CN110332158B - Hydraulic oil cooling device of extruder and control method thereof - Google Patents
Hydraulic oil cooling device of extruder and control method thereof Download PDFInfo
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- CN110332158B CN110332158B CN201910676637.5A CN201910676637A CN110332158B CN 110332158 B CN110332158 B CN 110332158B CN 201910676637 A CN201910676637 A CN 201910676637A CN 110332158 B CN110332158 B CN 110332158B
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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
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
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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
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0423—Cooling
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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
- F15B3/00—Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
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Abstract
The invention provides a hydraulic oil cooling device of an extruder, which comprises a rack, a cooling device, a filtering device, a compressing device and a controller, wherein the rack comprises a base and a plurality of supporting rods, the supporting rods are arranged on one side of the base and are vertically and fixedly connected to the base, the cooling device, the filtering device and the compressing device are respectively arranged on the base, the cooling device comprises a condenser and a circulating pipeline, the circulating pipeline and the condenser are mutually nested and coaxially arranged, and the circulating pipeline is tightly attached to the outer wall of the condenser; the filtering device and the compressing device are arranged on one side of the cooling device, the filtering device is arranged right above the compressing device 4 and is connected with a pipeline of the compressing device, and the controller is arranged on the base. According to the invention, the pressure of the filtered hydraulic oil can be increased by adopting the pressurizing device, the cooling effect after gas-liquid separation by the gas-liquid separation device is higher, and the hydraulic oil is filtered by adopting the filtering operation of the filtering device so as to realize rapid cooling of the hydraulic oil.
Description
Technical Field
The invention relates to the technical field of extruders, in particular to a hydraulic oil cooling device of an extruder and a control method thereof.
Background
The hydraulic press is a machine which uses high-pressure liquid as a working medium and is used for transferring energy to realize various processes, such as processing products of metal, plastic, rubber, wood, powder and the like, and is commonly used for a pressing process and a press forming process, and comprises a hydraulic press and an oil press. The hydraulic press uses the hydraulic pump as a power source, the hydraulic oil enters the oil cylinder or the piston through the hydraulic pipeline by the action force of the pump, and then the hydraulic oil circulates in the oil tank through the one-way valve to enable the oil cylinder or the piston to do work, thereby completing certain mechanical action. The hydraulic press is at the working process for hydraulic oil intensifies very fast owing to bear great load, and long-time the use can lead to the hydraulic oil high temperature and influence the normal operating of equipment, reduces whole hydraulic oil system's effective power, causes the unusual shut down of equipment, thereby reduces the productivity, so hydraulic oil must cool off through cooling system. However, the existing hydraulic oil cooling system has poor cooling effect, still has high oil temperature, and is easy to cause equipment abnormity or halt due to overhigh oil temperature.
For example, CN205895774U prior art discloses a hydraulic oil cooling device, a suitable temperature of hydraulic oil for a hydraulic cylinder is 35-55 ℃, during a working process of the hydraulic cylinder, due to reasons such as compression, the oil temperature gradually rises, once the oil temperature reaches above 60 ℃, the stability and working capacity of the hydraulic cylinder equipment operation are easily reduced, and the hydraulic oil is deteriorated and cannot be used, meanwhile, the oil temperature excessively overtime is too high, even leakage and failure of a hydraulic system are caused, and an unsafe accident is caused, so that timely, convenient and reliable cooling of the hydraulic oil is a reliable guarantee for safe operation of the hydraulic system. After the whole set of device is communicated with a hydraulic oil pipeline, although high-temperature oil is input in a circulating mode at proper time and the effect of reducing the oil temperature is achieved quickly through circulating heat exchange of a refrigerant, the problem that the normal operation is affected due to excessive high temperature generated by the existing hydraulic oil is solved, and the recovery and the reutilization of the hydraulic oil are not realized. Another typical prior art, such as KR20170136888(a), discloses a hydraulic oil cooling device for a vibrator, in