Circulation vacuum cooling noise reduction system for foam molding equipment

Abstract

The present invention relates to a circulating vacuum cooling noise reduction system for foam molding equipment. A vacuum pump forms a vacuum cavity inside a condenser tank and a buffer tank, so that a condenser tube forms a vacuum negative pressure environment and then extracts high-temperature mixed gas in the foam molding equipment. After the high-temperature mixed gas enters the condenser tank, the high-temperature mixed gas passes through vertically stacked corrugated fillers, and then is sprayed and cooled by a spray mechanism. Due to the negative pressure vacuum cavity, a water inlet pipe sends cooling water in a clean water tank under normal air pressure into the spray pipe, and then the high-temperature mixed gas in the corrugated filler is sprayed and cooled by a spray nozzle. In the spraying process, harmful substances such as dust and foaming agent are also washed away to avoid pollution of the workshop. At the same time, the cooling water in the clean water tank can supply water to the spray mechanism, and the sewage tank is used to receive wastewater generated by the circulating vacuum cooling noise reduction system of the foam molding equipment, and is recycled and reused after filtering, so as to achieve the technical effect of energy saving and environmental protection.

Description

Technical Field

[0001] The invention relates to the field of foam molding equipment, in particular to a circulating vacuum cooling noise reduction system for foam molding equipment. Background Art

[0002] Foam molding equipment is mainly used for compression molding of foam materials, and heating and plasticization are often used. Existing foam molding equipment includes a frame, a feeding mechanism and a molding mechanism installed on the frame, and the molding mechanism includes a fixed template installed on the frame, a mobile template, and a hydraulic cylinder for driving the mobile template to press or move away from the fixed template. After the mobile template and the fixed template are molded together, a mold cavity will be formed between the two, and foam plastics are filled into the mold cavity through the feeding mechanism, and then high-temperature steam is used to expand the raw material particles in the mold cavity. After molding, demolding and unloading are required. Since the product is prepared in an environment of high-temperature steam, the temperature of the product is very high, which is not convenient for manual unloading, and because of the high temperature and the expansion of the product, the product is in close contact with the mold, and the demolding operation of the product is not easy. Therefore, before demolding and unloading of the product, it is generally necessary to cool the product, but in order to avoid the cooling temperature being too low, the mold needs to be preheated for a long time when the next product is produced, so the temperature after cooling is generally kept above 70 degrees Celsius.

[0003] The traditional cooling method is to pass cooling water into the mold cavity. Such an operation often leads to a long cooling time, which affects production efficiency. Moreover, although cooling by cooling water improves the cooling efficiency, a large amount of water will remain on the product, resulting in a high moisture content of the product. Dehydration work is required in the follow-up, which increases the production process, prolongs the production cycle, and reduces production efficiency. At present, there is also a method of equipping the foam molding equipment with a vacuum pump for cooling. Each time the vacuum pump is started during cooling, the gas and water in the mold cavity are pumped away, but this method has the following disadvantages in actual use: 1. The vacuum pump is easy to adsorb water mist into the vacuum pump during the negative pressure exhaust process, which reduces the service life of the vacuum pump, and the vacuum pump will produce a lot of noise when exhausting air; 2. The gas extracted by the vacuum pump in the foam molding equipment is a high-temperature mixed gas, which also contains harmful substances such as dust and foaming agent. The direct discharge of these gases will affect the workshop environment and the health of workers. These gases need to be cooled and filtered before they can be discharged, but the existing cooling system cannot efficiently and stably cool and filter; 3. The method of passing cooling water into the mold cavity cannot recycle and reuse the cooling water, which does not conform to the concept of environmental protection recycling. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a circulating vacuum cooling noise reduction system for foam molding equipment in view of the deficiencies of the above-mentioned prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a circulating vacuum cooling noise reduction system for foam molding equipment, comprising a high-efficiency condensation filtering device, a noise reduction vacuum pumping device and a water circulation box, the water circulation box comprising a sewage tank and a clean water tank, a filter plate which is mutually conductive is provided between the sewage tank and the clean water tank, the high-efficiency condensation filtering device comprises a condensation tank and a buffer tank, an air inlet connected to the foam molding equipment is provided at the bottom of the condensation tank, an air outlet connected to the buffer tank is provided at the top of the condensation tank, a buffer port connected to the air outlet is provided at the top of the buffer tank, an air pumping port connected to the noise reduction vacuum pumping device is provided at the bottom, and a vacuum cavity is formed inside the condensation tank and the buffer tank through the noise reduction vacuum pumping device. The condensing tank is provided with a plurality of axially stacked corrugated packings, and the condensing tank fixes the corrugated packings between the air inlet and the air outlet through a packing fixing mechanism. The end of the condensing tank corresponding to the air outlet is provided with a spray mechanism, and the spray mechanism includes a spray pipe, and the end of the spray pipe corresponding to the corrugated packing is provided with a nozzle, and the other end extending out of the condensing tank is provided with a water inlet pipe connected to the clean water tank. The noise reduction vacuum pumping device includes a vacuum suction main pipe connected to the air suction port, a plurality of vacuum pumps and a drainage main pipe connected to the vacuum suction main pipe, and the vacuum pumps are connected to the vacuum suction main pipe through the air inlet pipe, and are connected to the drainage main pipe through the exhaust pipe, and the water is discharged into the sewage tank through the drainage main pipe.

