CN204221288U - The female weld brackets of universal adjustable pipe - Google Patents

Abstract

The utility model belongs to the field of auxiliary equipment for the welding process of tubular busbars, in particular to a universal adjustable welding bracket for tubular busbars. The utility model comprises an axial support seat, on which a plurality of axial guide wheels are arranged, and a tube nut is erected on the axial guide wheels, and the outer rims of each axial guide wheel cooperate to form a supporting part; the universal adjustable tube nut The welding bracket also includes a lifting mechanism, on which a rotary support seat is arranged, and the roller surfaces of multiple circumferential rollers on the rotary support seat constitute the contact surface; the lowest height of the contact surface after the lifting mechanism is lowered is lower than that of the axial support seat. The support height of the tube nut at the support part, the highest height of the contact surface after the lifting mechanism is lifted is higher than the support height of the tube nut at the support part on the axial support seat. The utility model can realize the purpose of one-time on-line welding of the pipe mother without mechanical lifting, and the welding speed and quality can be significantly improved.

Description

Universal adjustable pipe female welding bracket

technical field

The utility model belongs to the field of auxiliary equipment for the welding process of tubular busbars, in particular to a general-purpose adjustable tubular welding bracket capable of one-time on-line welding of the tubular bus without mechanical lifting assistance.

Background technique

With the rapid development of my country's economy, the demand for electricity in the whole society is increasing day by day. At present, the low-voltage side of 110kV and 220KV substations adopts 10kV and 35kV voltage levels. With the increase of the main transformer capacity, the rated current of the incoming line side of the low-voltage side of the transformer is also increasing. It is increasingly difficult for conventional rectangular bus bars to meet the requirements of bus heating and short-circuit electromotive force technically and structurally. As a substitute for rectangular busbars, tubular busbars (referred to as tubular busbars) are mainly used in the conductor connection between power grid transmission wires and substation transformers in my country's electric power construction projects, jumpers in transmission lines, connecting conductors in power equipment, and It is one of the key components in the power transmission and transformation system, and it plays a vital role in the safe and reliable operation of the power transmission and transformation system and power equipment.

The welding and installation of pipe mother has always been a relatively cumbersome and time-consuming process. Due to the limited length of a single pipe nut, it is often necessary to weld the ends of multiple pipe nuts coaxially in order to connect them into a pipe nut group that meets the length. The traditional welding operation is realized through the pipe mother support frame. The support frame of the pipe mother generally includes a frame body, and the inner side of the frame body is arranged with rollers whose guiding direction is parallel to the axis of the pipe mother. When in use, it is necessary to arrange the pipe nut support frame at the same level, rely on erecting the pipe mother support frame on the pipe mother support frame, and slide it forward and backward along the pipe mother support frame to realize the axial direction of the ends of multiple pipe nuts. Splicing and welding purposes. The disadvantage of the above-mentioned traditional structure is that due to the huge weight of the pipe nut itself, how to completely realize the surrounding welding of the end of the pipe nut on the pipe nut support frame that can only be guided along the axial direction of the pipe nut is very important. State Grid Corporation's standard process and technical measures for pipe mother installation require that the pipe mother should be formed at one time during the welding process to avoid excessive arc breaks and prevent oxidation from affecting welding quality. The argon protection must not be interrupted. However, the actual situation is just the opposite. Since the pipe nut cannot rotate during the above welding process, the pipe nut can only be lifted by a crane after welding for one section, then rotated, and then put down the pipe nut again to continue welding the next section. Obviously unavoidable. Even if the human factor is eliminated as much as possible in welding, it can only weld 80% of the whole welding workload in a single welding at most. In addition, due to the need to lift and rotate the pipe nut after welding one section to weld the next section, regardless of whether there is a welding concentricity deviation after the two-section pipe nut connected by only a small end is lifted at the same time, rotated and repositioned And the ensuing welding quality problems; under its own huge self-weight, the lifting operation also needs to wait for the welded tubular busbar to be completely cooled before it can be performed, which greatly increases the welding time, and it is bound to be extremely difficult. Greatly increased the actual construction period, and finally caused great troubles for the construction unit.

