Gas inspection device

Abstract

The utility model discloses a gas inspection device, which is used for solving the technical problem of accurately inspecting gas in a drill hole when water and gas coexist in an upward drill hole, and belongs to the technical field of drill hole gas inspection. The device comprises a monitoring steel pipe, a sampling hole is formed in the pipe wall of the monitoring steel pipe, the monitoring steel pipe comprises a vent pipe, the vent pipe is L-shaped, namely, the vent pipe comprises a vertical section and a horizontal section, a conical cover is supported at the tail end of the vertical section through a support, the vertical section extends into the conical cover, and the horizontal section extends into the conical cover. The horizontal section penetrates through the sampling hole and is connected with a differential pressure gauge.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of drilling gas inspection, and particularly relates to a kind of gas inspection devices used in coal mine. BACKGROUND

[0002] In the process of stoping and tunneling, the water and gas accumulation in the overlying goaf should be timely investigated. The most common direct method is to investigate by drilling in the current layer. However, due to the coexistence of water and gas in some drills, the existing gas monitoring and differential pressure observation method will cause large differential pressure data error due to the existence of water, and even cannot investigate the gas condition. Therefore, a special investigation method for water and gas coexisting drill is needed to better master the gas accumulation condition in the overlying goaf. UTILITY MODEL CONTENT

[0003] The utility model aims at providing a kind of gas inspection device, which is used to solve the technical problem of accurately inspecting the gas in the upward drill when water and gas coexist in the drill.

[0004] The utility model is implemented by the following technical scheme:

[0005] A kind of gas inspection device, including monitoring steel pipe, sampling hole is set up on the monitoring steel pipe wall, the detection steel pipe includes vent pipe, the vent pipe is L type, i.e. the vent pipe includes vertical section and horizontal section, the vertical section end is supported with conical cover by support, the vertical section extends into conical cover, the horizontal section is connected with differential pressure gauge through sampling hole.

[0006] When applied, the vent pipe passes through the sampling hole of the monitoring steel pipe, the conical cover is vertically upwards, the conical cover is reserved a certain distance from the vent hole by the support, one end of the monitoring steel pipe is connected with the hole sealer, the conical cover extends into the hole sealer, the other end is connected with the intercept door;The vent pipe exposed from the sampling hole is connected with the water needle, the water needle is connected with the differential pressure gauge, when used, the water in the hole sealer is isolated by the conical cover, only gas can enter the vent pipe from the conical cover, and then the size of the gas pressure in the hole sealer can be known through the differential pressure gauge.

[0007] Further preferably, the differential pressure gauge is a U-shaped differential pressure gauge.

[0008] Further preferably, one end of the horizontal section is connected with the water needle, and the other end of the water needle is connected with the U-shaped differential pressure gauge.

[0009] Further preferably, the water needle is fixedly connected with the horizontal section and the differential pressure gauge respectively.

[0010] Further preferably, it further includes an extension pipe, the horizontal section and the vertical section are threadedly connected through a 90-degree elbow, one end of the extension pipe is threadedly connected with the 90-degree elbow, and the other end is threadedly connected with the vertical section.

[0011] Further preferably, the diameter of the conical cover is not more than the inner diameter of the hole sealer.

[0012] Further preferably, the monitoring steel pipe is provided with flanges at both ends, and one end of the monitoring steel pipe is connected with the hole sealer, and the other end is connected with a cut-off door, and the cut-off door is connected with a water return bend.

[0013] The utility model can realize complete gas-water separation, can not only directly reflect the overlying goaf gas condition and air pressure condition, but also completely does not influence water exploration and drainage work, realizes the purpose of gas-water separation monitoring and treatment. BRIEF DESCRIPTION OF DRAWINGS

[0014] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments that are in accordance with the present utility model, and together with the description, serve to explain the principle of the utility model.

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced, and obviously, other drawings can be obtained by the drawings for the ordinary skilled in the art without creative labor.

[0016] Figure 1 The utility model structure schematic diagram is shown.

[0017] In the drawing: 1-monitoring steel pipe, 11-ventilation pipe, 12-conical cover, 2-water needle, 3-U type differential pressure gauge, 4-hole sealer, 5-cut-off door, 6-water return bend. DETAILED DESCRIPTION

[0018] In order to more clearly illustrate the above purpose, features and advantages of the utility model, the scheme of the utility model will be further described below.It needs to be explained that the embodiment of the utility model and the features in the embodiment can be combined with each other without conflict.

[0019] In the description, it needs to be explained that the terms "first", "second" are only for the purpose of description, and can not be understood as indicating or implying relative importance.It needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integrally connected, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements.The above terms can be understood according to the specific meaning of the specific circumstances for the ordinary skilled in the art.

[0020] Many specific details are set forth in the following description in order to provide a thorough understanding of the present application. However, the present application can be practiced according to other embodiments that can not be described in detail herein.

