CN113513703B - Detachable low-temperature filtering device for liquid hydrogen storage tank, special assembly tool for detachable low-temperature filtering device and use method of detachable low-temperature filtering device - Google Patents
Detachable low-temperature filtering device for liquid hydrogen storage tank, special assembly tool for detachable low-temperature filtering device and use method of detachable low-temperature filtering device Download PDFInfo
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- CN113513703B CN113513703B CN202110768845.5A CN202110768845A CN113513703B CN 113513703 B CN113513703 B CN 113513703B CN 202110768845 A CN202110768845 A CN 202110768845A CN 113513703 B CN113513703 B CN 113513703B
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- filter
- assembly tool
- liquid hydrogen
- fixed sleeve
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- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 53
- 239000001257 hydrogen Substances 0.000 title claims abstract description 53
- 239000007788 liquid Substances 0.000 title claims abstract description 53
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 238000001914 filtration Methods 0.000 title claims abstract description 47
- 238000003860 storage Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000007789 sealing Methods 0.000 claims abstract description 25
- 230000007704 transition Effects 0.000 claims description 22
- 239000010410 layer Substances 0.000 claims description 13
- 238000003780 insertion Methods 0.000 claims description 10
- 230000037431 insertion Effects 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 9
- 239000002356 single layer Substances 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 11
- 238000012423 maintenance Methods 0.000 abstract description 11
- 238000004140 cleaning Methods 0.000 abstract description 9
- 238000003466 welding Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/31—Self-supporting filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
- B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
- B01D29/58—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection arranged concentrically or coaxially
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0341—Filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0388—Arrangement of valves, regulators, filters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/45—Hydrogen technologies in production processes
Abstract
The invention discloses a detachable low-temperature filtering device of a liquid hydrogen storage tank, a special assembly tool thereof and a use method thereof. The filtering device comprises a conveying pipeline at the inlet and the outlet of the liquid hydrogen storage tank, a filter and a fixed sleeve; one end of the fixed sleeve is seamlessly connected with the end face of the conveying pipeline, and the other end of the fixed sleeve is seamlessly connected with the connecting pipe flange; the filter passes through the fixed sleeve and is suspended in the inner cavity of the conveying pipeline, and the head of the filter is detachably positioned and packaged in the fixed sleeve; the device has the characteristics of simple structure, small occupied space, high filtering effect, easiness in cleaning, disassembly and assembly, no risk of liquid hydrogen leakage and the like, and can ensure that the device still has good sealing effect after multiple disassembly and assembly. The special assembly tool comprises an operation handle, an operation rod, a positioning flange and a special pin shaft, wherein a yielding gap is formed in the special pin shaft, and a grabbing hook head is formed at the lower part of the yielding gap; the special assembly tool can rapidly and rapidly finish loading and unloading in a short time, improves the cleaning and maintenance efficiency, and reduces the maintenance cost.
Description
Technical Field
The invention relates to liquid hydrogen fuel storage and transportation equipment, in particular to a detachable low-temperature filtering device of a liquid hydrogen storage tank, and also relates to a special assembly tool and a use method of the filtering device.
Background
The hydrogen is in a liquid state at a low temperature below the condensation point, and the transportation and storage of the liquid hydrogen by the liquid hydrogen storage tank are efficient and economical storage and transportation modes. Liquid hydrogen is used as an environment-friendly clean energy source and is widely applied to important fields of aviation, aerospace and the like, and particularly is used as a main fuel for launch of a carrier rocket. Liquid hydrogen is also a flammable medium, the chemical property of pure liquid hydrogen is relatively stable under the low-temperature environment, and the impure liquid hydrogen is extremely easy to explode. Therefore, liquid hydrogen requires high purity for transportation, storage and use. However, the liquid hydrogen is easy to mix with impurities such as dust and particles in the industrial preparation process, and a low-temperature filtering device is required to be arranged at an inlet and an outlet of the liquid hydrogen storage tank in order to ensure the safety of the liquid hydrogen in the transportation and subsequent use processes.
