Vacuum system for extruder

Abstract

The vacuum system comprises a vacuum tank, a water ring pump, a water vapor separation box, a water tank and a condenser, the vacuum tank is communicated with a machine barrel of the extruder, the water ring pump is provided with an air inlet, an air outlet, a liquid inlet and a liquid outlet, the air inlet is communicated with the vacuum tank, and the air outlet is communicated with the water vapor separation box; an exhaust pipe for outputting gas is inserted into the top of the water-vapor separation box, the bottom of the water-vapor separation box is communicated with the water tank through a first liquid path pipe, the water tank is communicated with the condenser through a second liquid path pipe, the liquid inlet is communicated with the condenser through a third liquid path pipe, and the liquid outlet is communicated with the water tank through a fourth liquid path pipe; the water ring pump communicates with the water tank and the condenser to form water circulation, and water is saved; and the water-vapor separation device is used for carrying out water-vapor separation on the sucked gas, and the separated water is concentrated into the water tank, so that the waste of water resources is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic product production equipment, in particular to a vacuum system for an extruder. BACKGROUND

[0002] The common vacuum system in the application of extruder is to connect a vacuum tank with a vacuum pump, and the dust-containing gas, condensable gas and gas-water mixture in the extruder are extracted by the operation of the vacuum pump. The current traditional vacuum pump has small power and is not provided with a water vapor separation device, which results in small suction capacity of the vacuum system and cannot meet the working needs of the large output extruder, and the water consumption of the vacuum pump is increased, which does not meet the current production target of high efficiency, energy saving and environmental protection. SUMMARY

[0003] In order to solve the above technical problems, the purpose of the present application is to provide a vacuum system for an extruder.

[0004] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: a vacuum system for an extruder, comprising: a vacuum tank, a water ring pump, a water vapor separation box, a water tank and a condenser, the vacuum tank is in communication with the cylinder of the extruder, the water ring pump has an air inlet, an air outlet, a liquid inlet and a liquid outlet, the air inlet is in communication with the vacuum tank, and the air outlet is in communication with the water vapor separation box; a gas outlet pipe is inserted into the top of the water vapor separation box, the bottom of the water vapor separation box is in communication with the water tank through a first liquid path pipe, the water tank is in communication with the condenser through a second liquid path pipe, the liquid inlet is in communication with the condenser through a third liquid path pipe, and the liquid outlet is in communication with the water tank through a fourth liquid path pipe.

[0005] In the above technical scheme, further preferably, the water ring pump adopts a water ring vacuum pump with a power of 22kW.

[0006] In the above technical scheme, further preferably, two vacuum tanks are arranged side by side, each vacuum tank comprises an inlet and an outlet, the inlets of the two vacuum tanks are in communication with the cylinder at the same time, and the outlets of the two vacuum tanks are in communication with the water ring pump at the same time.

[0007] In the above technical scheme, further preferably, a stainless steel filter element is installed in each vacuum tank, and the stainless steel filter element is located between the inlet and the outlet.

[0008] In the above technical scheme, further preferably, a condensing device, a separation partition and a filter element are installed in the water vapor separation box.

[0009] In the above technical solution, further preferably, the filter is a sponge filter core.

[0010] In the above technical solution, further preferably, the water tank has a liquid supply port communicating with the condenser, and a stainless steel porous plate is installed at the liquid supply port.

[0011] Compared with the prior art, the present application has the following beneficial effects:

[0012] The present application increases the suction amount, the water ring pump is communicated with the water tank and the condenser to form a water circulation, thereby saving water; the water vapor separation device separates water vapor from the suction gas, and concentrates the separated water in the water tank, thereby avoiding waste of water resources. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 A perspective structural schematic diagram of a vacuum system is provided for the embodiment of the present application;

[0014] Figure 2 A front view of the vacuum system in Figure 1 ;

[0015] Figure 3 A top view of the vacuum system in Figure 1 ;

[0016] Figure 4 A principle diagram of the vacuum system in Figure 1 .

