A kind of oil cylinder and steel wire rope linkage type adjustable dust cover device for rotary drilling rig

Abstract

The utility model discloses a toothed wheel drilling machine oil cylinder and steel wire rope linkage formula adjustable dust cover device, including respectively being located in the dust cover and drive assembly of toothed wheel drilling machine propulsion beam, its top is fixedly connected with the clamping plate between the propulsion beam, and the surface of dust cover is equipped with counterweight subassembly, and drive assembly is connected with dust cover through counterweight subassembly. The telescopic piece is driven to connect the dust cover telescopic with the guide piece, can adapt to the ground height change in real time, ensures that dust cover and ground are closely combined, reduces dust outflow, and the telescopic piece and connecting piece linkage structure are simple in structure, low in dust jam risk and low in maintenance cost, and the telescopic piece drives to realize automatic regulation, does not need manual operation, saves time and eliminates the hidden danger, and the dust cover can be flexibly stretched or folded, and the position can be adjusted according to the demand during operation, and the drilling condition is convenient to observe, and the device has the advantages of real -time adaptability, reliable structure, convenient adjustment and convenient observation.

Description

Technical Field

[0001] This utility model belongs to the technical field of mining machinery and equipment, specifically relating to an adjustable dust cover device for a rotary drilling rig. Background Technology

[0002] As a drilling equipment, roller cone drills are mostly used in large open-pit mines. Open-pit drilling equipment has evolved from "nodding drills" to flame drills and percussion (down-the-hole) drills. Ultimately, roller cone drills have become the widely used drilling equipment in large and medium-sized open-pit mines due to their advantages such as large hole diameter and high drilling efficiency.

[0003] Traditional dust hoods for rotary drilling rigs mostly use fixed or manually adjustable structures, which have the following significant drawbacks:

[0004] Insufficient adaptability: It cannot adapt to changes in ground height in real time, resulting in serious dust leakage during drilling operations, polluting the working environment and endangering the health of operators.

[0005] Poor reliability: The mechanical linkage mechanism is complex and is prone to jamming and failure in dusty environments over a long period of time, requiring frequent maintenance.

[0006] Inefficient and dangerous operation: manual adjustment takes a lot of time, and there are safety hazards such as falls from heights and mechanical injuries in the drilling rig operation area.

[0007] Inconvenient observation: The fixed structure makes it impossible to observe the drilling situation of the drilling rig in real time and conveniently, which affects the efficiency and accuracy of operation. Utility Model Content

[0008] The purpose of this utility model is to provide an adjustable dust cover device for roller cone drilling rigs that is linked by a hydraulic cylinder and a wire rope, so as to solve the technical defects of existing dust covers for roller cone drilling rigs, such as insufficient adaptability, poor reliability, low efficiency and danger, and inconvenient observation.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] An adjustable dust cover device for a rotary drilling rig, which is linked by a hydraulic cylinder and a wire rope, includes a dust cover and a drive assembly respectively installed on the push beam of the rotary drilling rig. A clamp is fixedly connected between the top of the dust cover and the push beam. A counterweight assembly is provided on the surface of the dust cover. The drive assembly is connected to the dust cover through the counterweight assembly and can work with the counterweight assembly to extend or fold the dust cover as a whole or on one side.

[0011] The drive assembly includes telescopic components, guide components, and connecting components. Two telescopic components and two guide components are each provided on the propulsion beam. The telescopic components extend and retract in opposite directions. The guide components are connected to the counterweight assembly via the connecting components to achieve the overall or unilateral extension and folding of the dust hood.

[0012] As a further embodiment of this utility model, a clamp is fixedly connected to each of the four sides of the top of the dust cover, and two adjacent clamps are connected end to end to form a rectangular frame.

[0013] As a further embodiment of this utility model, the counterweight assembly includes four counterweight blocks that are fixedly connected to the right angle of the outer surface of the dust cover and are arranged parallel to the clamping plate. The four counterweight blocks form a group, and there are two groups of counterweight blocks arranged vertically. A chain is fixedly connected between two adjacent counterweight blocks on the same horizontal line.

