Resistivity monitoring equipment

Abstract

A resistivity monitoring device disclosed by the present invention comprises a resistivity detector, the resistivity detector is provided with a plurality of plugging ports and a plurality of winders, the winders and the plugging ports are in one-to-one correspondence, a first connecting line is wound in each winder, and the tail end of the first connecting line is electrically connected with the tail end of a second connecting line arranged outside the winder; the head end of the first connecting line is provided with a connector used for being connected with an electrode, and the head end of the second connecting line is provided with a plug-in end capable of being matched with the plug-in port in a plug-in mode. The resistivity monitoring equipment provided by the invention is provided with the connector, the push-and-pull seat is moved to drive the electric clamp arranged in the outer shell to move up and down, in the process of moving the electric clamp up and down, the electric clamp can be opened and closed by means of movement of the guide column in the sliding groove, the electric clamp does not need to be pinched open or closed in a manual contact mode, the electric shock risk is reduced, and the safety is improved. And a winder is arranged in the device, so that the first connecting wire can automatically return into the winder, and manual withdrawing is not needed.

Description

Technical Field

[0001] The invention belongs to the technical field of mine water inrush rescue and relief, relates to a detection device, and specifically relates to a resistivity monitoring device. Background Art

[0002] Resistivity detection plays an important role in industrial production, environmental protection, resource management, etc. Real-time detection and control of resistivity can effectively improve production efficiency, ensure product quality, prevent equipment damage and optimize resource utilization. In coal mining, as the depth of coal mining continues to deepen, the water control pressure faced by the working face is also increasing. In order to ensure the safety of personnel and equipment in the working area, accurate detection of resistivity data during the mining process of the working face becomes extremely important.

[0003] At present, when performing resistivity detection, the resistivity monitoring device is placed in a suitable position, then the electrode is placed at the position to be tested, and then one end of the long wire is inserted into the plug interface of the resistivity monitoring device, and then the other end is clamped on the electrode at the position to be tested. During the above operation, the long wires are placed on the ground in a relatively scattered manner, and there are multiple groups of wires, which is not conducive to the collection and arrangement of the wires in the later stage, and it is not convenient to carry and use multiple groups of wires. In addition, it is necessary to use and properly store the electrode clip correctly to avoid wear of the electrode clip. The existing electrode clip is connected to the wire. During use and subsequent storage, it is difficult to effectively protect the electrode clip, and when performing the clamping work, a manual contact electrode clip is required, which has the hidden danger of electric shock and urgently needs improvement. Summary of the invention

[0004] In view of the defects and shortcomings in the prior art, the present invention provides a resistivity monitoring device to solve the technical problems in the prior art that the resistivity detection device for working face mining is inconvenient to carry and use and the electrode clamp is easily worn.

[0005] To achieve the above object, the present invention adopts the following technical scheme:

[0006] A resistivity monitoring device includes a resistivity detector, which is provided with a plurality of plug interfaces and a plurality of reels, the reels corresponding to the plug interfaces one by one, a first connecting wire wound inside each reel, the tail end of the first connecting wire being electrically connected to the tail end of a second connecting wire arranged outside the reel; the head end of the first connecting wire is provided with a connector for connecting an electrode, and the head end of the second connecting wire is provided with a plug end capable of plugging and cooperating with the plug interface.

[0007] The present invention also has the following technical features:

[0008] Specifically, the connector includes an outer shell, which includes a front panel, a back panel, a bottom panel, a first side panel and a second side panel; a first slide groove is vertically arranged on the upper side of the back panel, a push-pull seat is slidably connected in the first slide groove, an electric clamp is arranged on the push-pull seat, and the electric clamp is connected to a first connecting line passing through the outer shell; a retractable support rod is hinged on the first side wall and the second side wall, and the support rod is also connected to the push-pull seat.

[0009] Furthermore, two second slide grooves are arranged on both sides of the first slide groove in a mirror-symmetrical manner; the electric clamp includes two clamping plates hinged on the push-pull seat, each clamping plate is provided with a guide column, and the guide column can move along the second slide groove under the drive of the push-pull seat to realize the opening and closing of the electric clamp.

[0010] Furthermore, the second slide groove includes a first inclined groove, a straight groove and a second inclined groove connected from bottom to top; the distance between the center line of the first inclined groove and the center line of the first slide groove gradually decreases from bottom to top, and the distance between the center line of the second inclined groove and the center line of the first slide groove gradually increases from bottom to top.

