A device for coal transportation dust pretreatment

Abstract

The present application relates to coal dust fall technical field, especially a kind of coal transport dust pretreatment device, including, conveying assembly, it includes conveyor to carry out transportation to coal, and water pipe is arranged above the conveyor;Pretreatment component is arranged on the water pipe to play the role of water spray dust fall to the coal transported, the pretreatment component includes the connecting pipe being communicated with the water pipe, at least one nozzle body is installed in the connecting pipe bottom.This application has the beneficial effect that by adding pretreatment component, nozzle is not used, pretreatment component can automatically shield nozzle, effectively avoid external dust adhering to nozzle to form dirt, so as to ensure the dust fall efficiency of nozzle, secondly, by adding pretreatment component, it utilizes the kinetic energy generated when water flow flows, drives driven fan to rotate, on the one hand, the diffusion range and speed of water mist can be improved, on the other hand, the airflow formed by fan can further prevent dust rising.

Description

Technical Field

[0001] This invention relates to the field of coal dust control technology, and in particular to a dust pretreatment device for coal transportation. Background Technology

[0002] Coal is the most abundant and widely distributed fossil fuel on Earth. Coal mining is mostly carried out in underground mines, and after extraction, coal needs to be transported to various locations. However, the transportation process generates a large amount of dust. Excessive dust concentration can shorten the lifespan of transportation equipment and also affect the health of workers.

[0003] Existing dust control methods for coal transportation typically involve spraying water through nozzles for pretreatment and dust suppression. However, when the nozzles are closed, external dust easily adheres to the nozzles and mixes with residual water droplets, forming stubborn dirt that affects the normal use of the nozzles and reduces dust suppression efficiency. Summary of the Invention

[0004] In this section, as well as in the abstract and title of this application, some simplifications or omissions may be made to avoid obscuring the purpose of this section, the abstract, and the title of this application, and such simplifications or omissions shall not be used to limit the scope of the invention.

[0005] The purpose of this invention is to provide a dust pretreatment device for coal transportation.

[0006] Therefore, its purpose is to solve the problem that external dust easily adheres to the nozzle and mixes with residual water droplets on the nozzle to form stubborn dirt, thereby affecting the normal use of the nozzle and the efficiency of dust suppression.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a dust pretreatment device for coal transportation, comprising a conveying assembly, including a conveyor for transporting coal, and a water pipe disposed above the conveyor;

[0008] A pretreatment component is installed on the water pipe to spray water to reduce dust on the transported coal. The pretreatment component includes a connecting pipe that communicates with the water pipe. At least one nozzle body is installed at the bottom of the connecting pipe, and a shielding part is installed on the connecting pipe to shield the nozzle body.

[0009] As a preferred embodiment of the present invention for a dust pretreatment device for coal transportation, wherein: a piston is slidably connected inside the connecting pipe, a fixing frame is provided below the piston and fixedly connected to the inner wall of the connecting pipe, a compression spring is abutted between the fixing frame and the piston, and the piston is sealed against the protrusion on the inner wall of the connecting pipe under the push of the compression spring.

[0010] As a preferred embodiment of the present invention for a dust pretreatment device for coal transportation, wherein: a connecting rod is rotatably connected to the middle of the piston, the bottom of the connecting rod movably passes through the fixed frame and the connecting pipe, and a shielding part is installed on the outer side of the part of the connecting rod that passes through the connecting pipe.

[0011] As a preferred embodiment of the present invention for a dust pretreatment device for coal transportation, wherein: both ends of the shielding part are fixedly installed with fixing rings, and the fixing rings are sleeved on the outside of the connecting rod; the shielding part is provided with multiple pairs of symmetrically distributed bending plates, and the bending plate is provided with a bending part in the middle to control the bending plate to bend in a preset direction.

[0012] As a preferred embodiment of the present invention for a dust pretreatment device for coal transportation, wherein: a driven fan fixedly connected to a connecting rod is provided below the shielding part, the diameter of the driven fan blades is larger than the outer diameter of the connecting pipe, and the connecting pipe blades are made of metal or plastic material.

