CN209472240U - A double T-shaped insulating connection device for the installation of subway DC cabinets - Google Patents

Abstract

The utility model discloses a double T-shaped insulating connection device used for the installation of a subway DC cabinet, relates to the technical field of insulating connection, and comprises an insulating plate, on which a plurality of insulating supports are pierced, and the insulating supports include screws, nuts, Nut protection cap and two T-shaped insulators. The T-shaped insulator includes an insulating sleeve and an insulating disc. One end of the insulating sleeve is vertically arranged and fixedly connected to the surface of the insulating disc. The two insulating sleeves are arranged between the two insulating discs. , the screw rod is passed through two insulating sleeves and two insulating discs, its end is connected with a nut, and the nut is embedded in the nut protective cap. The connection and installation of the DC cabinet of the subway can be realized through the insulation connection device, and a good insulation effect can be achieved, and the installation is convenient.

Description

A double T-shaped insulating connection device for the installation of subway DC cabinets

technical field

The utility model relates to the technical field of insulation connection, in particular to a double T-shaped insulation connection device used for the installation of a subway DC cabinet.

Background technique

In the construction of urban transit rail, the safety of DC traction system is the basis for ensuring the safe and smooth operation of urban rail. At present, the frame protection method is usually adopted in the DC power supply system to monitor the insulation status between the positive pole of the DC power supply equipment and the grounded cabinet in real time to ensure the safety of the DC traction system. In order to ensure the safe operation of the track, it is necessary to ensure the insulation installation of the DC power supply equipment.

In the insulation installation in the prior art, a hard insulation board is usually arranged between the metal casing of the equipment and the basic channel steel to achieve insulation. The insulation board is usually made of epoxy resin or polycarbonate. The epoxy resin insulation board has high mechanical strength at high temperature, stable dielectric properties under high humidity, flame resistance, and good machinability; polycarbonate Ester insulation board has high mechanical strength, good dimensional stability, and stable dielectric properties under high humidity. However, in practical application, since the underground equipment room in the newly built subway project is extremely humid, the insulation installation of DC equipment simply through the hard insulation board will have poor insulation effect, and the insulation value often does not exceed the requirement of 1MΩ. And with the passage of time, the insulation effect is gradually reduced, affecting equipment and personal safety.

The insulation installation carried out by the above method requires many special measures before the equipment is electrified, such as dehumidifying the substation with a dehumidifier, blowing and drying the insulation board with a blower (hot air), etc., so as to barely ensure safe operation. However, as the running time prolongs, a lot of dust and metal particles will adhere to the gap between the insulating board and the switch cabinet, directly affecting the insulation of the DC equipment; in addition, the insulating board will gradually age with time, and its insulation performance will deteriorate Gradually reduce or even fail, resulting in equipment loss, personal injury, outage and other accidents, which will bring negative impact and loss on economic and social benefits.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a double T-shaped insulating connection device for the installation of the subway DC cabinet. The installation of the subway DC cabinet through the device can achieve a good insulation effect and is easy to install.

The purpose of this utility model is achieved through the following technical solutions:

A double T-shaped insulating connection device for the installation of subway DC cabinets, including an insulating plate, and a number of insulating supports are pierced on the insulating plate, and the insulating supports include screws, nuts, nut protection caps and two T shape insulation,

The T-shaped insulator includes an insulating sleeve and an insulating disk, one end of the insulating sleeve is vertically arranged and fixedly connected to the surface of the insulating disk, and the two insulating sleeves are arranged between the two insulating disks.

The screw rod is passed through the two insulating sleeves and the two insulating discs, and its end is connected with the nut, and the nut is embedded in the nut protective cap.

Further, the nut protective cap is made of insulating material.

Further, the insulating board is made of SMC material.

Further, it also includes the embedded channel steel and the bottom plate of the DC cabinet, the bottom plate of the DC cabinet, the insulating plate and the embedded channel steel are sequentially arranged in contact,

One of the insulating sleeves of the insulating support is passed through the bottom plate of the DC cabinet, the insulating plate connected to it is arranged in contact with the bottom plate of the DC cabinet, and the other insulating sleeve is passed through the insulating plate , the insulating disk connected to it is arranged in contact with the insulating plate.

Further, the insulating support also includes two insulating gaskets, one insulating gasket is arranged between the embedded channel steel and an insulating disk, and the other insulating gasket is arranged in the DC cabinet between the bottom plate and another insulating disc.

Further, spring washers and several flat washers are sheathed on the screw.

Further, high-strength insulating glue is applied to the contact parts of the insulating support, the bottom plate of the DC cabinet and the embedded channel steel.

Further, the specifications of the two T-shaped insulators may be the same or different.

Further, when the specifications of the two T-shaped insulators are different, they are respectively T-shaped insulator a and T-shaped insulator b, and the T-shaped insulator a includes an insulating sleeve a and an insulating disc fixedly connected at the ends, and the The T-shaped insulator b includes an insulating sleeve b and an insulating disc fixedly connected at the ends, the insulating sleeve b is arranged in the insulating sleeve a, and a sealing ring is arranged between the insulating sleeve b and the insulating sleeve a.