[0006] By adopting the above technical scheme, in the circulating vacuum cooling noise reduction system of the foam molding equipment, the vacuum pump forms a vacuum cavity inside the condenser tank and the buffer tank, so that the condenser tube forms a vacuum negative pressure environment and then extracts the high-temperature mixed gas in the foam molding equipment, so that the foam is quickly cooled and demolded, ensuring that there is no air or moisture between the particles, preventing product gaps between particles, and improving the product finish. The extracted high-temperature mixed gas enters the condenser tank from the air inlet, and then a buffer tank is set. The buffer tank has a buffering effect on vacuum fluctuations. When the vacuum degree in the buffer tank drops to a certain level, the vacuum pump is started to evacuate, avoiding the water ring vacuum pump to be started to replenish when the vacuum main pipe and the vacuum branch pipe have a slight vacuum degree fluctuation, thereby avoiding frequent starting of the vacuum pump, reducing industrial energy consumption, and allowing the air pressure in the condenser tank to enter the buffer tank cache through the buffer port. After the high-temperature mixed gas enters the condenser tank, the high-temperature mixed gas will pass through the vertically stacked corrugated fillers and then pass through the The spray mechanism sprays and cools the high-temperature mixed gas. Due to the negative pressure vacuum chamber, the water inlet pipe sends the cooling water in the clean water tank under normal air pressure into the spray pipe, and then sprays and cools the high-temperature mixed gas in the corrugated filler through the nozzle. The corrugated filler has the advantages of good cooling effect, small resistance, light capacity, high strength, flame retardancy and corrosion resistance, and can greatly increase the contact area of ​​the high-temperature mixed gas. At the same time, the cold amount generated by the vacuum chamber turns the water vapor in the gas back into liquid water, reducing the vacuum pumping time, thereby achieving rapid cooling and efficient condensation. In the spraying process, harmful substances such as dust and foaming agents will be washed away to avoid pollution in the workshop. At the same time, the water circulation box is equipped with a clean water tank and a sewage tank, so that the cooling water in the clean water tank can supply water to the spray mechanism, and the sewage tank is used to receive the wastewater generated by the circulating vacuum cooling and noise reduction system of the foam molding equipment, and it is recycled and reused after filtering to achieve the technical effect of energy saving and environmental protection.

[0007] The above-mentioned circulating vacuum cooling noise reduction system of the foam molding equipment can be further configured as follows: the noise reduction vacuum device also includes a water supply tank, the vacuum pumps are all water circulation vacuum pumps, the vacuum pumps are provided with a water inlet and a water outlet, the water supply tank is provided with a plurality of water supply pipes connected to the water inlet of the vacuum pump, and the water supply tank is provided with a water replenishment pipe that supplies water to the water supply tank and is connected to the clean water tank.

