Fixing device for pipe section test piece

Abstract

The utility model provides a fixing device for a pipe section test piece, which comprises a bottom plate, at least one pair of fixing protection seats and at least one limiting component for limiting the pipe section test piece, the pair of fixing protection seats are mounted on the bottom plate, two ends of the limiting component are connected with the bottom plate, and the middle of the limiting component is positioned above the pair of fixing protection seats. And the pipe section test piece is flatly placed on the fixed protection seat and is limited and fixed through the limiting assembly. In the bonding prefabrication process and the testing process of the cathode disbonding test piece in a laboratory, a plurality of groups of heat-shrinkable tape (sleeve) repaired mouth pipe section test pieces are fixed and protected at the same time. The bonding prefabricated part is prevented from rolling over and falling off in the sealant curing process, the concentric bonding quality of the plastic cylinder and the pipe section test piece is effectively improved, the operation difficulty of detection personnel is greatly reduced, and the operation process of the detection personnel is simplified. The fixing device is convenient, efficient, stable, practical and suitable for multiple groups of heat-shrinkable tape (sleeve) repaired mouth pipe section test pieces in a laboratory.

Description

Technical Field

[0001] The utility model relates to the technical field of cathode stripping performance testing equipment, in particular to a fixing device for a pipe section test piece. Background Art

[0002] Cathodic disbonding test is a test method to evaluate the anti-stripping performance of heat shrinkable tape (sleeve) patching materials by simulating the actual working electrochemical environment in the laboratory. It is crucial to evaluate the quality and process of heat shrinkable tape (sleeve) patching. At present, the standards for cathodic disbonding test are mainly "GB / T 23257-2017 Appendix D", "SY / T 4113.3-2019", "ISO21809-1: 2018 Appendix H", "CSA Z245.21-2018 12.3", etc. The small-diameter (DN50~DN100) steel pipes commonly used in heat shrinkable tape (sleeve) patching test specimens usually use pipe section specimens, and the length of the pipe section is generally 100mm or 150mm. In the laboratory, when the test personnel conduct the cathodic disbonding test, they need to first use sealant to concentrically bond the plastic cylinder and the pipe section specimen to form a test groove with the outer arc surface of the pipe section specimen as the bottom. After the sealant is completely cured, add a 3% sodium chloride solution into the test tank, and then put the whole into a constant temperature device such as an electric blast drying oven, and conduct a 30-day long-term cathode stripping test at a high temperature of 50°C or 60°C. During the entire cycle, the test personnel need to frequently add distilled water to maintain the liquid level and adjust the test piece potential to -1.5V (relative to the saturated calomel electrode).

[0003] However, since the pipe section specimens themselves are prone to rolling, whether it is the prefabrication process of the heat shrink tape (sleeve) patched pipe section specimens or the cathodic stripping process of the heat shrink tape (sleeve) patched pipe section specimens in the constant temperature device, the fixing and protection of the pipe section specimens is a major problem that bothers laboratory testers. During the prefabrication process, before the sealant is completely cured (usually at least 24 hours of curing), once the pipe section specimen rolls and falls, it is difficult for the plastic cylinder to achieve concentric bonding with the pipe section specimen, which in turn affects the test results of the later tests; during the test process, when adding distilled water or adjusting the potential, if the test personnel accidentally knock over the pipe section specimen, the sodium chloride solution in the plastic cylinder above it will tip into the high-temperature electric blast drying oven, which is easy to cause safety accidents.

[0004] In order to prevent the pipe section specimens from rolling over, the test personnel in the laboratory currently use small square pads to fix the pipe section specimens from both sides of the bottom during the prefabrication stage and the constant temperature test stage. However, the fixation is not stable enough, and a large number of pipe section specimens are piled up in a messy manner, which is unsafe. The heat shrink tape (sleeve) patched pipe section specimens often roll over. In particular, when the cathode stripping test volume is large and multiple pipe section specimens are tested simultaneously in a constant temperature device such as an electric blast drying oven, the test personnel must place pads on each pipe section specimen one by one to fix it, which is cumbersome. At the same time, due to the space limitation of the electric blast drying oven, the placement of the pads is difficult to control, and the operation is very difficult. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a fixing device for a pipe section test piece in view of the deficiencies in the prior art.

