A large die-casting machine punch sleeve cooling device

Abstract

The utility model discloses a cooling device for a punch sleeve of a large die-casting machine, including a chilled water circulation system and a chilled water cooling system, wherein the chilled water circulation system includes a chilled water inlet pipe and a chilled water outlet pipe, wherein one end of the chilled water inlet pipe and the chilled water outlet pipe are respectively connected to a water tank, and the other end is respectively connected to the chilled water cooling system, wherein a water pump is arranged on the chilled water inlet pipe, and the punch sleeve is arranged on the chilled water inlet pipe; the chilled water cooling system is provided with a chilled water temperature control component, and also includes an air blowing drainage system, wherein the air blowing drainage system is used to discharge the accumulated water in the internal pipeline of the chilled water cooling system; and also includes a controller. The utility model can accurately and quickly control the chilled water temperature to stably control the working temperature of the punch sleeve, extend the service life of the punch sleeve, and reduce the maintenance cost; and can clean the water in the internal pipelines of the evaporator and the condenser to prevent the cooling device from being damaged due to freezing at low temperature.

Description

Technical Field

[0001] The utility model relates to the technical field of die-casting cooling, in particular to a cooling device for a punch sleeve of a large die-casting machine. Background Art

[0002] In the field of large-scale die-casting production, the punch and the sleeve are the main components of the die-casting machine's injection part, and the cost is also high; because the uninterrupted friction work every day will generate high temperature, if this continues for a long time and no measures are taken to control the working temperature, it will cause early damage to the punch and the sleeve.

[0003] However, the cooling device of the prior art cannot accurately control the temperature of the chilled water entering the punch and the jacket, and thus cannot stably control the working temperature of the punch jacket, and is therefore not suitable for cooling the punch jacket of a large die-casting machine.

[0004] In addition, the existing cooling device lacks an air blowing antifreeze function. In the winter when the temperature is low, the accumulated water in the internal pipes of the cooling device components is prone to freezing and expansion. Moreover, long-term accumulation of water in the internal pipes is prone to corrosion, causing damage to the internal pipes and making them unable to work normally, seriously affecting the service life of the cooling device.

[0005] Therefore, it is necessary to develop a large-scale die-casting machine punch jacket cooling device, which can accurately and quickly control the temperature of the chilled water entering the punch and jacket to stably control the working temperature of the punch jacket, extend the service life of the punch jacket, and reduce maintenance costs; and can blow clean the water in the internal pipes of the evaporator and condenser to prevent the cooling device from being damaged due to freezing at low temperature. Utility Model Content

[0006] In order to solve the above problems, the technical solutions adopted by the utility model are as follows:

[0007] A large die-casting machine punch sleeve cooling device, comprising a chilled water circulation system connected to the punch sleeve, and a chilled water cooling system connected to the chilled water circulation system, characterized in that the chilled water circulation system comprises a chilled water inlet pipe and a chilled water outlet pipe, one end of the chilled water inlet pipe and the chilled water outlet pipe are respectively connected to a water tank, and the other end is respectively connected to the chilled water cooling system, a water pump is provided on the chilled water inlet pipe, and the punch sleeve is provided on the chilled water inlet pipe;

[0008] The chilled water cooling system is provided with a chilled water temperature control component, which is used to accurately and quickly control the temperature of the chilled water entering the punch sleeve;

[0009] It also includes an air blowing drainage system connected to the chilled water cooling system, and the air blowing drainage system is used to drain the accumulated water in the internal pipeline of the chilled water cooling system;

[0010] The system also includes a controller which is electrically connected to the water pump, the air blowing and drainage system, the chilled water circulation system and the chilled water cooling system.

[0011] Preferably, the chilled water cooling system comprises an evaporator, a compressor, a condenser, an air pipe and a liquid pipe;

[0012] The chilled water inlet pipe and the chilled water outlet pipe are connected to the evaporator respectively, one end of the gas pipe is connected to the evaporator, and the other end is connected to the condenser through the compressor, the two ends of the liquid pipe are connected to the evaporator and the condenser respectively, and the condenser is connected to the cooling water through the cooling water inlet pipe and the cooling water outlet pipe;

[0013] The chilled water temperature control component is arranged on the liquid pipe;

[0014] The air blowing and drainage system is connected with the evaporator and the condenser.

