Air tightness detection device for pressure pipeline

Abstract

The utility model discloses a pressure pipeline airtightness detection device, and relates to the technical field of airtightness detection devices. The device comprises a clamping mechanism, the clamping mechanism comprises an upper clamp and a lower clamp which are hinged to each other, when the upper clamp is attached to the lower clamp, the upper clamp and the lower clamp hoop a pressure pipeline, and a closed air cavity is formed between the upper clamp and the pressure pipeline and between the lower clamp and the pressure pipeline. The upper clamp and the lower clamp can be fixed to each other through the fixing mechanism, the upper clamp and the lower clamp can be matched with the sealing gasket when attached to each other so as to form a sealed air cavity wrapping the pipeline connecting position, when a worker carries out air tightness detection, the air cavity can be inflated and pressurized through the inflation piece, then the movement of the piston column in the communicating pipe is observed, and the detection accuracy is improved. According to the invention, the air tightness of the pressure pipeline can be confirmed by detecting the air tightness of the connecting part of the pressure pipeline, and by adopting the detection mode, the connecting part of the pressure pipeline with poor air tightness can be quickly checked, so that replacement and maintenance are facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of airtightness detection devices, and in particular to an airtightness detection device for a pressure pipeline. Background Art

[0002] Pressure pipelines refer to special equipment used in production and life that may cause high risks such as combustion, explosion or poisoning, such as pipelines for steam, toxic, flammable and explosive media.

[0003] Most pressure pipes are composed of multiple pipe components, and the pressure pipes are connected to each other by flanges or welding. After installation, the pressure pipe joints need to be tested for airtightness to ensure that the pressure pipes do not leak due to poor pipe sealing during use. Traditional pressure pipe airtightness testing devices mostly seal the two ends of the installed pressure pipe, inflate the interior of the pipe, and then observe the pressure gauge on the testing device to determine whether the airtightness of the pressure pipe joints is good. When this testing method is used to test a pipe formed by connecting multiple pressure pipes, it is impossible to directly identify the leaking joints, resulting in time-consuming subsequent maintenance and replacement. In order to reasonably improve this problem, the present application proposes a pressure pipe airtightness testing device. Utility Model Content

[0004] The purpose of this application is to provide a pressure pipe air tightness detection device in order to effectively and reasonably improve the problems presented in the above-mentioned background technology.

[0005] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions:

[0006] Pressure pipeline air tightness detection device, including:

[0007] A clamping mechanism, wherein the clamping mechanism comprises an upper clamp and a lower clamp which are hinged to each other. When the upper clamp and the lower clamp are in contact with each other, the upper clamp and the lower clamp form a hoop for the pressure pipe, and a closed air cavity is formed between the upper clamp and the pressure pipe;

[0008] The fixing mechanism and the connecting pipe installed on the upper fixture, wherein:

[0009] The fixing mechanism is used to fix the lower clamp, the connecting pipe is connected to the air cavity, and a piston column is slidably fitted in the connecting pipe, a compression spring is connected between the connecting pipe and the piston column, an air hole is opened at the end of the connecting pipe, and the connecting pipe has an optically transparent property;

[0010] Sealing gaskets are provided along the edges of the upper clamp and the lower clamp, and are used to contact the wall of the pressure pipe;

[0011] An inflatable member is mounted on the lower fixture, and is used to inflate the air cavity.

[0012] Furthermore, the connecting pipe is threadedly connected to the upper clamp.

[0013] Furthermore, a sealing ring is connected to the end of the connecting pipe, and when the connecting pipe is connected to the upper clamp, the sealing ring conflicts with the upper clamp.

[0014] Furthermore, a pull rod is slidably passed through the end of the connecting pipe, and the end of the pull rod is connected to the piston column.

[0015] Furthermore, scale lines are constructed on the outer surface of the connecting tube, and there are a plurality of scale lines in a linear array along the length direction of the connecting tube.

[0016] Furthermore, an installation groove is constructed on the inner side of the upper clamp, a tension spring is installed in the installation groove, a sliding rod is provided on the inner side of the tension spring, the sliding rod slides through the installation groove, an air outlet groove is opened on the peripheral side of the sliding rod, and a blocking block connected to the tension spring is constructed at the end of the sliding rod, and a sealing rubber ring is installed on the blocking block.

[0017] Furthermore, a pressing block is configured at the end of the sliding rod, and the cross-sectional area of ​​the pressing block is larger than that of the sliding rod.

