CN215908140U - Hydraulic system and rotary kiln using same - Google Patents
Hydraulic system and rotary kiln using same Download PDFInfo
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- CN215908140U CN215908140U CN202122018686.5U CN202122018686U CN215908140U CN 215908140 U CN215908140 U CN 215908140U CN 202122018686 U CN202122018686 U CN 202122018686U CN 215908140 U CN215908140 U CN 215908140U
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Abstract
The application relates to a hydraulic system and a rotary kiln using the hydraulic system, relating to the field of hydraulic equipment and comprising a cylinder body and a piston arranged in the cylinder body, wherein the piston divides the interior of the cylinder body into a rodless cavity and a rod cavity, and further comprising a first oil path, a second oil path, an oil inlet path, an air release path, an adjusting oil path and an oil tank; a first oil passage: one end is communicated with the rodless cavity; a second oil passage: one end is communicated with the rod cavity; an oil inlet path: an oil pump is installed on the oil inlet oil way, one end of the oil inlet oil way is communicated with the oil tank, and the other end of the oil inlet oil way is communicated with the first oil way; the air leakage path is as follows: a valve is arranged on the air escape passage, one end of the air escape passage is communicated with the second oil way, and the other end of the air escape passage is communicated with the oil tank; adjusting an oil way: and a valve is also arranged on the oil adjusting path, one end of the oil adjusting path is communicated with the oil inlet path, the other end of the oil adjusting path is communicated with the air release path, and the valve on the air release path is positioned on one side of the oil adjusting path, which is far away from the cylinder body. When this application had the sealed inefficacy of piston, the telescopic link can continue to accomplish the effect that stretches out.
Description
Technical Field
The application relates to the field of hydraulic equipment, in particular to a hydraulic system and a rotary kiln using the same.
Background
The hydraulic cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has simple structure and reliable operation. In the related art, the reciprocating motion of the object is generally achieved by using a hydraulic cylinder.
The hydraulic cylinder comprises a cylinder body and a piston located inside the cylinder body, a telescopic rod is fixedly connected to one side face of the piston, and one end, far away from the piston, of the telescopic rod extends out of the cylinder body. The piston divides the cylinder into a rodless cavity and a rod cavity which are not communicated with each other. The hydraulic cylinder is a single-acting cylinder, high-pressure oil is input into a rodless cavity, so that the piston and the telescopic rod can be pushed to move towards the direction far away from the inside of the cylinder body, and in the process, the telescopic rod can push articles to move towards the direction far away from the inside of the cylinder body.
In view of the above-mentioned related art, the inventor believes that when the sealing of the piston fails, the rodless chamber and the rod chamber are communicated with each other, and at this time, it is difficult to ensure the normal extension of the telescopic rod by continuously inputting high-pressure oil into the rodless chamber.
SUMMERY OF THE UTILITY MODEL
In order to facilitate sealing failure of the piston, the telescopic rod can continue to extend, and the application provides a hydraulic system and a rotary kiln using the hydraulic system.
In a first aspect, the hydraulic system provided by the present application adopts the following technical scheme:
a hydraulic system comprises a cylinder body and a piston arranged in the cylinder body, wherein a telescopic rod extending out of the cylinder body is fixedly connected to one side face of the piston, the piston divides the inner part of the cylinder body into a rodless cavity and a rod cavity, and the hydraulic system also comprises a first oil path, a second oil path, an oil inlet path, an air leakage path, an adjusting oil path and an oil tank;
a first oil passage: one end of the connecting rod is communicated with the rodless cavity;
a second oil passage: one end of the rod cavity is communicated with the rod cavity;
an oil inlet path: an oil pump is mounted on the oil inlet oil way, one end of the oil inlet oil way is communicated with the oil tank, and the other end of the oil inlet oil way is communicated with the first oil way;
the air leakage path is as follows: a valve is arranged on the air leakage passage, one end of the air leakage passage is communicated with the second oil way, and the other end of the air leakage passage is communicated with the oil tank;
adjusting an oil way: the valve is also installed on the oil adjusting way, one end of the oil adjusting way is communicated with the oil inlet way, the other end of the oil adjusting way is communicated with the air leakage passage, and the valve on the air leakage passage is located on the oil adjusting way far away from one side of the cylinder body.
