A flameproof junction box for mining

Abstract

The present application relates to the technical field of junction boxes and discloses a flameproof junction box for mining, which includes a box body, an upper end of the box body is provided with a accommodating groove, a cover body is provided on the box body, at least two wire inlet pipes are provided on the box body, and the end face of the wire inlet pipe away from the box body is provided with a wire inlet hole for the power line to pass through, and a clamping structure is provided on the wire inlet pipe, the clamping structure includes a fixed tube arranged on the side of the wire inlet pipe away from the box body and a first movable tube detachably connected to the wire inlet pipe, the fixed tube is elastic, and the end face of the fixed tube away from the feed hole is provided with a fixed hole connected to the wire inlet hole, an elastic tube is provided in the fixed hole, and the end face of the fixed tube away from the wire inlet pipe is provided with a fixed groove, which is respectively connected to the inner wall of the fixed tube and the outer circumferential surface of the fixed tube, the end face of the first movable tube away from the box body is provided with a first movable hole, and the interior of the first movable tube is provided with an inclined surface, and the first movable tube can be driven to fix and deform. The present application has the effect of clamping the wires.

Description

Technical Field

[0001] The present application relates to the technical field of junction boxes, and in particular to a flameproof junction box for mining. Background Art

[0002] At present, mining flameproof junction boxes are mainly used in dangerous environments such as underground coal mine mining working faces, tunnels and caverns. The junction boxes can be connected to cables of communication system equipment and cables of monitoring system equipment.

[0003] In the related art, a junction box includes a box body and a cover body, wherein the cover body is covered on the box body, a terminal is provided inside the box body, and a through hole communicating with the interior of the box body is opened on the box body.

[0004] Regarding the above-mentioned related technologies, the inventor believes that the through holes on the existing box body are all larger than the diameter of the cable to facilitate the adaptation of cables of different thicknesses. After the cable is passed through the through hole and connected to the terminal, when the diameter of the wire is smaller than the inner diameter of the through hole, the wire is easy to move in the through hole, so it needs to be improved. Summary of the Invention

[0005] In order to improve the problem of easy displacement of wire positions, the present application provides a mining flameproof junction box.

[0006] This application provides a mining flameproof junction box, which adopts the following technical solution:

[0007] A flameproof junction box for mining, comprising a box body, a accommodating groove being provided at the upper end of the box body, a cover being provided on the box body, at least two wire inlet tubes being provided on the box body, a wire inlet hole being provided at the end face of the wire inlet tube away from the box body for the power line to pass through, a clamping structure being provided on the wire inlet tube, the clamping structure comprising a fixed tube arranged at a side of the wire inlet tube away from the box body and a first movable tube detachably connected to the wire inlet tube, the fixed tube being elastic, a fixed hole communicating with the wire inlet hole being provided at the end face of the fixed tube away from the feed hole, an elastic tube being provided in the fixing hole, a fixing groove being provided at the end face of the fixed tube away from the wire inlet tube, the fixing groove being respectively connected to the inner wall of the fixed tube and the outer circumferential surface of the fixed tube, the first movable tube being provided with a first movable hole at the end face away from the box body, an inclined surface being provided inside the first movable tube, and the first movable tube being driveable for fixed deformation.

[0008] By adopting the above technical solution, the electric wire is inserted into the first movable hole, the fixed hole and the wiring hole, and then the first movable tube is driven to rotate. When the inclined surface contacts the fixed tube, the movable tube applies a force to the fixed tube, causing the fixed tube to deform. The force of the movable tube is transmitted to the elastic tube, causing the elastic tube to deform. Both the fixed tube and the elastic tube are deformed toward the axis of the fixed hole, so that both the fixed tube and the elastic tube can clamp the electric wire. The deformed elastic tube also blocks the wiring hole, making it difficult for outside air and foreign matter to enter the box body, thereby improving the sealing performance of the junction box and improving the safety of the junction box.

[0009] Optionally, the outer diameter of the fixed tube gradually decreases in a direction away from the box body.

[0010] By adopting the above technical solution, when the outer circumferential surface of the fixing tube abuts against the inclined surface, the fixing tube is more easily deformed.