[0015] Preferably, the chilled water temperature control assembly includes a hot gas bypass pipe, a first temperature control valve and a second temperature control valve, the connection point between the hot gas bypass pipe and the gas pipe is located between the compressor and the condenser, and the other end of the hot gas bypass pipe is connected to the liquid pipe; the first temperature control valve is arranged on the hot gas bypass pipe, and the second temperature control valve is arranged on the end of the liquid pipe close to the evaporator.

[0016] Preferably, the air blowing drainage system comprises a compressed air source, a first air inlet pipe and a second air inlet pipe, one end of the first air inlet pipe is connected to the compressed air source, and the other end is connected to the chilled water outlet pipe, and one end of the second air inlet pipe is connected to the compressed air source, and the other end is connected to the cooling water inlet pipe;

[0017] Check valves are provided on the chilled water outlet pipe and the cooling water inlet pipe.

[0018] Preferably, the air blowing drainage system further includes a first valve and a second valve, wherein the first valve is arranged on the first air inlet pipe, and the second valve is arranged on the second air inlet pipe.

[0019] Preferably, the first valve and the second valve can be intermittently opened and closed under the control of the controller, so that the compressed air in the compressed air source can be intermittently blown to the internal pipelines of the evaporator and the condenser through the first air inlet pipe and the second air inlet pipe respectively.

[0020] Preferably, the air blowing drainage system further includes drainage valves arranged on the chilled water inlet pipe and the cooling water outlet pipe.

[0021] Preferably, a first temperature sensor and a second temperature sensor are respectively provided on the chilled water inlet pipe and the chilled water outlet pipe.

[0022] Preferably, a third temperature sensor is provided on the punch sleeve, and a water flow regulating valve is provided on the chilled water inlet pipe.

[0023] Preferably, a filter is provided at one end of the hot gas bypass pipe located at the first temperature control valve away from the evaporator, and a filter is provided at one end of the liquid pipe located at the second temperature control valve close to the condenser.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. The temperature of the low-pressure, liquid refrigerant entering the evaporator is controlled by setting a second temperature control valve on the liquid pipe and a first temperature control valve on the gas pipe. The temperature of the refrigerant in the chilled water cooling system is accurately controlled, so that the temperature of the chilled water entering the punch and the jacket can be accurately and quickly controlled to stably control the working temperature of the punch jacket, thereby extending the service life of the punch jacket and reducing maintenance costs.

[0026] 2. Under the action of compressed air, the water in the internal pipes of the evaporator and condenser can be blown clean to prevent the cooling device from being damaged due to freezing at low temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the utility model;

[0028] Among them: a chilled water circulation system 1, a chilled water cooling system 2, a chilled water temperature control component 3, an air blowing and drainage system 4, a chilled water inlet pipe 11, a chilled water outlet pipe 12, a water tank 13, a water pump 14, a punch sleeve 10, a cooling water inlet pipe 20, a cooling water outlet pipe 30, a check valve 40, a first temperature sensor 50, a second temperature sensor 60, a third temperature sensor 70, a water flow regulating valve 80, a filter 90, an evaporator 21, a compressor 22, a condenser 23, an air pipe 24, a liquid pipe 25, a hot gas bypass pipe 31, a first temperature control valve 32, a second temperature control valve 33, a compressed air source 41, a first air inlet pipe 42, a second air inlet pipe 43, a first valve 44, a second valve 45, and a drain valve 46. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] 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.

[0032] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:

[0033] like Figure 1 As shown, a cooling device for a punch sleeve 10 of a large die-casting machine includes a chilled water circulation system 1 connected to the punch sleeve 10, and a chilled water cooling system 2 connected to the chilled water circulation system 1, wherein the chilled water circulation system 1 includes a chilled water inlet pipe 11 and a chilled water outlet pipe 12, wherein one end of the chilled water inlet pipe 11 and the chilled water outlet pipe 12 are respectively connected to a water tank 13, and the other end is respectively connected to the chilled water cooling system 2, wherein a water pump 14 is provided on the chilled water inlet pipe 11, and the punch sleeve 10 is provided on the chilled water inlet pipe 11;

[0034] The chilled water cooling system 2 is provided with a chilled water temperature control component 3, and the chilled water temperature control component 3 is used to accurately and quickly control the temperature of the chilled water entering the punch sleeve 10;

[0035] It also includes an air blowing drainage system 4 connected to the chilled water cooling system 2, and the air blowing drainage system 4 is used to drain the accumulated water in the internal pipeline of the chilled water cooling system 2;

[0036] It also includes a controller (not shown in the figure), which is electrically connected to the water pump 14, the air blowing and drainage system 4, the chilled water circulation system 1 and the chilled water cooling system 2.

