Cooling water system of die-casting workshop

Abstract

The utility model discloses a die-casting workshop cooling water system which comprises a cooling device, a cooling water pool and a die temperature control device, the cooling water pool is connected with the cooling device and the die temperature control device through a water inlet pipe and a water outlet pipe respectively, and the die temperature control device is connected with the cooling device through a water return pipe. A plurality of water pumps are arranged on the water outlet pipe, a siphon assembly is arranged on the water outlet pipe between the water pumps and the cooling water tank, a filter assembly is arranged on the water outlet pipe between the water pumps and the mold temperature control device, and a pressure sensor is arranged on the water outlet pipe between the filter assembly and the mold temperature control device; a first temperature sensor and a second temperature sensor are respectively arranged on the water inlet pipe and the water return pipe. The device is efficient and energy-saving, water pump cavitation is reduced, and the pressure of a cooling pipeline is stabilized; and water quality detection and filtration can be automatically carried out on cooling water, the filtration efficiency is high, the filter can be self-cleaned, and manual decontamination is not needed.

Description

Technical Field

[0001] The utility model relates to the technical field of mold cooling, in particular to a cooling water system for a die-casting workshop. Background Art

[0002] During the metal die-casting process, the cooling water system provides cooling water to the mold temperature controller to cool the mold. The cooling water system is generally composed of a circulation pipeline, a cooling water pump, a water pool, etc. However, the traditional cooling water system has the following problems:

[0003] 1. The water pump is prone to fail to draw water from the underground water pool, causing water pump cavitation, resulting in unstable cooling water pipeline pressure and water pump overload;

[0004] 2. In order to continuously output cooling water and accurately control the water temperature of cooling water, the cooling tower and water pump are turned on at high speed for a long time, resulting in high energy consumption and poor energy saving effect;

[0005] 3. The filtering effect of cooling water is poor, and the filter needs to be cleaned manually regularly, which is a cumbersome and complicated process;

[0006] Therefore, it is necessary to develop a cooling water system for a die-casting workshop that is efficient and energy-saving, reduces water pump cavitation, and stabilizes the pressure of the cooling pipe; the cooling water can be automatically tested and filtered with high filtration efficiency, and the filter can be self-cleaned without manual decontamination. Utility Model Content

[0007] In order to solve the above problems, the technical solutions adopted by the utility model are as follows:

[0008] A cooling water system for a die-casting workshop, comprising a cooling device, a cooling water pool and a mold temperature control device, characterized in that the cooling water pool is connected to the cooling device and the mold temperature control device through a water inlet pipe and a water outlet pipe respectively, the mold temperature control device is connected to the cooling device through a return pipe, a plurality of water pumps are arranged on the water outlet pipe, a siphon assembly is arranged on the water outlet pipe between the water pump and the cooling water pool, a filter assembly is arranged on the water outlet pipe between the water pump and the mold temperature control device, a pressure sensor is arranged on the water outlet pipe between the filter assembly and the mold temperature control device, and a first temperature sensor and a second temperature sensor are arranged on the water inlet pipe and the return pipe respectively;

[0009] The pressure sensor is electrically connected to the plurality of water pumps, and the first temperature sensor and the second temperature sensor are electrically connected to a cooling device.

[0010] Preferably, the mold temperature control device includes multiple mold temperature controllers connected to the die-casting machine, and a third valve is provided at the connection between the multiple mold temperature controllers and the water outlet pipes. The mold temperature controllers are used to accurately and stably control the temperature of cooling water entering the mold.

[0011] Preferably, the cooling device comprises a plurality of cooling towers, and the first temperature sensor and the second temperature sensor are electrically connected to fans of the cooling towers.

[0012] Preferably, the plurality of water pumps are variable frequency water pumps and are connected in parallel with each other.

[0013] Preferably, the siphon assembly comprises a siphon tank.

[0014] Preferably, a lower liquid level sensor is provided in the cooling water pool, and the lower liquid level sensor is electrically connected to the water pump.

[0015] Preferably, the filter assembly includes two or more filters connected in parallel, and a first valve is provided at the water inlet end of the filter.

