CN113847286A - Intelligent adjusting belt device - Google Patents
Intelligent adjusting belt device Download PDFInfo
- Publication number
- CN113847286A CN113847286A CN202111158120.0A CN202111158120A CN113847286A CN 113847286 A CN113847286 A CN 113847286A CN 202111158120 A CN202111158120 A CN 202111158120A CN 113847286 A CN113847286 A CN 113847286A
- Authority
- CN
- China
- Prior art keywords
- hydraulic cylinder
- hydraulic
- upper plate
- belt
- movable upper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 9
- 238000004146 energy storage Methods 0.000 claims description 17
- 238000010248 power generation Methods 0.000 claims description 15
- 230000001012 protector Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 2
- 238000005299 abrasion Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Images
Classifications
-
- 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- 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
-
- 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
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0802—Actuators for final output members
- F16H2007/0812—Fluid pressure
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
The embodiment of the invention discloses an intelligent belt adjusting device.A hydraulic automatic station is connected with a hydraulic cylinder through a hydraulic oil pipe and drives a movable upper plate on the hydraulic cylinder to move; a main motor is fixed on the movable upper plate and drives the driving wheel to drive the belt to transmit; the pressure sensor is positioned on the hydraulic cylinder, monitors the pressure of the hydraulic cylinder and transmits the monitored pressure value to the external controller; the controller adjusts the pressure of the automatic hydraulic station according to the received pressure value, drives the hydraulic cylinder to move, and realizes intelligent and automatic adjustment of the belt; the tightness of the belt is intelligently and automatically adjusted in a hydraulic mode, and the belt can be automatically adjusted according to the monitored pressure value when the belt is in a tight state which is invisible to naked eyes, so that the time of the belt in the tight state is greatly shortened, and the abrasion of the belt is reduced; the automatic hydraulic mode has the advantages of high starting speed, good stability and high safety factor.
Description
Technical Field
The invention belongs to the technical field of oil exploitation, and particularly relates to an intelligent adjusting belt device in an oil exploitation process.
Background
In the process of oil exploitation, the loss of the belt is large; in the related technology, the steering of a driving motor is manually adjusted to realize the movement of the position of a main motor, so that the distance between a driving wheel fixed on the main motor and a driven wheel is adjusted, and finally the tension of a belt is adjusted, and the tightening force is moderate; but the tension of the belt is adjusted according to the visible tightness of the belt, and in the actual use process, the tightness of the belt is not easy to be found by naked eyes and cannot be effectively adjusted in time.
Disclosure of Invention
In order to solve the technical problem, embodiments of the present invention provide a device capable of monitoring a pressure during a belt transmission process and intelligently adjusting a tightness of a belt according to the monitored pressure.
The embodiment of the invention provides an intelligent belt adjusting device which comprises an automatic hydraulic station, a hydraulic cylinder, a pressure sensor, an energy storage device, a self-generating device and a movable upper plate, wherein the automatic hydraulic station is arranged on the upper plate; the automatic hydraulic station is connected with the hydraulic cylinder through a hydraulic oil pipe and drives the movable upper plate on the hydraulic cylinder to move; a main motor is fixed on the movable upper plate and drives a driving wheel to drive a belt to transmit; the pressure sensor is positioned on the hydraulic cylinder, monitors the pressure of the hydraulic cylinder and transmits the monitored pressure value to the external controller; the self-generating device uses the stored electric energy to drive the automatic hydraulic station through the energy storage device.
Further, the automatic hydraulic station comprises a motor and a pressure sensor, and the pressure sensor controls the motor to be started and stopped according to signals transmitted by the controller; and after the motor is shut down, the pressure controller controls the pressure of the automatic hydraulic station.
Furthermore, the self-generating device comprises a photovoltaic generator set and a wind generating set, and electric energy generated by the photovoltaic generator set and the wind generating set is transmitted to the energy storage device.
