CN210838762U

CN210838762U - Special explosion-proof threading pipe of motor

Info

Publication number: CN210838762U
Application number: CN201921548913.1U
Authority: CN
Inventors: 王连军; 王萌; 石涛
Original assignee: Lihuayi Weiyuan Chemical Co ltd
Current assignee: Lihuayi Weiyuan Chemical Co ltd
Priority date: 2019-09-16
Filing date: 2019-09-16
Publication date: 2020-06-23
Anticipated expiration: 2029-09-16

Abstract

The utility model discloses an explosion-proof threading pipe special for a motor, which comprises a first joint connected with a motor junction box and a second joint connected with a reserved galvanized pipe, wherein a steel wire hose is crimped between the first joint and the second joint; the first joint interface end is connected with the tubular crimping ring, and the outer wall of the first joint interface end is provided with two fixing lugs which are arranged oppositely; the second joint is characterized in that the second joint center hole is in a horn shape at the joint end, an annular groove is formed in the end face of the second joint end, two clamping lugs which are arranged oppositely are arranged on the outer wall of the second joint end, each clamping lug comprises an upper clamping lug and a lower clamping lug, and a clamping groove communicated with the annular groove is formed in the outer wall of the second joint end between the upper clamping lug and the lower clamping lug. The utility model discloses simple structure, simple to operate only lean on ordinary spanner to accomplish effective installation, can be exclusively used in motor power cable threading protection.

Description

Special explosion-proof threading pipe of motor

Technical Field

The utility model relates to a cable protection technical field, concretely relates to special explosion-proof threading pipe of motor.

Background

The motor is a device for converting electric energy into mechanical energy, is used as an energy transmission carrier, has wide application, and is particularly indispensable in the fields of dangerous chemicals such as oil refining, chemical engineering and the like. The premise of normal operation of the motor is that normal power supply exists, the power cable is used as a transmission carrier of electric energy, and good laying of the power cable is the premise of ensuring normal transmission of the electric energy. The laying and threading of the power cable of the motor have strict requirements, particularly for an explosion-proof area of a hazardous chemical device, the power cable is laid to be close to the motor in an overhead manner through a groove box, then is led down through a reserved galvanized pipe to enter the ground through the groove box, and penetrates out of a reserved galvanized pipe opening to a position close to a motor wire inlet, a distance is still reserved from the power cable to the motor wire inlet after the power cable penetrates out, and the power cable at the distance needs to be protected. If this section cable does not protect, in device construction work in-process or later stage maintenance operation, this section cable very easily causes damage such as welding slag scald, heavy object injures by a crashing object, and the insulating layer is damaged then lightly, and the cable insulation is inefficacy even causes short circuit fault then heavily, and in explosion-proof area, such trouble has brought very big hidden danger for safety in production, so this section power cable's protection work is very necessary. The conventional method is that an explosion-proof flexible pipe is used for connecting a reserved galvanized pipe opening with a motor wire inlet and then a power cable is threaded, but both ends of the conventional explosion-proof flexible pipe are connected in a loose joint mode, a special wire sleeving machine is used for sleeving wires on the outer side of the pipe wall when the reserved galvanized pipe side is connected with the explosion-proof flexible pipe, a horn mouth cannot be manufactured when a galvanized pipe outlet is reserved after the wire sleeving, a cable insulating layer is easily scratched during threading, wire connection or welding is needed when the motor wire inlet side is connected with the explosion-proof flexible pipe, the wire connection is only suitable for a small motor with a wire inlet matched with an internal thread, most motors can be connected only through welding, the operation is complex, and the technical requirement on constructors is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the shortcoming that prior art exists, provide a special explosion-proof threading pipe of motor.

In order to realize the purpose, the technical scheme of the utility model is that: an explosion-proof threading pipe special for a motor is characterized in that: the device comprises a first connector connected with a motor junction box and a second connector connected with a reserved galvanized pipe, wherein a steel wire hose is pressed between the first connector and the second connector; the first joint interface end is connected with a tubular compression joint ring, the inner diameter of the first joint is the same as that of the compression joint ring, two fixing lugs arranged oppositely are arranged on the outer wall of the first joint interface end, and a connecting hole is formed in the center of each fixing lug;

the connector comprises a first connector central hole, a second connector central hole, a clamping lug, a clamping groove and a clamping groove, wherein the connector end of the second connector central hole is in a horn shape, the end face of the second connector central hole is provided with an annular groove, the annular groove is close to the second connector central hole, the outer wall of the second connector central hole is provided with two clamping lugs which are oppositely arranged, each clamping lug comprises an upper clamping lug and a lower clamping lug, a gap is reserved between each upper clamping lug and the corresponding lower clamping lug, the upper clamping lug and the lower clamping lug are connected through a bolt, and the outer wall of the second connector central hole is provided with the clamping groove communicated with the annular groove.

Further, the outer wall of the crimping ring is provided with threads.

And a sealing rubber layer is arranged on the inner wall of the annular groove.

The utility model has the advantages that:

1) the utility model discloses simple structure, simple to operate only lean on ordinary spanner to accomplish effective installation, can be exclusively used in motor power cable threading protection.

