CN212657233U

CN212657233U - Stainless steel pipeline argon arc welding pipe internal inflation plugging device

Info

Publication number: CN212657233U
Application number: CN202021251760.7U
Authority: CN
Inventors: 杨忠坤; 王婷婷; 马信武; 訾士才; 李宁; 马文良; 田鹏; 车铭; 马聪; 侯金良; 王添; 刘雪竹; 马春程
Original assignee: Jilin Dunhua Pumped Storage Co ltd; State Grid Xinyuan Group Co Ltd; State Grid Corp of China SGCC
Current assignee: Jilin Dunhua Pumped Storage Co ltd; State Grid Xinyuan Group Co Ltd; State Grid Corp of China SGCC
Priority date: 2020-07-01
Filing date: 2020-07-01
Publication date: 2021-03-05
Anticipated expiration: 2030-07-01

Abstract

The utility model relates to an electric power industry multiplexer utensil field, promptly a nonrust steel pipeline argon arc welding intraductal plugging device that aerifys. The quick connector comprises a quick connector, a large end plate, a metal pipe, a bolt and a small end plate clamped by the nut and the bolt which are welded in sequence, wherein gaskets are padded on the bolt and the nut on two sides of the small end plate, and an inflation hole is formed in the metal pipe; the center of the big end plate is provided with a through hole. The big end plate is provided with a sealing groove, and an O-shaped sealing ring is arranged in the sealing groove. The device is simple to manufacture, simple and easy to assemble and disassemble, saves cost, reduces workload, ensures the forming of the inner surface of the welding line and the integral quality of the welding line, and improves the safety of equipment operation.

Description

Stainless steel pipeline argon arc welding pipe internal inflation plugging device

Technical Field

The utility model relates to an electric power industry multiplexer utensil field, promptly a nonrust steel pipeline argon arc welding intraductal plugging device that aerifys.

Background

In the prior art, a hydraulic hoist system of a tail gate chamber of a power station is used for opening and closing a gate under the normal working condition of a tail water accident gate and emergently closing the gate under the accident working condition to realize the conduction and the cut-off of tail water, and the hydraulic hoist system comprises a set of pump station, four sets of hydraulic control valve sets, four sets of hydraulic cylinders, an oil pipeline and the like. The total length of an oil pipeline is 504 meters, phi 50 stainless steel pipes are selected, each section of stainless steel pipe is 3 meters long, convex rings are arranged at two ends of the pipe, counter bores matched with the convex rings are arranged on flanges, two ends of each two stainless steel pipes are tightly propped against the two convex rings through the flanges and 4 flange bolts to be sequentially connected in a sealing mode, each section of stainless steel pipe is divided into a flange long pipe and a flange short pipe, the flange long pipe and the flange short pipe are welded into a section of stainless steel pipe through on-site argon arc welding, in the argon arc welding bottoming process, the steel pipe needs to be filled with argon, the inner surface of a welding seam is prevented from being oxidized, and the traditional argon filling method.

When the pipe diameter is small or the pipeline is short, the method of integrally filling argon is adopted, two ends of the pipeline are sealed by using the adhesive tape, argon is filled into the whole pipeline from one end of the pipe, each pipeline is 3 meters long, if the method of integrally filling argon is adopted, the defects of difficulty in sealing, long argon filling time, large argon consumption, high cost investment and the like exist, simultaneously, flange surfaces at two ends of the pipeline are sealed by using the adhesive tape, the flange surfaces are polluted, a process is additionally added for cleaning residual adhesive, the workload is increased, and the argon is integrally filled. One end of the exhaust hole is added, so that two problems possibly exist in the construction process, firstly, the size of the exhaust hole which is opened every time is different, the argon concentration in the pipe is directly influenced, and the welding quality is influenced; and secondly, the argon gas flow influences the exhaust hole to be enlarged or the sealing adhesive tape to fall off, so that the argon concentration is changed, and the welding quality is influenced.

When the pipe diameter is larger or the pipeline is longer, a local argon filling method is adopted, water-soluble paper is pasted at the positions of 150mm on two sides in the welding opening of the pipeline respectively to form a group of temporary blocking plates, then an argon filling needle is adopted to fill argon into the pipe at the opening gap, and the method has the defects that the method is not suitable for small-aperture pipelines, the water-soluble paper is difficult to paste, the pipelines are polluted and the like. The diameter phi 50 of the flange pipe is a small-caliber pipeline, the inner space is narrow, if local argon filling is adopted, water-soluble paper is difficult to paste, and because an oil conveying pipeline is adopted, subsequent pickling, passivation and oil flow washing are only carried out, the water-soluble paper and paste cannot be thoroughly removed, additional working procedures are required to be added for cleaning the water-soluble paper and the paste, the workload is increased, if residues exist, the pipeline is polluted, and hidden dangers are buried in the subsequent safe and stable operation of a hydraulic hoist system.

In conclusion, the hydraulic hoist system has many pipelines and large welding amount, and the traditional argon filling method has the disadvantages of complicated operation, time and labor waste, low welding quality and low working efficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the aforesaid not enough and provide an it is with low costs, work load is little, welding quality is high aerify plugging device in stainless steel pipeline argon arc welding pipe.

The technical solution of the utility model is that: an internal inflation plugging device for a stainless steel pipeline argon arc welding pipe comprises a quick connector, a large end plate, a metal pipe, a bolt and a small end plate clamped by a nut and the bolt which are welded in sequence, wherein an inflation hole is formed in the metal pipe; the center of the big end plate is provided with a through hole.

In the above-mentioned scheme, the first step of the method,

the big end plate is provided with a sealing groove, and an O-shaped sealing ring is arranged in the sealing groove.

And gaskets are padded between the small end plate and the bolts and nuts on the two sides.

The utility model has the advantages that:

1. the manufacturing is simple, and the metal pipe, the quick connector, the large end piece, the small end piece and the set of bolt are connected by welding to complete the manufacturing.

2. The device is easy to assemble and disassemble, the rapid assembly and disassembly of the device can be realized only through 4 flange bolts, and compared with the traditional method that paper adhesive tapes are adopted at two ends of the integral argon filling for plugging and water-soluble paper is pasted at two sides inside a welding opening by local argon filling, the time is greatly saved, and the construction period is shortened.

3. The O-shaped sealing ring is arranged between the pressing plate and the flange, the pressing plate and the flange are in elastic contact and non-rigid contact, the large end plate is pressed by one hand during assembly and disassembly, no acting force exists between the large end plate and the flange nut at the moment, the sliding force between the nut and the screw is small, and the nut can be easily operated by the other hand.

4. According to the traditional method, the two ends of the pipeline are plugged by using adhesive tapes in the integral argon filling process, the two sides of the welded junction are plugged by using water-melting paper in the local stamping process, the defects of non-reutilization property, cost increase, difficulty in pasting water-soluble paper, pipeline pollution caused by water-soluble paper and paste and the like exist, the equipment can completely avoid the defects, the cost is saved, the workload is reduced, and the running safety of the equipment is improved.

5. Because of the device advances, the exhaust is stable, and argon gas concentration maintains a specific value throughout, and effective isolated air guarantees that the welding seam internal surface is not by the oxidation, and the pressure value is moderate simultaneously, helps welding operation, has guaranteed welding seam internal surface shaping and welding seam overall quality, has promoted the security of equipment operation.

Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. The above and following descriptions are only specific embodiments of the present invention, and various examples are not intended to limit the spirit of the present invention.

Drawings

Fig. 1 is a schematic view of the structure of the present invention.

FIG. 2 is a schematic sectional view taken along A-A of FIG. 1.

Fig. 3 is a reference diagram of the usage state of the present invention.

Detailed Description

Referring to fig. 1-3, the part names are as follows: 1. a quick coupling; 2. a large end plate; 3. a sealing groove; 4. a metal tube; 5. an inflation hole; 6. a bolt; 7. a small end plate; 8. a nut; 9. a gasket; 10. a through hole; 11. a long flange tube; 12. a flange stub; 13. welding a welding opening; 14. a flange; 15. and (4) flange bolts.

Referring to fig. 1-3, an inflatable plugging device in stainless steel pipeline argon arc welding pipe comprises a quick coupling 1, a large end plate 2, a metal pipe 4, a bolt 6 and a small end plate 7 clamped with the bolt 6 through a nut 8, wherein the large end plate 2 and the small end plate 7 are both metal plates, gaskets 9 are padded at the contact positions of the two sides of the small end plate 7 and the bolt 6 and the nut 8 for improving the stability of the small end plate 7 and avoiding deformation, a through hole 10 is formed in the center of the large end plate 2, an inflation hole 5 is formed in the metal pipe 4, so that gas can reach the inflation hole through the quick coupling 1 and the through hole 10 to fill argon gas into a welding opening 13 for welding, a sealing groove 3 is formed in the large end plate 2, and an O-shaped sealing ring is arranged in the sealing groove 3.

During construction, the flange short pipe 12 and the flange long pipe 11 are aligned, gaps and staggered teeth are adjusted and then fixed in a spot welding mode, in order to prevent a large amount of argon gas from being discharged from the aligned positions, the welded joints are sealed through adhesive tapes, and the length of one-time continuous welding of a welder is reserved. And then, coating lubricating grease on the O-shaped sealing ring, and embedding the O-shaped sealing ring into the sealing groove 3 of the large end plate 2 to improve the sealing performance, wherein the lubricating grease is used for preventing the O-shaped sealing ring from falling off due to repeated assembly and disassembly of the inflatable plugging device in the stainless steel pipeline argon arc welding pipe. The stainless steel pipeline argon arc welding pipe internal inflation plugging device is inserted into a pipeline, the small end plate 7 is arranged in the flange

long pipe

11, 4 flange bolts 15 penetrate through the flanges 14 on the large end plate 2 and the flange short pipe 12 and are combined, and at the moment, the large end plate 2, the small end plate 7, the flange short pipe 12 and the flange long pipe 11 form a local space. Quick-operation joint 1 connects the argon filling hose, opens the gas cylinder, and argon gas passes through quick-operation joint 1, through-hole 10, tubular metal resonator 4 in proper order rapidly, and the local space in the gas charging hole 5 entering pipeline discharges the interior air of local space, then begins to weld crater 13, and wherein, little end plate 7 size is less than flange long tube 11 size, leaves the clearance between the two, as the exhaust hole to intraductal pressure is too big when preventing to receive the arc, causes to connect and receives the arc difficulty, produces defects such as pit. After welding, the gas cylinder is closed, the flange bolt 15 is loosened, and the gas-filled plugging device in the stainless steel pipeline argon arc welding pipe is pulled out, so that welding of each section of stainless steel pipe is completed.

The specific size is as follows: the outer diameter of the large end plate 2 is 110mm, the size of the through hole is 14 mm, the size of the flange bolt 15 on the large end plate 2 is R7 mm, the size of the small end plate 7 is 48 mm, the size of the long flange tube 11 is 50mm, and a gap of 1mm between the small end plate 7 and the long flange tube 11 is an exhaust hole.

During hydraulic hoist system pipeline installation, there are 168 flange pipe stub 12 and the total butt weld of flange long tube 11, fill with argon gas at the steel pipe after, under the same circumstances of gaseous spill-over loss volume, adopt whole argon filling, then every weld crater 13 welding needs all to fill with argon gas with 3m long steel pipe, needs 0.02356 x 168=3.95808m argon gas of bearing a full view altogether. After the device is adopted, argon is filled in the length of 0.2m between the two end plates, and argon is planted in the length of about 0.00157X 168=0.26376 m. If 1 bottle of argon gas calculates according to 40L, namely 0.04m to carry out the year, design and use this device and save argon gas quantity as follows around saving:

local argon unit price: 205 yuan/bottle;

argon cost before use: 3.95808m, 0.04m, 99 Yuan/bottle, 205 Yuan/bottle × 99 Yuan =20295 Yuan;

post-use argon cost: high yield 0.26376m, 0.04m, ca.7, 205 x 7 = 1435;

through the comparison of the front and the back, the cost is directly saved by 18860 yuan under the construction environment with the same argon supply, namely the same inflation overflow.

The foregoing description is only exemplary of the invention and is not intended to limit the spirit of the invention.

Claims

1. An air inflation plugging device in a stainless steel pipeline argon arc welding pipe is characterized by comprising a quick joint (1), a large end plate (2), a metal pipe (4), a bolt (6) and a small end plate (7) which is clamped with the bolt (6) through a nut (8) which are welded in sequence; the metal tube (4) is provided with an inflation hole (5); the center of the big end plate (2) is provided with a through hole (10).

2. The stainless steel pipeline argon arc welding pipe internal inflation plugging device according to claim 1, characterized in that a sealing groove (3) is formed on the large end plate, and an O-shaped sealing ring is arranged in the sealing groove (3).

3. The stainless steel pipeline argon arc welding pipe internal inflation plugging device according to claim 1 or 2, characterized in that a gasket is padded between the small end plate (7) and the bolts (6) and nuts (8) on two sides.