A device for a pipeline with a function of detecting a corrosion coupon

Abstract

The application discloses a device with corrosion coupon function for pipeline, and relates to the technical field of corrosion coupon, which comprises two pipeline bodies and a communication pipeline installed between the two pipeline bodies, a fixing sleeve is installed on the outer surface of the communication pipeline, a lifting screw is threadedly connected to the inside of the fixing sleeve, and a lifting connecting rod is rotatably connected to the bottom end of the lifting screw. Through the cooperation of the communication pipeline, the fixing sleeve, the lifting screw, the lifting connecting rod, the connecting disc, the first limiting mechanism and the second limiting mechanism, when the corrosion coupon body moves to the inside of the communication pipeline, the first limiting mechanism and the second limiting mechanism can automatically clamp and fix the corrosion coupon body from multiple angles and directions, can prevent the flow of gas or liquid from causing the corrosion coupon body to shake or sway, can greatly increase the stability of the corrosion coupon body, and can increase the accuracy of the corrosion coupon body detection.

Description

Technical Field

[0001] This invention relates to the field of corrosion detection coating technology, specifically a device for pipelines with corrosion detection coating function. Background Technology

[0002] Steel pipelines are widely used in natural gas transportation, and the resulting corrosion problem is of great concern. During the transportation of natural gas, the presence of impurities such as water and the formation of hydrates can cause varying degrees of corrosion on the inner surface of the pipeline, leading to perforation and damage. When pipelines are damaged, minor issues may result in oil leaks and resource waste, while serious issues can lead to combustion and explosion, endangering lives and property. Therefore, studying the corrosion rate of natural gas pipelines is extremely important, and a device capable of detecting the corrosion rate of natural gas pipelines is needed to facilitate timely anti-corrosion measures when the corrosion rate is high.

[0003] A rotatable corrosion-resistant plate device is disclosed in patent CN107764727B, belonging to the field of corrosion monitoring technology for oil and gas field pipelines and equipment. The rotatable corrosion-resistant plate device of this invention includes three units: a power desulfurization unit, a power transmission unit, and a corrosion monitoring unit. The power desulfurization unit includes a rotating rod, a control rod, and a rotating wheel. The rotation state of the rotating wheel is controlled by changing the force angle of the rotating blades. The power transmission unit completes the energy transfer between the power desulfurization unit and the corrosion monitoring unit through a transmission wheel, a transmission rod, and a pre-stretched π-shaped transmission rod. The corrosion monitoring unit achieves continuous rotation of the π-shaped corrosion-resistant plate through power transmission. This invention designs the π-shaped plate to enhance its bending resistance, and the rotatable plate design prevents the plate from bending, breaking, or falling off. Through airflow vortex flow, it promotes the collision, agglomeration, and gravitational sedimentation of elemental sulfur. Simultaneously, the scouring and carrying effect of the airflow further reduces the deposition of elemental sulfur on the surface of the rotating plate, improving the accuracy of corrosion monitoring results.

[0004] Although the corrosion plate device in the aforementioned patent can reduce the deposition of elemental sulfur on the surface of the rotating plate, it is difficult to fix the corrosion plate inside the pipe after it is installed inside the pipe. When the gas or liquid inside the pipe flows, it is easy to cause the corrosion plate to shake or sway, which will affect the corrosion effect of the corrosion plate and thus affect the detection effect of the corrosion plate. Summary of the Invention

[0005] The purpose of this invention is to provide a device for detecting corrosion in pipelines by means of a corrosion-detecting insert, in order to solve the problems mentioned in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a device for detecting corrosion-resistant plates on a pipeline, comprising two pipeline bodies and a connecting pipeline installed between the two pipeline bodies. A fixed sleeve is installed on the outer surface of the connecting pipeline. A lifting screw is threadedly connected to the inside of the fixed sleeve. A lifting connecting rod is rotatably connected to the bottom end of the lifting screw. A connecting plate is fixedly connected to the bottom surface of the lifting connecting rod. Corrosion-resistant plate bodies, two first limiting mechanisms, and two second limiting mechanisms are arranged at equal intervals below the connecting plate. The first limiting mechanism includes a hinge plate.

