CN220881098U - Sleeve valve pipe welding fixture - Google Patents

Abstract

The utility model provides a sleeve valve pipe welding tool which comprises a support frame arranged above an operation hole, a fixing device hinged on the support frame, and a driving part for driving the fixing device to rotate, wherein the fixing device is hinged on the support frame; the support frame is provided with a bearing part for bearing the upper sleeve valve pipe, the lower sleeve valve pipe is connected above the upper sleeve valve pipe, the fixing device comprises a limiting part radially inserted along the lower sleeve valve pipe, and the limiting part is driven to be abutted on the lower sleeve valve pipe for enabling the lower sleeve valve pipe and the upper sleeve valve pipe to be coaxial. According to the sleeve valve pipe welding tool, the support frame and the fixing device are arranged above the operation hole, and the driving part drives the fixing device to rotate, so that the limiting part can be abutted on the upper sleeve valve pipe to form the limiting of the upper sleeve valve pipe, and the upper sleeve valve pipe and the lower sleeve valve pipe are coaxial. The arrangement can avoid the connection bending of the upper sleeve valve pipe and the lower sleeve valve pipe during manual operation, so as to ensure grouting effect and operation efficiency.

Description

Sleeve valve pipe welding fixture

Technical Field

The utility model relates to the technical field of karst grouting, in particular to a sleeve valve pipe welding tool.

Background

In the grouting process of the sleeve valve pipe, an auxiliary orientation device is needed to be used for welding and fixing the sleeve valve pipe penetrating into the ground and the sleeve valve pipe above the sleeve valve pipe into a longer grouting pipe, and the sleeve valve pipe grouting method becomes the most reliable grouting method at present because the grouting range and the grouting pressure can be well controlled and repeated grouting can be carried out.

However, when the existing sleeve valve pipe is welded with the sleeve valve pipe penetrating into the ground, a manual fixing mode is adopted, the line is easy to bend when the upper sleeve valve pipe enters the soil after being welded, the sleeve valve pipe is seriously influenced to finish grouting, and meanwhile, the grouting efficiency of the sleeve valve pipe is reduced. Therefore, in the prior art, the sleeve valve pipe is positioned and corrected by adopting the sleeve valve pipe grouting auxiliary orientation device, but because the device has a complex structure and heavy weight, the soil collapse phenomenon is easily caused at the position where the auxiliary orientation device is buried, and the difficulty of sleeve valve pipe grouting is increased.

Disclosure of utility model

In view of the above, the utility model aims to provide a sleeve valve pipe welding tool which can ensure the coaxiality of an upper sleeve valve pipe and a lower sleeve valve pipe, so as to ensure that the sleeve valve pipe does not bend after penetrating into soil and ensure grouting effect.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

A sleeve valve pipe welding tool,

The device comprises a support frame arranged above an operation hole, a fixing device hinged on the support frame, and a driving part for driving the fixing device to rotate;

the supporting frame is provided with a supporting part for supporting the upper sleeve valve tube,

The upper sleeve valve tube is connected with a lower sleeve valve tube above the upper sleeve valve tube, the fixing device comprises a limiting part radially inserted along the lower sleeve valve tube, and the limiting part is driven to abut against the lower sleeve valve tube and is used for enabling the lower sleeve valve tube and the upper sleeve valve tube to be coaxial.

Further, a welding sleeve is sleeved at the joint of the upper sleeve valve pipe and the lower sleeve valve pipe, the lower end of the welding sleeve is fixedly welded with the lower sleeve valve pipe, and the lower end of the welding sleeve is abutted above the bearing part and used for limiting the axial displacement of the welding sleeve along the upper sleeve valve pipe;

The upper sleeve valve pipe is inserted into the upper end of the welding sleeve, and the welding sleeve is arranged between the fixing device and the supporting frame.

Further, the supporting frame comprises a supporting frame body and travelling wheels arranged below the supporting frame body,

The bracket body is provided with a through groove, and the lower sleeve valve pipe passes through the through groove.

Further, the fixing device comprises a bottom frame which is arranged in a crisscross manner, and the limiting part is perpendicular to the bottom frame and is arranged in a protruding manner at one side close to the upper sleeve valve tube;

the length direction of the underframe is arranged along the axial extension of the upper sleeve valve tube.

