CN113133144B

CN113133144B - Pipeline anticorrosion joint coating auxiliary assembly

Info

Publication number: CN113133144B
Application number: CN202010038358.9A
Authority: CN
Inventors: 王长江; 闫洁; 郭奇超; 贾超
Original assignee: China National Petroleum Corp; China Petroleum Pipeline Engineering Corp; Pipeline Research Institute of CNPC
Current assignee: China National Petroleum Corp; China Petroleum Pipeline Engineering Corp; Pipeline Research Institute of CNPC
Priority date: 2020-01-14
Filing date: 2020-01-14
Publication date: 2022-08-30
Anticipated expiration: 2040-01-14
Also published as: CN113133144A

Abstract

The utility model provides a pipeline anticorrosion repaired mouth auxiliary assembly belongs to the anticorrosive technical field of pipeline. The connecting unit in the pipeline anticorrosion joint coating auxiliary equipment is placed on a notch of a pipeline, an annular plate-shaped fixing plate in the connecting unit is sleeved on the pipeline, and an induction cable and a radiation plate on the inner wall of the fixing plate heat the pipeline. The connecting piece passes through the first through hole on the fixed plate, and the connecting piece both ends are connected radiation plate and spacing piece respectively, and the surface of spacing piece offsets with the outer wall of fixed plate, and the connecting piece has connected the radiation plate on the fixed plate with spacing piece, relatively uses a plurality of bolted connection fixed plate and radiation plate's easy operation. And the other end of the connecting piece is provided with a cable hole which is communicated to the connecting joint, a cable enters the connecting piece from the cable hole and is connected with the radiation plate, the cable is positioned on the outer wall of the fixing plate, the heat radiation received by the cable is less, and the cable can be prevented from being damaged by heating.

Description

Pipeline anticorrosion joint coating auxiliary assembly

Technical Field

The utility model relates to a pipeline anticorrosion technical field, in particular to pipeline anticorrosion repaired mouth auxiliary assembly.

Background

The pipeline anticorrosion repaired mouth is a very important part in a pipeline anticorrosion system, and the pipeline anticorrosion repaired mouth refers to repaired mouth on the gap of an anticorrosion layer on a pipeline. When the gap is repaired, the pipeline at the gap needs to be preheated, the primer covering the gap is coated on the pipeline after the temperature of the pipeline reaches the standard, and the primer is heated and cured. And then installing a heat-shrinkable tape covering the notch and the primer on the pipeline, and carrying out heat treatment on the heat-shrinkable tape to shrink and fasten the heat-shrinkable tape so as to finish the work of anticorrosion joint coating of the pipeline. The heating procedure in the above step may be implemented by a heating device.

In the related art, the heating apparatus may include a fixing plate in a shape of a circular plate, an intermediate frequency cable disposed on an inner wall of the fixing plate, and a plurality of radiation plates uniformly distributed on the inner wall of the fixing plate along a circumferential direction of the fixing plate. A plurality of radiation plates pass through a plurality of bolted connection and pass through cable junction between a plurality of radiation plates on the inner wall of fixed plate, and the cable is located the fixed plate inner wall. However, in such a heating structure, the radiation plate is inconvenient to assemble and disassemble, and the cable connected to the radiation plate is easily damaged by heat radiation.

Disclosure of Invention

The embodiment of the disclosure provides pipeline anticorrosion repaired mouth auxiliary equipment, which can simplify the installation of radiation plates and reduce the heat radiation to which cables between the radiation plates can be subjected. The technical scheme is as follows:

the embodiment of the disclosure provides pipeline anticorrosion repaired mouth auxiliary equipment, which comprises a control unit and a plurality of connecting units, wherein the connecting units are sequentially connected,