[0018] Furthermore, arc-shaped plates are constructed at the inner edges of the upper clamp and the lower clamp, and the sealing gasket is laid on the inner side of the arc of the arc-shaped plate.

[0019] The beneficial effects of this application are as follows:

[0020] 1. The present application can fix the upper clamp and the lower clamp to each other through a fixing mechanism, so that when the two are in contact with each other, they can cooperate with the sealing gasket to form a sealed air cavity that wraps the pipe connection. When the staff conducts an airtightness test, the air cavity can be inflated and pressurized through the inflatable piece, and then the sealing of the pressure pipe can be confirmed by observing the movement of the piston column in the connecting pipe, so as to achieve the purpose of airtightness test of the pressure pipe connection. By adopting this detection method, the pressure pipe connection with poor sealing can be quickly identified for easy replacement and maintenance.

[0021] 2. The present application adopts a design of threaded connection between the connecting pipe and the upper clamp, so that the connecting pipe and the upper clamp have the advantages of easy installation and simple disassembly. After use, the connecting pipe can be stored to prevent it from being damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural diagram of this application;

[0023] Figure 2 This is a half-section schematic diagram of the connecting pipe structure of the present application;

[0024] Figure 3 This application Figure 2 Enlarged view of point A in the middle;

[0025] Figure 4 It is a half-section schematic diagram of the installation slot structure of the present application;

[0026] Figure 5 This application Figure 4 Enlarged view of point B in the middle.

[0027] Figure numerals: 1. Clamping mechanism; 2. Upper clamp; 3. Lower clamp; 4. Air cavity; 5. Fixing mechanism; 6. Connecting pipe; 7. Piston column; 8. Compression spring; 9. Air vent; 10. Sealing pad; 11. Inflatable part; 12. Sealing ring; 13. Pull rod; 14. Scale pattern; 15. Mounting groove; 16. Tension spring; 17. Sliding rod; 18. Air outlet groove; 19. Block; 20. Sealing rubber ring; 21. Pressing block; 22. Arc plate; 23. Accommodating cavity; 24. Rubber hose. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0029] like Figure 1-Figure 4 As shown, a pressure pipeline air tightness detection device proposed in one embodiment of the present application includes:

[0030] The clamping mechanism 1 comprises an upper clamp 2 and a lower clamp 3 which are hinged to each other. The upper clamp 2 and the lower clamp 3 are in a semicircular ring shape. When the upper clamp 2 and the lower clamp 3 are fitted together, the two can rotate along the hinge point to form a complete ring. The upper clamp 2 and the lower clamp 3 form a hoop for the pressure pipe, so that the pressure pipe can be clamped and fixed, and a closed air cavity 4 is formed between the two and the pressure pipe. The air cavity 4 is annular. The inner side of the ring of the upper clamp 2 and the lower clamp 3 is constructed with a receiving cavity 23 for receiving the connection of the pressure pipe. When the upper clamp 2 and the lower clamp 3 are fitted together, the two receiving cavities 23 form a closed annular air cavity 4 with the pressure pipe.

[0031] The fixing mechanism 5 and the connecting pipe 6 mounted on the upper fixture 2 are as follows. Figure 4 As shown, the fixing mechanism 5 can be a lock, wherein:

[0032] The fixing mechanism 5 is used to fix the lower clamp 3. When the upper clamp 2 and the lower clamp 3 are fitted together, the upper clamp 2 and the lower clamp 3 can be fixed together through the fixing mechanism 5. The connecting tube 6 is connected to the air cavity 4, and a piston column 7 is slidably fitted in the connecting tube 6. A compression spring 8 is connected between the connecting tube 6 and the piston column 7. The piston column 7 is used to prevent the gas in the air cavity 4 from flowing out of the connecting tube 6. The compression spring 8 is used to provide a thrust for forcing the connecting tube 6 to reset. An air vent 9 is provided at the end of the connecting tube 6. When the piston column 7 moves in the connecting tube 6, the gas in the connecting tube 6 can be discharged from the air vent 9. The connecting tube 6 has optical transparency. The connecting pipe 6 is made of Pam transparent material. When the connection of the pressure pipe is intact and the air pressure in the air cavity 4 is greater than that outside, the piston column 7 is squeezed by the pressure to move toward the end of the connecting pipe 6, thereby squeezing the compression spring 8 to cause elastic deformation. At this time, the piston column 7 cannot be reset under the action of pressure. When there is a hole in the connection of the pressure pipe, the piston column 7 can push gas into the hole with the cooperation of the compression spring 8, so that the piston column 7 can be quickly reset. The inspection personnel can directly observe the movement of the piston column 7 through the connecting pipe 6, and thereby achieve the detection of the sealing of the pressure pipe connection;