The traditional low-temperature filtering device generally adopts a valve structure containing a plurality of matched parts, and in order to ensure sealing performance and prevent liquid hydrogen leakage, the valve main body is connected with an inlet and outlet conveying pipeline of a liquid hydrogen storage tank by mainly using part butt welding, threaded sealing rings or flange sealing rings. The following defects exist in the practical application of the structural form: firstly, the valve main body needs to be in sealing connection with the conveying pipeline, and the matching precision requirement of various filtering components in the valve main body is high, so that the valve main body is complex in structure and high in production and processing cost. Secondly, the valve main body is directly welded and connected with the conveying pipeline, so that the cleaning is very difficult, and the valve main body can only be destructively disassembled during maintenance and repair, so that the maintenance period is prolonged, and the maintenance cost is greatly increased; the flange connection or the threaded connection is adopted for convenient disassembly, so that the risk of liquid hydrogen leakage exists, the liquid hydrogen explosion limit range is wide, once leakage is easy to cause continuous explosion, and serious safety accidents are caused. Thirdly, the requirement on purity is extremely high for the safe storage and transportation of liquid hydrogen, various filtering components are required to be frequently disassembled, inspected and maintained to ensure the filtering performance, but the valve main body and various filtering components are difficult to ensure the sealing performance after being disassembled for many times, so that the leakage risk of the liquid hydrogen medium is increased. Fourthly, the valve main body is arranged on the conveying pipeline in series, so that the valve main body occupies a certain operation space, the probability of being touched and damaged in the storage and transportation process is increased due to the external mode, and certain potential safety hazards exist. Fifthly, most of the filtering components in the valve main body are arranged vertically to the axis of the conveying pipeline, the filtering area is limited by the pipe diameter of the pipeline, the filtering efficiency is relatively low, and the requirements of mass high-efficiency storage and transportation of the liquid hydrogen fuel at present cannot be met.
In summary, the existing low-temperature filtering device has the defects of complex structure, difficult cleaning and disassembly, poor tightness, high leakage risk, occupied operation space and the like. In order to solve the above problems, those skilled in the art have been striving to perfect and improve the existing liquid hydrogen cryogenic filtration apparatus, but no satisfactory progress has been made at present.
Disclosure of Invention
The invention aims to provide a detachable low-temperature filtering device of a liquid hydrogen storage tank, which aims to ensure that the detachable low-temperature filtering device is simpler in structure, smaller in occupied space, higher in filtering effect, better in sealing performance, easy to clean and disassemble and assemble, and capable of ensuring that the detachable low-temperature filtering device still has a good sealing effect after being disassembled and assembled for many times and avoiding the risk of liquid hydrogen leakage. The invention also provides a special assembly tool and a use method of the filter device, so that the filter device can be quickly and conveniently assembled and disassembled in a short time, the cleaning and maintenance efficiency is improved, and the maintenance cost is reduced.
In order to achieve the purpose, the invention provides a detachable low-temperature filtering device of a liquid hydrogen storage tank, which comprises a conveying pipeline connected with an inlet and an outlet of the liquid hydrogen storage tank, and is characterized in that: the device also comprises a filter arranged inside the conveying pipeline and a fixed sleeve arranged outside the conveying pipeline; one end of the fixed sleeve is seamlessly connected with the end face of the conveying pipeline, and the other end of the fixed sleeve is seamlessly connected with the connecting pipe flange; the filter passes through the fixed sleeve and is suspended in the inner cavity of the conveying pipeline, and the head of the filter is detachably positioned and packaged in the fixed sleeve.
