CN109944835B - Hydraulic system of drilling machine and drilling machine - Google Patents
Hydraulic system of drilling machine and drilling machine Download PDFInfo
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- CN109944835B CN109944835B CN201910260267.7A CN201910260267A CN109944835B CN 109944835 B CN109944835 B CN 109944835B CN 201910260267 A CN201910260267 A CN 201910260267A CN 109944835 B CN109944835 B CN 109944835B
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- 238000005553 drilling Methods 0.000 title claims abstract description 72
- 239000003921 oil Substances 0.000 claims abstract description 291
- 238000005520 cutting process Methods 0.000 claims abstract description 6
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 5
- 230000009471 action Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 238000013461 design Methods 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000007792 addition Methods 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
The invention provides a hydraulic system of a drilling machine and the drilling machine, when the forward rotation pressure of a rotary motor reaches a pressure set value of an anti-sticking valve, forward rotation control oil of the rotary motor opens a sequence valve of the anti-sticking valve, and a hydraulic reversing valve of the anti-sticking valve is simultaneously reversed, so that a hydraulic cylinder is changed from a pushing state to a retreating state, the rotary motor continuously rotates forward, and drilling tools discharge drill cuttings, thereby preventing the problem of sticking drilling; when the drill rod is unloaded by the drilling machine, the reversing valve is controlled to be in the middle position, and the reversing control oil of the rotary motor opens the sequence valves of the first balance valve and the second balance valve, so that the oil paths of the feeding end and the retreating end of the hydraulic cylinder are communicated, the hydraulic cylinder is in a floating state, and the situation that the threads of the drill rod are damaged when the drill rod is dismounted is effectively avoided; when the reversing valve is in the middle position and the rotary motor is not reversed, the check valves of the first balance valve and the second balance valve seal hydraulic oil in the oil way in the hydraulic cylinder, and the check valves are used for preventing the power head of the drilling machine from falling when the drilling tool drills in the elevation angle or the depression angle.
Description
Technical Field
The invention relates to the technical field of drilling machines, in particular to a hydraulic system of a drilling machine and the drilling machine.
Background
The hydraulic drilling machine is production equipment commonly used in coal mine gas extraction operation. The hydraulic system of the drilling machine converts mechanical energy into pressure energy of liquid by using a hydraulic pump, converts the pressure energy of the liquid into mechanical energy by various control valves, pipelines and hydraulic elements, and drives a working mechanism to realize linear reciprocating motion or rotary motion; the design quality of the hydraulic system of the drilling machine plays a decisive role in the overall performance of the hydraulic drilling machine.
The hydraulic drilling machine in the existing design often has the problem of drill sticking in the drilling process, so that the production operation is interrupted, and the production operation process is seriously influenced;
When the drill rod is disassembled by the hydraulic drilling machine in the existing design, the chuck and the clamp of the drilling machine clamp two drill rods respectively, as shown in fig. 1, the drill rods (external threads) are reversed to form the drill rods (internal threads), the lengths of the two drill rods are increased after the threads are unscrewed, and if the distance between the chuck and the clamp is kept unchanged, the threads of the drill rods are damaged;
And the condition that the power head stalls and falls frequently occurs when the hydraulic drilling machine in the existing design drills in an elevation angle or a depression angle, so that the production operation process is seriously influenced, and even safety accidents are caused.
Therefore, the hydraulic system and the drilling machine which can prevent the drill from being jammed, cannot damage the threads of the drill rod when the drill rod is disassembled, and can prevent the power head from being stalled and falling when the drill rod is drilled at an elevation angle or a depression angle are provided, and the technical problem to be solved by the person skilled in the art is urgent.
Disclosure of Invention
The invention aims to provide a hydraulic system of a drilling machine and the drilling machine, and aims to solve the problems that in the prior art, the hydraulic drilling machine in the existing design frequently has a problem of drill sticking in the drilling process, drill rod threads are damaged when a drill rod is disassembled, and a power head stalls and falls when the drill rod is drilled in an elevation angle or a depression angle.
