CN113510001B - Method for accurately adjusting discharge port of crusher - Google Patents
Method for accurately adjusting discharge port of crusher Download PDFInfo
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- CN113510001B CN113510001B CN202110555511.XA CN202110555511A CN113510001B CN 113510001 B CN113510001 B CN 113510001B CN 202110555511 A CN202110555511 A CN 202110555511A CN 113510001 B CN113510001 B CN 113510001B
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- control system
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- discharge opening
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
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Abstract
The invention belongs to the technical field of crushers, and particularly relates to a method for accurately adjusting a discharge port of a crusher. The movable part of the discharge port of the crusher is connected with a hydraulic oil cylinder, the movement of the movable part of the discharge port is controlled by controlling the action of the hydraulic oil cylinder, and the relative position between the movable part of the discharge port and the static part of the discharge port is adjusted, so that the size of the discharge port is adjusted. An electromagnetic proportional valve is arranged in the hydraulic system to control the movement speed of the hydraulic oil cylinder; the system is provided with a displacement sensor for detecting the relative position of the discharge port, and the displacement sensor can be arranged in a hydraulic oil cylinder; in order to protect the crusher and a crusher hydraulic system, a pressure sensor is arranged at an oil inlet of a hydraulic oil cylinder to detect the pressure of the oil inlet; the electromagnetic proportional valve, the displacement sensor and the pressure sensor are in signal connection with the electric control system. The size of the discharge opening can be rapidly adjusted through the electric control system, and the discharge opening can be guaranteed within a certain precision range, so that the discharge opening is prevented from being too large or too small.
Description
Technical Field
The invention belongs to the technical field of crushers, and particularly relates to a method for accurately adjusting a discharge port of a crusher.
Background
The crusher is widely applied to industries such as mines, buildings, cement, railways, garbage disposal and the like. The precision of the discharge opening of the crusher not only has great influence on the quality and the yield of products, but also has great influence on the reliability and the service life of the crusher. In the working process of the crusher, the size of the discharge opening is changed frequently due to the change of mineral aggregate components and the abrasion of the discharge opening, so that the size of the discharge opening needs to be adjusted frequently.
Currently, the discharge outlets of most crushers are regularly measured and adjusted by manual adjustment; the change of the discharge port in the work depends on the spring mechanism to finish the overload discharge and the reset. Part manufacturers develop and design an automatic discharge port electronic control system based on a hydraulic system, and a control multipurpose switch valve of a hydraulic pipeline of the automatic discharge port electronic control system often has the phenomenon that a discharge port is too large or too small in the dynamic adjustment process, and in the serious condition, the system has the oscillation phenomenon and the discharge port is continuously adjusted. Seriously affecting the quality and yield of the product. Some manufacturers adopt the throttle valve to reduce oil inlet and oil discharge flow, meet the precision adjustment requirement, prevent the phenomenon that the bin outlet vibrates, but prolong the adjustment time, the defective rate of product increases, has reduced the output of equipment. In conclusion, the existing adjusting methods cannot well solve the problems of realizing quick adjustment and high-precision control. In chinese patents CN207680772U, CN108150465A and CN107597408A, solutions are provided for the mechanical structure, control mechanism and control strategy for automatically adjusting the discharge openings of impact crushers and cone crushers, but the problems of quick adjustment and high-precision adjustment of the discharge openings are still not solved.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a method for accurately adjusting the discharge opening of a crusher, which can quickly adjust the size of the discharge opening through an electric control system, can ensure that the discharge opening is within a certain precision range, and prevents the discharge opening from being too large or too small.
