A cable rear connector and a detachable cable terminal

Abstract

The utility model discloses a cable rear joint and a detachable cable terminal, wherein the cable rear joint comprises a main insulating layer, an inner semi-conductive layer is arranged inside the main insulating layer, the main insulating layer has a plug part protruding outward, the outer peripheral wall of the plug part is tapered, the inner semi-conductive layer is extended inwardly of the plug part and an extension sleeve is arranged, and a terminal jack is also arranged on the inner semi-conductive layer; an outer semi-conductive layer, the outer semi-conductive layer is covered on the outer wall of the main insulating layer except the plug part; a reinforcing insulating ring, the reinforcing insulating ring is embedded in the middle of the outer wall of the plug part of the main insulating layer, and the reinforcing insulating ring has a tapered surface matching the outer wall surface of the plug part; the main insulating layer, the inner semi-conductive layer, the outer semi-conductive layer and the reinforcing insulating ring are a vulcanized integrated structure. The inner shielding of the rear joint in the utility model adopts an integrated inner semi-conductive layer, and the whole adopts an integrated vulcanization process, which optimizes the production process and effectively improves the production efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of cable T-type connectors, in particular to a cable rear connector and a detachable cable terminal. Background Art

[0002] Separable cable terminals are also called T-type plugs, including front plugs and rear connectors. They are mainly used in main network or ring network systems where the installation location is limited by space, such as ring network cabinets, and where personal or equipment safety issues may occur if the cable system is not used. They are used to ensure that the line safety when the cable system is connected to the main circuit of the cabinet itself does not exceed the operating allowable value.

[0003] Many of the existing rear connectors have their internal shielding and support provided by aluminum tubes or copper tubes, which need to be inserted into the plug portion of the rear connector and fit with the inner wall of the plug portion. The degree of fit also affects the quality of the rear connector, and the manufacturing process is complicated, affecting production efficiency. Therefore, there is an urgent need to provide a cable rear connector and a detachable cable terminal to solve this problem. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a cable rear connector and a detachable cable terminal.

[0005] In order to achieve the above object, the technical solution of the utility model is as follows:

[0006] The utility model provides a cable rear connector, comprising:

[0007] A main insulating layer, wherein an inner semi-conductive layer is arranged inside the main insulating layer, the main insulating layer has a plug portion protruding outward, the outer peripheral wall of the plug portion is tapered, the inner semi-conductive layer is extended toward the inside of the plug portion and an extension sleeve portion is arranged, and the inner semi-conductive layer is also provided with a terminal jack;

[0008] An outer semi-conductive layer, the outer semi-conductive layer is covered on the outer wall of the main insulating layer except the plug portion;

[0009] A reinforced insulating ring, which is embedded in the middle of the outer wall of the plug portion of the main insulating layer, and has a conical surface matching the outer wall surface of the plug portion;

[0010] The main insulating layer, the inner semi-conductive layer, the outer semi-conductive layer and the reinforced insulating ring are a vulcanized integrated structure.

[0011] As a further improvement of the present invention, a grounding lug is further provided on the side of the bottom of the outer semiconductive layer.

[0012] As a further improvement of the present invention, two grounding ears are provided, the grounding ears and the outer semi-conductive layer are an integrated structure, and a connecting hole is provided on the grounding ears.

[0013] As a further improvement to the present invention, annular grooves are provided on the outer walls at both ends of the reinforced insulating ring, and the main insulating layer has an annular convex portion embedded in the annular groove.

[0014] The utility model also provides a detachable cable terminal, including the above-mentioned cable rear joint, and also includes a stress cone, a front plug, a C-type sleeve, a stud bolt, and a connecting copper rod. The front plug is plugged into the C-type sleeve, the cable end is covered with the stress cone, and the stud bolt is threadedly connected to the connecting copper rod.

