CN114941649A - Flame-retardant bolt assembly and connecting structure - Google Patents
Flame-retardant bolt assembly and connecting structure Download PDFInfo
- Publication number
- CN114941649A CN114941649A CN202210547314.8A CN202210547314A CN114941649A CN 114941649 A CN114941649 A CN 114941649A CN 202210547314 A CN202210547314 A CN 202210547314A CN 114941649 A CN114941649 A CN 114941649A
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- base
- bolt
- 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 43
- 239000003063 flame retardant Substances 0.000 title claims abstract description 41
- 238000009413 insulation Methods 0.000 claims abstract description 60
- 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 21
- 230000000149 penetrating effect Effects 0.000 claims description 10
- 239000000956 alloy Substances 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 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
- 230000007704 transition Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 230000009970 fire resistant effect Effects 0.000 claims 3
- 239000003292 glue Substances 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000694 effects Effects 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
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000012774 insulation 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
Images
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
Abstract
The invention discloses a flame-retardant bolt component and a connecting structure, comprising: the bolts, the bottom plate, the upper base and the lower base form a multi-layer heat-insulation 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 has the high-temperature medium to form a high-temperature environment, the bolt provides rigidity strength, the bottom plate provides heat resistance and oxidation resistance, the base and the upper base provide heat insulation and flame retardance, the axial head of the bolt, which is positioned outside a high-temperature area, is wrapped and covered by the bottom plate, the upper base and the lower base, 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 in a high-temperature working environment, and the mechanical products work in the high-temperature environment have a general requirement that mechanical parts must keep certain performance indexes such as strength and rigidity at high temperature, so that the mechanical connecting piece is ensured not to lose effectiveness when being connected at high temperature, and the condition that the connected part is damaged to cause heat energy loss and high temperature is diffused outwards to cause combustion outside a high-temperature area is avoided.
Sometimes two connected pieces in a mechanical product need to be connected through nuts and bolts to form a heat conduction channel, but the bolt assembly at present has the problem of being incapable of playing a role in heat insulation and flame retardance, for example, in a heat insulation coupler for torque calibration of Chinese patent publication No. CN111649075A, the disclosed heat insulation bolt and the outer diameter peripheral surface of a heat insulation sleeve are matched to form the bolt assembly to connect the two connected pieces, and the existing bolt assembly cannot play a role in axial heat insulation and flame retardance.
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 upper base and the lower base form a multi-layer heat-insulation 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 the bottom plate provides heat resistance and oxidation resistance;
the upper base is tightly sleeved on the polished rod part at the top end of the bolt in an interference manner, and the upper base is fixedly positioned at the upper part of the bottom plate;
the lower base is matched with the upper part of the upper base and covers the top surface of the bolt, and the lower base and the upper base provide heat insulation and flame retardance;
the bottom plate, the upper base and the lower base cover the head of the bolt in a wrapping mode, the bolt provides rigidity strength, the bottom plate provides heat resistance and oxidation resistance, and the base and the upper base provide heat insulation and flame retardance to form a flame-retardant bolt assembly with a multilayer heat insulation and flame-retardant structure.
The bolt is GH2132 high-temperature alloy.
The bolt includes: a bolt polish rod;
the external thread is positioned at one end of the bolt polish rod and used for screwing connection;
and the triangular head is positioned at the other end of the bolt polished rod.
And a transition circular arc is arranged between the triangular head and the bolt polish rod.
The bottom plate is made of a 0Cr18Ni9 stainless steel plate, so that the bottom plate has heat resistance and oxidation resistance.
The base plate, comprising: a bottom plate upper plane;
the outer circle surface of the bottom plate is positioned on 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 polish rod of the bolt;
the bottom plate reinforcing ribs protruding on the upper plane of the bottom plate are provided with grooves at the bottoms and penetrate through the bottom plate exhaust holes on 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 upper base includes: the bottom surface of the upper base boss is in contact and corresponding to the bottom surface of the triangular head when being installed;
an upper base boss cylindrical surface located at the periphery of the upper base boss;
the upper base exhaust hole penetrates through the non-center of the upper base boss and is used for exhausting, and the upper base through hole penetrates through the center of the upper base boss and is tightly sleeved with a bolt polish rod of a bolt in an interference manner;
an organic whole extends in the last base upper surface of last base boss periphery, goes up base upper surface and last base boss and forms the step on last base boss cylinder face, goes up the base boss and has last base concave station with last base upper surface, goes up the base concave station and is used for cooperating with the triangle head bottom surface.
