A cathodic protection system test auxiliary device

Abstract

The invention relates to the technical field of cathodic protection, in particular to a cathodic protection system test auxiliary device, comprising a surface laying strip, a plurality of connecting pipes are fixedly connected to the bottom of the surface laying strip, an upper half ring is fixedly connected to the bottom of the connecting pipe, a plurality of first circular holes are opened on the surface laying strip, and a second circular hole is opened on the upper half ring; the invention makes two arc surface frames approach each other by cooperating with the action of a clamping mechanism, thereby clamping and fixing one end of a silver chloride reference electrode, and transporting one end of the silver chloride reference electrode to the surface of a metal pipe and contacting the surface of the metal pipe, thereby performing a natural potential test on the cathodic protection system on the metal pipe, omitting the deep excavation process of the soil before the test, reducing the preparation work before the test, and improving the test efficiency of the cathodic protection system.

Description

Technical Field

[0001] The invention relates to the technical field of cathodic protection, and in particular to a cathodic protection system testing auxiliary device. Background Art

[0002] Cathodic protection technology is a type of electrochemical protection technology. Its principle is to apply an external current to the surface of the corroded metal structure, and the protected structure becomes the cathode, thereby inhibiting the electron migration caused by metal corrosion and avoiding or weakening the occurrence of corrosion.

[0003] The patent document with publication number CN117452027A discloses an auxiliary structure and operation steps of a cathodic protection system test device, which belongs to the technical field of cathodic protection system test devices, including a mounting platform, a lifting mechanism is arranged under the mounting platform, the lifting mechanism includes four movable rods and four fixed rods, the movable rods are respectively fixedly installed at the four corners of the lower surface of the mounting platform, the movable rods are movably sleeved in the fixed rods, a driving mechanism is arranged under the mounting platform, the driving mechanism includes a driving motor, and a control panel is fixedly installed on the front side of the mounting platform.

[0004] In the prior art, when testing the cathodic protection system, it is necessary to test the natural potential of the cathodic protection system to ensure that the cathodic protection system operates normally and effectively protects the metal structure. During the test, a silver chloride reference electrode needs to be placed on the surface of the metal structure, and then a potentiometer is connected to the reference electrode and the silver rod. When testing a metal pipeline buried in the field and contacting the silver chloride reference electrode, it is necessary to dig deep into the soil and expose the metal pipeline body. In addition, when performing multi-point measurements on the surface of the metal pipeline, it is necessary to determine the buried orientation of the metal pipeline multiple times, which increases the preparation work before the test and affects the test efficiency of the cathodic protection system. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a cathodic protection system testing auxiliary device.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is: a cathodic protection system test auxiliary device, including a surface laying strip, a plurality of connecting pipes are fixedly connected to the bottom of the surface laying strip, the bottom of the connecting pipes are fixedly connected to the upper half ring, a plurality of first circular holes are opened on the surface laying strip, a second circular hole is opened on the upper half ring, the first circular hole and the second circular hole are respectively connected to the corresponding connecting pipe, a lower half ring is arranged below the upper half ring, and a positioning mechanism is connected between the upper half ring and the lower half ring;

[0007] A shielding cover is provided on the top of each of the first circular holes, and a U-shaped bar is provided inside each of the connecting tubes. The top of the U-shaped bar is fixedly connected to the bottom of the corresponding shielding cover, and two arc frames are provided at the bottom of the U-shaped bar. The bottom ends of the arc frames are located inside the corresponding second circular holes and are flush with the inner wall of the upper half ring. A vertical moving mechanism is connected to the U-shaped bar, and a matching clamping mechanism is connected between two adjacent arc frames. A limiting mechanism is connected to the shielding cover.

[0008] Preferably, the vertical moving mechanism includes two first bar frames, the two first bar frames are fixedly connected to the inner wall of the connecting tube along the circumferential direction, the bottom ends of the first bar frames are slidably connected to the second bar frames, the bottom ends of the second bar frames are slidably connected to the sliding blocks, the U-shaped bar is fixedly connected between the two sliding blocks, the second bar frames are fixedly connected to the first circular columns, the sliding blocks are slidably inserted into the corresponding first circular columns, the first circular columns are sleeved with a first spring, and the two ends of the first spring are respectively fixedly connected to the top of the sliding block and the top surface of the second bar frame.

