CN213137718U - Backwashing device for plastic extrusion filter screen - Google Patents
Backwashing device for plastic extrusion filter screen Download PDFInfo
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- CN213137718U CN213137718U CN202022118493.2U CN202022118493U CN213137718U CN 213137718 U CN213137718 U CN 213137718U CN 202022118493 U CN202022118493 U CN 202022118493U CN 213137718 U CN213137718 U CN 213137718U
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- reversing valve
- material pipe
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Abstract
The invention relates to a backwashing device for a plastic extrusion filter screen, which effectively solves the problems that impurities are easy to remain on the back of the filter screen due to backwashing of the filter screen of an extruder and the working efficiency is low; the technical scheme includes that the filter cavity is internally provided with a first filter cylinder and a second filter cylinder, the first filter cylinder is connected with a first material pipe, the second filter cylinder is connected with a second material pipe, the filter cavity is provided with a material inlet pipe, a material outlet pipe and a slag discharge pipe, a reversing valve is arranged in the filter cavity, the material inlet pipe and the first material pipe are communicated when the reversing valve is positioned at a first station, the slag discharge pipe and the second material pipe are communicated when the reversing valve is positioned at a second station, the first material pipe and the slag discharge pipe are communicated when the reversing valve is positioned at the second station, and the material inlet pipe and the second material pipe are communicated through a second channel; the utility model discloses can enough realize straining the back flush of taking a section of thick bamboo not shutting down, can avoid traditional back flush time simultaneously again and remain impurity at the back of filter screen, improve work efficiency and filter effect effectively.
Description
Technical Field
The utility model relates to an extruder filter element field specifically is a back washing unit of filter screen is extruded to plastics.
Background
The extruder is a common device in the production of plastic products and is used for extruding and molding the melted plastic; install the filter screen in the extruder and filter the material, after using a period, the filter screen can block up, need carry out the back flush, and at back flush in-process, the back flush rivers can remain impurity at the filter screen back, sneak into impurity in the material after making normal filtration, and most extruders need shut down the back flush, influence work efficiency.
Disclosure of Invention
To the above-mentioned condition, for overcoming prior art's defect, the utility model provides a back washing unit of filter screen is extruded to plastics, the effectual extruder filter screen recoil of having solved remains impurity and the problem that work efficiency is low at the filter screen back easily.
The technical scheme includes that the backwashing device for the plastic extrusion filter screen comprises a filter cavity, the filter cavity is of a sealed shell-shaped structure, a first filter cylinder and a second filter cylinder are installed in the filter cavity, a first material pipe communicated with the interior of the first filter cylinder is connected to the first filter cylinder, a second material pipe communicated with the interior of the second filter cylinder is connected to the second filter cylinder, a feeding pipe, a discharging pipe and a deslagging pipe are installed on the filter cavity, a duplex ball valve is installed on the discharging pipe and the deslagging pipe, the discharging pipe and the deslagging pipe are enabled to be opened at the same time, a reversing valve is installed in the filter cavity, a first channel and a second channel are formed in the reversing valve, the reversing valve is provided with two stations, when the reversing valve is located at the first station, the first channel connects the feeding pipe with the first material pipe, the second channel connects the deslagging pipe with the second material pipe, when the reversing valve is positioned at the second station, the first channel connects the first material pipe with the slag discharge pipe, and the second channel connects the feeding pipe with the second material pipe.
The utility model discloses can enough realize straining the back flush of taking a section of thick bamboo not shutting down, can avoid traditional back flush time simultaneously again and remain impurity at the back of filter screen, improve work efficiency and filter effect effectively.
Drawings
Fig. 1 is the first main sectional view of straining when straining a section of thick bamboo of the utility model and filtering, the switching-over valve is in first station in the picture, and the scum pipe is closed, and the discharging pipe is opened.
Fig. 2 is a front sectional view of the first filter cartridge during backflushing according to the present invention, wherein the reversing valve is located at the second station, the deslagging pipe is opened, and the discharging pipe is closed.
Fig. 3 is a front sectional view of the second filter cartridge of the present invention when backflushing, wherein the reversing valve is at the second station, the deslagging pipe is closed, and the discharging pipe is opened.
