A dehumidifying device for incoming line of an explosion-proof switch

Abstract

The utility model belongs to the dehumidification technical field of mining equipment especially, and is a dehumidification device for incoming line side of explosion-proof switch, including machine body, the machine body outside is equipped with switch body, the machine body outside fixedly connected with the protection cover, the protection cover inside with high pressure chamber of machine body intercommunication, the protection cover has drying zone inside, the protection cover outside is wound with electric heat -tracing band body, electric heat -tracing band body includes outside extension section and inside stretch into section, in the incoming line side, outgoing line side outside winding electric heat -tracing band of explosion -proof switch, the high pressure chamber is forced to heat dehumidification, the moisture and humidity of drying cable head place, improve the insulation degree of high voltage cable joint, outside extension section corresponds at the position of drying zone, inside stretch into section corresponds at switch body wiring position, the incoming line side, outgoing line side of each middle section explosion -proof switch equipment of air intake well is added electric heat -tracing band, forced heating drying, reduce the humidity of high pressure chamber, avoid the large -scale power failure caused by the wetness and lead to the electric creep, short -circuit failure.

Description

Technical Field

[0001] This utility model belongs to the field of dehumidification technology for mining equipment, specifically relating to a dehumidification device for the incoming line side of an explosion-proof switch. Background Technology

[0002] The explosion-proof vacuum feeder switch for mining is an explosion-proof industrial device suitable for methane-containing explosive gas environments in underground coal mines. The electric heating tape consists of a conductive polymer, two parallel metal wires, and an insulating sheath. Its key feature is that the conductive polymer has a high positive temperature coefficient, and the wires are connected in parallel, allowing for automatic adjustment of output power according to temperature changes in the heated system. It automatically limits the heating temperature, can be cut to any length or extended within a certain range, and allows for multiple overlaps without the risk of hot spots or burnout.

[0003] The explosion-proof switch of the air intake shaft is a temporary high-voltage facility used during the well operation. Due to the high humidity and high salt environment on site, and the fact that the high-voltage cable used is a hard-core high-voltage cable with poor sealing, moisture enters the interior and affects the discharge between the high-voltage insulator and the cable head, causing equipment power outage failure. Utility Model Content

[0004] This utility model provides a dehumidification device for the incoming line side of an explosion-proof switch. It features an external extension section corresponding to the position of the drying zone and an internal extension section corresponding to the wiring position of the switch body. Electric heating tapes are installed on the incoming and outgoing lines of each section of the explosion-proof switch equipment in the air intake shaft for forced heating and drying, thereby reducing the humidity in the high-voltage chamber and avoiding large-scale power outages caused by creepage and short circuit faults due to humidity.

[0005] This utility model provides the following technical solution: a dehumidification device for the inlet side of an explosion-proof switch, comprising a body, a switch body on the outside of the body, a protective cover fixedly connected to the outside of the body, the inside of the protective cover being connected to the high-voltage chamber of the body, a drying zone inside the protective cover, and an electric heating tape wrapped around the outside of the protective cover, the electric heating tape comprising an outer extension section and an inner insertion section, one end of the inner insertion section being located outside the inlet side of the switch body, for drying moisture and humidity at the cable head.

[0006] The protective cover has an annular groove, and the outer extension is located inside the annular groove.

[0007] A sealing shell is fixedly connected to the outside of the machine body, and the sealing shell is located outside the switch body.

[0008] The sealing shell has a sealing cavity, and the internal extension section is located inside the sealing cavity.

[0009] The internal extension section is connected at one end to the external extension section, and the internal extension section is located inside the body.

[0010] The diameter of the outer extension is twice the diameter of the inner extension, and the outer extension and the inner extension are integrally formed.

[0011] One end of the internal extension section is located on the outer side of the outlet side of the switch body to dry the moisture and humidity at the cable head.

