Die casting machine water circulation system

Abstract

This utility model relates to a water circulation system for a die-casting machine, comprising: a shell and a water tank, a low-pressure water assembly, a high-pressure water assembly, a circulating cooling filter assembly, and a makeup water assembly disposed within the shell; the shell is provided with a low-pressure return water inlet, a low-pressure supply water inlet, a high-pressure return water inlet, a high-pressure supply water inlet, a heat exchange medium inlet, a heat exchange medium outlet, and a makeup water inlet; the low-pressure water assembly includes a low-pressure return water pipeline, a low-pressure pump, a low-pressure inlet water pipeline, and a low-pressure outlet water pipeline; the high-pressure water assembly includes a high-pressure return water pipeline, a high-pressure pump, a high-pressure inlet water pipeline, and a high-pressure outlet water pipeline; the circulating cooling filter assembly includes a circulating pump, a bag filter, and a heat exchanger; and the makeup water assembly includes a makeup water pipe and a dosing pipe. This die-casting machine water circulation system has high cooling efficiency, features both low-pressure and high-pressure cooling, real-time online monitoring of pressure and flow, high water temperature control accuracy, and improved operating efficiency. Furthermore, its ingenious structural design allows for automatic adjustment via a human-machine interface as needed.

Description

Technical Field

[0001] This utility model relates to the field of water cooling technology for die casting machines, and in particular to a water circulation system for die casting machines. Background Technology

[0002] In hot pressing processes such as high-pressure, low-pressure, gravity casting, and semi-solid casting, reasonable and stable mold temperature control is a crucial foundation for casting quality and stable production. Simultaneously, optimizing the production process and improving production efficiency and product qualification rate are of paramount importance. Uncontrolled mold temperature during production, whether excessively high or low, will adversely affect casting quality, mold lifespan, production cycle time, process stability, and maintenance costs. Water cooling is a common cooling method. By incorporating cooling water channels within the die-casting mold, circulating cooling water is channeled into the forming distribution panel or core, effectively reducing the surface temperature of the cavity.

[0003] Currently, the cooling water circulation system of die-casting machines has a single function and cannot meet various needs. For example, the cooling efficiency is low, and the single output pipeline design cannot distinguish between low-pressure cooling and high-pressure cooling, resulting in insufficient water temperature control accuracy. Another example is the complex maintenance of filters. The use of fixed filters requires frequent machine shutdowns for cleaning, which affects production efficiency. Utility Model Content

[0004] Therefore, the purpose of this utility model is to overcome the shortcomings of the prior art and provide a water circulation system for a die casting machine.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A water circulation system for a die-casting machine, comprising:

[0007] The housing and the water tank, low-pressure water assembly, high-pressure water assembly, circulating cooling filter assembly and makeup water assembly disposed within the housing;

[0008] The outer casing is provided with a low-pressure return water inlet, a low-pressure supply water inlet, a high-pressure return water inlet, a high-pressure supply water inlet, a heat exchange medium inlet, a heat exchange medium outlet, and a makeup water inlet;

[0009] The low-pressure water assembly includes a low-pressure return water pipeline, a low-pressure pump, a low-pressure inlet water pipeline, and a low-pressure outlet water pipeline. The low-pressure return water inlet is connected to the water tank through the low-pressure return water pipeline. The inlet of the low-pressure pump is connected to the water tank through the low-pressure inlet water pipeline. The outlet of the low-pressure pump is connected to the low-pressure supply water inlet through the low-pressure outlet water pipeline. A low-pressure water flow meter and a first pressure sensor are also installed on the low-pressure outlet water pipeline. A temperature sensor is installed on the low-pressure return water pipeline.

[0010] The high-pressure water assembly includes a high-pressure return water pipeline, a high-pressure pump, a high-pressure inlet water pipeline, and a high-pressure outlet water pipeline. The high-pressure return water inlet is connected to the water tank through the high-pressure return water pipeline. The inlet of the high-pressure pump is connected to the water tank through the high-pressure inlet water pipeline. The outlet of the high-pressure pump is connected to the high-pressure water inlet through the high-pressure outlet water pipeline. A high-pressure water flow meter and a second pressure sensor are also installed on the high-pressure outlet water pipeline.

