Control system for adjusting push-pull speed and push-pull force of horizontal directional drilling machine

Abstract

The invention provides a control system for adjusting push-pull speed and push-pull force of a horizontal directional drilling machine. A first push-pull pump (1) is in pipeline connection with a first push-pull main valve (3) through a push-pull pressure adjusting valve (2); a second push-pull pump (2) is in pipeline connection with a second push-pull main valve (8); the first push-pull main valve (3) and the second push-pull main valve (8) are respectively in pipeline connection with four push-pull motors; the four push-pull motors are all provided with electromagnetic valves; a push-pull handle (13), a push-pull pressure adjusting knob (14) and a push-pull speed selecting switch (15) are all connected with a controller (12) through circuits; and the controller (12) is connected with a push-pull pressure adjusting electromagnetic valve (20) on the push-pull pressure adjusting valve (2) and the electromagnetic valves on the four push-pull motors through circuits. The control system effectively guarantees multiple gears of selection speed for the pushing and pulling of a power head in the operation of the horizontal directional drilling machine, and can adjust the push-pull force magnitude of the power head according to the project scale.

Description

technical field [0001] The invention relates to a horizontal directional drilling machine, in particular to a control system for adjusting the push-pull speed and push-pull force of the horizontal directional drill. Background technique [0002] During the construction of horizontal directional drilling rig, the forward and backward movement of the power head on the drill stand is realized by pushing forward and pulling back the electric control handle. The force is realized through the maximum pressure limit, that is, only when the maximum push-pull force exceeds the maximum pressure limit, the hydraulic system overflow valve overflows, and the hydraulic motor loses power; The power head is pushed and pulled by the hand to run faster. When the ground is hard, the operator pushes and pulls the power head to run slower. Most of the time, the operator will push and pull the power head at a medium speed to expand the tunnel. Therefore, the simple push and pull of the power head...

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies in the prior art, the present invention provides a control system for adjusting the push-pull speed and push-pull force of the horizontal directional drilling rig, which can meet the user's requirements for various push-pull speeds of the rig in complex terrain, and can effectively avoid the The use of medium and large-tonnage drilling rigs to pull back thinner or shorter pipelines and break or damage the pipelines can ensure the construction progress and construction safety of directional drilling rigs

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