In-pipe inspection equipment

Abstract

The present invention discloses an in-pipe inspection device, comprising: at least two cylinders arranged at intervals along the flowing direction of the medium in the pipeline, and adjacent cylinders are connected by a universal joint. A main driving leather cup closely fitted with the inner wall of the pipeline is installed on each cylinder. A secondary driving leather cup is installed behind the main driving leather cup on the cylinder. The outer diameter of the secondary driving leather cup installed on the same cylinder is smaller than that of the main driving leather cup, and the outer diameter of the main driving leather cup installed on the front cylinder is larger than that of the main driving leather cup installed on the rear cylinder. An elastic sealing part closely fitted with the inner wall of the pipeline is provided on the body of the secondary driving leather cup, and the outer surface of the elastic sealing part contacts the inner wall surface of the pipeline. The present invention can maintain the sealing performance with the inner wall of the pipeline during the continuous operation in a longer-distance pipeline, so as to provide a stable driving force.

Description

Technical Field

[0001] The present invention relates to an in-pipe inspection device, belonging to the technical field of pipeline equipment. Background Art

[0002] Pipelines are important facilities for transporting liquids and gases and are widely used in water supply, drainage, heating, gas supply, long-distance transportation of oil and natural gas, agricultural irrigation, hydraulic engineering, and various industrial installations. After long-term use, pipelines are prone to varying degrees of damage and deformation, resulting in reduced efficiency of oil and gas transportation, increased losses due to leakage during transportation, and serious safety hazards. Therefore, it is necessary to regularly inspect pipelines to ensure their integrity and the safety of the surrounding area, reduce the risk of pipeline operation and management, and reduce the occurrence of operation and production accidents. When an in-pipe detector for oil and gas pipelines conducts pigging and inspection operations in a pipeline, it relies on the pressure difference of the conveying medium to provide power. The power for the detector to travel in the pipeline comes from the pressure difference acting on the driving cup by the fluid in the pipeline. In the prior art, it is often necessary to replace the worn cups to ensure the power for the detector to travel in the pipeline. Otherwise, the device may get stuck in the pipeline due to the loss of the power to travel. Summary of the Invention

[0003] The object of the present invention is to provide an in-pipe inspection device that can maintain the sealing performance with the inner wall of the pipeline and provide stable driving force during the continuous operation in a longer pipeline.

[0004] To achieve the above object, the technical solution adopted by the present invention is: an in-pipe inspection device, including: at least two cylinders arranged at intervals along the flowing direction of the medium in the pipeline, adjacent cylinders are connected by a universal joint, a main driving cup closely fitted with the inner wall of the pipeline is installed on each cylinder, a secondary driving cup is installed behind the main driving cup on the cylinder, the outer diameter of the secondary driving cup installed on the same cylinder is smaller than that of the main driving cup, and the outer diameter of the main driving cup installed on the front cylinder is larger than that of the main driving cup installed on the rear cylinder;

[0005] The body of the secondary driving cup has an elastic sealing portion closely fitted with the inner wall of the pipeline, the outer surface of the elastic sealing portion contacts the inner wall surface of the pipeline, a plurality of mounting grooves are circumferentially and spacedly distributed on the outer surface of the elastic sealing portion, a mounting through hole is opened at the central region of the bottom of the mounting groove, the inner wall of the mounting through hole is closely fitted with the waist portion of a rigid body, both ends of the waist portion of the rigid body respectively have a large head portion and a small head portion, the outer surface of the large head portion embedded in the mounting groove is flush with or slightly protrudes from the outer surface of the elastic sealing portion, and the small head portion is located inside the elastic sealing portion.

[0006] The further improved solutions in the above technical solutions are as follows:

[0007] 1. In the above solution, there are 3 sections of cylinders, namely the battery section cylinder, the adapter box section cylinder, and the operation section cylinder.

[0008] 2. In the above solution, the operation section cylinder is any one of the diameter measuring section cylinder, the magnetic flux leakage detection section cylinder, the inertial navigation section cylinder, and the pigging section cylinder.

[0009] 3. In the above solution, the large head part is a spherical part.

[0010] 4. In the above solution, several of the rigid bodies are arranged at equal intervals along the entire circumference.

[0011] 5. In the above solution, the rigid body is a ceramic body.

[0012] Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art:

[0013] The in-pipe inspection equipment of the present invention, through the combined setting of the main and auxiliary leather cups with different outer diameters and the rigid sphere and the elastic auxiliary leather cup, can maintain the sealing performance with the inner wall of the pipeline during the continuous operation in a longer pipeline, thereby providing a stable driving force, and avoiding the situation that the equipment is stuck in the pipeline due to excessive wear of the leather cup and seal failure; in addition, a plurality of circumferentially spaced installation grooves are provided on the outer surface of the elastic sealing part, a mounting through hole is provided in the central area at the bottom of the installation groove, the inner wall of the mounting through hole is closely fitted with the waist of a rigid body, both ends of the waist of the rigid body have a large head part and a small head part respectively, the outer surface of the large head part embedded in the installation groove is flush with the outer surface of the elastic sealing part or slightly protrudes from the outer surface of the elastic sealing part, and the small head part is located inside the elastic sealing part, which not only facilitates the loading and unloading of the rigid body, but also ensures the integrity between the rigid body and the main body, so that the rigid body can always keep in contact with the inner wall of the pipeline along with the elastic deformation of the main body, thereby realizing the continuous and stable alternating friction between the inner wall of the pipeline, the rigid body, and the leather cup main body, further improving the wear resistance performance to maintain the driving force stability in the long pipeline. Description of the Drawings