each connecting unit comprises a fixed plate, a plurality of radiation plates, a fixed assembly, an induction cable, a connecting piece and a limiting piece, the fixed plate is annular plate-shaped, the radiation plates are uniformly distributed on the inner wall of the fixed plate along the circumferential direction of the fixed plate, a coaxial annular cable accommodating groove is arranged on the inner wall of the fixed plate, the annular cable accommodating groove and the radiation plates are arranged at intervals in the axial direction of the fixed plate, the fixed assembly is used for coaxially fixing the induction cable in the annular cable accommodating groove,

the control unit is used for controlling the radiation plate and the induction cable to heat,

the fixing plate is provided with a first through hole, the connecting piece penetrates through the first through hole, one end of the connecting piece is connected with the radiation plate, the other end of the connecting piece is connected with the limiting piece, the surface of the limiting piece is abutted to the outer wall of the fixing plate, the connecting piece is provided with a cable hole for passing a cable, and the cable hole is extended from one end of the connecting piece to the other end of the connecting piece.

Optionally, the connecting piece is columnar, the limiting piece is sleeved and connected on the connecting piece, the limiting piece is further provided with at least two supporting legs, and one ends, far away from the limiting piece, of the at least two supporting legs extend towards the fixing plate.

Optionally, the connecting piece has a ring groove in the circumference, and the spacing piece is arranged in the ring groove in a clamped manner.

Optionally, the connection unit further includes a U-shaped gasket, the U-shaped gasket is clamped in the annular groove, and the limiting piece is located between the fixing plate and the U-shaped gasket.

Optionally, each of the connecting members has two cable holes, and the two cable holes are arranged at intervals in the circumferential direction of the fixing plate.

Optionally, the connecting unit further includes a plurality of U-shaped heat insulating plates corresponding to the plurality of radiation plates one by one, one radiation plate is disposed in each U-shaped groove of each U-shaped heat insulating plate, each U-shaped heat insulating plate is clamped between one radiation plate and the fixing plate, and the U-shaped heat insulating plate is provided with a second through hole sleeved on the connecting member.

Optionally, the fixing assembly has two connecting ends, and the two connecting ends are detachably connected to two sides of the annular cable accommodating groove.

Optionally, fixed subassembly includes mounting panel, adjusting bolt and pressure strip, two links of mounting panel are connected respectively the both sides of annular cable holding tank, adjusting bolt one end with the middle part threaded connection of mounting panel, adjusting bolt's the other end with the pressure strip is connected, the pressure strip orientation the annular cable holding tank is provided with the arc and compresses tightly the face.

Optionally, the fixing assembly further comprises an anti-dropping plate, the anti-dropping plate is perpendicularly connected to the other end of the adjusting bolt, a clamping groove is formed in the pressing plate, the clamping groove penetrates through the pressing plate in the extending direction of the induction cable, and the anti-dropping plate is inserted in the clamping groove.

Optionally, the connection unit further comprises a falling prevention rod, and two ends of the falling prevention rod are connected to the inner wall of the annular cable accommodating groove.

The technical scheme provided by the embodiment of the disclosure has the following beneficial effects: when the mouth needs to be mended at pipeline anticorrosive coating, put a plurality of consecutive linkage units in the anticorrosive mouth auxiliary assembly of mending of pipeline on the breach of pipeline, the fixed plate cover of annular plate shape is on the pipeline, and induction cable and a plurality of radiation plates on the inner wall of fixed plate can heat the pipeline, and the control unit then controls induction cable and the heating of a plurality of radiation plates. The connecting piece passes through the first through hole on the fixed plate, and the connecting piece both ends are connected radiation plate and spacing piece respectively, and the surface of spacing piece offsets with the outer wall of fixed plate, and the connecting piece has connected the radiation plate on the fixed plate with spacing piece, relatively uses a plurality of bolted connection fixed plate and radiation plate's easy operation. And the other end of the connecting piece is provided with a cable hole which is communicated to the connecting joint, a cable enters the connecting piece from the cable hole and is connected with the radiation plate, the cable is positioned on the outer wall of the fixing plate, the heat radiation received by the cable is less, and the cable can be prevented from being damaged by heating.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings used in the description of the embodiments will be briefly introduced,