which a hydraulic oil cooler is mainly used in a loop of a hydraulic system, and during operation, high-temperature oil in the hydraulic system flows through the hydraulic cooler device, and performs efficient heat exchange with cold air forcibly flowing in a heat exchanger, so that the oil temperature is reduced to an operating temperature to ensure that a main machine can continuously and normally operate, and the operation can be smoothly performed. But lacks a device for recycling and does not recycle the hydraulic oil. Turning to a separate hydraulic power unit as disclosed in the prior art of WO2013122531(a1), an electrically or hydraulically powered air-cooled radiator is used, the principle of which is the same as that of a fan. The practical analysis shows that the heat dissipation mode has the following defects: when the hydraulic oil is cooled by wind power, the temperature of the blown air is smaller than the ambient temperature because the temperature of the sucked air is equal to the ambient temperature, and the cooling effect is poor. Because the air-cooled radiator is similar to a fan structure, wind power is not concentrated, and meanwhile, a part of wind energy leaks through the shell gap of the radiator, so that the cooling efficiency is low. If the cooling effect of the hydraulic system of the equipment is poor, the temperature of the hydraulic oil rises, and the failure rate of the equipment (mechanism alarming, stopping working, pressure reduction and leakage increase) is increased. Especially, in some occasions where the temperature of the working environment is high and the equipment works frequently, the failure rate of the equipment is greatly increased, the working efficiency of the equipment is influenced, and the use and maintenance cost is increased.
The invention aims to solve the problems of insufficient cooling, poor cooling effect, lack of equipment for separation and filtration, lack of a circulating pipeline and the like in the field.
Disclosure of Invention
The invention aims to provide a hydraulic oil cooling device of an extruding machine and a control method thereof, aiming at the defects of the cooling efficiency of the hydraulic oil of the extruding machine at present.
In order to overcome the defects of the prior art, the invention adopts the following technical scheme:
a hydraulic oil cooling device of an extruder comprises a rack, a cooling device, a filtering device, a compressing device and a controller, wherein the rack comprises a base and a plurality of supporting rods, the supporting rods are arranged on one side of the base and are vertically and fixedly connected to the base, the cooling device, the filtering device and the compressing device are respectively arranged on the base, the cooling device comprises a condenser and a circulating pipeline, the circulating pipeline and the condenser are mutually nested and coaxially arranged, and the circulating pipeline is tightly attached to the outer wall of the condenser; the filtering device and the compressing device are arranged on one side of the cooling device, the filtering device is arranged right above the compressing device and is connected with the compressing device through a pipeline, and the controller is arranged on the base.
Optionally, filter equipment is including filtering appearance chamber, a plurality of layers of filter screen, discharge gate and feed inlet, filter the appearance chamber with base parallel arrangement, each layer the filter screen sets up filter the appearance intracavity just the filter screen with filter appearance chamber sliding connection, the discharge gate sets up filter the last top surface that holds the chamber, the discharge gate sets up filter the lower bottom surface that holds the chamber, filter equipment still includes the booster pump, the booster pump sets up filter the outer wall that holds the chamber and with filter the chamber intercommunication, the both sides of each layer filter screen all are equipped with detection sensor.
Optionally, the compressing device includes a cylinder, a gas-liquid separating device, a purifying mechanism connected to the condenser, an exchanger, a turbo expander and a booster pump, the exchanger is in flow communication with the purifying mechanism to cool, the gas-liquid separating device is connected with the purifying mechanism through a pipeline, two ends of the purifying mechanism are respectively connected with the cooling device and the exchanger, and the booster pump is arranged on the inner wall of the cylinder and is communicated with the inside of the cylinder.
Optionally, the gas-liquid separation device further has a bifurcated flow path positioned between the purge mechanism and the constant velocity turboexpander to receive a flow of compressed refrigerant air to vary cooling of the hydraulic oil.
Optionally, the gas-liquid separation device of the compression device is provided with a plurality of pressure sensors, each pressure sensor is respectively provided with an outlet or an inlet of each pipeline, a plurality of pressure sensors are arranged in the cylinder, and each pressure sensor is respectively electrically connected with the controller.
