CN211891679U - Anti-blocking device for physical foaming gas injection needle of coaxial cable - Google Patents
Anti-blocking device for physical foaming gas injection needle of coaxial cable Download PDFInfo
- Publication number
- CN211891679U CN211891679U CN202020196313.XU CN202020196313U CN211891679U CN 211891679 U CN211891679 U CN 211891679U CN 202020196313 U CN202020196313 U CN 202020196313U CN 211891679 U CN211891679 U CN 211891679U
- Authority
- CN
- China
- Prior art keywords
- injection needle
- gas injection
- pipe
- coaxial cable
- connecting pipe
- Prior art date
- 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
Links
- 238000002347 injection Methods 0.000 title claims abstract description 55
- 239000007924 injection Substances 0.000 title claims abstract description 55
- 238000005187 foaming Methods 0.000 title claims abstract description 24
- 239000007789 gas Substances 0.000 claims abstract description 54
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 50
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 24
- 239000004088 foaming agent Substances 0.000 claims abstract description 3
- 238000010438 heat treatment Methods 0.000 claims description 4
- 230000004888 barrier function Effects 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 230000006837 decompression Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses a coaxial cable physical foaming gas injection needle anti-blocking device, which comprises a screw rod, a gun barrel, a gas injection needle, a connecting pipe and a through hole, the screw rod is connected with the extruder, the front end of the screw rod is connected with the gun barrel, the foaming agent is mixed with nitrogen in the gun barrel to produce the foaming coaxial cable, one side of the gun barrel is provided with a through hole, one end of a connecting pipe is connected with the through hole, the other end of the connecting pipe is connected with a gas injection needle, the gas injection needle is connected with a nitrogen valve on a nitrogen bottle through a booster pump, a decompression valve in threaded connection is arranged on a needle cylinder of the gas injection needle, the gas injection needle is connected and then fastened on a fixed column through a fixed chain, an external threaded pipe is welded at one end of a connecting pipe and is connected with a through hole, a light pipe is welded at the other end far away from the external threaded pipe, a flange is welded at the tail end of the light pipe, the gas outlet end of the gas injection needle is welded with the flange, and the light pipe is connected with the gas injection needle through the flange. The utility model has reasonable design; the design of the connecting pipe prevents the melted plastic from blocking the air injection needle.
Description
Technical Field
The utility model relates to a coaxial cable physics foaming gas injection needle anti-clogging device.
Background
When the foaming coaxial cable is produced by adopting physical foaming, nitrogen is filled and mixed with foaming plastic materials to generate fine and uniform air holes so as to reduce the increase of signal attenuation caused by the uneven air holes. However, in the actual production, the gas outlet of the gas injection needle for injecting nitrogen is communicated with the barrel of the extruder, and in the actual production process, because the gas hole of the gas injection needle is very small, if the operation of an operator is improper, molten plastic in the barrel is pressed to block the gas hole by the gas injection needle, so that the gas cannot be introduced, and because the aperture of the gas injection needle is very small, the gas injection needle cannot be dredged, only new gas injection needles (5000 yuan per country, 20000 yuan per import) can be purchased, so that the production cost is increased.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a coaxial cable physics foaming gas injection needle anti-clogging device to solve above-mentioned technical problem.
In order to realize the purpose, the utility model adopts the following technical scheme:
the utility model provides a coaxial cable physics foaming gas injection needle anti-clogging device, includes screw rod, barrel, gas injection needle, connecting pipe, through-hole, the screw rod is connected with the extruder, and the front end and the barrel of screw rod are connected, and the foamer produces foaming coaxial cable after mixing with nitrogen gas in the barrel, the through-hole has been seted up to one side of barrel, and the one end and the through-hole of connecting pipe are connected, and the other end and the gas injection needle of connecting pipe are connected, the gas injection needle passes through the booster pump and is connected with the nitrogen gas valve on the nitrogen cylinder, is equipped with threaded connection's relief valve on the cylinder of gas injection needle, and the fixed chain fastens on the fixed column after the gas injection needle is connected, the connecting pipe is the design of type of falling U, and the one end welding of connecting pipe has external screw thread pipe, and external screw thread pipe is connected with the through-hole, and the other end welding of, the light pipe is connected with the gas injection needle through a flange.
