CN217361994U

CN217361994U - Cold flow-proof explosion-proof cable joint

Info

Publication number: CN217361994U
Application number: CN202220301817.2U
Authority: CN
Inventors: 彭承辉
Original assignee: Mingmai Explosion Proof Technology Shanghai Co ltd
Current assignee: Mingmai Explosion Proof Technology Shanghai Co ltd
Priority date: 2022-02-15
Filing date: 2022-02-15
Publication date: 2022-09-02
Anticipated expiration: 2032-02-15

Abstract

The utility model belongs to cable glan joint field specifically discloses an anti-cold flow explosion-proof cable joint, including entry connector, first sealing washer, bush, second sealing washer, third sealing washer, well connector, gland nut, compact structure and plastics claw, the entry connector passes through the screw thread to be fixed on explosion-proof housing, and entry connector middle part is equipped with well connector, and well connector and entry connector front end recess department that is close to are equipped with the second sealing washer; the inlet connector is characterized in that a lining is arranged on the inner side of the inlet connector, a first sealing ring is arranged on one side, facing the end portion of the cable in the inlet connector, of the lining, and the first sealing ring is in contact with the outer end face of the cable. The utility model effectively prevents water and dust from entering the interior of the joint by increasing the length of the middle joint body and adding the sealing ring at the groove of the inlet joint body; and the components of the cold flow prevention design can reduce the occurrence of the cable 'cold flow' characteristic.

Description

Cold flow-proof explosion-proof cable joint

Technical Field

The utility model relates to a cable gland connects the field, specifically is an explosion-proof cable joint of anti-cold flow.

Background

At present, power cables are widely applied to power distribution networks in most cities in China, and cable joints can prolong the length of cable lines, keep the continuity and integrity of the cables and play a critical role in the cable lines of the power distribution networks.

The existing explosion-proof cable joint compresses a sealing ring through a shell of a gland, and the cable is compressed through the contraction of the sealing ring, so that the gland has explosion-proof and protective properties; however, since the tighter the thread of the glan jacket is screwed, the greater the force applied to the sealing ring and thus to the cable jacket when the cable joint is installed, the greater the force applied to the cable jacket by the sealing ring, when this force is greater than the resistance of the cable jacket to deformation, the permanent deformation of the cable jacket occurs, which is generally referred to as the "cold flow" characteristic of the cable. Cold flow can cause the insulation resistance of the cable to decrease creating a safety hazard.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an explosion-proof cable joint of anti-cold flow to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: an anti-cold-flow anti-explosion cable joint comprises an inlet joint body, a first sealing ring, a bushing, a second sealing ring, a third sealing ring, a middle joint body, a compression nut, a compression structure and a plastic claw, wherein the inlet joint body is fixed on an anti-explosion shell through threads; the inlet connects the internal side to be equipped with the bush, and the bush is equipped with first sealing washer towards the tip one side of cable in the inlet connects, and first sealing washer and the outer terminal surface contact of cable.

Preferably, the compression structure is arranged on the inner side of the middle connector and comprises a taper sleeve and a pressing ring, the pressing ring is arranged on the outer side of the taper sleeve, and the outer end armor layer of the cable can be compressed by screwing the middle connector to enable the taper sleeve and the pressing ring to be tightly pressed.

Preferably, a plastic claw is mounted at the head end of the inlet connection body, and the plastic claw is used for fixing the cable.

Preferably, the inner side of the plastic claw is provided with a third sealing ring, the outer side of the plastic claw is provided with a compression nut, the compression nut can extrude the plastic claw and the third sealing ring when being screwed, and the outer sheath of the cable is compressed through the contraction deformation of the third sealing ring so as to clamp and seal the cable.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model effectively prevents water and dust from entering the interior of the joint by increasing the length of the middle joint body and adding the sealing ring at the groove of the inlet joint body; and the subassembly of anti cold flow design can reduce the emergence of cable "cold flow" characteristic, utilizes the natural contraction force of a plurality of sealing washers to reduce the emergence of the interior sheath "cold flow" characteristic of cable promptly, prevents effectively that water and dust from entering into cold flow explosion-proof cable joint inside.

Drawings

Fig. 1 is a cross-sectional view of the present invention;

fig. 2 is a schematic perspective view of the present invention.