Further, the limiting part comprises limiting pipes which are arranged at intervals along the length direction of the underframe, and an accommodating space for accommodating the upper sleeve valve pipe is formed between the two limiting pipes along the width direction of the underframe.

Further, the underframe comprises a long pipe and a short pipe, the long pipe is longitudinally arranged, the short pipe is vertically arranged between the two long pipes, and the limiting pipe is arranged at the included angle of the long pipe and the short pipe.

Further, the fixing device further comprises a rotating frame arranged on the underframe, and the rotating frame is pivotally connected to the bracket body;

The rotating frame is driven to rotate, so that the upper sleeve valve pipe is inserted into the accommodating space, and the short pipe is abutted against the upper sleeve valve pipe to form a positioning state.

Further, a fixing plate is arranged on the support body and is connected with a driving part for driving the rotating frame to rotate.

Further, the rotating frame comprises a first rotating rod connected between the bracket and the upper end of the underframe, and a second rotating rod connected between the bracket and the lower end of the underframe,

And a triangular cavity is formed by surrounding the first rotating rod, the second rotating rod and the underframe.

The fixing device is provided with a vertical detection part and a horizontal detection part.

Compared with the prior art, the utility model has the following advantages:

According to the sleeve valve pipe welding tool, the support frame and the fixing device are arranged above the operation hole, and the driving part drives the fixing device to rotate, so that the limiting part can be abutted against the upper sleeve valve pipe to form the limiting of the upper sleeve valve pipe, and the upper sleeve valve pipe and the lower sleeve valve pipe are coaxial. The arrangement can avoid the connection bending of the upper sleeve valve pipe and the lower sleeve valve pipe during manual operation, so as to ensure grouting effect and operation efficiency.

In addition, by arranging the welding sleeve, the upper part and the lower part of the welding sleeve are used for socket joint of the upper sleeve valve pipe and the lower sleeve valve pipe, so that the coaxiality of the joint of the upper sleeve valve pipe and the lower sleeve valve pipe can be ensured. And the position adjustment of the sleeve valve pipe welding tool can be facilitated by arranging the travelling wheels.

In addition, through setting up triangle-shaped structure, can guarantee the stability and the structural strength of chassis to can effectively improve welding quality. And the first rotary rod and the second rotary rod are respectively and pivotally connected with the underframe, and the angle of the first rotary rod and the second rotary rod relative to the underframe can be driven to change through the rotation of the driving part, so that the angle adjustment of the underframe is realized.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

Fig. 1 is a schematic perspective view of a first view angle of a sleeve valve tube welding tool according to an embodiment of the present utility model;

Fig. 2 is a schematic perspective view of a second view angle of a sleeve valve tube welding tool according to an embodiment of the present utility model;

fig. 3 is a schematic perspective view of a third view angle of a sleeve valve tube welding tool according to an embodiment of the present utility model;

Fig. 4 is a schematic diagram of a connection structure between a chassis and a limiting portion according to an embodiment of the present utility model.

Reference numerals illustrate:

1. A support frame; 2. a fixing device; 3. a driving section; 4. an upper sleeve valve tube; 5. a lower sleeve valve tube; 6. welding a sleeve; 7. a vertical detection unit; 8. a level detection unit;

101. A bracket body; 102. a walking wheel; 103. a through groove; 104. a fixing plate;

201. A limit part; 202. a chassis; 203. a rotating frame;

2011. A limiting tube; 2021. a long tube; 2022. a short pipe;

2031. a first rotating lever; 2032. and a second rotating lever.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "back", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. In addition, the terms "first," "second," are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, in the description of the present utility model, the terms "mounted," "connected," and "connected," are to be construed broadly, unless otherwise specifically defined. For example, the connection can be fixed connection, detachable connection or integrated connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in combination with specific cases.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

The embodiment relates to a sleeve valve pipe welding tool, which comprises a support frame 1 arranged above an operation hole, a fixing device 2 hinged on the support frame 1, and a driving part 3 for driving the fixing device 2 to rotate; the support frame 1 has the supporting portion that is used for bearing upper sleeve valve pipe 4, and upper sleeve valve pipe 4 top is connected with lower sleeve valve pipe 5, and fixing device 2 includes spacing portion 201 that radially inserts along lower sleeve valve pipe 5, and spacing portion 201 is driven the butt on lower sleeve valve pipe 5 for make lower sleeve valve pipe 5 and upper sleeve valve pipe 4 coaxial.