[0013] As a preferred embodiment of the present invention for a dust pretreatment device for coal transportation, wherein: a driven shaft is fixedly installed on the outside of the connecting rod, and the driven shaft is located inside the connecting pipe, and multiple pairs of helical blades are fixed on the outside of the driven shaft.

[0014] As a preferred embodiment of the present invention for a dust pretreatment device for coal transportation, wherein: the inner wall of the connecting pipe is provided with a guide groove for guiding water flow, and the guide groove is located at the water inlet end of the driven shaft to form a vortex.

[0015] As a preferred embodiment of the present invention for a dust pretreatment device for coal transportation, each of the driven fan blades is provided with a cleaning component on its outer side for cleaning dust. The cleaning component includes a cleaning block sleeved on the driven fan blade, and the inner wall of the cleaning block is fixed with bristles for cleaning the surface of the driven fan.

[0016] As a preferred embodiment of the present invention for a dust pretreatment device for coal transportation, wherein: a groove is provided on the outer side of the driven fan blade to guide the movement direction of the cleaning block, and a push spring for abutting the cleaning block is installed inside the groove.

[0017] As a preferred embodiment of the present invention for a dust pretreatment device for coal transportation, wherein: the cleaning block and the fixing ring have fixing rings embedded in their opposite surfaces, the two fixing rings have opposite magnetic properties, and the two fixing rings are located on the same horizontal plane.

[0018] The beneficial effects of the dust pretreatment device for coal transportation of the present invention are as follows: by adding a pretreatment component, the pretreatment component can automatically block the nozzle when it is not in use, effectively preventing external dust from adhering to the nozzle and forming dirt, thereby ensuring the dust reduction efficiency of the nozzle. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the dust pretreatment device for coal transportation in this invention.

[0021] Figure 2 This is a three-dimensional structural diagram of the pretreatment component of the coal transportation dust pretreatment device of the present invention.

[0022] Figure 3 This is a partial cross-sectional three-dimensional structural schematic diagram of the pretreatment component of the coal transportation dust pretreatment device of the present invention.

[0023] Figure 4 This is a three-dimensional exploded view of the connecting pipe of the dust pretreatment device for coal transportation in this invention.

[0024] Figure 5 This is a three-dimensional structural diagram illustrating the shrinkage of the shielding part in the dust pretreatment device for coal transportation according to the present invention.

[0025] Figure 6 This is a three-dimensional exploded view of the shielding part of the dust pretreatment device for coal transportation in this invention.

[0026] Figure 7 This is a three-dimensional structural diagram of the cleaning component of the dust pretreatment device for coal transportation in this invention.

[0027] Figure 8 This is an exploded three-dimensional structural diagram of the cleaning component of the dust pretreatment device for coal transportation in this invention.

[0028] In the picture:

[0029] 100. Conveying assembly; 101. Conveyor; 102. Water pipe;

[0030] 200. Pretreatment component; 201. Connecting pipe; 202. Shielding part; 203. Driven fan; 204. Nozzle body;

[0031] 201a, Piston; 201b, Compression Spring; 201c, Fixture; 201d, Connecting Rod;

[0032] 201d-1, Driven Shaft;

[0033] 202a, retaining ring; 202b, bending plate;

[0034] 300. Cleaning component; 301. Cleaning block; 302. Push spring; 303. Magnetic block. Detailed Implementation

[0035] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0037] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0038] Example 1

[0039] Reference Figure 1-6 This is the first embodiment of the present invention. This embodiment provides a dust pretreatment device for coal transportation, including a conveying assembly 100, which includes a conveyor 101 for transporting coal and a water pipe 102 disposed above the conveyor 101; the conveyor 101 realizes continuous transportation of coal through a conveyor belt.

