An on-board dust extractor for a coal mining machine

Abstract

The present application belongs to the technical field of coal mine dust removal. It relates to a shearer-mounted dust remover, which comprises an air inlet cylinder arranged in a protective shell; one end of the air inlet cylinder extends out of the protective shell, and an air inlet is arranged on the side wall close to the end; a wind deflector is arranged at the end of the protective shell away from the air inlet; a double-impeller mechanism, a dust filter screen and a dehydrator are arranged in sequence between the air inlet cylinder and the wind deflector; water-containing airflow enters through the air inlet, and then passes through the double-impeller mechanism, the dust filter screen and the dehydrator in sequence for dust removal and dehydration, and finally is discharged from the wind deflector; a connecting arm is arranged on the protective shell and is connected with the shearer body through the connecting arm; the air inlet cylinder and the drum are arranged in parallel; the air inlet is located on the side of the rocker arm close to the coal wall; the wind deflector is located on the side of the rocker arm away from the coal wall, and the air outlet direction of the wind deflector is towards the coal wall side, so that the air outlet forms a wind curtain barrier between the shearer and the coal wall, controls the diffusion of the coal cutting dust source of the shearer, and purifies the airflow of the fully-mechanized coal mining face.

Description

Technical Field

[0001] This invention belongs to the field of coal mine dust removal technology and relates to an onboard dust collector for coal mining machines, used for the control of dust generated by coal cutting in fully mechanized mining faces. Background Technology

[0002] Dust generated by coal cutting machines is the main dust source in fully mechanized mining faces. While coal cutting machines are equipped with internal spray systems to address this dust, these systems often become clogged after a period of normal use, resulting in poor dust suppression. Dust-collecting rollers have been researched for coal cutting dust, but their application has not been widely adopted. With the increasing prevalence of high-extraction fully mechanized mining faces, the mining area is large, and the intensity of dust generation from coal cutting is high. Besides spray systems, there are no other effective dust suppression measures for coal cutting dust, making its control a major challenge. Combining ample mining space with dust collector technology, dust collector technology and equipment have become a hot topic. However, the compatibility between the dust collector and the coal cutting machine directly affects the dust suppression effect, applicability, and reliability of the dust collector. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to overcome the above-mentioned shortcomings and provide a dust collector on a coal mining machine.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A dust collector for a coal mining machine includes an air inlet cylinder housed within a protective casing. One end of the air inlet cylinder extends out of the protective casing, and an air inlet is provided on the side wall near that end to allow airflow to enter from the side wall of the air inlet cylinder. A guide plate is provided at the end of the protective casing away from the air inlet. A double impeller mechanism, a dust filter, and a dehydrator are sequentially arranged between the air inlet cylinder and the guide plate. Water-containing airflow enters through the air inlet and passes through the double impeller mechanism, the dust filter, and the dehydrator in sequence for dust removal and dehydration, and finally exits from the guide plate.

[0006] The protective shell is equipped with a connecting arm, which is connected to the coal mining machine body. The air inlet cylinder is arranged in parallel with the drum, and the air inlet is located on the side of the rocker arm closer to the coal wall. The air guide plate is located on the side of the rocker arm away from the coal wall, and the air outlet direction of the air guide plate is towards the coal wall, so that the air outlet forms an air curtain barrier between the coal mining machine and the coal wall, controlling the diffusion of coal cutting dust source of the coal mining machine.

[0007] Furthermore, the dual-impeller mechanism includes a motor, a power impeller, a dehydration impeller, and a connecting shaft; the motor is fixedly mounted inside the protective shell via a bracket; the power impeller is fixedly mounted on the connecting shaft, one end of which is connected to the motor, and the other end is rotatably connected to the dehydration impeller; the power impeller draws in dust-laden airflow from the air inlet and mixes it with sprayed water; the dehydration impeller is fixed inside the protective shell and does not rotate with the power impeller; the dehydration impeller includes a sleeve and multiple spiral blades evenly distributed on the sleeve wall in a circular pattern; the connecting shaft is rotatably mounted inside the sleeve; the spiral blades are fixed inside the protective shell, dividing the flow channel into multiple spiral flow channels. When the water-laden airflow enters the dehydration impeller, a spiral airflow is formed, and small water droplets are condensed by the airflow into large water droplets, causing them to undergo centrifugal motion under the rotation of the dehydration impeller, thereby separating them from the airflow.

