CN216056277U - Wiring cavity with two incoming line modes for mining dry-type transformer - Google Patents
Wiring cavity with two incoming line modes for mining dry-type transformer Download PDFInfo
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- CN216056277U CN216056277U CN202121622537.3U CN202121622537U CN216056277U CN 216056277 U CN216056277 U CN 216056277U CN 202121622537 U CN202121622537 U CN 202121622537U CN 216056277 U CN216056277 U CN 216056277U
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Abstract
The utility model relates to the field of transformer manufacturing, in particular to a wiring cavity with two wire inlet modes for a mining dry-type transformer, wherein two groups of stuffing boxes are arranged on an explosion-proof wall of the wiring cavity, one group of stuffing boxes comprises a first flange, a first blind plate and a conical barrel, the first flange is fixed on the explosion-proof wall of the wiring cavity, and a flange at one port of the conical barrel is connected with the first flange; the second group of stuffing boxes comprise bell mouths, sealing rings, a second blind plate and a cable lead-in device, the bell mouths are fixed on the explosion-proof wall of the wiring cavity, the sealing rings are nested in the bell mouths, the inner walls of the sealing rings are composed of a layer of thin-wall inner skin, and the cable lead-in device is of a tubular structure and is connected with the bell mouths through flanges. The mining transformer has the advantages that the wiring cavities with two different wire inlet forms can meet the requirements of explosion prevention and sealing of armored cables and rubber sleeve cables in a mine stuffing box, and the mining transformer has the characteristics of low manufacturing cost, high applicability, convenience in mounting and dismounting, safety and reliability.
Description
Technical Field
The utility model relates to the field of transformer manufacturing, in particular to the field of a wiring cavity explosion-proof stuffing box, and specifically relates to a wiring cavity with two incoming line forms for a mining dry-type transformer.
Background
The mining explosion-proof dry-type transformer consists of a high-voltage explosion-proof wiring cavity, a low-voltage explosion-proof wiring cavity and an explosion-proof box body (containing the dry-type transformer), and is suitable for places containing gas and coal dust and having explosion risks under coal mines. The power supply system is characterized in that 10kv or 6kv underground coal mine enters a mine explosion-proof dry-type transformer through a high-voltage explosion-proof switch and a high-voltage cable which are connected with a high-voltage explosion-proof wiring cavity wiring terminal, high voltage is changed into low voltage through the transformer, output voltage is output through the cable which is connected with the low-voltage explosion-proof wiring cavity wiring terminal and enters a low-voltage feed switch to supply power for mine equipment such as a coal mining machine and a belt conveyor, and the power supply system can operate independently and can also operate two units in parallel.
The use of armored or rubber-sheathed cables is chosen according to the environment of the mine and the importance of power supply. No matter which type of cable is used, the binding post must be connected through the stuffing box on the wiring cavity, and the explosion-proof requirement can be met through the stuffing filling of the stuffing box. In the past design, the wiring cavity only has one type of stuffing box, the function of the wiring cavity is single, the application range is small, when cables of different types are replaced, a new stuffing box needs to be replaced, because the new stuffing box cannot achieve the sealing effect, a group of wiring cavities are replaced by new purchase, the investment cost is increased for coal mines, and if a client replaces different cables, the same stuffing is adopted, the explosion-proof safety requirement cannot be met, and potential safety hazards are brought to production. The utility model is applied to the utility model on the basis.
Disclosure of Invention
The utility model aims to provide two wiring cavities with different wire inlet forms for a mining transformer, two types of stuffing boxes can be simultaneously arranged, the explosion-proof function of an armored cable and a rubber sleeve cable is met, important power supply equipment is connected by the armored cable according to the requirements of customers, common power supply equipment is connected by the rubber sleeve cable, the requirements of the customers on use are not tightly met, and the cost for purchasing the cable and the equipment by the customers can be reduced.
