A pipeline steel H2S corrosion simulation test device

Abstract

The invention discloses a pipeline steel H2S corrosion simulation test device, comprising a test box, wherein a lifting base is installed in the test box, a lifting mechanism is installed between the lifting base and the bottom wall of the test box, a bottom clamp seat is fixedly connected to the upper side of the lifting base, a top clamp seat is fixedly connected above the bottom clamp seat and located on the top wall of the test box, a pipe body is clamped and fixed between the bottom clamp seat and the top clamp seat, a filling column is installed inside the top clamp seat, and the pipe body can be clamped and loosened by arranging the lifting base, the lifting mechanism, the bottom clamp seat and the top clamp seat, so as to facilitate loading and unloading of the pipe body, the core position of the filling column can be adjusted, so as to change the state of the detection flow channel in the pipe body, and the core body is adjusted to the top of the pipe body so that the pipe body can be in a full-diameter transportation state, so as to fully simulate the use state of the pipeline steel, and the core body is inserted into the pipe body, so as to reduce the volume of the pipe cavity.

Description

Technical Field

[0001] The invention relates to the technical field of test equipment, in particular to a pipeline steel H2S corrosion simulation test device. Background Art

[0002] The oil and gas pipeline network is the most convenient and safest channel connecting resource areas and market areas. Its rapid construction will not only ease the pressure on my country's railway transportation, but also help ensure the safe supply of the oil and gas market and improve my country's energy security level and capabilities. The basis for processing and manufacturing oil and gas pipelines is pipeline steel materials. During use, in addition to requiring high compressive strength, it is also required to have high low-temperature toughness, corrosion resistance and excellent welding performance; the performance of pipeline steel needs to be tested and inspected before use.

[0003] There is a pipeline steel H2S corrosion simulation test, which inputs the prepared test gas into the test pipe section, and then analyzes and evaluates the corrosion of the test gas on the test pipe section by analyzing the test gas flowing out of the test pipe section and the corrosion of the inner wall of the pipeline steel. Since the corrosion parameters of the inner wall of the pipeline steel need to be measured after corrosion, the test device also needs to test different test pipe sections, so the test pipe sections are often loaded and unloaded, and the existing test device is not easy to load and unload the test pipe sections. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a pipeline steel H2S corrosion simulation test device which is easy to load and unload the pipe body for testing.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pipeline steel HS corrosion simulation test device, comprising a test box, a lifting base is installed in the test box, a lifting mechanism is installed between the lifting base and the bottom wall of the test box, a bottom clamp seat is fixedly connected to the upper side of the lifting base, a top clamp seat is fixedly connected above the bottom clamp seat and located on the top wall of the test box, a pipe body is clamped and fixed between the bottom clamp seat and the top clamp seat, a filling column is installed inside the top clamp seat, a guide tube and a detection tube are provided on the outer wall of the test box, the filling column comprises a support arranged in the top clamp seat and a core body arranged in the support that slides up and down and cannot rotate, when the bottom end of the core body of the filling column slides into the pipe body, a detection flow channel is formed between the guide tube, the detection tube and the gap between the pipe body and the core body of the filling column.

[0006] As a preferred embodiment of the present invention, a pressure cylinder is fixedly embedded in the middle of the bottom clamp seat, and a plurality of guide grooves are opened on the side wall of the pressure cylinder. A transmission ring is fixedly connected to the edge of the bottom clamp seat, and the transmission ring has an annular inner cavity, and a gear ring is rotatably connected to the inner cavity wall of the transmission ring, and a plurality of gear columns are meshingly connected to the outer side of the gear ring, and the two ends of the rotating shaft of the gear column are respectively rotatably embedded in the upper and lower walls of the inner cavity of the transmission ring, and the lower part of the gear column is meshingly connected with a rack, and one end of the rack is fixedly connected to a guide rod, and the guide rod is slidably embedded in the inner wall of the bottom clamp seat, and the ends of the guide rods extending out of the bottom clamp seat are fixedly connected to clamp plates, and a tube body is clamped and fixed between the plurality of clamp plates, and the rotating shaft of one of the gear columns passes through the bottom clamp seat and is fixedly connected to a clamping handle.

[0007] As a preferred embodiment of the present invention, thread grooves are provided on the upper and lower end walls of the top clamp seat, and the thread groove on the lower side is threadedly connected to a clamping plate, and the cross-section of the clamping plate is a "convex" shaped structure. A through groove is provided in the middle of the clamping plate, and the size of the through groove is larger than the size of the filling column and smaller than the size of the tube body, and sealing rubber pads are bonded to the opposite sides of the clamping plate and the bottom clamp seat.

