CN111577681B - Double-cylinder synchronous control system and control method - Google Patents
Double-cylinder synchronous control system and control method Download PDFInfo
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- CN111577681B CN111577681B CN202010381908.7A CN202010381908A CN111577681B CN 111577681 B CN111577681 B CN 111577681B CN 202010381908 A CN202010381908 A CN 202010381908A CN 111577681 B CN111577681 B CN 111577681B
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- 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
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/10—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks
- B66F7/16—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/28—Constructional details, e.g. end stops, pivoting supporting members, sliding runners adjustable to load dimensions
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- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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Abstract
The invention relates to a double-cylinder synchronous control system and a control method of a plasma instant freezer. The device can realize controlling first cylinder and second cylinder alone to detect the displacement to the displacement sensor, realize accurate regulation. The system can still keep the level of the cold plate to rise under the condition that loads on two sides of the cold plate are different, the problem of uneven gravity on a platform is solved, and meanwhile, the double-cylinder synchronous control system is simple in structural design, low in cost, high in practicability and control accuracy, capable of improving the freezing efficiency and reducing the faults and losses of equipment.
Description
Technical Field
The invention belongs to the technical field of plasma instant freezers, and particularly relates to a double-cylinder synchronous control system and a control method.
Background
The plasma instant freezer is used as important equipment for ensuring the plasma quality, is not only applied to a central blood station, but also widely applied to various large and medium hospitals, biological agent factories and the like. In order to ensure the quality of plasma, it is required that the plasma must be separated from whole blood within 6 to 8 hours after blood collection and quick frozen into a mass at a low temperature. The contact type plasma instant freezer is also called a flat plate instant freezer, which freezes plasma by utilizing the direct contact of a plasma bag and a cold plate, has good heat transfer effect, low noise and flat plasma bag after quick freezing, and is adopted by more and more medical institutions.
At present, current dull and stereotyped frozen machine is all through letting two cylinders UNICOM, the lift of two cylinders of simultaneous control to make the elevating platform keep the level, however, the unbalanced problem of gravity on the platform can not be overcome to this kind of mode. Because the both ends of cold plate are provided with the refrigeration plant of weight difference, when the blood bag was born to the multilayer cold drawing moreover, the distribution weight difference of blood bag also can lead to the phenomenon of platform gravity imbalance. When the gravity of the platform is unbalanced, the cold plate is easy to incline, so that the freezing effect is reduced, and the equipment can be seriously failed and damaged.
Therefore, the existing dual cylinder control system is still to be further improved.
Disclosure of Invention
Aiming at the technical problems, the invention provides a double-cylinder synchronous control system and a control method.
According to the technical scheme, the double-cylinder synchronous control system of the plasma instant freezer comprises a main body frame, a driving assembly, a detection assembly and a control assembly, wherein multiple layers of cold plates are arranged in the main body frame, the driving assembly comprises a first cylinder, a second cylinder and a lifting table, the lifting table is arranged below the lowest layer of cold plate, the first cylinder and the second cylinder are respectively arranged at two ends of the lifting table, the lifting table drives the multiple layers of cold plates to move up and down in the main body frame under the driving of the first cylinder and the second cylinder, the detection assembly comprises a first displacement sensor and a second displacement sensor, the first displacement sensor and the second displacement sensor are respectively arranged on the first cylinder and the second cylinder and are used for respectively detecting the moving distance of the first cylinder and the second cylinder, the controller is respectively connected with the first cylinder, the second cylinder, the first displacement sensor and the second displacement sensor.
Furthermore, a first mounting seat and a second mounting seat are symmetrically arranged at two ends of the lifting platform, the first air cylinder is mounted on the first mounting seat, a first connecting plate is further arranged on the first mounting seat, the top end of the first displacement sensor is connected with the top end of the first air cylinder through the first connecting plate, and the first displacement sensor and the first air cylinder are mounted in parallel;
the second cylinder is installed on the second installation seat, a second connection plate is further arranged on the second installation seat, the top end of the second displacement sensor is connected with the top end of the second cylinder through the second connection plate, and the second displacement sensor and the second cylinder are installed in parallel.
