CN112943718A - Multi-stage pressure regulating system and method with logic valve as pressure reducing valve - Google Patents
Multi-stage pressure regulating system and method with logic valve as pressure reducing valve Download PDFInfo
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- CN112943718A CN112943718A CN202110302850.7A CN202110302850A CN112943718A CN 112943718 A CN112943718 A CN 112943718A CN 202110302850 A CN202110302850 A CN 202110302850A CN 112943718 A CN112943718 A CN 112943718A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/023—Excess flow valves, e.g. for locking cylinders in case of hose burst
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/025—Pressure reducing valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention relates to a multi-stage pressure regulating system and method with a logic valve as a pressure reducing valve. It has solved current design technical problem such as reasonable inadequately. The remote control hydraulic control system comprises a propulsion motor, wherein one end of the propulsion motor is connected with a hydraulic control reversing valve through a logic valve, the hydraulic control reversing valve is connected with a pressure oil source end and a control oil source end respectively, the other end of the propulsion motor is directly connected with the hydraulic control reversing valve, the propulsion motor and the logic valve are communicated with each other through a one-way valve, the logic valve is communicated with a high-low pressure valve through an electromagnetic valve, one end of the high-low pressure valve is connected with a superposition type overflow valve, and the other end of the high-low pressure valve is connected with a remote. Has the advantages that: the main oil way is simple, and when the installation space is compact, the space utilization can be well improved; compared with a system with a plurality of main valves, the system has the advantages of obvious cost advantage, reduced pressure loss and flow loss, high logic valve precision, good stability and reliability and longer service life.
Description
Technical Field
The invention belongs to the technical field of engineering equipment, and particularly relates to a multi-stage pressure regulating system and method with a logic valve as a pressure reducing valve.
Background
In the rock drilling machine, along with the continuous lifting of the application, the requirement of multistage pressure control on the propelling action is more and more, the drill rod replacing propelling pressure and the rock drilling propelling pressure are different, and the propelling action is obtained by adopting a scheme that a pressure reducing valve is connected in series or an overflow valve is connected in parallel or in series and is converted through a reversing valve at present, so that the pressure reducing valve is applied to pressure setting control of actuating mechanisms in various hydraulic equipment, the oil inlet pressure of actuating components such as a hydraulic motor, an oil cylinder and the like is controlled, and the control of the output force of the corresponding function of the equipment is. In rock drilling machines, a direct-acting valve or a pilot-operated pressure reducing valve is usually used to control the propulsion pressure, so as to meet the pressure control requirements. However, the serial connection and the parallel connection of the valve elements can only be carried out in the main system, so that the pressure and flow loss of the system are large, the valve elements are all actuating mechanism pipelines which are thick, the pipeline connection is complex due to the serial connection and the parallel connection, the requirement on installation space is large, and meanwhile, the parameter performance of each element connected in series and in parallel is required to be high so as to ensure accurate control, so that the cost is indirectly increased, and the requirements for the parameter performance are inconvenient to change. Therefore, it is very important to develop a control method of a pressure reducing valve capable of realizing multi-stage pressure control of one valve.
Disclosure of Invention
The invention aims to solve the problems and provides a multi-stage pressure regulating system taking a logic valve as a pressure reducing valve, which has the advantages of reasonable design, complex propelling pipeline and large occupied space.
Another object of the present invention is to solve the above problems and to provide a multi-stage pressure regulating method using a logic valve as a pressure reducing valve, which is easy to implement and highly automated.
In order to achieve the purpose, the invention adopts the following technical scheme: this logic valve is as multistage pressure regulating system of relief pressure valve, including propulsion motor, its characterized in that, propulsion motor one end link to each other through logic valve and hydraulic control switching-over valve, just hydraulic control switching-over valve link to each other with pressure oil source end and control oil source end respectively, the propulsion motor other end directly link to each other with hydraulic control switching-over valve, propulsion motor and logic valve between and logic valve and hydraulic control switching-over valve between be linked together through the check valve, the logic valve pass through the solenoid valve and link to each other with high low pressure valve, just high low pressure valve one end and stack formula overflow valve link to each other, the other end and remote air-vent valve link to each other.
