CN113775601A - Automatic pressure measurement protection method for hydraulic system of extruder - Google Patents
Automatic pressure measurement protection method for hydraulic system of extruder Download PDFInfo
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- CN113775601A CN113775601A CN202010526878.4A CN202010526878A CN113775601A CN 113775601 A CN113775601 A CN 113775601A CN 202010526878 A CN202010526878 A CN 202010526878A CN 113775601 A CN113775601 A CN 113775601A
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- hydraulic
- hydraulic system
- pressure
- hydraulic pump
- pressure value
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Classifications
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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
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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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
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/005—Fault detection or monitoring
-
- 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/004—Fluid pressure supply failure
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/857—Monitoring of fluid pressure systems
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/86—Control during or prevention of abnormal conditions
- F15B2211/863—Control during or prevention of abnormal conditions the abnormal condition being a hydraulic or pneumatic failure
- F15B2211/8633—Pressure source supply failure
Abstract
The invention discloses an automatic pressure measurement protection method for a hydraulic system of an extruder, which comprises the steps of firstly arranging a pressure sensor at a hydraulic oil pressure measurement point of a hydraulic pump for detecting a hydraulic oil pressure value; and then, an alarm module is added on a computer control unit of the hydraulic system, the alarm module receives a pressure value detected by a pressure sensor, whether the hydraulic pump breaks down or not is judged, once the hydraulic pump breaks down, the computer control unit sends out an alarm signal, and the hydraulic pump is stopped after 1.5-2.5 min of delay. The automatic pressure measurement protection method for the hydraulic system of the extruder can send out an alarm and automatically stop running when the hydraulic pump is damaged, and waits for the repair of equipment operators.
Description
Technical Field
The invention relates to the field of hydraulic control systems, in particular to an automatic pressure measurement protection method for a hydraulic system of an extruder.
Background
High-end seamless steel pipes, such as: oil well pipes and the like for oil drilling need to be produced by adopting the processes of forging, chambering, extruding and the like so as to achieve the required mechanical properties; the 60MN extruder is key process equipment in the hot extrusion production process of the steel pipe, the extrusion production is mainly powered by 6 hydraulic pumps and 12 groups of energy accumulators, and a hydraulic system is mainly composed of 6 hydraulic pumps, an electric control unloading valve 3 for controlling the pressure of the hydraulic pumps and 12 groups of energy accumulators; the control principle of the hydraulic pump of the extruding machine is shown in fig. 1, after the extruding machine enters an automatic state, 6 groups of electric control unloading valves 3 are electrified, the hydraulic pump system enters a 300Bar high-pressure state, 6 hydraulic pumps (P10, P11, P12, P13, P14 and P15) output high-pressure oil, the high-pressure oil is respectively provided for 2 groups of energy accumulators (PAK1 and PAK2) through a hydraulic pipeline by virtue of a one-way valve 2 arranged on each hydraulic pump, and the energy accumulators and the hydraulic pumps simultaneously provide the high-pressure oil for the extruding machine when a steel pipe is extruded; once the hydraulic pump is damaged after long-term use, equipment users cannot obtain equipment damage information in time and continue to produce, a large amount of metal particles are generated by the damaged hydraulic pump to enter a hydraulic system, hydraulic oil is polluted, accidents are enlarged, and other hydraulic pumps and control valves in the hydraulic system are damaged.
In view of the above circumstances, it is desirable to develop an automatic pressure measurement protection method for a hydraulic system, which can issue an alarm and automatically stop operation when a hydraulic pump is damaged, and wait for repair of equipment maintenance personnel, so as to avoid that the damaged hydraulic pump generates a large amount of metal particles to enter the hydraulic system, and pollute hydraulic oil, which leads to an enlarged accident and damages to other hydraulic pumps and control valves in the hydraulic system.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an automatic pressure measurement protection method for a hydraulic system of an extruder, which can send out an alarm and automatically stop running when a hydraulic pump is damaged, wait for repair of equipment maintainers, and further avoid that the damaged hydraulic pump generates a large amount of metal particles to enter the hydraulic system to pollute hydraulic oil, so that accidents are enlarged and other hydraulic pumps and control valves in the hydraulic system are damaged.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for automatic pressure measurement protection of a hydraulic system of an extruder comprises the steps of firstly arranging a pressure sensor at a hydraulic oil pressure measurement point of a hydraulic pump for detecting the pressure value of hydraulic oil; and then, an alarm module is added on a computer control unit of the hydraulic system, the alarm module receives a pressure value detected by a pressure sensor and judges whether the hydraulic pump fails, and once the hydraulic pump fails, the computer control unit sends an alarm signal and stops after delaying for 1.5-2.5 min.