By adopting the technical scheme, when an object needs to be moved, the object is connected with the telescopic rod, the valve on the air leakage passage is opened, and the valve on the adjusting oil way is closed; then starting an oil pump, pumping pressure oil in an oil tank into the rodless cavity along the oil inlet oil path and the first oil path through the oil pump, pushing the piston and the telescopic rod to move by the pressure oil entering the rodless cavity, and pushing the object to move in a direction far away from the cylinder body by the telescopic rod; in the process, air in the rod cavity enters the oil tank along the second oil path and the air leakage path.
When piston department takes place to leak, when leading to there being pole chamber and no pole chamber intercommunication, close the valve on the passageway of losing heart, open the valve on the regulation oil circuit, pressure oil in the oil tank is not only gone into to no pole intracavity pump this moment, pressure oil in the oil tank is along the oil feed oil circuit simultaneously, the pump income is gone into to regulation oil circuit and second oil circuit to there being pole intracavity, because the effective area of acting in no pole chamber is greater than there being the effective area of acting in pole chamber, thereby piston and telescopic link can continue to move and accomplish the continuation of telescopic link and stretch out, so be convenient for the article continue to the direction motion of keeping away from the cylinder body.
Preferably, the oil inlet oil path is connected with an oil return oil path, the other end of the oil return oil path is communicated with the oil tank, the oil return oil path is provided with an electromagnetic ball valve, the oil inlet oil path is provided with a switch valve, and the telescopic rod is upwards arranged towards the direction far away from the piston.
By adopting the technical scheme, when the piston is sealed normally, the switch valve is opened, and pressure oil is pumped into the rodless cavity from the oil tank through the oil pump, so that the telescopic rod is normally extended; when the object needs to descend, the switch valve is closed, meanwhile, the valve on the air leakage passage is kept in an open state, the valve on the adjusting oil way is kept in a closed state, at the moment, the telescopic rod moves towards the inside of the cylinder body under the influence of the gravity of the object, and the pressure oil in the rodless cavity flows back into the oil tank along the first oil way and the oil return way. Therefore, the resetting of the telescopic rod is completed without applying other external force.
Preferably, a needle-type throttle valve is installed on the oil return path.
By adopting the technical scheme, the return oil flow of the return oil way can be adjusted by adjusting the needle-shaped throttle valve, so that the speed of the telescopic rod moving towards the inside of the cylinder body is adjusted, and the falling speed of an object is convenient to adjust.
Preferably, a first filter and a pressure difference switch are installed on the oil return path, and the pressure difference switch and the first filter are arranged in parallel.
Through adopting above-mentioned technical scheme, filter one can filter the pressure oil that flows back to the oil tank along oil return oil circuit, and can detect whether normal circulation pressure oil of filter department through the pressure difference switch, when the filter blocks up, the pressure difference switch can send out the police dispatch newspaper.
Preferably, the oil inlet path is connected with a pressurizing oil path, and the pressurizing oil path is provided with an external manual pressurizing pump and a valve for controlling the pressurizing oil path to open and close.
By adopting the technical scheme, when pressure oil is pumped into the cylinder body, the valve of the pressurizing oil way is opened, the pressure of the pressure oil pumped into the cylinder body is increased through the external manual pressurizing pump, and the telescopic rod can conveniently push the object to quickly rise.
Preferably, a check valve is installed on the pressurized oil path and located on one side, close to the oil inlet path, of the external manual pressurizing pump.
By adopting the technical scheme, the situation that the pressure oil of the oil inlet oil way is pumped into the external manual pressurizing pump along the pressurizing oil way is limited.
Preferably, the oil inlet oil way is connected with an overflow oil way, the other end of the overflow oil way is communicated with the oil tank, and the overflow oil way is provided with an overflow valve.
By adopting the technical scheme, when the oil pressure of the oil inlet oil way is overlarge, part of pressure oil of the oil inlet oil way flows back to the oil tank along the overflow oil way, and the overflow valve plays a role in safety protection on the whole hydraulic system.
Preferably, the oil tank is connected with a heater and a temperature sensor for monitoring the temperature of the oil, the temperature sensor is electrically connected with a central controller, and the central controller is electrically connected with the heater.
