Oil temperature machine for semi-solid new material die-casting die

Abstract

The utility model discloses an oil temperature machine for a semi-solid new material die-casting die. The oil temperature machine is composed of an expansion tank (containing an inert gas sealing system), a heater body, a cooling heat exchanger, a magnetic centrifugal pump, a circulating pipe fitting, an instrument system, a fire extinguishing system, a PLC control cabinet and the like. The oil temperature machine has the advantages that the overall size of the oil temperature machine is miniaturized, operation is more energy-saving, the reliability of the oil temperature machine is high through the additionally-arranged multiple valves, and due to the fact that the multiple valves are arranged in a miniaturized mode, maintenance of the oil temperature machine is simpler, operation cost is low, and labor cost is relatively low.

Description

Technical Field

[0001] This utility model relates to the field of oil temperature controller technology, specifically an oil temperature controller for a semi-solid new material die-casting mold. Background Technology

[0002] With the rapid development of the die casting industry, semi-solid die casting technology, as an advanced forming process, boasts advantages such as high dimensional accuracy, good surface quality, high production efficiency, and low cost. It is one of the main forming methods for aluminum and magnesium alloy parts used in industries such as automobiles, motorcycles, and aerospace, and has gradually gained widespread recognition and application in the market. However, this technology requires high precision in mold temperature control during production. Existing domestic temperature control equipment suffers from problems such as temperature instability, low heat transfer efficiency, insufficient safety performance, and high energy consumption, hindering the further development of semi-solid die casting technology. Therefore, developing an oil temperature controller for semi-solid die casting molds is of great significance. Utility Model Content

[0003] The purpose of this invention is to provide an oil temperature controller for die-casting molds of semi-solid new materials, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an oil temperature controller for a semi-solid new material die-casting mold, comprising a high-level expansion tank. The high-level expansion tank is provided with interfaces A, B, C, D, E, F, G, H, and I around its perimeter. Interfaces F, G, and H are each connected to a pipeline. Interface F is connected to a nitrogen inlet pipeline. Interface G is connected to interface C' at the top of a gas-liquid separator via a pipeline. Interfaces A' and B' are respectively provided on both sides of the gas-liquid separator. Interface A' is connected to a heat medium return port via a connecting pipeline, and interface B' is connected to one end of an electric heater via a connecting pipeline. The electric heater is connected to interface A”, and the other end of the electric heater is provided with interface B”. Interface B” is connected to the heat medium outlet through a pipeline. A die-casting mold is provided between the heat medium return port and the heat medium outlet. A heat exchanger is also connected to the pipeline between the heat medium outlet and interface B”. One end of the heat exchanger is provided with a cooling water return port, a cooling water inlet port and a pneumatic three-way regulating valve. The other end of the pneumatic three-way regulating valve is provided with a compressed air inlet. Interface I is provided with a second bellows shut-off valve. One end of the high-level expansion tank is provided with a connecting pipe that forms a loop, and a magnetic float level gauge is provided on the connecting pipe.

[0005] In a further optimized configuration, interface A is equipped with a first safety valve connected thereto, interface B is equipped with a second safety valve connected thereto, interface C is equipped with a manual replenishment port connected thereto, interface D is equipped with a first pressure gauge connected thereto, and interface E is equipped with a second pressure gauge connected thereto.

[0006] In a further optimized configuration, the interface F is connected to the nitrogen inlet pipeline by a first check valve, a first solenoid valve, and multiple fire extinguishing nozzles.

[0007] In a further optimized configuration, the interface H is connected to the gas-liquid separator and the electric heater via a connecting pipe, and is equipped with a first bellows shut-off valve. A third temperature sensor is connected to one end of the electric heater.

[0008] In a further optimized configuration, a pressure switch is provided on the connecting air pipe between the pneumatic three-way regulating valve and the compressed air inlet, and a connecting air pipe is provided between the compressed air inlet pipe and the heat medium outlet pipe, with a second solenoid valve and a fourth check valve sequentially installed on the air pipe.

