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

Abstract

The invention 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 beneficial effects that the overall size of the oil temperature machine is miniaturized, more energy is saved in operation, 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, the maintenance of the oil temperature machine is simpler, the operation cost is low, and the labor cost is relatively low.

Description

Technical Field

[0001] The invention relates to the technical field of oil temperature machines, in particular to an oil temperature machine for a semi-solid new material die-casting mold. Background Art

[0002] With the rapid development of the die-casting industry, semi-solid new material die-casting technology, as an advanced molding process, has the advantages of 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 been widely recognized and applied in the market. However, this technology has high requirements for the control accuracy of mold temperature during the production process. The existing domestic temperature control equipment has problems such as unstable temperature, low heat transfer efficiency, insufficient safety performance, and high energy consumption, which restricts the further development of semi-solid new material die-casting technology. Therefore, it is of great significance to develop oil temperature controllers for semi-solid new material die-casting molds. Summary of the invention

[0003] The object of the present invention is to provide an oil temperature controller for semi-solid new material die-casting molds to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an oil temperature controller for a semi-solid new material die-casting mold, comprising a high-position expansion tank, wherein the high-position expansion tank is respectively provided with interfaces A, B, C, D, E, F, G, H and I around the high-position expansion tank, wherein the interfaces F, G and H are respectively provided with pipelines connected thereto, wherein the interface F is connected to a nitrogen inlet pipeline, wherein the interface G is connected to an interface C' opened at the top of a gas-liquid separator through a pipeline, wherein interfaces A' and B' are respectively opened on both sides of the gas-liquid separator, wherein the interface A' is connected to a heat medium return port through a connecting pipeline, wherein the interface B' is connected to a Interface A” is connected, an interface B” is provided at the other end of the electric heater, and the interface B” is connected to the heat medium outlet through a pipeline. A die-casting mold connected to the heat medium return port and the heat medium outlet is provided, and a heat exchanger is also connected to the pipeline between the heat medium outlet and the interface B”, one end of the heat exchanger is respectively provided with a cooling water return port, a cooling water inlet and a pneumatic three-way regulating valve connected thereto, the other end of the pneumatic three-way regulating valve is provided with a compressed air inlet connected thereto, the interface I is provided with a second bellows stop valve connected thereto, one end of the high-position expansion tank is provided with a connecting pipe connected thereto and forming a loop, and a magnetic flap level gauge is provided on the connecting pipe.

[0005] Further optimized, the interface A is provided with a first safety valve connected thereto, the interface B is provided with a second safety valve connected thereto, the interface C is provided with a manual fluid filling port connected thereto, the interface D is provided with a first pressure gauge connected thereto, and the interface E is provided with a second pressure gauge connected thereto.

[0006] For further optimization, a first one-way valve, a first solenoid valve and a plurality of fire extinguishing nozzles connected thereto are provided between the interface F and the nitrogen inlet pipeline.

[0007] Further optimized, the interface H is connected to the connecting pipeline between the gas-liquid separator and the electric heater through a connecting pipeline, and a first bellows stop valve is provided on it, and one end of the electric heater is provided with a third temperature sensor connected thereto.

[0008] Further optimized, a pressure switch is provided on the connecting air pipe between the pneumatic three-way regulating valve and the compressed air inlet, a connected air pipe is provided between the compressed air inlet pipeline and the heat medium outlet pipeline, and a second solenoid valve and a fourth one-way valve are provided on the air pipe in sequence.

[0009] Further optimized, a pressure transmitter, a second one-way valve, a first temperature sensor, a temperature controller, a fifth pressure gauge and a first flow meter are sequentially provided on the pipeline connecting the heat medium outlet and the electric heater.

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

[0011] For further optimization, a third one-way valve is provided on the connecting pipeline between the cooling water return port and the heat exchanger.

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

[0013] For further optimization, a third safety valve is also provided at the upper end of the interface B" opened at the other end of the electric heater.

