Portable plug-in explosion-proof cable head structure

Abstract

The utility model relates to the technical field of cables, and discloses a portable plug type explosion-proof cable head structure which comprises a power cable, the left end of the power cable is fixedly connected with a sealing gasket, the left side of the sealing gasket is fixedly connected with a first sealing ring, and the power cable penetrates through the sealing gasket and is fixedly connected with the first sealing ring. The outer wall of the first sealing ring is fixedly connected with an insulating socket, the outer side of the insulating socket is fixedly connected with a locking sleeve, the outer wall of the locking sleeve is fixedly connected with a flange shell, and sealant is arranged in the flange shell. According to the utility model, the use of the high-voltage high-power submersible motor is met, the installation is fast and safe, the transportation is convenient, the explosion-proof motor can be used in an explosion-proof environment, the structure is safe and reliable, and the problems that the explosion-proof requirement cannot be met and the explosion-proof motor cannot be used in the explosion-proof environment are solved. And a high-voltage and high-power cable head cannot meet the requirements of large enough creepage distance and high enough insulation.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a portable pluggable explosion-proof cable head structure. Background Art

[0002] A cable is a wire product used to transmit electrical energy, signals or realize electromagnetic energy conversion. It is usually composed of one or more insulated wires and then covered with a protective layer. The conductor of the cable has good conductivity and can effectively transmit electrical energy and reduce energy loss.

[0003] Explosion-proof cable heads are used in some special environments. They are cable connection devices used in potentially explosive environments. They have a special design and structure that can effectively prevent sparks, arcs and other dangerous factors from occurring at cable connection points, thereby ensuring electrical safety in flammable and explosive locations.

[0004] The existing technology uses a portable plug-in explosion-proof cable head structure, which has special explosion-proof measures in the structural design. When a fault or abnormal situation occurs inside the cable system, the sparks, arcs and other energy generated are limited to the inside of the cable head and will not cause an explosion in the external environment, which greatly ensures the safety of personnel and equipment. However, conventional submersible motor cable heads not only fail to meet the explosion-proof requirements and cannot be used in explosive environments, but also for high-voltage and high-power submersible motors, the cable heads do not meet the requirements of sufficiently large creepage distance and sufficiently high insulation. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a portable pluggable explosion-proof cable head structure, which aims to improve the problems in the existing technology that the explosion-proof requirements cannot be met and cannot be used in explosive environments, and the high-voltage and high-power cable heads do not meet the requirements of sufficiently large creepage distance and sufficiently high insulation.

[0006] In order to achieve the above-mentioned purpose, the present utility model adopts the following technical solution: a portable pluggable explosion-proof cable head structure, including a power cable, the left end of the power cable is fixedly connected to a sealing gasket, the left side of the sealing gasket is fixedly connected to a sealing ring 1, the power cable passes through the sealing gasket and is fixedly connected to the sealing ring 1, the outer wall of the sealing ring 1 is fixedly connected to an insulating socket, the outer side of the insulating socket is fixedly connected to a locking sleeve, the outer wall of the locking sleeve is fixedly connected to a flange shell, the interior of the flange shell is provided with sealant, and the left end of the power cable is fixedly connected to a plug.

[0007] As a further description of the above technical solution:

[0008] A motor end cover is provided on the left side of the power cable, a lead wire is fixedly connected to the inside of the motor end cover, an insulating base is provided on the outer wall of the lead wire, a connector is fixedly connected to the right end of the lead wire, a socket 1 is fixedly connected to the right side of the connector, the socket 1 is electrically connected to the plug of the power cable, a positioning plate is fixedly connected to the outside of the insulating base, and an insulating tube is fixedly connected to the outside of the socket 1.

[0009] As a further description of the above technical solution:

[0010] The left end of the flange housing is provided with an O-type rubber sealing ring for corner sealing, and the right end of the motor end cover is provided with an O-type rubber sealing ring for radial sealing.

[0011] As a further description of the above technical solution:

[0012] A plurality of bosses are provided in the middle of the positioning plate, and a plurality of grooves are provided on the outer wall of the insulating base.

[0013] As a further description of the above technical solution:

[0014] A plurality of marking grooves are provided on the outer side of the insulating socket, and a plurality of semicircular grooves are provided inside the semicircular groove.

[0015] The utility model has the following beneficial effects:

[0016] 1. In the utility model, the plug of the explosion-proof cable head is matched with the fixed socket in the motor end cover, so as to meet the use of high-voltage and high-power submersible motors, and the installation is quick and safe, the transportation is convenient, and the structure is safe and reliable in explosion-proof environments. It solves the problem that the explosion-proof requirements cannot be met and the high-voltage and high-power cable heads cannot be used in explosive environments, and the problems of sufficiently large creepage distance and sufficiently high insulation requirements are not met.

