CO2 gas temperature control and dry ice particle treatment coupling system, application and method

Abstract

The invention discloses a CO2 gas temperature control and dry ice particle treatment coupling system, application and method, solves the problem that the CO2 gas temperature is inconvenient to control in the low-temperature processing process in the prior art, and has the beneficial effect of effectively controlling the CO2 gas temperature. The gas temperature control unit comprises a working cavity, the working cavity comprises a plurality of gas chambers, every two adjacent gas chambers can be connected or disconnected, one side of the working cavity is communicated with a first storage tank, the first storage tank provides heat exchange media for the working cavity, and the gas chambers are communicated with a second storage tank so as to temporarily store the heat exchange media after heat exchange. The first storage tank is communicated with the second storage tank; the dry ice particle treatment unit comprises gas pipelines arranged in the gas chambers, the gas pipelines are arranged in the corresponding gas chambers in a bent mode, the gas pipelines of every two adjacent gas chambers are communicated, and the gas pipelines are used for low-temperature CO2 to pass through.

Description

Technical Field

[0001] The present invention relates to the field of mechanical processing technology, in particular to a CO2 gas temperature control and dry ice particle processing coupling system, application and method. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] With the rapid development of high-end equipment in various fields, efficient, precise and low-damage processing of difficult-to-process titanium alloy materials has become a key technology in the advanced manufacturing main technology group. However, due to its low thermal conductivity, low elastic modulus, high chemical activity and other characteristics, the force and heat in the cutting zone of titanium alloys rise sharply during cutting (especially grinding), which can easily lead to problems such as rapid tool wear and low material removal rate, and serious loss of processing surface quality and processing accuracy. It can be seen that as a typical difficult-to-process material, titanium alloys have extremely high requirements for the cutting environment.

[0004] In industry, the use of water-based coolants for cooling and lubrication is the most common method. When using traditional coolants to process Ti-6Al-4V, the cutting speed range is only 30-60m / min. In addition, traditional pouring cutting fluids contain harmful substances such as nitrites, which not only threaten the environment and the health of operators, but also greatly increase the cost of cutting fluid post-processing, which can no longer meet the current green and efficient requirements.

[0005] To achieve a cleaner production process, some green manufacturing technologies such as minimum quantity lubrication (MQL), cryogenic minimum quantity lubrication (CMQL) and nanofluid minimum quantity lubrication (NMQL) have been developed to effectively improve machining performance and reduce hazards.

[0006] As an environmentally friendly process, MQL can improve the overall machining quality to a certain extent. Under different cutting conditions, MQL has improved tool life and surface quality compared with dry cutting. Although the effectiveness of MQL has been proven by a large number of studies, some scholars have found that due to insufficient airflow cooling capacity, the machinability of MQL is limited when machining difficult-to-machine materials at high speeds, which may lead to large cutting forces, excessive cutting temperatures, and failure of lubrication function.

[0007] Therefore, as an improvement on the traditional MQL technology, scholars have combined cryogenic technology with minimum quantity lubrication technology to form cryogenic minimum quantity lubrication technology (CMQL). CMQL technology is an important green cutting technology. CMQL enhances the cooling and lubrication capabilities by introducing compressed sub-zero airflow or other cryogenic media (such as nitrogen, liquid nitrogen (LN2)), supercritical CO2 (sc(CO2)) together with MQL mist flow. This method combines the advantages of MQL and cryogenic machining, and eliminates the limitations of MQL by significantly improving the heat transfer efficiency in the cutting area. The use of CMQL technology can reduce cutting force and tool wear, effectively inhibit the generation of cutting temperature, and increase tool life. The lubrication effect of CMQL is equivalent to that of traditional cutting fluid, but the amount of lubricant used is only 1% of that of traditional cutting fluid.