The beneficial effects of the utility model are:

The double T-shaped insulating connection device used for the installation of subway DC cabinets is provided with two T-shaped insulating parts, and the T-shaped insulating parts are moved closer to each other by using screws and nuts, so that they can clamp the bottom plate of the DC cabinet, the insulating plate and the embedded channel steel, Realize the connection and installation of the DC cabinet. At the same time, during installation, the bottom plate 4 of the DC cabinet is completely insulated from the embedded channel steel 3 through insulating plates, T-shaped insulating parts, nut protection caps and insulating glue, and the insulation value of the DC equipment installed through it is measured to reach 40MΩ , much higher than the insulation requirement of 1MΩ, its insulation effect is good, ensuring the safe and smooth operation of urban rail.

Description of drawings

Fig. 1 is a structural schematic diagram of a double T-shaped insulating connection device for the installation of a subway DC cabinet in the present invention;

Fig. 2 is a structural exploded schematic diagram of a T-shaped insulating part;

Fig. 3 is a schematic diagram of the installation of a double T-shaped insulating connection device for the installation of a subway DC cabinet in the present invention;

Fig. 4 is an installation schematic diagram of a preferred embodiment of a double T-shaped insulating connection device for installation of subway DC cabinets according to the present invention.

Detailed ways

The technical scheme of the utility model is further described in detail below in conjunction with the accompanying drawings, but the protection scope of the utility model is not limited to the following description.

As shown in FIG. 1 , a double T-shaped insulating connection device for the installation of a subway DC cabinet includes an insulating plate 1 and several insulating supports 2 . As shown in FIG. 2 , the insulating support 2 includes a screw 21 , a nut 22 , a nut protection cap 24 and two T-shaped insulating pieces 23 . The T-shaped insulator 23 is an integral molding made of insulating material, consisting of two parts: an insulating sleeve 232 and an insulating disc 231. One end of the insulating sleeve 232 is vertically arranged and fixedly connected to the surface of the insulating disc 231, so that the T-shaped insulator The axial section of the member 23 is T-shaped.

The T-shaped insulating connection device is used for insulating installation between the cabinet body of the subway DC cabinet and the basic channel steel, and its installation structure is shown in Figure 3. During specific implementation, the insulation board 1 is laid on the embedded channel steel 3, and the DC cabinet of the subway is installed on the insulation board 1. Drill installation holes together for the three-layer structure composed of the bottom plate 4 of the DC cabinet, the insulating board 1 and the embedded channel steel 3, and insert the insulating sleeve 232 of the T-shaped insulator 23 from both ends of the installation hole respectively, and make the two T-shaped The insulating disc 231 of the insulating member 23 is in contact with the bottom plate 4 of the DC cabinet and the embedded channel steel 3 respectively. Thereafter, the screw rod 21 passes through two T-shaped insulators 23 sequentially from one side of the embedded channel steel 3 , and connects the nut 22 at its passing end. By turning the nut 22, the two insulating discs 231 can be moved closer to each other until the connection between the bottom plate 4 of the DC cabinet, the insulating plate 1 and the embedded channel steel 3 is tightened.

Further, a protective nut cap 24 made of insulating material is provided at the end of the screw rod 21 protruding from the bottom plate 4 of the DC cabinet. The upper part of the nut protection cap 24 is insulated and closed, and the lower end is open. The nut 22 is embedded in the lower part of the nut protection cap, and makes the lower end of the nut protection cap 24 contact with an adjacent insulating disc 231 .

Further, the insulation board 1 is made of SMC composite material, which is mainly composed of special yarn, filler and various additives, and has excellent electrical insulation performance, mechanical performance, thermal stability and chemical corrosion resistance. Conventional epoxy resin or polycarbonate insulation boards have better insulation effect and longer service life.

Further, high-strength insulating glue is coated on the above-mentioned contact parts and between the two insulating sleeves 232 .

Through the above settings, the bottom plate 4 of the DC cabinet and the embedded channel steel 3 are completely insulated and separated by the insulating plate 1, the T-shaped insulator 23, the nut protection cap and the insulating glue, so that the connection can achieve a better insulating effect. In addition, when multiple DC cabinets are installed side by side, multiple sets of the insulating connection device can be selected, and the method of staggered installation can be used for installation. During installation, the gap between the bottom plates 4 of adjacent two DC cabinets is staggered from the gap between two adjacent insulating plates 1, and the above gaps are polished and bonded with insulating glue, and then pressed The installation structure shown in Figure 3 is installed. The insulation value of the DC equipment installed through the double T-shaped insulation connection device is greater than 40MΩ, which is much higher than the insulation requirement of 1MΩ. The insulation effect is good, ensuring the safe and smooth operation of urban rail.

