Crushing device for coal mine water pump

Abstract

The utility model relates to the field of coal mine drainage equipment, in particular to a crushing device for a coal mine water pump. The device comprises a device body, the device body comprises a plurality of device modules, each device module comprises a pipeline, a middle shaft is arranged in each pipeline, and an impeller is arranged on each middle shaft. According to the utility model, the crushing effect is better, original larger foreign matters are crushed into smaller particles after being continuously crushed by a plurality of device modules, and the smaller particles are entrained by water flow to enter the coal mine water pump without blocking or damaging a flow channel and parts in the pump body, so that the coal mine water pump can continuously and stably work. According to the utility model, no extra motor is needed for providing power, the water pump rotating shaft drives the middle shaft at one end of the crushing device welded and fixed with the water pump rotating shaft to start to rotate at a high speed, and the adjacent middle shafts are tightly connected through the bulges and the grooves, so that the power is sequentially transmitted to the middle shafts of all device modules, and the impellers on all the middle shafts synchronously rotate at a high speed.

Description

Technical Field

[0001] This utility model relates to the field of coal mine drainage equipment, specifically to a crushing device for coal mine water pumps. Background Technology

[0002] In coal mining operations, the timely drainage of underground water is crucial for safe production. However, the underground environment of coal mines is harsh, and when water pumps are operating, they are surrounded by a large amount of foreign objects such as rock fragments, coal chunks, and soil. These foreign objects are easily sucked into the pump body, often causing blockages in the pump's flow channels and significantly reducing pumping efficiency. More seriously, large foreign objects may directly impact critical components inside the pump body, such as the impeller and shaft seal, causing damage and rendering the pump unable to operate normally, requiring shutdown for repair or replacement of parts. This not only causes production interruptions in coal mines, resulting in huge economic losses, but also increases equipment maintenance costs and workload due to frequent repairs and replacements. Therefore, developing a device that can effectively break up foreign objects during the water pump's suction process is of great practical significance. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned problems and provide a crushing device for coal mine water pumps. To achieve the above objective, this utility model adopts the following technical solution:

[0004] A crushing device for a coal mine water pump includes a main body, which comprises several device modules connected concentrically. Each device module includes a pipe with a central shaft inside. An impeller is mounted on the central shaft. The central shafts of adjacent device modules are connected and fixed. One end of the central shaft of the main body is welded and fixed to the rotating shaft of the coal mine water pump. The central shaft drives the impeller to rotate through the rotating shaft.

[0005] When the coal mine water pump starts working, its rotating shaft drives the central shaft of the crushing device, which is welded and fixed to it, to rotate at high speed. Due to the tight connection between adjacent central shafts via protrusions and grooves, power is sequentially transmitted to the central shafts of each device module, causing the impellers on all central shafts to rotate synchronously at high speed. At this time, if the coal mine water pump inlet sucks in large pieces of coal, rock fragments, or other foreign objects, these objects first enter the pipe of the foremost device module and come into contact with the high-speed rotating impeller blades. Due to the sharp edges of the blades and the powerful impact force generated by the high-speed rotation, the foreign objects are initially cut and crushed. As the water flow continues to push the foreign objects to subsequent device modules, the number of impeller blades in the subsequent modules increases, enabling more fine and thorough crushing of the initially crushed foreign objects. After continuous crushing by multiple device modules, the originally larger foreign objects are broken into smaller particles. These smaller particles, carried by the water flow, enter the coal mine water pump without causing blockage or damage to the internal flow channels and components of the pump body, thus ensuring the continuous and stable operation of the coal mine water pump.

[0006] As an improvement, the impeller is provided with a plurality of blades, wherein there are at least three blades.

[0007] As an improvement, the number of fan blades on the device module gradually increases from far away to near the coal mine water pump.

[0008] As an improvement, support frames are provided at both ends of the pipe, and the support frames fix the pipe to the central axis.

[0009] As an improvement, the support frame is fixed to the inner wall of the pipe, a bearing is provided in the middle of the support frame, and the support frame is connected to the central shaft through the bearing.

[0010] As an improvement, one end of the central shaft is provided with a groove, and the other end of the central shaft is provided with a protrusion, with the protrusion and groove of the adjacent central shaft being fixed together.

