CN114799707A

CN114799707A - Portable flange plate welding equipment in chemical pipeline installation engineering

Info

Publication number: CN114799707A
Application number: CN202210658513.6A
Authority: CN
Inventors: 左广玲; 李秉轲; 吴可量; 曹英寒; 叶红勇; 李入林
Original assignee: Nanyang Institute of Technology
Current assignee: Nanyang Institute of Technology
Priority date: 2022-06-11
Filing date: 2022-06-11
Publication date: 2022-07-29

Abstract

The invention discloses portable flange plate welding equipment in chemical pipeline installation engineering, which comprises: a main body portion configured in a sealed cylindrical shape having a cylindrical cavity provided therein; the main body part is provided with a flange fixing part and a steel pipe fixing part; the flange fixing part comprises a cross-shaped frame fixedly sleeved on the main body part, moving rods are arranged on the end faces of four support legs of the cross-shaped frame in a sliding mode, and limiting short columns are fixedly arranged on the end faces, close to the main body part, of one ends, far away from the cross-shaped frame, of the four moving rods; the steel pipe fixing part comprises a plurality of abutting blocks arranged around the main body part in a surrounding mode, and two inclined rods are arranged between the plurality of abutting blocks and the main body part in an inclined and symmetrical mode; the main body part is provided with an air pressure control piece for synchronously controlling the flange fixing part and the steel pipe fixing part. When the flange plate needs to be welded, the flange plate and the steel pipe can be conveniently and quickly aligned and fixed, the use is convenient, and meanwhile, the whole device is light in weight and convenient to carry.

Description

Portable flange plate welding equipment in chemical pipeline installation engineering

Technical Field

The invention relates to auxiliary flange steel pipe welding equipment, in particular to portable flange plate welding equipment in chemical pipeline installation engineering.

Background

The following problems often exist in the manual welding process of the flange plate and the steel pipe: firstly, the welding efficiency is low; secondly, welding money needs to fix the flange and the steel pipe firstly, and manual alignment is needed. Aiming at the problem of low manual welding efficiency, automatic welding equipment is proposed at present, the welding efficiency of the flange plate is improved, but before welding, the automatic welding equipment needs to align and fix the flange plate and the steel pipe manually, the process is generally realized by means of an auxiliary structure for welding, a support can be adopted for fixing and other modes, but because the fixing generally adopts a mechanical structure, the fixing structure is more, the integral weight is heavier, and the carrying is inconvenient; patent document No. CN112894252A discloses a welding assembly tool for a pressure-bearing pipeline of a hydrogen production device and patent document No. CN110480251A discloses a positioning welding device for flanges and steel pipes, which are suitable for multiple specifications, both of the above two patent documents disclose clamping and fixing different pipelines, but both of the above two patent documents achieve adjustment through a threaded structure, firstly, the threaded structure can lead to the weight of the whole body to be heavy, and meanwhile, the adjustment range of the threaded structure is related to the length of the threaded structure, and the limitation is large; meanwhile, the patent document with the national publication number of CN113427179B discloses a portable flange welding device in chemical pipeline installation engineering, which comprises a welding device body, wherein the bottom surface of the welding device body is provided with a welding auxiliary mechanism, an inner concave surface of a first arc plate is placed on a pipeline before a flange is welded, the first arc plate is fixed on the pipeline by using a rope, a third limiting plate is pushed forwards, an installation block is placed into a first chute, a second limiting block is embedded into a concave opening of the inner back wall surface of a connecting plate, when the flange and the pipeline are welded by the welding device body, gas in the second chute is heated by high temperature generated during welding, the gas is heated and expanded to push the first sliding plate to slide forwards in the second chute, the first sliding plate drives the second sliding plate to pull a second pressing rod and a pressing rod on the first pulling rod, the flange is pressed on the end surface of the pipeline by providing pulling force by the first sliding plate, and the welding effect is prevented from being reduced due to the relative displacement of the flange and the pipeline during welding, but the device is comparatively troublesome when using, and the gas when needing to utilize the welding realizes fastening fixed action, and the unable steel pipe and the flange that adapt to different specifications of whole device simultaneously, whole device weight is heavier not convenient for carry.