Optionally, the cooling device, the filtering device and the compressing device are respectively communicated through a pipeline, and a flow control valve and a control switch are respectively arranged on the pipeline.
In addition, the invention also provides a control method of the hydraulic oil cooling device of the extruding machine, which comprises the following steps: and collecting signals transmitted by the pressure sensors, and when the sensor detects that the air pressure in the compression device is too low, transmitting the signals to the controller, wherein the controller controls the booster pump of the compression device, and the booster pump starts to recover the air pressure of the compression device.
Optionally, the control method includes: hydraulic oil of the extruder enters the filtering device through the feed port and is stored in the filtering cavity, and the detecting devices on two sides of the filter screen detect the particle concentration of the hydraulic oil of the filter screen in real time;
if the particle concentration of the hydraulic oil at the lowest layer does not reach a set value, the hydraulic oil returns to a feed port of the filtering device through a return channel; and if the particle concentration of the hydraulic oil at the lowest layer reaches a set value, the hydraulic oil enters the compression device through the discharge hole.
Optionally, the control method includes: the compression device is pressurized, then is subjected to gas-liquid separation operation transmitted to the gas-liquid separation device through the pipeline, and then is subjected to constant flow of the turbine expander, and hydraulic oil passing through the circulation pipeline is fully cooled.
Optionally, the control method includes: the inner wall of the circulation pipeline is provided with a plurality of temperature sensors, each temperature sensor detects the temperature of the hydraulic oil in the circulation pipeline in real time and transmits the temperature to the controller, and the controller controls the temperature of the condenser to exchange heat with the circulation pipeline.
The beneficial effects obtained by the invention are as follows:
1. the filtering operation of the filtering device is adopted, so that the hydraulic oil is filtered, and then the primary filtering operation of the hydraulic oil is ensured, thereby being more beneficial to cooling the hydraulic oil;
2. the pressure of the filtered hydraulic oil can be increased by adopting the pressurizing device, and the cooling effect is higher after gas-liquid separation through the gas-liquid separation device;
3. through the condenser and the circulation pipeline of the cooling device, the cooling efficiency of the hydraulic oil is higher, the hydraulic oil is ensured to have no redundant bubbles, and the repeated use of the hydraulic oil is facilitated;
4. through adopting the backflow pipeline, filtration operation many times guarantees that the impurity in the filterable hydraulic oil filters away, guarantees follow-up refrigerated cooling efficiency.
Drawings
The invention will be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.
FIG. 1 is a schematic view showing the construction of a hydraulic oil cooling apparatus for an extruder according to the present invention.
FIG. 2 is a front view of a hydraulic oil cooling device of an extruder of the present invention.
FIG. 3 is a rear view of an extruder hydraulic oil cooling apparatus of the present invention.
FIG. 4 is a right side view of an extruder hydraulic oil cooling apparatus of the present invention.
Fig. 5 is a left side view of an extruder hydraulic oil cooling device of the present invention.
FIG. 6 is a plan view of an extruder hydraulic oil cooling apparatus of the present invention.
Detailed Description
In order to make the objects and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following embodiments; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Other systems, methods, and/or features of the present embodiments will become apparent to those skilled in the art upon review of the following detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the accompanying claims. Additional features of the disclosed embodiments are described in, and will be apparent from, the detailed description that follows.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper" and "lower" and "left" and "right" etc., it is only for convenience of description and simplification of the description based on the orientation or positional relationship shown in the drawings, but it is not indicated or implied that the device or assembly referred to must have a specific orientation.