[0011] Furthermore, the top of the outer shell is also movably connected with a first top plate and a second top plate, and the first top plate and the second top plate are respectively connected to the push-pull seat via a transmission rod, and the transmission rod can move under the drive of the push-pull seat to achieve the connection and separation of the first top plate and the second top plate.

[0012] Furthermore, a push-pull seat handle is also provided at the front end of the push-pull seat, and the push-pull seat handle passes through the outer shell through a push-pull groove opened on the front plate. A slider is provided at the rear end of the push-pull seat, and the slider is slidably connected to the first slide groove.

[0013] Furthermore, the reel includes an outer cylinder body, and a reel coaxially rotatably disposed in the outer cylinder body, the reel being wound with the first connecting wire; the head end of the first connecting wire passes through the first through hole provided on the outer cylinder body and out of the reel, the tail end of the first connecting wire passes through the first through hole provided on the reel and enters the reel, and is electrically connected to a conductive slip ring penetrating into the reel; the conductive slip ring is electrically connected to the tail end of the second connecting wire disposed outside the reel;

[0014] A coil spring is also provided in the outer cylinder body, and the coil spring is connected to the rotating shaft of the winding drum. The coil spring can be tightened when the head end of the first connecting line moves away from the outer cylinder body, and can drive the rotating shaft to rotate through the restoring force, so that the first connecting line is wound onto the winding drum.

[0015] Furthermore, the conductive slip ring includes an outer ring fixedly connected to the inner side wall of the fixing seat, and an inner ring coaxially rotatably sleeved inside the outer ring, the inner ring is inserted into the winding drum through a first mounting hole provided on the outer cylinder body and a second mounting hole provided on the winding drum, and the first mounting hole and the second mounting hole are coaxially connected with equal diameters.

[0016] Furthermore, the support rod includes a connecting portion, a rod body is coaxially connected to the connecting portion, a movable cavity is arranged in the rod body, and a first connecting block, a guide block and a second connecting block are arranged in sequence from bottom to top in the movable cavity, the bottom end of the first connecting block is connected to the top end of the connecting portion, the top end of the first connecting block is connected to the bottom end of the guide block, a guide groove is axially opened in the second connecting block, the upper part of the guide block is inserted into the guide groove, and a support spring is also sleeved on the outside of the guide block, the top end of the support spring is in contact with the bottom surface of the second connecting block, and the bottom end of the support spring is in contact with the top surface of the first connecting block.

[0017] Compared with the prior art, the present invention has the following technical effects:

[0018] (1) The resistivity monitoring device provided by the present invention is provided with a connector, which drives the electric clamp arranged in the outer shell to move up and down by moving the push-pull seat. During the process of the electric clamp moving up and down, the electric clamp can be opened and closed with the help of the movement of the guide column in the slide groove. There is no need for manual contact to pinch the electric clamp open or close, thereby reducing the risk of electric shock and improving safety performance.

[0019] (2) The device of the present invention supports the push-pull seat by means of a retractable support rod disposed in the outer shell, thereby ensuring the stability of the electric clamp when it is placed or working.

[0020] (3) An openable top plate is provided above the outer shell of the device of the present invention, so that the electric clamp can be safely stored and properly placed.

[0021] (4) The device of the present invention is provided with a reel, which can automatically return the first connecting line to the reel after use, without the need for manual retraction, thereby improving operating efficiency, reducing the workload and labor intensity of the staff, and at the same time realizing the rapid storage of the cable for the resistivity detector, providing a neat, orderly, and easy-to-store and carry method for resistivity detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the device of the present invention;

[0023] Figure 2 It is a schematic diagram of the overall structure of the connector;

[0024] Figure 3 It is a schematic diagram of the structure when the electric clip in the connector is ejected;

[0025] Figure 4 It is a schematic diagram of the structure when the electric clip in the connector is retracted;

[0026] Figure 5 It is a schematic diagram of the push-pull seat structure;

[0027] Figure 6 It is a schematic diagram of the local structure of the connector housing;

[0028] Figure 7 is a schematic diagram of the support rod structure;

[0029] Figure 8 It is a schematic diagram of the winder structure.