[0008] CO2 is one of the most commonly used media in low-temperature machining. Its temperature directly affects the heat exchange efficiency and the surface quality of the workpiece being machined. Therefore, in the low-temperature machining process using CO2 as the heat exchange medium, liquid CO2 is converted into gas under the condition of sudden pressure change and is doped with solid particles. The temperature of liquid CO2 drops during the conversion to gas. Directly inputting the converted gas into the nozzle for low-temperature lubrication cannot achieve reasonable control of the CO2 gas temperature. In addition, the dry ice particles contained in the gas are not only likely to affect the surface machining quality of the workpiece, but also easy to clog the nozzle. It is particularly important to reasonably control the temperature range of CO2 gas and reduce the influence of dry ice particles on the surface quality of the workpiece.

[0009] A multi-loop circulating gas temperature control method in the prior art (patent number: 202010376436.6) discloses a multi-loop circulating gas temperature control method, which sets two independent heating circuits and cooling circuits, and sets the heating circuit and the cooling circuit into multi-section circuits, and the heating circuit and the cooling circuit are provided with outlets and solenoid valves at the detour sections near the outlets; the gases with different needs are heated or cooled respectively through the heating circuit and the cooling circuit, and the gas temperature in each detour section is monitored according to the temperature sensors set in each detour section, and the gas temperature is controlled by a heat absorption device or a heating device, and finally discharged at the set temperature detour section. This invention sets the heating circuit and the cooling circuit into multi-section circuits, so that the gas can be heated or cooled in a smaller space, and different temperatures of different detour sections can be controlled. In addition, the heat absorbed by the cooling circuit can provide a certain heat source for the heating circuit, reducing energy consumption.

[0010] In addition, a dry ice particle processor and a method for processing dry ice particles (patent number: 201510560465.7) discloses a dry ice particle processor and a method for processing dry ice particles, which utilizes the method of vertically arranging pipes, reducing pipe diameters, and setting screens to break dry ice particles multiple times. This invention solves the problem that dry ice particles have large particle diameters and great destructive power, and cannot be used to clean instruments or equipment with high precision requirements, and improves the current situation in which particle cleaning in the dry ice cleaning industry is completely blank.

[0011] However, the above solutions are not for the CO2 gas temperature control system during the low-temperature processing. They cannot reasonably control the CO2 gas temperature before entering the nozzle, nor can they effectively process the dry ice particles, and cannot be fully adapted to the CMQL low-temperature processing system. Summary of the invention

[0012] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a CO2 gas temperature control and dry ice particle processing coupling system to achieve the coupling of gas temperature control and dry ice particle processing, which can control the CO2 gas temperature while effectively processing the dry ice particles.

[0013] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0014] A CO2 gas temperature control and dry ice particle processing coupling system, comprising:

[0015] Gas temperature control unit: The gas temperature control unit includes a working cavity, which includes a plurality of air chambers. Two adjacent air chambers can be connected or disconnected. One side of the working cavity is connected to a first storage tank, which provides heat exchange medium to the working cavity. Each air chamber is respectively connected to a second storage tank to temporarily store the heat exchange medium after heat exchange. The first storage tank is connected to the second storage tank;

[0016] The dry ice particle processing unit includes a gas pipeline arranged in each gas chamber. Each gas pipeline is bent in the corresponding gas chamber. The gas pipelines of two adjacent gas chambers are connected. The gas pipeline is used for the passage of low-temperature CO2. A dry ice crushing component is arranged in the gas pipeline.

[0017] A CO2 gas temperature control and dry ice particle processing coupling system as described above, wherein the dry ice crushing element comprises a rotating grille disposed in the gas pipeline, the rotating grille being supported in the gas pipeline by a connecting rod, the rotating grille comprising a rotating shaft, one end of the rotating shaft being connected to a rotating power source, and the other end of the rotating shaft being connected to a plurality of blades;

[0018] The blade has a set thickness, and a plurality of through holes are arranged on the blade along the thickness direction of the blade.

[0019] In the CO2 gas temperature control and dry ice particle processing coupling system as described above, the volume of the gas chamber in the working chamber gradually increases from one side of the working chamber connected to the first storage tank to the other side of the working chamber, so as to gradually slow down the flow rate of dry ice.