[0006] The utility model provides a technical solution to the above-mentioned technical problem as follows: a fixing device for a pipe section specimen, comprising: a base plate, at least one pair of fixed protective seats, and at least one limiting assembly for limiting the pipe section specimen, wherein the pair of fixed protective seats are installed on the base plate, the two ends of the limiting assembly are connected to the base plate, and the middle part of the limiting assembly is located above the pair of fixed protective seats.

[0007] The beneficial effect of adopting the technical solution of the utility model is that the pipe section specimen is placed flat on the fixed protection seat, and then fixed by the limiting assembly. During the bonding prefabrication process and testing process of the laboratory cathode stripping specimen, it plays a role of fixing and protecting multiple groups of heat shrink tape (sleeve) patched pipe section specimens at the same time. It prevents the bonding prefabricated parts from tipping over and rolling off during the curing process of the sealant, effectively improves the quality of concentric bonding between the plastic cylinder and the pipe section specimen, greatly reduces the operating difficulty of the testers, and simplifies the operating procedures of the testers. It is convenient, efficient, stable and practical, and is suitable for fixing multiple groups of heat shrink tape (sleeve) patched pipe section specimens in the laboratory.

[0008] Furthermore, side plates are installed on the bottom plate, and both ends of the limiting assembly are connected to the side plates.

[0009] The beneficial effect of adopting the above further technical solution is: effectively preventing the sodium chloride solution from tipping into the constant temperature device running at high temperature during the cathode stripping test, thereby improving the safety of the cathode stripping test.

[0010] Furthermore, the side panels include: a pair of first protective side panels and a pair of second protective side panels, the pair of first protective side panels are installed one-to-one on both sides of the bottom panel, and the pair of second protective side panels are installed one-to-one on both ends of the bottom panel.

[0011] The beneficial effect of adopting the above-mentioned further technical solution is that the side plates are in a rectangular fence-like structure around the bottom plate, which can effectively prevent the pipe section specimen from accidentally rolling off the workbench and avoiding injuries; in addition, it can also prevent the sodium chloride solution in the plastic cylinder above the pipe section specimen from accidentally pouring into the electric blast drying box, eliminating safety hazards such as electric shock.

[0012] Furthermore, the pipe section specimen is a heat shrinkable tape patched pipe section specimen or a heat shrinkable sleeve patched pipe section specimen.

[0013] The beneficial effect of adopting the above further technical solution is that during the bonding prefabrication process and testing process of the laboratory cathodic disbonding specimen, multiple groups of heat shrinkable tape (sleeve) patched pipe section specimens are simultaneously fixed and protected. The device is convenient, efficient, stable and practical, and is suitable for fixing multiple groups of heat shrinkable tape (sleeve) patched pipe section specimens in the laboratory.

[0014] Furthermore, the limiting assembly includes: a pair of screw brackets, a limiting screw and a pair of locking nuts, the pair of screw brackets are installed one-to-one on both sides of the base plate, the two ends of the limiting screw pass through the pair of screw brackets one-to-one and are exposed on the outside, and the pair of locking nuts are installed one-to-one at the two ends of the pair of limiting screws.

[0015] The beneficial effect of adopting the above further technical solution is: the combination of the limit screw and the locking nut is conducive to improving the convenience of the inspection personnel. The limit screw runs parallel to the center of the pipe section specimen to be tested and coincides with the central axis of the fixed protection seat; finally, the two ends of the limit screw are fixed by the locking nut to further realize the all-round limit fixation of the pipe section specimen, effectively avoiding the accident of the prefabricated pipe section specimen accidentally rolling down.

[0016] Furthermore, a pair of screw brackets are each provided with a mounting hole at the top, and the diameter of the mounting hole is adapted to the diameter of the limiting screw.

[0017] The beneficial effect of adopting the above further technical solution is: a limiting screw is sequentially passed through the mounting hole of the screw bracket fixedly connected to a first protective side plate, a group of prefabricated pipe section specimens, and the mounting hole of the screw bracket on another first protective side plate. At this time, the limiting screw runs parallel to the center of the pipe section specimen to be tested and coincides with the central axis of the fixed protective seat; finally, the two ends of the limiting screw are fixed by locking nuts to further achieve all-round limiting fixation of the pipe section specimen, effectively avoiding the accident of accidental rolling of the prefabricated pipe section specimen.