[0008] As a preferred embodiment of the present invention, the core body of the filling column includes a cover plate, a hollow column is fixedly connected to the lower side of the cover plate, a ceramic tube is sleeved on the outer side of the hollow column, when the core body slides to the lowest position on the support, the bottom end surface of the ceramic tube is arranged in contact with the pressure tube, the support is threadedly connected to the upper thread groove, and a handle is fixedly connected to the top wall of the cover plate.

[0009] As a preferred embodiment of the present invention, the guide tube is located above the detection tube, one end of the guide tube extends to the inside of the top clamp seat, and one end of the detection tube extends to the guide groove.

[0010] As a preferred embodiment of the present invention, an opening is provided at the upper front portion of the test box, a box door is hingedly connected to one side of the opening, and a transparent glass is fixedly embedded in the middle of the box door.

[0011] As a preferred embodiment of the present invention, the lifting mechanism includes a bidirectional screw rod, which is rotatably embedded between the inner walls of both sides of the test box, and the outer sides of both ends of the bidirectional screw rod are threadedly connected with sliders, and the sliders are slidably connected to the bottom wall of the test box. The top ends of the sliders are hinged with inclined rods, and the top ends of the two inclined rods are hinged to the bottom wall of the lifting base, and the two inclined rods are arranged opposite to each other in an "eight" shape, and one end of the bidirectional screw rod passes through the test box and is fixedly connected to a lifting handle.

[0012] As a preferred embodiment of the present invention, the lifting base is designed as a hollow structure, a grid plate is fixedly embedded in the lifting base, and the outer wall of the lifting base is slidably connected to the inner wall of the test box.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: through the arrangement of the lifting base, the lifting mechanism, the bottom clamp seat, and the top clamp seat, the tube body can be clamped and loosened, thereby facilitating the loading and unloading of the tube body; the core position of the filling column can be adjusted, thereby being able to change the state of the detection channel in the tube body; the core body is adjusted to above the tube body so that the tube body can be in a full-diameter transportation state, thereby fully simulating the use state of pipeline steel; the core body is inserted into the tube body, which can reduce the volume of the tube cavity and reduce the amount of oil or natural gas used for testing, thereby reducing the test cost; the filling column can be detachably installed on the upper side of the test box, which is convenient to replace and disassemble, and can be selected according to the size of the tube body, thereby being able to better control the volume of the detection channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0015] Figure 1 This is an appearance diagram of a pipeline steel H2S corrosion simulation test device of the present invention;

[0016] Figure 2 This is a cross-sectional view of a pipeline steel H2S corrosion simulation test device of the present invention;

[0017] Figure 3 A top view of a bottom clamp seat in a pipeline steel H2S corrosion simulation test device of the present invention;

[0018] Figure 4 This is a pipeline steel H2S corrosion simulation test device according to the present invention. Figure 2 A magnified view of the structure at A;

[0019] Figure 5 The present invention is a schematic diagram of the combined structure of a pipe body, a filling column and a clamping ring in a pipeline steel H2S corrosion simulation test device.

[0020] In the figure: 1. test box; 2. lifting base; 3. lifting mechanism; 4. bottom clamp seat; 5. top clamp seat; 6. tube body; 7. filling column; 8. guide tube; 9. detection tube; 101. opening; 102. box door; 103. transparent glass; 201. grid plate; 301. bidirectional screw rod; 302. slider; 303. inclined rod; 304. lifting handle; 401. pressure cylinder; 402. guide groove; 403. transmission ring; 404. gear ring; 405. gear column; 406. rack; 407. guide rod; 408. clamp plate; 409. clamping handle; 501. threaded groove; 502. clamping plate; 503. through groove; 701. cover plate; 702. hollow column; 703. ceramic cylinder; 704. handle; 705. support; 801. flow control valve. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0023] See also Figure 1-Figure 5 The present invention provides a technical solution: a pipeline steel H2S corrosion simulation test device, comprising a test box 1, a lifting base 2 is installed in the test box 1, a lifting mechanism 3 is installed between the lifting base 2 and the bottom wall of the test box 1, a bottom clamp seat 4 is fixedly connected to the upper side of the lifting base 2, a top clamp seat 5 is fixedly connected above the bottom clamp seat 4 and located on the top wall of the test box 1, a pipe body 6 is clamped and fixed between the bottom clamp seat 4 and the top clamp seat 5, a filling column 7 is installed inside the top clamp seat 5, a guide tube 8 and a detection tube 9 are provided on the outer wall of the test box 1, the filling column 7 comprises a support 705 arranged in the top clamp seat 5 and a core body arranged in the support 705 which slides up and down and cannot rotate, when the bottom end of the core body of the filling column 7 slides into the pipe body 6, a detection flow channel is formed between the guide tube 8, the detection tube 9 and the gap between the pipe body 6 and the core body of the filling column 7.

