves, 213 anti-skid layers and 220 flame-retardant layers;
310 first gear, 320 rack, 330 semi-circular gear;
410 a material storage tank, 420 telescopic hoses, 430 a material spraying head, 440 electric telescopic rods, 450 bumps and 460 second springs;
510 a energy discharge pipe, 520 a sealing plug;
600 cable, 610 cable intermediate joint;
710 mounting plate, 720 electromagnetic unit, 730 first travel switch, 740 second travel switch, 750 third spring.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to the orientation description, such as "upper", "lower", "front", "rear", "left", "right", etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplicity of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, if there is any description of "first", "second", etc. for the purpose of distinguishing technical features, it is not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Example one
Referring to fig. 1 to 3, an intermediate joint flame-retardant explosion-proof device according to an embodiment of the present invention includes a box body 100, a mounting cavity is disposed in the box body 100, an isolation layer 200 surrounded by four separated surrounding plates 210 is disposed in the mounting cavity, the isolation layer 200 is configured to divide the mounting cavity into a first cavity 110 and a second cavity 120, the first cavity 110 is configured to accommodate a cable intermediate joint 610, two sides of the side wall of the mounting cavity corresponding to each surrounding plate 210 are respectively provided with a first gear 310, and two sides of each surrounding plate 210 are respectively provided with a rack 320 engaged with the first gear 310; each first gear 310 is engaged with a semi-circular gear 330, an arc-shaped slot 130 is arranged on one side of the box 100, which is away from the gear teeth of the semi-circular gear 330, and the rotation center of the arc-shaped slot 130 and the rotation center of the semi-circular gear 330 are located at the same position; a first spring 140 is arranged in the arc-shaped groove 130, and one end of the first spring 140 is connected to the side wall of the semicircular gear 330, which is away from the gear teeth of the semicircular gear 330; mounting plates 710 are arranged in the second cavity 120 at positions corresponding to the enclosing plates 210, and the four mounting plates 710 are used for dividing the second cavity 120 into a third cavity 121 and a fourth cavity 122; the mutually facing ends of each mounting plate 710 and each enclosing plate 210 are respectively provided with an electromagnetic unit 720 generating repelling magnetism, the electromagnetic unit 720 is electrically connected with a power supply, a first travel switch 730 is arranged on a circuit connecting the electromagnetic unit 720 and the power supply, and the first travel switch 730 is arranged on the side wall of the third cavity 121; a fire-spraying material assembly is arranged in the fourth cavity 122, a driver of the fire-spraying material assembly is electrically connected with a second travel switch 740, and the second travel switch 740 is arranged on one side, facing the mounting plate 710, of the first travel switch 730.
Compared with the prior art, the embodiment of the invention has the advantages that by arranging the isolation layer 200 into four enclosing plates 210 which can be separated from each other, when an explosion occurs at the cable intermediate joint 610, the impact force generated by the explosion pushes the rack 320 of each enclosure 210 to rotate relative to the first gear 310, thereby causing each shroud 210 to move toward proximity with the corresponding mounting plate 710, because of the friction between the rack 320 and the first gear 310, the impact force generated by the explosion pushes the shroud 210 to move toward the corresponding mounting plate 710, and the friction between the rack 320 and the first gear 310 is overcome to do work, thereby canceling a portion of the impact force from the explosion during the movement of the shroud 210 toward the corresponding mounting plate 710, thereby reducing the impact force applied to the cartridge 100, making the cartridge 100 less susceptible to damage, and improving the overall protective strength maintenance and safety performance. Meanwhile, the mutually facing ends of each mounting plate 710 and each enclosing plate 210 are respectively provided with electromagnetic units 720 (namely two groups of electromagnets) with repelling magnetism; when the shroud 210 moves to the position where the first travel switch 730 is triggered, the electromagnetic unit 720 is energized to generate a homopolar magnetic field, so that a mutually