Preferably, a plurality of baffle plates are arranged in the external threaded pipe, and the height of each baffle plate is equal to one fourth of the height of the external threaded pipe.
Preferably, both sides of the blocking plate are provided with screw rods in threaded connection, the tail ends of the screw rods are connected with bearings, the bearings are connected with the abutting plates, and the abutting plates are in contact with the inner wall of the external threaded pipe so as to fix the blocking plate.
Preferably, the highest point of the connecting pipe is 5cm higher than the through hole.
Preferably, the anti-blocking device is started according to the sequence that the booster pump is started firstly, then the nitrogen cylinder valve is opened to inject high-pressure nitrogen into the gun barrel, then the temperature control switch of the extruder is opened to reach the specified temperature, then the gun barrel is started, the extruder is stopped firstly when the anti-blocking device is stopped, the screw rod stops rotating, then the heating switch is closed, and after the molten plastic material in the gun barrel is hardened along with the reduction of the temperature, the booster pump is closed, the nitrogen valve is closed, and the power supply of the booster pump is closed.
Compared with the prior art, the utility model has the advantages of it is following: the utility model has reasonable design; the design of the connecting pipe separates the gas injection needle from the gun barrel, so that the gas injection needle is prevented from being blocked by molten plastic, meanwhile, the connecting pipe is in an inverted U-shaped design, the molten plastic is not easy to contact with the gas injection needle under the action of gravity, and the inner wall of the outer threaded pipe is provided with a barrier plate which can intercept the small-flow molten plastic; the method comprises the steps of starting a booster pump before starting the gun barrel, opening a nitrogen bottle valve, injecting high-pressure nitrogen into the gun barrel, opening a temperature control switch of an extruder, starting the gun barrel after reaching a specified temperature, stopping the extruder to stop rotating a screw rod, closing a heating switch, after the molten plastic in the gun barrel is hardened along with the reduction of the temperature, closing the booster pump, closing a nitrogen valve, and closing a power supply of the booster pump, wherein in the operation sequence, the molten plastic with certain fluidity cannot flow back into the needle hole.
Drawings
Fig. 1 is a schematic view of the anti-clogging device for the physical foaming gas injection needle of the coaxial cable of the present invention.
Fig. 2 is the gas injection needle schematic diagram of the coaxial cable physical foaming gas injection needle anti-clogging device of the present invention.
Fig. 3 is a schematic view of the connection pipe of the coaxial cable physical foaming gas injection needle anti-clogging device of the present invention.
Fig. 4 is a schematic view of the external thread pipe of the coaxial cable physical foaming gas injection needle anti-clogging device of the present invention.
Fig. 5 is a schematic diagram of the blocking plate of the coaxial cable physical foaming gas injection needle anti-blocking device of the present invention.
Detailed Description
The invention is explained in further detail below with reference to the figures and the embodiments.
As shown in fig. 1-5, a device for preventing blockage of a physical foaming gas injection needle of a coaxial cable comprises a screw rod 1, a barrel 2, a gas injection needle 3, a connecting pipe 4 and a through hole 5, wherein the screw rod 1 is connected with an extruder, the front end of the screw rod 1 is connected with the barrel 2, a foaming agent is mixed with nitrogen in the barrel 2 to produce the foaming coaxial cable, the through hole 5 is arranged on one side of the barrel 2, one end of the connecting pipe 4 is connected with the through hole 5, the other end of the connecting pipe 4 is connected with the gas injection needle 3, the gas injection needle 3 is connected with a nitrogen valve on a nitrogen bottle through a booster pump, a decompression valve 6 in threaded connection is arranged on a needle cylinder of the gas injection needle 3, a fixed chain 7 is used for connecting and fastening the gas injection needle 3 on a fixed column, the connecting pipe 4 is in an inverted U-shaped design, an external threaded pipe 9 is welded at one end of the connecting pipe 4, the external threaded pipe 9 is connected, the end of the light pipe 8 is welded with a flange, the air outlet end of the air injection needle 3 is welded with the flange, the light pipe 8 is connected with the air injection needle 3 through the flange, a plurality of baffle plates 10 are installed in the external thread pipe 9, the height of the baffle plates 10 is equal to the height of a quarter of the external thread pipe 9, screw rods 11 in threaded connection are arranged on two sides of each baffle plate 10, the tail ends of the screw rods 11 are connected with bearings, the bearings are connected with abutting plates 12, the abutting plates 12 are in contact with the inner wall of the external thread pipe 9 to fix the baffle plates 10, the highest point of each connecting pipe 4 is 5cm higher than that of each through hole 5, the anti-blocking device is started when the gun barrel is started, then a nitrogen bottle valve is opened to inject high-pressure nitrogen into the gun barrel 2, then the temperature control switch of the extruder is opened to reach a specified temperature, the extruder is stopped when the gun is stopped, the screw rod 1 stops rotating and then a heating switch is closed, and after plastic materials melted in the gun barrel 2, then the booster pump, the nitrogen valve and the power supply of the booster pump are closed in sequence.