[0018] Furthermore, the fixed protective seat is a rectangular parallelepiped, cube or cylindrical structure containing a cylindrical inner groove, and the arc surface of the cylindrical inner groove is adapted to the outer diameter of the pipe section specimen.

[0019] The beneficial effects of adopting the above further technical solution are: the rectangular, cube or cylindrical structure is relatively stable and is conducive to fixation. At the same time, the arc surface of the inner groove is adapted to the outer diameter of the pipe section specimen, which is conducive to achieving semi-wrapped fixation of the pipe section specimen and improving the stability of the placement of the pipe section specimen. At the same time, the choice of hollow or solid structure improves the processing suitability and is conducive to processing and production.

[0020] Furthermore, the axis of the limiting assembly and the axis of the pair of fixed protection seats are located on the same plane.

[0021] The beneficial effect of adopting the above further technical solution is that the fixed protection seats are arranged in pairs to match the number of test pieces in each group of pipe section test pieces, which is convenient for testers to load and unload and test the same sample at the same time. At the same time, each group of limit components and each pair of fixed protection seats are used in conjunction to form a full range of limit fixation for the pipe section test piece, further improving the stability of the placement of the pipe section test piece.

[0022] Furthermore, the base plate, the fixed protection seat and the limiting assembly are made of stainless steel.

[0023] The beneficial effects of adopting the above further technical solution are: the overall material is corrosion-resistant, stable and practical, and is conducive to processing and forming.

[0024] Furthermore, a pipe section specimen is installed on the fixed protective seat, the limiting assembly passes through the pipe section specimen, and a plastic cylinder is installed on the pipe section specimen.

[0025] The beneficial effect of adopting the above-mentioned further technical solution is that after the pipe section specimen is fixed, the inspector can easily bond the plastic cylinder concentrically to the pipe section specimen. During the sealant curing process (usually at least 24 hours of curing), the fixing device can effectively prevent the pipe section specimen from tipping over or rolling off the workbench, thereby improving the quality of the concentric bonding between the plastic cylinder and the pipe section specimen, greatly reducing the operating difficulty of the inspector and improving the safety of the test.

[0026] Advantages of additional aspects of the present invention will be partially given in the following description, and partially become apparent from the following description, or be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 One of the structural schematic diagrams of the fixing device of the pipe section specimen provided in the embodiment of the utility model.

[0028] Figure 2 The second structural schematic diagram of the fixing device of the pipe section specimen provided in the embodiment of the utility model.

[0029] Figure 3 A schematic structural diagram of a fixed protective seat provided in an embodiment of the utility model.

[0030] Explanation of the accompanying drawings: 1. Base plate; 2. Side plate; 3. Fixed protection seat; 4. Limiting assembly; 5. Pipe section specimen; 21. First protective side plate; 22. Second protective side plate; 41. Screw bracket; 42. Limiting screw; 43. Locking nut; 44. Mounting hole. DETAILED DESCRIPTION

[0031] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The embodiments given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0032] like Figures 1 to 3 As shown, an embodiment of the utility model provides a fixing device for a pipe section specimen, comprising: a base plate 1, at least one pair of fixed protection seats 3, and at least one limiting component 4 for limiting the pipe section specimen 5, wherein the pair of fixed protection seats 3 are installed on the base plate 1, both ends of the limiting component 4 are connected to the base plate 1, and the middle part of the limiting component 4 is located above the pair of fixed protection seats 3.

[0033] The beneficial effect of adopting the technical solution of the utility model is that the pipe section specimen is placed flat on the fixed protection seat, and then fixed by the limiting assembly. During the bonding prefabrication process and testing process of the laboratory cathode stripping specimen, it plays a role of fixing and protecting multiple groups of heat shrink tape (sleeve) patched pipe section specimens at the same time. It prevents the bonding prefabricated parts from tipping over and rolling off during the curing process of the sealant, effectively improves the quality of the concentric bonding of the plastic cylinder and the pipe section specimen 5, greatly reduces the operating difficulty of the testers, and simplifies the operating procedures of the testers. It is convenient, efficient, stable and practical, and is suitable for fixing multiple groups of heat shrink tape (sleeve) patched pipe section specimens in the laboratory.