[0014] Attached Figure 1 is the structural decomposition diagram of the front end of the in-pipe inspection equipment of the present invention;

[0015] Attached Figure 2 is the structural decomposition diagram of the rear end of the in-pipe inspection equipment of the present invention;

[0016] Attached Figure 3 is the structural diagram of the auxiliary driving leather cup in the in-pipe inspection equipment of the present invention;

[0017] AttachedFigure 4 This is a structural sectional view of the auxiliary drive leather cup in the in-pipe inspection equipment of the present invention;

[0018] Appendix Figure 5 This is a partial structural sectional view of the auxiliary drive leather cup in the in-pipe inspection equipment of the present invention.

[0019] In the above figures: 100, main drive leather cup; 200, auxiliary drive leather cup; 1, body; 11, elastic sealing part; 121, bottom of the cup; 122, wall of the cup; 123, rim of the cup; 2, rigid body; 21, large head; 22, waist; 23, small head; 31, mounting groove; 32, mounting through-hole; 300, cylinder; 400, universal joint. Specific embodiments

[0020] The present patent can be further clearly understood through the following specific embodiments, but they do not limit the present patent.

[0021] Embodiment 1: An in-pipe inspection equipment, comprising: at least two cylinders 300 arranged at intervals along the flowing direction of the medium in the pipe, adjacent cylinders 300 are connected by a universal joint 400, a main drive leather cup 100 closely fitted with the inner wall of the pipe is installed on each cylinder 300, an auxiliary drive leather cup 200 is installed behind the main drive leather cup 100 on the cylinder 300, the outer diameter of the auxiliary drive leather cup 200 installed on the same cylinder 300 is smaller than the outer diameter of the main drive leather cup 100, and the outer diameter of the main drive leather cup 100 installed on the front cylinder 300 is larger than the outer diameter of the main drive leather cup 100 installed on the rear cylinder 300;

[0022] The body 1 of the auxiliary drive leather cup 200 has an elastic sealing part 11 closely fitted with the inner wall of the pipe, the outer surface of the elastic sealing part 11 contacts the inner wall surface of the pipe, a plurality of mounting grooves 31 spaced circumferentially are formed on the outer surface of the elastic sealing part 11, a mounting through-hole 32 is formed in the central area at the bottom of the mounting groove 31, the inner wall of the mounting through-hole 32 is closely fitted with the waist 22 of a rigid body 2, large heads 21 and small heads 23 are respectively arranged at both ends of the waist 22 of the rigid body 2, the outer surface of the large head 21 embedded in the mounting groove 31 is flush with the outer surface of the elastic sealing part 11, and the small head 23 is located inside the elastic sealing part 11.

[0023] There are 3 cylinders 300, which are respectively a battery cylinder, a transfer box cylinder and an operation cylinder; the above operation cylinder is any one of a diameter measuring cylinder, a magnetic flux leakage detection cylinder, an inertial navigation cylinder and a pigging cylinder.

[0024] Embodiment 2: An in-pipe inspection device, comprising: at least two cylinders 300 arranged at intervals along the flowing direction of the medium in the pipe, and adjacent cylinders 300 are connected by a universal joint 400. A main driving leather cup 100 that closely fits with the inner wall of the pipe is installed on each cylinder 300. A secondary driving leather cup 200 is installed on the cylinder 300 behind the main driving leather cup 100. The outer diameter of the secondary driving leather cup 200 installed on the same cylinder 300 is smaller than that of the main driving leather cup 100, and the outer diameter of the main driving leather cup 100 installed on the front cylinder 300 is larger than that of the main driving leather cup 100 installed on the rear cylinder 300;

[0025] The body 1 of the secondary driving leather cup 200 has an elastic sealing portion 11 that closely fits with the inner wall of the pipe. The outer surface of the elastic sealing portion 11 contacts the inner wall surface of the pipe. A plurality of mounting grooves 31 are formed on the outer surface of the elastic sealing portion 11 at intervals along the circumferential direction. A mounting through hole 32 is formed in the central region at the bottom of the mounting groove 31. The inner wall of the mounting through hole 32 closely fits with the waist 22 of a rigid body 2. The two ends of the waist 22 of the rigid body 2 respectively have a large head 21 and a small head 23. The outer surface of the large head 21 embedded in the mounting groove 31 slightly protrudes from the outer surface of the elastic sealing portion 11, and the small head 23 is located inside the elastic sealing portion 11.