In order to solve the technical problem, the invention provides a hydraulic system of a drilling machine, comprising:
The hydraulic cylinder, the anti-sticking drill valve, the reversing valve, the rotary motor, the first balance valve and the second balance valve;
an oil way between a backward oil port of the hydraulic cylinder and a first working oil port of the reversing valve is marked as a backward oil way, and an oil way between a feeding oil port of the hydraulic cylinder and a second working oil port of the reversing valve is marked as a feeding oil way;
The anti-sticking drill valve comprises a hydraulic reversing valve and a sequence valve connected with the hydraulic reversing valve, and two working oil ports of the anti-sticking drill valve are respectively arranged on the feeding oil way and the retreating oil way; two oil inlets of the anti-sticking drill valve are respectively arranged on the feeding oil way and the retreating oil way; the oil drain port of the anti-sticking drill valve is connected with an oil return tank; the control oil port of the anti-sticking valve is connected with the forward rotation oil port of the rotary motor;
The first balance valve is arranged on the feeding oil path, and a control oil port of the first balance valve is connected with the backward oil path;
the second balance valve is arranged on the backward oil path, and a control oil port of the second balance valve is connected with the feeding oil path;
the control oil ports of the first balance valve and the second balance valve are connected with the reversing oil port of the rotary motor;
The first balance valve and the second balance valve comprise a one-way valve and a sequential valve which are connected in parallel;
When the forward rotation pressure of the rotary motor reaches the pressure set value of the anti-sticking valve, the forward rotation control oil of the rotary motor opens the sequence valve of the anti-sticking valve, and the hydraulic reversing valve of the anti-sticking valve is simultaneously reversed, so that the hydraulic cylinder is changed from a pushing state to a retreating state, the rotary motor continuously rotates forward, and the drilling tool discharges drill cuttings; when the forward rotation pressure of the rotary motor becomes lower than the pressure set value of the anti-sticking valve, the sequence valve spring of the anti-sticking valve is reset, and the hydraulic reversing valve of the anti-sticking valve is reversed again, so that the hydraulic cylinder is restored to a pushing state from a retreating state;
When the drill rod is unloaded by the drilling machine, the reversing valve is controlled to be in a middle position, and reversing control oil of the rotary motor opens sequence valves of the first balance valve and the second balance valve, so that oil paths of a feeding end and a retreating end of the hydraulic cylinder are communicated, and the hydraulic cylinder is in a floating state;
When the reversing valve is in the middle position and the rotary motor is not reversed, the check valves of the first balancing valve and the second balancing valve seal hydraulic oil in an oil way in the hydraulic cylinder and are used for preventing a power head of the drilling machine from falling when the drilling tool drills at an elevation angle or a depression angle.
Optionally, the reversing valve comprises a manual reversing valve, an electromagnetic reversing valve, an electrohydraulic reversing valve or a hydraulic reversing valve; when the reversing valve comprises a hydraulic reversing valve, the hydraulic reversing valve is a three-position four-way valve, the hydraulic system further comprises a pilot valve, and two control oil ports of the three-position four-way valve are connected with two working oil ports of the pilot valve; when the three-position four-way valve is in the middle position, two working oil ports A1 and A2 of the three-position four-way valve are communicated with an oil return port T; when the three-position four-way valve is in the front position, an oil inlet P of the three-position four-way valve is communicated with a working oil port A1, and a working oil port A2 is communicated with an oil return oil port T; when the three-position four-way valve is at the rear position, an oil inlet P of the three-position four-way valve is communicated with a working oil port A2, and a working oil port A1 is communicated with an oil return oil port T; and reset springs are arranged at two ends of the three-position four-way valve.
Optionally, the hydraulic reversing valve of the anti-sticking valve is a two-position four-way hydraulic reversing valve, when the two-position four-way hydraulic reversing valve is in a front position, an oil inlet B1 of the anti-sticking valve is communicated with a working oil port C1, and an oil inlet B2 of the anti-sticking valve is communicated with the working oil port C2; when the two-position four-way hydraulic reversing valve is at the rear position, an oil inlet B1 of the anti-sticking valve is communicated with a working oil port C2, and an oil inlet B2 of the anti-sticking valve is communicated with the working oil port C1; the front end of the valve core is provided with a reset spring, the rear end of the valve core is connected with an oil outlet of a sequence valve of the anti-sticking valve, an oil inlet of the sequence valve of the anti-sticking valve is connected with a control oil port of the anti-sticking valve, when the sequence valve of the anti-sticking valve is opened, the two-position four-way hydraulic reversing valve of the anti-sticking valve is replaced to the front position, and when the sequence valve of the anti-sticking valve is closed, the two-position four-way hydraulic reversing valve of the anti-sticking valve is reset to the rear position under the action of the reset spring.