As a preferable scheme, an internal thread is arranged on the upper part of the inner wall of the fixed sleeve, and an internal bearing platform is arranged on the lower part of the inner wall of the fixed sleeve; the filter is of a cup cylinder structure on the whole and sequentially comprises a head supporting section, a middle filtering section and a tail end socket section; the outer wall of the head support section is provided with an outer flange which is in abutting fit with the inner bearing platform through a sealing gasket, the top of the head support section is provided with an annular pressing plate, and the outer wall threads of the annular pressing plate are in locking fit with the inner threads, so that the head support section is positioned and installed in the fixing sleeve; the middle filtering section and the tail end socket section extend to be suspended into the inner cavity of the conveying pipeline. Therefore, on one hand, the head support section of the filter can be quickly arranged on the inner bearing platform of the fixed sleeve and is locked through the annular pressing plate threads, so that the assembly and the disassembly are extremely convenient; on the other hand, the middle filtering section of the filter is arranged in a coaxial clearance with the conveying pipeline, so that the limitation of the cross section of the pipeline can be avoided, the filtering area is increased by axially prolonging the size, and the filtering efficiency is improved.
Further, an installation ring groove is formed in the root of the end face of the outer flange, and the installation ring groove is used for embedding a sealing gasket. Therefore, the whole filter is only provided with one sealing gasket, the sealing gasket and the filter are integrated into a whole, the structure can be simplified, the installation and the positioning are convenient, and the sealing performance is improved.
Further, the inner wall of the head support section is provided with an annular groove, a plurality of assembly tool insertion holes are formed in the top of the head support section, and the assembly tool insertion holes are semicircular opening through holes which are arranged along the edge of the annular groove and axially extend to the inside of the annular groove. In this way, the filter can be quickly removed through the assembly tool receptacle.
Further, the assembly tool receptacles are evenly arranged with four along the edge of the annular groove. The four assembly tool jacks are arranged at 90 degrees in the circumferential direction, so that the filter can be ensured to be uniformly stressed when being assembled and disassembled, and the workpiece taking is stable and reliable.
Still further, still be provided with the support changeover portion between head supporting section and the intermediate filter segment, the support changeover portion is including connecting conical changeover portion and the cylinder changeover portion as an organic whole, the awl end of conical changeover portion is fixed with the head supporting section and is docked, the bottom of cylinder changeover portion is fixed with the intermediate filter segment and is docked. Therefore, the outer diameter of the conical transition section to the cylindrical transition section is reduced, the structural strength requirement of the filter can be met, and the filter can be conveniently and rapidly installed. Meanwhile, after the outer diameter of the middle filtering section is reduced along with the adaptability of the cylindrical transition section, the gap between the middle filtering section and the inner diameter of the conveying pipeline can be increased, and liquid hydrogen is filtered and circulated.
Further, the middle filter section is mainly formed by combining an outer filter screen, a middle filter screen and an inner filter screen. The outer layer filter screen is composed of a single-layer stainless steel net with the mesh number of 90-120 meshes, the middle layer filter core is composed of a plurality of layers of stainless steel nets with the mesh number of 500-600 meshes, and the inner layer filter screen is formed by rolling a single-layer stainless steel porous sheet with the aperture of 8-12 mm. Adopt three layer construction can guarantee that filter overall structure is stable, and the integrated level is high, and filter effect is good, and the installation is dismantled simply.
Still further, the top of fixed cover is located and has seted up the terminal surface annular between inner wall and the outer wall, the inboard end of terminal surface annular is less than the outside end. Therefore, under the condition of ensuring the structural strength of the fixed sleeve, the manual operation space can be increased, and the filter can be conveniently disassembled and cleaned by using the assembly tool.
Still further, the adapter flange is connected to the blind flange by a flange gasket and a circumferentially disposed bolt assembly to seal the filter in the delivery conduit in the non-operational state.
The invention also designs a special assembly tool for the detachable low-temperature filtering device of the liquid hydrogen storage tank, which comprises an operating rod and is characterized in that: the head part of the operating rod is provided with an operating handle which is arranged vertically with the operating rod, and the tail part of the operating rod is provided with a positioning flange which is arranged vertically with the operating rod; the diameter of the positioning flange is smaller than the diameter of the inner wall of the fixed sleeve, so that the positioning flange can be axially inserted into the fixed sleeve and can be abutted with the top of the head support section; the bottom of the positioning flange is provided with a plurality of special pin shafts, and the special pin shafts are in one-to-one correspondence with the opening positions of the assembly tool jacks, so that the special pin shafts can extend into the annular groove through the assembly tool jacks; the special pin shaft is provided with a relief notch corresponding to the pin body at the upper edge of the annular groove, the pin body at the lower part of the relief notch forms a grabbing hook head, and the grabbing hook head can move in the annular groove to be misplaced and can be abutted with the upper edge of the annular groove through the rotary positioning flange, so that the filter can be conveniently lifted and detached.