[0016] Preferably, the filter assembly further comprises a connecting pipe connected in parallel with the plurality of filters, and a second valve is provided on the connecting pipe.

[0017] Preferably, a water quality detection sensor for detecting turbidity of cooling water is provided on the connecting pipe.

[0018] Preferably, a first flow sensor and a second flow sensor are respectively provided at the water inlet and the water outlet of the filter, and the filter is a self-cleaning filter.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The speed of the cooling tower fan and water pump can be automatically controlled according to the outlet water temperature and outlet water pressure to reduce energy consumption and achieve energy saving.

[0021] 2. Through the setting of siphon components and lower liquid level sensors, ensure that the suction end of the water pump effectively absorbs water, reduce water pump cavitation, stabilize the pressure of the cooling water pipeline, and effectively protect the water pump.

[0022] 3. The fully automatic self-cleaning filter can automatically detect and filter the cooling water. The filtration efficiency is high, and the filter can be self-cleaning without manual decontamination. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 for Figure 1 A partial enlarged schematic diagram in the middle;

[0025] Among them: cooling device 1, cooling water pool 2, water pump 3, filter assembly 4, die-casting machine 5, water pump 6, siphon tank 7, water inlet pipe 10, cooling tower 11, water outlet pipe 20, mold temperature controller 31, return pipe 30, pressure sensor 40, filter 41, connecting pipe 42, first temperature sensor 50, second temperature sensor 60, lower liquid level sensor 70, first valve 80, second valve 90, water quality detection sensor 100, first flow sensor 110, second flow sensor 120, third valve 130. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the accompanying drawings. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0027] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon at the same time. The terms "vertical", "horizontal", "left", "right", "up", "down", "front", "rear" and similar expressions used herein are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:

[0030] like Figure 1 , 2As shown, a cooling water system for a die-casting workshop comprises a cooling device 1, a cooling water pool 2 and a mold temperature control device 3, wherein the cooling water pool 2 is connected to the cooling device 1 and the mold temperature control device 3 through an inlet pipe 10 and an outlet pipe 20 respectively, and the mold temperature control device 3 is connected to the cooling device 1 through a return pipe 30, a plurality of water pumps 6 are arranged on the outlet pipe 20, a siphon assembly is arranged on the outlet pipe 20 between the water pump 6 and the cooling water pool, a filter assembly 4 is arranged on the outlet pipe 20 between the water pump 6 and the mold temperature control device 3, a pressure sensor 40 is arranged on the outlet pipe 20 between the filter assembly 4 and the mold temperature control device 3, and a first temperature sensor 50 and a second temperature sensor 60 are arranged on the inlet pipe 10 and the return pipe 30 respectively;

[0031] The pressure sensor 40 is electrically connected to the plurality of water pumps 6 , and the first temperature sensor 50 and the second temperature sensor 60 are electrically connected to the cooling device 1 .

[0032] In this embodiment, the mold temperature control device 3 is used to control the temperature of the mold, the first temperature sensor 50 is used to monitor the temperature of the cooling water in the water inlet pipe 10, and the second temperature sensor 60 is used to detect the temperature of the cooling water in the water return pipe 30; the pressure sensor 40 is used to detect the water pressure of the cooling water in the water outlet pipe 20;

[0033] In this embodiment, the siphon component is set to effectively prevent the water pump 6 from failing to draw water from the underground water pool, reduce cavitation of the water pump 6, and no manual water replenishment is required each time the water pump 6 is turned on, thereby stabilizing the pressure of the cooling water pipeline and protecting the water pump 6.

[0034] In this embodiment, the first temperature sensor 50 can be used to control the operating state of the cooling device 1 according to the temperature of the cooling water entering the cooling device 1 through the return pipe 30. That is, when the temperature of the cooling water after absorbing heat entering the cooling device 1 from the return pipe 30 is low, the cooling device 1 can reduce the cooling efficiency or stop operating to achieve the set water outlet temperature, thereby achieving the purpose of energy saving. By setting the second temperature sensor 60, the temperature of the cooling water entering the cooling water pool 2 can be accurately controlled.

