CN114941649B - Flame-retardant bolt assembly and connecting structure - Google Patents
Flame-retardant bolt assembly and connecting structure Download PDFInfo
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- CN114941649B CN114941649B CN202210547314.8A CN202210547314A CN114941649B CN 114941649 B CN114941649 B CN 114941649B CN 202210547314 A CN202210547314 A CN 202210547314A CN 114941649 B CN114941649 B CN 114941649B
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- bottom plate
- flame
- retardant
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- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 239000003063 flame retardant Substances 0.000 title claims abstract description 45
- 238000009413 insulation Methods 0.000 claims abstract description 50
- 230000003647 oxidation Effects 0.000 claims abstract description 15
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 15
- 230000003014 reinforcing effect Effects 0.000 claims description 16
- 230000000149 penetrating effect Effects 0.000 claims description 10
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 229910000601 superalloy Inorganic materials 0.000 claims description 2
- 239000003292 glue Substances 0.000 description 6
- 238000005728 strengthening Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
- F16B41/002—Measures against loss of bolts, nuts or pins
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
- F16B37/04—Devices for fastening nuts to surfaces, e.g. sheets, plates
- F16B37/048—Non-releasable devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B43/00—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
- F16B5/0258—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread using resiliently deformable sleeves, grommets or inserts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/021—Shape or form of insulating materials, with or without coverings integral with the insulating materials comprising a single piece or sleeve, e.g. split sleeve, two half sleeves
-
- 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
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Plates (AREA)
Abstract
The invention discloses a flame-retardant bolt assembly and a connecting structure, comprising: the bolts, the bottom plate, the base I and the base II form a multi-layer heat-insulating flame-retardant structure. The flame-retardant bolt assembly is used for connecting the connected piece A and the connected piece B to form a channel which can be communicated with a high-temperature medium, when the channel is in a high-temperature environment, the bolt provides rigidity strength, the bottom plate provides heat resistance and oxidation resistance, the base II and the base I provide heat insulation and flame retardance, the bottom plate, the base I and the base II wrap and cover the axial head part of the bolt outside a high-temperature area, and the problem that the existing bolt assembly cannot play a role in axial heat insulation and flame retardance is solved.
Description
Technical Field
The invention relates to a flame-retardant bolt assembly and a connecting structure, and belongs to the technical field of fastening connecting pieces.
Background
In the use of modern mechanical products, more and more mechanical products work under a high-temperature working environment, the mechanical products work under the high-temperature environment have a general requirement that mechanical parts must keep certain performance indexes such as strength, rigidity and the like under the high temperature, so that the mechanical connecting piece is ensured to work at the high temperature without failure when being connected, and the conditions of heat energy loss and combustion caused by high Wen Xiangwai diffusion outside a high-temperature area when the connected part is damaged are avoided.
In some cases, two connected pieces in the mechanical product need to be connected through nuts and bolts to form a heat-conducting channel inside, but the existing bolt assembly has the problem that the heat insulation and flame retardance effects cannot be achieved, for example, in a heat insulation coupler for torque calibration of Chinese patent publication No. CN111649075A, the two connected pieces are connected through the bolt assembly by matching the outer diameter peripheral surfaces of a heat insulation bolt and a heat insulation sleeve, and the existing bolt assembly cannot achieve the axial heat insulation and flame retardance effects.
Disclosure of Invention
In order to solve the technical problems, the invention provides a flame-retardant bolt assembly and a connecting structure.
The invention is realized by the following technical scheme.
The invention provides a flame-retardant bolt assembly, which comprises: the bolts, the bottom plate, the base I and the base II form a multi-layer heat-insulating flame-retardant structure.
The bolt provides strength and rigidity at high temperatures;
the bottom plate is tightly sleeved on the polished rod part at the top end of the bolt in an interference manner, and provides heat resistance and oxidation resistance;
the base I is tightly sleeved on the polish rod part at the top end of the bolt in an interference manner, and is fixedly arranged on the upper part of the bottom plate;
the base II is matched with the upper part of the base I and covers the top surface of the bolt, and the base II and the base I provide heat insulation and flame retardance;
the base plate, the base I and the base II cover the head of the bolt in a wrapping way, the bolt provides rigidity strength, the base plate provides heat resistance and oxidation resistance, and the base II and the base I provide heat insulation and flame retardance to form a flame-retardant bolt assembly of the multi-layer heat insulation and flame retardance structure.