[0011] As an improvement, flanges are provided at both ends of the pipeline, and adjacent device modules are connected and fixed through the flanges.

[0012] The advantages of this utility model are:

[0013] 1. The present invention has a good crushing effect. After continuous crushing by multiple device modules, the originally large foreign objects are crushed into smaller particles. These smaller particles enter the coal mine water pump under the influence of water flow, without causing blockage or damage to the flow channels and components inside the pump body, thus ensuring that the coal mine water pump can work continuously and stably.

[0014] 2. This utility model does not require an additional motor to provide power. The water pump shaft drives the central shaft of this crushing device, which is welded and fixed to it, to start rotating at high speed. Due to the tight connection between adjacent central shafts through protrusions and grooves, the power is transmitted to the central shaft of each device module in sequence, so that the impellers on all central shafts rotate synchronously at high speed. Attached Figure Description

[0015] Figure 1 This is a structural diagram of a crushing device for a coal mine water pump in Example 1.

[0016] Figure 2 This is a cross-sectional view of a crushing device for a coal mine water pump in Example 1.

[0017] The diagram is labeled as follows:

[0018] 1. Main body of the device; 2. Device module; 3. Pipeline; 4. Central shaft; 5. Impeller; 6. Fan blade; 7. Support frame; 8. Bearing; 9. Groove; 10. Protrusion; 11. Flange. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] In the description of the embodiments of this utility model, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they 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, terms such as "first," "second," and "third" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] Furthermore, the use of terms such as "horizontal," "vertical," and "sag" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0022] In the description of the embodiments of this utility model, "a plurality of" means at least two.

[0023] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 according to the specific circumstances.

[0024] The present invention will be described in detail below through specific embodiments to enable a better understanding of the present invention. However, the following embodiments do not limit the scope of protection of the present invention.

[0025] Example 1

[0026] This embodiment discloses a crushing device for coal mine water pumps.

[0027] like Figure 1 , Figure 2 As shown, this embodiment includes a device body 1, which includes three device modules 2. The device modules 2 are concentrically connected. Each device module 2 includes a pipe 3, and a central shaft 4 is provided inside the pipe 3. An impeller 5 is provided on the central shaft 4. The central shafts 4 of adjacent device modules 2 are connected and fixed. One end of the central shaft 4 of the device body 1 is welded and fixed to the rotating shaft of the coal mine water pump. The central shaft 4 drives the impeller 5 to rotate through the rotating shaft.

[0028] Each device module 2 includes a pipe 3 and a central shaft 4. The pipe 3 is made of high-strength, wear-resistant metal, and its inner diameter is determined according to the flow rate of the coal mine water pump and the size of the foreign objects to be processed, capable of accommodating a certain volume of water flow and foreign objects. The inner wall of the pipe 3 undergoes special wear-resistant treatment, such as spraying a wear-resistant coating or embedding wear-resistant ceramic plates, to extend the service life of the pipe 3 and resist the scraping and impact of foreign objects such as coal blocks and rocks.

[0029] The impeller 5 is provided with several fan blades 6, and there are at least three fan blades 6.

[0030] The number of fan blades 6 gradually increases from the farthest point to the nearest point on the device module 2 of the coal mine water pump.

[0031] The central shaft 4, located inside the pipe 3, is also made of high-strength metal. An impeller 5 is mounted on the central shaft 4. The impeller 5 is a key component for crushing foreign objects, and its material is a high-hardness, wear-resistant, and relatively tough alloy. Several blades 6 are evenly distributed on the impeller 5, with at least three blades per impeller 6. The number of blades 6 gradually increases from the furthest point to the nearest point on the coal mine water pump module 2. This design allows for more thorough and gradual crushing of foreign objects as the water flows through each module 2. The blades 6 are curved and streamlined, with sharp edges and a serrated structure, effectively cutting and crushing incoming foreign objects such as coal chunks and small rocks during high-speed rotation.

[0032] This embodiment has three device modules 2. The first device module 2 has three fan blades 6 on its impeller 5, the second device module 2 has four fan blades 6 on its impeller 5, and the third device module 2 has six fan blades 6 on its impeller 5. When the main drainage pump in the coal mine is working, the accumulated water containing a large amount of coal and rock fragments is pumped into this crushing device. After being crushed by the impellers 5 of each device module 2 in sequence, the size of the foreign particles entering the pump meets the normal working requirements of the pump body, avoiding drainage interruption caused by foreign objects clogging or damaging the pump body, and ensuring the safe production and normal operation of the coal mine.