The lower base includes: a base recessed platform;
the lower surface of the lower base integrally extends to one end of the concave platform of the base, and is correspondingly contacted with the upper surface of the upper base when being installed;
a lower base upper surface integrally extending to the other end of the base concave station, and a lower base lower concave station is arranged on the inner surface of the middle part of the lower base upper surface;
the lower base through hole is arranged in the center of the base concave station in a penetrating way, and the lower base exhaust hole is arranged in the non-center of the base concave station in a penetrating way.
The lower base exhaust hole corresponds to the upper base exhaust hole and the bottom plate exhaust hole when being installed.
The lower base and the upper base both adopt T300 carbon cloth, so that the lower base and the upper base provide heat insulation and flame retardant performance.
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 has the high-temperature medium to form a high-temperature environment, the bolt provides rigidity strength, the bottom plate provides heat resistance and oxidation resistance, the base and the upper base provide heat insulation and flame retardance, the axial head of the bolt, which is positioned outside a high-temperature area, is wrapped and covered by the bottom plate, the upper base and the lower base, 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 the 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 a 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 sectional front view of an upper base of the present invention;
FIG. 8 is a schematic sectional front view of a lower base of the present invention;
FIG. 9 is a schematic view of a flame-retardant nut assembly of the present 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 hexagonal socket cap of the present invention;
FIG. 13 is a schematic front sectional view of a hexagonal socket cap according to the present invention;
FIG. 14 is a schematic view showing a coupling structure of a fire-retardant bolt assembly and a fire-retardant nut assembly according to the present invention;
in the figure: 1-a bolt; 11-bolt polish rod; 12-external threads; 13-triangular head; 14-transition arc; 2-a bottom plate; 24-upper plane of the soleplate; 25-the excircle surface of the bottom plate; 26-bottom plate lower surface; 27-a floor via; 28-bottom plate reinforcing ribs; 29-bottom plate vent hole; 3, mounting a base; 31-upper base boss; 32-boss cylindrical surface of upper base; 33-upper base vent holes; 34-upper base through hole; 35-upper surface of upper base; 36-upper base concave; 4-lower base; 41-base concave table; 42-lower surface of lower base; 43-lower base upper surface; 44-lower base lower concave platform; 45-lower base cylindrical surface; 46-lower base through hole; 47-lower base vent hole; 5-inner hexagonal cap; 51-cap outer cone; 52-inner hexagonal trepanning; 53-a fastening section; 6-heat insulation pad A; 7-heat insulation pad B; 8-a backing net; 9-self-locking nut; 91-self-locking nut outer cylinder; 92-an internally threaded hole; 93-self-locking nut flange end face; 94-self-locking nut through hole; 95-reinforcing rib A; 96-reinforcing rib B; 101-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 described.
As shown in fig. 1-14.
A fire retardant bolt assembly comprising: the bolt 1 is tightly screwed with the self-locking nut 9 of the flame-retardant nut component, and the bolt 1 provides strength and rigidity at high temperature;
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 to protect the lower base 4 and the upper base 3;
the upper base 3 is tightly sleeved on the polished rod part at the top end of the bolt 1 in an interference manner, and the upper base 3 is tightly adhered and fixed on the upper part of the bottom plate 2 through high-temperature glue;
the lower base 4 is matched with the upper part of the upper base 3 and covers the top surface of the bolt 1, the base 3 and the lower base 4 are tightly adhered and fixed through high-temperature glue, and the lower base 4 and the upper base 3 provide heat insulation and flame retardance;
the bottom plate 2, the upper base 3 and the lower base 4 cover the head of the bolt 1 in a wrapping mode, the bolt 1 provides rigidity strength, the bottom plate 2 provides heat resistance and oxidation resistance, and the base 4 and the upper base 3 provide heat insulation and flame retardance to form a flame-retardant bolt assembly with a multi-layer heat insulation and flame-retardant structure.
