Sand fracturing device for coal mine gas extraction wells

Abstract

This utility model provides a sand fracturing device for coal mine gas drainage wells, including a mixing component, a storage component, and a fracturing pump. The mixing component, storage component, and fracturing pump are respectively mounted on a support, with the fracturing pump located below the mixing component, which is located below the storage component. The mixing component includes a shell and a stirring unit. The stirring unit is mounted on the shell, with one end of the stirring unit located inside the shell. The shell has a first feed inlet and a second feed inlet, which are arranged opposite to each other on the outer periphery of the shell. The first and second feed inlets are respectively used to connect to the storage component. The lower end of the shell has a first discharge outlet. This sand fracturing device for coal mine gas drainage wells replaces the traditional sand fracturing method of feeding sand by its own weight, solving the problem of sand clogging the conveying pipeline during the traditional sand fracturing process, thus improving work efficiency and safety.

Description

Technical Field

[0001] This utility model belongs to the technical field of coal mining equipment, and in particular relates to a sand fracturing device for coal mine gas extraction wells. Background Technology

[0002] Gas drainage is a crucial step in ensuring safe coal mine production and improving coal mining efficiency. During coal mining, the presence of gas not only threatens the lives of miners but can also trigger serious explosions. According to relevant data, most coal mines in my country have low-permeability coal seams, making gas drainage particularly challenging. Currently, fracturing with proppant is widely used as an effective measure to increase coal seam permeability. However, uneven mixing of the fracturing fluid affects the fracturing effect, and blockages in the proppant injection pipeline require frequent shutdowns for adjustments, resulting in wasted manpower and resources and potential safety hazards. Utility Model Content

[0003] In view of this, the present invention aims to propose a sand fracturing device for coal mine gas extraction wells to solve the problems of waste of manpower and material resources and production safety hazards caused by the traditional method.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] A fracturing device for coal mine gas extraction wells includes a mixing component, a storage component, and a fracturing pump. The mixing component, storage component, and fracturing pump are respectively mounted on a support. The fracturing pump is located below the mixing component, and the mixing component is located below the storage component. The mixing component includes a shell and a stirring unit. The stirring unit is mounted on the shell, with one end of the stirring unit located inside the shell. The shell has a first feed inlet and a second feed inlet, which are arranged opposite to each other on the outer periphery of the shell. The first feed inlet and the second feed inlet are respectively used to connect to the storage component. The lower end of the shell has a first discharge outlet, which is used to connect to the fracturing pump.

[0006] Furthermore, electromagnetic flow switches are respectively installed on the first feed inlet, the second feed inlet, and the first discharge outlet. The electromagnetic flow switches are used to control the flow of materials.

[0007] Furthermore, the stirring unit includes an outer rotating shaft, an inner rotating shaft, and a rotating structure. One end of the outer rotating shaft is rotatably connected to the upper end of the shell, and the inner ring of the outer rotating shaft is rotatably connected to the outer ring of the inner rotating shaft. The rotating structure is fixedly installed at the upper end of the shell and is used to drive the outer rotating shaft and the inner rotating shaft to rotate.

[0008] Furthermore, the outer rotating shaft and the inner rotating shaft have the same structure. One end of the outer rotating shaft is rotatably connected to the upper end of the shell, and the other end of the outer rotating shaft is fixedly provided with multiple spiral stirring blades, which are evenly distributed around the outer rotating shaft.

[0009] Furthermore, the rotating structure includes a rotating motor, a driving gear, a first driven gear, and a second driven gear. The driving gear is fixedly mounted on the output shaft of the rotating motor. The two sides of the driving gear are respectively meshed with the first driven gear and the second driven gear. The driving gear, the first driven gear, and the second driven gear constitute a synchronous transmission structure. The first driven gear and the second driven gear are parallel to each other and arranged opposite each other. The first driven gear and the second driven gear are respectively fixedly connected to the periphery of one end of the outer rotating shaft and the inner rotating shaft.