[0030] Meaning of reference numerals:

[0031] 1-resistivity detector, 2-winder, 3-first connecting line, 4-second connecting line, 5-connector, 6-fixed seat, 7-plug-in end; 11-plug interface; 21-outer cylinder, 22-winding cylinder, 23-conductive slip ring, 24-winding spring; 51-outer shell, 52-push-pull seat, 53-electric clamp, 54-support rod, 55-first top plate, 56-second top plate, 57-transmission rod, 58-push-pull seat handle; 221-rotating shaft; 231-outer ring, 232-inner ring;

[0032] 511-front plate, 512-back plate, 513-bottom plate, 514-first side plate, 515-second side plate; 521-slider; 531-clamping plate, 532-guide column; 541-connecting part, 542-rod body, 543-first connecting block, 544-guide block, 545-second connecting block, 546-support spring; 5111-push-pull groove; 5121-first sliding groove, 5122-second sliding groove; 5451-guide groove; 51221-first inclined groove, 51222-straight groove, 51223-second inclined groove. DETAILED DESCRIPTION

[0033] The present invention is described in detail below with reference to the accompanying drawings and embodiments so that those skilled in the art can better understand the present invention.

[0034] It should be noted that in the following description, when the detailed description of known functions and designs may dilute the main content of the present invention, these descriptions will be omitted here. All components in the present invention, unless otherwise specified, are all components known in the prior art.

[0035] The terms "upper", "lower", "front", "back", "top", "bottom", etc. used in the present invention to indicate directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. "Inside" and "outside" refer to the inside and outside of the contour of the corresponding components, and the above terms should not be understood as limitations on the present invention.

[0036] In the present invention, unless otherwise stated, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection or an integral connection; it can be a mechanical connection or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Example 1

[0038] Following the above technical solution, Figure 1 As shown, this embodiment provides a resistivity monitoring device, including a resistivity detector 1, on which a plurality of plug interfaces 11 and a plurality of reels 2 are provided. The reels 2 are arranged on the side wall of the resistivity detector 1, and the number of reels 2 and the plug interfaces 11 are the same and correspond one to one. A first connecting wire 3 is wound inside each reel 2, and the tail end of the first connecting wire 3 is electrically connected to the tail end of a second connecting wire 4 arranged outside the reel 2; a connector 5 for connecting an electrode is provided at the head end of the first connecting wire 3, and a plug terminal 7 capable of being plugged and matched with the plug interface 11 is provided at the head end of the second connecting wire 4.

[0039] As a preferred solution of this embodiment, Figures 2 to 6 As shown, the connector 5 includes an outer shell 51, which includes a front plate 511, a back plate 512, a bottom plate 513, a first side plate 514 and a second side plate 515; a first slide groove 5121 is vertically arranged on the back plate 512, a push-pull seat 52 is slidably connected in the first slide groove 5121, an electric clamp 53 is arranged on the push-pull seat 52, and the electric clamp 53 is connected to the first connecting wire 3 inserted in the outer shell 51; a threading hole is formed through the bottom plate 513, and the first connecting wire 3 is inserted into the outer shell 51 through the threading hole; a retractable support rod 54 is hinged on the first side wall 514 and the second side wall 515, and the support rod 54 is also hinged to the push-pull seat 52. The push-pull seat 52 is used to drive the electric clamp 53 to move vertically in the outer shell 51, and can push the electric clamp 53 out of the outer shell 51, and can also retract the electric clamp 53 extending out of the outer shell 51 into the outer shell 51.

[0040] As a preferred solution of this embodiment, two second slide grooves 5122 are arranged on both sides of the first slide groove 5121 in a mirror-symmetrical manner; the electric clamp 53 includes two clamping plates 531 hinged on the push-pull seat 52. Preferably, a bracket is arranged on the push-pull seat 53, and a rotating shaft is mounted on the bracket. The two clamping plates 531 are both mounted on the rotating shaft, and each clamping plate 531 is provided with a guide column 532. The clamping plate 53 can move vertically under the drive of the push-pull seat 52, and then drive the guide column 532 to move along the second slide groove 5122. The opening and closing of the electric clamp 53 is realized through the structural design of the second slide groove 5122, specifically including: when the guide column 532 moves along the second slide groove 5122, it can provide pressure to the two clamping plates 531, so that the electric clamp 53 opens and closes.