The flame-retardant bolt assembly is used for connecting a connected piece A101 and a connected piece B102 to form a channel 103 which can be communicated with a high-temperature medium, when the high-temperature medium exists in the channel 103 to form a high-temperature environment, the bolt 1 provides rigidity strength, the bottom plate 2 provides heat resistance and oxidation resistance, the base 4 and the upper base 3 provide heat insulation and flame retardance, the axial head of the bolt 1, which is positioned outside a high-temperature area, is wrapped and covered by the bottom plate 2, the upper base 3 and the lower base 4, 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 made of GH2132 high-temperature alloy, the strength sigma b is larger than or equal to 900MPa, the bolt 1 can provide strength and rigidity at high temperature, the performance cannot meet the requirements at low strength and high strength in a high-temperature environment, and subsequent assembly is easy to break when the strength is too high.
The bolt 1 includes: a bolt polish rod 11 providing a stress base;
the external thread 12 is positioned at one end of the bolt polish rod 11 and used for screwing connection, and the external thread 12 is screwed with the internal thread hole of the self-locking nut 9 of the flame-retardant nut component;
and a triangular head 13 is positioned at the other end of the bolt polish rod 11, and a transition circular arc 14 is arranged between the triangular head 13 and the bolt polish rod 11.
The bottom plate 2 is made of 0Cr18Ni9 stainless steel, so that the bottom plate 2 has heat resistance and oxidation resistance, and the upper base 3 and the lower base 4 are protected from failure.
The base plate 2 includes: a floor upper plane 24 providing a stressed base;
a bottom plate outer circular surface 25 located at the periphery of the bottom plate upper plane 24;
a bottom plate lower surface 26 positioned on the lower surface of the bottom plate upper plane 24, wherein the bottom plate lower surface 26 is correspondingly contacted and installed with the triangular head 13 when being installed;
a 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 reinforcing ribs 28 protruding on the upper plane 24 of the bottom plate are a plurality of bottom plate reinforcing ribs 28 distributed at intervals, the bottoms of the bottom plate reinforcing ribs 28 are grooves and penetrate through the bottom plate exhaust holes 29 on the upper plane 24 of the bottom plate, the bottom plate exhaust holes 29 are located between the two bottom plate reinforcing 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 upper base 3 includes: providing a basic upper base boss 31, wherein the bottom surface of the upper base boss 31 is in contact and corresponding to the bottom surface of the triangular head 13 when being installed;
an upper base boss cylindrical surface 32 located on the periphery of the upper base boss 31;
an upper base exhaust hole 33 which is arranged in the non-center of the upper base boss 31 in a penetrating way and used for exhausting, wherein the upper base exhaust hole 33 corresponds to the bottom plate exhaust hole 29 when being installed, and an upper base through hole 34 which is arranged in the center of the upper base boss 31 in a penetrating way and tightly sleeved with the bolt polish rod 11 of the bolt 1 in an interference way;
an organic whole extends in the last base upper surface 35 of last base boss 31 periphery, goes up base upper surface 35 and last base boss 31 and forms the step on last base boss cylinder face 32, goes up base boss 31 and last base upper surface 35 and has last base concave station 36, goes up base concave station 36 and is used for holding with the cooperation of three horn head 13 bottom surfaces in close contact with.
The lower base 4 includes: a base platform 41 providing a force bearing base;
a lower base lower surface 42 integrally extending at one end of the base concave 41, the lower base lower surface 42 is correspondingly contacted with the upper base upper surface 35 when being installed;
a lower base upper surface 43 integrally extending to the other end of the base concave 41, a lower base lower concave 44 arranged on the inner surface of the middle part of the lower base upper surface 43, and a lower base cylindrical surface 45 arranged outside the base concave 41;
a lower base through hole 46 penetrating the center of the base concave 41, and a lower base vent hole 47 penetrating the non-center of the base concave 41, wherein the lower base vent hole 47 corresponds to the upper base vent hole 33 and the bottom vent hole 29 when installed.
