Single-pump hydraulic control loop of key drilling action of cutting drill rig

A control circuit and a key technology, applied in the automatic control system of drilling, the driving device for drilling in the wellbore, mechanical equipment, etc. Slow speed and other problems, to achieve the effect of shortening the operation cycle time, improving automatic adaptability and improving operation efficiency

Active Publication Date: 2014-05-21
SUNWARD INTELLIGENT EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the cutting drilling rig hydraulic system based on the improvement and development of the hydraulic system of the excavator has the advantages of simplicity and ease of operation, which shortens the development cycle of the cutting drilling rig hydraulic system, but this system has inherent limitations. Poor drilling adaptability when changing
Decompression type constant pressure propulsion control, when the pressure of the decompression valve is set, the propulsion force is a constant value during the drilling process. In soft rock geology, under the same rotation speed of the power head, although the hardness of the rock formation is soft, the drill bit will The feed rate of the drill bit is relatively large, and the establishment of rotary resistance is relatively high; in hard rock geology, under the same rotation speed of the power head, although the hardness of the rock formation is relatively hard, the feed rate of the single turn of the drill bit is small, and the establishment of rotary resistance is low; When the geology of the rock formation changes from soft rock to hard rock during the drilling process, the feed rate of the single turn of the drill bit becomes smaller, and the required flow rate for propulsion decreases. The speed decreases instead; when the rock formation changes from hard rock to soft rock during the drilling process, the single-turn feed of the drill bit becomes larger, and the flow required for propulsion increases, the rotary speed becomes slower, the rotary resistance builds up, and the drilling speed Faster, but the rotation resistance rises to a certain value, causing stuck pipe
At the same time, the cutting drilling rig hydraulic system developed based on the improvement of the excavator system has irrationality in the control performance of the hole lifting rod, the speed of the hole lifting rod is slow, or the rotation of the power head is stopped and the flow of the main control valve rotation joint is combined to the propulsion main body. The oil circuit increases the speed of lifting the rod, but stops the rotation. If a large piece of broken stone slides into the hole, it will cause sudden sticking. Therefore, the key rock drilling action of the cutting rig needs a special hydraulic control circuit that is more suitable for its working conditions.

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  • Single-pump hydraulic control loop of key drilling action of cutting drill rig
  • Single-pump hydraulic control loop of key drilling action of cutting drill rig

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Embodiment Construction

[0013] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0014] A single-pump hydraulic control circuit for the key rock drilling actions of a cutting rig. It is composed of a load-sensitive variable pump 1, a load-sensitive proportional multi-way valve 2, a rotary motor 3, a propulsion cylinder 4, a hydraulic oil tank 8, etc. The main oil circuit is composed of the rock drilling logic control block 5, the rotary pilot handle 6, and the propulsion pilot handle 7 to form the key rock drilling action logic control and pilot control oil circuit of the cutting rig.

[0015] The function and configuration features of the load-sensing proportional multi-way valve 2 are: each valve has a differential pressure compensator and its load-sensitive external control port, and the propulsion-linked multi-way valve 23 differential pressure compensator has an independent load of A3 and B3 ports. Sensitive external control por...

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Abstract

A single-pump hydraulic control loop of a key drilling action of a cutting drill rig comprises a load-sensitive variable pump, a load-sensitive multi-way valve, a rotary motor, a propulsion oil tank, a drilling logic control block, a rotation guide handle, a propulsion guide handle, and a hydraulic oil tank. An oil inlet of the load-sensitive variable pump is connected with the hydraulic oil tank. An oil outlet and a load-sensitive opening of the load-sensitive variable pump are connected with an oil inlet and a load-sensitive opening of the load-sensitive multi-way valve respectively. Each valve pressure difference compensator of the load-sensitive multi-way valve is provided with an external control opening. The external control openings are connected with the drilling logic control block. The rotation guide handle and the propulsion guide handle are connected with the drilling logic control block or a guide control opening of the load-sensitive multi-way valve. The double-pump hydraulic control loop has the advantages that power head rotation-proportion-controlled propulsion is achieved, high-speed rotating with propulsion prior to rotation is achieved, fast rod lifting while retaining certain rotation speed is achieved, and the like.

Description

Technical field [0001] The invention relates to a single-pump hydraulic control circuit for a key rock drilling action of a cutting drill. Background technique [0002] The cutting drilling rig is a new type of rock drilling rig. Its operation mechanism is high-speed rotary crushing drilling. The drilling operation of shale, sandstone and other rock formations has the outstanding advantages of high speed, efficiency, simplicity and convenience. Comprehensive analysis of the current brand cutting drilling rig hydraulic systems , Are based on the simple improvement and development of small or medium excavator hydraulic system. Compared with the excavator, the cutting drill subtracts the three actions of boom yaw, breaker and bucket, and adds three actions of power head propulsion, power head rotation, and air compressor. It uses the excavator main control valve yaw linkage, The breaker linkage and the bucket linkage realize the control of the three actions of the cutting drill pow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B4/02E21B44/06F15B11/02F15B13/02
Inventor 王东升马海淮赵宏强林宏武
Owner SUNWARD INTELLIGENT EQUIP CO LTD
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