Hose air tightness inspection device

Abstract

The utility model discloses a hose air tightness inspection device which comprises a fixed water tank, a lifting frame is fixedly connected to one side of the fixed water tank, a lifting sliding seat is slidably connected to one side, close to the fixed water tank, of the lower portion of the lifting frame, and a pipeline placing frame is fixedly connected to one end, away from the lifting frame, of the lifting sliding seat. A lifting hydraulic cylinder is fixedly connected to the upper portion of the side, away from the fixed water tank, of the lifting frame, communicating pipes are arranged on the two sides of the lower portion of the lifting sliding base, and sealing joints are arranged at the ends, away from the lifting sliding base, of the two communicating pipes. According to the utility model, the upper half part of the detection cover is exposed out of the water surface, negative pressure is formed through the gravity of water in the detection cover, and when the pipe disc leaks, air in the pipe disc leaks into the detection cover and then gathers into the glass detection pipe, so that whether leakage occurs or not can be detected; and the leakage rate in unit time can be detected, and winding and unwinding are not needed any more.

Description

Technical Field

[0001] This utility model relates to the field of pipe testing technology, and in particular to a hose airtightness inspection device. Background Technology

[0002] Polytetrafluoroethylene (PTFE), known as the "King of Plastics," possesses excellent chemical stability and corrosion resistance, making it one of the world's best corrosion-resistant materials. Its temperature resistance is also outstanding, capable of long-term operation at temperatures ranging from 250℃ to -180℃, and can also be used for extended periods at temperatures above -70℃. PTFE hose assemblies, as a new type of material assembly, have been gradually promoted and developed internationally since 1970, initially used only as connecting pipelines for transmitting gaseous and liquid media. This hose assembly consists of a PTFE inner tube, various stainless steel wire reinforcement layers with different structures, and metal connectors at both ends. Compared to traditional rubber hoses, this type of PTFE hose assembly has advantages such as high pressure resistance, aging resistance, corrosion resistance, chemical resistance, and a wide operating temperature range, while maintaining ultra-low permeability under various temperature conditions.

[0003] The high-temperature resistant, low-permeability gas-liquid hose produced by the applicant's previously disclosed patent application number CN201910732939.X has excellent flexibility and flexural strength, is easy to bend but not easy to break, and has excellent permeability resistance and pressure resistance. In actual production, in order to ensure that the produced pipes will not have leakage points due to production problems, it is necessary to conduct air tightness testing on the pipes. The general air tightness testing method is to pressurize the pipes with high-pressure gas and then place them in a water tank to observe the bubbles. However, due to space limitations, it is not possible to test too long hoses, and the pipes are also relatively troublesome to retract and extend, leaving room for further improvement. Utility Model Content

[0004] The purpose of this invention is to solve at least one of the technical problems existing in the prior art, and to provide a hose airtightness inspection device that can directly inspect the coiled hose without the need for high-pressure gas pressurization, thus solving the above-mentioned problem.

[0005] To achieve the above objectives, a hose airtightness inspection device is provided, comprising a fixed water tank, a lifting frame fixedly connected to one side of the fixed water tank, a lifting slide slidably connected to the lower side of the lifting frame near the fixed water tank, a pipe placement frame fixedly connected to the end of the lifting slide away from the lifting frame, a lifting hydraulic cylinder fixedly connected above the side of the lifting frame away from the fixed water tank, connecting pipes provided on both sides of the lower part of the lifting slide, a sealing joint provided at the end of each connecting pipe away from the lifting slide, and air inlet pipes provided on both sides of the upper part of the lifting slide.

[0006] A detection cover is installed directly above the pipe placement rack. A cover connecting seat is fixedly sleeved on the upper outer side of the detection cover. A cover lifting seat is fixedly connected to the side of the cover connecting seat near the lifting frame. A lifting hydraulic cylinder is installed in the upper center of the cover lifting seat. A glass detection tube is fixedly connected to the upper center of the detection cover. A control valve is installed at the top of the glass detection tube.

[0007] According to the aforementioned hose airtightness inspection device, the lower output end of the lifting hydraulic cylinder is fixedly connected to the lifting slide.

[0008] According to the aforementioned hose airtightness inspection device, the ends of the two connecting pipes away from the sealing joint pass through the lifting slide and are respectively fixedly connected to the corresponding air inlet pipes.

