CN211753386U - Filter cylinder structure, pressure relief filter for chemical tank manufacturing and instrument filter - Google Patents
Filter cylinder structure, pressure relief filter for chemical tank manufacturing and instrument filter Download PDFInfo
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- CN211753386U CN211753386U CN201922335662.5U CN201922335662U CN211753386U CN 211753386 U CN211753386 U CN 211753386U CN 201922335662 U CN201922335662 U CN 201922335662U CN 211753386 U CN211753386 U CN 211753386U
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Abstract
The utility model relates to a filter cartridge structure, a pressure relief filter and an instrument filter for chemical tank making, wherein the filter cartridge structure comprises a tubular filter element, a first end seat and a second end seat which are positioned at the upper end and the lower end of the tubular filter element; the tubular filter element comprises a plurality of longitudinal wedge-shaped filter strips which are circumferentially distributed and a plurality of filter seams which are circumferentially distributed and formed between two adjacent longitudinal wedge-shaped filter strips; the shape of the filtering slits is changed from small to big in a radial transition mode along the filtering direction. The pressure relief filter for the chemical tank comprises an outer cylinder body and an inner filter cylinder; the bottom of the inner filter cylinder is butted with the pressure relief opening, and the side wall of the outer cylinder body is connected with an exhaust pipeline, a safety valve and an instrument assembly through a bypass pipeline. The utility model discloses the characteristics of the applied place and the filter direction of straining a section of thick bamboo are combined, have designed and have passed through gradually to the filtration space of relative wideness by the filtration space of relative narrowness, can the maximize reduce impurity such as particulate matter in the pressure release steam, do benefit to the environmental protection on the one hand, and follow-up equipment has also been protected to on the other hand.
Description
Technical Field
The utility model relates to a filter, especially a strain a section of thick bamboo structure that is used for the system of changing equipment such as boiling, drying to remove dust belongs to filter technical field.
Background
At present, in China, no effective dust removal and recovery device is available in the use of chemical cooking, drying and other equipment, and particularly after chemical cooking for harmless treatment of breeding and slaughtering wastes, pressure relief and drying treatment are needed on chemical tank-making waste steam after high-temperature and high-pressure chemical cooking. The existing pressure relief operation is to discharge pressure relief waste steam into subsequent equipment without any treatment, solid matters such as a large amount of particle floaters carried by the waste steam generated in the tank body can be discharged along with steam or enter the subsequent equipment, and in the pressure relief and drying process, the discharge mode is not only unfavorable for environmental protection, but also can cause the phenomena of wall sticking, wall hanging, blockage and the like of the subsequent equipment. Devices such as instrumentation and safety valves used to monitor pressure relief can cause significant distortion of the monitored data due to wall sticking due to plugging from the large solids content of the exhaust.
Disclosure of Invention
The utility model aims at providing a strain a section of thick bamboo structure to and pressure release and drier-filter based on this section of thick bamboo structure realization of straining. The filter cartridge structure can filter out the pressurized gas, particularly solid substances such as floaters, particles and the like carried by the pressure relief waste gas in the production of the high-temperature high-pressure cooking chemical tank, not only can protect the smoothness of subsequent equipment, but also can increase the yield of chemical or dry materials.
The utility model adopts the technical scheme as follows:
a filter cartridge structure, characterized in that it comprises:
the filter comprises a tubular filter element, a first end seat and a second end seat, wherein the first end seat and the second end seat are positioned at the upper end and the lower end of the tubular filter element;
the tubular filter element comprises a plurality of longitudinal wedge-shaped filter strips which are circumferentially distributed and a plurality of filter seams which are circumferentially distributed and formed between two adjacent longitudinal wedge-shaped filter strips;
the shape of the filtering slits is changed from small to big in a radial transition mode along the filtering direction.
The filter seam is a space structure formed by clamping the sides of two adjacent longitudinal wedge-shaped filter strips, the distance between the two adjacent longitudinal wedge-shaped filter strips is set according to the diameter of particles which can float in a chemical material, and the distance between the filter seams is smaller than the diameter of the floating particles and is generally 0.05mm to 1 mm.
The periphery of the tubular filter element is provided with an annular hoop to fix the inner side longitudinal wedge-shaped filter strip and improve the strength of the filter strip.