The bolt is GH2132 superalloy.
The bolt includes: a bolt polish rod;
the external thread is positioned at one end of the bolt polished rod and used for screwing connection;
and the triangular head is positioned at the other end of the bolt polished rod.
And an excessive arc is arranged between the triangular head and the bolt polish rod.
The bottom plate is made of 0Cr18Ni9 stainless steel plate, so that the bottom plate has heat resistance and oxidation resistance.
The base plate comprises: a bottom plate upper plane;
the outer circle surface of the bottom plate is positioned at the periphery of the upper plane of the bottom plate;
the lower surface of the bottom plate is positioned on the lower surface of the upper plane of the bottom plate;
the bottom plate through hole is arranged in the middle of the upper plane of the bottom plate and is tightly sleeved with the bolt light rod of the bolt;
and the bottom plate reinforcing rib is protruded on the upper plane of the bottom plate, the bottom of the bottom plate reinforcing rib is a groove, and the bottom plate exhaust hole penetrates through the upper plane of the bottom plate.
The bottom plate reinforcing ribs are distributed at intervals.
The bottom plate exhaust hole is positioned between the two bottom plate reinforcing ribs.
The base I includes: the top surface of the base I boss is in contact correspondence with the bottom surface of the triangular head when being installed;
the cylindrical surface of the boss of the base I is positioned at the periphery of the boss of the base I;
the base I exhaust hole penetrates through the non-center of the base I boss and is used for exhausting, and the base I through hole penetrates through the center of the base I boss and is tightly sleeved with the bolt polish rod of the bolt in an interference manner;
the integrative I upper surface of base that extends in I boss periphery of base, I upper surface of base and I boss of base form the step on I boss face of cylinder of base, I boss of base and I upper surface of base have I concave station of base, I concave station of base is used for cooperating with the triangle head bottom surface.
The base II comprises: a base concave table;
the lower surface of the base II integrally extends to one end of the base concave table, and correspondingly contacts with the upper surface of the base I when the lower surface of the base II is installed;
the upper surface of the base II integrally extends to the other end of the base concave table, and a base II concave table is arranged on the inner surface of the middle part of the upper surface of the base II;
through holes of the base II are formed in the center of the base concave table, and through holes of the base II are formed in the non-center of the base concave table.
And the base II vent hole corresponds to the base I vent hole and the base plate vent hole when being installed.
Base II and base I all adopt T300 carbon cloth, make base II and base I provide thermal-insulated fire behaviour.
The invention has the beneficial effects that: the flame-retardant bolt assembly is used for connecting the connected piece A and the connected piece B to form a channel which can be communicated with a high-temperature medium, when the channel is in a high-temperature environment, the bolt provides rigidity strength, the bottom plate provides heat resistance and oxidation resistance, the base II and the base I provide heat insulation and flame retardance, the bottom plate, the base I and the base II wrap and cover the axial head part of the bolt outside a high-temperature area, and the problem that the existing bolt assembly cannot play a role in axial heat insulation and flame retardance is solved.