Disclosure of Invention

In view of the above problems in the prior art, the present invention is directed to a portable flange welding apparatus for chemical pipeline installation, which is portable and can accommodate flanges and steel pipes of different specifications without pre-alignment.

In order to achieve the above purpose, the invention provides the following technical scheme: the utility model provides a portable ring flange welding equipment among chemical pipeline installation engineering, includes:

a main body portion configured in a sealed cylindrical shape having a cylindrical cavity provided therein; the main body part is provided with a flange fixing part and a steel pipe fixing part;

the flange fixing part comprises a cross-shaped frame fixedly sleeved on the main body part, moving rods are arranged on the end faces of four support legs of the cross-shaped frame in a sliding mode, and limiting short columns are fixedly arranged on the end faces, close to the main body part, of the ends, far away from the cross-shaped frame, of the four moving rods;

the steel pipe fixing part comprises a plurality of abutting blocks arranged around the main body part in a surrounding mode, two inclined rods are symmetrically arranged between the abutting blocks and the main body part in an inclined mode, the two inclined rods are rotatably connected with the abutting blocks, one inclined rod is rotatably connected with one end, far away from the flange fixing part, of the main body part, an annular block is sleeved on the main body part in a sliding mode, the other inclined rod is rotatably connected with the annular block, a cylindrical air bag is further sleeved on the main body part in a sleeved mode, the cylindrical air bag is arranged in a corrugated pipe shape, one end of the cylindrical air bag is fixedly connected with the annular block, and the other end of the cylindrical air bag is fixedly connected with the main body part;

the main body part is provided with an air pressure control part for synchronously controlling the flange fixing part and the steel pipe fixing part.

Preferably, the pneumatic control member includes an inflating piston sealingly slidably disposed in the main body portion, an operating handle is disposed on a side of the main body portion adjacent to the flange fixing portion, and the operating handle is fixedly connected to the inflating piston via a control rod extending through the main body portion so that the position of the inflating piston can be controlled by moving the operating handle.

Preferably, the cross-shaped frame is a hollow structure, four fixing rods are fixedly arranged in the cross-shaped frame corresponding to four support legs respectively, the moving rod is arranged to be of a hollow rod structure and is sleeved on the fixing rods in a sliding mode, a round hole groove is formed in one end, close to the moving rod, of the fixing rod, the round hole groove in the fixing rod is communicated with the main body through a communicating pipe, a one-way valve is fixedly connected to the connecting pipe, so that the communicating pipe can only allow gas to enter the round hole groove from the main body, a first round hole communicated with the outside is formed in one end, close to the flange fixing portion, of the main body, and a second one-way valve opposite to the one-way valve in direction is fixedly arranged in the first round hole in a sealed mode.

Preferably, air cavities communicated with the interior of the moving rod are arranged in the four abutting blocks, annular air bags are fixedly sleeved on the abutting blocks and communicated with the air cavities, and the arc-shaped side walls of the annular air bags are provided with concaves.

Preferably, one end of the cylindrical airbag, which is far away from the flange fixing part, is communicated with the inside of the main body part, and a one-way valve III is fixedly arranged at the communication position, one end of the main body part, which is far away from the flange fixing part, is fixedly provided with a round hole II communicated with the outside so that gas can only enter the cylindrical airbag from the inside of the main body part, and a one-way valve IV with the direction opposite to that of the one-way valve III is fixedly arranged in the round hole II.

Preferably, the main body part is fixedly provided with a gas release valve at one end close to the flange connecting part, and the cylindrical air bag and the plurality of circular hole grooves are fixedly connected and communicated with the gas release valve through a conduit.