According to the sleeve valve pipe welding tool of the embodiment, the support frame 1 and the fixing device 2 are arranged above the operation hole, and the driving part 3 drives the fixing device 2 to rotate, so that the limiting part 201 can be abutted on the upper sleeve valve pipe 4 to form limiting of the upper sleeve valve pipe 4, and the upper sleeve valve pipe 4 and the lower sleeve valve pipe 5 are coaxial. The arrangement can avoid the bending of the upper sleeve valve pipe 4 and the lower sleeve valve pipe 5 during manual operation, so as to ensure grouting effect and operation efficiency.

Based on the above overall description, the sleeve valve tube welding fixture of this embodiment is disposed above the working hole. The lower sleeve valve tube 5 is partially penetrated into the ground and partially arranged at the upper part of the ground. The upper sleeve valve tube 4 may be aligned with the lower sleeve valve tube 5 by a crane apparatus and the upper sleeve valve tube 4 may be fixed by the fixing device 2. In this embodiment, the upper sleeve valve tube 4 and the lower sleeve valve tube 5 are seamless steel tubes with an outer diameter of 60mm, and in order to avoid the influence of contacting with a net cable, a single section is 3m long, and a first section is provided with a shuttle point with a length of 50cm.

As a possible implementation manner, a welding sleeve 6 is sleeved at the joint of the upper sleeve valve pipe 4 and the lower sleeve valve pipe 5 in the embodiment, the lower end of the welding sleeve 6 is welded and fixed with the lower sleeve valve pipe 5, and the lower end of the welding sleeve 6 is abutted above the bearing part and used for limiting the axial displacement of the welding sleeve 6 along the upper sleeve valve pipe 4; the upper sleeve valve tube 4 is inserted at the upper end of the welding sleeve 6, and the welding sleeve 6 is arranged between the fixing device 2 and the supporting frame 1.

In a specific structure, the inner diameter of the welding sleeve 6 is 60mm, the outer diameter is phi 61mm, the welding sleeve 6 is welded and fixed with one end of the lower sleeve valve pipe 5 protruding out of the ground, and the upper end of the lower sleeve valve pipe 5 extends into the middle of the welding sleeve 6 in the height direction. The upper part of the welding sleeve 6 is used for the socket joint of the upper sleeve valve pipe 4, so that the coaxiality of the joint of the upper sleeve valve pipe 4 and the lower sleeve valve pipe 5 can be ensured. And the welding sleeve 6 has a simple structure, is easy to implement, is favorable for positioning the upper sleeve valve pipe 5 and the lower sleeve valve pipe 5, and ensures the welding effect.

In order to facilitate the position adjustment of the welding fixture, the support frame 1 of the present embodiment includes a support body 101 and a travelling wheel 102 disposed below the support body 101, a through groove 103 is formed on the support body 101, and the lower sleeve valve tube 5 passes through the through groove 103. In a specific structure, as shown in fig. 2, the through groove 103 is a groove provided on the bracket body 101 and opening to the upper sleeve valve tube 4, and the groove width of the through groove 103 is adapted to the outer diameter of the upper sleeve valve tube 4.

And the groove width of the through groove 103 is smaller than the outer diameter of the welding sleeve 6 so that the lower end surface of the welding sleeve 6 is overlapped on the upper plane of the bracket body 101. The bottom surface of the through groove 103 and the rotation rear limit portion 201 are aligned in the height direction of the upper and lower sleeve valve tubes 5, so that the coaxiality of the welding sleeve 6, the lower sleeve valve tube 5 and the upper sleeve valve tube 4 can be further ensured.

The walking wheel 102 is arranged in the embodiment, so that the positions of the sleeve valve pipe welding tool can be conveniently adjusted at the positions of different operation holes in time, and the usability of the sleeve valve pipe welding tool is improved.

In addition, the fixing device 2 of the embodiment comprises a bottom frame 202 which is arranged in a crisscross manner, and the limiting part 201 is arranged perpendicular to the bottom frame 202 and is convexly arranged at one side close to the upper sleeve valve tube 4; the chassis 202 is disposed along the axial extension of the upper sleeve 4 in the longitudinal direction. In a specific structure, as shown in fig. 1 to 4, the chassis 202 of the present embodiment is disposed perpendicular to the bracket body 101 in an operating state.