[0011] The circulating cooling filtration assembly includes a circulating pump, a bag filter, and a heat exchanger. The inlet of the circulating pump is connected to the water tank via a first pipe, and the outlet of the circulating pump is connected to the inlet of the bag filter via a second pipe. The outlet of the bag filter is connected to the circulating water inlet of the heat exchanger via a third pipe, and the circulating water outlet of the heat exchanger is connected to the water tank via a fourth pipe. The heat exchange medium inlet and outlet of the heat exchanger are respectively connected to the heat exchange medium inlet and outlet via pipes. The second and third pipes are also connected by a fifth pipe. A first valve is installed on the portion of the second pipe between the inlet of the bag filter and the fifth pipe, a second valve is installed on the fifth pipe, and a third valve is installed on the portion of the third pipe between the outlet of the bag filter and the fifth pipe.

[0012] The water supply assembly includes a water supply pipe and a dosing pipe. One end of the water supply pipe is connected to the water supply inlet, and the other end is connected to the water tank. One end of the dosing pipe is connected to the water supply pipe, and the other end is equipped with a dosing device.

[0013] In one embodiment, a pressure-reducing pipeline is also provided on the low-pressure water outlet pipeline, the pressure-reducing pipeline is connected to the water tank, and a pressure-reducing valve is provided on the pressure-reducing pipeline.

[0014] In one embodiment, the high-pressure pump body is also connected to a pressure regulating pipeline, which is connected to the water tank.

[0015] As one implementation method, flexible joints are provided on both the low-pressure water inlet pipe and the low-pressure water outlet pipe.

[0016] As one implementation method, both the high-pressure water inlet pipe and the high-pressure water outlet pipe are equipped with flexible joints.

[0017] In one implementation, both the first and second pipelines are equipped with flexible joints.

[0018] In one embodiment, a temperature regulating valve is provided on the pipe between the heat exchange medium inlet and the heat exchange medium outlet of the heat exchanger.

[0019] As one implementation, the outer casing is provided with an access door.

[0020] As one implementation, the housing is also provided with an electronic control component.

[0021] As can be seen from the above settings, the water circulation system of the die-casting machine in this embodiment has high cooling efficiency, low-pressure cooling and high-pressure cooling, high water temperature control accuracy, and uses a bag filter for filtration. The maintenance is complicated, but the efficiency is greatly improved. In addition, the structure is cleverly designed, and the opening of the valve can be adjusted as needed to control simultaneous cooling and filtration or separate cooling.

[0022] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the water circulation system of the die-casting machine in an embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the structure of the water circulation system of the die-casting machine when the outer shell is removed in an embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the structure of the water tank and low-pressure water assembly in the embodiments of this application;

[0026] Figure 4 This is a schematic diagram of the structure of the water tank and high-pressure water assembly in the embodiments of this application;

[0027] Figure 5 This is a schematic diagram of the structure of the water tank and the circulating cooling filter assembly in the embodiments of this application;

[0028] Figure 6 This is a schematic diagram of the structure of the water tank and water supply assembly in the embodiments of this application;

