CN212603304U - Safe vacuum device suitable for screw extruder - Google Patents
Safe vacuum device suitable for screw extruder Download PDFInfo
- Publication number
- CN212603304U CN212603304U CN202020191252.8U CN202020191252U CN212603304U CN 212603304 U CN212603304 U CN 212603304U CN 202020191252 U CN202020191252 U CN 202020191252U CN 212603304 U CN212603304 U CN 212603304U
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- China
- Prior art keywords
- vacuum chamber
- vacuum
- net
- screw extruder
- separation net
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000011148 porous material Substances 0.000 claims abstract description 5
- 238000009833 condensation Methods 0.000 claims abstract description 3
- 230000005494 condensation Effects 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims description 27
- 238000000926 separation method Methods 0.000 abstract description 23
- 239000000463 material Substances 0.000 abstract description 14
- 229920003023 plastic Polymers 0.000 description 14
- 239000004033 plastic Substances 0.000 description 14
- 239000007788 liquid Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005086 pumping Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Images
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses a safe vacuum apparatus suitable for screw extruder, include: a vacuum chamber, a condensate tank and a vacuum pump; the condensed water tank is respectively connected with the vacuum pump and the vacuum chamber through a conduit; the vacuum chamber comprises a vacuum chamber body, a first separation net and a second separation net, wherein the vacuum chamber body is a cylinder with an opening at one end, the opening end of the vacuum chamber body is connected with a screw rod cylinder of the screw rod extruder, the first separation net and the second separation net are arranged in the vacuum chamber body, the first separation net is positioned above the second separation net, a conduit connected with the condensation water tank in the vacuum chamber is arranged above the first separation net, the first separation net is funnel-shaped, and the pore of the first separation net is smaller than that of the second separation net; the utility model provides a vacuum pump which can completely block materials and prevent the vacuum pump from being blocked; and the safe vacuum device can fully absorb the steam in the extruder and improve the product quality.
Description
Technical Field
The utility model belongs to the technical field of the plastic products is made and specifically relates to a safe vacuum apparatus suitable for screw extruder is related to.
Background
The screw extruder depends on the pressure and the shearing force generated by the rotation of the screw, so that materials can be fully plasticized and uniformly mixed and are molded through a neck mold. Plastics extruders can be largely classified into twin-screw extruders, single-screw extruders and, less frequently, multi-screw extruders and also screwless extruders.
The vacuum-pumping device plays an important role in the extrusion operation of the plastic extruder, and can be said to be an essential device in some cases. Many plastic raw materials inevitably contain certain water elements when being put into an extruder for production, and the water is a harmful element for most plastic products. When the plastic extruder equipment is in operation, materials can pass through the stage of melting and plasticizing, so heating equipment can be additionally arranged in the screw production stage, and a temperature control system can control the production temperature to be about 200 ℃ (specific problems are determined according to different materials). In this process, the water is heated and evaporated to become a gas, and in order to remove the water vapor, the gas is generally recoiled back into the hopper for discharge or a vent is opened on the cylinder for discharge according to the structure of the extruder. At this time, if the quality requirement of the plastic is not high, the material is polluted by water vapor or the plastic has a certain water content, the simple structure can meet the production requirement, namely, a vacuumizing device is not needed.
Along with the development of the plastic industry, the quality requirement of the plastic products is higher and higher, the requirement of the plastic industry is continuously improved, the competitiveness of the plastic industry is improved, and the installation rate of the vacuum device is higher. If a vacuumizing mode is adopted in the plastication process of the extruder, the moisture and low molecular substances in the materials can be effectively volatilized under the action of vacuum (generally, the water is taken as the main component, and the low molecular substances are determined by the production condition). Compared with the prior equipment, the method is more beneficial to improving the quality and compactness of the product so as to prevent harmful elements from influencing the final appearance and performance of the product. However, most of the prior art evacuation devices will often wash out the material in the extruder by mistake during the evacuation process, which results in material waste on one hand and blockage of the evacuation device on the other hand.
