1. A load-sensitive hydraulic system for inclination adjustment of a drilling machine is characterized in that: the hydraulic pump, the high-pressure filter, the multi-way valve and the hydraulic motor are sequentially communicated, and the hydraulic motor is connected with a rack;

the multi-way valve comprises an oil inlet P port, an oil return port T port, a working oil port A port and a working oil port B port, the working oil port A port of the multi-way valve is connected with a check valve and a throttle valve which are connected in parallel, the check valve and the throttle valve are respectively communicated with a working oil port of the hydraulic motor, a sequence valve which is connected in parallel with the check valve is further arranged between the throttle valve and the hydraulic motor, and the working oil port B port is connected with the working oil port of the hydraulic motor.

2. The load sensitive hydraulic system for drill rig pitch adjustment of claim 1, wherein: the hydraulic pump and the multi-way valve are both connected with an oil tank for storing hydraulic oil; the hydraulic pump is connected with a motor for providing power input.

3. The load sensitive hydraulic system for drill rig pitch adjustment of claim 2, wherein: the motor is an intrinsically safe explosion-proof three-phase asynchronous motor.

4. The load sensitive hydraulic system for drill rig pitch adjustment of claim 2, wherein: the hydraulic pump is a load-sensitive pump which outputs corresponding flow according to the required control quantity, an oil suction port of the hydraulic pump is connected with the oil tank, and an oil outlet of the hydraulic pump is connected with an oil inlet of the filter.

5. The load sensitive hydraulic system for drill rig pitch adjustment of claim 4, wherein: the multi-way valve is a load-sensitive multi-way valve, wherein a control oil port X of the load-sensitive pump is connected with a load feedback port Ls of the multi-way valve, so that the load sensitivity of flow and pressure is realized.

6. The load sensitive hydraulic system for drill rig pitch adjustment of claim 5, wherein: the multi-way valve is of a split structure, and the forward and reverse rotation of the hydraulic motor is controlled through the reversing operation of the multi-way valve.

7. The load sensitive hydraulic system for drill rig pitch adjustment of claim 1, wherein: the multi-way valve is connected with a pressure gauge for monitoring the system pressure in real time.

8. A working method for a load-sensitive hydraulic system for adjusting the inclination angle of a drilling rig by applying the load-sensitive hydraulic system for adjusting the inclination angle of the drilling rig as claimed in any one of claims 1 to 7 is characterized by comprising the following steps of:

s1 adjusting the positive inclination angle of the frame:

when the motor rotates, the hydraulic pump is driven to suck oil from the oil tank, the oil is filtered under the action of the high-pressure filter, the oil enters the port P of the oil inlet of the multi-way valve, the upper position is communicated through the reversing operation of the multi-way valve, the oil enters the hydraulic motor through the one-way valve, an oil return path finally returns to the oil tank through the port T of the oil return port of the multi-way valve, and the motor rotates forwards to drive the forward inclination angle of the rack to adjust the price and gradually increase the forward inclination angle to 90 degrees from the horizontal angle;

s2 adjustment of negative inclination angle of rack:

when the motor rotates, the hydraulic pump is driven to suck oil from the oil tank, the oil is filtered under the action of the high-pressure filter, the oil enters the port P of the oil inlet of the multi-way valve, the lower part is connected through the reversing operation of the multi-way valve, the oil inlet flows into the hydraulic motor, the oil outlet flows through the sequence valve and then flows through the throttle valve, the back pressure of the oil return path can be set through setting the opening pressure of the sequence valve, the oil return path is throttled through the throttle valve, the rotating speed of the hydraulic motor can be adjusted, the rotating speed of the frame can be adjusted, and finally the oil return path returns to the oil tank through the multi-way valve.

Background

Along with the rapid development of economic construction, the technical field of engineering machinery makes remarkable progress, wherein a drilling machine is mechanical equipment for driving a drilling tool to drill in any direction to obtain real geological data in geological exploration. For example, in the process of underground coal mining, because coal seam occurrence conditions are complex and changeable, and major gas accidents often occur, in order to prevent local gas safety accidents of coal mines and achieve effective gas extraction and utilization, a drainage drilling machine is used for drilling a detection hole before excavation, and gas under a mine is detected, released and utilized, so that gas explosion accidents are avoided.