Drawings
FIG. 1 is a schematic view of a flame retardant bolt assembly of the present invention;
FIG. 2 is a schematic front view of a bolt of the present invention;
FIG. 3 is a schematic top view of the bolt of the present invention;
FIG. 4 is a schematic front cross-sectional view of the base plate of the present invention;
FIG. 5 is a schematic cross-sectional view taken along line A-A of FIG. 4;
FIG. 6 is a schematic top view of the base plate of the present invention;
FIG. 7 is a schematic front cross-sectional view of the base I of the present invention;
FIG. 8 is a schematic front cross-sectional view of a base II of the present invention;
FIG. 9 is a schematic view of a flame retardant nut assembly of the invention;
FIG. 10 is a schematic top view of the self-locking nut of the present invention;
FIG. 11 is a schematic cross-sectional view taken along line B-B of FIG. 10;
FIG. 12 is a schematic top view of the inner hexagonal cap of the present invention;
FIG. 13 is a schematic front view in cross section of the inner hexagonal cap of the present invention;
FIG. 14 is a schematic view of the connection structure of the flame retardant bolt assembly and the flame retardant nut assembly of the present invention;
in the figure: 1-a bolt; 11-a bolt polish rod; 12-external threads; 13-triangular heads; 14-transition arc; 2-a bottom plate; 24-a floor upper plane; 25-the outer circular surface of the bottom plate; 26-a lower surface of the soleplate; 27-a floor via; 28-a bottom plate reinforcing rib; 29-floor vents; 3-a base I; 31-a boss of the base I; 32-a boss cylindrical surface of the base I; 33-a base I exhaust hole; 34-a through hole of the base I; 35-the upper surface of the base I; 36-a concave table of a base I; 4-a base II; 41-a base recess; 42-the lower surface of the base II; 43-the upper surface of the base II; 44-a concave table of a base II; 45-a base II cylindrical surface; 46-a base II through hole; 47-a base II exhaust hole; 5-inner hexagonal cap; 51-cap outer cone; 52-inner hexagonal trepanning; 53-a fastening section; 6-heat insulation pad A; 7-a heat insulation pad B; 8-lining net; 9-self-locking nuts; 91-a self-locking nut outer cylinder; 92-an internally threaded bore; 93-self-locking nut flange end face; 94-a self-locking nut through hole; 95-reinforcing rib A; 96-reinforcing ribs B; 101-a connected piece a; 102-connected piece B; 103-channel.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the above.
As shown in fig. 1 to 14.
A flame retardant bolt assembly, comprising: a bolt 1 screwed with a self-locking nut 9 of the flame-retardant nut assembly, the bolt 1 providing strength and rigidity at high temperature;
the base plate 2 is tightly sleeved on the polish rod part at the top end of the bolt 1 in an interference manner, the base plate 2 provides heat resistance and oxidation resistance, and the base II 4 and the base I3 are protected;
the base I3 is tightly sleeved on the polish rod part at the top end of the bolt 1 in an interference manner, and the base I3 is tightly adhered and fixed on the upper part of the bottom plate 2 through high-temperature glue;
the base II 4 is matched with the upper part of the base I3 and covers the top surface of the bolt 1, the base 3 and the base II 4 are tightly adhered and fixed through high-temperature glue, and the base II 4 and the base I3 provide heat insulation and flame retardance;
the bottom plate 2, the base I3 and the base II 4 cover the head of the bolt 1, the bolt 1 provides rigidity strength, the bottom plate 2 provides heat resistance and oxidation resistance, and the base II 4 and the base I3 provide heat insulation and flame retardance to form a flame-retardant bolt assembly of the multilayer heat insulation and flame retardance structure.
The flame-retardant bolt assembly is used for connecting the connected piece A101 and the connected piece B102 to form the channel 103 through which a high-temperature medium can pass, when the channel 103 is in a high-temperature environment, the bolt 1 provides rigidity strength, the bottom plate 2 provides heat resistance and oxidation resistance, the base II 4 and the base I3 provide heat insulation and flame retardance, the bottom plate 2, the base I3 and the base II 4 cover the axial head part of the bolt 1 outside a high-temperature area, and the problem that the existing bolt assembly cannot play a role in axial heat insulation and flame retardance is solved.
The bolt 1 is GH2132 high-temperature alloy, the strength sigma b is more than or equal to 900MPa, the strength and the rigidity of the bolt 1 are provided at high temperature, the performance of the bolt 1 in a high-temperature environment is not met when the strength is too low, and the bolt is easy to break after being assembled after the strength is too high.
The bolt 1 includes: a bolt polish rod 11 providing a stressed base;
an external thread 12 which is positioned at one end of the bolt polished rod 11 and used for screwing connection, and the external thread 12 is screwed with an internal threaded hole of the self-locking nut 9 of the flame-retardant nut component;
and a triangular head 13 positioned at the other end of the bolt polish rod 11, wherein an excessive arc 14 is arranged between the triangular head 13 and the bolt polish rod 11.
The base plate 2 is made of a 0Cr18Ni9 stainless steel plate, so that the base plate 2 has heat resistance and oxidation resistance, and is beneficial to protecting the base I3 and the base II 4 from failure.