Contents of the invention

The purpose of this utility model is to address the shortcomings of the above-mentioned prior art, to provide a simple in structure and reliable general-purpose adjustable pipe mother welding bracket, which can realize the one-time online welding of pipe mother without mechanical lifting. Welding purpose, welding speed and quality can be significantly improved.

In order to achieve the above object, the utility model adopts the following technical solutions:

A general-purpose adjustable pipe nut welding bracket, including an axial support seat for supporting the pipe nut and guiding the axial displacement of the pipe nut. A plurality of axial guide wheels are arranged on the axial support seat. The nut is erected on the axial guide wheels, and the outer rims of each axial guide wheel cooperate to form a supporting part for directly contacting and guiding the axial movement of the pipe nut; the feature is that the universal adjustable pipe nut welding bracket also includes A lifting mechanism that can be used for lifting and lowering at a specified height to the side of the support seat, a rotary support seat is arranged on the lifting mechanism, and the roller surfaces of a plurality of circumferential rollers on the rotary support seat constitute a platform for erecting and rotating the pipe mother. Contact surface: the lowest height of the contact surface after the lifting mechanism is lowered is lower than the supporting height of the tube nut at the supporting part on the axial support seat, and the highest height of the contact surface after the lifting mechanism is raised is higher than that at the supporting part on the axial supporting seat The support height of the tube mother.

The shape of the slewing support seat is in the shape of a "V" frame, and the circumferential roller rims are at least protruding from the inner walls of the two oblique arms forming the "V" frame-shaped slewing support seat. The axis of the circumferential rollers is parallel to the pipe Arranged in the direction of the parent axis; the lifting mechanism also includes a jacking unit for jacking up the slewing support base to make it lift. The jacking unit is a hydraulic jacking structure and/or a mechanical jacking structure.

The jacking unit is a threaded jack, and the bottom of the slewing support seat extends downwards with an extension arm. The shape of the extension arm is in the shape of a pipe sleeve and the inner wall at the bottom end is provided with internal threads. Bolt column, the bottom of the bolt column is fixed to the base at the bottom of the lifting mechanism and forms a rotary fit with the base; the jacking unit also includes a horizontally arranged rocker part that is easy to hold, and the lower section of the bolt column is arranged along a circumferential ring Straight teeth, the tooth surface of the straight teeth is parallel to the axis of the bolt column, the front end ring of the rocker part is sleeved on the bolt column, and the ratchet is arranged at the front end of the rocker part and meshes with the above-mentioned straight teeth of the bolt column And it has ratchet and pawl cooperation with one-way restraint.

The base is provided with a hole, the bottom end of the bolt column is pierced through the hole, and a thrust bearing is arranged at the end of the hole and/or in the hole, and the bolt column and the hole form a bearing rotation fit.

The outer wall of one side of the axial support seat is horizontally indented with a guide groove, and the long direction of the guide groove is located in the vertical direction; the side of the bolt column is horizontally extended to the guide groove. A guide block is formed between the guide block and the guide groove. Guide fit relationship in the vertical direction.

The bottom end of the slewing support seat protrudes downward along the vertical direction with a fixed ring, and the upper end of the extension arm is sleeved in the fixed ring; the fixed ring runs through the ring body to arrange threaded holes for installing fastening screws, and the upper end of the extension arm is connected to the fixed ring. A tight nail-screw fit is formed between them.

The two oblique arms constituting the "V" frame-shaped slewing support base are both provided with accommodating chambers for placing circumferential rollers. The accommodating chambers are arranged along the length of the oblique arms. A through hole symmetrical on one side, through which a detachable pin shaft is interspersed, and the pin shaft constitutes the rotating shaft portion of the circumferential roller.

The included angle formed by the two oblique arms forming the "V" frame-shaped rotary support base is 60°.

