CN212708379U - Composite heat insulation material and vulcanizing chamber heat preservation cover made of same - Google Patents
Composite heat insulation material and vulcanizing chamber heat preservation cover made of same Download PDFInfo
- Publication number
- CN212708379U CN212708379U CN202021308866.6U CN202021308866U CN212708379U CN 212708379 U CN212708379 U CN 212708379U CN 202021308866 U CN202021308866 U CN 202021308866U CN 212708379 U CN212708379 U CN 212708379U
- Authority
- CN
- China
- Prior art keywords
- soaking
- heat
- connecting bolt
- support frame
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 32
- 238000004321 preservation Methods 0.000 title claims abstract description 30
- 239000012774 insulation material Substances 0.000 title abstract description 15
- 238000002791 soaking Methods 0.000 claims abstract description 64
- 239000010410 layer Substances 0.000 claims abstract description 34
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 239000003063 flame retardant Substances 0.000 claims abstract description 18
- 238000004073 vulcanization Methods 0.000 claims abstract description 15
- 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 claims abstract description 13
- 239000011241 protective layer Substances 0.000 claims abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000741 silica gel Substances 0.000 claims abstract description 10
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 10
- 239000003365 glass fiber Substances 0.000 claims abstract description 9
- 239000004698 Polyethylene Substances 0.000 claims abstract description 8
- -1 polyethylene Polymers 0.000 claims abstract description 8
- 229920000573 polyethylene Polymers 0.000 claims abstract description 8
- 238000009413 insulation Methods 0.000 claims description 18
- 239000011810 insulating material Substances 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 5
- 239000006260 foam Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000007142 ring opening reaction Methods 0.000 claims description 2
- 238000013329 compounding Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 10
- 239000011248 coating agent Substances 0.000 abstract description 8
- 238000000576 coating method Methods 0.000 abstract description 8
- 150000001875 compounds Chemical class 0.000 abstract description 7
- 238000001467 acupuncture Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000007423 decrease Effects 0.000 abstract 1
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Landscapes
- Thermal Insulation (AREA)
Abstract
The utility model provides a compound thermal insulation material and use vulcanization room heat preservation cover of this material preparation, compound thermal insulation material are including soaking supporting layer, high temperature resistant flame retardant coating, thermal-insulated heat preservation and the protective layer that connects gradually, and the soaking supporting layer comprises thickness 1-3 mm's steel sheet, the array is equipped with the soaking hole on the steel sheet, and the high temperature resistant flame retardant coating comprises the thick temperature resistant glass fiber acupuncture felt more than 700 ℃ of 2-6mm, thermal-insulated heat preservation comprises the thick temperature resistant polyethylene obturator cystosepiment more than 90 ℃ of 5-20mm, the protective layer comprises the fire-retardant silica gel that thickness is 0.1-1 mm. The beneficial effects of the utility model are that owing to adopt above-mentioned technical scheme, composite heat insulation material's heat preservation is effectual, stable in structure to having the soaking effect, can effectively avoiding because local overheat leads to composite heat insulation material's life-span decline.
Description
Technical Field
The utility model relates to a heat preservation component technical field, specifically a composite heat insulation material and use vulcanization room heat preservation cover of this material preparation.
Background
The vulcanization process is a process of adding a vulcanizing agent, an accelerant and other crosslinking aids into rubber and converting linear macromolecules into a three-dimensional grid structure under certain temperature and pressure conditions. In the prior art, a flat-plate vulcanizing machine and a circular cylinder vulcanizing machine are mainly adopted as vulcanizing equipment. The thermal equipment of the vulcanization process is usually arranged at a vulcanization mold, and the heating mode of a vulcanizing machine usually adopts a water vapor, compressed air, heat transfer oil or electric heating mode to meet the temperature requirement in the vulcanization process.
The vulcanization chamber is at the in-process of vulcanizing, owing to need keep the uniform temperature, its outside needs to set up the heat preservation cover, and the heat preservation cover of prior art adopts the steel sheet reel usually, and double-deck steel sheet reel both ends welding or with screw fixed seal, inside loads insulation material. The equipment runs for a long time, the temperature rises too high, the heat insulation material in the heat insulation cover and in direct contact with the stainless steel plate is prone to collapse or hollow, especially when the equipment has heat accumulation, local heat rises, the heat insulation material is prone to collapse at high temperature, and the whole heat insulation cover loses effect.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a composite heat insulating material, the soaking that keeps warm is effectual, and is longe-lived, especially is fit for the thermal-insulated heat preservation of vulcanizer.