Optionally, the sequence valve of the anti-sticking valve is provided with an adjusting hand wheel, and the pressure set value of the anti-sticking valve is adjusted through the adjusting hand wheel.
Optionally, the anti-sticking valve further comprises a pressure measuring port for monitoring pressure.
Optionally, a speed regulating valve is further arranged on the feeding oil path and used for regulating the propelling speed.
Optionally, when the reversing valve is at the rear position, the feeding oil way opens the sequence valve of the second balance valve, so that the backward oil way can smoothly return oil, and the feeding of the hydraulic cylinder is realized; when the reversing valve is in the front position, the reversing oil way opens the sequence valve of the first balance valve, so that the feeding oil way can smoothly return oil, and the hydraulic cylinder can be reversed.
Optionally, the anti-sticking valve, the first balancing valve, the second balancing valve, and the reversing valve are separate components.
Optionally, the anti-sticking valve, the first balancing valve, the second balancing valve, and the reversing valve are integrated.
In order to solve the technical problems, the invention also provides a drilling machine, which comprises the hydraulic system.
Advantageous effects
The invention provides a hydraulic system of a drilling machine and the drilling machine, wherein the hydraulic system comprises: the hydraulic cylinder, the anti-sticking drill valve, the reversing valve, the rotary motor, the first balance valve and the second balance valve;
an oil way between a backward oil port of the hydraulic cylinder and a first working oil port of the reversing valve is recorded as a backward oil way, and an oil way between a feeding oil port of the hydraulic cylinder and a second working oil port of the reversing valve is recorded as a feeding oil way;
The anti-sticking valve comprises a hydraulic reversing valve and a sequence valve connected with the hydraulic reversing valve, and two working oil ports of the anti-sticking valve are respectively arranged on a feed oil way and a backward oil way; two oil inlets of the anti-sticking drill valve are respectively arranged on the feed oil way and the backward oil way; the oil drain port of the anti-sticking drill valve is connected with an oil return tank; the control oil port of the anti-sticking valve is connected with the forward rotation oil port of the rotary motor;
the first balance valve is arranged on the feeding oil way, and a control oil port of the first balance valve is connected with the backward oil way;
the second balance valve is arranged on the backward oil path, and a control oil port of the second balance valve is connected with the feed oil path;
the control oil ports of the first balance valve and the second balance valve are connected with the reversing oil port of the rotary motor;
The first balance valve and the second balance valve comprise a one-way valve and a sequence valve which are connected in parallel;
When the forward rotation pressure of the rotary motor reaches the pressure set value of the anti-sticking valve, the forward rotation control oil of the rotary motor opens the sequence valve of the anti-sticking valve, and the hydraulic reversing valve of the anti-sticking valve reverses simultaneously, so that the hydraulic cylinder is changed from a pushing state to a retreating state, the rotary motor continuously rotates forward, and the drilling tool discharges drill cuttings, thereby preventing the problem of sticking; when the forward rotation pressure of the rotary motor becomes lower than the pressure set value of the anti-sticking valve, the sequence valve spring of the anti-sticking valve is reset, and the hydraulic reversing valve of the anti-sticking valve is reversed again, so that the hydraulic cylinder is restored to the pushing state from the retreating state;
When the drill rod is unloaded by the drilling machine, the reversing valve is controlled to be in the middle position, and the reversing control oil of the rotary motor opens the sequence valves of the first balance valve and the second balance valve, so that the oil paths of the feeding end and the retreating end of the hydraulic cylinder are communicated, the hydraulic cylinder is in a floating state, and the situation that the threads of the drill rod are damaged when the drill rod is dismounted is effectively avoided;
When the reversing valve is in the middle position and the rotary motor is not reversed, the check valves of the first balance valve and the second balance valve seal hydraulic oil in the oil way in the hydraulic cylinder, and the check valves are used for preventing the power head of the drilling machine from falling when the drilling tool drills in the elevation angle or the depression angle.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained as well for those skilled in the art without inventive effort.