[0008] By adopting the above technical scheme, in the circulating vacuum cooling and noise reduction system of the foam molding equipment, the high-temperature mixed gas extracted by the vacuum pump in the foam molding equipment causes the foam to cool and demold quickly, ensuring that there is no air or moisture between the particles, preventing product gaps between the particles, and improving the product finish. The extracted high-temperature mixed gas will be cooled in the condenser and buffered in the buffer tank before entering the vacuum suction main pipe, and then enter the water circulation vacuum pump along the air inlet pipe. The water circulation vacuum pump sends water to the water inlet along the water supply pipe through the water supply tank as the working fluid, wherein the impeller of the water circulation vacuum pump is eccentrically arranged on the drive shaft. When the impeller rotates clockwise, water is thrown around by the impeller. Due to the action of centrifugal force, the water forms a closed circular ring of approximately equal thickness determined by the shape of the pump cavity. The inner surface of the upper part of the water ring is just tangent to the impeller hub, and the inner surface of the lower part of the water ring is just in contact with the top of the blade. At this time, a crescent-shaped space is formed between the impeller hub and the water ring, and this space is divided by the impeller into several small cavities with the same number of blades. At this time, the high-temperature mixed gas is sucked in and mixed with the water medium in the vacuum pump. When the suction is finished, the small cavity is isolated from the suction port; when the impeller continues to rotate, the small cavity changes from large to small, so that the gas is compressed; when the small cavity is connected to the exhaust pipe, the steam-water mixture is discharged through the drainage main pipe outside the pump. The whole process replaces the original vacuum pump through the water supply tank and the water circulation vacuum pump, so that the high-pressure water becomes pressureless water, which avoids the vacuum pump blades from being gassed and prolongs the service life of the vacuum pump.

[0009] The above-mentioned circulating vacuum cooling noise reduction system of the foam molding equipment can be further configured as follows: the filler fixing mechanism includes a hollow bottom frame arranged above the corresponding air inlet in the vacuum chamber and a hollow pressure plate arranged above the corrugated filler, and a plurality of pressure plate brackets are arranged on the hollow pressure plate, one end of the pressure plate bracket is abutted against the hollow pressure plate, and the other end is abutted against the top of the condensation tank, and a spray water baffle is provided at one end of the spray pipe corresponding to the nozzle, and the spray water baffle is in a disc-shaped cover arranged above the corrugated filler, the nozzle is arranged through the center of the spray water baffle, and the pressure plate bracket passes through the spray water baffle and abuts against the top of the condensation tank.

[0010] By adopting the above technical scheme, a hollow pressure plate is arranged in the condensation tank, so that the corrugated filler can be axially accumulated in the hollow pressure plate, and then covered by the hollow pressure plate, and then fixed by the pressure plate bracket, so that the corrugated filler is fixed between the air inlet and the air outlet, so as to avoid the corrugated filler floating up when the condensation tank is cooled and affecting the work. By arranging a disc-shaped spray water baffle, the nozzle can always spray towards one end of the corrugated filler during spraying, thereby improving the spraying efficiency and achieving rapid cooling.

[0011] The above-mentioned circulating vacuum cooling noise reduction system of the foam molding equipment can be further configured as follows: a steam-water separator is provided between the drainage main pipe and the exhaust pipe, the bottom of the steam-water separator is connected to the drainage main pipe, and a muffler is provided on the top.

[0012] By adopting the above technical solution, impurities in the steam-water mixture are impacted on the inner wall of the steam-water separator through the steam-water separator, and the liquid containing impurities (harmful substances such as dust and foaming agent) is discharged along the drainage pipe at the bottom of the steam-water separator. The purified gas floats up and is discharged into the atmosphere after being silenced by the muffler, thereby avoiding production noise and protecting the workshop from pollution.

[0013] The above-mentioned circulating vacuum cooling noise reduction system of the foam molding equipment can be further configured as follows: the spray mechanism also includes a three-way water pipe, one end of the three-way water pipe is provided with a filter connected to the clean water tank, one end is provided with a drain valve connected to the sewage tank, and one end is connected to the water inlet pipe, the bottom of the condensation tank is provided with a condensation drain outlet connected to the sewage tank, a drainage pump assembly is provided at the condensation drain outlet, the bottom of the buffer tank is provided with a buffer drain outlet connected to the sewage tank, and a drainage pump assembly is provided at the buffer drain outlet.

[0014] By adopting the above technical solution, a three-way water pipe is set up, so that the water inlet pipe filters the water source in the pool through the filter and then sends it to the nozzle for spraying, so as to avoid the material affecting the spraying system. When the spraying is completed, the water in the water inlet pipe can be discharged by opening the drain valve. Condensation and buffer drain ports are set at the bottom of the condensation tank and the buffer tank, so that the water mist sprayed out of the condensation tank through the spraying system can be discharged from the condensation drain port and the buffer drain port, so as to avoid accumulation in the condensation tank and the buffer tank.

