Water metering device for coal bed gas drainage and mining

Abstract

The utility model discloses a water metering device for coal bed gas drainage, which comprises a base, a filter cartridge, a water inlet pipe, a water drainage pipe, a filter screen cartridge, two cleaning mechanisms, a flow meter and a controller, a through hole is arranged on the base in a penetrating manner, and one end of the filter cartridge is mounted in the through hole; the water inlet pipe and the water outlet pipe are oppositely arranged on two sides of the filter cartridge and are respectively communicated with the filter cartridge; the filter screen cylinder is arranged in the filter screen cylinder, an inclined opening is formed in the filter screen cylinder, the water inlet pipe corresponds to the inclined opening, and the water drainage pipe corresponds to the filter screen cylinder; a rotating shaft is arranged in the filter screen cylinder, the two clearing mechanisms are connected with the rotating shaft, and the clearing mechanisms are attached to the inner wall of the filter screen cylinder; the bottom of the filter screen cylinder is communicated with an impurity discharge pipe; the flowmeter is arranged on the drainage pipe; the controller is installed on the base and connected with the flow meter. Therefore, impurities in the filter screen cylinder can be conveniently removed, and the filtering effect of the filter screen cylinder is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water metering, in particular to a water metering device for coalbed methane drainage. Background Art

[0002] Coalbed methane (CBM) is an unconventional natural gas resource primarily found in coal seams. It primarily consists of methane, most of which is adsorbed on the surface of coal particles, with some remaining free within coal pores or dissolved in coalbed water. As a mineral associated with coal, CBM has rapidly emerged in the past decade or two, becoming a highly regarded clean, high-quality energy source and chemical feedstock. During CBM extraction, controlling the quality of drainage water is crucial to ensuring stable operation.

[0003] Before coal reservoirs are developed, the cleat system is filled with pressurized water, while the coal matrix maintains a dynamic equilibrium between the adsorption and desorption of methane molecules. Therefore, the first step in coal seam extraction is to drain the pressurized water from the cleat system to disrupt this equilibrium and create a pathway for the gas to effectively flow into the wellbore. However, during the extraction process, the pressurized water often carries impurities such as coal ash and sand and gravel, which can cause damage to the metering equipment when these impurities flow through it. Therefore, filtering the pressurized water is particularly important.

[0004] Currently, filter cartridges are mainly used for filtration. However, after long-term use, the mesh of the filter cartridges is easily clogged, resulting in low filtration efficiency. They need to be regularly dismantled for cleaning. This cleaning method is cumbersome and further affects the filtration efficiency. Utility Model Content

[0005] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0006] To this end, one purpose of the present invention is to provide a water metering device for coalbed methane drainage, which can easily remove impurities inside the filter cylinder, thereby effectively improving its filtering effect.

[0007] 18. The escaping filter bag of claim 17, wherein the filter bag further comprises a through-hole, the through-hole comprising the at least one filter pocket, and the through-hole comprising the filter pocket.

[0008] The water metering device for coalbed methane drainage of the utility model can conveniently remove impurities inside the filter mesh cylinder, thereby effectively improving its filtering effect.

[0009] In addition, the water metering device for coalbed methane drainage proposed in the application may also have the following additional technical features:

[0010] Specifically, the bottom of the filter screen cartridge is funnel-shaped, and a support seat is provided at the bottom of the filter screen cartridge, and the filter screen cartridge is fitted with the support seat.

[0011] Specifically, the cleaning mechanism includes multiple connecting components and cleaning brushes, wherein multiple sleeves are provided on the rotating shaft, one end of the multiple connecting components are respectively connected to the corresponding sleeves, and the other end of the multiple connecting components are connected to the cleaning brushes.

[0012] Specifically, the connecting assembly includes a first support rod, a spring, a second support rod and a limit rod, wherein one end of the first support rod is arranged on the shaft sleeve, and the other end of the first support rod is provided with a groove; the spring is installed in the groove; one end of the second support rod is connected to the spring, and the second support rod is slidably connected to the groove, and the other end of the second support rod is connected to the cleaning brush; a limit groove is provided through the groove wall, the limit rod is slidably connected to the limit groove, and one end of the limit rod is installed on the second support rod.

[0013] Specifically, a plurality of brackets are provided on the rotating shaft, and the brackets are connected to the inner wall of the filter cylinder.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0016] Figure 1 This is a structural schematic diagram of a water metering device for coalbed methane drainage according to an embodiment of the present utility model;

[0017] Figure 2 This is a cross-sectional view of a water metering device for coalbed methane drainage according to an embodiment of the present utility model;

[0018] Figure 3 This is a structural schematic diagram of a cleaning mechanism in a water metering device for coalbed methane drainage according to an embodiment of the present utility model;

[0019] Figure 4 This is a structural schematic diagram of a connecting component in a water metering device for coalbed methane drainage according to an embodiment of the utility model.