[0015] As a further improvement of the utility model, it also includes a rear-connected lightning arrester, the inner cavity of the rear end of the rear-connected lightning arrester is provided with a rear plugging, and the rear end cover of the rear-connected lightning arrester is provided with a dust cover.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the inner shielding of the rear joint in the utility model adopts an integrated inner semi-conductive layer, that is, an extension sleeve is integrally provided on the inner semi-conductive layer, and is integrally vulcanized and formed, which simplifies the assembly process, optimizes the processing technology, and can effectively improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the cross-sectional structure of the rear joint in the utility model;

[0018] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of the separate cable terminal in the utility model.

[0020] In the above drawings: 10-plug part; 11, main insulating layer; 12, outer semi-conductive layer; 13, inner semi-conductive layer; 131, terminal jack; 132, extension sleeve; 14, reinforced insulating ring; 15, clamp; 16, grounding ear; 2, stress cone; 3, cable; 4, front plug; 5, C-type sleeve; 6, stud bolt; 7, connecting copper rod; 8, rear lightning arrester; 9, rear plugging; 20, dust cover. DETAILED DESCRIPTION

[0021] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] like Figure 1-Figure 2As shown, the utility model provides the following embodiments: a cable rear connector, which includes a main insulating layer 11, an outer semi-conductive layer 12, an inner semi-conductive layer 13 and a reinforced insulating ring 14, the main insulating layer 11 is a T-shaped structure, and has a horizontal through cavity and a vertical through cavity inside, the upper end of the vertical through cavity is connected to the middle of the horizontal through cavity, the inner semi-conductive layer 13 is arranged inside the main insulating layer 11, the main insulating layer 11 has a plug part 10 protruding outward, the outer peripheral wall of the plug part 10 is conical, the inner semi-conductive layer 13 is integrally provided with an extension sleeve 132 extending into the plug part 10, and the inner semi-conductive layer 13 is also provided with a terminal jack 131; the outer semi-conductive layer 12 is covered on the outer wall of the main insulating layer 11 except the plug part 10; the reinforced insulating ring 1 4 is embedded in the middle of the outer wall of the plug part 10 of the main insulating layer 11, and the reinforcing insulating ring 14 has a conical surface matching the outer wall of the plug part 10; the main insulating layer 11, the inner semi-conductive layer 13, the outer semi-conductive layer 12 and the reinforcing insulating ring 14 are a vulcanized integrated structure; the inner semi-conductive layer 13 is integrally provided with the extending sleeve 132, which can play the role of inner shielding, so that there is no need to assemble copper tubes or aluminum tubes for shielding, and the vulcanization process is adopted, the overall structure is stable, the manufacturing process is simple and reasonable, and the production efficiency can be improved; and through the setting of the reinforcing insulating ring 14, the strength of the corresponding plug part 10 can be strengthened, and after the plug part 10 is plugged into the front connector, the existence of the reinforcing insulating ring 14 is conducive to enhancing its tight fit with the inner wall of the front connector cavity, further improving the use performance. Preferably, the outer end of the extending sleeve 132 is flush with the outer end edge of the plug part 10.

[0023] As a further improvement of the present invention, annular grooves 141 are provided on the outer walls at both ends of the reinforcing insulating ring 14 , and the main insulating layer 11 has an annular protrusion embedded in the annular groove 141 , thereby enhancing the bonding strength between the reinforcing insulating ring 14 and the main insulating layer 11 .

[0024] Preferably, the main insulating layer 11 is made of EPDM insulating rubber, which has the characteristics of good sealing performance, moisture resistance, waterproofness, anti-aging, flame retardancy, corona resistance, and long-term maintenance-free operation. The outer semi-conductive layer 12 is made of EPDM conductive rubber, which cooperates with the cable shield to achieve shield continuity and ensure that it is in a grounding state. The inner semi-conductive layer 13 is made of EPDM conductive rubber to effectively control and disperse electrical stress; the reinforcing insulating ring 14 can be made of plastic materials (such as epoxy resin, nylon, etc.).

[0025] As another preferred solution of the present invention, a grounding lug 16 is further provided on the side of the bottom of the outer semiconductive layer 12, and the grounding lug 16 is used to connect a grounding wire.

[0026] As another preferred embodiment of the present invention, two grounding ears 16 are provided, which can be symmetrically distributed on both sides of the bottom of the outer semi-conductive layer 12. When connecting the grounding wire, they can be selected as needed, which is convenient and flexible. The grounding ear 16 and the outer semi-conductive layer 12 are an integrated structure, and a connecting hole is opened on the grounding ear 16 to facilitate bolt connection.

