An explosion-proof threading tube for electrical box

Abstract

The utility model provides an explosion-proof threading tube for an electrical box; it belongs to the field of electrical boxes; its technical key points include a threading mechanism, the threading mechanism includes a bottom tube, the top of the bottom tube is provided with an integrated lower connecting tube, and the top of the lower connecting tube is provided with an integrated upper connecting tube; a lower limit mechanism, the lower limit mechanism includes a limit ring detachably connected to the outer side of the lower connecting tube; an upper limit mechanism, the upper limit mechanism includes accommodating grooves arranged in an annular array on the outer side of the upper connecting tube, the interior of each group of the accommodating grooves is slidably connected to a limit block, the inner wall of each group of the upper connecting tubes is fixedly connected with a U-shaped metal spring sheet, and each group of the U-shaped metal spring sheets is respectively abutted with a side of each group of the limit blocks close to the interior of the accommodating groove; the utility model aims to provide an explosion-proof threading tube for an electrical box; it is used to make the installation of the entire explosion-proof threading tube more convenient and quick.

Description

Technical Field

[0001] The utility model relates to the field of electrical box, in particular to an explosion-proof wire threading tube for an electrical box. Background Art

[0002] An electrical box generally refers to a box that holds electrical appliances, such as a low-voltage box or a high-voltage box installed on electrical equipment. Depending on usage requirements, some electrical boxes are installed outdoors, while others are installed indoors. During the production process, electrical boxes generally have holes reserved for cables to pass through. In order to reduce wear between the cables and the walls of the electrical box holes, corresponding wire conduits are generally installed in these holes.

[0003] When installing the current wire tube, it is necessary to first pass the wire tube through the corresponding hole of the electrical box, and then screw the corresponding threaded ring on the outside of the wire tube so that the threaded ring is tightly against the electrical box to achieve the installation of the wire tube. However, the internal space of the electrical box is often relatively small, which makes it inconvenient to operate when twisting the threaded ring, thereby making the installation of the wire tube inconvenient. Utility Model Content

[0004] The utility model aims to provide an explosion-proof wire threading tube for an electrical box to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An explosion-proof wire threading tube for an electrical box, comprising

[0007] A threading mechanism, the threading mechanism comprising a bottom tube, the top of the bottom tube is provided with an integrated lower connecting tube, the top of the lower connecting tube is provided with an integrated upper connecting tube;

[0008] A lower limiting mechanism, the lower limiting mechanism comprising a limiting ring detachably connected to the outer side of the lower connecting tube;

[0009] The upper limit positioning mechanism includes a ring-shaped array of receiving grooves opened on the outside of the upper connecting tube, each group of the receiving grooves is slidably connected to a limiting block, and each group of the upper connecting tubes is fixedly connected to the inner wall with a U-shaped metal spring sheet, each group of the U-shaped metal spring sheets is respectively abutted against the side of each group of the limiting blocks close to the inside of the receiving groove.

[0010] As a further solution of the utility model: the top of the upper connecting pipe is provided with an integrated through-tube, and the top of the through-tube is provided with an annular inclined surface.

[0011] As a further solution of the utility model: the inner walls of the through-tube, the upper connecting tube, the lower connecting tube and the bottom tube are all fixedly connected with an integral reinforcing rib.

[0012] As a further solution of the utility model: the outer wall of the lower connecting pipe is provided with an external thread matched with the inner part of the limiting ring, and the limiting ring is threadedly connected to the upper connecting pipe.

[0013] As a further solution of the utility model: a sealing ring is abutted against the top of the limiting ring, and the sealing ring is sleeved on the outer side of the lower connecting pipe.

[0014] As a further solution of the utility model: the inner wall of each group of the accommodating grooves is symmetrically provided with limiting slide grooves, both sides of each group of the limiting blocks are fixedly connected with limiting sliding blocks adapted to the limiting slide grooves, and each group of the limiting sliding blocks is slidably connected to the upper connecting tube.

[0015] As a further solution of the utility model: the bottom of each group of limit blocks is movably connected with a ball.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] After the utility model adopts the above structure, through the mutual cooperation of the limiting ring, the limiting block, the accommodating groove and the U-shaped metal spring piece, when the entire wire threading tube is installed in the wire threading tube installation hole on the electrical box, it is only necessary to insert the upper connecting tube into the corresponding wire threading tube installation hole from the outside of the electrical box to the inside of the electrical box until each group of limiting blocks penetrates the wire threading tube installation hole, so that each group of limiting blocks extends out of the accommodating groove under the elastic action of each group of U-shaped metal spring pieces, and limits one side of the upper connecting tube. At the same time, the limiting ring abuts against the bottom of the electrical box, thereby limiting the other side of the upper connecting tube, so that the entire wire threading tube can be installed without twisting the threaded ring in the electrical box, making the installation of the entire explosion-proof wire threading tube more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below in conjunction with the embodiments in the accompanying drawings, but this does not constitute any limitation to the present invention.