[0035] During the production process, the water pump 6 is turned on for a long time, the water supply pressure is relatively high, the power of the water pump 6 is quite large, and the electricity consumption is also quite high; therefore, through the pressure sensor 40, the speed of the water pump 6 can be controlled according to the start-up rate of the mold temperature control device 3, that is, when the start-up rate of the mold temperature control device 3 is low, the pressure sensor 40 is used to control the water pump 6 to reduce the speed, thereby achieving the effect of reducing energy consumption and saving energy.

[0036] Further, such as Figure 1 , 2As shown, the mold temperature control device 3 includes multiple mold temperature controllers 31 connected to the die-casting machine 5, and a third valve 130 is provided at the connection between the multiple mold temperature controllers 31 and the water outlet pipe 20. The mold temperature controller 31 is used to accurately and stably control the temperature of cooling water entering the mold.

[0037] In this embodiment, the third valve 130 corresponding to the start-up of the die-casting machine is opened, and the third valve 130 corresponding to the shutdown of the die-casting machine is closed, thereby reducing the idling of cooling water in the pipeline.

[0038] In this embodiment, when the operating rate of the mold temperature controller 31 is low, the pressure sensor 40 detects that the cooling water pressure of the water outlet pipe 20 is reduced, thereby controlling the water pump 6 to reduce the rotation speed, thereby achieving the purpose of reducing energy consumption and saving energy.

[0039] Further, such as Figure 1 As shown, the cooling device 1 includes a plurality of cooling towers 11 , and the first temperature sensor 50 and the second temperature sensor 60 are electrically connected to fans of the cooling towers 11 .

[0040] In this embodiment, the plurality of cooling water towers are controlled by the outlet water temperature. By setting a temperature sensor on the inlet and outlet water pipes 20 of the cooling tower 11, when the inlet water temperature is low, the fan of the cooling tower 11 is controlled to reduce the speed or stop running, so as to achieve the set outlet water temperature, thereby achieving the purpose of reducing energy consumption and saving energy.

[0041] Further, such as Figure 1 , 2 As shown, the plurality of water pumps 6 are all variable frequency water pumps and are connected in parallel with each other.

[0042] In this embodiment, a variable frequency water pump can be used to automatically adjust the output load according to the actual water consumption on site to achieve energy-saving control.

[0043] In this embodiment, the operation of one or more water pumps 6 can be controlled according to the start-up rate of the mold temperature control device 3, so as to achieve high efficiency and energy saving while ensuring the circulation of cooling water temperature.

[0044] Further, such as Figure 1 , 2 As shown, the siphon assembly includes a siphon tank 7.

[0045] In this embodiment, during operation, the siphon tank 7 discharges air from the cooling water flowing to the water pump 6, thereby reducing cavitation of the water pump 6 and eliminating the need for manual water replenishment each time the water pump 6 is turned on.

[0046] Further, such as Figure 1 As shown, a lower liquid level sensor 70 is provided in the cooling water pool 2 , and the lower liquid level sensor 70 is electrically connected to the water pump 6 .

[0047] In this embodiment, a liquid level sensor is provided in the cooling water pool 2 to control the start and stop of the water pump 6. When the liquid level in the cooling water pool 2 is lower than the set value, the water pump 6 automatically stops, which can prevent the water pump 6 from being sucked empty, causing air to enter the cooling water pipeline and causing unstable pressure; at the same time, it can effectively protect the water pump 6 from being overloaded and reduce cavitation.

[0048] Further, such as Figure 1 , 2 As shown, the filter assembly 4 includes two or more filters 41 connected in parallel, and a first valve 80 is provided at the water inlet end of the filter 41 .

[0049] In this embodiment, a filter assembly 4 consisting of multiple filters 41 connected in parallel is connected to the water outlet pipe 20. Without stopping the machine, by controlling the on and off of the first valve 80, some of the filters 41 can enter a cleaning state while the rest continue filtering, thereby improving work efficiency.

[0050] Further, such as Figure 1 , 2 As shown, the filter assembly 4 further includes a connecting pipe 42 connected in parallel with the plurality of filters 41 , and a second valve 90 is disposed on the connecting pipe 42 .

