Water type die temperature system special for die casting

Abstract

The utility model discloses a special water type die temperature system for die casting, which comprises a water circulation loop which is communicated with a client side and can control on-off, and the water circulation loop is provided with a heater, a heat exchanger and a gas collection cylinder. Wherein the heat exchanger is internally communicated with a cooling water inlet pipe and a cooling water outlet pipe which are used for cooling a water circulation loop, the gas collecting cylinder is communicated with a pressurizing water supplementing pipe and a pressure relief pipe, and the pressure relief pipe is connected with the cooling water outlet pipe in an on-off mode. According to the utility model, the gas collection cylinder is additionally arranged on the water circulation loop and is connected with the pressurizing water replenishing pipe and the pressure relief pipe, circulating water in the system is pressurized through the pressurizing water replenishing pipe so as to ensure that the water temperature is high enough, and the pressure relief pipe is directly communicated with the cooling water outlet pipe of the heat exchanger; therefore, water in the system is decompressed to the cooling water outlet pipe and then discharged out of the system along with the cooling water outlet pipe, rapid decompression and exhaust of the system are achieved, and the safety of the system is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to temperature control technical field especially relates to a water type mould temperature system special for die casting. BACKGROUND

[0002] The water mould temperature system for die casting is mainly used for controlling the temperature of the mould to ensure that the mould temperature remains stable during the die casting process. The system uses water as the heat transfer medium and adjusts the mould temperature through heating and cooling to improve the temperature forming quality of the product, prolong the service life of the mould, and reduce the cooling time in the production cycle. The main working principle of the general water type mould temperature system is as follows: the water type mould temperature system heats the water to the set temperature through the heater and sends the hot water into the cooling channel inside the mould through the circulating pump. When the temperature of the mould exceeds the set value, the cooling device starts to work to reduce the water temperature and is sent into the mould interior again through the circulating pump.

[0003] Compared with the oil type mould temperature system, the water type mould temperature system is more energy-saving and environmentally friendly, has lower cost, simple emission, and is safer when leakage occurs during the die casting process because the boiling point of water is lower than that of oil, which can reduce pollution to the environment. However, the pressure control in the current water type mould temperature system is all carried out by using the expansion valve to stabilize the pressure, the volume change of the expansion valve is used to make the pressure in the system constant, and the pressure valve is used to make the system pressure adjustable. However, the water needs to be pressurized and heated to become superheated water for circulation and heating under normal atmospheric pressure, which may easily cause overpressure. To ensure the safety of the mould temperature system, rapid pressure relief is needed. However, the existing technology (such as the publication number CN213593559U) mostly adopts the above-mentioned pressure relief method, which is slow in pressure relief and air exhaust. In addition to the above problems, the water type mould temperature system in the prior art also has defects such as slow temperature rising and falling response and poor heat exchange efficiency. SUMMARY

[0004] The present application proposes a water type mould temperature system special for die casting, which aims to solve the defects of slow pressure relief, slow air exhaust, and slow temperature rising and falling response rate in the prior art.

[0005] The technical scheme adopted by the utility model is as follows: a water type mould temperature system special for die casting, which comprises a controllable water circulation loop in communication with a client, a heater, a heat exchanger, and a gas collecting cylinder arranged on the water circulation loop; wherein the heat exchanger is connected in communication with a cooling water inlet pipe and a cooling water outlet pipe for cooling the water circulation loop, the gas collecting cylinder is connected in communication with a pressurized water supply pipe and a pressure relief pipe, and the pressure relief pipe is connected in communication with the cooling water outlet pipe.

[0006] Further, a first check valve, a water supply electromagnetic valve, a ball valve, a low pressure protection switch, a filter, and a pressurizing pump are arranged on the pressurized water supply pipe.

[0007] Further, the pressurized water supply pipe is further provided with a second check valve in parallel with the pressurizing pump.

[0008] Further, the water circulation loop is provided with a circulating pump and a drain pipe, and a filter and a ball valve are arranged at the water outlet end of the client, and a ball valve is arranged at the water inlet end of the client, and the water inlet end and the water outlet end of the client are further connected with a bypass pipe.

[0009] Further, the pressure relief pipe is sequentially provided with a filter, a pressure relief electromagnetic valve and a check valve from the gas collecting cylinder to the cooling water outlet pipe.

[0010] Further, the cooling water inlet pipe is provided with a filter, a ball valve and a cooling electromagnetic valve, and the cooling water outlet pipe is provided with a check valve and a ball valve.

[0011] Further, the top end of the gas collecting cylinder is communicated with a gas discharge pipe, and the gas discharge pipe is provided with a filter and a gas discharge electromagnetic valve.