[0024] In an optional embodiment, a pressing cylinder 401 is fixedly embedded in the middle of the bottom clamp seat 4, and a plurality of guide grooves 402 are opened on the side wall of the pressing cylinder 401. A transmission ring 403 is fixedly connected to the edge of the bottom clamp seat 4. The transmission ring 403 has an annular inner cavity. A gear ring 404 is rotatably connected to the inner cavity wall of the transmission ring 403. The outer side of the gear ring 404 is meshed with a plurality of tooth columns 405. The two ends of the rotating shaft of the tooth column 405 are respectively rotatably embedded in the transmission. On the upper and lower walls of the inner cavity of the moving ring 403, the lower part of the tooth column 405 is meshedly connected with a rack 406, one end of the rack 406 is fixedly connected with a guide rod 407, the guide rod 407 is slidably embedded in the inner wall of the bottom clamp seat 4, and the end of the guide rod 407 extending out of the bottom clamp seat 4 is fixedly connected with a clamping plate 408, and a tube body 6 is clamped and fixed between several of the clamping plates 408, and the rotating axis of one of the tooth columns 405 passes through the bottom clamp seat 4 and is fixedly connected with a clamping handle 409.

[0025] It should be noted that, by rotating the clamping handle 409, the corresponding gear column 405 is driven to rotate, and the gear column 405 engages with the transmission gear ring 404, and the gear ring 404 engages with the remaining gear columns 405, so that each gear column 405 synchronously engages with the adjacent rack 406, which can push the rack 406 to slide, and then the guide rod 407 pushes the clamping plate 408 close to the tube body 6. In this way, the tube body 6 can be clamped and the tube body 6 can be automatically centered, which is suitable for experiments on tube bodies 6 of different diameters and lengths and has good versatility.

[0026] In an optional embodiment, thread grooves 501 are provided on the upper and lower end walls of the top clamp seat 5, and the thread groove 501 on the lower side is threadedly connected to a clamping plate 502, and the cross-section of the clamping plate 502 is a "convex" shaped structure, and a through groove 503 is provided in the middle of the clamping plate 502, and the size of the through groove 503 is larger than the size of the filling column 7 and smaller than the size of the tube body 6, and sealing rubber pads are bonded to the opposite sides of the clamping plate 502 and the bottom clamp seat 4.

[0027] It should be noted that the sizes of the clamping plate 502 and the filling column 7 are replaceable, wherein the filling column 7 can be detachably mounted on the upper side of the top wall of the test box 1, and the clamping plate 502 can be detachably mounted on the lower side of the top wall of the test box 1. The replacement and disassembly are convenient, and can be selected according to the size of the tube body 6, which can improve the accuracy and efficiency of the simulation experiment.

[0028] In an optional embodiment, the core body of the filling column 7 includes a cover plate 701, a hollow column 702 is fixedly connected to the lower side of the cover plate 701, a ceramic tube 703 is sleeved on the outer side of the hollow column 702, when the core body slides to the lowest position on the support 705, the bottom end surface of the ceramic tube 703 is arranged in contact with the pressure tube 401, the support 705 is threadedly connected to the upper thread groove 501, and a handle 704 is fixedly connected to the top wall of the cover plate 701.

[0029] It should be noted that oil or natural gas will flow along the gap between the ceramic tube 703 and the tube body 6. The thicker ceramic tube 703 can fill the part of the tube body 6 away from the side wall, which can reduce the loss of oil or natural gas. When corrosion occurs, the composition of oil or natural gas will change more obviously.

[0030] In an optional embodiment, the guide tube 8 is located above the detection tube 9 , one end of the guide tube 8 extends to the inside of the top clamp 5 , and one end of the detection tube 9 extends to the guide groove 402 .

[0031] It should be noted that the other end of the detection tube 9 cooperates with the external detection unit, so that the oil or natural gas can be completely discharged and collected from the detection tube 9 for reuse or purification, saving oil or natural gas and making it easier to grasp the quality of oil or natural gas.

[0032] In an optional embodiment, an opening 101 is provided at the upper front portion of the test box 1 , a box door 102 is hingedly connected to one side of the opening 101 , and a transparent glass 103 is fixedly embedded in the middle of the box door 102 .

