CN113027842B - Servo synchronous ejection system - Google Patents

Servo synchronous ejection system Download PDF

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Publication number
CN113027842B
CN113027842B CN202110331516.4A CN202110331516A CN113027842B CN 113027842 B CN113027842 B CN 113027842B CN 202110331516 A CN202110331516 A CN 202110331516A CN 113027842 B CN113027842 B CN 113027842B
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China
Prior art keywords
ejection
piston
oil
cylinder
piston cavity
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CN202110331516.4A
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Chinese (zh)
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CN113027842A (en
Inventor
温怡彰
梁德成
邓耀顺
苏龙保
梁超寰
谈建豪
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Foshan Henglitai Machinery Co Ltd
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Foshan Henglitai Machinery Co Ltd
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Publication of CN113027842A publication Critical patent/CN113027842A/en
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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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/22—Synchronisation of the movement of two or more servomotors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
    • B28B13/04—Discharging the shaped articles
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/78—Control of multiple output members
    • F15B2211/782—Concurrent control, e.g. synchronisation of two or more actuators

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The invention discloses a servo synchronous ejection system, which comprises an ejection device bottom plate and a synchronous ejection device, wherein the synchronous ejection device comprises a master ejection cylinder and a slave ejection cylinder; the main ejection cylinder is internally provided with a first piston, a second piston, a first piston cavity, a second piston cavity and a third piston cavity; a third piston, a fourth piston cavity and a fifth piston cavity are arranged in the slave ejection oil cylinder; the effective areas of the second piston cavity, the third piston cavity and the fourth piston cavity on the horizontal section are equal; the first piston cavity is connected with the oil inlet pipe; and the fifth piston cavity of the slave ejection cylinder is connected with an oil return pipe. By adopting the embodiment, the synchronous lifting of different main ejection cylinders can be ensured, the synchronous movement of the main ejection cylinder and the auxiliary ejection cylinder in the same synchronous ejection device can be ensured, the control elements are fewer, the pipeline is simple, the lifting action is accurate and sensitive, and the ejection requirements of objects in different fields are met.