The lower base 4 and the upper base 3 both adopt T300 carbon cloth, the technical index adopts 3K plain weave, the warp density is 20/25 mm, and the weft density is 20/25 mm, so that the lower base 4 and the upper base 3 provide heat insulation and flame retardant performance.
Sometimes two connected pieces in a mechanical product are connected inside through nuts and bolts to form a heat conduction channel, but the current nut assembly has the problems of heat insulation, flame retardance and insufficient strength, for example, the heat insulation nut for the hub motor, the wheel and the vehicle with the Chinese patent publication No. CN112366872A has the heat insulation effect by adopting heat insulation materials at the head part and the mounting part of the disclosed heat insulation nut, but has the problems of flame retardance and insufficient strength in certain high-temperature environment.
A flame retardant nut assembly comprising: the self-locking nut 9 is tightly screwed with the bolt 1 of the flame-retardant bolt assembly, and the self-locking nut 9 provides strength and rigidity at high temperature;
the lining net 8 is positioned at the lower part of the self-locking nut 9 and is tightly bonded and fixed by high-temperature glue, and the lining net 8 provides heat resistance and oxidation resistance;
a heat insulation pad B7 which 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 by high-temperature glue, and the heat insulation pad A6 and the heat insulation pad B7 provide heat insulation and flame retardance;
and the inner hexagonal sleeve cap 5 is tightly adhered and fixed at the lower part of the heat insulation pad A6 through high-temperature glue and wraps the heat insulation pad A6, the heat insulation pad B7, the lining net 8 and the periphery of the self-locking nut 9, and the inner hexagonal sleeve cap 5 provides strength and rigidity at high temperature to form a flame-retardant nut assembly with a multi-layer heat insulation flame-retardant structure.
In the passage 103 which is internally provided with heat conduction and is formed by connecting the self-locking nut 9 of the flame-retardant nut assembly with the connected piece A101 and the connected piece B102, when high-temperature media exist in the passage 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 and flame retardance, and the lining net 8 provides heat resistance and oxidation resistance, the inner hexagonal sleeve cap 5 wraps and tightly buckles the outer peripheries of the heat insulation pad A6, the heat insulation pad B7, the lining net 8 and the self-locking nut 9 on the self-locking nut 9, and the problem that the conventional 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 alloys, the strength is 900-1005 Mpa at sigma b, the strength and rigidity are provided for the self-locking nut 9 at high temperature, the overall performance cannot meet the requirements if the strength is too low, and subsequent assembly is easy to break if the strength is too high.
The self-locking nut 9 comprises:
an outer cylinder 91 of the self-locking nut providing a stress base;
the internal thread hole 92 penetrates through the middle part of the outer cylinder 91 of the lock nut, and the internal thread hole 92 is screwed with the external thread 12 of the bolt 1 during assembly and use, so that the connection of the flame-retardant bolt assembly and the flame-retardant nut assembly to the connected piece A101 and the connected piece B102 is realized;
the self-locking nut flange end face 93 integrally extends to the periphery of the bottom of the outer cylinder 91 of the self-locking nut, and a self-locking nut through hole 94 is formed in the self-locking nut flange end face 93;
and the end surface 93 of the self-locking nut flange is respectively provided with a reinforcing rib A95 and a reinforcing rib B96, the reinforcing ribs A95 and the reinforcing ribs B96 are positioned on the end surface 93 of the self-locking nut flange at the inner side and the outer side of the through hole 94 of the self-locking nut, and the bottoms of the reinforcing ribs A95 and the reinforcing ribs B96 are provided with grooves for assembling and exhausting.