FIG. 1 is a schematic view of an expanded structure of a pipeline anticorrosion joint coating auxiliary device provided by an embodiment of the disclosure;

FIG. 2 is a schematic view of a use state of an auxiliary device for anticorrosion joint coating of a pipeline provided by an embodiment of the present disclosure;

FIG. 3 is a detailed schematic view of a pipeline anticorrosion repaired mouth auxiliary device provided by the embodiment of the disclosure;

FIG. 4 is a schematic view of a pipeline anticorrosion joint coating auxiliary device provided by the embodiment of the disclosure;

fig. 5 is a schematic view illustrating a connection condition between a radiation plate and a fixing plate provided in an embodiment of the present disclosure;

fig. 6 is a detailed schematic view of a radiation plate and a fixing plate provided in the embodiments of the present disclosure;

fig. 7 is a schematic structural diagram of a fixing assembly provided in an embodiment of the present disclosure.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

Fig. 1 is a schematic view of an expanded structure of an auxiliary device for corrosion prevention and joint coating of a pipeline according to an embodiment of the present disclosure, and as shown in fig. 1, the auxiliary device for corrosion prevention and joint coating of a pipeline includes a control unit 1 (not shown in fig. 1) and a plurality of connection units 2, and the plurality of connection units 2 are connected in sequence.

It should be noted that the pipeline anticorrosion joint coating auxiliary device shown in fig. 1 can be further closed, the closed structure can be shown in fig. 2, fig. 2 is a schematic view of a use state of the pipeline anticorrosion joint coating auxiliary device provided by the embodiment of the present disclosure, and as shown in fig. 2, the fixing plate 21 is an annular plate connected in an initial position.

Fig. 3 is a detailed schematic view of the pipeline anticorrosion joint coating auxiliary device provided by the embodiment of the present disclosure, and as shown in fig. 3, each connection unit 2 includes a fixing plate 21, a plurality of radiation plates 22, a fixing assembly 23, an induction cable 24, a connection piece 25 (not shown in fig. 3), and a limiting piece 26 (not shown in fig. 3). The fixing plate 21 is in the shape of an annular plate, the plurality of radiation plates 22 are uniformly distributed on the inner wall of the fixing plate 21 along the circumferential direction of the fixing plate 21, the inner wall of the fixing plate 21 is provided with a coaxial annular cable accommodating groove 211, the annular cable accommodating groove 211 and the plurality of radiation plates 22 are arranged at intervals in the axial direction of the fixing plate 21, and the fixing assembly 23 is used for coaxially fixing the induction cable 24 in the annular cable accommodating groove 211.

Fig. 4 is a schematic diagram of a pipeline anticorrosion joint coating auxiliary device provided by the embodiment of the disclosure, a control unit 1 is electrically connected with a connection unit 2, and the control unit 1 is used for controlling the radiation plate 22 and the induction cable 24 to heat.

Fig. 5 is a schematic view illustrating a connection condition between the radiation plate and the fixing plate according to an embodiment of the present disclosure, as shown in fig. 5, the fixing plate 21 has a first through hole 212, the connecting element 25 passes through the first through hole 212, one end of the connecting element 25 is connected to the radiation plate 22, the other end of the connecting element 25 is connected to the limiting plate 26, a surface of the limiting plate 26 abuts against an outer wall of the fixing plate 21, the connecting element 25 has a cable hole 251 for passing the cable 10, and the cable hole 251 extends from one end of the connecting element 25 to the other end of the connecting element 25.