[0008] Furthermore, the power impeller includes a power hub and power blades; the power blades are evenly distributed circumferentially on the side wall of the power hub; the power hub is connected to a connecting shaft.

[0009] Furthermore, the dewatering device includes a dewatering cylinder and a filter screen, with the filter screen fixedly installed inside the dewatering cylinder. The filter screen has several spaced airflow channels, and the coal sludge separated by rotation is blocked by the dust filter screen. Both the coal sludge and water enter the dewatering device, and the purified airflow enters the air guide plate through the airflow channels.

[0010] Furthermore, the air intake cylinder includes an air intake cylinder body and a crash barrier; the crash barrier is located at one end of the air intake cylinder body, sealing one end of the air intake cylinder body; the air inlet is located at the end of the air intake cylinder body near the crash barrier, and the air inlet is provided with an air intake grille; the crash barrier is detachably connected to the air intake cylinder body.

[0011] Furthermore, the air intake cylinder is also equipped with a flow guide shroud, which is arc-shaped along the airflow direction, so that the intake airflow forms laminar flow after passing through the flow guide, reducing eddies.

[0012] Furthermore, the air inlet is strip-shaped. Changing the air inlet from a straight-through type to a strip-shaped inlet reduces the possibility of coal entering the air intake cylinder.

[0013] Furthermore, the on-board dust collector of the coal mining machine rises and falls synchronously with the drum, and the on-board dust collector is connected to the control system of the coal mining machine and is controlled by the control system of the coal mining machine, so as to realize synchronous control of coal mining and dust removal without the need for additional control equipment.

[0014] Further, the connecting arm is matched with the installation position of the crusher supporting the coal mining machine, so that the dust collector on the coal mining machine can replace the crusher, enabling the coal mining machine to crush coal at one end and suck and purify at the other end, or installing dust collectors on both ends of the coal mining machine for sucking and purifying. The connecting arm also serves as the connection channel for the water and circuit between the fuselage of the coal mining machine and the dust collector on the coal mining machine, facilitating the fixing and protection of pipelines.

[0015] Further, when the dust collector on the coal mining machine replaces the crusher, separate lifting control is achieved through the original lifting mechanism of the crusher.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1) The dust collector on the coal mining machine in the present invention can efficiently control the dust generated by the coal cutting drum of the coal mining machine, increasing the matching rationality between the coal mining machine and the high-efficiency filtration and dust removal device. At the same time, this type of high-efficiency filtration and dust removal device has anti-vibration performance, and can use its own protection and the original hydraulic system at the connection to reduce the impact of the coal flow on the device during coal mining, improving the applicability of the device, effectively reducing the dust concentration in the fully mechanized coal mining face, and purifying the air flow in the fully mechanized coal mining face.

[0018] 2) The present invention can be replaced with the crusher supporting the coal mining machine, connected to the fuselage of the coal mining machine, and lifted using the original lifting system. It can cooperate with the crusher. When there is a crusher installed at one end of the coal mining machine to crush coal, a dust collector is installed at the other end to suck and purify the accumulated dust. When the function of crushing coal is not needed or the demand is very low, the dust collector on the coal mining machine can completely replace the crusher supporting the coal mining, improving the dust removal efficiency. The present invention realizes the function of crushing while sucking and purifying the dust in the coal cutting drum area of the coal mining machine, and can also control the dust collector on the coal mining machine through the control system of the coal mining machine itself, achieving the follow-up treatment of the coal cutting dust source of the coal mining machine and solving the problem of dust pollution.

