CN113738070A - Heat preservation construction method and heat preservation structure for gaps of civil engineering refrigeration house - Google Patents
Heat preservation construction method and heat preservation structure for gaps of civil engineering refrigeration house Download PDFInfo
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- CN113738070A CN113738070A CN202111215724.4A CN202111215724A CN113738070A CN 113738070 A CN113738070 A CN 113738070A CN 202111215724 A CN202111215724 A CN 202111215724A CN 113738070 A CN113738070 A CN 113738070A
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- polyurethane
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- heat
- heat preservation
- insulating layer
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- 238000004321 preservation Methods 0.000 title claims abstract description 41
- 238000010276 construction Methods 0.000 title claims abstract description 24
- 238000005057 refrigeration Methods 0.000 title claims abstract description 13
- 229920002635 polyurethane Polymers 0.000 claims abstract description 157
- 239000004814 polyurethane Substances 0.000 claims abstract description 157
- 238000005192 partition Methods 0.000 claims abstract description 42
- 238000005507 spraying Methods 0.000 claims abstract description 35
- 238000005520 cutting process Methods 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 238000005187 foaming Methods 0.000 claims abstract description 7
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 239000006260 foam Substances 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 238000009413 insulation Methods 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 230000003014 reinforcing effect Effects 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 5
- 239000002994 raw material Substances 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 8
- 238000011065 in-situ storage Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
- 230000007547 defect Effects 0.000 description 5
- 238000005457 optimization Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000006549 dyspepsia Diseases 0.000 description 1
- 208000024798 heartburn Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/02—Implements for finishing work on buildings for applying plasticised masses to surfaces, e.g. plastering walls
- E04F21/06—Implements for applying plaster, insulating material, or the like
- E04F21/08—Mechanical implements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
- E04B1/7608—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only comprising a prefabricated insulating layer, disposed between two other layers or panels
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
- E04B1/762—Exterior insulation of exterior walls
Abstract
The invention discloses a heat preservation construction method and a heat preservation structure for a gap of a civil engineering refrigeration house, which relate to the technical field of refrigeration house heat preservation and comprise the following steps: cleaning the surfaces of two side walls of the gap; measuring the width of the gap, and spraying, foaming and cutting on site to form a polyurethane partition plate; installing a polyurethane partition plate at the bottom of the gap, and adopting polyurethane liquid to fill and bond the polyurethane partition plate and the wall surfaces on the two sides in situ; n layers of first polyurethane heat-insulating layers which are longitudinally arranged are poured and sprayed in the gap in a layered mode; and spraying second polyurethane heat-insulating layers which are transversely arranged along the wall surface of the civil wall body in the space between the tail ends of the upper side and the lower side of the civil wall body and the gap, wherein the thickness of each second polyurethane heat-insulating layer is smaller than the width of the gap. According to the invention, the polyurethane raw materials are adopted for layered pouring construction, so that the polyurethane liquid raw materials can be ensured to be fully spread in a limited space and then slowly molded, heat generated in the polyurethane curing process is fully released, the quality of a polyurethane finished product is ensured, and the national standard is met.
Description
Technical Field
The invention relates to the technical field of refrigeration house heat preservation, in particular to a heat preservation construction method and a heat preservation structure for a civil engineering refrigeration house gap.
Background
The polyurethane material at present has the advantages of light weight, low water absorption, good heat preservation effect and the like, and has become the mainstream heat preservation material used in the refrigeration house. The traditional method for the heat preservation construction of the civil engineering cold storage warehouse gap is to form a heat preservation layer by directly spraying the slab gap of a floor slab, however, the direct spraying has many disadvantages: firstly, because the space at the plate seam is limited, and the polyurethane foaming speed is high, generally 5-10 seconds, the non-uniform spraying of the heat-insulating layer is easily caused, so that gaps are generated in the heat-insulating layer, and the heat-insulating quality is influenced; secondly, because the space of the floor is limited, and the polyurethane is subjected to an exothermic reaction in the curing process, a large amount of heat can be released in a short time, and the heat is difficult to release quickly in a narrow space and is retained in the polyurethane, so that the polyurethane has serious quality problems such as 'heartburn'; thirdly, the floor slab cannot be sprayed in a layered mode by adopting equipment due to the narrow space, the free foaming can only be realized by full spraying, and various technical parameters, particularly volume weight, of the polyurethane formed by free foaming are difficult to meet the requirements of national standard, so that the quality of the polyurethane is influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the heat preservation construction method and the heat preservation structure for the gaps of the civil engineering refrigeration house, which have the advantages of good polyurethane finished product quality, high curing degree and good heat preservation effect.
