CN211050980U

CN211050980U - A essence filtration equipment for turbid wine production

Info

Publication number: CN211050980U
Application number: CN201922030041.6U
Authority: CN
Inventors: 陈传喜
Original assignee: Yichun Chenzongzhuo Distillery Co ltd
Current assignee: Yichun Chenzongzhuo Distillery Co ltd
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-07-21
Anticipated expiration: 2029-11-22

Abstract

The utility model discloses a fine filtration equipment for production of turbid wine, the structure of which comprises a frame, the fine filtration equipment for production of turbid wine of the utility model is characterized in that an auxiliary mechanism and a dehydration device are respectively arranged at the bottoms of the left and right ends of the frame through an opening button, a motor drives a second rotating shaft, so that a first round handle and a second round handle are in rotating fit with the second rotating shaft, and when a first connecting rod and a second connecting rod are driven to rotate, a sliding block slides in a sliding groove, a sliding rod slides in a limiting groove, a pushing plate pushes a filter cake in a filter cake groove to a filter barrel arranged in the dehydration device, then a second wheel is manually rotated clockwise through a rocker to enable a pressure plate to carry out secondary compression on the filter barrel, a wine outlet arranged at the front end of the shell flows out, the filter cake after squeezing can pass through a circular sliding door in the shell, residues in the filter barrel are cleaned, the automatic filter cake cleaning and secondary compression of the filter cake are achieved, and the wine yield is improved.

Description

A essence filtration equipment for turbid wine production

Technical Field

The utility model relates to a fine filtration equipment for turbid wine production belongs to the fine filtration equipment field.

Background

The muddy wine is a Chinese vocabulary, refers to unfiltered wine, wine brewed by glutinous rice, glutinous millet and the like, is relatively muddy, and also refers to wine, namely wine relative to sake, in the existing muddy wine production process, fine filtration equipment is generally used for filtering the muddy wine, a filter press utilizes a special filter medium to apply certain pressure to an object, so that liquid is dialyzed out, the mechanical equipment is common solid-liquid separation equipment, is applied to chemical production in the beginning of 18 th century, and is still widely applied to industries such as chemical industry, pharmacy, metallurgy, dye, food, brewing, ceramics, environmental protection and the like.

Because the existing fine filtration equipment for producing the turbid wine is used for cleaning the compressed filter cake mostly by manpower, and the compressed filter cake can still contain wine liquid, the wine liquid remained in the filter cake can not be well collected, the waste of a large amount of wine liquid is caused, and the wine yield is greatly reduced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an it is not enough to exist to solve prior art because the essence of present muddy wine production is strained equipment, clears up by the manual work mostly to the filter cake that has compressed, and still can remain wine liquid in the middle of the filter cake that has compressed, can not be fine can collect remaining wine liquid in the filter cake, cause the waste of a large amount of wine liquid, and the reduction of very big degree goes out the problem of wine rate.

In order to achieve the above purpose, the present invention is realized by the following technical solution: a fine filtration device for production of turbid wine comprises a frame, an auxiliary mechanism and a dehydration device, wherein a filter cake groove is arranged at the upper left end of the frame, the bottom of the lower left end of the frame is fixed with the auxiliary mechanism, the surface of the upper end of the filter cake groove is tightly attached to the auxiliary mechanism, the bottom of the lower right end of the frame is fixed with the dehydration device through soldering tin, the right end of the filter cake groove is fixed with the dehydration device, the auxiliary mechanism comprises a base, a limiting groove, a sliding rod, a push plate, a sliding block, a first connecting rod, a second connecting rod, a first rotating shaft, a first round handle, a second rotating shaft, a motor, a second round handle and an outer frame, the upper end of the base is fixed with the limiting groove into a whole, the middle part of the right end of the limiting groove is connected with the sliding rod in a sliding manner, the right side of the rear end of the sliding rod is inserted into the push, the utility model discloses a filter cake groove, including first connecting rod, frame, first rotation axis, first connecting rod, second connecting rod, first rotation axis rear end and frame, first connecting rod rear end and first round handle rotate to be connected, second connecting rod upper end and first rotation axis rotate to be connected, first rotation axis rear end is fixed mutually with the frame, first connecting rod rear end rotates with first round handle to be connected, first round handle left side front end and second rotation axis normal running fit, second rotation axis front end rotates with the second round handle to be connected, second rotation axis rear end is fixed mutually with the motor, it is fixed that base bottom and frame pass through soldering tin, frame left side lower extreme bottom is fixed mutually with the frame, filter cake groove upper end surface closely laminates with.