[0010] Furthermore, the storage component includes a water tank and a sand tank, which are mounted on a support and located on opposite sides of the mixing component. The water tank includes a water container and a first pipe. The water container is mounted on the support and has a tapered end. One end of the water container is fixedly connected to one end of the first pipe, and the other end of the first pipe is fixedly connected to the first feed inlet.

[0011] Furthermore, the sand storage tank includes a sand tank, a conveyor, a second pipe, and a rubber hose. The lower end of the sand tank has a constricted structure, and a conveyor is provided at the lower end of the sand tank. The conveyor is used to transport the sand inside the sand tank. The discharge end of the conveyor is fixedly connected to one end of the second pipe, and the other end of the second pipe is connected to one end of the rubber hose. The other end of the rubber hose is connected to the second inlet. Hoops are provided at both ends of the rubber hose to limit the relative position of the rubber hose.

[0012] Furthermore, the sand storage tank also includes a vibrator, which is fixedly installed on the outer wall of the second pipe and is used to clear the sand in the second pipe.

[0013] Furthermore, the fracturing pump is provided with a third feed port, which is fixedly connected to the first discharge port. A second discharge port is provided on one side of the fracturing pump, and the second discharge port outputs the fracturing fluid in the mixing component to the well through a high-pressure pipe.

[0014] Compared with the prior art, the sand fracturing device for coal mine gas extraction wells described in this utility model has the following beneficial effects:

[0015] (1) The coal mine gas extraction well sand fracturing device described in this utility model is equipped with an electromagnetic flow switch, which can accurately calculate the input and output flow rates, ensure the material ratio in the mixing component, and improve the fracturing fluid usage effect.

[0016] (2) The coal mine gas extraction well sand fracturing device described in this utility model is equipped with a dual-axis rotating structure to fully mix the materials, reduce resource waste caused by uneven material mixing, reduce manual labor, and lower production costs.

[0017] (3) The coal mine gas extraction well sand fracturing device described in this utility model is equipped with a water tank and a sand tank with a conical structure, which facilitates the automatic discharge of materials in the tank. A conveyor is provided to assist in the transportation of sand, reduce the accumulation of sand, reduce manual labor, increase work continuity, and improve work efficiency.

[0018] (4) The sand fracturing device for coal mine gas extraction well described in this utility model is equipped with a vibrator. When the sand is transported through the second pipeline, the vibrator vibrates to reduce the deposition of sand in the second pipeline, avoids the blockage of sand in the second pipeline, reduces safety hazards, and improves production safety.

[0019] (5) The sand fracturing device for coal mine gas extraction well described in this utility model is equipped with a rubber hose. The second pipeline is connected to the mixing component through the rubber hose, which reduces the impact of the vibrator on the mixing component when it vibrates, improves the stability of equipment operation, and improves work efficiency. Attached Figure Description

[0020] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of the sand fracturing device for coal mine gas extraction wells described in this embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the hybrid component described in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the stirring unit described in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the rotating structure described in an embodiment of the present utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the storage component described in an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the water storage tank described in an embodiment of the present utility model;

[0027] Figure 7 This is a schematic diagram of the structure of the sand storage tank described in an embodiment of the present utility model;

[0028] Figure 8 This is a schematic diagram of the fracturing pump described in an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1-Mixing component; 11-Shell; 12-Agitator; 121-Outer shaft; 1211-Helical agitator blade; 122-Inner shaft; 123-Rotating structure; 1231-Rotating motor; 1232-Driving gear; 1233-First driven gear; 1234-Second driven gear; 13-First feed inlet; 14-Second feed inlet; 15-First discharge outlet; 16-Electromagnetic flow switch; 2-Storage component; 21-Water tank; 211-Water tank; 212-First pipeline; 22-Sand tank; 221-Sand tank; 222-Conveyor; 223-Second pipeline; 224-Rubber hose; 2241-Cuff; 225-Vibrator; 3-Fracturing pump; 31-Third feed inlet; 32-Second discharge outlet. Detailed Implementation