[0014] Beneficial Effects

[0015] The oil temperature machine for semi-solid new material die-casting molds provided by the present invention has an overall miniaturized size and is more energy-efficient in operation. The oil temperature machine has high reliability through the addition of a variety of valves. Due to its several groups of miniaturized settings, its maintenance is simpler, and its operating cost is lower, and the labor cost is also relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic plan view of the overall structure of the present invention. DETAILED DESCRIPTION

[0017] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0018] Example

[0019] like Figure 1 As shown, an oil temperature machine for a semi-solid new material die-casting mold includes a high-level expansion tank 1, and interfaces A, B, C, D, E, F, G, H and I are respectively arranged around the high-level expansion tank 1. Interfaces F, G and H are respectively provided with pipelines connected thereto. Interface F is connected to a nitrogen inlet pipeline 10, and interface G is connected to an interface C' opened at the top of a gas-liquid separator 12 through a pipeline. Interfaces A' and B' are respectively opened on both sides of the gas-liquid separator 12. Interface A' is connected to a heat medium return port 38 through a connecting pipeline, and interface B' is connected to an interface A" opened at one end of an electric heater 14 through a connecting pipeline. The electric heater 14 is also provided with a plurality of connecting pipes. An interface B" is provided at one end, and the interface B" is connected to the heat medium outlet 24 through 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". A cooling water return port 22, a cooling water inlet 23 and a pneumatic three-way regulating valve 21 are respectively provided at one end of the heat exchanger 20, and a compressed air inlet 25 is connected to the other end of the pneumatic three-way regulating valve 21. The interface I is provided with a second bellows stop valve 40 connected to the interface. A connecting pipe connected to form a loop is provided at one end of the high-level expansion tank 1, and a magnetic flap liquid 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 one-way valve 8 , a first solenoid valve 9 and a plurality of fire extinguishing nozzles 11 connected to the interface F and the nitrogen inlet pipeline 10 are provided.

[0022] The interface H is connected to the connecting pipeline between the gas-liquid separator 12 and the electric heater 14 through a connecting pipeline, and a first bellows stop valve 19 is provided on it. One end of the electric heater 14 is provided 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, and a connecting air pipe is provided between the compressed air inlet 25 pipeline and the heat medium outlet 24 pipeline, and a second solenoid valve 27 and a fourth one-way valve 28 are provided on the air pipe in sequence.

[0024] The pipeline connecting the heat medium outlet 24 and the electric heater 14 is provided with a pressure transmitter 18, a second one-way valve 32, a first temperature sensor 30, a temperature controller 31, a fifth pressure gauge 29 and a first flow meter 33 in sequence, and the connecting pipeline between the heat medium return port 38 and the gas-liquid separator 12 is provided with a third pressure gauge 34, a second flow meter 36 and a second temperature sensor 35 in sequence.

[0025] A third one-way valve 41 is provided on the connecting pipeline 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 provided on the pipeline connecting the gas-liquid separator 12 and the electric heater 14; a third safety valve 17 is also provided on the upper end of the interface B" opened at the other end of the electric heater 14.

[0027] Operation process and equipment composition structure:

[0028] The whole system consists of expansion tank (including inert gas sealing system), heater body, cooling heat exchanger, magnetic centrifugal pump, circulation pipe fittings, instrument system, fire extinguishing system, PLC control cabinet, etc.

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

[0030] Click the button to start the equipment, the circulation pump will start running, the liquid level will be monitored by the magnetic flap level gauge, and the manual exhaust valve will be opened to exhaust the air in the circulation system; after a period of cold operation, the liquid level in the expansion tank will be at a safe level (higher than the low alarm point) and will no longer drop, the temperature will be raised to boil the oil, and the air and moisture in the system will be exhausted.

[0031] Oil boiling process: the first stage is set to 80℃. When the pressure is stable, the temperature is raised in sequence according to the temperature difference of 10℃. The pressure is observed after the temperature at each temperature point is constant. The next temperature point can be continued when the pressure is stable. The second stage is to stop the heating action after reaching 120℃, exhaust the gas for 1 to 2 minutes, and then proceed to the next temperature rise. The third stage is nitrogen filling and sealing. When the temperature is close to the flash point of the thermal oil (usually 180℃), the pressure is observed. When the pressure is stable, the nitrogen filling and exhausting solenoid valve is opened, and nitrogen is filled into the expansion tank to replace the air at the same time. After the replacement time is reached, the nitrogen exhausting solenoid valve is closed and the nitrogen pressure of 0.5 bar is pre-charged.