[0019] Other advantages, objectives, and features of the present invention will be described in part in the subsequent specification, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be learned from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be described in detail preferably with reference to the accompanying drawings, where:

[0021] Figure 1 is the explosion diagram of the dust collector on the coal mining machine in the present invention.

[0022] Figure 2 is the overall schematic diagram of the dust collector on the coal mining machine in the present invention.

[0023] Figure 3 This is a schematic diagram of the air intake cylinder structure in this invention.

[0024] Figure 4 This is a schematic diagram showing the installation relationship between the power impeller and the dewatering impeller in this invention.

[0025] Figure 5 This is a schematic diagram of the power impeller structure.

[0026] Figure 6 This is a schematic diagram of the dehydrator structure in this invention.

[0027] Figure 7 This is a schematic diagram of the installation of the onboard dust collector for the coal mining machine in this invention.

[0028] Figure 8 , 9 This is a schematic diagram showing the state of the onboard dust collector of the coal mining machine following the rise and fall of the drum in this invention.

[0029] Reference numerals: 1-Dust collector on the coal mining machine; 2-Coal mining machine body; 3-Left drum; 4-Right drum; 5-Scraper conveyor; 1.1-Air inlet; 1.2-Guide shroud; 1.3-Double impeller mechanism; 1.4-Protective shell; 1.5-Dust filter; 1.6-Dehydrator; 1.7-Air guide plate; 1.1.1-Bumper plate; 1.1.2-Air inlet grille; 1.1.3-Air inlet body; 1.3.1-Power impeller; 1.3.2-Connecting shaft; 1.3.3-Dehydrator impeller; 1.3.1.1-Power hub; 1.3.1.2-Power blades; 1.6.1-Dehydrator body; 1.6.2-Airflow channel; 1.6.3-Water filter. Detailed Implementation

[0030] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0031] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0032] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention 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. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0033] Please see Figures 1-9 This is an onboard dust collector for a coal mining machine, comprising an air inlet cylinder 1.1 installed inside a protective shell 1.4; one end of the air inlet cylinder 1.1 extends out of the protective shell 1.4, and an air inlet is provided on the side wall near that end so that airflow enters from the side wall of the air inlet cylinder 1.1; a guide plate 1.7 is provided at the end of the protective shell 1.4 away from the air inlet; a double impeller mechanism 1.3, a dust filter 1.5, and a dehydrator 1.6 are arranged sequentially between the air inlet cylinder 1.1 and the guide plate 1.7; the water-containing airflow enters through the air inlet and passes through the double impeller mechanism 1.3, the dust filter 1.5, and the dehydrator 1.6 in sequence for dust removal and dehydration, and finally exits from the guide plate 1.7. A connecting arm is welded onto the protective shell 1.4 and is connected to the rocker arm of the coal mining machine through the connecting arm; the air inlet 1.1 is arranged parallel to the drum, and the air inlet is located on the side of the rocker arm close to the coal wall; the air guide plate 1.7 is located on the side of the rocker arm away from the coal wall, and the air outlet direction of the air guide plate 1.7 is towards the coal wall, so that the air outlet forms an air curtain barrier between the coal mining machine and the coal wall, controlling the diffusion of coal cutting dust source of the coal mining machine.

[0034] The dual impeller mechanism 1.3 includes a motor, a power impeller 1.3.1, a dewatering impeller 1.3.3, and a connecting shaft 1.3.2. The motor is fixedly installed inside the protective shell 1.4 by a bracket. The power impeller 1.3.1 is fixedly mounted on the connecting shaft 1.3.2. One end of the connecting shaft 1.3.2 is connected to the motor, and the other end is rotatably connected to the dewatering impeller 1.3.3. The power impeller 1.3.1 draws in the dust-laden airflow from the air inlet and mixes it with the sprayed water.