[0021] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0022] A gas inspection device, comprising a monitoring steel pipe 1, the monitoring steel pipe 1 is provided with a sampling hole on the pipe wall, the monitoring steel pipe comprises a breather pipe 11, the breather pipe 11 is L-shaped, that is, the breather pipe 11 comprises a vertical section and a horizontal section, the vertical section is supported by a support at the end of the vertical section with a conical cover 12, the vertical section extends into the conical cover 12, the horizontal section is connected with a water needle 2 through the sampling hole, and the water needle 2 is connected with a differential pressure meter.

[0023] The water needle 2 is fixedly connected with the horizontal section and the differential pressure meter respectively, and in the embodiment, the water needle is fixedly connected by welding. The form of the support in the embodiment is that three supporting pieces are welded on the outer wall of the pipe opening of the breather pipe 11 and the inner side of the conical cover 12 respectively, the conical cover 12 is supported on the pipe opening of the breather pipe 11 in the form of a claw, and it should be noted that there should be a gap between the conical cover 12 and the pipe opening of the breather pipe 11, otherwise the gas cannot enter from the pipe opening of the breather pipe 11.

[0024] The differential pressure meter in the embodiment is a U-shaped differential pressure meter 3. The horizontal section of the breather pipe 11 is connected with the U-shaped differential pressure meter 3 through the water needle 2, and the connection can also be realized through the remaining connecting pipes.

[0025] It should be noted that in the actual use process, if the vertical section of the breather pipe 11 is not long enough, a lengthening pipe can also be connected, the horizontal section and the vertical section are threadedly connected through a 90-degree elbow, one end of the lengthening pipe is threadedly connected with the 90-degree elbow, and the other end is threadedly connected with the vertical section.

[0026] In order to prevent water from flowing back into the breather pipe 11 from the conical cover 12, the diameter of the conical cover 12 can be made as large as possible, and the diameter of the conical cover 12 is not more than the inner diameter of the hole sealing device 4.

[0027] In use, the monitoring steel pipe 1 is provided with flanges at both ends, one end of the monitoring steel pipe 1 is connected with the hole sealing device 4, the other end is connected with a cut-off door 5, and the cut-off door 5 is connected with a water return bend 6.

[0028] Working principle:

[0029] In order to strengthen the water isolation effect of the conical cover 12, the principle of fluid mechanics should be fully combined. Part of the water will form a low-speed fluid on the surface of the conical cover 12 due to the long-term falling process through the conical cover 12. The low-speed fluid will slowly penetrate into the air pipe, which will cause errors in gas inspection and air pressure inspection. Therefore, according to the actual application situation, in order to deal with the gas inspection of larger water flow, the diameter of the conical cover 12 is increased to avoid water entering the air pipe 11.

[0030] Due to the continuous strengthening of water exploration and drainage work, the situation of full pipe (hole sealing device 4) with a large amount of water is less. Most of the drilling holes exist in the form of gas and water. The utility model has strong popularization significance and use value. It does not delay the water exploration and drainage work, and provides accurate data for detailed exploration of overburden goaf gas and detailed exploration of gas pressure. It also clarifies the direction and method for the next step of overburden gas management.

[0031] The utility model adds a section of monitoring steel pipe 1 and supports a conical cover 12 to realize gas-water separation. After gas-water separation, the drainage efficiency is not affected, and no errors are caused in gas inspection and air pressure inspection.

[0032] The above is only a specific embodiment of the utility model, which enables those skilled in the art to understand or implement the utility model. Although the foregoing embodiments are described in detail, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently. These modifications or replacements do not change the essence of the corresponding technical solutions, and they should be covered in the protection scope of the claims.

Claims

1. A gas inspection apparatus characterized by comprising: The utility model provides a kind of monitoring steel pipe (1), the monitoring steel pipe (1) is provided with sampling hole on pipe wall, the monitoring steel pipe (1) includes vent pipe (11), the vent pipe (11) is L type, i.e.

2. A gas inspection apparatus according to claim 1, characterized in that: The differential pressure gauge is a U-shaped differential pressure gauge (3).

3. A gas inspection apparatus according to claim 2, characterized in that: One end of the horizontal section is connected to a water needle (2), and the other end of the water needle (2) is connected to the U-shaped differential pressure gauge (3).

4. A gas inspection apparatus according to claim 3, characterized in that: The water needle (2) is fixedly connected to the horizontal section and the differential pressure gauge, respectively.

5. A gas inspection apparatus according to claim 1, characterized by: It also includes an extension pipe, the horizontal section and the vertical section are threadedly connected through a 90-degree elbow, one end of the extension pipe is threadedly connected to the 90-degree elbow, and the other end is threadedly connected to the vertical section.

6. A gas inspection apparatus according to claim 1, characterized by: The diameter of the conical cover (12) is not more than the inner diameter of the hole sealer (4).

7. A gas inspection apparatus according to any one of claims 1 to 6, characterized in that: The monitoring steel pipe (1) is provided with flanges at both ends, one end of the monitoring steel pipe (1) is connected to the hole sealer (4), the other end is connected to a cutoff door (5), and the cutoff door (5) is connected to a water return bend (6).

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