Fig. 1 is a schematic diagram of a drill rod (external thread) inverted out of a drill rod (internal thread) according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a hydraulic system of a drilling rig according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an oil path when implementing a forward function according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an oil circuit when implementing a backward function according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an oil circuit when implementing a floating function according to an embodiment of the present invention;
Fig. 6 is a schematic diagram of an oil path when the anti-falling function is implemented according to the embodiment of the present invention;
Reference numerals and components referred to in the drawings are as follows:
1. hydraulic cylinder 2. Anti-sticking drilling valve
21. Two-position four-way hydraulic reversing valve 22: sequence valve of anti-sticking drill valve 2
221: Regulating hand wheel 3. Reversing valve
31. Return spring 4. Rotating motor
5. Pilot valve 6. Oil tank
7. Speed valve 8. First balance valve
81. Check valve 82 of the first balancing valve 8. Sequence valve of the first balancing valve 8
9. Second balance valve P, three-position four-way hydraulic reversing valve oil inlet T, three
Oil return port of four-way hydraulic reversing valve
L, oil drain port G of anti-sticking drill valve 2. Pressure measuring port of anti-sticking drill valve 2
A1. first working oil port of three-position four-way hydraulic reversing valve
A2. Second working oil port of three-position four-way hydraulic reversing valve
B1. first oil inlet of anti-sticking drill valve 2
B2. second oil inlet C1 of anti-sticking drill valve 2. First working oil port of anti-sticking drill valve 2
C2. second working oil port D1 of anti-sticking drilling valve 2. Backward oil port of hydraulic cylinder 1
D2. feed oil port E1 of hydraulic cylinder 1. Forward rotation oil port of rotation motor 4
E2. Reverse oil port F1 of rotary motor 4. Oil inlet of first balance valve
F2. Balance valve oil outlet H1 of first balance valve, oil inlet of second balance valve
H2. First working oil port of oil outlet a1. pilot valve 5 of second balance valve
A2. Second working oil port of pilot valve 5
B1. first control oil port of three-position four-way hydraulic reversing valve
B2. Second control oil port p1. of three-position four-way hydraulic reversing valve is prevented blocking control oil port of drilling valve 2
P2. inlet t2 of pilot valve 5 return port of pilot valve 5
P3. control ports of the first balance valve 8 and the second balance valve 9.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order to solve the problem that a hydraulic drilling machine in the existing design often has a drill sticking problem in the drilling process, and damage drill rod threads when disassembling a drill rod, and a power head stalls and falls when drilling in an elevation angle or a depression angle, the embodiment provides a hydraulic system of the drilling machine, referring to fig. 2, fig. 2 is a schematic diagram of the hydraulic system of the drilling machine, where the hydraulic system of the drilling machine includes:
The hydraulic cylinder 1, the anti-sticking drill valve 2, the reversing valve 3, the rotary motor 4, the first balance valve 8 and the second balance valve 9;
The oil path between the backward oil port D1 of the hydraulic cylinder 1 and the first working oil port A1 of the reversing valve 3 is denoted as backward oil path (i.e., between A1 and D1), and the oil path between the feed oil port D2 of the hydraulic cylinder 1 and the second working oil port A2 of the reversing valve 3 is denoted as feed oil path (i.e., between A2 and D2);
The anti-sticking valve 2 comprises a hydraulic reversing valve 21 and a sequence valve 22 connected with the hydraulic reversing valve 21, and two working oil ports C1 and C2 of the anti-sticking valve 2 are respectively arranged on a feed oil way and a backward oil way; the two oil inlets B1 and B2 of the anti-sticking drill valve 2 are respectively arranged on the feeding oil way and the retreating oil way; the oil drain port L of the anti-sticking drilling valve 2 is used as an oil outlet for leaked oil, the general movement part of the hydraulic system is sealed by a clearance, leakage is not avoided, the leaked oil can play a role in lubrication, and the oil drain port L is required to be connected with the oil return box 6; the control oil port p1 of the anti-sticking valve 2 is connected with the forward rotation oil port E1 of the rotary motor 4;
the first balance valve 8 is arranged on the feeding oil path, and a control oil port p3 of the first balance valve 8 is connected with the backward oil path;
