CN110601122A - Cable trench for prefabricated substation - Google Patents

Abstract

The invention discloses a cable trench for a prefabricated substation, which includes a body, and the interior of the body is provided with an arc barrier, and the arc barrier divides the inner cavity of the body into a first groove body and a first groove body. The second tank body, the first tank body corresponds to the high-voltage cabinet of the prefabricated substation, and the second tank body corresponds to the low-voltage cabinet of the prefabricated substation. Or when the arc is ignited in the cable compartment, the arc light and pressure will rush into the first tank of the cable trench instantly, and then enter the second tank after passing through the arc barrier, and the arc barrier can effectively prevent the arc light and pressure from going to the box transformer. The release of the low-pressure side effectively reduces the backwash pressure on the low-voltage cabinet, thus ensuring the safety of the operators on the low-voltage side.

Description

A kind of cable trench for prefabricated substation

technical field

The invention relates to the technical field of substations, in particular to a cable trench for a prefabricated substation.

Background technique

Box-type transformer (referred to as box-type transformer) is a kind of high-voltage switchgear, distribution transformer and low-voltage power distribution device, etc., which are arranged in one according to a certain layout plan, and are prefabricated indoor and outdoor compact power distribution equipment. Box-type substations are further divided into European substations (referred to as European substations) and American-style box substations (abbreviated as American substations). Among them, American substations are widely used because of their small size, small footprint, and easy installation. However, in recent years, American transformers have been gradually replaced by European transformers due to their shortcomings such as low power supply reliability and incapability of capacity expansion and transformation. Moreover, in order to be able to use the original American transformers to install civil works, alternative prefabricated substations should be used However, the alternative prefabricated substation is essentially a European substation, which is smaller in size and more compact than the conventional European substation, and can be installed on the original foundation of the American substation.

However, the prefabricated substation uses the original American substation foundation and high and low voltage cables. The foundation width is generally about 400-650mm, and the depth is generally 1000mm. It is smaller than the foundation of the conventional European substation. Moreover, since the original low-voltage cables have been laid and formed, the angle and size of entering the foundation of the box-type substation can hardly be changed. Therefore, when arcing occurs in the gas box or cable compartment in the high-voltage cabinet of the prefabricated substation, the arc light and pressure will rush into the cable trench instantly, and then enter the low-voltage cabinet through the cable trench. Smaller than conventional European transformers, the arc light and pressure entering the low-voltage cabinet will still be very strong. If the arc light rushes into the low-voltage cabinet with the pressure and breaks through the door of the low-voltage cabinet, it may cause a greater safety hazard to the low-voltage operators.

Contents of the invention

In order to overcome the deficiencies of the prior art, the technical problem solved by the present invention is to provide a cable trench for a prefabricated substation, which can reduce the backflushing pressure on the low-voltage cabinet and ensure the safety of operators on the low-voltage side.

In order to solve the problems of the technologies described above, the content of the technical solution adopted in the present invention is specifically as follows:

A cable trench for a prefabricated substation, comprising a body, the interior of the body is provided with an arc barrier, and the arc barrier divides the inner cavity of the body into a first slot body and a second slot body , the first tank corresponds to the high-voltage cabinet of the prefabricated substation, and the second tank corresponds to the low-voltage cabinet of the prefabricated substation.

As a preference of the above solution, the arc-interval grid is a stainless steel plate, and several grid holes are uniformly arranged on the arc-intervention grid.

As a preference of the above solution, the surface of the stainless steel is provided with a plating layer, and the material of the plating layer is copper.

Compared with prior art, the beneficial effect of the present invention is:

The invention discloses a cable trench for a prefabricated substation, which includes a body, and the interior of the body is provided with an arc barrier, and the arc barrier divides the inner cavity of the body into a first groove body and a first groove body. The second tank body, the first tank body corresponds to the high-voltage cabinet of the prefabricated substation, and the second tank body corresponds to the low-voltage cabinet of the prefabricated substation. Or when the arc is ignited in the cable compartment, the arc light and pressure will rush into the first tank of the cable trench instantly, and then enter the second tank after passing through the arc barrier, and the arc barrier can effectively prevent the arc light and pressure from going to the box transformer. The release of the low-pressure side effectively reduces the backwash pressure on the low-voltage cabinet, thereby ensuring the safety of the operators on the low-voltage side.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the following preferred embodiments are specifically cited below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is a schematic structural view of a cable trench for a prefabricated substation according to the present invention;

Fig. 2 is a schematic structural diagram of the arc grid in Fig. 1;

Wherein, the reference numerals in Fig. 1 and Fig. 2 are:

1. High voltage cabinet; 2. Low voltage cabinet; 3. Body; 4. First tank; 5. Second tank; 6. Arc barrier; 7. Grid hole.

Detailed ways

In order to further elaborate the technical means and effects that the present invention adopts for reaching the intended invention purpose, below in conjunction with the accompanying drawings and preferred embodiments, the specific implementation, structure, features and effects of the present invention are described in detail as follows:

As shown in Figure 1, the present invention discloses a cable trench for a prefabricated substation, including a body 3, an arc barrier 6 is arranged inside the body 3, and the arc barrier 6 connects the body 3 The internal cavity of the tank is divided into a first tank body 4 and a second tank body 5, the first tank body 4 corresponds to the high-voltage cabinet 1 of the prefabricated substation, and the second tank body 5 corresponds to the prefabricated substation It corresponds to the low-voltage cabinet 2 of the installed substation.

Since the arc barrier 6 can effectively weaken the release of arc light and pressure to the low-voltage side of the box transformer, the arc barrier 6 can effectively reduce the backlash pressure on the low-voltage cabinet 2, thereby ensuring the safety of the operators on the low-voltage side .

As shown in FIG. 2 , the arc grid 6 is a stainless steel plate, and several grid holes 7 are uniformly arranged on the arc grid 6 . Because stainless steel has the advantages of good hardness and high mechanical strength, the arc barrier 6 can withstand the pressure released when the high-voltage cabinet 1 arcs; moreover, when the arc light released by the high-voltage cabinet 1 passes through the arc grid , the grid hole 7 can divide the arc released when the high-voltage cabinet 1 arcs into many short arcs. The energy and destructive power of the arc light of the second tank body 5 further reduces the harm and destructive power of the arc light to the low-voltage cabinet 2, that is, the discharge of the arc light and pressure to the low-voltage side of the box transformer can be effectively prevented by the arc barrier 6, effectively reducing the The backwash pressure of the low-voltage cabinet 2 is ensured, thereby ensuring the safety of the operators on the low-voltage side.

In order to improve the arc-breaking effect of the arc-break grid 6 , the surface of the stainless steel is provided with a plating layer, and the material of the plating layer is copper, because copper has better conductivity and can attract electric arcs.

The above-mentioned embodiment is only a preferred embodiment of the present invention, and cannot be used to limit the protection scope of the present invention. Any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the scope of the present invention. Scope of protection claimed.

Claims (3)

1. A cable trench for a prefabricated substation, characterized in that: it includes a body, the interior of the body is provided with an arc barrier, and the arc barrier divides the inner cavity of the body into a first slot body and a second tank body, the first tank body corresponds to the high-voltage cabinet of the prefabricated substation, and the second tank body corresponds to the low-voltage cabinet of the prefabricated substation. 2. The cable trench for prefabricated substation according to claim 1, characterized in that: the arc-break grid is made of stainless steel plate, and several grid holes are uniformly arranged on the arc-break grid. 3. The cable trench for a prefabricated substation according to claim 2, characterized in that: the surface of the stainless steel is provided with a coating, and the material of the coating is copper.