The first embodiment is as follows: a hydraulic oil cooling device of an extruder comprises a rack, a cooling device 3, a filtering device 1, a compressing device 4 and a controller, wherein the rack comprises a base and a plurality of supporting rods, the supporting rods are arranged on one side of the base and are vertically and fixedly connected to the base, the cooling device, the filtering device and the compressing device are respectively arranged on the base, the cooling device 3 comprises a condenser and a circulating pipeline, the circulating pipeline and the condenser are mutually nested and coaxially arranged, and the circulating pipeline is tightly attached to the outer wall of the condenser; the filtering device 1 and the compressing device 4 are arranged on one side of the cooling device, the filtering device 1 is arranged right above the compressing device 4 and is connected with the compressing device through a pipeline, and the controller is arranged on the base. Filter equipment 1 is including filtering appearance chamber, a plurality of layers of filter screen, discharge gate and feed inlet, filter the appearance chamber with base parallel arrangement, each layer the filter screen sets up filter the appearance intracavity just the filter screen with filter appearance chamber sliding connection, the discharge gate sets up filter the last top surface that holds the chamber, the discharge gate sets up filter the lower bottom surface that holds the chamber, filter equipment 1 still includes the booster pump, the booster pump sets up filter the outer wall that holds the chamber and with filter the chamber intercommunication, the both sides of each layer filter screen all are equipped with detection sensor. The compression device 4 comprises an air cylinder, a gas-liquid separation device 5, a purification mechanism connected to the condenser, an exchanger which is cooled by flow communication with the purification mechanism, a turbine expander 12 and a booster pump, the gas-liquid separation device 15 is connected with the purification mechanism through a pipeline, two ends of the purification mechanism are respectively connected with the cooling device and the exchanger, and the booster pump is arranged on the inner wall of the air cylinder and is communicated with the inside of the air cylinder. The gas-liquid separation device 5 also has a bifurcated flow path positioned between the purge mechanism and the constant velocity turboexpander 12 to receive a flow of compressed refrigerant air to vary the cooling of the hydraulic oil. The gas-liquid separation device 5 of the compression device 4 is provided with a plurality of pressure sensors, each pressure sensor is respectively provided with an outlet or an inlet of each pipeline, a plurality of pressure sensors are arranged in the cylinder, and each pressure sensor is respectively electrically connected with the controller. The cooling device 3, the filtering device 1 and the compressing device 4 are communicated through pipelines respectively, and flow control valves and control switches are arranged on the pipelines respectively.
In addition, the invention also provides a control method of the hydraulic oil cooling device of the extruding machine, which comprises the following steps: and collecting signals transmitted by each pressure sensor, and when the sensor detects that the air pressure in the compression device 4 is too low, transmitting the signals to the controller, wherein the controller controls the booster pump of the compression device, and the booster pump starts to recover the air pressure of the compression device. The control method comprises the following steps: hydraulic oil of the extruder enters the filtering device through the feed port and is stored in the filtering cavity, and the detecting devices on two sides of the filter screen detect the particle concentration of the hydraulic oil of the filter screen in real time; if the particle concentration of the hydraulic oil at the lowest layer does not reach a set value, the hydraulic oil returns to a feed port of the filtering device through a return channel; and if the particle concentration of the hydraulic oil at the lowest layer reaches a set value, the hydraulic oil enters the compression device through the discharge hole. The control method comprises the following steps: the compression device is pressurized, then subjected to gas-liquid separation operation transmitted to the gas-liquid separation device 5 through the pipeline, then subjected to constant flow of the turboexpander 12, and fully cooled by hydraulic oil passing through the circulation pipeline. The control method comprises the following steps: the inner wall of the circulation pipeline is provided with a plurality of temperature sensors, each temperature sensor detects the temperature of the hydraulic oil in the circulation pipeline in real time and transmits the temperature to the controller, and the controller controls the temperature of the condenser to exchange heat with the circulation pipeline.
