Sealing control testing device for natural emission amount of coal seam gas

Abstract

The utility model relates to the technical field of coal seam testing devices, in particular to a coal seam gas natural emission sealing control testing device which comprises a flow tester and further comprises a telescopic rod, a detection probe is inserted into the telescopic rod and arranged at the top end of the telescopic rod, and a top ring block is arranged at the top end of the telescopic rod. The limiting ring block is detachably mounted on the telescopic rod, and a mounting groove cavity is formed between the limiting ring block and the top ring block; the sealing rubber mat is mounted in the mounting groove cavity; the gas guide cover is detachably mounted at the top end of the telescopic rod through an arranged connecting ring block; according to the sealing and controlling testing device for the natural discharge amount of the coal seam gas, the sealing rubber mat arranged on the rod body and a coal seam drill hole can form a sealing and packaging effect, the air tightness of a testing part can be improved, and then the natural discharge amount of the coal seam gas can be detected more accurately and efficiently in cooperation with the flow tester arranged on the telescopic rod; the device is convenient to use, easy to disassemble and assemble and practical.

Description

Technical Field

[0001] The utility model relates to the technical field of coal seam testing devices, and particularly relates to a sealing control testing device for natural gas emission of coal seams. Background Technique

[0002] The accurate measurement of the natural gas emission of coal seams is an important parameter for calculating the gas permeability coefficient of coal bodies and is of great significance for safe construction. At present, the traditional method for measuring the natural gas emission of coal seams mainly adopts the drainage gas collection method, which requires one end of a conduit to be placed in a borehole, the other end to be connected to a measuring cylinder, and the borehole to be simply sealed with yellow mud, an expander or other sealing materials, and then the gas emission volume within a certain period of time is calculated.

[0003] However, the existing testing methods have the following deficiencies: Firstly, the sealing process is complex, and there is a problem of incomplete sealing at the borehole, which is likely to leak air and affect the test data. Moreover, there are reading errors and inaccuracies. Therefore, it is considered to install a flow tester to measure the gas flow rate per unit time and maintain the installation tightness at the borehole to obtain efficient and accurate readings. In view of this, we propose a sealing control testing device for natural gas emission of coal seams. Content of the Utility Model

[0004] The purpose of the utility model is to solve the deficiencies mentioned in the above background technique and provide a sealing control testing device for natural gas emission of coal seams.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A sealing control testing device for natural gas emission of coal seams, including a flow tester for testing the gas emission volume, a detection probe is connected to the flow tester, and further includes:

[0007] A telescopic rod, the detection probe is inserted along the inside of the telescopic rod and is arranged at the top end, and a top ring block is arranged at the top end of the telescopic rod;

[0008] A limit ring block, which is detachably installed on the telescopic rod, and an installation cavity is arranged between the limit ring block and the top ring block;

[0009] A sealing gasket, which is installed in the installation cavity and is used for sealing and installing on the wall of the coal seam borehole;

[0010] An air guide cover, which is detachably installed at the top end of the telescopic rod through a connecting ring block and is used for protecting the detection probe.

[0011] Preferably, the sealing gasket includes a rubber inner pad sleeved on the installation cavity and a rubber outer pad sleeved outside the rubber inner pad.

[0012] Preferably, the outer walls of the rubber inner pad and the rubber outer pad are both in an expanding structure with a gradually increasing diameter from top to bottom;

[0013] The inner wall of the rubber outer pad is provided with an inner cavity structure that fits the outer wall of the rubber inner pad.

[0014] Preferably, a rubber block for sealing is installed inside the top rod body of the telescopic rod, and the detection probe is inserted into the rubber block.

[0015] Preferably, the rod body of the telescopic rod is provided with an external thread for threadedly installing the limit ring block.

[0016] Preferably, a dust-proof filter cover is sleeved outside the air guide cover.

[0017] Preferably, a carrying bracket for carrying the flow tester is installed at the bottom end of the telescopic rod.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] The sealed test device for the natural emission of coal seam gas can form a sealed packaging effect with the coal seam borehole through the sealing rubber pad provided on the rod body, which is beneficial to improving the airtightness of the test part. Then, in cooperation with the flow tester provided on the telescopic rod, it can more accurately and efficiently detect the natural emission of coal seam gas; the device is easy to use, simple to disassemble and assemble, and has practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The specification drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0021] Figure 1 is the installation schematic diagram of the embodiment of the present utility model;

[0022] Figure 2 is the overall structure schematic diagram of the present utility model;

[0023] Figure 3 is the overall structure decomposition diagram of the present utility model;

[0024] Figure 4 is the installation schematic diagram of the rubber inner pad and the rubber outer pad of the present utility model;

[0025] Figure 5 is the installation schematic diagram of the dust-proof filter cover and the air guide cover of the present utility model.

[0026] The meanings of the various reference numerals in the drawings are as follows:

[0027] 1. Flow tester; 101. Detection probe; 2. Telescopic rod; 201. External thread; 21. Top ring block; 3. Limit ring block; 4. Rubber block;

[0028] 5. Rubber inner pad; 6. Rubber outer pad; 7. Air guide hood; 71. Connecting ring block; 8. Dust-proof filter hood; 9. Carrying bracket. Detailed implementation manner

[0029] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Please refer to Figures 1-5 , the above technical solutions of the present invention will be described in detail through the following embodiments:

[0031] A device for sealing and testing the natural emission amount of coal seam gas includes a flow tester 1 for testing the gas emission amount. A detection probe 101 is connected to the flow tester 1. It further includes:

[0032] A telescopic rod 2, as shown in the structure of Figure 3 , in this embodiment, the detection probe 101 is inserted along the inside of the telescopic rod 2 and arranged at the top end. A top ring block 21 is provided at the top end of the telescopic rod 2, and an external thread 201 is provided on the rod body of the telescopic rod 2. In order to facilitate the installation of the flow tester 1, a carrying bracket 9 for is installed at the bottom end of the telescopic rod 2.

