A device for detecting air leakage from a borehole seal

Abstract

The utility model discloses a device for detecting drilling hole sealing and air leakage, including U type differential pressure gauge, U type differential pressure gauge is the head end seal, the U type pipe of end opening, U type differential pressure gauge end connects rubber hose, and rubber hose connects drilling hole sealing, and U type differential pressure gauge is filled with liquid and liquid does not reach U type differential pressure gauge head end. Through the both ends of soft rubber tube are connected respectively drilling field observation hole and U type differential pressure gauge, and the internal negative pressure of drilling hole is formed with the atmospheric pressure of outside after closing the valve, and the pressure difference is materialized through U type differential pressure gauge, judges whether the drilling hole of being detected is sealed and leaks, solves the problem that current gas cannot be detected directly whether slowly leaks, so that the gas management is convenient, and the security is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of coal mine borehole detection equipment, specifically relating to a device for detecting air leakage in borehole sealing. Background Technology

[0002] Currently, the methods for detecting gas leaks in mine drilling are limited, relying on manual observation and solvent foaming methods, which are extremely ineffective. They cannot detect most slow or minor leaks, resulting in low gas extraction concentrations. Furthermore, the concentration decays rapidly after drilling, making it impossible to achieve high-concentration, long-term extraction. This severely restricts the effectiveness of gas control and the advancement of refined extraction management, creating numerous adverse factors for mine gas control and other related aspects. Utility Model Content

[0003] The purpose of this invention is to provide a device for detecting air leakage in borehole sealing, solving the current problem of the inability to effectively detect slow and slight air leakage in sealed boreholes, and improving the safety of gas control.

[0004] The technical solution adopted by this utility model is a device for detecting air leakage in borehole sealing, including a U-shaped differential pressure gauge. The U-shaped differential pressure gauge is a U-shaped tube with a sealed head and an open tail. The end of the U-shaped differential pressure gauge is connected to a rubber hose, which is connected to the borehole sealing. The U-shaped differential pressure gauge is filled with liquid, but the liquid does not reach the head of the U-shaped differential pressure gauge.

[0005] Furthermore, it also includes a back plate, on the front of which a groove is opened corresponding to the U-shaped differential pressure gauge. The U-shaped differential pressure gauge is embedded in the back plate through the groove and fixedly connected to the back plate. The head and tail of the U-shaped differential pressure gauge extend beyond the top of the back plate by a set distance.

[0006] Furthermore, the thickness of the aforementioned backplate is 30-40mm, the height is 470-480mm, and the length is 100-120mm.

[0007] Furthermore, the diameter of the aforementioned U-shaped differential pressure gauge is 5-8 mm, and its height is 490-500 mm.

[0008] Furthermore, the U-shaped differential pressure gauge has a scale near its head.

[0009] Compared with existing technologies, the beneficial effects of this utility model are that, in the work of detecting the quality of borehole sealing, the two ends of the soft rubber tube are connected to the drilling site observation hole and the U-shaped differential pressure gauge respectively. After the valve is closed, the borehole has its own negative pressure and forms a pressure difference with the external atmospheric pressure. The pressure difference is visualized by the U-shaped differential pressure gauge. The rate of change of the liquid level difference in the U-shaped differential pressure gauge can be recorded by a stopwatch. According to the established technical standards, it can be determined whether the borehole being tested is leaking gas. This solves the problem that it is currently impossible to effectively detect whether the sealed borehole is slowly leaking or slightly leaking gas, thereby improving the gas control effect and the refined management of gas extraction.

[0010] This invention features a simple structure and convenient operation, addressing the previous inability to detect slow or slight air leakage in borehole sealing. It compares the detected borehole with a standard to determine the degree of leakage, maximizing the detection of borehole sealing quality. This allows for comparison of sealing methods and depths suitable for each mine, improving borehole sealing quality and providing a foundation for high-concentration pre-extraction. Attached Figure Description

[0011] Figure 1 A front view of a device for detecting air leakage in borehole sealing. Figure 2 A side view of a device for detecting air leakage in borehole sealing. Figure 3 A top view of a device for detecting air leakage in borehole sealing. Detailed Implementation

[0012] The present invention will be further explained below with reference to the accompanying drawings to enable those skilled in the art to better understand it.