Example two: a hydraulic oil cooling device of an extruder comprises a rack, a cooling device 3, a filtering device 1, a compressing device 4 and a controller, wherein the rack comprises a base and a plurality of supporting rods, the supporting rods are arranged on one side of the base and are vertically and fixedly connected to the base, the cooling device, the filtering device and the compressing device are respectively arranged on the base, the cooling device 3 comprises a condenser and a circulating pipeline, the circulating pipeline and the condenser are mutually nested and coaxially arranged, and the circulating pipeline is tightly attached to the outer wall of the condenser; the filtering device 1 and the compressing device 4 are arranged on one side of the cooling device, the filtering device 1 is arranged right above the compressing device 4 and is connected with the compressing device through a pipeline, and the controller is arranged on the base. Specifically, the condenser comprises a shell, condenser tubes and a buffer plate; be equipped with the feed inlet on the shell, the shell has the discharge gate, and the middle part is equipped with the condensation shell and manages in the shell, and the condensation shell and pipe is equipped with coolant liquid inlet and cool coolant liquid export, is equipped with umbrella-type buffer board on the condensation shell and manages in the shell, is provided with the aperture on the buffer board, and the aperture diameter is crescent to the periphery by the centre. Namely: an umbrella-shaped buffer plate is arranged on the condensing tube in the shell, and small holes are arranged on the buffer plate, and the diameter of each small hole is gradually increased from the middle to the periphery. Steam enters the shell from the feed inlet, diffuses on the buffer plate after encountering the buffer plate, flows out of the small holes in the buffer plate and enters the condensation tubes, and the utilization rate of the peripheral tubes is increased, so that the condensation effect is enhanced. The setting of condensation tubulation is guaranteed the refrigerated efficiency of condenser for the heat that hydraulic oil produced in the extrusion process can be quick distribute away, guarantees the cooling efficiency of whole extruder hydraulic oil. The circulation pipeline is arranged on the periphery of the condenser, and meanwhile, the circulation pipeline sequentially surrounds along the periphery of the condenser, so that the circulation pipeline can conduct rapid heat dissipation. In addition, the condenser is also connected with the controller, and the controller controls the starting time of the condenser. Meanwhile, a temperature detection device is further arranged on the condenser and used for detecting the condensation temperature of the condenser. When the temperature detection device detects that the temperature of the condenser is lower than a set value, the condenser transmits the control signal to the controller, and the controller controls the condenser to perform refrigeration operation. When the temperature detection device detects that the current temperature of the condenser is higher than a set value, the temperature detection device transmits a control signal to the controller, the controller controls the condenser to stop refrigerating, and the condenser is always kept at the set value temperature, so that deviation cannot exist. The condenser is provided with a discharge hole, a pipeline of the discharge hole is provided with an output nozzle 10, the output nozzle is fixedly connected with the pipeline of the discharge hole in a vertical mode and communicated with the interior of the pipeline, and therefore cooled hydraulic oil can be discharged rapidly to achieve recycling.
The compression device 4 comprises an air cylinder, a gas-liquid separation device 5, a purification mechanism connected to the condenser, an exchanger which is cooled by flow communication with the purification mechanism, a turbine expander 12 and a booster pump, the gas-liquid separation device 15 is connected with the purification mechanism through a pipeline 12, two ends of the purification mechanism are respectively connected with the cooling device and the exchanger, and the booster pump is arranged on the inner wall of the air cylinder and communicated with the inside of the air cylinder. The gas-liquid separation device 5 of the compression device 4 is provided with a plurality of pressure sensors, each pressure sensor is respectively provided with an outlet or an inlet of each pipeline, a plurality of pressure sensors are arranged in the cylinder, and each pressure sensor is respectively electrically connected with the controller. The gas-liquid separation device 5 also has a bifurcated flow path positioned between the purge mechanism and the constant velocity turboexpander 12 to receive a flow of compressed refrigerant air to vary the cooling of the hydraulic oil. Specifically, the cylinder of the compressing device 4 is connected with the booster pump and ensures that the pressure in the cylinder is always kept in a set range. The air pressure in the air cylinder and the set value are always kept at a certain set value, and when the pressure in the air cylinder is reduced, the booster pump can rapidly work under the control of the controller, so that the pressure in the air cylinder is always kept at the set value; in addition, when the air pressure value of the air cylinder is overlarge, the air cylinder can perform air exhaust operation through the air exhaust channel, so that the compressed high-pressure air of the air cylinder can be stabilized at a set value. The stabilization of the compressed gas of the cylinder is particularly important for the cooling efficiency of the hydraulic oil. In this embodiment, the air outlet 11 of the air cylinder is connected to the gas-liquid separation device 5, so as to realize rapid gas-liquid separation under the action of high-pressure gas, and the liquid will pass through the pipeline and be connected to the cooling device, and in the connection process, the liquid will be subjected to the secondary filtering operation of the filtering mechanism, so that the hydraulic oil is cleaner, and the cooled hydraulic oil can be rapidly put into the next use. The cylinder is also provided with a pressure indicating gauge 7, and the direction of the indicating gauge 7 far away from the base extends out vertically.