repulsive magnetic field force is generated between the shroud 210 and the corresponding mounting plate 710, that is, a magnetic field force which hinders the shroud 210 from approaching the mounting plate 710 is generated, and the magnetic field force gradually increases as the distance between the shroud 210 and the corresponding mounting plate 710 is increasingly close; therefore, the impact force generated by explosion pushes the enclosing plate 210 to move towards the direction close to the mounting plate 710, the magnetic field force is required to be overcome to do work, the impact force generated by partial explosion is offset in the moving process of the enclosing plate 210 towards the direction close to the corresponding mounting plate 710, the impact force applied to the box body 100 is further reduced, the box body 100 is less prone to being damaged, and the overall protection strength maintenance and safety performance are improved. And through the arc-shaped slot 130 is arranged on the box 100 at the side of the semicircular gear 330 away from the gear teeth of the semicircular gear 330, and the rotation center of the arc-shaped slot 130 and the rotation center of the semicircular gear 330 are at the same position, in the process that the enclosing plate 210 moves towards the direction close to the mounting plate 710, the first gear 310 drives the semicircular gear 330 to rotate, so that the semicircular gear 330 compresses the first spring 140, the first spring 140 deforms and gradually contracts to the arc-shaped slot 130, because the first spring 140 generates an elastic restoring force opposite to the rotation direction of the semicircular gear 330 after being compressed, and as the distance between the enclosing plate 210 and the corresponding mounting plate 710 is continuously close, the elastic restoring force of the first spring 140 is larger, so that the impact force generated by partial explosion is offset in the process that the enclosing plate 210 moves towards the direction close to the corresponding mounting plate 710, and as the enclosing plate 210 is continuously close to the corresponding mounting plate 710, the more the offset impact force, the further the impact force applied on the box body 100 is reduced, so that the box body 100 is less prone to be damaged, and the overall protection strength maintenance and safety performance are improved. In the embodiment of the present invention, the fire spraying material assembly is further disposed in the fourth cavity 122, and when the enclosure 210 moves to the position where the second travel switch 740 is triggered, the fire spraying material assembly sprays the fire preventing material to the end surface of the mounting plate 710 facing the fourth cavity 122 to form a fire preventing layer, so as to isolate the spread of fire, and prevent the fire from spreading to the outside of the box body 100 to burn the rest of the cable and cause destructive damage when the enclosure 210 and the mounting plate 710 are damaged by the impact force generated by explosion.
As shown in fig. 1, preferably, the fire-retardant material spraying assembly comprises a storage tank 410 for placing fire-retardant materials, the storage tank 410 is communicated with a material spraying head 430 through an expansion hose 420, and the material spraying head 430 is driven by an electric expansion rod 440 to move left and right along the length direction of a mounting plate 710; the driver of the material spraying head 430 and the electric telescopic rod 440 are both electrically connected with the second travel switch 740. So set up, move to the position that triggers second travel switch 740 under the effect of the impact force that the bounding wall 210 produced at the explosion, there is the potential risk damaged by the impact force this moment bounding wall 210 and mounting panel 710, consequently, spout the driver of stub bar 430 and electric telescopic handle 440 starts, it moves about along the length direction of mounting panel 710 to make to spout stub bar 430 and spout the fire prevention material on the mounting panel 710 towards the one end terminal surface of fourth chamber 122, thereby it forms the flame retardant coating to make the fire prevention material evenly spout at the mounting panel 710 towards the one end terminal surface of fourth chamber 122, the flame retardant coating of evenly arranging can effectual isolation flame spread, avoid under the condition that the impact force that the explosion produced damages bounding wall 210 and mounting panel 710, the intensity of a fire spreads the rest parts that burns out the cable outside box 100 and causes destructive destruction.