[0009] Preferably, the mating clamping mechanism includes two movable grooves, which are respectively opened at the two ends of the bottom of the U-shaped strip, and the center positions of the movable grooves are fixedly connected with connecting plates, and the two ends of the top of the arc frame are fixedly connected with sliding plates, and the sliding plates are respectively located in the corresponding movable grooves and in contact with the corresponding connecting plates, and the two sides of the connecting plates are fixedly connected with second circular columns, and the sliding plates are respectively slidably inserted into the corresponding second circular columns, and the second circular columns are sleeved with a second spring, and the two ends of the second spring are respectively fixedly connected to the corresponding sliding plates and the side of the movable groove away from the connecting plate, and the two sides of the arc frame are rotatably connected with rollers, and the upper parts of the two sides of the second strip frame are fixedly connected with guide separation strips, and the bottom ends of the guide separation strips are provided with guiding inclined surfaces.

[0010] Preferably, a mounting plate is provided above one side of the first bar frame, and two first limit pins are slidably inserted on the mounting plate, and the first limit pins are fixedly connected to the first bar frame, and a third spring is sleeved on the first limit pin, and the two ends of the third spring are respectively fixedly connected to the mounting plate and the end of the first limit pin away from the first bar frame, and an arc pin is fixedly inserted on the mounting plate, and the arc end of the arc pin passes through the first bar frame and extends to the interior of the first bar frame, a positioning hole is provided on one side of the second bar frame, and a guiding slope is provided on the top of the second bar frame.

[0011] Preferably, the positioning mechanism includes two first positioning plates and two second positioning plates, the two first positioning plates are respectively fixedly connected to the two ends of the upper half ring, the two second positioning plates are respectively fixedly connected to the two ends of the lower half ring, and the corresponding first positioning plates and the second positioning plates are threadedly connected with limiting bolts.

[0012] Preferably, the limiting mechanism includes a rotating ring and two arc-shaped bars, the rotating ring is rotatably connected to the top of the surface laying strip, the shielding cover is located inside the rotating ring, the two arc-shaped bars are fixedly connected to the side surfaces of the shielding cover along the circumferential direction, the top of the rotating ring is fixedly connected to two arc-shaped shells along the circumferential direction, the arc-shaped bars are respectively located inside the corresponding arc-shaped shells, a placement groove is opened on the top of the shielding cover, and a pull ring is rotatably connected inside the placement groove.

[0013] Preferably, a plurality of annular grooves are provided on the top of the surface paving strip, and the annular grooves are respectively connected with the corresponding first circular holes, and a connecting ring is fixedly connected to the inside of the annular groove, and a movable ring is provided on the top surface of the annular groove, and the movable ring is located above the connecting ring, and a plurality of second limit pins are fixedly connected to the bottom of the movable ring along the circumferential direction, and the second limit pins are slidably inserted on the corresponding connecting rings, and the second limit pins are sleeved with a fourth spring, and the fourth spring is fixedly connected between the corresponding connecting ring and the movable ring.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The two arc-surface frames are moved away from each other by cooperating with the clamping mechanism, and one end of the silver chloride reference electrode is placed between the two arc-surface frames, and the end of the silver chloride reference electrode is located below the two arc-surface frames. Then, the shielding cover is moved downward and returned to the initial position, so that the U-shaped bar drives the two arc-surface frames to move downward, and the two arc-surface frames are brought close to each other by cooperating with the clamping mechanism to clamp and fix one end of the silver chloride reference electrode. When the shielding cover returns to the initial position, the two arc-surface frames transport one end of the silver chloride reference electrode to the surface of the metal pipe and contact the surface of the metal pipe, so as to perform a natural potential test on the cathodic protection system on the metal pipe, and the deep excavation process of the soil before the test is omitted, the preparation work before the test is reduced, and the test efficiency of the cathodic protection system is improved.

[0016] 2. The sliding block continues to move upward along the inside of the second strip frame, so that the bottom end of the U-shaped strip can move to the corresponding first circular hole, which is convenient for installing and placing the silver chloride reference electrode. When the two arc-surface frames clamp and fix one end of the silver chloride reference electrode and drive the end to move downward and contact the surface of the metal pipe, the elastic compression of the first spring makes way for the protruding position of the end of the silver chloride reference electrode between the arc-surface frame and the metal pipe.

[0017] 3. When the shielding cover drives the U-shaped bar to move vertically downward, the two arc-surface frames clamp one end of the silver chloride reference electrode, so that the silver chloride reference electrode wire moves vertically downward along the inside of the corresponding connecting pipe until the end of the silver chloride reference electrode contacts the metal pipe, thereby completing the contact and conduction between the silver chloride reference electrode and the metal pipe.