Further, the four special pin shafts are uniformly arranged in one-to-one correspondence with the jacks of the assembly tool. The four special pin shafts are also arranged at 90 degrees in the circumferential direction and used for guaranteeing uniform and stable stress when the filter is assembled and disassembled.
The application method of the special assembly tool comprises the following steps: firstly, coaxially aligning an operating rod of a special assembly tool with a head support section of a filter, and axially inserting a positioning flange at the tail of the operating rod into a fixed sleeve; then, the angle of the positioning flange is adjusted, so that the special pin shafts on the positioning flange are aligned with the assembly tool jacks on the head support section one by one and then inserted into the annular groove; then the operation handle is rotated to drive the positioning flange to synchronously rotate, so that the grabbing hook head of the special pin shaft also rotates in the annular groove and is staggered with the corresponding jack of the assembly tool; finally, the filter can be taken out by holding the operating handle and lifting the positioning flange upwards.
More specifically, the rotation angle of the grabbing hook head of the special pin shaft in the annular groove is 10-80 degrees.
The invention has the following advantages: firstly, through the fixed cover that the design has the effect of enclosing and closing the support on liquid hydrogen pipeline, can be with the built-in unsettled fixed in pipeline inner chamber of whole filter, reduced the external volume space that occupies of filter, avoided the external hidden danger that damages that exists of filter. And secondly, the filter is integrally packaged in the conveying pipeline, and even if leakage occurs at the sealing part of the filter and the fixed sleeve, the liquid hydrogen medium is still limited in the conveying pipeline, so that the danger of direct discharge to the atmosphere is avoided. Thirdly, the filter is only detachably connected with the fixed sleeve and is not directly contacted with the conveying pipeline, so that the structure of the filter can be simplified, the filter can be conveniently detached and assembled according to the requirement, the requirements of periodic replacement, maintenance and cleaning of the filter are met, and the filter can be ensured to have good sealing effect after being detached and assembled for many times. Fourth, the filter optimizes and selects the cup-shaped structure, and the filtering surface of the filter corresponds to the inner wall of the conveying pipeline in parallel, so that the filtering area can be effectively increased, and the filtering effect is improved. Fifthly, the special assembly tool is arranged to grasp the filter, so that the disassembly or the assembly can be conveniently completed in a short time, the cleaning and maintenance efficiency of the filter is improved, and the operation cost is reduced.
Drawings
FIG. 1 is a schematic diagram of the structure of a detachable cryogenic filter device for a liquid hydrogen storage tank according to the present invention.
Fig. 2 is a schematic view of the main cross-sectional structure of the filter of fig. 1.
Fig. 3 is an enlarged schematic view of the main sectional structure of the fixing sleeve of fig. 1.
Fig. 4 is a schematic view of a front view of the head support section of fig. 2 in an enlarged configuration.
Fig. 5 is an enlarged schematic top view of the head support section of fig. 4.
Fig. 6 is a schematic view of a front view of the support transition section of fig. 2.
Fig. 7 is an enlarged schematic view of the intermediate filter stage of fig. 2.
Fig. 8 is a schematic main sectional structure of a special assembly tool of the cryogenic filtration apparatus shown in fig. 1.
Fig. 9 is a schematic top view of the positioning flange of fig. 8.
Fig. 10 is an enlarged schematic view of the dedicated pin of fig. 8.