[0015] The above-mentioned foam molding equipment circulating vacuum cooling noise reduction system can be further configured as follows: a float valve is provided at one end of the water supply pipe corresponding to the inside of the water supply tank, and the water supply pipe switch is controlled by the float valve, an overflow port is provided above the water supply tank, a drain port connected to the sewage tank is provided at the bottom of the water supply tank, and a water tank cover is provided on the top of the water supply tank.

[0016] By adopting the above technical scheme, a float valve is set up to enable the water supply tank to automatically replenish water through the float valve, that is, when the water level in the water supply tank is low, the float on the float valve drops to open the water replenishment pipe to replenish water to the water supply tank; when the water level in the water supply tank reaches the required level, the float of the float valve floats up and automatically closes the water replenishment pipe; an overflow port is set above the water supply tank to prevent the space in the water supply tank from being overflowed and affecting the water supply of the water supply tank; a drain port is set at the bottom of the water supply tank to enable the user to open the drain port switch for drainage when cleaning the clean water tank; a water tank cover is set on the top of the water supply tank to enable the user to conveniently clean the inside of the water supply tank through the water tank cover to prevent internal contamination of the water supply tank from affecting the service life of the vacuum pump.

[0017] The above-mentioned circulating vacuum cooling noise reduction system of the foam molding equipment can be further configured as follows: the drainage pump assembly includes a drainage pump and a drainage pipe connected to the condensation drain outlet and the buffer drain outlet, the output end of the drainage pump is connected to the sewage tank, and the tops of the condensation tank and the buffer tank are provided with a head that can open or close the condensation tank and the buffer tank, and one side of the condensation tank and the buffer tank is provided with an axially arranged ladder, and the corrugated filler is a stainless steel corrugated filler.

[0018] By adopting the above technical scheme, the drainage pump is connected to the condensation drain port and the buffer drain port through a drainage pipe. When the water level in the condensation tank or the buffer tank is too high, the drainage pump cooperates with the condensation drain port and the buffer drain port to quickly drain the water. The condensation tank and the buffer tank can be opened and closed through the head, which is convenient for cleaning the tank and replacing the corrugated packing. By setting a ladder, workers can directly open and close the head through the ladder, which is more convenient to use. The stainless steel corrugated packing has a special puncture structure on the surface, which quickly improves the lubrication performance of the packing, and has the advantages of high efficiency, large flux and low pressure drop, and has small resistance, uniform gas-liquid distribution, high efficiency, large flux and unobvious amplification effect. At the same time, the inclination angle of the corrugated sheet is 30° or 50°, and the adjacent corrugated sheets are in opposite directions. When working in the tower at the same time, the upper and lower two people stack the packing at 90°. This filling method can quickly improve work efficiency, greatly increase the contact area of ​​the gas, and improve the cooling efficiency.

[0019] The above-mentioned foam molding equipment circulating vacuum cooling noise reduction system can be further configured as follows: an air-controlled ball valve is provided on the air intake pipe, an air intake filter is provided on the air intake pipe, and a pressure sensor and a temperature sensor for detecting the air pressure and temperature in the vacuum suction main pipe are provided on the vacuum suction main pipe, and the pressure sensor and the temperature sensor are both electrically connected to the vacuum pump.

[0020] By adopting the above technical scheme, the air-controlled ball valve switch is light and small in size, can be made into a large caliber, has reliable sealing, simple structure, and easy maintenance, so that it can conveniently switch the air intake pipe to achieve vacuum control. By setting an air intake filter, some impurities in the clean water tank can be prevented from entering the vacuum pump and affecting the service life of the vacuum pump. By setting a pressure sensor and a temperature sensor, the air pressure and temperature in the vacuum suction main pipe can be monitored in real time. When the air pressure and temperature in the vacuum suction main pipe are too low or too high, the vacuum pump is linked to work in multiple groups or reduce work to achieve constant temperature and pressure of the vacuum suction main pipe.

[0021] The above-mentioned foam molding equipment circulating vacuum cooling noise reduction system can be further configured as follows: a pressure thermometer is provided in the condensation tank, and the pressure thermometer is electrically connected to the vacuum pump; a water level sensor is provided in the condensation tank, and the water level sensor is electrically connected to the drainage pump assembly.