[0011] Optionally, a plurality of the fixing grooves are provided, and the plurality of fixing grooves are distributed in a circular array along the axis of the fixing hole.

[0012] By adopting the above technical solution, when the first movable tube is connected to the wire inlet tube, the fixed tube is more easily deformed, so that the wires can be clamped better.

[0013] Optionally, a side of the elastic tube away from the accommodating groove is fixedly connected to a limiting ring block.

[0014] By adopting the above technical solution, a limiting ring block is provided. When the limiting ring block abuts against the fixing pipe, the limiting ring block is no longer inserted into the fixing hole, thereby having a limiting effect.

[0015] Optionally, a clamping assembly for clamping the wires is provided on the first movable tube, and the clamping assembly includes a semi-annular operating block arranged on the side of the first movable tube away from the box body, and a support block is provided on the outer circumference of the operating block, and a pressure plate is detachably connected to the support block, and fasteners connecting the two support blocks and the pressure plate are provided between the two support blocks and the pressure plate.

[0016] Optionally, a first baffle is provided on the end surface of the pressure plate away from the support block.

[0017] By adopting the above technical solution, when the pressing plate is mounted on the supporting block, the first baffle can block part of the first movable hole, thereby reducing dust from entering the first movable hole and playing a dust-proof role.

[0018] Optionally, an operating tube is provided on the end face of the operating block away from the first movable tube, an operating hole is opened on the operating tube in the direction away from the operating block, and the outer diameter of the operating tube and the inner diameter of the operating hole gradually increase in the direction away from the first movable tube.

[0019] By adopting the above technical solution, the shape setting of the operating tube and the operating hole makes it easier to insert the wires into the first movable tube and the wire inlet tube, making it convenient to install the wires and the junction box.

[0020] Optionally, a second movable tube is rotatably connected to the inside of the wire inlet tube, and the second movable tube extends into the accommodating groove. A second movable hole connected to the wiring hole is provided on the end face of the second movable tube away from the first movable tube, and a third movable hole connected to the second movable hole is provided on the outer circumferential surface of the second movable tube, and the third movable hole passes through the second movable tube in a direction away from the second movable tube.

[0021] By adopting the above technical solution, the wires are embedded in the third movable hole during the process of being connected to the power terminal block inside the box body after passing through the wire inlet tube and the second movable tube; when the operator adjusts the direction of the clamping structure and drives the first movable ring to rotate, the second movable tube is difficult to rotate due to the limitation of the wires, which reduces the contact between the wires and the first movable tube, and also reduces the scratches between the wires and the first movable tube or the second movable tube, making the outer tube of the wires less likely to be damaged and improving the service life of the wires.

[0022] Optionally, two opposite inner walls of the third movable hole are each provided with an elastic block.

[0023] By adopting the above technical solution, an elastic block is provided to have a limiting function. When the wire is embedded in the third movable hole, the wire can be prevented from falling out of the third movable hole.

[0024] Optionally, a handle is provided on one side of the box body.

[0025] By adopting the above technical solution, a handle is provided to facilitate the staff to move the junction box, thereby facilitating transportation.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. Insert the wires into the first movable hole, the fixed hole, and the wiring hole, then drive the first movable tube to rotate. When the inclined surface contacts the fixed tube, the movable tube applies a force to the fixed tube, causing the fixed tube to deform. The force of the movable tube is transmitted to the elastic tube, causing the elastic tube to deform. Both the fixed tube and the elastic tube deform toward the axis of the fixed hole, so that both the fixed tube and the elastic tube can clamp the wires. The deformed elastic tube also blocks the wiring hole, preventing outside air and foreign matter from entering the box body, thereby improving the sealing performance of the junction box and enhancing the safety of the junction box.

[0028] 2. Pass the wires through the pressure plate and the operating block, and use the fasteners to move the pressure plate toward the operating block to clamp the wires so that they are not easily moved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural diagram of an embodiment of the present application;

[0030] Figure 2 It is an exploded view highlighting the structure of the junction box;

[0031] Figure 3 It is along Figure 1 Partial cross-sectional view along line AA.

