A hydraulic control system for a caterpillar drill

Abstract

The application relates to a hydraulic control system of a caterpillar drilling machine, which comprises a hydraulic pump group, a main system valve block, a motion valve block and an adjusting valve block; an oil inlet of the hydraulic pump group is communicated with an oil tank, an oil outlet of the hydraulic pump group is communicated with the main system valve block, the main system valve block is respectively communicated with the motion valve block, a mud pump and a stirring mechanism, the motion valve block is respectively communicated with a rotary mechanism, a fishing winch and an oil feeding cylinder, so as to drive the oil feeding cylinder to make a fast rod reversing action; the hydraulic pump group is communicated with the oil feeding cylinder through the adjusting valve block; the adjusting valve block can adjust the drilling pressure and the drilling speed of the oil feeding cylinder. The beneficial effect is that another adjusting oil path is reset while ensuring the basic oil path of the oil feeding cylinder, the two oil paths do not interfere with each other, that is, the oil feeding cylinder can perform the normal action, and the two modes of constant drilling pressure drilling and constant drilling speed drilling can be realized, so that the drilling demand of complex working conditions is met.

Description

Technical Field

[0001] This invention relates to the field of geological drilling technology, and in particular to a hydraulic control system for a crawler drilling rig. Background Technology

[0002] A drilling rig is a mechanical device used in the exploration or development of mineral resources (including solid, liquid, and gaseous minerals) to drive drilling tools underground and obtain physical geological data. A tracked hydraulic drilling rig, also known simply as a tracked drilling rig, consists of a power unit, a hydraulic system, a tracked walking mechanism, a hydraulic rock drill, and a propeller. Its borehole diameter ranges from 35 to 125 mm, and its drilling depth varies from tens to hundreds of meters. It is suitable for geological surveys and explorations in fields such as geological exploration, engineering geology, hydrogeology, and mining geology.

[0003] Currently, patent CN117052755A discloses a hydraulic system for a crawler drilling rig, including a flow-regulating component. This component is a tubular structure installed outside the outlet connector of the hydraulic body. An auxiliary component is located at the top of the component, and a buffer chamber is located inside the auxiliary component. A flow-diverting component, made of rubber, is fixed inside the buffer chamber. During oil backflow, the oil can contact the flow-diverting component. Because the flow-diverting component has a conical structure, it controls the uniform distribution of oil, allowing the oil to flow through the diverting pipe and then converge and contact the bottom rod. This eliminates the impact force of the oil backflow, preventing the hydraulic system from impacting and vibrating the outlet connector during operation, which can easily lead to oil seepage or leakage over long periods. However, this hydraulic system cannot adjust the drilling pressure and speed during crawler drilling, failing to meet the drilling requirements under complex working conditions.

[0004] Therefore, there is an urgent need for a hydraulic control system for crawler drilling rigs that can meet the drilling requirements under complex working conditions. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a hydraulic control system for a crawler drilling rig, which solves the technical problem that the drilling pressure and drilling speed cannot be adjusted during the drilling process, and thus cannot meet the drilling requirements under complex working conditions.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0009] This invention provides a hydraulic control system for a crawler drilling rig. The crawler drilling rig includes a crawler chassis assembly, and outrigger assemblies, a traveling assembly, a mud pump, a mixing mechanism, a slewing mechanism, a salvage winch, and a feed cylinder mounted on the crawler chassis assembly. The hydraulic control system includes a hydraulic pump unit, a main system valve block, an actuation valve block, and a regulating valve block. The inlet of the hydraulic pump unit is connected to an oil tank, and the outlet of the hydraulic pump unit is connected to the main system valve block. The main system valve block is connected to the actuation valve block, the mud pump, and the mixing mechanism. The actuation valve block is connected to the slewing mechanism, the salvage winch, and the feed cylinder to drive the feed cylinder to perform a rapid rod-reversing action. The hydraulic pump unit is connected to the feed cylinder through the regulating valve block. The regulating valve block can adjust the drilling pressure and drilling speed of the feed cylinder.