Preferably, one end of the main body part, which is far away from the flange fixing part, is also fixedly provided with a propping air bag, the propping air bag is annular, and the outer surface of the propping air bag is a rough surface.

Preferably, the end surfaces, far away from the main body part, of the plurality of abutting blocks are provided with arcs and anti-skid grains.

Preferably, the control rod is slidably sleeved with a grip, and the grip is fixedly connected with the main body part.

Compared with the prior art, the portable flange plate welding equipment in the chemical pipeline installation engineering provided by the invention adopts a structure similar to an inflator to form a drive for the limiting structure. Compared with the traditional flange plate welding equipment, the pneumatic flange plate welding equipment has the advantages that firstly, the pneumatic fixed integral structure is adopted, compared with the existing common mechanical fixed structure, the complex structure is not required to be arranged, meanwhile, the transmission structure is less, and the integral weight is lighter. Meanwhile, the flexibility of air pressure driving limiting is utilized to fix flanges and steel pipes with different specifications, and the device can synchronously fix the flanges and the steel pipes through single inflating operation in the using process, so that when the device is used for fixing the steel pipes and the flanges, the flanges can be firstly sleeved on the main body part, the limiting short columns enter the mounting holes in the flanges, then the main body part is inserted into the steel pipes, and then the fixing effect can be realized by operating an inflator, after the device is completely fixed, the main body part is automatically positioned on the central axis of the steel pipes due to the structural arrangement for realizing the fixing effect on the steel pipes, namely, the flanges are also limited at the positions with the same central axis as the steel pipes, and the device is more convenient to operate aiming at the problem of inconvenient operation of the conventional flange welding equipment, the flange plate and the steel pipe can be quickly fixed; the device is more quick and effective and is applicable to different specifications and is wholly portable.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

This document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology.

Drawings

Fig. 1 is a schematic structural diagram of a portable flange welding device in chemical pipeline installation engineering according to the present invention.

Fig. 2 is a schematic structural diagram of another view angle of the portable flange welding device in chemical pipeline installation engineering according to the present invention.

Fig. 3 is a schematic structural diagram of another view angle of the portable flange welding device in chemical pipeline installation engineering according to the present invention.

Fig. 4 is a schematic diagram of the internal structure of the cross-shaped frame of the portable flange welding device in the chemical pipeline installation engineering.

Fig. 5 is a schematic cross-sectional view of a portable flange welding device in chemical pipeline installation engineering according to the present invention.

Description of the main reference numerals:

1-main body part, 2-flange fixing part, 3-steel pipe fixing part, 4-air pressure control part, 5-air release valve, 6-abutting air bag, 7-holding handle, 21-cross frame, 22-moving rod, 23-limiting short column, 24-fixed rod, 25-communicating pipe, 26-one-way valve I, 27-annular air bag, 28-one-way valve II, 31-abutting block, 32-inclined rod, 33-annular block, 34-barrel air bag, 35-one-way valve IV, 36-one-way valve III, 41-inflating piston, 42-operating handle and 43-control rod.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present disclosure with reference to the accompanying drawings of the embodiments of the present disclosure. It is to be understood that the embodiments described are only a few of the presently disclosed embodiments, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of the disclosure.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of the terms "comprising" or "including" and the like in the present disclosure is intended to mean that the elements or items listed before the term cover the elements or items listed after the term and their equivalents, but not to exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

To maintain the following description of the disclosed embodiments of the present invention clear and concise, a detailed description of known functions and known components has been omitted from the present disclosure.