The base plate 2 includes: a floor upper plane 24 providing a load bearing basis;
a bottom plate outer circumferential surface 25 located at the outer circumference of the bottom plate upper plane 24;
the lower surface 26 of the bottom plate is positioned on the lower surface of the upper plane 24 of the bottom plate, and the lower surface 26 of the bottom plate is correspondingly contacted and installed with the triangular head 13 when being installed;
the bottom plate through hole 27 is arranged in the middle of the upper plane 24 of the bottom plate, and the bottom plate through hole 27 is tightly sleeved with the bolt polish rod 11 of the bolt 1;
the bottom plate strengthening ribs 28 are arranged on the upper plane 24 of the bottom plate in a protruding mode, the bottom plate strengthening ribs 28 are arranged at intervals, grooves are formed in the bottoms of the bottom plate strengthening ribs 28, bottom plate exhaust holes 29 are formed in the upper plane 24 of the bottom plate in a penetrating mode, the bottom plate exhaust holes 29 are located between the two bottom plate strengthening ribs 28, the aperture size of the bottom plate exhaust holes 29 is as small as possible, and the exhaust requirement during assembly is met.
The base I3 comprises: a base I boss 31 for providing a foundation is provided, and the top surface of the base I boss 31 is in contact with the bottom surface of the triangular head 13 when being installed;
the base I boss cylindrical surface 32 is positioned on the periphery of the base I boss 31;
the base I exhaust hole 33 is arranged in the non-center of the base I boss 31 in a penetrating way and is used for exhausting, the base I exhaust hole 33 corresponds to the base plate exhaust hole 29 in the installation process, and the base I through hole 34 is arranged in the center of the base I boss 31 in a penetrating way and is tightly sleeved with the bolt polished rod 11 of the bolt 1 in an interference way;
the integrative I upper surface 35 of base that extends in I boss 31 periphery of base, I upper surface 35 of base and I boss 31 of base form the step on I boss face of cylinder 32 of base, I boss 31 of base have I concave station 36 of base with I upper surface 35 of base, I concave station 36 of base are used for holding with triangle head 13 bottom surface close contact cooperation.
The base II 4 comprises: a base recess 41 providing a foundation for stress;
the lower surface 42 of the base II integrally extends to one end of the base concave table 41, and the lower surface 42 of the base II is correspondingly contacted with the upper surface 35 of the base I when being installed;
the upper surface 43 of the base II integrally extends to the other end of the base concave table 41, the inner surface of the middle part of the upper surface 43 of the base II is provided with a base II concave table 44, and the base concave table 41 is externally provided with a base II cylindrical surface 45;
the base II through hole 46 penetrating through the center of the base concave 41 penetrates through the base II exhaust hole 47 not in the center of the base concave 41, and the base II exhaust hole 47 corresponds to the base I exhaust hole 33 and the bottom plate exhaust hole 29 when being installed.
The base II 4 and the base I3 are made of T300 carbon cloth, the technical indexes are 3K plain weave, the warp density is 20/25 mm, and the weft density is 20/25 mm, so that the base II 4 and the base I3 provide heat insulation and flame retardance.
Two connected pieces in the mechanical product are connected through nuts and bolts to form a heat-conducting channel inside, and the existing nut component has the problems that heat can be insulated but flame retardance and strength are insufficient, such as a heat insulation nut for a hub motor, a wheel and a vehicle which are disclosed in China patent publication No. CN112366872A, and the head and the mounting part of the heat insulation nut are made of heat insulation materials to play a role in heat insulation, but the problems that flame retardance and strength cannot meet requirements in a certain high-temperature environment exist.
A flame retardant nut assembly, comprising: a self-locking nut 9 screwed with the bolt 1 of the flame-retardant bolt assembly, the self-locking nut 9 providing strength and rigidity at high temperature;
a lining net 8 is positioned at the lower part of the self-locking nut 9 and is tightly adhered and fixed by high-temperature glue, and the lining net 8 provides heat resistance and oxidation resistance;
the heat insulation pad B7 is positioned at the lower part of the lining net 8 and is tightly adhered and fixed by high-temperature glue;
the heat insulation pad A6 is positioned at the lower part of the heat insulation pad B7 and is tightly adhered and fixed through high-temperature glue, and the heat insulation pad A6 and the heat insulation pad B7 provide heat insulation and flame retardance;
the inner hexagonal sleeve cap 5 is positioned at the lower part of the heat insulation pad A6, is tightly adhered and fixed through high-temperature glue, and wraps the heat insulation pad A6, the heat insulation pad B7, the lining net 8 and the self-locking nut 9, and the inner hexagonal sleeve cap 5 provides strength and rigidity at high temperature to form the flame-retardant nut component with a multi-layer heat insulation flame-retardant structure.