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0032] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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 this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] like Figure 1-2As shown, a fracturing device for coal mine gas extraction wells is characterized by comprising a mixing component 1, a storage component 2, and a fracturing pump 3, which are respectively mounted on a support 4. The fracturing pump 3 is located below the mixing component 1, and the mixing component 1 is located below the storage component 2. The mixing component 1 can fully mix the materials in the storage component, ensuring the stability and reliability of the fracturing effect, reducing manual labor, and increasing work efficiency. The mixing component 1 includes a shell 11 and a stirring unit 12. The stirring unit 12 is mounted on the shell 11, and one end of the stirring unit 12 is located inside the shell 11. The shell 11 is provided with a first inlet. The first feed inlet 13 and the second feed inlet 14 are arranged opposite each other on the periphery of the housing 11. The first feed inlet 13 and the second feed inlet 14 are respectively used to connect to the storage component 2. The lower end of the housing 11 is provided with a first discharge port 15, which is used to connect to the fracturing pump 3. Electromagnetic flow switches 16 are respectively installed on the first feed inlet 13, the second feed inlet 14 and the first discharge port 15. The electromagnetic flow switches 16 can accurately control the mixing ratio of materials, improve the fracturing effect of fracturing fluid and improve work efficiency. The electromagnetic flow switches 16 are existing technology and the model of the electromagnetic flow switches 16 is LDG-MIK.

[0036] like Figure 3 As shown, the stirring unit 12 includes an outer rotating shaft 121, an inner rotating shaft 122, and a rotating structure 123. One end of the outer rotating shaft 121 is rotatably connected to the upper end of the housing 11, and the inner ring of the outer rotating shaft 121 is rotatably connected to the outer ring of the inner rotating shaft 122. The rotating structure 123 is fixedly installed at the upper end of the housing 11. The rotating structure 123 is used to drive the outer rotating shaft 121 and the inner rotating shaft 122 to rotate. By setting the rotating structure 123, the outer rotating shaft 121 and the inner rotating shaft 122 are driven to rotate in opposite directions. The shaft agitation ensures uniform mixing of the fracturing fluid, improving fracturing effect and work efficiency. The outer rotating shaft 121 and the inner rotating shaft 122 have the same structure. One end of the outer rotating shaft 121 is rotatably connected to the upper end of the shell 11, and the other end of the outer rotating shaft 121 is fixedly provided with multiple spiral stirring blades 1211. The multiple spiral stirring blades 1211 are evenly distributed around the outer rotating shaft 121. The multiple evenly distributed spiral stirring blades 1211 ensure uniform mixing of the fracturing fluid, improving fracturing effect and work efficiency.

[0037] like Figure 4As shown, the rotating structure 123 includes a rotating motor 1231, a driving gear 1232, a first driven gear 1233, and a second driven gear 1234. The driving gear 1232 is fixedly mounted on the output shaft of the rotating motor 1231. The two sides of the driving gear 1232 are respectively meshed with the first driven gear 1233 and the second driven gear 1234. The driving gear 1232, the first driven gear 1233, and the second driven gear 1234 constitute a synchronous transmission structure. The first driven gear 1233 and the second driven gear 1234 are parallel to each other and face each other. The first driven gear 1233 and the second driven gear 1234 are respectively fixedly connected to the periphery of one end of the outer rotating shaft 121 and the inner rotating shaft 122. By using the parallel and facing first driven gear 1233 and the second driven gear 1234, the rotation directions of the outer rotating shaft 121 and the inner rotating shaft 122 are opposite, which fully agitates the fracturing fluid, reduces agitation time, and improves working efficiency.