As shown in fig. 1 to 5, an embodiment of the present invention provides a portable flange welding device in chemical pipeline installation engineering, including:

a main body part 1 configured in a sealed cylindrical shape having a cylindrical cavity provided therein; at present, most of welding for steel pipe flanges is performed manually, the welding efficiency is often low when the welding operation is performed manually, and the welding device cannot meet the production requirements when the welding device is used for assembly line type work; aiming at the problem of manual welding, an automatic welding device is developed, so that the welding quality and the welding efficiency are improved to a certain extent, but the automatic welding device for the steel pipe flange needs to fix a steel pipe firstly, then align and fix the flange on the steel pipe, and finally clamp the flange on automatic welding equipment for welding. However, the flange plate and the steel pipe are not conveniently and quickly positioned in the axial direction and the radial direction manually, the current alignment and fixing steps are complicated, and although the welding efficiency is accelerated by adopting an automatic welding mode subsequently, the complicated alignment and fixing steps still cause the overall operation efficiency to be low; particularly, when more steel pipe flanges are welded, because the number of the steel pipes and the flanges is large, the steel pipe flanges need to be spliced and welded frequently and then subjected to automatic welding operation, in the process, the structure for aligning and fixing the flanges and the steel pipes needs to be light and portable, the whole body has a portable function, excessive weight cannot be increased after the steel pipes and the flanges are aligned and fixed, and the steel pipes and the flanges which are fixed can be moved to automatic welding equipment manually; in the equipment, a flange fixing part 2 and a steel pipe fixing part 3 are arranged on a main body part 1, the flange fixing part 2 comprises a cross-shaped frame 21 fixedly sleeved on the main body part 1, moving rods 22 are arranged on the end faces of four support legs of the cross-shaped frame 21 in a sliding manner, a short limiting column 23 is fixedly arranged on the end face, close to the main body part 1, of one end, far away from the cross-shaped frame 21, of each moving rod 22, a plurality of through mounting holes are uniformly arranged on the structure of the existing flange in a surrounding manner, the mounting holes are arranged around the central axis of the flange, the four short limiting columns 23 are embedded into the mounting holes in the four flanges, the positions of the four moving rods 22 are limited simultaneously, and the flange can be fixed on the main body part 1, the cross-shaped frame 21 can be adjusted according to requirements, and the number of the support legs of the cross-shaped frame is matched with the number of the mounting holes on the flange; in the device, the steel pipe fixing part 3 comprises a plurality of abutting blocks 31 arranged around a main body part 1 in a surrounding manner, two inclined rods 32 are obliquely and symmetrically arranged between the abutting blocks 31 and the main body part 1, the two inclined rods 32 are rotatably connected with the abutting blocks 31, one inclined rod 32 is rotatably connected with one end of the main body part 1, which is far away from a flange fixing part 2, an annular block 33 is sleeved on the main body part 1 in a sliding manner, the other inclined rod 32 is rotatably connected with the annular block 33, a cylindrical air bag 34 is further sleeved on the main body part 1, the cylindrical air bag 34 is in a corrugated pipe shape, one end of the cylindrical air bag 34 is fixedly connected with the annular block 33, the other end of the cylindrical air bag 34 is fixedly connected with the main body part 1, the cylindrical air bag 34 can abut against the inner wall of the steel pipe through the diffusion of the abutting blocks 31 in the direction far away from the main body part 1, the steel pipe and the main body part 1 are fixed, and the main body part 1 is fixed on the central axis of the steel pipe due to the characteristic of the fixing structure, when the device is used, the flange is abutted against the welding position on the steel pipe, and then the position relation between the flange and the main body part 1 and the position relation between the steel pipe and the main body part 1 are limited, so that the flange and the steel pipe can be coaxially and closely fixed, the whole body can be conveniently moved, the subsequent automatic welding operation can be conveniently carried out, and the welding surface is not shielded;