[0033] It should be noted that the provision of the transparent glass 103 can facilitate the test personnel to observe the tube body 6 from the outside, and can also avoid the situation where a large amount of oil or natural gas leaks in an emergency.

[0034] In an optional embodiment, the lifting mechanism 3 includes a bidirectional screw rod 301, which is rotatably embedded between the inner walls of the test box 1 on both sides. The outer sides of both ends of the bidirectional screw rod 301 are threadedly connected with sliders 302. The sliders 302 are slidably connected to the bottom wall of the test box 1. The tops of the sliders 302 are hinged with inclined rods 303. The tops of the two inclined rods 303 are hinged to the bottom wall of the lifting base 2, and the two inclined rods 303 are arranged opposite to each other in an "eight" shape. One end of the bidirectional screw rod 301 passes through the test box 1 and is fixedly connected to a lifting handle 304.

[0035] It should be noted that rotating the lifting handle 304 can drive the bidirectional screw 301 to rotate, and the external threads at both ends of the bidirectional screw 301 drive the slider 302 to slide along the bottom wall of the test box 1, so that the distance between the two sliders 302 becomes shorter, which can squeeze the inclination angle of the inclined rod 303 to change, and the inclined rod 303 can push the lifting base 2 to rise.

[0036] In an optional embodiment, the lifting base 2 is designed as a hollow structure, a grid plate 201 is fixedly embedded in the lifting base 2, and the outer wall of the lifting base 2 is slidably connected to the inner wall of the test box 1.

[0037] It should be noted that the provision of the grid plate 201 can enhance the supporting capacity of the lifting platform 2 and can effectively reduce the load. When the lifting platform 2 moves up and down, the detection tube 9 moves up and down in the side groove, and the height of the tube body 6 can be easily adjusted.

[0038] Working principle: When the present invention is used, the lifting platform 2 is lowered to a low position, and the segmented tube body 6 is placed on the upper side of the bottom clamping seat 4 from the box door 102, and the clamping handle 409 is rotated to drive the corresponding tooth column 405 to rotate, and the tooth column 405 engages with the transmission gear ring 404, and the gear ring 404 engages with the remaining gear columns 405, so that each gear column 405 synchronously engages with the adjacent rack 406, which can push the rack 406 to slide, and then the guide rod 407 pushes the clamping plate 408 close to the tube body 6. In this way, the tube body 6 can be clamped. , and the tube body 6 can be automatically centered, the box door 102 is closed, and the lifting handle 304 is turned to drive the bidirectional screw rod 301 to rotate. The external threads at both ends of the bidirectional screw rod 301 drive the slider 302 to slide along the bottom wall of the test box 1, so that the distance between the two sliders 302 becomes shorter, which can squeeze the inclination angle of the inclined rod 303 to change. The inclined rod 303 can push the lifting base 2 to rise, so that the height of the tube body 6 is raised, and its top end can be pressed against the corresponding clamping plate 502. Under the action of the sealing rubber pad, the tube body 6 can be ensured to be After that, a filling column 7 of a suitable diameter is selected, and the handle 704 is held to align the ceramic tube 703 with the top clamp seat 5 and insert it. The handle 704 is rotated continuously to drive the cover plate 701 to be screwed into the upper thread groove 501 to achieve assembly sealing. During the test, the flow regulating valve 801 is opened to inject oil or natural gas into the top clamp seat 5. After filling the inner cavity of the top clamp seat 5, the oil or natural gas will flow along the gap between the ceramic tube 703 and the tube body 6. The coarser ceramic The ceramic cylinder 703 can fill the part of the pipe body 6 away from the side wall, which can reduce the loss of oil or natural gas. When corrosion occurs, the composition of oil or natural gas will change more obviously, and the ceramic cylinder 703 will not be corroded, which will not affect the test results of the simulation experiment. Adjusting the flow regulating valve 801 can control the flow rate of oil or natural gas, which can speed up the process of the simulation experiment. After the oil or natural gas flows to the pressure cylinder 401, it will be poured into the guide groove 402, and can flow out along the detection tube 9, and be detected by the external detection unit. After the corrosion is completed, the pipe body 6 can be disassembled to detect the corrosion condition in the pipe.

[0039] The core body is lifted above the tube body 6 without being separated from the support 705, so that the full-diameter flow channel simulation can be realized.