[0007] Preferably, the outer surface of the hinge plate is hinged with two symmetrical first hinge rods, and a bottom fixing block is provided below the connecting plate. The ends of the two first hinge rods away from the hinge plate are respectively hinged to the bottom surface of the fixing sleeve and the outer surface of the bottom fixing block.

[0008] Preferably, a first telescopic rod is fixedly connected to the side of the hinge plate near the corrosion plate body, a clamping plate is fixedly connected to the telescopic end of the first telescopic rod, a fixing ring is fixedly connected to the outer surface of the first telescopic rod, two symmetrical second telescopic rods are hinged to the outer surface of the fixing ring, the ends of the two second telescopic rods away from the fixing ring are respectively hinged to the outer surfaces of the two first hinge rods, and equidistantly arranged partition blocks are fixedly connected to the side of the clamping plate near the corrosion plate body.

[0009] Preferably, the second limiting mechanism includes a fixed frame fixedly connected to the bottom end of the fixed sleeve. A first limiting rod is fixedly connected to the fixed frame. A first sliding rack is slidably connected to the outer surface of the first limiting rod. A movable frame is fixedly connected to the bottom surface of the first sliding rack. Two second limiting rods are fixedly connected to one side of the movable frame near the corrosion plate body. A second sliding rack and a movable crossbar are slidably connected to the outer surfaces of the two second limiting rods, respectively. A transmission gear is rotatably connected to the fixed frame. The transmission gear meshes with both the first and second sliding racks. A vertical connecting frame is fixedly connected between the second sliding rack and the movable crossbar.

[0010] Preferably, two diagonal braces are fixedly connected to one side of the movable frame near the corrosion plate body. Limiting grooves are provided on the sides of the second sliding rack and the movable crossbar that are close to each other. The ends of the two diagonal braces away from the movable frame are slidably connected to the inside of the two limiting grooves. A pressing block is fixedly connected to the ends of the second sliding rack and the movable crossbar near the corrosion plate body. A second hinge rod is hinged to the outer surface of the movable frame. The end of the second hinge rod away from the movable frame is hinged to the outer surface of the hinge plate.

[0011] Preferably, the upper surface of the bottom fixing block is provided with a first groove, the first groove is adapted to the bottom end of the corrosion hanging plate body, and the bottom surface of the bottom fixing block is fixedly connected with an anti-slip layer.

[0012] Preferably, a hanging plate connecting mechanism is provided below the connecting plate. The hanging plate connecting mechanism includes a bottom horizontal plate fixedly connected to the bottom surface of the connecting plate. A transverse slide rod is fixedly connected to the bottom surface of the bottom horizontal plate. A separating spring is sleeved on the outer surface of the transverse slide rod. One end of the bottom horizontal plate is fixed with an end fixing plate by a screw. Each corrosion hanging plate body is sleeved on the outer surface of the transverse slide rod.

[0013] Preferably, the outer surface of the lifting connecting rod is fixedly connected to two symmetrical limiting strips, the inner wall of the fixed sleeve is provided with two symmetrical limiting slides, the two limiting strips are slidably connected inside the two limiting slides respectively, the upper surface of the fixed sleeve is provided with a second groove, the upper end of the lifting screw is fixedly connected to a rotating disk, the outer surface of the upper end of the lifting screw is rotatably connected to an upper sealing plate, and the bottom surface of the upper sealing plate is fixedly connected to a sealing gasket that matches the second groove.

[0014] Preferably, a positive magnet is fixedly connected to the upper surface of the rotating disk, a support ring is provided above the connecting pipe, and a negative magnet is fixedly connected to the middle of the support ring, wherein the negative magnet and the positive magnet are attracted to each other.