The reference numerals of the components in the drawings are as follows:
a filter 1 comprising:
a head support section 1-1 (wherein, an outer flange 1-1a, a mounting ring groove 1-1b, an annular groove 1-1c, an assembly tool insertion hole 1-1 d);
supporting transition sections 1-2 (wherein, conical transition sections 1-2a, cylindrical transition sections 1-2 b);
an intermediate filter section 1-3 (wherein, an outer filter screen 1-3a, a middle filter core 1-3b, an inner filter screen 1-3 c);
tail end socket section 1-4.
And a sealing gasket 2.
An annular pressure plate 3.
Take over flange 4.
Flange gasket 5.
A bolt assembly 6.
Blind flange 7.
The fixed sleeve 8 (wherein, the internal thread 8-1, the internal bearing platform 8-2 and the end surface ring groove 8-3).
And a delivery conduit 9.
A handle 10.
The lever 11 is operated.
Positioning flange 12.
The pin 13 is specially used (wherein, the notch 13-1 is retracted and the hook head 13-2 is grabbed).
Detailed Description
In order to make the objects, technical solutions and advantageous effects of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments, but the embodiments should not be construed as limiting the present invention.
As shown in fig. 1, the detachable low-temperature filtering device of the liquid hydrogen storage tank described in the embodiment mainly comprises a filter 1, a sealing gasket 2, an annular pressing plate 3, a connecting pipe flange 4, a fixing sleeve 8, a conveying pipeline 9 and other components. One end of the conveying pipeline 9 is connected with an inlet and an outlet (not shown in the figure) of the liquid hydrogen storage tank, the other end of the conveying pipeline 9 is connected with one end of the fixed sleeve 8 in a welding way, and the other end of the fixed sleeve 8 is connected with the connecting pipe flange 4 in a welding way. The filter 1 passes through the fixed sleeve 8 and is suspended in the inner cavity of the conveying pipeline 9, and the head of the filter 1 is abutted in the fixed sleeve 8 through the sealing gasket 2 and is locked with the fixed sleeve 8 through the annular pressing plate 3. The adapter flange 4 is then connected to the blind flange 7 via a flange gasket 5 and a screw assembly 6 arranged in the circumferential direction, so that the filter 1 is sealed in the supply line 9 in the inactive state. When the filtering device needs to enter a working state, the blind flange 7 is detached, and the connecting pipe flange 4 is connected with an external liquid hydrogen supply pipeline.
As shown in fig. 2, the filter 1 is in a cup-barrel structure as a whole, and is composed of a head support section 1-1, a support transition section 1-2, an intermediate filter section 1-3 and a tail end socket section 1-4 in sequence.
As shown in fig. 3, an internal thread 8-1 is provided on the upper portion of the inner wall of the fixed sleeve 8, and an internal bearing platform 8-2 is provided on the lower portion of the inner wall of the fixed sleeve 8; an end surface annular groove 8-3 is formed in the top of the fixing sleeve 8 between the inner wall and the outer wall, and the inner side end of the end surface annular groove 8-3 is lower than the outer side end, so that an operation space convenient for disassembling or assembling the filter 1 is formed.
As shown in fig. 4 to 5, the outer wall of the head support section 1-1 is provided with an outer flange 1-1a, and the root of the end face of the outer flange 1-1a is provided with a mounting ring groove 1-1b; the inner wall of the head support section 1-1 is provided with an annular groove 1-1c, four assembly tool insertion holes 1-1d are formed in the top of the head support section 1-1, and the assembly tool insertion holes 1-1d are semicircular opening through holes which are uniformly distributed along the edge of the annular groove 1-1c and axially extend into the annular groove 1-1 c. As can be seen in combination with fig. 1 to 3: the outer flange 1-1a is in abutting fit with the inner bearing platform 8-2 through a sealing gasket 2, the sealing gasket 2 is embedded in the mounting ring groove 1-1b, and the sealing gasket and the head support section 1-1 are tightly integrated into a whole; the top of the head support section 1-1 is provided with an annular pressing plate 3, and the outer wall threads of the annular pressing plate 3 are in locking fit with the inner threads 8-1, so that the head support section 1-1 is positioned and packaged in the fixing sleeve 8.