[0012] Further, the top end of the gas collecting cylinder is further provided with a pressure detection device, a liquid level detection device, a protection switch and a safety valve.

[0013] Compared with the prior art, the utility model discloses a water type mould temperature system special for die casting, by adding a gas collecting cylinder on the water circulation loop, connecting the pressurized water supply pipe and the pressure relief pipe through the gas collecting cylinder, pressurizing the circulating water in the system through the pressurized water supply pipe to ensure that the water temperature is high enough (reaches 100 DEG C), and directly connecting the cooling water outlet pipe of the heat exchanger through the pressure relief pipe, so that the water in the system is discharged to the cooling water outlet pipe and then discharged from the system along with the cooling water outlet pipe, realizing the rapid pressure relief and exhaust of the system, ensuring the safety of the system, and the high-temperature hot water can be directly supplemented through the pressurized water supply pipe in the utility model, so that the temperature rising response rate is improved, and the temperature rising time is shortened. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor.

[0015] Figure 1 It is the connection structure schematic diagram of the temperature control system in the utility model.

[0016] The main reference signs in the application are as follows:

[0017] 1, heater; 2, heat exchanger; 3, gas collecting cylinder; 4, cooling water inlet pipe; 5, cooling water outlet pipe; 6, pressurized water supply pipe; 7, pressure relief pipe; 8, first check valve; 9, water supply solenoid valve; 10, low pressure protection switch; 11, pressurizing pump; 12, second check valve; 13, circulating pump; 14, drain pipe; 15, client; 16, filter; 17, ball valve; 18, bypass pipe; 19, pressure relief solenoid valve; 20, check valve; 21, cooling solenoid valve; 22, exhaust pipe; 23, exhaust solenoid valve; 24, pressure detection device; 25, liquid level detection device; 26, protection switch; 27, safety valve; 28, temperature detection device; 29, high pressure protection switch. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the following will further describe the present application in conjunction with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0019] In the following description, reference is made to the accompanying drawings, which show several embodiments of the present application. It should be understood that other embodiments can also be used and that mechanical, structural, electrical and operational changes can be made without departing from the spirit and scope of the present disclosure. The following detailed description should not be considered limiting, and the scope of the embodiments of the present application is only limited by the claims of the published patent. The terms used herein are only used to describe specific embodiments and are not intended to limit the present application. Spatially related terms, such as "upper", "lower", "left", "right", "below", "under", "bottom", "above", "top", etc., can be used in the text to facilitate the description of the relationship between one element or feature shown in the figure and another element or feature.

[0020] The present application proposes a water-based mold temperature control system dedicated to die casting, as shown in Figure 1 By optimizing the water efficient circulation loop design, precise control of mold temperature is achieved, while ensuring system operation safety. The system not only has heating and cooling functions, but also improves the stability of mold temperature control through ingenious gas management and pressure regulation mechanism.

[0021] The core of the system is a water circulation loop, which is mainly responsible for sending heated or cooled water into the client 15 mold to achieve temperature regulation of the client 15 mold. The water circulation loop is provided with a circulating pump 13 and a drain pipe 14. A filter 16, a ball valve 17 and a temperature detection device 28 are arranged on the water circulation loop at the water outlet end of the client 15. A ball valve 17, a temperature detection device 28 and a high-voltage protection switch 29 are arranged on the water inlet end of the client 15. The water inlet end and the water outlet end of the client 15 are also connected with a bypass pipe 18. In addition, a heater 1, a heat exchanger 2 and a gas collecting cylinder 3 are arranged on the circulation loop to flexibly switch between heating and cooling according to the needs of the mold. The heater 1 is used to heat and warm the circulating water. A temperature detection device 28 is arranged on the heater 1. The heat exchanger 2 cools the water through cooling water to ensure that the water in the water circulation loop is cooled in time when the temperature is too high.

[0022] The heat exchanger 2 is connected with a cooling water inlet pipe 4 and a cooling water outlet pipe 5 for cooling the water circulation loop. The cooling water inlet pipe 4 is provided with a filter 16, a ball valve 17 and a cooling electromagnetic valve 21. The cooling water outlet pipe 5 is provided with a check valve 20 and a ball valve 17. Cooling water is continuously introduced into the heat exchanger 2 to cool the circulating water.