[0034] like Figures 1 to 3 As shown, further, a side plate 2 is installed on the bottom plate 1 , and both ends of the limiting component 4 are connected to the side plate 2 .

[0035] The beneficial effect of adopting the above further technical solution is: effectively preventing the sodium chloride solution from tipping into the constant temperature device running at high temperature during the cathode stripping test, thereby improving the safety of the cathode stripping test.

[0036] like Figures 1 to 3 As shown, further, the side panel 2 includes: a pair of first protective side panels 21 and a pair of second protective side panels 22, the pair of first protective side panels 21 are installed one-to-one on both sides of the bottom plate 1, and the pair of second protective side panels 22 are installed one-to-one at both ends of the bottom plate 1.

[0037] The beneficial effect of adopting the above-mentioned further technical solution is that the side plates are in a rectangular fence-like structure around the bottom plate, which can effectively prevent the pipe section specimen from accidentally rolling off the workbench and avoiding injuries; in addition, it can also prevent the sodium chloride solution in the plastic cylinder above the pipe section specimen from accidentally pouring into the electric blast drying box, eliminating safety hazards such as electric shock.

[0038] like Figures 1 to 3 As shown, further, the pipe section specimen 5 is a heat shrinkable tape patched pipe section specimen or a heat shrinkable sleeve patched pipe section specimen.

[0039] The beneficial effect of adopting the above further technical solution is that during the bonding prefabrication process and testing process of the laboratory cathodic disbonding specimen, multiple groups of heat shrinkable tape (sleeve) patched pipe section specimens are simultaneously fixed and protected. The device is convenient, efficient, stable and practical, and is suitable for fixing multiple groups of heat shrinkable tape (sleeve) patched pipe section specimens in the laboratory.

[0040] like Figures 1 to 3 As shown, further, the limiting assembly 4 includes: a pair of screw brackets 41, a limiting screw 42 and a pair of locking nuts 43, the pair of screw brackets 41 are installed one-to-one on both sides of the base plate 1, the two ends of the limiting screw 42 pass through the pair of screw brackets 41 and are exposed on the outside, and the pair of locking nuts 43 are installed one-to-one at the two ends of the pair of limiting screws 42.

[0041] The beneficial effect of adopting the above further technical solution is: the combination of the limit screw and the locking nut is conducive to improving the convenience of the inspection personnel. The limit screw runs parallel to the center of the pipe section specimen to be tested and coincides with the central axis of the fixed protection seat; finally, the two ends of the limit screw are fixed by the locking nut to further realize the all-round limit fixation of the pipe section specimen, effectively avoiding the accident of the prefabricated pipe section specimen accidentally rolling down.

[0042] like Figures 1 to 3 As shown, further, a pair of the screw brackets 41 are each provided with a mounting hole 44 at the top, and the aperture of the mounting hole 44 is adapted to the diameter of the limiting screw 42 .

[0043] The beneficial effect of adopting the above further technical solution is: a limiting screw is sequentially passed through the mounting hole of the screw bracket fixedly connected to a first protective side plate, a group of prefabricated pipe section specimens, and the mounting hole of the screw bracket on another first protective side plate. At this time, the limiting screw runs parallel to the center of the pipe section specimen to be tested and coincides with the central axis of the fixed protective seat; finally, the two ends of the limiting screw are fixed by locking nuts to further achieve all-round limiting fixation of the pipe section specimen, effectively avoiding the accident of accidental rolling of the prefabricated pipe section specimen.

[0044] like Figures 1 to 3As shown, further, the fixed protection seat 3 is a rectangular parallelepiped, cube or cylindrical structure containing a cylindrical inner groove, and the arc surface of the cylindrical inner groove is adapted to the outer diameter of the pipe section specimen 5.