[0014] As a further embodiment of this utility model, a counterweight bar is fixedly connected around the outer surface of the dust cover, and the counterweight bar is located between the upper and lower chains.

[0015] As a preferred embodiment of this utility model, the telescopic component includes a horizontally arranged hydraulic cylinder, a fixed seat is installed between the tail end of the hydraulic cylinder and the top of the push beam, the piston rod of the hydraulic cylinder cooperates with the guide and connecting parts to connect with the counterweight, a fixed frame is sleeved on the surface of the hydraulic cylinder, and the bottom of the fixed frame is fixedly connected to the top of the push beam.

[0016] As a further embodiment of this utility model, the guide component includes pulley blocks A, B, C, and D. Pulley block A is fixedly connected to the piston rod of the hydraulic cylinder, and the bottom of pulley block A is slidably connected to the top of the push beam. Pulley block B is arranged opposite to pulley block A and is fixedly connected to the top of the push beam. Pulley blocks C and D are both fixedly connected to the side of the push beam. Pulley block C is arranged close to pulley block B, and pulley block D is arranged opposite to pulley block C.

[0017] As a further embodiment of this utility model, pulley blocks A, B, C and D have the same structure. Each of pulley blocks A, B, C and D includes a pulley seat and a pulley. The piston rod of the hydraulic cylinder and the push beam are fixedly connected to the corresponding pulley seat. Each pulley is rotatably connected to the inner cavity of each pulley seat through bearings.

[0018] As a further embodiment of this utility model, the pulley blocks C have two pulley seats arranged vertically, and the two pulley seats on the pulley blocks C are horizontally offset.

[0019] As a further embodiment of this utility model, the connecting component includes steel wire rope A and steel wire rope B. One end of steel wire rope A and steel wire rope B are fixedly connected to the pulley seat of pulley block B. The other end of steel wire rope A passes through the pulleys of pulley block A, pulley block B, and the lower pulley of pulley block C in sequence, and is then fixed to the bottom of the dust hood. The other end of steel wire rope B passes through the pulleys of pulley block A, pulley block B, the upper pulley of pulley block C, and the pulley of pulley block D in sequence, and is then fixed to the bottom of the dust hood.

[0020] As a further embodiment of this utility model, the surface of the counterweight is threaded with lifting rings, and the ends of steel wire ropes A and B away from pulley block B pass through the corresponding two lifting rings in the same vertical direction from top to bottom, and are fixed to the bottom of the dust cover by rope clamps.

[0021] Compared with existing technologies, the adjustable dust cover device for roller cone drills, which is linked by a hydraulic cylinder and a wire rope, provided by this utility model has the following advantages:

[0022] In this invention, the telescopic component and guide component work together to drive the connecting component, causing the dust hood to extend and retract. This allows for real-time adaptation to changes in ground height, ensuring a tight fit between the dust hood and the ground and reducing dust leakage. The telescopic component and connecting component linkage structure is simpler than traditional mechanical linkage mechanisms, reducing the risk of dust jamming and maintenance costs. The telescopic component drive enables automated adjustment, eliminating the need for manual operation, saving time and eliminating safety hazards. The dust hood can be flexibly extended or folded, and its position can be adjusted as needed during operation, facilitating observation of the drilling situation. Thus, this device has the advantages of real-time adaptability, reliable structure, convenient adjustment, and easy observation. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only examples of embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A structural schematic diagram provided for an embodiment of this utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the driving component in an embodiment of the present utility model;

[0026] Figure 3 This is a schematic diagram of the counterweight and lifting ring in an embodiment of this utility model.