[0022] By adopting the above technical solution, the pressure thermometer is used to detect the temperature in the condensation tank. When the temperature does not drop for a long time, the vacuum pump increases the vacuum pumping speed to reduce the air pressure in the vacuum chamber, so that the water inlet pipe is quickly sprayed with water. At the same time, the cold energy generated by the vacuum chamber converts the water vapor in the gas into liquid water again, reducing the vacuum pumping time, thereby achieving rapid cooling. By arranging a water level sensor in the condensation tank, when the water level is too high, the liquid in the condensation tank can be quickly discharged through the drainage pump assembly, thereby achieving constant pressure and constant temperature, making the equipment work more stable and energy-saving.

[0023] The above-mentioned circulating vacuum cooling noise reduction system of the foam molding equipment can be further configured as follows: a maintenance platform is provided on one side of the condensation tank and the buffer tank, the maintenance platform is arranged above the noise reduction vacuum pumping device, and a ladder is provided on one side of the maintenance platform.

[0024] By adopting the above technical solution and setting up a maintenance platform, the user can directly maintain the condensing tank and the buffer tank on the maintenance platform, which is more convenient to use.

[0025] The present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the present invention.

[0027] Figure 2 It is a three-dimensional schematic diagram of a high-efficiency condensation and filtration device according to an embodiment of the present invention.

[0028] Figure 3 Schematic diagram of the internal structure of a high-efficiency condensation and filtration device according to an embodiment of the present invention.

[0029] Figure 4 It is a three-dimensional schematic diagram of a noise reduction vacuum pumping device according to an embodiment of the present invention.

[0030] Figure 5 It is a schematic structural diagram of a noise reduction vacuum pumping device according to an embodiment of the present invention.

[0031] Figure 6 It is a three-dimensional schematic diagram of a water supply tank according to an embodiment of the present invention.