The pressure relief filter for the chemical tank is arranged at a pressure relief opening of the chemical tank, and is characterized by comprising an outer cylinder body and an inner filter cylinder nested in the outer cylinder body; the bottom of the inner filter cylinder is butted with the pressure relief opening, and the side wall of the outer cylinder body is connected with an exhaust pipeline, a safety valve and an instrument assembly through a bypass pipeline;
the structure of the inner filter cylinder comprises a tubular filter element, a first end seat and a second end seat, wherein the first end seat and the second end seat are positioned at the upper end and the lower end of the tubular filter element; the tubular filter element comprises a plurality of longitudinal wedge-shaped filter strips which are circumferentially distributed and a plurality of filter seams which are circumferentially distributed and formed between two adjacent longitudinal wedge-shaped filter strips; the shape of the filtering slits is changed from small to big in a radial transition mode along the filtering direction.
The filter seam is formed by clamping the sides of two adjacent longitudinal wedge-shaped filter strips, the distance between the filter seams is set according to the diameter of particles which can float from the chemical material, and the distance is smaller than the diameter of the floating particles and is generally 0.05mm to 1 mm.
The periphery of the tubular filter element is provided with an annular hoop to fix the inner side longitudinal wedge-shaped filter strip and improve the strength of the filter strip.
A lower flange is fixed at the bottom of the outer cylinder body, and the whole pressure relief filter is arranged at a pressure relief opening at the top of the tank body through the lower flange; the top of the outer cylinder body is fixedly provided with an upper flange, the top of the upper flange is connected with a sealing head through a bolt, the sealing head and the lower flange are respectively oppositely and correspondingly provided with annular grooves for fixedly installing the inner filter cylinder, and a first end seat and a second end seat of the inner filter cylinder are respectively embedded into the annular grooves formed in the sealing head and the lower flange, so that the inner filter cylinder is firmly positioned in the outer cylinder body, and waste steam can only be discharged from a hollow filter seam of the inner filter cylinder;
the top of the outer barrel is provided with an observation assembly through a spherical end socket, the observation assembly comprises two sight glass flanges which are connected through bolts and a glass sight glass clamped between the two sight glass flanges, the glass sight glass is matched and sleeved with a built-in scraper controlled by a rotating handle, and the built-in scraper and the rotating handle are connected through a shaft rod penetrating through the middle part of the glass sight glass and are respectively arranged on the inner side and the outer side of the glass sight glass; when the handle is turned by twisting the outer side, the built-in scraper at the inner side is scraped along the inner surface of the glass sight glass so as to clean the adhered matters on the inner surface of the glass sight glass.
The glass sight glass adopts high-pressure-resistant high-temperature-resistant explosion-proof glass with the pressure resistance of more than 10kg and the temperature resistance of more than 200 ℃.
Furthermore, sealing connection is realized between the shaft lever and the glass sight glass through a high-temperature-resistant and corrosion-resistant sealing rubber gasket, a flat washer, a locking nut and a shaft lever O-shaped ring, wherein the high-temperature-resistant and corrosion-resistant sealing rubber gasket is sleeved between the periphery of the shaft lever and an inner hole of the glass sight glass, the two flat washers are respectively installed on the inner side and the outer side of the high-temperature-resistant and corrosion-resistant sealing rubber gasket and the inner side and the outer side of the glass sight glass, the two locking nuts respectively lock the flat washers on the inner side and the outer side of the high-temperature-resistant and corrosion-resistant sealing rubber gasket and the inner side and the outer side of the glass sight glass.
The instrument filter comprises an air inlet pipeline and an instrument assembly arranged on the air inlet pipeline, and is characterized in that a filter cartridge structure is arranged on the air inlet pipeline and at the front end of the air inlet of the instrument assembly, and the filter cartridge structure comprises:
the filter comprises a tubular filter element, a first end seat and a second end seat, wherein the first end seat and the second end seat are positioned at the upper end and the lower end of the tubular filter element;
the tubular filter element comprises a plurality of longitudinal wedge-shaped filter strips which are circumferentially distributed and a plurality of filter seams which are circumferentially distributed and formed between two adjacent longitudinal wedge-shaped filter strips;
the shape of the filtering slits is changed from small to big in a radial transition mode along the filtering direction.