[0009] In a further optimized configuration, a pressure transmitter, a second check valve, a first temperature sensor, a thermostat, a fifth pressure gauge, and a first flow meter are sequentially installed on the pipeline connecting the heat medium outlet to the electric heater.

[0010] In a further optimized configuration, a third pressure gauge, a second flow meter, and a second temperature sensor are sequentially installed on the connecting pipeline between the heat medium return port and the gas-liquid separator.

[0011] As a further optimization, a third check valve is provided on the connecting pipe between the cooling water return port and the heat exchanger.

[0012] In a further optimization, a centrifugal pump and a fourth pressure gauge are respectively installed on the pipeline connecting the gas-liquid separator and the electric heater.

[0013] Furthermore, the interface B” at the other end of the electric heater is further optimized by providing a third safety valve.

[0014] Beneficial effects

[0015] The oil temperature controller for semi-solid new material die casting mold provided by this utility model has a smaller overall size and is more energy-efficient. The addition of multiple valves makes the oil temperature controller highly reliable. Due to its several miniaturized settings, it is easier to maintain and has lower operating and labor costs. Attached Figure Description

[0016] Figure 1 This is a schematic plan view of the overall structure of this utility model. Detailed Implementation

[0017] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0018] Example

[0019] like Figure 1 As shown, an oil temperature controller for a semi-solid new material die-casting mold includes a high-level expansion tank 1. The high-level expansion tank 1 has interfaces A, B, C, D, E, F, G, H, and I on its perimeter. Interfaces F, G, and H are connected to pipelines. Interface F is connected to a nitrogen inlet pipeline 10. Interface G is connected to interface C' at the top of a gas-liquid separator 12 via a pipeline. Interfaces A' and B' are located on both sides of the gas-liquid separator 12. Interface A' is connected to a heat medium return port 38 via a connecting pipeline, and interface B' is connected to interface A'" at one end of an electric heater 14 via a connecting pipeline. The electric heater 14... One end is provided with an interface B”, which is connected to the heat medium outlet 24 via a pipeline. A die-casting mold 37 is connected between the heat medium return port 38 and the heat medium outlet 24. A heat exchanger 20 is also connected to the pipeline between the heat medium outlet 24 and the interface B”. One end of the heat exchanger 20 is provided with a cooling water return port 22, a cooling water inlet port 23 and a pneumatic three-way regulating valve 21 connected thereto. The other end of the pneumatic three-way regulating valve 21 is provided with a compressed air inlet 25 connected thereto. The interface I is provided with a second bellows shut-off valve 40 connected thereto. One end of the high-level expansion tank 1 is provided with a connecting pipe that forms a loop, and a magnetic float level gauge 39 is provided on the connecting pipe.

[0020] In this embodiment, interface A is provided with a first safety valve 3 connected thereto, interface B is provided with a second safety valve 4 connected thereto, interface C is provided with a manual fluid replenishment port 5 connected thereto, interface D is provided with a first pressure gauge 6 connected thereto, and interface E is provided with a second pressure gauge 7 connected thereto.

[0021] A first check valve 8, a first solenoid valve 9, and multiple fire extinguishing nozzles 11 are connected between interface F and nitrogen inlet pipe 10.

[0022] Interface H is connected to the gas-liquid separator 12 and the electric heater 14 via a connecting pipe, and is equipped with a first bellows shut-off valve 19. One end of the electric heater 14 is equipped with a third temperature sensor 16 connected thereto.

[0023] A pressure switch 26 is provided on the connecting air pipe between the pneumatic three-way regulating valve 21 and the compressed air inlet 25. A connecting air pipe is provided between the compressed air inlet 25 pipe and the heat medium outlet 24 pipe, and a second solenoid valve 27 and a fourth check valve 28 are provided on the air pipe in sequence.