[0023] The top end of the gas collecting cylinder 3 is connected with an exhaust pipe 22. The exhaust pipe 22 is provided with a filter 16 and an exhaust electromagnetic valve 23. The top end of the gas collecting cylinder 3 is also provided with a pressure detection device 24, a liquid level detection device 25, a protection switch 26 and a safety valve 27. The gas collecting cylinder 3 is used to collect gas in the circulating water to prevent the accumulation of gas in the loop and affect the water flow. The exhaust pipe 22 is arranged at the top of the gas collecting cylinder 3. The pressure detection and liquid level detection device 25 monitors the system state in real time. In combination with the safety valve 27 and the protection switch 26, the system can automatically respond in abnormal conditions to prevent equipment damage. On the other hand, the gas collecting cylinder 3 is connected with a pressurized water supply pipe 6 and a pressure relief pipe 7. The pressure relief pipe 7 is connected with the cooling water outlet pipe 5. The pressurized water supply pipe 6 is provided with a first check valve 8, a water supply electromagnetic valve 9, a ball valve 17, a low-pressure protection switch 10, a filter 16 and a pressurized pump 11. The pressurized water supply pipe 6 is also provided with a second check valve 12. The second check valve 12 is connected with the pressurized pump 11 in parallel. When the water volume is insufficient or the pressure is low, the pressurized pump 11 and / or the water supply electromagnetic valve 9 automatically supplies water to the system to restore normal pressure. The pressure relief pipe 7 is provided with a filter 16, a pressure relief electromagnetic valve 19 and a check valve 20 in sequence from the gas collecting cylinder to the cooling water outlet pipe 5. When the pressure is too high, the pressure relief electromagnetic valve 19 controls the pressure relief to the cooling water outlet pipe 5 and is discharged together to ensure that the system operates within a safe pressure range. The cooling water inlet and outlet system is provided with a pipe with a ball valve 17 and a check valve 20 to ensure the safety of the cooling process.

[0024] Based on the above structure, the principle of the utility model is:

[0025] When the exhaust, start circulating pump 13, the external water by water inlet into the pressurized water pipe 6, the external water can be preheated high temperature water, flow through the pipeline filter 16, ball valve 17, water supply solenoid valve 9, first check valve 8, second check valve 12 and flow into the gas cylinder 3, and by circulating pump 13 output to the client 15, again through the client 15 flow back to the heat exchanger 2, heater 1, gas cylinder 3 and by circulating pump 13 continue to output a cycle, water in the process of pipeline circulation, exhaust solenoid valve 23 is set below 80 DEG C (temperature can be set according to the working condition) automatically open exhaust, so that the water in the process of pipeline circulation, the air in the pipeline is discharged by the gas cylinder 3, and by the filter 16, exhaust solenoid valve 23 pipeline of gas cylinder 3.

[0026] When the air in the pipeline is discharged, the temperature is raised, and the system temperature is set, when the set system temperature is greater than the outlet temperature, the heater 1 starts to heat at this time, the water in the pipeline will heat expansion in the process of temperature rise, the pressure in the pipeline will not exceed 1 standard atmosphere, when the actual temperature exceeds 80 DEG C (temperature can be set according to the working condition), the exhaust solenoid valve 23 is automatically closed, when in the process of temperature rise, such as heater 1 dry burning phenomenon, that is, the heater 1 pipe cylinder internal pipeline water is not full, the heater 1 pipe cylinder outer wall temperature will be too high at this time, the temperature sensor detects the current overtemperature temperature is too high, which will disconnect the total power supply to play the role of equipment protection.

[0027] When the temperature is raised, the water is heated to 100 DEG C under normal atmospheric pressure, which will vaporize, in order to heat the water, the water needs to be pressurized, at this time, the pressurized pump 11 starts to work, at this time, the external water enters the pressurized water pipe 6 from the water inlet, flows through the pipeline filter 16, ball valve 17, and is pressurized by the pressurized pump 11, and is forced to supplement the internal pipeline, flows into the gas cylinder 3 through the water supply solenoid valve 9 and the first check valve 8, and is internally circulated by the circulating pump 13, so that the water in the pipeline becomes superheated water. When the heater 1 is heated to the set system temperature, the pressurized pump 11 stops running and does not pressurize the water. When the set temperature is reached, the internal actual situation may appear overpressure phenomenon, at this time, the pressure value detected by the protection switch 26 is too large, the pressure relief solenoid valve 19 is automatically opened, the high pressure water in the gas cylinder 3 flows out through the filter 16, the pressure relief solenoid valve 19 and the check valve 20, so that the internal pipeline is constant at a certain pressure value at the temperature, which greatly improves the safety of the equipment. After pressure relief, the pressure in the pipeline is lower than the pressure value detected by the high pressure relief protection switch 26, at this time, the pressure relief solenoid valve 19 is automatically closed.