[0033] Sealing gasket 10, sealing gasket 10 is provided at the edge of upper clamp 2 and lower clamp 3, and the setting of sealing gasket 10 can play a sealing role when upper clamp 2 and lower clamp 3 are attached, and it is used to contact with the wall of pressure pipe, and sealing gasket 10 can also realize close contact between clamp and pressure pipe, and prevent air leakage of air cavity 4;

[0034] The inflatable member 11 mounted on the lower fixture 3 is as follows Figure 1 As shown, the inflatable member 11 may be an air pump, which is detachably mounted on the lower clamp 3 through a rubber hose 24. The inflatable member 11 is connected to the inner side of the lower clamp 3. The inflatable member 11 is used to inflate the air cavity 4. After the two upper clamps 2 and the lower clamp 3 are fitted and clamped, the air cavity 4 can be pressurized through the inflatable member 11 to test the connection of the pressure pipe;

[0035] The present application can fix the upper clamp 2 and the lower clamp 3 to each other through the fixing mechanism 5, so that when the two are in contact with each other, they can cooperate with the sealing gasket 10 to form a sealed air cavity 4 that wraps the pipe connection. When the staff performs an airtightness test, the air cavity 4 can be inflated and pressurized by the inflatable member 11, and then the sealing of the pressure pipe can be confirmed by observing the movement of the piston column 7 in the connecting pipe 6, so as to achieve the purpose of performing an airtightness test on the connection of the pressure pipe. By adopting this detection method, the pressure pipe connection with poor sealing can be quickly found for easy replacement and maintenance.

[0036] like Figure 2-Figure 4As shown, in some embodiments, the connecting pipe 6 is threadedly connected to the upper clamp 2. The threaded connection has the advantages of easy installation and simple disassembly. After use, the connecting pipe 6 can be stored to prevent it from being damaged.

[0037] like Figure 2-Figure 4 As shown, in some embodiments, a sealing ring 12 is connected to the end of the connecting pipe 6, and the sealing ring 12 is bonded and fixed to the connecting pipe 6 by rubber glue. When the connecting pipe 6 is connected to the upper clamp 2, the sealing ring 12 is in conflict with the upper clamp 2, thereby improving the installation sealing of the connecting pipe 6 and the upper clamp 2, so that when the pressure pipeline is tested for air tightness, gas will not flow out from the connection.

[0038] like Figure 1-Figure 4 As shown, in some embodiments, a pull rod 13 is slidably passed through the end of the connecting tube 6, and the end of the pull rod 13 is connected to the piston column 7. When the air cavity 4 is inflated and pressurized through the inflatable member 11, the piston column 7 can be pulled out in advance through the pull rod 13, thereby reducing the resistance encountered when adding air to the air cavity 4.

[0039] like Figure 1-Figure 3 As shown, in some embodiments, scale lines 14 are constructed on the outer surface of the connecting tube 6, and there are multiple scale lines 14 in a linear array along the length direction of the connecting tube 6. With such a design, the movement of the piston column 7 can be observed more intuitively by comparing the scale lines 14.

[0040] like Figure 4 and Figure 5As shown, in some embodiments, a mounting groove 15 is constructed on the inner side of the upper clamp 2, and the notch of the mounting groove 15 is a plane. A tension spring 16 is installed in the mounting groove 15, and a sliding rod 17 is arranged on the inner side of the tension spring 16. The sliding rod 17 slides through the mounting groove 15, and an air outlet groove 18 is opened on the peripheral side of the sliding rod 17. The air outlet groove 18 extends along the length direction of the sliding rod 17. A block 19 connected to the tension spring 16 is constructed at the end of the sliding rod 17. The block 19 is larger than the notch of the mounting groove 15. The tension spring 16 is used to provide a pulling force for the block 19 to fit the notch of the mounting groove 15. A sealing rubber ring 20 is installed on the block 19, and the sealing rubber ring 20 is arranged close to the block 19 and the mounting groove 15. On one side, when the blocking block 19 fits the notch of the mounting groove 15, the notch of the mounting groove 15 is located on the inner side of the ring of the sealing rubber ring 20, and the sealing rubber ring 20 is in close contact with the notch of the mounting groove 15, so that the air cavity 4 has good sealing performance. When the air cavity 4 is pressurized, the blocking block 19 cannot be separated from the notch of the mounting groove 15 due to the cooperation of the tension spring 16 and the air pressure, so that the high-pressure gas is not easy to flow out of the air cavity 4. After the test, the sliding rod 17 can be pushed toward the inner side of the upper clamp 2 to separate the blocking block 19 from the notch of the mounting groove 15, and the high-pressure gas in the air cavity 4 can be slowly released through the air outlet groove 18, thereby avoiding the phenomenon that the fixing mechanism 5 cannot be opened due to the excessive pressure inside the air cavity 4.

