A deep coal bed methane exploitation sampling device

Abstract

The utility model discloses a kind of deep coalbed gas exploitation sampling devices, including shell, the shell inside is provided with inner bag, the hollow inside the inner bag, top and bottom are separately provided with communicating pipe and sampling pipe, the communicating pipe and sampling pipe are respectively worn out shell and with shell sliding connection, the inner bag is slidably arranged with sealing plate, the sealing plate top is fixedly provided with connecting frame, the connecting frame top is penetrated by screw rod and is connected with screw rod, the connecting frame top is provided with recess and the recess is slidably connected with limit rod, the limit rod one end is fixedly connected with inner bag, the screw rod one end is connected with motor fixedly installed in inner bag inside, by setting sampling device in inner bag, put inner bag in shell to protect inner bag, and set spring for buffering between inner bag and shell to buffer external impact force, and by setting counterweight that can be disassembled between each other, it is convenient to adjust counterweight.

Description

Technical Field

[0001] This utility model relates to the field of coalbed methane extraction and sampling technology, specifically to a deep coalbed methane extraction and sampling device. Background Technology

[0002] Deep coalbed methane refers to natural gas stored in coal seams buried at depths exceeding 1500 meters. Before mining coalbed methane, sampling and analysis are required. Since the sampling device needs to be sent into the deep well for sampling, the sampling device may be damaged by impacts during transportation, which could prevent the sampling device from completing the sampling process. This utility model proposes a sampling device for deep coalbed methane mining. Summary of the Invention

[0003] The purpose of this invention is to provide a sampling device for deep coalbed methane extraction, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a deep coalbed methane sampling device, comprising an outer shell, an inner liner inside the outer shell, a connecting pipe and a sampling pipe respectively disposed inside the hollow inner liner, and the connecting pipe and sampling pipe respectively disposed at the top and bottom. The connecting pipe and sampling pipe respectively extend out of the outer shell and are slidably connected to the outer shell. A sealing plate is slidably disposed inside the inner liner, and a connecting frame is fixedly disposed on the top of the sealing plate. The top of the connecting frame is penetrated by a screw and screwed to the screw. A groove is formed on the top of the connecting frame, and a limiting rod is slidably connected in the groove. One end of the limiting rod is fixedly connected to the inner liner, and one end of the screw is connected to a motor fixedly installed inside the inner liner. A top cover is provided on the top of the outer shell, and the top cover can be fixedly connected to the outer shell by bolts. Holes for the connecting pipe and sampling pipe to pass through are respectively formed on the top cover and the bottom of the outer shell.

[0005] Preferably, a sliding groove is provided on the inner wall of the outer shell, and a sliding rod is provided on the outer wall of the inner liner. One end of the sliding rod is slidably connected to the sliding groove, and a spring is sleeved on the outside of the sliding rod. One end of the spring is connected to the outer wall of the inner liner, and the other end is connected to the inner wall of the outer shell.

[0006] Preferably, a counterweight groove is formed on the inner wall of the outer shell, and a counterweight block is disposed in the counterweight groove. The function of setting up a counterweight system is to maintain the stability of the equipment in complex wells; balance the forces on various parts of the equipment; ensure sampling accuracy; and adapt to the needs of different depths and geological conditions.

[0007] Preferably, a stud is fixedly provided at the bottom of the counterweight groove, and a connecting rod is rotatably provided on the counterweight block. The top and bottom of the connecting rod extend out of the counterweight block and are respectively connected to the stud and the connecting block. The bottom of the connecting block has a threaded hole for screwing into the stud. A hexagonal protrusion can be provided on the stud at one end of the connecting rod for easy connection with a hexagonal wrench, so as to facilitate the rotation of the connecting rod by using a hexagonal wrench.

[0008] Preferably, a solenoid valve is installed inside the sampling tube and the connecting tube.

[0009] Compared with the prior art, the beneficial effects of this utility model are: by placing the sampling device in the inner liner, the inner liner is placed inside the outer shell to protect the inner liner, and a buffer spring is set between the inner liner and the outer shell to buffer the external impact force, and by setting counterweights that can be detached from each other, the counterweight can be easily adjusted. Attached Figure Description

[0010] Figure 1 This is a front sectional view of the connection structure between the outer shell and the inner liner of this utility model;

[0011] Figure 2 This is a top sectional view of the connection structure between the outer shell and the inner liner of this utility model;

[0012] Figure 3 This is a schematic diagram of the connection structure between the two counterweights of this utility model.