[0020] A CO2 gas temperature control and dry ice particle processing coupling system as described above, wherein the gas pipeline is arranged in an inverted U shape, and the height of the gas pipeline is less than the height of the gas chamber;

[0021] One gas pipeline passes through the side wall of the working chamber to form a CO2 gas inlet, and another gas pipeline passes through the side wall of the working chamber to form a CO2 gas outlet.

[0022] In the CO2 gas temperature control and dry ice particle processing coupling system as described above, a first solenoid valve is arranged between two adjacent gas chambers to control the number of gas chambers opened, and each gas chamber is provided with a second solenoid valve that can be connected to the second storage tank.

[0023] In the CO2 gas temperature control and dry ice particle processing coupling system as described above, a first temperature sensor is arranged in each of the gas chambers, and the first temperature sensor, the first solenoid valve, and the second solenoid valve corresponding to each gas chamber are separately connected to the controller. When the gas temperature in the gas chamber reaches a set value, the controller controls the first solenoid valve to open to increase the number of gas chambers, and / or controls the second solenoid valve to open to discharge the heat exchange medium after heat exchange into the second storage tank.

[0024] In the CO2 gas temperature control and dry ice particle processing coupling system as described above, a third storage tank is connected between the first storage tank and the second storage tank, solenoid valves are respectively provided in the second storage tank and the third storage tank, a regulating valve is provided between the first storage tank and the working chamber, and the regulating valve and the solenoid valve in the second storage tank are respectively connected to the control unit separately;

[0025] A temperature control component is provided in the third storage tank, and the temperature control component includes a second temperature sensor, a temperature controller and a heat exchanger. The heat exchanger, the second temperature sensor and the solenoid valve in the third storage tank are respectively connected to the temperature controller to control the temperature of the heat exchange medium entering the first storage tank.

[0026] In the CO2 gas temperature control and dry ice particle processing coupling system as described above, a pressure control component is provided in the first storage tank, and the pressure control component includes a pressure sensor. The pressure sensor and the solenoid valve in the third storage tank are separately connected to the pressure controller to control the pressure of the heat exchange medium in the first storage tank.

[0027] In a second aspect, the present invention also provides an application of a CO2 gas temperature control and dry ice particle processing coupling system, which is applied to cutting processing, and the outlet of the working chamber sprays dry ice particles toward the surface of the workpiece.

[0028] In a third aspect, the present invention also provides a working method of a CO2 gas temperature control and dry ice particle processing coupling system, including the following contents:

[0029] When dry ice enters the gas pipeline, the gas pipe and the dry ice crushing parts crush the dry ice particles multiple times because the gas pipeline is bent.

[0030] When the temperature of the first air chamber needs to be adjusted, the heat exchange medium in the first storage tank enters the first air chamber;

[0031] When the temperature in the first air chamber is higher than the set value, the two adjacent air chambers can be connected;

[0032] When the heat exchange medium completes the heat exchange, the heat exchange medium can enter the second storage tank for temporary storage, and return to the first storage tank after a set time.

[0033] The beneficial effects of the present invention are as follows:

[0034] 1) The dry ice particle processing unit in the present invention includes a gas pipeline, which is arranged in an air chamber. A heat exchange medium can be introduced into each air chamber. After the heat exchange medium enters the air chamber of the working chamber, it can exchange heat with the CO2 in the gas pipeline. After the temperature of the heat exchange medium rises, it can enter the second storage tank for temporary storage, thereby realizing the regulation of the temperature of the carbon dioxide gas in the working chamber. The gas pipeline is bent and a dry ice crushing piece is arranged in the gas pipeline, thereby realizing the control of the CO2 gas temperature and effectively crushing the dry ice to ensure the processing quality of the workpiece surface, which is fully adapted to the CMQL low-temperature processing system.

[0035] 2) The dry ice crushing element in the present invention includes a rotating grid, which includes a plurality of blades. The rotating shaft can drive the blades to rotate, so that when the dry ice particles flow through the rotating grid, the dry ice particles in the CO2 gas can be effectively crushed, thereby ensuring the fineness of the dry ice particles at the CO2 gas outlet and effectively ensuring the processing quality of the workpiece surface; in addition, the gas pipeline adopts a circuitous design, which can increase the heat exchange efficiency and save space, and can also use its circuitous section to achieve the impact crushing effect on the dry ice particles.