The second balance valve 9 is arranged on the backward oil path, and a control oil port p3 of the second balance valve 9 is connected with the feed oil path;
the control oil ports p3 of the first balance valve 8 and the second balance valve 9 are connected with the reversing oil port E2 of the rotary motor 4;
the first balance valve 8 and the second balance valve 9 comprise a one-way valve and a sequential valve which are connected in parallel;
From the figure, the first balance valve 8 and the second balance valve 9 may be disposed not only above the anti-sticking valve 2 but also below the anti-sticking valve 2 as in fig. 2;
In fig. 2, the first balance valve 8 is composed of a check valve 81, a sequence valve 82, a control oil port p3, an oil inlet F1 and an oil outlet F2; the second balance valve 9 consists of a one-way valve, a sequence valve, a control oil port p3, an oil inlet H1 and an oil outlet H2; the oil inlet F1 of the first balance valve 8 is connected with the second working oil port A2 of the reversing valve 3, the oil outlet F2 of the first balance valve 8 is connected with the second oil inlet B2 of the anti-sticking valve 2, and the control oil port p3 of the first balance valve 8 is respectively connected with a backward oil path (any position between A1 and D1) and a reverse oil path;
the oil inlet H1 of the second balance valve 9 is connected with the first working oil port A1 of the reversing valve 3, the oil outlet H2 of the second balance valve 9 is connected with the first oil inlet B1 of the anti-sticking valve 2, and the control oil port p3 of the second balance valve 9 is respectively connected with the feed oil path (any position between A2 and D2) and the reversing oil path.
Referring to fig. 3, fig. 3 is a schematic diagram of an oil path when the forward function is implemented based on the hydraulic system of fig. 2, in fig. 3, the thicker line is the oil return, and the thinner line is the oil inlet.
Referring to fig. 4, fig. 4 is a schematic diagram of an oil path for implementing a backward function based on the hydraulic system of fig. 2, in fig. 4, the line is thicker for oil intake, and the line is thinner for oil return.
In the prior art, drill cuttings in a drilled hole are held tightly by a drilling tool, the forward rotation pressure of a rotary motor 4 rises sharply, and the drill is blocked when the highest pressure of the system cannot be drilled; in the embodiment, when the forward rotation pressure of the rotary motor 4 reaches the pressure set value of the anti-sticking valve 2, the forward rotation control oil of the rotary motor 4 opens the sequence valve 22 of the anti-sticking valve 2, and the hydraulic reversing valve 21 of the anti-sticking valve 2 reverses simultaneously, so that the hydraulic cylinder 1 changes from a pushing state to a retreating state, the rotary motor 4 continuously rotates forward, and the drilling tool discharges drill cuttings, thereby preventing the problem of sticking; when the forward rotation pressure of the rotary motor 4 becomes lower than the pressure set value of the anti-sticking valve 2, the sequence valve 22 of the anti-sticking valve 2 is spring-reset, and the hydraulic reversing valve 21 of the anti-sticking valve 2 is reversed again, so that the hydraulic cylinder 1 is restored to the pushing state from the retreating state; the state that forward rotation and backward rotation are carried out together is called a hole milling state, and holes are drilled and milled under complex working conditions (soft coal beds and the like), so that continuous drilling is ensured.
In the prior art, when a drilling machine dismantles a drilling rod, a drilling machine chuck and a clamp holder respectively clamp two drilling rods, as shown in fig. 1, the drilling rods (external threads) are reversed, the lengths of the two drilling rods are increased after the threads are unscrewed, and if the distance between the chuck and the clamp holder is kept unchanged, the threads of the drilling rods are damaged; in this embodiment, when the drill rod is unloaded from the drilling machine, the reversing valve 3 is controlled to be in the middle position, and the reversing control oil of the rotary motor 4 opens the sequence valves of the first balance valve 8 and the second balance valve 9, so that the oil paths of the feeding end and the retreating end of the hydraulic cylinder 1 are communicated, the hydraulic cylinder 1 is in a floating state, and the situation that the threads of the drill rod are damaged when the drill rod is dismounted is effectively avoided. Referring to fig. 5, fig. 5 is a schematic diagram of an oil path when the floating function is implemented based on the hydraulic system of fig. 2, in fig. 5, the oil path is communicated at the reversing valve 3 when the floating function is implemented, and the reverse oil path of the rotary motor 4 is thinner.