[0032] Figure numerals: 1. box body; 11. accommodating groove; 12. terminal; 2. cover body; 3. wire inlet pipe; 31. wire inlet hole; 4. clamping structure; 41. fixing tube; 411. fixing hole; 412. fixing groove; 42. first movable tube; 421. cylindrical portion; 422. frustum portion; 423. fixing block; 424. first movable hole; 425. inclined surface; 43. elastic tube; 431. limiting ring block; 5. clamping assembly; 51. operating block; 52. supporting block; 521. threaded hole; 53. pressing plate; 531. punching hole; 54. fastener; 541. fastening bolt; 55. friction strip; 56. first baffle; 57. second baffle; 58. operating tube; 6. second movable tube; 61. second movable hole; 62. third movable hole; 63. elastic block; 7. handle. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-3 This application is described in further detail.

[0034] This embodiment discloses a flameproof junction box for mining. Figure 1 and Figure 2 A flameproof junction box for mining applications includes a box body 1 and a cover 2. The box body 1 is cylindrical, with a receiving groove 11 defined in its upper end. Terminals 12 are fixedly connected to the bottom wall of the receiving groove 11. The cover 2 is removably connected to the box body 1 via bolts. In other embodiments, the box body 1 may be in the shape of a right n-shaped prism, where n ≥ 3.

[0035] Reference Figure 1 There are three inlet pipes 3 on the box body 1, and the three inlet pipes 3 are distributed circumferentially along the outer circumference of the box body 1. In other embodiments, different numbers of inlet pipes 3 are provided.

[0036] Reference Figure 2 The end surface of the inlet pipe 3 away from the box body 1 is provided with an inlet hole 31, which is connected to the accommodating groove 11 and can allow the wire to pass through. A clamping structure 4 is provided on the inlet pipe 3 to clamp the wires.

[0037] Reference Figure 2 and Figure 3The clamping structure 4 includes a fixed tube 41, a first movable tube 42 and an elastic tube 43. The first movable tube 42 is detachably connected to the inlet tube 3, and the outer circumferential surface of the inlet tube 3 is provided with an external thread. A first movable hole 424 is provided on the first movable tube 42. The first movable tube 42 includes an integrally formed cylindrical portion 421 and a frustum portion 422, and the inner wall of the cylindrical portion 421 is provided with an internal thread. The inner wall of the frustum portion 422 is provided with an inclined surface 425. A fixed block 423 is fixedly connected to the outer circumferential surface of the frustum portion 422, and the fixed block 423 is in the shape of a right n prism, where n≥3. In this application, the fixed block 423 adopts a right hexagonal prism shape.

[0038] Reference Figure 2 and Figure 3 The fixing tube 41 is fixedly connected to the end of the inlet pipe 3 away from the box body 1. The outer diameter of the fixing tube 41 gradually increases as it approaches the box body 1. The maximum outer diameter of the fixing tube 41 is no greater than the outer diameter of the inlet pipe 3. The fixing tube 41 is elastic. A fixing hole 411 is defined at the end of the fixing tube 41 away from the box body 1. The inner diameter of the fixing hole 411 gradually increases as it approaches the box body 1. The maximum inner diameter of the fixing hole 411 is greater than the inner diameter of the inlet hole 31, and the minimum inner diameter of the fixing hole 411 is no greater than the inner diameter of the inlet hole 31.

[0039] Reference Figure 2 , a plurality of fixing grooves 412 are provided on the side of the fixing hole 411 away from the inlet pipe 3, and the plurality of fixing grooves 412 are distributed in a circular array along the axis of the fixing hole 411. One side of the fixing groove 412 is connected to the fixing hole 411, and the side of the fixing groove 412 away from the axis of the fixing hole 411 passes through the fixing pipe 41. The extension direction of the fixing groove 412 is consistent with the axial direction of the fixing hole 411. In other embodiments, the fixing groove 412 is in the shape of a spiral groove and is consistent with the direction in which the first movable pipe 42 is rotated and tightened. When the first movable pipe 42 is rotated and tightened, the fixing pipe 41 is more easily deformed, thereby achieving clamping of the wires and having a labor-saving effect.

