CN212627111U

CN212627111U - Cable joint protection device

Info

Publication number: CN212627111U
Application number: CN202021691544.4U
Authority: CN
Inventors: 蔡伟力
Original assignee: Henan Yugang Electric Power Engineering Co ltd
Current assignee: Henan Yugang Electric Power Engineering Co ltd
Priority date: 2020-08-13
Filing date: 2020-08-13
Publication date: 2021-02-26
Anticipated expiration: 2030-08-13

Abstract

A cable joint protection device comprises a joint box body, wherein a sleeve for sleeving a cable joint is arranged in the joint box body, two ends of the sleeve are provided with plugs, the plugs are provided with through holes for the cable to penetrate through, a spring is arranged in the joint box body, one end of the spring is abutted against one side of each plug, which is far away from the other plug, and the other end of the spring is abutted against the inner side wall of the joint box body; when the cable joint explodes, energy released by explosion acts on the spring through the plug and is consumed by the spring, and therefore pressure generated by impact of explosion on the joint box body is relieved.

Description

Cable joint protection device

Technical Field

The application relates to the field of cable equipment, in particular to a cable joint protection device.

Background

The cable joint is a power element for protecting the cable joint, and high-voltage electric arcs are easily caused by factors such as defective connection, bad environment of the cable joint and the like, so that accidents such as cable ignition, joint explosion and the like are caused, and the accidents easily cause harm to human body and property safety, so that the explosion resistance and the fire resistance are very important for the cable joint protection device.

For example, chinese patent publication No. CN103311872B discloses a protection box for an air bag type cable connector, which comprises a box body with an opening and an air bag covering the opening, wherein an aluminum foil is attached to the periphery of the opening to seal the opening when the gas in the box body is not expanded, and once the cable connector explodes, the instantaneously generated flame and electric arc can be released through the air bag.

In the technology, energy generated by explosion of the cable joint is released into the air bag, so that the pressure of the box body is reduced, but the air bag is easily aged and failed due to the influence of factors such as time and environment, and the anti-explosion effect is further influenced.

SUMMERY OF THE UTILITY MODEL

In order to improve the stability of antiknock function, this application provides a cable joint protection device.

The application provides a cable joint protection device adopts following technical scheme:

the utility model provides a cable joint protection device, includes the joint box body, be equipped with the sleeve pipe that is used for the cover to establish cable joint in the joint box body, the sleeve pipe both ends are equipped with the end cap, the end cap is equipped with the through-hole that the cable wore to establish, be equipped with the spring in the joint box body, spring one end with one side butt that another end cap was kept away from to the end cap, the spring other end with the inside wall butt of joint box body.

By adopting the technical scheme, the cable joint is positioned in a closed cavity formed by the sleeve and the plug, when the cable joint explodes, a large amount of energy is released in the forms of electric arc and flame to break the plug, the spring compresses, and the energy released by explosion is converted into the elastic potential energy of the spring, so that the pressure generated by the impact of the explosion on the joint box body is reduced; the durability of spring is better, and the spring is located the splice box body, connects the box body promptly and plays the guard action to the spring, can improve the life of spring, and then antiknock effect is more stable.

Preferably, the plug is attached to the end face of the sleeve, and the through hole is in clearance fit with the cable.

Through above-mentioned technical scheme, through-hole and cable clearance fit are favorable to making the end cap smoothly slide on the cable.

Preferably, the plug is provided with a plug head matched with the inner hole of the sleeve.

Through above-mentioned technical scheme, the choke plug is with the adaptation of sleeve pipe hole, is favorable to reducing because of choke plug and sleeve pipe along the condition emergence that radial dislocation appears the gap for the sleeve pipe both ends are sealed as far as possible completely.

Preferably, the plug is made of a heat resistant rubber material.

By adopting the technical scheme, the plug head is made of the heat-resistant rubber material, so that the matching tightness of the plug head and the sleeve can be improved; and in the process of opening the plug by explosion energy, the plug moves relative to the inner hole of the sleeve, and heat is generated by friction, so that part of the energy of explosion is converted into frictional heat energy, and the pressure generated by the impact of the explosion on the plug box body is further reduced.

Preferably, one side of the plug head close to the other plug head is provided with a conical groove.

