CN110885989A - Aluminum electrolysis self-adaptive crust breaking control method and control system - Google Patents
Aluminum electrolysis self-adaptive crust breaking control method and control system Download PDFInfo
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- CN110885989A CN110885989A CN202010006490.1A CN202010006490A CN110885989A CN 110885989 A CN110885989 A CN 110885989A CN 202010006490 A CN202010006490 A CN 202010006490A CN 110885989 A CN110885989 A CN 110885989A
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 29
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000006698 induction Effects 0.000 claims abstract description 20
- 230000000877 morphologic effect Effects 0.000 claims abstract description 20
- 238000009413 insulation Methods 0.000 claims abstract description 10
- 230000003044 adaptive effect Effects 0.000 claims description 18
- 230000000875 corresponding effect Effects 0.000 claims description 9
- 230000001276 controlling effect Effects 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 description 6
- 230000003993 interaction Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000013211 curve analysis Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000611 regression analysis Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/14—Devices for feeding or crust breaking
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/20—Automatic control or regulation of cells
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Abstract
The invention relates to the technical field of electrolytic aluminum intelligent crust breaking, in particular to an aluminum electrolysis self-adaptive crust breaking control method and a control system. The control method comprises the following steps: collecting crust breaking induction voltage and crust breaking exhaust pressure; the crust breaking induction voltage is the voltage drop formed between the crust breaking hammer head and the cathode bus at the bottom of the tank; the crust breaking exhaust pressure is the pressure of the exhaust port of the crust breaking cylinder; generating a real-time characteristic value array according to the crust breaking induction voltage and the crust breaking exhaust pressure, comparing and analyzing the real-time characteristic value array and a historical characteristic value array library, and judging morphological characteristics of the crust breaking hammer head and the blanking fire hole and the insulation state of the crust breaking cylinder; and adjusting the crust breaking depth and the crust breaking frequency of the crust breaking cylinder in a self-adaptive manner according to the judgment result so as to realize self-adaptive crust breaking and further effectively solve the problem that the hammer head is stuck to the crust.
Description
Technical Field
The invention relates to the technical field of electrolytic aluminum intelligent crust breaking, in particular to an aluminum electrolysis self-adaptive crust breaking control method and a control system.
Background
Crust breaking and blanking in an electrolysis workshop are a very key link of electrolysis production, and a material balance strategy of a cell control machine can be fully executed only if blanking points are smooth. The original groove control crust breaking system has no crust breaking and blanking feedback, and crust breaking is carried out according to the blanking period no matter the blanking fire hole is blocked; when the blanking fire hole is not smooth and even blocked, the automatic continuous crust breaking can not be carried out to break through the blanking point, so that more and more accumulated materials are caused, and finally the hammer head is clamped after the blockage; and the alarm can not be accurately given after the blanking point is blocked; in addition, the maximum stroke of the crust breaking cylinder is reached every time, the crust breaking hammer head reaches the deepest part of the electrolyte every time, so that the adhesion of the crust breaking hammer head to the electrolyte is increased gradually, and the crust breaking hammer head is adhered to a big bag after a plurality of continuous blanking periods, so that the alumina material cannot be completely put into the electrolyte, and even a blanking point is blocked or the hammer head is clamped; in addition, the non-insulation of the cylinder can cause electric sparks, which cause damage to related equipment and maintenance personnel.
Patent No. CN201510609979.7 provides an electrolytic aluminum crust breaking control method, and an intelligent control cabinet carries out corresponding comparison on a voltage feedback signal and a preset voltage threshold value and on an air pressure feedback signal and a preset air pressure threshold value according to an electrolyte voltage feedback signal and an exhaust air pressure feedback signal which are received, and increases the crust breaking times when the corresponding threshold value is exceeded.