[0020] As shown in the figure: 1. Base; 2. Filter cartridge; 3. Water inlet pipe; 4. Drain pipe; 5. Filter mesh cartridge; 6. Cleaning mechanism; 7. Flow meter; 8. Controller; 9. Rotating shaft; 10. Drain pipe; 11. Support seat; 12. Bushing; 13. Bracket; 60. Connecting assembly; 61. Cleaning brush; 601. First support rod; 602. Spring; 603. Second support rod; 604. Limit rod; 6011. Groove; 6012. Limit slot. DETAILED DESCRIPTION

[0021] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention. On the contrary, the embodiments of the present invention include all variations, modifications, and equivalents that fall within the spirit and scope of the appended claims.

[0022] The water metering device for coalbed methane drainage according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0023] like Figures 1 to 4 As shown, the water metering device for coalbed methane drainage in an embodiment of the utility model may include a base 1, a filter cartridge 2, a water inlet pipe 3, a drain pipe 4, a filter mesh cartridge 5, two cleaning mechanisms 6, a flow meter 7 and a controller 8.

[0024] Among them, a through hole is provided on the base 1, one end of the filter cartridge 2 is installed in the through hole, the water inlet pipe 3 and the drain pipe 4 are relatively arranged on both sides of the filter cartridge 2, and the water inlet pipe 3 and the drain pipe 4 are respectively connected to the filter cartridge 2.

[0025] It should be noted that the base 1 supports the entire metering device. The extracted pressurized water enters the interior of the filter cartridge 2 through the water inlet pipe 3 and is discharged from the drain pipe 4 after being filtered by the filter mesh cartridge 5.

[0026] The filter screen cartridge 5 is arranged inside the filter screen cartridge 5 , and an oblique opening is provided on the filter screen cartridge 5 . The water inlet pipe 3 is arranged corresponding to the oblique opening, and the drain pipe 4 is arranged corresponding to the filter screen cartridge 5 .

[0027] It should be noted that the filter screen cartridge 5 described in this embodiment is a cylindrical structure with an upper opening, and a plurality of filter holes are provided on the side wall and bottom wall of the filter screen cartridge 5. The opening of the filter screen cartridge 5 is lower at the end adjacent to the water inlet pipe 3 and higher at the end adjacent to the drain pipe 4, and can completely block the connection between the drain pipe 4 and the filter cartridge 2.

[0028] Furthermore, in order to improve the filtering effect, a filter is detachably connected to the drain pipe 4. The filter is installed between the flow meter 7 and the filter cartridge 2. The filter can effectively filter the coal ash in the water.

[0029] A rotating shaft 9 is provided inside the filter screen cylinder 5, and two cleaning mechanisms 6 are respectively connected to the rotating shaft 9, and the cleaning mechanisms 6 are in contact with the inner wall of the filter screen cylinder 5; a drainage pipe 10 is provided at the bottom of the filter screen cylinder 5; a flow meter 7 is arranged on the drain pipe 4; a controller 8 is installed on the base 1, and the controller 8 is connected to the flow meter 7.

[0030] It should be noted that the rotating shaft 9 described in this embodiment is connected to an external driving mechanism, such as a motor, which can drive the rotating shaft 9 to rotate. The rotating shaft 9 drives the two cleaning mechanisms 6 to rotate to remove impurities on the inner wall of the filter cylinder 5 and discharge them through the impurity discharge pipe 10.

[0031] Furthermore, a control valve (not shown in the figure) is provided on the impurity discharge pipe 10 to control the discharge of impurities.

[0032] In one embodiment of the present invention, Figure 2 As shown, the bottom of the filter screen cartridge 5 is funnel-shaped, and a support seat 11 is provided at the bottom of the filter cartridge 2 , and the filter screen cartridge 5 is fitted with the support seat 11 .

[0033] In the embodiment of the present invention, the support seat 11 supports the filter cartridge 2 , so that the filter cartridge 2 can be stably disposed inside the support seat 11 .

[0034] In one embodiment of the present invention, Figure 3 and Figure 4 As shown, the cleaning mechanism 6 may include multiple connecting components 60 and cleaning brushes 61, wherein multiple sleeves 12 are provided on the rotating shaft 9, one end of the multiple connecting components 60 is respectively connected to the corresponding sleeves 12, and the other end of the multiple connecting components 60 is connected to the cleaning brush 61.

[0035] It should be noted that the cleaning brush 61 described in this embodiment is a wire brush, which has good hardness and is better at removing impurities. The connecting component 60 can abut the cleaning brush 61 against the inner wall of the filter cylinder 5, thereby improving the effect of removing impurities.