Further, the superiors 'cold drawing of multilayer cold drawing pass through the fixed block with main body frame top fixed connection, and lower floor's cold drawing all links to each other with its upper cold drawing through connecting block and bolt, be equipped with the spout position on the connecting block, when the cold drawing removed, the bolt can the spout position removes, four angular positions of main body frame still are provided with four guide bars, the guide bar with main body frame is fixed for lead when reciprocating for multilayer cold drawing, on the guide bar and be located between the multiply wood, still be provided with elastomeric element respectively, elastomeric element is the spring.
Further, the double-cylinder synchronous control system is characterized by further comprising an air pump, an air storage tank, an electromagnetic directional valve set and a manual speed regulating valve set, wherein the electromagnetic directional valve set comprises a first electromagnetic directional valve, a second electromagnetic directional valve, a third electromagnetic directional valve and a fourth electromagnetic directional valve, the manual speed regulating valve set comprises a first manual speed regulating valve, a second manual speed regulating valve, a third manual speed regulating valve and a fourth manual speed regulating valve, an air outlet of the air pump is connected with an air inlet of the air storage tank, an air outlet of the air storage tank is divided into two paths, one path is connected with an air inlet of the first electromagnetic directional valve, the other path is connected with an air inlet of the second electromagnetic directional valve, an air outlet of the first electromagnetic directional valve is connected with an air inlet of the third electromagnetic directional valve, an air outlet of the third electromagnetic directional valve is connected with a lever cavity of the first cylinder through the first manual valve, the second air outlet of the third electromagnetic directional valve passes through the third manual speed regulating valve and is connected with the rodless cavity of the first air cylinder, the first air outlet of the fourth electromagnetic directional valve passes through the second manual speed regulating valve and is connected with the rodless cavity of the second air cylinder, and the second air outlet of the fourth electromagnetic directional valve passes through the fourth manual speed regulating valve and is connected with the rodless cavity of the second air cylinder.
Furthermore, the first electromagnetic directional valve and the second electromagnetic directional valve are two-position three-way valves, the third electromagnetic directional valve and the fourth electromagnetic directional valve are two-position five-way valves, and the exhaust port of the first electromagnetic directional valve and the exhaust port of the second electromagnetic directional valve are blocked, so that gas cannot leak when the first electromagnetic directional valve and the second electromagnetic directional valve are not powered.
In a second aspect, the technical solution provided by the embodiment of the present application is to provide a method for controlling the double-cylinder synchronization of a plasma instant freezer, which adopts the control of the double-cylinder synchronization control system, and specifically comprises the following steps:
the controller receives a signal sent by an operator to obtain a received signal;
the controller supplies power to the electromagnetic directional valve according to the received signal;
the first sensor detects the displacement distance of the first cylinder to obtain a first displacement value, and the second sensor detects the displacement distance of the second cylinder to obtain a second displacement value;
the controller performs difference on the first displacement value and the second displacement value to obtain a displacement difference value, and compares the absolute value of the displacement difference value with a standard difference value;
if the absolute value of the displacement difference value is larger than the standard difference value and the displacement difference value is positive, the controller stops supplying power to the first electromagnetic directional valve until the first displacement value is the same as the second displacement value, and continues supplying power to the first electromagnetic directional valve;
and if the absolute value of the displacement difference is greater than the standard difference and the displacement difference is negative, the controller stops supplying power to the second electromagnetic directional valve until the second displacement value is the same as the first displacement value, and the controller continues supplying power to the second electromagnetic directional valve.
Further, the received signal includes one of a signal to raise the cold plate, a signal to lower the cold plate, and a signal to hold the cold plate stationary.