In practice, the inventors found that the above prior art has the following disadvantages:
although above-mentioned scheme can control crust breaking cylinder and increase the crust breaking number of times when voltage and atmospheric pressure feedback signal surpass the threshold value, but can not solve the tup and glue the package problem.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide an aluminum electrolysis self-adaptive crust breaking control method and a control system, and the adopted technical scheme is as follows:
in a first aspect, an embodiment of the present invention provides an aluminum electrolysis adaptive crust breaking control method, including the following steps:
collecting crust breaking induction voltage and crust breaking exhaust pressure; the crust breaking induction voltage is the voltage drop formed between the crust breaking hammer head and the cathode bus at the bottom of the tank; the crust breaking exhaust pressure is the pressure of the exhaust port of the crust breaking cylinder;
generating a real-time characteristic value array according to the crust breaking induction voltage and the crust breaking exhaust pressure, comparing and analyzing the real-time characteristic value array and a historical characteristic value array library, and judging morphological characteristics of the crust breaking hammer head and the blanking fire hole and the insulation state of the crust breaking cylinder;
and adjusting the crust breaking depth and the crust breaking frequency of the crust breaking cylinder in a self-adaptive manner according to the judgment result so as to realize self-adaptive crust breaking.
Further, the control method further comprises the step of giving an alarm when the judging result is that the crust breaking hammer head is clamped into the blanking fire hole, the blanking fire hole is blocked or the crust breaking cylinder is not insulated.
Further, the morphological characteristics of the crust-breaking hammer head include length characteristics of the crust-breaking hammer head and diameter characteristics of the crust-breaking hammer head.
Further, the morphological characteristics of the blanking fire hole comprise the width characteristics of the blanking fire hole.
In a second aspect, another embodiment of the present invention provides an aluminum electrolysis adaptive crust breaking control system, comprising:
the data acquisition unit is used for respectively acquiring crust breaking induction voltage and crust breaking exhaust pressure; the crust breaking induction voltage is the voltage drop formed between the crust breaking hammer head and the cathode bus at the bottom of the tank; the crust breaking exhaust pressure is the pressure of the exhaust port of the crust breaking cylinder;
the controller is connected with the data acquisition unit and used for generating a real-time characteristic value array according to the crust breaking induction voltage and the crust breaking exhaust pressure sent by the data acquisition unit, comparing the real-time characteristic value array with a historical characteristic value array library and judging the morphological characteristics of the crust breaking hammer head and the blanking fire hole and the insulation state of the crust breaking cylinder; adjusting the crust breaking depth and the crust breaking frequency of the crust breaking cylinder in a self-adaptive manner according to the judgment result;
and the crust breaking execution unit is connected with the controller and used for controlling the crust breaking cylinder to execute corresponding actions according to the control command of the controller.
Furthermore, the control system also comprises an alarm unit for alarming when the judging result is that the crust breaking hammer head is clamped into the blanking fire hole, the blanking fire hole is blocked or the crust breaking cylinder is not insulated.
Further, the control system also comprises a human-computer interaction interface connected with the controller.
Further, the data acquisition unit comprises a pressure sensor connected with the controller and used for acquiring crust breaking exhaust pressure.
Further, the data acquisition unit include with the voltage acquisition unit that is used for gathering crust breaking induced voltage that the controller is connected, the voltage acquisition unit include with the negative pole that tank bottom cathode bus is connected, with the positive pole that the crust breaking tup is connected, receive the positive pole with the voltage transmitter of the signal of telecommunication of negative pole, voltage transmitter with the controller is connected.
Furthermore, a first input acquisition module is connected between the voltage transmitter and the controller in a bridging manner.
The invention has the following beneficial effects:
according to the aluminum electrolysis self-adaptive crust breaking control method provided by the invention, the acquired real-time characteristic value array is compared with the historical characteristic value array library to judge the morphological characteristics of the current crust breaking hammer head and the morphological characteristics of the blanking fire hole, so that the single-point crust breaking depth and the crust breaking frequency are adjusted in a self-adaptive manner, the self-adaptive intelligent crust breaking control function is realized, and the problem of hammer head sticking is further effectively solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions and advantages of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flow chart of an aluminum electrolysis adaptive crust breaking control method according to an embodiment of the present invention;
fig. 2 is a block diagram of an aluminum electrolysis adaptive crust breaking control system according to an embodiment of the present invention;
fig. 3 is a block diagram of an aluminum electrolysis adaptive crust breaking control system according to another embodiment of the present invention.
In the figure: 100-controller, 200-data acquisition unit, 300-crust breaking execution unit, 400-alarm unit, 500-human-computer interaction interface, 201-voltage sensor, 202-pressure sensor, 301-solenoid valve, 302-crust breaking cylinder, 2011-voltage transmitter, 2012-positive pole, 2013-negative pole, 203-first input acquisition module, 204-second input acquisition module.