The filter seam is a space structure formed by clamping the sides of two adjacent longitudinal wedge-shaped filter strips, and the minimum distance between the two adjacent longitudinal wedge-shaped filter strips is 0.01mm-1 mm.
The periphery of the tubular filter element is provided with an annular hoop to fix the inner side longitudinal wedge-shaped filter strip and improve the strength of the filter strip.
The utility model discloses a strain a structure, the characteristics of the application place and the filter direction of straining a section of thick bamboo are strained in the combination, designed by the filter space of relative narrow and small gradually to the filter space of relative broadness, when the steam that contains the filtering thing gets into the tubulose filter core, the pressure that produces in the twinkling of an eye makes a large amount of steam collide the filtration seam of filter core, steam is earlier with filtration seam minimum position contact and intercept filtering thing wherein here, later steam is radial towards the outside along with the change trend of filtration seam shape, can not block up the production of filtration seam because of the route is limited completely, this kind of radial spray force can act on the avris of both sides filter element on the contrary and have certain washing clearance effect. The filter cartridge structure is used for filtering pressure relief of a chemical tank, impurities such as particles in pressure relief steam can be reduced to the maximum degree, on one hand, the filter cartridge structure is beneficial to environmental protection, on the other hand, follow-up equipment is protected, and like safety valves and instruments and other equipment, the filter cartridge structure can not cause the phenomena of wall sticking, wall hanging, blocking and the like due to excessive particles in steam, so that the stability and the accuracy of the operation of the follow-up equipment are improved, and the efficient operation of production is finally guaranteed.
Drawings
FIG. 1: the structure of the filter cartridge in the first embodiment is schematic;
FIG. 2: a cross-sectional view of the cartridge;
FIG. 3: the steam moves along the filter seam;
FIG. 4: the second embodiment of the pressure relief filter structure diagram;
FIG. 5: a schematic view of the observation assembly structure;
FIG. 6: the installation structure schematic diagram of the glass sight glass;
FIG. 7: the third embodiment of the instrument filter structure diagram.
Detailed Description
The following description of the embodiments of the present invention will be provided in conjunction with the accompanying drawings for further explaining the specific structural components, design principles and several implementation manners of the present invention.
Example one
The embodiment provides a filter cartridge structure, which is used for steam filtration, the filter cartridge structure is provided with a tubular filter element 10, a first end seat 11 and a second end seat 12 which are positioned at the upper end and the lower end of the tubular filter element 10, and the installation and positioning of the whole filter cartridge and other structural components are realized through the first end seat 11 and the second end seat 12; the tubular filter element 10 comprises a plurality of longitudinal wedge-shaped filter strips 101 which are circumferentially arranged and a plurality of filter slits 102 which are circumferentially arranged and formed between two adjacent longitudinal wedge-shaped filter strips 101; the shape of the filter slits 102 changes in a radial transition from small to large along the filtering direction, and is similar to a trapezoid. The filter slot 102 is a space structure formed by clamping the sides of two adjacent longitudinal wedge-shaped filter strips 101, and the distance between the two adjacent longitudinal wedge-shaped filter strips 101 is set to be 0.05mm according to different filter substances and filter requirements. The periphery of tubulose filter core 10 is equipped with annular staple bolt 13, annular staple bolt 13 and filter strip periphery welded fastening to fixed inboard vertical wedge filter strip 101 and improve its intensity.
The filter cartridge structure of the embodiment combines the characteristics of a steam filtering direction, and designs a filter space which is gradually transited from a relatively narrow filter space to a relatively wide filter space, when steam containing filtered substances enters a tubular filter element, a large amount of steam collides with filter slits of the filter element by pressure generated instantly, the steam is firstly contacted with the minimum position of the filter slits and intercepts the filtered substances therein, and then the steam is radially dispersed outwards along with the change of the shape of the filter slits, so that the filter slits are completely not blocked due to the limited passage, and on the contrary, the radial dispersing force can act on the sides of the filter strips at two sides to have a certain flushing and cleaning effect.