The shape of the axial support seat is in the shape of a "V" frame, the shape of the axial guide wheel is in the shape of a column, and the axis of its rotating shaft is arranged perpendicular to the axis of the tube mother; the two support arms that constitute the "V" shape of the axial support seat The axle that constitutes the axial guide wheel and the included angle formed by the two axles is 60°.

The materials used for the wheel surfaces of the axial guide wheel and the circumferential roller are all wear-resistant resin materials.

The beneficial effects of the utility model are:

1) Abandoning the inherent defect of inability to realize online continuous one-time welding caused by the traditional support structure. On the one hand, through the arrangement of the axial support seat and relying on the axial guide wheel, the reciprocating linear motion capability of the tube nut along its axial direction is maintained, so that the tube nut can perform operations such as end butt joints before welding. More importantly, through the arrangement of the hoisting mechanism with circumferential rollers, while the aforementioned pipe nut has the ability to move axially, the online circumferential rotation function of the pipe nut is simultaneously realized. Utilizing the direct contact between the circumferential roller and the outer edge of the tube nut, it plays the role of a rotating guide wheel. In fact, it turns the direct contact between the tube nut and the support frame into a controllable rolling contact, which is obviously more convenient. The rotation operation of the tube mother is realized. At the same time, the arrangement of the lifting mechanism ensures that the design idea can be selected at any time between the rotation of the pipe mother and the translation of the pipe mother according to the actual situation. This is because once the tube nut requires linear displacement, it must not cooperate with the circumferential rollers that ensure its rotation, and vice versa. Through the design of the lifting mechanism, the utility model solves the controllable on-line rotation and front and rear axial movement capabilities during the welding of the pipe mother, so that the purpose of one-time online welding of the pipe mother can be realized without mechanical lifting, and the welding speed can be improved. and quality can be significantly improved.

2), the jacking unit and the rotary support seat are the core parts of the utility model. The "V" frame-shaped rotary support seat ensures the rotation stability of the pipe nut placed inside it. When the pipe nut is safely placed on the circumferential rollers in the slewing support seat, the outer wall of the pipe nut there is also firmly "stuck" on the inner wall of the two oblique arms thereon. The jacking unit may be a hydraulic jacking unit, which is driven by the kinetic energy of a power source such as a hydraulic cylinder to achieve the purpose of lifting and lowering the contact surface of the jacking unit. Of course, a mechanical lifting unit such as a jack can also achieve the above-mentioned lifting effect, as long as it can ensure that the predetermined lifting effect on the slewing support seat is realized as required during design.

3) In the preferred solution of the present utility model, the jacking unit is a threaded jack, that is, a mechanical jacking mechanism. On the one hand, compared with hydraulic and other lifting components, the mechanical jacking mechanism has a simpler structure, smaller volume, easy portability, simple maintenance, and stronger adaptability and independence to the surrounding environment. Especially in line with the current needs of complex construction environments such as mountains and wastelands where power construction is often located. On the other hand, the thread fit structure of the jack is conducive to the precise fine-tuning of the support height of the contact surface on the slewing support seat, and it is more convenient to achieve high coaxiality between multiple pipe nuts, and ultimately provide the support for the subsequent pipe nuts. Precise rotary operation is guaranteed. More specifically, the jacking unit is realized by means of a continuous tubular extension arm at the bottom of the slewing support base, a bolt column threadedly engaged with the tubular extension arm, and a base rotationally engaged with the bolt column. By pre-setting the rocker part that cooperates with the ratchet and pawl between the bolt columns, whenever it is necessary to realize the movement of the lifting mechanism, the rocker part is shaken, and the rocker part and the bolt column are meshed to drive the bolt column to rotate, and the bolt column is relatively The rotation of the base and the extension arm drives the extension arm to produce a lifting action, thereby also realizing the lifting action of the rotary support seat fixed to it on the extension arm, and finally ensuring the lifting of the pipe nut on the contact surface and Road needs. The ratchet pawl action between the bolt column and the crank handle is beneficial to provide the lifting power of the slewing support base with a small range of movement swing, and simultaneously ensure the precise movement of the jacking unit, which is narrow in its own operating range It is especially important in pipe mother welding occasions.

