Polarization probe for cathode protection

Abstract

The utility model relates to the technical field of polarized probes, in particular to a polarized probe for cathode protection. According to the technical scheme, the device comprises a cylinder body and further comprises a test piece box rotationally installed on the cylinder body, a polarization test piece and an installation hole formed in the polarization test piece are installed in the test piece box in a sliding mode, and a plurality of expansion rods and a driving mechanism are installed in the installation hole in a sliding mode; the driving mechanism drives the polarized test piece to move towards the outer side of the test piece box and drives the plurality of expansion rods to extend towards the outer side of the polarized test piece. By increasing the contact area of the polarized test piece and the soil, the measurement accuracy is improved, and the influence of holes on the test result is reduced. By increasing the fastening force of the polarized test piece on the soil near the polarized test piece, the condition that the soil settles to form holes can be reduced, so that the polarized test piece can be in good contact with the soil, and the measurement accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of polarization probes, in particular to a polarization probe for cathode protection. Background Art

[0002] Cathodic protection polarization probe is a device used to monitor and evaluate the cathodic protection effect of metal structures. Cathodic protection is a technology that slows down or stops metal corrosion by applying an external current to make the surface of the metal structure the cathode of an electrochemical cell. In the cathodic protection system, the polarization probe plays a vital role. The polarization probe can monitor the corrosion rate of the metal structure in real time and evaluate the corrosion state by measuring electrochemical parameters (such as potential and current density).

[0003] The polarization probe needs to be buried in the soil, and it is necessary to ensure that the polarization test piece maintains good contact with the soil. This is because the measurement accuracy of the polarization probe depends largely on the contact quality with the soil.

[0004] Holes are easily formed in sandy soils. The moisture content in the soil changes with climatic conditions (such as drought or rainfall), which may cause changes in the soil structure and the formation of holes. Biological activity in the soil, such as root growth or microbial activity, may form holes around the probe. These holes may cause the polarization test piece to lose good contact with the soil, resulting in reduced measurement accuracy. Utility Model Content

[0005] The utility model aims to solve the problems existing in the background technology and proposes a polarization probe for cathodic protection which can increase the contact area between the polarization test piece and the soil and reduce the influence of holes on the measurement results.

[0006] The technical solution of the utility model is: a polarization probe for cathodic protection, comprising a cylinder body, and also comprising:

[0007] A test piece box is rotatably mounted on the barrel, wherein a polarization test piece is slidably mounted in the test piece box, and the polarization test piece passes through the bottom of the test piece box and extends to the outside of the test piece box;

[0008] A mounting hole is provided in the polarization test piece, wherein a plurality of expansion rods are slidably installed in the mounting hole, and the expansion rods penetrate one side of the polarization test piece and extend to the outside of the polarization test piece;

[0009] The driving mechanism includes a driving assembly installed in the test strip box and a transmission assembly installed in the mounting hole, the transmission assembly is connected to the expansion rod, and the driving mechanism drives the polarization test strip to move to the outside of the test strip box and drives multiple expansion rods to extend to the outside of the polarization test strip.

[0010] Optionally, the transmission assembly includes a transmission rod slidably installed in the mounting hole, a plurality of connecting plates fixedly installed on the transmission rod, and a plurality of connecting rods rotatably installed on the connecting plates, and the plurality of connecting rods correspond one-to-one to the plurality of expansion rods and are rotatably connected.

[0011] Optionally, the transmission rod passes through one side of the polarization test piece and extends to the outside of the polarization test piece, a driving disk is fixedly mounted on the transmission rod, the driving disk is located on the outside of the polarization test piece, a plurality of first springs are fixedly mounted on the polarization test piece, and the other end of the first spring is fixedly connected to the driving disk.

[0012] Optionally, the driving mechanism includes an internal threaded rod fixedly installed in the barrel, a screw rod threadedly connected to the internal threaded rod, the screw rod is slidably connected to the test strip box and circumferentially positioned, a pressure plate is fixedly installed on the screw rod, and the pressure plate is fixedly connected to the driving disk.