Description

Servo synchronous ejection system
Technical Field
The present disclosure relates to ejection systems, and particularly to a servo synchronous ejection system.
Background
In industry, it is often desirable to eject articles horizontally. In particular, in the ceramic press industry, it is desirable to eject the press formed green bricks from the press mold. The existing method often uses a mechanical connecting rod to press the hydraulic oil in a plurality of hydraulic cylinders into corresponding ejection cylinders at the same flow, and the method has the disadvantages of large occupied space, more parts and difficult maintenance. In addition, a plurality of servo proportional valves are adopted by part of machine types to control different ejection cylinders so as to ensure that the different ejection cylinders can synchronously act. This method has the following disadvantages:
(1) The servo proportional valve is relatively expensive.
(2) Each servo proportional valve needs a plurality of oil ways to realize control; if more servo proportional valves are used, more oil paths are correspondingly needed, and the complexity is increased.
(3) When the number of servo proportional valves is increased, each ejection oil cylinder is provided with a displacement sensor to provide a feedback signal, and each two valves need to be compared and the opening degree is adjusted once, so that the requirement of the whole synchronization process on a control algorithm is higher.
Disclosure of Invention
The servo synchronous ejection system can realize synchronous motion control of a plurality of ejection cylinders, has few control elements, simple pipelines and accurate and sensitive lifting action.
In order to solve the technical problems, the invention provides a servo synchronous ejection system, which comprises an ejection device bottom plate, wherein at least one set of synchronous ejection device is arranged in the ejection device bottom plate;
The synchronous ejection device comprises a main ejection cylinder and at least two auxiliary ejection cylinders matched with the main ejection cylinder;
a first piston and a second piston are arranged in the main ejection cylinder;
The second piston is arranged on the upper surface of the first piston, a piston rod is arranged at the top of the second piston, and the piston rod extends out of the top of the main ejection cylinder;
The main ejection cylinder comprises an upper cavity wall and a lower cavity wall, a step part is arranged at the joint of the upper cavity wall and the lower cavity wall, and the diameter of a circle where the upper cavity wall is positioned is smaller than that of a circle where the lower cavity wall is positioned;
The side surface of the second piston is abutted with the upper cavity wall, and the side surface of the first piston is abutted with the lower cavity wall;
The first piston and the second piston divide the interior of the main ejection cylinder into a first piston cavity, a second piston cavity and a third piston cavity;
A third piston is arranged in the slave ejection oil cylinder and divides the slave ejection oil cylinder into a fourth piston cavity and a fifth piston cavity; wherein,
The effective areas of the second piston cavity, the third piston cavity and the fourth piston cavity on the horizontal section are equal;
the second piston cavity is communicated with the fourth piston cavity of one slave ejection cylinder through a first oil passing pipe, and the third piston cavity is communicated with the fourth piston cavity of the other slave ejection cylinder through a second oil passing pipe;
the first piston cavity is connected with the oil inlet pipe; and the fifth piston cavity of the slave ejection cylinder is connected with an oil return pipe.
The oil supplementing mechanism comprises an oil supplementing pipeline, a first oil supplementing valve and a second oil supplementing valve, wherein the oil supplementing pipeline is connected with the first oil passing pipe and the second oil passing pipe; the first oil supplementing valve is used for controlling connection on-off between the oil supplementing pipeline and the first oil passing pipe, and the second oil supplementing valve is used for controlling connection on-off between the oil supplementing pipeline and the second oil passing pipe.
As an improvement of the scheme, at least two sets of synchronous liftout devices are arranged in the bottom plate of the liftout device, and oil inlet pipes of each set of synchronous liftout devices are controlled by corresponding servo proportional valves.
As an improvement of the scheme, a displacement sensor is correspondingly arranged on the outer side of a piston rod of the main ejection cylinder.
As an improvement of the scheme, the first piston cavity is connected with a first output oil port of the servo proportional valve; and the fifth piston cavity is connected with a second oil outlet of the servo proportional valve.
As an improvement of the scheme, the two auxiliary ejection cylinders are arranged in a triangle with the main ejection cylinder.
As an improvement of the scheme, the main ejection cylinder is also provided with a first interface communicated with the first piston cavity, a second interface communicated with the second piston cavity and a third interface communicated with the third piston cavity.
As an improvement of the scheme, a position measuring cylinder is further arranged in the bottom plate of the ejection device.
As an improvement of the scheme, the servo synchronous ejection system further comprises an auxiliary ejection cylinder arranged between the two sets of synchronous ejection devices.
The implementation of the invention has the following beneficial effects:
By adopting the embodiment, the synchronous lifting of different main ejection cylinders can be ensured, the synchronous movement of the main ejection cylinder and the auxiliary ejection cylinder in the same synchronous ejection device can be ensured, the control elements are fewer, the pipeline is simple, the lifting action is accurate and sensitive, and the ejection requirements of objects in different fields are met. For the ceramic press field, the large-area adobe can be driven by a plurality of sets of synchronous ejection devices together, so that the production requirement of the existing large-area integrated ceramic tile is met. In addition, the structure can enable the green bricks to horizontally and stably exit the die, and improve the quality of the green bricks.
Drawings
FIG. 1 is a schematic top view of a servo-synchronous ejection system according to a second embodiment of the present invention;
FIG. 2 is a schematic diagram of a first embodiment of a servo-synchronized ejection system of the present invention;
FIG. 3 is a schematic diagram of a second embodiment of a servo-synchronized ejection system of the present invention;
fig. 4 is a schematic view of a setting position of an auxiliary ejection cylinder according to a second embodiment of the present invention;
Fig. 5 is a schematic top view of a servo synchronous ejection system according to a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent. It is only stated that the terms of orientation such as up, down, left, right, front, back, inner, outer, etc. used in this document or the imminent present invention, are used only with reference to the drawings of the present invention, and are not meant to be limiting in any way.
As shown in fig. 1 and 2, a first embodiment of the present invention provides a servo synchronous ejection system, which includes an ejector bottom plate 1, wherein at least one set of synchronous ejectors 2 are arranged in the ejector bottom plate 1;
The synchronous ejection device 2 comprises a main ejection cylinder 21 and at least two auxiliary ejection cylinders 22 matched with the main ejection cylinder 21;
a first piston 211 and a second piston 212 are arranged in the main ejection cylinder 21,
The second piston 212 is arranged on the upper surface of the first piston 211, a piston rod 219 is arranged at the top of the second piston 212, and the piston rod 219 extends out from the top of the main ejection cylinder 21;
the main ejection cylinder 21 comprises an upper cavity wall 21a and a lower cavity wall 21b, wherein a step part 21c is arranged at the joint of the upper cavity wall 21a and the lower cavity wall 21b, and the diameter of a circle where the upper cavity wall 21a is positioned is smaller than the diameter of a circle where the lower cavity wall 21b is positioned;