Specifically, as shown in fig. 4, the chassis 202 includes long tubes 2021 arranged in a longitudinal direction, and short tubes 2022 vertically disposed between the two long tubes 2021, and a limiting tube 2011 is disposed at an included angle of the long tubes 2021 and the short tubes 2022. The long tube 2021 and the short tube 2022 are welded and fixed as a whole. At the welding station, the short tube 2022 is used to abut against the upper sleeve valve tube 4 to perform a limiting function in one direction on the cross section, and the limiting portion 201 is used to limit movement of the upper sleeve valve tube 4 in the other direction.

Further, the limiting portion 201 includes limiting pipes 2011 disposed at intervals along the length direction of the chassis 202, and an accommodating space for accommodating the upper sleeve valve pipe 4 is defined between the two limiting pipes 2011 along the width direction of the chassis 202. In a specific structure, as shown in fig. 1 to 4, the spacing between the two limiting pipes 2011 in the embodiment is between 60.05 and 60.1mm, and a certain friction force can be generated between the two limiting pipes 2011 and the upper sleeve valve pipe 4 to enable the upper sleeve valve pipe 4 to be relatively fixed, so that the welding effect is improved.

In order to adjust the verticality of the upper sleeve valve tube 4, the fixing device 2 is provided with a vertical detection part 7 and a horizontal detection part 8. The vertical detection section 7 and the horizontal detection section 8 of the present embodiment employ leveling bubbles. As shown in fig. 4, four vertical detection portions 7 are arranged at intervals along the extending direction of the long tube 2021, and horizontal detection portions 8 are provided on the short tubes 2022, and may be provided on the uppermost short tube 2022 or on each short tube 2022, so that the upper sleeve valve tube 4 can be corrected by leveling bubbles before welding.

In this embodiment, the position of the upper sleeve valve tube 4 can be adjusted manually, and the angle between the fixing device 2 and the bracket body 101 can be adjusted by rotating the driving part 3, so as to ensure that the upper sleeve valve tube 4 and the lower sleeve valve tube 5 are coaxial.

For convenience of implementation, the bracket body 101 of the present embodiment is provided with a fixing plate 104, the driving portion 3 is connected to the fixing plate 104, and the power output end of the driving portion 3 is disposed at the pivot center of the rotating frame 203. The driving part 3 of the present embodiment adopts a driving motor, and as a possible implementation, the fixing device 2 further includes a rotating frame 203 disposed on the bottom frame 202, and the rotating frame 203 is pivotally connected to the bracket body 101.

Further, the rotating frame 203 is driven to rotate so that the upper sleeve valve tube 4 is inserted into the accommodating space, and the short tube 2022 abuts against the upper sleeve valve tube 4 to form a welded state. After the fixing device 2 fixes the upper sleeve valve tube 4 in place, the upper sleeve valve tube 4 is welded to the welding sleeve 6 by a manual or other welding device.

In order to play a better role in fixing, after the upper sleeve valve tube 4 is inserted into the limiting sleeve, the upper sleeve valve tube 4 is positioned through the limiting part 201, and a limiting plate is arranged between the two limiting tubes 2011 and at one side far away from the short tube 2022, and two ends of the fixing plate 104 are fixed with the limiting tubes 2011 through bolts, so that the upper sleeve valve tube 4 is arranged in a fixing space among the limiting tubes 2011, the short tube 2022 and the limiting plate.

Further, as shown in fig. 1 to 3, the rotating frame 203 includes a first rotating rod 2031 connected between the bracket and the upper end of the chassis 202, and a second rotating rod 2032 connected between the bracket and the lower end of the chassis 202, and a triangular cavity is defined between the first rotating rod 2031, the second rotating rod 2032 and the chassis 202. By arranging the triangular structure, the stability and structural strength of the underframe 202 can be ensured, and thus the welding quality can be effectively improved.

The first rotating lever 2031 is pivotally connected to the second rotating lever 2032, and a drive shaft of the drive section 3 is connected to the pivot centers of the first rotating lever 2031 and the second rotating lever 2032. The first rotating lever 2031 and the second rotating lever 2032 are respectively pivotally connected to the chassis 202, and the rotation of the driving unit 3 can drive the angle change of the first rotating lever 2031 and the second rotating lever 2032 with respect to the chassis 202, thereby realizing the angle adjustment of the chassis 202.