[0027] Figure label:

[0028] 100. Dust cover;

[0029] 200. Plywood;

[0030] 300. Counterweight assembly; 310. Counterweight block; 311. Lifting ring; 320. Chain; 330. Counterweight bar;

[0031] 400. Drive assembly; 410. Telescopic component; 411. Hydraulic cylinder; 412. Fixed base; 413. Fixed frame; 420. Guide component; 421. Pulley block A; 422. Pulley block B; 423. Pulley block C; 424. Pulley block D; 430. Connecting component; 431. Wire rope A; 432. Wire rope B. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0033] In the description of the embodiments of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., 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 embodiments of 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. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0034] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0035] See appendix Figures 1-3 As shown in the figure, an adjustable dust cover device for a rotary drill rig with cylinder and wire rope linkage is provided. It includes a dust cover 100 and a drive assembly 400 respectively disposed on the push beam of the rotary drill rig. A clamping plate 200 is fixedly connected between the top of the dust cover 100 and the push beam. A counterweight assembly 300 is provided on the surface of the dust cover 100. The drive assembly 400 is connected to the dust cover 100 through the counterweight assembly 300 and can cooperate with the counterweight assembly 300 to extend and fold the dust cover 100 as a whole or on one side.

[0036] The drive assembly 400 includes a telescopic member 410, a guide member 420, and a connector 430. Two telescopic members 410 and two guide members 420 are respectively provided on the push beam. The telescopic directions of the two telescopic members 410 are opposite. The guide member 420 is connected to the counterweight assembly 300 through the connector 430 to realize the overall or single-sided extension and folding of the dust cover 100.

[0037] One clamping plate 200 is fixedly connected to each of the four sides of the top of the dust hood 100. Two adjacent clamping plates 200 are connected end to end to form a rectangular frame. The clamping plates 200 form a rectangular frame, which is fixedly connected to the push beam to enhance the stability of the dust hood 100 installation and prevent dust leakage caused by shaking during operation. The rectangular frame structure provides uniform support for the dust hood 100, ensuring that it maintains a regular shape during the extension and retraction process, and works with the drive component 400 to achieve smooth adjustment.

[0038] The counterweight assembly 300 includes four counterweight blocks 310 that are fixedly connected to the right angle of the outer surface of the dust cover 100 and are arranged parallel to the clamping plate 200. The counterweight blocks 310 have an L-shaped structure. The four counterweight blocks 310 form a group. There are two groups of counterweight blocks 310 arranged vertically. A chain 320 is fixedly connected between two adjacent counterweight blocks 310 on the same horizontal line.

[0039] A counterweight bar 330 is fixedly connected around the outer surface of the dust cover 100, and the counterweight bar 330 is located between the upper and lower chains 320. The counterweight block 310 at the right angle of the outer surface of the dust cover 100 is connected by the chain 320. Together with the counterweight bar 330, the weight of the dust cover 100 is evenly distributed, and the jamming caused by the center of gravity shift during extension and retraction is avoided. The counterweight block 320 is connected to the wire rope (through the lifting ring 311), which can enhance the stability of the wire rope transmission, ensure that the traction force of the drive component 400 on the dust cover 100 is even, and improve the adjustment accuracy. The counterweight bar 330 is located between the upper and lower chains 320, which increases the weight of the edge of the dust cover 100, so that it fits more tightly with the ground and further reduces the possibility of dust leakage from the edge. The counterweight bar 330 is distributed around the dust cover 100, which can improve the overall rigidity of the dust cover 100 and prevent deformation caused by long-term use or external force.

[0040] The telescopic component 410 includes a horizontally arranged hydraulic cylinder 411. A fixed seat 412 is installed between the tail end of the hydraulic cylinder 411 and the top of the push beam. The piston rod of the hydraulic cylinder 411, the guide component 420, and the connecting component 430 cooperate with and connect to the counterweight 310. A fixed frame 413 is sleeved on the surface of the hydraulic cylinder 411. The bottom of the fixed frame 413 is fixedly connected to the top of the push beam. The horizontally arranged hydraulic cylinder 411 is installed on the push beam through the fixed seat 412 and the fixed frame 413 to ensure accurate output power direction and avoid the hydraulic cylinder 411 shaking and affecting transmission accuracy. The combined design of the fixed seat 412 and the fixed frame 413 facilitates the disassembly, assembly, and maintenance of the hydraulic cylinder 411 and reduces the difficulty of on-site operation.