Through above-mentioned technical scheme, when cable joint explodes, the energy that the explosion produced forms the effort on the groove face of the conical groove of chock plug, and the effort is decomposed into the power that makes the chock plug keep away from another chock plug and the radial force of keeping away from sleeve pipe axle center direction along the conical groove, and wherein radial force forces the chock plug to laminate the sleeve pipe hole more, increases the frictional force between chock plug and the sleeve pipe hole promptly to it is more to change frictional heat energy in the feasible explosion.

Preferably, the plug head is provided with a fillet.

Through adopting above-mentioned technical scheme, need not difficultly align when connecting chock plug and sleeve pipe, and the setting of fillet is favorable to the chock plug at both ends easily to insert the sleeve pipe hole when elasticity resets.

Preferably, two guide rods are fixedly arranged at two ends of the sleeve respectively, the axes of the guide rods are parallel to the axis of the sleeve, and the plug is provided with a guide hole for the guide rods to penetrate through and slide.

By adopting the technical scheme, the guide rod is matched with the guide hole, so that the plug can be ensured to be flushed along the path of the axis of the sleeve, namely, the moving path of the plug is corrected, and the plug can be continuously matched with the inner hole of the sleeve after being elastically reset conveniently.

Preferably, the joint box body is provided with an energy release hole, and the energy release hole is provided with a sealing plug.

By adopting the technical scheme, when energy generated by explosion is partially discharged through the plug and the spring and still has larger impact on the joint box body, the energy discharge hole can play a final protection role, and the sealing plug seals the energy discharge hole under the normal condition to keep the structural integrity in the joint box body.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the cable joint is positioned in a closed cavity formed by the sleeve and the plug, when the cable joint explodes to open the plug and compress the spring, energy released by explosion is converted into elastic potential energy, and thus pressure generated by impact on the joint box body is relieved; the durability of spring is better, and the spring is located the splice box body, receives the protection of splice box body, can improve life, and then antiknock effect is more stable.

2. The plug is made of heat-resistant rubber material, and when the energy generated by explosion rushes the plug, the plug moves relative to the inner hole of the sleeve, so that heat is generated by friction, and even if part of the energy generated by explosion is converted into heat energy by friction, the pressure generated by the impact of the explosion on the box body of the plug is further reduced.

Drawings

FIG. 1 is a schematic structural view of the overall structure of the present embodiment;

fig. 2 is a sectional view of the present embodiment for embodying the internal structure of the joint case.

Description of reference numerals: 1. a splice case; 11. a first housing; 12. a second housing; 13. a cable access cavity; 14. a vent hole; 2. a rubber gasket; 3. a rubber seal ring; 4. a sealing plug; 5. a fastener; 6. a sleeve; 61. a guide bar; 7, plugging the plug; 71. a through hole; 72. a plug head; 721. a tapered groove; 722. round corners; 73. a guide hole; 8. a spring; 9. a cable; 91. and (4) a cable joint.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses cable joint protection device. Referring to fig. 1 and 2, the connector comprises a first shell 11 and a second shell 12, wherein a rubber gasket 2 is arranged between the first shell 11 and the second shell 12, the first shell 11 and the second shell 12 are matched to form a connector box body 1, and the first shell 11 and the second shell 12 are connected and fixed through a fastener 5; two ends of the joint box body 1 are provided with cable access cavities 13 through which cables 9 can penetrate, and rubber sealing rings 3 are arranged between the cable access cavities 13 and the cables 9; the joint box body 1 is provided with an energy release hole 14, and the energy release hole 14 is provided with a sealing plug 4 made of silicon rubber material.

Referring to fig. 1 and 2, a sleeve 6 for sleeving a cable connector 91 is arranged in a connector box body 1, plugs 7 are arranged at two ends of the sleeve 6, the plugs 7 are attached to the end faces of the sleeve 6, a through hole 71 for the cable 9 to penetrate through is formed in each plug 72, the through hole 71 is in clearance fit with the cable 9, and therefore smooth sliding of each plug 72 on the cable 9 is facilitated, each plug 72 is provided with a plug 72 matched with an inner hole of the sleeve 6, each plug 72 is made of a heat-resistant rubber material, a round angle 722 is arranged on one side, matched with the sleeve 6, of each plug 72, and a conical groove 721 is formed in one side, close to the other plug; be equipped with spring 8 in the joint box body 1, spring 8 one end with another end cap 7 is kept away from to end cap 7 one side butt, the spring 8 other end with the inside wall butt that connects box body 1.