[0017] 2. In the present invention, the lead wire passes through the insulating base and is electrically connected to the power cable through the connector and the socket, thereby achieving two layers of insulation, enhancing the insulation performance, and solving the problem of insufficient insulation during the electrical connection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of a portable pluggable explosion-proof cable head structure proposed by the utility model;

[0019] Figure 2 This is a cross-sectional view of the cable head structure of a portable pluggable explosion-proof cable head structure proposed by the utility model;

[0020] Figure 3 This is a cross-sectional view of the socket structure of a portable pluggable explosion-proof cable head structure proposed by the utility model;

[0021] Figure 4 This is a partial structural diagram of a portable pluggable explosion-proof cable head structure proposed by the utility model;

[0022] Figure 5 This is a schematic diagram of the insulating socket structure of a portable pluggable explosion-proof cable head structure proposed by the utility model;

[0023] Figure 6 This is a cross-sectional view of the flange shell structure of a portable pluggable explosion-proof cable head structure proposed by the utility model.

[0024] Legend:

[0025] 1. Power cable; 2. Sealant; 3. Flange housing; 4. Sealing gasket; 5. Sealing ring (1); 6. Insulating socket; 7. Locking sleeve; 8. Plug; 9. Lead wire; 10. Positioning plate; 11. Insulating base; 12. Connector; 13. Socket (1); 14. Insulating tube; 15. O-ring for corner seal; 16. O-ring for radial seal; 17. Boss; 18. Groove; 19. Marking groove; 20. Semicircular groove; 21. Motor end cover. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Reference Figure 2 、 Figure 5 and Figure 6 The utility model provides an embodiment of a portable pluggable explosion-proof cable head structure, including a power cable 1, a sealing gasket 4 is fixedly connected to the left end of the power cable 1, a sealing ring 5 is fixedly connected to the left side of the sealing gasket 4, the power cable 1 passes through the sealing gasket 4 and is fixedly connected to the sealing ring 5, the outer wall of the sealing ring 5 is fixedly connected to an insulating socket 6, the outer side of the insulating socket 6 is fixedly connected to a locking sleeve 7, so as to realize the sealing of the power cable 1 and isolate the inside and the outside, the outer wall of the locking sleeve 7 is fixedly connected to a flange shell 3, the interior of the flange shell 3 is provided with a sealant 2, the cable core is completely sealed in the sealant 2, and isolated from the external medium, the left end of the power cable 1 is fixedly connected to a plug 8; a plurality of marking grooves 19 are provided on the outer side of the insulating socket 6, and a plurality of semicircular grooves 20 are provided on the interior of the flange shell 3;

[0028] Specifically, when using a portable plug-in explosion-proof cable head, the power cable 1 is connected through the sealing gasket 4 fixed on its left side, and a sealing ring 5 is also fixed on the left side of the sealing gasket 4. The power cable 1 passes through the sealing gasket 4 and the sealing ring 5, and an insulating socket 6 is fixed on the outside. A locking sleeve 7 is fixed on the outside of the insulating socket 6, and a flange shell 3 is fixed on the outside of the locking sleeve 7. Sealant 2 is provided inside the flange shell 3. A plug 8 is also fixed on the left side of the power cable 1 to meet the use requirements of high-voltage and high-power submersible motors. This design is quick and safe to install, easy to transport, suitable for explosion-proof environments, and ensures a safe and reliable structure. In addition, it solves the problem that traditional high-voltage and high-power cable heads cannot meet explosion-proof requirements and cannot be used in explosive environments. At the same time, it overcomes the problems of insufficient creepage distance and substandard insulation performance. Two marking grooves 19 are provided on the outside of the insulating socket 6, and two semicircular grooves 20 are provided inside the flange shell 3.

[0029] Reference Figure 3 and Figure 4 A motor end cover 21 is provided on the left side of the power cable 1. A lead wire 9 is fixedly connected to the inside of the motor end cover 21. An insulating base 11 is provided on the outer wall of the lead wire 9 as a first insulating layer. A connector 12 is fixedly connected to the right end of the lead wire 9. A socket 13 is fixedly connected to the right side of the connector 12. A socket 13 is provided on the left side of the power cable 1. The socket 13 is electrically connected to the power cable 1. A positioning plate 10 is fixedly connected to the outside of the lead wire 9. An insulating tube 14 is fixedly connected to the outside of the socket 13 as a second insulating layer. A plurality of bosses 17 are provided in the middle of the positioning plate 10, and a plurality of grooves 18 are provided on the outer wall of the insulating base 11.

