Explosion-proof cable junction box

Abstract

The utility model relates to an explosion-proof cable junction box. The technical problem to be solved by the utility model is to provide a cable explosion-proof junction box which is good in sealing performance and tight in connection. According to the technical scheme, the junction box comprises a junction box lower box body, a junction box upper box body, a clamping ring and a first sealing block, the junction box lower box body is provided with a semicircular arc lower groove, and the semicircular arc lower groove is sequentially provided with a cable main butt joint lower groove, a cable transition lower groove and a cable pressing lower groove from inside to outside. A lower clamping groove is formed in the cable pressing lower groove, a cable main butt joint upper groove, a cable transition upper groove and a cable pressing upper groove are formed in the junction box upper box body, an upper clamping groove is formed in the cable pressing upper groove, and clamping tooth sets are arranged in the clamping ring at intervals. The utility model has the advantages that the clamping ring can effectively enhance the clamping force of the cable, effectively prevents the problem of cable loosening caused by frequent cable pulling and stretching, and improves the sealing performance.

Description

Technical Field

[0001] The utility model relates to an explosion-proof cable junction box. Background Art

[0002] The cable explosion-proof junction box is a protective device for protecting the middle joints of power cables. It has the advantage of good sealing, can protect the middle joints of power cables from external forces, and prevent water from entering and causing cable failures. The cable explosion-proof junction box has high mechanical strength and good pressure resistance. The cables are connected inside the box to prevent sparks and exposed wires at the connection, thereby achieving the purpose of safe wiring. The existing cable explosion-proof junction boxes have the following problems: 1. Although the inside of the junction box is insulated and isolated by pouring epoxy resin, with frequent cable pulling and stretching, it is easy to cause the internal cable outlet to loosen, thereby affecting the sealing performance and causing the waterproof and explosion-proof type to deteriorate; 2. The junction box body has few positioning structures, and is closely connected by simple screws, with large gaps and unsightly appearance. In view of the above two points, the existing cable explosion-proof junction box is improved and optimized. Utility Model Content

[0003] In order to solve the above problems, the technical problem to be solved by the utility model is to provide a cable explosion-proof junction box with good sealing and tight connection.

[0004] The technical solution adopted by the utility model explosion-proof cable junction box: It is characterized in that it includes a junction box lower box body for cable docking and two symmetrically arranged junction box upper box bodies, a clamping ring, and a first sealing block, the junction box lower box body is provided with a semicircular arc lower groove for cable installation, the semicircular arc lower groove is provided with a cable main docking lower groove, a cable transition lower groove and a cable pressing lower groove from the inside to the outside, the cable pressing lower groove is provided with a lower clamping groove, the junction box upper box body is provided with a cable main docking upper groove, a cable transition upper groove and a cable pressing upper groove corresponding to the semicircular arc lower groove, the cable pressing upper groove is provided with an upper clamping groove, the clamping ring is placed between the upper clamping groove and the lower clamping groove, the clamping ring is provided with a clamping tooth group for cable clamping at intervals, the clamping tooth group includes a large clamping tooth and a small clamping tooth, and the cross-sections of the large clamping tooth and the small clamping tooth are triangular;

[0005] The inner end surface of the upper box body of the junction box is provided with a semicircular butt joint convex edge, the semicircular butt joint convex edge is provided with a sealing block positioning groove, the sealing block positioning groove is provided with an upper box body butt joint hole around the arc, the first sealing block is placed on the sealing block positioning groove and fixedly connected to the two upper box bodies of the junction box through the upper box body butt joint hole.

[0006] Sealing block positioning columns and sealing block fixing holes corresponding to the upper box body docking holes are arranged around arcs at both ends of the first sealing block, and sealing block positioning holes corresponding to the sealing block positioning columns are arranged on the sealing block positioning groove.

[0007] The tooth height of the large clamping teeth is 1 mm, and the tooth height of the small clamping teeth is 0.7 mm.

[0008] The clamping ring is arranged close to the upper cable transition groove and one end of the lower cable transition groove.

[0009] It also includes an end face sealing strip, the lower box body of the junction box is provided with a lower box body docking edge and a lower box body retaining edge outside the semicircular arc lower groove, the upper box body of the junction box is provided with an upper box body edge corresponding to the lower box body docking edge and an upper box body retaining edge corresponding to the lower box body retaining edge, and the end face sealing strip is placed between the lower box body docking edge and the upper box body edge.