[0017] Wherein: 100, vacuum system; 1, vacuum tank; 11, inlet; 12, outlet; 2, water vapor separation box; 3, water tank; 4, condenser; 5, water ring pump; 51, air inlet; 52, air outlet; 53, liquid inlet; 54, liquid outlet; 6, exhaust pipe; 7, first liquid path pipe; 8, gas path pipe; 9, automatic water replenishment valve. DETAILED DESCRIPTION

[0018] To describe the technical content, structural features, purposes and effects of the application in detail, the technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. In the following description, for the purpose of explanation, many specific details are set forth in order to provide a thorough understanding of various exemplary embodiments or implementations of the application. However, various exemplary embodiments can also be implemented without these specific details or in one or more equivalent arrangements. In addition, various exemplary embodiments can be different, but not necessarily exclusive. For example, the specific shape, structure and characteristics of an exemplary embodiment can be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0019] The embodiment of the present application provides a vacuum system for an extruder, which is used for sucking the gas generated in the cylinder of the extruder, reducing the water vapor content of the material in the cylinder, and effectively improving the quality of the final product.

[0020] As shown in Figures 1-3 The vacuum system 100 comprises a vacuum tank 1, a water vapor separation box 2, a water tank 3, a condenser 4 and a water ring pump 5. The water ring pump 5 has an air inlet 51, an air outlet 52, a liquid inlet 53 and a liquid outlet 54. The circulating flowing water is input through the liquid inlet 53 and the liquid outlet 54, and is centrifugally rotated into a centrifugal water ring under the action of a motor. The centrifugal water ring forms a gas suction channel which is in communication with the air inlet 51 and the air outlet 52, thereby realizing the suction function.

[0021] The vacuum system 100 of the embodiment of the present application comprises two vacuum tanks 1 arranged side by side. Each vacuum tank 1 has an inlet 11 and an outlet 12. The inlets 11 of the two vacuum tanks 1 are connected to the cylinder of the extruder through corrugated hoses at the same time. The outlets 12 of the two vacuum tanks 1 are connected to the air inlet 51 of the water ring pump 5 through a gas path pipe 8 at the same time. When the water ring pump 5 works, the suction force generated by the suction channel acts on the two vacuum tanks 1, so that the gas in the cylinder is sucked into the vacuum system.

[0022] A stainless steel filter element (not shown in the figure) is arranged in each vacuum tank 1 and located between the inlet 11 and the outlet 12. The stainless steel filter element is used for filtering the gas sucked from the cylinder, so that impurities contained in the gas do not enter the water ring pump 5 and affect the work of the water ring pump 5. The water ring pump of the present application adopts a water ring vacuum pump with a power of 22kW, which works in cooperation with the two vacuum tanks 1, improves the gas suction capacity of the vacuum system 100, and can provide a more efficient gas suction rate for the extruder with large output.

[0023] As shown in Figures 1-4 The water vapor separation box 2 is arranged on the top of the water ring pump 5 and is connected to the air outlet 52 of the water ring pump 5. The water vapor separation box 2 is used for separating the water vapor from the gas entering through the air inlet 51. An exhaust pipe 6 for outputting the gas separated from the water vapor is arranged on the top of the water vapor separation box 2. The water vapor separation box 2 is internally provided with a condensing device (not shown in the figure), a separation partition (not shown in the figure) and a filter element (not shown in the figure). The filter element is a sponge filter element, which is used for filtering the water vapor entering the water vapor separation box 2. The condensing device is used for cooling the water vapor entering the water vapor separation box 2. The separation partition is used for adsorbing the condensed liquid. The separated gas is output from the exhaust pipe 6 to the vacuum system. The condensed water is deposited at the bottom of the water vapor separation box 2. The bottom of the water vapor separation box 2 is connected to the water tank 3 through a first liquid path pipe 7. The condensed water in the water vapor separation box 2 is transported to the water tank 3 through the first liquid path pipe 7, thereby reducing the water consumption of the water ring pump and saving the water consumption.