[0036] 3) In the present invention, a first solenoid valve is arranged between two adjacent air chambers, a second solenoid valve is arranged between the air chamber and the second storage tank, and a first temperature sensor is arranged in the air chamber. The controller in each air chamber can control the opening of the first solenoid valve and the second solenoid valve according to the temperature information of the air chamber collected by the first temperature sensor, reasonably control the number of air chambers in use, and when the temperature of the heat exchange medium in the air chamber is too high, pass the heat exchange medium into the second storage tank.

[0037] 4) In the present invention, a pressure control component is provided in the first storage tank, through which the pressure of the heat exchange medium in the first storage tank can be controlled to avoid excessive pressure in the first storage tank; a temperature control component is provided in the third storage tank, which can perform heat exchange on the heat exchange medium when the temperature of the heat exchange medium in the third storage tank is too high to control the temperature of the heat exchange medium entering the first storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0039] Figure 1 It is a schematic diagram of an application environment of a CO2 gas temperature control and dry ice particle processing coupling system according to one or more embodiments of the present invention.

[0040] Figure 2 Schematic diagram of a CO2 gas temperature control and dry ice particle processing coupling system according to one or more embodiments of the present invention.

[0041] Figure 3 It is a schematic diagram of a working chamber opened in a CO2 gas temperature control and dry ice particle processing coupling system according to one or more embodiments of the present invention.

[0042] Figure 4 It is a front view of a working chamber when it is opened in a CO2 gas temperature control and dry ice particle processing coupling system according to one or more embodiments of the present invention.

[0043] Figure 5 It is a schematic diagram of the interior of a portion of a gas pipeline in a CO2 gas temperature control and dry ice particle processing coupling system according to one or more embodiments of the present invention.

[0044] Figure 6 It is an enlarged schematic diagram of a rotating grid in a CO2 gas temperature control and dry ice particle processing coupling system according to one or more embodiments of the present invention.

[0045] Figure 71 is a top view of a rotating grid in a CO2 gas temperature control and dry ice particle processing coupling system according to one or more embodiments of the present invention.

[0046] Figure 8 It is a structural schematic diagram of a solenoid valve in a CO2 gas temperature control and dry ice particle processing coupling system according to one or more embodiments of the present invention.

[0047] Fig. 9 It is a flow chart of a working method of a CO2 gas temperature control and dry ice particle processing coupling system according to one or more embodiments of the present invention.

[0048] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0049] Among them: 1-working chamber; 2-gas pipeline; 3-heat exchange medium inlet; 4-heat exchange medium outlet; 5-first solenoid valve; 6-second solenoid valve; 7-first connecting pipe; 8-second connecting pipe; 9-first storage tank; 10-second storage tank; 11-third connecting pipe; 12-third storage tank; 13-fourth connecting pipe; 14-temperature sensor; 15-rotating grid; 16-connecting rod; 17-CO2 bottle; 18-nozzle; 19-tool; 20-micro-lubrication equipment; 21-workpiece; 22-fixed iron core; 23-spring; 24-coil; 25-moving iron core; 26-valve core; 27-valve seat; 28-third solenoid valve; 29-fourth solenoid valve; 30-temperature control component; 31-pressure control component; 32-regulating valve; 33-blade; 34-ring; 35-through hole. DETAILED DESCRIPTION

[0050] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0051] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;

[0052] As introduced in the background technology, the prior art has the problem that the temperature of CO2 gas is inconvenient to control during low-temperature processing. In order to solve the above technical problem, the present invention proposes a CO2 gas temperature control and dry ice particle processing coupling system.