The technical scheme of the utility model is that:
the composite heat insulation material comprises a soaking supporting layer, a high-temperature-resistant fireproof layer, a heat insulation layer and a protective layer which are sequentially connected, wherein the soaking supporting layer is composed of steel plates with the thickness of 1-3mm, soaking holes are formed in the steel plates in an array mode, the high-temperature-resistant fireproof layer is composed of glass fiber needled felts with the thickness of 2-6mm and the temperature resistance of more than 700 ℃, the heat insulation layer is composed of polyethylene closed-cell foam plates with the thickness of 5-20mm and the temperature resistance of more than 90 ℃, and the protective layer is composed of flame-retardant silica gel with the thickness of 0.1-1 mm.
Furthermore, the composite heat-insulating material is also provided with a connecting bolt, one end of the connecting bolt is vertically connected with the soaking supporting layer, the other end of the connecting bolt is conical, V-shaped mark folding grooves are arranged on the side wall of the conical end of the connecting bolt at intervals, and the included angle between the two groove surfaces of each mark folding groove is 60-120 degrees.
The utility model provides a vulcanization room heat preservation cover, includes the soaking support frame of tube-shape and overlaps the compound thermal-insulated sleeve in the soaking support frame outside, and the soaking support frame comprises the steel sheet that thickness is 1-3mm, the array is equipped with the soaking hole on the steel sheet, compound thermal-insulated sleeve is formed by inlayer and skin complex, and the inlayer comprises the thick temperature resistant glass fiber acupuncture felt more than 700 ℃ of 2-6mm, and the skin comprises the thick temperature resistant polyethylene obturator cystosepiment more than 90 ℃ of 5-20mm, and compound thermal-insulated sleeve's inside wall, lateral wall, up end and lower terminal surface are wrapped up by fire-retardant silica gel.
Further, the lateral wall of soaking support frame is equipped with the opening along soaking support frame axis direction, the both ends of vulcanizing chamber heat preservation cover are equipped with the locking lid, the locking lid includes the annular base plate of open-ended circle, be equipped with the first annular retaining ring of coaxial and perpendicular to base plate, second annular retaining ring and third annular retaining ring on the base plate, first annular retaining ring, second annular retaining ring and base plate form with soaking support frame tip matched with ring channel, be equipped with the locking mechanism that draws the opening part both sides to one side on the lateral wall of third annular retaining ring opening part.
Furthermore, the vulcanization chamber heat preservation cover is also provided with a connecting bolt penetrating through the composite heat insulation sleeve, one end of the connecting bolt is connected with the soaking support frame, the other end of the connecting bolt is conical, V-shaped mark folding grooves are arranged on the side wall of the conical end of the connecting bolt at intervals, and the included angle between two groove surfaces of each mark folding groove is 60-120 degrees.
The utility model has the advantages and positive effects that: by adopting the technical scheme, the composite heat-insulating material has good heat-insulating effect and stable structure, has a soaking effect, and can effectively avoid the service life reduction of the composite heat-insulating material caused by local overheating.
Drawings
FIG. 1 is a schematic structural view of the composite heat insulating material of the present invention
FIG. 2 is a schematic view of the structure of the connection bolt
FIG. 3 is a schematic axial sectional view of the insulating cover of the vulcanizing chamber in example 2
FIG. 4 is a schematic axial sectional view of a heat-insulating cover for a vulcanization chamber in example 3
FIG. 5 is a top view of the locking cap
FIG. 6 is a schematic view showing the structure of a soaking frame in example 3
In the figure:
1. a soaking supporting layer 2, a high temperature resistant fireproof layer 3 and a heat insulation layer
4. Protective layer 5, connecting bolt 6 and soaking support frame
8. Flame-retardant silica gel 9, locking cover 51 and crease groove
71. Inner layer 72, outer layer 91, first annular retainer ring
92. Second annular retainer ring 93, third annular retainer ring 94 and locking mechanism
Detailed Description
Example 1
As shown in fig. 1 and 2, the present invention
The utility model provides a composite heat insulation material, includes soaking supporting layer 1, high temperature resistant flame retardant coating 2, thermal-insulated heat preservation 3 and protective layer 4 that connect gradually, and soaking supporting layer 2 comprises the steel sheet that thickness is 2mm, the array is equipped with the soaking hole on the steel sheet, and high temperature resistant flame retardant coating 2 comprises the thick temperature resistant glass fiber acupuncture felt more than 700 ℃ of 5mm, thermal-insulated heat preservation 3 comprises the thick temperature resistant polyethylene obturator cystosepiment more than 90 ℃ of 15mm, protective layer 4 comprises the fire-retardant silica gel that thickness is 0.2 mm.