Fig. 4 is a front cross-sectional view of the second filter cartridge of the present invention during backflushing, wherein the reversing valve is at the first station, the slag discharge pipe is opened, and the discharge pipe is closed.
Fig. 5 is a side view of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
As shown in fig. 1 to 5, the utility model comprises a filter chamber 1, the filter chamber 1 is a sealed shell structure, a first filter cylinder 2 and a second filter cylinder 3 are installed in the filter chamber 1, the first filter cylinder 2 is connected with a first material pipe 4 communicated with the inside of the first filter cylinder, the second filter cylinder 3 is connected with a second material pipe 5 communicated with the inside of the second filter cylinder, a feeding pipe 6, a discharging pipe 7 and a slag discharging pipe 8 are installed on the filter chamber 1, a duplex ball valve 9 is installed on the discharging pipe 7 and the slag discharging pipe 8, the duplex ball valve 9 enables the discharging pipe 7 and the slag discharging pipe 8 to be opened at the same time and only one is opened, a reversing valve 10 is installed in the filter chamber 1, a first passage 11 and a second passage 12 are opened in the reversing valve 10, the reversing valve 10 has two stations, when the reversing valve 10 is located at the first station, the first passage 11 connects the feeding pipe 6 with the first material pipe 4, the second channel 12 connects the slag discharge pipe 8 with the second material pipe 5, when the reversing valve 10 is in the second working position, the first channel 11 connects the first material pipe 4 with the slag discharge pipe 8, and the second channel 12 connects the feeding pipe 6 with the second material pipe 5.
The first material pipe 4 is provided with a first pressure gauge 13 for detecting the pressure in the first material pipe 4, the second material pipe 5 is provided with a second pressure gauge 14 for detecting the pressure in the second material pipe 5, and the filter chamber 1 is internally provided with a third pressure gauge 15 for detecting the pressure in the filter chamber 1.
The reversing valve 10 is connected with a knob 17 positioned outside the filter cavity 1 through a fixing rod 16, and the reversing valve 10 can be rotated to change stations through the knob 17.
And a sealing ring is arranged between the fixing rod 16 and the side wall of the filter cavity 1.
When the utility model starts to work, the reversing valve 10 is at the first station, the duplex ball valve 9 is in the state that the slag discharge pipe 8 is closed and the discharge pipe 7 is opened, at the moment, materials enter the first filter cylinder 2 through the first channel 11 and the first material pipe 4 after being input from the feed pipe 6, and then enter the filter cavity 1 through the side wall of the first filter cylinder 2 and are discharged from the discharge pipe 7; when the pressure difference between the first pressure gauge 13 and the third pressure gauge 15 is increased to a set value, the pressure difference between the inside and the outside of the first filter cylinder 2 is increased, the first filter cylinder 2 is seriously blocked, at the moment, the reversing valve 10 is rotated to a second station through the knob 17, then the duplex ball valve 9 is rotated to a state that the slag discharge pipe 8 is opened, and the discharge pipe 7 is closed, at the moment, materials are input from the feed pipe 6 to enter the second feed cylinder through the second channel 12 and the second feed pipe 5, then flow into the filter cavity 1 from the side wall of the second feed cylinder, flow into the first filter cylinder 2 from the filter cavity 1 through the side wall of the first filter cylinder 2, and finally are discharged through the first feed pipe 4, the first channel 11 and the slag discharge pipe 8, the first filter cylinder 2 is backwashed, and the materials for backwashing are filtered by the second filter cylinder 3, so that impurities cannot be left outside the first filter cylinder 2; after backwashing for a period of time, when the pressure difference between the third pressure gauge 15 and the first pressure gauge 13 is reduced to be normal and vertical, the backwashing of the second filter cylinder 3 is completed, at the moment, the duplex ball valve 9 is rotated to a state that the slag discharge pipe 8 is closed and the discharge pipe 7 is opened, and the material filtered by the second filter cylinder 3 is discharged from the discharge pipe 7; when the pressure difference between a second pressure gauge 14 and a third pressure gauge 15 is increased to a set value, the second filter cylinder 3 is indicated to be seriously blocked, at the moment, a reversing valve 10 is rotated to a first station, then a duplex ball valve 9 is rotated until a deslagging pipe 8 is closed, a discharge pipe 7 is opened and rotated, at the moment, materials are input from a feed pipe 6, enter a first filter cylinder 2 through a first channel 11 and a first material pipe 4, then enter a filter cavity 1 through the side wall of the first filter cylinder 2, then enter the second filter cylinder 3 through the side wall of the second filter cylinder 3, and finally are discharged through a second material pipe 5, a second channel 12 and the deslagging pipe 8, and the second filter cylinder 3 is backwashed; when the pressure difference between the third pressure gauge 15 and the second pressure gauge 14 is reduced to be within a normal range, the duplex ball valve 9 is rotated to close the deslagging pipe 8, the discharging pipe 7 is opened, and the material filtered by the first filter cylinder 2 is discharged from the discharging pipe 7; the process is repeated when the occlusion occurs again.
