Gas extraction drill hole plugging body compactness detection device
By providing a detection device including a detection rod, a pressure plate, an acceleration sensor, a force hammer and a non-destructive detector, the problem of difficulty in scientifically and accurately detecting the compactness of the gas extraction drilling sealing body in the prior art is solved, and the problem of the difficulty of scientifically and accurately detecting the compactness of the gas extraction drilling hole is achieved. The accurate judgment of the sealing effect and air leakage point reduces the detection cost and improves efficiency.
Patent Information
- Application Number
- CN202411803317.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-02-11
AI Technical Summary
The prior art is difficult to scientifically and accurately detect the compactness of the gas extraction drilling sealing body, especially when judging the sealing effect and the air leakage point.
Provide a detection device including a detection rod, a pressure plate, an acceleration sensor, a force hammer and a non-destructive detector. Through the point contact between the detection rod and the sealing body and the non-destructive detection principle, combined with the signal acquisition of the acceleration sensor and the force hammer, non-destructive detection is used. The instrument conducts automatic analysis to determine compactness.
It realizes scientific and accurate detection of the compactness of the gas extraction drilling sealing body, and can accurately judge the sealing effect and air leakage point, reducing the detection cost and improving the detection efficiency.
Smart Images
Figure CN119412030A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of compactness detection, and in particular to a compactness detection device for a gas extraction borehole plugging body. Background Art
[0002] The density of the gas extraction borehole plugging body in coal mines is a key factor affecting the gas extraction and sudden elimination effects, and plays a very critical role in coal mine safety production. The gas extraction process includes three steps: drilling, plugging, and extraction, and the quality of the plugging seriously affects the extraction effect. The plugging holes are usually sealed with bags at both ends, and the gaps in the middle bag are sealed with cement or polyurethane. The density of the plugging body will not only affect the extraction efficiency and production progress, but also threaten the safety of life and property. Therefore, a detection device is needed to detect the density of the gas extraction borehole plugging body.
[0003] At present, the density test of gas extraction borehole plugging body generally uses underground compressed air to fill the borehole and manually observe the pressure change to judge the density of the borehole; some people also proposed to use a detection tube to extend into the borehole to judge the density by the gas concentration at different positions in the borehole and the extraction negative pressure. However, these methods for judging the density of the sealing hole are complicated to operate and have poor scientificity. It is difficult to intuitively and accurately judge the sealing effect. If the sealing effect is poor, it is difficult to determine the leakage point and it is impossible to perform a second sealing. Summary of the invention
[0004] The purpose of the present invention is to provide a gas extraction borehole sealing body compactness detection device to solve the problems existing in the above-mentioned prior art, so that the detection of the density of the borehole sealing body is scientific and accurate, and the sealing effect and leakage point can be accurately judged.
[0005] To achieve the above object, the present invention provides the following solutions:
[0006] The present invention provides a gas extraction borehole sealing body density detection device, comprising a detection rod, a pressure plate, an acceleration sensor, a force hammer and a non-destructive detector, the edge of the pressure plate is fixedly connected to the detection surface by an anchor rod, the detection rod passes through the detection hole on the pressure plate and is inserted into the borehole, the inner end of the detection rod is in contact with the outer bag sealing body, and the outer end is connected to the acceleration sensor, the force hammer is used to strike the outer end of the detection rod, and the acceleration sensor and the force hammer are communicatively connected to the non-destructive detector.
[0007] Preferably, the detection rod includes a touch rod, an extension rod and an excitation receiving rod which are connected in sequence by threads, the front end of the touch rod is a cone and is in point contact with the outer bag, and the outer diameters of the touch rod, the extension rod and the excitation receiving rod are equal.
[0008] Preferably, the outer diameters of the contact rod, the extension rod and the excitation receiving rod are all φ36 mm, and the front ends of the extension rod and the excitation receiving rod are both set as φ20 mm studs.
[0009] Preferably, the length of the touch rod is 1 m, the length of the extension rod is 0.5 m-2 m, and the length of the excitation receiving rod is 0.8 m.