In addition, compression device 4 each of the cylinder pressure sensor can detect the value of the pressure in the cylinder to transmit this pressure value to on the controller, the controller carries out overall compromise and makes the cylinder can be right hydraulic oil carries out gas-liquid separation or through the operation of the refrigerated air of turboexpander 12 makes the cooling effect of whole hydraulic oil reach more efficient effect. The gas-liquid separation device 5 further has a branched flow path so that the whole device is provided with a plurality of cooling devices to perform cooling operation on the hydraulic oil, so that the efficiency of cooling the hydraulic oil by the whole device is more efficient.
The cooling device 3, the filtering device 1 and the compressing device 4 are communicated through pipelines respectively, and the pipelines are provided with a flow control valve 8 and a control switch respectively. Specifically, be provided with on the cooling device 3 flow control valve 8 can control the entering flow and the speed of the hydraulic oil in the cooling device make through cooling device cools off hydraulic oil can more accurately reach more efficient cooling effect. Similarly, the flow control valve 8 is also arranged on the pipeline of the feed port of the filtering device 1, and the flow control valve 8 can make the flow of the hydraulic oil entering the filtering device 1 more stable and can also promote the filtering efficiency of the whole device. In addition, the compression device 4 is provided with the flow control valve 8, so that compressed high-pressure gas in the pipeline can smoothly pass through the flow control valve 8, and the opening and closing degree of the flow control valve 8 can be controlled, so that the high-pressure gas passes through the flow control valve, and the cooling efficiency of the hydraulic oil is ensured.
In addition, the invention also provides a control method of the hydraulic oil cooling device of the extruding machine, which comprises the following steps: and collecting signals transmitted by each pressure sensor, and when the sensor detects that the air pressure in the compression device 4 is too low, transmitting the signals to the controller, wherein the controller controls the booster pump of the compression device, and the booster pump starts to recover the air pressure of the compression device. Specifically, the signals of the pressure sensors are collected, and the pressure of the air cylinder of the shuttle tree compressing device 4 is controlled in real time, so that the whole compressing device can be used in an automatic cycle manner, and is beneficial to automatic control. The hydraulic oil can be cooled quickly and efficiently under the action of no manual operation.
The control method comprises the following steps: hydraulic oil of the extruder enters the filtering device 1 through the feeding hole and is stored in the filtering cavity, and the detecting devices on two sides of the filter screen detect the particle concentration of the hydraulic oil of the filter screen in real time; if the particle concentration of the hydraulic oil at the lowest layer does not reach a set value, the hydraulic oil returns to a feed port of the filtering device through a return channel; and if the particle concentration of the hydraulic oil at the lowest layer reaches a set value, the hydraulic oil enters the compression device through the discharge hole. Specifically, the filter device 1 performs the filtering operation by each layer of filter net, so that the filtering operation of the hydraulic oil through each filter net can be efficiently filtered. In addition, filter equipment 1 still is equipped with the backward flow passageway, the backward flow passageway makes hydraulic oil can pass through a lot of filtration, makes the particulate impurity that exists can be quick filters in the hydraulic oil to at the filterable in-process of repeated operation, guarantee that hydraulic oil is cleaner, more favourable to subsequent cooling.