Through adopting above-mentioned technical scheme, for the convenience of the flow of pressure oil, the heater heats the pressure oil in the oil tank, and temperature sensor monitors the temperature of pressure oil in the oil tank to give central controller with the signal feedback, central controller control heater switch need not artifical monitoring, comparatively uses manpower sparingly.
Preferably, a gas-isolated accumulator is connected to the first oil passage.
Through adopting above-mentioned technical scheme, the gas-insulated energy storage ware is convenient for supply the flow of oil pump, stabilizes hydraulic system's pressure simultaneously.
In a second aspect, the application provides a rotary kiln using the hydraulic system, which adopts the following technical scheme:
according to the hydraulic system, one end of the telescopic rod is connected with the rotary kiln.
Through adopting above-mentioned technical scheme, promote the rotary kiln through the pneumatic cylinder and accomplish and go up and down, when the rotary kiln takes place unusual drunkenness at the in-process that rises, the valve on the steerable passageway of leaking is closed, and the valve on the control adjusting oil circuit is opened for the telescopic link continues to accomplish and stretches out, and then continues to promote the rotary kiln and accomplish and rise.
In summary, the present application includes at least one of the following beneficial technical effects:
1. when the sealing of the piston fails, the telescopic rod can continue to extend out, so that an object connected with the telescopic rod can continue to move in a direction far away from the cylinder body;
2. the oil return flow of the oil return oil way is adjusted through the adjusting needle type throttle valve, so that the descending speed of an object connected with the telescopic rod is adjusted;
3. the overflow valve plays a role in safety protection for the whole hydraulic system.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a hydraulic system embodied in an embodiment of the present application.
Fig. 2 is a schematic diagram of an oil return path according to an embodiment of the present application.
Description of reference numerals: 1. a cylinder body; 11. a piston; 12. a telescopic rod; 13. a rodless cavity; 14. a rod cavity; 2. a first oil passage; 21. a first stop valve; 3. a second oil passage; 4. a control system; 41. an oil tank; 411. an air filter; 412. a liquid level meter; 413. an electronic liquid level controller; 414. a thermometer; 415. a heater; 416. a temperature sensor; 42. an oil inlet path; 421. an on-off valve; 422. a plunger metering pump; 423. a second stop valve; 424. a second filter; 43. an air escape path; 431. a third stop valve; 44. an oil return path; 441. a first filter; 442. a needle-type throttle valve; 443. an electromagnetic ball valve; 444. a pressure difference switch; 45. adjusting an oil way; 451. a stop valve IV; 46. an overflow oil path; 461. an overflow valve; 47. a pressurized oil path; 471. a fifth stop valve; 472. a one-way valve; 473. an external manual pressure pump; 5. a pressure gauge; 6. a gas-isolated accumulator.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
The embodiment of the application discloses a hydraulic system. Referring to fig. 1, hydraulic system includes the pneumatic cylinder, and the pneumatic cylinder includes cylinder body 1, is equipped with piston 11 in the cylinder body 1, and a side fixedly connected with telescopic link 12 of piston 11, the one end that telescopic link 12 kept away from piston 11 stretches out cylinder body 1. The piston 11 divides the cylinder body 1 into a rodless cavity 13 and a rod cavity 14 which are not communicated with each other, the rodless cavity 13 is communicated with a first oil way 2, a working oil port A is arranged at one end, far away from the rodless cavity 13, of the first oil way 2, and a first stop valve 21 is installed on the first oil way 2. The rod cavity 14 is communicated with a second oil path 3, and one end of the second oil path 3, which is far away from the rod cavity 14, is provided with a working oil port B. And a control system 4 is connected between the working oil port A and the working oil port B.
Referring to fig. 1 and 2, the control system 4 includes a tank 41, an oil-intake passage 42, an air-release passage 43, an oil-return passage 44, a regulation passage 45, and an overflow passage 46.
One end of the oil inlet passage 42 is communicated with the oil tank 41, and the other end is communicated with the working oil port a. The oil inlet path 42 is provided with a switch valve 421, an oil pump and a stop valve II 423, and the switch valve 421, the oil pump and the stop valve II 423 are sequentially arranged from the oil tank 41 towards the direction close to the working oil port A. The oil pump includes two plunger formula measuring pumps 422, and two plunger formula measuring pumps 422 are parallelly connected to be set up.