In actual operation, the phenomenon of uneven ground often occurs on the upper plane of the working hole due to outdoor work, and at this time, the upper sleeve valve pipe 4 and the lower sleeve valve pipe 5 can be kept concentric by adjusting the angle between the chassis 202 and the bracket body 101 by the driving unit 3.

The technological process of grouting construction of the sleeve valve pipe in the embodiment is as follows:

Step one, preparing construction;

Step two, measuring and paying off, grouting the sleeve valve pipe, wherein the hole depth is 32-42 m, the hole bottom enters a dense sand layer to be not less than 2m, the hole position deviation is not more than 10cm,

Step three, drilling with the pipe

Drilling sequence: strictly executing jump Kong Shizuan, jumping hole grouting, ensuring that no hole stringing occurs in the drilling and grouting processes, and simultaneously avoiding larger sedimentation caused by concentrated drilling. And determining the jumping hole distance according to a process test. The proposed pilot hole jump spacing is as follows: the interval between the drill holes in the same row is not smaller than 4m, and the interval between the drill holes and the grouting holes is not smaller than 10m.

And after the grouting hole position is calibrated, the down-the-hole drill is moved to the drilling position. And after the drilling machine is in place, an automatic angle adjusting system on the drilling machine is adopted to adjust the drilling machine to a design angle, so that the drill bit is aligned to the center of the lofting point. And (3) punching holes by adopting an eccentric impactor, and synchronously drilling with a pipe, wherein the diameter of the sleeve is phi 127mm. The following pipe is drilled to penetrate through the broken stone cushion layer and the pile cap, and the steel casing pipe is brought into the slightly dense powder soil layer.

Step four, forward circulation drilling

After the casing pipe is lowered to the designed depth, the casing pipe is replaced by a geological drilling machine, mud is used for protecting walls and cutting and drilling, no hole collapse is ensured in the drilling process, and the concentration of the mud in the holes is strictly controlled.

Step five, installing sleeve valve tube

A seamless steel pipe with the outer diameter of 60mm is adopted, in order to avoid the influence of a contact net cable, a single section is 3m long, a first section is provided with a shuttle tip, the length is 50cm, each section is provided with an outer joint, the inner diameter phi of the outer joint is 61mm, and the outer joints are connected in a welding mode. After the lower sleeve valve tube 5 is welded and fixed to the welding sleeve 6, the lower sleeve valve tube 5 is inserted into the working hole, and the upper sleeve valve tube 4 is inserted into the welding sleeve 6 by a transport device such as a crane or by a man. The driving part drives the chassis to rotate and is abutted against the upper sleeve valve pipe, the upper sleeve valve pipe is inserted into the limit space, and then the chassis is adjusted according to the detection of the vertical detection part and the horizontal detection part so that the upper sleeve valve pipe 4 and the lower sleeve valve 5 are coaxial.

Step six, pouring the shell material

The sleeve valve pipe is placed in a drilled hole, the water bag type slurry stopping plug is placed down to a position 1m away from the bottom of the hole, the water bag is pressurized to stop slurry, the sleeve shell material is injected through the galvanized pipe, and the sleeve shell material extrudes drilling slurry in a mode of returning slurry from the bottom of the hole. The shell material is prepared from bentonite, cement and accelerator, and the water-cement ratio of the shell material is as follows: bentonite: cement = 1:1.5:0.8 formulation, 12 hour age compressive strength about 0.3MPa. And stopping pouring the shell material when the whole space between the hole wall and the outer wall of the sleeve valve tube is filled with the shell material.

Step seven, grouting

After the shell material reaches a certain strength, the grouting pipe grout stop plug is connected, the grouting pipe is put into the sleeve valve pipe, and the grouting pipe is retracted upwards from the hole bottom. When slurry channeling and slurry leakage occur in the grouting process, dual-liquid grouting should be immediately performed, single-liquid grouting is continued after the slurry leakage is not stopped, and grouting end is controlled according to grouting pressure, grouting amount and monitoring data.

The grouting pressure is basically determined according to an on-site process test, and is timely adjusted according to the deformation condition of the roadbed and the grouting amount in the grouting process. The non-pressure grouting is carried out at the vertical depth of 0-33 m below the road surface (soil filling and pile area), the grouting pressure is not more than 0.5MPa, and the grouting pressure from the vertical depth of 33m below the road surface to the sleeve valve pipe bottom is 1-1.5 MPa. And (5) timely adjusting according to grouting conditions. The grouting duration is not less than 15min.