[0019] Figure 1 The present invention is a schematic diagram of the overall structure of an explosion-proof wire threading tube for an electrical box.

[0020] Figure 2 An explosion-proof wire threading tube for an electrical box Figure 1 Schematic diagram of the A part structure.

[0021] Figure 3 This is a cross-sectional view of the local structure of an explosion-proof wire conduit in an electrical box.

[0022] Figure 4 An explosion-proof wire threading tube for an electrical box Figure 3 Schematic diagram of the structure of part B.

[0023] In the figure: 1. threading mechanism; 101. bottom tube; 102. lower connecting tube; 103. upper connecting tube; 104. annular inclined surface; 105. reinforcing rib; 106. through tube; 2. lower limiting mechanism; 201. external thread; 202. limiting ring; 203. sealing ring; 3. upper limiting mechanism; 301. receiving groove; 302. U-shaped metal spring; 303. limiting block; 304. limiting slide groove; 305. ball bearing; 306. limiting slider. DETAILED DESCRIPTION

[0024] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0025] See also Figure 1-4 , an explosion-proof threading tube for an electrical box, comprising a threading mechanism 1, the threading mechanism 1 comprising a bottom tube 101, the top of the bottom tube 101 is provided with an integrated lower connecting tube 102, and a lower limiting mechanism 2, the lower limiting mechanism 2 comprising a limiting ring 202 detachably connected to the outer side of the lower connecting tube 102, the setting of the limiting ring 202 is used to limit one side of the lower connecting tube 102 when the entire threading tube is installed in the threading tube installation hole corresponding to the electrical box. The outer wall of the lower connecting tube 102 is provided with an external thread 201 adapted to the inside of the limiting ring 202, the limiting ring 202 is threadedly connected to the upper connecting tube 103, and the limiting ring 202 is connected and fixed to the lower connecting tube 102 by a threaded connection, so that the position of the limiting ring 202 can be easily adjusted to adapt to the installation of the entire threading tube on electrical boxes with different wall thicknesses, thereby effectively improving the applicability of the entire threading tube.

[0026] The top of the limit ring 202 is abutted with a sealing ring 203, which is sleeved on the outer side of the lower connecting tube 102. The setting of the sealing ring 203 can seal the gap between the limit ring 202 and the electrical box to improve the sealing of the entire electrical box. The top of the lower connecting tube 102 is provided with an integrated upper connecting tube 103, and the upper connecting tube 103 is used to penetrate the threading tube installation hole of the electrical box. The top of the upper connecting tube 103 is provided with an integrated through-tube 106, and the top of the through-tube 106 is provided with an annular bevel 104. The setting of the annular bevel 104 can facilitate the insertion of the entire threading tube into the threading tube installation hole of the electrical box. The inner walls of the through-tube 106, the upper connecting tube 103, the lower connecting tube 102 and the bottom tube 101 are all fixedly connected with an integrated reinforcing rib 105. The setting of the reinforcing rib 105 can improve the strength of the entire threading tube, thereby reducing the probability of the entire threading tube bursting.

[0027] The upper limit mechanism 3 includes a receiving groove 301 arranged in an annular array on the outside of the upper connecting tube 103. The interior of each group of receiving grooves 301 is slidably connected to a limiting block 303. The receiving groove 301 is configured to accommodate the limiting block 303. The inner wall of each group of receiving grooves 301 is symmetrically provided with a limiting slide 304. Both sides of each group of limiting blocks 303 are fixedly connected with a limiting slider 306 adapted to the limiting slide 304. Each group of limiting sliders 306 is slidably connected to the upper connecting tube 103. The setting of the limiting slide 304 and the limiting slider 306 can guide the sliding of the limiting block 303. At the same time, the limiting slide 304 can limit the limiting slider 306 to reduce the probability of the limiting block 303 escaping from the interior of the receiving groove 301.