[0040] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A pipeline steel H2S corrosion simulation test device, comprising a test box (1), characterized in that: A lifting base (2) is installed in the test box (1), a lifting mechanism (3) is installed between the lifting base (2) and the bottom wall of the test box (1), a bottom clamping seat (4) is fixedly connected to the upper side of the lifting base (2), a top clamping seat (5) is fixedly connected above the bottom clamping seat (4) and located on the top wall of the test box (1), a tube body (6) is clamped and fixed between the bottom clamping seat (4) and the top clamping seat (5), a filling column (7) is installed inside the top clamping seat (5), and a guide tube (8) and a detection tube (9) are provided on the outer wall of the test box (1). 9), the filling column (7) comprises a support (705) arranged in the top clamping seat (5) and a core body arranged in the support (705) which slides up and down and cannot rotate. When the bottom end of the core body of the filling column (7) slides into the tube body (6), a detection flow channel is formed between the guide tube (8), the detection tube (9) and the gap between the tube body (6) and the core body of the filling column (7); the guide tube (8) is located above the detection tube (9), one end of the guide tube (8) extends to the inside of the top clamping seat (5), and one end of the detection tube (9) extends to the guide tube (8). The bottom clamp seat (4) is provided with a pressure tube (401) fixedly embedded in the middle part thereof, and a plurality of guide grooves (402) are provided on the side wall of the pressure tube (401). The edge of the bottom clamp seat (4) is fixedly connected with a transmission ring (403), and the transmission ring (403) has an annular inner cavity. A gear ring (404) is rotatably connected to the inner cavity wall of the transmission ring (403). The outer side of the gear ring (404) is meshedly connected with a plurality of gear columns (405), and the two ends of the rotating shaft of the gear column (405) are respectively rotatably embedded in the transmission ring (4 03) On the upper and lower walls of the inner cavity, the lower part of the tooth column (405) is meshedly connected with a rack (406), one end of the rack (406) is fixedly connected with a guide rod (407), the guide rod (407) is slidably embedded in the inner wall of the bottom clamp seat (4), and the end of the guide rod (407) extending out of the bottom clamp seat (4) is fixedly connected with a clamping plate (408), a tube body (6) is clamped and fixed between a plurality of the clamping plates (408), and the rotating axis of one of the tooth columns (405) passes through the bottom clamp seat (4) and is fixedly connected with a clamping handle (409).

2. A pipeline steel H2S corrosion simulation test device as claimed in claim 1, characterized in that: The upper and lower end walls of the top clamp seat (5) are both provided with thread grooves (501), the lower thread groove (501) is threadedly connected to a clamping plate (502), the cross section of the clamping plate (502) is in a "convex" shape, a through groove (503) is provided in the middle of the clamping plate (502), the size of the through groove (503) is larger than the size of the filling column (7) and smaller than the size of the tube body (6), and sealing rubber pads are bonded to the opposite sides of the clamping plate (502) and the bottom clamp seat (4).

3. A pipeline steel H2S corrosion simulation test device as claimed in claim 1, characterized in that: The core body of the filling column (7) comprises a cover plate (701), a hollow column (702) is fixedly connected to the lower side of the cover plate (701), a ceramic cylinder (703) is sleeved on the outer side of the hollow column (702), when the core body slides to the lowest position on the support (705), the bottom end surface of the ceramic cylinder (703) is arranged in contact with the pressure cylinder (401), the support (705) is threadedly connected to the upper thread groove (501), and a handle (704) is fixedly connected to the top wall of the cover plate (701).

4. A pipeline steel H2S corrosion simulation test device as claimed in claim 1, characterized in that: An opening (101) is provided at the upper front portion of the test box (1), a box door (102) is hingedly connected to one side of the opening (101), and a transparent glass (103) is fixedly embedded in the middle of the box door (102).

5. The pipeline steel H2S corrosion simulation test device according to claim 1, characterized in that: The lifting mechanism (3) comprises a bidirectional screw rod (301), the bidirectional screw rod (301) being rotatably embedded between the inner walls of both sides of the test box (1), the outer sides of both ends of the bidirectional screw rod (301) being threadedly connected to sliders (302), the sliders (302) being slidably connected to the bottom wall of the test box (1), the top ends of the sliders (302) being hinged to inclined rods (303), the top ends of the two inclined rods (303) being hinged to the bottom wall of the lifting base (2), and the two inclined rods (303) being arranged opposite to each other in an "eight" shape, and one end of the bidirectional screw rod (301) passing through the test box (1) and being fixedly connected to a lifting handle (304).

6. A pipeline steel H2S corrosion simulation test device as claimed in claim 1, characterized in that: The lifting base (2) is designed as a hollow structure, a grid plate (201) is fixedly embedded in the lifting base (2), and the outer wall of the lifting base (2) is slidably connected to the inner wall of the test box (1).

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