CN112180461B - Cavity detection device, detection method and liquid-gas storage method - Google Patents
Cavity detection device, detection method and liquid-gas storage method Download PDFInfo
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- CN112180461B CN112180461B CN202010954535.8A CN202010954535A CN112180461B CN 112180461 B CN112180461 B CN 112180461B CN 202010954535 A CN202010954535 A CN 202010954535A CN 112180461 B CN112180461 B CN 112180461B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V9/00—Prospecting or detecting by methods not provided for in groups G01V1/00 - G01V8/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F17/00—Methods or apparatus for determining the capacity of containers or cavities, or the volume of solid bodies
Abstract
The cavity detection device comprises an air extraction module, an air injection module and a pipe fitting, wherein the pipe fitting comprises a first pipe fitting and a second pipe fitting sleeved on the outer side of the first pipe fitting, one end of the pipe fitting is connected with the air extraction module and/or the air injection module through a sealing piece, and the other end of the pipe fitting is used for extending into a cavity; one end of the first pipe fitting, which is used for extending into the cavity, is sleeved with an elastic memory air bag, and the position, which is not extended into the cavity, of the second pipe fitting is provided with at least one vent hole; the method adopts the high-molecular memory air bag to truly memorize the boundary of the cavity, realizes accurate and rapid measurement of the volume and the shape of the cavity, and can be used for storing urban emergency water, oil, gas and the like after the volume and the boundary of the cavity are determined.
Description
Technical Field
The present disclosure relates to the field of cavity detection technologies, and in particular, to a cavity detection device, a detection method, and a liquid-gas storage method.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
In the underground engineering construction process, the problem of surface collapse caused by stratum cavities is particularly prominent, and the existing karst cave or cavity detection method mainly comprises laser detection and acoustic wave detection.
The inventor of the present disclosure finds that, when an irregular karst cave is encountered, a blind area exists and signals overlap, which further causes inaccurate exploration; after a specific cavity position is detected, the volume of the cavity cannot be determined exactly by the existing detection method, namely the real volume of the cavity cannot be measured; the existing detection method can only carry out qualitative measurement on the cavity and cannot accurately obtain the shape of the cavity.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides a cavity detection device, a detection method and a liquid-gas storage method.
In order to achieve the purpose, the following technical scheme is adopted in the disclosure:
a first aspect of the present disclosure provides a hole detection apparatus.
A cavity detection device comprises an air exhaust module, an air injection module and a pipe fitting, wherein the pipe fitting comprises a first pipe fitting and a second pipe fitting sleeved on the outer side of the first pipe fitting, one end of the pipe fitting is connected with the air exhaust module and/or the air injection module through a sealing piece, and the other end of the pipe fitting is used for probing into a cavity;
one end of the first pipe fitting, which is used for penetrating into the cavity, is sleeved with an elastic memory air bag, and at least one vent hole is formed in the position, which is not penetrated into the cavity, of the second pipe fitting.
As some possible implementations, the first and/or second tube is a bellows.
As some possible implementations, the elastic memory balloon is a polymeric elastic memory balloon.
As some possible implementations, the first and second tubular members are coaxially arranged.
As some possible realization modes, a gas density meter and a cable are arranged in the elastic memory air bag, and the cable penetrates out through the first pipe fitting.
As some possible implementations, the air exhaust module includes an air exhaust pump, a gas densimeter and a gas flowmeter, and the air injection module includes an air pump, a gas densimeter and a gas flowmeter, and both the air exhaust pump and the air pump are communicated with the end, far away from the hollow, of the second pipe fitting through a pipeline and a sealing piece.
As some possible implementations, the seal is a sealing ring.
A second aspect of the present disclosure provides a hole detection method.
A hole detection method using the hole detection device according to the first aspect of the present disclosure includes the following steps:
extending the second pipe fitting and the first rod piece wrapping the elastic memory air bag into the cavity;
continuously inflating the elastic memory air bag to ensure that the elastic memory air bag is fully expanded and is attached to the boundary of the karst cave, no air flows in when the elastic memory air bag is continuously pressurized, the memory air bag is considered to be fully attached to the karst cave when the elastic memory air bag reaches a steady state, and the inflation density and the inflation air volume are recorded;
the volume of the cavity is obtained by dividing the mass of inflation by the density of the gas measured by a densitometer inside the elastic memory balloon.