[0024] The water tank 3 is connected with the condenser 4 through a second liquid path pipe (not shown in the figure), the condenser 4 is connected with the liquid inlet 53 of the water ring pump 5, the water tank 3 is connected with the liquid outlet 54 of the water ring pump 5, the water ring pump 5, the water tank 3 and the condenser 4 are sequentially connected to form an internal water circulation, the water tank 3 and the condenser 4 work together to continuously deliver cooling water to the water ring pump 5, reduce the temperature of the water ring pump 5, ensure the normal work of the water ring pump 5 and prolong the service life of the water ring pump 5.

[0025] The water tank 3 stores water and can receive water delivered by the water vapor separation box 2 and the water ring pump 5. The water tank 3 supplies water to the condenser 4 through the second liquid path pipe, the condenser 4 cools the water supplied by the water tank 3, and delivers the cooled water to the water ring pump 5 through the pipe from the liquid inlet 53, the cooling water carries away the heat of the water ring pump 5 from the liquid outlet 54, and the cooling of the water ring pump 5 is realized. The water carrying heat is delivered from the liquid outlet 54 to the water tank 3, and is stored and naturally cooled by the water tank 3.

[0026] The water tank 3 has a liquid supply port connected with the condenser 4, and a stainless steel perforated plate (not shown in the figure) is installed at the liquid supply port, which is used to filter the water entering the condenser 4 to avoid damage to the condenser 4 caused by impurities entering the condenser 4 with the water.

[0027] The water tank 3 also has a water supplement port connected with an external water source, and an automatic water supplement valve 9 is arranged at the water supplement port, and a pressure detection device connected with the automatic water supplement valve 9 in the water tank 3, which detects the pressure in the water tank 3 in real time, and controls the automatic water supplement valve 9 to open to supplement water to the water tank 3 when the water in the water tank 3 is insufficient, to ensure stable water supply to the water ring pump 5.

[0028] As shown in Figure 4 The vacuum tank 1, the air inlet 51, the air outlet 52, the water vapor separation box 2 and the exhaust pipe 6 are sequentially connected to form an exhaust passage, and the primary filtration of the vacuum tank 1 and the secondary filtration of the water vapor separation box 2 enable the exhaust pipe 6 to exhaust clean gas. The liquid outlet 54, the water tank 3, the condenser 4 and the liquid inlet 53 are sequentially connected to form an internal water circulation, to realize the circulating water supply to the water ring pump 5 and continuously cool the water ring pump 5.

[0029] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and the scope of protection of the present application is defined by the appended claims, the specification and their equivalents.

Claims

1. A vacuum system for an extruder, characterized in that The utility model relates to a water ring vacuum pump system for extruder, which comprises a vacuum tank, a water ring pump, a water-vapor separation box, a water tank and a condenser. The water ring pump has an air inlet, an air outlet, a liquid inlet and a liquid outlet.

2. The vacuum system of claim 1, wherein, The air inlet is connected to the vacuum tank, and the air outlet is connected to the water-vapor separation box.

3. The vacuum system of claim 1, wherein, The water-vapor separation box is provided with an exhaust pipe at the top for gas output.

4. The vacuum system of claim 3, wherein, The bottom of the water-vapor separation box is connected to the water tank through a first liquid path pipe.

5. The vacuum system of claim 1, wherein, The water tank is connected to the condenser through a second liquid path pipe.

6. The vacuum system of claim 5, wherein, The liquid inlet is connected to the condenser through a third liquid path pipe.

7. The vacuum system of claim 1, wherein, The liquid outlet is connected to the water tank through a fourth liquid path pipe. The water ring pump is a water ring vacuum pump with a power of 22 kW. The utility model relates to a water ring vacuum pump system for extruder, which comprises two vacuum tanks arranged side by side. Each vacuum tank is provided with an inlet and an outlet. The inlets of the two vacuum tanks are connected to the cylinder. The outlets of the two vacuum tanks are connected to the water ring pump. Each vacuum tank is provided with a stainless steel filter element between the inlet and the outlet. The water-vapor separation box is provided with a condensing device, a separation partition and a filter element. The filter element is a sponge filter element. The water tank is provided with a liquid inlet connected to the condenser. The liquid inlet is provided with a stainless steel porous plate.

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