Preferably, the method for automatic pressure measurement protection of the hydraulic system of the extruder specifically comprises the following steps:
1) when the extruder enters an automatic state, the electric control unloading valve of the hydraulic pump is electrified;
2) the hydraulic system enters a high-pressure state of more than or equal to 300bar and provides hydraulic oil for the energy accumulator;
3) the pressure sensor detects the pressure value of the hydraulic oil and transmits the pressure value to the alarm module;
4) the alarm module receives a hydraulic oil pressure value detected by the pressure sensor, if the hydraulic oil pressure value is less than or equal to 200Bar, the computer control unit sends an alarm signal, the computer control unit is stopped after delaying for 1.5-2.5 min, and an operator waits for overhaul; if the pressure value of the hydraulic oil is larger than 200Bar, the extruder enters normal extrusion production.
Preferably, the computer control unit sends out an alarm signal and stops after delaying for 2 min.
Preferably, in the step 2), the hydraulic system enters a high-pressure state of 300-320 bar.
The invention has the beneficial effects that:
1. according to the method for automatic pressure measurement protection of the hydraulic system, the pressure value of hydraulic oil of the hydraulic pump is detected, when the pressure value of the hydraulic oil is smaller than or equal to 200Bar, the computer control unit sends an alarm to remind equipment maintainers to repair the hydraulic pump, and the hydraulic pump is automatically stopped to run, so that the situation that the damaged hydraulic pump generates a large amount of metal particles to enter the hydraulic system to pollute the hydraulic oil, and the accident is expanded to damage other hydraulic pumps and control valves in the hydraulic system is avoided;
2. according to the method for automatic pressure measurement protection of the hydraulic system, the pressure value of hydraulic oil is measured on line through the pressure sensor, once the pressure of the hydraulic system is abnormal, an alarm signal can be sent out through the calculation control unit, and the operation of the hydraulic pump is stopped automatically in a delayed mode, so that the mode can accurately and timely judge the ancient installation of the hydraulic pump, can reduce the influence on production, can prevent the accident from being expanded, and creates conditions for long-term stable operation of the hydraulic system;
3. the method for automatic pressure measurement protection of the hydraulic system better solves the problem that a large amount of metal particles enter the hydraulic system because the hydraulic pump cannot be found in time after being damaged, is suitable for various hydraulic systems of the same type, and has wide application prospect.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic diagram of a prior art hydraulic pump control;
FIG. 2 is a control schematic of the improved hydraulic pump;
fig. 3 is a schematic flow chart of a method for automatic pressure measurement protection of a hydraulic system.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way.
Referring to fig. 2 to 3, in the method for automatic pressure measurement protection of a hydraulic system of an extruder according to the present invention, a pressure sensor 4 is first installed at a hydraulic oil pressure measurement point of each hydraulic pump (P10, P11, P12, P13, P14, P15) to detect a hydraulic oil pressure value; and then, adding an alarm module on a computer control unit of the hydraulic system, wherein the alarm module receives a pressure value detected by the pressure sensor 4, judges whether the hydraulic pump (P10, P11, P12, P13, P14 and P15) breaks down, and once the hydraulic pump breaks down, the computer control unit sends an alarm signal and stops after delaying for 1.5-2.5 min.