However, the drilling machine used for coal mine underground gas treatment drilling in the prior art has the following defects and deficiencies: the underground coal mine gas control drilling engineering in China is huge every year, almost all coal mines adopt the traditional manual measuring method to calibrate the inclination angle and the azimuth angle at present, the operation procedure is quite complicated, the drilling stabilizing time is long, and the precision is low. Namely how to rapidly and accurately control the inclination angle of the opening is an urgent problem to be solved in the field.

Disclosure of Invention

In view of the above, the invention aims to provide a load-sensitive hydraulic system for adjusting the inclination angle of a drilling machine and a working method thereof, so that the accurate and stable adjustment of the inclination angle of a rack of the drilling machine is realized.

In order to achieve the purpose, the invention provides the following technical scheme: a load sensitive hydraulic system for adjusting the inclination angle of a drilling machine comprises a hydraulic pump, a high-pressure filter, a multi-way valve and a hydraulic motor which are sequentially communicated, wherein the hydraulic motor is connected with a rack;

the multi-way valve comprises an oil inlet P port, an oil return port T port, a working oil port A port and a working oil port B port, the working oil port A port of the multi-way valve is connected with a check valve and a throttle valve which are connected in parallel, the check valve and the throttle valve are respectively communicated with a working oil port of the hydraulic motor, a sequence valve which is connected in parallel with the check valve is further arranged between the throttle valve and the hydraulic motor, and the working oil port B port is connected with the working oil port of the hydraulic motor.

Optionally, the hydraulic pump and the multi-way valve are both connected with an oil tank for storing hydraulic oil; the hydraulic pump is connected with a motor for providing power input.

Optionally, the motor is an intrinsically safe explosion-proof three-phase asynchronous motor.

Optionally, the hydraulic pump is a load-sensitive pump outputting a corresponding flow rate according to a required control amount, an oil suction port of the hydraulic pump is connected with the oil tank, and an oil outlet of the hydraulic pump is connected with an oil inlet of the filter.

Optionally, the multi-way valve is a load-sensitive multi-way valve, wherein a control oil port X of the load-sensitive pump is connected with a load feedback port Ls of the multi-way valve, so that load sensitivity of flow and pressure is realized.

Optionally, the multi-way valve is of a split structure, and the forward rotation and the reverse rotation of the hydraulic motor are controlled through reversing operation of the multi-way valve.

Optionally, the multiway valve is connected with a pressure gauge for monitoring the system pressure in real time.

The working method for the inclination angle adjusting load sensitive hydraulic system of the drilling machine is applied to the inclination angle adjusting load sensitive hydraulic system of the drilling machine, and comprises the following steps:

s1 adjusting the positive inclination angle of the frame:

when the motor rotates, the hydraulic pump is driven to suck oil from the oil tank, the oil is filtered under the action of the high-pressure filter, the oil enters the port P of the oil inlet of the multi-way valve, the upper position is communicated through the reversing operation of the multi-way valve, the oil enters the hydraulic motor through the one-way valve, an oil return path finally returns to the oil tank through the port T of the oil return port of the multi-way valve, and the motor rotates forwards to drive the forward inclination angle of the rack to adjust the price and gradually increase the forward inclination angle to 90 degrees from the horizontal angle;

s2 adjustment of negative inclination angle of rack:

when the motor rotates, the hydraulic pump is driven to suck oil from the oil tank, the oil is filtered under the action of the high-pressure filter, the oil enters the port P of the oil inlet of the multi-way valve, the lower part is connected through the reversing operation of the multi-way valve, the oil inlet flows into the hydraulic motor, the oil outlet flows through the sequence valve and then flows through the throttle valve, the back pressure of the oil return path can be set through setting the opening pressure of the sequence valve, the oil return path is throttled through the throttle valve, the rotating speed of the hydraulic motor can be adjusted, the rotating speed of the frame can be adjusted, and finally the oil return path returns to the oil tank through the multi-way valve.

