RU1809035C - Blast-hole drilling device - Google Patents

Abstract

SUMMARY OF THE INVENTION: a device for drilling holes comprises a rotary drilling tool with a reversible hydraulic motor, a control valve, a throttle valve, a check valve and a control valve. The inlet of the control valve is hydraulically connected to the inlet of the hydraulic pump and to the tank for the working fluid. The outputs of the control valve are hydraulically connected to the pressure head and to the discharge hydraulic lines of the hydraulic motor of the drill tool rotator. The control valve is designed as a pressure reducing valve. The pressure line of the hydraulic motor of the sensor is hydraulically connected to the inlet of the pressure reducing valve. The outlet of the pressure reducing valve is hydraulically connected to the pressure line of the hydraulic motor of the rotator of the drilling tool; 1 silt

Description

FIELD: mining. SUBSTANCE: invention relates to mining industry, in particular, to devices for drilling holes for anchor support.

The purpose of the invention is to simplify the design. This ensures the compactness of the device, reducing its weight and the complexity of manufacturing.

A comparative analysis of the claimed solution with the prototype shows that the claimed device is distinguished by the performance of the control valve in the form of a pressure reducing valve, as well as by hydraulic connection of the pressure hydraulic line of the hydraulic motor of the feeder with the input, and the pressure hydraulic line of the hydraulic motor of the rotator of the drilling tool with the output of the pressure valves, and drain hydraulic lines and. the hydraulic motor of the feeder, and the hydraulic motor of the rotator of the drilling tool are hydraulically connected to the output of the control valve.

Such a technical solution makes it possible to use a pressure reducing valve as a regulator of the flow of the working fluid and, in particular, to change the direction of the latter. The aforementioned features of the hydraulic connection of the pressure reducing valve, the control valve, the hydraulic motor of the rotary tool of the drilling tool and the hydraulic motor of the feeder to each other allow for feedback between the hydraulic actuators of rotation of the drilling tool and its supply, and thus automatically adjust the operating mode of the device depending on the specific drilling conditions . Simplification of the design of the proposed device, while achieving the same positive effect as in the prototype,

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is ensured by eliminating the whole series of elements present in the latter.

The drawing shows a diagram of the proposed device.

The device for drilling holes includes a rotator of a drilling tool with a reversible hydraulic motor (GDV) 1, a feeder, for example, a screw, with a reversible hydraulic motor (GDP) 2, a control valve made in the form of a pressure reducing valve 3, and a control valve 4, whose inputs connected respectively to the outlet of the hydraulic pump 5 and the tank for the working fluid b. With the corresponding outputs of the control valve 6, a pressure head 7 and a drain 8 of the hydraulic manifold (GM) of the GDV 1 are connected. In the drain GM 8, a throttle 9 and a check valve 10 are installed in parallel with each other. outlet 15. The tapered part of the 13-valve 3 is divided into two cavities: rodless 16 and rod 17. The outlet 11 of the pressure reducing valve 3 is hydraulically connected to the pressure head GM 18 GTP 2, and to the outlet 15 of the valve 3 - pressure head GM 7 GDV 1. Drain line 19 GDP 2 is hydraulically connected to the same e the output of the control valve 4, which is hydraulically connected, drain GM8GDV1.

A device for drilling holes works as follows.

The device is installed in the place of drilling. In the initial position due to the spring 14, the pressure reducing valve 3 is fully open.

When the device is turned on, the spool valve 4 moves to position 1. At the same time, the working fluid under pressure enters from the hydraulic pump 5 through the channel of the distributor 4 and pressure head GM 7 enters the hydraulic control unit 1. As a result, the drilling tool starts working rotation, while the working fluid in GM 8, through the check valve 10 and the distributor channel 4 enters the drain to the tank 6. Simultaneously, the working fluid from the pressure GM 7 through outlet 15, rodless cavity 16, rod cavity 17, inlet 11 of the pressure reducing valve 3 and pressure GM 18 post falls in the hydraulic fracturing unit 2, providing translational movement to the bottom of the drilling tool. From the hydraulic distributor 2, the working fluid through the drain GM 19 through the channel of the distributor 4 enters the tank 6.

