CN106526682B - A kind of electrode protecting device making across hole CT experiments of the close electrical instrument of superelevation - Google Patents

Abstract

The invention discloses an electrode protection device for a cross-hole CT test using an ultra-high-density electrical instrument, which includes a soft protective cover and two lead blocks. The opposite sides of the soft protective cover are snapped together to form a ring-shaped protective ring. Two grooves are arranged on the protective cover, and the two grooves are symmetrically distributed along the circumferential direction of the protective ring, and two through holes are respectively arranged at the bottom of the two grooves, and a part of the two lead blocks are respectively embedded in the two grooves. The device has a simple structure and is easy to operate, and can effectively protect the electrode from being damaged due to the occurrence of electrolysis after encountering groundwater with high salt content.

Description

An electrode protection device for cross-hole CT test with ultra-high density electrical instrument

technical field

The invention relates to the technical field of geological exploration, in particular to an electrode protection device for cross-hole CT tests using ultra-high-density electrical instruments.

Background technique

The cross-hole CT test is an important geological survey method. It is a commonly used method to do the cross-hole CT test with ultra-high-density electrical instruments. During the test, two measuring lines with electrodes are put into two pre-drilled In a good geological hole, and electrify the survey line to create an artificial DC electric field at different depths in the formation, and then explore the geological structure of the formation. The electrode is an indispensable part in the trans-hole CT test using the ultra-high-density electrical method. Currently, the popular equipment on the market connects the electrode and the measuring line to form a cable. If the electrode is damaged, it will be difficult to replace it. During the test, the measuring line with the electrode is directly put into the pre-drilled geological hole and is in contact with the groundwater. When the salt content of the groundwater is high (such as seawater), the electrode made of metal is energized. It is easy to cause electrolysis in water, and it is extremely easy to cause damage to the electrode. Therefore, it is necessary to invent a protection device that can prevent the electrode from being damaged due to electrolysis after encountering a strong electrolyte solution.

Contents of the invention

In order to solve the problems existing in the above-mentioned prior art, the present invention provides an electrode protection device for cross-hole CT test with an ultra-high-density electrical instrument. Higher groundwater will not cause damage due to electrolysis.

The technical scheme adopted to realize the above-mentioned purpose of the present invention is:

An electrode protection device for cross-hole CT tests using ultra-high-density electrical instruments, including a soft protective cover and two lead blocks. The opposite sides of the soft protective cover are snapped together to form a ring-shaped protective ring. Two grooves are arranged, and the two grooves are symmetrically distributed along the circumferential direction of the protection ring, and two through holes are respectively arranged at the bottom of the two grooves, and a part of the two lead blocks are respectively embedded in the two grooves.

The soft protective cover includes a main body of the protective cover and two ear plates, the main body of the protective cover is square, and the two ear plates are in the shape of strips, and the two ear plates are connected to the opposite sides of the main body of the protective cover in a staggered manner, one of the ear plates A card slot is provided, and a protrusion is provided on the other ear plate, and the protrusion is clamped in the card slot.

There are two card slots and protrusions, the two card slots are symmetrically arranged on both sides of the ear plate corresponding to it, the protrusions are symmetrically arranged on both sides of the ear plate corresponding to it, and the two protrusions are respectively locked on the corresponding in the two card slots.

The main body of the protective cover, the two ear plates, the two card slots and the two protrusions are of an integrated structure.

The groove is a square groove, the lead block is a square stepped structure, and the large square part of the lead block is embedded in the groove.

The soft protective sheath is made of thermoplastic silicone rubber.

Compared with the prior art, the present invention has beneficial effects and advantages in that:

1) The protection device utilizes the conductivity of the lead block, and uses the lead block that is in close contact with the electrode to contact the groundwater through the through hole on the protective cover instead of the electrode directly contacting the groundwater. During the electrification process, the electrolysis phenomenon will occur in the lead block The contact surface with the groundwater has played a very good role in protecting the electrode, especially in the groundwater with high salt content, the effect of this protection device is more obvious.

2) The materials used in the protective device are thermoplastic silicone rubber and lead weights, which are low in cost, simple in structure and easy to use.

Description of drawings

Fig. 1 is the structural diagram of the electrode protection device of the present invention that uses the ultra-high-density electrical instrument to do the cross-hole CT test.

Fig. 2 is a schematic diagram of the structure of the soft protective case.

Figure 3 is a schematic structural view of the lead block.

Figure 4 is a schematic diagram of the structure of the electrode.

Among them, 1-soft protective cover, 2-lead block, 3-groove, 4-through hole, 5-protective cover body, 6-ear plate, 7-protrusion, 8-card slot, 9-electrode shell, 10 - Window hole.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings.