The invention is realized by the following technical scheme: a method for accurately adjusting the discharge opening of a crusher is characterized in that a movable part of the discharge opening is connected with a hydraulic oil cylinder, the movement of the movable part of the discharge opening is controlled by controlling the action of the hydraulic oil cylinder, and the relative position between the movable part of the discharge opening and a static part of the discharge opening is adjusted, so that the size of the discharge opening is adjusted; an electromagnetic proportional valve is arranged in the hydraulic system to control the movement speed of the hydraulic oil cylinder; the hydraulic system is provided with a displacement sensor for detecting the relative position of the discharge port, and the displacement sensor is arranged in the hydraulic oil cylinder; in order to protect the crusher and a crusher hydraulic system, a pressure sensor for detecting the pressure of an oil inlet is arranged at the oil inlet of the hydraulic oil cylinder; the electromagnetic proportional valve, the displacement sensor and the pressure sensor are in signal connection with the electric control system; the electric control system comprises an intelligent controller;
the control method of the discharge opening of the crusher comprises the following steps:
the adjustment mode without load is as follows: starting an electric control system, outputting a maximum control signal by the electric control system, opening an electromagnetic proportional valve to the maximum flow, and moving a hydraulic oil cylinder at the maximum speed; the electric control system receives the numerical value transmitted by the displacement sensor, compares the numerical value with a speed reduction position numerical value set by the electric control system, and when the numerical value output by the displacement sensor is greater than or equal to the speed reduction position numerical value set by the electric control system, the electric control system gradually reduces the output control signal until a feeding signal is set, the opening of the electromagnetic proportional valve is reduced to the set opening, and the hydraulic oil cylinder drives the movable part of the discharge opening to slowly rise at the set low speed; when the electric control system detects that the value transmitted by the displacement sensor is consistent with the set position of the discharge opening, the electric control system stops supplying power to the electromagnetic proportional valve, and the movable part of the discharge opening reaches the set position;
the load adjustment mode is as follows: when the electric control system detects that the output value of the pressure sensor is rapidly increased in the working process of the crusher, the electric control system controls the hydraulic oil cylinder to rapidly retract, the discharge opening is rapidly increased, and materials which are difficult to crush are released; then the electric control system judges the position of the movable part of the discharge opening according to the output signal of the displacement sensor, and gives the opening degree of the electromagnetic proportional valve: the electric control system receives the numerical value transmitted by the displacement sensor, compares the numerical value with a speed reduction position numerical value set by the electric control system, and when the numerical value output by the displacement sensor is smaller than the set speed reduction position numerical value, the opening degree of the electromagnetic proportional valve is maximum, and the hydraulic oil cylinder moves rapidly; when the value output by the displacement sensor is greater than or equal to the set deceleration position value of the electric control system, the electric control system gradually reduces the output control signal until the set feeding signal is obtained, the opening degree of the electromagnetic proportional valve is reduced to the set opening degree, and the hydraulic oil cylinder drives the movable part of the discharge opening to slowly rise at the set low speed; when the electric control system detects that the value transmitted by the displacement sensor is consistent with the set position of the discharge opening, the electric control system stops supplying power to the electromagnetic proportional valve, and the discharge opening reaches the set position of the discharge opening.
Further, the control signal of the electromagnetic proportional valve is controlled by a continuously changing analog signal or a discrete electric signal.
Furthermore, a travel limit switch for detecting the limit position of the charging door is arranged on the crusher.
Further, the control method of the zero point check is also included: and the electric control system detects a signal of the stroke limit switch, the power of the crushing motor and a signal of the pressure sensor, and if the electric control system receives any trigger signal of the stroke limit switch, the power of the crushing motor reaching a set value and the pressure sensor reaching the set value, the hydraulic oil cylinder stops advancing and waits for manual or automatic zero point confirmation of the system.
Furthermore, an oil supply pipeline and an oil return pipeline of the hydraulic system are provided with the electromagnetic proportional valve.
The invention has the beneficial effects that: the electric control system sends signals to the electromagnetic proportional valve to control the running speed of the hydraulic oil cylinder, and when the adjusting distance is large, the hydraulic oil cylinder runs fast; when being close to the adjusting end point, the hydraulic oil cylinder operates very slowly, so that the quick adjustment and the excessive adjustment can be prevented, and the requirement of the position precision of the discharge gate is met.
Drawings
FIG. 1 is a schematic diagram of one embodiment of the present invention;
in the figure, the device comprises a travel limit switch 1, a travel limit switch 2, a pressure sensor 3, an electric control system 4, an oil pump 5, an electromagnetic proportional valve bank 6, a displacement sensor 7 and a crusher.
Detailed Description
The invention is further illustrated below with reference to the figures and examples.
A method for accurately adjusting the discharge port of a single-shaft cone crusher realizes accurate control by controlling an electromagnetic proportional valve through an electric control system. As shown in fig. 1, the present embodiment includes a hydraulic oil supply system, a hydraulic oil control system, a moving cone lift cylinder, and a control system including various sensors.
The hydraulic oil supply system comprises a hydraulic oil pump, a pipeline, a filter, a safety overload overflow valve and the like.
The hydraulic oil control system is mainly a pair of electromagnetic proportional valves integrated together, the opening of the electromagnetic proportional valve is controlled by PWM signals, 0-100% of flow control can be provided, and an overvoltage protection function can be provided.
The movable cone lifting oil cylinder is connected with the movable cone shaft, and the lifting position of the movable cone is controlled by controlling the extension of an oil cylinder rod, so that the relative position between the movable cone (a movable part of a discharge opening) and the static cone (a static part of the discharge opening) is controlled, and the size of the discharge opening is adjusted.