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Outer casing; 11. Low-pressure return water inlet; 12. Low-pressure supply water inlet; 13. High-pressure return water inlet; 14. High-pressure supply water inlet; 15. Heat exchange medium inlet; 16. Heat exchange medium outlet; 17. Inspection door; 18. Electrical control components; 2. Water tank; 3. Low-pressure water assembly; 31. Low-pressure return water pipeline; 32. Low-pressure pump; 33. Low-pressure inlet water pipeline; 34. Low-pressure outlet water pipeline; 341. Low-pressure water flow meter; 342. Pressure reducing pipeline; 343. Pressure reducing valve; 4. High-pressure water assembly; 41. High-pressure return water pipeline; 42. High-pressure pump; 421. 43. Pressure regulating pipeline; 44. High-pressure water inlet pipeline; 45. High-pressure water outlet pipeline; 46. High-pressure water flow meter; 57. Circulating cooling filter assembly; 58. Circulating pump; 59. Bag filter; 50. Heat exchanger; 51. Temperature regulating valve; 52. First pipeline; 53. Second pipeline; 54. First valve; 55. Third pipeline; 56. Third valve; 57. Fourth pipeline; 58. Fifth pipeline; 59. Second valve; 60. Makeup water assembly; 61. Makeup water pipe; 62. Dosing pipe; 63. Dosing device; 7. Flexible joint. Detailed Implementation

[0031] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this utility model.

[0033] Please see Figures 1 to 6 This embodiment provides a water circulation system for a die-casting machine, which includes: a housing 1 and a water tank 2, a low-pressure water assembly 3, a high-pressure water assembly 4 and a circulating cooling filter assembly 5 disposed within the housing 1.

[0034] The outer casing 1 is rectangular and is used to protect the components installed inside. The outer casing 1 is provided with a low-pressure return water inlet 11, a low-pressure supply water inlet 12, a high-pressure return water inlet 13, a high-pressure supply water inlet 14, a heat exchange medium inlet 15, and a heat exchange medium outlet 16.

[0035] The low-pressure water assembly 3 includes a low-pressure return water pipe 31, a low-pressure pump 32, a low-pressure inlet water pipe 33, and a low-pressure outlet water pipe 34. The low-pressure return water port 11 is connected to the water tank 2 through the low-pressure return water pipe 31. The inlet of the low-pressure pump 32 is connected to the water tank 2 through the low-pressure inlet water pipe 33. The outlet of the low-pressure pump 32 is connected to the low-pressure supply water port 12 through the low-pressure outlet water pipe 34. A low-pressure water flow meter 341 and a first pressure sensor (not shown) are also installed on the low-pressure outlet water pipe 34. A temperature sensor (not shown) is installed on the low-pressure return water pipe.

[0036] The high-pressure water assembly 4 includes a high-pressure return water pipe 41, a high-pressure pump 42, a high-pressure inlet water pipe 43, and a high-pressure outlet water pipe 44. The high-pressure return water port 13 is connected to the water tank 2 through the high-pressure return water pipe 41. The inlet of the high-pressure pump 42 is connected to the water tank 2 through the high-pressure inlet water pipe 43. The outlet of the high-pressure pump 42 is connected to the high-pressure water inlet 14 through the high-pressure outlet water pipe 44. A high-pressure water flow meter 441 and a second pressure sensor (not shown) are also installed on the high-pressure outlet water pipe 44.

[0037] The circulating cooling filtration assembly 5 includes a circulating pump 51, a bag filter 52, and a heat exchanger 53. The inlet of the circulating pump 51 is connected to the water tank 2 via a first pipe 54, the outlet of the circulating pump 51 is connected to the inlet of the bag filter 52 via a second pipe 55, the outlet of the bag filter 52 is connected to the circulating water inlet of the heat exchanger 53 via a third pipe 56, and the circulating water outlet of the heat exchanger 53 is connected to the water tank 2 via a fourth pipe 57. The heat exchange medium of the heat exchanger 53... The inlet and outlet of the heat exchange medium are respectively connected to the heat exchange medium inlet 15 and heat exchange medium outlet 16 via pipes; the second pipe 55 and the third pipe 56 are also connected by a fifth pipe 58. A first valve 551 is provided on the portion of the second pipe 55 between the inlet of the bag filter and the fifth pipe 58. A second valve 581 is provided on the fifth pipe 58. A third valve 561 is provided on the portion of the third pipe 56 between the outlet of the bag filter 52 and the fifth pipe 58.

[0038] When used in conjunction with a die-casting machine, the die-casting machine can be connected to the low-pressure return port 11, the low-pressure supply port 12, the high-pressure return port 13, and the high-pressure supply port 14.

[0039] On one hand, the low-pressure pump can pressurize the circulating cooling water to a set pressure value and supply it to the die-casting machine. The circulating cooling water enters the die-casting machine to cool the mold, and after cooling, it flows back to the water tank 2 through the low-pressure return port 11. The temperature, flow rate, and pressure of the circulating cooling water return can be monitored in real time by the temperature sensor, low-pressure flow meter, and first pressure sensor on the low-pressure return water pipeline. The pressure regulating valve on the low-pressure outlet water pipeline can be adjusted to regulate the thermal balance of the mold. The low-pressure water flow meter 341 can detect the water output of the low-pressure pump 32 to control the cooling effect.

[0040] On the other hand, temperature control can also be achieved through localized high-pressure circulating cooling water spot cooling. The high-pressure pump 42 can pump the circulating cooling water in the water tank 2 out at a higher pressure. The circulating cooling water enters the die-casting machine for spot cooling and then flows back to the water tank 2 through the high-pressure return port 13 after cooling. The high-pressure water flow meter 441 can detect the water output of the high-pressure pump 42 to control the cooling effect.

[0041] The circulating cooling filter assembly 5 described in this embodiment has an ingenious structural design, enabling it to circulate, filter, and cool the circulating cooling water in the water tank 2. For example, when it is necessary to simultaneously filter and cool the water in the water tank 2, the first valve 551 and the third valve 561 are set to the open state, and the second valve 581 is set to the closed state. When the circulating pump 51 is started, it can draw in the circulating cooling water from the water tank 2, and the water flows back to the water tank 2 after passing through the first pipeline 54, the circulating pump 51, the second pipeline 55, the bag filter 52, the third pipeline 56, the heat exchanger 53, and the fourth pipeline 57 in sequence. The circulating cooling water is filtered when passing through the bag filter 52, and the water can be cooled by the heat exchange medium when passing through the heat exchanger 53. The circulating cooling water is used for cooling; for example, when only the water in the water tank 2 needs to be cooled, the first valve 551 and the third valve 561 are set to the closed state, and the second valve 581 is set to the open state. When the circulating pump 51 is started, it can draw the circulating cooling water in the water tank 2 and pass through the first pipeline 54, the circulating pump 51, a part of the second pipeline 55, the fifth pipeline 58, a part of the third pipeline 56, the heat exchanger 53, and the fourth pipeline 57 in sequence before flowing back to the water tank 2. When passing through the heat exchanger 53, the circulating cooling water can be cooled by the heat exchange medium.

[0042] Among them, the bag filter 52 is a new type of filtration system. The filter bag is supported by a metal mesh basket inside the bag filter 52. Liquid flows in through the inlet, is filtered by the filter bag, and flows out through the outlet. Impurities are trapped in the filter bag, and the system can be reused after the filter bag is replaced, which is very convenient. The heat exchange medium can enter the heat exchanger 53 through the heat exchange medium inlet 15 to cool the circulating cooling water, and then be discharged through the heat exchange medium outlet 16. The heat exchange medium can be water at a lower temperature, or it can be refrigerant output from refrigeration equipment; there are no limitations on this.

[0043] As shown in the above settings, the water circulation system of the die-casting machine in this embodiment has high cooling efficiency, featuring both low-pressure and high-pressure cooling, high water temperature control accuracy, and simple maintenance using a 52-type bag filter, significantly improving efficiency. Furthermore, its ingenious structural design allows for automatic adjustment of simultaneous cooling and filtration or separate cooling at the human-machine interface as needed. During the casting production process, the water circulation system of this embodiment monitors water temperature, flow rate, and pressure online in real time. If the set temperature value is exceeded, the system automatically adjusts the cooling efficiency of the proportional valve to lower the circulating cooling water temperature. Once set, the flow rate is stable, achieving a stable mold temperature, ultimately ensuring stable production and product quality control.