One end of the air release passage 43 communicates with the oil tank 41, and the other end communicates with the working port B. A third check valve 431 is installed in the air release passage 43.
One end of the oil return path 44 is communicated with the oil tank 41, the other end is communicated with the oil inlet path 42, and the joint of the oil return path 44 and the oil inlet path 42 is positioned between the second stop valve 423 and the oil pump. The oil return path 44 is provided with a first filter 441, a needle type throttle valve 442 and an electromagnetic ball valve 443, and the first filter 44 is connected with a pressure difference switch 444 in parallel.
One end of the adjusting oil path 45 is communicated with the oil inlet path 42, and the other end is communicated with the air discharge path 43. The connection position of the adjusting oil path 45 and the oil inlet path 42 is located between the second stop valve 423 and the working oil port A, the connection position of the adjusting oil path 45 and the air release path 43 is located between the third stop valve 431 and the working oil port B, and the fourth stop valve 451 is installed on the adjusting oil path 45.
One end of the overflow oil path 46 communicates with the oil-in oil path 42, and the other end communicates with the oil tank 41. The connection position of the overflow oil path 46 and the oil inlet oil path 42 is positioned between the second stop valve 423 and the oil pump, and the overflow oil path 46 is provided with an overflow valve 461 and a pressure gauge 5. The overflow valve 461 is in a normally closed state, when the pressure of the oil inlet path 42 is too high, the overflow valve 461 is opened, and the redundant flow of oil in the oil inlet path 42 flows back to the oil tank 41 along the overflow path 46, so that a certain safety protection effect is achieved.
The telescopic rod 12 in the present application is arranged upwards towards the direction away from the piston 11, and the object is connected with the telescopic rod 12.
When the object needs to be lifted vertically, the electromagnetic ball valve 443 and the fourth stop valve 451 are closed, the first stop valve 21, the second stop valve 423, the third stop valve 431 and the switch valve 421 are opened, then the two plunger type metering pumps 422 are started, and the pressure oil in the oil tank 41 is pumped into the rodless cavity 13 along the oil inlet oil path 42 and the first oil path 2 in sequence. The piston 11 drives the telescopic rod 12 to move towards the outside of the cylinder body 1 under the action of the pressure oil pumped in, and in the process, the air in the rod cavity 14 is pushed into the oil tank 41 along the second oil path 3 and the air release path 43, so that the object pushed by the telescopic rod 12 can smoothly ascend.
When the workpiece needs to be vertically lowered, the on-off valve 421 is closed, the electromagnetic ball valve 443 is opened, the first stop valve 21, the second stop valve 423 and the third stop valve 431 are kept in the opened state, and the fourth stop valve 451 is kept in the closed state. At the moment, the object pushes the telescopic rod 12 downwards under the influence of the self gravity, the telescopic rod 12 moves towards the direction inside the cylinder body 1, and meanwhile, the telescopic rod 12 pushes the piston 11; at this time, the pressure oil in the rod-less chamber 13 flows back to the oil tank 41 along the first oil passage 2 and the return oil passage 44. In this process, the oil return flow of the oil return path 44 can be controlled by adjusting the needle-type throttle 442, and the moving speed of the piston 11 and the telescopic rod 12 can be adjusted by controlling the oil return flow, thereby adjusting the descending speed of the object.
During the process that the pressure oil in the rodless cavity 13 flows back to the oil tank 41 through the filter I441, the filter I441 can filter impurities in the pressure oil. When the filter is blocked and the pressure oil is not easy to normally flow, the pressure difference switch 444 connected with the first filter 441 can give an alarm.
When the sealing of the piston 11 fails during the ascending of the object, i.e. the rodless chamber 13 and the rod chamber 14 are communicated with each other, it is difficult for the object to continue to complete the ascending. To solve this problem, the on-off valve 421, the first shut-off valve 21, and the second shut-off valve 423 are kept open, and the electromagnetic ball valve 443 is kept closed, and then the third shut-off valve 431 is closed and the fourth shut-off valve 451 is opened.