[0010] The outer wall of the upper box body of the junction box is provided with a casting hole at the upper groove of the main cable connection, and the outer wall of the upper box body of the junction box is provided with a flood discharge hole at the upper groove of the cable transition.

[0011] The clamping ring is made of rubber.

[0012] The advantages of the explosion-proof cable junction box of the utility model are: the clamping ring can effectively enhance the clamping force of the cable, effectively prevent the cable from loosening due to frequent pulling and stretching of the cable, and improve the sealing performance; the first sealing block and the end face sealing strip respectively have multiple positioning structures between the upper box body of the junction box and the lower box body of the junction box, so that the connection is firm and tight, and the waterproof performance is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0014] Figure 1 This is an exploded view of the utility model explosion-proof cable junction box;

[0015] Figure 2 It is a structural schematic diagram of the lower box body of the junction box of the utility model;

[0016] Figure 3 It is a schematic diagram of the internal structure of the upper box body of the junction box of the utility model;

[0017] Figure 4 It is a structural schematic diagram of the clamping ring of the utility model;

[0018] Figure 5 It is a cross-sectional view of the clamping ring of the utility model;

[0019] Figure 6 It is a schematic diagram of the external structure of the upper box body of the junction box of the utility model;

[0020] Figure 7 It is a structural schematic diagram of the first sealing block of the utility model. DETAILED DESCRIPTION

[0021] like Figure 1-7 As shown, the explosion-proof cable junction box involved in the utility model comprises a junction box lower box body 1 for cable docking and two symmetrically arranged junction box upper box bodies 2, a clamping ring 3, and a first sealing block 4, wherein the junction box lower box body 1 is provided with a semicircular arc lower groove for cable installation, and the semicircular arc lower groove is provided with a cable main docking lower groove 8, a cable transition lower groove 9 and a cable pressing lower groove 10 from the inside to the outside, and a lower clamping groove 11 is provided in the cable pressing lower groove 10, and a cable main docking upper groove 13, a cable transition upper groove 14 and a cable pressing upper groove 15 corresponding to the semicircular arc lower groove are provided in the junction box upper box body 2, and an upper clamping groove 16 is provided in the cable pressing upper groove 15, and the clamping ring 3 is placed between the upper clamping groove 16 and the lower clamping groove 11, and the clamping ring 3 is provided with clamps for cable clamping at intervals. A tightening tooth group 18, wherein the clamping tooth group 18 comprises a large clamping tooth 19 and a small clamping tooth 20, wherein the cross-sections of the large clamping tooth 19 and the small clamping tooth 20 are triangular; a semicircular arc butt convex edge 22 is provided on the inner end surface of the upper box body 2 of the junction box, and a sealing block positioning groove 23 is provided on the semicircular arc butt convex edge 22, and an upper box body butt hole 24 is provided around the arc on the sealing block positioning groove 23; the first sealing block 4 is placed on the sealing block positioning groove 23 and is fixedly connected to the two upper box bodies 2 of the junction box through the upper box body butt hole 24; the clamping ring 3 can effectively enhance the clamping force of the cable, and effectively prevent the cable from loosening due to frequent pulling and stretching of the cable, thereby improving the sealing performance; a positioning structure is provided between the first sealing block 4 and the upper box body 2 of the junction box, so that the connection is firm and tight, and the waterproof performance is higher.

[0022] Sealing block positioning columns 25 and sealing block fixing holes 26 corresponding to the upper box body docking holes 24 are provided around arcs at both ends of the first sealing block 4, and sealing block positioning holes 27 corresponding to the sealing block positioning columns 25 are provided on the sealing block positioning groove 23, further strengthening the connection tightness between the first sealing block 4 and the upper box body 2 of the junction box.

[0023] The tooth height of the large clamping teeth 19 is 1 mm, and the tooth height of the small clamping teeth 20 is 0.7 mm, which effectively enhances the gripping force without damaging the wire.

[0024] The clamping ring 3 is arranged close to the cable transition upper groove 14 and one end of the cable transition lower groove 9, so that the sealing performance is better.