As possible realization modes, after the volume measurement is finished, gas in the air bag is extracted, the volume of the extracted gas is recorded, the air bag is taken out, and the gas with the same volume as the extracted gas is injected into the air bag after the air bag is taken out, so that the real size and shape of the karst cave can be restored.
A third aspect of the present disclosure provides a liquid-gas storage method.
A liquid-gas storage method using the cavity detection device of the first aspect of the present disclosure includes the following steps:
extending the second pipe fitting and the first rod piece wrapping the elastic memory air bag into the cavity;
continuously inflating the elastic memory air bag to ensure that the elastic memory air bag is fully expanded and is attached to the boundary of the karst cave, no air flows in when the elastic memory air bag is continuously pressurized, the memory air bag is considered to be fully attached to the karst cave when the elastic memory air bag reaches a steady state, and the inflation density and the inflation air volume are recorded;
dividing the gas density measured by a densimeter in the elastic memory air bag by the inflating mass to obtain the volume of the cavity;
after the volume measurement is finished, liquid or gas with the same volume as the cavity is filled into the air bag.
Compared with the prior art, the beneficial effect of this disclosure is:
1. according to the cavity detection device, the detection method and the liquid-gas storage method, the high-molecular memory air bag is adopted, the cavity boundary can be really memorized, and the accurate and rapid measurement of the volume and the shape of the cavity is realized.
2. The cavity detection device, the detection method and the liquid-gas storage method are simple and convenient to operate, and have obvious cost advantages compared with expensive detection equipment such as laser and sound waves.
3. The liquid-gas storage method enables the device to be used as a storage reservoir for urban emergency water, oil and liquefied gas, and has important strategic significance.
4. The cavity detection device, the detection method and the liquid-gas storage method can realize volume and boundary detection of complex cavities, and greatly improve the detection capability of the real situation of the cavities.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
Fig. 1 is a schematic structural diagram of a cavity quantitative probing apparatus provided in embodiment 1 of the present disclosure.
Fig. 2 is a schematic structural diagram of a seal ring provided in embodiment 1 of the present disclosure.
1. The device comprises an air pumping system, 2, an air pump, 3, a high-pressure air pump, 4, an air injection system, 5, a telescopic sleeve, 6, an air vent, 7, an elastic memory air bag, 8, an air bag probe, 9, an underground cavity, 10, a gas densimeter, 11, a gas flowmeter, 12 and a sealing ring.
Detailed Description
The present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only relational terms determined for convenience in describing structural relationships of the parts or elements of the present disclosure, and do not refer to any parts or elements of the present disclosure, and are not to be construed as limiting the present disclosure.
In the present disclosure, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and mean either a fixed connection or an integrally connected or detachable connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present disclosure can be determined on a case-by-case basis by persons skilled in the relevant art or technicians, and are not to be construed as limitations of the present disclosure.
The embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict.
Example 1:
as shown in fig. 1, an embodiment 1 of the present disclosure provides a cavity detecting device, including an air exhaust system 1, an air injection system 4, and a pipe fitting, where the pipe fitting includes a first pipe fitting and a second pipe fitting sleeved outside the first pipe fitting, one end of the pipe fitting is connected to the air exhaust system and/or the air injection system through a sealing member, and the other end of the pipe fitting is used to probe into an underground cavity 9;
one end of the first pipe fitting, which is used for penetrating into the cavity, is sleeved with an elastic memory air bag 7, and at least one vent hole is formed in the position, which is not penetrated into the cavity, of the second pipe fitting, so that air in the underground cavity 9 can escape under the extrusion.
In this embodiment, the seal is a sealing ring 12, as shown in FIG. 2.
In this implementation, the elastic memory airbag is sleeved and fixed on the outer side surface of the first pipe.
It will be appreciated that in other embodiments, a portion of the elastic memory bladder extends into the interior of the first tubular member and is secured to the inner sidewall of the first tubular member, and another portion extends out of the first tubular member.
The second pipe fitting is a telescopic sleeve 5, and the first pipe fitting is an air bag probe 8.
In this embodiment, one end of the retractable sleeve 5 extends into the cavity, and the other end of the retractable sleeve is connected with the sealing ring, so that the retractable sleeve has the functions of stabilizing the hole wall and exhausting air.