[0041] The guide component 420 includes pulley blocks A421, B422, C423, and D424. Pulley block A421 is fixedly connected to the piston rod of the hydraulic cylinder 411, and the bottom of pulley block A421 is slidably connected to the top of the push beam. Pulley block B422 is arranged opposite to pulley block A421 and is fixedly connected to the top of the push beam. Pulley blocks C423 and D424 are both fixedly connected to the sides of the push beam. Pulley block C423 is positioned close to pulley block B422, and pulley block D424 is positioned opposite to pulley block C423. Pulley blocks A421, B422, C423, and D424 guide the direction of the wire rope, preventing it from rubbing against the propulsion beam or other components and reducing wear. The relative arrangement of the pulley blocks (e.g., pulley blocks C and D are opposite each other) ensures that the wire rope is subjected to balanced forces on both sides, enabling synchronous and stable adjustment of the dust hood 100 as a whole or on one side.

[0042] Pulley blocks A421, B422, C423, and D424 have the same structure. Each of these blocks includes a pulley seat and a pulley. The piston rod and push beam of the hydraulic cylinder 411 are fixedly connected to the corresponding pulley seat. One pulley is rotatably connected to the inner cavity of each pulley seat via bearings. Each pulley is connected to the pulley seat via bearings, allowing it to rotate freely, reducing the resistance of the wire rope transmission and improving the driving efficiency of the hydraulic cylinder 411. The identical structure of each pulley block facilitates standardized production and replacement, reducing maintenance costs.

[0043] The pulley blocks C423 have two pulley seats arranged vertically, and the two pulley seats on the pulley blocks C423 are horizontally offset. The horizontal offset of the two pulley seats of the pulley blocks C423 changes the winding angle of the wire rope, avoids the wire ropes A431 and B432 from getting tangled during transmission, and ensures smooth adjustment. The offset design can optimize the layout of wire ropes A431 and B432 in a limited space, and adapt to the installation requirements on the side of the propulsion beam.

[0044] The connector 430 includes wire rope A431 and wire rope B432. One end of wire rope A431 and wire rope B432 are fixedly connected to the pulley seat of pulley block B422. The other end of wire rope A431 passes through the pulleys of pulley block A421, pulley block B422, and the lower pulley of pulley block C423 in sequence, and is then fixed to the bottom of dust cover 100. The other end of wire rope B432 passes through the pulleys of pulley block A421, pulley block B422, and the upper pulley of pulley block C423 in sequence. The pulley and pulley block D424 are fixed to the bottom of the dust hood 100. The wire rope A431 is shorter than the wire rope B432. Both are high-strength oil-coated wire ropes. The wire ropes A431 and B432 are fixed to the bottom of the dust hood 100 respectively through the guidance of different pulley blocks, so as to realize the traction of the dust hood 100 at different positions and precisely control the extension angle of the dust hood 100. The high-strength oil-coated wire rope is resistant to dust corrosion and has high tensile strength, making it suitable for long-term use in harsh mining environments.

[0045] The counterweight 310 has threaded connections to lifting rings 311. The ends of wire ropes A431 and B432 away from pulley block B422 pass through the corresponding two lifting rings 311 in the same vertical direction from top to bottom, and are fixed to the bottom of the dust cover 100 by rope clamps. The wire ropes pass through the lifting rings 311 and counterweight 310, and are fixed to the bottom of the dust cover 100 by rope clamps to ensure that the connection does not loosen during transmission and to prevent the dust cover 100 from falling off due to force. The threaded connection of the lifting rings 311 can adjust the tension of the wire ropes, which is convenient for fine-tuning the balance of the dust cover 100 on site according to actual needs.

[0046] Four sets of SICK LMS111 laser rangefinders are symmetrically installed around the bottom of the dust cover 100. The sensor emitters point vertically downwards to detect the real-time distance between the dust cover 100 and the ground. Each set of sensors collects data in real time, and the average value of the four sets of data is taken as the current ground height reference value. If any set of data deviates from the average value by more than 5mm (a customizable threshold can be set), it is determined that there is a change in ground height. A Siemens S7-1200 PLC controller is used to electrically connect the sensors and hydraulic cylinders 411. When a change in ground height is detected, the electrically connected sensors transmit data signals to the controller. The controller receives the data signals and controls the hydraulic cylinders 411 to start the adjustment process. If the deviation of the four sets of sensor data is uniform (deviation ≤ 15mm), it is determined that the ground is uneven overall. The controller controls the two hydraulic cylinders 411 to extend and retract synchronously to adjust the overall height of the dust cover 100. If the deviation of a sensor on one side is > 15mm (e.g., 20mm on the left and 5mm on the right), it is determined that the ground is uneven on one side. The controller controls the hydraulic cylinder 411 on the corresponding side to move separately to achieve unilateral adjustment.