[0033] Support frames 7 are installed at both ends of the pipe 3, and the support frames 7 fix the pipe 3 and the central shaft 4.

[0034] The support frame 7 is fixed to the inner wall of the pipe 3. A bearing 8 is provided in the middle of the support frame 7, and the support frame 7 is connected to the central shaft 4 through the bearing 8.

[0035] Support frames 7 are installed at both ends of the pipe 3, and are firmly fixed to the inner wall of the pipe 3. Their function is to support and fix the central shaft 4, ensuring that the central shaft 4 can rotate stably within the pipe 3. A bearing 8 is installed in the middle of the support frame 7, and the central shaft 4 is connected to the support frame 7 through the bearing 8. The bearing 8 is a high-temperature resistant and wear-resistant rolling bearing, which can reduce the frictional resistance of the central shaft 4 during rotation, ensure the flexibility and stability of the central shaft 4 during high-speed rotation, and extend the service life of the device.

[0036] One end of the central shaft 4 is provided with a groove 9, and the other end of the central shaft 4 is provided with a protrusion 10. The protrusion 10 of the adjacent central shaft 4 is fixed together with the groove 9.

[0037] Flanges 11 are provided at both ends of the pipeline 3, and adjacent device modules 2 are connected and fixed through flanges 11.

[0038] Adjacent device modules 2 are connected and fixed together by flanges 11 at both ends of the pipe 3. The flanges 11 are bolted together, which ensures a tight connection and facilitates disassembly and maintenance. One end of the central shaft 4 has a groove 9, and the other end has a protrusion 10. The protrusions 10 and grooves 9 of adjacent central shafts 4 are fixed together. This connection method ensures that the central shafts 4 of each device module 2 can be precisely coaxially connected, achieving synchronous high-speed rotation under the drive of the water pump shaft. This effectively transmits power to each impeller 5, making the entire device a coordinated whole.

[0039] The specific embodiments of this utility model have been described in detail above, but they are merely examples, and this utility model is not equivalent to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions to this utility model are also within the scope of this utility model. Therefore, all equivalent changes and modifications made without departing from the spirit and scope of this utility model should be covered within the scope of this utility model.

Claims

1. A crushing device for coal mine water pumps, characterized in that, The device includes a main body (1), which includes several device modules (2) that are concentrically connected. Each device module (2) includes a pipe (3) and a central shaft (4) inside the pipe (3). An impeller (5) is mounted on the central shaft (4). The central shafts (4) of adjacent device modules (2) are connected and fixed. One end of the central shaft (4) of the main body (1) is welded and fixed to the rotating shaft of a coal mine water pump. The central shaft (4) drives the impeller (5) to rotate through the rotating shaft.

2. The crushing device for a coal mine water pump according to claim 1, characterized in that, The impeller (5) is provided with a plurality of blades (6), and the blades (6) are at least three.

3. The crushing device for a coal mine water pump according to claim 2, characterized in that, The number of fan blades (6) on the device module (2) of the coal mine water pump gradually increases from far away to near.

4. A crushing device for a coal mine water pump according to claim 3, characterized in that, The pipe (3) is provided with support frames (7) at both ends, and the support frames (7) fix the pipe (3) and the central shaft (4).

5. A crushing device for a coal mine water pump according to claim 4, characterized in that, The support frame (7) is fixed to the inner wall of the pipe (3), and a bearing (8) is provided in the middle of the support frame (7). The support frame (7) is connected to the central shaft (4) through the bearing (8).

6. A crushing device for a coal mine water pump according to claim 5, characterized in that, One end of the central shaft (4) is provided with a groove (9), and the other end of the central shaft (4) is provided with a protrusion (10). The protrusion (10) of the adjacent central shaft (4) is fixed to the groove (9).

7. A crushing device for a coal mine water pump according to claim 6, characterized in that, The pipe (3) is provided with flanges (11) at both ends, and adjacent device modules (2) are connected and fixed through the flanges (11).

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