Eighth step, waste pulp and waste residue treatment

And waste slurry barrels are arranged at the front ends of the pump station and grouting, and after grouting is finished, waste slurry barrels and sedimentation tanks are transported by utilizing a flat car to discard slag, and the waste slurry is transported to an off-line waste slag field through a logistics channel for discharging.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (10)

1. The utility model provides a sleeve valve pipe welding frock which characterized in that:

Comprises a support frame (1) arranged above a working hole, a fixing device (2) hinged on the support frame (1), and a driving part (3) for driving the fixing device (2) to rotate;

The support frame (1) is provided with a bearing part for bearing the upper sleeve valve tube (4);

The upper sleeve valve tube (4) is connected with a lower sleeve valve tube (5) above, the fixing device (2) comprises a limiting part (201) radially inserted along the lower sleeve valve tube (5), and the limiting part (201) is driven to be abutted on the lower sleeve valve tube (5) so as to enable the lower sleeve valve tube (5) and the upper sleeve valve tube (4) to be coaxial.

2. A sleeve welding fixture as defined in claim 1, wherein:

A welding sleeve (6) is sleeved at the joint of the upper sleeve valve pipe (4) and the lower sleeve valve pipe (5), the lower end of the welding sleeve (6) is fixedly welded with the lower sleeve valve pipe (5), and the lower end of the welding sleeve (6) is abutted above the bearing part and used for limiting the axial displacement of the welding sleeve (6) along the upper sleeve valve pipe (4);

The upper sleeve valve tube (4) is inserted into the upper end of the welding sleeve (6), and the welding sleeve (6) is arranged between the fixing device (2) and the supporting frame (1).

3. A sleeve welding fixture as defined in claim 2, wherein:

The support frame (1) comprises a support body (101) and a travelling wheel (102) arranged below the support body (101);

A through groove (103) is formed in the support body (101), and the lower sleeve valve tube (5) passes through the through groove (103).

4. A sleeve welding fixture according to claim 3, wherein:

the fixing device (2) comprises an underframe (202) which is arranged in a crisscross manner, and the limiting part (201) is perpendicular to the underframe (202) and is arranged in a protruding manner at one side close to the upper sleeve valve tube (4);

The length direction of the underframe (202) is arranged along the axial extension of the upper sleeve valve tube (4).

5. A sleeve welding fixture as defined in claim 4, wherein:

The limiting parts (201) comprise limiting pipes (2011) arranged at intervals along the length direction of the underframe (202), and an accommodating space for accommodating the upper sleeve valve pipe (4) is formed between the two limiting pipes (2011) along the width direction of the underframe (202).

6. A sleeve welding fixture as defined in claim 5, wherein:

The underframe (202) comprises a long tube (2021) which is longitudinally arranged, and a short tube (2022) which is vertically arranged between the two long tubes (2021), and the limiting tube (2011) is arranged at an included angle between the long tube (2021) and the short tube (2022).

7. A sleeve welding fixture as defined in claim 6, wherein:

The fixing device (2) further comprises a rotating frame (203) arranged on the underframe (202), and the rotating frame (203) is pivotally connected to the bracket body (101);

The rotating frame (203) is driven to rotate so that the upper sleeve valve tube (4) is inserted into the accommodating space, and the short tube (2022) is abutted against the upper sleeve valve tube (4) to form a positioning state.

8. A sleeve welding fixture as defined in claim 7, wherein:

The bracket is characterized in that a fixed plate (104) is arranged on the bracket body (101), the driving part (3) is connected to the fixed plate (104), and the power output end of the driving part (3) is arranged at the pivot center of the rotating frame (203).

9. A sleeve welding fixture as defined in claim 7, wherein:

The rotating frame (203) comprises a first rotating rod (2031) connected between the bracket and the upper end of the underframe (202), and a second rotating rod (2032) connected between the bracket and the lower end of the underframe (202);

A triangular cavity is formed between the first rotary rod (2031), the second rotary rod (2032) and the underframe (202).

10. A sleeve welding fixture according to any one of claims 1 to 9, wherein:

The fixing device (2) is provided with a vertical detection part (7) and a horizontal detection part (8).