[0036] Furthermore, if Figure 4 As shown, the connecting assembly 60 may include a first support rod 601, a spring 602, a second support rod 603 and a limiting rod 604, wherein one end of the first support rod 601 is arranged on the shaft sleeve 12, and the other end of the first support rod 601 is provided with a groove 6011; the spring 602 is installed in the groove 6011; one end of the second support rod 603 is connected to the spring 602, and the other end of the second support rod 603 is connected to the cleaning brush 61; the groove wall of the groove 6011 is penetrated by a limiting groove 6012, the limiting rod 604 is slidably connected to the limiting groove 6012, and one end of the limiting rod 604 is installed on the second support rod 603.

[0037] It should be noted that one end of the second support rod 603 is slidably connected to the groove 6011 , and the second support rod 603 and the cleaning brush 61 are detachably connected to facilitate replacement of the cleaning brush 61 .

[0038] In the embodiment of the present application, when the cleaning brush 61 is worn out after long-term use, the spring 602 can keep the cleaning brush 61 in contact with the inner wall of the filter cylinder 5 at all times, thereby improving the effect of removing impurities.

[0039] In one embodiment of the present invention, Figure 2 As shown, a plurality of brackets 13 are provided on the rotating shaft 9 , and the brackets 13 are connected to the inner wall of the filter screen cylinder 5 .

[0040] In the embodiment of the present application, the plurality of brackets 13 can support the rotating shaft 9 , thereby improving the stability of the rotating shaft 9 during rotation.

[0041] Specifically, the extracted pressurized water is transported to the filter cartridge 2 through the water inlet pipe 3 and enters the filter mesh cartridge 5 through the opening. Some impurities (such as sand and gravel) in the pressurized water are retained in the filter cartridge 2. When the filtered water flows through the drain pipe 4, the filter can remove the coal ash. At the same time, the flow meter 7 can timely detect the water flow through the drain pipe 4 and transmit the test results to the controller 8. The controller 8 is connected to an external display device (not shown in the figure) to display the flow through the display device.

[0042] When the mesh of the filter cylinder 5 is clogged due to long-term use, relevant personnel can control the rotation of the rotating shaft 9. With the cooperation of the connecting component 60, the cleaning brush 61 can be driven to rotate to remove impurities on the inner wall of the filter cylinder 5. The impurities are discharged through the exhaust pipe 10. The operation is convenient, thereby improving the filtering efficiency of the filter cylinder 5.

[0043] In summary, the water metering device for coalbed methane drainage in the embodiment of the present invention can conveniently remove impurities inside the filter mesh cylinder, thereby effectively improving its filtering effect.

[0044] In this specification, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this utility model, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0045] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

Claims

1. A water metering device for coalbed methane drainage, characterized in that: It includes a base, a filter cartridge, a water inlet pipe, a drain pipe, a filter cartridge, two cleaning mechanisms, a flow meter and a controller, wherein: A through hole is formed on the base, and one end of the filter cartridge is installed in the through hole; The water inlet pipe and the drain pipe are arranged on both sides of the filter cartridge relative to each other, and the water inlet pipe and the drain pipe are respectively connected to the filter cartridge; The filter screen cylinder is arranged inside the filter screen cylinder, and an oblique opening is provided on the filter screen cylinder. The water inlet pipe is arranged corresponding to the oblique opening, and the drain pipe is arranged corresponding to the filter screen cylinder. A rotating shaft is provided inside the filter cylinder, and the two cleaning mechanisms are respectively connected to the rotating shaft, and the cleaning mechanisms are in contact with the inner wall of the filter cylinder; The bottom of the filter cylinder is connected to a drainage pipe; The flow meter is arranged on the drain pipe; The controller is installed on the base, and the controller is connected to the flow meter.

2. The water metering device for coalbed methane drainage according to claim 1, characterized in that: The bottom of the filter screen cartridge is funnel-shaped, and a support seat is provided at the bottom of the filter screen cartridge. The filter screen cartridge is fitted with the support seat.

3. The water metering device for coalbed methane drainage according to claim 1, characterized in that: The cleaning mechanism includes a plurality of connecting components and a cleaning brush, wherein: A plurality of shaft sleeves are provided on the rotating shaft, one end of each of the connecting components is connected to the corresponding shaft sleeves, and the other end of each of the connecting components is connected to the cleaning brush.

4. The water metering device for coalbed methane drainage according to claim 3 is characterized in that: The connecting assembly includes a first support rod, a spring, a second support rod and a limiting rod, wherein: One end of the first support rod is arranged on the shaft sleeve, and the other end of the first support rod is provided with a groove; The spring is installed in the groove; One end of the second support rod is connected to the spring, and the second support rod is slidably connected to the groove, and the other end of the second support rod is connected to the cleaning brush; A limiting groove is formed through the groove wall of the groove, the limiting rod is slidably connected to the limiting groove, and one end of the limiting rod is mounted on the second supporting rod.

5. The water metering device for coalbed methane drainage according to claim 1, characterized in that: A plurality of brackets are provided on the rotating shaft, and the brackets are connected to the inner wall of the filter cylinder.

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