[0053] Embodiment 1

[0054] In a typical embodiment of the present invention, reference is made to Figure 2 , Figure 3 As shown, a CO2 gas temperature control and dry ice particle processing coupling system comprises:

[0055] Gas temperature control unit: The gas temperature control unit includes a working chamber 1, which includes a plurality of air chambers. Two adjacent air chambers can be connected or disconnected. One side of the working chamber 1 is connected to a first storage tank 9, which provides heat exchange medium to the working chamber 1. Each air chamber is respectively connected to a second storage tank 10 to temporarily store the heat exchange medium after heat exchange. The first storage tank 9 is connected to the second storage tank 10;

[0056] The dry ice particle processing unit includes a gas pipeline 2 arranged in each gas chamber. Each gas pipeline 2 is bent in the corresponding gas chamber. The gas pipelines 2 of two adjacent gas chambers are connected. The gas pipeline is used for the passage of low-temperature CO2. A dry ice crushing component is arranged in the gas pipeline 2.

[0057] refer to Figure 2 As shown, the gas temperature control unit includes a working chamber 1, a first storage tank 9, a second storage tank 10 and a third storage tank 12. The working chamber 1 is connected to the first storage tank 9 and the second storage tank 10 respectively. The third storage tank 12 is arranged between the first storage tank 9 and the second storage tank 10. The second storage tank 10 is communicated with each air chamber in the working chamber 1 respectively. The outer surface of the working chamber 1 is wrapped with a heat insulation layer, and the material of the heat insulation layer is any one of aerogel and mineral wool.

[0058] It is easy to understand that the first storage tank 9 stores a heat exchange medium, the heat exchange medium is oxygen or nitrogen, and the first storage tank is connected to the working chamber 1 through the air inlet pipe;

[0059] refer to Figure 3 As shown, the interior of the working chamber 1 is divided into several groups of air chambers, and the gas pipeline 2 is placed in each air chamber. Each gas pipeline 2 is connected after passing through the side wall of the air chamber. The gas pipeline 2 passes through one side wall of the working chamber 1 to form a CO2 gas inlet 3. The gas pipeline 2 in the last air chamber passes through one side wall of the working chamber 1 to form a CO2 gas outlet 4, and the gas pipeline 2 located inside each group of air chambers is inverted U-shape.

[0060] The connection between the gas pipeline 2 and the inner wall of each gas chamber is sealed with a sealing ring, the diameter of the gas pipeline is set between 30-50 mm, and the interval between each circuitous section of the gas pipeline 2 is set at 5-10 cm. The gas pipeline 2 and the connecting pipe are made of stainless steel, which has the advantages of impact resistance, no deformation, good sealing, long life, etc., and can meet the thermal conductivity requirements. The inner wall of the gas pipeline 2 is coated with polytetrafluoroethylene (PTFE) to prevent the gas pipeline from being blocked by the adhesion of dry ice particles.

[0061] refer to Figure 4 As shown, a first solenoid valve 5 is provided between two adjacent groups of air chambers, a second solenoid valve 6 is installed at the inner top of the air chamber, several groups of second solenoid valves 6 are connected to the first connecting pipe 7, the other end of the first connecting pipe 7 is connected to the second connecting pipe 8, the other end of the second connecting pipe 8 is connected to the second storage tank 10, the end of the second storage tank 10 away from the second connecting pipe 8 is connected to the third storage tank 12 through the third connecting pipe 11, and the other end of the third storage tank 12 is connected to the first storage tank 9 through the fourth connecting pipe 13.

[0062] refer to Figure 5 , Figure 6 As shown, a rotating grille 15 is installed at the longer side of each gas pipeline 2, and the rotating grille 15 is fixed inside the gas pipeline 2 through a connecting rod 16. Both ends of the connecting rod 16 are connected to the gas pipeline 2 through a threaded structure, and are sealed with a cone sealing screw during installation. The sealing screw is a fine-threaded cone screw, and sealant is applied to the thread during sealing;

[0063] Specifically, the rotating grid 15 includes a rotating shaft, one end of which is connected to a rotating power source such as a micro motor, the micro motor is located in a collar 34, the collar 34 is connected to the connecting rod 16, and the other end of the rotating shaft is connected to the plurality of blades 33 respectively; the speed of the rotating shaft can be adjusted according to the size and quantity of the dry ice particles to achieve effective crushing of the dry ice particles, and the micro motor is connected to the control unit;

