CN209642282U - High-voltage cable intermediate head protection device with pressure relief hole - Google Patents

Abstract

The embodiment of the utility model discloses a high-voltage cable intermediate joint protection device with a pressure relief hole, which includes: a lower shell, the lower side of which is closed, the upper side is open, and the left and right sides respectively extend the first flange edge; The upper side of the casing is closed, the lower side is open, and the left and right sides respectively extend the second flange edge, the second flange edge is aligned with the first flange edge of the lower casing and fixed by bolts, so that The two ends of the lower shell and the upper shell are respectively formed with through holes for the cables at the ends of the high-voltage cable intermediate joints to pass through; the two ends of the lower shell and the upper shell are formed with a plurality of holes around the through holes. A first pressure relief hole; at least one row of second pressure relief holes is formed inside the lower casing. By implementing the embodiment of the utility model, the middle joint of the high-voltage cable can be protected, and its safety can be improved.

Description

A high-voltage cable intermediate joint protection device with a pressure relief hole

technical field

The utility model relates to the field of high-voltage cable intermediate joints, in particular to a high-voltage cable intermediate joint protection device with pressure relief holes.

Background technique

High-voltage cables are an important part of the power system, and their main purpose is to transmit energy. When the high-voltage cable is laid for a long length, it is necessary to use the cable intermediate head for connection, and the connection of the cable intermediate head is generally carried out at the cable laying site.

Due to the manufacturing and installation defects of the middle head of the high-voltage cable, the probability of short-circuit breakdown during the operation of the middle head of the high-voltage cable is much higher than that of the cable body. In addition, the middle joint of the high-voltage cable is mostly made of polymer flexible materials, which have good insulation and waterproof performance, but The mechanical strength is low. Due to the huge energy of the power system, once the middle head of the high-voltage cable fails, it is easy to catch fire and explode, posing a threat to public safety.

Utility model content

The technical problem to be solved by the utility model is to provide a high-voltage cable intermediate joint protection device with a pressure relief hole for the power supply network, to provide additional protection for the high-voltage cable intermediate joint, and to perform pressure relief in case of failure.

In order to solve the above technical problems, an embodiment of the present invention provides a high-voltage cable intermediate joint protection device with a pressure relief hole, which includes:

The lower casing has a baffle at the middle of the interior, and the baffle divides the interior of the lower casing into two vertical spaces for accommodating the intermediate joints of high-voltage cables, and the first flanges extend from the left and right sides respectively. ;

The upper shell has a baffle in the middle of it, and the baffle divides the upper shell into two vertical spaces for accommodating the middle joint of the high-voltage cable, and the left and right sides respectively extend the second flange , the second flange is aligned with the first flange of the lower casing and fixed by bolts;

The two ends of the lower shell and the upper shell are respectively formed with through holes for the cables at the ends of the intermediate joints of the high-voltage cables to pass through;

The two ends of the lower shell and the upper shell are formed with a plurality of first pressure relief holes around the through hole;

At least one row of second pressure relief holes is formed inside the lower casing.

Preferably, the lower casing and the upper casing are made of stainless steel.

Implementation of the utility model embodiment has the following beneficial effects:

The utility model adopts the combined structure of the lower shell and the upper shell, which can form two independent compartments to accommodate two cables respectively; it adopts stainless steel material, which can improve the strength of the protective shell;

At the same time, the accommodating space is divided into two relatively independent parts, which can achieve better fault protection capabilities, and when one of the intermediate cable joints fails, it will not affect the other intermediate cable joint.

In addition, a plurality of first pressure relief holes are provided at the ends of the lower casing and the upper casing, and at least one row of second pressure relief holes is formed inside the lower casing, which can prevent failure of the cable intermediate joint. Rapid pressure relief to prevent explosions.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative work.

Fig. 1 is a schematic diagram of the structure of a high-voltage cable intermediate joint protection device with a pressure relief hole and the cable intermediate head provided by the utility model;

Fig. 2 is a schematic diagram of the structure after removing the upper shell in Fig. 1;

Fig. 3 is a schematic structural view of the lower case in Fig. 2 .

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Here, it should also be noted that, in order to avoid obscuring the utility model due to unnecessary details, only the structures and/or processing steps closely related to the solution according to the utility model are shown in the drawings, and the Other details that have little relationship with the utility model are described.