The utility model is realized by adopting the following technical scheme: the mining dry-type transformer wiring cavity comprises a wiring cavity body, flange frames are arranged on two sides of the wiring cavity body, the flange frame on one side is connected with a transformer box body flange, the flange frame on the other side is connected with a wiring cavity cover plate, and two groups of packing boxes are arranged on an explosion-proof wall of the wiring cavity body. One group of stuffing boxes comprise a first flange, a first blind plate and a conical barrel, wherein the first flange is fixed on the explosion-proof wall of a wiring cavity, an armored cable hole is formed in the explosion-proof wall of the wiring cavity in the first flange, a flange at one port of the conical barrel is connected with the first flange, the other port of the conical barrel serves as an armored cable lead-in port, a wiring cavity cover plate is opened firstly during wiring, the armored cable is inserted into the wiring cavity from the armored cable lead-in port and is connected with a corresponding wiring terminal, the armored cable is tightly pressed by a pair of U-shaped clamps at the armored cable lead-in port to prevent the armored cable from falling off, epoxy resin liquid is poured into the armored cable hole at the inner side of the wiring cavity, the epoxy resin liquid fills the conical barrel and is solidified into a hard solid, and therefore the resin and the armored cable become a whole, and the armored cable is free of shrinkage, and sealing and explosion resistance are good. The second group of stuffing boxes comprise bell mouths, sealing rings, second blind plates and cable leading-in devices, the bell mouths are fixed on the explosion-proof walls of the wiring cavities, the sealing rings are nested in the bell mouths, the inner walls of the sealing rings are composed of a layer of thin-wall inner skin, the diameter of cable holes of rubber sleeves on the explosion-proof walls of the wiring cavities in the bell mouths is smaller than the outer diameter of the sealing rings, and the cable leading-in devices are of tubular structures and are connected with the bell mouths through flanges; the rubber sleeve cable penetrates through the cable leading-in device during wiring, the cable is clamped by the pair of U-shaped clamps, the cable is prevented from falling off, the rubber sleeve cable penetrates through the sealing ring, the inner wall of the sealing ring is composed of a layer of thin-wall inner skin, the inner skin of the sealing ring can be peeled off to enable the sealing ring to be in interference fit with the rubber sleeve cable according to the diameter of the rubber sleeve cable, the explosion-proof and sealing effects are achieved, and the rubber sleeve cable is connected with the corresponding wiring terminal after being inserted into the wiring cavity.
When the first group of stuffing boxes are used, a second blind plate in the second group of stuffing boxes is arranged between the bell mouth and the flange of the cable lead-in device, so that the sealing and explosion-proof effects are achieved; when the second group of stuffing boxes are used, the first blind plate in the first group of stuffing boxes is arranged between the first flange and the conical barrel flange, and the sealing and explosion-proof effects are achieved.
According to the wiring cavity with the two wire inlet modes of the mining dry-type transformer, the U-shaped clamp is fixed at the other end of the conical barrel, and the armored cable is conveniently matched and fixed with the other U-shaped clamp.
The second group of stuffing boxes also comprises a pressing ring. The clamping ring is in the horn mouth, and in the fastening process is connected to cable entry device and horn mouth, cable entry device top clamping ring, the clamping ring can be even compress tightly the sealing washer, not damaged sealing washer flattens the sealing washer in finite space, can make sealing washer and rubber sleeve cable in close contact with.
The sealing ring of the wiring cavity of the mining dry-type transformer in two wire inlet modes is a butadiene-blue rubber sealing ring.
According to the wiring cavity with the two wire inlet forms for the mining dry-type transformer, the included angle between the explosion-proof wall of the wiring cavity for mounting the stuffing boxes and the horizontal plane is 30 degrees, and the two groups of stuffing boxes are perpendicular to the explosion-proof wall, so that the cable wiring is facilitated.
Compared with the prior art beneficial effect that has:
the utility model provides a wiring chamber of two kinds of different inlet wire forms of mining transformer, is the wiring chamber that can connect armoured cable and rubber sleeve cable simultaneously, and the wiring chamber is supporting goes up two kinds of packing boxes, and one kind is the pouring packing box, makes the armoured cable that the shrink nature is little pour into a whole through the pouring, has characteristics such as explosion-proof, sealed good, epoxy liquid solidification fast. According to the other compression type stuffing box, the two bolts are fastened, the introducing device can rapidly compress the sealing ring, and the sealing ring extrudes the rubber cable in a limited space, so that the assembly gap is tightly sealed, the installation is rapid, and the explosion-proof performance is good. The dual-purpose wiring cavity of the mining dry-type transformer meets the requirements of customers for use, and has the characteristics of low manufacturing cost, convenience in installation and disassembly, good explosion-proof and sealing effects, safety and reliability.
