Cooling water system of injection molding machine

Abstract

The utility model discloses a cooling water system of an injection molding machine, which comprises a control cabinet, a water tank, a water inlet pipeline, a water return pipeline, a cooling water recovery pump and a closed cooling water tower, a pressure detection sensor and a temperature detection sensor are further connected between the water inlet pipeline and the output end of the closed cooling water tower, one end of the water return pipeline is connected with the input end of a cooling water recovery pump, and the output end of the cooling water recovery pump is connected with the input end of the closed cooling water tower through a pressure tank. The output end of the water tank is connected with a water inlet of the pressure tank, and the control cabinet is electrically connected with the cooling water recovery pump, the pressure tank, the pressure detection sensor and the temperature detection sensor. According to the structure, only one cooling water recycling pump is matched with the pressure tank, a water pump on the water inlet pipe is omitted, and energy conservation, environmental protection and energy consumption reduction are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of injection molding machine water supply system, specifically to a cooling water system of injection molding machine. BACKGROUND

[0002] The specific working principle of the injection molding machine cooling water supply system is as follows: tap water is supplemented into the water tank through the water supplementing system, then the water in the water tank is pumped into the injection molding machine by the water pump to cool the injection molding machine, the cooled water is transported to the cooling tower through the water return pipeline, and then is returned to the water tank in the form of free fall after temperature reduction treatment, but this way needs to select a large enough water pump (20 kilowatt power water pump is generally used at present) according to the number of injection molding machines in the workshop, the more the number of injection molding machines, the greater the power of the water pump needs to be, which undoubtedly increases the overall energy consumption of the water pump and improves the cost, therefore, how to design an energy-saving cooling system is particularly important. SUMMARY

[0003] The utility model discloses a cooling water system of injection molding machine to solve the problem that the existing injection molding machine cooling water supply system has large water pump energy consumption and high cost in the background art.

[0004] To achieve the above object, the utility model provides the following technical scheme: a cooling water system of injection molding machine, including control cabinet, water tank, water inlet pipeline, water return pipeline, cooling water recovery pump and closed cooling water tower, one end of water inlet pipeline is connected with the output end of a closed cooling water tower, still be connected with pressure detection sensor and temperature detection sensor between water inlet pipeline and the output end of closed cooling water tower, one end of water return pipeline is connected with the input end of cooling water recovery pump, the output end of cooling water recovery pump is connected with the input end of closed cooling water tower through a pressure tank, the output end of water tank is connected with the water inlet of pressure tank, control cabinet is connected with cooling water recovery pump, pressure tank, pressure detection sensor and temperature detection sensor.

[0005] As preferred, in order to realize the reuse of water, the water tank is connected with the soft water treatment equipment between the pressure tank, the output end of the soft water treatment equipment is connected with the water inlet of the pressure tank, and the input end of the soft water treatment equipment is connected with the output end of the water tank and the blowdown of the pressure tank respectively.

[0006] As preferred, in order to realize filtration and one-way flow of water, a one-way valve and a turbine butterfly valve one are connected in sequence between the output end of the cooling water recovery pump and the pressure tank, and a turbine butterfly valve two and a Y-shaped filter are connected between the input end of the cooling water recovery pump and the water return pipeline.

[0007] As preferred, in order to realize the late exhaust, an automatic exhaust valve connected with the control cabinet is further arranged on the return water pipeline.

[0008] As preferred, the automatic water tank water supplement function is realized, and a total water inlet pipeline is arranged on the water tank, and a water supplement electromagnetic valve electrically connected with the control cabinet is connected on the total water inlet pipeline.

[0009] As preferred, the energy saving and environmental protection are further realized, and the cooling water recovery pump adopts a variable frequency water pump.

[0010] Compared with the prior art, the beneficial effects of the utility model are that: compared with the prior art using a high-power water pump, the structure further uses a low-power water pump, finally realizes energy saving and reduces energy consumption, and in the structure, the speed and the number of the cooling water recovery pump can be automatically adjusted through the control cabinet, the water supply pressure is kept constant, and the use energy consumption is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a structure schematic view of a cooling water system of an injection molding machine in the embodiment.

