A dynamic tracking spray dust suppression device for coal mining machine

Abstract

The present invention belongs to the technical field of coal mine dust control. It relates to a dynamic tracking ejector spray dust reduction device for a shearer, which includes an ejector sprayer, a pulley mounting seat, a pulley, a support arm, and a support base; the ejector sprayer is fixedly arranged at one end of the support arm and is located outside the coal shearer drum; the other end of the support arm is rotatably connected to the support base; the support base is fixedly arranged on the body of the shearer; the pulley is rotatably arranged on the pulley mounting seat, and the pulley mounting seat is fixedly arranged on the outer shell of the coal shearer drum motor and is located above the support arm; a pulling rope is arranged on the pulley, one end of the pulling rope is fixedly connected to the support base, and the other end passes through the pulley and is fixedly connected to the support arm; the support arm is hoisted on the pulley through the pulling rope; when the coal shearer drum swings up and down, through the cooperation of the pulley and the pulling rope, the support arm is driven to swing, so that the position of the ejector sprayer changes dynamically with the coal shearer drum, and always closely tracks the drum to spray and prevent coal dust from escaping.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine dust control and relates to a dynamic tracking and injection spray dust reduction device for a coal mining machine. Background Art

[0002] The current dust control system for coal mining working faces, such as the dust source tracking system, is effective for ideal working faces without spalling, but due to the complexity of the system, the large number of electronic components, the large number of fault points, the large maintenance workload, and the lack of control over the spalling impact dust generated when the coal machine cuts the coal, a large number of studies have shown that the main causes of coal spalling and dust generation include: the crushing force between the pick and the coal wall when the coal machine cuts the coal, the low water content of the coal seam makes the coal seam easy to break, and the high mine pressure. The current dust control solutions include:

[0003] (1) High-pressure spray tracking dust reduction is adopted from the top of the bracket. The high-pressure spray of the bracket requires the addition of a high-pressure pump station with a power of 110KW motor and the laying of a pipeline of about 2 kilometers. The spray head is fixedly installed on the top of the bracket. When the coal machine is cutting coal, the drum moves up and down. Its dust source is in a dynamic state of change. In addition, the straight-line distance between the spray head and the drum of the coal machine is about 3 meters. The 3-meter-long spray mist is easily blown away by the wind in the tunnel and is difficult to reach the drum of the coal machine, so the dust reduction effect cannot reach the expected effect.

[0004] (2) A dust curtain is hung on the bracket to control dust. The dust curtain is mainly used to isolate the dust in space to prevent the dust from spreading over a large area. However, the dust reduction effect is not ideal, and the dust curtain will affect the driver's operating line of sight and the operation of the cable mobile maintenance worker. Summary of the invention

[0005] In view of this, the purpose of the present invention is to solve the problem of controlling the impact dust caused by coal wall cutting and coal flakes cutting, and to provide a dynamic tracking and induced spray dust reduction device for a coal mining machine.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A dynamic tracking induced spray dust reduction device for a coal mining machine comprises an induced sprayer, a pulley mounting seat, a pulley, a support arm, and a support seat; the induced sprayer is fixedly arranged at one end of the support arm and is located outside the drum of the coal mining machine; the other end of the support arm is rotatably connected to the support seat; the support seat is fixedly arranged on the coal mining machine body;

[0008] The pulley is rotatably mounted on the pulley mounting seat, and the pulley mounting seat is fixedly mounted on the housing of the coal machine drum motor and is located above the support arm;

[0009] A pull rope is provided on the pulley, one end of the pull rope is fixedly connected to the support seat, and the other end passes through the pulley and is fixedly connected to the support arm; the support arm is hoisted on the pulley through the pull rope; when the coal machine drum swings up and down, the pulley cooperates with the pull rope to drive the support arm to swing, so that the position of the ejector sprayer changes dynamically with the coal machine drum.

[0010] When the coal machine drum rises, the pulley follows the drum rocker arm to rise. At this time, the lateral distance between the pulley and the fixed support seat on the machine body becomes shorter. When the total length of the pull rope remains unchanged, the vertical distance between the pulley and the support arm becomes longer, and the center of the support arm will drop below the center of the drum, thereby driving the induced sprayer to drop below the center of the drum. The higher the rise, the greater the center drop, which can effectively avoid interference between the induced sprayer and the hydraulic support retracting shield plate, thereby ensuring the normal operation of the spray system.