The control method comprises the following steps: the compression device is pressurized, then subjected to gas-liquid separation operation transmitted to the gas-liquid separation device 5 through the pipeline, then subjected to constant flow of the turboexpander 12, and fully cooled by hydraulic oil passing through the circulation pipeline. Specifically, the turbo-expander 2 is disposed right above the cooling device so that the gas can be discharged to the outside without interfering with the device after the gas and liquid are separated, and the turbo-expander 2 is provided with a gas discharge nozzle 9. In addition, in the present embodiment, the turbo-expander 2 is preferably installed directly above the cooling device. The turboexpander 2 is also connected with the cooling device through a pipeline, so that the separated hydraulic oil can enter the cooling device for cooling operation. The control method comprises the following steps: the inner wall of the circulation pipeline is provided with a plurality of temperature sensors, each temperature sensor detects the temperature of the hydraulic oil in the circulation pipeline in real time and transmits the temperature to the controller, and the controller controls the temperature of the condenser to exchange heat with the circulation pipeline.
Example three: on the basis of embodiment two, the structure of the cooling tube of the cooling device of this embodiment can replace and trade into each the cooling tube sets up in the condenser, each be parallel to each other between the cooling tube to with certain distance parallel arrangement, it is specific, each the cooling tube can with hydraulic oil contacts, makes hydraulic oil can be quick cools off.
In summary, according to the hydraulic oil cooling device for the extruder and the control method thereof, the filtering operation of the filtering device is adopted, so that the hydraulic oil is filtered, and then the preliminary filtering operation of the hydraulic oil is ensured, so that the cooling of the hydraulic oil is facilitated; the pressure of the filtered hydraulic oil can be increased by adopting the pressurizing device, and the cooling effect is higher after gas-liquid separation through the gas-liquid separation device; through the condenser and the circulation pipeline of the cooling device, the cooling efficiency of the hydraulic oil is higher, the hydraulic oil is ensured to have no redundant bubbles, and the repeated use of the hydraulic oil is facilitated; through adopting the backflow pipeline, filtration operation many times guarantees that the impurity in the filterable hydraulic oil filters away, guarantees follow-up refrigerated cooling efficiency.
Although the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the invention. That is, the methods, systems, and devices discussed above are examples. Various configurations may omit, substitute, or add various procedures or components as appropriate. For example, in alternative configurations, the methods may be performed in an order different than that described, and/or various components may be added, omitted, and/or combined. Moreover, features described with respect to certain configurations may be combined in various other configurations, as different aspects and elements of the configurations may be combined in a similar manner. Further, elements therein may be updated as technology evolves, i.e., many elements are examples and do not limit the scope of the disclosure or claims.
Specific details are given in the description to provide a thorough understanding of the exemplary configurations including implementations. However, configurations may be practiced without these specific details, for example, well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary detail in order to avoid obscuring the configurations. This description provides example configurations only, and does not limit the scope, applicability, or configuration of the claims. Rather, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made in the function and arrangement of elements without departing from the spirit or scope of the disclosure.
In conclusion, it is intended that the foregoing detailed description be regarded as illustrative rather than limiting, and that it be understood that these examples are illustrative only and are not intended to limit the scope of the invention. After reading the description of the invention, the skilled person can make various changes or modifications to the invention, and these equivalent changes and modifications also fall into the scope of the invention defined by the claims.