When the reversing valve 3 is in the middle position (i.e. the feeding end and the retreating end of the hydraulic cylinder 1 are not supplied with oil) and the rotary motor 4 is not reversed, the check valves of the first balance valve 8 and the second balance valve 9 seal the hydraulic oil in the oil path in the hydraulic cylinder and are used for preventing the power head of the drilling machine from falling when the drilling tool drills at the elevation angle or the depression angle. By sealing the oil in the cavity of the hydraulic cylinder, the oil cannot flow out, so that the anti-falling function is realized; the anti-falling function is that the reversing valve 3 is in the neutral position and the rotary motor 4 is not operated in the reverse rotation condition, namely the conditions of no propulsion, no reverse rotation and no reverse rotation. The feed and reverse end communication of the hydraulic cylinder 1 only occurs when the reversing oil passage is pressurized, and once the reversing stop sequence valve is naturally closed, the hydraulic cylinder 1 can not float any more. Referring to fig. 6, fig. 6 is a schematic view of an oil path when the anti-falling function is implemented based on the hydraulic system of fig. 2, and in fig. 6, oil in two cavities of the hydraulic cylinder 1 is locked in the cavities.
Alternatively, in the present embodiment, the reversing valve 3 includes a manual reversing valve, or an electromagnetic reversing valve, or an electrohydraulic reversing valve, or a hydraulic reversing valve;
When the reversing valve 3 is a hydraulic reversing valve, the hydraulic reversing valve is a three-position four-way valve, and the hydraulic system further comprises a pilot valve 5, and two control oil ports b1 and b2 of the three-position four-way valve are connected with two working oil ports a1 and a2 of the pilot valve 5; when the three-position four-way valve is in the middle position, two working oil ports A1 and A2 of the three-position four-way valve are communicated with an oil return port T; when the three-position four-way valve is in the front position, an oil inlet P of the three-position four-way valve is communicated with a working oil port A1, and a working oil port A2 is communicated with an oil return oil port T; when the three-position four-way valve is at the rear position, an oil inlet P of the three-position four-way valve is communicated with a working oil port A2, and a working oil port A1 is communicated with an oil return oil port T; reset springs 31 are arranged at two ends of the three-position four-way valve; when the pilot valve 5 is operated to control the three-position four-way valve, oil can flow from a1 to b1 during operation of the pilot valve 5, the valve core of the three-position four-way valve is pushed to the right (only explained from the figure, the three-position four-way valve is in the front position), and similarly, oil can flow from a2 to b2 (the three-position four-way valve is in the rear position), and when oil is not present, the springs 31 at the two ends of the three-position four-way valve push the valve core back to the middle position. The pilot valve 5 further comprises an oil inlet p2 and an oil return port t2.
Optionally, in this embodiment, the hydraulic reversing valve 21 of the anti-sticking valve 2 is a two-position four-way hydraulic reversing valve 21, and when the two-position four-way hydraulic reversing valve 21 is in the front position, the oil inlet B1 of the anti-sticking valve 2 is communicated with the working oil port C1, and the oil inlet B2 of the anti-sticking valve 2 is communicated with the working oil port C2; when the two-position four-way hydraulic reversing valve 21 is at the rear position, an oil inlet B1 of the anti-sticking valve 2 is communicated with the working oil port C2, and an oil inlet B2 of the anti-sticking valve 2 is communicated with the working oil port C1; the front end of the valve core is provided with a reset spring, the rear end of the valve core is connected with an oil outlet of a sequence valve 22 of the anti-sticking valve 2, an oil inlet of the sequence valve 22 of the anti-sticking valve 2 is connected with a control oil port p1 of the anti-sticking valve 2, when the sequence valve 22 of the anti-sticking valve 2 is opened, the two-position four-way hydraulic reversing valve 21 of the anti-sticking valve 2 is replaced to the front position, and when the sequence valve 22 of the anti-sticking valve 2 is closed, the two-position four-way hydraulic reversing valve 21 of the anti-sticking valve 2 is reset to the rear position under the action of the reset spring. The sequence valve 22 of the anti-sticking valve 2 can be a two-position two-way sequence valve.
Alternatively, the hydraulic directional valve of the anti-sticking valve 2 may also employ a three-position valve, where one position is inactive, or the third position is used for other functions, such as pressure measurement, etc.