[0018] 4. The second strip frame continues to squeeze the arc surface end of the arc surface pin through the inner wall of the positioning hole, so that the arc surface end of the arc surface pin continues to move to make way, thereby releasing the limiting effect of the arc surface pin on the second strip frame, so that in the process of the U-shaped bar driving the two arc surface frames to move downward, the sliding block preferentially moves downward inside the second strip frame and enables the two arc surface frames to clamp and limit one end of the silver chloride reference electrode. Only then can the second strip frame move downward inside the first strip frame, so that the process of the two arc surface frames clamping one end of the silver chloride reference electrode can be operated at the first circular hole, thereby increasing the scope of manual intervention and ensuring that the two arc surface frames effectively clamp and fix one end of the silver chloride reference electrode. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 For the present invention Figure 1 A schematic diagram of the structure enlargement at point A;

[0021] Figure 3 For the present invention Figure 1 A schematic diagram of the structure at B in FIG.

[0022] Figure 4 It is a schematic diagram of a partial cross-sectional structure of the present invention (the surface laying strip and the connecting pipe on one side, the upper half ring and the lower half ring are cut);

[0023] Figure 5 For the present invention Figure 4 A schematic diagram of the structure at position C in FIG.

[0024] Figure 6 For the present invention Figure 4 A schematic diagram of the structure at D in FIG.

[0025] Figure 7 It is a schematic diagram of the first matching structure of the U-shaped strip, the arc surface frame and the first strip frame of the present invention;

[0026] Figure 8 For the present invention Figure 7 A schematic diagram of the structure at position E in FIG.

[0027] Fig. 9 For the present invention Figure 7 A magnified schematic diagram of the structure at F in FIG.

[0028] Fig.10 It is a schematic diagram of the second matching structure of the U-shaped strip, the arc surface frame and the first strip frame of the present invention;

[0029] Fig.11 For the present invention Fig.10 A schematic diagram of the structure at G in FIG.

[0030] Fig.12 It is a schematic diagram of the cooperation structure of the first strip frame, the second strip frame and the sliding block of the present invention (the second strip frame and the sliding block are both in a state of moving upward);

[0031] Fig.13 For the present invention Fig.12 Schematic diagram of the enlarged structure at H in FIG.

[0032] In the figure: 1, ground laying strip; 2, connecting pipe; 3, upper half ring; 4, first circular hole; 5, second circular hole; 6, lower half ring; 7, shielding cover plate; 8, U-shaped strip; 9, arc surface frame; 10, first strip frame; 11, second strip frame; 12, sliding block; 13, first circular column; 14, first spring; 15, movable groove; 16, connecting plate; 17, sliding plate; 18, second circular column; 19, second spring; 20, Roller; 21. Guide separation strip; 22. Mounting plate; 23. First limit pin; 24. Third spring; 25. Arc pin; 26. Positioning hole; 27. First positioning plate; 28. Second positioning plate; 29. ​​Limit bolt; 30. Rotating ring; 31. Arc strip; 32. Arc shell; 33. Placement groove; 34. Pull ring; 35. Annular groove; 36. Connecting ring; 37. Movable ring; 38. Second limit pin; 39. Fourth spring. DETAILED DESCRIPTION

[0033] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0034] like Figures 1 to 13The cathodic protection system test auxiliary device shown in the figure comprises a surface laying strip 1, a plurality of connecting pipes 2 are fixedly connected to the bottom of the surface laying strip 1, an upper half ring 3 is fixedly connected to the bottom of each connecting pipe 2, and a plurality of first circular holes 4 (such as Figure 6 As shown in FIG. 1 ), the upper half ring 3 is provided with a second circular hole 5 (as shown in FIG. Figure 5 As shown), the first circular hole 4 and the second circular hole 5 are respectively connected to the corresponding connecting pipe 2, a lower semi-ring 6 is arranged below the upper semi-ring 3, and a positioning mechanism is connected between the upper semi-ring 3 and the lower semi-ring 6;