When the mouth needs to be mended at the pipeline anticorrosive coating, put a plurality of continuous connecting element 2 in proper order in the anticorrosive mouth auxiliary assembly of mending of pipeline on the breach of pipeline, annular platelike fixed plate 21 cover is on the pipeline, and induction cable 24 and a plurality of radiation plate 25 on the inner wall of fixed plate 21 can heat the pipeline, and control unit 1 then controls induction cable 24 and the heating of a plurality of radiation plate 25. The connecting piece 25 passes through the first through hole 212 on the fixed plate 21, and the radiation plate 22 and the spacing piece 26 are connected respectively at the two ends of the connecting piece 25, the surface of the spacing piece 26 is abutted against the outer wall of the fixed plate 21, the radiation plate 22 is connected on the fixed plate 21 by the connecting piece 25 and the spacing piece 26, and the operation of connecting the fixed plate 21 and the radiation plate 22 by using a plurality of bolts is relatively simple. And the other end of the connecting piece 25 is provided with a cable hole 251, the cable 10 enters the connecting piece 25 from the cable hole 251 and is connected with the radiation plate 22, the cable 10 is positioned on the outer wall of the fixing plate 21, the cable 10 can receive less heat radiation, and the cable 10 can be prevented from being damaged by heat.

Alternatively, the control unit 1 may include a microcomputer or a single chip microcomputer, etc. The controller is used to control the heating of the radiant panel 22 and the induction cable 24.

Note that the radiation plate 22 has two plate surfaces, and one plate surface of the radiation plate 22 away from the fixed plate 21 is a heating surface 221.

Alternatively, the fixing plate 22 may be made of a heat insulating material.

In one implementation employed by the present disclosure, the fixation plate 22 may be a high temperature resistant plastic material.

The mounting plate 22, when formed of a high temperature resistant plastic material, may be expanded into the configuration shown in fig. 1 or joined end-to-end into the annular configuration shown in fig. 2.

In one implementation provided by the present disclosure, the radiation plate 22 may be an infrared radiation plate, and the radiation plate 22 may include at least a box-shaped housing and a heating structure, the heating structure is located in the box-shaped housing, the control unit is electrically connected with the heating structure, the heating structure is controlled to heat, and heat generated by the heating structure is transferred to the box-shaped housing to heat the box-shaped housing. Wherein the box-shaped housing may be made of stainless steel and the heating structure may comprise a thermal resistance wire.

In other implementations provided by the present disclosure, the radiation plate 22 may also be configured as other structures or add an insulating layer on the basis of the box-shaped housing, or the radiation plate 22 is made of different materials, which is not limited by the present disclosure.

Alternatively, the box-shaped housing of the radiation plate 22 may be made of ceramic. The heat conduction effect is better.

In one implementation provided by the present disclosure, the sensing cable 24 may at least include a cable core and an insulating layer, where the cable core of the sensing cable 24 includes a wire core, and a mica tape and a high temperature resistant yarn are coated outside the wire core.

Alternating current is introduced into a plurality of induction cables 24 surrounding the pipeline, induction current is generated in the pipeline, and the induction current in the pipeline is blocked in the pipeline to generate heat, so that the pipeline is heated.

As shown in fig. 4, the connection unit 2 may further include a drop-preventing bar 27, both ends of the drop-preventing bar 27 being connected to the inner wall of the annular cable-receiving groove 211.

For some induction cables 24 with larger length, the arrangement of the anti-falling rod 27 can prevent the induction cables 24 from falling, and the heating effect is ensured.

Alternatively, the anti-falling rod 27 may be an arc-shaped rod in the length direction, the plane of the arc-shaped anti-falling rod 27 is perpendicular to the extending direction of the induction cable 24, and the anti-falling rod 27 may abut against the induction cable 24. The position of the sensing cable 24 can be well controlled and the sensing cable 24 is prevented from falling from the annular cable receiving groove 211.

Illustratively, both ends of the drop prevention bar 27 may be welded and fixed with the annular cable receiving groove 211.

In other implementations provided by the present disclosure, the two ends of the anti-falling rod 27 may also be connected to the plate surface of the fixing plate 22, and may be connected to the plate surface of the fixing plate 22 by bolts. The present disclosure is not limited thereto.

Illustratively, the radiation plate 22 and the connection member 25 may be electrically connected by using a joint. The whole assembly and disassembly are convenient.