In the connecting place of the self-locking nut 9 of the flame-retardant nut assembly to the connected piece A101 and the connected piece B102, a heat-conducting channel 103 is formed inside, when a high-temperature medium exists in the channel 103 to form a high-temperature environment, the inner hexagonal sleeve cap 5 and the self-locking nut 9 provide strength and rigidity at high temperature, the heat insulation pad A6 and the heat insulation pad B7 provide heat insulation, flame retardance and the lining net 8 provide heat resistance and oxidation resistance, and the inner hexagonal sleeve cap 5 wraps and buckles the heat insulation pad A6, the heat insulation pad B7, the lining net 8 and the periphery of the self-locking nut 9 on the self-locking nut 9, so that the problem that the existing bolt assembly cannot play a role in axial heat insulation and flame retardance is solved.
The self-locking nut 9 and the inner hexagonal sleeve cap 5 are made of GH2132 and GH4169 high-temperature alloy, the strength is sigma b=900-1005 Mpa, the strength and rigidity are provided for the self-locking nut 9 at high temperature, the overall performance is not satisfied due to the too low strength, and the subsequent assembly is easy to break due to the too high strength.
The self-locking nut 9 comprises:
a self-locking nut outer cylinder 91 providing a load bearing basis;
the inner threaded hole 92 is arranged in the middle of the outer cylinder 91 of the self-locking nut in a penetrating way, and the inner threaded hole 92 is screwed and connected with the outer thread 12 of the bolt 1 when the self-locking nut is assembled and used, so that the flame-retardant bolt component and the flame-retardant nut component are connected with the connected piece A101 and the connected piece B102;
the self-locking nut flange end face 93 integrally extends to the periphery of the bottom of the self-locking nut outer cylinder 91, and a self-locking nut through hole 94 is formed in the self-locking nut flange end face 93;
the self-locking nut flange end face 93 is respectively provided with a reinforcing rib A95 and a reinforcing rib B96, the reinforcing ribs A95 and B96 are positioned on the self-locking nut flange end face 93 at the inner side and the outer side of the self-locking nut through hole 94, and grooves are formed in the bottoms of the reinforcing ribs A95 and B96 and used for assembling and exhausting.
The inner hexagonal cap 5 includes: the outer cone 51 of the cap is provided with a stress foundation, the outer surface of the outer cone 51 of the cap is a conical surface, the middle part of the outer cone 51 of the cap is provided with a concave part to form an inner hexagonal sleeve hole 52, and the inner hexagonal wrench is matched with the inner hexagonal sleeve hole 52 to perform screwing and unscrewing operations during assembly;
the fastening section 53 integrally extends on the periphery of the cap outer cone 51, and the fastening section 53 and the self-cap outer cone 51 form a package for the periphery of the heat insulation pad A6, the heat insulation pad B7, the lining net 8 and the self-locking nut 9.
The lining net 8 is made of a stainless steel net material of 0Cr18Ni9, the diameter of a steel wire is phi 0.125mm, the side length of a square hole is 0.2mm, and the weaving precision grade is B grade, so that the heat resistance and the oxidation resistance of the lining net 8 are realized.
The heat insulation pad A6 and the heat insulation pad B7 are made of high silica glass fiber heat insulation felts, the flame retardant heat insulation effect is reliable, and the thickness is selected according to SF-02 or SF-04 according to heat insulation requirements and structural dimensions.