[0011] When the end of the coal machine is performing bottom sweeping operations, the coal machine drum rotates downward and the pulley follows the drum rocker arm to swing downward. At this time, the lateral distance between the pulley and the fixed support seat will become longer. When the total length of the pull rope remains unchanged, the vertical distance between the pulley and the support arm will become shorter. The pull rope will pull the support arm relatively upward, higher than the center of the drum, effectively avoiding interference from the bridge turntable baffle and allowing the spray dust suppression device to operate normally.

[0012] Furthermore, the rotation center of the support arm is higher than the swing center of the coal machine drum.

[0013] Furthermore, the ejector sprayer includes a combined water inlet pipe, a universal ejector, and a universal ejector support frame; the universal ejector support frame is fixedly connected to the support arm; the universal ejector is connected to the combined water inlet pipe and is arranged on the universal ejector support frame.

[0014] Furthermore, the universal ejector comprises a spray head, an ejector cylinder, and a support frame; the ejector cylinder is rotatably arranged on the support frame through a pin shaft, and a locking nut is arranged at one end of the pin shaft, and the position of the ejector cylinder is locked by the locking nut;

[0015] The spray head is connected to the combined water inlet pipe and is fixed at one end of the ejection cylinder. The spray head sprays high-pressure water mist toward the other end of the ejection cylinder to reduce dust. Under the ejection effect of the high-pressure water mist, the air on the installation side of the spray head is sucked into the ejection cylinder by negative pressure and combined with the high-pressure water mist to form secondary dust reduction.

[0016] Furthermore, there are a plurality of universal ejectors, which are arranged side by side on the universal ejector support frame.

[0017] Furthermore, the spray direction of the universal ejector is that a part of the universal ejector sprays dust at the drum, and another part of the universal ejector sprays in the direction of the wind flow to guide the dust-laden wind flow toward the coal wall for natural sedimentation.

[0018] Furthermore, the distance between the ejector atomizer and the coal machine drum is less than 1.8 meters.

[0019] Furthermore, the ejector sprayer uses the coal machine's own cooling water as the spray water source.

[0020] Furthermore, the diameter of the coal machine drum is greater than 2.5 m.

[0021] The beneficial effects of the present invention are:

[0022] 1) The dynamic tracking induced spray dust suppression device of the coal mining machine of the present invention is adopted. When the coal mining machine is in the horizontal coal cutting state, the spray dust suppression device is directly opposite to the center of the coal mining machine drum; when the coal mining machine drum is raised, the lateral distance between the pulley and the fixed support seat on the machine body becomes shorter. Under the condition that the total length of the pull rope remains unchanged, the vertical distance between the pulley and the support arm becomes longer, and the center of the support arm will drop below the center of the drum, thereby driving the induced sprayer to drop below the center of the drum. The higher the rise, the greater the center drop, which can effectively avoid the interference between the induced sprayer and the hydraulic support to retract the shield plate; when the end of the coal mining machine performs the bottom sweeping operation, the coal mining machine drum rotates downward, and the pulley follows the drum rocker arm to swing downward. At this time, the lateral distance between the pulley and the fixed support seat will become longer. Under the condition that the total length of the pull rope remains unchanged, the vertical distance between the pulley and the support arm will become shorter. The pull rope pulls the support arm relatively upward, higher than the center of the drum, effectively avoiding the interference of the bridge turntable baffle, so that the spray dust suppression device can operate normally.

[0023] 2) The present invention utilizes the flexibility of the pull rope and the motion relationship between the two swing mechanisms to cleverly achieve dynamic tracking of the dust suppression device with the coal machine drum, successfully avoids two dangerous points when the coal machine is cutting coal, and ensures the normal operation of the spray system.

[0024] 3) The device is less than 1.8 meters away from the drum, and always closely follows the drum to spray to prevent coal dust from escaping. At the same time, there is no need to configure a high-pressure pump station with high investment costs, and the coal machine's own cooling water can be directly used to fully meet the spray requirements.

[0025] 4) The ejector spray head is of universal adjustable design. The angle of the ejector spray head can be adjusted according to the wind direction and wind speed on site, so that the coal dust is always controlled outside the cable trough of the coal mining machine. The coal dust is fully moistened with spray water to increase its mass, and it settles quickly under gravity operation. At the same time, the dust at the driver's side of the tunnel is introduced into the ejector tube through the ejector wind flow operation, and is fused with the spray at the ejector tube outlet and settled. Among them, the ejector air volume of a single ejector tube reaches 6m when the pressure water is 4MPa. 3 / min. And the spray flow is near the coal wall of the roadway, and the water mist will not drift to the sidewalk and affect the normal operation of the staff.