[0051] In this embodiment, when the turbidity of the cooling water does not exceed the standard, the second valve 90 is opened and the first valve 80 is closed. The cooling water does not need to be filtered and directly enters the mold temperature control device 3 from the connecting pipe 42; when the turbidity of the cooling water exceeds the standard, the first valve 80 is opened and the second valve 90 is closed. The cooling water needs to be filtered through one or more filters 41 before entering the mold temperature control device 3 to improve the filtering efficiency.

[0052] Further, such as Figure 1 As shown, the connecting pipe 42 is provided with a water quality detection sensor 100 for detecting the turbidity of cooling water.

[0053] In this embodiment, when the water quality detection sensor 100 detects that the turbidity of the cooling water exceeds the standard, the first valve 80 is opened and the second valve 90 is closed, so that the cooling water enters the filter 41 for filtration, thereby realizing automatic detection and filtration of the cooling water.

[0054] Further, such as Figure 1 , 2 As shown, the water inlet end and the water outlet end of the filter 41 are respectively provided with a first flow sensor 110 and a second flow sensor 120 , and the filter 41 is a self-cleaning filter 41 .

[0055] In this embodiment, the filtration efficiency of the filter 41 can be determined by real-time monitoring of the flow difference between the first flow sensor 110 and the second flow sensor 120; when the filtration efficiency is lower than the set value, the self-cleaning filter 41 is controlled to self-clean, and the cooling water can be automatically tested and filtered with high filtration efficiency, and the filter can be self-cleaned without manual decontamination.

[0056] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the scope of protection of the claims of the utility model patent.

Claims

1. A cooling water system for a die casting workshop, comprising a cooling device, a cooling water pool and a mold temperature control device, characterized in that: The cooling water pool is connected to the cooling device and the mold temperature control device through a water inlet pipe and a water outlet pipe respectively, the mold temperature control device is connected to the cooling device through a water return pipe, a plurality of water pumps are arranged on the water outlet pipe, a siphon assembly is arranged on the water outlet pipe between the water pump and the cooling water pool, a filter assembly is arranged on the water outlet pipe between the water pump and the mold temperature control device, a pressure sensor is arranged on the water outlet pipe between the filter assembly and the mold temperature control device, and a first temperature sensor and a second temperature sensor are arranged on the water inlet pipe and the water return pipe respectively; The pressure sensor is electrically connected to the plurality of water pumps, and the first temperature sensor and the second temperature sensor are electrically connected to a cooling device.

2. A die casting workshop cooling water system according to claim 1, characterized in that: The mold temperature control device includes multiple mold temperature controllers connected to the die-casting machine, and a third valve is provided at the connection between the multiple mold temperature controllers and the water outlet pipe. The mold temperature controller is used to accurately and stably control the temperature of cooling water entering the mold.

3. A cooling water system for a die casting workshop according to claim 1, characterized in that: The cooling device includes a plurality of cooling towers, and the first temperature sensor and the second temperature sensor are electrically connected to fans of the cooling towers.

4. A die casting workshop cooling water system according to claim 1, characterized in that: The plurality of water pumps are all variable frequency water pumps and are connected in parallel with each other.

5. A die casting workshop cooling water system according to claim 1, characterized in that: The siphon assembly includes a siphon tank.

6. A die casting workshop cooling water system according to claim 1, characterized in that: A lower liquid level sensor is arranged in the cooling water pool, and the lower liquid level sensor is electrically connected to the water pump.

7. A cooling water system for a die casting workshop according to claim 1, characterized in that: The filter assembly includes two or more filters connected in parallel, and a first valve is provided at the water inlet end of the filter.

8. A cooling water system for a die casting workshop according to claim 7, characterized in that: The filter assembly also includes a connecting pipe connected in parallel with the multiple filters, and a second valve is arranged on the connecting pipe.

9. A cooling water system for a die casting workshop according to claim 8, characterized in that: The connecting pipe is provided with a water quality detection sensor for detecting the turbidity of cooling water.

10. A cooling water system for a die casting workshop according to claim 7 or 8, characterized in that: The water inlet end and the water outlet end of the filter are respectively provided with a first flow sensor and a second flow sensor, and the filter is a self-cleaning filter.

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