The invention solves the problems of complex propelling pipeline and large occupied space of the original rock drilling machine, reduces the problem of pressure loss and flow loss of the system caused by the serial and parallel connection of a plurality of main valve parts, reduces the valve, reduces the cost and realizes the indirect concentration and beautification of the system. The logic valve is used for multi-stage pressure regulation of the pressure reducing valve, 1 large-flow logic valve is adopted to replace a plurality of large-flow pressure reducing valves, a small-flow overflow valve is matched to pass through a pilot control oil way of a conversion logic valve of an electromagnetic valve or a hydraulic control reversing valve, various pressure control is realized, a main valve is adopted in the whole configuration, the original series connection and parallel connection pipelines of the main pipeline are removed, the pressure and flow losses caused by series connection and parallel connection of the main pipeline are greatly reduced, and the system structure is simpler; the main valve ensures that the pressure regulation is more stable and uniform, and the remote multi-stage pressure control is better realized.
In the multi-stage pressure regulating system with the logic valve as the pressure reducing valve, the logic valve is a multi-way valve.
In the multi-stage pressure regulating system with the logic valve as the pressure reducing valve, a pressure gauge is connected between the propulsion motor and the logic valve.
In the multi-stage pressure regulating system with the logic valve as the pressure reducing valve, the control oil source end is connected with the hydraulic control reversing valve through a control pressure pipeline, and the pressure oil source end is connected with the hydraulic control reversing valve through a high-pressure pipeline.
In the multi-stage pressure regulating system with the logic valve as the pressure reducing valve, the logic valve is connected with the A end of the propulsion motor through a high-pressure pipeline; and the end B of the propulsion motor is connected with a hydraulic control reversing valve through an oil return pipeline.
The logic valve of the multi-stage pressure regulating system in which the logic valve is a pressure reducing valve is a multi-stage pressure regulating method of a pressure reducing valve as described above is as follows: the logic valve is used as a multi-stage pressure regulating method of a pressure reducing valve, and comprises the following steps:
A. when the control oil source end supplies oil to the hydraulic control port of the hydraulic control reversing valve, the pressure oil source of the pressure oil source end enters the inlet of the logic valve, the outlet supplies oil to the propulsion motor, the propulsion motor rotates forwards, meanwhile, pressure regulating control oil of the logic valve enters the superposed overflow valve through the electromagnetic valve and the high-low pressure valve and reaches the remote pressure regulating valve, the outlet pressure of the logic valve is regulated through the remote pressure regulating valve, and the control of the driving pressure of the propulsion motor is achieved.
In the multi-stage pressure regulating method using the logic valve as the pressure reducing valve, when the fast-forwarding work is carried out, the electromagnetic valve cuts off the logic valve to control the oil source oil way, the outlet pressure of the logic valve is the inlet pressure, and the high-flow high-pressure fast rotation of the propulsion motor is realized.
In the multi-stage pressure regulating method with the logic valve as the pressure reducing valve, when the drill rod is changed, the high-pressure valve and the low-pressure valve are communicated, the control oil path of the logic valve is communicated with the low-pressure regulating valve of the superposed overflow valve, and the outlet pressure of the logic valve is a low-pressure set value, so that the low-pressure work of the propulsion motor is realized.
In the multi-stage pressure regulating method using the logic valve as the pressure reducing valve, when the rock drilling process is carried out, the electromagnetic valve and the high-low pressure valve are not communicated, the control oil path of the logic valve reaches the remote pressure regulating valve, and an operator realizes real-time control of the propelling pressure by regulating the remote pressure regulating valve on a cab or an operation table according to needs.