Further, the step of supplying power to the electromagnetic directional valve by the controller according to the received signal comprises:
if the received signal is a signal for lifting the cold plate, the controller controls the first electromagnetic directional valve electromagnet DT1, the second electromagnetic directional valve electromagnet DT2, the fourth electromagnetic directional valve electromagnet DT3 and the third electromagnetic directional valve electromagnet DT5 to be electrified, the fourth electromagnetic directional valve electromagnet DT4 and the third electromagnetic directional valve electromagnet DT6 are not electrified, the first air cylinder and the second air cylinder are ejected outwards, and the lifting platform is lifted;
if the received signals are signals for enabling the cold plate to descend, the controller controls the first electromagnetic reversing valve electromagnet DT1, the second electromagnetic reversing valve electromagnet DT2, the fourth electromagnetic reversing valve electromagnet DT4, the third electromagnetic reversing valve electromagnet DT6 to be electrified, the fourth electromagnetic reversing valve electromagnet DT3 and the third electromagnetic reversing valve electromagnet DT5 to be not electrified, the first air cylinder and the second air cylinder both retract, and the lifting platform descends;
if the received signal is a signal for keeping the cold plate immovable, the controller controls the upper and lower cold plates to keep immovable when the first electromagnetic reversing valve electromagnet DT1 and the second electromagnetic reversing valve electromagnet DT2 are not electrified.
Further, the step of supplying power to the electromagnetic directional valve by the controller according to the received signal further includes:
the controller controls the third manual speed regulating valve to regulate the ascending speed of the first cylinder, and the controller controls the fourth manual speed regulating valve to regulate the ascending speed of the second cylinder;
the controller controls the first manual speed regulating valve to regulate the descending speed of the first cylinder, and the controller controls the second manual speed regulating valve to regulate the descending speed of the second cylinder.
Further, the standard deviation value may be set and stored in the controller.
The double-cylinder synchronous control system and the control method have the advantages that the first cylinder and the second cylinder are controlled independently, the displacement sensors are arranged on the first cylinder and the second cylinder respectively, the moving distances of the first cylinder and the second cylinder are detected respectively, the cylinders are adjusted respectively by comparing the moving distances of the first cylinder and the second cylinder, and the purpose of keeping the lifting platform horizontal is achieved. The system can still keep the level of the cold plate to rise under the condition that loads on two sides of the cold plate are different, the problem of uneven gravity on a platform is solved, and meanwhile, the double-cylinder synchronous control system is simple in structural design, low in cost, high in practicability and control accuracy, capable of improving the freezing efficiency and reducing the faults and losses of equipment.
Drawings
FIG. 1 is a schematic structural diagram of a dual-cylinder synchronous control system of a plasma instant freezer according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of another view angle of the dual-cylinder synchronous control system of the plasma freezer according to the embodiment of the present application;
FIG. 3 is an enlarged view of detail A of FIG. 2;
FIG. 4 is a schematic view of a partial structure of a dual-cylinder synchronous control system of the plasma freezer according to the embodiment of the present application;
FIG. 5 shows a system for controlling the synchronization of the two cylinders of the plasma freezer according to the embodiment of the present application;
FIG. 6 is a schematic flow chart of a method for synchronously controlling two air cylinders of the plasma freezer according to the embodiment of the present application;
10-a plasma instant freezer double-cylinder synchronous control system, 100-a main body frame, 200-a cold plate, 201-a first layer cold plate, 202-a second layer cold plate, 203-a third layer cold plate, 204-a fourth layer cold plate, 205-a fifth layer cold plate, 300-a first cylinder, 400-a second cylinder, 310-a first displacement sensor, 410-a second displacement sensor, 500-a lifting platform, 320-a first supporting seat, 420-a second supporting seat, 330-a first connecting plate, 430-a second connecting plate, 210-a fixed block, 220-a connecting block, 230-a bolt, 250-a sliding groove position, 260-a guide rod, 270-a spring, 510-an air pump, 520-an air storage tank, 531-a first electromagnetic reversing valve and 532-a second electromagnetic reversing valve, 533-third electromagnetic directional valve, 534-fourth electromagnetic directional valve, 541-first manual speed regulating valve, 542-second manual speed regulating valve, 543-third manual speed regulating valve, 544-fourth manual speed regulating valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
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 application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.