[0045] The beneficial effects of adopting the above further technical solution are: the rectangular, cube or cylindrical structure is relatively stable and is conducive to fixation. At the same time, the arc surface of the inner groove is adapted to the outer diameter of the pipe section specimen, which is conducive to achieving semi-wrapped fixation of the pipe section specimen and improving the stability of the placement of the pipe section specimen. At the same time, the choice of hollow or solid structure improves the processing suitability and is conducive to processing and production.

[0046] like Figures 1 to 3 As shown, further, the axis of the limiting component 4 and the axis of a pair of fixed protection seats 3 are located on the same plane.

[0047] The beneficial effect of adopting the above further technical solution is that the fixed protection seats are arranged in pairs to match the number of test pieces in each group of pipe section test pieces, which is convenient for testers to load and unload and test the same sample at the same time. At the same time, each group of limit components and each pair of fixed protection seats are used in conjunction to form a full range of limit fixation for the pipe section test piece, further improving the stability of the placement of the pipe section test piece.

[0048] like Figures 1 to 3 As shown, further, the base plate 1, the fixed protection seat 3, and the limiting component 4 are made of stainless steel.

[0049] The beneficial effects of adopting the above further technical solution are: the overall material is corrosion-resistant, stable and practical, and is conducive to processing and forming.

[0050] like Figures 1 to 3 As shown, further, a pipe section specimen 5 is installed on the fixed protection seat 3, the limiting assembly 4 passes through the pipe section specimen 5, and a plastic cylinder is installed on the pipe section specimen 5.

[0051] The beneficial effect of adopting the above-mentioned further technical solution is that after the pipe section specimen is fixed, the inspector can easily bond the plastic cylinder concentrically to the pipe section specimen. During the sealant curing process (usually at least 24 hours of curing), the fixing device can effectively prevent the pipe section specimen from tipping over or rolling off the workbench, thereby improving the quality of the concentric bonding between the plastic cylinder and the pipe section specimen, greatly reducing the operating difficulty of the inspector and improving the safety of the test.

[0052] In view of the deficiencies in the prior art, a fixing device (fixing device for pipe section specimens) is provided which is convenient and efficient to operate, stable and practical, and suitable for use in laboratories for fixing multiple groups of heat shrinkable tape (sleeve) patched pipe section specimens.

[0053] The fixing device for pipe section specimens provided in the embodiment of the utility model can be a fixing device for laboratory heat shrink tape (sleeve) patched pipe section specimens, including a base plate 1, four side plates 2, multiple pairs of fixing protection seats 3 and multiple groups of limiting components 4; the fixing device (fixing device for pipe section specimens) is a tray-like structure as a whole, the fixing protection seats 3 are fixedly installed in pairs on the upper surface of the base plate 1, the side plates 2 are fixedly installed around the base plate 1, and multiple groups of limiting components 4 are fixedly connected to the side plates 2, each group of limiting components 4 includes two screw brackets 41, a limiting screw 42 and two locking nuts 43, the multiple pairs of fixing protection seats 3 and the multiple groups of limiting components 4 correspond one to one, the pipe section specimen is placed flat on the fixing protection seats 3, and then is limited and fixed by the limiting components 4.

[0054] The beneficial effect of the utility model is that during the bonding prefabrication process and the testing process of the laboratory cathode disbonding specimen, multiple groups of heat shrinkable tape (sleeve) patched pipe section specimens are fixed and protected at the same time. The fixing device of the utility model can not only prevent the bonding prefabricated parts from rolling over during the curing process of the sealant, effectively improve the quality of the concentric bonding of the plastic cylinder and the pipe section specimen, greatly reduce the operating difficulty of the test personnel, simplify the operating procedures of the test personnel, but also effectively prevent the sodium chloride solution from tipping into the constant temperature device running at high temperature during the cathode disbonding test, thereby improving the safety of the cathode disbonding test.

[0055] On the basis of the above technical solution, the present invention can also be improved as follows.

[0056] like Figures 1 to 3 As shown, further, the side plate 2 is a rectangular fence-like structure, and the side plate 2 is formed by two first protective side plates 21 and two second protective side plates 22 that are alternately wound.