[0037] In this embodiment, when the die-casting machine is running, under the action of the controller, the water pump 14 works continuously, so that the chilled water after absorbing heat by the punch sleeve 10 enters the chilled water cooling system 2 for heat exchange, and under the action of the chilled water temperature control component 3, the chilled water of the required temperature is formed to be continuously supplied to the punch sleeve 10.

[0038] In this embodiment, in winter when the temperature is relatively low, the chilled water refrigeration system stops running. At this time, the accumulated water in the internal pipes is blown away by the air blowing drainage system 4 to prevent the internal pipes from being damaged due to freezing at low temperatures, thereby effectively protecting the cooling device.

[0039] Further, such as Figure 1 As shown, the chilled water cooling system 2 includes an evaporator 21, a compressor 22, a condenser 23, an air pipe 24 and a liquid pipe 25;

[0040] The chilled water inlet pipe 11 and the chilled water outlet pipe 12 are respectively connected to the evaporator 21, one end of the gas pipe 24 is connected to the evaporator 21, and the other end is connected to the condenser 23 through the compressor 22, the two ends of the liquid pipe 25 are respectively connected to the evaporator 21 and the condenser 23, and the condenser 23 is connected to the cooling water through the cooling water inlet pipe 20 and the cooling water outlet pipe 30;

[0041] The chilled water temperature control assembly 3 is arranged on the liquid pipe 25;

[0042] The air blowing drainage system 4 is connected to the evaporator 21 and the condenser 23 .

[0043] In this embodiment, the working principle of the chilled water cooling system 2 is as follows: the refrigerant flows in the liquid pipe 25 and the gas pipe 24. First, the low-pressure gaseous refrigerant enters the compressor 22 and forms a high-pressure gaseous state. The high-pressure gaseous refrigerant is heat-exchanged with the cooling water in the condenser 23 to form a high-pressure liquid state. The high-pressure liquid refrigerant is converted into a low-pressure liquid state under the action of the expansion valve.

[0044] Then the chilled water temperature control component 3 adjusts the temperature of the low-pressure, liquid refrigerant entering the evaporator 21 to a set temperature range; then the low-pressure, liquid refrigerant enters the evaporator 21 to exchange heat with the chilled water after absorbing heat, and the stable low-temperature chilled water enters the punch sleeve 10 to cool the punch sleeve 10. The low-pressure, liquid refrigerant absorbs heat to form a low-pressure gas, and the low-pressure gas refrigerant enters the compressor 22 to form a high-pressure gas, thereby continuously cooling the chilled water in a cycle.

[0045] Further, such as Figure 1 As shown, the chilled water temperature control assembly 3 includes a hot gas bypass pipe 31, a first temperature control valve 32 and a second temperature control valve 33. The connection point between the hot gas bypass pipe 31 and the gas pipe 24 is located between the compressor 22 and the condenser 23, and the other end of the hot gas bypass pipe 31 is connected to the liquid pipe 25; the first temperature control valve 32 is arranged on the hot gas bypass pipe 31, and the second temperature control valve 33 is arranged at one end of the liquid pipe 25 close to the evaporator 21.

[0046] In this embodiment, the first temperature control valve 32 is used to control the temperature of the high-pressure, gaseous refrigerant entering the liquid pipe 25 ; the second temperature control valve 33 is used to control the temperature of the low-pressure, liquid refrigerant in the liquid pipe 25 .

[0047] In this embodiment, the temperature of the refrigerant entering the hot gas bypass pipe 31 is higher than the temperature of the refrigerant entering the liquid pipe 25; when the temperature of the low-pressure, liquid refrigerant is lower than the temperature control range of the second temperature control valve 33, the high-pressure, liquid refrigerant enters the liquid pipe 25 after passing through the first temperature control valve 32 and mixes with the low-pressure, liquid refrigerant at a low temperature, thereby raising the temperature of the low-pressure, liquid refrigerant entering the evaporator 21 to a set temperature range, thereby quickly restoring the temperature of the chilled water to the set temperature range value, thereby accurately and quickly controlling the temperature of the chilled water.

[0048] The above structure controls the temperature of the low-pressure, liquid refrigerant entering the evaporator 21 by setting a second temperature control valve 33 on the liquid pipe 25 and a first temperature control valve 32 on the gas pipe 24, and accurately controls the temperature of the refrigerant in the chilled water cooling system 2, so as to accurately and quickly control the temperature of the chilled water entering the punch and the sleeve, and stably control the working temperature of the punch sleeve 10, thereby extending the service life of the punch sleeve 10 and reducing maintenance costs.