In order to achieve mass production and reduce production costs, the above-mentioned T-shaped insulators 23 are generally produced uniformly, with the same specifications and dimensions. However, in actual use, it is necessary to control the size of the insulating sleeve 232 to avoid the connection between the DC cabinet and the channel steel being insufficiently tight due to its excessive length, which causes a gap between the two insulating sleeves 232 after installation. After long-term use, some Dust and metal particles enter this gap, which will reduce the insulation effect. Therefore, preferably, as shown in FIG. 4 , the specifications of the two T-shaped insulators are different, and they are T-shaped insulator a and T-shaped insulator b respectively. The T-shaped insulator a includes an insulating sleeve a233 and an insulating disc 231 whose ends are fixedly connected, and the T-shaped insulating member b includes an insulating sleeve b234 and an insulating disc 231 whose ends are fixedly connected. The diameter of the insulating sleeve b234 is smaller than that of the insulating sleeve a233. During installation, the insulating sleeve b234 is inserted into the insulating sleeve a233, and a sealing ring 235 is provided between the outer wall of the insulating sleeve b234 and the inner wall of the insulating sleeve a233. Through this setting, the gap between the insulating sleeve a233 and the insulating sleeve b234 is completely eliminated, so as to avoid the occurrence of degradation of insulation performance caused by long-term use.

Preferably, spring washers 7 and two flat washers 6 are sheathed on the screw 21, and insulating washers are provided between the embedded channel steel 3 and one insulating disc 231 and between the DC cabinet bottom plate 4 and another insulating disc 231 Sheet 5 can ensure that the two insulating disks 231 clamp and fasten the bottom plate 4 of the DC cabinet, the insulating plate 1 and the embedded channel steel 3 between them when the nut 22 is tightened. 22, the ability to loosen makes the connection between the bottom plate 4 of the DC cabinet and the embedded channel steel 3 through the insulating connection device stable and reliable.

The above descriptions are only preferred implementations of the present utility model, and it should be understood that the present utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments , and can be modified within the scope of the ideas described herein by the teachings above or by skill or knowledge in the relevant art. However, changes and changes made by those skilled in the art do not depart from the spirit and scope of the utility model, and should all be within the protection scope of the appended claims of the utility model.

Claims (9)

1. A double T-shaped insulating connection device for the installation of subway DC cabinets, characterized in that it includes an insulating plate (1), and several insulating supports (2) are pierced on the insulating plate (1). The insulating support (2) includes a screw (21), a nut (22), a nut protective cap (24) and two T-shaped insulating pieces (23), The T-shaped insulator includes an insulating sleeve (232) and an insulating disc (231). One end of the insulating sleeve (232) is vertically arranged and fixedly connected to the surface of the insulating disc (231). The two insulating sleeves (232) are arranged between the two insulating discs (231), The screw (21) passes through the two insulating sleeves (232) and the two insulating discs (231), and its end is connected with the nut (22), and the nut (22) is embedded in the inside the nut protection cap (24). 2. A double T-shaped insulating connection device for installation of subway DC cabinets according to claim 1, characterized in that the nut protection cap (24) is made of insulating materials. 3. A double T-shaped insulation connection device for installation of subway DC cabinets according to claim 1, characterized in that the insulation board (1) is made of SMC material. 4. A double T-shaped insulated connection device for the installation of subway DC cabinets according to claim 2, characterized in that it also includes embedded channel steel (3) and the bottom plate (4) of the DC cabinet, the DC cabinet The bottom plate (4), the insulating plate (1) and the embedded channel steel (3) are set in contact with each other in sequence, One of the insulating sleeves (232) of the insulating support (2) is passed through the bottom plate (4) of the DC cabinet, and the insulating disc (231) connected to it is arranged in contact with the bottom plate (4) of the DC cabinet , the other insulating sleeve (232) is penetrated in the insulating plate (1), and the insulating disc (231) connected with it is arranged in contact with the insulating plate (1). 5. A double T-shaped insulating connection device for the installation of subway DC cabinets according to claim 4, characterized in that, the insulating support (2) also includes two insulating gaskets (5), one of which is The insulating gasket (5) is arranged between the embedded channel steel (3) and an insulating disc (231), and the other insulating gasket (5) is arranged between the bottom plate (4) of the DC cabinet and the other between an insulating disc (231). 6. A double T-shaped insulating connection device for the installation of subway DC cabinets according to claim 4, characterized in that, the screw (21) is covered with spring washers (7) and several flat washers (6 ). 7. A double T-shaped insulating connection device for the installation of subway DC cabinets according to claim 4, characterized in that the insulating support (2) is connected to the bottom plate (4) of the DC cabinet and the embedded groove The contact parts of the steel (3) are coated with high-strength insulating glue. 8. A double T-shaped insulating connection device for the installation of subway DC cabinets according to any one of claims 1 to 7, characterized in that the specifications of the two T-shaped insulating parts (23) can be the same, Can be different. 9. A double T-shaped insulating connection device for the installation of subway DC cabinets according to claim 8, characterized in that the two T-shaped insulating parts (23) are T-shaped insulating parts a when the specifications are different and a T-shaped insulating piece b, the T-shaped insulating piece a includes an insulating sleeve a (233) and an insulating disc (231) whose ends are fixedly connected, and the T-shaped insulating piece b includes an insulating sleeve b ( 234) and an insulating disc (231), the insulating sleeve b (234) is set in the insulating sleeve a (233), and the insulating sleeve b (234) and the insulating sleeve a (233) are provided with Seal (235).