[0047] A Rexroth 4WE6E62 / EG24N9K4 proportional solenoid valve is added to the hydraulic circuit of hydraulic cylinder 411, and its opening is controlled by the controller. Magnetostrictive displacement sensors of the MTS RHM series are installed at both ends of the cylinder barrel of hydraulic cylinder 411 to provide real-time feedback on the displacement of the cylinder piston rod, forming a closed-loop control. The displacement sensor feeds back the actual extension and retraction of the cylinder to the controller and compares it with the target adjustment amount. If the deviation is >2mm, a secondary adjustment is initiated to ensure the positioning accuracy of the dust cover 100.

[0048] When the above technical solution is used, the hydraulic cylinder 411 is activated. When the piston rod of the hydraulic cylinder 411 extends or retracts, the piston rod of the hydraulic cylinder 411 drives the pulley block A421 to slide on the push beam. The pulley block A421 pulls the ends of the wire rope A431 and the wire rope B432 to move up and down synchronously, so that the dust cover 100 moves synchronously with the wire rope A431 and the wire rope B432, realizing extension or folding.

[0049] If both hydraulic cylinders 411 are in operation, the dust cover 100 can be extended or folded as a whole; if only one hydraulic cylinder 411 is in operation, the dust cover 100 can be extended or retracted on one side, which is convenient for observation or adjustment on one side; and the sealing state of the dust cover 100 can be automatically adjusted according to the ground height, while meeting the needs of dust blocking and drilling observation, significantly improving the environmental protection and safety of the rotary drilling rig operation.

[0050] In this embodiment of the invention, the telescopic component 410 and the guide component 420 work together to drive the connecting component 430 to extend and retract the dust cover 100, which can adapt to changes in ground height in real time, ensuring that the dust cover 100 fits tightly to the ground and reduces dust leakage. The linkage structure between the telescopic component 410 and the connecting component 430 is simpler than traditional mechanical linkage mechanisms, with a low risk of dust jamming and low maintenance costs. The telescopic component 410 drive enables automatic adjustment without manual operation, saving time and eliminating safety hazards. The dust cover 100 can be flexibly extended or folded, and its position can be adjusted according to needs during operation, making it easy to observe the drilling situation. Thus, the device has the advantages of real-time adaptability, reliable structure, convenient adjustment, and convenient observation.

[0051] The above description illustrates the basic principles of the present invention. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The above embodiments and descriptions in the specification are only for illustrating the principles of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and scope of the present invention without departing from the scope of the present invention should be included within the protection scope of the present invention.

Claims

1. An adjustable dust cover device for a rotary drilling rig, characterized by: [Further details about the device and its features are needed for accurate translation] It includes a dust cover (100) and a drive assembly (400) respectively mounted on the push beam of the rotary drill. A clamp (200) is fixedly connected between the top of the dust cover (100) and the push beam. A counterweight assembly (300) is provided on the surface of the dust cover (100). The drive assembly (400) is connected to the dust cover (100) through the counterweight assembly (300). The counterweight assembly (300) is used to extend or fold the dust cover (100) as a whole or on one side. The drive assembly (400) includes a telescopic member (410), a guide member (420), and a connector (430). Two telescopic members (410) and two guide members (420) are respectively provided on the propulsion beam. The telescopic members (410) extend in opposite directions. The guide member (420) is connected to the counterweight assembly (300) through the connector (430) to extend and fold the dust cover (100) as a whole or on one side.