[0032] Figure 7 Schematic diagram of the internal structure of the water supply tank according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] like Figure 1-Figure 7As shown, the circulating vacuum cooling noise reduction system of the foam molding equipment includes a high-efficiency condensation filtering device 1, a noise reduction vacuum pumping device 2 and a water circulation box (not shown in the figure), the water circulation box includes a sewage tank and a clean water tank, and a filter plate that is mutually conductive is arranged between the sewage tank and the clean water tank, the high-efficiency condensation filtering device 1 includes a condensation tank 3 and a buffer tank 4, the condensation tank 3 is provided with an air inlet 31 connected to the foam molding equipment at the bottom, and an air outlet 32 ​​connected to the buffer tank 4 at the top, the buffer tank 4 is provided with a buffer port 41 connected to the air outlet 32 ​​at the top, and an air pumping port 42 connected to the noise reduction vacuum pumping device 2 at the bottom, and a vacuum cavity a is formed inside the condensation tank 3 and the buffer tank 4 through the noise reduction vacuum pumping device 2, and the condensation tank 3 is provided with a plurality of Axially stacked corrugated packing 33, the condensing tank 3 fixes the corrugated packing 33 between the air inlet 31 and the air outlet 32 ​​through a packing fixing mechanism, the end of the condensing tank 3 corresponding to the air outlet 32 ​​is provided with a spray mechanism, the spray mechanism includes a spray pipe 5, the spray pipe 5 is provided with a nozzle 51 at one end corresponding to the corrugated packing 33, and the other end extends out of the condensing tank 3 and is provided with a water inlet pipe 52 connected to the clean water tank, the noise reduction vacuum device 2 includes a vacuum suction main pipe 21 connected to the air suction port 42, a plurality of vacuum pumps 6 and a drainage main pipe 22 connected to the vacuum suction main pipe 21, the vacuum pumps 6 are connected to the vacuum suction main pipe 21 through the air inlet pipe 61, and are connected to the drainage main pipe 22 through the exhaust pipe 62, and the water is discharged through the drainage main pipe 22 to the sewage tank, the noise reduction vacuum pumping device 2 also includes a water supply tank 7, the vacuum pumps 6 are all water circulation vacuum pumps, the vacuum pumps 6 are provided with a water inlet 63 and a water outlet 64, the water supply tank 7 is provided with a plurality of water supply pipes 71 connected with the water inlet 63 of the vacuum pump 6, the water supply tank 7 is provided with a water replenishment pipe 72 for supplying water to the water supply tank 7 and connected with the clean water tank, the filler fixing mechanism includes a hollow bottom frame 34 arranged above the corresponding air inlet 31 in the vacuum chamber a and a hollow pressing plate 35 arranged above the corrugated filler 33, the hollow pressing plate 35 is provided with a plurality of pressing plate brackets 36, one end of the pressing plate bracket 36 is against the hollow pressing plate 35, and the other end is against the top of the condensation tank 3, and the spray pipe 5 is provided with a spray nozzle 51 at one end A spray baffle plate 53, the spray baffle plate 53 is a disc-shaped cover arranged above the corrugated filler 33, the spray head 51 is penetrated in the center of the spray baffle plate 53, the pressure plate bracket 36 passes through the spray baffle plate 53 and abuts against the top of the condensation tank 3, a steam-water separator 8 is arranged between the drainage main pipe 22 and the exhaust pipe 62, the bottom of the steam-water separator 8 is connected to the drainage main pipe 22, and a muffler 81 is arranged on the top, the spray mechanism also includes a three-way water pipe 54, one end of the three-way water pipe 54 is provided with a filter 541 connected to the clean water tank, one end is provided with a drain valve 542 connected to the sewage tank, and one end is connected to the water inlet pipe 52, the bottom of the condensation tank 3 is provided with a condensation drain port 37 connected to the sewage tank, and a drainage pump assembly is arranged at the condensation drain port 37,The bottom of the buffer tank 4 is provided with a buffer drain port 43 connected to the sewage tank, and a drainage pump assembly is provided at the buffer drain port 43. A float valve 721 is provided at one end of the water supply pipe 72 corresponding to the water supply pipe 72 in the water supply tank 7, and the switch of the water supply pipe 72 is controlled by the float valve 721. An overflow port 73 is provided above the water supply tank 7, and a drain port 74 connected to the sewage tank is provided at the bottom of the water supply tank 7. A water tank cover 75 is provided on the top of the water supply tank 7. The drainage pump assembly includes a drainage pump 44 and a drainage pipe 45 connected to the condensation drain port 37 and the buffer drain port 43. The output end of the drainage pump 44 is connected to the sewage tank. The tops of the condensation tank 3 and the buffer tank 4 are provided with a head 46 that can open or close the condensation tank 3 and the buffer tank 4. An axially arranged ladder is provided on one side of the condensation tank 3 and the buffer tank 4. 47. The corrugated packing 33 is a stainless steel corrugated packing. The air intake pipe 61 is provided with an air-controlled ball valve 611, and the air intake pipe 61 is provided with an air intake filter 612. The vacuum suction main pipe 21 is provided with a pressure sensor 211 and a temperature sensor 212 for detecting the air pressure and temperature in the vacuum suction main pipe 21. The pressure sensor 211 and the temperature sensor 212 are both electrically connected to the vacuum pump 6. The condensing tank 3 is provided with a pressure thermometer 38, and the pressure thermometer 38 is electrically connected to the vacuum pump 6. The condensing tank 3 is provided with a water level sensor 39, and the water level sensor 39 is electrically connected to the drainage pump assembly. A maintenance platform 9 is provided on one side of the condensing tank 3 and the buffer tank 4. The maintenance platform 9 is arranged above the noise reduction vacuum pumping device 2, and a ladder 91 is provided on one side of the maintenance platform 9.