Further, rollers are arranged at four corners of the bottom of the frame, the lower left end of the frame is fixed with a water pumping device through soldering tin, a control panel is arranged at the front right end of the water pumping device, a button is arranged at the front end of the control panel, the left end of the water pumping device is communicated with a liquid pumping pipe, the upper left end of the water pumping device is communicated with a liquid inlet pipe, a power line is arranged at the back of the water pumping device, a water pipe valve is arranged in the middle of the upper end of the liquid inlet pipe, the upper end of the liquid inlet pipe is communicated with an inlet pressure gauge, the upper right end of the liquid inlet pipe is communicated with a thrust plate, the left side of the thrust plate is communicated with a liquid outlet, the upper end of the liquid outlet is communicated with an outlet pressure gauge, the right side of the thrust plate is bonded with the filter plate, the right side of the filter plate is fixed, the utility model discloses a portable electronic device, including pressure strip, motor, button, pumping device, motor, power cord electricity, pressure strip right-hand member middle part and first threaded rod rotate to be connected, first threaded rod right-hand member runs through first limiting plate middle part and fixes integrative with first hand wheel, button, pumping device and motor are connected with the control panel electricity, control panel is connected with the power cord electricity.

Further, the dehydration device comprises a shell, a filter vat, a support, a second limiting plate, a second threaded rod, a pressure plate, a second hand wheel, a rocker, a wine outlet and a baffle plate, wherein the front end and the rear end of the middle part of the shell are fixed with the filter vat, the left side and the right side of the middle part of the front end of the shell are fixed with the support through soldering tin, the rear end of the middle part of the support is fixed with the second limiting plate into a whole, the middle part of the front end of the second limiting plate is connected with the second threaded rod through threads, the rear end of the second threaded rod is fixed with the pressure plate into a whole, the front end of the second threaded rod is fixed with the second hand wheel into a whole, the rocker is arranged at the front end of the second hand wheel, the front end of the shell is communicated with the wine outlet, the left end and the right end of the inner side of the shell are fixed with the baffle, the right end of the filter cake groove is fixed with the shell.

Furthermore, the right upper end of the second round handle is rotatably connected with the second connecting rod, and the right lower end of the second round handle is rotatably connected with the first connecting rod.

Furthermore, a sliding groove with the length of 8cm is formed in the middle of the first connecting rod, and the maximum slidable distance of the sliding block in the sliding groove is 4 cm.

Further, the first connecting rod and the second connecting rod can be at a minimum angle of 110 degrees and at a maximum angle of 145 degrees.

Furthermore, a round sliding door with the radius same as that of the filter barrel is arranged at the fixing position of the back of the filter barrel and the shell.

Further, the sealing rubber sheet is arranged on the inner side of the opening at the front end of the filter barrel and tightly attached to the pressure plate.

Further, the motor employs a Y355 motor.

Further, the shell is made of stainless steel.

The utility model relates to a fine filtration device for producing turbid wine, which is provided with an auxiliary mechanism and a dehydration device respectively, the bottoms of the left end and the right end of a frame are provided with a starting button, so that a motor drives a second rotating shaft, so that when the first round handle and the second round handle are in rotating fit with the second rotating shaft and drive the first connecting rod and the second connecting rod to rotate, the slide block slides in the slide groove, the slide rod slides in the limit groove, so that the filter cake in the filter cake groove is pushed by the push plate to fall into a filter barrel arranged in the dehydration device, then make the pressure disk carry out the secondary compression to the filter vat through the clockwise rotatory second hand wheel of rocker by the manual work, flow by the play wine mouth that the shell front end set up, the filter cake after squeezing can clear up the residue in the filter vat through the inside circular sliding door of shell, has reached automatic clearance filter cake and has carried out the secondary compression to the filter cake, has improved the advantage of wine yield.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the structure of the present invention;

FIG. 3 is a schematic structural view of the auxiliary mechanism of the present invention;

fig. 4 is a schematic view of the auxiliary mechanism of the present invention;

FIG. 5 is a schematic structural view of the dehydration apparatus of the present invention;

fig. 6 is a schematic view of the dewatering device of the present invention.

In the figure: a frame-1, a roller-2, a water pumping device-3, a control panel-4, a button-5, a liquid pumping pipe-6, a liquid inlet pipe-7, an auxiliary mechanism-8, a dewatering device-9, a power line-10, a water pipe valve-11, an inlet pressure gauge-12, a thrust plate-13, an outlet pressure gauge-14, a liquid outlet-15, a filter plate-16, a pressure plate-17, a beam-18, a first threaded rod-19, a first limit plate-20, a first hand wheel-21, a filter cake groove-22, a base-81, a limit groove-82, a slide rod-83, a push plate-84, a slide block-85, a first connecting rod-86, a second connecting rod-87, a first rotating shaft-88, a first round handle-89, a second, A second rotating shaft-810, a motor-811, a second round handle-812, an outer frame-813, a shell-91, a filter barrel-92, a bracket-93, a second limit plate-94, a second threaded rod-95, a pressure plate-96, a second hand wheel-97, a rocker-98, a wine outlet-99 and a clapboard-910.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

Referring to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5 and fig. 6, the present invention provides a fine filtration apparatus for producing wine: the device comprises a frame 1, an auxiliary mechanism 8 and a dewatering device 9, wherein a filter cake groove 22 is arranged at the left upper end of the frame 1, the bottom of the left lower end of the frame 1 is fixed with the auxiliary mechanism 8, the surface of the upper end of the filter cake groove 22 is tightly attached to the auxiliary mechanism 8, the bottom of the right lower end of the frame 1 is fixed with the dewatering device 9 through soldering tin, the right end of the filter cake groove 22 is fixed with the dewatering device 9, the auxiliary mechanism 8 comprises a base 81, a limiting groove 82, a sliding rod 83, a push plate 84, a sliding block 85, a first connecting rod 86, a second connecting rod 87, a first rotating shaft 88, a first round handle 89, a second rotating shaft 810, a motor 811, a second round handle 812 and an outer frame 813, the upper end of the base 81 is fixed with the limiting groove 82 into a whole, so that the limiting groove 82 works more stably, the middle part of the right end of the limiting groove 82 is connected with the, the left rear end of the sliding rod 83 is fixed with the sliding block 85, the rear end of the sliding block 85 is embedded in the middle of the first connecting rod 86, the front side of the upper end of the first connecting rod 86 is rotatably connected with the second connecting rod 87, the upper end of the second connecting rod 87 is rotatably connected with the first rotating shaft 88, the rear end of the first rotating shaft 88 is fixed with the outer frame 813, so that the second connecting rod 87 is better rotatably matched with the first connecting rod 86, the rear end of the first connecting rod 86 is rotatably connected with the first round handle 89, the left front end of the first round handle 89 is rotatably matched with the second rotating shaft 810, the front end of the second rotating shaft 810 is rotatably connected with the second round handle 812, the rear end of the second rotating shaft 810 is fixed with the motor 811, the bottom of the base 81 is fixed with the outer frame 813 through soldering tin, the bottom of the left lower end of the frame 1 is fixed with the outer.

Wherein, the four corners of the bottom of the frame 1 are provided with rollers 2, the left lower end of the frame 1 is fixed with a pumping device 3 through soldering tin, the right front end of the pumping device 3 is provided with a control panel 4, the front end of the control panel 4 is provided with a button 5, the left end of the pumping device 3 is communicated with a liquid pumping pipe 6, the left upper end of the pumping device 3 is communicated with a liquid inlet pipe 7, the back of the pumping device 3 is provided with a power line 10, the middle part of the upper end of the liquid inlet pipe 7 is provided with a water pipe valve 11, the upper end of the liquid inlet pipe 7 is communicated with an inlet pressure gauge 12, the right upper end of the liquid inlet pipe 7 is communicated with a thrust plate 13, the left side of the thrust plate 13 is communicated with a liquid outlet 15, the upper end of the liquid outlet 15 is communicated with an outlet pressure gauge 14, the right side of the thrust plate 13, both sides are fixed through soldering tin with crossbeam 18 around the pressure strip 17 right-hand member, both sides and the 20 sliding connection of first limiting plate around the 18 right-hand member of crossbeam, pressure strip 17 right-hand member middle part is rotated with first threaded rod 19 and is connected, 19 right-hand members of first threaded rod run through first limiting plate 20 middle part and are fixed as an organic whole with first hand wheel 21, and button 5, pumping device 3 and motor 811 are connected with control panel 4 electricity, and control panel 4 is connected with power cord 10 electricity, and the establishment of thrust plate 13 makes the better work that carries on of pressure strip 17.

Wherein, the dehydration device 9 is composed of a shell 91, a filter vat 92, a bracket 93, a second limit plate 94, a second threaded rod 95, a pressure plate 96, a second hand wheel 97, a rocker 98, a wine outlet 99 and a baffle 910, the front and back ends of the middle part of the shell 91 are fixed with the filter vat 92, the left and right sides of the middle part of the front end of the shell 91 are fixed with the bracket 93 through soldering tin, the rear end of the middle part of the bracket 93 is fixed with the second limit plate 94 into a whole, the middle part of the front end of the second limit plate 94 is connected with the second threaded rod 95 through threads, the rear end of the second threaded rod 95 is fixed with the pressure plate 96 into a whole, the front end of the second threaded rod 95 is fixed with the second hand wheel 97 into a whole, the front end of the second hand wheel 97 is provided with the rocker 98, the front end of the shell 91 is connected with the wine outlet 99 in a run-through manner, the left and right ends of the, the bottom of the right lower end of the frame 1 is fixed with the shell 91 through soldering tin, the right end of the filter cake groove 22 is fixed with the shell 91, and the rocker 98 can enable a user to save more labor.

The right upper end of the second round handle 812 is rotatably connected with the second connecting rod 87, the right lower end of the second round handle 812 is rotatably connected with the first connecting rod 86, and the second round handle 812 is positioned in the middle of the second connecting rod 87 and the second round handle 812, so that the second round handle 812 is better in rotating fit.

The middle portion of the first connecting rod 86 is provided with a sliding slot 861 with a length of 8cm, and the maximum slidable distance of the sliding block 85 in the sliding slot 861 is 4cm, so that the sliding block 85 can slide in the sliding slot 861 better.

The first link 86 and the second link 87 can form a minimum angle of 110 degrees and a maximum angle of 145 degrees, and the pushing distance of the sliding rod 83 is limited.

Wherein, a round sliding door with the same radius as that of the filter vat 92 is arranged at the fixed position of the back of the filter vat 92 and the shell 91, so as to be convenient for cleaning the filter cake after the filter vat 92 is internally compressed.

Wherein, filter vat 92 front end opening inboard is provided with sealing rubber piece 921, and sealing rubber piece 921 and pressure disk 96 closely laminate, when having avoided the compression, the inside wine liquid of filter vat 92 condition of leaking.

The motor 811 is a Y355 motor.

Wherein, the housing 91 is made of stainless steel.

This patent import manometer 12, the manometer refers to and uses elastic component as sensing element, the instrument of measurement and instruction higher than ambient pressure, it is very general to use, it almost covers all industrial process and scientific research fields, in fields such as heating power pipe network, oil gas transmission, water supply gas supply system, vehicle maintenance plant shop everywhere visible, especially in industrial process control and technical measurement process, because the elastic sensing element of mechanical manometer has characteristics such as very high mechanical strength and production convenience, make mechanical manometer obtain more and more extensive application.

When a user wants to use the device, the device can be placed in a place needing to be used, then the power cord 10 is firstly connected with the power supply, then the liquid pumping pipe 6 is connected into the raw wine to be filtered, the button 5 on the control panel 4 is opened, so that the raw wine is led into the filter plate 16 through the liquid inlet pipe 7 by the water pumping device 3 for extrusion and filtration, before the raw wine is led into the filter plate, the water pipe valve 11 is opened to enable the liquid inlet pipe 7 to be in a communicated state, in the process of leading the raw wine, the pressure condition when the raw wine is led in can be known by observing the inlet pressure gauge 12 arranged at the upper end of the liquid inlet pipe 7, real-time regulation and control are convenient, when the raw wine is filled into the filter plate 16, the first hand wheel 21 is rotated clockwise manually, the pressing plate 17 compresses the filter plate 16, and the water pipe valve 11 arranged at the left end of the liquid inlet pipe 7 is closed in the compression process, the water pipe valve 11 arranged on the liquid outlet 15 is opened to enable the compressed and filtered wine to flow out from the liquid outlet 15, after the compression is completed, the wine is manually rotated anticlockwise to enable the filter cake in the filter plate 16 to fall into the filter cake groove 22 for storage, meanwhile, the motor 811 can drive the second rotating shaft 810 through the opening button 5, so that the first round handle 89 and the second round handle 812 are in rotating fit with the second rotating shaft 810, and when the first connecting rod 86 and the second connecting rod 87 are driven to rotate, the sliding block 85 slides in the sliding groove 861, the sliding rod 83 slides in the limiting groove 82, the push plate 84 pushes the filter cake in the filter cake groove 22 to fall into the filter barrel 92 arranged inside the dehydration device 9, then the second hand wheel 97 is manually rotated clockwise through the rocker 98 to enable the pressure plate 96 to perform secondary compression on the filter barrel 92, the wine liquid in the compressed filter cake can pass through the filter holes arranged on the surface of the filter barrel 92, the wine outlet 99 arranged at the front end of the shell 91 flows out, the squeezed filter cake can be used for cleaning residues in the filter barrel 92 through the circular sliding door at the rear end of the shell 91, when the filter barrel is not used, all the buttons 5 are closed, and the power supply is disconnected.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A fine filtration device for production of turbid wine comprises a frame (1), wherein a filter cake groove (22) is arranged at the upper left end of the frame (1);

the method is characterized in that: the device is characterized by further comprising an auxiliary mechanism (8) and a dewatering device (9), wherein the bottom of the left lower end of the frame (1) is fixed with the auxiliary mechanism (8), the upper end surface of the filter cake groove (22) is tightly attached to the auxiliary mechanism (8), the bottom of the right lower end of the frame (1) is fixed with the dewatering device (9) through soldering tin, the right end of the filter cake groove (22) is fixed with the dewatering device (9), the auxiliary mechanism (8) is composed of a base (81), a limiting groove (82), a sliding rod (83), a push plate (84), a sliding block (85), a first connecting rod (86), a second connecting rod (87), a first rotating shaft (88), a first round handle (89), a second rotating shaft (810), a motor (811), a second round handle (812) and an outer frame (813), the upper end of the base (81) is fixed with the limiting groove (82) into a whole, and the middle of the right end of the limiting groove (82) is connected with, the right side of the rear end of the sliding rod (83) is connected with the push plate (84) in an inserting mode, the left rear end of the sliding rod (83) is fixed with the sliding block (85), the rear end of the sliding block (85) is embedded into the middle of the first connecting rod (86), the front side of the upper end of the first connecting rod (86) is rotatably connected with the second connecting rod (87), the upper end of the second connecting rod (87) is rotatably connected with the first rotating shaft (88), the rear end of the first rotating shaft (88) is fixed with the outer frame (813), the rear end of the first connecting rod (86) is rotatably connected with the first round handle (89), the left front end of the first round handle (89) is rotatably matched with the second rotating shaft (810), the front end of the second rotating shaft (810) is rotatably connected with the second round handle (812), the rear end of the second rotating shaft (810) is fixed with the motor (811), the bottom of the base (81) is fixed with the outer frame (813) through soldering tin, and the left lower end of the frame (1) is fixed with the outer frame, the upper end surface of the filter cake groove (22) is tightly attached to the push plate (84).

2. A fine filtration apparatus for production of wine as claimed in claim 1, wherein: the frame is characterized in that idler wheels (2) are arranged at four corners of the bottom of the frame (1), the lower left end of the frame (1) is fixed with a water pumping device (3) through soldering tin, a control panel (4) is arranged at the front right end of the water pumping device (3), a button (5) is arranged at the front end of the control panel (4), the left end of the water pumping device (3) is in through connection with a liquid pumping pipe (6), the upper left end of the water pumping device (3) is in through connection with a liquid inlet pipe (7), a power wire (10) is arranged at the back of the water pumping device (3), a water pipe valve (11) is arranged in the middle of the upper end of the liquid inlet pipe (7), the upper end of the liquid inlet pipe (7) is in through connection with an inlet pressure gauge (12), the upper right end of the liquid inlet pipe (7) is in through connection with a thrust plate (13), the left side of the thrust plate (, thrust plate (13) right side and filter plate (16) bond, filter plate (16) right side is fixed mutually with pressure strip (17), both sides are fixed through soldering tin with crossbeam (18) around pressure strip (17) right-hand member, both sides and first limiting plate (20) sliding connection around crossbeam (18) right-hand member, pressure strip (17) right-hand member middle part is rotated with first threaded rod (19) and is connected, first threaded rod (19) right-hand member runs through first limiting plate (20) middle part and is fixed as an organic whole with first hand wheel (21), button (5), pumping device (3) and motor (811) are connected with control panel (4) electricity, control panel (4) are connected with power cord (10) electricity.

3. A fine filtration apparatus for production of wine as claimed in claim 1, wherein: the dehydration device (9) consists of a shell (91), a filter barrel (92), a support (93), a second limiting plate (94), a second threaded rod (95), a pressure plate (96), a second hand wheel (97), a rocker (98), a wine outlet (99) and a partition plate (910), wherein the front end and the rear end of the middle part of the shell (91) are fixed with the filter barrel (92), the left side and the right side of the middle part of the front end of the shell (91) are fixed with the support (93) through soldering tin, the rear end of the middle part of the support (93) is fixed with the second limiting plate (94) into a whole, the middle part of the front end of the second limiting plate (94) is connected with the second threaded rod (95) through threads, the rear end of the second threaded rod (95) is fixed with the pressure plate (96) into a whole, the front end of the second threaded rod (95) is fixed with the second hand wheel (97) into a whole, and the rocker (98, the front end of the shell (91) is in through connection with the wine outlet (99), the left end and the right end of the inner side of the shell (91) are fixed with the partition plate (910), the left side and the right side of the upper end of the filter barrel (92) are fixed with the partition plate (910) into a whole, the bottom of the right lower end of the frame (1) is fixed with the shell (91) through soldering tin, and the right end of the filter cake groove (22) is fixed with the shell (91).

4. A fine filtration apparatus for production of wine as claimed in claim 1, wherein: the right upper end of the second round handle (812) is rotationally connected with the second connecting rod (87), and the right lower end of the second round handle (812) is rotationally connected with the first connecting rod (86).

5. A fine filtration apparatus for production of wine as claimed in claim 1, wherein: the middle part of the first connecting rod (86) is provided with a sliding groove (861) with the length of 8cm, and the maximum slidable distance of the sliding block (85) in the sliding groove (861) is 4 cm.

6. A fine filtration apparatus for production of wine as claimed in claim 1, wherein: the first link (86) and the second link (87) may be at a minimum angle of 110 ° and a maximum angle of 145 °.

7. A fine filtration apparatus for production of wine as claimed in claim 3, wherein: the back of the filter barrel (92) is fixed with the shell (91) and is provided with a circular sliding door with the radius same as that of the filter barrel (92).

8. A fine filtration apparatus for production of wine as claimed in claim 3, wherein: the inner side of the opening at the front end of the filter barrel (92) is provided with a sealing rubber sheet (921), and the sealing rubber sheet (921) is tightly attached to the pressure plate (96).