The foregoing is a preferred embodiment of the present invention, and for those skilled in the art to understand the teaching of the present invention, the changes, modifications, replacements and variations to the embodiments will still fall within the protection scope of the present invention without departing from the principle and spirit of the present invention.
Claims (5)
1. A coaxial cable physical foaming gas injection needle anti-blocking device comprises a screw rod (1), a barrel (2), a gas injection needle (3), a connecting pipe (4) and a through hole (5), and is characterized in that the screw rod (1) is connected with an extruder, the front end of the screw rod (1) is connected with the barrel (2), a foaming agent is mixed with nitrogen in the barrel (2) to produce a foaming coaxial cable, one side of the barrel (2) is provided with the through hole (5), one end of the connecting pipe (4) is connected with the through hole (5), the other end of the connecting pipe (4) is connected with the gas injection needle (3), the gas injection needle (3) is connected with a nitrogen valve on a nitrogen bottle through a booster pump, a pressure release valve (6) in threaded connection is arranged on a needle cylinder of the gas injection needle (3), the gas injection needle (3) is connected and then fastened on a fixed column through a fixed chain (7), and the connecting pipe (4) is designed in an inverted U shape, an external threaded pipe (9) is welded at one end of the connecting pipe (4), the external threaded pipe (9) is connected with the through hole (5), a light pipe (8) is welded at the other end far away from the external threaded pipe (9), a flange is welded at the tail end of the light pipe (8), the air outlet end of the air injection needle (3) is welded with the flange, and the light pipe (8) is connected with the air injection needle (3) through the flange.
2. The physical foaming gas injection needle anti-clogging device for coaxial cable as claimed in claim 1, wherein a plurality of baffle plates (10) are installed inside the external threaded tube (9), and the height of the baffle plates (10) is equal to a quarter of the height of the external threaded tube (9).
3. The physical foaming gas injection needle anti-clogging device for coaxial cable as claimed in claim 2, wherein the barrier plate (10) is provided with a screw rod (11) at both sides thereof, the end of the screw rod (11) is connected with a bearing, the bearing is connected with an abutting plate (12), and the abutting plate (12) is in contact with the inner wall of the external threaded pipe (9) to fix the barrier plate (10).
4. The physical foaming gas injection needle anti-clogging device of coaxial cable as claimed in claim 1, wherein the highest point of the connecting tube (4) is 5cm higher than the through hole (5).
5. The coaxial cable physical foaming gas injection needle anti-blocking device as claimed in claim 1, wherein the anti-blocking device is started according to a sequence of starting a booster pump, opening a nitrogen cylinder valve to inject high-pressure nitrogen into a barrel (2), opening an extruder temperature control switch to reach a specified temperature, and then starting the device, and is stopped according to a sequence of stopping the extruder to stop a screw (1) and then closing a heating switch, and after the molten plastic in the barrel (2) hardens along with the reduction of the temperature, closing the booster pump, closing the nitrogen valve and closing a power supply of the booster pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020196313.XU CN211891679U (en) | 2020-02-24 | 2020-02-24 | Anti-blocking device for physical foaming gas injection needle of coaxial cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020196313.XU CN211891679U (en) | 2020-02-24 | 2020-02-24 | Anti-blocking device for physical foaming gas injection needle of coaxial cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211891679U true CN211891679U (en) | 2020-11-10 |
Family
ID=73291118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020196313.XU Expired - Fee Related CN211891679U (en) | 2020-02-24 | 2020-02-24 | Anti-blocking device for physical foaming gas injection needle of coaxial cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211891679U (en) |
-
2020
- 2020-02-24 CN CN202020196313.XU patent/CN211891679U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201110 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |