CN102794282B - Isobaric inflatable seal joint device for cleaning internal wall of tube - Google Patents

Abstract

The invention discloses an isobaric inflatable seal joint device for cleaning the internal wall of a tube. The isobaric inflatable seal joint device is characterized in that a seal ball is arranged in a cylinder barrel of an air cylinder; the tube is arranged in a first through hole formed in the seal ball in a penetrating manner; the seal ball is extruded by a piston when the cylinder barrel is inflated; after the seal ball is extruded, a radial force is generated, so that the seal ball can be tightly pressed on the outer periphery of the tube, a tight seal is formed between the seal ball and the tube, and the tube is positioned; and at the moment, high-pressure nitrogen is filled in, and can fully enters the central through hole of the tube to clean the internal wall of the tube. The isobaric inflatable seal joint device is simple in structure and good in sealability; when the internal wall of the tube is cleaned, the gas loss is low; furthermore, as the seal ball is adopted to fix the tube in the isobaric inflatable seal joint device, the fixing place is tightly fastened and uneasy to loose, so that the safety and the stability of the device are good; in addition, the fixing place does not damage a material on the outer surface of the tube; and the isobaric inflatable seal joint device is good in usability.

Description

Isobaric inflatable sealing joint device for pipe inner wall cleaning

technical field

The invention relates to an isobaric air-filled sealing joint device for cleaning the inner wall of a pipe.

Background technique

Some pipes need to be cleaned after a certain period of time. When cleaning, they can be flushed by filling high-pressure nitrogen into the inner cavity of the pipe. When flushing, the end of the pipe needs to be fixed to facilitate filling with high-pressure nitrogen. In the prior art, the end face of the pipe is generally sealed and fixed by using an American-style joint combined with a rubber pad and a spring. This method has problems such as the rubber pad being scrapped quickly and the sealing not meeting the requirements, and its safety performance cannot be guaranteed. , and will cause a great waste of gas, and the material on the surface where the end of the pipe is clamped is easy to fall.

Contents of the invention

The purpose of the present invention is to provide an isobaric inflatable sealing joint device for cleaning the inner wall of pipes. The isobaric inflatable sealing joint device has a simple structure, good sealing performance, small gas loss during the cleaning process of the inner wall of pipes, and good safety. and stability.

In order to achieve the above object, the technical solution adopted by the present invention is: an isobaric inflatable sealing joint device for cleaning the inner wall of a pipe, the pipe has a central through hole extending in the axial direction, the device includes a cylinder, and the cylinder includes a The cylinder in the inner cavity, the first end cover and the second end cover fixedly arranged at both ends of the cylinder respectively, the piston rod and the piston arranged in the inner cavity of the cylinder, the axis of the piston rod Extending along the axial direction of the cylinder, one end of the piston rod is fixedly arranged on the first end cover, at least part of the piston is sleeved on the piston rod in an axially slidable manner, A sealed first chamber and a second chamber are respectively formed between the piston, the first end cap, and the second end cap, and a sealing ball is arranged in the second chamber, and the second end cap A guide tube is fixedly connected to the outer side of the guide tube, the guide tube, the second end cover, the sealing ball, the piston, and the piston rod are provided with axially extending holes for the pipe to pass along. A first through hole penetrated in the axial direction, a second through hole extending in the axial direction is opened on the first end cover, the second through hole communicates with the first through hole, and the first end cover There is also at least one split hole on the cover, and the two ends of the split hole communicate with the first chamber and the second through hole respectively, and the device also includes a clip capable of clamping at one end of the guide tube. The safety clip tightly on the outer periphery of the pipe, and the inflation pipe fixedly arranged at one end of the first end cap, the lumen of the inflation pipe communicates with the second through hole.

Preferably, the piston rod is integrated with the first end cover.

Preferably, the inflation pipeline is fixedly arranged at one end of the first end cap through a rotary joint, and a shut-off valve is arranged on the pipeline of the inflation pipeline.

Preferably, the diameter of the second through hole is smaller than that of the first through hole, and the centerline of the first through hole and the centerline of the second through hole are distributed along the same straight line.

Due to the application of the above-mentioned technical solution, the present invention has the following advantages compared with the prior art: the isobaric inflatable sealing joint device for pipe inner wall cleaning of the present invention, wherein a sealing ball is arranged in the cylinder barrel of the cylinder, and the pipe is passed through the sealing ball In the first through hole opened above, the piston can squeeze the sealing ball by inflating the cylinder. After the sealing ball is squeezed, a radial force is generated so that it can be pressed tightly on the outer circumference of the pipe, which makes A tight seal is formed between the sealing ball and the pipe, and the pipe is positioned. At this time, high-pressure nitrogen is filled, and the high-pressure nitrogen can completely enter the central through hole of the pipe to flush the inner wall of the pipe. The device has a simple structure and good sealing performance, and the gas loss is small during the cleaning process of the inner wall of the pipe. Moreover, the sealing ball is used to fix the pipe in the device, and the fastening at the fixed place is not easy to loosen, which has good safety and stability. At the same time, the fixing point will not cause damage to the material on the outer surface of the pipe, and has good performance.

Description of drawings

Accompanying drawing 1 is the sectional structure schematic diagram of the present invention.

Among them: 1. Pipe material; 11. Center through hole; 2. Cylinder; 21. Cylinder barrel; 22. First end cover; 23. Second end cover; 24. Piston rod; 25. Piston; 26. Sealing ball; 27 , the second through hole; 28, the shunt hole; 29, the first chamber; 3, the guide pipe; 4, the insurance card; 5, the first through hole;

Detailed ways

The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Referring to the isobaric inflatable sealing joint device for pipe inner wall cleaning shown in Fig. 1, the pipe 1 has a central through hole 11 extending in the axial direction, and cleaning means filling the central through hole 11 with high-pressure nitrogen gas to clean the inner wall. The isobaric pneumatic sealing joint device includes a cylinder 2, the cylinder 2 includes a cylinder 21 with an inner cavity, a first end cover 22 and a second end cover 23 fixedly arranged at both ends of the cylinder 21 respectively, The piston rod 24 in the inner chamber and the piston 25 arranged on the piston rod 24, one end of the piston rod 24 is fixed on the first end cover 22, here, the piston rod 24 and the first end cover 22 are integrally arranged, the piston 25 is at least partly sleeved on the piston rod 24 and the piston 25 can slide along the axial direction of the piston rod 24, the part of the piston 25 sleeved on the piston rod 24, its inner peripheral side wall and the piston rod 24 The outer circumferential side walls are arranged in close contact with each other, and sealing rings can be used between them to achieve tight sealing. At least part of the outer circumferential sidewall on the piston 25 is closely attached to the inner circumferential sidewall of the cylinder 21, so that the inner chamber of the cylinder 21 is divided into two closed first chambers 29 and 2 by the piston 25. The second chamber, wherein, between the piston 25 and the first end cap 22 is the first chamber 29, between the piston 25 and the second end cap 23 is the second chamber, and the second chamber is provided with a seal Ball 26. The outer side of the second end cover 23 is fixedly connected with a guide tube 3, and the guide tube 3, the second end cover 23, the sealing ball 26, the piston 25, and the piston rod 24 are provided with axially extending holes for the pipe material 1 to move along. The diameter of the first through hole 5 inserted axially should be slightly larger than the pipe diameter of the pipe material 1 . A second through hole 27 extending in the axial direction is opened on the first end cover 22, and the second through hole 27 communicates with the first through hole 5. At least one split hole 28 is also opened on the first end cover 22. Both ends of the hole 28 communicate with the first chamber 29 and the second through hole 27 respectively. The isobaric inflatable sealing joint device also includes a safety card 4 which is arranged at one end of the guide pipe 3 and can be clamped on the outer peripheral portion of the pipe material 1, an inflation pipe 6 which is fixedly arranged at one end of the first end cover 22, and the tube of the inflation pipe 6 The cavity communicates with the second through hole 27 . Here, the inflation pipeline 6 is fixedly arranged at one end of the first end cap 22 through the rotary joint 7 , and a cut-off valve 8 is arranged on the pipeline of the inflation pipeline 6 to control the air intake state of the inflation pipeline 6 .

In this embodiment, the diameter of the second through hole 27 is smaller than the diameter of the first through hole 5, so that a limiting surface is formed at the joint between the first end cover 22 and the piston rod 24, and the pipe 1 is inserted into the When the first through hole 5 is in the position, the end surface of the pipe 1 can be limited. In addition, the center line of the first through hole 5 and the center line of the second through hole 27 are distributed along the same straight line, so that when the pipe material 1 is inserted into the first through hole 5, the central through hole 11 of the pipe material 1 can be aligned along the axial direction. Opposite to the second through hole 27 , it is convenient to fill the central through hole 11 with high-pressure nitrogen gas to clean the inner wall of the pipe 1 .