As shown in fig. 1 and fig. 3, it is further preferable that the storage tank 410 is disposed outside the box body 100, a through groove 150 for the flexible hose 420 to pass through is disposed on the box body 100, a protrusion 450 is disposed on an outer surface of the flexible hose 420, a second spring 460 is sleeved on the flexible hose 420, one end of the second spring 460 is connected to a side wall of the through groove 150, and the other end of the second spring 460 is connected to the protrusion 450. With such an arrangement, when the electric telescopic rod 440 extends to drive the material spraying head 430 to move rightwards, the projection 450 compresses the second spring 460, so that the telescopic hose 420 moves rightwards along with the material spraying head 430; when the electric telescopic rod 440 drives the material spraying head 430 to move leftwards and reset, the telescopic hose 420 automatically resets under the elastic restoring force of the second spring 460, so that the telescopic hose 420 can move synchronously with the material spraying head 430, and the fireproof material can be sprayed out smoothly.
As shown in fig. 4, preferably, two sides of the end of the enclosing plate 210 located at the upper side and the lower side away from the corresponding mounting plate 710 are respectively provided with an inserting plate 211 in a protruding manner, the positions of the enclosing plates 210 located at the front side and the rear side corresponding to the inserting plate 211 are provided with inserting slots 212 matched with the inserting plates 211, and the inserting slots 212 are in inserting fit with the inserting plates 211 to combine the four enclosing plates 210 into the isolation layer 200. The four enclosing plates 210 are in plug fit connection with the insertion grooves 212 through the insertion plates 211, that is, when explosion occurs at the cable middle joints 610, the enclosing plates 210 are separated from each other by overcoming the friction force between the insertion grooves 212 and the insertion plates 211 under the action of impact force generated by the explosion and move towards the direction close to the corresponding installation plates 710 respectively; in this process, the friction between the insertion groove 212 and the insertion plate 211 can offset a part of the impact force generated by explosion, so as to further reduce the impact force applied to the box body 100, so that the box body 100 is less prone to be damaged, and the overall protection strength maintenance and safety performance are improved.
As shown in fig. 4, it is further preferable that an anti-slip layer 213 for increasing friction force is provided on the sidewall of the insert plate 211. Through the frictional force between the increase of skid resistant course 213 and the lateral wall of slot 212 to make the impact force that produces at the explosion drive each bounding wall 210 in-process of mutual separation can offset more impact forces, thereby further reduce the impact force of exerting on box body 100, make box body 100 be difficult for being destroyed more, and then improve whole protective strength and maintain and the security performance.
Preferably, the end of each shroud 210 facing away from the mounting plate 710 is provided with a flame retardant layer 220. The flame retardant layer 220 serves to retard flame and fire, so that in the event that an explosion does not occur at the cable intermediate joint 610, but a fire occurs, the fire is prevented from spreading outside the box body 100 and causing destructive damage to the rest of the cable.
As shown in fig. 1 and fig. 2, preferably, at least one energy release hole communicated with the third chamber 121 is formed in the case 100, the energy release hole is connected with an energy release pipe 510, and an opening at one end of the energy release pipe 510 is further sleeved with a sealing plug 520 for sealing the energy release pipe 510. With this arrangement, when the enclosing plate 210 moves towards the direction close to the corresponding mounting plate 710 under the impact force generated by explosion to the position where the first cavity 110 is communicated with the energy release hole, the sealing plug 520 is rapidly opened by the impact force generated by explosion, and the pressure in the first cavity 110 and the second cavity 120 is released through the energy release hole and the energy release pipe 510, so as to buffer the explosion impact force.
