SU310008A1 - DRIVE TO WELL DRILLING DEVICE - Google Patents

Description

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A drive to a drilling device is known, which includes a pump, pressure and discharge lines, a ram cylinder, rotation hydraulic motors, control spools and a feed rate regulator.

Such a drive does not have automatic devices for adjusting the speed of the vertical feed depending on the torque moment of resistance to rotation and thus maintaining the optimum mode of operation in terms of power and torque at the working tool.

The described actuator differs from the known one in that its feed rate regulator is designed as a spring-loaded and installed between the thrust and discharge lines of the throttling spool supply cylinder, the hydraulic control chamber of which is connected to the rotary motor of the revolving motors. The lines of the latter are interconnected by a two-position spool connected to the cavities of the power cylinder by means of an additional valve, controlled, for example, by a cam mounted on the body of the power cylinder. This ensures that the device automatically adjusts to the optimal mode.

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The drive contains two autonomous hydraulic systems. The hydraulic system, driven by a pump /, provides a vertical flow of the power cylinder 2 and consists of a safety valve 3, a hydraulic distributor 4 and a pressure line 5. The hydraulic system, driven by a pump 6, is designed to rotate the drill 7 at the first and second speed and includes spools 8 and 9 controls, hydraulic motors 10 and 11, and pressure line 12. Both systems can have the same oil tank 13.

The hydraulic motors 10 and 11 are connected to the power cylinder 2 by a gear 14, which rotates the power cylinder together with the drill.

The speed regulator is designed as a throttling spool 15, spring-loaded

spring 16, and is installed between pressure 17 and drain 18 lines. Its hydraulic control chamber 19 of the pipeline 20 is connected to the pressure line 21.

The spool 9 is made of two-position, interconnecting the pressure and discharge lines. It is connected to the rodless 22 and the 23 slot cavities of the power cylinder by means of an additional spool 24 controlled by the cam 25 fixed to. The drive to the well drilling device works as follows. At the first rotational speed of the ram 2, the entire oil flow from the pump 6, having passed the valve 8, is divided into two parts in the tee 26 and in equal volumes goes to the hydraulic motors 10 and //. At the same time, the on-off spool 9 passes the oil flow from the pipeline 27 to the pipeline 28. With an increase in the torque on the drill, the pressure in the pipeline 20, the pressure line 21 and the hydraulic control chamber 19 of the throttling valve 15 increases. As the pressure in the chamber 19 increases, the plunger 29 overcomes the force of the spring 16 and, moving, opens the drain of oil through the pipe 18 from the pressure pipe 17 connected to the cavity 22 of the power cylinder to the tank 13. As a result, the feed rate of the drill is reduced or completely stopped eats feed. At this time, part of the power of the prime mover consumed by the pump 1 is released, which through the pump 6 is supplied to the motors 10 to 11 to overcome the increased cutting resistance. When the torque decreases, for example, after turning or grinding the stone, the pressure in the pipe 20, the pressure line 21 and the chamber 19 decreases, the plunger 29 moves to the previous position under the action of the spring 16, separating the line 30 and 18 or reducing the flow area of the slide 15 between them. The oil flow from the pump / into the rodless cavity of the cylinder increases or resumes. At the second increased speed, the on-off slide valve moves to the second position. Then he blocks the access of oil from pipeline 27 to pipeline 28 and opens the latter’s communication with pipeline 31. At the same time, all the oil flow pumped by pump 6 through pipeline 32 goes only to hydraulic motor 10, thereby increasing the rotation speed of the shaft of the latter. The hydraulic motor 11, coupled by gear, to the hydraulic motor 10, rotates at the same speed, idling operation. In this position of the on-off slide valve, oil circulates freely through the hydraulic motor //. The control of switching on, switching off and changing the speed of rotation of the drill 7 occurs automatically as follows. The right chamber (not shown in the diagram) of the on-off spool 9 is connected by pipeline 33 and spool 24 to pipeline 34 leading to the rod end 23 of the power cylinder, and its left chamber (not shown in the diagram) pipeline 35 is connected to trunk 17, leading to the rodless cavity 22 of the power cylinder. Normally, the on-off slide valve is in the neutral position, providing communication between the pipelines 36 and 27, therefore, when the reverse slide valve 8 is turned on, oil from the pump 6 circulates to the drain, the mine motors. When the drill is turned on, the pressure in the pressure line 17 and the pipeline 35 increases and moves the two-way slide valve to the first (right) position corresponding to the working speed of rotation of the drill, which starts to rotate. When the feed is turned off and the drill is raised, the pressure in line 17 decreases, the two-way slide valve moves to the neutral position and the rotation of the drill stops, it rises without rotating. Upon reaching a certain height, the cam 25 opens the spool 24, which establishes the message of the right control chamber of the spool 9 through the pipeline 33 with the lift pipeline 34, and the spool moves to the left, thereby activating the second speed. The first rotational speed is used for drilling, the second speed is used when scattering raised brown soil above the surface of the well. Subject of the Invention A drive to a well drilling device, including a pump, pressure and drain lines, a ram cylinder, hydraulic motors, control spools and a feed rate controller, characterized in that, in order to provide an automatic adjustment of the device to the optimum mode, made in the form of a spring-loaded throttling and installed between the pressure and drain lines of the spool supply cylinder, the hydraulic control chamber of which is connected to the pressure line of the hydraulic motors, wherein the hydraulic line connected between a two-position slide valve associated with the cylinder cavities through the additional valve, controlled, e.g., a cam attached to the housing of the actuator.