[0041] As a preferred solution of this embodiment, the second slide groove 5122 includes a first inclined groove 51221, a straight groove 51222 and a second inclined groove 51223 which are connected from bottom to top; the distance between the center line of the first inclined groove 51221 and the center line of the first slide groove 5121 gradually decreases from bottom to top, and the distance between the center line of the second inclined groove 51223 and the center line of the first slide groove 5121 gradually increases from bottom to top.

[0042] When the guide post 532 moves along the second slide groove 5122, since the first inclined groove 51221 approaches each other from bottom to top, the upper ends of the two clamps 531 gradually separate and open during the movement. When the guide post 532 slides into the straight groove 51222, the upper end of the electric clamp 53 is opened to the maximum. After the electric clamp 53 extends out of the outer shell 51, the electric clamp 53 can be placed on both sides of the electrode to be connected. When the guide post 532 slides into the second inclined groove 51223, the upper ends of the electric clamp 53 approach each other to clamp the electrode to complete the connection. Conversely, when the push-pull seat 52 moves downward, the upper ends of the electric clamp 53 first gradually separate, then are in a completely separated state, and then are in a gradually merged state. When the guide post 532 slides to the bottom of the first inclined groove 51221, the electric clamp 53 is completely engaged.

[0043] As a preferred solution of this embodiment, the top of the outer shell 51 is also movably connected with a first top plate 55 and a second top plate 56, and the first top plate 55 and the second top plate 56 are respectively connected to the push-pull seat 52 via a transmission rod 57, and the transmission rod 57 can move under the drive of the push-pull seat 52 to achieve the connection and separation of the first top plate 55 and the second top plate 56. In this embodiment, the transmission rod 57 is hinged to the push-pull seat 52.

[0044] As a preferred solution of this embodiment, a push-pull seat handle 58 is also provided at the front end of the push-pull seat 52, and the push-pull seat handle 58 can be used to pull the push-pull seat 50. The push-pull seat handle 58 passes through the outer shell 51 through the push-pull groove 5111 provided on the front plate 511, and a slider 521 is provided at the rear end of the push-pull seat 52, and the slider 521 is slidably connected with the first slide groove 5121.

[0045] As a preferred solution of this embodiment, Figure 8 As shown, the reel 2 includes an outer cylinder 21, and a reel 22 coaxially rotatably disposed in the outer cylinder 21, and a first connecting wire 3 is wound on the reel 22; the head end of the first connecting wire 3 passes through the first through hole provided on the outer cylinder 21 and passes out of the reel 2, and the tail end of the first connecting wire 3 passes through the reel 22 through the first through hole provided on the reel 22, and is electrically connected to a conductive slip ring 23 penetrated into the reel 22; the conductive slip ring 23 is electrically connected to the tail end of a second connecting wire 4 disposed outside the reel 2;

[0046] A coil spring 24 is also provided inside the outer cylinder 21, and the coil spring 24 is connected to the rotating shaft 221 of the winding drum 22. The coil spring 24 can be tightened when the head end of the first connecting line 3 moves away from the outer cylinder 21, and can drive the rotating shaft 221 to rotate through the restoring force, so that the first connecting line 3 is wound around the winding drum 22.

[0047] When the present invention is in use, the first connecting line 3 is pulled, the winding drum 22 rotates, driving the rotating shaft 221 to rotate, so that the winding spring 24 is slowly tightened, and at the same time, the first connecting line 3 is extended until the connector 5 connected to the first connecting line 3 is connected to the electrode for testing; after the test is completed, the connector 5 is separated from the electrode, and the winding spring 24 continues to provide a large restoring force in the narrow space of the outer cylinder 21, driving the movable rotating shaft 221 to rotate, so that the winding drum 22 winds the first connecting line 3, thereby achieving the effect of automatic winding, avoiding the data line from being messy, entangled and knotted, and affecting the normal testing work.

[0048] As a preferred solution of this embodiment, the conductive slip ring 23 includes an outer ring 231 fixed to the inner wall of the fixing seat 6, and an inner ring 232 coaxially rotatably sleeved in the outer ring 231. The fixing seat 6 is arranged on one side of the winding drum 22. The inner ring 232 penetrates into the winding drum 22 through a first mounting hole provided on the outer cylinder 21 and a second mounting hole provided on the winding drum 22. The first mounting hole and the second mounting hole are coaxially connected with equal diameters. The working principle of the conductive slip ring 23 is mainly based on the electrical contact mode, and the electrical signal or electrical energy is transmitted through the contact between the metal contacts. The outer ring 231 and the inner ring 232 are connected through the contact points. When rotating, relative sliding occurs between the contact points, and the current can be transmitted through the contact points. It is an existing mature technology and will not be elaborated here.