[0013] Optionally, a slide groove is provided in the pressure plate, a card block is slidably installed in the slide groove, a second spring is fixedly installed on the card block, the other end of the second spring is fixedly connected to the inner wall of the slide groove, a card groove is provided on the test strip box, a reset rod is slidably installed on the test strip box, and the reset rod is connected to the card groove.

[0014] Optionally, a limit plate is fixedly mounted on the polarization test piece, a pressure ring is fixedly mounted on the limit plate, and a groove is provided on the test piece box.

[0015] Optionally, a limit block is fixedly mounted on the polarization test piece, and the limit block is located between the driving disk and the polarization test piece.

[0016] Optionally, a wire is fixedly mounted on the barrel.

[0017] Compared with the prior art, the utility model has the following beneficial technical effects:

[0018] The utility model extends the polarization test piece to the outside of the test piece box, thereby increasing the area where the polarization test piece can contact the soil, improving the measurement accuracy, and reducing the influence of holes on the test results. By extending the expansion rod to the outside of the polarization test piece;

[0019] The fastening force of the polarization test piece to the soil near the polarization test piece can be further increased, and the formation of holes in the soil caused by soil settlement can be reduced, so that the polarization test piece and the soil can maintain good contact, thereby improving the accuracy of the measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A structural schematic diagram of an embodiment of the utility model is given;

[0021] Figure 2Provide an internal cross-sectional view of the utility model;

[0022] Figure 3 Provide the utility model Figure 2 A partial picture of the center A;

[0023] Figure 4 Provide the utility model Figure 2 A partial view of point B in the middle;

[0024] Figure 5 Provide the utility model Figure 2 A partial view of point C in the middle.

[0025] Figure numerals: 1, barrel; 101, wire; 2, test piece box; 3, polarization test piece; 301, mounting hole; 302, transmission rod; 303, expansion rod; 304, connecting piece; 305, connecting rod; 306, driving disk; 307, first spring; 4, internal threaded rod; 401, screw rod; 402, pressure plate; 5, limit plate; 6, pressure ring; 601, groove; 7, slide groove; 701, second spring; 702, block; 703, slot; 704, reset rod; 8, limit block. DETAILED DESCRIPTION

[0026] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] Example

[0028] like Figure 1 As shown, a polarization probe for cathodic protection proposed by the utility model comprises a cylinder body 1 on which a conductor 101 is fixedly mounted.

[0029] In this embodiment, refer to Figure 3 The polarization probe also includes a test piece box 2 rotatably mounted on the barrel 1, a polarization test piece 3 is slidably mounted in the test piece box 2, and the polarization test piece 3 passes through the bottom of the test piece box 2 and extends to the outside of the test piece box 2. A mounting hole 301 is provided in the polarization test piece 3, and a plurality of expansion rods 303 are slidably mounted in the mounting hole 301, and the expansion rods 303 pass through one side of the polarization test piece 3 and extend to the outside of the polarization test piece 3. By extending the expansion rods 303 to the outside of the polarization test piece 3, the fastening force of the polarization test piece 3 to the soil near the polarization test piece can be increased, and the situation of soil settlement and formation of holes can be reduced.

[0030] Furthermore, the polarization probe also includes a driving mechanism, which includes a driving assembly installed in the test strip box 2 and a transmission assembly installed in the mounting hole 301, the transmission assembly is connected to the expansion rod 303, and the driving mechanism drives the polarization test strip 3 to move toward the outside of the test strip box 2 and drives multiple expansion rods 303 to extend toward the outside of the polarization test strip 3.