[0057] The beneficial effect of adopting the above further scheme is that the side plates are in a rectangular fence-like structure around the bottom plate, which can effectively prevent the pipe section specimen from accidentally rolling off the workbench and avoiding injuries; in addition, it can also prevent the sodium chloride solution in the plastic cylinder above the pipe section specimen from accidentally pouring into the electric blast drying box, eliminating safety hazards such as electric shock.

[0058] It should be noted that: in other embodiments, the structure of the fixed protection seat 3 can also be replaced by Figure 3 The rectangular parallelepiped structure shown contains a cylindrical internal groove, and the arc surface of the internal groove of the rectangular parallelepiped structure matches the outer diameter of the pipe section specimen.

[0059] Furthermore, the fixed protective seat 3 is a rectangular parallelepiped, cube or cylindrical structure with a cylindrical inner groove, and the arc surface of the inner groove is adapted to the outer diameter of the pipe section test piece. The fixed protective seat 3 can be hollow or solid inside.

[0060] The beneficial effects of adopting the above further scheme are: the rectangular parallelepiped, cube or cylindrical structure is relatively stable and is conducive to fixation. At the same time, the arc surface of the inner groove is adapted to the outer diameter of the pipe section specimen, which is conducive to achieving semi-wrapped fixation of the pipe section specimen and improving the stability of the placement of the pipe section specimen. At the same time, the choice of hollow or solid structure improves the processing suitability and is conducive to processing and production.

[0061] Furthermore, each pair of fixed protection seats 3 corresponds to each group of limiter components 4 one by one, and their axes coincide with each other.

[0062] Preferably, the fixed protection seats 3 are arranged in pairs, and each group of limiting components 4 coincides with the central axis of each pair of fixed protection seats 3 .

[0063] The beneficial effect of adopting the above further solution is that the fixed protection seats 3 are arranged in pairs to match the number of test pieces in each group of pipe section test pieces, which is convenient for testers to load and unload and test the same sample at the same time. At the same time, each group of limit components 4 and each pair of fixed protection seats 3 are used in conjunction to form a full range of limit fixation for the pipe section test piece, further improving the stability of the placement of the pipe section test piece.

[0064] Furthermore, the two screw brackets 41 in each group of the limiting assembly 4 are respectively fixedly connected to the two first protective side plates 21, and the upper end of the screw bracket 41 is provided with a mounting hole 44, and the aperture of the mounting hole 44 is adapted to the diameter of the limiting screw 42. The limiting screw 42 passes through the mounting holes 44 on the screw bracket 41 in sequence, and passes through the fixed protective seat 3 in parallel, and the two ends of the limiting screw 42 are installed or removed by locking nuts 43.

[0065] The beneficial effect of adopting the above further solution is that the cooperation of the limit screw 42 and the locking nut 43 is helpful to improve the convenience of operation of the inspection personnel.

[0066] Furthermore, the fixing device is made entirely of stainless steel.

[0067] The beneficial effects of adopting the above further solution are: the overall material is corrosion-resistant, stable and practical, and is conducive to processing and forming.

[0068] Scope of application: For the cathodic disbonding test in the testing laboratory, multiple groups of shrink band (sleeve) patched pipe section specimens can be fixed simultaneously during the specimen prefabrication and testing cycle.

[0069] The working process of the utility model is described below by an embodiment:

[0070] In the cathode disbonding test laboratory, during the prefabrication stage of the pipe section specimens, the test personnel place the fixture of the utility model flat on the workbench, and place the test specimens (usually 2 in each group) on the fixed protective seat 3 in turn. The arc surface of the inner groove of the fixed protective seat 3 is adapted to the outer diameter of the pipe section specimens, so as to ensure that the arc-shaped inner groove forms a semi-wrapped and safe fixation for the pipe section specimens; then, a limiting screw 42 is used to pass through the mounting hole 44 of the screw bracket 41 fixedly connected to a first protective side plate 21, a group of pipe section specimens to be prefabricated, and the mounting hole 44 of the screw bracket 41 on another first protective side plate 21 in turn. At this time, the limiting screw 42 runs parallel to the center of the group of pipe section specimens to be tested, and coincides with the central axis of the fixed protective seat 3; finally, the two ends of the limiting screw 42 are fixed by the locking nut 43, so as to further realize the all-round limiting fixation of the pipe section specimens, and effectively avoid the accident of accidental rolling of the prefabricated pipe section specimens.