the side surface of the second piston 212 is abutted against the upper chamber wall 21a, and the side surface of the first piston 211 is abutted against the lower chamber wall 21 b;
The first piston 211 and the second piston 212 divide the interior of the main ejection cylinder 21 into a first piston chamber 213, a second piston chamber 214, and a third piston chamber 215;
A third piston 221 is arranged in the slave ejection cylinder 22, and the third piston 221 divides the slave ejection cylinder 22 into a fourth piston chamber 222 and a fifth piston chamber 223; wherein,
The effective areas of the second piston chamber 214, the third piston chamber 215 and the fourth piston chamber 222 are equal in horizontal section; that is, when the first, second and third piston chambers 211, 212 and 215 move a predetermined distance, the volume changes of the second, third and fourth piston chambers 214, 215 and 222 are the same.
The second piston cavity 214 is communicated with the fourth piston cavity 222 of the one slave ejection cylinder 22 through a first oil passing pipe 23, and the third piston cavity 215 is communicated with the fourth piston cavity 222 of the other slave ejection cylinder 22 through a second oil passing pipe 24;
The first piston chamber 213 is connected with the oil inlet pipe 25; the fifth piston chamber 223 of the slave lift cylinder 22 is connected to the return line 26. The main ejection cylinder 21 is further provided with a first interface 216 communicated with the first piston cavity 213, a second interface 217 communicated with the second piston cavity 214, and a third interface 218 communicated with the third piston cavity 215.
The working principle of the invention is as follows: when synchronous lifting is required, hydraulic oil flows into the first piston cavity 213 from the oil inlet pipe 25, the first piston 211 is pushed to move upwards, and the second piston 212 moves upwards synchronously with the first piston; during the synchronous upward movement of the first piston 211 and the second piston 212, the space of the second piston chamber 214 and the third piston chamber 215 is simultaneously reduced, and the hydraulic oil in the second piston chamber 214 and the third piston chamber 215 flows into the different fourth piston chambers 222 of the slave lift cylinder 22 through the first oil passing pipe 23 and the second oil passing pipe 24, respectively. Since the effective areas of the second, third and fourth piston chambers 214, 215 and 222 are equal in horizontal cross section, the piston rod 219 of the master ejector cylinder 21 and the piston rod of the slave ejector cylinder 22 can be ensured to move synchronously. When the synchronous descent is required, the hydraulic oil flows into the fifth piston chamber 223 from the oil return pipe 26, flows out of the first piston chamber 213 through the oil inlet pipe 25, and the main ejector cylinder 21 and the slave ejector cylinder 22 start to descend synchronously.
By adopting the scheme, the synchronous movement of the master ejection cylinder 21 and the slave ejection cylinder 22 can be ensured, the control elements are few, the pipeline is simple, the lifting action is accurate and sensitive, and the ejection requirements of objects in different fields are met. For the ceramic press field, the above-mentioned structure can make the adobe horizontal stable withdraw from the mould, improves adobe quality.
Preferably, the system further comprises an oil supplementing mechanism comprising an oil supplementing pipeline 27, a first oil supplementing valve 28 and a second oil supplementing valve 29, wherein the oil supplementing pipeline 27 is connected with the first oil passing pipe 23 and the second oil passing pipe 24; the first oil compensating valve 28 is used for controlling connection and disconnection between the oil compensating pipeline 27 and the first oil passing pipe 23, and the second oil compensating valve 29 is used for controlling connection and disconnection between the oil compensating pipeline 27 and the second oil passing pipe 24. In normal operation, the first oil compensating valve 28 and the second oil compensating valve 29 are both in a closed state. When the hydraulic components used for synchronous action such as the first oil passing pipe 23 or the second oil passing pipe 24 leak, and the actions of different slave ejection cylinders 22 are inconsistent, the corresponding first oil compensating valve 28 or second oil compensating valve 29 can be opened, and a certain amount of hydraulic oil is added or discharged into the first oil passing pipe 23 or the second oil passing pipe 24, so that the actions of different slave ejection cylinders 22 are consistent again.
According to a second embodiment of the present invention, as shown in fig. 3, the difference from the first embodiment is that at least two sets of synchronous lifters 2 are provided in the bottom plate 1 of the lifters, and the oil inlet pipe 25 of each set of synchronous lifters 2 is controlled by a corresponding servo proportional valve 3.
The outer side of the piston rod 219 of the main ejection cylinder 21 is correspondingly provided with a displacement sensor 4. The first piston cavity 213 is connected with a first oil outlet port 31 of the servo proportional valve 3; the fifth piston chamber 223 is connected to the second output port 32 of the servo proportional valve 3. The servo proportional valves 3 on different synchronous liftout devices 2 continuously adjust the opening of the valve ports according to the feedback data of the corresponding displacement sensors 4 so as to control the lifting speeds of different main liftout cylinders 21 and realize the synchronous lifting control of different driving vehicle cylinders. The servo proportional valve 3 can also control the first output oil port 31 and the second output oil port 32 of the servo proportional valve to be communicated with the hydraulic input end and the oil return end so as to realize ascending and descending switching of the main ejection oil cylinder 21 and the auxiliary ejection oil cylinder 22.
Preferably, the two slave ejection cylinders 22 are arranged in a triangle with the master ejection cylinder 21.
By adopting the embodiment, the synchronous lifting of the main ejection cylinders 21 and the auxiliary ejection cylinders 22 in the same synchronous ejection device 2 can be ensured, the control elements are few, the pipeline is simple, the lifting action is accurate and sensitive, and the ejection requirements of objects in different fields are met. For the ceramic press field, the large-area green bricks can be driven by a plurality of sets of synchronous ejection devices 2 together, so that the production requirements of the existing large-area integrated ceramic tiles are met. In addition, the structure can enable the green bricks to horizontally and stably exit the die, and improve the quality of the green bricks.
Preferably, as shown in fig. 4, the servo synchronous ejection system further comprises an auxiliary ejection cylinder arranged between the two sets of synchronous ejection devices. The auxiliary ejection cylinder is controlled by an independent hydraulic system, and is slowly lifted to be abutted against the object to be ejected before the main ejection cylinder 21 and the auxiliary ejection cylinder 22 are lifted. Then the main ejection cylinder 21 and the auxiliary ejection cylinder 22 are lifted together to play a role in supporting the central position of the green brick and preventing damage caused by overlarge stress on two ends in the green brick lifting process.
As shown in fig. 5, the third embodiment according to the present invention is different from the first and second embodiments in that it further includes a position measuring cylinder 5 provided in the ejector base plate 1. The position measuring cylinder 5 is abutted to the bottom of the ejected object and keeps a certain lifting pressure, so that a piston rod of the position measuring cylinder is always abutted to the ejected object in the process of ejecting the object. According to the displacement of the piston rod, the lifting distance of the object can be accurately measured.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.