[0040] A pretreatment component 200, installed on the water pipe 102, is used to spray water to suppress dust on transported coal. The pretreatment component 200 includes a connecting pipe 201 connected to the water pipe 102. At least one nozzle body 204 is installed at the bottom of the connecting pipe 201, and a shielding part 202 is installed on the connecting pipe 201 to shield the nozzle body 204. By adding the pretreatment component 200, when the nozzle is not in use, the pretreatment component 200 can automatically shield the nozzle, effectively preventing external dust from adhering to the nozzle and forming dirt, thereby ensuring the dust suppression efficiency of the nozzle.

[0041] Furthermore, a piston 201a is slidably connected inside the connecting pipe 201. Below the piston 201a is a fixing bracket 201c fixedly connected to the inner wall of the connecting pipe 201. A compression spring 201b abuts against the fixing bracket 201c and the piston 201a, and the piston 201a is sealed against the protrusion on the inner wall of the connecting pipe 201 under the force of the compression spring 201b. A connecting rod 201d is rotatably connected to the middle of the piston 201a. Since the piston 201a and connecting rod 201d are rotatably connected, the connecting rod 201d will not interfere with the piston 201a when rotating, effectively ensuring rotational stability. The bottom of the connecting rod 201d movably passes through the fixing bracket 201c and the connecting pipe 201, and a shielding part 202 is installed on the outer side of the portion of the connecting rod 201d that passes through the connecting pipe 201. When the water pressure in the connecting pipe 201 is greater than the elastic force of the compression spring 201b, the piston 201a will contract and slide under the push of the water flow. On the one hand, the water flow can be discharged from the nozzle body 204 to achieve the effect of dust reduction. On the other hand, the sliding connecting rod 201d can reduce the pressure on the blocking part 202. Therefore, the blocking part 202 will contract and recover under its own elasticity and no longer block the nozzle body 204.

[0042] Both ends of the shielding part 202 are fixedly installed with fixing rings 202a, and the fixing rings 202a are sleeved on the outside of the connecting rod 201d. The fixing ring 202a located at the top is fixedly connected to the connecting pipe 201 to improve the stability during use.

[0043] The shielding part 202 has multiple pairs of symmetrically distributed bent plates 202b inside, and the bent plates 202b have a bending part in the middle to control the bending of the bent plates 202b in a preset direction. Thus, they are squeezed into a flat shape, which provides good shielding and protection. Moreover, the shielding part 202 is made of rubber material, so it can automatically recover when no force is applied, so as not to interfere with the spraying of the nozzle body 204.

[0044] Existing dust removal methods for coal transportation typically involve pre-treatment with water spraying from nozzles. However, when the nozzles are closed, external dust tends to adhere to the nozzles and mix with residual water droplets, forming dirt and thus affecting the dust removal efficiency of the nozzles.

[0045] To solve the above problems, a pretreatment component 200 is added. When the nozzle is not in use, the pretreatment component 200 can automatically cover the nozzle, effectively preventing external dust from adhering to the nozzle and forming dirt, thereby ensuring the dust reduction efficiency of the nozzle.

[0046] Specifically, during use, an external water pump draws liquid into the connecting pipe 201. When the water pressure in the connecting pipe 201 is greater than the elastic force of the compression spring 201b, the piston 201a will contract and slide under the push of the water flow. On the one hand, the water flow can be discharged from the nozzle body 204 to achieve the effect of dust suppression. On the other hand, the sliding connecting rod 201d can reduce the pressure on the blocking part 202. Therefore, the blocking part 202 will contract and recover under its own elasticity and no longer block the nozzle body 204, effectively ensuring the spraying range of the nozzle body 204.

[0047] When the water pump is turned off, the water pressure inside the connecting pipe 201 decreases, so the piston 201a will abut against the boss and seal under the push of the compression spring 201b. At the same time, the piston 201a drives the connecting rod 201d to squeeze the shielding part 202, causing the shielding part 202 to deform into a flat shape under pressure and fit against the nozzle body 204, thus playing a shielding and protective role and effectively isolating external dust.