Detailed Description
In order to further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the method and system for controlling aluminum electrolysis adaptive crust breaking according to the present invention will be made with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The connection in this embodiment refers to an electrical connection relationship, and may be a wired connection or a wireless connection, where the wireless connection includes but is not limited to WIFI, bluetooth, or infrared connection.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The specific scheme of the aluminum electrolysis self-adaptive crust breaking control method and the control system provided by the invention is specifically described below with reference to the accompanying drawings.
Referring to fig. 1 and fig. 2, fig. 1 shows a flow chart of an aluminum electrolysis adaptive crust breaking control method according to an embodiment of the present invention, and fig. 2 shows a block diagram of an aluminum electrolysis adaptive crust breaking control system according to an embodiment of the present invention. Referring to fig. 1, the control method provided in the present embodiment includes the following steps:
and S001, collecting crust breaking induction voltage and crust breaking exhaust pressure.
The crust breaking induction voltage is the voltage drop formed between the crust breaking hammer head and the cathode bus at the bottom of the tank.
Crust breaking discharge pressure refers to the pressure at the exhaust port of the crust breaking cylinder.
Referring to fig. 2, the control system includes a data acquisition unit 200 connected to the controller 100, and the data acquisition unit 200 includes a voltage acquisition unit 201 for acquiring crust breaking induced voltage and a pressure sensor 202 for acquiring crust breaking exhaust pressure.
Referring to fig. 3, in the embodiment, the voltage acquisition unit 201 includes a voltage transmitter 2011 connected to the controller, and a positive electrode 2012 and a negative electrode 2013 respectively connected to the voltage transmitter 2011. The negative electrode 2013 is connected with a cathode bus at the bottom of the tank, and the positive electrode 2012 is mounted on the crust breaking hammer. The voltage transmitter 2011 receives the positive and negative electrical signals, the voltage between the electrical signals may reach 100V, and a voltage transmitter that converts 0-100V to 0-10V is added for isolation and conversion, which is safer. Preferably, the voltage transmitter 2011 is connected to the controller 100 through the first input acquisition module 203 under the condition that the controller 100 does not select the type to multi-point synchronous high-speed acquisition signal. Specifically, in this embodiment, the first input acquisition module may select the model as DAM6160, and transmit the acquired data to the controller 100 through RS485 communication.
The pressure sensor 202 is arranged at the exhaust port of the crust breaking cylinder, and the pressure sensor adopts a pressure sensor with an output value of 4-20 mA. The pressure sensor 202 is connected with the controller 100 through a second input acquisition module 204 under the condition that the controller 100 does not select the type to acquire the signals at a high speed synchronously at multiple points. Specifically, in this embodiment, the second input acquisition module may be C2000 MDI 8.
And S002, generating a real-time characteristic value array according to the crust breaking induction voltage and the crust breaking exhaust pressure, comparing and analyzing the real-time characteristic value array and the historical characteristic value array library, and judging morphological characteristics of the crust breaking hammer head and the blanking fire hole and the insulation state of the crust breaking cylinder.
The historical characteristic value array library is different combination data of crust breaking hammer shape characteristics, blanking fire hole characteristics and cylinder insulation states stored in the database, and crust breaking induction voltage and crust breaking exhaust pressure data corresponding to the different combination data. And fitting corresponding induced voltage threshold values, pressure curve analysis slopes and pressure peak values through regression analysis, thereby forming a historical characteristic value array library. Different combinations of the induced voltage threshold, the pressure curve analysis slope and the pressure peak in the historical characteristic value array library represent different hammer head morphological characteristics and blanking fire hole morphological characteristics.
The morphological characteristics of the crust-breaking hammer head comprise length characteristics and diameter characteristics of the crust-breaking hammer head, such as length, thickness and other morphological characteristics of the crust-breaking hammer head. The morphological characteristics of the blanking fire hole comprise the morphological characteristics of width and the like of the blanking fire hole. The insulation state of the crust breaking cylinder means whether the crust breaking cylinder is insulated or not.