Two guide rods 61 are fixedly arranged at two ends of the sleeve 6 respectively, the axis of each guide rod 61 is parallel to that of the sleeve 6, the plug 7 is provided with a guide hole 73 matched with the guide rod 61, and the guide rods 61 and the guide holes 73 are matched to ensure that the plug 7 moves along the path of the axis of the sleeve 6.

During installation, the sleeve 6, the plug 7, the spring 8 and the rubber sealing ring 3 are prepared, the fittings are inserted into one of two cables 9 to be connected according to a certain sequence, then the two cables 9 are connected, then the sleeve 6 is sleeved on the cable connector 91, then the guide holes 73 of the two plugs 7 are aligned to the guide rods 61 at two ends of the sleeve 6, the two plugs 7 respectively penetrate through the guide rods 61, the plug 72 is matched with the inner hole of the sleeve 6, so that the end opening of the sleeve 6 is sealed by the plug 7, the cable connector 91 is confirmed to be positioned in a closed cavity formed by the sleeve 6 and the plug 7, then the spring 8 is placed on two sides of a combined piece formed by the sleeve 6 and the plug 7, then the first shell 11 and the second shell 12 are combined and packaged, and finally the first shell 11 and the second shell 12 are locked and connected through the fastener 5.

When the cable joint 91 explodes, a large amount of energy is released by the cable joint 91 in the form of electric arc and flame to impact a cavity formed by the sleeve 6 and the plug 7, so that the plug 7 is opened, the spring 8 is compressed, and the energy generated by explosion is converted into elastic potential energy of the spring 8, so that the pressure generated by the impact of the explosion on the joint box body 1 is reduced, the durability of the spring 8 is better, the spring 8 is positioned in the joint box body 1 and is protected by the joint box body 1, the service life can be prolonged, and the anti-explosion effect is more stable; in the process of exploding and opening the plug 7, energy generated by explosion acts on the groove surface of the conical groove 721 of the plug 72 to form acting force, the acting force is decomposed into force for enabling the plug 72 to be far away from the other plug 72 and radial force in the direction far away from the axis of the sleeve 6 along the groove surface of the conical groove 721, wherein the radial force enables the plug 72 to move relative to the inner hole of the sleeve 6 to generate large friction force, so that the energy generated by the explosion is converted into frictional heat energy, and the pressure generated by the impact of the explosion on the plug box body 1 is further reduced.

When the energy released by the cable joint 91 is too large, and the energy generated by explosion is partially discharged through the plug 7 and the spring 8, and still has a large impact on the joint box body 1, the energy leakage hole 14 can play a final protection role, and the sealing plug 4 normally seals the energy leakage hole 14 to keep the structural integrity of the joint box body 1.

The above embodiments are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a cable joint protection device, is including connecting box body (1), its characterized in that, be equipped with in the joint box body (1) and be used for the cover to establish sleeve pipe (6) of cable joint (91), sleeve pipe (6) both ends are equipped with end cap (7), end cap (7) are equipped with through-hole (71) that power supply cable (9) were worn to establish, be equipped with spring (8) in the joint box body (1), spring (8) one end with one side butt that another end cap (7) was kept away from in end cap (7), the spring (8) other end with the inside wall butt that connects box body (1).

2. A cable splice protection device according to claim 1, further comprising: the plug (7) is attached to the end face of the sleeve (6), and the through hole (71) is in clearance fit with the cable (9).

3. A cable splice protection device according to claim 2, wherein: the plug (7) is provided with a plug head (72) matched with the inner hole of the sleeve (6).

4. A cable splice protection device according to claim 3, wherein: the plug head (72) is made of a heat-resistant rubber material.

5. A cable splice protection device according to claim 4, further comprising: one side of the plug head (72) close to the other plug head (72) is provided with a conical groove (721).

6. A cable splice protection device according to claim 5, in which: the plug head (72) is provided with a round angle (722).

7. A cable splice protection device according to claim 6, wherein: two guide rods (61) are fixedly arranged at two ends of the sleeve (6) respectively, the axis of each guide rod (61) is parallel to that of the sleeve (6), and the plug (7) is provided with a guide hole (73) for the guide rods (61) to penetrate through and slide.

8. A cable splice protection device according to claim 1, further comprising: the joint box body (1) is provided with an energy release hole (14), and the energy release hole (14) is provided with a sealing plug (4).