[0026] The above-mentioned large head 21 is a spherical portion; a plurality of the above-mentioned rigid bodies 2 are arranged at equal intervals along the entire circumference; the above-mentioned rigid body 2 is a ceramic body; the above-mentioned elastic sealing portion 11 is a polyurethane sealing portion;

[0027] The above-mentioned body 1 further comprises: a bowl bottom 121, a bowl wall 122 and a bowl rim 123 connected in sequence, and the above-mentioned rigid sphere 2 is installed on the bowl rim 123;

[0028] The included angle formed between the obliquely arranged bowl wall 122 and the bowl bottom 121 is greater than 90°, and the included angle formed between the bowl rim 123 and the bowl wall 122 is not less than 90°.

[0029] First, through the cooperation of the main and secondary leather cups, at the initial stage of traveling in the pipe, the driving force is mainly provided by the interaction between the main leather cup and the inner wall of the pipe, and the secondary leather cup remains relatively intact;

[0030] As the traveling mileage in the pipe increases, the rigid spheres and the elastic leather cup body alternately generate friction with the inner wall of the pipe. Moreover, the elastic leather cup body can generate a certain deformation under the action of the medium so as to maintain close fit with the inner wall of the pipe, thereby improving the overall wear resistance, enabling the leather cup to still maintain the integrity of its shape and fit with the inner wall of the pipe to provide driving force during long-time operation in a long pipeline.

[0031] Using the above-mentioned in-pipe inspection equipment, through the combination of the main and auxiliary leather cups with different outer diameters, and the rigid sphere and the elastic auxiliary leather cup, it can maintain the sealing performance with the inner wall of the pipeline during the continuous operation in a longer-distance (hundreds of kilometers) pipeline, so as to provide a stable driving force, and avoid the situation that the equipment is stuck in the pipeline due to excessive wear of the leather cup and seal failure;

[0032] In addition, a number of circumferentially spaced mounting grooves are provided on the outer surface of the elastic sealing part. A mounting through-hole is provided in the central area of the bottom of the mounting groove. The inner wall of the mounting through-hole is in close fit with the waist of a rigid body. The two ends of the waist of the rigid body respectively have a large head and a small head. The outer surface of the large head embedded in the mounting groove is flush with or slightly protrudes from the outer surface of the elastic sealing part. The small head is located inside the elastic sealing part, which is convenient for the loading and unloading of the rigid body and ensures the integrity between the rigid body and the main body, so that the rigid body can always keep in contact with the inner wall of the pipeline along with the elastic deformation of the main body, thereby realizing the continuous and stable alternating friction between the inner wall of the pipeline, the rigid body and the leather cup main body, further improving the wear resistance performance to maintain the driving force stability in the long-distance pipeline.

[0033] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention, and their purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. An in-pipe inspection device, comprising: At least two cylinders (300) are arranged at intervals along the flow direction of the medium in the pipeline, and adjacent cylinders (300) are connected by a universal joint (400). A main driving cup (100) that closely matches the inner wall of the pipeline is installed on each of the cylinders (300), characterized in that: a secondary driving cup (200) is installed on the cylinder (300) and located behind the main driving cup (100), the outer diameter of the secondary driving cup (200) installed on the same cylinder (300) is smaller than the outer diameter of the main driving cup (100), and the outer diameter of the main driving cup (100) installed on the front cylinder (300) is larger than the outer diameter of the main driving cup (100) installed on the rear cylinder (300); The main body (1) of the auxiliary driving leather cup (200) has an elastic sealing portion (11) that is tightly matched with the inner wall of the pipeline. The outer surface of the elastic sealing portion (11) contacts the inner wall of the pipeline. The outer surface of the elastic sealing portion (11) is provided with a plurality of installation grooves (31) distributed along the circumferential direction. The central area of the bottom of the installation groove (31) is provided with an installation through hole (32). The inner wall of the installation through hole (32) is tightly matched with the waist (22) of a rigid body (2). The waist (22) of the rigid body (2) has a large head (21) and a small head (23) at both ends. The outer surface of the large head (21) embedded in the installation groove (31) is flush with the outer surface of the elastic sealing portion (11) or slightly protrudes from the outer surface of the elastic sealing portion (11). The small head (23) is located on the inner side of the elastic sealing portion (11).

2. The in-pipe inspection device according to claim 1, wherein: Three cylinder sections (300) are provided, namely a battery cylinder section, a transfer box cylinder section and an operation cylinder section.

3. The in-pipe inspection device according to claim 2, wherein: The working joint cylinder is any one of a diameter measuring joint cylinder, a magnetic leakage detection joint cylinder, an inertial navigation joint cylinder, and a pipe cleaning joint cylinder.

4. The in-pipe inspection device according to claim 1, wherein: The large head (21) is a spherical part.

5. The in-pipe inspection device according to claim 1, characterized in that: A plurality of the rigid bodies (2) are arranged at equal intervals along the entire circumference.

6. The in-pipe inspection device according to claim 1, wherein: The rigid body (2) is a ceramic body.

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