in addition, the pneumatic control device comprises a pneumatic control element 4 which is arranged on the main body part 1 and is used for synchronously controlling the flange fixing part 2 and the steel pipe fixing part 3, the structure which is commonly used at present and is used for fixing the flange and the steel pipe is usually a mechanical structure to realize the fixing effect, the flange and the steel pipe are required to be synchronously fixed, the mechanical structure is easily arranged more, the weight of the whole device is heavier, the whole device is inconvenient to carry, and aiming at the problem, a limiting mechanism in the device is driven in a pneumatic mode, firstly, the limiting effect can be realized by the pneumatic structure, meanwhile, the weight of the whole device can be reduced by the structure driven pneumatically, the portability of the whole device is ensured, therefore, the pneumatic control element 4 comprises a pumping piston 41 which is arranged in the main body part 1 in a sealing and sliding manner, and one side of the main body part 1, which is close to the flange fixing part 2, is provided with an operating handle 42, the operating handle 42 is fixedly connected with the inflating piston 41 through a control rod 43 penetrating through the main body part 1 so that the position of the inflating piston 41 can be controlled by moving the operating handle 42; when the operation handle 42 is controlled, the inflating piston 41 can be driven to slide in the main body part 1, so that the structural principle of the inflator is realized, the air pressure control part 4 is a main driving structure of the whole equipment, the operation is convenient for people, the air pressure control part is matched with the long cylinder shape of the main body part 1, and the inflating structure is arranged in the main body part 1, so that the integral slender state can be ensured firstly, and meanwhile, the air pressure control part is also combined with a fixing structure, so that the integral volume is reduced;

in order to control the positions of the four moving rods 22 in the moving process of the inflating piston 41, that is, the moving rods 22 can be driven to move by air pressure, the cross-shaped frame 21 is a hollow structure, four fixing rods 24 are respectively and fixedly arranged in the cross-shaped frame 21 corresponding to four support legs, the moving rods 22 are hollow rod structures and are slidably sleeved on the fixing rods 24, one ends of the fixing rods 24, which are close to the moving rods 22, are provided with circular hole grooves, the circular hole grooves in the fixing rods 24 are fixedly connected and communicated with the main body part 1 through communicating pipes 25, when the air in the main body part 1 is compressed into the circular hole grooves, the air pressure in the circular hole grooves and the hollow core in the moving rods 22 is synchronously increased, the moving rods 22 can be ejected outwards, but the air is sucked back when the inflating piston 41 is reset, in some embodiments, the connecting structure of the moving rods 22 and the cross-shaped frame 21 can be designed into a multi-stage pneumatic telescopic rod structure, further increasing the distance of inflation extension, thereby making the structure occupied space smaller when not inflating, reducing the overall volume, in order to ensure the correct performance of the inflation operation, the connecting pipe 25 is fixedly connected with a one-way valve 26 so that the communicating pipe 25 can only let the gas enter the circular hole groove from the main body part 1, one end of the main body part 1 close to the flange fixing part 2 is provided with a circular hole I communicated with the outside, the circular hole I is internally and fixedly provided with a one-way valve II 28 in the direction opposite to the one-way valve I26, when the inflation piston 41 moves towards the direction far away from the flange fixing part 2, the gas can be sucked into the main body part 1 through the one-way valve II 28, then the inflation piston 41 moves towards the direction close to the flange fixing part 2, at this time, the one-way valve II 28 does not guide the gas outwards, therefore, the gas enters the circular hole groove through the one-way valve I26, and the inflation piston 41 reciprocates, the operation of blowing air continuously over the plurality of circular hole grooves can be realized, so that the four moving rods 22 are synchronously driven to expand and move outwards, and the limiting ends 23 on the moving rods 22 are placed in the mounting holes on the flange, so that the flange can be tightly abutted and fixed; in order to further increase the fixing effect on the flange, namely, to make the limiting effect between the flange and the main body part 1 more stable, air chambers communicated with the inside of the moving rod 22 are arranged in the four abutting blocks 31, the annular air bag 27 is fixedly sleeved on the abutting blocks 31 and communicated with the air chambers, after air is injected into the circular hole grooves, the air can enter the air chambers in the limiting short columns 23 through the hollow inside of the moving rod 22, then the annular air bag 27 is expanded, the annular air bag 27 can play a higher limiting effect on the flange after being expanded, meanwhile, the arc-shaped side wall of the annular air bag 27 is provided with an indent, the annular air bag 27 is I-shaped after being expanded, so that the mounting holes on the flange are more matched, the fixing effect on the flange is higher, in the invention, in order to further ensure the firmness of the flange when being fixed, the existing tools such as limiting bolts or positioning pins and the like can be arranged on the annular block 33 and the moving rod 22 through threads, the flange and the steel pipe are locked after being fixed at proper positions under the action of air pressure, so that falling off during welding is avoided, and firmness is further ensured;