The hydraulic system further comprises a manual operating lever and a manual hydraulic station, wherein the manual hydraulic station is connected with the hydraulic cylinder through a hydraulic oil pipe; and the manual hydraulic station is driven by the manual operating lever to drive the movable upper plate on the hydraulic cylinder to move.
Further, the hydraulic cylinder is located between the lower base plate and the movable upper plate and is fixed between the lower base plate and the upper plate through a fixing pin and a fixing bolt.
Furthermore, a slideway support is fixed on the lower bottom plate, and a sliding rod is arranged on the slideway support; the bottom of portable upper plate be equipped with the slide that the slide bar matches, the slide registrate be in on the slide bar, can follow the slide bar slides.
Further, still include spacing protector, spacing protector is located the one end of slide bar.
The technical scheme provided by the embodiment of the invention has the following beneficial effects: the embodiment of the invention provides an intelligent belt adjusting device which comprises an automatic hydraulic station, a hydraulic cylinder, a pressure sensor, an energy storage device, a self-generating device and a movable upper plate, wherein the automatic hydraulic station is arranged on the upper plate; the automatic hydraulic station is connected with the hydraulic cylinder through a hydraulic oil pipe and drives the movable upper plate on the hydraulic cylinder to move; a main motor is fixed on the movable upper plate and drives a driving wheel to drive a belt to transmit; the pressure sensor is positioned on the hydraulic cylinder, monitors the pressure of the hydraulic cylinder and transmits the monitored pressure value to the external controller; the external controller adjusts the pressure of the automatic hydraulic station according to the received pressure value, drives the hydraulic cylinder to stretch and move, and the movable upper plate is driven to move by stretching and retracting of the hydraulic cylinder, so that the intelligent automatic adjustment of the belt is realized; the tightness of the belt is intelligently and automatically adjusted in a hydraulic mode, and the belt can be automatically adjusted according to the monitored pressure value when the belt is in a tight state which is invisible to naked eyes, so that the time of the belt in the tight state is greatly shortened, and the abrasion of the belt is reduced; the intelligent regulation by adopting a hydraulic mode has high starting speed, good stability and high safety factor; the self-generating device passes through the electric energy that energy storage device will save is used for the drive automatic hydraulic pressure station, from the setting of power generation device reduced the use amount of electric energy, the cost is reduced, and energy storage device can provide the electric energy for automatic hydraulic pressure station under the special circumstances, guarantees its operation, has further improved the stability of belt adjustment in-process.
Drawings
FIG. 1 is a schematic diagram of an intelligent adjustment belt device in accordance with an embodiment of the present invention;
fig. 2 is a top view of an intelligent adjustment belt device according to an embodiment of the present invention.
The system comprises an automatic hydraulic station 1, a hydraulic oil pipe 11, a motor 12, a pressure sensor 13, an alarm device 14, a hydraulic cylinder 2, an energy storage device 3, a self-generating device 4, a movable upper plate 5, a slide way 51, a manual operating lever 6, a manual hydraulic station 7, a lower base plate 8, a slide way support 81, a slide rod 82 and a limit protector 9.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Referring to fig. 1 and 2, an embodiment of the present invention provides an intelligent belt adjusting apparatus, including an automatic hydraulic station 1, a hydraulic cylinder 2, a pressure sensor, an energy storage apparatus 3, a self-generating apparatus 4, and a movable upper plate 5; the automatic hydraulic station 1 is connected with the hydraulic cylinder 2 through a hydraulic oil pipe 11 and drives the hydraulic cylinder 2 to move; the movable upper plate 5 is positioned above the hydraulic cylinder 2, and the hydraulic cylinder 2 drives the movable upper plate 5 to move; a main motor is fixed on the movable upper plate 5 and drives a driving wheel to drive a belt to transmit; the pressure sensor is positioned on the hydraulic cylinder 2, monitors the pressure of the hydraulic cylinder 2, and transmits the monitored pressure value to an external controller; the self-generating device 4 uses the stored electric energy to drive the automatic hydraulic station 1 through the energy storage device 3. The automatic belt tightness adjusting device comprises a controller, a movable upper plate 5, a driving wheel, a belt adjusting efficiency, a belt tension adjusting device and a belt tension adjusting device, wherein the controller controls starting and stopping of an automatic hydraulic station 1 according to a pressure value transmitted by a pressure sensor on a hydraulic cylinder 2, the automatic hydraulic station 1 drives the hydraulic cylinder 2 to stretch and move to drive the movable upper plate 5 to move, and accordingly automatic adjustment of the belt tension is achieved; the cost is reduced; the electric energy generated by the self-generating device 4 provides electric energy for the automatic hydraulic station 1 through the energy storage device 3, so that the stable operation of the automatic hydraulic station 1 can be ensured, the cost is reduced, and the environment protection property and the energy source are improved and saved by adopting clean renewable energy; the belt is automatically adjusted in a hydraulic mode, so that the loss is small, the starting is fast, and the stability is good.