As shown in fig. 6 to 7, the support transition section 1-2 is composed of a conical transition section 1-2a and a cylindrical transition section 1-2b which are integrally connected. The middle filter section 1-3 is composed of an outer filter screen 1-3a, a middle filter element 1-3b and an inner filter screen 1-3 c. As can be seen in combination with fig. 1 to 3: the conical bottom of the conical transition section 1-2a is welded with the head support section 1-1, and the bottom of the cylindrical transition section 1-2b is fixedly butted with the middle filter section 1-3. Describing in more detail, the outer layer filter screen 1-3a is composed of a single-layer stainless steel screen with the mesh number of 100 meshes, the upper end of the outer layer filter screen is connected with the cylindrical transition section 1-2b into a whole through iron sheet spot welding, and the lower end of the outer layer filter screen is connected with the outer wall of the elliptical tail end socket section 1-4 into a whole through iron sheet spot welding; the middle filter element 1-3b is formed by overlapping three layers of stainless steel meshes with the mesh number of 500 meshes; the inner filter screen 1-3c is formed by rolling a single-layer stainless steel porous sheet with the aperture of 10mm, the upper end of the inner filter screen is welded with the cylindrical transition section 1-2b into a whole, and the lower end of the inner filter screen is welded with the inner wall of the elliptical tail end seal head section 1-4 into a whole. The support transition section 1-2, the middle filtering section 1-3 and the tail end socket section 1-4 are all arranged in the inner cavity of the conveying pipeline 9 in an extending and suspending mode. The middle filter sections 1-3 and the conveying pipeline 9 are arranged at the same axial center interval, so that the filter area is increased, the liquid hydrogen circulation is facilitated, and the filter efficiency is improved.
As shown in fig. 8 to 10, the special assembly tool for the detachable low-temperature filtering device of the liquid hydrogen storage tank described in the embodiment mainly comprises an operation handle 10, an operation rod 11, a positioning flange 12 and a special pin shaft 13. The operating handle 10 is vertically installed at the head of the operating rod 11, and the positioning flange 12 is vertically installed at the tail of the operating rod 11. The positioning flange 12 has a diameter slightly smaller than the diameter of the inner wall of the fixing sleeve 8 so that it can be inserted axially into the fixing sleeve 8 and can abut against the top of the head support section 1-1. Four special pin shafts 13 are uniformly arranged at the bottom of the positioning flange 12, and the four special pin shafts 13 are in one-to-one correspondence with the opening positions of the four assembly tool jacks 1-1d, so that the four special pin shafts can extend into the annular grooves 1-1c through the assembly tool jacks 1-1 d. The pin body of each special pin shaft 13 corresponding to the upper edge of the annular groove 1-1c is provided with a relief notch 13-1, the pin body at the lower part of the relief notch 13-1 forms a grabbing hook head 13-2, and the grabbing hook head 13-2 can move in the annular groove 1-1c to be misplaced and can be abutted with the upper edge of the annular groove 1-1c by rotating the positioning flange 12 so as to lift and detach the filter 1 upwards.
When the special assembly tool is used, firstly, the operating rod 11 is coaxially aligned with the head support section 1-1 of the filter 1, so that the positioning flange 12 at the tail of the operating rod 11 is axially inserted into the fixed sleeve 8; then slightly adjusting the angle of the positioning flange 12 to enable the special pin shafts 13 on the positioning flange to be aligned with the assembly tool insertion holes 1-1d on the head support section 1-1 one by one and then inserted into the annular grooves 1-1 c; the operation handle 10 is rotated to drive the positioning flange 12 to synchronously rotate, so that the grabbing hook head 13-2 of the special pin shaft 13 rotates in the annular groove 1-1c, the rotation angle is approximately 10-80 degrees, and the positions of the grabbing hook head 13-2 and the corresponding assembly tool insertion hole 1-1d are staggered; finally, the filter 1 can be taken out by holding the operating handle 10 and lifting the positioning flange 12 upwards, and the operation is simple and easy.