[0009] According to the aforementioned hose airtightness inspection device, a pipe disc limiting seat is fixedly connected at the upper center of the pipe placement rack.

[0010] According to the aforementioned hose airtightness inspection device, the end of the cover lifting seat away from the cover connecting seat is slidably connected to the lifting frame.

[0011] According to the hose airtightness inspection device, the top cylinder of the lifting hydraulic cylinder is fixedly connected to the top of the lifting frame, and the bottom output end of the lifting hydraulic cylinder is fixedly connected to the cover lifting seat.

[0012] According to the aforementioned hose airtightness inspection device, the inner side of the glass detection tube is provided with scale lines, and the connecting tube is a corrugated hose.

[0013] The above solution has at least one of the following beneficial effects:

[0014] This invention features a liftable pipe placement rack, along with a detection hood and a glass detection tube. The wound pipe coil can be placed directly onto the rack, and both ends of the pipe can be connected to their respective connecting pipes. The rack and hood are then submerged in water. After the air is purged using a control valve, the valve is closed, and the rack and hood are raised, exposing the upper part of the hood above the water surface. The negative pressure created by the gravity of the water inside the hood causes air to leak into the hood and then into the glass detection tube when the pipe coil leaks. This not only detects the presence of a leak but also the amount of leakage per unit time, eliminating the need for rewinding and unwinding, thus enhancing the device's practicality.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0017] Figure 1 This is a three-dimensional structural diagram of the left side of a hose airtightness inspection device according to the present invention;

[0018] Figure 2 This is a three-dimensional structural diagram of the right side of a hose airtightness inspection device according to the present invention;

[0019] Figure 3 This is a front structural diagram of a hose airtightness inspection device according to the present invention;

[0020] Figure 4 This is a schematic diagram of the internal structure of a hose airtightness inspection device according to the present invention.

[0021] Legend:

[0022] 1. Fixed water tank; 2. Lifting frame; 3. Lifting slide; 4. Pipe placement rack; 5. Connecting pipe; 6. Inspection cover; 7. Glass inspection tube; 8. Control valve; 9. Lifting hydraulic cylinder; 10. Cover connecting seat; 11. Cover lifting seat; 12. Lifting hydraulic cylinder; 13. Pipe coil limit seat; 14. Sealing joint; 15. Air inlet pipe. Detailed Implementation

[0023] This section will describe in detail the specific embodiments of the present utility model. Preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present utility model. The drawings are all in a very simplified form and use non-precise proportions. They are only used to help to explain the embodiments of the present utility model in a convenient and clear way, and should not be construed as limiting the scope of protection of the present utility model.

[0024] Reference Figure 1-4This utility model provides a hose airtightness inspection device, including a fixed water tank 1, a lifting frame 2 fixedly connected to one side of the fixed water tank 1, a lifting slide 3 slidably connected to the lower side of the lifting frame 2 near the fixed water tank 1, a pipe placement frame 4 fixedly connected to the end of the lifting slide 3 away from the lifting frame 2, a pipe disc limiting seat 13 fixedly connected to the upper center of the pipe placement frame 4, and a lifting hydraulic cylinder 9 fixedly connected to the upper side of the lifting frame 2 away from the fixed water tank 1, with the lower output end of the lifting hydraulic cylinder 9 fixedly connected to the lifting slide 3. Both sides of the lower part of the lifting slide 3 are provided with connecting pipes 5. The ends of the two connecting pipes 5 away from the lifting slide 3 are provided with sealing joints 14. Both sides of the upper part of the lifting slide 3 are provided with air inlet pipes 15. The ends of the two connecting pipes 5 away from the sealing joints 14 pass through the lifting slide 3 and are fixedly connected to the corresponding air inlet pipes 15 respectively. When conducting the test, the coil of the pipe can be placed directly on the pipe placement rack 4. Then, the two ends of the pipe can be connected to the corresponding connecting pipes 5 through the sealing joints 14, so that the inside of the pipe is always connected to the outside.