The steel plate is a stainless steel plate.
Thermal-insulated heat preservation 3 is the primary structure who plays thermal-insulated heat preservation effect among the composite heat insulation material, and soaking supporting layer 1 still has the soaking effect except playing the supporting skeleton function, and its self heat conduction effect of stainless steel's soaking supporting layer is good, can prevent local high temperature to heat conduction all around, prevents local high temperature, causes thermal-insulated heat preservation 3's destruction, improves composite heat insulation material's whole life-span.
The high temperature resistant flame retardant coating 2 of glass fiber acupuncture felt layer material has played the cushioning effect between soaking supporting layer 1 and thermal-insulated heat preservation 3, further supplements the soaking effect of soaking supporting layer 1, prevents that local high temperature from will insulating against heat 3 damages of heat preservation.
The composite heat-insulating material is also provided with a connecting bolt 5, one end of the connecting bolt 5 is vertically connected with the soaking support layer 1, the other end of the connecting bolt is conical, V-shaped crease mark grooves 51 are arranged on the side wall of the conical end of the connecting bolt at intervals, and the included angle between two groove surfaces of the crease mark grooves 51 is 90 degrees.
The toper end of connecting bolt 5 runs through high temperature resistant flame retardant coating 2, thermal-insulated heat preservation 3 and protective layer 4 to buckle in the outside of protective layer 4, form L shape, the connecting bolt 5 of L shape is with high temperature resistant flame retardant coating 2, thermal-insulated heat preservation 3 and the stable fixing of protective layer 4 on soaking supporting layer 1, prevents that composite heat insulation material layering is discrete.
The crease groove 51 that the interval was equipped with on the lateral wall of the connecting bolt toper end of connecting bolt 5 is convenient for when production, will connect bolt 5 and roll over into the L shape, and different crease grooves 51 can be selected according to the actual thickness of high temperature resistant flame retardant coating 2 and thermal-insulated heat preservation 3 in spaced crease groove 51 and buckle to the toper end that makes connecting bolt 5 can hug closely in protective layer 4, thereby realizes stable fixed.
Example 2
As shown in fig. 3
The utility model provides a vulcanization room heat preservation cover, includes soaking support frame 6 and the thermal-insulated sleeve of complex of cover in the 6 outsides of soaking support frame of tube-shape, and the soaking support frame comprises the steel sheet that thickness is 2mm, the array is equipped with the soaking hole on the steel sheet, complex thermal-insulated sleeve is formed by inlayer 71 and outer 72 complex, and inlayer 71 comprises the glass fiber acupuncture felt more than the thick temperature resistant 700 ℃ of 5mm, and outer 72 comprises the polyethylene obturator cystosepiment more than the thick temperature resistant 90 ℃ of 15mm, and compound thermal-insulated sleeve's inside wall, lateral wall, up end and lower terminal surface are wrapped up by fire-retardant silica gel 8.
The flame-retardant silica gel wraps the composite heat insulation sleeve integrally and hermetically, and because the steam exists in the working environment of the vulcanization chamber, the flame-retardant silica gel can prevent the steam from contacting with the composite heat insulation sleeve, and after the composite heat insulation sleeve absorbs water, the heat conductivity can be improved, so that the integral heat insulation effect of the heat insulation cover of the vulcanization chamber is reduced.
Reinforcing rings 61 are arranged on the outer sides of two ends of the soaking support frame 6, and the reinforcing rings 61 are welded on the outer sides of the ends of the soaking support frame 6 after being bent by stainless steel square pipes. The reinforcing ring 61 can improve the radial pressure resistance of the soaking support frame 6, so that the overall stability of the heat-insulating cover of the vulcanizing chamber is improved.
The sulfuration chamber heat preservation cover is further provided with a connecting bolt 5 penetrating through the composite heat insulation sleeve, one end of the connecting bolt 5 is connected with the soaking support frame 6, the other end of the connecting bolt is conical, V-shaped crease mark grooves 51 are arranged on the side wall of the conical end of the connecting bolt at intervals, and an included angle between two groove faces of the crease mark grooves 51 is 90 degrees.