4) The rotary action between the base and the bolt column is realized by the bearing rotation cooperation of the thrust bearing. Thrust bearings, by themselves, are capable of very high axial thrust and are obviously very useful for extension arms and stud columns which are primarily under downward pressure.

5) In order to ensure the consistency of the movement path of the extension arm and the slewing support seat, the guide groove is used to cooperate with the guide block on the side of the bolt column to form a guide rail type matching relationship along the vertical direction, and finally ensure that the extension arm and even the slewing support seat It can always reciprocate along the vertical direction. The fixed ring on the slewing support seat ensures the split fixed fit between it and the extension arm, so as to further refine its composition structure.

6) The circumferential rollers can actually be arranged in multiples arranged along the length direction of the oblique arm of the slewing support seat. The utility model can even reduce the circumferential rollers to a pair through the arrangement of the detachable pin shaft and the accommodating cavity. When needed, the positioning and installation function of the circumferential rollers at different positions in the accommodation cavity can be realized through the insertion of the pin shafts. In this way, not only can the stable support requirements for the specified diameter pipe nut be guaranteed, but also the number of rollers is reduced, and the overall structure is simplified, thus avoiding the mutual position interference phenomenon caused by too many rollers.

7) The shape and structure of the outer frame of the axial support seat are consistent with the rotary support seat, and the angles between the oblique arms and the support arms are also specified angles, so that when the rotary support seat is lifted, the contact on it After the surface crosses the height of the supporting part, it can instantly jack up the pipe mother as a whole to ensure a stable lifting effect on the pipe mother, and its work is reliable, stable and efficient.

8) The wheel surface materials of the axial guide wheel and the circumferential roller are all made of wear-resistant resin material, which ensures the protection effect on the outer wall of the aluminum pipe mother and avoids the damage to the outer wall of the pipe mother caused by the traditional rigid fit between the two. Hard scratches. The softness of the wear-resistant resin material is also conducive to increasing the contact area between the wheel body and the outer wall of the pipe mother. It has high service strength, good wear resistance, and flexible rotation. During the movement and rotation of the pipe mother, there is no impact on the surface of the pipe busbar. No damage, works great.

Description of drawings

Figure 1 is a front view of the axial support seat;

Fig. 2 is the front view of jacking mechanism;

Fig. 3 is a side view after the assembly of the axial support seat and the jacking mechanism is completed;

Fig. 4 is a top view of Fig. 3 after removing the handle portion and the axial guide wheel.

The corresponding relationship between each label in the illustration and the name of each part of the present utility model is as follows:

a-Accommodating cavity b-Tube mother

10-Axial support seat 11-Axial guide wheel 12-Guide groove 13-Support arm

20-rotary support seat

21-circumferential roller 22-oblique arm 23-fixed ring 24-through hole 25-pin shaft

30-Jacking unit 31-Extension arm 32-Bolt column 32a Guide block 33-Crank handle

40-base 41-thrust bearing

Detailed ways

For ease of understanding, the concrete structure and work flow of the present utility model are further elaborated below in conjunction with the diagrams here:

The specific structure of the utility model is shown in Figures 1-4, including a base 40, on which an axial support seat 10 and a rotary support seat 20 are arranged side by side along the pipe mother axis, wherein the bottom of the rotary support seat 20 is fixedly threaded The jack, that is, the jacking unit 30 . The threaded jack cooperates with the rotary support base 20 to form the whole jacking mechanism. The axial support seat 10 is arranged with a "V"-shaped jaw. As shown in Figure 1, the two support arms 13 forming the jaw are provided with rollers of wear-resistant resin material, and the rollers form a vertical axis. Axial guide wheel 11 of pipe mother b axis. The slewing support base 20 is also provided with a "V"-shaped jaw. As shown in FIG. 2 , the included angle between the jaw and the aforementioned axial support base 10 is 60°. The two oblique arms 22 constituting the jaws of the slewing support base 20 are both bracket structures with a hollow accommodating chamber a. A plurality of through-holes 24 are arranged through the housing chamber a along the axial direction of the tube body b. A circumferential roller 21 can be placed in the accommodating chamber a, and the axle of the circumferential roller 21 is the pin shaft 25 inserted in the through hole 24 . Whenever it is necessary to install the circumferential roller 21 at the designated through hole 24, it is only necessary to pull out the pin shaft 25 and place the circumferential roller 21 at the corresponding position of the through hole 24 of the accommodating cavity a, and then insert the pin shaft 25. It is easy and quick to operate.