2) The utility model discloses when being connected with the motor terminal box, seal up with the original sealing rubber circle and the seal gasket of joining in marriage of motor inlet to effective sealing connection is accomplished to the original bolt of joining in marriage of motor terminal box, is compared in the welding, the utility model discloses construction operation is simple and easy, the design of crimping ring for first joint also can be connected with the inlet wire threaded micromotor, and the suitability is strong.

3) The utility model discloses the second connector design has the ring channel, and the inner wall is equipped with the sealing rubber layer, cup joints and reserves the galvanized pipe mouth of pipe back fastening bolt and presss from both sides tight centre gripping ear alright realize effective sealing connection, reaches explosion-proof requirement, compares in mantle fiber silk even, the utility model discloses with reserve galvanized pipe connection simple and convenient, with low costs; the trumpet-shaped connector of the center hole of the second connector enables the cable to be threaded without scratching the cable insulating layer.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a second joint construction;

FIG. 3 is a sectional view of the second connector taken along the center of the clamping groove;

fig. 4 is an enlarged schematic view of a in fig. 3.

In the figure: 1. a first joint; 2. a second joint; 21. a central bore; 22. an annular groove; 23. a sealing rubber layer; 24. a clamping groove; 3. a steel wire hose; 4. a crimp ring; 5. fixing the ear; 51. connecting holes; 6. a clamping lug; 61. an upper clamping lug; 62. a lower clamping lug; 63. and (4) bolts.

Detailed Description

Example (b):

as shown in fig. 1 to 4, the explosion-proof threading pipe special for the motor comprises a first connector 1 connected with a motor junction box and a second connector 2 connected with a reserved galvanized pipe, wherein a steel wire hose 3 is crimped between the first connector 1 and the second connector 2.

The first connector 1 is characterized in that an interface end is fixedly connected with a tubular crimping ring 4, the inner diameter of the first connector 1 is the same as that of the crimping ring 4, and threads are arranged on the outer wall of the crimping ring 4. The outer wall of the interface end of the first connector 1 is provided with two fixing lugs 5 which are arranged oppositely, and the center of each fixing lug 5 is provided with a connecting hole 51;

the central hole 21 of the second joint 2 is in a horn shape at the interface end, an annular groove 22 is arranged on the end face of the interface end of the second joint 2, the annular groove 22 is close to the central hole 21 of the second joint 2, a sealing rubber layer 23 is arranged on the inner wall of the annular groove 22, two clamping lugs 6 which are oppositely arranged are arranged on the outer wall of the interface end of the second joint 2, each clamping lug 6 comprises an upper clamping lug 61 and a lower clamping lug 62, a gap is reserved between the upper clamping lug 61 and the lower clamping lug 62, the upper clamping lug 61 and the lower clamping lug 62 are connected through a bolt 63, the lower clamping lug 62 is in threaded connection with the bolt 63, a clamping groove 24 which is communicated with the annular groove 22 is arranged on the outer wall of the interface end of the second joint 2 between the upper clamping lug 61 and the lower clamping lug 62, the length of the bottom edge of the clamping lug is set to be L1, the length of the clamping groove is L2, the depth of the annular.

When in specific use, the power cable for protecting the leakage of the 55KW motor is taken as an example. The power cable penetrates out of the galvanized pipe orifice and then is reserved for a length enough to penetrate through the interface end of the second connector 2 and penetrate out of the interface end of the first connector 1, and the central hole 21 of the second connector 2 is horn-shaped at the interface end, so that the power cable can be prevented from being scratched in the penetrating process. The annular groove 22 of the second connector 2 is sleeved with the orifice of the reserved galvanized pipe, the sealing rubber layer 23 is tightly attached to the pipe wall of the reserved galvanized pipe, and then the bolt 63 is fastened to clamp the clamping lug 6, so that the sealing rubber layer 23 is sealed and fastened more tightly, and the explosion-proof purpose is achieved.

After power cable worn out from first joint 1 interface end, made the cable head, will the sealing rubber circle and the seal gasket that 55KW motor was originally joined in marriage embolia the cable head root, will make the cable head the cable penetrate inside the motor terminal box after, with first joint 1 connection motor terminal box, crimping ring 4 impresses the sealing rubber circle and the seal gasket that the motor was originally joined in marriage inside the terminal box inlet wire, use the fastening bolt that the motor was originally joined in marriage to penetrate behind the connecting hole 51 of fixed ear 5 with terminal box threaded connection, finally accomplish the utility model discloses with the motor terminal box with reserve the galvanized pipe be connected.

The above-described embodiments are merely preferred and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Claims

1. An explosion-proof threading pipe special for a motor is characterized in that: the device comprises a first connector connected with a motor junction box and a second connector connected with a reserved galvanized pipe, wherein a steel wire hose is pressed between the first connector and the second connector; the first joint interface end is connected with a tubular compression joint ring, the inner diameter of the first joint is the same as that of the compression joint ring, two fixing lugs arranged oppositely are arranged on the outer wall of the first joint interface end, and a connecting hole is formed in the center of each fixing lug;

2. The explosion-proof threading tube special for the motor as claimed in claim 1, wherein: the outer wall of the compression joint ring is provided with threads.

3. The explosion-proof threading tube special for the motor as claimed in claim 1, wherein: and a sealing rubber layer is arranged on the inner wall of the annular groove.