[0010] Preferably, the surface of the excitation receiving rod is provided with an external thread, and the external thread is used to connect a nut, and the nut fits the pressure plate.
[0011] Preferably, the length of the pressing plate is at least greater than the diameter of one of the drill holes, and the detection hole covers at least two of the drill holes.
[0012] Preferably, the pressing plate has a width of 10 cm and a thickness of 10 mm, and the pressing plate is made of steel plate.
[0013] Preferably, anchor rod fixing holes are arranged on both sides of the pressure plate, and the detection hole is arranged in the middle, and both the anchor rod fixing holes and the detection hole are rectangular long holes and are vertically oriented.
[0014] Preferably, the rectangular long hole has a length of 6 cm and a width of 38 mm, and at least one detection hole is provided.
[0015] Preferably, a nut is connected to the outer end of the anchor rod, and the nut is located on the outer side of the pressure plate and can fix the pressure plate.
[0016] Compared with the prior art, the present invention has achieved the following technical effects:
[0017] The invention has a reasonable structure and is easy to operate. On the basis of not destroying the gas extraction sealing hole, the compactness of the sealing body is obtained by using the principle of non-destructive testing, which greatly reduces the testing cost, improves the testing efficiency, and is convenient for operators to use. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 This is a structural diagram of the use of a gas extraction borehole plugging body compactness detection device in an embodiment of the present invention;
[0020] Figure 2 It is a structural diagram of the explosion structure of the detection rod in the embodiment of the present invention;
[0021] Figure 3 It is a structural schematic diagram of a pressing plate in an embodiment of the present invention;
[0022] In the figure: 1-detection rod, 101-touch rod, 102-extension rod, 103-excitation receiving rod, 2-acceleration sensor, 3-force hammer, 4-pressure plate, 41-anchor fixing hole, 42-detection hole, 5-nut, 6-anchor, 7-inner bag sealing body, 8-outer bag sealing body, 9-inter-bag sealing body, 10-nondestructive testing instrument. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0024] The purpose of the present invention is to provide a gas extraction borehole sealing body compactness detection device to solve the problems existing in the prior art, so that the borehole sealing body compactness detection is scientific and accurate, and the sealing effect and leakage point can be accurately judged.
[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.
[0026] Embodiment 1
[0027] like Figures 1 to 3 As shown, in this embodiment, a gas extraction borehole plugging body density detection device is provided, including a detection rod 1, a pressure plate 4, an acceleration sensor 2, a force hammer 3 and a non-destructive detector 10. The edge of the pressure plate 4 is fixedly connected to the detection surface by an anchor rod 6. The detection rod 1 passes through the detection hole on the pressure plate 4 and is inserted into the borehole. The inner end of the detection rod 1 is in contact with the outer bag plugging body, and the outer end is connected to the acceleration sensor 2. The force hammer 3 is used to knock the outer end of the detection rod 1. The acceleration sensor 2 and the force hammer 3 are connected to the non-destructive detector 10 for communication. In this embodiment, the acceleration sensor 2 is connected to the non-destructive detector 10 through a signal transmission data cable. Using the principle of non-destructive testing, the non-destructive detector 10 obtains the density of the plugging body based on the automatic analysis of professionals and the system.
[0028] As an optional solution, the detection rod 1 in this embodiment includes a touch rod 101, an extension rod 102 and an excitation receiving rod 103 which are connected in sequence by threads. The front end of the touch rod 101 is a cone and is basically in point contact with the outer bag. The outer diameters of the touch rod 101, the extension rod 102 and the excitation receiving rod 103 are equal. If a significant change in resistance is sensed during the movement of the touch rod 101, it means that the point contact position has been found. When the pressure increases, if the object or surface touched is prone to significant deformation (such as a soft bag body), and the operator still senses that the contact point is in the same position and the contact area has not increased significantly, it also means that the point contact position has been found. When the tip of the cone contacts the outer bag, the contact area is the smallest, so that a higher pressure or force can be concentrated on the contact point, which is suitable for occasions where precise positioning or force application is required; due to the small contact area, the point contact can more sensitively sense the vibration or other small changes of the external bag, which is suitable for precision measurement or detection applications. The local deformation of the outer bag is smaller when it is subjected to point contact, which is conducive to maintaining the integrity of the structure; when gently sliding on the contact surface, the point contact will produce a local and obvious friction feeling, while the friction feeling of the surface contact will be more uniform.