[0012] The beneficial effects of this utility model are: By wrapping an electric heating tape around the outside of the protective cover, which includes an outer extension section and an inner extension section, the high-voltage chamber is forcibly heated and dehumidified on the incoming and outgoing sides of the explosion-proof switch. This dries the moisture and humidity at the cable heads, improving the dryness of the cable heads and the insulation of the high-voltage cable joints. The outer extension section corresponds to the drying area, and the inner extension section corresponds to the wiring position of the switch body. Electric heating tapes are installed on the incoming and outgoing sides of each section of the explosion-proof switch equipment in the air intake shaft for forced heating and drying, reducing the humidity of the high-voltage chamber and preventing large-scale power outages caused by creepage and short circuit faults due to moisture.

[0013] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is the front view of the present invention; Figure 3 This is a top view of the present invention; Figure 4 This is a schematic diagram of the internal extension section in this utility model; In the diagram: 1. Main body; 11. Protective cover; 111. Drying area; 12. Switch body; 2. Electric heating cable; 21. External extension section; 22. Internal extension section; 3. Sealing shell; 31. Sealing cavity. Detailed Implementation

[0015] Please see Figures 1-4 The present invention provides the following technical solution: it includes a body 1, a switch body 12 on the outside of the body 1, a protective cover 11 fixedly connected to the outside of the body 1, the inside of the protective cover 11 being connected to the high-voltage chamber of the body 1, a drying zone 111 inside the protective cover 11, and an electric heating tape 2 wrapped around the outside of the protective cover 11. The electric heating tape 2 includes an outer extension section 21 and an inner extension section 22. One end of the inner extension section 22 is located outside the inlet side of the switch body 12 to dry the moisture and humidity at the cable head.

[0016] In this implementation scheme: A protective cover 11 is fixedly connected to the outside of the main body 1. The inside of the protective cover 11 is connected to the high-voltage chamber of the main body 1. The protective cover 11 has a drying zone 111, which isolates the external humid environment. An electric heating tape 2 is wrapped around the outside of the protective cover 11. The electric heating tape 2 is 36V and includes an external extension section 21 and an internal insertion section 22. One end of the internal insertion section 22 is located outside the inlet side of the switch body 12 to dry the moisture at the cable head. The electric heating tape 2 is wrapped around the outside of the inlet and outlet sides of the explosion-proof switch to force heating and dehumidify the high-voltage chamber, dry the moisture at the cable head, improve the dryness of the cable head during operation, and improve the insulation of the high-voltage cable joint. One end of the internal insertion section 22 is connected to the external extension section 21. The internal insertion section 22 is located inside the main body 1. The diameter of the extension section 21 is twice the diameter of the inner extension section 22. The outer extension section 21 and the inner extension section 22 are integrally formed. One end of the inner extension section 22 is located outside the outlet side of the switch body 12 to dry the moisture and humidity at the cable head. The inner extension section 22 acts on the wiring position of the switch body 12 inside the machine body 1. By limiting the diameter, it is convenient to output a suitable temperature on the inlet side. With the outer extension section 21 corresponding to the position of the drying zone 111 and the inner extension section 22 corresponding to the wiring position of the switch body 12, electric heating tape 2 is installed on the inlet and outlet sides of the explosion-proof switch equipment in each section of the air intake shaft for forced heating and drying, reducing the humidity of the high-voltage chamber, avoiding large-scale power outages caused by creepage and short circuit faults due to humidity, solving the problem of explosion-proof switches being affected by humid air, and reducing the failure rate of the high-voltage power supply and distribution system in the air intake shaft.

[0017] The protective cover 11 has an annular groove, and the outer extension section 21 is located inside the annular groove; with the cooperation of the annular groove, it is convenient to install the outer section of the electric heating cable 2.

[0018] A sealing shell 3 is fixedly connected to the outside of the main body 1. The sealing shell 3 is located outside the switch body 12. The sealing shell 3 has a sealing cavity 31, and the internal extension section 22 is located inside the sealing cavity 31. The sealing shell 3 allows the electric heating cable 2 to extend into the interior. Under the action of the sealing cavity 31, a section of the electric heating cable 2 is surrounded, so that this section can be used alone.