[0010] Optionally, the regulating valve block includes a relief valve, a reversing valve, and a speed regulating circuit; the reversing valve is connected to the hydraulic pump group and the oil tank respectively, the reversing valve is connected to the small chamber of the feed cylinder through a first oil circuit, the reversing valve is connected to the large chamber of the feed cylinder through a second oil circuit, the speed regulating circuit is located in the second oil circuit, the second oil circuit is also connected to a third oil circuit, the third oil circuit is connected to the oil tank, and the relief valve is located in the third oil circuit; the connection between the third oil circuit and the second oil circuit is closer to the feed cylinder than the speed regulating circuit.

[0011] Optionally, the speed control circuit includes a check valve, a speed control valve, and a bridge rectifier circuit; the bridge rectifier circuit is located in the second oil circuit, the check valve and the speed control valve are located within the bridge rectifier circuit, and the bridge rectifier circuit is sequentially connected to the speed control valve and the check valve.

[0012] Optionally, the third oil line is further provided with an electromagnetic reversing valve, which is located between the overflow valve and the oil tank.

[0013] Optionally, the reversing valve is a three-position four-way solenoid reversing valve, and the relief valve is a proportional relief valve.

[0014] Optionally, the regulating valve block can adjust the drilling pressure range of the feed cylinder from 0 to 21 MPa.

[0015] Optionally, the regulating valve block can adjust the drilling speed of the feed cylinder to a range of 0 to 5.5 m / min.

[0016] Optionally, the hydraulic pump assembly includes an engine and a tandem pump; the engine is driven to the tandem pump, the inlet of the tandem pump serves as the inlet of the hydraulic pump assembly and is connected to the oil tank, the outlet of the tandem pump serves as the outlet of the hydraulic pump assembly and is connected to the main system valve block, and the tandem pump is connected to the regulating valve block.

[0017] (III) Beneficial Effects

[0018] The beneficial effects of this invention are:

[0019] This invention provides a hydraulic control system for a crawler drilling rig. Hydraulic oil is delivered to the main system valve block via a hydraulic pump unit. After being collected and distributed by the main system valve block, oil is supplied to the mud pump, stirring mechanism, and actuation valve block. The actuation valve block then supplies oil to the slewing mechanism, fishing winch, and feed cylinder to drive the slewing mechanism and fishing winch to perform actions, and to drive the feed cylinder to perform routine actions such as rapid rod reversal. Simultaneously, the hydraulic pump unit directly supplies oil to the feed cylinder through an adjusting valve block, which regulates the drilling pressure and speed of the feed cylinder, enabling both constant drilling pressure and constant drilling speed modes to be adjusted and switched according to complex working conditions. Compared to existing technologies, this hydraulic system, while ensuring the basic oil circuit for the feed cylinder's routine operation, also establishes an additional adjusting oil circuit. These two circuits do not interfere with each other, ensuring that the feed cylinder can perform routine operations while allowing for adjustment of drilling pressure and speed according to actual geological conditions, meeting the drilling needs of complex working conditions and improving drilling efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a hydraulic control system for a crawler drilling rig according to a specific embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the regulating valve block in a specific embodiment of the present invention.

[0022] [Explanation of Labels in the Attached Image]

[0023] 11: Outrigger assembly; 12: Traveling assembly; 13: Mud pump; 14: Mixing mechanism; 15: Rotary mechanism; 16: Salvage winch; 17: Feed cylinder;

[0024] 21: Hydraulic pump unit; 22: Main system valve block; 23: Actuating valve block; 24: Regulating valve block; 241: Relief valve; 242: Directional valve; 243: Check valve; 244: Speed ​​control valve; 245: Bridge rectifier circuit. Detailed Implementation