[0038] like Figure 5 and Figure 6 As shown, the storage component 2 includes a water tank 21 and a sand tank 22. The water tank 21 and the sand tank 22 are mounted on the support 4 and are located on both sides of the mixing component 1. The water tank 21 includes a water tank 211 and a first pipe 212. The water tank 211 is mounted on the support 4 and has a conical structure at its lower end. One end of the water tank 211 is fixedly connected to one end of the first pipe 212, and the other end of the first pipe 212 is fixedly connected to the first feed inlet 13. The first pipe 212 is used to connect the water tank 21 and the mixing component 1. The water tank 211 with a conical lower end facilitates the outflow of materials from the water tank, reduces manual labor, and improves work efficiency.

[0039] like Figure 7As shown, the sand storage tank 22 includes a sand tank 221, a conveyor 222, a second pipe 223, and a rubber hose 224. The lower end of the sand tank 221 has a constricted opening, and the conveyor 222 is installed at the lower end of the sand tank 221. The conveyor 222 is used to transport the sand inside the sand tank 221. The discharge end of the conveyor 222 is fixedly connected to one end of the second pipe 223, and the other end of the second pipe 223 is connected to one end of the rubber hose 224. The other end of the rubber hose 224 is connected to the second inlet 14. Hoops 2241 are respectively installed at both ends of the rubber hose 224. The hoops 2241 are used for... The relative position of the rubber hose 224 is defined; the sand storage tank 22 also includes a vibrator 225, which is fixedly installed on the outer wall of the second pipe 223. The vibrator 225 is used to clear the sand in the second pipe 223. The conveyor 222 and the vibrator 225 are set up to ensure the continuity of material transportation in the sand tank 221, reduce the risk of accumulation, and improve production safety. The rubber hose 224 reduces the impact of the vibrator 225 on the mixing component 1, reduces manual labor, and improves work efficiency. The conveyor 222 is the prior art and the model is a horizontal screw conveyor 219.

[0040] like Figure 8 As shown, the fracturing pump 3 is fixedly mounted on the support 4 and is located at the lower end of the mixing component 1. The fracturing pump 3 is provided with a third feed port 31, which is fixedly connected to the first discharge port 15. A second discharge port 32 is provided on one side of the fracturing pump 3. The second discharge port 32 outputs the fracturing fluid in the mixing component 1 to the well through a high-pressure pipe. The fracturing pump 3 is set to transmit the fracturing fluid that is uniformly stirred in the mixing component 1 through high pressure to achieve the fracturing effect and improve work efficiency.

[0041] Working process of sand fracturing device for coal mine gas drainage well:

[0042] The required material ratio for fracturing fluid is calculated based on preliminary surveys. The materials in the water storage tank 21 and sand storage tank 22 are output to the mixing component 1 according to the ratio through the electromagnetic flow switch 16. At the same time, the conveyor 222 and vibrator 225 are turned on to ensure the continuity of sand transportation. The rotating motor 1231 is turned on to drive the outer rotating shaft 121 and inner rotating shaft 122 to rotate and fully mix the materials. The mixed materials are transported to the fracturing pump 3 through the first discharge port 15 and the third inlet port 31. The materials are then output to the location where fracturing is required through the high-pressure pipe connected to the second discharge port 32 of the fracturing pump 3.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sand-adding fracturing device for coal mine gas extraction wells, characterized in that: The assembly includes a mixing component (1), a storage component (2), and a fracturing pump (3). The mixing component (1), the storage component (2), and the fracturing pump (3) are respectively mounted on a support (4). The fracturing pump (3) is located below the mixing component (1), and the mixing component (1) is located below the storage component (2). The mixing component (1) includes a housing (11) and a stirring unit (12). The stirring unit (12) is mounted on the housing (11), and one end of the stirring unit (12) is located inside the housing (11). The housing (11) is provided with a first feed port (13) and a second feed port (14), and the first feed port (13) and the second feed port (14) are arranged opposite to each other on the periphery of the housing (11). The first feed port (13) and the second feed port (14) are respectively used to connect to the storage component (2). The lower end of the housing (11) is provided with a first discharge port (15), which is used to connect to the fracturing pump (3).

