A hydraulic linkage system for tunnel drilling rig

Abstract

The utility model discloses a hydraulic linkage system for a tunnel drilling rig, including a power head motor, a power head feed oil cylinder, a clamp hydraulic cylinder, a hydraulic chuck, and a first hydraulic control oil circuit and a second hydraulic control oil circuit for linkage operation, wherein the oil inlet of the first hydraulic control oil circuit is connected to the oil tank through a variable pump, the oil inlet of the second hydraulic control oil circuit is connected to the oil tank through a quantitative pump, the oil outlet of the first hydraulic control oil circuit is connected to the power head motor, and the oil outlet of the first hydraulic control oil circuit and the oil outlet of the second hydraulic control oil circuit are also connected to the power head feed oil cylinder, the clamp hydraulic cylinder, and the hydraulic chuck through a cartridge valve. The utility model realizes the switching of the drilling rig hydraulic system between independent and linkage operation through the switching selection of the first hydraulic control oil circuit and the second hydraulic control oil circuit; under the condition of simultaneous oil supply, the oil in the upper and lower chambers of the feed oil cylinder is increased, the time of drilling up and drilling down in the drilling operation is shortened, and the drilling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a full hydraulic tunnel drilling rig, in particular to a hydraulic linkage system for the tunnel drilling rig. Background Art

[0002] The existing hydraulic systems of fully hydraulic exploration drilling rigs are mostly single-action hydraulic systems, that is, a single operating handle controls a single actuator. Operators need to follow a certain process flow and operate multiple handles one by one in sequence to perform normal drilling, drilling, and unscrewing drill rod operations. The degree of automation is not high, it is easy to make mistakes and the movements are cumbersome. Operators must be familiar with the operation and drilling process, and the technical requirements are relatively high. Therefore, the hydraulic system is also an important part of the drilling rig design, which directly affects the project safety, progress quality, and thus affects the economic cost of the tunnel drilling rig project. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a hydraulic linkage system for a tunnel drilling machine with reasonable design, simple structure and good logic in view of the deficiencies of the prior art.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A hydraulic linkage system for a tunnel drilling rig, characterized in that the system comprises a power head motor, a power head feed oil cylinder, a clamp hydraulic cylinder, a hydraulic chuck, and a first hydraulic control oil circuit and a second hydraulic control oil circuit for linkage operation, the oil inlet of the first hydraulic control oil circuit is connected to the oil tank through a variable pump, the variable pump and the first hydraulic control oil circuit constitute a load-sensitive oil inlet of the clamp hydraulic cylinder, the clamp hydraulic cylinder, and the hydraulic chuck, the oil inlet of the second hydraulic control oil circuit is connected to the oil tank through a quantitative pump, the oil outlet of the first hydraulic control oil circuit is connected to the power head motor, and the oil outlet of the first hydraulic control oil circuit and the oil outlet of the second hydraulic control oil circuit are also connected to the power head feed oil cylinder, the clamp hydraulic cylinder, and the hydraulic chuck through a cartridge valve;

[0006] The cartridge valve includes a hollow housing and an oil inlet valve block and an oil outlet valve block inserted in the housing. The oil inlet valve block and the oil outlet valve block are both provided with a connected balancing valve and a sequence valve. The oil inlets of the balancing valves on the oil inlet valve block and the oil outlet valve block are both connected to the oil outlets of the first hydraulic control oil circuit and the oil outlets of the second hydraulic control oil circuit. The oil outlet of the sequence valve of the oil inlet valve block is connected to the upper cavity of the oil feed cylinder of the power head, and the oil outlet of the sequence valve of the oil outlet valve block is connected to the lower cavity of the oil feed cylinder of the power head. The oil outlet of the sequence valve of the oil outlet valve block is also connected to the clamper hydraulic cylinder and the hydraulic chuck through a single-link reversing valve.

[0007] The technical problem to be solved by the present invention can also be achieved through the following technical scheme, wherein the first hydraulic control oil circuit includes a first oil inlet and outlet pipeline and a triple valve installed on the first oil inlet and outlet pipeline, the oil inlet of the triple valve is connected to the variable pump, and an operating handle for remotely controlling the oil inlet and outlet direction of the triple valve is installed at the control oil outlet of the triple valve.

[0008] The technical problem to be solved by the utility model can also be achieved by the following technical solution: a first operating handle is installed at the oil outlet where the triple valve is connected to the power head motor, and a second operating handle is installed at the oil outlet where the triple valve is connected to the cartridge valve.