Alternatively, in the present embodiment, the sequence valve 22 of the anti-sticking valve 2 is provided with an adjusting hand wheel 221, and the pressure setting value of the anti-sticking valve 2 is adjusted by the adjusting hand wheel 221; that is, the sequence valve 22 is adjustable, and is provided with an adjusting hand wheel 221, and the opening pressure is adjustable.
Optionally, in this embodiment, the anti-sticking valve 2 further comprises a pressure measurement port G for monitoring the pressure thereat. The pressure gauge can be used for measuring, and the pressure at the position can be monitored at any time, namely the drilling working condition is monitored.
Optionally, in this embodiment, the feed oil path is further provided with a speed regulating valve 7 for regulating the propulsion speed.
Optionally, in this embodiment, when the reversing valve 3 is in the rear position, the feeding oil path opens the sequence valve of the second balance valve 9, so that the backward oil path can smoothly return oil, and the feeding of the hydraulic cylinder 1 is realized; when the reversing valve 3 is in the front position, the reversing oil way opens the sequence valve of the first balance valve 8, so that the feeding oil way can smoothly return oil, and the hydraulic cylinder 1 can be reversed.
Alternatively, in the present embodiment, the anti-sticking valve 2, the first balance valve 8, the second balance valve 9, and the reversing valve 3 are separate components.
Alternatively, in the present embodiment, the anti-sticking valve 2, the first balance valve 8, the second balance valve 9, and the reversing valve 3 are integrated.
In order to solve the technical problems, the invention also provides a drilling machine, which comprises the hydraulic system of any one of the above.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and additions to the present invention may be made by those skilled in the art without departing from the principles of the present invention and such modifications and additions are to be considered as well as within the scope of the present invention.
Claims (10)
1. A hydraulic system for a drilling rig, comprising: the hydraulic cylinder, the anti-sticking drill valve, the reversing valve, the rotary motor, the first balance valve and the second balance valve;
an oil way between a backward oil port of the hydraulic cylinder and a first working oil port of the reversing valve is marked as a backward oil way, and an oil way between a feeding oil port of the hydraulic cylinder and a second working oil port of the reversing valve is marked as a feeding oil way;
The anti-sticking drill valve comprises a hydraulic reversing valve and a sequence valve connected with the hydraulic reversing valve, and two working oil ports of the anti-sticking drill valve are respectively arranged on the feeding oil way and the retreating oil way; two oil inlets of the anti-sticking drill valve are respectively arranged on the feeding oil way and the retreating oil way; the oil drain port of the anti-sticking drill valve is connected with an oil return tank; the control oil port of the anti-sticking valve is connected with the forward rotation oil port of the rotary motor;
the first balance valve is arranged on the feeding oil path, and a control oil port of the first balance valve is connected with the backward oil path ;
The second balance valve is arranged on the backward oil path, and a control oil port of the second balance valve is connected with the feeding oil path;
the control oil ports of the first balance valve and the second balance valve are connected with the reversing oil port of the rotary motor;
The first balance valve and the second balance valve comprise a one-way valve and a sequential valve which are connected in parallel;
When the forward rotation pressure of the rotary motor reaches the pressure set value of the anti-sticking valve, the forward rotation control oil of the rotary motor opens the sequence valve of the anti-sticking valve, and the hydraulic reversing valve of the anti-sticking valve is simultaneously reversed, so that the hydraulic cylinder is changed from a pushing state to a retreating state, the rotary motor continuously rotates forward, and the drilling tool discharges drill cuttings; when the forward rotation pressure of the rotary motor becomes lower than the pressure set value of the anti-sticking valve, the sequence valve spring of the anti-sticking valve is reset, and the hydraulic reversing valve of the anti-sticking valve is reversed again, so that the hydraulic cylinder is restored to a pushing state from a retreating state;
When the drill rod is unloaded by the drilling machine, the reversing valve is controlled to be in a middle position, and reversing control oil of the rotary motor opens sequence valves of the first balance valve and the second balance valve, so that oil paths of a feeding end and a retreating end of the hydraulic cylinder are communicated, and the hydraulic cylinder is in a floating state;
When the reversing valve is in the middle position and the rotary motor is not reversed, the check valves of the first balancing valve and the second balancing valve seal hydraulic oil in an oil way in the hydraulic cylinder and are used for preventing a power head of the drilling machine from falling when the drilling tool drills at an elevation angle or a depression angle.