[0041] like Figure 5 As shown, in some embodiments, a pressing block 21 is constructed at the end of the sliding rod 17, and the cross-sectional area of ​​the pressing block 21 is larger than that of the sliding rod 17. By setting the pressing block 21, the force-bearing area of ​​the sliding rod 17 can be increased, so that the sliding rod 17 is forced to move toward the inner side of the lower clamp 3 by pushing the pressing block 21.

[0042] like Figure 2 As shown, in some embodiments, the inner edges of the upper clamp 2 and the lower clamp 3 are both constructed with an arc plate 22, and the sealing gasket 10 is laid on the inner side of the arc of the arc plate 22. The provision of the arc plate 22 can increase the contact area between the upper clamp 2 and the lower clamp 3 and the pressure pipe, so that the air tightness between the upper clamp 2 and the lower clamp 3 and the pressure pipe is good.

[0043] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Pressure pipeline air tightness detection device, characterized in that: include: A clamping mechanism (1), the clamping mechanism (1) comprising an upper clamp (2) and a lower clamp (3) which are hinged to each other, when the upper clamp (2) and the lower clamp (3) are in contact with each other, the upper clamp (2) and the lower clamp (3) form a hoop for the pressure pipe, and a closed air cavity (4) is formed between the upper clamp (2) and the lower clamp (3) and the pressure pipe; A fixing mechanism (5) and a connecting pipe (6) mounted on the upper fixture (2), wherein: The fixing mechanism (5) is used to fix the lower clamp (3), the connecting pipe (6) is connected to the air cavity (4), and a piston column (7) is slidably fitted in the connecting pipe (6), a compression spring (8) is connected between the connecting pipe (6) and the piston column (7), and an air hole (9) is opened at the end of the connecting pipe (6); A sealing gasket (10), the sealing gasket (10) is provided along the edges of the upper clamp (2) and the lower clamp (3), and is used to contact the wall of the pressure pipe; A pull rod (13) is slidably passed through the end of the connecting pipe (6), and the end of the pull rod (13) is connected to the piston column (7); An inflatable member (11) is mounted on the lower clamp (3), and the inflatable member (11) is used to inflate the air cavity (4).

2. The pressure pipeline airtightness detection device according to claim 1, characterized in that: The connecting pipe (6) is threadedly connected to the upper clamp (2).

3. The pressure pipeline airtightness detection device according to claim 2 is characterized in that: The end of the connecting pipe (6) is connected to a sealing ring (12). When the connecting pipe (6) is connected to the upper clamp (2), the sealing ring (12) contacts the upper clamp (2).

4. The pressure pipeline airtightness detection device according to claim 1, characterized in that: The outer surface of the connecting tube (6) is provided with scale lines (14), and a plurality of scale lines (14) are arranged in a linear array along the length direction of the connecting tube (6).

5. The pressure pipeline airtightness detection device according to claim 1, characterized in that: The inner side of the upper clamp (2) is provided with a mounting groove (15), a tension spring (16) is installed in the mounting groove (15), a sliding rod (17) is arranged on the inner side of the tension spring (16), the sliding rod (17) slides through the mounting groove (15), an air outlet groove (18) is arranged on the peripheral side of the sliding rod (17), a blocking block (19) connected to the tension spring (16) is constructed at the end of the sliding rod (17), and a sealing rubber ring (20) is installed on the blocking block (19).

6. The pressure pipeline airtightness detection device according to claim 5, characterized in that: A pressing block (21) is configured at the end of the sliding rod (17), and the cross-sectional area of ​​the pressing block (21) is larger than that of the sliding rod (17).

7. The pressure pipeline airtightness detection device according to claim 1, characterized in that: The upper clamp (2) and the lower clamp (3) are both provided with arc-shaped plates (22) at their inner edges, and the sealing gasket (10) is laid on the inner side of the arc of the arc-shaped plate (22).

Images