[0025] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0026] like Figure 1 As shown, a specific embodiment of the present invention provides a hydraulic control system for a crawler drilling rig. The crawler drilling rig includes a crawler chassis assembly, and outrigger assemblies 11, a traveling assembly 12, a mud pump 13, a mixing mechanism 14, a slewing mechanism 15, a salvage winch 16, and a feed cylinder 17 mounted on the crawler chassis assembly. The hydraulic control system includes a hydraulic pump unit 21, a main system valve block 22, an actuation valve block 23, and a regulating valve block 24. The inlet of the hydraulic pump unit 21 is connected to an oil tank, and the outlet of the hydraulic pump unit 21 is connected to the main system valve block 22. The main system valve block 22 is connected to the actuation valve block 23, the mud pump 13, and the mixing mechanism 14. The actuation valve block 23 is connected to the slewing mechanism 15, the salvage winch 16, and the feed cylinder 17 to drive the feed cylinder 17 to perform a rapid rod-reversing action. The hydraulic pump unit 21 is connected to the feed cylinder 17 through the regulating valve block 24. The regulating valve block 24 can adjust the drilling pressure and drilling speed of the feed cylinder 17. The regulating valve block 24 can adjust the drilling pressure of the feed cylinder 17 in the range of 0 to 21 MPa, and the regulating valve block 24 can adjust the drilling speed of the feed cylinder 17 in the range of 0 to 5.5 m / min.

[0027] Specifically, hydraulic oil is delivered to the main system valve block 22 via the hydraulic pump unit 21. After being collected and divided by the main system valve block 22, oil is supplied to the mud pump 13, the stirring mechanism 14, and the actuation valve block 23. The actuation valve block 23 supplies oil to the rotary mechanism 15, the salvage winch 16, and the feed cylinder 17 to drive the rotary mechanism 15 and the salvage winch 16 to perform actions, and to drive the feed cylinder 17 to perform routine actions such as rapid rod reversal. At the same time, the hydraulic pump unit 21 directly supplies oil to the feed cylinder 17 via the regulating valve block 24. The drilling pressure and drilling speed of the feed cylinder 17 are adjusted by the regulating valve block 24, which can realize two modes: constant drilling pressure drilling and constant drilling speed drilling, so as to adjust and switch according to complex working conditions. Compared to existing technologies, this hydraulic system, while ensuring the basic hydraulic circuit for the normal operation of the feed cylinder 17, also features a new regulating hydraulic circuit. These two circuits operate independently, ensuring that the feed cylinder 17 can perform normal operations while also allowing for adjustments to drilling pressure and speed based on actual geological conditions. This meets the drilling needs of complex working conditions and improves drilling efficiency. Furthermore, the crawler drilling rig in this specific embodiment has an electronic control program that works in conjunction with the hydraulic system. This program can record parameters such as drilling pressure, speed, and rotational speed in real time, documenting the geological conditions of the area and providing data support for subsequent geological surveys, exploration, and construction in the region.