[0040] Reference Figure 2 An elastic tube 43 is provided in the fixing hole 411, and the elastic tube 43 is truncated cone-shaped. The maximum outer diameter of the elastic tube 43 is larger than the inner diameter of the inlet pipe 3, and the maximum outer diameter of the elastic tube 43 is the minimum outer diameter of the fixing groove 412. A perforation is provided at the end of the elastic tube 43 away from the box body 1, and the perforation is for the wire to pass through. In other embodiments, a limiting ring block 431 is provided on the outer circumference of the elastic tube 43. The limiting ring block 431 is located on the side of the fixed tube 41 away from the inlet pipe 3, and the outer diameter of the limiting ring block 431 is larger than the minimum outer diameter of the fixed tube 41. The elastic tube 43 is installed in the fixed tube 41, and the outer circumference of the elastic tube 43 is in contact with the inner wall of the fixed tube 41. When the limiting ring block 431 contacts the fixed tube 41, the elastic tube 43 is restricted from continuing to move toward the inlet pipe 3.

[0041] Reference Figure 2 and Figure 3 , a clamping assembly 5 is provided on the first movable tube 42, and the clamping assembly 5 is used to clamp the wires. The clamping assembly 5 includes an operating block 51, a support block 52, a pressure plate 53 and a fastener 54. The operating block 51 is fixedly connected to the end face of the first movable tube 42 away from the box body 1, and the operating block 51 is semi-annular. An operating groove is provided on the side of the operating block 51 facing the axis of the first movable tube 42, and the operating groove passes through the operating block 51 along the axis of the first movable tube 42. Two support blocks 52 are provided, and both support blocks 52 are fixedly connected to the outer circumferential surface of the operating block 51. The support blocks 52 are symmetrically distributed along the axis of the first movable tube 42.

[0042] Reference Figure 2 and Figure 3 Each support block 52 is detachably connected to the pressure plate 53 via a fastener 54. The fastener 54 includes a fastening bolt 541. The pressure plate 53 is provided with a punching hole 531 for the fastening bolt 541 to pass through. The support block 52 is provided with a threaded hole 521, which is threadedly engaged with the fastening bolt 541. A friction strip 55 is fixedly connected to the side of the pressure plate 53 facing the support block 52 to increase the friction between the pressure plate 53 and the wires, thereby improving the clamping effect of the junction box. The end surface of the pressure plate 53 away from the support block 52 is provided with a first baffle 56 and a second baffle 57. The first baffle 56 is located on the side of the fastening bolt 541 close to the first movable tube 42, and the second baffle 57 is located on the side of the fastening bolt 541 away from the first movable tube 42.

[0043] Reference Figure 2 and Figure 3 An operating tube 58 is fixedly connected to the end of the operating block 51 facing away from the housing 1. An operating hole is defined on the end of the operating tube 58 facing away from the first movable tube 42, communicating with the operating slot. The outer diameter of the operating tube 58 gradually increases as it moves away from the first movable tube 42, giving it a bell-shaped appearance. In other embodiments, the operating tube 58 may be truncated conical in shape.

[0044] Reference Figure 2 and Figure 3The second movable tube 6 is rotatably connected to the wire inlet tube 3. The outer circumferential surface of the second wiring tube is fixedly connected with a mounting ring block. The inner wall of the wire inlet hole 31 is provided with a mounting ring groove. The mounting ring block is embedded in the mounting ring groove so that the second movable tube 6 can rotate along the axis of the mounting ring groove. The second movable tube 6 extends into the accommodating groove 11. A second movable hole 61 is provided at the end of the second movable tube 6 away from the first movable tube 42. The second movable hole 61 can be used for the wire to pass through. A third movable hole 62 is provided on the outer circumferential surface of the second movable tube 6. The third movable hole 62 passes through the second movable tube 6 in a direction away from the first movable tube 42. The third movable hole 62 can be used for the wire to be embedded. Elastic blocks 63 are fixedly connected to the two opposite inner walls of the third movable hole 62, and the end faces of the two elastic blocks 63 that are close to each other are set as arc surfaces. When the wire is embedded in the third movable hole 62, the elastic block 63 limits the wire so that the wire is detached from the second movable tube 6.

[0045] Reference Figure 2 The outer side of the box body 1 is rotatably connected to a handle 7, which makes it easy to lift the wiring and move the junction box.