[0044] The die-casting machine using the water circulation system of this embodiment has the following beneficial effects:

[0045] (1) Extend mold life - Uniform heat distribution can extend mold life;

[0046] (2) Eliminate stress cracks. The use of the system can alleviate the local overheating or intermittent water cooling caused by thermal shock due to flame preheating of molds, which often leads to local internal stress.

[0047] (3) Before production begins, preheat the mold quickly and purposefully to shorten the preheating time;

[0048] (4) The mold temperature is constant at the start of production, which reduces the number of defective products;

[0049] (5) The uniform and stable mold temperature during the production process can effectively reduce the amount of mold release agent used.

[0050] (6) The use of the system can maintain thermal stability and improve die-casting technology;

[0051] (7) Reduced heat dissipation can improve the production environment;

[0052] (8) Fully automatic operation with automatic mold temperature control and adjustment reduces instability caused by other external factors;

[0053] (9) The use of the equipment has a significant improvement on common quality problems such as appearance size, surface roughness, and shrinkage cracks;

[0054] (10) The use of equipment with anti-scaling agents and other auxiliary water quality improvement reagents significantly improves the scaling of cooling channels.

[0055] Preferably, the water circulation system of the die-casting machine in this embodiment further includes a water supply component 6 disposed within the outer casing 1. The outer casing has a water supply inlet (shown in the figure). The water supply component 6 includes a water supply pipe 61 and a chemical dosing pipe 62. One end of the water supply pipe 61 is connected to the water supply inlet, and the other end is connected to the water tank 2. One end of the chemical dosing pipe 62 is connected to the water supply pipe 61, and the other end is equipped with a chemical dosing device 63. This configuration allows necessary chemical agents to be added to the water tank 2 via the chemical dosing device 63. By using these chemical agents, the water can meet certain quality requirements, ensuring the system operates at its optimal state, effectively controlling microbial flora, inhibiting scale formation, and preventing corrosion of pipes and equipment, thereby reducing energy consumption and extending the service life of the equipment.

[0056] Preferably, a pressure-reducing pipe 342 is also provided on the low-pressure water outlet pipe 34, the pressure-reducing pipe 342 is connected to the water tank 2, and a pressure-reducing valve 343 is provided on the pressure-reducing pipe 342. By providing the pressure-reducing pipe 342 and the pressure-reducing valve 343, damage to the equipment can be prevented from caused by a sudden excessively high water pressure at the outlet of the low-pressure pump 32.

[0057] Preferably, the pump body of the high-pressure pump 42 is also connected to a pressure regulating pipe 421, which is connected to the water tank 2, thereby allowing the pressure of the high-pressure pump to be adjusted when the high-pressure pump 42 is working.

[0058] Preferably, flexible joints 7 are provided on both the low-pressure inlet pipe 33 and the low-pressure outlet pipe 34, as well as on both the high-pressure inlet pipe 43 and the high-pressure outlet pipe 44, and on both the first pipe 54 and the second pipe 55. Installing flexible joints 7 (flexible rubber joints or expansion joints) on the pump inlet and outlet pipes can compensate for the expansion and contraction of the pipes during pump operation and installation errors, and can also reduce the damage to the pump and other equipment caused by pipe vibration (such as vibration caused by large flow rates of liquid).

[0059] Preferably, a temperature regulating valve 531 is installed on the pipe between the heat exchange medium inlet and the heat exchange medium outlet 16 of the heat exchanger 53. The main function of the temperature regulating valve 531 is to automatically regulate and control the temperature of the heat exchange medium. It automatically adjusts the valve opening by sensing the temperature change of the heat exchange medium, thereby controlling the flow rate of the medium to achieve the set temperature.

[0060] Preferably, the outer casing 1 is provided with an inspection door 17 for user convenience in maintenance.

[0061] Preferably, the housing 1 is further provided with an electrical control component 18. The electrical control component 18 is electrically connected to the electrical components in the low-pressure water assembly 3, the high-pressure water assembly 4, and the circulating cooling filter assembly 5 to control the operation of these electrical components.