The pressure value of the automatic hydraulic station 1 is 16MPa, and the pressure value of the hydraulic cylinder 2 is 16 MPa.
Preferably, the automatic hydraulic station 1 comprises a motor 12 and a pressure sensor 13, wherein the pressure sensor 13 controls the motor 12 to be started and stopped according to signals transmitted by a controller; after the motor 12 is shut down, the pressure sensor 13 controls the pressure of the automatic hydraulic station 1 at the same time, so that the automatic hydraulic station 1 is always kept at a certain pressure and can be started again quickly. The motor 12 is a cycloid needle motor, and the cycloid needle motor and the speed reducer are integrated, so that the pressure of the automatic hydraulic station 1 can be buffered, and the stability of the automatic hydraulic station is further improved; the motor 12 can be connected with 380V voltage or 24V voltage, and the stability of the automatic hydraulic station 1 is further improved.
Preferably, the automatic hydraulic station 1 comprises an alarm device 14, the controller transmits an alarm command to the alarm device 14 according to the pressure value monitored by the pressure sensor, and the alarm device 14 is a warning light. When the pressure value monitored by the pressure sensor on the hydraulic cylinder 2 is too large or too small, the controller sends an alarm command to the alarm device 14 according to the pressure value received by the controller.
Preferably, the self-generating device 4 comprises a photovoltaic power generation unit and a wind power generation unit, and electric energy generated by the photovoltaic power generation unit and the wind power generation unit is transmitted into the energy storage device 3; the photovoltaic power generation unit adopts two 300W photovoltaic power generation boards and can generate electricity at 0.6 ℃ per hour; the full power of the wind power generation unit can generate 0.6 degree per hour under the condition of 5-level wind; the energy storage device 3 is a 2-block 150A battery. The storage battery can be used for the automatic hydraulic station 1 to work for 3 hours under the condition of full charge, and the energy storage device 3 can be adopted to provide electric energy for the automatic hydraulic station 1 under the emergency condition of power failure so as to maintain the normal operation of the belt regulation work.
Preferably, the device further comprises a manual operating lever 6 and a manual hydraulic station 7, wherein the manual hydraulic station 7 is connected with the hydraulic cylinder 2 through a hydraulic oil pipe 11; the manual hydraulic station 7 is driven by the manual operating lever 6 to drive the movable upper plate 5 on the hydraulic cylinder 2 to move. When the automatic hydraulic station 1 cannot be used, the manual hydraulic station 7 can be used for manually adjusting the tightness of the belt. The manual hydraulic station 7 controls the pressure by a holding valve.