2. The adjustable dust cover device for a rotary drilling rig with cylinder and wire rope linkage as described in claim 1, characterized in that: The dust cover (100) is fixedly connected to four sides of the top, and two adjacent clamps (200) are connected end to end to form a rectangular frame.

3. The adjustable dust cover device for a rotary drilling rig with cylinder and wire rope linkage as described in claim 2, characterized in that: The counterweight assembly (300) includes four counterweight blocks (310) that are fixedly connected to the right angle of the outer surface of the dust cover (100) and are arranged parallel to the clamp (200). The four counterweight blocks (310) form a group, and the counterweight blocks (310) are arranged in two groups vertically. A chain (320) is fixedly connected between two adjacent counterweight blocks (310) on the same horizontal line.

4. The adjustable dust cover device for a rotary drilling rig with cylinder and wire rope linkage as described in claim 3, characterized in that: The dust cover (100) is fixedly connected to a counterweight (330) around its outer surface, and the counterweight (330) is located between the upper and lower chains (320).

5. The adjustable dust cover device for a rotary drilling rig with cylinder and wire rope linkage as described in claim 3, characterized in that: The telescopic component (410) includes a horizontally arranged hydraulic cylinder (411). A fixed seat (412) is installed between the tail end of the hydraulic cylinder (411) and the top of the push beam. The piston rod of the hydraulic cylinder (411) cooperates with the guide (420) and the connecting part (430) to connect with the counterweight (310). A fixed frame (413) is sleeved on the surface of the hydraulic cylinder (411). The bottom of the fixed frame (413) is fixedly connected to the top of the push beam.

6. The adjustable dust cover device for a rotary drilling rig with cylinder and wire rope linkage as described in claim 5, characterized in that: The guide component (420) includes pulley block A (421), pulley block B (422), pulley block C (423) and pulley block D (424). Pulley block A (421) is fixedly connected to the piston rod of the hydraulic cylinder (411). The bottom of pulley block A (421) is slidably connected to the top of the push beam. Pulley block B (422) is arranged opposite to pulley block A (421) and is fixedly connected to the top of the push beam. Pulley block C (423) and pulley block D (424) are both fixedly connected to the side of the push beam. Pulley block C (423) is arranged close to pulley block B (422). Pulley block D (424) is arranged opposite to pulley block C (423).

7. The adjustable dust cover device for a rotary drilling rig with cylinder and wire rope linkage as described in claim 6, characterized in that: The pulley blocks A (421), B (422), C (423) and D (424) have the same structure. Each of the pulley blocks A (421), B (422), C (423) and D (424) includes a pulley seat and a pulley. The piston rod and the push beam of the hydraulic cylinder (411) are fixedly connected to the corresponding pulley seats. Each pulley is rotatably connected to the inner cavity of each pulley seat through a bearing.

8. The adjustable dust cover device for a rotary drilling rig with cylinder and wire rope linkage as described in claim 7, characterized in that: The pulley blocks C (423) have two pulley seats arranged vertically, and the two pulley seats on the pulley blocks C (423) are horizontally offset.

9. The adjustable dust cover device for a rotary drilling rig with cylinder and wire rope linkage as described in claim 8, characterized in that: The connector (430) includes wire rope A (431) and wire rope B (432). One end of wire rope A (431) and wire rope B (432) are fixedly connected to the pulley seat of pulley block B (422). The other end of wire rope A (431) passes through the pulleys of pulley block A (421), pulley block B (422), and the pulley of pulley block C (423) located below, and is fixed to the bottom of dust cover (100). The other end of wire rope B (432) passes through the pulleys of pulley block A (421), pulley block B (422), pulley of pulley block C (423) located above, and pulley of pulley block D (424) in sequence, and is fixed to the bottom of dust cover (100).

10. The adjustable dust cover device for a rotary drilling rig with cylinder and wire rope linkage as described in claim 9, characterized in that: The counterweight (310) has a threaded connection to a lifting ring (311). The ends of the wire ropes A (431) and B (432) away from the pulley block B (422) pass through the corresponding two lifting rings (311) in the same vertical direction from top to bottom, and are fixed to the bottom of the dust cover (100) by rope clamps.

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