in the invention, in order to ensure that the equipment can be rapidly disassembled from the steel pipe and the flange after the flange steel pipe is welded, the end of the main body part 1 close to the flange connecting part 2 is fixedly provided with the air release valve 5, the cylindrical air bag 34 and the plurality of circular hole grooves are fixedly connected and communicated with the air release valve 5 through the guide pipe, and the air in the cylindrical air bag 34 and the plurality of circular hole grooves can be synchronously released by operating the air release valve 5, so that the limiting function between the equipment and the flange as well as the steel pipe can be relieved, the whole equipment is convenient to disassemble, and the whole device is more convenient to operate in the whole welding operation; in the using process of the equipment, in order to further increase the effect of the whole equipment, firstly, one end of the main body part 1, which is far away from the flange fixing part 2, is fixedly provided with a propping air bag 6, the propping air bag 6 is in an annular shape, the outer surface of the propping air bag 6 is a rough surface, the propping air bag 6 can be inflated while the barrel-shaped air bag 34 is inflated, and after the propping air bag 6 expands and is attached to the inner wall of the steel pipe, the rough outer surface of the propping air bag is closely attached to the inner wall of the steel pipe to generate larger friction force, so that the limiting effect between the equipment and the steel pipe is better, and the equipment is more difficult to slip from the steel pipe; meanwhile, the end faces, far away from the main body part 1, of the plurality of abutting blocks 31 are provided with arcs and anti-skid threads, the limiting effect on the steel pipe is further increased, the equipment part in the steel pipe is long, the fixing effect can be fully achieved, the position between the limiting flange and the steel pipe is guaranteed, the control rod 43 is sleeved with the holding handle 7 in a sliding mode, the holding handle 7 is fixedly connected with the main body part 1, in the device, the holding handle 7 can be directly held by one hand to operate the whole equipment, the other control operation handle 42 is used for inflating, and the whole equipment is convenient to use; whole equipment utilizes atmospheric pressure to produce the structural change at the in-process that uses, can realize the chucking action by less size grow, and whole equipment can be firm fix inside the steel pipe simultaneously, and stability is higher, and whole equipment finishes using the back in addition, loses heart the operation, and whole equipment's volume can carry out the reduction on a large scale to whole equipment's portable effect has been increased.

While there has been described what are believed to be the preferred embodiments of the present invention, it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the principles of the invention, and it is intended to cover all such changes and modifications as fall within the true scope of the invention.

Claims

1. The utility model provides a portable ring flange welding equipment among chemical pipeline installation engineering which characterized in that includes:

a main body part (1) configured in a sealed cylindrical shape having a cylindrical cavity provided therein; the main body part (1) is provided with a flange fixing part (2) and a steel pipe fixing part (3);

the flange fixing part (2) comprises a cross-shaped frame (21) fixedly sleeved on the main body part (1), moving rods (22) are arranged on the end faces of four support legs of the cross-shaped frame (21) in a sliding mode, and limiting short columns (23) are fixedly arranged on the end faces, close to the main body part (1), of the ends, far away from the cross-shaped frame (21), of the four moving rods (22);