[0049] As a preferred solution of this embodiment, Figure 7As shown, the support rod 54 includes a connecting portion 541, to which a rod body 542 is coaxially connected, and an active cavity is arranged in the rod body 542, in which a first connecting block 543, a guide block 544 and a second connecting block 545 are arranged in sequence from bottom to top, the bottom end of the first connecting block 543 is connected to the top of the connecting portion 541, the top of the first connecting block 543 is connected to the bottom end of the guide block 544, a guide groove 5451 is axially opened in the second connecting block 545, the upper part of the guide block 544 is penetrated in the guide groove 5451, and a support spring 546 is also sleeved on the outside of the guide block 544, the top of the support spring 546 is in contact with the bottom surface of the second connecting block 545, and the bottom of the support spring 546 is in contact with the top surface of the first connecting block 543.

[0050] like Figure 7 As shown, during the upward movement of the electric clamp 53, the push-pull seat 52 drives the guide block 544 to move upward in the guide groove 5451, compressing the support spring 546. During this process, the total length of the support rod 54 is reduced. During the movement, since the position of the transmission rod is also moving, the first top plate 55 and the second top plate 55 move to both sides with the top open to ensure that the electric clamp 53 can be extended normally. As the electric clamp 53 moves upward, the push-pull seat 52 pulls the first connecting block 543, causing the guide block 544 to move downward in the guide groove 5451, and the support spring 546 is stretched. During this process, the total length of the support rod 54 increases.

[0051] The use of this device is as follows:

[0052] Insert the prepared electrode into the foundation or reserved hole to be tested, place the resistivity detector 1 in a suitable position, insert the plug end connected to the second connecting line 4 into the plug interface 11 of the resistivity detector 1, and then manually drag the connector 5 so that the first connecting line 3 wound on the winding drum 22 is continuously drawn out from the outer cylinder 21, the first connecting line 3 drives the winding drum 22 to rotate, the winding drum 22 drives the inner ring 232 to rotate in the outer ring 231, and the winding drum 22 drives the rotating shaft 221 to rotate, so that the coil spring 24 is slowly tightened; when the connector 5 is connected, After moving to the specified position, the push-pull seat 52 is pushed upward, and the electric clamp 53 extends from the outer shell 51 and completes the connection with the electrode; the resistivity detector 1 is turned on to perform the resistivity test; after completing the resistivity test, the push seat 52 is pulled down, the electric clamp 53 is separated from the electrode, and the coil spring 24 continues to provide a large restoring force in the narrow space of the outer cylinder 21, driving the movable shaft 221 to rotate, so that the winding drum 22 winds the first connecting line 3, realizes the automatic storage of the first connecting line 3, and pulls the plug end out of the plug interface 11 of the resistivity detector 1, and ends the resistivity detection operation.

[0053] The above implementation process is only an example for clearly explaining the present application, and is not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of this application.

Claims

1. A resistivity monitoring device, comprising a resistivity detector (1), wherein the resistivity detector (1) is provided with a plurality of plug interfaces (11) and a plurality of reels (2), wherein the reels (2) correspond one to one with the plug interfaces (11), and wherein: A first connecting wire (3) is wound inside each of the reels (2), and the tail end of the first connecting wire (3) is electrically connected to the tail end of a second connecting wire (4) arranged outside the reel (2); the head end of the first connecting wire (3) is provided with a connector (5) for connecting an electrode, and the head end of the second connecting wire (4) is provided with a plug-in terminal (7) capable of plugging and cooperating with the plug interface (11).

2. The resistivity monitoring device according to claim 1, characterized in that: The connector (5) comprises an outer shell (51), and the outer shell (51) comprises a front plate (511), a back plate (512), a bottom plate (513), a first side plate (514) and a second side plate (515); a first slide groove (5121) is vertically arranged on the back plate (512), a push-pull seat (52) is slidably connected in the first slide groove (5121), and an electric clamp (53) is arranged on the push-pull seat (52), and the electric clamp (53) is connected to a first connecting line (3) passing through the outer shell (51); a retractable support rod (54) is hinged on both the first side wall (514) and the second side wall (515), and the support rod (54) is also connected to the push-pull seat (52).