[0064] refer to Figure 7 As shown, each blade 33 is provided with a plurality of through holes 35, the cross section of the through holes 35 is circular, and the through holes 35 are arranged along the thickness direction of the blade 33. The arrangement of the through holes 35 effectively reduces the influence on the gas pressure in the gas pipeline 2. Since the gas pipeline 2 is arranged in an inverted U-shape, the dry ice particles impact the end surface of the inner wall of the gas pipeline and the blades of the rotating grid 14 during the process of passing through the gas pipeline 2, thereby achieving multiple crushing of the dry ice particles.

[0065] refer to Figure 4As shown, a pressure control component 31 is provided in the first storage tank 9, and the pressure control component 31 includes a pressure sensor. The pressure sensor and the fourth solenoid valve 29 are separately connected to the pressure controller. The pressure controller is an existing pressure controller, and the pressure controller is used to control the pressure of the heat exchange medium in the first storage tank 9, and the pressure is maintained at 0.3-0.5MPa.

[0066] The first storage tank 9 stores heat exchange medium, which is oxygen or nitrogen. The first storage tank 9 is connected to the working chamber 1 through an air intake pipe. The air intake pipe is provided with a regulating valve 32. The regulating valve 32 is used to transport the heat exchange medium to the working chamber 1 to heat or cool the CO2 gas. The regulating range of the regulating valve 32 is 0-0.2MPa.

[0067] It is understandable that a third solenoid valve 28 is provided in the second storage tank 10 to control the on and off of the low-temperature medium.

[0068] In addition, a temperature control component 30 and a fourth solenoid valve 29 are provided in the third storage tank 12. The temperature control component includes a second temperature sensor, a temperature controller and a heat exchanger. The temperature controller is an existing temperature controller. The temperature adjustment range of the temperature controller is 0°C to -60°C. The second temperature sensor obtains the temperature information in the third storage tank 12 and sends it to the temperature controller. The temperature controller controls the opening or closing of the heat exchanger and the fourth solenoid valve 29 according to the temperature of the heat exchange medium in the third storage tank 12. The heat exchanger is an existing commonly used heat exchanger. The heat exchanger is arranged on the outside of the third storage tank 12. When the temperature of the heat exchange medium in the third storage tank 12 is too high, the heat exchanger is opened for heat exchange to reduce the temperature of the heat exchange medium. When the temperature in the third storage tank 12 is reduced to the set temperature, the temperature controller controls the opening of the fourth solenoid valve 29. In this way, the temperature of the heat exchange medium is adjusted according to the actual situation and the heat exchange medium is controlled to flow to the first storage tank 9.

[0069] In addition, a first temperature sensor 14 is installed in each gas chamber, and the first temperature sensor 14 is connected to the controller. The first temperature sensor 14 is specifically installed on the gas pipeline 2, and is used to obtain the gas temperature information in each gas chamber and send it to the corresponding controller. The controller is respectively connected to the first solenoid valve 5 and the second solenoid valve 6 at each gas chamber, and the controller is a PLC controller or other types of controllers.

[0070] It should be noted that the regulating valve 32 and the third solenoid valve 28 are respectively connected to the control unit, and the control unit is respectively connected to the pressure control component, the controller and the temperature control component to control the operation and opening of the pressure control component, the controller and the temperature control component. The control unit is a PLC controller or other types of controllers to control the regulating valve 32 and the third solenoid valve 28.