[0012] In the drawing: control cabinet 1, water tank 2, water inlet pipeline 3, return water pipeline 4, closed cooling water tower 6, pressure detection sensor 7, temperature detection sensor 8, cooling water recovery pump 9, pressure tank 10, soft water treatment equipment 11, one-way valve 12, turbine butterfly valve 1 13, turbine butterfly valve 2 14, Y-shaped filter 15, automatic exhaust valve 16, total water inlet pipeline 17, water supplement electromagnetic valve 5, injection molding machine 18. DETAILED DESCRIPTION

[0013] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, and all other embodiments obtained by the person skilled in the art without creative labor based on the embodiments in the utility model belong to the protection scope of the utility model.

[0014] In addition, the terms "first", "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0015] Embodiment 1

[0016] Please refer to Figure 1As shown in the cooling water system of the injection molding machine disclosed by the embodiment, the system comprises a control cabinet 1, a water tank 2, a water inlet pipeline 3, a water return pipeline 4, a cooling water recovery pump 9 and a closed cooling water tower 6, and further realizes energy saving and environmental protection. The cooling water recovery pump 9 is a variable frequency water pump. One end of the water inlet pipeline 3 is connected to an output end of the closed cooling water tower 6. A pressure detection sensor 7 and a temperature detection sensor 8 are further connected between the water inlet pipeline 3 and the output end of the closed cooling water tower 6. One end of the water return pipeline 4 is connected to an input end of the cooling water recovery pump 9. An output end of the cooling water recovery pump 9 is connected to an input end of the closed cooling water tower 6 through a pressure tank 10. An output end of the water tank 2 is connected to a water inlet of the pressure tank 10. The control cabinet 1 is electrically connected to the cooling water recovery pump 9, the pressure tank 10, the pressure detection sensor 7 and the temperature detection sensor 8. The control cabinet 1 is a constant temperature and constant pressure variable frequency cabinet.

[0017] As a preferred, in order to realize the water reuse, the water tank 2 and pressure tank 10 between connecting soft water treatment equipment 11, the output of the soft water treatment equipment 11 and the water inlet of the pressure tank 10 are connected, the input of the soft water treatment equipment 11 and the output of the water tank 2 and the blowdown of the pressure tank 10 are connected, in the embodiment, the soft water treatment equipment 11 is prior art and thus not described in detail, which mainly comprises a sand wheel device, a carbon filter and a softener connected in sequence.

[0018] As a preferred, in order to realize the filtration and the one-way flow of water, a one-way valve 12 and a turbine butterfly valve 13 are connected in sequence between the output of the cooling water recovery pump 9 and the pressure tank 10. A turbine butterfly valve 14 and a Y-type filter 15 are connected between the input of the cooling water recovery pump 9 and the water return pipeline 4. In the embodiment, the one-way valve 12 is connected between the output of the cooling water recovery pump 9 and the pressure tank 10, so that water can only flow from the cooling water recovery pump 9 to the pressure tank 10. The Y-type filter 15 is connected between the input of the cooling water recovery pump 9 and the water return pipeline 4, so as to filter water.

[0019] As a preferred, in order to realize the late exhaust, an automatic exhaust valve 16 connected with the control cabinet 1 is further arranged on the water return pipeline 4. In the embodiment, the automatic exhaust valve 16 is added to automatically exhaust the water return pipeline 4, so as to avoid the problem of pipeline burst caused by high pressure.

[0020] As a preferred, the automatic water supply function of the water tank 2 is realized. A total water inlet pipeline 17 is arranged on the water tank 2. A water supply electromagnetic valve 5 electrically connected with the control cabinet 1 is arranged on the total water inlet pipeline 17. In the embodiment, the total water inlet pipeline 17 is used to supply tap water to the water tank 2, and the water supply electromagnetic valve 5 is used to automatically supply water to the water tank 2, so as to further improve the work efficiency.