As shown in Figure 1, it is a structural schematic diagram of the cooperation between a high-voltage cable intermediate joint protection device with a pressure relief hole provided by the utility model and the cable intermediate head; combined with Figure 2 to Figure 3. In an embodiment of the present utility model, the high-voltage cable intermediate joint protection device with a pressure relief hole for the power supply network includes:

The lower casing 1 has a baffle 11 formed in the middle of the interior, and the baffle 11 divides the interior of the lower casing 1 into two vertical spaces for accommodating the middle joint 4 of the high-voltage cable, and the left and right sides respectively extend out the first flange 10;

The upper shell 2 has a baffle (not shown, the same structure as the baffle 11) in the middle of the upper shell 2, and the baffle divides the upper shell 2 into two for accommodating the middle joint 4 of the high-voltage cable. In the vertical space, second flanges 20 extend from the left and right sides respectively, and the second flanges 20 are aligned with the first flange 10 of the lower casing 1 and fixed by bolts 6; it can be understood that , a plurality of bolt holes are provided on the first flange 10 and the second flange 20, the figure shows the bolt holes 100 on the first flange 10;

Both ends of the lower housing 1 and the upper housing 2 are respectively formed with through holes for the cables at the ends of the high-voltage cable intermediate connector 4 to pass through;

More specifically, a plurality of first pressure relief holes 7 are formed around the through holes at both ends of the lower casing 1 and the upper casing 2;

At least one row of second pressure relief holes 8 is formed inside the lower casing 1 , two rows are shown in the figure.

Wherein, an accommodating space is formed between the upper case 2 and the lower case 1 for accommodating two high-voltage cable intermediate joints 4 placed side by side; wherein, the lower case 1 and the upper case 2 are made of stainless steel material, in one example, both the upper casing 2 and the lower casing 1 can be made by casting or milling, wherein the thickness of the casing can reach 15mm, which has strong anti-knock strength;

In addition, the two ends of the lower casing 2 and the upper casing 1 are respectively formed with through holes for the cables 5 at the ends of the high-voltage cable intermediate joints 4 to pass through. In one example, the cables 5 can be 110kV cables , the high-voltage cable intermediate connector 4 may be a 110kV cable intermediate connector. After the upper case 2 and the lower case 1 are installed and fixed, a closed space is formed between the upper case 2 , the lower case 1 and the cable 5 to prevent arcs and fragments from flying out.

It can be understood that when one of the cable intermediate heads 4 fails, the fault arc and fault gas will leak outwards along the first pressure relief hole 7 and the second pressure relief hole 8, which will not cause the other cable intermediate head 4 to leak at the same time. damaged.

Implementation of the utility model embodiment has the following beneficial effects:

The utility model adopts the combined structure of the lower shell and the upper shell, which can form two independent compartments to accommodate two cables respectively; it adopts stainless steel material, which can improve the strength of the protective shell;

At the same time, the accommodating space is divided into two relatively independent parts, which can achieve better fault protection capabilities, and when one of the intermediate cable joints fails, it will not affect the other intermediate cable joint.

In addition, a plurality of first pressure relief holes are provided at the ends of the lower casing and the upper casing, and at least one row of second pressure relief holes is formed inside the lower casing, which can prevent failure of the cable intermediate joint. Rapid pressure relief to prevent explosions.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is a relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The above description is only the specific implementation of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, some improvements and modifications can also be made. It should be regarded as the protection scope of this application.

Claims (2)

1. A high-voltage cable intermediate joint protection device with a pressure relief hole, characterized in that it includes: The lower casing has a baffle at the middle of the interior, and the baffle divides the interior of the lower casing into two vertical spaces for accommodating the intermediate joints of high-voltage cables, and the first flanges extend from the left and right sides respectively. ; The upper shell has a baffle in the middle of it, and the baffle divides the upper shell into two vertical spaces for accommodating the middle joint of the high-voltage cable, and the left and right sides respectively extend the second flange , the second flange is aligned with the first flange of the lower casing and fixed by bolts; The two ends of the lower shell and the upper shell are respectively formed with through holes for the cables at the ends of the intermediate joints of the high-voltage cables to pass through; The two ends of the lower shell and the upper shell are formed with a plurality of first pressure relief holes around the through hole; At least one row of second pressure relief holes is formed inside the lower casing. 2. A high-voltage cable intermediate joint protection device with a pressure relief hole according to claim 1, wherein the lower casing and the upper casing are made of stainless steel.