Preferably, the hydraulic cylinder 2 is located between the lower bottom plate 8 and the movable upper plate 5, and is fixed between the lower bottom plate 8 and the movable upper plate 5 through a fixing pin and a fixing bolt; further, one end of the hydraulic cylinder 2 is fixed to the bottom of the movable upper plate 5, and the other end is fixed to the lower plate 8. When the automatic hydraulic station 1 acts on the hydraulic cylinder 2, the hydraulic cylinder 2 stretches and retracts to drive the movable upper plate 5 to move, so that the position of the driving wheel is adjusted, and the belt is automatically adjusted.
Preferably, a slide support 81 is arranged on the lower bottom plate 8, and a slide rod 82 is arranged on the slide support 81; the bottom of the movable upper plate 5 is provided with a slideway 51 matched with the sliding rod 82, and the slideway 51 is sleeved on the sliding rod 82 and can slide along the sliding rod 82; furthermore, 2 slide supports 81 and 2 slides 82 are provided; the hydraulic cylinder 2 is located between the two slide supports 81. When the hydraulic cylinder 2 moves, the slide rail 51 of the movable upper plate 5 is driven to move along the slide rod 82.
Preferably, the slide way further comprises a limit protector 9, wherein the limit protector 9 is positioned at one end of the slide way support 82. The limiting protector 9 limits the moving distance of the slide way 51, prevents the slide way 51 from moving too far, and further improves the safety of the device of the embodiment of the invention.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides an intelligent regulation belt device which characterized by: the automatic hydraulic station comprises an automatic hydraulic station, a hydraulic cylinder, a pressure sensor, an energy storage device, a self-generating device and a movable upper plate; the automatic hydraulic station is connected with the hydraulic cylinder through a hydraulic oil pipe to drive the hydraulic cylinder to move; the movable upper plate is positioned above the hydraulic cylinder, and the hydraulic cylinder drives the movable upper plate to move; a main motor is fixed on the movable upper plate and drives a driving wheel to drive a belt to transmit; the pressure sensor is positioned on the hydraulic cylinder, monitors the pressure of the hydraulic cylinder and transmits the monitored pressure value to an external controller, and the controller controls the pressure of the automatic hydraulic station according to the received pressure value; the self-generating device uses the stored electric energy to drive the automatic hydraulic station through the energy storage device.
2. The intelligent adjusting belt device as claimed in claim 1, wherein: the automatic hydraulic station comprises a motor and a pressure sensor, and the pressure sensor controls the motor to be started and stopped according to signals transmitted by a controller.
3. The intelligent adjusting belt device as claimed in claim 1, wherein: the automatic hydraulic station comprises an alarm device, and the controller transmits an alarm instruction to the alarm device according to the received pressure value monitored by the pressure sensor.
4. The intelligent adjusting belt device as claimed in claim 1, wherein: the self-generating device comprises a photovoltaic power generation unit and a wind power generation unit, and electric energy generated by the photovoltaic power generation unit and the wind power generation unit is transmitted to the energy storage device.
5. The intelligent adjusting belt device as claimed in claim 4, wherein: the photovoltaic power generation unit adopts two 300W photovoltaic power generation boards and can generate electricity at 0.6 ℃ per hour; the full power of the wind power generation unit can generate 0.6 degree per hour under the condition of 5-level wind; the energy storage device is a 2-block 150A battery.
6. The intelligent adjusting belt device as claimed in claim 1, wherein: the hydraulic system also comprises a manual operating lever and a manual hydraulic station, wherein the manual hydraulic station is connected with the hydraulic cylinder through a hydraulic oil pipe; and the manual hydraulic station is driven by the manual operating lever to drive the movable upper plate on the hydraulic cylinder to move.
7. The intelligent adjusting belt device as claimed in claim 1, wherein: the hydraulic cylinder is positioned between the lower bottom plate and the movable upper plate and is fixed between the lower bottom plate and the movable upper plate through a fixing pin and a fixing bolt.
8. The intelligent adjusting belt device as claimed in claim 7, wherein: one end of the hydraulic cylinder is fixed at the bottom of the movable upper plate, and the other end of the hydraulic cylinder is fixed on the lower bottom plate.