[0035] The top of each of the first circular holes 4 is provided with a shielding cover plate 7, and the interior of each of the connecting pipes 2 is provided with a U-shaped bar 8, the top of the U-shaped bar 8 is fixedly connected to the bottom of the corresponding shielding cover plate 7 (such as Figure 7As shown in the figure, two arc frames 9 are arranged at the bottom of the U-shaped bar 8, the bottom ends of the arc frames 9 are located inside the corresponding second circular holes 5, and are flush with the inner wall of the upper semi-ring 3, a vertical moving mechanism is connected to the U-shaped bar 8, a matching clamping mechanism is connected between two adjacent arc frames 9, and a limiting mechanism is connected to the shielding cover plate 7; when working, the prior art needs to test the natural potential of the cathodic protection system when testing the cathodic protection system to ensure the normal operation of the cathodic protection system and to effectively protect the metal structure. During the test, a silver chloride reference electrode needs to be placed on the surface of the metal structure, and then a potentiometer is connected to the reference electrode and the silver rod. When testing the cathodic protection system buried in the field, a silver chloride reference electrode needs to be placed on the surface of the metal structure, and then a potentiometer is connected to the reference electrode and the silver rod. When the metal pipe is tested and in contact with the silver chloride reference electrode, it is necessary to dig deep into the soil and expose the metal pipe body, and when multi-point measurement is performed on the surface of the metal pipe, it is necessary to determine the buried position of the metal pipe for many times, which increases the preparation work before the test and affects the test efficiency of the cathodic protection system. The technical solution can solve the above problems, and the specific working method is as follows: during the installation and laying of the metal pipe, the corresponding upper half ring 3 and the lower half ring 6 are fixedly sleeved on the surface of the metal pipe through the action of the positioning mechanism, and then the connecting pipe 2 is buried in the soil through subsequent soil burial, and the surface laying strip 1 is located on the surface of the soil, so that the upper half ring 3 and the lower half ring 6 are used. The metal pipe is fixedly sleeved so that the surface laying strip 1 and the metal pipe are parallel to each other, which is convenient for determining the buried orientation of the metal pipe. When the natural potential test is performed on the cathodic protection system, the limiting effect of the limiting mechanism on the shielding cover plate 7 is released, and then the shielding cover plate 7 is moved upward, so that the U-shaped strip 8 moves vertically upward inside the connecting pipe 2 through the action of the vertical moving mechanism, and drives the two arc-surface frames 9 at the bottom to move upward synchronously, so that the two arc-surface frames 9 move to the corresponding first circular hole 4, and the two arc-surface frames 9 are moved away from each other by the action of the clamping mechanism, and then one end of the silver chloride reference electrode is placed between the two arc-surface frames 9, and the silver chloride reference electrode is moved upward. The end is located below between the two arc-surface frames 9, and then the shielding cover plate 7 is moved downward and returned to the initial position, so that the U-shaped bar 8 drives the two arc-surface frames 9 to move downward, and the two arc-surface frames 9 are brought close to each other by cooperating with the clamping mechanism to clamp and fix one end of the silver chloride reference electrode. When the shielding cover plate 7 returns to the initial position, the two arc-surface frames 9 transport one end of the silver chloride reference electrode to the surface of the metal pipe and contact the surface of the metal pipe, thereby performing a natural potential test on the cathodic protection system on the metal pipe, and omitting the deep excavation process of the soil before the test, reducing the preparation work before the test, and improving the test efficiency of the cathodic protection system.

[0036] As a further embodiment of the present invention, the vertical moving mechanism comprises two first strip frames 10 (such as Fig.10As shown in the figure, the two first strip frames 10 are fixedly connected to the inner wall of the connecting pipe 2 along the circumferential direction, the bottom ends of the first strip frames 10 are slidably connected to the second strip frames 11, the bottom ends of the second strip frames 11 are slidably connected to the sliding blocks 12, the U-shaped strips 8 are fixedly connected between the two sliding blocks 12, the inside of the second strip frames 11 are fixedly connected to the first circular columns 13, the sliding blocks 12 are slidably inserted into the corresponding first circular columns 13, the first circular columns 13 are sleeved with first springs 14, the two ends of the first springs 14 are respectively fixedly connected to the top of the sliding blocks 12 and the top surface of the second strip frames 11; when working, the shielding cover 7 moves upward and drives the U-shaped strips 8 to move upward, the U-shaped strips 8 drive the sliding blocks 12 on both sides to move upward synchronously, and drive the second strip frames 11 through the elastic stretching action of the first springs 14. Move upward along the inside of the first strip frame 10. When the second strip frame 11 moves to the top of the inside of the first strip frame 10, the shielding cover plate 7 is continuously moved upward, so that the U-shaped bar 8 drives the sliding blocks 12 on both sides to continue to move upward along the sliding joint of the first circular column 13, thereby squeezing the corresponding first spring 14 to produce compression deformation, and the sliding block 12 is continuously moved upward along the inside of the second strip frame 11, so that the bottom end of the U-shaped bar 8 can be moved to the corresponding first circular hole 4, which is convenient for installing and placing the silver chloride reference electrode. When the two arc-surface frames 9 clamp and fix one end of the silver chloride reference electrode and drive the end to move downward and contact the surface of the metal pipe, the first spring 14 is elastically compressed to make way for the protruding position of the end of the silver chloride reference electrode between the arc-surface frame 9 and the metal pipe.