Drawings
Fig. 1 is an exploded view of a wiring cavity in two different incoming line forms.
Fig. 2 is an exploded view of a wiring cavity in two different incoming line forms.
Fig. 3 is an exploded view three of the wiring cavity in two different incoming line forms.
Fig. 4 is an exploded view of two different incoming line types of wiring chambers.
Fig. 5 is an exploded view five of the wiring cavity in two different incoming line forms.
Fig. 6 is a first assembly view of the wiring cavity for two different types of incoming wires.
Fig. 7 is a second assembly view of the wiring cavity for two different types of incoming wires.
Fig. 8 is a third assembly view of the wiring cavity for two different types of incoming wires.
Fig. 9 is a fourth assembly view of the wiring cavity for two different types of incoming wires.
Fig. 10 is a fifth assembly view of the wiring cavity for two different types of incoming wires.
In the figure: 1-a first flange, 2-a first blind plate, 3-a conical barrel, 4-a bell mouth, 5-a sealing ring, 6-a second blind plate, 7-a cable leading-in device, 8-a pressing ring, 9-a U-shaped clamp, 10-a wiring cavity explosion-proof wall, 11-a wiring cavity, 12-a wiring cavity cover plate, 13-an armored cable hole and 14-a rubber sleeve cable hole.
Detailed Description
The utility model relates to two wiring cavities with different wire inlet forms for a mining transformer, wherein each wiring cavity comprises a straight-tube-shaped wiring cavity body 11, the four walls of each wiring cavity body are explosion-proof walls, flange frames are arranged on the two sides of each wiring cavity body, the flange frame on one side is connected with a transformer box body flange, the flange frame on the other side is connected with a wiring cavity cover plate 12, and the included angle between the explosion-proof wall provided with a stuffing box and the horizontal plane is 30 degrees.
The first group of stuffing boxes comprise a first flange 1, a first blind plate 2 and a conical barrel 3, a wiring cavity is installed on a transformer box body, a wiring cavity cover plate 12 is opened, a cable is inserted into the wiring cavity from an inlet of the conical barrel and is connected with a corresponding wiring terminal, an armored cable is compressed by a U-shaped clamp 9 and is prevented from falling off, the conical barrel 3 is perpendicular to an explosion-proof wall 10 of the wiring cavity, the flange of the conical barrel 3 is connected with the first flange 1 through a bolt to form a whole, epoxy resin liquid is poured from an armored cable hole 13 in the inner side of the wiring cavity, the conical barrel 3 is filled with the epoxy resin liquid and is solidified into hard solid, so that the resin and the armored cable become a whole, the armored cable has no shrinkage property, the sealing performance and the explosion resistance are good, and the external acting force can be effectively buffered when the conical barrel 3 is exploded in the wiring cavity. If the pouring type stuffing box (the first group of stuffing boxes) is used for standby, the first blind plate 2 is arranged between the two flanges, and the sealing and explosion-proof effects are achieved.
The second group of stuffing boxes comprises a bell mouth 4, a butadiene-blue rubber sealing ring, a second blind plate 6, a pressing ring 8 and a cable leading-in device 7, the cable is led into the device 7 and passes through a rubber sleeve cable, the U-shaped clamp 9 is used for clamping the cable to prevent the cable from falling off, then the cable passes through the pressing ring 8 and the butadiene rubber sealing ring, the inner wall of the butadiene rubber sealing ring is composed of a layer of thin-wall inner skin, according to the diameter of the rubber sleeve cable, the inner skin of the butadiene rubber sealing ring can be stripped to ensure that the sealing ring is in interference fit with the cable, the butadiene rubber sealing ring is nested in the bell mouth 4, the cable lead-in device is fixedly connected with the bell mouth through two bolts, in the fastening process, the pressing ring 8 can evenly press the nitrile rubber sealing ring without damaging the nitrile rubber sealing ring, the sealing ring is flattened in a limited space, so that the sealing ring can be in close contact with a rubber sleeve cable, and the sealing ring is good in explosion-proof and sealing effects, safe and reliable.