The working process of the present embodiment is set forth below in detail:

Referring to Fig. 1, the pipe material 1 is inserted into the first through hole 5 in the axial direction, and when it penetrates into the first through hole 5 on the piston rod 24 and reaches a certain position, lock the safety card 4 first, so that Insurance card 4 is pressed on the outer peripheral part of pipe material 1, and pipe material 1 has been initially fixed like this, and pipe material 1 is washed out by air flow when starting to charge high-pressure nitrogen gas in the central through hole 11 of pipe material 1 like this. Then, open a small part of stop valve 8 so that the charging pipeline 6 is filled with high-pressure nitrogen, high-pressure nitrogen flows into the first through-hole 5 and the split hole 24 through the second through hole 27, and the high-pressure nitrogen through the split hole 24 enters the first chamber 29, the pressure in the first chamber 29 is constantly increasing, which makes the piston 25 slide axially on the piston rod 24 to one end of the second chamber and squeeze the sealing ball 26, and the sealing ball 26 is in the Under extrusion, deformation occurs in the axial direction and a radial force is generated, and the radial force makes the inner circumferential side wall of the first through hole 5 on the sealing ball 26 tightly pressed against the outer side of the pipe 1 On the periphery, the positioning of the pipe material 1 is thus formed, and at the same time a tight seal is formed between the sealing ball 26 and the surface of the pipe material 1 so as to block the communication of the first through hole 5 located on both sides of the sealing ball 26, thereby It is avoided that the charged high-pressure nitrogen gas flows to the outside of the device through the first through hole 5 to cause waste of gas. After the sealing ball 26 has formed a fixation to the pipe material 1, the shut-off valve 8 is fully opened, so that the high-pressure nitrogen gas is quickly charged into the device. At this time, the charged high-pressure nitrogen gas can completely enter the pipe material 1 through the second through hole 27. In the central through hole 11, the inner wall of the pipe material 1 can be well cleaned.

In summary, the isobaric inflatable sealing joint device for cleaning the inner wall of pipes according to the present invention, wherein the sealing ball 26 is arranged in the cylinder barrel 21 of the cylinder 2, and the first through hole 5 opened on the sealing ball 26 is passed through the pipe 1 In the process, the piston 25 presses the sealing ball 26 by inflating the cylinder 21, and the sealing ball 26 generates a radial force after being squeezed so that it can be pressed tightly on the outer circumference of the pipe 1, which makes the sealing A tight seal has been formed between the ball 26 and the pipe material 1 and the pipe material 1 has been positioned. At this time, high-pressure nitrogen gas is recharged, and the high-pressure nitrogen gas can completely enter the central through hole 11 of the pipe material 1 to flush the inner wall of the pipe material 1 . The device has a simple structure and good sealing performance, and the gas loss is small during the cleaning process of the inner wall of the pipe material 1. Moreover, the sealing ball 26 is used to fix the pipe material 1 in the device, and the fastening place is not easy to loosen, which has good safety. and stability, at the same time, the fixing point will not cause damage to the material on the outer surface of the pipe 1, and has good performance.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and not to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention shall fall within the protection scope of the present invention.

Claims (4)

1. a pipe material inner wall cleans with isobaric gas-flow closure piecing devices, described tubing has the central through hole extending vertically, it is characterized in that: described device comprises cylinder, described cylinder comprises the cylinder barrel with inner chamber, be arranged on regularly respectively the first end cap and second end cap at described cylinder barrel two ends, be arranged on the piston rod in described inner cavity of cylinder, piston, the axial line of described piston rod extends axially along described cylinder barrel, one end of described piston rod is fixedly installed on described first end and covers, on described piston, have at least part to be set in slippingly vertically on described piston rod, described piston and described the first end cap, between the second end cap, form respectively the first mutually airtight chamber, the second chamber, in described the second chamber, be provided with ball sealer, the outside of described the second end cap is permanently connected and is provided with guide pipe, described guide pipe, described the second end cap, described ball sealer, described piston, on described piston rod, all offer first through hole that can penetrate vertically for described tubing extending vertically, described first end covers and offers the second through hole extending vertically, described the second through hole is connected with described the first through hole, described first end covers and also offers at least one tap hole, the two ends of described tap hole respectively with described the first chamber, described the second through hole is connected, described device also comprise be arranged on described guide pipe one end can be clamped in the insurance card in perimembranous outside described tubing, be fixedly installed on the gas ducting of described first end cap one end, the tube chamber of described gas ducting is connected with described the second through hole.

2. pipe material inner wall according to claim 1 cleans with isobaric gas-flow closure piecing devices, it is characterized in that: described piston rod and described the first end cap are wholely set.

3. pipe material inner wall according to claim 1 cleans with isobaric gas-flow closure piecing devices, it is characterized in that: described gas ducting is fixedly installed on one end of described the first end cap by rotary joint, on the pipeline of described gas ducting, be provided with stop valve.

4. pipe material inner wall according to claim 1 cleans with isobaric gas-flow closure piecing devices, it is characterized in that: the aperture of described the second through hole is less than the aperture of described the first through hole, the center line of the center line of described the first through hole and described the second through hole is along same lineal layout.

Images