When the flame-retardant nut component and the flame-retardant bolt component are screwed to connect the connected piece A101 and the connected piece B102 to form a connecting structure, the connecting structure specifically comprises: the self-locking nut outer cylinder 91 of the self-locking nut 9 stretches into a connecting through hole on the connected piece B102, the bolt 1 stretches into a flame-retardant nut assembly formed by the connecting through hole of the connected piece A101 and the self-locking nut 9 from the inner threaded hole 92, so that a through hole for passing heat is formed inside after the connected piece A101 and the connected piece B102 are connected, the bolt 1 and the self-locking nut 9 provide strength and rigidity in the through hole 103, when a high-temperature fluid medium in the through hole 103 circulates to form a high-temperature environment, the bolt 1, the bottom plate 2, the base II 4 and the base I3 form a heat-insulating flame-retardant bolt assembly, the bottom plate 2 of the flame-retardant bolt assembly is tightly contacted with the connected piece A101 to block the connecting through hole of the connected piece A101, the self-locking nut 9, the lining net 8, the heat-insulating pad B7, the heat-insulating pad A6 and the inner hexagonal sleeve cap 5 are contacted with the bottom surface of the connecting through hole of the connected piece B102, the self-locking nut flange end face 93 of the self-locking nut 9 on the flame-retardant nut assembly is prevented from being damaged by the bottom surface of the connected piece B102, and the condition that the high-temperature area is caused by high Wen Xiangwai diffusion and the high-temperature area is outside is caused, and the high-temperature area is prevented from being damaged, and the high-temperature work is not blocked between the connected pieces is ensured.
When in assembly connection, the bottom plate reinforcing rib 28 is contacted with the connected piece A101 to generate elastic extrusion force, the reinforcing rib A95 is contacted with the connected piece B102 to generate elastic extrusion force, and the tension bolt 1 and the self-locking nut 9 are opposite to each other to generate elastic extrusion force with the bottom plate reinforcing rib 28 to form a self-locking state.
Claims (8)
1. A flame retardant bolt assembly, comprising: the bolts (1), the bottom plate (2), the base I (3) and the base II (4) form a multi-layer heat-insulating flame-retardant structure;
the base II (4) comprises: a base concave table (41);
the lower surface (42) of the base II integrally extends to one end of the base concave table (41), and the lower surface (42) of the base II is correspondingly contacted with the upper surface (35) of the base I when being installed;
the upper surface (43) of the base II integrally extends to the other end of the base concave table (41), and the concave table (44) of the base II is arranged on the inner surface of the middle part of the upper surface (43) of the base II;
a base II through hole (46) penetrating through the center of the base concave table (41), and a base II exhaust hole (47) penetrating through the non-center of the base concave table (41);
the bolt (1) provides strength and rigidity at high temperatures;
the bottom plate (2) is tightly sleeved on the polished rod part at the top end of the bolt (1) in an interference manner, and the bottom plate (2) provides heat resistance and oxidation resistance;
the base I (3) is tightly sleeved on the polish rod part at the top end of the bolt (1) in an interference manner, and the base I (3) is fixedly arranged on the upper part of the bottom plate (2);
the base II (4) is matched with the upper part of the base I (3) and covers the top surface of the bolt (1), and the base II (4) and the base I (3) provide heat insulation and flame retardance;
the base plate (2), the base I (3) and the base II (4) cover the head of the bolt (1), the bolt (1) provides rigidity strength, the base plate (2) provides heat resistance and oxidation resistance, and the base II (4) and the base I (3) provide heat insulation and flame retardance to form a flame-retardant bolt assembly of the multi-layer heat insulation and flame retardance structure.
2. Flame retardant bolt assembly according to claim 1, wherein the bolt (1) comprises: a bolt polish rod (11);
an external thread (12) positioned at one end of the bolt polish rod (11) and used for screwing connection;
and the triangular head (13) is positioned at the other end of the bolt polish rod (11).
3. The flame retardant bolt assembly of claim 2, wherein: an excessive arc (14) is arranged between the triangular head (13) and the bolt polish rod (11).
4. The flame retardant bolt assembly of claim 1, wherein: the base plate (2) is a 0Cr18Ni9 stainless steel plate, so that the base plate (2) has heat resistance and oxidation resistance; the bolt (1) is GH2132 superalloy; the base II (4) and the base I (3) are made of T300 carbon cloth, so that the base II (4) and the base I (3) have heat insulation and flame retardance.
5. Flame retardant bolt assembly according to claim 1, wherein the base plate (2) comprises: a floor upper plane (24);
the bottom plate outer circular surface (25) is positioned at the periphery of the bottom plate upper plane (24);
a lower floor surface (26) located at a lower surface of the upper floor surface (24);
the bottom plate through hole (27) is arranged in the middle of the upper plane (24) of the bottom plate, and the bottom plate through hole (27) is tightly sleeved with the bolt polish rod (11) of the bolt (1);
and the bottom plate reinforcing ribs (28) are protruded on the upper plane (24) of the bottom plate, the bottoms of the bottom plate reinforcing ribs (28) are grooves, and bottom plate exhaust holes (29) penetrating through the upper plane (24) of the bottom plate.
6. The flame retardant bolt assembly of claim 5, wherein: the bottom plate reinforcing ribs (28) are distributed at intervals; the bottom plate exhaust hole (29) is positioned between the two bottom plate reinforcing ribs (28).
7. Flame retardant bolt assembly according to claim 1, wherein the base i (3) comprises: the top surface of the base I boss (31) is in contact correspondence with the bottom surface of the triangular head (13) when being installed;
the cylindrical surface (32) of the boss of the base I is positioned at the periphery of the boss (31) of the base I;
a base I vent hole (33) which is arranged in the non-center of the base I boss (31) in a penetrating way and is used for exhausting, and a base I through hole (34) which is arranged in the center of the base I boss (31) in a penetrating way and is tightly sleeved with the bolt polish rod (11) of the bolt (1) in an interference way;
the integrated base I upper surface (35) extending to the periphery of the base I boss (31), the base I boss (31) and the base I upper surface (35) are provided with a base I concave table (36), and the base I concave table (36) is used for being matched with the bottom surface of the triangular head (13).
8. A connection structure, characterized by comprising: the flame-retardant bolt assembly and the flame-retardant nut assembly as claimed in any one of claims 1 to 7, the connected piece A (101) and the connected piece B (102), wherein a self-locking nut outer cylinder (91) of the self-locking nut (9) extends from a connecting through hole on the connected piece B (102), the bolt (1) extends from the connecting through hole of the connected piece A (101) and is screwed with an internal threaded hole (92) of the self-locking nut (9), so that a heat-conducting channel (103) is formed inside after the connected piece A (101) and the connected piece B (102), the bolt (1) and the self-locking nut (9) provide strength and rigidity in the channel (103), when a high-temperature fluid medium flows in the channel (103) to form a high-temperature environment, the heat-insulating flame-retardant bolt assembly is formed by the bolt (1), the bottom plate (2) and the base II (4) and the base I (3), the bottom plate (2) of the flame-retardant bolt assembly closely contacts with the connected piece A (101), the self-locking nut (9), the lining net (8), the heat-insulating pad (7), the heat-insulating pad A (6) and the six-insulating nut assembly are formed by a flame-retardant sleeve assembly, the end face (93) of the self-locking nut flange of the self-locking nut (9) on the flame-retardant nut component contacts with the bottom surface of the connected piece B (102) to block the connecting through hole of the connected piece B (102).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210547314.8A CN114941649B (en) | 2022-05-19 | 2022-05-19 | Flame-retardant bolt assembly and connecting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210547314.8A CN114941649B (en) | 2022-05-19 | 2022-05-19 | Flame-retardant bolt assembly and connecting structure |
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| Publication Number | Publication Date |
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| CN114941649A CN114941649A (en) | 2022-08-26 |
| CN114941649B true CN114941649B (en) | 2023-06-23 |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201246392Y (en) * | 2008-08-22 | 2009-05-27 | 贵州航天精工制造有限公司 | Specific force-bearing quick-releasing lock |
| TWM422609U (en) * | 2011-09-29 | 2012-02-11 | Joker Ind Co Ltd | Insulation nail |
| CN202946516U (en) * | 2012-10-18 | 2013-05-22 | 北京临近空间飞行器系统工程研究所 | Screw thermal protection device |
| CN204326375U (en) * | 2014-12-20 | 2015-05-13 | 杭州荣平屋面瓦业有限公司 | The bituminized shingle of built-in nail |
| EP3330548B1 (en) * | 2016-11-30 | 2021-01-20 | Newfrey LLC | Fixing element and method for its production |
| CN107719631B (en) * | 2017-09-12 | 2020-08-14 | 江西洪都航空工业集团有限责任公司 | Connection structure integrating heat collection protection and assembly installation |
| CN209278559U (en) * | 2018-11-30 | 2019-08-20 | 湖北锂诺新能源科技有限公司 | Check valve rubber tack |
| CN110724980B (en) * | 2019-11-12 | 2021-01-26 | 贵州航天精工制造有限公司 | Local chromium plating method for stainless steel bolt |
| CN113915206B (en) * | 2021-11-11 | 2023-04-21 | 贵州航天精工制造有限公司 | Assembling and connecting method for composite material structure |
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