9. The intelligent adjusting belt device as claimed in claim 7, wherein: the lower bottom plate is provided with a slideway support, and the slideway support is provided with a sliding rod; the bottom of the movable upper plate is provided with a slide way matched with the slide rod, and the slide way is sleeved on the slide rod and can slide along the slide rod; the hydraulic cylinder is positioned between the two slideway supports.
10. The intelligent adjusting belt device as claimed in claim 9, wherein: still include spacing protector, spacing protector is located the one end of slide pillar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111158120.0A CN113847286B (en) | 2021-09-30 | 2021-09-30 | Intelligent belt adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111158120.0A CN113847286B (en) | 2021-09-30 | 2021-09-30 | Intelligent belt adjusting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113847286A true CN113847286A (en) | 2021-12-28 |
| CN113847286B CN113847286B (en) | 2024-01-23 |
Family
ID=78977295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111158120.0A Active CN113847286B (en) | 2021-09-30 | 2021-09-30 | Intelligent belt adjusting device |
Country Status (1)
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| CN (1) | CN113847286B (en) |
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| CN206273730U (en) * | 2016-12-20 | 2017-06-23 | 山东科技大学 | A kind of hydraulic automatic tensioning device |
| CN206299626U (en) * | 2016-11-09 | 2017-07-04 | 大连冰山金属技术有限公司 | Low-loss bottom pouring type pouring machine hydraulic system |
| CN208103140U (en) * | 2017-12-31 | 2018-11-16 | 上海新建重型机械有限公司 | A kind of belt tension equipment and circular piling materials take-out |
| CN109230272A (en) * | 2018-08-31 | 2019-01-18 | 北部湾港防城港码头有限公司 | A kind of belt feeder hydraulic tensioning control device |
| CN210869685U (en) * | 2019-10-28 | 2020-06-30 | 熊艳军 | Flesh of fish flesh separator |
| CN111731776A (en) * | 2020-06-11 | 2020-10-02 | 陈永泽 | Conveying belt capable of freely adjusting conveying length |
-
2021
- 2021-09-30 CN CN202111158120.0A patent/CN113847286B/en active Active
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| US20050035654A1 (en) * | 2003-03-31 | 2005-02-17 | Komatsu Ltd. | Crawler track tension adjusting device |
| CN201074126Y (en) * | 2007-07-02 | 2008-06-18 | 徐州华宇电力设备制造有限公司 | Strap hydraulic tensioning device for belt conveyer |
| CN201390521Y (en) * | 2009-03-26 | 2010-01-27 | 江苏朝阳液压机械集团有限公司 | Rubber belt automatic control hydraulic tensioning device |
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| CN201559977U (en) * | 2009-12-01 | 2010-08-25 | 原平盛大实业有限公司 | Belt self-control tensioner of belt conveyer |
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| CN206142317U (en) * | 2016-09-20 | 2017-05-03 | 山西汾西矿业（集团）有限责任公司 | Belt conveyor belt tensioning automatic regulating apparatus |
| CN206299626U (en) * | 2016-11-09 | 2017-07-04 | 大连冰山金属技术有限公司 | Low-loss bottom pouring type pouring machine hydraulic system |
| CN206273730U (en) * | 2016-12-20 | 2017-06-23 | 山东科技大学 | A kind of hydraulic automatic tensioning device |
| CN208103140U (en) * | 2017-12-31 | 2018-11-16 | 上海新建重型机械有限公司 | A kind of belt tension equipment and circular piling materials take-out |
| CN109230272A (en) * | 2018-08-31 | 2019-01-18 | 北部湾港防城港码头有限公司 | A kind of belt feeder hydraulic tensioning control device |
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| CN111731776A (en) * | 2020-06-11 | 2020-10-02 | 陈永泽 | Conveying belt capable of freely adjusting conveying length |
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| Publication number | Publication date |
|---|---|
| CN113847286B (en) | 2024-01-23 |
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