Example two
Referring to fig. 5, an embodiment of the present invention is different from the first embodiment in that a third spring 750 is provided between each shroud 210 and the corresponding mounting plate 710. The third spring 750 may offset a portion of the explosive impact during the movement of the shroud 210 toward the corresponding mounting plate 710, thereby further reducing the impact applied to the cartridge 100, making the cartridge 100 less susceptible to damage, and further improving the overall protection strength maintenance and safety performance.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The flame-retardant explosion-proof device for the intermediate joint is characterized by comprising a box body, wherein a mounting cavity is arranged in the box body, an isolation layer which is formed by surrounding four mutually separable surrounding plates is arranged in the mounting cavity, the isolation layer is used for dividing the mounting cavity into a first cavity and a second cavity, the first cavity is used for accommodating a cable intermediate joint, a first gear is arranged on the side wall of the mounting cavity and corresponds to two sides of each surrounding plate, and racks which are meshed with the first gears are respectively arranged on two sides of each surrounding plate; each first gear is meshed with a semicircular gear, an arc-shaped groove is formed in one side, away from the gear teeth of the semicircular gear, of the semicircular gear on the box body, and the rotation center of the arc-shaped groove and the rotation center of the semicircular gear are located at the same position; a first spring is arranged in the arc-shaped groove, and one end of the first spring is connected to the side wall of the semicircular gear, which is far away from the gear teeth of the semicircular gear; mounting plates are arranged in the second cavity corresponding to the position of each enclosing plate, and the four mounting plates are used for dividing the second cavity into a third cavity and a fourth cavity; an electromagnetic unit which generates repulsive magnetism is arranged at one end, facing each other, of each mounting plate and each surrounding plate, the electromagnetic unit is electrically connected with a power supply, a first travel switch is arranged on a circuit for connecting the electromagnetic unit and the power supply, and the first travel switch is arranged on the side wall of the third cavity; and a fireproof material spraying assembly is arranged in the fourth cavity, a driver of the fireproof material spraying assembly is electrically connected with a second travel switch, and the second travel switch is arranged on one side, facing the mounting plate, of the first travel switch.
2. The flame-retardant explosion-proof device of an intermediate joint according to claim 1, wherein the fire-retardant material spraying assembly comprises a storage tank for storing fire-retardant materials, the storage tank is communicated with a material spraying head through a flexible hose, and the material spraying head is driven by an electric telescopic rod to move along the length direction of the mounting plate; and the driver of the material spraying head and the electric telescopic rod are electrically connected with the second travel switch.
3. The flame-retardant explosion-proof device of an intermediate joint according to claim 2, wherein the storage tank is disposed outside the box body, a through groove for the flexible hose to pass through is disposed on the box body, a protrusion is disposed on an outer surface of the flexible hose, a second spring is sleeved on the flexible hose, one end of the second spring is connected to a side wall of the through groove, and the other end of the second spring is connected to the protrusion.
4. The flame-retardant explosion-proof device of an intermediate joint as defined in claim 1, wherein the coaming at the upper side and the lower side is provided with an insertion plate protruding from both sides corresponding to one end of the mounting plate, the coaming at the front side and the rear side is provided with a slot matching with the insertion plate at a position corresponding to the insertion plate, and the slot is in insertion fit with the insertion plate to combine the four coamings into the isolation layer.
5. The flame-retardant explosion-proof device for the intermediate joint as claimed in claim 4, wherein the side wall of the insert plate is provided with an anti-slip layer for increasing friction force.
6. The flame-retardant explosion-proof device of an intermediate joint as claimed in claim 1, wherein one end of each coaming facing away from the mounting plate is provided with a flame-retardant layer.
7. The flame-retardant explosion-proof device of an intermediate joint according to claim 1, wherein a third spring is provided between each of the coamings and the corresponding mounting plate.
8. The flame-retardant explosion-proof device of an intermediate joint according to claim 1, wherein the box body is provided with at least one energy release hole communicated with the third cavity, the energy release hole is connected with an energy release pipe, and an opening at one end of the energy release pipe is further sleeved with a sealing plug for sealing the energy release pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011518161.1A CN112688268B (en) | 2020-12-21 | 2020-12-21 | Flame-retardant explosion-proof device for intermediate joint |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011518161.1A CN112688268B (en) | 2020-12-21 | 2020-12-21 | Flame-retardant explosion-proof device for intermediate joint |
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| CN112688268A CN112688268A (en) | 2021-04-20 |
| CN112688268B true CN112688268B (en) | 2022-02-11 |
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| CN114094481B (en) * | 2021-12-02 | 2024-04-19 | 海南电网有限责任公司三亚供电局 | Automatic threading adjusting device for mutual inductor |
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| CN112688268A (en) | 2021-04-20 |
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