[0029] As an optional solution, in this embodiment, the outer diameters of the touch rod 101, the extension rod 102 and the excitation receiving rod 103 are all φ36 mm, and the front ends of the extension rod 102 and the excitation receiving rod 103 are both set as φ20 mm studs.
[0030] As an optional solution, in this embodiment, the length of the feeler rod 101 is 1m, the length of the extension rod 102 is 0.5m-2m, and the length of the excitation receiving rod 103 is 0.8m. Generally, when in use, the feeler rod 101 and the extension rod 102 are both driven into the plugging body located in the drilled hole, so that the front end of the feeler rod 101 is a cone and is in point contact with the outer bag.
[0031] As an optional solution, in this embodiment, the surface of the excitation receiving rod 103 is provided with an external thread, which is used to connect the nut 5, and the nut 5 is attached to the pressure plate 4. When the excitation hammer hits the outer end of the excitation receiving rod 103, a stress wave signal is generated, and the acceleration sensor 2 is adsorbed on the outer end of the excitation receiving rod 103 by magnetic force to receive the signal.
[0032] As an optional solution, in this embodiment, the length of the pressing plate 4 is at least greater than the diameter of one drill hole, and the detection hole covers at least one drill hole.
[0033] As an optional solution, in this embodiment, the width of the pressing plate 4 is 10 cm and the thickness is 10 mm. The material of the pressing plate 4 includes but is not limited to steel plate.
[0034] As an optional solution, in this embodiment, anchor rod 6 fixing holes are set on both sides of the pressure plate 4 and a detection hole is set in the middle. The anchor rod 6 fixing holes and the detection holes are both rectangular long holes and are perpendicular to each other, which is convenient for adjusting the position of the pressure plate 4 according to the distance between the drilled hole and the adjacent anchor rod 6 to better fix the detection rod.
[0035] As an optional solution, the rectangular long hole in this embodiment has a length of 6 cm and a width of 38 mm, and at least one detection hole is provided. In this embodiment, both the detection hole and the fixing hole have a surplus length and are adjustable, so only one detection point needs to be set. Preferably, one detection hole is provided. During operation, several detection devices can be installed at the same time and detection can be performed in sequence. Alternatively, one detection device can be used, disassembled, and installed at another detection point for detection.
[0036] As an optional solution, in this embodiment, the outer end of the anchor rod 6 is connected with a nut 5 , and the nut 5 is located on the outer side of the pressing plate 4 and can fix the pressing plate 4 .
[0037] Embodiment 2
[0038] The specific use method and working principle of the gas extraction borehole plugging body compactness detection device in this embodiment are as follows:
[0039] The gas extraction borehole adopts the "two plugging and one injection" sealing process. Taking the upward hole sealing as an example, after the grouting is completed, an inner bag sealing body 7, an outer bag sealing body 8 and an inter-bag sealing body 9 are formed in the borehole. In order to detect the compactness of the sealing body, the length of the detection rod 1 is first determined according to the position of the outer bag blocking body 8. In this embodiment, the distance between the outer bag and the outermost end of the borehole is 2m, so the detection rod 1 needs to use an extension rod 102 to assemble the detection rod 1. The touch rod 101, the extension rod 102, and the excitation receiving rod 103 are fixedly connected by threads at the head and tail, and the pressure plate 4 is installed. The left long slit of the pressure plate 4 passes through the borehole adjacent to the left anchor rod 6, and the right long slit of the pressure plate 4 passes through the borehole adjacent to the right anchor rod 6. Then the detection rod 1 is passed through the middle long slit of the pressure plate 4, and the anchor rod 6 and the detection rod 1 are tightened with the nut 5 to ensure that the cone at the front end of the detection rod 1 is in point contact with the outer bag. A magnetic acceleration sensor 2 is attached to the exposed end of the detection rod 1, and a force hammer 3 is used to knock the exposed end of the detection rod 1. The non-destructive testing instrument 10 collects signals. After the technicians and the non-destructive testing instrument 10 process the signals, the compactness of the gas drilling hole sealing is obtained.