At this time, the oil tank 41 pumps pressure oil into the rodless chamber 13 along the oil inlet passage 42 and the first oil passage 2, and simultaneously, the oil tank 41 pumps pressure oil into the rod chamber 14 along the oil inlet passage 42, the adjusting passage 45, and the second oil passage 3. The pressure input into the rodless cavity 13 and the pressure input into the rod cavity 14 are equal, but the effective acting area of the rodless cavity 13 is larger than that of the rod cavity 14, so that the thrust of the rodless cavity 13 is larger than that of the rod cavity 14, and the piston 11 and the telescopic rod 12 continuously rise to realize the continuous rising of the object. In this process, the pressure oil flowing from the rodless chamber 13 into the rod chamber 14 again enters the rodless chamber 13 along the second oil passage 3, the regulation oil passage 45, and the first oil passage 2.
The oil inlet oil path 42 is connected with a pressurizing oil path 47, the joint of the pressurizing oil path 47 and the oil inlet oil path 42 is close to the oil pump, and the joint of the pressurizing oil path 47 and the oil inlet oil path 42 is positioned on one side of the oil pump, which is far away from the switch valve 421. The pressure oil path 47 is provided with a stop valve five 471, a one-way valve 472 and an external manual pressure pump 473, and the stop valve five 471, the one-way valve 472 and the external manual pressure pump 473 are sequentially arranged in a direction away from the oil inlet oil path 42.
When high-pressure oil is pumped into the cylinder body 1 through the oil pump, the stop valve penta 471 can be selectively opened, and the pressure of the pressure oil pumped into the cylinder body 1 is further increased through the external manual pressurizing pump 473, so that the objects can rise rapidly.
One end of the oil inlet path 42, which is communicated with the oil tank 41, extends into the oil tank 41 and is connected with a second filter 424, and the second filter 424 can filter oil entering the oil inlet path 42 from the oil tank 41.
An air filter 411, a liquid level meter 412, an electronic liquid level controller 413, a thermometer 414 and an oil drain valve are connected to the oil tank 41. The air filter 411 is used for filtering impurities in the air when the oil tank 41 is ventilated with the outside, and the liquid level meter 412 is used for measuring the height of the oil level in the oil tank 41. The electronic liquid level controller 413 is connected to a central controller, and the electronic liquid level controller 413 is used for monitoring the height of the oil level and feeding back signals to the central controller. The temperature gauge 414 facilitates the operator to observe the temperature of the pressurized oil in the oil tank 41.
In order to facilitate the oil in the oil tank 41 to have good fluidity, a heater 415 for heating the oil is connected to the oil tank 41, and a temperature sensor 416 for monitoring the temperature of the oil is connected to the oil tank 41. The temperature sensor 416 is electrically connected to a central controller, which is electrically connected to the heater 415. The central controller controls the on/off of the heater 415 according to a signal fed back from the temperature sensor 416.
The first oil way 2 is connected with a gas isolation type energy accumulator 6, so that the pressure of the system 4 is stably controlled while the flow of the oil pump is supplemented. One end that gas isolation formula energy storage ware 6 is connected with first oil circuit 2 is connected with the manometer 5 that is used for monitoring the oil pressure, installs the valve between manometer 5 and the gas isolation formula energy storage ware 6, through the switch valve, can control the switch of manometer 5.
The article of this application embodiment is the rotary kiln, and the pneumatic cylinder is used for driving the lift of rotary kiln. When the hydraulic cylinder pushes the rotary kiln to rise, the rotary kiln generates abnormal movement, namely the piston 11 leaks, and the control system 4 can be used for ensuring that the rotary kiln finishes normal rising.
The implementation principle of a hydraulic system in the embodiment of the application is as follows: when the rotary kiln needs to be pushed to ascend, the electromagnetic ball valve 443 and the fourth stop valve 451 are closed, the first stop valve 21, the second stop valve 423, the third stop valve 431 and the switch valve 421 are opened, the two plunger type metering pumps 422 are started, the pressure oil in the oil tank 41 is pumped into the rodless cavity 13 along the oil inlet oil path 42 and the first oil path 2 in sequence, and at the moment, the telescopic rod 12 pushes the rotary kiln to ascend normally.