Be equipped with displacement sensor 6 on the hydraulic cylinder, in order to protect breaker and breaker hydraulic system, be equipped with pressure sensor 2 on hydraulic cylinder's rodless chamber advances oil pipe way, displacement sensor 6 and pressure sensor 2 and the electromagnetism proportional valve in the electromagnetism proportional valve group 5 all with electrical system 3 signal connection, electrical system includes intelligent control ware and solid state relay. The control signal of the electromagnetic proportional valve is controlled by adopting a continuously-changed analog signal or a discrete electric signal, the PWM discrete signal is preferably used for controlling, the flow control of the electromagnetic proportional valve can be 0-100%, and an overvoltage protection function can be provided.
The control method of the discharge opening of the crusher comprises the following steps:
the adjustment mode without load is as follows: starting the electric control system 3, outputting a maximum control signal by the electric control system 3, opening the electromagnetic proportional valve group 5 to the maximum flow, and raising the hydraulic oil cylinder at the maximum speed; the electric control system 3 receives the numerical value transmitted by the displacement sensor 6, compares the numerical value with the speed reduction position numerical value set by the electric control system 3, when the numerical value output by the displacement sensor 6 is greater than or equal to the speed reduction position numerical value set by the electric control system, the electric control system 3 gradually reduces the output control signal until a set feeding signal is obtained, the opening of the electromagnetic proportional valve group 5 is reduced to the set opening, and the hydraulic oil cylinder drives the movable part of the discharge port to slowly rise at the set low speed; when the electric control system 3 detects that the value transmitted by the displacement sensor 6 is consistent with the set position of the discharge opening, the electric control system 3 stops supplying power to the electromagnetic proportional valve group 5, and the discharge hopper reaches the set position of the discharge opening;
the load adjusting mode is as follows: in the working process of the crusher 7, when the electric control system 3 detects that the output value of the pressure sensor 2 is rapidly increased, the electric control system 3 controls the hydraulic oil cylinder to rapidly retract, the discharge opening is rapidly increased, and materials which are difficult to crush are released; then the electric control system 3 judges the position of the movable part of the discharge opening according to the output signal of the displacement sensor 6, and gives the opening degree of the electromagnetic proportional valve group 5: the electric control system 3 receives the numerical value transmitted by the displacement sensor 6, compares the numerical value with a deceleration position numerical value set by the electric control system 3, and when the numerical value output by the displacement sensor 6 is smaller than the set deceleration position numerical value, the opening degree of the electromagnetic proportional valve group 5 is maximum, and the hydraulic oil cylinder moves rapidly; when the value output by the displacement sensor 6 is greater than or equal to the set deceleration position value of the electric control system, the electric control system 3 gradually reduces the output control signal until the set feeding signal is obtained, the opening degree of the electromagnetic proportional valve group 5 is reduced to the set opening degree, and the hydraulic oil cylinder drives the movable part of the discharge opening to slowly rise at the set low speed; when the electric control system 3 detects that the value transmitted by the displacement sensor 6 is consistent with the set position of the discharge opening, the electric control system 3 stops supplying power to the electromagnetic proportional valve group 5, and the discharge opening reaches the set position of the discharge opening.
After the work is finished, the electric control system 3 controls the movable part of the discharge opening to descend to a work preparation position, and the hydraulic oil cylinder runs fast when the adjusting distance is large in the process of ascending the movable part of the discharge opening; near the end of the adjustment, the hydraulic ram runs very slowly.
Considering that an error may be generated after a period of operation, a check is also needed to maintain accurate control of the discharge opening, so the application also provides a control method of zero point check: the crusher 7 is provided with a travel limit switch 1 for detecting the limit position of the charging door. The electric control system 3 detects signals of the travel limit switch 1, the power of the crushing motor and signals of the pressure sensor 2, if the electric control system 3 receives that any one of the travel limit switch 1, the power of the crushing motor reaching a set value and the pressure sensor 2 reaching the set value meets the conditions, the electromagnetic proportional valve group 5 and the oil pump 4 of the hydraulic system are powered off, the work is stopped, and the zero point confirmation is waited to be carried out manually or automatically by the system.