[0037] As a further embodiment of the present invention, the cooperating clamping mechanism includes two movable grooves 15, which are respectively opened at the two ends of the bottom of the U-shaped bar 8, and the center position of the movable groove 15 is fixedly connected to a connecting plate 16, and the two ends of the top of the arc frame 9 are fixedly connected to a sliding plate 17, and the sliding plates 17 are respectively located in the corresponding movable grooves 15 and contact the corresponding connecting plates 16. The two sides of the connecting plate 16 are fixedly connected to a second circular column 18, and the sliding plates 17 are respectively slidably inserted on the corresponding second circular columns 18. The second circular column 18 is sleeved with a second spring 19, and the two ends of the second spring 19 are respectively fixedly connected to the corresponding sliding plate 17 and the side of the movable groove 15 away from the connecting plate 16, and the two sides of the arc frame 9 are rotatably connected to rollers 20, and the upper sides of the second strip frame 11 are fixedly connected to guide separation strips 21 (such as Fig.11As shown in the figure, a guiding inclined surface is provided at the bottom end of the guiding separation strip 21; during operation, when the second strip frame 11 moves to the top end inside the first strip frame 10, by continuing to move the shielding cover plate 7 upward, the U-shaped strip 8 drives the sliding blocks 12 on both sides to continue to move upward along the sliding insertion of the first circular column 13, and after the two arc-surface frames 9 at the bottom of the U-shaped strip 8 move to above the first circular hole 4, the rollers 20 on both sides of the arc-surface frames 9 are respectively located at the bottom of the corresponding guiding separation strip 21, and in the process of the arc-surface frames 9 continuing to move upward, the guiding inclined surface at the bottom of the guiding separation strip 21 and the rollers 20 are contacted and squeezed, so that the two arc-surface frames 9 move away from each other, so that the sliding plate 17 moves on the corresponding second circular column 18 and squeezes the second spring 19 to produce compression deformation, Then, one end of the silver chloride reference electrode is placed between the two arc-surface frames 9, and during the downward movement of the two arc-surface frames 9, one end of the silver chloride reference electrode is controlled to move downward synchronously until the roller 20 loses the limiting guidance of the guide separation strip 21, and the two arc-surface frames 9 clamp and limit one end of the silver chloride reference electrode through the elastic stretching action of the second spring 19, thereby completing the positioning of the silver chloride reference electrode. When the shielding cover 7 drives the U-shaped bar 8 to move vertically downward, the two arc-surface frames 9 clamp one end of the silver chloride reference electrode, so that the silver chloride reference electrode wire moves vertically downward along the corresponding connecting tube 2 until the end of the silver chloride reference electrode contacts the metal pipe, thereby completing the contact and conduction between the silver chloride reference electrode and the metal pipe.