When the rotary kiln is abnormally moved, that is, the sealing of the piston 11 is failed, the on-off valve 421, the first stop valve 21 and the second stop valve 423 are kept opened, the electromagnetic ball valve 443 is kept closed, the third stop valve 431 is closed, and the fourth stop valve 451 is opened. At this time, the telescopic rod 12 can continuously push the rotary kiln to continuously finish the rising.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The utility model provides a hydraulic system, includes cylinder body (1) and piston (11) of setting in cylinder body (1), a side fixedly connected with of piston (11) stretches out telescopic link (12) of cylinder body (1), piston (11) will cylinder body (1) internal partitioning becomes rodless chamber (13) and has pole chamber (14), its characterized in that: the oil pump also comprises a first oil way (2), a second oil way (3), an oil inlet oil way (42), an air leakage passage (43), an adjusting oil way (45) and an oil tank (41);
first oil passage (2): one end of the connecting rod is communicated with the rodless cavity (13);
second oil passage (3): one end of the rod cavity is communicated with the rod cavity (14);
oil inlet path (42): an oil pump is mounted on the oil inlet oil way (42), one end of the oil inlet oil way (42) is communicated with the oil tank (41), and the other end of the oil inlet oil way is communicated with the first oil way (2);
air escape passage (43): a valve is arranged on the air release passage (43), one end of the air release passage (43) is communicated with the second oil path (3), and the other end of the air release passage is communicated with the oil tank (41);
adjusting oil passage (45): the valve is also installed on adjusting oil circuit (45), the one end of adjusting oil circuit (45) with oil feed oil circuit (42) intercommunication, the other end with lose heart route (43) intercommunication, the valve on the route of disappointing (43) is located adjusting oil circuit (45) and keeping away from one side of cylinder body (1).
2. A hydraulic system according to claim 1, wherein: be connected with oil return circuit (44) on oil feed oil circuit (42), the other end of oil return circuit (44) with oil tank (41) intercommunication, install electromagnetism ball valve (443) on oil return circuit (44), install ooff valve (421) on oil feed oil circuit (42), telescopic link (12) upwards set up towards the direction of keeping away from piston (11).
3. A hydraulic system according to claim 2, wherein: and a needle-type throttle valve (442) is installed on the oil return oil path (44).
4. A hydraulic system according to claim 3, wherein: the oil return circuit (44) is provided with a first filter (441) and a pressure difference switch (444), and the pressure difference switch (444) is connected with the first filter (441) in parallel.
5. A hydraulic system according to claim 1, wherein: the oil inlet oil way (42) is connected with a pressurizing oil way (47), and the pressurizing oil way (47) is provided with an external manual pressurizing pump (473) and a valve for controlling the pressurizing oil way (47) to open and close.
6. A hydraulic system according to claim 5, wherein: and a one-way valve (472) is arranged on the pressurizing oil path (47), and the one-way valve (472) is positioned on one side, close to the oil inlet path (42), of the external manual pressurizing pump (473).
7. A hydraulic system according to any one of claims 1 to 6, characterized in that: the oil inlet oil way (42) is connected with an overflow oil way (46), the other end of the overflow oil way (46) is communicated with the oil tank (41), and an overflow valve (461) is installed on the overflow oil way (46).
8. A hydraulic system according to any one of claims 1 to 6, characterized in that: the oil tank (41) is connected with a heater (415) and a temperature sensor (416) for monitoring the oil temperature, the temperature sensor (416) is electrically connected with a central controller, and the central controller is electrically connected with the heater (415).
9. A hydraulic system according to any one of claims 1 to 6, characterized in that: and the first oil way (2) is connected with a gas isolation type energy accumulator (6).
10. A rotary kiln using the hydraulic system, the hydraulic system according to any one of claims 1 to 9, characterized in that: one end of the telescopic rod (12) is connected with the rotary kiln.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122018686.5U CN215908140U (en) | 2021-08-25 | 2021-08-25 | Hydraulic system and rotary kiln using same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122018686.5U CN215908140U (en) | 2021-08-25 | 2021-08-25 | Hydraulic system and rotary kiln using same |
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| Publication Number | Publication Date |
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| CN215908140U true CN215908140U (en) | 2022-02-25 |
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| CN202122018686.5U Active CN215908140U (en) | 2021-08-25 | 2021-08-25 | Hydraulic system and rotary kiln using same |
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2021
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