In summary, by means of the technical scheme, the liquid hydrogen low-temperature filtering device has the advantages of simpler structure, smaller occupied space, higher filtering effect, better sealing performance, easiness in cleaning and disassembly, good sealing effect after multiple disassembly and assembly, and effective avoidance of liquid hydrogen leakage risk. Meanwhile, the special assembly tool can rapidly and quickly finish loading and unloading in a short time, improve the cleaning and maintenance efficiency, reduce the maintenance cost and meet the requirements of high-efficiency storage and transportation of a large quantity of liquid hydrogen fuel on a railway transportation line.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (11)
1. The utility model provides a detachable low temperature filter equipment of liquid hydrogen storage tank, includes pipeline (9) that links to each other with liquid hydrogen storage tank exit, its characterized in that: the filter (1) is arranged inside the conveying pipeline (9) and the fixing sleeve (8) is arranged outside the conveying pipeline (9); one end of the fixed sleeve (8) is in seamless connection with the end face of the conveying pipeline (9), and the other end of the fixed sleeve (8) is in seamless connection with the connecting pipe flange (4); the filter (1) passes through the fixed sleeve (8) and is suspended in the inner cavity of the conveying pipeline (9), and the head of the filter (1) is detachably positioned and packaged in the fixed sleeve (8);
an internal thread (8-1) is arranged on the upper part of the inner wall of the fixed sleeve (8), and an internal bearing platform (8-2) is arranged on the lower part of the inner wall of the fixed sleeve (8); the filter (1) is of a cup cylinder structure on the whole and sequentially comprises a head support section (1-1), a middle filtering section (1-3) and a tail end socket section (1-4); the outer wall of the head support section (1-1) is provided with an outer flange (1-1 a), the outer flange (1-1 a) is in abutting fit with the inner bearing platform (8-2) through the sealing gasket (2), the top of the head support section (1-1) is provided with an annular pressing plate (3), and the outer wall threads of the annular pressing plate (3) are in locking fit with the inner threads (8-1), so that the head support section (1-1) is positioned and installed in the fixing sleeve (8); the middle filtering section (1-3) and the tail end socket section (1-4) extend and hang into the inner cavity of the conveying pipeline (9);
the inner wall of the head support section (1-1) is provided with an annular groove (1-1 c), a plurality of assembly tool insertion holes (1-1 d) are formed in the top of the head support section (1-1), and the assembly tool insertion holes (1-1 d) are semicircular opening through holes which are arranged along the edge of the annular groove (1-1 c) and axially extend to the inside of the annular groove (1-1 c);
an end surface annular groove (8-3) is formed in the top of the fixing sleeve (8) between the inner wall and the outer wall, and the inner side end of the end surface annular groove (8-3) is lower than the outer side end, so that an operation space convenient for disassembling or assembling the filter (1) is formed.
2. The liquid hydrogen storage tank detachable cryogenic filter device of claim 1, wherein: the root of the end face of the outer flange (1-1 a) is provided with a mounting ring groove (1-1 b), and the mounting ring groove (1-1 b) is used for embedding a sealing gasket (2).
3. The liquid hydrogen storage tank detachable cryogenic filter device of claim 1, wherein: four assembly tool jacks (1-1 d) are uniformly arranged along the edge of the annular groove (1-1 c).
4. The liquid hydrogen storage tank detachable cryogenic filter device of claim 1, wherein: the head support section (1-1) and the middle filter section (1-3) are also provided with a support transition section (1-2), the support transition section (1-2) comprises a conical transition section (1-2 a) and a cylindrical transition section (1-2 b) which are connected into a whole, the conical bottom of the conical transition section (1-2 a) is fixedly butted with the head support section (1-1), and the bottom of the cylindrical transition section (1-2 b) is fixedly butted with the middle filter section (1-3).
5. The liquid hydrogen storage tank detachable cryogenic filter device of claim 1, wherein: the middle filter section (1-3) is mainly formed by combining an outer filter screen (1-3 a), a middle filter element (1-3 b) and an inner filter screen (1-3 c).