Example 3
As shown in fig. 4, 5 and 6
The utility model provides a vulcanization room heat preservation cover, includes soaking support frame 6 and the thermal-insulated sleeve of complex of cover in the 6 outsides of soaking support frame of tube-shape, and the soaking support frame comprises the steel sheet that thickness is 2mm, the array is equipped with the soaking hole on the steel sheet, complex thermal-insulated sleeve is formed by inlayer 71 and outer 72 complex, and inlayer 71 comprises the glass fiber acupuncture felt more than the thick temperature resistant 700 ℃ of 5mm, and outer 72 comprises the polyethylene obturator cystosepiment more than the thick temperature resistant 90 ℃ of 15mm, and compound thermal-insulated sleeve's inside wall, lateral wall, up end and lower terminal surface are wrapped up by fire-retardant silica gel.
The lateral wall of soaking support frame 6 is equipped with the opening along 6 axis directions of soaking support frame, the both ends of vulcanizing chamber heat preservation cover are equipped with locking lid 9, locking lid 9 includes the annular base plate of open-ended circle, be equipped with the first annular retaining ring 91 of coaxial and perpendicular to base plate, second annular retaining ring 92 and third annular retaining ring 93 on the base plate, first annular retaining ring 91, second annular retaining ring 92 and base plate form and 6 tip matched with ring channel of soaking support frame, be equipped with on the lateral wall of third annular retaining ring 93 opening part and draw the locking mechanism 94 of opening part both sides to one side.
The soaking support 6 is in a cylinder shape with an opening on the side wall, and the opening of the soaking support 9 is matched with the opening of the locking cover substrate. An annular groove formed by a first annular retainer ring 91 and a second annular retainer ring 92 of the locking cover 9 is clamped at the end part of the soaking support frame 6; the annular grooves formed by the second annular retainer ring 92 and the third annular retainer ring 93 are clamped at the end part of the composite heat insulation sleeve.
The locking mechanism 94 is a limiting ring and a nut which are respectively arranged on the outer side walls of two sides of the opening of the third annular retainer ring 93, the inner diameter of the limiting ring is larger than the outer diameter of a bolt screw and is smaller than the outer diameter of a nut, the bolt penetrates through the limiting ring and then is matched with the nut, and two sides of the opening of the third annular retainer ring 93 are oppositely drawn close through screwing between the bolt and the nut.
The open locking cover 9 hoops the composite heat insulation sleeve on the soaking support frame 6.
The soaking support frame 6 is also open, and the diameter of the open soaking support frame 6 is reduced under the locking action of the locking cover 9, so that the whole vulcanizing machine heat-insulating cover is hooped outside the vulcanizing chamber.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.
Claims (5)
1. A composite heat insulating material is characterized in that: the heat-insulating and heat-preserving composite plate comprises a heat-soaking supporting layer, a high-temperature-resistant fireproof layer, a heat-insulating layer and a protective layer which are sequentially connected, wherein the heat-soaking supporting layer is composed of steel plates with the thickness of 1-3mm, heat-equalizing holes are formed in the steel plates in an array mode, the high-temperature-resistant fireproof layer is composed of glass fiber needled felts with the thickness of 2-6mm and the temperature resistance of more than 700 ℃, the heat-insulating and heat-preserving layer is composed of polyethylene closed-cell foam plates with the thickness of 5-20mm and the temperature resistance of more than 90 ℃, and the protective layer is composed.
2. The composite insulating material of claim 1, wherein: the composite heat-insulating material is also provided with a connecting bolt, one end of the connecting bolt is vertically connected with the soaking supporting layer, the other end of the connecting bolt is conical, V-shaped mark folding grooves are arranged on the side wall of the conical end of the connecting bolt at intervals, and the included angle between two groove surfaces of each mark folding groove is 60-120 degrees.
3. The utility model provides a vulcanization room heat preservation cover which characterized in that: the composite heat insulation sleeve comprises a cylindrical soaking support frame and a composite heat insulation sleeve sleeved outside the soaking support frame, wherein the soaking support frame is composed of a steel plate with the thickness of 1-3mm, the array is provided with soaking holes on the steel plate, the composite heat insulation sleeve is formed by compounding an inner layer and an outer layer, the inner layer is composed of a 2-6mm thick glass fiber needled felt resistant to temperature above 700 ℃, the outer layer is composed of a 5-20mm thick polyethylene closed-cell foam board resistant to temperature above 90 ℃, and the inner side wall, the outer side wall, the upper end face and the lower end face of the composite heat insulation sleeve are wrapped by flame-retardant silica gel.