The comparison, analysis and judgment are performed by a controller, specifically, in this embodiment, the controller is a programmable logic controller PLC. In other embodiments, other controllers capable of performing data analysis and control of the cylinders may be used.
And S003, adaptively adjusting the crust breaking depth and the crust breaking frequency of the crust breaking cylinder according to the judgment result so as to realize adaptive crust breaking.
Referring to fig. 2 again, the crust breaking execution unit 300 includes a crust breaking cylinder 302 connected to the controller 100 through a corresponding solenoid valve 301, and the controller 100 sends out a control command according to the determination result, and the solenoid valve 301 is controlled to drive the crust breaking cylinder 302 to drive the crust breaking hammer to execute a corresponding crust breaking action. The solenoid valve 301 comprises a two-position, three-way solenoid valve connected to a crust breaking cylinder 302.
In summary, embodiments of the present invention provide an aluminum electrolysis adaptive crust breaking control method and a control system, where the control system includes a controller, a collection unit connected to the controller, and a crust breaking cylinder connected to the controller through an electromagnetic valve. The control method comprises the steps of generating a real-time characteristic value array by using crust breaking induction voltage and crust breaking exhaust pressure, comparing and analyzing the real-time characteristic value array with a historical characteristic value array library, judging morphological characteristics of a crust breaking hammer head and a blanking fire hole and an insulation state of a crust breaking cylinder, and adaptively adjusting crust breaking depth and crust breaking frequency of the crust breaking cylinder according to a judgment result to realize adaptive crust breaking; production experience and field investigation find that in the normal production process, when the blanking fire hole is unblocked and the crust is not crust continuously, the blanking fire hole crust generally needs about 10 minutes, and the original groove control system generally performs full-depth crust breaking according to the period of about 2 minutes; according to the judged forms of the crust-breaking hammer head and the blanking fire hole, under the condition that the crust-breaking hammer head is long enough and the fire hole is smooth, the stroke of the crust-breaking hammer head can be controlled, and meanwhile, the crust-breaking period can be prolonged, so that the depth of the crust-breaking hammer head penetrating into electrolyte and the working frequency of the crust-breaking hammer head can be reduced, and the chance of the crust-breaking hammer head adhering to the electrolyte can be reduced; thereby realize effectively solving the tup and glue the package problem, reduce workman intensity of labour simultaneously, prolong tup life, practice thrift compressed air quantity, reduction in production cost simultaneously, improve the equipment of the economic benefits of enterprise.
Preferably, referring to fig. 2 again, the control system further includes an alarm unit 400 connected to the controller 100, wherein the alarm unit 400 is used for giving an alarm when the hammer is stuck, the blanking fire hole is blocked, the crust breaking cylinder is not insulated, and the like. When the controller 100 judges that the hammer is stuck, the blanking fire hole is blocked, the crust breaking cylinder is not insulated and the like, the controller 100 sends an alarm signal to the alarm unit 400. The alarm unit 400 may be an audible and visual alarm, or may alarm by displaying status information such as hammer head jamming, blanking flare plugging, and uninsulated crust breaking cylinder, using the human-computer interface 500. The human-computer interface 500 includes, but is not limited to, a liquid crystal screen, a TFT color screen, a touch screen, and the like. And corresponding workers are reminded in a display alarm or sound-light alarm mode of the alarm unit.
The human-computer interaction interface 500 is connected with the controller 100, and besides alarm information such as hammer head clamping, blanking fire hole blockage, uninsulated crust breaking cylinder, equipment failure and the like, morphological information such as current crust breaking depth, length and thickness of the crust breaking hammer head and the width state of the blanking fire hole are displayed; the human-computer interaction interface 500 is used for correcting and setting the relevant characteristic value parameters, so that manual operations such as single-point crust breaking and single-point prohibition of crust breaking can be realized.
It should be noted that: the precedence order of the above embodiments of the present invention is only for description, and does not represent the merits of the embodiments. And specific embodiments thereof have been described above. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the device and server embodiments, since they are substantially similar to the method embodiments, the description is simple, and the relevant points can be referred to the partial description of the method embodiments.