The jacking unit 30, that is, the overall structure between the threaded jack and the rotary support base 20, as shown in Figure 2-3, includes a fixed ring 23 extending from the rotary support base 20 arranged vertically from top to bottom, and a fixed ring 23 form the tubular extension arm 31 that is fixedly connected, the bolt post 32 that forms coaxial threaded cooperation with the tubular extension arm 31 , and the base 40 that forms a thrust bearing rotary fit with the bolt post 32 . The guide block 32 a is arranged between the bolt column 32 and the frame body of the axial support seat 10 to cooperate with the guide groove 12 in a guide rail manner, so as to define the lifting path of the entire jacking unit 30 . A rocker portion 33 is arranged on the cylindrical surface of the bolt column 32 to cooperate with the ratchet pawl constituting one-way restraint, so that the movement of the bolt column 32 and the lifting operation of the rotary support base 20 can be realized through manual operation by manpower.

During the actual work of the utility model, at first, more than two of them are arranged in sequence along the axial direction of each pipe mother b, so as to realize the support function. Lower the support height of the rotary support base 20 to expose the axial support bases 10, and the planes where the support parts between the axial support bases 10 are at the same height. According to the diameter of the pipe nut b to be placed, the corresponding positions of the pin shaft 25 and the through hole 24 on each rotary support base 20 are determined. Before starting welding, first place the two pipe nuts b on each axial support seat 10 in sequence, make sure that the two pipe nuts b have the same height, and insert the pipe nut b at the end of one of the pipe nuts to be mated to connect the two pipe nuts b And the caliber is smaller than the pipe female connecting cylinder of each pipe female b. By measuring the distance between the adjacent end surfaces of the two pipe nuts b, determine the positional consistency between the two pipe nuts b, and then push one of the pipe nuts b without the pipe mother connecting cylinder along the axial guide wheel 11 of the axial support seat 10 Action, so that it is combined into the aforementioned pipe female connecting cylinder, at this time, the two pipe females b are sleeved in the pipe female connecting cylinder at the same time, and there is a welding distance between the two ends. After the position of the ends of the two pipe nuts b is determined, shake the handle part 33 and lift the rotary support seat 20. At this time, multiple devices should be carried out synchronously or sequentially in rotation, and the instrument should be used to monitor the lifting of the two pipe nuts b synchronously. coaxiality. Under the jacking up of the rotary support base 20, the two tube nuts b break away from the support surface of the support part of the axial support base 10, and replace the above support part under the jacking up of the contact surface of the rotary support base 20 to realize The contact surface of the rotary support seat 20 cooperates with the rotation of the pipe nut b. After the pipe nut b is completely separated from the support portion of the axial support seat 10 and the height position of the rotary support seat 20 is adjusted, the coaxiality of the two pipe nuts b is stable, and then the end welding operation can be performed. When welding the end of a piece of pipe mother b, directly apply rotational force to the pipe mother b at a predetermined speed in the circumferential direction, and the pipe mother b can move along the circumferential roller 21 of the rotary support seat 20, thereby realizing the pipe mother b Controllable speed rotation for one-time welding effect.

Due to the sensitivity of the rolling fit between the pipe mother b and the circumferential roller 21, the rotation operation of the pipe mother b can be guaranteed only by applying an appropriate force. It is even possible to fix the rotating handle on the outer b wall of the tube mother to further facilitate the application of force, which will not be repeated here.