[0015] Preferably, the outer surface of the support ring is fixedly connected to a circumferential array of track rods, the bottom end of each track rod is fixedly connected to the outer surface of the connecting pipe, a lifting ring is provided below the support ring, each track rod passes through the lifting ring and is slidably connected to the lifting ring, and an ultrasonic generator in a circumferential array is fixedly connected to the inner wall of the lifting ring.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This application, through the coordinated design of the connecting pipe, fixed sleeve, lifting screw, lifting connecting rod, connecting plate, first limiting mechanism and second limiting mechanism, enables the first limiting mechanism and second limiting mechanism to automatically clamp and fix the corrosion bracket body from multiple angles and directions after the corrosion bracket body moves into the interior of the connecting pipe. This prevents the corrosion bracket body from shaking or swaying due to the flow of gas or liquid, greatly increasing the stability of the corrosion bracket body and improving the accuracy of corrosion bracket body detection.

[0018] 2. This application, through the combined design of the bottom horizontal plate, the horizontal slide bar, the separating spring and the end fixing plate, can make multiple corrosion hanger bodies evenly separated on the outer surface of the horizontal slide bar, avoiding contact between corrosion hanger bodies. Furthermore, by comparing the test results of multiple corrosion hanger bodies, the error of the test results can be minimized, and more accurate test results can be obtained.

[0019] 3. This application utilizes a design that integrates a rotating disc, a positive magnet, a support ring, a negative magnet, a track rod, a lifting ring, and an ultrasonic generator. When the corrosion plate body needs to be removed, the lifting screw is rotated in the opposite direction. The lifting screw rises, causing the lifting connecting rod and the connecting disc to rise, which in turn moves the corrosion plate body above the connecting pipe. When the positive and negative magnets come into contact, they attract each other tightly, pulling the lifting ring up and down. The ultrasonic generator then inspects the outer surface of the corrosion plate body, making it convenient for workers to use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a device for detecting corrosion in pipelines according to the present invention.

[0021] Figure 2 This is a schematic diagram of the external three-dimensional structure of a device for detecting corrosion in a pipeline according to the present invention.

[0022] Figure 3 This is a schematic diagram of the internal three-dimensional structure of a pipeline with a corrosion detection clip device according to the present invention.

[0023] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the fixing sleeve of the device for detecting corrosion in pipelines according to the present invention.

[0024] Figure 5 This is a three-dimensional structural diagram of the first limiting mechanism of a device for detecting corrosion in pipelines according to the present invention;

[0025] Figure 6 This is a three-dimensional structural diagram of the second limiting mechanism of a device for detecting corrosion clips on pipelines according to the present invention;

[0026] Figure 7 This is a three-dimensional structural diagram of the hanging plate connection mechanism of a device for detecting corrosion hanging plates in pipelines according to the present invention;

[0027] Figure 8 This is a bottom-view three-dimensional structural diagram of a fixing sleeve for a pipeline device with a corrosion detection clip function according to the present invention;

[0028] Figure 9 This is a three-dimensional structural diagram of the clamping plate and partition block of a device for detecting corrosion in pipelines according to the present invention.

[0029] Numbering on the map:

[0030] 1. Pipe body; 2. Connecting pipe; 3. Fixed sleeve; 4. Lifting screw; 5. Lifting connecting rod; 6. Connecting plate;

[0031] 7. First limiting mechanism; 71. Hinge plate; 72. First hinge rod; 73. First telescopic rod; 74. Fixing ring; 75. Clamping plate; 76. Second telescopic rod; 77. Divider block;

[0032] 8. Second limiting mechanism; 81. Fixed frame; 82. First limiting rod; 83. First sliding rack; 84. Movable frame; 85. Second limiting rod; 86. Second sliding rack; 87. Transmission gear; 88. Vertical connecting frame; 89. Diagonal brace; 810. Limiting groove; 811. Pressing block; 812. Movable crossbar; 813. Second hinge rod;

[0033] 9. Bottom fixing block; 10. First groove; 11. Anti-slip layer;