[0071] It is easy to understand that the first solenoid valve, the second solenoid valve and the inner wall of the working chamber, and the third solenoid valve, the fourth solenoid valve and the inner wall of the corresponding storage tank are all connected by threads, and are sealed with a conical sealing screw during installation. The sealing screw is a fine-threaded conical screw. When sealing, sealant is applied to the thread, and a sealing gasket is installed;

[0072] refer to Figure 8 As shown, the structural principles of each solenoid valve are the same. Each solenoid valve includes a valve seat 27 and a valve core 26. The valve seat supports a coil 24. A moving iron core 25 is arranged in the coil 24. The moving iron core 25 is connected to the fixed iron core 22 through a spring 23. The moving iron core 25 is connected to the valve core 26. When the solenoid valve is energized, the valve core 26 moves relative to the valve seat 27, so that the flow channel of the heat exchange medium is opened, and the heat exchange medium can flow at this time.

[0073] The system provided in this embodiment has a dry ice particle processing unit including a gas pipeline 2, and the gas pipeline 2 is arranged in an air chamber. A heat exchange medium can be introduced into each air chamber, so that after the heat exchange medium enters the air chamber of the working cavity, it can exchange heat with the dry ice in the gas pipeline. After the temperature of the heat exchange medium increases, it can enter the second storage tank for temporary storage, thereby realizing the regulation of the temperature of the carbon dioxide gas in the working cavity. The gas pipeline is provided with a bend, and a dry ice crushing piece is provided in the gas pipeline, thereby realizing the control of the CO2 gas temperature and effectively crushing the dry ice to ensure the processing quality of the workpiece surface, which is fully suitable for the CMQL low-temperature processing system.

[0074] Embodiment 2

[0075] This embodiment provides an application of a CO2 gas temperature control and dry ice particle processing coupling system for cutting processing, referring to Figure 1 As shown, the CO2 gas outlet in the working chamber is connected to the nozzle 18, the nozzle 18 sprays dry ice particles and lubricating oil toward the surface of the workpiece 21, the CO2 gas inlet is connected to the CO2 bottle 17, the workpiece surface is processed by the tool 19, and the nozzle 18 is also connected to the micro-lubrication device 20 to supply lubricating oil to the nozzle, so that according to the temperature requirement of the CO2 gas provided to the nozzle, the control unit controls the opening or closing of the regulating valve and the third solenoid valve, and each controller controls the on-off of the first solenoid valve and the second solenoid valve, the pressure control component controls the fourth solenoid valve, and the temperature control component controls the fourth solenoid valve.

[0076] Embodiment 3

[0077] This embodiment provides a working method of a CO2 gas temperature control and dry ice particle processing coupling system. Fig. 9 As shown, including the following:

[0078] When dry ice enters the gas pipeline, the gas pipe and the dry ice crushing parts crush the dry ice particles multiple times because the gas pipeline is bent.

[0079] When the target gas needs to be temperature-regulated, the control unit can control the heat exchange medium to enter the working chamber 1 by opening and closing the regulating valve 32, and can also regulate the flow rate of the heat exchange medium. When the heat exchange medium enters the leftmost air chamber in the working chamber 1, the first temperature sensor 14 monitors the gas temperature in each air chamber, and the controller can control the number of air chambers opened by controlling the opening or closing of the first solenoid valve 5.

[0080] After the heat exchange medium completes heat exchange through the working chamber 1, it enters the second storage tank 10 through the first connecting pipe 7 and the second connecting pipe 8. The second storage tank 10 temporarily stores the heat exchange medium after heat exchange, and then enters the third storage tank 12 through the third connecting pipe 11.

[0081] The third storage tank 12 is provided with a temperature control component 30, which controls the opening or closing of the fourth solenoid valve according to the temperature in the third storage tank 12. After the temperature of the heat exchange medium in the third storage tank 12 is reduced to the set temperature, it is returned to the first storage tank 9, so as to realize the recycling of the heat exchange medium, thereby saving resources;

[0082] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A CO2 gas temperature control and dry ice particle processing coupling system, characterized in that: include: Gas temperature control unit: The gas temperature control unit includes a working cavity, which includes a plurality of air chambers. Two adjacent air chambers can be connected or disconnected. One side of the working cavity is connected to a first storage tank, which provides heat exchange medium to the working cavity. Each air chamber is respectively connected to a second storage tank to temporarily store the heat exchange medium after heat exchange. The first storage tank is connected to the second storage tank; The dry ice particle processing unit includes a gas pipeline arranged in each gas chamber. Each gas pipeline is bent in the corresponding gas chamber. The gas pipelines of two adjacent gas chambers are connected. The gas pipeline is used for the passage of low-temperature CO2. A dry ice crushing component is arranged in the gas pipeline.