[0048] It should be noted that the bending plate 202b is made of elastic metal or plastic material. When it is squeezed, it will bend in a preset direction through the bending part. Therefore, under the constraint of the bending plate 202b, the shielding part 202 will be squeezed into a flat shape, which has a good shielding and protection effect. In addition, the shielding part 202 is made of rubber material, so it can automatically recover when no force is applied, so as not to interfere with the spraying of the nozzle body 204.

[0049] Example 2

[0050] Reference Figure 3-6 This is the second embodiment of the present invention, which differs from the previous embodiment in that it also includes...

[0051] By adding a pretreatment component 200, the kinetic energy generated by the water flow is used to drive the driven fan 203 to rotate. This improves the diffusion range and speed of the water mist, and the airflow generated by the fan further prevents dust from rising. A driven fan 203, fixedly connected to the connecting rod 201d, is located below the shielding part 202. The blade diameter of the driven fan 203 is larger than the outer diameter of the connecting pipe 201, and the blades of the connecting pipe 201 are made of metal or plastic. A driven shaft 201d-1 is fixedly installed on the outside of the connecting rod 201d, and is located inside the connecting pipe 201. Multiple pairs of spiral blades are fixed on the outside of the driven shaft 201d-1. A guide groove is formed on the inner wall of the connecting pipe 201 to guide the water flow, and the guide groove is located at the water inlet end of the driven shaft 201d-1 to form a vortex. The vortex increases the driving force on the driven shaft 201d-1, making its rotation more stable.

[0052] Because existing nozzles cannot enhance the spray range when spraying water, the spray range is small, which affects the dust suppression effect.

[0053] To solve the above problems, a pretreatment component 200 is added, which uses the kinetic energy generated by the water flow to drive the driven fan 203 to rotate. On the one hand, this can improve the diffusion range and speed of the water mist, and on the other hand, the airflow formed by the fan can further prevent dust from rising, thereby effectively avoiding the problem of dust adhering to the nozzle body 204.

[0054] Specifically, when water flows inside the connecting pipe 201, the driven shaft 201d-1 will drive the connecting rod 201d to rotate under the push of the water flow, and the connecting rod 201d will drive the driven fan 203 to rotate. When the driven fan 203 rotates, it generates a downward airflow. On the one hand, it can improve the diffusion range and speed of the water mist. On the other hand, the airflow formed by the fan can further prevent dust from rising, thereby effectively avoiding the problem of dust adhering to the nozzle body 204.

[0055] It should be noted that the piston 201a is rotatably connected to the connecting rod 201d, so the connecting rod 201d will not interfere with the piston when it rotates, thus effectively ensuring the stability of the rotation.

[0056] Secondly, the retaining ring 202a is sleeved on the outside of the connecting rod 201d, so it will not rotate with the connecting rod 201d, thereby improving the stability of use.

[0057] Finally, a guide groove is provided on the inner wall of the connecting pipe 201 to guide the flow of water. The guide groove is located at the water inlet end of the driven shaft 201d-1 to form a vortex. The vortex can increase the driving force on the driven shaft 201d-1, making its rotation more stable.

[0058] Example 3

[0059] Reference Figure 7-8 This is the third embodiment of the present invention, which further provides a dust pretreatment device for coal transportation. It includes a cleaning component 300 on the outer side of each driven fan 203 blade for cleaning dust. The cleaning component 300 includes a cleaning block 301 sleeved on the driven fan 203 blade, with bristles fixed to the inner wall of the cleaning block 301 for cleaning the surface of the driven fan 203. A groove is formed on the outer side of the driven fan 203 blade to guide the movement direction of the cleaning block 301, and a push spring 302 is installed inside the groove to abut against the cleaning block 301. When two magnetic blocks 303 are not aligned, the cleaning block 301 will return to its original position under the elastic force of the push spring 302, achieving a reciprocating cleaning effect.