As shown in fig. 1, the present application provides a dual-cylinder synchronous control system 10 for a plasma freezer, which includes a main frame 100, a driving assembly, a detecting assembly, and a control assembly. Be provided with the multilayer cold drawing in the main body frame 100, each layer cold drawing parallel arrangement, drive assembly includes first cylinder 300, second cylinder 400 and elevating platform 500, and elevating platform 500 sets up in the below of the cold drawing of lower floor, and each layer cold drawing can reciprocate in main body frame 100 under drive assembly's effect. Specifically, the first cylinder 300 and the second cylinder 400 are respectively disposed at two ends of the lifting platform 500, and the lifting platform 500 drives the multi-layer cold plate to move up and down in the main body frame 100 under the driving of the first cylinder 300 and the second cylinder 400. The detecting assembly includes a first displacement sensor 310 and a second displacement sensor 410, wherein the first displacement sensor 310 is disposed on the first cylinder 300 for detecting a moving distance of the first cylinder 300, and the second displacement sensor 410 is disposed on the second cylinder 400 for detecting a moving distance of the second cylinder 400. The control assembly is connected to the first cylinder 300, the second cylinder 400, the first displacement sensor 310 and the second displacement sensor 410, respectively.
According to the embodiment of the application, the first cylinder 300 and the second cylinder 400 are independently controlled, the first displacement sensor 310 and the second displacement sensor 410 are respectively arranged on the first cylinder 300 and the second cylinder 400, the moving distances of the first cylinder 300 and the second cylinder 400 are respectively detected, the cylinders are respectively adjusted by comparing the moving distances of the first cylinder 300 and the second cylinder 400, and the purpose of keeping the lifting platform horizontal is achieved. The system can still keep the level of the cold plate to rise under the condition that loads on two sides of the cold plate are different, the problem of uneven gravity on a platform is solved, and meanwhile, the double-cylinder synchronous control system is simple in structural design, low in cost, high in practicability and control accuracy, capable of improving the freezing efficiency and reducing the faults and losses of equipment.
As shown in fig. 1, 2 and 4, the first and second mounting seats 320 and 420 are symmetrically disposed at both ends of the lifting platform 500, the first cylinder 300 is mounted on the first mounting seat 320, the first mounting seat 320 is further provided with a first connecting plate 330, the top end of the first displacement sensor 310 is connected to the top end of the first cylinder 300 through the first connecting plate 330, and the first displacement sensor 310 is mounted in parallel with the first cylinder 300. The second cylinder 400 is mounted on the second mounting seat 420, a second connecting plate 430 is further disposed on the second mounting seat 420, the top end of the second displacement sensor 410 is connected with the top end of the second cylinder 400 through the second connecting plate 430, and the second displacement sensor 410 is mounted in parallel with the second cylinder 400.
The multi-layer cold plate can be provided with more than two layers, preferably five layers according to the requirement of a user, and comprises a first layer cold plate 201, a second layer cold plate 202, a third layer cold plate 203, a fourth layer cold plate 204 and a fifth layer cold plate 205 from low to high. As shown in fig. 1, 2 and 3, the uppermost cold plate of the multiple layers of cold plates is fixedly connected to the top end of the main frame 100 through the fixing block 210, the lower cold plate is connected to the upper cold plate through the connecting block 220 and the bolt 230, the connecting block 220 is provided with a sliding slot 250, and when the cold plates move, the bolt can move in the sliding slot 250. When the first cylinder 300 and the second cylinder 400 ascend, the lifting platform 500 drives the lowest layer of cold plates, i.e., the first layer of cold plates 201 ascend, meanwhile, the first layer of cold plates 201 drive the second layer of cold plates 202 to ascend through the connecting block 220 and the bolt 230, and so on, the second layer of cold plates 202 drive the third layer of cold plates 203 to ascend, and the third layer of cold plates 203 drive the fourth layer of cold plates 203 to ascend. When the cold plates ascend, the bolts 230 on the layer slide upwards along the sliding groove positions 250, and stop when the sliding groove positions are limited, and at the moment, the cold plates are in contact with the plasma bags, so that the purpose of quickly freezing plasma is achieved. The cold plate also has the same reason when descending, and the cold plate can realize the purpose of taking and placing the plasma bag after descending, which is not repeated here. The five-layer cold plate can quickly freeze four-tray plasma bags, the space utilization rate is improved, nearly thirty thousand milliliters of plasma can be borne for quick freezing, and the freezing efficiency is improved.