The method for automatic pressure measurement protection of the hydraulic system of the extruder provided by the invention specifically comprises the following steps:
1) when the extruder enters an automatic state, the electric control unloading valve 3 of the hydraulic pump is electrified;
2) when the hydraulic system enters a high-pressure state of more than or equal to 300bar, the one-way valve 2 is communicated, and hydraulic oil is provided for the energy accumulator through the high-pressure output pipeline 1 of the hydraulic pump; preferably, the hydraulic system enters a high-pressure state of 300-320 bar, such as 305bar or 315 bar;
3) the pressure sensor 4 detects the pressure value of the hydraulic oil and transmits the pressure value to the alarm module;
4) the alarm module receives a hydraulic oil pressure value detected by the pressure sensor 4, if the hydraulic oil pressure value is less than or equal to 200Bar, the computer control unit sends an alarm signal, the computer control unit is stopped after delaying for 1.5-2.5 min, and an operator waits for overhaul; the optimized computer control unit sends out an alarm signal, and stops the machine after delaying for 2 min; if the pressure value of the hydraulic oil is larger than 200Bar, the extruder enters normal extrusion production.
The above method is further explained by the specific embodiments and the figures.
Examples
In the prior art, an extruder is a key process device in a steel tube hot extrusion production process, taking a 60MN extruder as an example, and combining a control schematic diagram of a 60MN extruder hydraulic pump in fig. 1, the extruder is mainly powered by 6 hydraulic pumps (P10, P11, P12, P13, P14, P15) and 2 groups of energy accumulators (PAK1, PAK2) during extrusion production, and a hydraulic system mainly comprises 6 hydraulic pumps (P10, P11, P12, P13, P14, P15), 6 groups of electrically controlled unloading valves 3 for controlling pressures of the hydraulic pumps (P10, P11, P12, P13, P14, P15), and 2 groups of energy accumulators (PAK1, PAK 2); when the extruder enters an automatic state, the electric control unloading valve 3 is electrified, the hydraulic pump system enters a 300Bar high-pressure state, high-pressure hydraulic oil passes through the one-way valve 2 and provides high-pressure hydraulic oil for the energy accumulators (PAK1 and PAK2) through the hydraulic pipeline, and the energy accumulators (PAK1 and PAK2) and the hydraulic pumps (P10, P11, P12, P13, P14 and P15) provide high-pressure hydraulic oil for the extruder simultaneously when the steel pipe is extruded;
as shown in the control schematic diagram of the improved hydraulic pump shown in fig. 2, in the method for automatic pressure measurement protection of the hydraulic system of the extruder provided by this embodiment, first, a pressure sensor 4 is arranged at a hydraulic oil pressure measurement point of each hydraulic pump, and is used for detecting a hydraulic oil pressure value; and then, an alarm module is added on a computer control unit of the hydraulic system, the alarm module receives a pressure value detected by the pressure sensor 4 and judges whether the hydraulic pump fails, and once the hydraulic pump fails, the computer control unit sends an alarm signal and stops after delaying for 1.5-2.5 min.
As shown in fig. 3, the method for automatic pressure measurement protection of a hydraulic system of an extruder provided in this embodiment specifically includes the following steps:
1) when the extruder enters an automatic state, the electric control unloading valve 3 of the hydraulic pump is electrified;
2) when the hydraulic system enters a high-pressure state of more than or equal to 300bar, the one-way valve 2 is communicated, and hydraulic oil is provided for the energy accumulators (PAK1 and PAK2) through the hydraulic pump high-pressure output pipeline 1; preferably, the hydraulic system enters a high-pressure state of 300-320 bar, such as 305bar or 315 bar;
3) the pressure sensor 4 detects the pressure value of the hydraulic oil and transmits the pressure value to the alarm module;
4) the alarm module receives a hydraulic oil pressure value detected by the pressure sensor 4, if the hydraulic oil pressure value is less than or equal to 200Bar, the computer control unit sends an alarm signal, the computer control unit is stopped after delaying for 1.5-2.5 min, and an operator waits for overhaul; the optimized computer control unit sends out an alarm signal, and stops the machine after delaying for 2 min; if the pressure value of the hydraulic oil is larger than 200Bar, the extruder enters normal extrusion production.