[0060] The cleaning block 301 and the fixing ring 202a each have a fixing ring 202a embedded in their opposite surfaces. The two fixing rings 202a have opposite magnetic properties and are located on the same horizontal plane. When the cleaning block 301 aligns with the magnetic block 303 on the fixing ring 202a, the cleaning block 301 will slide under the action of magnetic repulsion. When the cleaning block 301 slides, the brush bristles will clean the adhering dust.

[0061] Because dust easily adheres to the surface of the driven fan 203 during use, it not only makes the blade surface rough, increasing air resistance and reducing the fan's wind power, but also accelerates the wear of the blades.

[0062] To solve the above problems, a cleaning component 300 is added to clean the dust on the surface of the driven fan 203, thereby solving the problem that dust causes the blade surface to become rough, increases air resistance, reduces the fan's wind power, and accelerates blade wear.

[0063] Specifically, when the driven fan 203 first starts rotating, its initial speed is relatively slow. Therefore, when the cleaning block 301 corresponds to the magnetic block 303 on the fixing ring 202a, the cleaning block 301 will slide under the action of magnetic repulsion. As the cleaning block 301 slides, the bristles clean the adhering dust. When the two magnetic blocks 303 do not correspond, the cleaning block 301 will return to its original position under the action of the spring 302, achieving a reciprocating cleaning effect. After the driven fan 203 rotates a few times and reaches the preset speed, the multiple cleaning blocks 301 will overcome the spring force of the spring 302 under the action of centrifugal force, so the cleaning blocks 301 will slide to the farthest end to avoid interfering with the rotation of the driven fan 203. The cleaning block 301 is made of lightweight plastic material.

[0064] Secondly, the grooves constrain and guide the sliding of the cleaning block 301, making the sliding of the cleaning block 301 more stable.

[0065] In summary, during use, an external water pump draws liquid into the connecting pipe 201. When the water pressure inside the connecting pipe 201 exceeds the elastic force of the compression spring 201b, the piston 201a will contract and slide under the push of the water flow. On the one hand, the water flow can be discharged from the nozzle body 204 to the outside, achieving the effect of dust suppression. On the other hand, the sliding connecting rod 201d can reduce the pressure on the shielding part 202. Therefore, the shielding part 202 will contract and recover under its own elasticity, no longer shielding the nozzle body 204, effectively ensuring the spraying range of the nozzle body 204. When the water pump is turned off, the water pressure inside the connecting pipe 201 decreases. Therefore, the piston 201a will abut against the boss and seal under the push of the compression spring 201b. At the same time, the piston 201a drives the connecting rod 201d to squeeze the shielding part 202, causing the shielding part 202 to deform into a flat shape under pressure and fit against the nozzle body 204, playing a shielding and protective role and effectively isolating external dust.

[0066] When water flows inside the connecting pipe 201, the driven shaft 201d-1 will drive the connecting rod 201d to rotate under the push of the water flow, and the connecting rod 201d will drive the driven fan 203 to rotate. When the driven fan 203 rotates, it generates a downward airflow. On the one hand, it can improve the diffusion range and speed of water mist. On the other hand, the airflow formed by the fan can further prevent dust from rising, thereby effectively avoiding the problem of dust adhering to the nozzle body 204.

[0067] When the driven fan 203 starts to rotate, its initial speed is relatively slow. Therefore, when the cleaning block 301 corresponds to the magnetic block 303 on the fixed ring 202a, the cleaning block 301 will slide under the action of magnetic repulsion. When the cleaning block 301 slides, the brush bristles will clean the adhering dust. When the two magnetic blocks 303 do not correspond, the cleaning block 301 will return to its original position under the action of the push spring 302, achieving a reciprocating cleaning effect. After the driven fan 203 rotates a few times and reaches the preset speed, the multiple cleaning blocks 301 will overcome the elasticity of the push spring 302 under the action of centrifugal force. Therefore, the cleaning block 301 will slide to the farthest end to avoid its own sliding interfering with the rotation of the driven fan 203.