When the radiation plate 22 and the connecting member 25 are electrically connected by using the joint, the cable 10 passes through the cable hole 251 and is fixed with the joint, and the joint prevents the cable 10 from directly contacting the radiation plate 22, thereby further protecting the cable 10.

As shown in fig. 5, the connecting member 25 may be in a column shape, the position-limiting piece 26 is sleeved on the connecting member 25, the position-limiting piece 26 further has at least two supporting legs 261, and one end of the at least two supporting legs 261 far away from the position-limiting piece 26 extends toward the fixing plate 21.

When the radiation plate 22 and the fixing plate 21 are connected, the radiation plate 22 can be placed on the fixing plate 21, the connecting piece 25 is inserted into the first through hole 212 on the fixing plate 21 and is connected with the radiation plate 22, one end of the connecting piece 25 is connected with the radiation plate 22, when the other end of the connecting piece 25 is connected with the limiting piece 26, the position of the limiting piece 26 sleeved on the connecting piece 25 can be adjusted until the supporting leg 261 connected to the limiting piece 26 is slightly unfolded under pressure, and then the connecting piece 25 is connected with the limiting piece 26. The support legs 261 have a tendency to spring back in the direction from one end of the connector 25 to the other end, which causes the connector 25 to move slightly in the direction from one end of the connector 25 to the other end, so that the radiation plate 22 at one end of the connector 25 abuts against the fixed plate 21. The radiation plate 22 is tightly connected with the fixing plate 21.

As shown in fig. 5, the connecting member 25 has an annular groove 252 in the circumferential direction, and the stopper piece 26 is engaged in the annular groove 252.

The annular groove 252 is provided to facilitate positioning and installation of the limiting piece 26.

As shown in fig. 5, the connecting unit 2 may further include a U-shaped gasket 28, the U-shaped gasket 28 is clamped in the annular groove 252, and the limiting piece 26 is located between the fixing plate 21 and the U-shaped gasket 28.

After the radiation plate 22, the connecting member 25 and the limiting piece 26 are installed, if the connecting member 25 can move in the axial direction, the U-shaped gasket 28 can be inserted into the annular groove 252, so that the supporting legs 261 of the limiting piece 26 abut against the outer wall of the fixing plate 21, and the radiation plate 22 is stably connected with the fixing plate 21.

As shown in fig. 5, each of the connection members 25 may have two cable holes 251, and the two cable holes 251 are spaced apart in the circumferential direction of the fixing plate 21.

In this arrangement, the radiation plates 22 of one radiation plate 22 on both sides in the circumferential direction of the fixed plate 21 can be connected by the cables 10 in the two cable holes 251, respectively, and the connection structure between the radiation plates 22 is simple and easy to operate.

Fig. 6 is a detailed schematic view of the radiation plates and the fixing plates according to the embodiment of the disclosure, and as shown in fig. 6, the connection unit 2 further includes a plurality of U-shaped heat insulation plates 29 corresponding to the plurality of radiation plates 22 one by one, one radiation plate 22 is disposed in a U-shaped groove 291 of each U-shaped heat insulation plate 29, each U-shaped heat insulation plate 29 is sandwiched between one radiation plate 22 and the fixing plate 21, and the U-shaped heat insulation plate 29 has a second through hole 292 sleeved on the connection member 25.

The radiation plate 22 is placed in the U-shaped groove 291 of the U-shaped heat insulation plate 29, heat of the radiation plate 22 can be directly transmitted to the surface of a pipeline, the heat of the radiation plate 22 cannot be transversely laid on the induction cable 24 in the annular cable accommodating groove 211 on the fixing plate 22, damage of an intermediate frequency cable can be avoided, and the service life of the pipeline anticorrosion repaired port auxiliary device is prolonged. The U-shaped heat insulation board 29 is provided with a second through hole 292 sleeved on the connecting piece 25, the connecting piece 25 can be inserted into the second through hole 292, and the U-shaped heat insulation board 29 is clamped and fixed between the radiation board 22 and the fixing board 21, so that the U-shaped heat insulation board 29 is convenient to disassemble and assemble while heat insulation is realized.