[0034] When the circulating vacuum cooling noise reduction system of the foam molding equipment of the present invention is in use, the water circulating vacuum pump 6 delivers water to the water inlet 63 along the water supply pipe 71 through the water supply tank 7 as the working fluid, wherein the impeller of the water circulating vacuum pump is eccentrically arranged on the driving shaft, and when the impeller rotates clockwise, the water is thrown around by the impeller, and due to the effect of centrifugal force, the water forms a closed circular ring of approximately equal thickness determined by the shape of the pump chamber, the upper inner surface of the water ring is just tangent to the impeller hub, and the lower inner surface of the water ring is just in contact with the top of the blade, at this time a crescent-shaped space is formed between the impeller hub and the water ring, and this space is divided into a number of small cavities with the same number of blades by the impeller, at this time the high-temperature mixed gas is sucked in and mixed with the water medium in the vacuum pump, and when the suction is finished, the small cavity is isolated from the suction port; when the impeller continues to rotate, the small cavity changes from large to small, so that the gas is compressed;When the small cavity is connected to the exhaust pipe, the soda-water mixture is discharged through the drainage main pipe 22 outside the pump. The whole process uses the water supply tank and the water circulation vacuum pump to replace the original vacuum pump, so that the high-pressure water becomes non-pressurized water, avoiding the vacuum pump blades from being gassed, and forming a vacuum negative pressure environment between the condensation tank 3 and the buffer tank 4. The condensation tank 3 extracts the high-temperature mixed gas in the foam molding equipment to quickly cool and demold the foam, ensuring that there is no air or moisture between the particles, preventing product gaps between particles, and improving the product finish. The extracted high-temperature mixed gas enters the condensation tank 3 from the air inlet 31, and then the buffer tank 4 is set, which buffers the vacuum fluctuation. When the vacuum degree in the buffer tank 4 drops to a certain level, the vacuum pump 6 is started to evacuate the vacuum, thus avoiding starting the water ring vacuum pump to replenish the vacuum main pipe 21 and the vacuum branch pipe when there is a slight fluctuation in the vacuum degree. Therefore, frequent starting of the vacuum pump 6 is avoided, and industrial energy consumption is reduced. The air pressure in the condenser tank 3 enters the buffer tank 4 cache through the buffer port 41. After the high-temperature mixed gas enters the condenser tank 3, the high-temperature mixed gas will pass through the vertically stacked corrugated packing 33, and then the high-temperature mixed gas will be sprayed and cooled by the spray mechanism. Due to the negative pressure vacuum chamber a, the water inlet pipe 52 sends the cooling water in the clean water tank under normal air pressure into the spray pipe 5, and then the high-temperature mixed gas in the corrugated packing 33 is sprayed by the nozzle 51. Spraying is performed to cool down and reduce the vacuum pumping time, thereby achieving rapid cooling and efficient condensation. In the spraying process, harmful substances such as dust and foaming agents will be washed away, and then the sewage will be discharged into the sewage tank through the drainage pump assembly to avoid pollution in the workshop. Part of the steam-water mixture will enter the vacuum suction pipe 21 through the buffer tank 4, and then enter the water circulation vacuum pump 6 along the air inlet pipe 61. The steam-water mixture is then sent to the steam-water separator 8 through the exhaust pipe 62. The impurities of the steam-water mixture are impacted on the inner wall of the steam-water separator 8 through the steam-water separator 8, and the liquid containing impurities (harmful substances such as dust and foaming agents) is discharged along the drainage pipe at the bottom of the steam-water separator 8. , the purified gas floats up and is discharged into the atmosphere after being silenced by the muffler. The whole process uses a water supply tank and a water circulation vacuum pump to replace the original vacuum pump, so that high-pressure water becomes non-pressurized water, avoiding the vacuum pump blades from being gassed and extending the service life of the vacuum pump. At the same time, the extracted mixed gas is purified and discharged into the atmosphere to avoid pollution of the workshop. At the same time, the water circulation box is equipped with a clean water tank and a sewage tank, so that the cooling water in the clean water tank can supply water to the spray mechanism and the water supply tank, and the sewage tank is used to receive the wastewater generated by the circulating vacuum cooling and noise reduction system (drainage pump assembly, water supply tank 7 and drainage main pipe 22) of the foam molding equipment, and it is recycled and reused after filtering to achieve the technical effect of energy saving and environmental protection. ;