6. The liquid hydrogen tank removable low temperature filter apparatus of claim 5, wherein: the outer layer filter screen (1-3 a) is composed of a single-layer stainless steel net with the mesh number of 90-120 meshes, the middle layer filter core (1-3 b) is composed of a plurality of layers of stainless steel nets with the mesh number of 500-600 meshes, and the inner layer filter screen (1-3 c) is formed by rolling a single-layer stainless steel porous sheet with the aperture of 8-12 mm.
7. The liquid hydrogen storage tank detachable cryogenic filter device of claim 1, wherein: the adapter flange (4) is connected to the blind flange (7) by means of a flange gasket (5) and a screw assembly (6) arranged in the circumferential direction, so that the filter (1) is sealed in the feed line (9) in the non-operating state.
8. A special assembly tool for a detachable cryogenic filter device for a liquid hydrogen storage tank according to claim 1, comprising an operating lever (11), characterized in that: the head part of the operating rod (11) is provided with an operating handle (10) which is arranged vertically with the operating rod, and the tail part of the operating rod (11) is provided with a positioning flange (12) which is arranged vertically with the operating rod; the diameter of the positioning flange (12) is smaller than the diameter of the inner wall of the fixed sleeve (8), so that the positioning flange can be axially inserted into the fixed sleeve (8) and can be abutted with the top of the head support section (1-1); the bottom of the positioning flange (12) is provided with a plurality of special pin shafts (13), and the special pin shafts (13) are in one-to-one correspondence with the opening positions of the assembly tool jacks (1-1 d), so that the special pin shafts can extend into the annular grooves (1-1 c) through the assembly tool jacks (1-1 d); the special pin shaft (13) is provided with a relief notch (13-1) corresponding to the pin body at the upper edge of the annular groove (1-1 c), the pin body at the lower part of the relief notch (13-1) forms a grabbing hook head (13-2), and the grabbing hook head (13-2) can move in the annular groove (1-1 c) to be misplaced and can be abutted with the upper edge of the annular groove (1-1 c) through rotating the positioning flange (12), so that the filter (1) is lifted and detached.
9. The special assembly tool for a detachable cryogenic filter device of a liquid hydrogen storage tank according to claim 8, wherein: four special pin shafts (13) are uniformly arranged in one-to-one correspondence with the assembly tool jacks (1-1 d).
10. A method of using the special assembly tool of claim 8, wherein: firstly, coaxially aligning an operating rod (11) of a special assembly tool with a head support section (1-1) of a filter (1), and axially inserting a positioning flange (12) at the tail of the operating rod (11) into a fixed sleeve (8); then, the angle of the positioning flange (12) is adjusted, so that the special pin shaft (13) on the positioning flange is aligned with the assembly tool insertion holes (1-1 d) on the head support section (1-1) one by one and then is inserted into the annular groove (1-1 c); then the operation handle (10) is rotated to drive the positioning flange (12) to synchronously rotate, so that the grabbing hook head (13-2) of the special pin roll (13) also rotates in the annular groove (1-1 c) and is staggered with the corresponding assembly tool jack (1-1 d); finally, the filter (1) can be taken out by holding the operating handle (10) and lifting the positioning flange (12) upwards.
11. The method of using a specialized assembly tool as recited in claim 10, wherein: the rotation angle of the grabbing hook head (13-2) of the special pin shaft (13) in the annular groove (1-1 c) is 10-80 degrees.
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| CN202110768845.5A CN113513703B (en) | 2021-07-07 | 2021-07-07 | Detachable low-temperature filtering device for liquid hydrogen storage tank, special assembly tool for detachable low-temperature filtering device and use method of detachable low-temperature filtering device |
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| CN202110768845.5A CN113513703B (en) | 2021-07-07 | 2021-07-07 | Detachable low-temperature filtering device for liquid hydrogen storage tank, special assembly tool for detachable low-temperature filtering device and use method of detachable low-temperature filtering device |
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