[0009] Since the triple valve is relatively large, remote control is achieved through the first operating handle and the second operating handle, which makes the control cabinet more beautiful in design, reduces its size, and makes transportation and maintenance more convenient.

[0010] The technical problem to be solved by the utility model can also be achieved through the following technical solution: a pressure reducing valve and a speed regulating valve are installed on the oil circuit connecting the first operating handle and the power head motor.

[0011] The technical problem to be solved by the utility model can also be achieved through the following technical solution: a shuttle valve is installed between the upper chamber and the lower chamber of the feed cylinder of the power head, and a drilling pressure gauge for displaying the feed cylinder pressure is connected to the middle position of the shuttle valve.

[0012] The technical problem to be solved by the utility model can also be achieved by the following technical solution: the second hydraulic control oil circuit includes a second inlet and outlet oil pipeline and a linkage valve group installed on the second inlet and outlet oil pipeline. A spare oil port is provided on the triple valve and the linkage valve group, which is convenient for users to temporarily add other auxiliary equipment and protect the stable use of the hydraulic system, and has strong versatility.

[0013] The technical problem to be solved by the utility model can also be achieved through the following technical solution: an accumulator is connected to the clamp hydraulic cylinder to ensure that the clamp is in a normally open state during the drilling process.

[0014] The technical problem to be solved by the present invention can also be achieved through the following technical solution: pressure gauges for displaying the oil pressure in the pipeline are installed on both the first hydraulic control oil circuit and the second hydraulic control oil circuit.

[0015] Compared with the prior art, the utility model has the following technical effects:

[0016] First, by setting up the first hydraulic control oil circuit and the second hydraulic control oil circuit, the switching of the first hydraulic control oil circuit and the second hydraulic control oil circuit is realized to realize the switching of independent and linked operation of the hydraulic system of the drilling rig, so as to solve the problem of misoperation that may occur when the operator frequently operates multiple handles to perform operations; moreover, the first hydraulic control oil circuit and the second hydraulic control oil circuit can both supply oil to the oil cylinder of the power head, and under the condition of simultaneous oil supply, the oil in the upper and lower chambers of the oil cylinder is increased, the time of drilling up and drilling down in the drilling operation is shortened, and multiple drill rods can be reciprocated, thereby improving the drilling efficiency;

[0017] Second, by setting a variable displacement pump and a first hydraulic control oil circuit to form a load-sensitive oil inlet circuit, the hydraulic stepless speed regulation of the power head is realized, and the speed regulation of the original mechanical shift mechanism of the power head is cancelled, so as to solve the problem that the speed regulation operation of the mechanical shift mechanism of the power head is complicated and the manufacturing and use cost is high;

[0018] Third, by setting up a triple valve and a linkage valve group, oil is supplied through a variable pump and a metering pump respectively, so that the pressure valve can stably supply oil to the actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of the hydraulic linkage system for the tunnel drilling rig of the utility model;

[0020] Figure 2 This is a simplified structural diagram of the cartridge valve.

[0021] In the figure: 1. power head motor, 2. power head feed cylinder, 3. cartridge valve, 4. single reversing valve, 5. accumulator, 6. clamp hydraulic cylinder, 7. hydraulic chuck, 8. drilling pressure gauge, 9. shuttle valve, 10. linkage valve group, 11. pressure gauge, 12. fixed displacement pump, 13. variable displacement pump, 14. first operating handle, 15. second operating handle, 16. triple valve, 17. pressure reducing valve, 18. speed regulating valve, 19. balancing valve, 20. sequence valve. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0024] Reference Figure 1 and Figure 2 A hydraulic linkage system for a tunnel drilling rig, the system includes a power head motor 1, a power head feed cylinder 2, a clamp hydraulic cylinder 6, a hydraulic chuck 7, and a first hydraulic control oil circuit and a second hydraulic control oil circuit for linkage operation. By switching the first hydraulic control oil circuit and the second hydraulic control oil circuit, the switching of the drilling rig hydraulic system for independent and linkage operation is realized. The operator selects different control modes according to the requirements of different working conditions of the drilling rig, with high automation, high safety and convenient operation.

[0025] The oil inlet of the first hydraulic control oil circuit is connected to the oil tank through the variable pump 13, and the variable pump 13 and the first hydraulic control oil circuit constitute the load-sensitive oil inlet of the clamper hydraulic cylinder 2, the clamper hydraulic cylinder 6, and the hydraulic chuck 7. The oil inlet of the second hydraulic control oil circuit is connected to the oil tank through the quantitative pump 12, and the oil outlet of the first hydraulic control oil circuit is connected to the power head motor 1. The oil outlet of the first hydraulic control oil circuit and the oil outlet of the second hydraulic control oil circuit are also connected to the power head feed cylinder 2, the clamper hydraulic cylinder 6, and the hydraulic chuck 7 through the cartridge valve 3;

[0026] The cartridge valve 3 includes a hollow shell and an oil inlet valve block and an oil outlet valve block inserted in the shell. The oil inlet valve block and the oil outlet valve block are both provided with a connected balance valve 20 and a sequence valve 19. The oil inlets of the balance valve 20 on the oil inlet valve block and the oil outlet valve block are connected to the oil outlet of the first hydraulic control oil circuit and the oil outlet of the second hydraulic control oil circuit. The oil outlet of the sequence valve 19 of the oil inlet valve block is connected to the upper cavity of the power head feed cylinder 2, and the oil outlet of the sequence valve of the oil outlet valve block is connected to the lower cavity of the power head feed cylinder 2. The oil outlet of the sequence valve of the oil outlet valve block is also connected to the clamper hydraulic cylinder 6 and the hydraulic chuck 7 through the single-link reversing valve 4.

[0027] The first hydraulic control oil circuit includes a first inlet and outlet oil pipeline and a triple valve 16 installed on the first inlet and outlet oil pipeline. The oil inlet of the triple valve 16 is connected to the variable pump 13, and an operating handle for remotely controlling the inlet and outlet directions of the triple valve is installed at the oil outlet of the triple valve 16.

[0028] A first operating handle 14 is installed at the oil outlet where the triple valve 16 is connected to the power head motor 1 , and a second operating handle 15 is installed at the oil outlet where the triple valve 16 is connected to the cartridge valve 3 .

[0029] A pressure reducing valve 17 and a speed regulating valve 18 are installed on the oil circuit connecting the first operating handle 14 and the power head motor 1 .

[0030] A shuttle valve 9 is installed between the upper chamber and the lower chamber of the feed oil cylinder 2 of the power head, and a drilling pressure gauge 8 for displaying the feed oil cylinder pressure is connected to the middle position of the shuttle valve 9.

[0031] The second hydraulic control oil circuit includes a second inlet and outlet oil pipeline and a linkage valve group 10 installed on the second inlet and outlet oil pipeline. The linkage valve group can be any linkage valve group disclosed in the prior art that can be used for a hydraulic system.

[0032] The clamp hydraulic cylinder 6 is connected with an accumulator 5 to ensure that the clamp is in a normally open state during drilling.

[0033] Pressure gauges 11 for displaying the oil pressure in the pipeline are installed on both the first hydraulic control oil circuit and the second hydraulic control oil circuit.

[0034] The hydraulic linkage system described in the utility model has the following advantages:

[0035] First, through the switching selection of single-link reversing valve and linkage valve group, the switching of independent and linkage operation of the drilling rig hydraulic system can be realized. The operator can choose different control methods according to the needs of different working conditions of the drilling rig, which has a strong degree of automation, high safety and convenient operation.

[0036] Secondly, the variable pump and triple valve form a load-sensitive oil inlet circuit to achieve hydraulic stepless speed regulation of the power head and cancel the original speed regulation of the mechanical shift mechanism of the power head, thereby solving the problem of complex speed regulation operation of the mechanical shift mechanism of the power head and high manufacturing and use costs.

[0037] Thirdly, the triple valve and linkage valve group are supplied with oil through a variable pump and a quantitative pump respectively, so that the pressure valve can stably supply oil to the actuator.

[0038] Fourthly, the feed oil cylinder is directly connected to the power head, and the oil entering the upper and lower chambers of the feed oil cylinder is increased through the triple valve and linkage valve combination oil, which greatly shortens the drilling and drilling time of the drilling operation and improves the drilling efficiency.

[0039] Fifth, the clamper and hydraulic chuck are mechanically clamped and hydraulically opened, which solves the problem of reduced clamping force due to valve core leakage in the hydraulic system oil circuit. The structure is stable and reliable.

[0040] Sixth, the cartridge valve is internally provided with a balancing valve and a sequence valve integrated therein. Before oil is supplied to the feed cylinder through the triple valve for rapid up and down drilling, the clamp and the hydraulic chuck are automatically opened or closed according to the drilling process, thereby realizing automatic linkage operation of the feed cylinder, the clamp and the hydraulic chuck, with stable and reliable quality.