[0030] Specifically, when using a portable plug-in explosion-proof cable head, a lead wire 9 is fixed inside the motor end cover 21, an insulating base 11 is provided on the outside of the lead wire 9, a connector 12 is fixed on the right side of the lead wire 9, a socket 13 is fixed on the right side of the connector 12, and the socket 13 is electrically connected to the plug 8 of the power cable 1. A positioning plate 10 is fixed on the outside of the insulating base 11, and an insulating tube 14 is fixed on the outside of the socket 13 to achieve double-layer insulation, improve insulation performance, and solve the problem of insufficient insulation during the connection process. Three bosses 17 are provided in the middle of the positioning plate 10, and three grooves 18 are provided on the outside of the insulating base 11.

[0031] Reference Figure 1 , the left end of the flange housing 3 is provided with an O-type rubber sealing ring 15 for corner sealing, and the right end of the motor end cover 21 is provided with an O-type rubber sealing ring 16 for radial sealing, adopting double sealing of corner sealing and radial sealing;

[0032] Specifically, an O-type rubber sealing ring 15 for corner sealing is installed on the left side of the flange housing 3. The main function of this sealing ring is to ensure the sealing performance between the flange housing 3 and the connecting parts. The right side of the motor end cover 21 is also equipped with an O-type rubber sealing ring 16 for radial sealing to ensure the normal operation of the motor and extend its service life.

[0033] Working principle: When it is necessary to use a portable plug-in explosion-proof cable head, a sealing gasket 4 is fixed on the left side of the power cable 1, and a sealing ring 5 is also fixed on the left side of the sealing gasket 4. The power cable 1 passes through the sealing gasket 4 and is connected to the sealing ring 5. The outside of the sealing ring 5 is fixed with an insulating socket 6, and the outside of the insulating socket 6 is fixed with a locking sleeve 7. The outside of the locking sleeve 7 is fixed with a flange shell 3, and a sealant 2 is provided inside the flange shell 3. A plug 8 is also fixed on the left side of the power cable 1, which meets the requirements of high-voltage and high-power submersible motors, is quick and safe to install, and is easy to transport. It can be used in explosion-proof environments and has a safe and reliable structure. It solves the problems that the high-voltage and high-power cable heads cannot meet the explosion-proof requirements and cannot be used in explosive environments, and do not meet the requirements of sufficiently large creepage distance and sufficiently high insulation.

[0034] When a portable plug-in explosion-proof cable head is needed, a lead-in wire 9 is fixed through the inside of the motor end cover 21, and an insulating base 11 is provided on the outside of the lead-in wire 9. A connector 12 is fixed to the right side of the lead-in wire 9, and a socket 13 is fixed to the right side of the connector 12. The socket 13 is electrically connected to the plug of the power cable 1, a positioning plate 10 is fixed on the outside of the insulating base 11, and an insulating tube 14 is fixed on the outside of the socket 13, realizing two layers of insulation, enhancing the insulation performance, and solving the problem of insufficient insulation during the electrical connection process.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A portable pluggable explosion-proof cable head structure, comprising a power cable (1), characterized in that: The left end of the power cable (1) is fixedly connected to a sealing gasket (4), the left side of the sealing gasket (4) is fixedly connected to a sealing ring 1 (5), the power cable (1) passes through the sealing gasket (4) and is fixedly connected to the sealing ring 1 (5), the outer wall of the sealing ring 1 (5) is fixedly connected to an insulating socket (6), the outer side of the insulating socket (6) is fixedly connected to a locking sleeve (7), the outer wall of the locking sleeve (7) is fixedly connected to a flange shell (3), the interior of the flange shell (3) is provided with a sealant (2), and the left end of the power cable (1) is fixedly connected to a plug (8).

2. The portable pluggable explosion-proof cable head structure according to claim 1, characterized in that: The left side of the power cable (1) is provided with a motor end cover (21), the interior of the motor end cover (21) is fixedly connected with a lead wire (9), the outer wall of the lead wire (9) is provided with an insulating base (11), the right end of the lead wire (9) is fixedly connected with a connector (12), the right side of the connector (12) is fixedly connected with a socket 1 (13), the socket 1 (13) is electrically connected to the plug (8) of the power cable (1), the outer side of the insulating base (11) is fixedly connected with a positioning plate (10), and the outer side of the socket 1 (13) is fixedly connected with an insulating tube (14).

3. The portable pluggable explosion-proof cable head structure according to claim 2, characterized in that: The left end of the flange housing (3) is provided with an O-type rubber sealing ring (15) for corner sealing, and the right end of the motor end cover (21) is provided with an O-type rubber sealing ring (16) for radial sealing.

4. The portable pluggable explosion-proof cable head structure according to claim 2, characterized in that: A plurality of bosses (17) are provided in the middle of the positioning plate (10), and a plurality of grooves (18) are provided on the outer wall of the insulating base (11).

5. The portable pluggable explosion-proof cable head structure according to claim 1, characterized in that: The outer side of the insulating socket (6) is provided with a plurality of marking grooves (19), and the interior of the flange housing (3) is provided with a plurality of semicircular grooves (20).

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