[0013] Example 1 like Figure 1-3 As shown, a device for detecting leaks in borehole sealing includes a U-shaped differential pressure gauge 1, which is a U-shaped tube with a sealed head and an open tail. A rubber hose 2 is connected to the end of the U-shaped differential pressure gauge 1, and the rubber hose 2 is connected to the borehole sealing. The U-shaped differential pressure gauge 1 is filled with liquid, but the liquid level does not reach the head of the gauge. In the process of detecting borehole sealing quality, the two ends of the hose are connected to the drilling site observation hole and the U-shaped differential pressure gauge 1, respectively. After the valve is closed, the borehole has its own negative pressure, creating a pressure difference with the external atmospheric pressure. This pressure difference is visualized by the U-shaped differential pressure gauge 1. The rate of change of the liquid level in the gauge can be recorded using a stopwatch. Based on the established technical standards, it can be determined whether the borehole being tested is leaking, solving the problem of not being able to directly detect slow or slight leaks in borehole sealing.

[0014] Furthermore, it also includes a back plate 3. A groove is cut into the front of the back plate 3 corresponding to the U-shaped differential pressure gauge 1. The U-shaped differential pressure gauge 1 is fixedly connected to the back plate 3 by embedding it into the groove. This connection can be achieved by bonding or welding. Both the head and tail of the U-shaped differential pressure gauge 1 extend beyond the top of the back plate 2 by a predetermined distance, facilitating the connection of the rubber hose 2. The back plate has a thickness of 30-40mm, a height of 470-480mm, and a length of 100-120mm. The U-shaped differential pressure gauge has a diameter of 5-8mm and a height of 490-500mm. Using the back plate as a mounting carrier for the U-shaped differential pressure gauge 1 facilitates its transport and storage, prevents damage, maintains the stability of the gauge, and allows for easy monitoring of liquid level changes.

[0015] To facilitate monitoring of liquid level changes within the U-shaped differential pressure gauge 1, a scale 4 is provided near the head end of the gauge. The pressure range is preferentially determined by examining boreholes with relatively good extraction performance, serving as a basis for establishing testing standards. The tested boreholes are compared with these standards to determine the degree of leakage. This maximizes the detection of borehole sealing quality, allowing for comparison of sealing methods and depths suitable for the mine, thus improving borehole sealing quality and providing a foundation for high-concentration pre-extraction.

[0016] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from its design spirit and principles should fall within the protection scope defined by the claims of the present invention.

Claims

1. A device for detecting air leakage in borehole sealing, characterized in that, Includes a U-shaped differential pressure gauge (1), which is a U-shaped tube with a sealed head and an open end. The end of the U-shaped differential pressure gauge (1) is connected to a rubber hose (2), which is connected to a drilled and sealed hole. The U-shaped differential pressure gauge (1) is filled with liquid, but the liquid does not reach the top of the head of the U-shaped differential pressure gauge (1).

2. The device for detecting air leakage in borehole sealing according to claim 1, characterized in that, It also includes a back plate (3), on the front of which a groove is opened corresponding to the U-shaped differential pressure gauge (1). The U-shaped differential pressure gauge (1) is embedded in the back plate (3) through the groove and fixedly connected to the back plate (3). The head and end of the U-shaped differential pressure gauge (1) extend out of the top of the back plate (3) by a set distance.

3. The device for detecting air leakage in borehole sealing according to claim 2, characterized in that, The backplate (3) has a thickness of 30-40mm, a height of 470-480mm, and a length of 100-120mm.

4. The device for detecting air leakage in borehole sealing according to claim 1, characterized in that, The U-shaped differential pressure gauge (1) has a tube diameter of 5-8 mm and a height of 490-500 mm.

5. The device for detecting air leakage in borehole sealing according to claim 1, characterized in that, The U-shaped differential pressure gauge (1) has a scale (4) near the head end.

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