In conclusion, the mining transformer wiring cavity with two different wire inlet forms can meet the requirements of explosion prevention and sealing of armored cables and rubber sleeve cables in a mine stuffing box, and has the characteristics of low manufacturing cost, high applicability, convenience in mounting and dismounting, safety and reliability.
Claims (5)
1. Two kinds of inlet wire forms's of mining dry-type transformer wiring chamber, including wiring cavity (11), the both sides of wiring cavity all are provided with the flange frame, and wherein the flange frame of one side connects transformer box flange, and opposite side flange frame connects wiring chamber apron (12), its characterized in that: two groups of stuffing boxes are arranged on a wiring cavity explosion-proof wall (10) of the wiring cavity, wherein one group of stuffing boxes comprise a first flange (1), a first blind plate (2) and a conical barrel (3), the first flange (1) is fixed on the wiring cavity explosion-proof wall (10), an armored cable hole (13) is formed in the wiring cavity explosion-proof wall in the first flange (1), a flange at one port of the conical barrel is connected with the first flange (1), and the other port of the conical barrel (3) is used as an armored cable lead-in port; the second group of stuffing boxes comprises a bell mouth (4), a sealing ring (5), a second blind plate (6) and a cable leading-in device (7), the bell mouth (4) is fixed on the explosion-proof wall (10) of the wiring cavity, the sealing ring (5) is nested in the bell mouth, the inner wall of the sealing ring (5) is composed of one layer of thin-wall inner skin, the diameter of a rubber sleeve cable hole (14) in the explosion-proof wall of the wiring cavity in the bell mouth (4) is smaller than the outer diameter of the sealing ring, and the cable leading-in device (7) is of a tubular structure and is connected with the bell mouth through a flange.
2. The mining dry-type transformer two-wire-inlet wiring cavity of claim 1, characterized in that: the other end of the cone-shaped barrel is fixed with a U-shaped clamp (9).
3. The mining dry-type transformer two-wire-inlet wiring cavity according to claim 1 or 2, characterized in that: the second group of stuffing boxes also comprises a pressing ring (8).
4. The mining dry-type transformer two-wire-inlet wiring cavity according to claim 1 or 2, characterized in that: the sealing ring (5) is a butadiene-blue rubber sealing ring.
5. The mining dry-type transformer two-wire-inlet wiring cavity according to claim 1 or 2, characterized in that: the included angle between the explosion-proof wall of the wiring cavity for installing the stuffing boxes and the horizontal plane is 30 degrees, and the two groups of stuffing boxes are perpendicular to the explosion-proof wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121622537.3U CN216056277U (en) | 2021-07-16 | 2021-07-16 | Wiring cavity with two incoming line modes for mining dry-type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121622537.3U CN216056277U (en) | 2021-07-16 | 2021-07-16 | Wiring cavity with two incoming line modes for mining dry-type transformer |
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| CN216056277U true CN216056277U (en) | 2022-03-15 |
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| CN202121622537.3U Active CN216056277U (en) | 2021-07-16 | 2021-07-16 | Wiring cavity with two incoming line modes for mining dry-type transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115021175A (en) * | 2022-07-08 | 2022-09-06 | 上海外高桥造船有限公司 | Sealed junction box, bulkhead and ship |
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2021
- 2021-07-16 CN CN202121622537.3U patent/CN216056277U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115021175A (en) * | 2022-07-08 | 2022-09-06 | 上海外高桥造船有限公司 | Sealed junction box, bulkhead and ship |
| CN115021175B (en) * | 2022-07-08 | 2024-03-15 | 上海外高桥造船有限公司 | Sealed junction box, bulkhead and ship |
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