Example two
The embodiment provides a pressure relief filter for a chemical tank, which is arranged at a pressure relief opening of the chemical tank, and comprises an outer cylinder body 20 and an inner filter cylinder 21 nested in the outer cylinder body 20; the bottom of the inner filter cartridge 21 is butted with a pressure relief opening, and the side wall of the outer cylinder 20 is connected with an exhaust pipeline 22, a safety valve 23 and an instrument assembly 24 through a bypass pipeline; the structure of the inner filter cartridge 21 comprises a tubular filter element 10, and a first end seat 11 and a second end seat 12 which are positioned at the upper end and the lower end of the tubular filter element 10; the tubular filter element 10 comprises a plurality of longitudinal wedge-shaped filter strips 101 which are circumferentially arranged and a plurality of filter slits 102 which are circumferentially arranged and formed between two adjacent longitudinal wedge-shaped filter strips 101; the shape of the filter slits 102 changes from small to large in a radial transition manner along the filtering direction. The filter seam 102 is formed by clamping the sides of two adjacent longitudinal wedge-shaped filter strips 101, and the distance between the two adjacent longitudinal wedge-shaped filter strips 101 is 1 mm. The periphery of tubulose filter core 10 is equipped with annular staple bolt 13, annular staple bolt 13 and filter strip periphery welded fastening to fixed inboard vertical wedge filter strip 101 and improve its intensity. A lower flange 201 is fixed at the bottom of the outer cylinder body 20, and the whole pressure relief filter is arranged at a pressure relief opening at the top of the tank body through the lower flange 201; an upper flange 202 is fixed at the top of the outer cylinder 20, a sealing head 203 is connected to the upper part of the upper flange 202 through a bolt, annular grooves for fixedly mounting an inner filter cylinder are correspondingly formed in the sealing head 203 and the lower flange 201 in an opposite manner, and a first end seat 11 and a second end seat 12 of the inner filter cylinder 21 are respectively embedded into the annular grooves formed in the sealing head 203 and the lower flange 201, so that the inner filter cylinder 21 is firmly positioned in the outer cylinder 20; the outer cylinder 20 is provided with an observation assembly 25 at the top thereof through a spherical seal head 204, the observation assembly 25 comprises two sight glass flanges 251 which are connected by bolts and a glass sight glass 252 clamped between the two sight glass flanges 251, the glass sight glass 252 is provided with a built-in scraper 254 controlled by a rotating handle 253, and the built-in scraper 253 and the rotating handle 254 are connected through a shaft rod 255 penetrating through the middle part of the glass sight glass 252 and are respectively arranged at the inner side and the outer side of the glass sight glass 252; when the handle 253 is turned by twisting the outside, the built-in scraper 254 on the inside is scraped along the inner surface of the glass mirror 252 to clean the adhered matter on the inner surface of the glass mirror. The glass sight glass adopts high-pressure-resistant and high-temperature-resistant tempered glass. The shaft lever 255 and the glass sight glass 252 are connected in a sealing mode through a high-temperature-resistant and corrosion-resistant sealing rubber gasket 256, a flat washer 257, a locking nut 258 and a shaft lever O-shaped ring, wherein the high-temperature-resistant and corrosion-resistant sealing rubber gasket 256 is sleeved between the periphery of the shaft lever 255 and an inner hole of the glass sight glass 252, the two flat washers 257 are respectively installed on the inner side and the outer side of the high-temperature-resistant and corrosion-resistant sealing rubber gasket 256 and the inner side and the outer side of the glass sight glass 252, the two locking nuts 258 respectively lock the flat washers 257 on the inner side and the outer side of the high-temperature-resistant and corrosion-resistant sealing rubber gasket 256 and the inner side and the outer side of the glass sight.
The pressure release filter of this embodiment, it filters to combine to strain the cartridge structure in the first embodiment to realize the pressure release, can the maximize reduce solid impurity such as floater and particulate matter in the pressure release steam, the pressure release in-process, a large amount of exhaust steam that contains solid impurity such as floater and particulate matter passes through in the interior filter cartridge that the pressure release mouth got into the filter, solid impurity such as floater and particulate matter is intercepted in straining a section of thick bamboo inboard through interior filter cartridge, the steam of filtering solid impurity passes through the seam and discharges to outer barrel, discharge via the exhaust pipe at last, do benefit to the environmental protection on the one hand, on the other hand has also protected subsequent plant, like equipment such as relief valve and instrument assembly, can not lead to gluing the wall because of excessive particulate matter in the steam, phenomenons such as wall built-up and jam, and then the stability and the precision of subsequent plant operation have been improved.