[0031] and in Figure 3 In the embodiment, the transmission assembly includes a transmission rod 302 slidably mounted in the mounting hole 301, a plurality of connecting pieces 304 fixedly mounted on the transmission rod 302, and a plurality of connecting rods 305 rotatably mounted on the connecting piece 304, wherein the plurality of connecting rods 305 correspond to and are rotatably connected with the plurality of expansion rods 303 one by one. The transmission rod 302 passes through one side of the polarization test piece 3 and extends to the outside of the polarization test piece 3. A driving disk 306 is fixedly mounted on the transmission rod 302, and the driving disk 306 is located on the outside of the polarization test piece 3. A plurality of first springs 307 are fixedly mounted on the polarization test piece 3, and the other end of the first spring 307 is fixedly connected to the driving disk 306. When the driving disk 306 moves downward, the polarization test piece 3 is driven downward by the elastic force of the first spring 307, so that the polarization test piece 3 can be extended to the outside of the test piece box 2, thereby increasing the area in which the polarization test piece 3 can contact the soil, improving the accuracy of the measurement, and reducing the influence of the hole on the test result. A limit plate 5 is fixedly mounted on the polarization test strip 3. When the polarization test strip 3 moves to the limit position, that is, the limit plate 5 contacts the bottom of the test strip box 2. The driving disc 306 continues to move downward to compress the first spring 307, so that the gap between the driving disc 306 and the polarization test strip 3 is reduced. Thereby driving the transmission rod 302 to move downward. A pressure ring 6 is fixedly mounted on the limit plate 5, and a groove 601 is provided on the test strip box 2. At this time, the pressure ring 6 is combined with the groove 601 to improve the sealing performance of the test strip box 2. A limit block 8 is fixedly mounted on the polarization test strip 3, and the limit block 8 is located between the drive disc 306 and the polarization test strip 3. The limit block 8 prevents excessive compression of the first spring 307 and prevents damage to the first spring 307. The downward movement of the transmission rod 302 will drive the connecting plate 304 to move downward, and then drive the connecting rod 305 to swing. The expansion rod 303 can be extended to the outside of the polarization test piece 3 through the transmission of the connecting rod 305 .

[0032] Furthermore, if Figure 2 , wherein the driving mechanism further comprises an internal threaded rod 4 fixedly mounted in the barrel 1, a screw rod 401 connected in the internal threaded rod 4 in the threaded part, the screw rod 401 is slidably connected to the test strip box 2 and is circumferentially positioned, a pressing plate 402 is fixedly mounted on the screw rod 401, and the pressing plate 402 is fixedly connected to the driving disk 306. The barrel 1 is rotated to make the barrel 1 and the test strip box 2 rotate relative to each other, which can drive the screw rod 401 and the internal threaded rod 4 to rotate relative to each other, thereby making the screw rod 401 drive the pressing plate 402 to move downward, thereby driving the driving disk 306 to move downward.

[0033] See also Figure 4 , Figure 5As shown, a slide groove 7 is provided inside the pressing plate 402, a block 702 is slidably installed in the slide groove 7, a second spring 701 is fixedly installed on the block 702, and the other end of the second spring 701 is fixedly connected to the inner wall of the slide groove 7, a slot 703 is provided on the test strip box 2, a reset rod 704 is slidably installed on the test strip box 2, and the reset rod 704 is connected to the slot 703. The downward movement of the pressing plate 402 will drive the block 702 to move downward, and the second spring 701 applies elastic force to the block 702, so that the block 702 is against the test strip box 2. When the block 702 and the slot 703 are in a coaxial position, the block 702 will be driven into the slot 703 under the action of the second spring 701. Thereby, the pressing plate 402 is limited to prevent the polarized test strip 3 from moving up and down. When the polarized test strip 3 needs to be moved, the reset rod 704 can be pressed to move the block 702 out of the slot 703.