[0025] A detection cover 6 is installed directly above the pipe placement rack 4. A cover connecting seat 10 is fixedly sleeved on the upper outer side of the detection cover 6. A cover lifting seat 11 is fixedly connected to the side of the cover connecting seat 10 near the lifting frame 2. The end of the cover lifting seat 11 away from the cover connecting seat 10 is slidably connected to the lifting frame 2. A lifting hydraulic cylinder 12 is installed in the upper middle part of the cover lifting seat 11. The top cylinder of the lifting hydraulic cylinder 12 is fixedly connected to the top of the lifting frame 2, and the bottom output end of the lifting hydraulic cylinder 12 is fixedly connected to the cover lifting seat 11. The upper part of the detection cover 6... A glass detection tube 7 is fixedly connected to the center of the square. The inner side of the glass detection tube 7 is provided with scale lines. A control valve 8 is provided at the top of the glass detection tube 7, so that the detection cover 6 is completely immersed in water, and then the upper part is exposed above the water surface. The negative pressure is formed by the gravity of the water inside the detection cover 6. When there is a leak in the tube coil, the air inside the tube coil will leak into the detection cover 6 and then accumulate in the glass detection tube 7. This not only detects whether a leak has occurred, but also detects the amount of leakage per unit time, and there is no need to rewind and unwind.

[0026] Working Principle: In operation, this invention utilizes a liftable pipe placement frame 4, along with a similarly liftable detection cover 6 and glass detection tube 7. The wound pipe coil is first placed directly onto the pipe placement frame 4. Then, both ends of the pipe are connected to the corresponding connecting pipes 5 via sealing joints 14. The pipe placement frame 4 and detection cover 6 are then submerged in water. After purging the air using control valve 8, the control valve 8 is closed, and the pipe placement frame 4 and detection cover 6 are raised, exposing the upper part of the detection cover 6 above the water surface. The negative pressure created by the gravity of the water inside the detection cover 6 causes air to leak from the pipe coil into the detection cover 6 and then accumulate in the glass detection tube 7. This not only detects whether a leak has occurred but also the amount of leakage per unit time, without requiring further winding and unwinding.

[0027] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A device for checking the tightness of a hose, comprising a fixed tank (1), characterized in that: The side of the fixed sink (1) is fixedly connected with a lifting frame (2), the lower side of the lifting frame (2) is slidably connected with a lifting slide (3) near the side of the fixed sink (1), the end of the lifting slide (3) away from the lifting frame (2) is fixedly connected with a pipeline placing rack (4), the upper side of the lifting frame (2) away from the fixed sink (1) is fixedly connected with a lifting hydraulic cylinder (9), the lower side of the lifting slide (3) is provided with a communication pipe (5) on both sides, the end of the communication pipe (5) away from the lifting slide (3) is provided with a sealing joint (14), the upper side of the lifting slide (3) is provided with an air inlet pipe (15) on both sides. The top of the pipeline placing rack (4) is provided with a detection cover (6), the outer side of the detection cover (6) is fixedly sleeved with a cover connecting seat (10), the side of the cover connecting seat (10) near the lifting frame (2) is fixedly connected with a cover lifting seat (11), the upper middle part of the cover lifting seat (11) is provided with a lifting hydraulic cylinder (12), the upper center of the detection cover (6) is fixedly connected with a glass detection tube (7), the top of the glass detection tube (7) is provided with a control valve (8).

2. A device for testing the air tightness of a hose according to claim 1, characterized in that The lower output end of the lifting hydraulic cylinder (9) is fixedly connected with the lifting slide (3).

3. A device for testing the air tightness of a hose according to claim 1, characterized in that The end of the communication pipe (5) away from the sealing joint (14) penetrates through the lifting slide (3) and is fixedly communicated with the corresponding air inlet pipe (15).

4. A device for testing the air tightness of a hose according to claim 1, characterized in that The upper center of the pipeline placing rack (4) is fixedly connected with a pipe disc limiting seat (13).

5. A device for testing the air tightness of a hose according to claim 1, characterized in that The end of the cover lifting seat (11) away from the cover connecting seat (10) is slidably connected with the lifting frame (2).

6. A device for testing the air tightness of a hose according to claim 1, characterized in that The top cylinder of the lifting hydraulic cylinder (12) is fixedly connected with the top of the lifting frame (2), and the bottom output end of the lifting hydraulic cylinder (12) is fixedly connected with the cover lifting seat (11).

7. A device for testing the air tightness of a hose according to claim 1, characterized in that The inner side of the glass detection tube (7) is provided with a scale line.

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