CN216248335U

CN216248335U - Soil resistivity measuring device

Info

Publication number: CN216248335U
Application number: CN202122855677.1U
Authority: CN
Inventors: 单波; 李党民; 鄢治华; 王延辉; 耿方方; 周碧霄
Original assignee: Northwest Electric Power Design Institute of China Power Engineering Consulting Group
Current assignee: Northwest Electric Power Design Institute of China Power Engineering Consulting Group
Priority date: 2021-11-19
Filing date: 2021-11-19
Publication date: 2022-04-08
Anticipated expiration: 2031-11-19

Abstract

The utility model discloses a device for measuring soil resistivity, which comprises a first wire coil, a second wire coil and a measuring wire body, wherein the first wire coil is arranged on the first wire coil; the first wire coil is sleeved outside the second wire coil; the first wire coil is rotatably connected with the second wire coil; grooves are formed in the inner ring and the outer ring of the first wire coil, and a measuring wire body is wound along the circumferential direction of the grooves; a handheld part is arranged inside the second wire coil; and a winding type cable label is arranged at the position of the polar distance on the measuring wire body. The device has two drums that the cover was established rotate for the use of device is more convenient, and is laborsaving, has effectively controlled manpower, material resources cost, and has reduced the engineering degree of difficulty.

Description

Soil resistivity measuring device

Technical Field

The utility model belongs to the field of engineering investigation and detection, and relates to a soil resistivity measuring device.

Background

The soil resistivity test is a basic work of electric power engineering, is used for acquiring resistivity data of soil and provides basic data for arrangement of a grounding grid and a grounding electrode. At present, the soil resistivity test in the power industry mainly adopts an electrical prospecting method in the earth physics. The types of devices commonly used in China currently have a few types: a dipole device, a triode device, a combined profile device, a symmetric quadrupole device, a dipole device, an intermediate gradient device, etc. Whatever the type of device, the common features are: supplying power to the ground with a power supply electrode (A, B) while observing a potential difference (DeltaU) between the measuring electrodes (M, N)_MN) And calculating apparent resistivity (rho)_s) The electrodes are simultaneously (or only the measuring electrodes) advanced and observed point by point along the selected line.

The electric power system mainly adopts a symmetrical quadrupole device, and in order to detect the resistivity change of soil in depth, an electric sounding method is generally adopted, which is characterized in that: the power supply electrode (A, B) and the measuring electrode (M, N) move outwards in opposite directions at the same time on two sides of the measuring point (O), and a certain proportion is kept, so that AB/3 is more than or equal to MN more than or equal to AB/30 (currently, the proportion value is generally MN/AB-1/3). The length of the pay-off line is different according to the measurement depth. The measurement depth is about large, the longer the pay-off length is, generally speaking, the pay-off depth is 6m, the power supply electrode polar distance AB/2 needs to pay off 40m, if the pay-off depth is 300m, the power supply electrode polar distance AB/2 needs to pay off about 650m, and the design list of the polar distance is shown in Table 1.

TABLE 1 Pole-spacing design List

As can be seen from Table 1, if the line is paid out to a length of 650m, AB/2 requires 14 pole pitches to be arranged, and there are also 14 pole pitches to be measured. In the field data acquisition process, a power supply (generally a battery box) needs to be connected with a host, and meanwhile, electrodes need to be connected with leads to form a loop for measurement.

At present, in engineering application, the requirements of measuring the earth conductivity of a transmission line, measuring the resistivity and measuring the depth in projects such as a 750kv transformer substation, a 330kv transformer substation and the like are large, the paying-off distance of a long line AB/2 is generally above 650m, the resistivity and measuring the depth in projects such as wind power, photovoltaic and the like are generally shallow, the measuring line is also short, the paying-off distance of the long line AB/2 is generally below 100m, the cable used for paying-off is generally wound and unwound by using a paying-off tool such as an iron winding frame at present, in order to ensure that the long-lasting durable iron winding frame generally adopts iron, the specification (the width of a winding frame disk and the diameter of the winding frame disk) adopted along with different winding lengths is generally between 230mm and 400 mm, the quality is large and heavy, and the measurement and acquisition generally adopts an inner core of three steel and four copper for ensuring certain drawing strength, so the heavy winding frame is added to the cable, a weight of more than ten kilograms is reached. Engineering projects such as wind-powered electricity generation, photovoltaic often are in mountain area, mountain top, abrupt slope etc. and put, if adopt the collection system of above-mentioned iron wire winding frame, not only carry inconveniently, have still increased manpower, material resources cost and engineering degree of difficulty, and personnel's climbing still produces the safety problem easily at abrupt slope, mountain top. In addition, the connection part of each thread end is basically and conventionally clamped by a common crocodile clip, but the thread end is frequently and repeatedly clamped and is easy to break, the crocodile clip is easy to fatigue along with the increase of the use times to generate quality problems, and rubber skin outside the crocodile clip is also hardened to influence the clipping opening space of the clip and cannot be normally used; the polar distance needs to be marked at the position of unwrapping wire cable, adopt white medical sticky tape winding to paste usually, then the corresponding polar distance apart from the figure of handwriting, but after a period of use, the writing leads to fuzziness owing to frequently looking over the friction easily, and receive and release on the ground along with the cable, it is full of soil matter easily to glue on the sticky tape, thereby lose viscidity, arouse to drop, lead to the mark position to lose, can't exert the marking effect, cause the misdetection in the actual work, miss the survey problem, influence data acquisition, still need rework retest and paste the sticky tape again after the discovery problem, it is time-consuming to take a lot of work.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems in the prior art, the utility model provides a soil resistivity measuring device, so that a wire frame is convenient, the engineering use is convenient and portable, the labor and material cost and the engineering difficulty are reduced, and the safety problem is avoided.