EXAMPLE III
The present embodiment provides an instrument filter, including an air inlet pipeline 30 and an instrument assembly 31 configured on the air inlet pipeline 30, where the bottom of the instrument assembly 31 is provided with an air inlet passage communicated with the air inlet pipeline 30 and used for different instruments, a filter cartridge structure is installed on the air inlet pipeline 30 and at the front end of the air inlet of the instrument assembly 31, the filter cartridge structure has a tubular filter element 10, and a first end seat 11 and a second end seat 12 located at the upper end and the lower end of the tubular filter element 10, and the installation and positioning of the entire filter cartridge on the air inlet pipeline is realized through the first end seat 11 and the second end seat 12; the tubular filter element 10 comprises a plurality of longitudinal wedge-shaped filter strips 101 which are circumferentially arranged and a plurality of filter slits 102 which are circumferentially arranged and formed between two adjacent longitudinal wedge-shaped filter strips 101; the shape of the filter slits 102 changes in a radial transition from small to large along the filtering direction, and is similar to a trapezoid. The filter slot 102 is a space structure formed by clamping the sides of two adjacent longitudinal wedge-shaped filter strips 101, and the minimum distance between the two adjacent longitudinal wedge-shaped filter strips 101 can be set to be 0.5mm selectively according to different filter substances and filter requirements. The periphery of tubulose filter core 10 is equipped with annular staple bolt 13, annular staple bolt 13 and filter strip periphery welded fastening to fixed inboard vertical wedge filter strip 101 and improve its intensity.
The instrument filter of this embodiment realizes filtering and interception to solid impurity in the gas through straining a section of thick bamboo, effectively avoids the data distortion problem that leads to because of gas impurity blocks up instrument subassembly.
Claims (10)
1. A filter cartridge construction, comprising:
the filter comprises a tubular filter element, a first end seat and a second end seat, wherein the first end seat and the second end seat are positioned at the upper end and the lower end of the tubular filter element;
the tubular filter element comprises a plurality of longitudinal wedge-shaped filter strips which are circumferentially distributed and a plurality of filter seams which are circumferentially distributed and formed between two adjacent longitudinal wedge-shaped filter strips;
the shape of the filtering slits is changed from small to big in a radial transition mode along the filtering direction.
2. A filter cartridge structure as in claim 1 wherein
The filter seam is a space structure formed by clamping the sides of two adjacent longitudinal wedge-shaped filter strips, and the minimum distance between the two adjacent longitudinal wedge-shaped filter strips is 0.05mm-1 mm.
3. A filter cartridge structure as claimed in claim 2, wherein
The periphery of the tubular filter element is provided with an annular hoop to fix the inner side longitudinal wedge-shaped filter strip and improve the strength of the filter strip.
4. The pressure relief filter for the chemical tank is arranged at a pressure relief opening of the chemical tank and is characterized by comprising an outer cylinder body and an inner filter cylinder nested in the outer cylinder body; the bottom of the inner filter cylinder is butted with the pressure relief opening, and the side wall of the outer cylinder body is connected with an exhaust pipeline, a safety valve and an instrument assembly through a bypass pipeline;
the structure of the inner filter cylinder comprises a tubular filter element, a first end seat and a second end seat, wherein the first end seat and the second end seat are positioned at the upper end and the lower end of the tubular filter element; the tubular filter element comprises a plurality of longitudinal wedge-shaped filter strips which are circumferentially distributed and a plurality of filter seams which are circumferentially distributed and formed between two adjacent longitudinal wedge-shaped filter strips; the shape of the filtering slits is changed from small to big in a radial transition mode along the filtering direction.
5. The pressure relief filter for a chemical tank as recited in claim 4, wherein the pressure relief filter comprises a filter body having a first end and a second end, the first end being connected to the filter body and the second end being connected to the filter body
The filter seam is formed by clamping the sides of two adjacent longitudinal wedge-shaped filter strips, and the minimum distance between the two adjacent longitudinal wedge-shaped filter strips is 0.05mm-1 mm;
the periphery of the tubular filter element is provided with an annular hoop to fix the inner side longitudinal wedge-shaped filter strip and improve the strength of the filter strip.