[0013] In the diagram: 1 Outer shell, 11 Slide groove, 12 Air inlet groove, 13 Counterweight groove, 2 Inner liner, 21 Slide rod, 22 Connecting pipe, 23 Spring, 24 Sampling tube, 3 Motor, 31 Screw, 4 Sealing plate, 41 Connecting frame, 5 Counterweight block, 51 Connecting rod, 52 Connecting block. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Referring to Figures (1-3), a deep coalbed methane extraction and sampling device includes an outer shell 1, an inner liner 2 inside the outer shell 1, a connecting pipe 22 and a sampling pipe 24 respectively provided at the top and bottom of the inner liner 2, the connecting pipe 22 and the sampling pipe 24 respectively passing through the outer shell 1 and slidably connected to the outer shell 1, a sealing plate 4 slidably provided inside the inner liner 2, a connecting frame 41 fixedly provided at the top of the sealing plate 4, the top of the connecting frame 41 being penetrated by a screw 31 and screwed to the screw 31, a groove being provided at the top of the connecting frame 41 and a limiting rod slidably connected in the groove, one end of the limiting rod being fixedly connected to the inner liner, and one end of the screw 31 being connected to a motor 3 fixedly installed inside the inner liner 2.

[0016] A groove 11 is provided on the inner wall of the outer shell 1, and a sliding rod 21 is provided on the outer wall of the inner liner 2. One end of the sliding rod 21 is slidably connected to the groove 11, and a spring 23 is sleeved on the outer side of the sliding rod 21. One end of the spring 23 is connected to the outer wall of the inner liner 2, and the other end is connected to the inner wall of the outer shell 1.

[0017] A counterweight groove 13 is provided on the inner wall of the outer casing 1, and a counterweight block 5 is provided in the counterweight groove 13. A stud is fixedly provided at the bottom of the counterweight groove 13, and a connecting rod 51 is rotatably provided on the counterweight block 5. The top and bottom of the connecting rod 51 extend out of the counterweight block 5 and are respectively connected to the stud and the connecting block 52. The bottom of the connecting block 52 has a threaded hole for screwing with the stud. A solenoid valve is provided in the sampling tube 24 and the connecting tube 22.

[0018] When in use, the device is driven by motor 3 to rotate screw 31, which in turn drives connecting frame 41 and sealing plate 4 to move along the inner wall of inner liner 2, drawing gas from the sampling area into inner liner 2. During sampling, the solenoid valves on sampling tube and connecting tube are in the open state, and in the closed state before and after sampling. The counterweight 5 is installed by placing the counterweight in counterweight groove 13, so that the stud at the bottom of counterweight groove 13 enters the screw hole at the bottom of connecting block 52, and the stud is screwed into the screw hole of connecting block by rotating connecting rod 51 to realize the installation of counterweight.

[0019] The orientations or positional relationships shown in the accompanying drawings are for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A sampling device for deep coalbed methane extraction, comprising a shell (1), characterized in that: The outer shell (1) is provided with an inner liner (2). The inner liner (2) is hollow inside, and a connecting pipe (22) and a sampling pipe (24) are respectively provided at the top and bottom. The connecting pipe (22) and the sampling pipe (24) pass through the outer shell (1) and are slidably connected to the outer shell (1). A sealing plate (4) is slidably provided inside the inner liner (2). A connecting frame (41) is fixedly provided on the top of the sealing plate (4). The top of the connecting frame (41) is penetrated by a screw (31) and screwed to the screw (31). A groove is opened on the top of the connecting frame (41) and a limiting rod is slidably connected in the groove. One end of the limiting rod is fixedly connected to the inner liner. One end of the screw (31) is connected to a motor (3) fixedly installed inside the inner liner (2).

2. The deep coalbed methane extraction and sampling device according to claim 1, characterized in that: The inner wall of the outer shell (1) is provided with a sliding groove (11), and the outer wall of the inner liner (2) is provided with a sliding rod (21). One end of the sliding rod (21) is slidably connected to the sliding groove (11), and a spring (23) is sleeved on the outside of the sliding rod (21). One end of the spring (23) is connected to the outer wall of the inner liner (2), and the other end is connected to the inner wall of the outer shell (1).

3. The deep coalbed methane extraction and sampling device according to claim 1, characterized in that: The inner wall of the outer shell (1) is provided with a counterweight groove (13), and a counterweight block (5) is provided in the counterweight groove (13).

4. A sampling device for deep coalbed methane extraction according to claim 3, characterized in that: The bottom of the counterweight groove (13) is fixedly provided with a stud, and a connecting rod (51) is rotatably provided on the counterweight block (5). The top and bottom of the connecting rod (51) pass through the counterweight block (5) and are respectively connected to a stud and a connecting block (52). The bottom of the connecting block (52) is provided with a screw hole that can be screwed to the stud.

5. A sampling device for deep coalbed methane extraction according to claim 1, characterized in that: Solenoid valves are installed inside the sampling tube (24) and the connecting tube (22).

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