2. The hydraulic system of claim 1, wherein the reversing valve comprises a manual reversing valve, or an electromagnetic reversing valve, or an electro-hydraulic reversing valve, or a hydraulic reversing valve; when the reversing valve comprises a hydraulic reversing valve, the hydraulic reversing valve is a three-position four-way valve, the hydraulic system further comprises a pilot valve, and two control oil ports of the three-position four-way valve are connected with two working oil ports of the pilot valve; when the three-position four-way valve is in the middle position, two working oil ports A1 and A2 of the three-position four-way valve are communicated with an oil return port T; when the three-position four-way valve is in the front position, an oil inlet P of the three-position four-way valve is communicated with a working oil port A1, and a working oil port A2 is communicated with an oil return oil port T; when the three-position four-way valve is at the rear position, an oil inlet P of the three-position four-way valve is communicated with a working oil port A2, and a working oil port A1 is communicated with an oil return oil port T; and reset springs are arranged at two ends of the three-position four-way valve.
3. The hydraulic system of claim 1, wherein the hydraulic directional control valve of the anti-sticking valve is a two-position four-way hydraulic directional control valve, and when the two-position four-way hydraulic directional control valve is in a front position, an oil inlet B1 of the anti-sticking valve is communicated with a working oil port C1, and an oil inlet B2 of the anti-sticking valve is communicated with the working oil port C2; when the two-position four-way hydraulic reversing valve is at the rear position, an oil inlet B1 of the anti-sticking valve is communicated with a working oil port C2, and an oil inlet B2 of the anti-sticking valve is communicated with the working oil port C1; the front end of the valve core is provided with a reset spring, the rear end of the valve core is connected with an oil outlet of a sequence valve of the anti-sticking valve, an oil inlet of the sequence valve of the anti-sticking valve is connected with a control oil port of the anti-sticking valve, when the sequence valve of the anti-sticking valve is opened, the two-position four-way hydraulic reversing valve of the anti-sticking valve is replaced to the front position, and when the sequence valve of the anti-sticking valve is closed, the two-position four-way hydraulic reversing valve of the anti-sticking valve is reset to the rear position under the action of the reset spring.
4. A hydraulic system according to claim 3, wherein the sequence valve of the anti-sticking valve is provided with an adjusting handwheel by means of which the pressure setting value of the anti-sticking valve is adjusted.
5. The hydraulic system of claim 1, wherein the anti-sticking valve further comprises a pressure tap for monitoring pressure.
6. The hydraulic system of claim 1, wherein the feed oil passage is further provided with a speed control valve for adjusting the propulsion speed.
7. The hydraulic system according to any one of claims 1 to 6, wherein when the reversing valve is in the rear position, the feed oil passage opens the sequence valve of the second balance valve, so that the return oil passage can smoothly return oil, and the hydraulic cylinder feed is realized; when the reversing valve is in the front position, the reversing oil way opens the sequence valve of the first balance valve, so that the feeding oil way can smoothly return oil, and the hydraulic cylinder can be reversed.
8. The hydraulic system of any one of claims 1-6, wherein the anti-sticking valve, the first balancing valve, the second balancing valve, and the reversing valve are separate components.
9. The hydraulic system of any one of claims 1-6, wherein the anti-sticking valve, the first balancing valve, the second balancing valve, and the reversing valve are integrated.
10. A drilling machine comprising a hydraulic system according to any one of claims 1 to 9.
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| CN201910260267.7A CN109944835B (en) | 2019-04-02 | 2019-04-02 | Hydraulic system of drilling machine and drilling machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110469552A (en) * | 2019-09-17 | 2019-11-19 | 重庆平山矿山机电设备有限公司 | A kind of hydraulic system and drilling machine |
| CN112832736B (en) * | 2019-11-23 | 2023-07-14 | 山东科技大学 | Automatic anti-sticking bores hydraulic coal mine drilling machine |
| CN112623643B (en) * | 2021-01-26 | 2021-08-24 | 中国矿业大学 | Tensioning system of belt conveyor |
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