[0034] Working principle: Rotate the barrel 1 to make the barrel 1 and the test strip box 2 rotate relative to each other, so that the screw rod 401 drives the pressure plate 402 to move downward, and then drives the driving disk 306 to move downward. The polarization test strip 3 is driven downward by the elastic force of the first spring 307, so that the polarization test strip 3 can be extended to the outside of the test strip box 2, thereby increasing the area of ​​the polarization test strip 3 that can contact the soil, improving the accuracy of the measurement, and reducing the impact of the holes on the test results. When the polarization test strip 3 moves to the extreme position, the downward movement of the transmission rod 302 will drive the connecting piece 304 to move downward, and then drive the connecting rod 305 to swing. The expansion rod 303 can be extended to the outside of the polarization test strip 3 through the transmission of the connecting rod 305. The tightening force of the polarization test strip 3 on the soil near the polarization test strip can be increased, and the situation of soil settlement and formation of holes can be reduced.

[0035] The above-mentioned specific embodiments are only several optional embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A polarization probe for cathodic protection, comprising a barrel (1), characterized in that: Also includes: A test strip box (2) is rotatably mounted on the barrel (1), wherein a polarization test strip (3) is slidably mounted in the test strip box (2), and the polarization test strip (3) passes through the bottom of the test strip box (2) and extends to the outside of the test strip box (2); A mounting hole (301) is provided in the polarization test piece (3), wherein a plurality of expansion rods (303) are slidably mounted in the mounting hole (301), and the expansion rods (303) penetrate one side of the polarization test piece (3) and extend to the outside of the polarization test piece (3); A driving mechanism, the driving mechanism comprising a driving assembly installed in the test strip box (2) and a transmission assembly installed in the mounting hole (301), the transmission assembly being connected to the expansion rod (303), the driving mechanism driving the polarization test strip (3) to move toward the outside of the test strip box (2) and driving the plurality of expansion rods (303) to extend toward the outside of the polarization test strip (3).

2. A polarization probe for cathodic protection according to claim 1, characterized in that: The transmission assembly comprises a transmission rod (302) slidably mounted in the mounting hole (301), a plurality of connecting plates (304) fixedly mounted on the transmission rod (302), and a plurality of connecting rods (305) rotatably mounted on the connecting plates (304); the plurality of connecting rods (305) correspond one to one with the plurality of expansion rods (303) and are rotatably connected.

3. A polarization probe for cathodic protection according to claim 2, characterized in that: The transmission rod (302) passes through one side of the polarization test strip (3) and extends to the outside of the polarization test strip (3); a driving disk (306) is fixedly mounted on the transmission rod (302); the driving disk (306) is located on the outside of the polarization test strip (3); a plurality of first springs (307) are fixedly mounted on the polarization test strip (3); the other end of the first spring (307) is fixedly connected to the driving disk (306).

4. A polarization probe for cathodic protection according to claim 3, characterized in that: The driving mechanism comprises an internally threaded rod (4) fixedly mounted in the barrel (1), and a screw rod (401) threadedly connected to the internally threaded rod (4); the screw rod (401) is slidably connected to the test piece box (2) and is circumferentially positioned; a pressure plate (402) is fixedly mounted on the screw rod (401), and the pressure plate (402) is fixedly connected to the driving disk (306).

5. A polarization probe for cathodic protection according to claim 4, characterized in that: The pressing plate (402) is provided with a slide groove (7), a clamping block (702) is slidably installed in the slide groove (7), a second spring (701) is fixedly installed on the clamping block (702), and the other end of the second spring (701) is fixedly connected to the inner wall of the slide groove (7), the test strip box (2) is provided with a clamping groove (703), and a reset rod (704) is slidably installed on the test strip box (2), and the reset rod (704) is connected to the clamping groove (703).

6. A polarization probe for cathodic protection according to claim 5, characterized in that: A limit plate (5) is fixedly mounted on the polarization test piece (3), a pressure ring (6) is fixedly mounted on the limit plate (5), and a groove (601) is provided on the test piece box (2).

7. A polarization probe for cathodic protection according to claim 6, characterized in that: A limit block (8) is fixedly mounted on the polarization test piece (3), and the limit block (8) is located between the driving disk (306) and the polarization test piece (3).

8. A polarization probe for cathodic protection according to claim 1, characterized in that: A conductive wire (101) is fixedly mounted on the barrel body (1).

Images