The structure of the electrode protection device for cross-hole CT test with ultra-high-density electrical instrument of the present invention is shown in Figure 1. The device includes a soft protective cover 1 and two lead blocks 2, and the material of the soft protective cover is thermoplastic silicone rubber. , has good water resistance and toughness, and can be rolled into a ring-shaped protective ring to wrap around the outer shell of the electrode.

The soft protective cover 1 includes a protective cover main body 5 and two lugs 6 , the protective cover main body 5 is square, and the two ear plates 6 are elongated. Two card slots 8 are symmetrically provided on both sides of one of the ear plates 6, and two protrusions 7 are symmetrically provided on both sides of the other ear plate 6, and the two protrusions 7 are engaged in the corresponding two card slots 8 respectively. The two lugs 6 of the soft protective sheath 5 are snapped together to form an annular protective ring. The inner diameter of the protective ring is slightly smaller than the outer diameter of the electrode casing, so that the protective ring is tightly wrapped on the electrode casing. The size of the slot on the ear plate is slightly smaller than the size of the protrusion, so that the slot and the protrusion can be tightly connected. The main body 5 of the protective cover, the two lug plates 6, the two card slots 8 and the two protrusions 7 are of an integrated structure, and are integrally formed during processing.

As shown in FIG. 2 , two square grooves 3 are provided on the soft protective cover 1 . After the soft protective cover 1 is clamped to form a protective ring, the two grooves 3 are symmetrically distributed along the circumferential direction of the protective ring. Two through holes 4 are respectively provided in the center of the bottom of the two grooves 3 . The purpose of setting the groove is to make the lead block embedded in the groove and form a whole with the soft protective cover. The two through holes at the bottom of the groove are to make the lead block wrapped by the soft protective cover contact with the groundwater instead of the electrode. .

As shown in FIG. 4 , two window holes 10 are provided on the electrode casing 9 , and the two metal sheet electrodes are respectively in contact with groundwater through the two window holes 10 . As shown in Figure 3, the lead block 2 has a square stepped structure, the large square part of the lead block 2 is embedded in the groove 3, and the small square part of the lead block 2 is embedded in the window hole 10, and the lead block is bonded and contacted with the electrode. , so the size of the small square part of the lead block 2 is determined by the size of the window hole 10.

The electrode protection device is also suitable for solving the electrolysis problem of the electrode in the strong electrolyte solution when doing other types of geological exploration tests.

The method of using the electrode protection device for the cross-hole CT test with the ultra-high-density electrical instrument of the present invention is as follows:

First put the large square parts of the two lead weights into the two grooves of the soft protective cover, and then insert the small square parts of the two lead weights into the corresponding window holes, so that the two lead weights are respectively connected to the corresponding electrodes. Fitting and contacting, in this process, the soft protective sleeve is bent into a ring shape, and the protrusion is snapped into the slot to form a protective ring, and the protective ring is tightly wrapped around the periphery of the electrode shell.

Claims (6)

1. a kind of electrode protecting device making across hole CT experiments of the close electrical instrument of superelevation, it is characterised in that：Including soft protection Set and two leads form the protection ring of annular after the opposite both sides clamping of soft protective case, set that there are two recessed on soft protective case Slot, two grooves are symmetrical along protection ring circumferencial direction, and two bottom portion of groove are respectively equipped with two through hole, wherein one of two leads It is respectively embedded into two grooves.

2. the electrode protecting device according to claim 1 for making across hole CT experiments of the close electrical instrument of superelevation, feature exist In：The soft protective case includes protective case main body and two otic placodes, and protective case main body is square, two otic placodes be in strip, two Otic placode is cross-linked respectively in the opposite both sides of protective case main body, and one of otic placode is equipped with card slot, is in addition set on an otic placode There are protrusion, protrusion to be connected in card slot.

3. the electrode protecting device according to claim 2 for making across hole CT experiments of the close electrical instrument of superelevation, feature exist In：There are two the card slots and protrusion, and two card slots are symmetrically disposed on the both sides of corresponding otic placode, and protrusion is symmetrically disposed on On the both sides of corresponding otic placode, two protrusions are connected in respectively in two corresponding card slots.

4. the electrode protecting device according to claim 3 for making across hole CT experiments of the close electrical instrument of superelevation, feature exist In：Protective case main body, two otic placodes, two card slots and two protrusions are an integral structure.

5. according to any electrode protecting devices for making across hole CT experiments of the close electrical instrument of superelevation of claim 1-4, It is characterized in that：The groove is square groove, and the lead is rectangular hierarchic structure, the big projected square part insertion of lead size In groove.

6. the electrode protecting device according to claim 5 for making across hole CT experiments of the close electrical instrument of superelevation, feature exist In：The material of the soft protective case is thermoplasticity silicon rubber.