2. The sand-adding fracturing device for coal mine gas extraction wells according to claim 1, characterized in that: Electromagnetic flow switches (16) are respectively installed on the first feed inlet (13), the second feed inlet (14) and the first discharge outlet (15). The electromagnetic flow switches (16) are used to control the flow of materials.

3. The sand fracturing device for coal mine gas extraction wells according to claim 2, characterized in that: The stirring unit (12) includes an outer rotating shaft (121), an inner rotating shaft (122), and a rotating structure (123). One end of the outer rotating shaft (121) is rotatably connected to the upper end of the housing (11), and the inner ring of the outer rotating shaft (121) is rotatably connected to the outer ring of the inner rotating shaft (122). The rotating structure (123) is fixedly installed on the upper end of the housing (11) and is used to drive the outer rotating shaft (121) and the inner rotating shaft (122) to rotate.

4. The sand fracturing device for coal mine gas extraction wells according to claim 3, characterized in that: The outer rotating shaft (121) and the inner rotating shaft (122) have the same structure. One end of the outer rotating shaft (121) is rotatably connected to the upper end of the shell (11). The other end of the outer rotating shaft (121) is fixedly provided with multiple spiral stirring blades (1211), and the multiple spiral stirring blades (1211) are evenly distributed on the periphery of the outer rotating shaft (121).

5. The sand fracturing device for coal mine gas extraction wells according to claim 3, characterized in that: The rotating structure (123) includes a rotating motor (1231), a driving gear (1232), a first driven gear (1233), and a second driven gear (1234). The driving gear (1232) is fixedly mounted on the output shaft of the rotating motor (1231). The two sides of the driving gear (1232) are respectively meshed with the first driven gear (1233) and the second driven gear (1234). The driving gear (1232), the first driven gear (1233), and the second driven gear (1234) constitute a synchronous transmission structure. The first driven gear (1233) and the second driven gear (1234) are parallel to each other and arranged opposite each other. The first driven gear (1233) and the second driven gear (1234) are respectively fixedly connected to the periphery of one end of the outer rotating shaft (121) and the inner rotating shaft (122).

6. The sand-adding fracturing device for coal mine gas extraction wells according to claim 1, characterized in that: The storage component (2) includes a water tank (21) and a sand tank (22). The water tank (21) and the sand tank (22) are mounted on the support (4) and are located on both sides of the mixing component (1). The water tank (21) includes a water tank (211) and a first pipe (212). The water tank (211) is mounted on the support (4) and has a tapered end. One end of the water tank (211) is fixedly connected to one end of the first pipe (212), and the other end of the first pipe (212) is fixedly connected to the first feed inlet (13).

7. The fracturing device for coal mine gas extraction wells according to claim 6, characterized in that: The sand storage tank (22) includes a sand tank (221), a conveyor (222), a second pipe (223), and a rubber hose (224). The lower end of the sand tank (221) is a constricted structure, and the lower end of the sand tank (221) is equipped with a conveyor (222). The conveyor (222) is used to transport the sand inside the sand tank (221). The discharge end of the conveyor (222) is fixedly connected to one end of the second pipe (223). The other end of the second pipe (223) is connected to one end of the rubber hose (224). The other end of the rubber hose (224) is connected to the second feed port (14). The two ends of the rubber hose (224) are respectively equipped with hoops (2241). The hoops (2241) are used to limit the relative position of the rubber hose (224).

8. The sand fracturing device for coal mine gas extraction wells according to claim 6, characterized in that: The sand storage tank (22) also includes a vibrator (225), which is fixedly installed on the outer wall of the second pipe (223) and is used to clear the sand in the second pipe (223).

9. The sand fracturing device for coal mine gas extraction wells according to claim 1, characterized in that: The fracturing pump (3) is provided with a third feed port (31), which is fixedly connected to the first discharge port (15). The fracturing pump (3) is provided with a second discharge port (32) on one side, which outputs the fracturing fluid in the mixing component (1) to the well through a high-pressure pipe.

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