[0038] As a further embodiment of the present invention, a mounting plate 22 is disposed above one side of the first strip frame 10, and two first stop pins 23 (such as Fig. 9 As shown in the figure, the first limiting pins 23 are fixedly connected to the first strip frame 10, and the first limiting pins 23 are sleeved with a third spring 24. The two ends of the third spring 24 are respectively fixedly connected to the mounting plate 22 and the end of the first limiting pin 23 away from the first strip frame 10. The mounting plate 22 is fixedly inserted with an arc surface pin 25. The arc surface end of the arc surface pin 25 passes through the first strip frame 10 and extends to the inside of the first strip frame 10 (as shown in the figure). Fig.13As shown in the figure, a positioning hole 26 is provided on one side of the second strip frame 11, and a guiding inclined surface is provided on the top of the second strip frame 11; when working, when the second strip frame 11 moves upward along the inside of the first strip frame 10, the guiding inclined surface at the top of the second strip frame 11 and the end of the arc pin 25 located inside the first strip frame 10 are contacted and squeezed, so that the arc pin 25 moves to make way, and drives the mounting plate 22 to move at the sliding insertion position of the first limit pin 23, thereby squeezing the third spring 24 to produce compression deformation, and when the second strip frame 11 moves to the first strip frame 10, the third spring 24 is compressed and deformed. When the arc surface pin 25 is at the top of the frame 10, the arc surface end of the arc surface pin 25 faces the positioning hole 26 on one side of the second strip frame 11, and moves into the positioning hole 26 under the elastic extension of the third spring 24 and contacts one side of the sliding block 12. When the sliding block 12 moves upward along the second strip frame 11, the arc surface end of the arc surface pin 25 loses the obstruction of the sliding block 12 and continues to move along the positioning hole 26 toward the inside of the second strip frame 11 through the elastic extension of the third spring 24, so that the arc surface end of the arc surface pin 25 is located in the second strip frame 11, thereby In the process of driving the two arc-surface frames 9 to move downward and clamp the silver chloride reference electrode, the arc-surface pin 25 is located in the positioning hole 26 to position the second strip frame 11, and the vertical movement of the second strip frame 11 is limited. When the sliding block 12 moves downward along the inside of the second strip frame 11 and squeezes the arc-surface end of the arc-surface pin 25 into the positioning hole 26, the second strip frame 11 continues to squeeze the arc-surface end of the arc-surface pin 25 through the inner wall of the positioning hole 26, so that the arc-surface end of the arc-surface pin 25 continues to move to make way, thereby releasing the arc-surface pin 25 from the second strip frame. Due to the limiting effect of the frame 11, during the process that the U-shaped bar 8 drives the two arc-surface frames 9 to move downward, the sliding block 12 moves downward preferentially inside the second strip frame 11 and enables the two arc-surface frames 9 to clamp and limit one end of the silver chloride reference electrode. Only then can the second strip frame 11 move downward inside the first strip frame 10, so that the process of the two arc-surface frames 9 clamping one end of the silver chloride reference electrode can be operated at the first circular hole 4, thereby increasing the scope of manual intervention and ensuring that the two arc-surface frames 9 effectively clamp and fix one end of the silver chloride reference electrode.

[0039] As a further implementation scheme of the present invention, the positioning mechanism includes two first positioning plates 27 and two second positioning plates 28. The two first positioning plates 27 are respectively fixedly connected to the two ends of the upper half ring 3, and the two second positioning plates 28 are respectively fixedly connected to the two ends of the lower half ring 6. The corresponding first positioning plates 27 and second positioning plates 28 are threadedly connected with limiting bolts 29. When working, the first positioning plates 27 and the second positioning plates 28 are threadedly fixed by the limiting bolts 29, so that the upper half ring 3 and the lower half ring 6 are contacted and fixed, and the upper half ring 3 and the lower half ring 6 are fixedly sleeved on the metal pipe.

[0040] As a further embodiment of the present invention, the limiting mechanism includes a rotating ring 30 and two arcuate bars 31. The rotating ring 30 is rotatably connected to the top of the surface laying strip 1. The shielding cover plate 7 is located inside the rotating ring 30. The two arcuate bars 31 are fixedly connected to the side of the shielding cover plate 7 along the circumferential direction. The top of the rotating ring 30 is fixedly connected to two arcuate shells 32 along the circumferential direction. The arcuate bars 31 are respectively located inside the corresponding arcuate shells 32. A placement groove 33 is opened on the top of the shielding cover plate 7. A pull ring 34 is rotatably connected inside the placement groove 33. During operation, the rotating ring 30 is rotated unidirectionally so that the two arc-shaped shells 32 rotate synchronously with the rotating ring 30, so that the arc-shaped bar 31 is disengaged from the inside of the arc-shaped shell 32, thereby releasing the limiting effect on the shielding cover 7. After the pull ring 34 is rotated from the inside of the placement groove 33 and is in a vertical state, the pull ring 34 is used to vertically pull the shielding cover 7. When the shielding cover 7 returns to the initial position, the rotating ring 30 is rotated to make the arc-shaped bar 31 re-positioned inside the arc-shaped shell 32, thereby limiting the shielding cover 7.