The utility model is realized by the following technical scheme:

a soil resistivity measuring device comprises a first wire coil, a second wire coil and a measuring wire body;

the first wire coil is sleeved outside the second wire coil; the first wire coil is rotatably connected with the second wire coil;

grooves are formed in the inner ring and the outer ring of the first wire coil, and the measuring wire body is wound along the circumferential direction of the grooves;

a handheld part is arranged inside the second wire coil;

and a winding type cable label is arranged at the position of the polar distance on the measuring wire body.

Preferably, the first wire coil and the second wire coil are coaxially arranged.

Preferably, be equipped with the screw bearing between first drum and the second drum, first drum passes through with the second drum screw bearing rotation connection sets up.

Preferably, a plurality of line stop levers are arranged on the outer ring of the first wire coil at intervals along the circumferential direction of the first wire coil.

Preferably, the inner ring of the first wire coil is provided with a wire outlet, one end of the measuring wire body penetrates through the wire outlet to be connected with a power supply, and the other end of the measuring wire body is connected to the test point.

Preferably, a crank is arranged on the side of the first wire coil.

Preferably, the second wire coil is further provided with a hook part.

Preferably, one end of the measuring line body is an AUX female head, and the AUX female head of the measuring line body is connected with an AUX male head at a polar distance position in a matching manner; the other end of the measuring line body is an AUX male head, and the AUX male head of the measuring line body is connected with an AUX female head at the host end in a matched mode.

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

the utility model provides a measuring device of soil resistivity, the device have rotate two drums that the cover was established for the use of device is more convenient, and is laborsaving, has effectively controlled manpower, material resources cost, and has reduced the engineering degree of difficulty, and wound form cable label makes the effective mark of cable, avoids the mistake to survey, neglects to survey.

Further, the first wire coil and the second wire coil are coaxially arranged, so that the stability of the device is better.

Furthermore, the cable that the setting of line pin was avoided remains throughout on first drum in the use for the use of device is more convenient.

Furthermore, the crank enables the device to be more convenient and labor-saving to use.

Furthermore, the hook part can be more convenient and fast in the carrying process.

Furthermore, one end of the measuring line body is an AUX female head, and the AUX female head of the measuring line body is connected with the AUX male head at the polar distance position in a matching manner; the other end of the measuring line body is an AUX male head, and the AUX male head of the measuring line body is connected with an AUX female head at the host end in a matched mode, so that the connection is convenient to insert and more stable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic cross-sectional view taken along plane A-A of FIG. 1;

FIG. 3 is a schematic view of a line bar according to the present invention;

FIG. 4 is a schematic structural diagram of the female connector of the cable jack of the present invention;

FIG. 5 is a schematic structural view of a male plug of a cable jack according to the present invention;

fig. 6 is a schematic diagram of a wrap-around cable label structure.

Wherein: 1. the device comprises a first wire coil, a second wire coil, a first holding part, a second holding part, a first crank, a second crank, a first screw bearing, a second screw bearing, a first wire outlet, a second wire outlet, a first hook part, a second hook part, a first wire stop rod, a second wire stop rod, a third screw shaft, a fourth screw shaft, a fifth screw shaft, a sixth screw shaft, a fifth shaft.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "upper", "lower", "horizontal", "inner", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the products of the present invention are used, the description is only for convenience and simplicity, but the indication or suggestion that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the term "horizontal", if present, does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The utility model is described in further detail below with reference to the accompanying drawings:

as shown in fig. 1 and 2, the soil resistivity measuring device comprises a first wire coil 1, a second wire coil 2 and a measuring wire body; the diameter of the wire coil is 24-30 centimeters, and the wire coil can be adjusted and selected according to requirements. The first wire coil 1 is sleeved outside the second wire coil 2; the first wire coil 1 is coaxially and rotatably connected with the second wire coil 2; the measuring line body is wound along the circumferential direction of the first wire coil 1. Be equipped with screw bearing 4 between first drum 1 and the second drum 2, first drum 1 passes through screw bearing 4 with second drum 2 and rotates to be connected the setting. The inner ring and the outer ring of the first wire coil 1 are both provided with grooves, the grooves of the outer ring are wire grooves for winding cables, and the grooves of the inner ring are connected with the second wire coil 2 through screw bearings 4. The width of the outer ring slot is 3-5 cm, the depth is 4-6 cm, and the outer ring slot can be adjusted and selected according to requirements. First drum 1 and second drum 2 can adopt ABS plastics material, and is light firm. As shown in fig. 3, a plurality of line stop levers 7 are arranged on the outer ring of the first wire coil 1 at intervals along the circumferential direction of the first wire coil 1, so that the wire can be conveniently taken up and paid off, and can be effectively stopped to prevent the wire from being wound outside the wire coil during winding. An outlet 5 is arranged on the inner ring of the first wire coil 1. As shown in fig. 5, one end of the measuring line body is made into an AUX male connector, and passes through the outlet 5 to be connected with the host, and meanwhile, the binding post at the host end A, B, M, N is connected into an AUX female connector, so that the AUX female connector can be conveniently spliced with the cable AUX male connector. As shown in fig. 4, the other end of the measuring line body is made into an AUX female head, and after being wound in the external coiling slot through a cable, the other end of the measuring line body can be wound on the line stop rod and connected to the polar distance position, and the electrode rod at the polar distance position is made into an AUX male head, so that the connection is convenient. The specifications of the AUX male and female heads are shown in Table 2. The side of first drum 1 is provided with crank 3, conveniently receive and releases the cable. As shown in fig. 1, the second wire coil 2 is provided with a holding portion 21 inside, so that the second wire coil can be held by a hand, and the holding of the wire holder is convenient and fast. The second reel 2 is also provided with a hook part 6 and a strap, and the strap can be used through the hook part 6, so that the operation is convenient. As shown in fig. 6, a wound cable tag is provided at a pole pitch position on the measuring wire body. Winding type cable label comprises colored text district 10 and transparent district 11, and the specification is seen in table 3, winding type cable label twines colored text district earlier, then twines transparent district, covers the discernment polar distance sign that can be clear after pasting, can be waterproof, grease proofing, can not torn rotten, earth is infected with the back, light wiping can.

The utility model discloses a soil resistivity measuring device, which consists of a winding frame, a plug-in interface male and female head and a winding type cable tag, is light, handy and flexible, and is suitable for regions with inconvenient transportation, such as depth measurement, mountain areas and the like.

TABLE 2 Male and female connector specifications of the interface

TABLE 3 Cable Label parameters

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The device for measuring the soil resistivity is characterized by comprising a first wire coil (1), a second wire coil (2) and a measuring line body;

the first wire coil (1) is sleeved outside the second wire coil (2); the first wire coil (1) is rotatably connected with the second wire coil (2);

grooves are formed in the inner ring and the outer ring of the first wire coil (1), and the measuring wire body is wound along the circumferential direction of the grooves;

a handheld part (21) is arranged inside the second wire coil (2);

2. A soil resistivity measuring device according to claim 1, characterized in that the first coil (1) is arranged coaxially with the second coil (2).

3. A soil resistivity measuring device according to claim 1, characterized in that a screw bearing (4) is arranged between the first wire coil (1) and the second wire coil (2), and the first wire coil (1) and the second wire coil (2) are rotatably connected through the screw bearing (4).

4. A soil resistivity measuring device according to claim 1, characterized in that a plurality of lines of stop bars (7) are arranged at intervals along the circumference of the first coil (1) at the outer ring of the first coil (1).

5. A soil resistivity measuring device according to claim 1, characterized in that the inner ring of the first wire coil (1) is provided with an outlet (5), one end of the measuring wire body passes through the outlet (5) to be connected with a power supply, and the other end is connected to a test point.

6. A soil resistivity measuring device according to claim 1, characterized in that the side of the first coil (1) is provided with a crank (3).

7. A soil resistivity measuring device according to claim 1, characterized in that the second wire coil (2) is further provided with a hook part (6).

8. The soil resistivity measuring device of claim 1, wherein one end of the measuring line body is an AUX female head, and the AUX female head of the measuring line body is in fit connection with an AUX male head at a polar distance position; the other end of the measuring line body is an AUX male head, and the AUX male head of the measuring line body is connected with an AUX female head at the host end in a matched mode.