[0025] The terminal box further comprises an end face sealing strip 5. The lower box body 1 of the junction box is provided with a lower box body docking edge 30 and a lower box body retaining edge 31 outside the semicircular arc lower groove. The upper box body 2 of the junction box is provided with an upper box body edge 33 corresponding to the lower box body docking edge 30 and an upper box body retaining edge 34 corresponding to the lower box body retaining edge 31. The end face sealing strip 5 is arranged between the lower box body docking edge 30 and the upper box body edge 33. There are multiple positioning structures between the end face sealing strip 5 and the lower box body 1 of the junction box, so that the connection is firm and tight, and the waterproof property is higher.

[0026] The outer wall of the upper box body 2 of the junction box is provided with a casting hole 37 at the cable main docking upper groove 13, and the outer wall of the upper box body 2 of the junction box is provided with a flood discharge hole 38 at the cable transition upper groove 14, which is more convenient to install and has better flame retardancy.

[0027] The clamping ring 3 is made of rubber.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims

1. An explosion-proof cable junction box, characterized in that: The invention comprises a junction box lower box body (1) for connecting cables, two symmetrically arranged junction box upper box bodies (2), a clamping ring (3), and a first sealing block (4), wherein the junction box lower box body (1) is provided with a semicircular arc lower groove for cable installation, wherein the semicircular arc lower groove is provided with a cable main connecting lower groove (8), a cable transition lower groove (9), and a cable pressing lower groove (10) in sequence from the inside to the outside, wherein a lower clamping groove (11) is provided in the cable pressing lower groove (10), and a cable corresponding to the semicircular arc lower groove is provided in the junction box upper box body (2). A main docking upper groove (13), a cable transition upper groove (14) and a cable clamping upper groove (15), wherein an upper clamping groove (16) is provided in the cable clamping upper groove (15), the clamping ring (3) is arranged between the upper clamping groove (16) and the lower clamping groove (11), and a clamping tooth group (18) for cable clamping is provided in the clamping ring (3), wherein the clamping tooth group (18) comprises a large clamping tooth (19) and a small clamping tooth (20), and the cross-sections of the large clamping tooth (19) and the small clamping tooth (20) are triangular; The inner end surface of the upper box body (2) of the junction box is provided with a semi-circular arc butt joint convex edge (22), the semi-circular arc butt joint convex edge (22) is provided with a sealing block positioning groove (23), the sealing block positioning groove (23) is provided with an upper box body butt joint hole (24) around an arc, the first sealing block (4) is placed on the sealing block positioning groove (23) and is fixedly connected to the two upper box bodies (2) of the junction box through the upper box body butt joint hole (24).

2. The explosion-proof cable junction box according to claim 1, characterized in that: The first sealing block (4) has sealing block positioning columns (25) and sealing block fixing holes (26) corresponding to the upper box body docking holes (24) arranged around circular arcs at both ends, and the sealing block positioning groove (23) has sealing block positioning holes (27) corresponding to the sealing block positioning columns (25).

3. The explosion-proof cable junction box according to claim 1, characterized in that: The tooth height of the large clamping teeth (19) is 1 mm, and the tooth height of the small clamping teeth (20) is 0.7 mm.

4. The explosion-proof cable junction box according to claim 1, characterized in that: The clamping ring (3) is arranged close to the upper cable transition groove (14) and one end of the lower cable transition groove (9).

5. The explosion-proof cable junction box according to claim 1, characterized in that: The terminal box further comprises an end face sealing strip (5); the lower box body (1) of the terminal box is provided with a lower box body butt-jointing edge (30) and a lower box body retaining edge (31) outside the semicircular arc lower groove; the upper box body (2) of the terminal box is provided with an upper box body butt-jointing edge (33) corresponding to the lower box body butt-jointing edge (30) and an upper box body retaining edge (34) corresponding to the lower box body retaining edge (31); and the end face sealing strip (5) is arranged between the lower box body butt-jointing edge (30) and the upper box body butt-jointing edge (33).

6. The explosion-proof cable junction box according to claim 1, characterized in that: The outer wall of the upper box body (2) of the junction box is provided with a casting hole (37) at the cable main docking upper groove (13), and the outer wall of the upper box body (2) of the junction box is provided with a flood discharge hole (38) at the cable transition upper groove (14).

7. The explosion-proof cable junction box according to claim 1, characterized in that: The clamping ring (3) is made of rubber.

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