[0041] As a further implementation scheme of the present invention, a plurality of annular grooves 35 are provided on the top of the surface paving strip 1, and the annular grooves 35 are respectively connected to the corresponding first circular holes 4, and a connecting ring 36 is fixedly connected to the inside of the annular groove 35, and a movable ring 37 is provided on the top surface of the annular groove 35, and the movable ring 37 is located above the connecting ring 36, and a plurality of second limiting pins 38 are fixedly connected to the bottom of the movable ring 37 along the circumferential direction, and the second limiting pins 38 are all slidably inserted on the corresponding connecting ring 36, and the second limiting pins 38 are all sleeved with fourth springs 39, and the fourth springs 39 are fixedly connected between the corresponding connecting ring 36 and the movable ring 37; when working, by providing the movable ring 37 on the top surface of the annular groove 35, and by the elastic expansion of the fourth spring 39, the movable ring 37 is The bottom of the shielding cover 7 is shielded by the expansion effect to reduce the entry of mud and rainwater into the connecting pipe 2. When the end of the silver chloride reference electrode enters the connecting pipe 2 and contacts and conducts with the metal pipe, the silver chloride reference electrode wire between the movable ring 37 and the shielding cover 7 moves downward through the movable ring 37 to make way after the shielding cover 7 is limited, thereby reducing the squeezing of the silver chloride reference electrode wire. When the movable ring 37 moves downward, the fourth spring 39 produces a compression deformation. When the test is completed, the silver chloride reference electrode wire is lost between the shielding cover 7 and the movable ring 37, and the movable ring 37 returns to its initial position under the elastic expansion action of the fourth spring 39, filling the gap between the shielding cover 7 and the movable ring 37.

[0042] Working principle of the present invention:

[0043] During the installation and laying of the metal pipe, the corresponding upper half ring 3 and lower half ring 6 are fixedly sleeved on the surface of the metal pipe by the action of the positioning mechanism, and then the connecting pipe 2 is buried in the soil through subsequent soil burial, and the surface laying strip 1 is located on the surface of the soil, so that the upper half ring 3 and the lower half ring 6 are used to fix the metal pipe, so that the surface laying strip 1 and the metal pipe are parallel to each other, which is convenient for determining the buried orientation of the metal pipe. When the cathodic protection system is tested for natural potential, the limiting effect of the limiting mechanism on the shielding cover plate 7 is released, and then the shielding cover plate 7 is moved upward, so that the U-shaped strip 8 is moved vertically upward inside the connecting pipe 2 by the action of the vertical moving mechanism, and the two arc frames 9 at the bottom are driven to move upward synchronously, so that the two arc frames 9 are moved to the corresponding first circular holes 4, and the clamping mechanism is cooperated with to move the two arc frames 9 upward. The two arc-surface frames 9 are moved away from each other, and one end of the silver chloride reference electrode is placed between the two arc-surface frames 9, and the end of the silver chloride reference electrode is located below the two arc-surface frames 9. Then, the shielding cover 7 is moved downward and returned to the initial position, so that the U-shaped bar 8 drives the two arc-surface frames 9 to move downward, and the two arc-surface frames 9 are brought close to each other by cooperating with the clamping mechanism to clamp and fix one end of the silver chloride reference electrode. When the shielding cover 7 returns to the initial position, the two arc-surface frames 9 transport one end of the silver chloride reference electrode to the surface of the metal pipe and contact the surface of the metal pipe, so as to perform a natural potential test on the cathodic protection system on the metal pipe, and the deep excavation process of the soil before the test is omitted, the preparation work before the test is reduced, and the test efficiency of the cathodic protection system is improved.