[0034] 12. Hanging plate connecting mechanism; 120. Bottom horizontal plate; 121. Horizontal slide bar; 122. Separating spring; 123. End fixing plate;

[0035] 13. Corrosion plate body; 14. Limiting slide; 15. Limiting strip; 16. Second groove; 17. Upper sealing plate; 18. Rotating disk; 19. Positive magnet; 20. Support ring; 21. Negative magnet; 22. Track rod; 23. Lifting ring; 24. Ultrasonic generating device; 25. Sealing gasket. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1

[0038] like Figure 1 , Figure 2 and Figure 4As shown, this invention provides a technical solution for a device with a corrosion detection clip function for pipelines, including two pipeline bodies 1 and a connecting pipeline 2 installed between the two pipeline bodies 1. The pipeline bodies 1 and the connecting pipeline 2 can be connected by a flange. A fixing sleeve 3 is installed on the outer surface of the connecting pipeline 2. The fixing sleeve 3 can be fixed to the outer surface of the connecting pipeline 2 by a screw or by welding. In this application, a screw is preferred to install the fixing sleeve 3 on the outer surface of the connecting pipeline 2. A lifting screw 4 is threadedly connected inside the fixing sleeve 3. A lifting connecting rod 5 is rotatably connected to the bottom end of the lifting screw 4. When the lifting screw 4 is rotated, since the fixing sleeve 3 and the lifting screw 4 are threadedly connected, the lifting screw 4 can move up and down inside the fixing sleeve 3. Since the lifting screw 4 and the lifting connecting rod 5 are rotatably connected, the lifting connecting rod 5 can move up and down with the lifting screw 4.

[0039] like Figure 2 As shown, two symmetrical limiting strips 15 are fixedly connected to the outer surface of the lifting connecting rod 5. Two symmetrical limiting slides 14 are opened on the inner wall of the fixing sleeve 3. The two limiting strips 15 are slidably connected inside the two limiting slides 14 respectively. When the lifting connecting rod 5 moves up and down with the lifting screw 4, the limiting strips 15 slide inside the limiting slides 14 to limit and guide the lifting connecting rod 5, preventing the lifting connecting rod 5 from rotating with the lifting screw 4. A second concave section is opened on the upper surface of the fixing sleeve 3. The upper end of the lifting screw 4 is fixedly connected to the groove 16 and the rotating disk 18. Rotating the rotating disk 18 can drive the lifting screw 4 to rotate. The upper surface of the rotating disk 18 is fixedly connected to the positive pole magnet 19. A support ring 20 is set above the connecting pipe 2. The outer surface of the support ring 20 is fixedly connected to the track rods 22 arranged in a circular array. The bottom end of each track rod 22 is fixedly connected to the outer surface of the connecting pipe 2. Through the arrangement of the track rods 22 and the support ring 20, the negative pole magnet 21 can be supported and fixed.

[0040] A lifting ring 23 is provided below the support ring 20. Each track rod 22 passes through the lifting ring 23 and is slidably connected to the lifting ring 23. The lifting ring 23 can move up and down on the outer surface of the track rod 22. The outer surface of the lifting ring 23 is fixedly connected with handles arranged in a circular array to facilitate pulling the lifting ring 23 up and down. The inner wall of the lifting ring 23 is fixedly connected with ultrasonic generators 24 arranged in a circular array. The ultrasonic generators 24 are based on the ultrasonic pulse reflection method detection principle. According to the propagation characteristics of ultrasonic waves in the medium, the high-voltage negative pulse signal generated by the transmitting circuit can effectively excite the ultrasonic probe. The programmable amplifier circuit can solve the problem of energy attenuation of the echo signal due to the increase of depth. The obtained signal meets the technical requirements. This is the prior art, and it will not be described in detail in this application. Its main function in this application is to detect the corrosivity of the corrosion plate body 13.