[0024] A pressure transmitter 18, a second check valve 32, a first temperature sensor 30, a temperature controller 31, a fifth pressure gauge 29, and a first flow meter 33 are sequentially installed on the pipeline connecting the heat medium outlet 24 and the electric heater 14. A third pressure gauge 34, a second flow meter 36, and a second temperature sensor 35 are sequentially installed on the pipeline connecting the heat medium return port 38 and the gas-liquid separator 12.

[0025] A third check valve 41 is provided on the connecting pipe between the cooling water return port 22 and the heat exchanger 20.

[0026] A centrifugal pump 13 and a fourth pressure gauge 15 are respectively installed on the pipeline connecting the gas-liquid separator 12 and the electric heater 14; a third safety valve 17 is also installed at the upper end of the interface B” opened at the other end of the electric heater 14.

[0027] Operation process and equipment composition:

[0028] The entire system consists of an expansion tank (including an inert gas sealing system), a heater body, a cooling heat exchanger, a magnetic centrifugal pump, circulation pipes, an instrumentation system, a fire extinguishing system, and a PLC control cabinet.

[0029] After connecting the equipment pipelines, circuits, and air lines, manually inject heat transfer oil into the high-level expansion tank and then open the relevant valves and power supply.

[0030] Click the button to start the equipment. The circulation pump will run, monitor the liquid level through the magnetic float level gauge, and open the manual exhaust valve to remove air from the circulation system. After running in cold mode for a period of time, the liquid level in the expansion tank will be brought to a safe level (above the low alarm point) and will no longer drop. Then, the oil will be heated and boiled to remove air and moisture from the system.

[0031] Oil heating process: The first stage is set to 80℃. After the pressure stabilizes, the temperature is increased in increments of 10℃. After the temperature stabilizes at each point, the pressure is observed. Only after the pressure stabilizes can the next temperature point be reached. The second stage is to stop heating after reaching 120℃, vent the gas for 1-2 minutes, and then proceed to the next temperature increase. The third stage is nitrogen purging and sealing. When the temperature approaches the flash point of the heat transfer oil (usually 180℃), the pressure is observed. After the pressure stabilizes, the nitrogen purging and venting solenoid valve is opened, and nitrogen is filled into the expansion tank to replace the air. After the replacement time is reached, the nitrogen venting solenoid valve is closed, and the nitrogen pressure is pre-charged to 0.5 bar.

[0032] Continuous heating: Reach the temperature required by the mold (generally 280℃~300℃). At this time, the temperature of the heat transfer oil is generally 300℃~310℃. Due to the heat expansion of the heat transfer oil, the nitrogen sealing pressure in the expansion tank continues to rise. The preset nitrogen venting pressure is 0.8 bar. When the nitrogen sealing pressure reaches the preset value, open the nitrogen venting solenoid valve to release pressure and keep the nitrogen sealing pressure in the expansion tank below 0.8 bar. After the temperature stabilizes, close the manual venting valve.

[0033] Cooling process: Set the cooling temperature, switch the three-way valve inside the equipment to the cooling circuit, and cool the high-temperature oil by the cooling water in the heat exchange tube of the cooling heat exchanger at a controlled rate to prevent the components from being subjected to thermal stress fatigue impact due to excessive cooling, thereby preventing internal leakage.

[0034] Air blowing and oil return device: After the die casting machine cools down and stops, the heat transfer oil in the mold can be blown back to the expansion tank of the oil temperature machine through one-button air blowing and oil return.

[0035] Leakage detection: Flow meters are designed in the system's oil outlet and return pipes. When the monitored flow rate is lower than the set value, the equipment will issue an audible and visual alarm and stop operating.

[0036] Fire extinguishing system: The system is equipped with four smoke detection devices in the middle. When the smoke concentration exceeds the standard, the four inert gas injection devices on the top of the equipment will be activated to extinguish the fire. At the same time, the equipment will issue an audible and visual alarm and disconnect the main power supply of the equipment.