3. The resistivity monitoring device according to claim 2, characterized in that: Two second slide grooves (5122) are arranged on both sides of the first slide groove (5121) in a mirror-symmetrical manner; the electric clamp (53) includes two clamping plates (531) hinged on the push-pull seat (52), and each clamping plate (531) is provided with a guide column (532). The guide column (532) can move along the second slide groove (5122) driven by the push-pull seat (52) to realize the opening and closing of the electric clamp (53).

4. The resistivity monitoring device according to claim 3, characterized in that: The second chute (5122) includes a first inclined chute (51221), a straight chute (51222) and a second inclined chute (51223) which are connected from bottom to top; the distance between the center line of the first inclined chute (51221) and the center line of the first chute (5121) gradually decreases from bottom to top, and the distance between the center line of the second inclined chute (51223) and the center line of the first chute (5121) gradually increases from bottom to top.

5. The resistivity monitoring device according to claim 2, characterized in that: The top of the outer shell (51) is also movably connected to a first top plate (55) and a second top plate (56); the first top plate (55) and the second top plate (56) are respectively connected to the push-pull seat (52) via a transmission rod (57); and the transmission rod (57) can move under the drive of the push-pull seat (52) to achieve connection and separation of the first top plate (55) and the second top plate (56).

6. The resistivity monitoring device according to claim 2, characterized in that: The front end of the push-pull seat (52) is also provided with a push-pull seat handle (58), and the push-pull seat handle (58) passes through the outer shell (51) through a push-pull groove (5111) provided on the front plate (511). The rear end of the push-pull seat (52) is provided with a sliding block (521), and the sliding block (521) is slidably connected to the first sliding groove (5121).

7. The resistivity monitoring device according to claim 1, characterized in that: The reel (2) comprises an outer cylinder (21), and a reel (22) coaxially rotatably arranged inside the outer cylinder (21), the first connecting wire (3) being wound around the reel (22); the head end of the first connecting wire (3) passes through a first through hole provided on the outer cylinder (21) and out of the reel (2), the tail end of the first connecting wire (3) passes through the first through hole provided on the reel (22) and enters the reel (22), and is electrically connected to a conductive slip ring (23) inserted into the reel (22); the conductive slip ring (23) is electrically connected to the tail end of a second connecting wire (4) arranged outside the reel (2); A coil spring (24) is also provided inside the outer cylinder (21), and the coil spring (24) is connected to the rotating shaft (221) of the winding drum (22). The coil spring (24) can be tightened when the head end of the first connecting line (3) moves in a direction away from the outer cylinder (21), and can drive the rotating shaft (221) to rotate through a restoring force, so that the first connecting line (3) is wound onto the winding drum (22).

8. The resistivity monitoring device according to claim 7, characterized in that: The conductive slip ring (23) comprises an outer ring (231) fixedly connected to the inner side wall of the fixing seat (6), and an inner ring (232) coaxially rotatably sleeved inside the outer ring (231); the inner ring (232) penetrates into the winding drum (22) through a first mounting hole provided on the outer cylinder (21) and a second mounting hole provided on the winding drum (22); the first mounting hole and the second mounting hole are coaxially connected with each other and have equal diameters.

9. The resistivity monitoring device according to claim 2, characterized in that: The support rod (54) comprises a connecting portion (541), a rod body (542) is coaxially connected to the connecting portion (541), an active cavity is arranged in the rod body (542), a first connecting block (543), a guide block (544) and a second connecting block (545) are arranged in sequence from bottom to top in the active cavity, the bottom end of the first connecting block (543) is connected to the top end of the connecting portion (541), the top end of the first connecting block (543) is connected to the bottom end of the guide block (544), a guide groove (5451) is axially provided in the second connecting block (545), the upper part of the guide block (544) is inserted into the guide groove (5451), and a support spring (546) is sleeved on the outside of the guide block (544), the top end of the support spring (546) is in contact with the bottom surface of the second connecting block (545), and the bottom end of the support spring (546) is in contact with the top surface of the first connecting block (543).

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