Four guide rods 260 are further disposed at four corners of the main body frame 100, and the guide rods 260 are fixed to the main body frame 100 and used for guiding the multi-layer cold plate to move up and down. The guide rods 260 are located between the multi-layer plates, and are respectively provided with an elastic component, wherein the elastic component can be a spring or a buffer component and is used for preventing the plasma bag from being extruded and exploded when the multi-layer cold plates move.
As shown in fig. 5, the dual-cylinder synchronous control system of a plasma freezer provided in the present application further comprises an air pump 510, an air reservoir 520, an electromagnetic directional valve set and a manual speed control valve set, the electromagnetic directional valve set comprises a first electromagnetic directional valve 531, a second electromagnetic directional valve 532, a third electromagnetic directional valve 533 and a fourth electromagnetic directional valve 534, the manual speed control valve set comprises a first manual speed control valve 541, a second manual speed control valve 542, a third manual speed control valve 543 and a fourth manual speed control valve 544, an air outlet of the air pump 510 is connected to an air inlet of the air reservoir 520, an air outlet of the air reservoir 520 is divided into two paths, one path is connected to an air inlet of the first electromagnetic directional valve 531, the other path is connected to an air inlet of the second electromagnetic directional valve 532, an air outlet of the first electromagnetic directional valve is connected to an air inlet of the third electromagnetic directional valve 533, an air outlet of the second electromagnetic directional valve 532 is connected to an air inlet of the fourth electromagnetic directional valve 534, an air outlet I of the third electromagnetic directional valve 533 is connected with a lever cavity of the first cylinder 300 through the first manual speed regulating valve 541, an air outlet II of the third electromagnetic directional valve 533 is connected with a lever cavity of the first cylinder 300 through the third manual speed regulating valve 543, an air outlet I of the fourth electromagnetic directional valve 534 is connected with a lever cavity of the second cylinder 400 through the second manual speed regulating valve 542, and an air outlet II of the fourth electromagnetic directional valve 534 is connected with a lever cavity of the second cylinder 400 through the fourth manual speed regulating valve 544.
In this embodiment, the first electromagnetic directional valve 531 and the second electromagnetic directional valve 532 are two-position three-way valves, the third electromagnetic directional valve 533 and the fourth electromagnetic directional valve 534 are two-position five-way valves, and the exhaust ports of the first electromagnetic directional valve 531 and the second electromagnetic directional valve 532 are blocked, so that no gas leaks from the first electromagnetic directional valve 531 and the second electromagnetic directional valve 532 when the first electromagnetic directional valve 532 is not powered.
As shown in fig. 5, when the electromagnet DT1 of the first electromagnetic directional valve 531, the electromagnet DT2 of the second electromagnetic directional valve 532, the electromagnet DT3 of the fourth electromagnetic directional valve 534, and the electromagnet DT5 of the third electromagnetic directional valve 533 are energized, and the electromagnet DT4 of the fourth electromagnetic directional valve 534 and the electromagnet DT6 of the third electromagnetic directional valve 533 are not energized, both the first cylinder 300 and the second cylinder 400 are pushed out and the lift table is raised. The rising speed of the first cylinder 300 can be adjusted by the third manual speed-adjusting valve 543 and the rising speed of the second cylinder 400 can be adjusted by the fourth manual speed-adjusting valve 544. When the electromagnet DT1 of the first electromagnetic directional valve 531, the electromagnet DT2 of the second electromagnetic directional valve 532, the electromagnet DT4 of the fourth electromagnetic directional valve 534, and the electromagnet DT6 of the third electromagnetic directional valve 533 are energized, the electromagnet DT3 of the fourth electromagnetic directional valve 534, and the electromagnet DT5 of the third electromagnetic directional valve 533 are not energized, both the first cylinder 300 and the second cylinder 400 retract, and the lift table descends. The descending speed of the first cylinder 300 may be adjusted by the first manual speed-adjusting valve 541 and the descending speed of the second cylinder 400 may be adjusted by the second manual speed-adjusting valve 542. When the electromagnet DT1 of the first electromagnetic directional valve 531 and the electromagnet DT2 of the second electromagnetic directional valve 532 are not energized, the exhaust ports of the first electromagnetic directional valve 531 and the second electromagnetic directional valve 532 are blocked, the gas in the first cylinder 300 and the second cylinder 400 cannot overflow, and the upper and lower cold plates are kept stationary.