[0021] The working principle of the structure is as follows: a plurality of injection molding machines 18 are distributed in the workshop, and the water inlet pipeline 3 and the water return pipeline 4 are respectively located on each injection molding machine 18, and one total water inlet of the water inlet pipeline 3 is connected with the closed cooling water tower 6, and the total recovery port of the water return pipeline 4 is connected with the cooling water recovery pump 9 (how the water inlet pipeline 3 and the water return pipeline 4 are distributed on the injection molding machine 18 belongs to the conventional technology in the art, so it is not described in detail), in operation, by increasing the pressure tank 10, the water in the pressure tank 10 is allowed to work through the closed cooling water tower 6, so that the internal pressure of the pressure tank 10 rises, the internal pressure is compressed to form a certain air pressure (and the air pressure can be adjusted to reach 2-5 kg), then the water is pressed into the closed cooling water tower 6 for cooling, then returns to the workshop through the water inlet pipeline 3, and finally the water in the workshop is pressure-kept, then under the action of the cooling water recovery pump 9, the water in the entire pipeline is continuously circulated, and since the cooling water recovery pump 9 only allows the water to move, the power of the cooling water recovery pump 9 is relatively low, and in the embodiment, only a water pump with a power of 11 kW is used, compared with the high-power water pump used in the prior art, the structure further uses a low-power water pump, finally realizes energy saving and reduces energy consumption, and in the structure, the speed and the number of the cooling water recovery pump 9 can be automatically adjusted by the control cabinet 1 to keep the water pressure constant and reduce the energy consumption.

[0022] Moreover, in actual operation, if multiple water pumps are used, the "first start first stop" and "cumulative time switching" principles can be used to prolong the service life of the water pump; the water pump uses soft start to eliminate water hammer phenomenon. When a water pump fails, it automatically switches to other water pumps for operation and sends an alarm, and compared with the traditional pipeline structure, the same-path water inlet pipeline structure can be used without adjusting the end valve, and at a lower water supply pressure, it can ensure that each device in multiple parallel devices has the same water supply and return pressure difference and circulating water volume, thereby reducing the use cost and energy consumption.

[0023] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A cooling water system of an injection molding machine, comprising a control cabinet (1), a water tank (2), a water inlet pipeline (3), a water return pipeline (4), a cooling water recovery pump (9) and a closed cooling water tower (6), characterized in that: One end of the water inlet pipeline (3) is connected with the output end of a closed cooling water tower (6), and a pressure detection sensor (7) and a temperature detection sensor (8) are further connected between the water inlet pipeline (3) and the output end of the closed cooling water tower (6); one end of the water return pipeline (4) is connected with the input end of a cooling water recovery pump (9), the output end of the cooling water recovery pump (9) is connected with the input end of the closed cooling water tower (6) through a pressure tank (10), the output end of the water tank (2) is connected with the water inlet of the pressure tank (10), and the control cabinet (1) is electrically connected with the cooling water recovery pump (9), the pressure tank (10), the pressure detection sensor (7) and the temperature detection sensor (8).

2. A cooling water system for an injection molding machine as defined in claim 1, wherein: A soft water treatment device (11) is connected between the water tank (2) and the pressure tank (10), the output end of the soft water treatment device (11) is connected with the water inlet of the pressure tank (10), and the input end of the soft water treatment device (11) is connected with the output end of the water tank (2) and the blowdown port of the pressure tank (10) respectively.

3. A cooling water system for an injection molding machine according to claim 1 or 2, characterized in that: A one-way valve (12) and a turbine butterfly valve I (13) are sequentially connected between the output end of the cooling water recovery pump (9) and the pressure tank (10), and a turbine butterfly valve II (14) and a Y-type filter (15) are connected between the input end of the cooling water recovery pump (9) and the water return pipeline (4).

4. A cooling water system for an injection molding machine according to claim 1 or 2, characterized in that: An automatic exhaust valve (16) connected with the control cabinet (1) is further arranged on the water return pipeline (4).

5. A cooling water system for an injection molding machine as set forth in claim 1 or 2, characterized in that: A total water inlet pipeline (17) is arranged on the water tank (2), and a water replenishment electromagnetic valve (5) electrically connected with the control cabinet (1) is arranged on the total water inlet pipeline (17).

6. A cooling water system for an injection molding machine according to claim 1 or 2, characterized in that: The cooling water recovery pump (9) is a variable frequency water pump.

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