Claims (7)

1. The servo synchronous ejection system is characterized by comprising an ejection device bottom plate, wherein at least one set of synchronous ejection device is arranged in the ejection device bottom plate;
The synchronous ejection device comprises a main ejection cylinder and at least two auxiliary ejection cylinders matched with the main ejection cylinder;
a first piston and a second piston are arranged in the main ejection cylinder;
The second piston is arranged on the upper surface of the first piston, a piston rod is arranged at the top of the second piston, and the piston rod extends out of the top of the main ejection cylinder;
The main ejection cylinder comprises an upper cavity wall and a lower cavity wall, a step part is arranged at the joint of the upper cavity wall and the lower cavity wall, and the diameter of a circle where the upper cavity wall is positioned is smaller than that of a circle where the lower cavity wall is positioned;
The side surface of the second piston is abutted with the upper cavity wall, and the side surface of the first piston is abutted with the lower cavity wall;
The first piston and the second piston divide the interior of the main ejection cylinder into a first piston cavity, a second piston cavity and a third piston cavity;
A third piston is arranged in the slave ejection oil cylinder and divides the slave ejection oil cylinder into a fourth piston cavity and a fifth piston cavity; wherein,
The effective areas of the second piston cavity, the third piston cavity and the fourth piston cavity on the horizontal section are equal;
the second piston cavity is communicated with the fourth piston cavity of one slave ejection cylinder through a first oil passing pipe, and the third piston cavity is communicated with the fourth piston cavity of the other slave ejection cylinder through a second oil passing pipe;
The first piston cavity is connected with the oil inlet pipe; the fifth piston cavity of the slave ejection cylinder is connected with an oil return pipe;
the oil supplementing mechanism comprises an oil supplementing pipeline, a first oil supplementing valve and a second oil supplementing valve, and the oil supplementing pipeline is connected with the first oil passing pipe and the second oil passing pipe; the first oil supplementing valve is used for controlling connection and disconnection between the oil supplementing pipeline and the first oil passing pipe, and the second oil supplementing valve is used for controlling connection and disconnection between the oil supplementing pipeline and the second oil passing pipe;
The main ejection cylinder is also provided with a first interface communicated with the first piston cavity, a second interface communicated with the second piston cavity and a third interface communicated with the third piston cavity.
2. The servo synchronous ejection system of claim 1, wherein at least two sets of synchronous ejection devices are arranged in the ejection device base plate, and oil inlet pipes of each set of synchronous ejection devices are controlled by corresponding servo proportional valves.
3. The servo synchronous ejection system of claim 2, wherein a displacement sensor is correspondingly arranged on the outer side of the piston rod of the main ejection cylinder.
4. The servo-synchronized ejection system of claim 3, wherein the first piston chamber is connected to a first output port of the servo proportional valve; and the fifth piston cavity is connected with a second oil outlet of the servo proportional valve.
5. The servo-synchronized ejection system of claim 3, wherein the slave ejection cylinders are arranged in a triangle with the master ejection cylinder.
6. The servo-synchronized ejection system of claim 1, wherein a position measurement cylinder is further provided in the ejector base plate.
7. The servo-actuated synchronous ejection system of claim 5, further comprising an auxiliary ejection cylinder disposed between the two sets of synchronous ejection devices.
CN202110331516.4A 2021-03-29 2021-03-29 Servo synchronous ejection system Active CN113027842B (en)