One end of the air bag probe 8 extends into the karst cave, and the other end of the air bag probe is connected with the sealing element, so that the air bag can conveniently enter and exit the karst cave and the sealing is easy.
In this embodiment, the airbag probe 8 may be a hard telescopic tube or an inflexible tube, and those skilled in the art can design the airbag probe according to specific working conditions.
The polymer elastic memory air bag has good elasticity, has good shape memory after contacting with a rock-soil body, can memorize the state of the air bag after deformation, has good compactness, and can be used for storing water, oil, liquefied gas and the like.
The high-pressure gas injection system 4 is connected with the high-molecular elastic memory air bag through the sealing ring, the sealing ring is opened, the high-molecular elastic memory air bag can be continuously inflated, the expansion of the high-pressure gas injection system is fully attached to the boundary of the karst cave, no gas flows in when pressurization is continued, the memory air bag and the karst cave are fully attached when a stable state is reached, and the density and the volume of the inflation gas are recorded at the moment.
The air pumping system is connected with the high-molecular elastic memory air bag through the sealing ring, and the air can be pumped into the cavity of the karst cave and the high-molecular elastic memory air bag continuously by opening the sealing ring.
The elastic memory air bag is a high-molecular elastic memory air bag, the specific material is a shape memory high-molecular, the shape memory high-molecular is a high-molecular material obtained by molecular combination and modification of general high-molecular materials by applying modern high-molecular physics theory and high-molecular synthesis and modification technology, such as polyethylene, polyisoprene, polyester, copolyester, polyamide, copolyamide, polyurethane and other high-molecular materials, molecular design and molecular structure adjustment are carried out, so that the high-molecular materials are endowed with a certain shape (initial state) under a certain condition, and when external conditions change, the shape can be correspondingly changed and fixed (deformed state). If the external environment changes again in a specific way and regularly, they can be reversibly restored to the initial state. At this point, the cycle of memory initial state-fixed morphism-recovery initial state is completed.
In this embodiment, the first and second pipe elements are coaxially arranged.
It is understood that in other embodiments, the first pipe and the second pipe may not be coaxial, as long as the sleeving of the two pipes is achieved.
And a gas densimeter and a cable are arranged in the elastic memory air bag, and the cable penetrates out through the first pipe fitting.
Air exhaust system includes aspiration pump 2, gas densimeter 10 and gas flowmeter 11, the gas injection system includes high-pressure pump 3, gas densimeter 10 and gas flowmeter 11, aspiration pump and pump all communicate through the tip of keeping away from the cavity of pipeline and sealing member and second pipe fitting.
Example 2:
an embodiment 2 of the present disclosure provides a hole detection method, where, with the use of the hole detection device provided in embodiment 1, the method includes the following steps:
(1) the probe tube and the sleeve tube which is wrapped with the macromolecule elastic memory air bag are deeply inserted into the karst cave.
(2) Closing the sleeve sealing ring, opening the probe sealing ring, starting the high-pressure gas injection system, continuously inflating the polymer elastic memory airbag to ensure that the polymer elastic memory airbag is fully expanded and is fully attached to the boundary of the cavern, no gas flows in when the pressurization is continued, considering that the memory airbag is fully attached to the cavern at the moment when the steady state is reached, and recording the inflation density and the inflation gas volume at the moment.
(3) Considering that the injection of high-pressure gas may be compressed, causing the measured value to be too large, the correction is made according to the principle of conservation of mass:
and (3) the inflation quality: and M1 is rho 1 and V1, M2 is rho 2 and V2, M1 is M2, and V2 is M1/rho 2, so that the true karst cave volume can be obtained.
Wherein rho 1 and V1 are density and volume of injected gas, and can be measured by a gas densimeter and a flowmeter, and rho 2 is the real gas density measured in the air bag.
(4) After the calculation and measurement are finished, extracting gas in the air bag through the air bag probe, recording the volume of the extracted gas, and taking out the air bag;
because the air bag has memory, the air bag can restore the real size form of the karst cave after being taken out and injected with gas with the same volume.
Example 3:
the embodiment 3 of the present disclosure provides a liquid-gas storage method, which uses the cavity detection device described in the embodiment 1 of the present disclosure to measure the volume of a karst cave and serve as a storage reservoir for urban emergency water, oil and gas, and includes the following steps:
(1) the probe tube and the sleeve tube which is wrapped by the macromolecule elastic memory air bag are deeply inserted into the karst cave.