[0062] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A water circulation system for a die-casting machine, characterized in that, include: The housing and the water tank, low-pressure water assembly, high-pressure water assembly, circulating cooling filter assembly and makeup water assembly disposed within the housing; The outer casing is provided with a low-pressure return water inlet, a low-pressure supply water inlet, a high-pressure return water inlet, a high-pressure supply water inlet, a heat exchange medium inlet, a heat exchange medium outlet, and a makeup water inlet; The low-pressure water assembly includes a low-pressure return water pipeline, a low-pressure pump, a low-pressure inlet water pipeline, and a low-pressure outlet water pipeline. The low-pressure return water inlet is connected to the water tank through the low-pressure return water pipeline. The inlet of the low-pressure pump is connected to the water tank through the low-pressure inlet water pipeline. The outlet of the low-pressure pump is connected to the low-pressure supply water inlet through the low-pressure outlet water pipeline. A low-pressure water flow meter and a first pressure sensor are also installed on the low-pressure outlet water pipeline. A temperature sensor is installed on the low-pressure return water pipeline. The high-pressure water assembly includes a high-pressure return water pipeline, a high-pressure pump, a high-pressure inlet water pipeline, and a high-pressure outlet water pipeline. The high-pressure return water inlet is connected to the water tank through the high-pressure return water pipeline. The inlet of the high-pressure pump is connected to the water tank through the high-pressure inlet water pipeline. The outlet of the high-pressure pump is connected to the high-pressure water inlet through the high-pressure outlet water pipeline. A high-pressure water flow meter and a second pressure sensor are also installed on the high-pressure outlet water pipeline. The circulating cooling filtration assembly includes a circulating pump, a bag filter, and a heat exchanger. The inlet of the circulating pump is connected to the water tank via a first pipe, and the outlet of the circulating pump is connected to the inlet of the bag filter via a second pipe. The outlet of the bag filter is connected to the circulating water inlet of the heat exchanger via a third pipe, and the circulating water outlet of the heat exchanger is connected to the water tank via a fourth pipe. The heat exchange medium inlet and outlet of the heat exchanger are respectively connected to the heat exchange medium inlet and outlet via pipes. The second and third pipes are also connected by a fifth pipe. A first valve is installed on the portion of the second pipe between the inlet of the bag filter and the fifth pipe, a second valve is installed on the fifth pipe, and a third valve is installed on the portion of the third pipe between the outlet of the bag filter and the fifth pipe. The water supply assembly includes a water supply pipe and a dosing pipe. One end of the water supply pipe is connected to the water supply inlet, and the other end is connected to the water tank. One end of the dosing pipe is connected to the water supply pipe, and the other end is equipped with a dosing device.

2. The water circulation system for a die-casting machine according to claim 1, characterized in that: The low-pressure water outlet pipeline is also equipped with a pressure-reducing pipeline, which is connected to the water tank, and a pressure-reducing valve is installed on the pressure-reducing pipeline.

3. The water circulation system for a die-casting machine according to claim 1, characterized in that: The high-pressure pump body is also connected to a pressure regulating pipeline, which is connected to the water tank.

4. The water circulation system for a die-casting machine according to claim 1, characterized in that: Both the low-pressure inlet and outlet water pipes are equipped with flexible joints.

5. The water circulation system for a die-casting machine according to claim 1, characterized in that: Both the high-pressure water inlet pipe and the high-pressure water outlet pipe are equipped with flexible joints.

6. The water circulation system for a die-casting machine according to claim 1, characterized in that: Both the first and second pipelines are equipped with flexible joints.

7. The water circulation system for a die-casting machine according to any one of claims 1-6, characterized in that: A temperature regulating valve is installed on the pipe between the heat exchange medium inlet and the heat exchange medium outlet of the heat exchanger.

8. The water circulation system for a die-casting machine according to claim 7, characterized in that: The outer casing is equipped with an inspection door.

9. The water circulation system for a die-casting machine according to claim 8, characterized in that: The outer casing is also equipped with electronic control components.

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