Roof bolter and hydraulic system of roof bolter

Abstract

The utility model relates to the technical field of roof bolters, in particular to a hydraulic system of a roof bolter, which comprises a hydraulic pump, a multi-way valve and a switching valve group. The hydraulic pump is connected with the motor; the multi-way valve is connected with the execution element through a working pipeline; a port P of the switching valve set is connected with an outlet of the hydraulic pump through a high-pressure pipeline and connected with a port P of the multi-way valve, and the switching valve set comprises a speed regulating valve and an electromagnetic reversing valve. The speed regulating valve and the electromagnetic directional valve are connected in parallel, so that two oil ports of the electromagnetic directional valve and the speed regulating valve can converge, one oil port can be disconnected, the other oil port can be communicated, the speed of the oil cylinder is controlled, the roof bolter can quickly move to a preset position without adjusting the flow of a multi-way valve, the function of accurately finding a hole in a micro-motion mode can be achieved, the structure is simple, and operation is convenient. The maintenance is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of bolt machines, and particularly relates to a bolt machine and a hydraulic system of the bolt machine. Background Art

[0002] When the bolt machine performs bolt operations, it is achieved by controlling each actuator (such as cylinders, motors, etc.) of the bolt machine through a multi-way directional control valve. According to the needs of bolt operations, when finding a hole, it is required that the bolt arm moves quickly to a predetermined position and can achieve accurate hole finding. In actual operations, due to the mechanical clearance of the bolt arm and the flow control characteristics of the multi-way valve, during the micro-motion hole-finding process of the bolt arm, there will be situations such as sudden speed changes, unstable movements, and shaking of the bolt arm, making it difficult to achieve the function of accurate hole finding. For this reason, an oil pump can be used to output pressure oil to the multi-way valve, and the multi-way valve directly controls each actuator of the bolt machine; alternatively, a speed control valve group and a hydraulic control directional valve group can be serially added to the intermediate pipeline between the oil pump and the multi-way valve. The hydraulic control directional valve is made to change direction through an electromagnetic directional valve, so that the bolt arm has a micro-motion performance. However, this method has a complex system, high cost, and difficulty in troubleshooting, and requires underground maintenance personnel to have a high technical level. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the shortcomings existing in the prior art and propose to design a bolt machine and a hydraulic system of the bolt machine, which can realize the function that the bolt machine quickly moves to a predetermined position and can perform micro-motion accurate hole finding without adjusting the flow rate of the multi-way valve during the hole-finding process of the bolt machine.

[0004] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0005] A hydraulic system of a bolt machine includes:

[0006] A hydraulic pump, connected to an electric motor;

[0007] A multi-way valve, connected to the actuator through a working pipeline;

[0008] A switching valve group, the P port of the switching valve group is connected to the outlet of the hydraulic pump through a high-pressure pipeline, the P port of the switching valve group is connected to the P port of the multi-way valve, the switching valve group includes a speed control valve and an electromagnetic directional valve, and the speed control valve and the electromagnetic directional valve are in a parallel form, so that the two oil ports of the electromagnetic directional valve and the speed control valve can merge, or one path can be disconnected and the other path can be connected, thereby controlling the speed of the cylinder. Without adjusting the flow rate of the multi-way valve, the function that the bolt machine quickly moves to a predetermined position and can perform micro-motion accurate hole finding can be realized.

[0009] Further, the actuators include a left lifting cylinder, a right lifting cylinder, a bolt arm telescopic cylinder, a front swing cylinder of the bolt machine, a rear swing cylinder of the bolt arm, etc.

[0010] Further, the motor is connected to the hydraulic pump through a coupling.

[0011] Further, the electromagnetic directional valve can be an electromagnetic ball valve or an electromagnetic directional valve with other neutral position functions.

[0012] Further, the joint block is connected to the motor of the rock bolter and the multi-way valve through pipelines.

[0013] Further, the joint block includes ports A3, A4, A5, B3, B4, and B5; the motor of the rock bolter includes ports A and B; the multi-way valve further includes a first valve plate and a second valve plate. The first valve plate includes ports A1 and B1; the second valve plate includes ports A2 and B2. Port A5 of the joint block is connected to port A of the motor of the rock bolter, port B5 of the joint block is connected to port B of the motor of the rock bolter, port A4 of the joint block is connected to port A2 of the first valve plate, port B4 of the joint block is connected to port B2 of the first valve plate, port A3 of the joint block is connected to port A1 of the first valve plate, and port B3 of the joint block is connected to port B1 of the first valve plate.

[0014] Further, the first valve plate is provided with a relief valve a for limiting the maximum pressure of the forward rotation oil port A of the motor of the rock bolter at high pressure. The second valve plate is provided with a relief valve b for limiting the pressure of the forward rotation port A of the motor of the rock bolter at low pressure.

[0015] The present utility model also provides a rock bolter, including the hydraulic system of the rock bolter.

[0016] Technical effects of the present utility model:

[0017] Compared with the prior art, the speed control valve and the electromagnetic directional valve of the present utility model are in a parallel form and are installed on the intermediate pipeline between the hydraulic pump and the multi-way valve directional valve. By controlling the commutation of the electromagnetic directional valve, it can achieve the function of quickly moving the rock bolter to a predetermined position and precisely finding the hole by micro-movement without adjusting the flow rate of the multi-way valve. The overall structure design of the present utility model is simple, easy to maintain, and has a low cost. Description of the drawings

[0018] Figure 1 It is a schematic structural principle diagram of the hydraulic system of the rock bolter of the present utility model.

[0019] In the figure, 1, motor; 3, coupling; 3, hydraulic pump; 4, switching valve group; 5, multi-way valve; 6, rear swing cylinder of the rock bolter arm; 7, front swing cylinder of the rock bolter; 8, telescopic cylinder of the rock bolter arm; 9, right lifting cylinder; 10, left lifting cylinder; 11, motor of the rock bolter; 12, joint block; 41, speed control valve; 42, electromagnetic directional valve; 51, first valve plate; 52, second valve plate; 512, relief valve a; 522, relief valve b. Detailed implementation manners

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following clearly and completely describes the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings of the specification.

[0021] Embodiment 1:

[0022] As Figure 1 shown, a hydraulic system of an anchor rod machine involved in this embodiment includes a motor 1, a coupling 3, a hydraulic pump 3, a switching valve group 4, a multi-way valve 5, a rear swing cylinder 6 of the anchor rod arm, a front swing cylinder 7 of the anchor rod machine, a telescopic cylinder 8 of the anchor rod arm, a right lifting cylinder 9, a left lifting cylinder 10, an anchor rod machine motor 11, and a joint block 12.

[0023] The motor 1 is connected to the hydraulic pump 3 through a coupling 2. The outlet of the hydraulic pump 3 is connected to the P1 port of the switching valve group 4 through a high-pressure pipeline. The P2 port of the switching valve group 4 is connected to the P port of the multi-way valve 5. The multi-way valve 5 is respectively connected to the left lifting cylinder 10, the right lifting cylinder 9, the telescopic cylinder 8 of the anchor rod arm, the front swing cylinder 7 of the anchor rod machine, and the rear swing cylinder 6 of the anchor rod arm through working pipelines. The switching valve group 4 includes a speed control valve 41 and an electromagnetic directional valve 42. The speed control valve 41 and the electromagnetic directional valve 42 are in a parallel form, and the two oil circuits merge and communicate, and are connected to the oil circuit inlet P port of the multi-way valve 5, so that the two oil ports of the electromagnetic directional valve 42 and the speed control valve 41 can merge, or one path can be disconnected and the other path can be connected, so as to control the speed of the cylinder. Its principle is simple and the number of components is small.

[0024] The joint block 12 is connected to the anchor rod machine motor 11 and the multi-way valve 5 through pipelines. Specifically, the joint block 12 includes A3 port, A4 port, A5 port, B3 port, B4 port, and B5 port; the anchor rod machine motor 11 includes A port and B port; the multi-way valve 5 further includes a first valve plate 51 and a second valve plate 52. The first valve plate 51 includes A1 port and B1 port; the second valve plate 52 includes A2 port and B2 port. The A5 port of the joint block 12 is connected to the A port of the anchor rod machine motor 11, the B5 port of the joint block 12 is connected to the B port of the anchor rod machine motor 11, the A4 port of the joint block 12 is connected to the A2 port of the first valve plate 51, the B4 port of the joint block 12 is connected to the B2 port of the first valve plate 51, the A3 port of the joint block 12 is connected to the A1 port of the first valve plate 51, and the B3 port of the joint block 12 is connected to the B1 port of the first valve plate 51.

[0025] The first valve plate 51 is provided with a relief valve a512 for limiting the maximum pressure of the forward rotation oil port A of the anchor rod machine motor 11 at high pressure. The second valve plate 52 is provided with a relief valve b522 for limiting the pressure of the forward rotation A oil port of the anchor rod machine motor 11 at low pressure.

[0026] Working conditions during the rapid operation of the bolter: The high-flow pressure oil output by the hydraulic pump 3 enters the P1 port of the switching valve group 4 through the high-pressure pipeline, and then is divided into two paths. One path passes through the speed control valve 41 and reaches the P2 port of the switching valve group 4, and the other path passes through the electromagnetic reversing valve 42 and reaches the P2 port of the switching valve group 4. After merging at the P2 port of the switching valve group 4, it enters the P port of the multi-way valve 5 through the high-pressure pipeline. The multi-way valve 5 controls the rapid movement of the left lifting cylinder 10, the right lifting cylinder 9, the bolter arm telescopic cylinder 8, the bolter front swing cylinder 7, and the bolter arm rear swing cylinder 6.

[0027] Working conditions during the precise hole-finding operation with micro motion of the bolter: After the bolter quickly moves to the predetermined position, the electromagnet of the electromagnetic reversing valve 42 is energized, and the spool of the electromagnetic reversing valve 42 changes its direction. The pressure oil output by the hydraulic pump 3 enters the P1 port of the switching valve group 4 through the high-pressure pipeline, reaches the P2 port of the switching valve group 4 after being limited by the flow control valve 41, and then enters the P port of the multi-way valve 5 through the high-pressure pipeline. The multi-way valve 5 controls the slow micro motion of the left lifting cylinder 10, the right lifting cylinder 9, the bolter arm telescopic cylinder 8, the bolter front swing cylinder 7, and the bolter arm rear swing cylinder 6 in a very small flow state to achieve precise hole-finding operation.

[0028] Working conditions of the bolter motor at low speed and high torque: Operate the first valve 51. The pressure oil output from the A1 port of the first valve 51 enters the A3 port of the joint block 12 and flows to the A5 and A4 ports of the joint block 12 respectively. Among them, the pressure oil at the A5 port of the joint block 12 enters the A port of the bolter motor 11, and the bolter motor 11 rotates forward at low speed. The A4 oil port of the joint block 12 is connected to the A2 port of the second valve 52. Since the neutral position function of the second valve 52 is of the O type, the pressure oil entering the A2 oil port of the second valve 52 is blocked. The maximum pressure of the forward rotation oil port A of the bolter motor 11 is limited by the relief valve a512 of the first valve 51 to ensure that the bolter motor 11 outputs high torque. In this working condition, the bolter can be in a state of high torque and low speed for cable anchor holes, pressure relief holes, roof cutting holes, gas exploration holes, water exploration holes, or bolt holes in hard rock geological conditions.

[0029] Working conditions of the bolter motor at high speed and low torque: Operate the second valve 52. The pressure oil output from the A2 port of the second valve 52 enters the A4 port of the joint block 12 and flows to the A5 and A3 ports of the joint block 12 respectively. Among them, the pressure oil at the A5 port of the joint block 12 enters the A port of the bolter motor 11, and the bolter motor 11 rotates forward at high speed. The A3 oil port of the joint block 12 is connected to the A1 port of the first valve 51. Since the neutral position function of the first valve 51 is of the O type, the pressure oil entering the A1 oil port of the first valve 51 is blocked. The forward rotation A oil port pressure of the bolter motor 11 is limited by the relief valve b522 of the second valve 52 to ensure that the bolter motor 11 outputs low torque. In this working condition, the bolter can be in normal bolt operation.

[0030] The utility model realizes the function that during the process of the bolt machine searching for holes, without adjusting the flow rate and pressure of the multi-way valve, the bolt machine can quickly move to a predetermined position and can finely move to accurately search for holes. At the same time, the bolt machine has different working modes of high rotational speed and low torque, and low rotational speed and high torque, and has the advantages of low cost, easy troubleshooting, and easy implementation.

[0031] Embodiment 2:

[0032] This embodiment provides a bolt machine, including the bolt machine hydraulic system described in Embodiment 1.

[0033] The above specific implementation manners are only specific cases of the utility model. The patent protection scope of the utility model includes but is not limited to the above specific implementation manners. Any appropriate changes or modifications made by any person skilled in the art who meets the claims of the utility model shall fall within the patent protection scope of the utility model.

Claims

1. A hydraulic system for an anchor bolter, characterized in that: include: A hydraulic pump connected to the motor; The multi-way valve is connected to the actuator through the working pipeline; A switching valve group, wherein the P port of the switching valve group is connected to the hydraulic pump outlet through a high-pressure pipeline, and the P port of the switching valve group is connected to the P port of the multi-way valve. The switching valve group includes a speed regulating valve and an electromagnetic reversing valve, and the speed regulating valve and the electromagnetic reversing valve are connected in parallel.

2. The hydraulic system of the bolter according to claim 1, characterized in that: The actuators include a left lifting cylinder, a right lifting cylinder, an anchor arm telescopic cylinder, an anchor bolt machine front swing cylinder, and an anchor arm rear swing cylinder.

3. The hydraulic system of the bolter according to claim 1, characterized in that: The motor is connected to the hydraulic pump via a coupling.

4. The hydraulic system of the bolter according to claim 1, characterized in that: The joint block is connected with the bolter motor and the multi-way valve through pipelines.

5. The hydraulic system of the bolter according to claim 4, characterized in that: The connector block includes A3 port, A4 port, A5 port, B3 port, B4 port and B5 port; the bolt machine motor includes A port and B port; the multi-way valve also includes a first valve and a second valve, the first valve includes A1 port and B1 port; the second valve includes A2 port and B2 port; the A5 port of the connector block is connected to the A port of the bolt machine motor, the B5 port of the connector block is connected to the B port of the bolt machine motor, the A4 port of the connector block is connected to the A2 port of the first valve, the B4 port of the connector block is connected to the B2 port of the first valve, the A3 port of the connector block is connected to the A1 port of the first valve, and the B3 port of the connector block is connected to the B1 port of the first valve.

6. The hydraulic system of the bolter according to claim 5, characterized in that: The first valve is provided with an overflow valve a; the second valve is provided with an overflow valve b.

7. An anchor bolter, characterized in that: It comprises the hydraulic system of the anchor bolter as claimed in any one of claims 1 to 6.

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