[0026] 5) The device of the present invention has low investment, simple operation, small maintenance workload, convenient installation, and can be widely used.

[0027] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0029] Figure 1 It is a schematic diagram of the installation of the dynamic tracking and injection spray dust reduction device of the coal mining machine in the present invention;

[0030] Figure 2 It is a structural schematic diagram of the dynamic tracking and injection spray dust reduction device for coal mining machine in the present invention;

[0031] Figure 3 This is a front view of the universal ejector in the present invention;

[0032] Figure 4 It is a cross-sectional view of the universal ejector in the present invention;

[0033] Figure 5 It is a schematic diagram of the rotation angle of the universal ejector;

[0034] Figure 6 for Figure 1 Middle AA section view;

[0035] Figure 7 for Figure 1 Middle BB section view;

[0036] Figure 8 This is a schematic diagram of the horizontal device of the coal machine;

[0037] Fig. 9 This is a schematic diagram of the coal machine top cutting state;

[0038] Fig.10 This is a schematic diagram of the coal machine bottom sweeping status.

[0039] Figure markings: 1-combined water inlet pipe; 2-universal ejector; 3-universal ejector support frame; 4-pulley; 5-support arm; 6-pull rope; 7-support seat; 8-coal mining machine body; 9-connecting bolt; 10-pulley mounting seat; 11-baffle; 12-nut; 13-mounting plate; 14-connecting pin; 15-connecting seat; 16-drum motor; 21-spray head; 22-ejector cylinder; 23-support frame; 24-pin shaft; 25-locking nut. DETAILED DESCRIPTION

[0040] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways 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 only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0041] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0042] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0043] See also Figures 1 to 10, which is a dynamic tracking induced spray dust suppression device for a coal mining machine, comprising an induced sprayer, a pulley mounting seat 10, a pulley 4, a support arm 5, and a support seat 7; the induced sprayer is fixedly mounted at one end of the support arm 5 and is located on the outside of the coal mining machine drum; the other end of the support arm 5 is rotatably connected to the support seat 7 through a connecting pin 14; the support seat 7 is fixedly mounted on the coal mining machine body 8 through a connecting seat 15; the pulley 4 is rotatably mounted on the pulley mounting seat 10 through a pin shaft 24, and a baffle 11 is provided on one side of the pulley 4, and the outer side of the baffle 11 is locked by a nut 12. The pulley mounting seat 10 is fixed on the mounting plate 13 by connecting bolts 9 and is located above the support arm 5. The mounting plate 13 is fixedly mounted on the housing of the coal machine drum motor 16. A pull rope 6 made of steel wire rope is provided on the pulley 4. One end of the pull rope 6 is fixedly connected to the support seat 7, and the other end passes through the pulley 4 and is fixedly connected to the support arm 5. The support arm 5 is hoisted on the pulley 4 by the pull rope 6. The rotation center of the support arm 5 is higher than the swing center of the coal machine drum. When the coal machine drum swings up and down, the pulley 4 cooperates with the pull rope 6 to drive the support arm 5 to swing, so that the position of the ejector sprayer changes dynamically with the coal machine drum.

[0044] The ejector sprayer comprises a combined water inlet pipe 1, a universal ejector 2, and a universal ejector support frame 3; the universal ejector support frame 3 is fixedly mounted on one end of a support arm 5; the universal ejector 2 is connected to the combined water inlet pipe 1 and is arranged on the universal ejector support frame 3. There are multiple universal ejectors 2, which are mounted side by side on the universal ejector support frame 3.

[0045] The universal ejector 2 includes a spray head 21, an ejector cylinder 22, and a support frame 23; the ejector cylinder 22 is rotatably mounted on the support frame 23 via a pin shaft 24, and a locking nut 25 is provided at one end of the pin shaft 24. After the ejector cylinder 22 has adjusted its angle, the position of the ejector cylinder 22 is locked by the locking nut 25; the spray head 21 is connected to the combined water inlet pipe 1, and the spray head 21 is fixedly mounted at one end of the ejector cylinder 22. The spray head 21 sprays high-pressure water mist to the other end of the ejector cylinder 22 to reduce dust. Under the ejection effect of the high-pressure water mist, the air on the installation side of the spray head 21 is sucked into the ejector cylinder 22 by negative pressure, and combined with the high-pressure water mist to form secondary dust reduction. There are 8 ejector cylinders, and the total ejection air volume reaches 48m when the water pressure is 4MPa. 3 / min.