[0035] The power impeller 1.3.1 includes a power hub 1.3.1.1 and power blades 1.3.1.2; the power blades 1.3.1.2 are evenly distributed circumferentially on the side wall of the power hub 1.3.1.1; the power hub 1.3.1.1 is connected to the connecting shaft 1.3.2; the dewatering impeller 1.3.3 is fixedly installed inside the protective shell 1.4 and does not rotate with the power impeller 1.3.1; the dewatering impeller 1.3.3 includes a sleeve and multiple spiral blades evenly distributed circumferentially on the sleeve wall; the connecting shaft 1.3.2 is rotatably installed inside the sleeve; the spiral blades are fixed inside the protective shell 1.4, dividing the flow channel into multiple spiral flow channels. When the water-containing airflow enters the dewatering impeller 1.3.3, a spiral airflow is formed, and small water droplets are condensed by the airflow to form large water droplets, which undergo centrifugal motion under the rotation of the dewatering impeller 1.3.3, thus separating from the airflow.

[0036] The dewatering device 1.6 includes a dewatering cylinder 1.6.1 and a water filter screen 1.6.3. The water filter screen 1.6.3 is fixedly installed inside the dewatering cylinder 1.6.1. The water filter screen 1.6.3 is provided with four spaced airflow channels 1.6.2. The coal sludge separated by rotation is blocked by the dust filter screen 1.5. Both the coal sludge and water enter the dewatering device 1.6. The purified airflow enters the air guide plate 1.7 through the airflow channels 1.6.2.

[0037] The intake duct 1.1 includes an intake duct body 1.1.3 and a crash barrier 1.1.1. The crash barrier 1.1.1 is installed at one end of the intake duct body 1.1.3 and is detachable, sealing one end of the intake duct body 1.1.3. The air inlet is located at the end of the intake duct body 1.1.3 near the crash barrier 1.1.1, and an air intake grille 1.1.2 is installed on the air inlet. A flow guide shroud 1.2 is also installed inside the intake duct 1.1, located in front of the power impeller 1.3.1. The flow guide shroud 1.2 is arc-shaped along the airflow direction, causing the incoming airflow to form laminar flow after passing through the guide, reducing turbulence. The air inlet is strip-shaped, reducing the possibility of coal chunks entering the intake duct 1.1.

[0038] The on-board dust collector 1 of the coal mining machine rises and falls synchronously with the drum, and the on-board dust collector 1 is connected to the control system of the coal mining machine and is controlled by the control system of the coal mining machine to achieve synchronous control of coal mining and dust removal without the need for additional control equipment.

[0039] Depending on the supporting conditions of the fully mechanized mining face, the on-board dust collector 1 of the coal mining machine can be matched with the right drum 4 or the left drum 3 of the coal mining machine. The on-board dust collector 1 of the coal mining machine is connected to the coal mining machine body 2 through the connecting arm. It can move along the scraper conveyor 5 with the coal mining machine body 2 and is controlled by the control system of the coal mining machine body 2 to realize the raising and lowering of the left and right drums 4 of the coal mining machine.

[0040] The connecting arm can also be matched with the installation position of the crusher that is matched with the coal mining machine, so that the coal mining machine's on-board dust collector 1 can replace the crusher and use the original lifting mechanism of the crusher for independent lifting. This allows the coal mining machine to crush coal at one end and extract and purify it at the other end, or the coal mining machine's on-board dust collector 1 can be installed at both ends for extraction and purification. The connecting arm also serves as a connection channel for the water and electrical circuits between the coal mining machine body 2 and the coal mining machine's on-board dust collector 1, which facilitates the fixing and protection of pipelines.