Claims (5)
1. A method for accurately adjusting the discharge opening of a crusher is characterized in that a movable part of the discharge opening is connected with a hydraulic oil cylinder, the movement of the movable part of the discharge opening is controlled by controlling the action of the hydraulic oil cylinder, and the relative position between the movable part of the discharge opening and a static part of the discharge opening is adjusted, so that the size of the discharge opening is adjusted; an electromagnetic proportional valve is arranged in the hydraulic system to control the movement speed of the hydraulic oil cylinder; the hydraulic system is provided with a displacement sensor for detecting the relative position of the discharge port; a pressure sensor for detecting the pressure of an oil inlet is arranged at the oil inlet of the hydraulic oil cylinder; the electromagnetic proportional valve, the displacement sensor and the pressure sensor are in signal connection with the electric control system; the electric control system comprises an intelligent controller;
the control method of the discharge opening of the crusher comprises the following steps:
the adjustment mode without load is as follows: starting an electric control system, outputting a maximum control signal by the electric control system, opening an electromagnetic proportional valve to the maximum flow, and moving a hydraulic oil cylinder at the maximum speed; the electric control system receives the numerical value transmitted by the displacement sensor, compares the numerical value with a speed reduction position numerical value set by the electric control system, and when the numerical value output by the displacement sensor is greater than or equal to the speed reduction position numerical value set by the electric control system, the electric control system gradually reduces the output control signal until a feeding signal is set, the opening of the electromagnetic proportional valve is reduced to the set opening, and the hydraulic oil cylinder drives the movable part of the discharge opening to slowly rise at the set low speed; when the electric control system detects that the value transmitted by the displacement sensor is consistent with the set position of the discharge opening, the electric control system stops supplying power to the electromagnetic proportional valve, and the movable part of the discharge opening reaches the set position;
the load adjustment mode is as follows: when the crusher works, when the electric control system detects that the output value of the pressure sensor is rapidly increased, the electric control system controls the hydraulic oil cylinder to rapidly retract, the discharge opening is rapidly increased, and materials which are difficult to crush are released; then the electric control system judges the position of the movable part of the discharge opening according to the output signal of the displacement sensor, and gives the opening degree of the electromagnetic proportional valve: the electric control system receives the numerical value transmitted by the displacement sensor, compares the numerical value with a speed reduction position numerical value set by the electric control system, and when the numerical value output by the displacement sensor is smaller than the set speed reduction position numerical value, the opening degree of the electromagnetic proportional valve is maximum, and the hydraulic oil cylinder moves rapidly; when the value output by the displacement sensor is greater than or equal to the set deceleration position value of the electric control system, the electric control system gradually reduces the output control signal until the set feeding signal is obtained, the opening degree of the electromagnetic proportional valve is reduced to the set opening degree, and the hydraulic oil cylinder drives the movable part of the discharge opening to slowly rise at the set low speed; when the electric control system detects that the value transmitted by the displacement sensor is consistent with the set position of the discharge opening, the electric control system stops supplying power to the electromagnetic proportional valve, and the discharge opening reaches the set position of the discharge opening.
2. A method of fine tuning of the discharge opening of a crusher as claimed in claim 1, characterized in that the control signal of said electromagnetic proportional valve is controlled by a continuously varying analog signal or by discrete electrical signals.
3. A method of fine adjustment of a discharge opening of a crusher as claimed in claim 1, characterized in that the crusher is provided with a limit switch for detecting the extreme position of the material gate.
4. A method of fine tuning a discharge opening of a crusher as claimed in claim 3, further comprising a control method of zero point verification: and the electric control system detects a signal of the stroke limit switch, the power of the crushing motor and a signal of the pressure sensor, and if the electric control system receives any trigger signal of the stroke limit switch, the power of the crushing motor reaching a set value and the pressure sensor reaching the set value, the hydraulic oil cylinder stops advancing and waits for manual or automatic zero point confirmation of the system.
5. The method for precisely adjusting the discharge outlet of a crusher according to any one of claims 1 to 4, characterized in that an oil supply line and an oil return line of a hydraulic system are provided with the electromagnetic proportional valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110555511.XA CN113510001B (en) | 2021-05-21 | 2021-05-21 | Method for accurately adjusting discharge port of crusher |
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| CN202110555511.XA CN113510001B (en) | 2021-05-21 | 2021-05-21 | Method for accurately adjusting discharge port of crusher |
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| CN113510001B true CN113510001B (en) | 2022-06-10 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114950615B (en) * | 2022-04-29 | 2023-10-03 | 成都大宏立机器股份有限公司 | Automatic compensation control method for conical break discharge port |
| CN118634976A (en) * | 2024-08-15 | 2024-09-13 | 中慧农牧股份有限公司 | Intelligent control system of feed grinder |
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| CN211514640U (en) * | 2019-12-19 | 2020-09-18 | 福建南方路面机械股份有限公司 | Jaw crusher load feedback system |
| CN111997947A (en) * | 2020-08-31 | 2020-11-27 | 徐州徐工矿业机械有限公司 | Hydraulic system for opening and closing bucket of face shovel excavator |
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2021
- 2021-05-21 CN CN202110555511.XA patent/CN113510001B/en active Active
Patent Citations (13)
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| JPS555718A (en) * | 1978-06-28 | 1980-01-16 | Kawasaki Heavy Ind Ltd | Turning crusher operation control method |
| SE8601353D0 (en) * | 1987-09-10 | 1986-03-24 | Boliden Ab | REGULATION OF GYRATORIC CRUSHES |
| JPH10272375A (en) * | 1997-03-31 | 1998-10-13 | Kurimoto Ltd | Method for controlling gyratory crusher |
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