Metal hose on-line inspection auxiliary system

Abstract

The utility model discloses an on-line inspection auxiliary system for a metal hose, and belongs to the technical field of pipeline maintenance. The metal hose on-line inspection auxiliary system comprises hard pipelines and emptying valves, the two hard pipelines are connected to the two ends of a metal hose through flanges respectively, the emptying valves are connected to the ends of the two hard pipelines through flanges, and the emptying valves and the hard pipelines are used for forming an inspection cavity for sealing the metal hose. The hard pipeline is communicated with an inspection liquid path and an inspection gas path, the inspection liquid path is matched with a gas port of the inspection gas path, and the inspection liquid path is matched with a pressure gauge. According to the utility model, the inspection liquid path is matched with the inspection gas path, so that the negative influence of maintenance is reduced while the two requirements of online inspection and comprehensive inspection of the metal hose are met, the inspection cavity can be easily emptied, medium leakage is avoided when the metal hose is disassembled and the appearance of the metal hose is inspected, and the service life of the metal hose is prolonged. The low loss of the medium is ensured, and the safety and environmental pollution risks caused by medium leakage are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline inspection and repair, in particular to an online inspection auxiliary system for a metal hose. Background Art

[0002] Corrugated metal hose is referred to as metal hose, which is a combination of corrugated mesh, mesh sleeve and joint or a combination of corrugated pipe and joint. It is a kind of soft pipe mostly used for pipeline displacement compensation, installation deviation, vibration absorption and noise reduction.

[0003] At present, the regular inspection of metal hoses is divided into online inspection and comprehensive inspection. Whether online inspection or comprehensive inspection, visual inspection is required to inspect the inner and outer surfaces of the metal hose at the same time. Therefore, the inspection of the metal hose must be emptied of the medium in the tube. The comprehensive inspection after the online inspection adds pressure resistance test and air tightness test.

[0004] The current inspection process for metal hoses requires manual disconnection of the metal hose and the main pipe body before operation, which will cause the medium in the metal hose to leak, posing risks to operational safety and environmental pollution. In addition, industrial pipelines are large in size, and the disassembly and installation of metal hoses is labor-intensive and inconvenient to operate.

[0005] In summary, the online inspection of metal hoses urgently needs to introduce auxiliary systems to solve the above problems. Utility Model Content

[0006] Purpose of the utility model: to provide an online inspection auxiliary system for a metal hose to solve the above-mentioned problems existing in the prior art.

[0007] Technical solution: A metal hose online inspection auxiliary system includes a hard pipe and a drain valve. The two hard pipes are flange-connected to the two ends of the metal hose respectively. The ends of the two hard pipes are flange-connected with drain valves. The drain valve and the hard pipe are used to form an inspection cavity that seals the metal hose. The hard pipe is connected to an inspection liquid circuit and an inspection gas circuit. The inspection liquid circuit cooperates with the air port of the inspection gas circuit to empty the medium in the inspection cavity. The inspection liquid circuit cooperates with a pressure gauge to inspect the pressure of the inspection cavity.

[0008] Furthermore, the inspection liquid circuit includes a branch pipe, a branch valve and a liquid pump, one end of the branch pipe is connected to the hard pipe, and the other end is connected to the liquid pump, and the branch valve is installed on the branch pipe.

[0009] Furthermore, the inspection gas circuit includes a three-way valve, one port of the three-way valve is connected to the hard pipe, and the gas port and the pressure gauge are respectively installed on the other two ports of the three-way valve.

[0010] Furthermore, the pressure gauge is connected to the three-way valve through a metal bellows.

[0011] Furthermore, the line inspection auxiliary system also includes a disassembly traction device, which includes a traction motor, a winch and a tying hoop. One end of the winch is connected to the traction motor, and the other end is connected to the tying hoop. The traction motor is installed on a hard pipe, and the tying hoop is installed on a metal hose.