[0041] like Figure 4 As shown, a negative magnet 21 is fixedly connected to the middle of the support ring 20. The negative magnet 21 attracts the positive magnet 19. When the positive magnet 19 and the negative magnet 21 come into contact, they can attract each other, thereby fixing the position of the lifting screw 4 and fixing the position of the corrosion hanging plate body 13 that has moved out of the connecting pipe 2. This facilitates the detection of the corrosion hanging plate body 13 by the ultrasonic generator 24. An upper sealing plate 17 is rotatably connected to the outer surface of the upper end of the lifting screw 4. A sealing gasket 25 that matches the second groove 16 is fixedly connected to the bottom surface of the upper sealing plate 17. When the rotating disk 18 descends, the sealing gasket 25 can be squeezed into the interior of the second groove 16, thereby sealing the upper sealing plate 17 and the fixed sleeve 3.

[0042] like Figure 7As shown, a connecting plate 6 is fixedly connected to the bottom surface of the lifting connecting rod 5. A hanging plate connecting mechanism 12 is provided below the connecting plate 6. The hanging plate connecting mechanism 12 includes a bottom horizontal plate 120 fixedly connected to the bottom surface of the connecting plate 6. A transverse slide rod 121 is fixedly connected to the bottom surface of the bottom horizontal plate 120. The bottom horizontal plate 120 is an L-shaped plate. One end of the transverse slide rod 121 is fixedly connected to one end of the bottom horizontal plate 120. A separating spring 122 is sleeved on the outer surface of the transverse slide rod 121. The separating spring 122 can separate multiple corrosion hanging plate bodies 13 and can make the corrosion hanging plate bodies 13 and corrosion hanging plates... The distance between the bodies 13 is the same to prevent the corrosion hanger bodies 13 from contacting each other. One end of the bottom horizontal plate 120 is fixed with an end fixing plate 123 by a screw. The end fixing plate 123 can limit the corrosion hanger body 13 and allow the corrosion hanger body 13 to slide on the outer surface of the horizontal slide bar 121. Each corrosion hanger body 13 is sleeved on the outer surface of the horizontal slide bar 121. When the horizontal slide bar 121 moves up and down with the lifting connecting rod 5 and the connecting plate 6, the corrosion hanger body 13 can also move up and down with the lifting connecting rod 5 and the connecting plate 6.

[0043] Example 2

[0044] like Figure 3 and Figure 6 As shown, below the connecting plate 6 are equidistantly arranged corrosion plate bodies 13, two first limiting mechanisms 7, and two second limiting mechanisms 8. The second limiting mechanism 8 includes a fixed frame 81 fixedly connected to the bottom end of the fixed sleeve 3. A first limiting rod 82 is fixedly connected to the fixed frame 81. A first sliding rack 83 is slidably connected to the outer surface of the first limiting rod 82. The fixed frame 81 can provide fixed support. The first sliding rack 83 can slide on the outer surface of the first limiting rod 82. The first limiting rod 82 can limit and guide the first sliding rack 83. A movable frame 84 is fixedly connected to the bottom surface of the first sliding rack 83. Two second limiting rods 85 are fixedly connected to the side of the movable frame 84 near the corrosion plate body 13. A second sliding rack 86 and a movable crossbar 812 are slidably connected to the outer surfaces of the two second limiting rods 85, respectively. The second limiting rods 85 can limit the second sliding rack 86 and the movable crossbar 812.

[0045] The second sliding rack 86 and the moving crossbar 812 can be slidably connected on the outer surface of the second limiting rod 85. A transmission gear 87 is rotatably connected to the fixed frame 81. The transmission gear 87 meshes with both the first sliding rack 83 and the second sliding rack 86. When the moving frame 84 moves, the first sliding rack 83 can drive the transmission gear 87 to rotate. When the transmission gear 87 rotates, it can drive the second sliding rack 86 and the moving crossbar 812 to move in the opposite direction to the first sliding rack 83. A vertical connecting frame 88 is fixedly connected between the second sliding rack 86 and the moving crossbar 812. The vertical connecting frame 88 can connect the second sliding rack 86 and the moving crossbar 812 together, so that the second sliding rack 86 and the moving crossbar 812 can move simultaneously.