[0019] One end of the internal extension section 22 is connected to the external extension section 21. The internal extension section 22 is located inside the body 1. The diameter of the external extension section 21 is twice the diameter of the internal extension section 22. The external extension section 21 and the internal extension section 22 are integrally formed. One end of the internal extension section 22 is located outside the outlet side of the switch body 12 to dry the moisture and humidity at the cable head. The external extension section 21 and the internal extension section 22 are integrally connected or connected through a connector. The internal extension section 22 acts at the wiring position of the switch body 12 inside the body 1. By limiting the diameter, it is convenient to output a suitable temperature on the inlet side. The internal extension section 22 corresponds to the wiring position of the switch body 12. Electric heating tape 2 is installed on the inlet and outlet sides of the explosion-proof switch equipment in each section of the air intake shaft for forced heating and drying.

[0020] The working principle and usage process of this utility model are as follows: An electric heating tape 2 is wrapped around the outside of the protective cover 11. One end of the internal extension section 22 is located on the outside of the inlet side of the switch body 12 to dry the moisture and humidity at the cable head. The electric heating tape 2 is wrapped around the outside of the inlet and outlet sides of the explosion-proof switch to force heating and dehumidify the high-voltage chamber, drying the moisture and humidity at the cable head, improving the dryness of the cable head during operation, and improving the insulation of the high-voltage cable joint. One end of the internal extension section 22 is connected to the external extension section 21. The external extension section 21 and the internal extension section 22 are integrally formed. One end of the internal extension section 22 is located on the outside of the outlet side of the switch body 12 to dry the cable head. The moisture and humidity at the cable head are reduced. The internal extension section 22 acts on the wiring position of the switch body 12 inside the machine body 1. By limiting the diameter, it is easy to output a suitable temperature on the incoming side. With the external extension section 21 corresponding to the position of the drying zone 111 and the internal extension section 22 corresponding to the wiring position of the switch body 12, electric heating tape 2 is installed on the incoming and outgoing sides of the explosion-proof switch equipment in each section of the air intake shaft. Forced heating and drying reduce the humidity of the high-voltage chamber and avoid large-scale power outages caused by creepage and short circuit faults due to moisture. This solves the problem of explosion-proof switches being affected by humid air and reduces the failure rate of the high-voltage power supply and distribution system in the air intake shaft.

Claims

1. A dehumidification device for the incoming line side of an explosion-proof switch, comprising a body (1), wherein a switch body (12) is provided on the outer side of the body (1), characterized in that: A protective cover (11) is fixedly connected to the outside of the body (1). The inside of the protective cover (11) is connected to the high-voltage chamber of the body (1). The protective cover (11) has a drying area (111). An electric heating tape (2) is wrapped around the outside of the protective cover (11). The electric heating tape (2) includes an outer extension section (21) and an inner extension section (22). One end of the inner extension section (22) is located outside the inlet side of the switch body (12) to dry the moisture and humidity at the cable head.

2. The explosion-proof switch incoming line dehumidification device according to claim 1, characterized in that: The protective cover (11) has an annular groove, and the outer extension (21) is located inside the annular groove.

3. The explosion-proof switch incoming line dehumidification device according to claim 1, characterized in that: A sealing shell (3) is fixedly connected to the outside of the body (1), and the sealing shell (3) is located outside the switch body (12).

4. The explosion-proof switch incoming line dehumidification device according to claim 3, characterized in that: The sealing shell (3) has a sealing cavity (31), and the internal extension section (22) is located inside the sealing cavity (31).

5. The explosion-proof switch incoming line dehumidification device according to claim 1, characterized in that: One end of the internal extension section (22) is connected to the external extension section (21), and the internal extension section (22) is located inside the body (1).

6. The explosion-proof switch incoming line dehumidification device according to claim 1, characterized in that: The diameter of the outer extension section (21) is twice the diameter of the inner extension section (22), and the outer extension section (21) and the inner extension section (22) are integrally formed.

7. The explosion-proof switch incoming line dehumidification device according to claim 1, characterized in that: One end of the internal extension section (22) is located outside the cable outlet side of the switch body (12) to dry the moisture and humidity at the cable head.

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