Compared with the prior art, the invention has the advantages that: in the whole control system, the logic valve is a main oil path pressure control pressure reducing valve of the propulsion motor, the logic valve is matched with the electromagnetic valve and the electromagnetic valve to convert a control oil path of the propulsion motor, and the logic valve is respectively connected with the superposed overflow valve and the remote pressure regulating valve to realize a three-stage pressure regulating control function; compared with a system with a plurality of main valves, the system has the advantages of obvious cost advantage, reduced pressure loss and flow loss of the system, high logic valve precision, good stability and reliability and longer service life.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a hydraulic schematic of the present invention;
FIG. 3 is a hydraulic implementation of the present invention;
in the figure, a hydraulic control reversing valve 1, a pressure oil source end 11, a control oil source end 12, a control pressure pipeline 13, a high-pressure pipeline 14, an oil return pipeline 15, a logic valve 2, a one-way valve 3, an electromagnetic valve 4, a superposition type overflow valve 5, a remote pressure regulating valve 6, a high-low pressure valve 7, a pressure gauge 8 and a propulsion motor 9.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in figures 1-3, the logic valve is used as a multi-stage pressure regulating system of a pressure reducing valve and comprises a propulsion motor 9, wherein one end of the propulsion motor 9 is connected with a hydraulic control reversing valve 1 through a logic valve 2, preferably, the logic valve 2 is a multi-way valve, and a pressure gauge 8 is connected between the propulsion motor 9 and the logic valve 2. The hydraulic control reversing valve 1 is respectively connected with a pressure oil source end 11 and a control oil source end 12, the other end of the propulsion motor 9 is directly connected with the hydraulic control reversing valve 1, the propulsion motor 9 and the logic valve 2 are communicated with each other, the logic valve 2 and the hydraulic control reversing valve 1 are communicated with each other through the check valve 3, the logic valve 2 is connected with the high-low pressure valve 7 through the electromagnetic valve 4, one end of the high-low pressure valve 7 is connected with the overlapped overflow valve 5, and the other end of the high-low pressure valve is connected with the remote pressure regulating valve. The hydraulic control reversing valve 1 is used for controlling forward and reverse rotation of the propulsion motor 9, the logic valve 2 is used for controlling forward rotation pressure of the propulsion motor 9, reverse oil return is realized through the one-way valve 3, and the electromagnetic valve 4 is used for rapid propulsion conversion; the superposition overflow valve 5 is a high-low propelling pressure setting valve, and the remote pressure regulating valve 6 is used for regulating propelling pressure; the electromagnetic valve 7 is a high-low propulsion pressure conversion valve, and the pressure gauge 8 is used for displaying the propulsion pressure.
The invention solves the problems of complex propelling pipeline and large occupied space of the original rock drilling machine, reduces the problem of pressure loss and flow loss of the system caused by the serial and parallel connection of a plurality of main valve parts, reduces the valve, reduces the cost and realizes the indirect concentration and beautification of the system. The logic valve is used for multi-stage pressure regulation of the pressure reducing valve, 1 large-flow logic valve is adopted to replace a plurality of large-flow pressure reducing valves, a small-flow overflow valve is matched to pass through a pilot control oil way of a conversion logic valve of an electromagnetic valve or a hydraulic control reversing valve, various pressure control is realized, a main valve is adopted in the whole configuration, the original series connection and parallel connection pipelines of the main pipeline are removed, the pressure and flow losses caused by series connection and parallel connection of the main pipeline are greatly reduced, and the system structure is simpler; the main valve ensures that the pressure regulation is more stable and uniform, and the remote multi-stage pressure control is better realized.
Further, here, the control oil source end 12 is connected to the pilot operated directional control valve 1 through a control pressure line 13, and the pressure oil source end 11 is connected to the pilot operated directional control valve 1 through a high pressure line 14.
Furthermore, the logic valve 2 is connected with the A end of the propulsion motor 9 through a high-pressure pipeline 14; the B end of the propulsion motor 9 is connected with the hydraulic control reversing valve 1 through an oil return pipeline 15.
The multi-stage pressure regulating method of the logic valve as the pressure reducing valve in the embodiment comprises the following steps:
when the control oil source end 12 supplies oil to the hydraulic control port of the hydraulic control reversing valve 1, the pressure oil source of the pressure oil source end 11 enters the inlet of the logic valve 2, the outlet supplies oil to the propulsion motor 9, the propulsion motor 9 rotates forwards, meanwhile, the pressure regulating control oil of the logic valve 2 enters the superposed overflow valve 5 through the electromagnetic valve 4 and the high-low pressure valve 7 to reach the remote pressure regulating valve 6, the outlet pressure of the logic valve 2 is regulated through the remote pressure regulating valve 6, and the control of the driving pressure of the propulsion motor 9 is realized.
When fast-forward operation is carried out, the electromagnetic valve 4 cuts off the logic valve 2 to control the oil source oil way, the outlet pressure of the logic valve 2 is inlet pressure, and high-flow high-pressure fast rotation of the propulsion motor 9 is realized.
When the drill rod is changed, the high-low pressure valve 7 is communicated, the control oil path of the logic valve 2 is communicated with the low pressure regulating valve of the superposition type overflow valve 5, the outlet pressure of the logic valve 2 is a low pressure set value, and the low pressure work of the propulsion motor 9 is realized.
When the rock drilling process is carried out, the electromagnetic valve 4 and the high-low pressure valve 7 are not communicated, the control oil path of the logic valve 2 reaches the remote pressure regulating valve 6, and an operator can realize the real-time control of the propelling pressure by regulating the remote pressure regulating valve 6 on a cab or an operation table according to the requirement.