the steel pipe fixing part (3) comprises a plurality of supporting blocks (31) arranged around a main body part (1) in a surrounding mode, two inclined rods (32) are arranged between the supporting blocks (31) and the main body part (1) in an inclined and symmetrical mode, the two inclined rods (32) are rotatably connected with the supporting blocks (31), one of the inclined rods (32) is rotatably connected with one end, far away from a flange fixing part (2), of the main body part (1), an annular block (33) is sleeved on the main body part (1) in a sliding mode, the other inclined rod (32) is rotatably connected with the annular block (33), a cylindrical air bag (34) is further sleeved on the main body part (1), the cylindrical air bag (34) is arranged in a corrugated pipe shape, one end of the cylindrical air bag (34) is fixedly connected with the annular block (33), and the other end of the cylindrical air bag (34) is fixedly connected with the main body part (1);

the main body part (1) is provided with an air pressure control part (4) for synchronously controlling the flange fixing part (2) and the steel pipe fixing part (3).

2. The apparatus according to claim 1, wherein the pneumatic control member (4) comprises an inflating piston (41) sealingly slidably arranged in the main body portion (1), wherein the main body portion (1) is provided with an operating lever (42) at a side thereof adjacent to the flange fixing portion (2), and wherein the operating lever (42) is fixedly connected to the inflating piston (41) by means of a control rod (43) extending through the main body portion (1) such that the position of the inflating piston (41) can be controlled by moving the operating lever (42).

3. The device according to claim 1, characterized in that the cross-shaped frame (21) is provided as a hollow structure, four fixing rods (24) are respectively and fixedly arranged in the cross-shaped frame (21) corresponding to the four support legs, the movable rod (22) is arranged into a hollow rod structure and is sleeved on the fixed rod (24) in a sliding way, one end of the fixed rod (24) close to the movable rod (22) is provided with a round hole groove, the round hole groove in the fixing rod (24) is fixedly connected and communicated with the main body part (1) through a communicating pipe (25), a one-way valve I (26) is fixedly connected on the connecting pipe (25) so that the communicating pipe (25) can only allow gas to enter the circular hole groove from the main body part (1), one end of the main body part (1) close to the flange fixing part (2) is provided with a first round hole communicated with the outside, and a second check valve (28) opposite to the first check valve (26) in direction is fixedly arranged in the round hole I in a sealing way.

4. The device according to claim 1, characterized in that air cavities communicated with the interior of the moving rod (22) are arranged in each of the four abutting blocks (31), an annular air bag (27) is fixedly sleeved on each abutting block (31), the annular air bags (27) are communicated with the air cavities, and the arc-shaped side walls of the annular air bags (25) are provided with concaves.

5. The device as claimed in claim 1, wherein one end of the cylindrical air bag (34) far away from the flange fixing part (2) is communicated with the inside of the main body part (1) and fixedly provided with a one-way valve III (36) at a communication position, one end of the main body part (1) far away from the flange fixing part (2) is fixedly provided with a round hole II communicated with the outside so that gas can only enter the cylindrical air bag (34) from the inside of the main body part (1), and the round hole II is fixedly provided with a one-way valve IV (35) in the opposite direction of the one-way valve III (36).

6. The apparatus according to claim 1, wherein the main body (1) is fixedly provided with a release valve (5) at an end close to the flange connecting portion (2), and the cylindrical air bag (34) and the plurality of circular hole grooves are fixedly connected and communicated with the release valve (5) through a conduit.

7. The device according to claim 1, characterized in that the main body part (1) is further fixedly provided with a resisting air bag (6) at the end far away from the flange fixing part (2), the resisting air bag (6) is provided with a ring shape, and the outer surface of the resisting air bag (6) is provided with a rough surface.

8. The equipment as claimed in claim 1, wherein the end surfaces of the plurality of resisting blocks (31) far away from the main body part (1) are provided with arc shapes and are provided with anti-skid grains.

9. The device according to claim 2, characterized in that the control rod (43) is slidably sleeved with a grip (7), and the grip (7) is fixedly connected with the main body (1).