CN211741598U - Seismic wave CT string detector - Google Patents

Abstract

The utility model provides a seismic wave CT cluster form wave detector, it includes cylinder tube-shape gasbag and a plurality of piezoelectricity wave detector units through the cable conductor series connection, every piezoelectricity wave detector unit all is fixed in on the lateral wall of gasbag through the elastic adhesive tape adhesion and a plurality of piezoelectricity wave detector units along the even interval distribution of axial of gasbag, can make the piezoelectricity wave detector unit on its lateral wall and the inner wall of detecting the well paste the contact tightly after the gasbag is full of gas, the bottom of gasbag or the piezoelectricity wave detector unit bottom of below are connected with the weight, gasbag top and the lower extreme intercommunication of filling the gassing hose, it is equipped with valve or inflating valve on the gassing hose to fill. The piezoelectric detector unit adhered to the outer side wall of the air bag can be tightly pressed on the inner wall of the detection well after the air bag is inflated and expanded, the contact is good, water is not required to be injected into the detection well, and the piezoelectric detector unit is suitable for water shortage and severe well leakage areas; the structure is simple, and the detector units can be fixed on the side wall of the air bag, so that the detector is convenient and reliable.

Description

Seismic wave CT string detector

Technical Field

The utility model belongs to geological exploration and sensor field for the engineering survey, concretely relates to seismic wave CT cluster form wave detector.

Background

The seismic wave CT detector is a sensor for converting ground vibration into an electric signal, converts ground vibration caused by seismic waves below the ground into the electric signal, sends the electric signal to a seismometer on the ground through a cable, and obtains a geological exploration result through data processing. During seismic wave CT detection, two or more drill holes are arranged at a certain distance, one is a transmitting hole, the other is a receiving hole, a detection area is regarded as being composed of limited unit rock masses, each unit rock mass has different wave velocities due to different components and structures, the wave velocities of units in the observation area are obtained through picking up travel time observation of seismic direct waves between two holes and performing inversion calculation, a velocity distribution image of a rock-soil medium in the observation area is obtained, and a geological exploration result is finally obtained.

When the piezoelectric geophone in the prior art is used, water is generally filled into a detection well, so that the borehole wall vibrates and is guided to the geophone by taking the water as a medium, and the geophone acquires a strong vibration signal and ensures the sensitivity of the geophone; in areas with water shortage or severe well leakage, water cannot be injected into the well, so that the piezoelectric detector cannot be used, and the piezoelectric detector needs to be improved to enable the detector to be in good contact with the well wall, and transmission of vibration signals is guaranteed.

SUMMERY OF THE UTILITY MODEL

The utility model provides a seismic wave CT string form wave detector aims at overcoming the not enough that conventional piezoelectricity wave detector can't use in lack of water or severe area of lost circulation among the prior art.

The utility model provides an above-mentioned technical problem's technical scheme as follows: the utility model provides a seismic wave CT cluster form wave detector, its includes cylinder tube-shape gasbag and a plurality of piezoelectricity wave detector units through cable conductor series connection, every piezoelectricity wave detector unit all is fixed in through the adhesion of elasticity adhesive tape on the lateral wall of gasbag and a plurality of piezoelectricity wave detector unit follows the even interval distribution of axial of gasbag, can make on its lateral wall after the gasbag is full of gas piezoelectricity wave detector unit pastes the contact tightly with the inner wall that detects the well, the bottom or the below of gasbag piezoelectricity wave detector unit bottom is connected with the weight, the gasbag top with fill the lower extreme intercommunication of inflating and deflating the hose, it is equipped with valve or inflating valve on the deflating hose.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Furthermore, a valve is arranged on the inflation and deflation hose, and the upper end of the inflation and deflation hose is communicated with an electric inflator pump above the ground.

The electric inflator pump saves labor, is quick to inflate, can ensure that the air bag is stable in a full state by closing the valve after inflating every time, is more convenient to deflate, and can be opened directly; the disadvantage is that when used in field, the electricity is not easy to get and the battery is needed to be carried.

Further, the upper end of the air inflation and deflation hose is provided with an inflating valve which is communicated with an air inflation joint of an inflator above the ground.

The air valve has the advantages that the air valve has the function of one-way ventilation, can be directly filled during inflation, does not worry about outward leakage of filled air, and is suitable for manual inflation operation in an inflator mode; the disadvantages are high labor intensity and slow inflation.

Furthermore, a wire connecting ring is fixedly arranged at the center of the bottom of the air bag and is fixedly connected with the heavy hammer through a steel wire rope.

The beneficial effect of adopting above-mentioned further scheme is, simple structure, it is convenient to connect.

Further, a plurality of the piezoelectric detector units on the outer side wall of the air bag are located on the same straight line.

The piezoelectric wave detector on the same vertical line can be pressed on the same vertical line on the side wall of the detection well by the air bag, and the problem that the whole air bag is likely to generate a torsion spiral after being inflated when the air bag is not on the same vertical line is avoided as much as possible.

Further, the air bag is a rubber air bag, and the elastic rubber strip is a rubber strip.

The rubber material has the beneficial effects of weather resistance, wear resistance and long service life.

Compared with the prior art, the beneficial effects of the utility model are that:

after the air bag is inflated and expanded, the piezoelectric geophone unit adhered to the outer side wall of the air bag can be tightly pressed on the inner wall of the detection well, the contact is good, seismic waves at the well wall of the detection well can be ensured to be smoothly transmitted to the piezoelectric geophone unit, water is not required to be injected into the detection well, and the piezoelectric geophone is suitable for seismic wave CT detection in areas with serious water shortage and well leakage; the structure is simple, the structure that the existing detector string is connected with each detector unit in series through a cable is not changed, and each detector unit is fixed on the side wall of the air bag, so that the detection device is convenient and reliable.