Fig. 7 is a schematic structural view of a fixing member provided in an embodiment of the present disclosure, and referring to fig. 3 and 7, the fixing member 23 may have two connecting ends detachably connected to both sides of the annular cable receiving groove 211.

This structure enables easy attachment and detachment of the fixing member 23.

With reference to fig. 4 and 6, the fixing assembly 23 includes a mounting plate 231, an adjusting bolt 232 and a pressing plate 233, two connecting ends of the mounting plate 231 are respectively connected to two sides of the annular cable accommodating groove 211, one end of the adjusting bolt 232 is in threaded connection with the middle of the mounting plate 231, the other end of the adjusting bolt 232 is connected with the pressing plate 233, and the pressing plate 233 is provided with an arc-shaped pressing surface 211a facing the annular cable accommodating groove 211.

With this arrangement of the fixing assembly 23, the distance between the pressing plate 233 at the other end of the adjusting bolt 232 and the induction cable 24 can be adjusted by rotating the adjusting bolt 232, so as to press the induction cables 24 with different diameters.

Referring to fig. 3 and 7, one connection end of the mounting plate 231 may be located between two insulation assemblies 29 adjacent in the extending direction of the induction cable 24, and the other connection end of the mounting plate 231 may be located between two other insulation assemblies 29 adjacent in the extending direction of the induction cable 24.

This arrangement can reduce the space required for the joint between the mounting plate 231 and the fixing plate 22, and increase the heating area of the radiation plate 22.

The mounting plate 231 may be bolted at both ends to the radiation plate 22 and the fixed plate 22.

As shown in fig. 6, the mounting plate 231 may be a U-shaped mounting plate 231, and the opening of the mounting plate 231 faces the sensing cable 24.

The mounting plate 231 is a U-shaped mounting plate 231, and the opening of the mounting plate 231 faces the sensing cable 24, so that the manufacturing cost of the mounting plate 231 can be reduced, and the adjustment space between the adjusting bolt 232 and the pressing plate 233 can be increased.

Alternatively, the surface of the pressing plate 233 adjacent to the induction cable 24 may be an arc-shaped curved surface. Facilitating the pressing plate 233 to press the induction cable 24.

The fixing assembly 23 further includes an anti-slip plate 234, the anti-slip plate 234 is vertically connected to the other end of the adjusting bolt 232, the pressing plate 233 has a slot 233a, and the slot 233a penetrates the pressing plate 233 in the extending direction of the sensing cable 24. The retaining plate 234 is inserted into the slot 233 a.

The anti-falling plate 234 can prevent the pressing plate 233 from falling off the adjusting bolt 232, and the pressing plate 233 can be moved in parallel to separate the pressing plate 233 from the anti-falling plate 234, so that the whole assembly and disassembly are facilitated.

In other implementations provided by the present disclosure, the connection unit 2 may also include a plurality of fixing components 23 disposed along the extending direction of the sensing cable 24, so as to press the sensing cable 24 better. The present disclosure is not limited thereto.

The above description is meant to be illustrative of the principles of the present disclosure and not to be taken in a limiting sense, and any modifications, equivalents, improvements and the like that are within the spirit and scope of the present disclosure are intended to be included therein.

Claims

1. The pipeline anticorrosion repaired mouth auxiliary equipment comprises a control unit (1) and a plurality of connecting units (2), wherein the connecting units (2) are sequentially connected,

the connecting device is characterized in that each connecting unit (2) comprises a fixing plate (21), a plurality of radiation plates (22), a fixing assembly (23), an induction cable (24), a connecting piece (25) and a limiting piece (26), the fixing plate (21) is in an annular plate shape, the radiation plates (22) are uniformly distributed on the inner wall of the fixing plate (21) along the circumferential direction of the fixing plate (21), a coaxial annular cable accommodating groove (211) is formed in the inner wall of the fixing plate (21), the annular cable accommodating groove (211) and the radiation plates (22) are arranged at intervals in the axial direction of the fixing plate (21), and the fixing assembly (23) is used for coaxially fixing the induction cable (24) in the annular cable accommodating groove (211),