[0046] Two diagonal braces 89 are fixedly connected to one side of the movable frame 84 near the corrosion plate body 13. Limiting grooves 810 are provided on the sides of the second sliding rack 86 and the movable crossbar 812 that are close to each other. The ends of the two diagonal braces 89 away from the movable frame 84 are slidably connected inside the two limiting grooves 810. The sliding of the diagonal braces 89 within the limiting grooves 810 enhances the stability of the second sliding rack 86 and the movable crossbar 812 during movement. The ends of the second sliding rack 86 and the movable crossbar 812 near the corrosion plate body 13 are... A pressing block 811 is fixedly connected. When the pressing block 811 comes into contact with the corrosion hanger body 13, it can clamp and fix the corrosion hanger body 13 to prevent it from shaking or vibrating. A second hinge rod 813 is hinged to the outer surface of the movable frame 84. The end of the second hinge rod 813 away from the movable frame 84 is hinged to the outer surface of the hinge plate 71. When the hinge plate 71 moves, the movable frame 84 can be moved by the second hinge rod 813, which in turn can move the second sliding rack 86 and the moving crossbar 812.

[0047] Example 3

[0048] like Figure 5 and Figure 9 As shown, the first limiting mechanism 7 includes a hinge plate 71, with two symmetrical first hinge rods 72 hinged to the outer surface of the hinge plate 71. A bottom fixing block 9 is provided below the connecting plate 6. A first groove 10 is provided on the upper surface of the bottom fixing block 9. The first groove 10 is adapted to the bottom end of the corrosion hanging plate body 13. When the lifting screw 4 pushes the corrosion hanging plate body 13 down, the bottom end of the corrosion hanging plate body 13 can enter the interior of the first groove 10, thereby pushing the bottom fixing block 9 to move downward. An anti-slip layer 11 is fixedly connected to the bottom surface of the bottom fixing block 9. When the anti-slip layer 11 contacts the inner wall of the connecting pipe 2, it can enhance the friction between the bottom fixing block 9 and the inner wall of the connecting pipe 2, thereby enhancing the stability of the bottom fixing block 9.

[0049] The ends of the two first hinge rods 72 away from the hinge plate 71 are respectively hinged to the bottom surface of the fixed sleeve 3 and the outer surface of the bottom fixed block 9. When the bottom fixed block 9 moves downward, the hinge plate 71 can move towards the corrosion hanger body 13. The side of the hinge plate 71 near the corrosion hanger body 13 is fixedly connected to the first telescopic rod 73. The first telescopic rod 73 is equipped with a support spring. The telescopic end of the first telescopic rod 73 is fixedly connected to the clamping plate 75. The hinge plate 71 can drive the first telescopic rod 73 and the clamping plate 75 to move.

[0050] A fixing ring 74 is fixedly connected to the outer surface of the first telescopic rod 73. Two symmetrical second telescopic rods 76 are hinged to the outer surface of the fixing ring 74. Compression springs are installed inside the second telescopic rods 76. The ends of the two second telescopic rods 76 away from the fixing ring 74 are respectively hinged to the outer surfaces of the two first hinge rods 72. The second telescopic rods 76 enhance the stability between the first telescopic rod 73 and the two first hinge rods 72. The clamping plate 75 is fixedly connected to the side of the corrosion hanger body 13 with equally spaced partition blocks 77. When the two clamping plates 75 approach the corrosion hanger body 13, the partition blocks 77 can be inserted between the corrosion hanger body 13 and the corrosion hanger body 13, which can separate the corrosion hanger body 13 and make the corrosion hanger body 13 have strong stability.