Chinese patent publication No. CN206780969U, a backflow-preventing vacuum-pumping device for a plastic extruder, discloses a backflow-preventing vacuum-pumping device for a plastic extruder; the device comprises a buffer tank connected with an extruder, a collecting tank positioned below the buffer tank, a vacuum tank containing liquid and a vacuum pump, wherein a cooling structure is arranged in the buffer tank, and the buffer tank is provided with a waste liquid pipe communicated with the collecting tank; a vacuum tube is arranged between the buffer tank and the vacuum tank for communication, and one end of the vacuum tube in the vacuum tank extends to a position below the liquid level; the vacuum tank is provided with a vacuum pipe connected with a vacuum pump, a filter screen is arranged between the vacuum pipe and the vacuum pipe, and a clamping structure is arranged between the filter screen and the inner wall of the vacuum tank. The utility model prevents the liquid in the vacuum tank from flowing back to the extruder through the buffer tank arranged between the vacuum tank and the extruder, thereby protecting the safety of the extruder; through the cooling structure in the buffer tank, carry out preliminary cooling to gas, make in the gas heavier impurity sink the holding vessel, improve filterable effect. However, the screen is too simple to achieve a good barrier against the material.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problems, the utility model provides a vacuum-pumping device which can completely block materials and prevent the vacuum-pumping device from being blocked; and the safe vacuum device can fully absorb the steam in the extruder and improve the product quality. This safe vacuum apparatus suitable for screw extruder includes: a vacuum chamber, a condensate tank and a vacuum pump; the condensed water tank is respectively connected with the vacuum pump and the vacuum chamber through a conduit; the utility model discloses a vacuum chamber, including vacuum chamber body, first net, second that separates, vacuum chamber body is one end open-ended barrel, the screw rod barrel of screw extruder is connected to the open end of vacuum chamber body, first separate the net with the second separate the net set up in this is internal in vacuum chamber, first separate the net be located the second separates the net top, vacuum chamber with the pipe that the condensation water pitcher is connected set up in first separate the net top, first separate the net for leaking hopper-shaped, just first separate the net hole and be less than the second separates the net hole.
Through two-layer net filtration that separates to two separate the net density and increase progressively layer by layer, can realize better isolation material, first separate the net for leaking hopper-shaped one side further avoided the material to get into, on the other hand can increase the area of contact that vapor passed, avoid the vapor siltation.
Preferably, the vacuum chamber further comprises a heating device arranged above the vacuum chamber body,
the heating device heats the vacuum chamber body.
The heating device ensures that the water vapor is kept in a gas state, prevents the water vapor from being pre-cooled into water and falling back into the screw cylinder body, and also promotes the water vapor to move upwards in a heating environment, so that the water vapor can be better pumped out by the vacuumizing device.
Preferably, the vacuum chamber further comprises a condensing device, wherein the condensing device is arranged between the vacuum chamber and the guide pipe
The junction of the tubes.
The condensing unit can protect the conduit better and prevent the coking of the conduit by the heating device.
Preferably, the condensing device comprises a condensate pipe and an ice bag.
Preferably, the heating means comprises a heating wire heating tube.
Preferably, the mesh number of the first separation net is 250-320 meshes
Preferably, the mesh number of the second separation net is 100-150 meshes.
The utility model discloses technical scheme is for prior art's beneficial effect:
1. the vacuum device of the utility model designs the vacuum chamber with special structure, which can isolate the material and promote the absorption of water vapor;
2. the utility model discloses a vacuum apparatus adds and establishes heating device and condensing equipment, can promote the absorption of vapor to avoid the pipe to be heated the harm.
Drawings
FIG. 1 is a schematic structural view of a safety hollow device of a screw extruder in an embodiment of the present invention;
FIG. 2 is a schematic view of the detailed structure of the part A of the safety hollow device of the screw extruder in the embodiment of the present invention;
in the drawings: 1. the vacuum chamber comprises a vacuum chamber body, 2, a first separation net, 3, a second separation net, 4, a heating device, 5, a condensing device, 6, a vacuum meter, 7, a guide pipe, 8, a screw rod cylinder, 9, a stop valve, 10, a condensed water tank, 11, a water inlet, 12, a water outlet, 13, a vacuum pump, 14 and a water inlet valve.
The specific implementation mode is as follows:
the present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Referring to fig. 1, a structure diagram of a safety hollow device of a screw extruder is shown, wherein the safety hollow device comprises a vacuum gauge 6, a conduit 7, a screw cylinder 8, a stop valve 9, a condensed water tank 10, a water inlet 11, a water outlet 12, a vacuum pump 13, a water inlet valve 14 and a vacuum chamber; the vacuum chamber is fixed on the screw barrel body, 5 absorbs moisture and low molecular substances in volatile materials in the screw barrel body, the vacuum chamber is connected with a condensed water tank 10 through a conduit 7, the conduit is inserted into water in the condensed water tank 10, and the conduit 7 is connected with a vacuum meter 6 and a stop valve 9; the vacuum pump 13 is connected with the condensed water tank 10 through the conduit 7, the conduit is not inserted into the water in the condensed water tank 10, the water inlet 11 is arranged at the top of the condensed water tank 10, and the water outlet 12 is arranged at the bottom of the condensed water tank 10. In this embodiment, the vacuum pump 13 is a water ring vacuum pump, and the water inlet valve 14 is connected to the vacuum pump 13 through a conduit.