[0028] Furthermore, such as Figure 2As shown, the regulating valve block 24 includes a relief valve 241, a directional valve 242, and a speed control circuit. The directional valve 242 is connected to the hydraulic pump unit 21 and the oil tank. The directional valve 242 is connected to the small chamber of the feed cylinder 17 via a first oil circuit and to the large chamber of the feed cylinder 17 via a second oil circuit. The speed control circuit is located in the second oil circuit, which is also connected to a third oil circuit. The third oil circuit is connected to the oil tank. The relief valve 241 is located in the third oil circuit, and the connection point between the third and second oil circuits is closer to the feed cylinder 17 than the speed control circuit. In this specific embodiment, an electromagnetic directional valve 246 is also provided on the third oil circuit, located between the relief valve 241 and the oil tank. The directional valve 242 is a three-position four-way electromagnetic directional valve, and the relief valve 241 is a proportional relief valve. The directional valve 242 has three positions. When the directional valve is in the neutral position, the hydraulic pump is disconnected from the first and second oil circuits. When the directional valve is in the left position, oil is supplied to the small chamber of the feed cylinder 17 through the first oil circuit, and the large chamber of the feed cylinder 17 returns oil through the second oil circuit. When the directional valve is in the right position, oil is supplied to the large chamber of the feed cylinder through the second oil circuit, and the small chamber of the feed cylinder returns oil through the first oil circuit. When constant drilling pressure drilling mode is required, the directional valve 242 is in the left position, and the third oil circuit is opened through the solenoid directional valve 246. The hydraulic oil in the large chamber of the feed cylinder returns oil through the second and third oil circuits. During the return oil return, the drilling pressure can be adjusted according to the actual working conditions through the overflow valve 241 on the third oil circuit. In constant drilling pressure drilling mode, the speed control circuit is closed. Depending on the working conditions, the pressure difference between the large and small chambers of the feed cylinder 17 is changed by adjusting the pressure of the set overflow valve 241, ensuring that the feed force during construction is constant and reducing the occurrence of accidents in the borehole. When constant drilling speed mode is required, the valve core of the reversing valve 242 is in the left position, and the third oil circuit is disconnected through the solenoid reversing valve 246 of the third oil circuit. The hydraulic oil in the large chamber of the feed cylinder flows back to the oil tank through the second oil circuit and the speed control circuit. The return oil volume of the large chamber of the feed cylinder is adjusted by the speed control circuit to ensure that the feed cylinder 17 drills at a certain speed.

[0029] Furthermore, such as Figure 2 As shown, the speed control circuit includes a check valve 243, a speed control valve 244, and a bridge rectifier circuit 245. The bridge rectifier circuit 245 consists of four check valves and is located in the second oil circuit. The check valve 243 and the speed control valve 244 are located within the bridge rectifier circuit 245, which sequentially connects to the speed control valve 244 and the check valve 243. In this specific embodiment, the speed control valve 244 is a proportional speed control valve 244. The speed control circuit, composed of four check valves and one check valve 243 and the proportional speed control valve 244, ensures precise oil quantity control for both the inlet and outlet of the feed cylinder 17, thereby achieving drilling speed control of the feed cylinder.

[0030] Furthermore, such as Figure 1As shown, the hydraulic pump unit 21 includes an engine and a dual pump. The engine drives and connects to the dual pump. The inlet of the dual pump serves as the inlet of the hydraulic pump unit 21 and connects to the oil tank. The outlet of the dual pump serves as the outlet of the hydraulic pump unit 21 and connects to the main system valve block 22. The dual pump is also connected to the regulating valve block 24. Specifically, the dual pump includes a large pump and a small pump, both connected to the oil tank and driven by the engine. The large pump connects to the outrigger control valve and the travel control valve via a three-way ball valve, and supplies oil to the main system valve block 22 through the three-way ball valve. The small pump connects to the regulating valve block 24 to supply oil to the regulating oil circuit. In this specific embodiment, the crawler drilling rig has four outriggers. The four-position six-way directional valves in the outrigger control valve control the four outriggers respectively to meet different working conditions. The crawler drilling rig has a left travel motor and a right travel motor. The travel control valve controls the operation of the left and right travel motors through two electromagnetic proportional directional valves, which can be operated manually on the machine or remotely controlled by a remote control.

[0031] The hydraulic control system of the crawler drilling rig provided in this specific embodiment operates as follows: The hydraulic pump unit 21 supplies oil to the travel control valve via a three-way ball valve, driving the left and right travel motors for movement. The hydraulic pump unit 21 also supplies oil to the outrigger control valve via the three-way ball valve, controlling the four outriggers to support the ground according to the working conditions, increasing the stability of the crawler drilling rig. The hydraulic pump unit 21 supplies oil to the mud pump 13 and the mixing mechanism 14 via the main system valve block 22, and also supplies oil to the actuation valve block 23 to drive the slewing mechanism 15, the retrieval winch 16, and the feed cylinder 17 to perform routine operations. In constant drilling pressure mode, the valve core of the reversing valve 242 is in the left position. The third oil circuit is opened through the electromagnetic reversing valve 246. The hydraulic oil in the large chamber of the feed cylinder returns through the second and third oil circuits. During the return oil return, the drilling pressure can be adjusted according to the actual working conditions through the overflow valve 241 on the third oil circuit. In constant drilling pressure mode, the speed control circuit is closed. When constant drilling speed mode is required, the valve core of the reversing valve 242 is in the left position, and the third oil circuit is disconnected through the solenoid reversing valve 246 of the third oil circuit. The hydraulic oil in the large chamber of the feed cylinder flows back to the oil tank through the second oil circuit and the speed control circuit. The return oil volume of the large chamber of the feed cylinder is adjusted by the speed control circuit to ensure that the feed cylinder 17 drills at a certain speed.