Claims (7)
1. A hydraulic oil cooling device of an extruder comprises a rack, a cooling device (3), a filtering device (1), a compressing device (4) and a controller, and is characterized in that the rack comprises a base and a plurality of supporting rods, the supporting rods are arranged on one side of the base and are vertically and fixedly connected to the base, the cooling device, the filtering device and the compressing device are respectively arranged on the base, the cooling device (3) comprises a condenser and a circulating pipeline, the circulating pipeline and the condenser are mutually nested and coaxially arranged, and the circulating pipeline is tightly attached to the outer wall of the condenser; the filtering device (1) and the compressing device (4) are arranged on one side of the cooling device, the filtering device (1) is arranged right above the compressing device (4) and is connected with the compressing device through a pipeline, and the controller is arranged on the base;
the compression device (4) comprises an air cylinder, a gas-liquid separation device (5), a purification mechanism connected to the condenser, an exchanger which is in flow communication with the purification mechanism for cooling, a turbo expander (12) and a second booster pump, wherein the gas-liquid separation device (15) is connected with the purification mechanism through a pipeline, two ends of the purification mechanism are respectively connected with the cooling device and the exchanger, and the second booster pump is arranged on the inner wall of the air cylinder and is communicated with the interior of the air cylinder;
the filter device (1) comprises a filter cavity, a plurality of layers of filter screens, a discharge hole and a feed hole, wherein the filter cavity is arranged in parallel with the base, each layer of filter screen is arranged in the filter cavity, the filter screens are connected with the filter cavity in a sliding manner, the feed hole is arranged on the upper top surface of the filter cavity, the discharge hole is arranged on the lower bottom surface of the filter cavity, the filter device (1) further comprises a first booster pump, the first booster pump is arranged on the outer wall of the filter cavity and communicated with the filter cavity, and detection sensors are arranged on two sides of each layer of filter screen;
the gas-liquid separation device (5) of the compression device (4) is provided with a plurality of pressure sensors, each pressure sensor is respectively arranged at an outlet or an inlet of each pipeline, a plurality of pressure sensors are arranged in the cylinders, and each pressure sensor is respectively electrically connected with the controller.
2. An extruder hydraulic oil cooling arrangement as claimed in claim 1, characterised in that the gas-liquid separation device (5) also has a divergent flow path positioned between the purge means and the constant velocity turboexpander (12) to receive a flow of compressed refrigeration air to vary the cooling of the hydraulic oil.
3. The cooling device for hydraulic oil of an extruder according to claim 1, wherein the cooling device (3), the filtering device (1) and the compressing device (4) are communicated with each other through pipelines, and the pipelines are respectively provided with a flow control valve and a control switch.
4. A control method of an extruder hydraulic oil cooling device applied to an extruder hydraulic oil cooling device according to any one of claims 1 to 3, characterized by comprising: and collecting signals transmitted by the pressure sensors, transmitting the signals to the controller when the pressure sensors detect that the air pressure in the compression device (4) is too low, controlling the second booster pump of the compression device by the controller, and starting the second booster pump to recover the air pressure of the compression device.
5. The method for controlling the hydraulic oil cooling device of an extruding machine according to claim 4, wherein the method for controlling comprises: hydraulic oil of the extruder enters the filtering device through the feed port and is stored in the filtering cavity, and the detection sensors on two sides of the filter screen detect the particle concentration of the hydraulic oil on two sides of the filter screen in real time;
if the particle concentration of the hydraulic oil at the lowest layer does not reach a set value, the hydraulic oil returns to a feed port of the filtering device through a return channel; and if the particle concentration of the hydraulic oil at the lowest layer reaches a set value, the hydraulic oil enters the compression device through the discharge hole.
6. The method for controlling the hydraulic oil cooling device of an extruding machine according to claim 4, wherein the method for controlling comprises: after being pressurized by the compression device, the hydraulic oil is transmitted to the gas-liquid separation device (5) through the pipeline for gas-liquid separation, and after the separated hydraulic oil passes through the constant flow of the turboexpander (12), the hydraulic oil is fully cooled through the circulation pipeline.
7. The method for controlling the hydraulic oil cooling device of an extruding machine according to claim 4, wherein the method for controlling comprises: the inner wall of the circulation pipeline is provided with a plurality of temperature sensors, each temperature sensor detects the temperature of the hydraulic oil in the circulation pipeline in real time and transmits the temperature to the controller, and the controller controls the temperature of the condenser by controlling heat exchange with the circulation pipeline.
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