6. The pressure relief filter for a chemical tank as recited in claim 4, wherein the pressure relief filter comprises a filter body having a first end and a second end, the first end being connected to the filter body and the second end being connected to the filter body
A lower flange is fixed at the bottom of the outer cylinder body, and the whole pressure relief filter is arranged at a pressure relief opening at the top of the tank body through the lower flange; the top of the outer cylinder body is fixed with an upper flange, the top of the upper flange is connected with a sealing end socket through a bolt, annular grooves for fixedly mounting the inner filter cylinder are correspondingly formed in the upper flange and the lower flange respectively, and a first end seat and a second end seat of the inner filter cylinder are embedded into the annular grooves formed in the upper flange and the lower flange respectively, so that the inner filter cylinder is firmly positioned in the outer cylinder body.
7. The pressure relief filter for a chemical tank as recited in claim 6, wherein the pressure relief filter comprises a filter body having a first end and a second end, the first end being connected to the filter body and the second end being connected to the filter body
The top of the outer barrel is provided with an observation assembly through a spherical end socket, the observation assembly comprises two sight glass flanges which are connected through bolts and a glass sight glass clamped between the two sight glass flanges, the glass sight glass is matched and sleeved with a built-in scraper controlled by a rotating handle, and the built-in scraper and the rotating handle are connected through a shaft rod penetrating through the middle part of the glass sight glass and are respectively arranged on the inner side and the outer side of the glass sight glass; when the handle is turned by twisting the outer side, the built-in scraper at the inner side is scraped along the inner surface of the glass sight glass so as to clean the adhered matters on the inner surface of the glass sight glass.
8. The pressure relief filter for a chemical tank as recited in claim 7, wherein the pressure relief filter comprises a filter body having a first end and a second end, the first end being connected to the filter body and the second end being connected to the filter body
Sealing connection is realized between axostylus axostyle and the glass sight glass through high temperature resistant corrosion resistant sealed cushion, the plain washer, lock nut and axostylus axostyle O type circle, wherein high temperature resistant corrosion resistant sealed cushion cover is located between axostylus axostyle periphery and the glass sight glass hole, the inside and outside both sides at high temperature resistant corrosion resistant sealed cushion and glass sight glass are installed respectively to two plain washers, two lock nuts lock the plain washer in the inside and outside both sides of high temperature resistant corrosion resistant sealed cushion and glass sight glass respectively, the annular groove of axostylus axostyle O type circle assembly seted up in the middle part of the axostylus axostyle for sealing.
9. The instrument filter comprises an air inlet pipeline and an instrument assembly arranged on the air inlet pipeline, and is characterized in that a filter cartridge structure is arranged on the air inlet pipeline and at the steam inlet front end of the instrument assembly, and the filter cartridge structure comprises:
the filter comprises a tubular filter element, a first end seat and a second end seat, wherein the first end seat and the second end seat are positioned at the upper end and the lower end of the tubular filter element;
the tubular filter element comprises a plurality of longitudinal wedge-shaped filter strips which are circumferentially distributed and a plurality of filter seams which are circumferentially distributed and formed between two adjacent longitudinal wedge-shaped filter strips;
the shape of the filtering slits is changed from small to big in a radial transition mode along the filtering direction.
10. The meter filter of claim 9, wherein the filter is a filter of a ceramic material
The filter seam is a spatial structure formed by clamping the sides of two adjacent longitudinal wedge-shaped filter strips, and the minimum distance between the two adjacent longitudinal wedge-shaped filter strips is 0.05mm-1 mm;
the periphery of the tubular filter element is provided with an annular hoop to fix the inner side longitudinal wedge-shaped filter strip and improve the strength of the filter strip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922335662.5U CN211753386U (en) | 2019-12-24 | 2019-12-24 | Filter cylinder structure, pressure relief filter for chemical tank manufacturing and instrument filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922335662.5U CN211753386U (en) | 2019-12-24 | 2019-12-24 | Filter cylinder structure, pressure relief filter for chemical tank manufacturing and instrument filter |
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| CN211753386U true CN211753386U (en) | 2020-10-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110898562A (en) * | 2019-12-24 | 2020-03-24 | 山东丰获机械制造有限公司 | Filter cartridge structure and pressure relief filter for chemical tank making |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110898562A (en) * | 2019-12-24 | 2020-03-24 | 山东丰获机械制造有限公司 | Filter cartridge structure and pressure relief filter for chemical tank making |
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