[0033] A limit ring block 3 is threadedly installed on the telescopic rod 2 through the external thread 201, so that an installation cavity is provided between the limit ring block 3 and the top ring block 21; as shown in the structures of Figure 1 , Figure 2 and Figure 4 , a sealing gasket is installed in the installation cavity. Through the sealing gasket, it can be tightly pressed against the coal seam borehole wall from bottom to top, and then maintain a sealed installation state; specifically, in order to obtain the effect of pressing against the borehole wall, the sealing gasket in this embodiment is as shown in Figure 4The structure shown includes a rubber inner pad 5 sleeved at the installation cavity, and a rubber outer pad 6 sleeved outside the rubber inner pad 5; the outer walls of both the rubber inner pad 5 and the rubber outer pad 6 are of an expanding structure with a gradually increasing diameter from top to bottom, and the inner wall of the rubber outer pad 6 is provided with an inner cavity structure that fits the outer wall of the rubber inner pad 5; that is, during the process of inserting the sealing gasket into the drilling hole, the rubber outer pad 6 will tend to move downward under the extrusion of the drilling hole wall, and then press the rubber inner pad 5 and the drilling hole wall along the expanding structure. This installation method is convenient and is conducive to obtaining a tight sealing effect. In order to reduce the weight, the telescopic rod 2 in this embodiment is made of a carbon fiber rod.

[0034] The air guide cover 7 is detachably installed at the top of the telescopic rod 2 through a connecting ring block 71 provided, and is used to protect the detection probe 101. In this embodiment, a rubber block 4 for sealing is installed inside the top rod body of the telescopic rod 2, and the detection probe 101 is inserted on the rubber block 4; in order to prevent unnecessary coal slag from falling into the air guide cover 7 during the detection process and damaging or affecting the detection probe 101, a dust-proof filter cover 8 is sleeved outside the air guide cover 7 in this embodiment.

[0035] The working principle of the coal seam gas natural emission control testing device in this embodiment is as follows: as Figure 1 shown, first insert the detection probe 101 along the inside of the telescopic rod 2 and set it at the top, install the air guide cover 7 and the dust-proof filter cover 8; then insert the rubber inner pad 5 and the rubber outer pad 6 on the telescopic rod 2, then install the limit ring block 3 to hold the rubber inner pad 5 and the rubber outer pad 6, and finally install the bearing bracket 9; drill a hole in the coal seam that can squeeze the rubber outer pad 6, and insert the device from bottom to top as Figure 1 shown, and the testing time is 20 - 30 minutes; the gas at the detection probe 101 enters the flow tester 1 through a hose to complete the measurement of the gas flow; repeat the test, continuously test for 8 - 10 days, and fit it into a curve to obtain the natural emission of gas in this coal seam.

[0036] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, then these directional indications are only used to explain the relative position relationship and movement conditions between components in a certain specific posture. If this specific posture changes, then these directional indications will also change accordingly.

[0037] In addition, if the descriptions such as "first" and "second" are involved in the embodiments of the present utility model, these descriptions of "first", "second", etc. are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, "a plurality of" means more than two. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0038] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes that fall within the meaning and scope of the equivalent elements of the claims within the present utility model.

Claims

1. A device for testing the natural emission of coal seam gas, comprising a flow tester (1) for testing the emission of gas, wherein a detection probe (101) is connected to the flow tester (1), and characterized in that: Also includes: A telescopic rod (2), wherein the detection probe (101) is inserted inside the telescopic rod (2) and arranged at the top end, and a top ring block (21) is provided at the top end of the telescopic rod (2); A limiting ring block (3) is detachably mounted on the telescopic rod (2), and a mounting groove cavity is provided between the limiting ring block (3) and the top ring block (21); A sealing rubber pad is installed in the installation groove cavity and is used for sealing and installing on the wall of the coal seam drilling hole; The air guide cover (7) is detachably mounted on the top end of the telescopic rod (2) via a connecting ring block (71) and is used to protect the detection probe (101).

2. The device for controlling the natural emission of coal seam gas according to claim 1, characterized in that: The sealing rubber pad comprises a rubber inner pad (5) sleeved on the installation groove cavity, and a rubber outer pad (6) sleeved on the outside of the rubber inner pad (5).

3. The device for controlling the natural emission of coal seam gas according to claim 2, characterized in that: The outer walls of the rubber inner pad (5) and the rubber outer pad (6) are both in an expansion structure with diameters gradually increasing from top to bottom; The inner wall of the rubber outer pad (6) is provided with an inner cavity structure that fits with the outer wall of the rubber inner pad (5).

4. The device for testing the natural emission of coal seam gas according to claim 1, characterized in that: A rubber block (4) for sealing is installed in the rod body at the top end of the telescopic rod (2), and the detection probe (101) is inserted into the rubber block (4).

5. The device for testing the natural emission of coal seam gas according to claim 1, characterized in that: The telescopic rod (2) is provided with an external thread (201) on the rod body for threadedly mounting the limiting ring block (3).

6. The device for testing the natural emission of coal seam gas according to claim 1, characterized in that: The air guide cover (7) is externally sleeved with a dustproof filter cover (8).

7. The device for testing the natural emission of coal seam gas according to claim 1, characterized in that: A bearing bracket (9) for bearing the flow tester (1) is installed at the bottom end of the telescopic rod (2).

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