In this embodiment, the conduit 7 has an inner diameter of 1 foot.
Referring to fig. 2, a partial structure diagram of a safety hollow device of a screw extruder is shown, wherein the safety hollow device comprises a vacuum chamber body 1, a first screen 2, a second screen 3, a heating device 4, a condensing device 5, a vacuum gauge 6, a conduit 7 and a screw cylinder 8; the condensed water tank is respectively connected with the vacuum pump and the vacuum chamber through a conduit; the vacuum chamber body 1 is a cylinder with an opening at one end, the opening end of the vacuum chamber body 1 is connected with a screw rod cylinder 8 of a screw extruder, a first separation net 2 and a second separation net 3 are arranged in the vacuum chamber body 1, the first separation net 2 is positioned above the second separation net 3, a conduit 7 for connecting the vacuum chamber body 1 with a condensate water tank is arranged above the first separation net 2, the first separation net 2 is funnel-shaped, and the pores of the first separation net 2 are smaller than those of the second separation net 3; the heating device 4 is arranged above the vacuum chamber body 1, and the heating device 1 heats the vacuum chamber body 1; the condensing device 5 is arranged at the joint of the vacuum chamber body 1 and the conduit 7.
In this embodiment, the condensing device 5 is a condensed water pipe, and the condensed water pipe is wrapped around the outer side of the guide pipe 7.
In this embodiment, the heating device 4 is a heating wire heating pipe, and the heating device heats the heat-conducting liquid in the heating pipe through the heating wire, and the heating device 4 transfers the heat to the vacuum chamber body 1 through heat conduction, so as to ensure the heat of the water vapor in the vacuum chamber body 1.
In this embodiment, the pores of the first separating net 2 are 250-320 meshes; the pores of the second separation net 3 are 100-150 meshes.
The above is only a preferred embodiment of the present invention, and the implementation of the present invention is not limited thereby
Mode for the invention and the scope of protection, it should be understood that the invention is not limited to the details of the description and drawings, which are set forth in the following description.
Claims (7)
1. A safety vacuum device adapted for use with a screw extruder, comprising: a vacuum chamber, a condensate tank and a vacuum pump; the condensed water tank is respectively connected with the vacuum pump and the vacuum chamber through a conduit; the utility model discloses a vacuum chamber, including vacuum chamber body, first net, second that separates, vacuum chamber body is one end open-ended barrel, the screw rod barrel of screw extruder is connected to the open end of vacuum chamber body, first separate the net with the second separate the net set up in this is internal in vacuum chamber, first separate the net be located the second separates the net top, vacuum chamber with the pipe that the condensation water pitcher is connected set up in first separate the net top, first separate the net for leaking hopper-shaped, just first separate the net hole and be less than the second separates the net hole.
2. A safety vacuum device suitable for use in a screw extruder according to claim 1, further comprising a heating device disposed above the vacuum chamber body, the heating device heating the vacuum chamber body.
3. A safety vacuum device suitable for use in a screw extruder according to claim 2, further comprising a condensing device disposed at the junction of the vacuum chamber and the conduit.
4. A safety vacuum device adapted for use in a screw extruder according to claim 3, wherein the condensing means comprises a condensate pipe, an ice bag.
5. A safety vacuum device adapted for use in a screw extruder according to claim 2, wherein the heating device comprises a heating wire heating tube.
6. The safety vacuum device for screw extruder as claimed in claim 1, wherein the first screen has a porosity of 250-320 mesh.
7. The safety vacuum device for screw extruder according to claim 1, wherein the second screen has a pore size of 100-150 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020191252.8U CN212603304U (en) | 2020-02-21 | 2020-02-21 | Safe vacuum device suitable for screw extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020191252.8U CN212603304U (en) | 2020-02-21 | 2020-02-21 | Safe vacuum device suitable for screw extruder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212603304U true CN212603304U (en) | 2021-02-26 |
Family
ID=74728687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020191252.8U Expired - Fee Related CN212603304U (en) | 2020-02-21 | 2020-02-21 | Safe vacuum device suitable for screw extruder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212603304U (en) |
-
2020
- 2020-02-21 CN CN202020191252.8U patent/CN212603304U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210226 |