The utility model discloses can enough realize straining the back flush of taking a section of thick bamboo not shutting down, can avoid traditional back flush time simultaneously again and remain impurity at the back of filter screen, mix into impurity in the material after making normal filtration, improve work efficiency and filter effect effectively.
Claims (4)
1. A back washing device for a plastic extrusion filter screen comprises a filter cavity (1) and is characterized in that the filter cavity (1) is of a sealed shell-shaped structure, a first filter cylinder (2) and a second filter cylinder (3) are installed in the filter cavity (1), a first material pipe (4) communicated with the interior of the first filter cylinder is connected onto the first filter cylinder (2), a second material pipe (5) communicated with the interior of the second filter cylinder is connected onto the second filter cylinder (3), a feeding pipe (6), a discharging pipe (7) and a slag discharge pipe (8) are installed on the filter cavity (1), a duplex ball valve (9) is installed on the discharging pipe (7) and the slag discharge pipe (8), the duplex ball valve (9) enables the discharging pipe (7) and the slag discharge pipe (8) to be opened at the same time and only one is opened, a reversing valve (10) is installed in the filter cavity (1), and a first channel (11) and a second channel (12) are formed in the reversing valve (10), the reversing valve (10) is provided with two stations, when the reversing valve (10) is located at the first station, the first channel (11) connects the feeding pipe (6) with the first material pipe (4), the second channel (12) connects the slag discharging pipe (8) with the second material pipe (5), when the reversing valve (10) is located at the second station, the first channel (11) connects the first material pipe (4) with the slag discharging pipe (8), and the second channel (12) connects the feeding pipe (6) with the second material pipe (5).
2. The backwashing device for the plastic extrusion filter screen according to claim 1, wherein a first pressure gauge (13) is installed on the first material pipe (4) and used for detecting the pressure in the first material pipe (4), a second pressure gauge (14) is installed on the second material pipe (5) and used for detecting the pressure in the second material pipe (5), and a third pressure gauge (15) is installed in the filter cavity (1) and used for detecting the pressure in the filter cavity (1).
3. The backwashing device for the plastic extrusion filter screen as claimed in claim 1, wherein the reversing valve (10) is connected with a knob (17) located outside the filter chamber (1) through a fixing rod (16), and the reversing valve (10) can be rotated to change the working position through the knob (17).
4. The backwashing device for plastic extrusion filter screen of claim 3, wherein a sealing ring is installed between the fixing rod (16) and the side wall of the filter chamber (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022118493.2U CN213137718U (en) | 2020-09-24 | 2020-09-24 | Backwashing device for plastic extrusion filter screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022118493.2U CN213137718U (en) | 2020-09-24 | 2020-09-24 | Backwashing device for plastic extrusion filter screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213137718U true CN213137718U (en) | 2021-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022118493.2U Active CN213137718U (en) | 2020-09-24 | 2020-09-24 | Backwashing device for plastic extrusion filter screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213137718U (en) |
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2020
- 2020-09-24 CN CN202022118493.2U patent/CN213137718U/en active Active
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