The inner hexagonal cap 5 includes: providing a sleeve cap outer cone body 51 of a stress base, wherein the outer surface of the sleeve cap outer cone body 51 is a conical surface, a recess is arranged in the middle of the sleeve cap outer cone body 51 to form an inner hexagonal sleeve hole 52, and an inner hexagonal wrench is matched with the inner hexagonal sleeve hole 52 to perform screwing and unscrewing operation during assembly;
the fastening section 53 integrally extends on the periphery of the outer cone 51 of the cap, and the fastening section 53 and the outer cone 51 of the self-cap form a package for the peripheries 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 0Cr18Ni9 stainless steel net, the diameter of a steel wire is phi 0.125mm, the side length of a square hole is 0.2mm, the weaving precision grade is B grade, and 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 both adopt high silica glass fiber heat insulation felts, the flame retardant and heat insulation effects are reliable, and the thickness is selected according to the heat insulation requirements and the structural size according to SF-02 or SF-04.
When the flame-retardant nut component and the flame-retardant bolt component are used for screwing the connecting structure formed by connecting the connected piece A101 and the connected piece B102, the connection structure specifically comprises the following steps: an outer cylinder 91 of a lock nut of the self-locking nut 9 extends into a connecting through hole on a connected piece B102, the bolt 1 extends into an inner threaded hole 92 of the self-locking nut 9 from a connecting through hole of a connected piece A101 and is screwed with the inner threaded hole 92 of the self-locking nut 9, so that a heat conduction channel 103 is formed inside the connected piece A101 and the connected piece B102, the bolt 1 and the self-locking nut 9 provide strength and rigidity to be positioned in the channel 103, when high-temperature fluid medium circulates in the channel 103 to form a high-temperature environment, the bolt 1, the bottom plate 2, the base 4 and the upper base 3 form a heat-insulation and 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-insulation pad B7, the heat-insulation pad A6 and the inner hexagonal sleeve cap 5 form a flame-retardant nut assembly, the flange end surface 93 of the self-locking nut 9 on the flame-retardant nut assembly is contacted with the bottom surface of the connected piece B102 to block the connecting through hole of the connected piece B102, the situation that the outside of a high-temperature area causes combustion due to heat energy loss and high temperature outward diffusion caused by damage of the connected part is avoided, and the connected part between the connecting pieces does not lose efficacy when working at high temperature.
During assembly and connection, the baseplate reinforcing ribs 28 are in contact with the connected piece A101 to generate elastic extrusion force, the reinforcing ribs A95 are in contact with the connected piece B102 to generate elastic extrusion force, and the elastic extrusion force generated by the baseplate reinforcing ribs 28 is opposite to the tensioning bolt 1 and the self-locking nut 9 to form a self-locking state.
Claims (10)
1. A fire resistant bolt assembly, comprising: the bolt (1), the bottom plate (2), the upper base (3) and the lower base (4) form a multi-layer heat-insulation flame-retardant structure.
2. The fire retardant bolt assembly of claim 1, wherein: 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 upper base (3) is tightly sleeved on the polished rod part at the top end of the bolt (1) in an interference manner, and the upper base (3) is fixedly positioned at the upper part of the bottom plate (2);
the lower base (4) is matched with the upper part of the upper base (3) and covers the top surface of the bolt (1), and the lower base (4) and the upper base (3) provide heat insulation and flame retardance;
the bottom plate (2), the upper base (3) and the lower base (4) cover the head of the bolt (1) in a wrapping mode, the bolt (1) provides rigidity strength, the bottom plate (2) provides heat resistance and oxidation resistance, and the base (4) and the upper base (3) provide heat insulation and flame retardance to form a flame-retardant bolt assembly of a multi-layer heat insulation and flame-retardant structure.
3. A fire bolt assembly according to claim 2, characterised in that the sub-base (4) comprises: a base recessed platform (41);
a lower base lower surface (42) integrally extending at one end of the base concave table (41), wherein the lower base lower surface (42) is correspondingly contacted with the upper base upper surface (35) when being installed;
a lower base upper surface (43) integrally extending from the other end of the base concave (41), a lower base concave (44) is arranged on the inner surface of the middle part of the lower base upper surface (43);
a lower base through hole (46) penetrating through the center of the base concave table (41), and a lower base exhaust hole (47) penetrating through the non-center of the base concave table (41).
4. A fire bolt assembly according to claim 2, characterised in that the bolt (1) comprises: a bolt polish rod (11);
the external thread (12) is 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).