[0037] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An oil temperature controller for a semi-solid new material die-casting mold, characterized in that: The system includes a high-level expansion tank (1), which is provided with interfaces A, B, C, D, E, F, G, H and I around its perimeter. Interfaces F, G and H are respectively provided with pipes connected to them. Interface F is connected to the nitrogen inlet pipe (10), and interface G is connected to interface C' at the top of the gas-liquid separator (12) via a pipe. Interfaces A' and B' are respectively provided on both sides of the gas-liquid separator (12). Interface A' is connected to the heat medium return port (38) via a connecting pipe, and interface B' is connected to interface A” at one end of the electric heater (14) via a connecting pipe. Interface B” is provided at the other end of the electric heater (14). Interface B” is connected to the other end of the electric heater (14) via a pipe. The pipeline is connected to the heat medium outlet (24). A die-casting mold (37) is provided between the heat medium return port (38) and the heat medium outlet (24). A heat exchanger (20) is also connected to the pipeline between the heat medium outlet (24) and the interface B”. One end of the heat exchanger (20) is provided with a cooling water return port (22), a cooling water inlet (23) and a pneumatic three-way regulating valve (21) connected thereto. The other end of the pneumatic three-way regulating valve (21) is provided with a compressed air inlet (25) connected thereto. The interface I is provided with a second bellows shut-off valve (40) connected thereto. One end of the high-level expansion tank (1) is provided with a connecting pipe that is connected and forms a loop, and a magnetic float level gauge (39) is provided on the connecting pipe.

2. The oil temperature controller for semi-solid new material die-casting molds according to claim 1, characterized in that: Interface A is equipped with a first safety valve (3) connected thereto, interface B is equipped with a second safety valve (4) connected thereto, interface C is equipped with a manual replenishment port (5) connected thereto, interface D is equipped with a first pressure gauge (6) connected thereto, and interface E is equipped with a second pressure gauge (7) connected thereto.

3. The oil temperature controller for semi-solid new material die-casting molds according to claim 1, characterized in that: The interface F is connected to the nitrogen inlet pipe (10) by a first one-way valve (8), a first solenoid valve (9) and multiple fire extinguishing nozzles (11).

4. The oil temperature controller for semi-solid new material die-casting molds according to claim 1, characterized in that: The interface H is connected to the gas-liquid separator (12) and the electric heater (14) through a connecting pipe, and is provided with a first bellows shut-off valve (19). One end of the electric heater (14) is provided with a third temperature sensor (16) connected thereto.

5. The oil temperature controller for semi-solid new material die-casting molds according to claim 1, characterized in that: A pressure switch (26) is provided on the connecting air pipe between the pneumatic three-way regulating valve (21) and the compressed air inlet (25). A connecting air pipe is provided between the compressed air inlet (25) pipe and the heat medium outlet (24) pipe, and a second solenoid valve (27) and a fourth check valve (28) are provided on the air pipe in sequence.

6. The oil temperature controller for semi-solid new material die-casting molds according to claim 1, characterized in that: The pipeline connecting the heat medium outlet (24) and the electric heater (14) is provided with a pressure transmitter (18), a second check valve (32), a first temperature sensor (30), a temperature controller (31), a fifth pressure gauge (29), and a first flow meter (33) in sequence.

7. The oil temperature controller for semi-solid new material die-casting molds according to claim 1, characterized in that: A third pressure gauge (34), a second flow meter (36), and a second temperature sensor (35) are sequentially installed on the connecting pipeline between the heat medium return port (38) and the gas-liquid separator (12).

8. The oil temperature controller for semi-solid new material die-casting molds according to claim 1, characterized in that: A third check valve (41) is provided on the connecting pipe between the cooling water return port (22) and the heat exchanger (20).

9. The oil temperature controller for semi-solid new material die-casting molds according to claim 1, characterized in that: A centrifugal pump (13) and a fourth pressure gauge (15) are respectively installed on the pipeline connecting the gas-liquid separator (12) and the electric heater (14).

10. The oil temperature controller for semi-solid new material die-casting molds according to claim 1, characterized in that: A third safety valve (17) is also provided at the upper end of the interface B” opened at the other end of the electric heater (14).

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