the control unit (1) is used for controlling the radiation plate (22) and the induction cable (24) to heat,

the fixing plate (21) is provided with a first through hole (212), the connecting piece (25) penetrates through the first through hole (212), one end of the connecting piece (25) is connected with the radiation plate (22), the other end of the connecting piece (25) is connected with the limiting piece (26), the surface of the limiting piece (26) is abutted to the outer wall of the fixing plate (21), the connecting piece (25) is provided with a cable hole (251) for passing a cable (10), and the cable hole (251) extends from one end of the connecting piece (25) to the other end of the connecting piece (25).

2. The auxiliary device for the anticorrosion patching of the pipeline, according to claim 1, wherein the connecting piece (25) is columnar, the limiting piece (26) is sleeved on the connecting piece (25), at least two supporting legs (261) are further provided on the limiting piece (26), and one ends, far away from the limiting piece (26), of the at least two supporting legs (261) extend towards the fixing plate (21).

3. The auxiliary equipment for the anticorrosion repaired mouth of the pipeline is characterized in that an annular groove (252) is formed in the circumferential direction of the connecting piece (25), and the limiting piece (26) is clamped in the annular groove (252).

4. The auxiliary device for the corrosion prevention and the joint coating of the pipeline as claimed in claim 3, wherein the connecting unit (2) further comprises a U-shaped gasket (28), the U-shaped gasket (28) is clamped in the annular groove (252), and the limiting piece (26) is located between the fixing plate (21) and the U-shaped gasket (28).

5. The auxiliary device for pipe anticorrosion patch according to any one of claims 1 to 4, wherein each of the connecting members (25) has two cable holes (251), and the two cable holes (251) are arranged at intervals in the circumferential direction of the fixing plate (21).

6. The auxiliary equipment for the anticorrosion patching of the pipeline, according to any one of claims 1 to 4, wherein the connection unit (2) further comprises a plurality of U-shaped heat insulation plates (29) corresponding to the plurality of radiation plates (22) one by one, one radiation plate (22) is placed in a U-shaped groove (291) of each U-shaped heat insulation plate (29), each U-shaped heat insulation plate (29) is clamped between one radiation plate (22) and the fixing plate (21), and a second through hole (292) sleeved on the connection member (25) is formed in each U-shaped heat insulation plate (29).

7. The auxiliary device for pipe corrosion prevention and joint coating according to any one of claims 1 to 4, wherein the fixing member (23) has two connecting ends, and the two connecting ends are detachably connected to both sides of the annular cable receiving groove (211).

8. The auxiliary device for the anticorrosion repaired mouth of the pipeline is characterized in that the fixing assembly (23) comprises a mounting plate (231), an adjusting bolt (232) and a pressing plate (233), two connecting ends of the mounting plate (231) are respectively connected to two sides of the annular cable accommodating groove (211), one end of the adjusting bolt (232) is in threaded connection with the middle of the mounting plate (231), the other end of the adjusting bolt (232) is connected with the pressing plate (233), and the pressing plate (233) is provided with an arc-shaped pressing surface (211a) facing the annular cable accommodating groove (211).

9. The auxiliary equipment for the anticorrosion repaired mouth of the pipeline is characterized in that the fixing component (23) further comprises an anti-dropping plate (234), the anti-dropping plate (234) is vertically connected to the other end of the adjusting bolt (232), the pressing plate (233) is provided with a clamping groove (233a), the clamping groove (233a) penetrates through the pressing plate (233) in the extending direction of the induction cable (24), and the anti-dropping plate (234) is inserted into the clamping groove (233 a).

10. The auxiliary device for the anticorrosion patching of the pipeline as claimed in any one of claims 1 to 4, wherein the connection unit (2) further comprises a drop-preventing rod (27), and both ends of the drop-preventing rod (27) are connected to the inner wall of the annular cable-receiving groove (211).