In the whole control system, the logic valve 2 is a main oil path pressure control pressure reducing valve of a propulsion motor 9, a control oil path of the logic valve is converted by matching with the electromagnetic valve 4 and the electromagnetic valve 7, and the control oil path is respectively connected to the superposed overflow valve 5 and the remote pressure regulating valve 6 to realize a three-stage pressure regulating control function, the main oil path is simple, the control oil path can be increased or reduced according to requirements, the control system is convenient and flexible, and when the installation space is compact, the space utilization can be well promoted; compared with a system with a plurality of main valves, the system has the advantages of obvious cost advantage, reduced pressure loss and flow loss of the system, high logic valve precision, good stability and reliability and longer service life.
When the external pilot oil source supplies oil, when the control handle is operated alone to push forwards, the oil inlet and return of the logic valve 2 are controlled, and the propulsion motor 9 is driven to operate by the pressure oil source of the pressure oil source end 11; when the hydraulic control handle is operated independently to move left and right, the oil inlet and return of the logic valve 2 are controlled to drive the rotary motor to operate.
When normally drilling, impel, gyration simultaneous working, because the flow that impels the needs is less, pressure oil source end 11, control oil source end 12 confluence supply gyration this moment, gyration oil flow increase one time, single chip valve control gyration will produce the oil return backpressure at double because the discharge capacity restriction of valve, is that this system is in high pressure oil return state, and high temperature will appear in long-term use, and the effective operating pressure differential of motor reduces moreover, causes equipment output to reduce, forms extravagantly. This embodiment is direct increases the oily flow capacity of passing of gyration oil circuit by times, solves above-mentioned high back pressure, the system generates heat big, output is not enough scheduling problem, makes the operation of motor be in low back pressure operating mode simultaneously, when promoting power, promotes availability factor and motor life. The reversing valve increases the flow capacity, effectively realizes the increase of the flow capacity cost of the small reversing valve, solves the application limitation of small flow of the small valve, improves the universality and interchangeability of parts of the multi-way valve of the rock drilling equipment, avoids the defect of large requirement on the installation size of the large reversing valve, reduces the use cost, and is convenient and flexible.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although the terms of the pilot-operated directional valve 1, the pressure oil source end 11, the control oil source end 12, the control pressure line 13, the high-pressure line 14, the return line 15, the logic valve 2, the check valve 3, the solenoid valve 4, the superposition overflow valve 5, the remote pressure-regulating valve 6, the high-low pressure valve 7, the pressure gauge 8, the propulsion motor 9, etc., are used more frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (9)
1. The utility model provides a logic valve is as multistage pressure regulating system of relief pressure valve, includes propulsion motor (9), its characterized in that, propulsion motor (9) one end link to each other through logic valve (2) and pilot operated directional control valve (1), just pilot operated directional control valve (1) link to each other with pressure oil source end (11) and control oil source end (12) respectively, propulsion motor (9) other end directly link to each other with pilot operated directional control valve (1), propulsion motor (9) and logic valve (2) between and logic valve (2) and pilot operated directional control valve (1) between be linked together through check valve (3), logic valve (2) link to each other through solenoid valve (4) and high-low pressure valve (7), just high-low pressure valve (7) one end and stack formula overflow valve (5) link to each other, the other end and remote air-vent valve (6) link to each other.
2. The multi-stage pressure regulating system of a logic valve as a pressure reducing valve according to claim 1, characterized in that the logic valve (2) is a multiplex valve.
3. The system for the multi-stage regulation of the pressure of a logic valve as a pressure relief valve according to claim 2, characterized in that a pressure gauge (8) is connected between the propulsion motor (9) and the logic valve (2).
4. A multi-stage pressure regulating system of a logic valve as a pressure reducing valve according to claim 1, 2 or 3, wherein the control oil source terminal (12) is connected to the pilot operated directional control valve (1) through a control pressure line (13), and the pressure oil source terminal (11) is connected to the pilot operated directional control valve (1) through a high pressure line (14).
5. The multi-stage pressure regulating system of a logic valve as a pressure reducing valve according to claim 4, characterized in that the logic valve (2) is connected with the A end of the propulsion motor (9) through a high-pressure pipeline (14); and the end B of the propulsion motor (9) is connected with the hydraulic control reversing valve (1) through an oil return pipeline (15).