[0027] As another preferred solution of the present invention, a clamp 15 is provided on the top of the main insulating layer 11 .

[0028] See also Figure 3 A detachable cable terminal includes the above-mentioned cable rear connector, and also includes a stress cone 2, a front plug 4, a C-type sleeve 5, a stud bolt 6, and a connecting copper rod 7. The cable 3 is first pre-treated, and then the stress cone 2 is installed, and the cable 3 with the stress cone 2 installed is vertically inserted into the front plug 4.

[0029] Before installing the front plug 4 and the C-type sleeve 5, a stud bolt 6 must be installed with the C-type sleeve 5 first, and the front plug 4 with the cable 3 installed is put on the tail end of the C-type sleeve 5, and then the connecting copper rod 7 is connected to the stud bolt 6 in the front plug 4, and another stud bolt 6 is installed at the tail end of the connecting copper rod 7.

[0030] Then install the rear connector of the cable, first install the cable 3 with the stress cone 2 installed with the rear connector, and then plug the rear connector of the cable with the front plug 4.

[0031] As another preferred solution of the present invention, a rear lightning arrester 8 may be installed to enhance protection.

[0032] The rear end cavity of the rear arrester 8 is provided with a rear plug 9, and the rear end cover of the rear arrester 8 is provided with a dust cover 20. Before installing the rear plug 9, insert the flat washer and spring washer in sequence, tighten the nut, then install the rear plug 9, and finally cover the dust cover 20. Finally, do a good job of grounding.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A cable rear connector, characterized in that: include: A main insulating layer (11), an inner semi-conductive layer (13) is arranged inside the main insulating layer (11), the main insulating layer (11) has a plug portion (10) protruding outward, the outer peripheral wall of the plug portion (10) is tapered, the inner semi-conductive layer (13) is provided with an extension sleeve portion (132) extending into the plug portion (10), and the inner semi-conductive layer (13) is also provided with a terminal insertion hole (131); An outer semi-conductive layer (12), the outer semi-conductive layer (12) being coated on the outer wall of the main insulating layer (11) except for the plug portion; A reinforced insulating ring (14), the reinforced insulating ring (14) being embedded in the middle of the outer wall of the plug portion (10) of the main insulating layer (11), and the reinforced insulating ring (14) having a conical surface matching the outer wall surface of the plug portion (10); The main insulating layer (11), the inner semi-conductive layer (13), the outer semi-conductive layer (12) and the reinforced insulating ring (14) are a vulcanized integrated structure.

2. The cable rear connector according to claim 1, characterized in that: A grounding lug (16) is also provided on the side of the bottom of the outer semiconductive layer (12).

3. The cable rear connector according to claim 2, characterized in that: The grounding lugs (16) are provided in two numbers, the grounding lugs (16) and the outer semi-conductive layer (12) are an integrated structure, and a connection hole is provided on the grounding lugs (16).

4. The cable rear connector according to claim 1, characterized in that: Annular grooves (141) are provided on the outer walls at both ends of the reinforced insulating ring (14), and the main insulating layer (11) has an annular convex portion embedded in the annular groove (141).

5. The cable rear connector according to claim 1, characterized in that: A clamp (15) is provided on the top of the main insulating layer (11).

6. A detachable cable terminal, comprising the cable rear connector according to any one of claims 1 to 5, characterized in that: It also comprises a stress cone (2), a front plug (4), a C-type sleeve (5), a stud bolt (6), and a connecting copper rod (7); the front plug (4) is plugged into the C-type sleeve (5); the end of the cable (3) is sleeved with the stress cone (2); and the stud bolt (6) is threadedly connected to the connecting copper rod (7).

7. The detachable cable terminal according to claim 6, characterized in that: It also includes a rear lightning arrester (8), the inner cavity at the rear end of the rear lightning arrester (8) is provided with a rear plug (9), and the rear end cover of the rear lightning arrester (8) is provided with a dust cover (20).

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