[0046] The installation position of the ejector sprayer is less than 1.8 meters away from the drum, and it always closely follows the drum to spray and prevent the coal dust from escaping. The spray direction of the universal ejector 2 is that part of the universal ejector sprays dust directly at the drum, and the other part of the universal ejector sprays in the direction of the wind flow, directing the dust-laden wind flow to the coal wall for natural sedimentation. The ejector sprayer uses the coal machine's own cooling water, and its water pressure is 4-8MPa, which can fully meet the spray requirements without the need for an external high-pressure water pump.

[0047] When the coal machine drum rises, the pulley 4 rises with it. At this time, the lateral distance between the pulley 4 and the fixed support seat 7 on the machine body becomes shorter. When the total length of the pull rope 6 remains unchanged, the vertical distance between the pulley 4 and the support arm 5 becomes longer, and the center of the support arm 5 will drop below the center of the drum, thereby driving the induced sprayer to drop below the center of the drum. The higher the rise, the greater the center drop, which can effectively avoid interference between the induced sprayer and the hydraulic support retracting the shield plate, thereby ensuring the normal operation of the spray system.

[0048] When the end of the coal machine is performing a bottom sweeping operation, the coal machine drum rotates downward. At this time, the lateral distance between the pulley 4 and the fixed support seat 7 will become longer. When the total length of the pull rope 6 remains unchanged, the vertical distance between the pulley 4 and the support arm 5 will become shorter. The pull rope 6 pulls the support arm 5 relatively upward and above the center of the drum, effectively avoiding interference from the bridge turntable baffle 11 and allowing the spray dust reduction device to operate normally.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A dynamic tracking spray dust suppression device for coal mining machines. Features: It includes an ejector sprayer, a pulley mounting seat, a pulley, a support arm, and a support seat; the ejector sprayer is fixedly arranged at one end of the support arm and is located outside the drum of the coal mining machine; the other end of the support arm is rotatably connected to the support seat; the support seat is fixedly arranged on the coal mining machine body; The pulley is rotatably mounted on the pulley mounting seat, and the pulley mounting seat is fixedly mounted on the housing of the coal machine drum motor and is located above the support arm; A pull rope is provided on the pulley, one end of the pull rope is fixedly connected to the support seat, and the other end passes through the pulley and is fixedly connected to the support arm; the support arm is hoisted on the pulley through the pull rope; when the coal machine drum swings up and down, the total length of the pull rope remains unchanged, and the pulley cooperates with the pull rope to drive the support arm to swing, so that the position of the ejector sprayer changes dynamically with the coal machine drum.

2. The dynamic tracking spray dust suppression device for coal mining machines according to claim 1, Features: The rotation center of the support arm is higher than the swing center of the coal machine drum.

3. The dynamic tracking spray dust suppression device for coal mining machines according to claim 1, Features: The ejector sprayer comprises a combined water inlet pipe, a universal ejector, and a universal ejector support frame; the universal ejector support frame is fixedly connected to a support arm; the universal ejector is communicated with the combined water inlet pipe and is arranged on the universal ejector support frame.

4. The dynamic tracking spray dust suppression device for coal mining machines according to claim 3, Features: The universal ejector comprises a spray head, an ejector cylinder, and a support frame; the ejector cylinder is rotatably mounted on the support frame via a pin shaft, and a locking nut is provided at one end of the pin shaft to lock the position of the ejector cylinder via the locking nut; The spray head is connected to the combined water inlet pipe and is fixed at one end of the ejection cylinder. The spray head sprays high-pressure water mist toward the other end of the ejection cylinder to reduce dust. Under the ejection effect of the high-pressure water mist, the air on the installation side of the spray head is sucked into the ejection cylinder by negative pressure and combined with the high-pressure water mist to form secondary dust reduction.

5. The coal mining machine dynamic tracking spray dust suppression device according to claim 4, Features: There are a plurality of universal ejectors, which are arranged side by side on the universal ejector support frame.

6. The coal mining machine dynamic tracking spray dust suppression device according to claim 5, Features: The spray direction of the universal ejector is that a part of the universal ejector sprays dust at the drum, and the other part of the universal ejector sprays in the direction of the wind flow to guide the dust-laden wind flow to the coal wall for natural sedimentation.

7. The coal mining machine dynamic tracking spray dust suppression device according to claim 1, Features: The distance between the ejector sprayer and the coal machine drum is less than 1.8 meters.

8. The coal mining machine dynamic tracking spray dust suppression device according to claim 1, Features: The ejector sprayer uses the cooling water of the coal machine itself as the spray water source.

9. The coal mining machine dynamic tracking spray dust suppression device according to claim 1, Features: The diameter of the coal machine drum is greater than 2.5m.

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