[0049] Further, such as Figure 1 As shown, the air blowing drainage system 4 includes a compressed air source 41, a first air inlet pipe 42 and a second air inlet pipe 43, one end of the first air inlet pipe 42 is connected to the compressed air source 41, and the other end is connected to the chilled water outlet pipe 12, and one end of the second air inlet pipe 43 is connected to the compressed air source 41, and the other end is connected to the cooling water inlet pipe 20;

[0050] The chilled water outlet pipe 12 and the cooling water inlet pipe 20 are provided with a check valve 40 .

[0051] Further, such as Figure 1 As shown, the air blowing drainage system 4 further includes a first valve 440 and a second valve 45 , wherein the first valve 440 is disposed on the first air inlet pipe 42 , and the second valve 45 is disposed on the second air inlet pipe 43 .

[0052] In this embodiment, during the air blowing and drainage, the chilled water circulation system 1 and the chilled water cooling system 2 stop running.

[0053] The compressed air in the compressed air source 41 passes through the first air inlet pipe 42 and the second air inlet pipe 43 and is blown toward the pipes inside the evaporator 21 and the condenser 23 respectively. Under the action of the compressed air, the accumulated water in the evaporator 21 and the condenser 23 is forced to be discharged from the chilled water inlet pipe 11 and the cooling water outlet pipe 30 respectively, to prevent the accumulated water in the evaporator 21 and the condenser 23 from freezing and expanding after the temperature drops to zero degrees, causing damage to the internal pipes of the evaporator 21 and the condenser 23.

[0054] In this embodiment, the first valve 440 and the second valve 45 are solenoid valves.

[0055] Further, such as Figure 1 As shown, the first valve 440 and the second valve 45 can be intermittently opened and closed under the control of the controller, so that the compressed air in the compressed air source 41 is intermittently blown to the internal pipelines of the evaporator 21 and the condenser 23 through the first air inlet pipe 42 and the second air inlet pipe 43 respectively.

[0056] In this embodiment, the interval time of intermittent on-off blowing is set as follows: after the chilled water cooling system 2 stops running, the blowing is turned on and off every 1 to 5 minutes, and after 20 to 30 minutes, the blowing is turned on and off every 5 to 30 minutes, and after 3 to 4 hours, the blowing is turned on and off every 1 to 4 hours.

[0057] In other embodiments, different interval times may be set according to the pressure of the compressed gas source 4110, the specifications of the evaporator 21 and the condenser 23, and the operating conditions.

[0058] Further, such as Figure 1 As shown, the air blowing drainage system 4 also includes a drainage valve 46 arranged on the chilled water inlet pipe 11 and the cooling water outlet pipe 30.

[0059] In this embodiment, the drain valve 46 is a solenoid valve, and the drain valve 46 is used to force the accumulated water in the evaporator 21 and the condenser 23 to be discharged from the chilled water inlet pipe 11 and the cooling water outlet pipe 30 respectively when blowing air to drain water.

[0060] Further, such as Figure 1 As shown, the chilled water inlet pipe 11 and the chilled water outlet pipe 12 are respectively provided with a first temperature sensor 50 and a second temperature sensor 60 .

[0061] In this embodiment, the first temperature sensor 50 is used to detect the temperature of the chilled water flowing into the evaporator 21, and the second temperature sensor 60 is used to detect the temperature of the chilled water after heat exchange in the evaporator 21; the above structure controls the temperature of the low-pressure, liquid refrigerant entering the evaporator 21 through the chilled water temperature values ​​monitored by the first temperature sensor 50 and the second temperature sensor 60, so that the punch sleeve 10 is stably maintained within the set working temperature range.

[0062] Further, such as Figure 1 As shown, a third temperature sensor 70 is provided on the punch sleeve 10 , and a water flow regulating valve 80 is provided on the chilled water inlet pipe 11 .

[0063] In this embodiment, the third temperature sensor 70 is used to detect the temperature of the punch sleeve 10. When the detected temperature value is higher than the set range value, the opening of the water flow regulating valve 80 is controlled to increase the flow rate of the chilled water, so that the temperature of the punch sleeve 10 can be accurately and controllably maintained within the set range.

[0064] Further, such as Figure 1 As shown, the hot gas bypass pipe 31 is provided with a filter 90 at one end of the first temperature control valve 32 away from the evaporator 21 , and the liquid pipe 25 is provided with a filter 90 at one end of the second temperature control valve 33 close to the condenser 23 .