[0044] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may have various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention to be protected, and the scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A cathodic protection system test auxiliary device, comprising a surface laying strip (1), characterized in that: A plurality of connecting pipes (2) are fixedly connected to the bottom of the surface paving strip (1), and an upper half ring (3) is fixedly connected to the bottom of each connecting pipe (2). A plurality of first circular holes (4) are provided on the surface paving strip (1), and a second circular hole (5) is provided on each upper half ring (3). The first circular hole (4) and the second circular hole (5) are respectively connected to the corresponding connecting pipe (2). A lower half ring (6) is provided below each upper half ring (3), and a positioning mechanism is connected between the upper half ring (3) and the lower half ring (6); The top of each of the first circular holes (4) is provided with a shielding cover plate (7), the interior of each of the connecting pipes (2) is provided with a U-shaped bar (8), the top of each of the U-shaped bars (8) is fixedly connected to the bottom of the corresponding shielding cover plate (7), the bottom of each of the U-shaped bars (8) is provided with two arc-surface frames (9), the bottom ends of each of the arc-surface frames (9) are located inside the corresponding second circular holes (5) and are flush with the inner wall of the upper half ring (3), a vertical moving mechanism is connected to the U-shaped bar (8), a matching clamping mechanism is connected between two adjacent arc-surface frames (9), and a limiting mechanism is connected to the shielding cover plate (7); The vertical movement mechanism comprises two first bar frames (10), the two first bar frames (10) are fixedly connected to the inner wall of the connecting pipe (2) along the circumferential direction, the bottom ends of the first bar frames (10) are slidably connected to the second bar frames (11), the bottom ends of the second bar frames (11) are slidably connected to the sliding blocks (12), the U-shaped bar (8) is fixedly connected between the two sliding blocks (12), the inside of the second bar frames (11) are fixedly connected to the first circular columns (13), the sliding blocks (12) are slidably inserted on the corresponding first circular columns (13), the first circular columns (13) are sleeved with first springs (14), and the two ends of the first springs (14) are respectively fixedly connected to the top of the sliding blocks (12) and the top surface of the inside of the second bar frames (11); The matching clamping mechanism comprises two movable grooves (15), the two movable grooves (15) are respectively arranged at the two ends of the bottom of the U-shaped strip (8), the center of the movable groove (15) is fixedly connected with a connecting plate (16), the two ends of the top of the arc surface frame (9) are fixedly connected with a sliding plate (17), the sliding plate (17) is respectively located inside the corresponding movable groove (15) and is in contact with the corresponding connecting plate (16), the two sides of the connecting plate (16) are fixedly connected with a second circular column (18), and the sliding plate ( 17) are respectively slidably inserted on the corresponding second circular column (18), the second circular column (18) is sleeved with a second spring (19), the two ends of the second spring (19) are respectively fixedly connected to the corresponding sliding plate (17) and the side of the movable groove (15) away from the connecting plate (16), the two sides of the arc frame (9) are rotatably connected with rollers (20), the upper parts of the two sides of the second strip frame (11) are fixedly connected with guide separation strips (21), and the bottom end of the guide separation strip (21) is provided with a guiding inclined surface.

2. A cathodic protection system test auxiliary device according to claim 1, characterized in that: A mounting plate (22) is arranged above one side of the first strip frame (10), and two first limit pins (23) are slidably inserted on the mounting plate (22), and the first limit pins (23) are fixedly connected to the first strip frame (10), and a third spring (24) is sleeved on the first limit pin (23), and the two ends of the third spring (24) are respectively fixedly connected to the mounting plate (22) and one end of the first limit pin (23) away from the first strip frame (10), and an arc surface pin (25) is fixedly inserted on the mounting plate (22), and the arc surface end of the arc surface pin (25) passes through the first strip frame (10) and extends to the inside of the first strip frame (10), and a positioning hole (26) is provided on one side of the second strip frame (11), and a guiding inclined surface is provided on the top of the second strip frame (11).

3. A cathodic protection system test auxiliary device according to claim 1, characterized in that: The positioning mechanism comprises two first positioning plates (27) and two second positioning plates (28), the two first positioning plates (27) being fixedly connected to the two ends of the upper half ring (3), respectively, and the two second positioning plates (28) being fixedly connected to the two ends of the lower half ring (6), respectively, and limiting bolts (29) being threadedly connected between the corresponding first positioning plates (27) and the second positioning plates (28).

4. A cathodic protection system test auxiliary device according to claim 1, characterized in that: The limiting mechanism comprises a rotating ring (30) and two arcuate strips (31); the rotating ring (30) is rotatably connected to the top of the surface laying strip (1); the shielding cover plate (7) is located inside the rotating ring (30); the two arcuate strips (31) are circumferentially fixedly connected to the side of the shielding cover plate (7); the top of the rotating ring (30) is circumferentially fixedly connected to two arcuate shells (32); the arcuate strips (31) are respectively located inside the corresponding arcuate shells (32); a placement groove (33) is provided on the top of the shielding cover plate (7); a pull ring (34) is rotatably connected inside the placement groove (33).

5. A cathodic protection system test auxiliary device according to claim 4, characterized in that: A plurality of annular grooves (35) are provided on the top of the surface paving strip (1), and the annular grooves (35) are respectively connected to the corresponding first circular holes (4); a connecting ring (36) is fixedly connected inside the annular groove (35); a movable ring (37) is provided on the top surface inside the annular groove (35); the movable ring (37) is located above the connecting ring (36); a plurality of second limit pins (38) are fixedly connected to the bottom of the movable ring (37) along the circumferential direction; the second limit pins (38) are slidably inserted on the corresponding connecting ring (36); a fourth spring (39) is sleeved on the second limit pins (38); the fourth spring (39) is fixedly connected between the corresponding connecting ring (36) and the movable ring (37).

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