[0068] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0069] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0070] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0071] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A dust pretreatment device for coal transportation, characterized in that: include, The conveying assembly (100) includes a conveyor (101) for transporting coal and a water pipe (102) disposed above the conveyor (101). A pretreatment component (200) is installed on the water pipe (102) to spray water to reduce dust on the transported coal. The pretreatment component (200) includes a connecting pipe (201) connected to the water pipe (102). At least one nozzle body (204) is installed at the bottom of the connecting pipe (201). A shielding part (202) is installed on the connecting pipe (201) to shield the nozzle body (204). A piston (201a) is slidably connected inside the connecting pipe (201). A fixing bracket (201c) is provided below the piston (201a) and is fixedly connected to the inner wall of the connecting pipe (201). A compression spring (201b) abuts between the fixing bracket (201c) and the piston (201a). Under the elastic force of the compression spring (201b), the piston (201a) abuts against the protrusion on the inner wall of the connecting pipe (201) and seals it. The piston (201a) is rotatably connected to a connecting rod (201d) in the middle. The bottom of the connecting rod (201d) movably passes through the fixing frame (201c) and the connecting pipe (201), and a shielding part (202) is installed on the outer side of the part of the connecting rod (201d) that passes through the connecting pipe (201). Both ends of the shielding part (202) are fixedly installed with fixing rings (202a), and the fixing rings (202a) are sleeved on the outside of the connecting rod (201d). The fixing ring (202a) at the top is fixedly connected to the connecting pipe (201). The shielding part (202) is provided with multiple pairs of symmetrically distributed bending plates (202b), and the bending plate (202b) is provided with a bending part in the middle to control the bending plate (202b) to bend in a preset direction. The shielding part (202) is made of rubber material. Under pressure, the shielding part (202) deforms into a flat shape and fits into the nozzle body (204). When no force is applied, it can automatically recover to avoid interfering with the spraying of the nozzle body (204). When the water pressure in the connecting pipe (201) is greater than the elastic force of the compression spring (201b), the piston (201a) will contract and slide under the push of the water flow. On the one hand, the water flow can be discharged outward from the nozzle body (204), and on the other hand, the sliding connecting rod (201d) can reduce the pressure on the blocking part (202). The blocking part (202) will contract and recover under its own elasticity and no longer block the nozzle body (204).

2. The dust pretreatment device for coal transportation as described in claim 1, characterized in that: Below the shielding part (202) is a driven fan (203) fixedly connected to the connecting rod (201d). The diameter of the blades of the driven fan (203) is larger than the outer diameter of the connecting pipe (201). The blades of the driven fan (203) are made of metal or plastic materials.

3. The dust pretreatment device for coal transportation as described in claim 2, characterized in that: A driven shaft (201d-1) is fixedly installed on the outside of the connecting rod (201d), and the driven shaft (201d-1) is located inside the connecting pipe (201). Multiple pairs of helical blades are fixed on the outside of the driven shaft (201d-1).

4. The dust pretreatment device for coal transportation as described in claim 3, characterized in that: The inner wall of the connecting pipe (201) is provided with a guide groove for guiding water flow, and the guide groove is located at the water inlet end of the driven shaft (201d-1) to form a vortex.

5. The dust pretreatment device for coal transportation as described in claim 2, characterized in that: Each of the driven fan (203) blades is provided with a cleaning component (300) on the outer side to clean dust. The cleaning component (300) includes a cleaning block (301) sleeved on the driven fan (203) blade. The inner wall of the cleaning block (301) is fixed with bristles for cleaning the surface of the driven fan (203).

6. The dust pretreatment device for coal transportation as described in claim 5, characterized in that: The outer side of the blades of the driven fan (203) is provided with a groove to guide the movement direction of the cleaning block (301), and a push spring (302) is installed inside the groove to abut against the cleaning block (301).

7. The dust pretreatment device for coal transportation as described in claim 6, characterized in that: The cleaning block (301) and the fixing ring (202a) each have a magnetic block (303) embedded in their opposite surfaces. The two magnetic blocks (303) have opposite magnetic properties and are located on the same horizontal plane.

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