Claims

1. A circulating vacuum cooling noise reduction system for foam molding equipment, comprising a high-efficiency condensation filtering device, a noise reduction vacuum pumping device and a water circulation box, wherein the water circulation box comprises a sewage tank and a clean water tank, wherein a filter plate communicating with each other is arranged between the sewage tank and the clean water tank, wherein the high-efficiency condensation filtering device comprises a condensation tank and a buffer tank, wherein an air inlet connected to the foam molding equipment is arranged at the bottom of the condensation tank, and an air outlet connected to the buffer tank is arranged at the top, wherein a buffer port connected to the air outlet is arranged at the top of the buffer tank, and an air pumping port connected to the noise reduction vacuum pumping device is arranged at the bottom, and a vacuum cavity is formed between the condensation tank and the buffer tank through the noise reduction vacuum pumping device, wherein a plurality of axially stacked corrugated fillers are arranged in the condensation tank, and the condensation tank is fixed by a filler fixing mechanism The corrugated filler is fixed between the air inlet and the air outlet, a spray mechanism is provided at one end of the condensing tank corresponding to the air outlet, the spray mechanism includes a spray pipe, a nozzle is provided at one end of the spray pipe corresponding to the corrugated filler, and the other end extending out of the condensing tank is provided with a water inlet pipe connected to the clean water tank, the noise reduction vacuum pumping device includes a vacuum suction pipe connected to the air suction port, a plurality of vacuum pumps and a drainage pipe connected to the vacuum suction pipe, the vacuum pumps are connected to the vacuum suction pipe through the air inlet pipe, connected to the drainage pipe through the exhaust pipe, and the water is discharged into the sewage tank through the drainage pipe, the noise reduction vacuum pumping device also includes a water supply tank, the vacuum pumps are all water circulation vacuum pumps, the vacuum pumps are provided with a water inlet and a water outlet, the water supply The box is provided with a plurality of water supply pipes connected with the water inlet of the vacuum pump, the water supply tank is provided with a water replenishing pipe which supplies water to the water supply tank and is connected with the clean water tank, a steam-water separator is provided between the drain main pipe and the exhaust pipe, the bottom of the steam-water separator is connected with the drain main pipe, and a muffler is provided on the top thereof, the spray mechanism also includes a three-way water pipe, one end of the three-way water pipe is provided with a filter connected with the clean water tank, one end is provided with a drain valve connected with the sewage tank, and one end is connected with the water inlet pipe, the bottom of the condensation tank is provided with a condensation drain connected with the sewage tank, a drainage pump assembly is provided at the condensation drain, the bottom of the buffer tank is provided with a buffer drain connected with the sewage tank, a drainage pump assembly is provided at the buffer drain, and the inside of the water supply tank corresponds to the water replenishing pipe A float valve is provided at one end, and the switch of the water supply pipe is controlled by the float valve. An overflow port is provided above the water supply tank, a drain port connected to the sewage tank is provided at the bottom of the water supply tank, and a water tank cover is provided on the top of the water supply tank. The filler fixing mechanism includes a hollow bottom frame arranged above the corresponding air inlet in the vacuum chamber and a hollow pressure plate arranged above the corrugated filler. A plurality of pressure plate brackets are provided on the hollow pressure plate, one end of the pressure plate bracket is abutted against the hollow pressure plate, and the other end is abutted against the top of the condensation tank. A spray water baffle is provided at one end of the spray pipe corresponding to the nozzle, and the spray water baffle is in a disc shape and is arranged above the corrugated filler. The nozzle is penetrated through the center of the spray water baffle, and the pressure plate bracket passes through the spray water baffle and abuts against the top of the condensation tank.

2. The foam molding equipment circulating vacuum cooling noise reduction system according to claim 1, characterized in that: The drain pump assembly includes a drain pump and a drain pipe connected to a condensation drain outlet and a buffer drain outlet. The output end of the drain pump is connected to a sewage tank. The tops of the condensation tank and the buffer tank are provided with a head that can open or close the condensation tank and the buffer tank. An axially arranged ladder is provided on one side of the condensation tank and the buffer tank. The corrugated filler is a stainless steel corrugated filler.

3. The foam molding equipment circulating vacuum cooling noise reduction system according to claim 2, characterized in that: The air intake pipe is provided with an air-controlled ball valve, the air intake pipe is provided with an air intake filter, the vacuum suction pipe is provided with a pressure sensor and a temperature sensor for detecting the air pressure and temperature in the vacuum suction pipe, and the pressure sensor and the temperature sensor are both electrically connected to the vacuum pump.

4. The foam molding equipment circulating vacuum cooling noise reduction system according to claim 3, characterized in that: A pressure thermometer is arranged in the condensing tank, and the pressure thermometer is electrically connected to the vacuum pump. A water level sensor is arranged in the condensing tank, and the water level sensor is electrically connected to the drainage pump assembly.

5. The foam molding equipment circulating vacuum cooling noise reduction system according to any one of claims 1 to 4, characterized in that: A maintenance platform is provided on one side of the condensation tank and the buffer tank. The maintenance platform is arranged above the noise reduction vacuum pumping device. A ladder is provided on one side of the maintenance platform.

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