As shown in fig. 6, the method for controlling the plasma freezer synchronously by using the dual-cylinder synchronous control system according to any of the embodiments of the present application specifically includes the following steps:
step 101: the controller receives a signal sent by an operator to obtain a received signal;
step 102: the controller supplies power to the electromagnetic directional valve according to the received signal;
step 103: the first sensor detects the displacement distance of the first cylinder to obtain a first displacement value, and the second sensor detects the displacement distance of the second cylinder to obtain a second displacement value;
step 104: the controller performs difference on the first displacement value and the second displacement value to obtain a displacement difference value, and compares the absolute value of the displacement difference value with a standard difference value;
step 105: if the absolute value of the displacement difference is larger than the standard difference and the displacement difference is positive, the controller stops supplying power to the first electromagnetic reversing valve until the first displacement value is the same as the second displacement value, and continues supplying power to the first electromagnetic reversing valve;
step 106: and if the absolute value of the displacement difference is greater than the standard difference and the displacement difference is negative, the controller stops supplying power to the second electromagnetic directional valve until the second displacement value is the same as the first displacement value, and the controller continues supplying power to the second electromagnetic directional valve.
The received signal in step 101 may comprise one of a signal to raise the cold plate, a signal to lower the cold plate, and a signal to hold the cold plate stationary.
The controller in step 102 supplies power to the electromagnetic directional valve according to the received signal, and specifically includes:
if the received signal is a signal for lifting the cold plate, the controller controls the first electromagnetic directional valve electromagnet DT1, the second electromagnetic directional valve electromagnet DT2, the fourth electromagnetic directional valve electromagnet DT3 and the third electromagnetic directional valve electromagnet DT5 to be electrified, the fourth electromagnetic directional valve electromagnet DT4 and the third electromagnetic directional valve electromagnet DT6 are not electrified, the first air cylinder and the second air cylinder are ejected outwards, and the lifting platform is lifted;
if the received signals are signals for enabling the cold plate to descend, the controller controls the first electromagnetic reversing valve electromagnet DT1, the second electromagnetic reversing valve electromagnet DT2, the fourth electromagnetic reversing valve electromagnet DT4, the third electromagnetic reversing valve electromagnet DT6 to be electrified, the fourth electromagnetic reversing valve electromagnet DT3 and the third electromagnetic reversing valve electromagnet DT5 to be not electrified, the first air cylinder and the second air cylinder both retract, and the lifting platform descends;
if the received signal is a signal for keeping the cold plate immovable, the controller controls the upper and lower cold plates to keep immovable when the first electromagnetic reversing valve electromagnet DT1 and the second electromagnetic reversing valve electromagnet DT2 are not electrified.
The controller in step 102 supplies power to the electromagnetic directional valve according to the received signal, and further includes:
the controller controls the third manual speed regulating valve to regulate the ascending speed of the first cylinder, and the controller controls the fourth manual speed regulating valve to regulate the ascending speed of the second cylinder;
the controller controls the first manual speed regulating valve to regulate the descending speed of the first cylinder, and the controller controls the second manual speed regulating valve to regulate the descending speed of the second cylinder.
The standard difference value may be set and stored in the controller in step 104.