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Application Number Priority Date Filing Date Title
CN202110331516.4A CN113027842B (en) 2021-03-29 2021-03-29 Servo synchronous ejection system

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Application Number Priority Date Filing Date Title
CN202110331516.4A CN113027842B (en) 2021-03-29 2021-03-29 Servo synchronous ejection system

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CN113027842B true CN113027842B (en) 2024-06-07

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1411339A (en) * 1972-02-17 1975-10-22 Inouye Shokai Kk Reciprocating pump
JP2006153113A (en) * 2004-11-29 2006-06-15 Mitsubishi Heavy Ind Ltd Valve built-in type hydraulic cylinder
CN202071175U (en) * 2011-03-11 2011-12-14 佛山市恒力泰机械有限公司 Multi-cylinder synchronization device and hydraulic moulding equipment provided with device
CN103148046A (en) * 2013-03-14 2013-06-12 西安交通大学 Alternating current servo direct-drive supercharged three-layer piston electrohydraulic cylinder and supercharging method
CN103433455A (en) * 2013-08-26 2013-12-11 广东伊之密精密机械股份有限公司 Circulating pressure supplement type cartridge valve
CN205937272U (en) * 2016-07-06 2017-02-08 秦皇岛秦冶重工有限公司 Distributing device chute hydraulic pressure closed loop ratio control system that fascinates
CN108644093A (en) * 2018-05-18 2018-10-12 东莞海特帕沃液压科技有限公司 A kind of hydraulic drive air compressor
CN212177544U (en) * 2019-10-22 2020-12-18 佛山市恒力泰机械有限公司 Synchronous control system of multi-cylinder and multi-valve
CN215333699U (en) * 2021-03-29 2021-12-28 佛山市恒力泰机械有限公司 Servo synchronous ejection system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1411339A (en) * 1972-02-17 1975-10-22 Inouye Shokai Kk Reciprocating pump
JP2006153113A (en) * 2004-11-29 2006-06-15 Mitsubishi Heavy Ind Ltd Valve built-in type hydraulic cylinder
CN202071175U (en) * 2011-03-11 2011-12-14 佛山市恒力泰机械有限公司 Multi-cylinder synchronization device and hydraulic moulding equipment provided with device
CN103148046A (en) * 2013-03-14 2013-06-12 西安交通大学 Alternating current servo direct-drive supercharged three-layer piston electrohydraulic cylinder and supercharging method
CN103433455A (en) * 2013-08-26 2013-12-11 广东伊之密精密机械股份有限公司 Circulating pressure supplement type cartridge valve
CN205937272U (en) * 2016-07-06 2017-02-08 秦皇岛秦冶重工有限公司 Distributing device chute hydraulic pressure closed loop ratio control system that fascinates
CN108644093A (en) * 2018-05-18 2018-10-12 东莞海特帕沃液压科技有限公司 A kind of hydraulic drive air compressor
CN212177544U (en) * 2019-10-22 2020-12-18 佛山市恒力泰机械有限公司 Synchronous control system of multi-cylinder and multi-valve
CN215333699U (en) * 2021-03-29 2021-12-28 佛山市恒力泰机械有限公司 Servo synchronous ejection system

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