[0041] Seventh, the accumulator is directly connected to the hydraulic cylinder of the clamp to ensure that during the drilling process, the clamp is in a normally open state and closes due to self-leakage, thereby avoiding accidents. It has high reliability and safety and is simple and easy to use.

[0042] Eighth, the middle position of the shuttle valve is connected to the drilling pressure gauge, and the two ends are respectively connected to the upper chamber and the lower chamber of the feed cylinder. According to the requirements of the rock formation and the drilling process, the drilling pressure is increased or decreased through the display of the drilling pressure gauge dial to select the best fit between the drill bit and the bottom rock formation, reduce blind drilling, increase the service life of the drill bit, reduce the number of up and down drilling, improve drilling efficiency, and save project costs.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hydraulic linkage system for a tunnel drilling rig, characterized in that: The system includes a power head motor, a power head feed cylinder, a clamp hydraulic cylinder, a hydraulic chuck, and a first hydraulic control oil circuit and a second hydraulic control oil circuit for linkage operation. The oil inlet of the first hydraulic control oil circuit is connected to the oil tank through a variable pump. The variable pump and the first hydraulic control oil circuit constitute a load-sensitive oil inlet of the clamp hydraulic cylinder, the clamp hydraulic cylinder, and the hydraulic chuck. The oil inlet of the second hydraulic control oil circuit is connected to the oil tank through a quantitative pump. The oil outlet of the first hydraulic control oil circuit is connected to the power head motor. The oil outlets of the first hydraulic control oil circuit and the second hydraulic control oil circuit are also connected to the power head feed cylinder, The clamper hydraulic cylinder and the hydraulic chuck are connected; the cartridge valve includes a hollow shell and an oil inlet valve block and an oil outlet valve block inserted in the shell, the oil inlet valve block and the oil outlet valve block are both provided with a connected balance valve and a sequence valve, the balance valve oil inlets on the oil inlet valve block and the oil outlet valve block are connected to the oil outlet of the first hydraulic control oil circuit and the oil outlet of the second hydraulic control oil circuit, the sequence valve oil outlet of the oil inlet valve block is connected to the upper cavity of the power head feeding cylinder, the sequence valve oil outlet of the oil outlet valve block is connected to the lower cavity of the power head feeding cylinder, and the sequence valve oil outlet of the oil outlet valve block is also connected to the clamper hydraulic cylinder and the hydraulic chuck through a single-link reversing valve.

2. A hydraulic linkage system for a tunnel drilling rig according to claim 1, characterized in that: The first hydraulic control oil circuit includes a first inlet and outlet oil pipeline and a triple valve installed on the first inlet and outlet oil pipeline. The oil inlet of the triple valve is connected to the variable pump, and an operating handle for remotely controlling the inlet and outlet direction of the triple valve is installed at the control oil outlet of the triple valve.

3. A hydraulic linkage system for a tunnel drilling rig according to claim 2, characterized in that: A first operating handle is installed at the oil outlet where the triple valve is connected to the power head motor, and a second operating handle is installed at the oil outlet where the triple valve is connected to the cartridge valve.

4. A hydraulic linkage system for a tunnel drilling rig according to claim 3, characterized in that: A pressure reducing valve and a speed regulating valve are installed on the oil circuit connecting the first operating handle and the power head motor.

5. The hydraulic linkage system for a tunnel drilling rig according to claim 1, characterized in that: A shuttle valve is installed between the upper chamber and the lower chamber of the oil feed cylinder of the power head, and a drilling pressure gauge for displaying the pressure of the oil feed cylinder is connected to the middle position of the shuttle valve.

6. A hydraulic linkage system for a tunnel drilling rig according to claim 2, characterized in that: The second hydraulic control oil circuit includes a second inlet and outlet oil pipeline and a linkage valve group installed on the second inlet and outlet oil pipeline.

7. A hydraulic linkage system for a tunnel drilling machine according to claim 6, characterized in that: The triple valve and the linkage valve group are both provided with spare oil ports for adding auxiliary equipment.

8. The hydraulic linkage system for a tunnel drilling rig according to claim 1, characterized in that: The clamp hydraulic cylinder is connected with an accumulator to ensure that the clamp is in a normally open state during drilling.

9. The hydraulic linkage system for a tunnel drilling rig according to claim 1, characterized in that: Pressure gauges for displaying the oil pressure in the pipeline are installed on both the first hydraulic control oil circuit and the second hydraulic control oil circuit.

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