[0051] Working principle:

[0052] In use, when it is necessary to place the corrosion hanger body 13 inside the connecting pipe 2, firstly, place the corrosion hanger body 13 one by one on the outer surface of the horizontal slide bar 121, with the corrosion hanger body 13 separated from each other by the separating spring 122. Then, rotate the rotating disk 18, which drives the lifting screw 4 to rotate. The rotation of the lifting screw 4 drives the lifting connecting rod 5 to move downward, thereby placing the corrosion hanger body 13 inside the connecting pipe 2. Once the corrosion hanger body 13 enters the connecting pipe 2... The bottom fixing block 9 will continue to be pushed downwards until the anti-slip layer 11 contacts the inner wall of the connecting pipe 2. During the downward movement of the bottom fixing block 9, the hinge plate 71 will move towards the corrosion hanger body 13, thereby allowing the separator block 77 to be inserted between the corrosion hanger bodies 13, limiting the corrosion hanger body 13. The clamping plate 75 can also limit and fix the corrosion hanger body 13 from two opposite directions, reducing the impact of gas or liquid on the corrosion hanger body 13. The phenomenon of shaking or vibration is observed. During the movement of the hinge plate 71 towards the corrosion plate body 13, the second hinge rod 813 can cause the moving frame 84 to move away from the corrosion plate body 13. When the moving frame 84 moves away from the corrosion plate body 13, it can drive the first sliding rack 83 to move, which in turn drives the transmission gear 87 to rotate. When the transmission gear 87 rotates, it can drive the second sliding rack 86 to move in the opposite direction to the first sliding rack 83, thereby driving the moving frame 84 to move away from the corrosion plate body 13. The moving crossbar 812 moves toward the corrosion hanger body 13, thereby simultaneously clamping and fixing the upper and lower parts of the corrosion hanger body 13 by the pressure blocks 811 on both sides. This application can automatically clamp and fix the corrosion hanger body 13 from multiple directions after it is placed inside the connecting pipe 2, which can prevent the corrosion hanger body 13 from shaking or swaying due to the flow of gas or liquid, greatly increasing the stability of the corrosion hanger body 13 and increasing the accuracy of the detection results of the corrosion hanger body 13.

[0053] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A device for detecting corrosion on pipelines, comprising two pipeline bodies (1) and a connecting pipe (2) installed between the two pipeline bodies (1), characterized in that: A fixed sleeve (3) is installed on the outer surface of the connecting pipe (2). A lifting screw (4) is threaded inside the fixed sleeve (3). A lifting connecting rod (5) is rotatably connected to the bottom end of the lifting screw (4). A connecting plate (6) is fixedly connected to the bottom surface of the lifting connecting rod (5). Corrosion hanging plate bodies (13), two first limiting mechanisms (7), and two second limiting mechanisms (8) are arranged at equal intervals below the connecting plate (6). The first limiting mechanism (7) includes a hinge plate (71).

2. The device for detecting corrosion on pipelines according to claim 1, characterized in that: The outer surface of the hinge plate (71) is hinged with two symmetrical first hinge rods (72). A bottom fixing block (9) is provided below the connecting plate (6). The ends of the two first hinge rods (72) away from the hinge plate (71) are respectively hinged to the bottom surface of the fixing sleeve (3) and the outer surface of the bottom fixing block (9).

3. A device for detecting corrosion on pipelines according to claim 2, characterized in that: The hinge plate (71) is fixedly connected to a first telescopic rod (73) on one side near the corrosion plate body (13). The telescopic end of the first telescopic rod (73) is fixedly connected to a clamping plate (75). The outer surface of the first telescopic rod (73) is fixedly connected to a fixing ring (74). The outer surface of the fixing ring (74) is hinged to two symmetrical second telescopic rods (76). The ends of the two second telescopic rods (76) away from the fixing ring (74) are respectively hinged to the outer surfaces of the two first hinge rods (72). The clamping plate (75) is fixedly connected to a partition block (77) arranged at equal intervals on one side near the corrosion plate body (13).