In the figure: 1. an inlet connection body; 2. a first seal ring; 3. a bushing; 4. a second seal ring; 5. a middle connector; 6. a taper sleeve; 7. pressing a ring; 8. a compression nut; 9. a third seal ring; 10. and (4) plastic claws.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1-2, the present invention provides a technical solution: an anti-cold-flow anti-explosion cable joint comprises an inlet joint body 1, a first sealing ring 2, a bushing 3, a second sealing ring 4, a third sealing ring 9, a middle joint body 5, a compression nut 8, a compression structure and a plastic claw 10, wherein the inlet joint body 1 is fixed on an anti-explosion shell through threads, the middle part of the inlet joint body 1 is provided with the middle joint body 5, and a groove at the front end, close to the inlet joint body 1, of the middle joint body 5 is provided with the second sealing ring 4; the inlet is connected 1 inboard and is equipped with bush 3, and bush 3 is equipped with first sealing washer 2 towards the tip one side of the interior cable of inlet connector 1, and first sealing washer 2 and the outer terminal surface contact of cable.

In this embodiment, the compressing structure is installed inside the intermediate connector 5, the compressing structure includes a taper sleeve 6 and a pressing ring 7, the pressing ring 7 is installed outside the taper sleeve 6, and the outer end armor layer of the cable can be compressed by screwing the intermediate connector 5 to make the taper sleeve 6 and the pressing ring 7.

In this embodiment, a plastic claw 10 is mounted at the head end of the inlet connection body 1, the plastic claw 10 being used for fixing the cable.

In the embodiment, the inner side of the plastic claw 10 is provided with the third sealing ring 9, the outer side of the plastic claw 10 is provided with the compression nut 8, and the compression nut 8 can extrude the plastic claw 10 and the third sealing ring 9 when being screwed, and compress the cable outer sheath through the contraction deformation of the third sealing ring 9 so as to clamp and seal the cable.

In the embodiment, the cold-flow explosion-proof cable joint can be fixed on the explosion-proof shell by the inlet connector 1 through threads, and a locking nut can be arranged in the explosion-proof shell if necessary; when an armored cable with the diameter suitable for the cold-flow explosion-proof cable connector is installed, the gland nut 8 is screwed to extrude the material claw 10 and the third sealing ring 9, and the cable outer sheath is compressed through the contraction deformation of the third sealing ring 9, so that the cable is clamped and sealed; the armor layer of the cable is compressed through the taper sleeve 6 and the pressing ring 7 by screwing the middle connector 5, meanwhile, the middle connector 5 can be screwed to compress the first sealing ring 2 and the lining 3 in the axial direction, so that the inner sheath layer of the cable is not subjected to the pressure of the radial sealing ring, the clamping and sealing of the inner sheath of the cable are realized through the natural contraction force of the first sealing ring 2, the deformation of the outer sheath of the cable caused by the natural contraction force of the first sealing ring 2 relative to the contraction force generated by compressing the sealing ring is small, and the cold flow characteristic of the inner sheath of the cable can be reduced; and the second sealing ring 4 can effectively prevent water and dust from entering the interior of the cold-flow explosion-proof cable joint.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The cold flow-proof and explosion-proof cable joint is characterized by comprising an inlet connector (1), a first sealing ring (2), a bushing (3), a second sealing ring (4), a third sealing ring (9), a middle connector (5), a compression nut (8), a compression structure and a plastic claw (10), wherein the inlet connector (1) is fixed on an explosion-proof shell through threads, the middle connector (5) is arranged in the middle of the inlet connector (1), and the second sealing ring (4) is arranged at a front end groove of the middle connector (5) close to the inlet connector (1); the inlet connector (1) is provided with a lining (3) on the inner side, the lining (3) is provided with a first sealing ring (2) towards one side of the end part of the cable in the inlet connector (1), and the first sealing ring (2) is in contact with the outer end face of the cable.

2. A cold flow and explosion proof cable joint as claimed in claim 1, wherein: the pressing structure is arranged on the inner side of the middle connector (5) and comprises a taper sleeve (6) and a pressing ring (7), the pressing ring (7) is arranged on the outer side of the taper sleeve (6), and the outer end face of the cable can be pressed by screwing the middle connector (5) to enable the taper sleeve (6) and the pressing ring (7).

3. A cold flow and explosion proof cable joint as claimed in claim 1, wherein: the plastic claw (10) is arranged at the head end of the inlet connector (1), and the plastic claw (10) is used for fixing the cable.

4. A cold flow and explosion proof cable joint as claimed in claim 1, wherein: the inner side of the plastic claw (10) is provided with a third sealing ring (9), the outer side of the plastic claw (10) is provided with a compression nut (8), the compression nut (8) can extrude the plastic claw (10) and the third sealing ring (9) when being screwed, and the outer sheath of the cable is compressed through the shrinkage deformation of the third sealing ring (9) so as to clamp and seal the cable.