[0028] The bottom of each group of limit blocks 303 is movably connected with a ball 305, and the setting of the ball 305 can reduce the friction between the limit blocks 303 and the inner wall of the electrical box, thereby reducing the probability of the limit blocks 303 causing wear on the inner wall of the electrical box. The inner wall of each group of upper connecting tubes 103 is fixedly connected with a U-shaped metal spring 302, and each group of U-shaped metal spring 302 is respectively abutted against the inner side of each group of limit blocks 303 close to the receiving groove 301, so that the elastic action of the U-shaped metal spring 302 can push the limit block 303 to move away from the receiving groove 301, thereby limiting one side of the upper connecting tube 103.

[0029] During use, when the entire wire threading tube needs to be installed inside the wire threading tube mounting hole of the electrical box, the through tube 106 can be inserted from the outside of the electrical box into the inside of the wire threading tube mounting hole, so that the through tube 106 and the upper connecting tube 103 both penetrate the wire threading tube mounting hole of the electrical box, and at the same time, each group of limit blocks 303 passes through the wire threading tube mounting hole, so that each group of limit blocks 303 moves to the side away from the upper connecting tube 103 under the elastic action of each group of U-shaped metal spring pieces 302, so that each group of balls 305 is pressed against the inner wall of the electrical box, and at the same time, the sealing ring 203 can be pressed against the inner wall of the electrical box, thereby realizing the limiting fixation of the upper connecting tube 103, and then completing the installation of the entire wire threading tube, and then the cable can be passed through the bottom tube 101, the lower connecting tube 102, the upper connecting tube 103 and the through tube 106, so as to realize the insertion of the cable from the outside of the electrical box into the interior of the electrical box.

[0030] The above embodiments are preferred implementation modes of the present invention and are only used to facilitate the explanation of the present invention. They are not intended to limit the present invention in any form. Any person with ordinary knowledge in the relevant technical field, if they do not depart from the scope of the technical features of the present invention, can make equivalent embodiments by partial changes or modifications to the technical contents disclosed in the present invention, and they still fall within the scope of the technical features of the present invention without departing from the technical features of the present invention.

Claims

1. An explosion-proof wire threading tube for an electrical box, characterized in that: include A threading mechanism (1), the threading mechanism (1) comprising a bottom tube (101), the top of the bottom tube (101) being provided with an integrated lower connecting tube (102), the top of the lower connecting tube (102) being provided with an integrated upper connecting tube (103); A lower limiting mechanism (2), the lower limiting mechanism (2) comprising a limiting ring (202) detachably connected to the outer side of the lower connecting tube (102); An upper limit mechanism (3), the upper limit mechanism (3) comprising receiving grooves (301) arranged in a ring array on the outside of the upper connecting tube (103), the interior of each group of the receiving grooves (301) being slidably connected to a limiting block (303), the inner wall of each group of the upper connecting tube (103) being fixedly connected to a U-shaped metal spring sheet (302), and each group of the U-shaped metal spring sheet (302) being respectively abutted against a side of each group of the limiting block (303) close to the interior of the receiving groove (301).

2. The explosion-proof wire threading tube for an electrical box according to claim 1, characterized in that: An integral through-tube (106) is provided at the top of the upper connecting tube (103), and an annular inclined surface (104) is provided at the top of the through-tube (106).

3. The explosion-proof wire threading tube for an electrical box according to claim 2, characterized in that: The inner walls of the through-tube (106), the upper connecting tube (103), the lower connecting tube (102) and the bottom tube (101) are all fixedly connected with an integral reinforcing rib (105).

4. The explosion-proof wire threading tube for an electrical box according to claim 1, characterized in that: The outer wall of the lower connecting tube (102) is provided with an external thread (201) adapted to the interior of the limiting ring (202), and the limiting ring (202) is threadedly connected to the upper connecting tube (103).

5. The explosion-proof wire threading tube for an electrical box according to claim 4, characterized in that: The top of the limiting ring (202) is in contact with a sealing ring (203), and the sealing ring (203) is sleeved on the outside of the lower connecting pipe (102).

6. The explosion-proof wire threading tube for an electrical box according to claim 1, characterized in that: The inner wall of each group of the containing grooves (301) is symmetrically provided with limiting sliding grooves (304), and both sides of each group of the limiting blocks (303) are fixedly connected with limiting sliding blocks (306) adapted to the limiting sliding grooves (304), and each group of the limiting sliding blocks (306) is slidably connected to the upper connecting tube (103).

7. The explosion-proof wire threading tube for an electrical box according to claim 1, characterized in that: The bottom of each group of the limit blocks (303) is movably connected with a ball (305).

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