2. A CO2 gas temperature control and dry ice particle processing coupling system according to claim 1, characterized in that: The dry ice crushing element comprises a rotating grille arranged in the gas pipeline, the rotating grille is supported in the gas pipeline by a connecting rod, the rotating grille comprises a rotating shaft, one end of the rotating shaft is connected to a rotating power source, and the other end of the rotating shaft is connected to a plurality of blades; The blade has a set thickness, and a plurality of through holes are arranged on the blade along the thickness direction of the blade.

3. A CO2 gas temperature control and dry ice particle processing coupling system according to claim 1, characterized in that: The volume of the air chamber in the working chamber gradually increases from one side of the working chamber communicating with the first storage tank to the other side of the working chamber.

4. A CO2 gas temperature control and dry ice particle processing coupling system according to claim 1, characterized in that: The gas pipeline is arranged in an inverted U shape, and the height of the gas pipeline is smaller than the height of the gas chamber; One gas pipeline passes through the side wall of the working chamber to form a CO2 gas inlet, and another gas pipeline passes through the side wall of the working chamber to form a CO2 gas outlet.

5. A CO2 gas temperature control and dry ice particle processing coupling system according to claim 1, characterized in that: A first solenoid valve is arranged between two adjacent air chambers to control the opening quantity of the air chambers, and each air chamber is provided with a second solenoid valve which can be communicated with the second storage tank.

6. A CO2 gas temperature control and dry ice particle processing coupling system according to claim 5, characterized in that: A first temperature sensor is arranged in each of the air chambers, and the first temperature sensor, the first solenoid valve and the second solenoid valve corresponding to each air chamber are separately connected to the controller. When the gas temperature in the air chamber reaches a set value, the controller controls the first solenoid valve to open to increase the number of air chambers, and / or controls the second solenoid valve to open to discharge the heat exchange medium after heat exchange into the second storage tank.

7. A CO2 gas temperature control and dry ice particle processing coupling system according to claim 1, characterized in that: A third storage tank is connected between the first storage tank and the second storage tank, solenoid valves are respectively provided in the second storage tank and the third storage tank, a regulating valve is provided between the first storage tank and the working chamber, and the regulating valve and the solenoid valve in the second storage tank are respectively connected to the control unit separately; A temperature control component is provided in the third storage tank, and the temperature control component includes a second temperature sensor, a temperature controller and a heat exchanger. The heat exchanger, the second temperature sensor and the solenoid valve in the third storage tank are respectively connected to the temperature controller to control the temperature of the heat exchange medium entering the first storage tank.

8. A CO2 gas temperature control and dry ice particle processing coupling system according to claim 7, characterized in that: The first storage tank is provided with a pressure control component, which includes a pressure sensor. The pressure sensor and the solenoid valve in the third storage tank are separately connected to the pressure controller to control the pressure of the heat exchange medium in the first storage tank.

9. Application of a CO2 gas temperature control and dry ice particle processing coupling system according to any one of claims 1-8, characterized in that: Applied to cutting processing, the outlet of the working chamber sprays dry ice particles toward the surface of the workpiece.

10. A method for operating a CO2 gas temperature control and dry ice particle processing coupling system according to any one of claims 1 to 8, characterized in that: It includes the following: When dry ice enters the gas pipeline, the gas pipe and the dry ice crushing parts crush the dry ice particles multiple times because the gas pipeline is bent. When the temperature of the first air chamber needs to be adjusted, the heat exchange medium in the first storage tank enters the first air chamber; When the temperature in the first air chamber is higher than the set value, the two adjacent air chambers can be connected; When the heat exchange medium completes the heat exchange, the heat exchange medium can enter the second storage tank for temporary storage, and return to the first storage tank after a set time.

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