The invention has the beneficial effects that: the invention relates to a load-sensitive hydraulic system for adjusting the inclination angle of a drilling machine and a working method thereof.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is an overall schematic diagram of a load sensitive hydraulic system for drill rig pitch adjustment according to the present invention.

Reference numerals: the hydraulic control system comprises an oil tank 1, a motor 2, a hydraulic pump 3, a filter 4, a multi-way valve 5, a pressure gauge 6, a one-way valve 7, a throttle valve 8, a sequence valve 9, a hydraulic motor 10 and a frame 11.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.

Referring to fig. 1, the load sensitive hydraulic system for adjusting the inclination angle of the drilling machine comprises a hydraulic pump 3, a high pressure filter 4, a multi-way valve 5 and a hydraulic motor 10 which are sequentially communicated, wherein the hydraulic motor 10 is connected with a frame 11; the multi-way valve 5 comprises an oil inlet P port, an oil return port T port, a working oil port A port and a working oil port B port, the working oil port A port of the multi-way valve 5 is connected with a check valve 7 and a throttle valve 8 which are connected in parallel, the check valve 7 and the throttle valve 8 are respectively communicated with a working oil port of a hydraulic motor 10, a sequence valve 9 which is connected with the check valve 7 in parallel is further arranged between the throttle valve 8 and the hydraulic motor 10, and the working oil port B port is connected with the working oil port of the hydraulic motor 10. The hydraulic pump 3 and the multi-way valve 5 are both connected with an oil tank 1 for storing hydraulic oil; the hydraulic pump 3 is connected with a motor 2 for providing power input, and the motor 2 is an intrinsically safe explosion-proof three-phase asynchronous motor. The hydraulic pump 3 is a load-sensitive pump which outputs corresponding flow according to the required control quantity, an oil suction port of the hydraulic pump is connected with the oil tank 1, and an oil outlet of the hydraulic pump is connected with an oil inlet of the filter 4. The multi-way valve 5 is a load-sensitive multi-way valve 5, wherein a control oil port X of the load-sensitive pump is connected with a load feedback port Ls of the multi-way valve 5, so that the load sensitivity of flow and pressure is realized. The multi-way valve 5 is of a split structure, and the forward and reverse rotation of the hydraulic motor 10 is controlled by the reversing operation of the multi-way valve 5. The multiway valve 5 is connected with a pressure gauge 6 for monitoring the system pressure in real time.

The oil tank 1 is a component for storing hydraulic oil in a hydraulic system and plays a role in cooling and radiating to a certain extent; the motor 2 is an intrinsically safe explosion-proof three-phase asynchronous motor and can provide power input for the hydraulic pump 3; the hydraulic pump 3 is a load-sensitive pump, can output corresponding flow according to the required control quantity, can realize the conversion from mechanical energy to hydraulic energy under the drive of the motor 2, provide power for the whole hydraulic system; the filter 4 is a high-pressure filter 4, is a hydraulic auxiliary, and can filter impurities for a hydraulic system, ensure the oil cleanliness of the hydraulic system and prevent oil pollution; the multi-way valve 5 is a load-sensitive multi-way valve 5, and can feed back pressure, flow and power change signals to the multi-way valve 5, so that the control function of the valve can be realized, and the action of the hydraulic motor 10 can be accurately controlled; the pressure gauge 6 is also a hydraulic auxiliary part and is used for monitoring the pressure of the system in real time; the one-way valve 7 is a directional control valve, so that oil can only flow in one direction; the throttle valve 8 can adjust the flow rate of the outlet of the hydraulic motor 10, and control the rotating speed of the hydraulic motor 10; the sequence valve 9 is a pressure control valve, adopts an internal control internal oil drainage mode, sets the opening pressure of the sequence valve 9 by adjusting the acting force of a spring, and the sequence valve 9 is used as a back pressure valve of an oil return path of the hydraulic motor 10, so that the hydraulic motor 10 can stably run; the hydraulic motor 10 is a hydraulic actuator, and performs a rotary motion, the frame 11 is used for installing a main machine part of the drilling machine and is connected with the hydraulic motor 10, and the inclination angle of the frame 11 can be adjusted through the rotation of the hydraulic motor 10.