[0041] Finally, 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 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 collector mounted on a coal mining machine, characterized in that: The system includes an air intake cylinder housed within a protective casing; one end of the air intake cylinder extends out of the protective casing, and an air inlet is provided on the side wall near that end, allowing airflow to enter from the side wall of the air intake cylinder; a guide plate is provided at the end of the protective casing away from the air inlet, and a double impeller mechanism, a dust filter, and a dehydrator are sequentially arranged between the air intake cylinder and the guide plate; the water-containing airflow enters through the air inlet and passes through the double impeller mechanism, the dust filter, and the dehydrator in sequence for dust removal and dehydration, and finally exits from the guide plate; The protective shell is equipped with a connecting arm, which is connected to the body of the coal mining machine and moves up and down synchronously with the drum. The air inlet is arranged parallel to the drum, and the air inlet is located on the side of the rocker arm closer to the coal wall. The air guide plate is located on the side of the rocker arm away from the coal wall, and the air outlet of the air guide plate is towards the coal wall, so that the air outlet forms an air curtain barrier between the coal mining machine and the coal wall, controlling the diffusion of coal cutting dust from the coal mining machine. The dual-impeller mechanism includes a motor, a power impeller, a dewatering impeller, and a connecting shaft. The motor is fixedly mounted inside the protective housing via a bracket. The power impeller is fixedly mounted on the connecting shaft, with one end connected to the motor and the other end rotatably connected to the dewatering impeller. The power impeller draws in dust-laden airflow from the air inlet and mixes it with sprayed water. The dewatering impeller is fixed inside the protective housing and does not rotate with the power impeller. The dehydration impeller includes a sleeve and multiple spiral blades evenly distributed on the sleeve wall in a circular pattern; the connecting shaft is rotatably disposed inside the sleeve; the spiral blades are fixed inside the protective shell, dividing the flow channel into multiple spiral flow channels. When the water-containing airflow enters the dehydration impeller, a spiral airflow is formed, and small water droplets are condensed by the airflow into large water droplets, causing them to undergo centrifugal motion under the rotation of the dehydration impeller, thereby separating them from the airflow. The air intake cylinder includes an air intake cylinder body and a crash barrier; the crash barrier is located at one end of the air intake cylinder body, sealing one end of the air intake cylinder body; the air inlet is located at the end of the air intake cylinder body near the crash barrier, and the air inlet is provided with an air intake grille; the crash barrier is detachably connected to the air intake cylinder body. The connecting arm is matched with the installation position of the crusher that is matched with the coal mining machine, so that the on-board dust collector of the coal mining machine can replace the crusher, so that the coal is crushed at one end of the coal mining machine and purified by suction at the other end, or the on-board dust collector of the coal mining machine is installed at both ends for suction purification.

2. The onboard dust collector for a coal mining machine according to claim 1, characterized in that: The power impeller includes a power hub and power blades; the power blades are evenly distributed circumferentially on the side wall of the power hub; the power hub is connected to a connecting shaft.

3. The onboard dust collector for a coal mining machine according to claim 1, characterized in that: The dewatering device includes a dewatering cylinder and a filter screen, with the filter screen fixedly installed inside the dewatering cylinder. The filter screen has several spaced airflow channels. The coal sludge separated by rotation is blocked by the dust filter screen, and both the coal sludge and water enter the dewatering device. The purified airflow enters the air guide plate through the airflow channels.

4. The onboard dust collector for a coal mining machine according to claim 1, characterized in that: The air intake cylinder is also equipped with a flow guide shroud, which is arc-shaped along the airflow direction, so that the intake airflow forms laminar flow after passing through the flow guide, reducing eddies.

5. The onboard dust collector for a coal mining machine according to claim 1, characterized in that: The air inlet is strip-shaped.

6. The onboard dust collector for a coal mining machine according to claim 1, characterized in that: The onboard dust collector of the coal mining machine rises and falls synchronously with the drum, and the onboard dust collector is connected to the control system of the coal mining machine and is controlled by the control system of the coal mining machine.

7. The onboard dust collector for a coal mining machine according to claim 1, characterized in that: When the dust collector on the coal mining machine replaces the crusher, independent lifting control is achieved through the original lifting mechanism of the crusher.

Images