[0028] When the system temperature is constant, when heated to the set system temperature, the actual situation can appear the heating amount over-super phenomenon, that is, the outlet temperature value exceeds the set system temperature value, at this time the heater 1 stops heating, and the opening and closing of the cooling electromagnetic valve 21 is adjusted, so that the cooling water enters from the external cooling water inlet, passes through the filter 16, the ball valve 17, the cooling electromagnetic valve 21, flows into the heat exchanger 2 and then flows out, passes through the check valve 20, the ball valve 17, and flows out from the cooling water outlet, the cold water of the cooling water passes through the heat exchanger 2 to replace part of the heat of the hot water in the pipeline, when the set system temperature approaches the current outlet water temperature, the cooling electromagnetic valve 21 is closed. When the set system temperature is lower than the current outlet water temperature, the heater 1 continues to start heating, and the precise temperature control effect is realized by continuously adjusting the working state of the heater 1 and the cooling electromagnetic valve 21 during the constant temperature process.

[0029] When the temperature is lowered, when the set system temperature is lower than the outlet temperature value, at this time the heater 1 stops heating, and the cooling electromagnetic valve 21 is opened, so that the cooling water enters from the external cooling water inlet, passes through the filter 16, the ball valve 17, the cooling electromagnetic valve 21, flows into the heat exchanger 2 and then flows out, passes through the check valve 20, the ball valve 17, and flows out from the cooling water outlet, the cold water of the cooling water passes through the heat exchanger 2 to replace the heat of the hot water in the pipeline, until the set system temperature is equal to the outlet temperature value, at this time the cooling electromagnetic valve 21 is closed, so that the cooling water does not enter the heat exchanger 2 for heat exchange.

[0030] Compared with the prior art, the utility model discloses a water type mould temperature system special for die casting, by adding a gas collecting cylinder 3 on the water circulation loop, connecting the pressurized water supply pipe 6 and the pressure relief pipe 7 through the gas collecting cylinder 3, pressurizing the circulating water in the system through the pressurized water supply pipe 6 to ensure that the water temperature is high enough (reaches 100 DEG C), and the cooling water outlet pipe 5 of the heat exchanger 2 is directly communicated through the pressure relief pipe 7, so that the water in the system is discharged from the cooling water outlet pipe 5 and the system, realizing the rapid pressure relief and exhaust of the system, ensuring the safety of the system, and the high-temperature hot water can be directly supplemented through the pressurized water supply pipe 6 in the utility model, so that the temperature rising response rate is improved and the temperature rising time is shortened. Moreover, the mould temperature system in the utility model also has the characteristics of no pollution, and compared with the oil temperature machine, the subsequent discharge is much simpler, is not dangerous energy, can reduce the pollution to the environment, and meets the concept of green production. The above only describes the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A water type mold temperature system dedicated to die casting, characterized by, The application relates to a controllable water circulation circuit connected with a client, wherein a heater, a heat exchanger and a gas collecting cylinder are arranged on the water circulation circuit; the heat exchanger is connected with a cooling water inlet pipe and a cooling water outlet pipe for cooling the water circulation circuit; the gas collecting cylinder is connected with a pressurized water supplement pipe and a pressure relief pipe; and the pressure relief pipe is connected with the cooling water outlet pipe. The pressurized water supplement pipe is provided with a first check valve, a water supplement electromagnetic valve, a ball valve, a low-pressure protection switch, a filter and a pressurized pump.

2. The water-based mold temperature system of claim 1, wherein The pressurized water supplement pipe is further provided with a second check valve which is connected with the pressurized pump in parallel.

3. The water-based mold temperature system of claim 2, wherein, The water circulation circuit is provided with a circulating pump and a drain pipe; a filter and a ball valve are arranged on the water outlet end of the client; a ball valve is arranged on the water inlet end of the client; and a bypass pipe is further connected with the water inlet end and the water outlet end of the client.

4. The water-based mold temperature system of claim 1, wherein The pressure relief pipe is provided with a filter, a pressure relief electromagnetic valve and a check valve in sequence from the gas collecting cylinder to the cooling water outlet pipe.

5. The water-based mold temperature system of claim 1, wherein The cooling water inlet pipe is provided with a filter, a ball valve and a cooling electromagnetic valve; and the cooling water outlet pipe is provided with a check valve and a ball valve.

6. The water-based mold temperature system of claim 1, wherein, The top end of the gas collecting cylinder is connected with an exhaust pipe which is provided with a filter and an exhaust electromagnetic valve.

7. The water-based mold temperature system of claim 1, wherein The top end of the gas collecting cylinder is further provided with a pressure detection device, a liquid level detection device, a protection switch and a safety valve.

8. The water-based mold temperature system of claim 1, wherein, ​

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