5. The fire retardant bolt assembly of claim 4, wherein: transition arcs (14) are arranged between the triangular head (13) and the bolt polish rod (11).
6. The fire resistant bolt assembly of claim 2, wherein: the bottom plate (2) is made of a 0Cr18Ni9 stainless steel plate, so that the bottom plate (2) has heat resistance and oxidation resistance; the bolt (1) is made of GH2132 high-temperature alloy; the lower base (4) and the upper base (3) both adopt T300 carbon cloth, so that the lower base (4) and the upper base (3) have heat insulation and flame retardant properties.
7. A fire bolt assembly according to claim 2, characterised in that the base plate (2) comprises: a floor upper plane (24);
a bottom plate outer circular surface (25) positioned at the periphery of the bottom plate upper plane (24);
a lower sole plate surface (26) located below the upper sole plate surface (24);
a bottom plate through hole (27) is arranged in the middle of the bottom plate upper plane (24), and the bottom plate through hole (27) is tightly sleeved with a bolt polish rod (11) of the bolt (1);
the bottom plate reinforcing ribs (28) are protruded on the upper plane (24) of the bottom plate, and the bottoms of the bottom plate reinforcing ribs (28) are grooves and penetrate through the bottom plate exhaust holes (29) on the upper plane (24) of the bottom plate.
8. The fire resistant bolt assembly and connection structure as set forth in claim 7, wherein: the bottom plate reinforcing ribs (28) are distributed at intervals; the bottom plate exhaust holes (29) are positioned between the two bottom plate reinforcing ribs (28).
9. A fire bolt assembly according to claim 2, characterised in that the upper base (3) comprises: the bottom surface of the upper base boss (31) is in contact and corresponds to the bottom surface of the triangular head (13) when being installed;
an upper base boss cylindrical surface (32) located on the periphery of the upper base boss (31);
an upper base exhaust hole (33) which is arranged in the non-center of the upper base boss (31) in a penetrating way and used for exhausting, and an upper base through hole (34) which is arranged in the center of the upper base boss (31) in a penetrating way and tightly sleeved with a bolt polish rod (11) of a bolt (1) in an interference way;
an organic whole extends last base upper surface (35) of going up base boss (31) periphery, goes up base upper surface (35) and forms the step with last base boss (31) on last base boss cylinder face (32), goes up base boss (31) and last base upper surface (35) and has last base concave station (36), goes up base concave station (36) and is used for cooperating with triangle head (13) bottom surface.
10. A connecting structure, characterized by comprising: an outer cylinder (91) of a lock nut of the self-locking nut (9) extends into a connecting through hole in a connected piece B (102), a bolt (1) extends into an inner threaded hole (92) of the self-locking nut (9) from the connecting through hole in the connected piece A (101) and is screwed with the inner threaded hole (92) of the self-locking nut (9), a heat conduction channel (103) is formed in the connected piece A (101) and the connected piece B (102), the bolt (1) and the self-locking nut (9) provide strength and rigidity to be located in the channel (103), when high-temperature fluid medium circulates in the channel (103) to form a high-temperature environment, the bolt (1), a bottom plate (2), a base (4) and an upper base (3) form a heat-insulating and flame-retardant bolt assembly, the bottom plate (2) of the flame-retardant bolt assembly is tightly contacted with the connected piece A (101) to block the connecting through hole in the connected piece A (101), the self-locking nut (9), a lining net (8), a heat insulation pad B (7), The flame-retardant nut assembly is formed by the heat insulation pad A (6) and the inner hexagonal sleeve cap (5), and the flange end face (93) of the self-locking nut (9) on the flame-retardant nut assembly is contacted with the bottom surface of the connected piece B (102) to plug the connecting through hole of the connected piece B (102).
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| 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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| 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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| CN114941649A true CN114941649A (en) | 2022-08-26 |
| CN114941649B CN114941649B (en) | 2023-06-23 |
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| CN202210547314.8A Active CN114941649B (en) | 2022-05-19 | 2022-05-19 | Flame-retardant bolt assembly and connecting structure |
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| Publication number | Publication date |
|---|---|
| CN114941649B (en) | 2023-06-23 |
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