According to the double-cylinder synchronous control system and the control method, the first cylinder and the second cylinder are controlled independently, the displacement sensors are arranged on the first cylinder and the second cylinder respectively, the moving distances of the first cylinder and the second cylinder are detected respectively, the cylinders are adjusted respectively by comparing the moving distances of the first cylinder and the second cylinder, and the purpose of keeping the lifting platform horizontal is achieved. The system can still keep the level of the cold plate to rise under the condition that loads on two sides of the cold plate are different, the problem of uneven gravity on a platform is solved, and meanwhile, the double-cylinder synchronous control system is simple in structural design, low in cost, high in practicability and control accuracy, capable of improving the freezing efficiency and reducing the faults and losses of equipment.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (7)
1. A double-cylinder synchronous control system of a plasma instant freezer is characterized by comprising a main body frame, a driving assembly, a detection assembly and a controller, wherein multiple layers of cold plates are arranged in the main body frame, the multiple layers of cold plates are more than two layers, the driving assembly comprises a first cylinder, a second cylinder and a lifting platform, the lifting platform is arranged below the lowest layer of cold plate, the first cylinder and the second cylinder are respectively arranged at two ends of the lifting platform, the lifting platform is driven by the first cylinder and the second cylinder to drive the multiple layers of cold plates to move up and down in the main body frame, the detection assembly comprises a first displacement sensor and a second displacement sensor, the first displacement sensor and the second displacement sensor are respectively arranged on the first cylinder and the second cylinder and are used for respectively detecting the moving distance of the first cylinder and the second cylinder, the controller is respectively connected with the first air cylinder, the second air cylinder, the first displacement sensor and the second displacement sensor;
a first mounting seat and a second mounting seat are symmetrically arranged at two ends of the lifting platform, the first air cylinder is mounted on the first mounting seat, a first connecting plate is further arranged on the first mounting seat, the top end of the first displacement sensor is connected with the top end of the first air cylinder through the first connecting plate, and the first displacement sensor and the first air cylinder are mounted in parallel; the second cylinder is arranged on the second mounting seat, a second connecting plate is further arranged on the second mounting seat, the top end of the second displacement sensor is connected with the top end of the second cylinder through the second connecting plate, and the second displacement sensor and the second cylinder are arranged in parallel;
the double-cylinder synchronous control system also comprises an air pump, an air storage tank and an electromagnetic reversing valve group, wherein the electromagnetic reversing valve group comprises a first electromagnetic reversing valve, a second electromagnetic reversing valve, a third electromagnetic reversing valve and a fourth electromagnetic reversing valve; the first electromagnetic directional valve and the second electromagnetic directional valve are two-position three-way valves, the third electromagnetic directional valve and the fourth electromagnetic directional valve are two-position five-way valves, and exhaust ports of the first electromagnetic directional valve and the second electromagnetic directional valve are blocked, so that gas does not leak when the first electromagnetic directional valve and the second electromagnetic directional valve are not powered;
the controller is used for obtaining a displacement difference value by subtracting the first displacement value from the second displacement value, and comparing the absolute value of the displacement difference value with the standard difference value; if the absolute value of the displacement difference is larger than the standard difference and the displacement difference is positive, the controller stops supplying power to the first electromagnetic reversing valve until the first displacement value is the same as the second displacement value, and continues supplying power to the first electromagnetic reversing valve; if the absolute value of the displacement difference is larger than the standard difference and the displacement difference is negative, the controller stops supplying power to the second electromagnetic reversing valve until the second displacement value is the same as the first displacement value, and continues supplying power to the second electromagnetic reversing valve;
the superiors 'cold drawing of multilayer cold drawing pass through the fixed block with main body frame top fixed connection, lower floor's cold drawing all links to each other with its upper cold drawing through connecting block and bolt, be equipped with the spout position on the connecting block, when the cold drawing removed, the bolt can remove in the spout position, four angular positions of main body frame still are provided with four guide bars, the guide bar with main body frame is fixed for lead when reciprocating for multilayer cold drawing, just be located between the multiply wood on the guide bar, still be provided with elastomeric element respectively, elastomeric element is the spring.