[0032] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0036] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A hydraulic control system for a crawler drilling rig, the crawler drilling rig comprising a crawler chassis assembly, and a leg assembly (11), a traveling assembly (12), a mud pump (13), a mixing mechanism (14), a slewing mechanism (15), a salvage winch (16), and a feed cylinder (17) mounted on the crawler chassis assembly, characterized in that, The hydraulic control system includes a hydraulic pump group (21), a main system valve block (22), an action valve block (23), and a regulating valve block (24). The inlet of the hydraulic pump unit (21) is connected to the oil tank, and the outlet of the hydraulic pump unit (21) is connected to the main system valve block (22). The main system valve block (22) is connected to the action valve block (23), the mud pump (13) and the stirring mechanism (14) respectively. The action valve block (23) is connected to the rotary mechanism (15), the salvage winch (16) and the feed cylinder (17) respectively, so as to drive the feed cylinder (17) to make a rapid rod reversing action. The hydraulic pump assembly (21) is connected to the feed cylinder (17) through the regulating valve block (24). The regulating valve block (24) can regulate the drilling pressure and drilling speed of the feed cylinder (17); The regulating valve block (24) includes an overflow valve (241), a reversing valve (242), and a speed regulating circuit; The reversing valve (242) is connected to the hydraulic pump group (21) and the oil tank respectively. The reversing valve (242) is connected to the small chamber of the feed cylinder (17) through the first oil circuit. The reversing valve (242) is connected to the large chamber of the feed cylinder (17) through the second oil circuit. The speed regulating circuit is located in the second oil circuit. The second oil circuit is also connected to a third oil circuit. The third oil circuit is connected to the oil tank. The overflow valve (241) is located in the third oil circuit. The connection point between the third oil circuit and the second oil circuit is closer to the feed cylinder (17) than the speed regulating circuit. The speed control circuit includes a one-way valve (243), a speed control valve (244), and a bridge rectifier circuit (245). The bridge rectifier circuit (245) is located in the second oil circuit. The check valve (243) and the speed control valve (244) are located in the bridge rectifier circuit (245). The bridge rectifier circuit (245) is connected to the speed control valve (244) and the check valve (243) in sequence. The third oil line is also equipped with an electromagnetic reversing valve (246), which is located between the overflow valve (241) and the oil tank.

2. The hydraulic control system of the crawler drilling rig as described in claim 1, characterized in that, The reversing valve (242) is a three-position four-way solenoid reversing valve, and the relief valve (241) is a proportional relief valve.

3. The hydraulic control system of the crawler drilling rig as described in claim 1, characterized in that, The regulating valve block (24) can adjust the drilling pressure range of the feed cylinder (17) from 0 to 21 MPa.

4. The hydraulic control system of the crawler drilling rig as described in claim 1, characterized in that, The regulating valve block (24) can adjust the drilling speed of the feed cylinder (17) to a range of 0~5.5m / min.

5. The hydraulic control system of the crawler drilling rig as described in claim 1, characterized in that, The hydraulic pump assembly (21) includes an engine and a dual pump; The engine is connected to the dual pump, the oil inlet of the dual pump is connected to the oil tank as the oil inlet of the hydraulic pump group (21), the oil outlet of the dual pump is connected to the main system valve block (22) as the oil outlet of the hydraulic pump group (21), and the dual pump is connected to the regulating valve block (24).

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