A rotary system for a cutting mechanism of a rock drill

Abstract

This invention discloses a rotary system for the cutting mechanism of a roadheader, comprising: two hydraulic cylinders, an electromagnetic directional valve, a logic controller, and an electronic control button. This device, by incorporating hydraulic cylinders with displacement sensors, an electromagnetic directional valve, a logic controller, and an electronic control button, forms a one-button return-to-center control system for the roadheader's cutting mechanism. Using this system in the roadheader's hydraulic system, the cutting mechanism can be returned to center with a single press of the electronic control button when needed, ensuring accurate centering without relying on the operator's visual judgment. When using left or right-side anchor drilling rigs, it ensures the cutting mechanism of the roadheader remains accurately centered, preventing uncontrollable left or right deviations that could affect the roadheader's performance. This system is simple and compact, easy to manufacture and process, and simpler and more efficient to operate, reducing the difficulty of operation for workers and improving work efficiency and safety during construction.

Description

Technical Field

[0001] This invention relates to the field of roadheader technology, and more specifically to a roadheader cutting mechanism rotary system. Background Technology

[0002] In existing roadheader equipment, the drilling and anchoring system is located on both sides of the machine, above the traveling section. The onboard temporary support structure is located above the cutting mechanism. After the cutting operation performed by the roadheader's cutting mechanism is completed, the cutting mechanism is centered and placed on the ground. Then, the onboard temporary support structure is raised, and the anchor drilling rigs on both sides of the roadheader are used to drive anchor bolts and lay anchor mesh.

[0003] Due to the need for compactness, the distance between the anchor drilling rigs on both sides and the cutting mechanism is limited. If the cutting mechanism is not precisely centered but deflected, the anchor drilling rigs on both sides can easily collide with the cutting mechanism, damaging the equipment.

[0004] Therefore, when the anchor drilling rigs on both sides are operating, the cutting mechanism needs to be in a relatively precise centered position. However, in existing coal mines, whether the cutting mechanism of the anchor drilling rig is centered relies entirely on the worker's visual perception, experience, and judgment. Furthermore, the poor lighting in underground coal mines, along with the equipment itself obstructing the view, further increases the difficulty of operation for workers. This makes it almost impossible for the equipment to be in an ideal centered position, leading to an increase in the number of collision-related damages and raising the cost of equipment use and maintenance. Summary of the Invention

[0005] The technical problem solved by this invention is that the positioning of the cutting mechanism of existing underground coal mine roadheaders relies entirely on the worker's visual perception and experience, which increases the difficulty of operation. This makes it almost impossible for the equipment to be in an ideally centered position, leading to an increase in the number of collision-related damages and thus increasing the cost of equipment use and maintenance.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A rotary system for the cutting mechanism of a tunneling and anchoring machine, comprising:

[0008] Two hydraulic cylinders, one of which is equipped with a displacement sensor as a sensing cylinder;

[0009] An electromagnetic directional valve is connected to the two hydraulic cylinders via an oil circuit and is used to control the flow of hydraulic oil.

[0010] A logic controller, which is communicatively connected to a displacement sensor and an electromagnetic directional valve, respectively.

[0011] An electronically controlled button, which is electrically connected to the logic controller;

[0012] When the electronic control button is pressed, the displacement sensor acquires the stroke x of the sensing cylinder and sends it to the logic controller, which controls the operation of the electromagnetic directional valve.

[0013] When the stroke x equals the preset value a, the cutting mechanism is in the neutral position and the electromagnetic reversing valve does not operate.

[0014] When the stroke x is greater than the preset value a, the logic controller sends a signal to the solenoid directional valve, and the solenoid directional valve actuates to retract the piston of the sensing cylinder until the stroke of the sensing cylinder is reduced to equal the preset value a.

[0015] When the stroke x is less than the preset value a, the logic controller sends a signal to the solenoid directional valve, and the solenoid directional valve actuates to extend the piston of the sensing cylinder until the stroke of the sensing cylinder increases to equal the preset value a.

[0016] As a further aspect of the present invention: a first safety valve is provided in the oil circuit located between the electromagnetic directional valve and the hydraulic cylinder.

[0017] As a further aspect of the present invention, a damping mechanism is provided in the pilot pressure opening oil circuit of the first safety valve.

[0018] As a further aspect of the present invention: the oil circuit includes a first oil circuit and a second oil circuit. One end of the first oil circuit is connected to the electromagnetic directional valve, and the other end is connected to the rodless chamber of one hydraulic cylinder and the rod chamber of another hydraulic cylinder. One end of the second oil circuit is connected to the electromagnetic directional valve, and the other end is connected to the rod chamber of one hydraulic cylinder and the rodless chamber of another hydraulic cylinder.

[0019] As a further aspect of the present invention: a second safety valve is also provided in the oil circuit. One end of the second safety valve is connected to the position between the first safety valve and the hydraulic cylinder in one oil circuit, and the other end is connected to another oil circuit. The connection point is located between the first safety valve and the solenoid directional valve in the other oil circuit.

[0020] As a further aspect of the present invention: the overflow pressure of the first safety valve is 250 bar, and the overflow pressure of the second safety valve is 280 bar.

[0021] As a further aspect of the present invention: a rotary control handle is provided, which is used to control the operation of the electromagnetic reversing valve.

[0022] According to the present invention, a rotary system for a cutting mechanism of a tunneling and anchoring machine has at least one of the following technical effects:

[0023] This device comprises a hydraulic cylinder with a displacement sensor, an electromagnetic directional valve, a logic controller, and an electronic control button, forming a one-button return-to-center control system for the roadheader's cutting mechanism. Using this system within the roadheader's hydraulic system, the cutting mechanism can be returned to center with a single press of the electronic control button when needed, ensuring accurate centering without relying on operator visual judgment. When using left or right-side anchor drilling rigs, it ensures the cutting mechanism remains accurately centered, preventing uncontrollable deviations that could affect the roadheader's performance. This system is simple and compact, easy to manufacture and process, and simplifies and enhances operation, reducing worker workload and improving work efficiency and safety during construction.

[0024] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the workflow of the logic controller of the present invention;

[0028] Figure 3 This is a schematic diagram of the electronically controlled button controlling the sensing cylinder of the present invention;

[0029] Figure 4 This is a schematic diagram of the rotary handle controlling the sensing cylinder of the present invention;

[0030] Figure 5 This is a schematic diagram of the cutting mechanism of the present invention, slightly to the right.

[0031] Figure 6 This is a schematic diagram of the centrally located cutting mechanism of the present invention;

[0032] Figure 7 This is a schematic diagram of the cutting mechanism of the present invention, which is positioned slightly to the left.

[0033] In the diagram: 1. Sensing cylinder; 2. Second safety valve; 3. First safety valve; 4. Solenoid directional valve; 5. Logic controller; 6. Electric control button; 7. Rotary control handle; 8. Damping. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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, they should not be construed as limiting this invention.

[0036] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0037] Please see Figure 1-7 As shown, this invention is a rotary system for a cutting mechanism of a tunneling and anchoring machine, comprising: two hydraulic cylinders, an electromagnetic directional valve 4, a logic controller 5, and an electric control button 6. One of the two hydraulic cylinders is equipped with a displacement sensor as a sensing cylinder 1; the electromagnetic directional valve 4 is connected to both hydraulic cylinders via an oil circuit and is used to control the flow of hydraulic oil in the oil circuit and hydraulic cylinders; the logic controller 5 is communicatively connected to the displacement sensor and the electromagnetic directional valve 4 respectively; the electric control button 6 is electrically connected to the logic controller 5; when the electric control button 6 is pressed, the displacement sensor acquires the stroke x of the sensing cylinder 1 and transmits it to the logic controller 5, which then controls the operation of the electromagnetic directional valve 4.

[0038] Please see Figure 1-3 In one embodiment of the present invention, two hydraulic cylinders are respectively disposed on both sides of the cutting mechanism, and the movable end of the hydraulic cylinder is connected to the cutting mechanism to drive the movement of the cutting mechanism. One of the hydraulic cylinders is equipped with a displacement sensor as a sensing cylinder 1; the displacement sensor detects the stroke information (extension and retraction) of the sensing cylinder 1 in real time and feeds the stroke data back to the logic controller 5; when the cutting mechanism is in the center position, the stroke corresponding to the sensing cylinder 1 at this time is set to a preset value a; when the stroke data of the sensing cylinder 1 obtained by the displacement sensor is different from the preset value, it indicates that the cutting mechanism is deflected.

[0039] Please see Figure 1-3 In one embodiment of the present invention, the electromagnetic directional valve 4 is connected to the two hydraulic cylinders via an oil circuit and is used to control the flow of hydraulic oil. The opening and closing of the directional valve can be controlled by a point signal, and the sensing cylinder 1 automatically extends and retracts. The oil circuit may include a first oil circuit (corresponding to oil circuit A in the attached drawing) and a second oil circuit (corresponding to oil circuit B in the attached drawing). One end of the first oil circuit is connected to the electromagnetic directional valve 4, and the other end is connected to the rodless chamber of one hydraulic cylinder and the rod chamber of the other hydraulic cylinder. One end of the second oil circuit is connected to the electromagnetic directional valve 4, and the other end is connected to the rod chamber of one hydraulic cylinder and the rodless chamber of the other hydraulic cylinder. When the first oil circuit serves as the oil inlet channel, the stroke of the left hydraulic cylinder increases, and the stroke of the right hydraulic cylinder retracts. At this time, the second oil circuit can serve as the oil return channel; conversely, the return path also changes. The direction of hydraulic oil flow in the oil circuit is controlled by the electromagnetic directional valve 4. By setting two oil circuits, the two cylinders can work synchronously.

[0040] Please see Figure 1-3 In one embodiment of the present invention, the logic controller 5 is communicatively connected to the displacement sensor and the solenoid directional valve 4, respectively. The logic controller 5 can determine which of the three states—leftward, rightward, and straightened—the cutting mechanism of the tunneling and anchoring machine is in by analyzing the real-time extension and retraction of the sensing cylinder 1, and then control the solenoid directional valve 4 to move the sensing cylinder 1 to achieve the straightening of the cutting mechanism. An electrically controlled button 6 is also provided, electrically connected to the logic controller 5. When the electrically controlled button 6 is in the pressed state, it sends a continuous signal to the logic controller 5, which then controls the solenoid directional valve 4 to operate. When the electrically controlled button 6 is in the reset state, the logic controller 5 does not operate. Specifically, when the electronic control button 6 is pressed, the displacement sensor acquires the stroke x of the sensing cylinder 1 and sends it to the logic controller 5. The logic controller 5 controls the operation of the electromagnetic directional valve 4: when the stroke x is greater than a preset value a, the logic controller 5 sends a signal to the electromagnetic directional valve 4, and the electromagnetic directional valve 4 operates to retract the piston of the sensing cylinder 1 until the stroke of the sensing cylinder 1 is reduced to equal to the preset value a; when the stroke x is less than the preset value a, the logic controller 5 sends a signal to the electromagnetic directional valve 4, and the electromagnetic directional valve 4 operates to extend the piston of the sensing cylinder 1 until the stroke of the sensing cylinder 1 is increased to equal to the preset value a; when the stroke x is equal to the preset value a, the cutting mechanism is in a neutral position, and the electromagnetic directional valve 4 does not operate.

[0041] Please see Figure 1-3In one embodiment of the present invention, a first safety valve 3 is provided in the oil circuit located between the electromagnetic directional valve 4 and the hydraulic cylinder. One first safety valve 3 is provided in each of the first and second oil circuits. A damper 8 is provided in the pilot pressure opening oil circuit of the first safety valve 3. One end of the damper 8 is connected to the first safety valve 3 in one oil circuit, and the other end is connected to another oil circuit, with the connection point located between the first safety valve 3 and the electromagnetic directional valve 4 in the other oil circuit. A second safety valve 2 is also provided in the oil circuit. One end of the second safety valve 2 is connected between the first safety valve 3 and the hydraulic cylinder in one oil circuit, and the other end is connected to another oil circuit, with the connection point located between the first safety valve 3 and the electromagnetic directional valve 4 in the other oil circuit. The overflow pressure of the first safety valve 3 is 250 bar, and the overflow pressure of the second safety valve 2 is 280 bar. By providing safety valves, the slewing cylinder of the roadheader operates more smoothly and can also act as a hydraulic lock. A first safety valve 3 and a second safety valve 2 are combined to act as a hydraulic lock. This prevents the sensing cylinder 1 from moving due to the weight of the cutting mechanism when it is tilted to the left or right. The safety valve's pilot opening pressure circuit incorporates damping 8, which smoothly controls the opening of the valve cores, ensuring smooth oil inlet and outlet, and more stable cylinder movement, resulting in smoother rotation of the cutting mechanism. The second safety valve 2 also protects the cylinder from hydraulic shock. When the pressure inside the cylinder exceeds the set pressure, the cylinder can release pressure through the safety valve. The set pressure of the second safety valve 2 is higher than that of the first safety valve 3. Together, they provide better protection for the cylinder, preventing damage from excessive instantaneous pressure.

[0042] Please see Figure 4 In one embodiment of the present invention, a rotary control handle 7 is also provided, which is used to control the operation of the electromagnetic reversing valve 4. By providing a rotary control handle 7, the operation of the electromagnetic reversing valve 4 can be controlled independently, allowing the tunneling and anchoring machine to be manually operated to rotate the cutting mechanism. The control process of the rotary control handle 7 operates independently and will not interfere with the one-button tunneling and anchoring machine automatic return system. The one-button tunneling and anchoring machine automatic return system only starts working when the electric control button 6 is pressed. When the electric control button 6 is reset, the sensing cylinder 1 will not work automatically.

[0043] Working principle of the invention:

[0044] Please see Figure 1-7In use, the electronic control button 6 inputs a signal to the logic controller 5. The logic controller 5 controls the solenoid directional valve 4 to work. The solenoid directional valve 4 controls the sensing cylinder 1. The displacement sensor built into the sensing cylinder 1 feeds back the extension and retraction data of the sensing cylinder 1 to the logic controller 5. The logic controller 5 compares the real-time extension and retraction of the displacement sensor cylinder with the extension and retraction of the rotary cylinder when the cutting mechanism of the tunneling and anchoring machine is in the middle and makes a judgment to determine which action state the cutting mechanism of the tunneling and anchoring machine is in, thereby controlling the displacement sensor cylinder to move to make the cutting mechanism return to the center.

[0045] Specifically, taking the right-side hydraulic cylinder as an example, sensor cylinder 1 is used. When the cutting mechanism of the roadheader needs to return to center, press the return control button 6 on the roadheader's control panel. The control button 6 sends a signal to the logic controller 5, which in turn sends an action signal to the solenoid directional valve 4. The solenoid directional valve 4 actuates, and sensor cylinder 1 follows suit. Because sensor cylinder 1 is mounted on the right side of the roadheader, when the stroke of the displacement sensor is greater than the set value 'a' of the displacement sensor when the cutting mechanism is centered, the roadheader's cutting mechanism deviates to the left, and the solenoid directional valve 4 controls sensor cylinder 1 to retract. When the stroke of the displacement sensor is equal to the set value 'a' of the displacement sensor when the cutting mechanism is centered, the solenoid directional valve 4 stops working. When the stroke of the displacement sensor is less than the extension / retraction amount 'a' of the displacement sensor cylinder when the cutting mechanism is centered, the roadheader's cutting mechanism deviates to the right, and the solenoid directional valve 4 controls sensor cylinder 1 to extend. All these actions only occur when the control button 6 sends a continuous signal to the logic controller 5.

[0046] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the scope of the claims.

Claims

1. A rotary system for the cutting mechanism of a tunneling and anchoring machine, characterized in that, include: Two hydraulic cylinders, one of which is equipped with a displacement sensor as a sensing cylinder (1). The electromagnetic directional valve (4) is connected to the two hydraulic cylinders through an oil circuit and is used to control the flow of hydraulic oil. The oil circuit is located between the electromagnetic reversing valve (4) and the hydraulic cylinder, and a first safety valve (3) is provided. A damper (8) is provided in the oil circuit where the pilot pressure of the first safety valve (3) opens. The oil circuit includes a first oil circuit and a second oil circuit. One end of the first oil circuit is connected to the electromagnetic reversing valve (4), and the other end is connected to the rodless chamber of one hydraulic cylinder and the rod chamber of another hydraulic cylinder. One end of the second oil circuit is connected to the electromagnetic reversing valve (4), and the other end is connected to the rod chamber of one hydraulic cylinder and the rodless chamber of another hydraulic cylinder. The logic controller (5) is communicatively connected to the displacement sensor and the electromagnetic reversing valve (4); An electronic control button (6) is electrically connected to the logic controller (5); When the electronic control button (6) is pressed, the displacement sensor acquires the stroke x of the sensing cylinder (1) and sends it to the logic controller (5). The logic controller (5) is used to control the action of the electromagnetic reversing valve (4). When the stroke x equals the preset value a, the cutting mechanism is in the middle position and the electromagnetic reversing valve (4) does not operate. When the stroke x is greater than the preset value a, the logic controller (5) sends a signal to the solenoid directional valve (4), and the solenoid directional valve (4) moves to make the piston of the sensing cylinder (1) retract until the stroke of the sensing cylinder (1) is reduced to equal to the preset value a. When the stroke x is less than the preset value a, the logic controller (5) sends a signal to the solenoid directional valve (4), and the solenoid directional valve (4) actuates to extend the piston of the sensing cylinder (1) until the stroke of the sensing cylinder (1) increases to equal the preset value a.

2. The rotary system for the cutting mechanism of a tunneling and anchoring machine according to claim 1, characterized in that, A second safety valve (2) is also provided in the oil circuit. One end of the second safety valve (2) is connected between the first safety valve (3) and the hydraulic cylinder in one oil circuit, and the other end is connected to another oil circuit. The connection point is located between the first safety valve (3) and the solenoid directional valve (4) in the other oil circuit.

3. The rotary system for the cutting mechanism of a tunneling and anchoring machine according to claim 2, characterized in that, The overflow pressure of the first safety valve (3) is 250 bar, and the overflow pressure of the second safety valve (2) is 280 bar.

4. A rotary system for a cutting mechanism of a tunneling and anchoring machine according to any one of claims 1 to 3, characterized in that, A rotary control handle (7) is provided, which is used to control the operation of the electromagnetic reversing valve (4).

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