2. The double-cylinder synchronous control system according to claim 1, further comprising a manual speed-regulating valve set, wherein the manual speed-regulating valve set comprises a first manual speed-regulating valve, a second manual speed-regulating valve, a third manual speed-regulating valve and a fourth manual speed-regulating valve, an air outlet of the air pump is connected with an air inlet of the air storage tank, an air outlet of the air storage tank is divided into two paths, one path is connected with an air inlet of a first electromagnetic directional valve, the other path is connected with an air inlet of a second electromagnetic directional valve, an air outlet of the first electromagnetic directional valve is connected with an air inlet of a third electromagnetic directional valve, an air outlet of the second electromagnetic directional valve is connected with an air inlet of a fourth electromagnetic directional valve, an air outlet I of the third electromagnetic directional valve is connected with the lever cavity of the first cylinder through the first manual speed-regulating valve, an air outlet of the third electromagnetic directional valve is connected with the lever cavity of the first cylinder through the third manual speed-regulating valve, and the air outlet I of the fourth electromagnetic directional valve is connected with the lever cavity of the second cylinder through the second manual speed regulating valve, and the air outlet II of the fourth electromagnetic directional valve is connected with the lever-free cavity of the second cylinder through the fourth manual speed regulating valve.
3. A double-cylinder synchronous control method of a plasma instant freezer, which is characterized in that the method adopts the double-cylinder synchronous control system of claim 2 to control, and comprises the following steps:
the controller receives a signal sent by an operator to obtain a received signal;
the controller supplies power to the electromagnetic directional valve according to the received signal;
the first sensor detects the displacement distance of the first cylinder to obtain a first displacement value, and the second sensor detects the displacement distance of the second cylinder to obtain a second displacement value;
the controller performs difference on the first displacement value and the second displacement value to obtain a displacement difference value, and compares the absolute value of the displacement difference value with a standard difference value;
if the absolute value of the displacement difference is larger than the standard difference and the displacement difference is positive, the controller stops supplying power to the first electromagnetic reversing valve until the first displacement value is the same as the second displacement value, and continues supplying power to the first electromagnetic reversing valve;
and if the absolute value of the displacement difference is greater than the standard difference and the displacement difference is negative, the controller stops supplying power to the second electromagnetic directional valve until the second displacement value is the same as the first displacement value, and the controller continues supplying power to the second electromagnetic directional valve.
4. The method as claimed in claim 3, wherein the received signal includes one of a signal for lifting the cold plate, a signal for lowering the cold plate, and a signal for keeping the cold plate stationary.
5. The method for synchronously controlling the double cylinders of the plasma instant freezer according to the claim 4, wherein the step of supplying power to the electromagnetic directional valve by the controller according to the received signal comprises the following steps:
if the received signal is a signal for lifting the cold plate, the controller controls the first electromagnetic directional valve electromagnet DT1, the second electromagnetic directional valve electromagnet DT2, the fourth electromagnetic directional valve electromagnet DT3 and the third electromagnetic directional valve electromagnet DT5 to be electrified, the fourth electromagnetic directional valve electromagnet DT4 and the third electromagnetic directional valve electromagnet DT6 are not electrified, the first air cylinder and the second air cylinder are ejected outwards, and the lifting platform is lifted;
if the received signal is a signal for enabling the cold plate to descend, the controller controls the first electromagnetic directional valve electromagnet DT1, the second electromagnetic directional valve electromagnet DT2, the fourth electromagnetic directional valve electromagnet DT4 and the third electromagnetic directional valve electromagnet DT6 to be electrified, the fourth electromagnetic directional valve electromagnet DT3 and the third electromagnetic directional valve electromagnet DT5 are not electrified, the first air cylinder and the second air cylinder both retract, and the lifting platform descends;
if the received signal is a signal for keeping the cold plate immovable, the controller controls the upper and lower cold plates to keep immovable when the first electromagnetic reversing valve electromagnet DT1 and the second electromagnetic reversing valve electromagnet DT2 are not electrified.
6. The method for synchronously controlling the double cylinders of the plasma instant freezer according to the claim 5, wherein the step of supplying power to the electromagnetic directional valve by the controller according to the received signal further comprises the following steps:
the controller controls the third manual speed regulating valve to regulate the ascending speed of the first cylinder, and the controller controls the fourth manual speed regulating valve to regulate the ascending speed of the second cylinder;
the controller controls the first manual speed regulating valve to regulate the descending speed of the first cylinder, and the controller controls the second manual speed regulating valve to regulate the descending speed of the second cylinder.
7. The method for synchronously controlling the double cylinders of the plasma freezer as claimed in claim 3, wherein the standard deviation value can be set and stored in the controller.
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