[0012] Beneficial effects: The utility model utilizes the cooperation of the inspection liquid circuit and the inspection gas circuit to meet the two major requirements of online inspection and comprehensive inspection of metal hoses, while greatly reducing the negative impact of maintenance. Specifically, the utility model can easily empty the inspection cavity, and when the metal hose is disassembled and inspected for appearance, it avoids leakage of the medium, which ensures low loss of the medium and reduces the safety and environmental pollution risks caused by leakage of the medium. The operational difficulty of online inspection is greatly reduced, and work efficiency is improved; at the same time, for comprehensive inspection, the appearance of the metal hose can be confirmed by visually inspecting the emptying pipe, and the pressure resistance test and airtightness test can be controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a structural schematic diagram of the inspection branch in the utility model;

[0015] Figure 3 It is a structural schematic diagram of the inspection gas circuit in the utility model.

[0016] The accompanying drawings are marked as follows: 1. Metal hose; 2. Hard pipe; 3. Drain valve; 4. Test liquid circuit; 41. Branch pipe; 42. Branch valve; 43. Liquid pump; 5. Test gas circuit; 51. Three-way valve; 52. Pressure gauge; 53. Gas port. DETAILED DESCRIPTION

[0017] In the following description, a large number of specific details are given to provide a more thorough understanding of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the utility model, some technical features known in the art are not described.

[0018] like Figure 1-Figure 3As shown, a metal hose online inspection auxiliary system includes a hard pipe 2 and a drain valve 3. The two hard pipes 2 are flange-connected to the two ends of the metal hose 1 respectively. The ends of the two hard pipes 2 are flange-connected with the drain valve 3. The drain valve 3 and the hard pipe 2 are used to form an inspection cavity that seals the metal hose 1. The hard pipe 2 is connected with an inspection liquid circuit 4 and an inspection gas circuit 5. The inspection liquid circuit 4 cooperates with the air port 53 of the inspection gas circuit 5 to empty the medium in the inspection cavity. The inspection liquid circuit 4 cooperates with the pressure gauge 52 to inspect the pressure of the inspection cavity.

[0019] The utility model utilizes the cooperation of the inspection liquid circuit 4 and the inspection gas circuit 5 to meet the two major requirements of online inspection and comprehensive inspection of the metal hose 1, while greatly reducing the negative impact of maintenance. Specifically, the utility model can easily empty the inspection cavity, and when the metal hose 1 is disassembled and the appearance inspection is performed, the medium leakage is avoided, which ensures the low loss of the medium and reduces the safety and environmental pollution risks caused by the leakage of the medium. The operational difficulty of online inspection is greatly reduced and the work efficiency is improved; at the same time, for comprehensive inspection, the appearance of the metal hose can be confirmed by visually emptying the pipe, and the pressure resistance test and airtightness test can be controlled.

[0020] like Figure 1 and Figure 2 As shown, the test liquid circuit 4 includes a branch pipe 41, a branch valve 42 and a liquid pump 43. One end of the branch pipe 41 is connected to the hard pipe 2, and the other end is connected to the liquid pump 43. The branch valve 42 is installed on the branch pipe 41. The liquid pump 43 is preferably a hand pump, which serves to discharge the test cavity or supply pressure medium to the test cavity.

[0021] like Figure 1 and Figure 3 As shown, the inspection gas circuit 5 includes a three-way valve 51, one port of the three-way valve 51 is connected to the hard pipe 2, and the gas port 53 and the pressure gauge 52 are respectively installed on the other two ports of the three-way valve 51. The switching of the ports of the three-way valve 51 can enable the metal hose online inspection auxiliary system to quickly switch the working mode, and the mode switching efficiency is high.

[0022] The pressure gauge 52 is connected to the three-way valve 51 through a metal bellows. The display direction of the pressure gauge 52 can be adjusted by bending the metal bellows.

[0023] In particular, the line inspection auxiliary system also includes a disassembly traction device, which includes a traction motor, a winch and a tying hoop, one end of the winch is connected to the traction motor, and the other end is connected to the tying hoop, the traction motor is installed on the hard pipe 2, and the tying hoop is installed on the metal hose 1. Specifically, the disassembly traction device is divided into two groups, and the two groups of disassembly traction devices are arranged on both sides of the metal hose 1. The two groups of disassembly traction devices are output synchronously to ensure the stability of the disassembly of the metal hose 1.