4. The curing chamber heat shield of claim 3, wherein: the lateral wall of soaking support frame is equipped with the opening along soaking support frame axis direction, the both ends of vulcanizing chamber heat preservation cover are equipped with the locking lid, the locking lid includes the annular base plate of open-ended circle, be equipped with the first annular retaining ring of coaxial and perpendicular to base plate, second annular retaining ring and third annular retaining ring on the base plate, first annular retaining ring, second annular retaining ring and base plate form with soaking support frame tip matched with ring channel, be equipped with the locking mechanism that draws the opening part both sides to each other on the lateral wall of third annular retaining ring opening part.
5. The curing chamber heat shield of claim 3, wherein: the vulcanizing chamber heat-insulating cover is also provided with a connecting bolt penetrating through the composite heat-insulating sleeve, one end of the connecting bolt is connected with the soaking support frame, the other end of the connecting bolt is conical, V-shaped mark folding grooves are arranged on the side wall of the conical end of the connecting bolt at intervals, and the included angle between two groove surfaces of each mark folding groove is 60-120 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021308866.6U CN212708379U (en) | 2020-07-07 | 2020-07-07 | Composite heat insulation material and vulcanizing chamber heat preservation cover made of same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021308866.6U CN212708379U (en) | 2020-07-07 | 2020-07-07 | Composite heat insulation material and vulcanizing chamber heat preservation cover made of same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212708379U true CN212708379U (en) | 2021-03-16 |
Family
ID=74965249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021308866.6U Expired - Fee Related CN212708379U (en) | 2020-07-07 | 2020-07-07 | Composite heat insulation material and vulcanizing chamber heat preservation cover made of same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212708379U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113147117A (en) * | 2021-05-10 | 2021-07-23 | 苏州普科环境技术有限公司 | Multilayer heat insulation cover and preparation method thereof |
-
2020
- 2020-07-07 CN CN202021308866.6U patent/CN212708379U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113147117A (en) * | 2021-05-10 | 2021-07-23 | 苏州普科环境技术有限公司 | Multilayer heat insulation cover and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212708379U (en) | Composite heat insulation material and vulcanizing chamber heat preservation cover made of same | |
| CN109723937A (en) | The prefabricated aerial composite vapor insulating tube of one kind and its manufacturing method | |
| CN112728224A (en) | Cross-cabin sealing structure and equipment | |
| CN206600570U (en) | A kind of carbon felt heat insulation loop | |
| CN112046955A (en) | Tank container | |
| CN210567002U (en) | Self-heat-preservation pipe of pipeline heat-preservation system | |
| CN214465323U (en) | Novel carbon monoxide single tower fixed knot constructs | |
| CN204852785U (en) | Removable tube compound incubation cold insulation device | |
| CN213353814U (en) | Epoxy resin insulation board | |
| CN206072542U (en) | A kind of two-way clamping coolant Water pipe bracket and mounting structure | |
| CN208153966U (en) | A kind of polyurethane heat-insulation steel pipe | |
| CN221097945U (en) | Heat preservation and corrosion prevention structure | |
| CN111853372A (en) | Furnace bottom wall-penetrating expansion joint | |
| CN218671107U (en) | High temperature resistant pipeline expansion joint | |
| CN217081847U (en) | Rubber sphere compensator | |
| CN216078847U (en) | Trachea protective sheath that insulates against heat | |
| CN210567006U (en) | Novel internal sliding steel sleeve steel direct-buried heat-insulation pipe | |
| CN217177737U (en) | Sandwich heat-insulation steel pipe structure | |
| CN215488391U (en) | Heat-insulating and energy-saving pipeline structure | |
| CN213512469U (en) | Equipment trachea protection device | |
| CN219639692U (en) | Prefabricated overhead heat-insulating pipe and prefabricated directly-buried heat-insulating pipe | |
| CN215860388U (en) | Insulation structure of crankcase ventilation pipeline | |
| CN207112226U (en) | A kind of New hot oil line | |
| CN216447572U (en) | High-temperature-resistant heat-insulating pipe | |
| CN220566868U (en) | Steel bushing steel steam heat preservation structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210316 |