The throttle 9 and check valve 10, installed parallel to each other in the drain GM 8 GDV 1, having a certain

resistance, create initial pressure in pressure head GM 7, ensuring the normal operation of hydraulic shutdown 2 in the starting period. In contact with breed layers

or rock drilling, the drilling forces increase, which increases the pressure in the pressure head GM 7. This, in turn, increases the pressure in the rodless cavity 16 of the pressure reducing valve 3, as a result of which the plunger 12, compressing the spring 14, moves down. The conical portion 13 of the plunger 14 reduces the clearance of the passage opening so that the amount of fluid flowing through the GM 18 to the flow control valve 2 is reduced, which causes

5 reduction in the feed rate of the drilling tool to the face.

With a further increase in the drilling force, the pressure in the rodless cavity 16 of the pressure reducing valve 3, respectively

0 increases, and the conical portion 13 of the plunger 14 can completely block the bore of the valve 3, which causes the drilling tool to stop feeding. In this case, the rotation of the drilling tool continues, which avoids breakage or jamming.

After the passage of the rocky layer, the drilling force is reduced, which reduces the pressure in the rodless cavity 16 of the pressure reducing valve 3. The spring 14 pushes the plunger 12 upwards, increasing the bore of the valve 3 and, consequently, the amount of fluid flowing through it to the hydraulic valve 2, As a result, the feed rate 5th drilling tool to the face increases. In this way, the drilling mode is automatically controlled according to specific operating conditions.

After drilling, the spool of the hydraulic distributor 4 is moved to position P. In this case, the working fluid from the hydraulic pump 5 through the channel of the distributor 4, the throttle 9, GM 8 enters the GDV 1, the shaft of which begins to rotate in

5 on the reverse side, and the rotation speed is low due to the small passage section of the throttle 9. The non-return valve 10 is thus closed.

At the same time, the working fluid from 0 coca 6 through the channel of the distributor 4 and GM 19 enters the hydraulic distributor 2, from where it is then diverted to the drain through the GM 18, inlet 11, rod cavity 17, rodless cavity 16. outlet 15 of pressure reducing valve 3, GM 7 and the channel

5 valve 3, entering the tank 6. Since the cavity 16 is connected to the drain, the pressure reducing valve 3 is fully open. Due to the small through cross-section of the throttle 9, the main volume of the working fluid under pressure passes through the hydraulic fracturing unit 2, providing a quick removal of the drilling tool to its original position. The slow rotation of the drill, which occurs in this case, facilitates its removal from the hole. If it is necessary to withdraw the drilling tool from the borehole without rotating it, the inductor 9 should be excluded from the device diagram.

Claims (1)

SUMMARY OF THE INVENTION A device for drilling holes, comprising a rotary tool for drilling with a reversible hydraulic motor, a feeder with a reversible hydraulic motor, a directional valve, the inlets of which are hydraulically connected respectively to the outlet of the hydraulic pump and to the hydraulic fluid tank, hydraulically connected to the corresponding outlet of the directional valve, a pressure and drain hydraulic line hydraulic motor of the rotator of the drilling tool mounted parallel to each other in tidal line rotator of the hydraulic motor of the drilling tool, a choke t non-return valve, pressure and drain hydraulic lines of the hydraulic motor of the feeder and control valve, distinguished by the fact that, in order to simplify the design, the control valve is made in the form of a pressure reducing valve, while the hydraulic line of the hydraulic motor of the feeder is hydraulically connected to the inlet of the pressure reducing valve, and the pressure line of the hydraulic motor of the rotator of the drilling tool rotator is hydraulically connected to the outlet of the pressure reducing valve, and the drain hydraulic line of the hydraulic motor of the feeder is hydraulically connected to the outlet of the control valve to which the drain is hydraulically connected hydraulic motor line of the rotator of the drilling tool.