According to the method for automatic pressure measurement protection of the hydraulic system, the pressure value of hydraulic oil of the hydraulic pump is detected, when the pressure value of the hydraulic oil is smaller than or equal to 200Bar, the computer control unit sends an alarm to remind equipment maintainers to repair the hydraulic pump, and the hydraulic pump is automatically stopped to run, so that the situation that a damaged hydraulic pump generates a large amount of metal particles to enter the hydraulic system to pollute the hydraulic oil, and accidents are expanded to damage other hydraulic pumps and control valves in the hydraulic system is avoided; according to the method for automatic pressure measurement protection of the hydraulic system, the pressure value of hydraulic oil is measured on line through the pressure sensor, once the pressure of the hydraulic system is abnormal, an alarm signal can be sent out through the calculation control unit, and the operation of the hydraulic pump is stopped automatically in a delayed mode, so that the mode can accurately and timely judge the ancient installation of the hydraulic pump, can reduce the influence on production, can prevent the accident from being expanded, and can create conditions for long-term stable operation of the hydraulic system; the method for automatic pressure measurement protection of the hydraulic system well solves the problem that a large amount of metal particles enter the hydraulic system due to the fact that the hydraulic pump cannot be found in time after being damaged, is suitable for various hydraulic systems of the same type, and has a wide application prospect.
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 various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (4)
1. A method for automatic pressure measurement protection of a hydraulic system of an extruder is characterized in that a pressure sensor is arranged at a hydraulic oil pressure measurement point of a hydraulic pump and used for detecting a hydraulic oil pressure value; and then, an alarm module is added on a computer control unit of the hydraulic system, the alarm module receives a pressure value detected by the pressure sensor and judges whether the hydraulic pump fails, and once the hydraulic pump fails, the computer control unit sends an alarm signal and stops after delaying for 1.5-2.5 min.
2. The method for automatic pressure measurement protection of the hydraulic system of the extruding machine according to claim 1, wherein the method for automatic pressure measurement protection of the hydraulic system of the extruding machine specifically comprises the following steps:
1) when the extruder enters an automatic state, the electric control unloading valve of the hydraulic pump is electrified;
2) the hydraulic system enters a high-pressure state of more than or equal to 300bar and provides hydraulic oil for the energy accumulator;
3) the pressure sensor detects the pressure value of the hydraulic oil and transmits the pressure value to the alarm module;
4) the alarm module receives a hydraulic oil pressure value detected by the pressure sensor, if the hydraulic oil pressure value is less than or equal to 200Bar, the computer control unit sends an alarm signal, the computer control unit is stopped after delaying for 1.5-2.5 min, and an operator waits for overhaul; if the pressure value of the hydraulic oil is larger than 200Bar, the extruder enters normal extrusion production.
3. The method for automatic pressure measurement protection of the hydraulic system of the extruding machine as claimed in claim 1 or 2, wherein the computer control unit sends out an alarm signal and stops after 2min delay.