[0032] Continuous heating: When the temperature required by the mold is reached (generally 280℃~300℃), the temperature of the heat transfer oil is generally 300℃~310℃. The nitrogen sealing pressure in the expansion tank continues to rise due to the thermal expansion of the heat transfer oil. The preset nitrogen exhaust pressure is 0.8bar. When the nitrogen sealing pressure reaches the preset value, the nitrogen exhaust solenoid valve is opened to release the pressure, so that the nitrogen sealing pressure in the expansion tank is kept below 0.8bar; when the temperature stabilizes, close the manual exhaust valve.

[0033] Cooling process: Set the cooling temperature, and the three-way valve inside the equipment switches to the cooling circuit by proportional adjustment. The high-temperature oil is cooled by the cooling water in the heat exchanger tubes in the cooling heat exchanger to prevent the components from being subjected to cold and hot stress fatigue shock due to excessive cooling, thereby preventing internal leakage.

[0034] Air blowing and oil return device: When the die-casting machine is cooled and stopped, 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] Anti-leakage detection: Flow meters are designed in the system's oil outlet pipe and return pipe. When the monitored flow value is lower than the set value, the equipment will issue an audible and visual alarm and stop running.

[0036] Fire extinguishing device: There are 4 smoke detection devices in the middle of the system. When the smoke concentration is detected to be excessive, the 4 inert gas injection devices on the top of the equipment will be turned on to extinguish the fire. At the same time, the equipment will send out an audible and visual alarm and disconnect the main power supply of the equipment.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the invention content within the protection scope of the present invention.

Claims

1. An oil temperature controller for semi-solid new material die-casting mold, characterized in that: The invention comprises a high-position expansion tank (1), wherein the high-position expansion tank (1) is respectively provided with interfaces A, B, C, D, E, F, G, H and I around the high-position expansion tank (1), wherein the interfaces F, G and H are respectively provided with pipelines connected thereto, wherein the interface F is connected to a nitrogen inlet pipeline (10), wherein the interface G is connected to an interface C' opened at the top of a gas-liquid separator (12) through a pipeline, wherein interfaces A' and B' are respectively opened on both sides of the gas-liquid separator (12), wherein the interface A' is connected to a heat medium return port (38) through a connecting pipeline, wherein the interface B' is connected to an interface A" opened at one end of an electric heater (14) through a connecting pipeline, wherein the other end of the electric heater (14) is provided with an interface B" and wherein the interface B" is connected to the heat medium return port (38) through a connecting pipeline, wherein the interface A" is connected to the heat medium return port (38) through a connecting pipeline, ... 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 respectively 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 stop valve (40) connected thereto. One end of the high-position expansion tank (1) is provided with a connecting pipe connected thereto and forming a loop, and a magnetic flap liquid level gauge (39) is provided on the connecting pipe.

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

3. The oil temperature controller for semi-solid new material die-casting mold according to claim 1, characterized in that: A first one-way valve (8), a first solenoid valve (9) and a plurality of fire extinguishing nozzles (11) connected to the interface F and the nitrogen inlet pipeline (10) are provided between the interface F and the nitrogen inlet pipeline (10).

4. The oil temperature controller for semi-solid new material die-casting mold according to claim 1, characterized in that: The interface H is connected to the connecting pipeline between the gas-liquid separator (12) and the electric heater (14) through a connecting pipeline, and a first bellows stop valve (19) is provided on it. 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 mold 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) pipeline and the heat medium outlet (24) pipeline, and a second solenoid valve (27) and a fourth one-way valve (28) are provided on the air pipe in sequence.

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

7. The oil temperature controller for semi-solid new material die-casting mold according to claim 1 is characterized in that: A third pressure gauge (34), a second flow meter (36) and a second temperature sensor (35) are sequentially provided 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 mold according to claim 1, characterized in that: A third one-way valve (41) is provided on the connecting pipeline between the cooling water return port (22) and the heat exchanger (20).

9. The oil temperature controller for semi-solid new material die-casting mold according to claim 1, characterized in that: A centrifugal pump (13) and a fourth pressure gauge (15) are respectively provided 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 mold 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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