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. An aluminum electrolysis self-adaptive crust breaking control method is characterized by comprising the following steps:
collecting crust breaking induction voltage and crust breaking exhaust pressure; the crust breaking induction voltage is the voltage drop formed between the crust breaking hammer head and the cathode bus at the bottom of the tank; the crust breaking exhaust pressure is the pressure of the exhaust port of the crust breaking cylinder;
generating a real-time characteristic value array according to the crust breaking induction voltage and the crust breaking exhaust pressure, comparing and analyzing the real-time characteristic value array and a historical characteristic value array library, and judging morphological characteristics of the crust breaking hammer head and the blanking fire hole and the insulation state of the crust breaking cylinder;
and adjusting the crust breaking depth and the crust breaking frequency of the crust breaking cylinder in a self-adaptive manner according to the judgment result so as to realize self-adaptive crust breaking.
2. The aluminum electrolysis self-adaptive crust breaking control method according to claim 1, further comprising giving an alarm when the crust breaking hammer is clamped into the blanking fire hole, the blanking fire hole is blocked or the crust breaking cylinder is not insulated as a result of the judgment.
3. The aluminum electrolysis adaptive crust breaking control method according to claim 1 or 2, wherein the morphological characteristics of the crust breaking hammer comprise length characteristics of the crust breaking hammer and diameter characteristics of the crust breaking hammer.
4. The aluminum electrolysis adaptive crust breaking control method according to claim 3, wherein the morphological characteristics of the blanking fire hole comprise the width characteristics of the blanking fire hole.
5. An aluminum electrolysis adaptive crust breaking control system, characterized in that the system comprises:
the data acquisition unit is used for respectively acquiring crust breaking induction voltage and crust breaking exhaust pressure; the crust breaking induction voltage is the voltage drop formed between the crust breaking hammer head and the cathode bus at the bottom of the tank; the crust breaking exhaust pressure is the pressure of the exhaust port of the crust breaking cylinder;
the controller is connected with the data acquisition unit and used for generating a real-time characteristic value array according to the crust breaking induction voltage and the crust breaking exhaust pressure sent by the data acquisition unit, comparing the real-time characteristic value array with a historical characteristic value array library and judging the morphological characteristics of the crust breaking hammer head and the blanking fire hole and the insulation state of the crust breaking cylinder; adjusting the crust breaking depth and the crust breaking frequency of the crust breaking cylinder in a self-adaptive manner according to the judgment result;
and the crust breaking execution unit is connected with the controller and used for controlling the crust breaking cylinder to execute corresponding actions according to the control command of the controller.
6. The aluminum electrolysis self-adaptive crust breaking control system according to claim 5, further comprising an alarm unit for alarming when the crust breaking hammer is clamped into the blanking fire hole, the blanking fire hole is blocked or the crust breaking cylinder is not insulated as a judgment result.
7. The aluminum electrolytic adaptive crust breaking control system according to claim 5 or 6, further comprising a human-machine interface connected to the controller.
8. The aluminum electrolytic adaptive crust breaking control system according to claim 5, wherein the data acquisition unit comprises a pressure sensor connected with the controller for acquiring crust breaking exhaust pressure.
9. The aluminum electrolysis adaptive crust breaking control system according to claim 5 or 8, wherein the data acquisition unit comprises a voltage acquisition unit connected with the controller and used for acquiring crust breaking induced voltage, the voltage acquisition unit comprises a negative electrode connected with the cathode bus of the cell bottom, a positive electrode connected with the crust breaking hammer head, and a voltage transmitter for receiving electric signals of the positive electrode and the negative electrode, and the voltage transmitter is connected with the controller.
10. The aluminum electrolytic adaptive crust breaking control system according to claim 9, wherein a first input acquisition module is connected across the voltage transmitter and the controller.
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| CN112760680A (en) * | 2020-12-19 | 2021-05-07 | 王建军 | Variable stroke crust breaking cylinder |
| CN112760680B (en) * | 2020-12-19 | 2024-02-02 | 内蒙古锦溪科技股份有限公司 | Variable stroke crust breaking cylinder |
| CN116024614A (en) * | 2023-03-01 | 2023-04-28 | 湖南力得尔智能科技股份有限公司 | Automatic energy-saving control system of slot control machine based on industrial network |
| CN116024614B (en) * | 2023-03-01 | 2024-01-30 | 湖南力得尔智能科技股份有限公司 | Automatic energy-saving control system of slot control machine based on industrial network |
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