[0040] The acceleration sensor 2, the force hammer 3 and the nondestructive testing instrument 10 are connected through a signal transmission data line. The force hammer 3 hits the outer end of the detection rod 1, and a stress wave signal is generated when the outer end of the exciting receiving rod 103 is excited. The acceleration sensor 2 is adsorbed on the outer end of the exciting receiving rod 103 by magnetic force to receive the signal. The propagation characteristics of sound waves in the drilling plugging body are used to detect the defects inside the drilling plugging body. When the sound waves encounter defects (cracks, cavities) in the drilling plugging body, reflection, refraction and scattering phenomena will occur. By receiving the reflected sound wave signal, it can be determined whether there are defects inside the drilling plugging body. Using the principle of nondestructive testing, the nondestructive testing instrument derives the compactness of the plugging body based on the automatic analysis of professionals and the system.
[0041] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as limiting the present invention.
Claims
1. A gas extraction borehole plugging body compactness detection device, characterized in that: It includes a detection rod, a pressure plate, an acceleration sensor, a force hammer and a non-destructive testing instrument. The edge of the pressure plate is fixedly connected to the detection surface by an anchor rod. The detection rod passes through the detection hole on the pressure plate and is inserted into the drilled hole. The inner end of the detection rod is in contact with the outer bag sealing body, and the outer end is connected with the acceleration sensor. The force hammer is used to strike the outer end of the detection rod. The acceleration sensor and the force hammer are communicatively connected with the non-destructive testing instrument.
2. The gas extraction borehole plugging body compactness detection device according to claim 1, characterized in that: The detection rod comprises a touch rod, an extension rod and an excitation receiving rod which are connected in sequence by threads. The front end of the touch rod is a cone and is in point contact with the outer bag. The outer diameters of the touch rod, the extension rod and the excitation receiving rod are all equal.
3. The gas extraction borehole plugging body compactness detection device according to claim 2, characterized in that: The outer diameters of the contact rod, the extension rod and the excitation receiving rod are all φ36 mm, and the front ends of the extension rod and the excitation receiving rod are both set as φ20 mm studs.
4. The gas extraction borehole plugging body compactness detection device according to claim 2, characterized in that: The length of the touch rod is 1 m, the length of the extension rod is 0.5 m-2 m, and the length of the excitation receiving rod is 0.8 m.
5. The gas extraction borehole plugging body compactness detection device according to claim 2, characterized in that: The surface of the excitation receiving rod is provided with an external thread, and the external thread is used to connect a nut, and the nut fits the pressure plate.
6. The gas extraction borehole plugging body compactness detection device according to claim 1, characterized in that: The length of the pressing plate is at least greater than the diameter of one of the drill holes, and the detection hole covers at least two of the drill holes.
7. The gas extraction borehole plugging body compactness detection device according to claim 1, characterized in that: The width of the pressing plate is 10 cm and the thickness is 10 mm, and the material of the pressing plate includes a steel plate.
8. The gas extraction borehole plugging body compactness detection device according to claim 1, characterized in that: Anchor rod fixing holes are arranged on both sides of the pressure plate, and the detection hole is arranged in the middle. The anchor rod fixing holes and the detection holes are both rectangular long holes and are perpendicular in direction.
9. The gas extraction borehole plugging body compactness detection device according to claim 8, characterized in that: The rectangular long hole has a length of 6 cm and a width of 38 mm, and at least one detection hole is provided.
10. The gas extraction borehole plugging body compactness detection device according to claim 1, characterized in that: The outer end of the anchor rod is connected to a nut, which is located on the outside of the pressure plate and can fix the Pressure plate.