4. A device for detecting corrosion on pipelines according to claim 1, characterized in that: The second limiting mechanism (8) includes a fixed frame (81) fixedly connected to the bottom end of the fixed sleeve (3). A first limiting rod (82) is fixedly connected to the fixed frame (81). A first sliding rack (83) is slidably connected to the outer surface of the first limiting rod (82). A movable frame (84) is fixedly connected to the bottom surface of the first sliding rack (83). Two second limiting rods (85) are fixedly connected to one side of the movable frame (84) near the corrosion plate body (13). A second sliding rack (86) and a movable crossbar (812) are slidably connected to the outer surfaces of the two second limiting rods (85). A transmission gear (87) is rotatably connected to the fixed frame (81). The transmission gear (87) meshes with both the first sliding rack (83) and the second sliding rack (86). A vertical connecting frame (88) is fixedly connected between the second sliding rack (86) and the movable crossbar (812).

5. A device for detecting corrosion on pipelines according to claim 4, characterized in that: Two diagonal braces (89) are fixedly connected to one side of the movable frame (84) near the corrosion plate body (13). Limiting grooves (810) are provided on the side of the second sliding rack (86) and the moving crossbar (812) that are close to each other. The ends of the two diagonal braces (89) away from the movable frame (84) are slidably connected to the inside of the two limiting grooves (810). Pressing blocks (811) are fixedly connected to the ends of the second sliding rack (86) and the moving crossbar (812) near the corrosion plate body (13). A second hinge rod (813) is hinged to the outer surface of the movable frame (84). The end of the second hinge rod (813) away from the movable frame (84) is hinged to the outer surface of the hinge plate (71).

6. A device for detecting corrosion on pipelines according to claim 2, characterized in that: The upper surface of the bottom fixing block (9) is provided with a first groove (10), which is adapted to the bottom end of the corrosion hanging plate body (13). The bottom surface of the bottom fixing block (9) is fixedly connected with an anti-slip layer (11).

7. A device for detecting corrosion on pipelines according to claim 1, characterized in that: A hanging plate connecting mechanism (12) is provided below the connecting plate (6). The hanging plate connecting mechanism (12) includes a bottom horizontal plate (120) fixedly connected to the bottom surface of the connecting plate (6). A horizontal slide rod (121) is fixedly connected to the bottom surface of the bottom horizontal plate (120). A separating spring (122) is sleeved on the outer surface of the horizontal slide rod (121). One end of the bottom horizontal plate (120) is fixed with an end fixing plate (123) by a screw. Each corrosion hanging plate body (13) is sleeved on the outer surface of the horizontal slide rod (121).

8. A device for detecting corrosion on pipelines according to claim 1, characterized in that: Two symmetrical limiting strips (15) are fixedly connected to the outer surface of the lifting connecting rod (5). Two symmetrical limiting slides (14) are opened on the inner wall of the fixed sleeve (3). The two limiting strips (15) are slidably connected inside the two limiting slides (14). A second groove (16) is opened on the upper surface of the fixed sleeve (3). A rotating disk (18) is fixedly connected to the upper end of the lifting screw (4). An upper sealing plate (17) is rotatably connected to the outer surface of the upper end of the lifting screw (4). A sealing gasket (25) that matches the second groove (16) is fixedly connected to the bottom surface of the upper sealing plate (17).

9. A device for detecting corrosion on pipelines according to claim 8, characterized in that: A positive magnet (19) is fixedly connected to the upper surface of the rotating disk (18), and a support ring (20) is provided above the connecting pipe (2). A negative magnet (21) is fixedly connected to the middle of the support ring (20), and the negative magnet (21) attracts the positive magnet (19).

10. A device for detecting corrosion on pipelines according to claim 9, characterized in that: The outer surface of the support ring (20) is fixedly connected to a circular array of track rods (22), the bottom end of each track rod (22) is fixedly connected to the outer surface of the connecting pipe (2), a lifting ring (23) is provided below the support ring (20), each track rod (22) passes through the lifting ring (23) and is slidably connected to the lifting ring (23), and an ultrasonic generator (24) in a circular array is fixedly connected to the inner wall of the lifting ring (23).

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