For further understanding, the following implementation cases are added here:

Implementation case:

Using the traditional pipe mother support frame welding process:

Anhui Fuyang (Fuer) 500 kV substation adopts the welding method of the traditional support frame, and we have made statistics on the welding time of some of its pipe mother welding joints, as shown in Table 1 below:

Table 1: Fuyang (Fuer) 500 kV substation pipe mother welding time statistics

Through the above statistics, it is not difficult to find that the welding installation process of the traditional welding support frame takes about 2.5 hours for each welding head, and the welding of the entire 500kV area requires at least 15 days, which is an extremely long cycle.

The welding process using the universal adjustable pipe female welding bracket of the utility model:

Anhui Huainan Kongdian 500 kV substation is one of the key projects invested and constructed by Anhui Electric Power Company in 2014. The 500 kV main bus of this project adopts cable-stayed suspension tubular bus. Table 2 shows the statistics of tube mother materials in the 500 kV area of Kongdian Substation.

Table 2: Material statistics of pipe mother (LDRE-T6Φ250/230) in the 500kV area of Kongdian 500kV substation in Huainan:

According to the construction drawings, there are 9 pipe busbars with a span of 53m in the 500kV area, 3 pipes with a span of 56m, and 6 pipes with a span of 25m. According to the table of materials, there are a total of 42 welding points in the tube mother of the whole station. From the above, it can be seen that the welding workload of the Kongdian substation is large, and the Kongdian substation is a peak summer project, and the construction period is relatively tight.

We used the test structure of this utility model during the welding construction of Kongdian variable tube female, and made statistics on the crimping time of 42 welding heads, and obtained that after using the universal adjustable tube female welding bracket of the utility model Please refer to Table 3 for the welding time of pipe mother.

Table 3: Statistic of pipe mother welding time after the general-purpose adjustable pipe mother welding bracket is used in Huainan Kongdian 500 kV substation

According to the statistics of the welding time of the pipe mother: compared with the traditional welding support frame, the utility model can reduce the welding time of each welding joint to 1.35h on average, shorten the average welding time by nearly half, and its total construction period also increases The sudden reduction, the effect is remarkable.

After the quality inspectors of the project department and professional supervision engineers inspected the welding place of the pipe mother after welding, all indicators met the requirements of the acceptance specification, and the pass rate reached 100%, reaching the expected goal.

Through the above-mentioned embodiments, it can be seen that the utility model has pure mechanical operation, high ease of operation, good working stability, strong adjustment accuracy, high controllability of the translation and rotation range of the tube mother, low cost, small size and easy to carry and many other advantages. The time for welding a joint is shortened to about 1.4h, and at the same time, there is no need to perform additional operations such as lifting during welding, which realizes online one-time welding forming, avoids the phenomenon of arc break, and the one-time welding rate reaches 100%. At the same time, when the tube nut is moving, the support frame will not cause scratches or scratches on the outer wall of the tube nut, and it can also be applied to different types of tube nuts with different diameters. The utility model has reliable and stable work and broad market prospect.

Claims (10)