[0065] In this embodiment, impurities in the refrigerant are filtered and moisture in the refrigerant is absorbed to ensure the cleanliness and purity of the refrigerant, to ensure that the refrigeration capacity is maximized, and to make the refrigeration precise and controllable.

[0066] 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 large die-casting machine punch sleeve cooling device, comprising a chilled water circulation system connected to the punch sleeve, and a chilled water cooling system connected to the chilled water circulation system, characterized in that: The chilled water circulation system comprises a chilled water inlet pipe and a chilled water outlet pipe, one end of the chilled water inlet pipe and the chilled water outlet pipe are respectively connected to the water tank, and the other end is respectively connected to the chilled water cooling system, a water pump is arranged on the chilled water inlet pipe, and the punch sleeve is arranged on the chilled water inlet pipe; The chilled water cooling system is provided with a chilled water temperature control component, which is used to accurately and quickly control the temperature of the chilled water entering the punch sleeve; It also includes an air blowing drainage system connected to the chilled water cooling system, and the air blowing drainage system is used to drain the accumulated water in the internal pipeline of the chilled water cooling system; The system also includes a controller which is electrically connected to the water pump, the air blowing and drainage system, the chilled water circulation system and the chilled water cooling system.

2. A large die-casting machine punch sleeve cooling device according to claim 1, characterized in that: The chilled water cooling system includes an evaporator, a compressor, a condenser, an air pipe and a liquid pipe; The chilled water inlet pipe and the chilled water outlet pipe are connected to the evaporator respectively, one end of the gas pipe is connected to the evaporator, and the other end is connected to the condenser through the compressor, the two ends of the liquid pipe are connected to the evaporator and the condenser respectively, and the condenser is connected to the cooling water through the cooling water inlet pipe and the cooling water outlet pipe; The chilled water temperature control component is arranged on the liquid pipe; The air blowing and drainage system is connected with the evaporator and the condenser.

3. A large die-casting machine punch sleeve cooling device according to claim 2, characterized in that: The chilled water temperature control assembly includes a hot gas bypass pipe, a first temperature control valve and a second temperature control valve. The connection point between the hot gas bypass pipe and the gas pipe is located between the compressor and the condenser, and the other end of the hot gas bypass pipe is connected to the liquid pipe. The first temperature control valve is arranged on the hot gas bypass pipe, and the second temperature control valve is arranged at one end of the liquid pipe close to the evaporator.

4. A large die-casting machine punch sleeve cooling device according to claim 2, characterized in that: The air blowing and drainage system comprises a compressed air source, a first air inlet pipe and a second air inlet pipe, wherein one end of the first air inlet pipe is connected to the compressed air source and the other end is connected to the chilled water outlet pipe, and one end of the second air inlet pipe is connected to the compressed air source and the other end is connected to the cooling water inlet pipe; Check valves are provided on the chilled water outlet pipe and the cooling water inlet pipe.

5. A large die-casting machine punch sleeve cooling device according to claim 4, characterized in that: The air blowing drainage system further comprises a first valve and a second valve, wherein the first valve is arranged on the first air inlet pipe, and the second valve is arranged on the second air inlet pipe.

6. A large die-casting machine punch sleeve cooling device according to claim 5, characterized in that: The first valve and the second valve can be intermittently opened and closed under the control of the controller, so that the compressed air in the compressed air source can be intermittently blown to the internal pipelines of the evaporator and the condenser through the first air inlet pipe and the second air inlet pipe respectively.

7. A large die-casting machine punch sleeve cooling device according to claim 2, characterized in that: The air blowing drainage system also includes drainage valves arranged on the chilled water inlet pipe and the cooling water outlet pipe.

8. A large die casting machine punch sleeve cooling device according to claim 2, characterized in that: The chilled water inlet pipe and the chilled water outlet pipe are respectively provided with a first temperature sensor and a second temperature sensor.

9. A large die-casting machine punch sleeve cooling device according to claim 2, characterized in that: The punch sleeve is provided with a third temperature sensor, and the chilled water inlet pipe is provided with a water flow regulating valve.

10. A large die-casting machine punch sleeve cooling device according to claim 3, characterized in that: The hot gas bypass pipe is provided with a filter at one end of the first temperature control valve away from the evaporator, and the liquid pipe is provided with a filter at one end of the second temperature control valve close to the condenser.

Images