[0071] After the pipe section specimen is fixed, the inspector can easily concentrically bond the plastic cylinder to the pipe section specimen. During the sealant curing process (usually at least 24 hours), this fixing device can effectively prevent the pipe section specimen from tipping over or rolling off the workbench, improve the quality of the concentric bonding between the plastic cylinder and the pipe section specimen, greatly reduce the operating difficulty of the inspector, and improve the safety of the test.

[0072] After the sealant is completely cured, the inspector can move the fixture together with the prefabricated multiple groups of pipe section specimens into the electric blast drying oven to smoothly carry out the subsequent cathode stripping test. The utility model directly omits the operations of placing the pipe section specimens one by one and fixing the small pads in the electric blast drying oven, simplifies the operating procedures of the inspector, and improves the work efficiency. In the subsequent long-term cathode stripping test, it can also effectively prevent the sodium chloride solution from tipping into the constant temperature device running at high temperature, further improving the safety of the cathode stripping test.

[0073] The utility model provides a fixing device which is convenient and efficient to operate, stable and practical, and suitable for multiple groups of heat shrink tape (sleeve) patched pipe section specimens. It has many advantages such as improving the quality of heat shrink tape (sleeve) patched prefabricated pipe section specimens and test safety, reducing the operating difficulty of testers, simplifying the operating procedures of testers, and improving the cleanliness and aesthetics of the laboratory. It provides safety guarantee and support for the smooth implementation of cathodic stripping test work in the testing laboratory.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A fixing device for a pipe section specimen, characterized in that: include: A base plate, at least one pair of fixed protective seats, and at least one limiting assembly for limiting the position of a pipe section specimen, wherein the pair of fixed protective seats are mounted on the base plate, the two ends of the limiting assembly are connected to the base plate, and the middle portion of the limiting assembly is located above the pair of fixed protective seats.

2. A fixing device for a pipe section specimen according to claim 1, characterized in that: The bottom plate is provided with side plates, and both ends of the limit assembly are connected to the side plates.

3. A fixing device for a pipe section specimen according to claim 2, characterized in that: The side panels include: a pair of first protective side panels and a pair of second protective side panels, the pair of first protective side panels are mounted on both sides of the bottom panel in a one-to-one correspondence, and the pair of second protective side panels are mounted on both ends of the bottom panel in a one-to-one correspondence.

4. A fixing device for a pipe section specimen according to claim 1, characterized in that: The pipe section specimen is a heat shrinkable tape patched pipe section specimen or a heat shrinkable sleeve patched pipe section specimen.

5. A fixing device for a pipe section specimen according to claim 1, characterized in that: The limiting assembly includes: a pair of screw brackets, a limiting screw and a pair of locking nuts. The pair of screw brackets are installed one-to-one on both sides of the base plate, and the two ends of the limiting screw pass through the pair of screw brackets and are exposed to the outside. The pair of locking nuts are installed one-to-one at the two ends of the pair of limiting screws.

6. A fixing device for a pipe section specimen according to claim 5, characterized in that: A pair of screw brackets are each provided with a mounting hole at the top, and the diameter of the mounting hole is adapted to the diameter of the limiting screw.

7. A fixing device for a pipe section specimen according to claim 1, characterized in that: The fixed protective seat is a rectangular parallelepiped, cube or cylindrical structure containing a cylindrical inner groove, and the arc surface of the cylindrical inner groove is adapted to the outer diameter of the pipe section specimen.

8. A fixing device for a pipe section specimen according to claim 1, characterized in that: The axis of the limiting assembly and the axis of the pair of fixed protection seats are located on the same plane.

9. A fixing device for a pipe section specimen according to claim 1, characterized in that: The base plate, the fixed protection seat and the limiting assembly are made of stainless steel.

10. A fixing device for a pipe section specimen according to claim 1, characterized in that: A pipe section test piece is installed on the fixed protection seat, the limiting component passes through the pipe section test piece, and a plastic cylinder is installed on the pipe section test piece.

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