1. A general-purpose adjustable pipe nut welding bracket, comprising an axial support seat (10) for supporting the pipe nut and guiding the axial displacement of the pipe nut, arranged on the axial support seat (10) There are a plurality of axial guide wheels (11), the pipe nut is erected on the axial guide wheel (11), and the outer rims of each axial guide wheel (11) cooperate to form a supporting part for directly contacting and guiding the axial movement of the pipe mother; It is characterized in that: the general-purpose adjustable pipe female welding bracket also includes a lifting mechanism located beside the axial support seat (10) that can be used for lifting and lowering at a specified height, and a rotary support seat (20) is arranged on the lifting mechanism. The roller surfaces of the multiple circumferential rollers (21) on the slewing support seat (20) constitute the contact surface for erecting and rotating the pipe nut; the lowest height of the contact surface after the lifting mechanism is lowered is lower than that of the axial support seat (10) The support height of the pipe nut at the upper support portion, the highest height of the contact surface after the lifting mechanism is lifted is higher than the support height of the pipe mother at the support portion of the axial support seat (10). 2. The general-purpose adjustable pipe female welding bracket according to claim 1, characterized in that: the shape of the rotary support seat (20) is in the shape of a "V" frame, and the rim of the circumferential roller (21) is at least protruding It is arranged on the inner side walls of the two oblique arms (22) of the rotary support seat (20) forming a "V" frame shape, and the axes of the circumferential rollers (21) are arranged parallel to the direction of the axis of the tube mother; A jacking unit (30) that lifts the slewing support base (20) to generate a lifting action, and the jacking unit (30) is a hydraulic jacking structure and/or a mechanical jacking structure. 3. The universal adjustable pipe female welding bracket according to claim 2, characterized in that: the jacking unit (30) is a threaded jack, and the bottom of the rotary support seat (20) extends downwards with an extension arm (31 ), the extension arm (31) is in the shape of a pipe sleeve and the inner wall at the bottom end has an internal thread, and the jacking unit (30) includes a bolt column (32) for forming a threaded fit with the extension arm (31), the bolt column ( 32) The base (40) at the bottom of the lifting mechanism is fixed below and forms a rotation fit with the base (40); the jacking unit (30) also includes a horizontally arranged rocker portion (33) that is convenient to hold, The lower column surface of the bolt column (32) is arranged with straight teeth along the circumferential ring. The tooth surface of the straight teeth is parallel to the axis of the bolt column. 33) A ratchet pawl is arranged at its front end and cooperates with the above-mentioned straight teeth of the bolt column (32) to form a ratchet pawl that engages with each other and has one-way restraint. 4. The universal adjustable pipe female welding bracket according to claim 3, characterized in that: a hole is opened on the base (40), and the bottom end of the bolt column (32) is pierced through the hole, and the hole A thrust bearing (41) is arranged at the end and/or in the hole, and the bolt column (32) and the hole form a bearing rotation fit. 5. The general-purpose adjustable pipe female welding bracket according to claim 3 or 4, characterized in that: a guide groove (12) is horizontally recessed on one side of the outer wall of the axial support seat (10), and the guide groove (12) The length direction of the groove is located in the vertical direction; the side of the bolt column (32) extends horizontally to the guide groove (12) with a guide block (32a), and the guide block (32a) and the guide groove (12) form a vertical Orientation mate relationship. 6. The universal adjustable pipe female welding bracket according to claim 3 or 4, characterized in that: the bottom end of the rotary support seat (20) protrudes downward along the vertical direction with a fixed ring (23), and the extension arm (31) The upper end is sleeved in the fixed ring (23); the fixed ring (23) runs through the ring body to arrange threaded holes for installing the tightening screws, and the upper end of the extension arm (31) and the fixed ring (23) form a tight nail Screw fit. 7. The universal adjustable pipe female welding bracket according to claim 2, 3 or 4, characterized in that: the two oblique arms (22) constituting the "V" frame-shaped rotary support seat (20) are both An accommodation cavity (a) for placing the circumferential rollers (21) is provided, the accommodation cavity (a) is arranged along the length direction of the oblique arm (22), and multiple And a through hole (24) symmetrical on one side, the through hole (24) is interspersed with a detachable pin shaft (25), and the pin shaft (25) constitutes the rotating shaft part of the circumferential roller (21). 8. The universal adjustable pipe female welding bracket according to claim 2, 3 or 4, characterized in that: the two oblique arms (22) forming the "V" frame-shaped rotary support seat (20) The included angle is 60°. 9. The universal adjustable pipe female welding bracket according to claim 1 or 2 or 3 or 4, characterized in that: the shape of the axial support seat (10) is in the shape of a "V" frame, and the axial guide wheel (11) The shape is cylindrical and the shaft axis is arranged perpendicular to the axis of the pipe mother; the two support arms (13) forming the "V" frame-shaped axial support seat (10) constitute the wheel shaft of the axial guide wheel (11) And the angle formed by the two axles is 60°. 10. The universal adjustable pipe female welding bracket according to claim 9, characterized in that: the materials used for the wheel surfaces of the axial guide wheel (11) and the circumferential roller (21) are wear-resistant resin materials .