6. A multi-stage pressure regulating method of a logic valve as a pressure reducing valve of a multi-stage pressure regulating system of a logic valve as a pressure reducing valve according to any one of claims 1 to 5, characterized in that the method comprises the steps of:
when the control oil source end (12) supplies oil to a hydraulic control port of the hydraulic control reversing valve (1), a pressure oil source of the pressure oil source end (11) enters an inlet of the logic valve (2), an outlet supplies oil to the propulsion motor (9), the propulsion motor (9) rotates forwards, meanwhile, pressure regulating control oil of the logic valve (2) enters the superposed overflow valve (5) through the electromagnetic valve (4) and the high-low pressure valve (7) and reaches the remote pressure regulating valve (6), the outlet pressure of the logic valve (2) is regulated through the remote pressure regulating valve (6), and the control of the driving pressure of the propulsion motor (9) is realized.
7. The multi-stage pressure regulating method of the logic valve as the pressure reducing valve according to claim 6 is characterized in that when the fast-forwarding work is carried out, the electromagnetic valve (4) cuts off the logic valve (2) to control the oil path of the oil source, the outlet pressure of the logic valve (2) is the inlet pressure, and the high-flow and high-pressure fast rotation of the propulsion motor (9) is realized.
8. The multistage pressure regulating method of a logic valve as a pressure reducing valve according to claim 6, characterized in that when a drill rod is changed, the high-low pressure valve (7) is communicated, the control oil path of the logic valve (2) is communicated with the low pressure regulating valve of the superposition type overflow valve (5), the outlet pressure of the logic valve (2) is a low pressure set value, and the low-pressure work of the propulsion motor (9) is realized.
9. The multi-stage pressure regulating method of the logic valve as the pressure reducing valve according to the claim 6 is characterized in that when the rock drilling process is carried out, the electromagnetic valve (4) and the high-low pressure valve (7) are not communicated, the control oil path of the logic valve (2) reaches the remote pressure regulating valve (6), and the operator can realize the real-time control of the propelling pressure by regulating the remote pressure regulating valve (6) on the cab or the operation platform according to the requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110302850.7A CN112943718B (en) | 2021-03-22 | 2021-03-22 | Multistage pressure regulating system and method with logic valve as pressure reducing valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110302850.7A CN112943718B (en) | 2021-03-22 | 2021-03-22 | Multistage pressure regulating system and method with logic valve as pressure reducing valve |
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| CN112943718A true CN112943718A (en) | 2021-06-11 |
| CN112943718B CN112943718B (en) | 2023-06-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023010636A1 (en) * | 2021-07-31 | 2023-02-09 | 广东美的制冷设备有限公司 | Method and device for detecting state of high-and-low pressure valve of air conditioner, air conditioner, and medium |
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| JPH09228425A (en) * | 1996-02-26 | 1997-09-02 | Shin Caterpillar Mitsubishi Ltd | Control circuit of traveling hydraulic motor |
| CN201412136Y (en) * | 2009-06-22 | 2010-02-24 | 浙江志高机械有限公司 | Anti-rotary drill jamming control system |
| CN102747949A (en) * | 2012-07-19 | 2012-10-24 | 山河智能装备股份有限公司 | Fast propulsion hydraulic control loop of down-the-hole drill rig |
| CN103758803A (en) * | 2013-12-31 | 2014-04-30 | 山河智能装备股份有限公司 | Hydraulic drill rig bit assembling and disassembling rotation and pushing self-adaptive hydraulic loop and control method thereof |
| CN204024461U (en) * | 2014-08-07 | 2014-12-17 | 深圳市桑特液压技术有限公司 | Drill power head drill autofeeder |
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2021
- 2021-03-22 CN CN202110302850.7A patent/CN112943718B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09228425A (en) * | 1996-02-26 | 1997-09-02 | Shin Caterpillar Mitsubishi Ltd | Control circuit of traveling hydraulic motor |
| CN201412136Y (en) * | 2009-06-22 | 2010-02-24 | 浙江志高机械有限公司 | Anti-rotary drill jamming control system |
| CN102747949A (en) * | 2012-07-19 | 2012-10-24 | 山河智能装备股份有限公司 | Fast propulsion hydraulic control loop of down-the-hole drill rig |
| CN103758803A (en) * | 2013-12-31 | 2014-04-30 | 山河智能装备股份有限公司 | Hydraulic drill rig bit assembling and disassembling rotation and pushing self-adaptive hydraulic loop and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023010636A1 (en) * | 2021-07-31 | 2023-02-09 | 广东美的制冷设备有限公司 | Method and device for detecting state of high-and-low pressure valve of air conditioner, air conditioner, and medium |
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| CN112943718B (en) | 2023-06-16 |
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