The hydraulic pump 3 is connected with the motor 2, the hydraulic pump 3 is a load-sensitive pump, an oil suction port of the hydraulic pump is connected with the oil tank 1, an oil outlet of the hydraulic pump is connected with an oil inlet of the filter 4, one end of the oil outlet of the filter 4 is connected with the pressure gauge 6, the other end of the oil outlet of the filter is connected with an oil inlet P port of the multi-way valve 5, an oil return port T port of the multi-way valve 5 is connected with the oil tank 1, a working oil port A port of the multi-way valve 5 is connected with the check valve 7 and the throttle valve 8 in parallel, a working oil port B port of the hydraulic motor 10 is connected with a working oil port of the hydraulic motor 10, and the working oil ports of the hydraulic motor 10 are connected with the sequence valve 9 and the check valve 7 in parallel; the frame 11 is provided with a hydraulic motor 10, and the inclination angle of the frame 11 can be adjusted by hydraulic rotation.

Further, the motor 2 is an intrinsically safe explosion-proof three-phase asynchronous motor; the hydraulic pump 3 is a load-sensitive pump, the multi-way valve 5 is a load-sensitive multi-way valve 5, and a control oil port X port of the load-sensitive pump is connected with a load feedback port Ls port of the multi-way valve 5, so that the load sensitivity of flow and pressure is realized. The multi-way valve 5 is of a split structure, and the forward and reverse rotation of the hydraulic motor 10 can be controlled by reversing operation of the multi-way valve 5.

The working method for the inclination angle adjusting load sensitive hydraulic system of the drilling machine is applied to the inclination angle adjusting load sensitive hydraulic system of the drilling machine, and comprises the following steps:

s1 rack 11 positive rake adjustment:

when the motor 2 rotates, the hydraulic pump 3 is driven to suck oil from the oil tank 1, the oil is filtered under the action of the high-pressure filter 4, the oil enters the oil inlet P port of the multi-way valve 5, the oil is switched on at the upper position through the reversing operation of the multi-way valve 5, the oil enters the hydraulic motor 10 through the one-way valve 7, an oil return path finally returns to the oil tank 1 through the oil return port T port of the multi-way valve 5, and the motor rotates forwards to drive the forward inclination angle of the rack 11 to adjust the price, and the horizontal angle is gradually increased to 90 degrees forwards;

s2 negative tilt adjustment of gantry 11:

when the motor 2 rotates, the hydraulic pump 3 is driven to suck oil from the oil tank 1, the oil is filtered under the action of the high-pressure filter 4, the oil enters the oil inlet P port of the multi-way valve 5, the oil enters the hydraulic motor 10 through the reversing operation of the multi-way valve 5 and the lower port of the multi-way valve 5, the oil flows into the hydraulic motor 10, the oil flows through the sequence valve 9 and then flows through the throttle valve 8, the back pressure of the oil return path can be set through setting the opening pressure of the sequence valve 9, the oil return path is throttled through the throttle valve 8, the rotating speed of the hydraulic motor 10 can be adjusted, the rotating speed of the adjusting rack 11 is further adjusted, and finally the oil return path returns to the oil tank 1 through the multi-way valve 5.

Because the declination of the frame 11 is accelerated under the influence of the dead weight of the frame 11 when the negative inclination angle of the frame 11 is adjusted, for this reason, the motor oil return path passes through the sequence valve 9, the backpressure is set, the stable adjustment of the frame 11 is realized, the adjusting speed of the frame 11 can be controlled by the oil return throttling, and the port X of the control oil port of the hydraulic pump 3 is connected with the port Ls of the load sensitive feedback port of the multi-way valve 5. The hydraulic pump 3 and the load sensitive system of the multi-way valve 5 are matched with each other, corresponding flow is output according to required control quantity, and 'supply on demand' is realized, so that the whole hydraulic system can realize the improvement of efficiency and reduce energy consumption loss.

Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.