Drawings

Fig. 1 is a schematic structural view of a seismic wave CT string detector provided by the present invention;

FIG. 2 is a schematic view of FIG. 1 taken along a section line;

FIG. 3 is a schematic diagram of the string geophone of FIG. 1 positioned in a test well for seismic testing.

In the drawings, the components represented by the respective reference numerals are listed below:

1. an air bag; 2. a cable wire; 3. a piezoelectric wave detector unit; 4. an elastic rubber strip; 5. detecting a well; 6. a weight; 7. an air inflation and deflation hose; 8. a valve; 9. and a wire connecting ring.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

In the description of the present invention, if terms indicating orientation such as "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", etc. are used, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 1 to 3, the utility model provides a seismic wave CT cluster form wave detector, it includes cylinder tube-shape gasbag 1 and a plurality of piezoelectricity wave detector unit 3 through cable conductor 2 series connection, every piezoelectricity wave detector unit 3 all is fixed in through 4 adhesion of elasticity adhesive tape on the lateral wall of gasbag 1 and a plurality of piezoelectricity wave detector unit 3 is followed the even interval distribution of axial of gasbag 1, can make on the lateral wall thereof after gasbag 1 is full of gas piezoelectricity wave detector unit 3 contacts with the inner wall subsides of inspection shaft 5 tightly, the bottom or the bottom of gasbag 1 piezoelectricity wave detector unit 3 bottom is connected with weight 6, gasbag 1 top and the lower extreme intercommunication of filling and discharging hose 7, be equipped with valve 8 or inflating valve on the hose 7 of filling and discharging.

It should be noted that the inflation and deflation hose and the cable can be used as the bearing cable for the string-shaped detector to be lowered into the detection well respectively or simultaneously, the detector can be paid off by pure manual operation or by using a winch and other equipment, the air bag is in an uninflated state during paying off, and after the detector is placed to a specified depth in the detection well, the air bag is inflated through the inflation and deflation hose, so that each piezoelectric detector unit is pressed to the wall of the detection well.

In a preferred embodiment of the present invention, the air inflation/deflation hose 7 is provided with a valve 8, and the upper end of the air inflation/deflation hose 7 is communicated with an electric inflator pump above the ground.

It should be noted that the speed of the electric inflator should not be too fast when the electric inflator is inflated, so as to avoid torsion when the airbag is inflated. In addition, when the electric inflator pump is used, the upper end of the air inflation and deflation hose can be provided with an air valve.

In a preferred embodiment of the present invention, the inflation/deflation hose 7 is provided with an air valve at the upper end, and the air valve is communicated with an inflation joint of an inflator above the ground.

In a preferred embodiment of the present invention, a wire ring 9 is fixedly disposed at the bottom center of the airbag 1, and the wire ring 9 is fixedly connected to the weight 6 through a steel wire.

In a preferred embodiment of the present invention, the plurality of piezoelectric wave detector units 3 on the outer sidewall of the airbag 1 are located on the same straight line.

In a preferred embodiment of the present invention, the air bag 1 is a rubber air bag, and the elastic rubber strip 4 is a rubber strip.

It should be noted that the elastic rubber strip and the outer sidewall of the airbag are fixedly bonded by flexible glue (which is only used for tire repair glue).

The utility model provides a use method of seismic wave CT string form geophone briefly states as follows:

firstly, slowly lowering the air bag and the piezoelectric wave detector units adhered to the outer side wall of the air bag into the detection well to a specified depth in an uninflated state, then inflating the air bag on the ground by using an electric inflator pump or an inflator and the like, after the air bag is full of air, pressing the piezoelectric wave detector units on the detection well wall by the expanded air bag, and then carrying out seismic wave detection. In addition, the launching well, the source controller, the electric spark source, the seismograph and the like required during detection are the same as those in the prior art, and are not described herein again.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (6)

1. The seismic wave CT string-shaped detector is characterized by comprising a cylindrical air bag (1) and a plurality of piezoelectric detector units (3) which are connected in series through cables (2), wherein each piezoelectric detector unit (3) is fixed on the outer side wall of the air bag (1) in an adhering manner through an elastic adhesive tape (4) and a plurality of piezoelectric detector units (3) are uniformly distributed at intervals along the axial direction of the air bag (1), after the air bag (1) is filled with air, the piezoelectric wave detector unit (3) on the outer side wall of the air bag can be closely contacted with the inner wall of the detection well (5), the bottom of the air bag (1) or the bottom of the piezoelectric wave detector unit (3) at the lowest part is connected with a heavy hammer (6), the top of the air bag (1) is communicated with the lower end of an air inflation and deflation hose (7), and a valve (8) or an air valve is arranged on the air inflation and deflation hose (7).

2. The geophone in series according to claim 1, wherein the inflation and deflation hose (7) is provided with a valve (8) and the upper end of the inflation and deflation hose (7) is communicated with an electric inflator pump above the ground.

3. The geophone in accordance with claim 1, wherein the air inflation and deflation hose (7) is provided with an air valve at the upper end and the air valve is communicated with the air inflation connector of the inflator above the ground.

4. The geophone in series according to claim 1, wherein the bottom center of the air bag (1) is fixedly provided with a wire connection ring (9), and the wire connection ring (9) is fixedly connected with the weight (6) through a steel wire rope.

5. A geophone in string form according to claim 1, characterized in that said piezoelectric geophone units (3) on the outside wall of the envelope (1) are located on the same line.

6. A seismic CT string detector as claimed in any of claims 1 to 5, wherein the air-bag (1) is a rubber air-bag and the resilient strip (4) is a rubber strip.

Images