(2) Closing the sleeve sealing ring, opening the probe sealing ring, starting the high-pressure gas injection system, continuously inflating the polymer elastic memory airbag to ensure that the polymer elastic memory airbag is fully expanded and is fully attached to the boundary of the cavern, no gas flows in when the pressurization is continued, considering that the memory airbag is fully attached to the cavern at the moment when the steady state is reached, and recording the inflation density and the inflation gas volume at the moment.
(3) Considering that the injection of high-pressure gas may be compressed, causing the measured value to be too large, the correction is made according to the principle of conservation of mass:
and (3) the inflation quality: and M1 is rho 1 and V1, M2 is rho 2 and V2, M1 is M2, and V2 is M1/rho 2, so that the true karst cave volume can be obtained.
Wherein rho 1 and V1 are density and volume of injected gas, and can be measured by a gas densimeter and a flowmeter, and rho 2 is the real gas density measured in the air bag.
(4) After the calculation and measurement are finished, urban emergency water, oil, gas and the like are filled into the air bag through the air bag probe tube, and the air bag has good tightness, so that the air bag can be used as a storage warehouse for the urban emergency water, oil and gas;
(5) sealing the sealing ring and properly managing.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (10)
1. A cavity detection device is characterized by comprising an air extraction module, an air injection module and a pipe fitting, wherein the pipe fitting comprises a first pipe fitting and a second pipe fitting sleeved on the outer side of the first pipe fitting, one end of the pipe fitting is connected with the air extraction module and/or the air injection module through a sealing piece, the other end of the pipe fitting is used for extending into a cavity, the air extraction module comprises a gas densimeter and a gas flowmeter, and the air injection module comprises a gas densimeter and a gas flowmeter;
one end of the first pipe fitting, which is used for penetrating into the cavity, is sleeved with an elastic memory air bag, and at least one vent hole is formed in the position, which is not penetrated into the cavity, of the second pipe fitting.
2. The cavity detecting device according to claim 1, wherein the first and/or second tube member is a bellows.
3. The cavity detection apparatus of claim 1, wherein the elastic memory balloon is a polymeric elastic memory balloon.
4. The cavity detecting device of claim 1, wherein the first tube member and the second tube member are coaxially disposed.
5. The void detection device of claim 1, wherein a gas density gauge and a cable are disposed within the elastic memory balloon, the cable extending through the first tube.
6. The void detection device of claim 1, wherein the pump module further comprises a pump and the insufflation module further comprises an inflator pump, both of which are in communication with an end of the second tube member distal from the void via a conduit and a seal.
7. The void detection device of claim 1, wherein the seal is a sealing ring.
8. A hole detection method using the hole detection device according to any one of claims 1 to 7, comprising the steps of:
extending the second pipe fitting and the first rod piece wrapping the elastic memory air bag into the cavity;
continuously inflating the elastic memory air bag to ensure that the elastic memory air bag is fully expanded and is attached to the boundary of the karst cave, no air flows in when the elastic memory air bag is continuously pressurized, the memory air bag is considered to be fully attached to the karst cave when the elastic memory air bag reaches a steady state, and the inflation density and the inflation air volume are recorded;
the volume of the cavity is obtained by dividing the mass of inflation by the density of the gas measured by a densitometer inside the elastic memory balloon.
9. A void detection method as claimed in claim 8, wherein after the volume measurement is completed, the gas in the bladder is extracted, the volume of the extracted gas is recorded, the bladder is removed, and the true size of the cavern is restored by injecting the removed bladder with the same volume of gas as the extracted gas.
10. A liquid-gas storage method using the void detection device according to any one of claims 1 to 7, comprising the steps of:
extending the second pipe fitting and the first rod piece wrapping the elastic memory air bag into the cavity;
continuously inflating the elastic memory air bag to ensure that the elastic memory air bag is fully expanded and is attached to the boundary of the karst cave, no air flows in when the elastic memory air bag is continuously pressurized, the memory air bag is considered to be fully attached to the karst cave when the elastic memory air bag reaches a steady state, and the inflation density and the inflation air volume are recorded;
dividing the gas density measured by a densimeter in the elastic memory air bag by the inflating mass to obtain the volume of the cavity;
after the volume measurement is finished, liquid or gas with the same volume as the cavity is filled into the air bag.
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