[0024] When the utility model is used, the drain valves 3 located at both sides of the metal hose 1 are first closed to form a test cavity between the metal hose 1 and the hard pipe 2 .

[0025] When conducting an online inspection of the metal hose 1, firstly, the inspection chamber is emptied. Specifically, the branch valve 42 is opened first, and then the three-way valve 51 of the inspection gas circuit 5 is switched to the gas port 53, and then the liquid pump 43 is started to empty the medium in the inspection chamber. During the specific operation, a corresponding container can be connected to the output end of the liquid pump 43 according to the medium characteristics to avoid the medium from polluting the environment. Then, the metal hose 1 is disassembled. Specifically, the connecting bolts between the metal hose 1 and the hard pipe 2 are first removed, and then the metal hose 1 is lowered to an observable position using a disassembly traction device. The staff can conduct professional inspections on the inner and outer surfaces of the metal hose 1. After the inspection, the disassembly traction device is used to lift the metal hose 1 back to its original position, and the metal hose 1 and the hard pipe 2 are reconnected using bolts.

[0026] When conducting a comprehensive inspection of the metal hose 1, first switch the three-way valve 51 of the inspection gas circuit 5 to the end of the pressure gauge 52, and then use the liquid pump 43 to supply pressure medium to the inspection chamber; when conducting a pressure test, the metal hose 1 needs to be tested at 1.5 times the nominal pressure, and no leakage or damage to parts is allowed; when conducting an airtightness test, the metal hose 1 needs to be tested at 1.0 times the nominal pressure, and no air leakage is allowed. In particular, during a comprehensive inspection, the liquid pump 43 can be driven by a motor to achieve efficient inspection.

[0027] In summary, the purpose of the utility model is to prevent the safety risks and environmental pollution caused by leakage of media in the pipe. With the improvement of oil depot technology and the replacement of equipment and facilities, this solution can be used to update and improve the pipeline inspection technology in the oil depot, so as to reduce the equipment inspection cost, reduce the safety hazards caused by unsafe medium conditions, and follow the "people-oriented" production safety concept.

[0028] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings; however, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical scheme of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. An online inspection auxiliary system for a metal hose, comprising a hard pipe (2) and a drain valve (3), wherein two hard pipes (2) are flange-connected to two ends of a metal hose (1), and the ends of the two hard pipes (2) are flange-connected to the drain valve (3), and the drain valve (3) and the hard pipe (2) are used to form an inspection chamber that is sealed for the metal hose (1), characterized in that: The hard pipe (2) is connected to a test liquid circuit (4) and a test gas circuit (5); the test liquid circuit (4) cooperates with a gas port (53) of the test gas circuit (5) to exhaust the medium in the test cavity; the test liquid circuit (4) cooperates with a pressure gauge (52) to test the pressure of the test cavity.

2. The metal hose online inspection auxiliary system according to claim 1 is characterized in that: The inspection liquid circuit (4) comprises a branch pipe (41), a branch valve (42) and a liquid pump (43). One end of the branch pipe (41) is connected to the hard pipe (2), and the other end is connected to the liquid pump (43). The branch valve (42) is installed on the branch pipe (41).

3. The metal hose online inspection auxiliary system according to claim 2 is characterized in that: The inspection gas circuit (5) comprises a three-way valve (51), one port of the three-way valve (51) is connected to the hard pipe (2), and the gas port (53) and the pressure gauge (52) are respectively installed on the other two ports of the three-way valve (51).

4. The metal hose online inspection auxiliary system according to claim 3 is characterized in that: The pressure gauge (52) is connected to the three-way valve (51) via a metal bellows.

5. The metal hose online inspection auxiliary system according to claim 1 is characterized in that: The line inspection auxiliary system also includes a disassembly traction device, which includes a traction motor, a winch and a tying hoop, one end of the winch is connected to the traction motor, and the other end is connected to the tying hoop, the traction motor is installed on the hard pipe (2), and the tying hoop is installed on the metal hose (1).

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