4. The method for automatic pressure measurement protection of the hydraulic system of the extruding machine as claimed in claim 2, wherein in the step 2), the hydraulic system enters a high-pressure state of 300-320 bar.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010526878.4A CN113775601A (en) | 2020-06-10 | 2020-06-10 | Automatic pressure measurement protection method for hydraulic system of extruder |
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| CN202010526878.4A CN113775601A (en) | 2020-06-10 | 2020-06-10 | Automatic pressure measurement protection method for hydraulic system of extruder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116906477A (en) * | 2023-07-17 | 2023-10-20 | 大庆石油管理局有限公司 | Hydraulic transmission system device used in tower type pumping unit hand brake |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4181017A (en) * | 1978-08-07 | 1980-01-01 | Markle Charles R | Fault detecting apparatus for fluid pressure systems |
| WO1994000739A1 (en) * | 1992-06-26 | 1994-01-06 | Kabushiki Kaisha Komatsu Seisakusho | Device for detecting amount of metallic powder for hydraulic circuit |
| US7013223B1 (en) * | 2002-09-25 | 2006-03-14 | The Board Of Trustees Of The University Of Illinois | Method and apparatus for analyzing performance of a hydraulic pump |
| CN102562560A (en) * | 2011-12-16 | 2012-07-11 | 中国航空工业集团公司北京长城航空测控技术研究所 | Real-time detection method for abrasion of hydraulic pump |
| CN204284082U (en) * | 2014-11-25 | 2015-04-22 | 南车青岛四方机车车辆股份有限公司 | A kind of leak detection system of hydraulic station |
| CN204664019U (en) * | 2015-05-28 | 2015-09-23 | 宁波融合流体技术有限公司 | A kind of roll squeezer detects leakage of oil hydraulic pressure installation |
| CN106683330A (en) * | 2017-03-07 | 2017-05-17 | 广东工业大学 | Visualized warning device, visualized warning system and hydraulic station visualized warning system |
| CN107560984A (en) * | 2017-07-28 | 2018-01-09 | 西北工业大学 | The oil liquid pollution on-line monitoring device and monitoring method of a kind of hydraulic system |
| CN109798283A (en) * | 2019-01-21 | 2019-05-24 | 江苏大学 | One kind remotely controlling more relay protective scheme function central pumping stations |
| DE102019117820A1 (en) * | 2018-08-24 | 2020-02-27 | Engel Austria Gmbh | Method and device for monitoring the condition of a hydraulic pump |
| CN210686508U (en) * | 2019-09-06 | 2020-06-05 | 广州市环境卫生机械设备厂 | Prevent leaking hydraulic system and hydraulic means based on pressure is compared |
-
2020
- 2020-06-10 CN CN202010526878.4A patent/CN113775601A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4181017A (en) * | 1978-08-07 | 1980-01-01 | Markle Charles R | Fault detecting apparatus for fluid pressure systems |
| WO1994000739A1 (en) * | 1992-06-26 | 1994-01-06 | Kabushiki Kaisha Komatsu Seisakusho | Device for detecting amount of metallic powder for hydraulic circuit |
| US7013223B1 (en) * | 2002-09-25 | 2006-03-14 | The Board Of Trustees Of The University Of Illinois | Method and apparatus for analyzing performance of a hydraulic pump |
| CN102562560A (en) * | 2011-12-16 | 2012-07-11 | 中国航空工业集团公司北京长城航空测控技术研究所 | Real-time detection method for abrasion of hydraulic pump |
| CN204284082U (en) * | 2014-11-25 | 2015-04-22 | 南车青岛四方机车车辆股份有限公司 | A kind of leak detection system of hydraulic station |
| CN204664019U (en) * | 2015-05-28 | 2015-09-23 | 宁波融合流体技术有限公司 | A kind of roll squeezer detects leakage of oil hydraulic pressure installation |
| CN106683330A (en) * | 2017-03-07 | 2017-05-17 | 广东工业大学 | Visualized warning device, visualized warning system and hydraulic station visualized warning system |
| CN107560984A (en) * | 2017-07-28 | 2018-01-09 | 西北工业大学 | The oil liquid pollution on-line monitoring device and monitoring method of a kind of hydraulic system |
| DE102019117820A1 (en) * | 2018-08-24 | 2020-02-27 | Engel Austria Gmbh | Method and device for monitoring the condition of a hydraulic pump |
| CN109798283A (en) * | 2019-01-21 | 2019-05-24 | 江苏大学 | One kind remotely controlling more relay protective scheme function central pumping stations |
| CN210686508U (en) * | 2019-09-06 | 2020-06-05 | 广州市环境卫生机械设备厂 | Prevent leaking hydraulic system and hydraulic means based on pressure is compared |
Non-Patent Citations (1)
| Title |
|---|
| 袁志学等: "《高速线材生产》", 冶金工业出版社, pages: 117 - 118 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116906477A (en) * | 2023-07-17 | 2023-10-20 | 大庆石油管理局有限公司 | Hydraulic transmission system device used in tower type pumping unit hand brake |
| CN116906477B (en) * | 2023-07-17 | 2024-01-30 | 大庆石油管理局有限公司 | Hydraulic transmission system device used in tower type pumping unit hand brake |
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