[0046] The implementation principle of a mining explosion-proof junction box in an embodiment of the present application is as follows: first, insert the wires into the operating tube 58, between the pressure plate 53 and the operating block 51, the first movable tube 42, the fixed tube 41, the wire inlet tube 3 and the second movable tube 6, and then connect the wires to the terminal 12; then rotate the first movable tube 42 to connect the first movable tube 42 with the wire inlet tube 3, deform the fixed tube 41 and the elastic tube 43, and clamp the wires to prevent them from moving easily; drive the fastening bolt 541 to rotate, so that the pressure plate 53 applies force to the wires to further clamp the wires.

[0047] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the design concept of the present application should be included in the scope of protection of the present application.

Claims

1. A flameproof junction box for mining, comprising a box body (1), an upper end of the box body (1) is provided with a receiving groove (11), and a cover (2) is provided on the box body (1), characterized in that: At least two inlet pipes (3) are provided on the box body (1), and an inlet hole (31) for the power line to pass through is provided on the end surface of the inlet pipe (3) away from the box body (1). A clamping structure (4) is provided on the inlet pipe (3), and the clamping structure (4) includes a fixed pipe (41) provided on the side of the inlet pipe (3) away from the box body (1) and a first movable pipe (42) detachably connected to the inlet pipe (3). The fixed pipe (41) is elastic, and the end surface of the fixed pipe (41) away from the feed hole is provided with a connecting inlet hole (31). A fixing hole (411) is provided in the fixing hole (411), an elastic tube (43) is provided in the fixing hole (411), a fixing groove (412) is provided on the end surface of the fixing tube (41) away from the inlet tube (3), the fixing groove (412) is communicated with the inner wall of the fixing tube (41) and the outer circumferential surface of the fixing tube (41), respectively, a first movable hole (424) is provided on the end surface of the first movable tube (42) away from the box body (1), an inclined surface (425) is provided inside the first movable tube (42), and the first movable tube (42) can be driven to be fixed and deformed; The first movable tube (42) is provided with a clamping assembly (5) for clamping the electric wire. The clamping assembly (5) comprises a semi-annular operating block (51) provided on a side of the first movable tube (42) away from the box body (1). A supporting block (52) is provided on the outer circumference of the operating block (51). A pressing plate (53) is detachably connected to the supporting block (52). A fastener (54) connecting the two supporting blocks (52) and the pressing plate (53) is provided between the two supporting blocks (52) and the pressing plate (53).

2. The flameproof junction box for mining according to claim 1, characterized in that: The outer diameter of the fixed tube (41) gradually decreases in a direction away from the box body (1).

3. The flameproof junction box for mining according to claim 1, characterized in that: A plurality of the fixing grooves (412) are provided, and the plurality of fixing grooves (412) are distributed in a circular array along the axis of the fixing hole (411).

4. The flameproof junction box for mining according to claim 1, characterized in that: The elastic tube (43) is fixedly connected to a limiting ring block (431) on one side away from the accommodating groove (11).

5. The flameproof junction box for mining according to claim 1, characterized in that: A first baffle (56) is provided on the end surface of the pressure plate (53) away from the support block (52).

6. The flameproof junction box for mining according to claim 1, characterized in that: An operating tube (58) is provided on the end surface of the operating block (51) away from the first movable tube (42), and an operating hole is opened in the direction of the operating tube (58) away from the operating block (51). The outer diameter of the operating tube (58) and the inner diameter of the operating hole gradually increase in the direction away from the first movable tube (42).

7. The flameproof junction box for mining according to claim 1, characterized in that: A second movable tube (6) is rotatably connected in the inlet tube (3), and the second movable tube (6) extends into the accommodating groove (11). A second movable hole (61) communicating with the wiring hole is provided on the end surface of the second movable tube (6) away from the first movable tube (42), and a third movable hole (62) communicating with the second movable hole (61) is provided on the outer circumferential surface of the second movable tube (6), and the third movable hole (62) penetrates the second movable tube (6) in a direction away from the second movable tube (6).

8. The flameproof junction box for mining according to claim 7, characterized in that: Two opposite inner walls of the third movable hole (62) are each provided with an elastic block (63).

9. The flameproof junction box for mining according to claim 1, characterized in that: A handle (7) is provided on one side of the box body (1).

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