The invention adopts the following technical scheme: a heat preservation construction method for a civil engineering refrigeration house gap comprises the following steps:
firstly, cleaning the surfaces of two side walls of a gap;
secondly, measuring the width of the gap, and forming a polyurethane partition plate by spraying, foaming and cutting on site according to the width;
thirdly, mounting the polyurethane partition board at the bottom of the gap, and adopting polyurethane liquid to fill and bond the polyurethane partition board and the two side wall surfaces on site;
fourthly, pouring and spraying N layers of first polyurethane heat-insulating layers which are longitudinally distributed in the gap in a layered manner;
and fifthly, spraying a second polyurethane heat-insulating layer which is transversely arranged along the wall surface of the civil engineering wall body in the space between the upper and lower ends of the civil engineering wall body and the gap, wherein the thickness of the second polyurethane heat-insulating layer is smaller than the width of the gap.
As an optimization scheme, the fourth step comprises the following steps:
spraying and coating the upper surface of the polyurethane partition plate to form a first polyurethane heat-insulating layer; curing the foam for more than or equal to 12 hours; cutting the first polyurethane heat-insulating layer after the curing is finished, and keeping the thickness of the first polyurethane heat-insulating layer to be less than or equal to 30 mm;
spraying and coating the upper surface of the first polyurethane heat-insulating layer to form a second first polyurethane heat-insulating layer; curing the foam for more than or equal to 12 hours; cutting the cured second polyurethane heat-insulating layer, and keeping the thickness of the second polyurethane heat-insulating layer less than or equal to 30 mm;
……
spraying and coating the upper surface of the (N-1) th first polyurethane heat-insulating layer to form an Nth first polyurethane heat-insulating layer; curing the foam for more than or equal to 12 hours; and cutting and curing the Nth first polyurethane heat-insulating layer, and keeping the thickness of the Nth first polyurethane heat-insulating layer less than or equal to 30 mm.
And as an optimization scheme, setting the ambient temperature to be 0-40 ℃ when the fourth step is carried out.
As an optimization scheme, the foam curing time of the polyurethane partition board is more than or equal to 2 hours.
As an optimized scheme, the thickness of the polyurethane partition plate is 20-30 mm.
As an optimization scheme, the distance between the bottom surface of the polyurethane partition plate and the bottom of the gap is 100mm, and the distance between the top surface of the Nth layer of the first polyurethane heat-insulation layer and the top of the gap is 50 mm.
As an optimization scheme, the method further comprises the following steps: and sixthly, using a steel wire reinforcing net to fully cover the upper surface of the first polyurethane heat-insulating layer on the topmost layer, the upper surface of the second polyurethane heat-insulating layer and the lower surface of the polyurethane partition plate.
As an optimized scheme, the mesh size of the steel wire reinforcing net is 40mm multiplied by 40mm, and the diameter of a steel wire is 3 mm.
The invention also provides a heat insulation structure at the gap of the civil engineering refrigerator, which comprises a polyurethane partition board, a plurality of layers of longitudinally arranged first polyurethane heat insulation layers arranged on the upper surface of the polyurethane partition board, a second polyurethane heat insulation layer transversely arranged between the upper surface of the first polyurethane heat insulation layer at the topmost layer and the upper and lower side ends of the civil engineering wall body, and steel wire reinforcing nets paved on the upper surface of the first polyurethane heat insulation layer at the topmost layer, the upper surface of the second polyurethane heat insulation layer and the lower surface of the polyurethane partition board.
Compared with the prior art, the invention has the advantages that:
according to the invention, the polyurethane raw materials are adopted for layered pouring construction, the reaction speed is low, the polyurethane liquid raw materials can be ensured to be fully spread in a limited space and then slowly molded, and the defect of hollowing in the interior is avoided; meanwhile, the thickness of each layer is 20-30mm, and heat generated in the polyurethane curing process can be fully released, so that the defect of internal burning is overcome, the quality of a polyurethane finished product is ensured, the requirements of 'technical code for cold storage spraying hard foam polyurethane heat preservation engineering' CECS498-2017 are met, and all technical parameters of the finished product polyurethane can completely meet the requirements of national specifications.
Drawings
FIG. 1 is a schematic diagram of a heat preservation structure at a gap of a civil engineering cold storage according to the invention;
the building comprises a civil wall body 1, a floor slab 2, a gap 3, a polyurethane partition plate 4, a first polyurethane heat-insulating layer 5, a second polyurethane heat-insulating layer 6 and a steel wire reinforcing net 7.
Detailed Description
Hereinafter, in order to facilitate the technical solution of the present invention for those skilled in the art to understand, further description will be made with reference to the accompanying drawings. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention.
In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. It may be evident, however, that one or more embodiments may be practiced without these specific details. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Below, for the insulation construction sketch map that exists gap department between civil engineering wall body 1 and floor 2, as shown in fig. 1, insulation construction includes polyurethane partition panel 4, sets up vertically arrange in a plurality of layers of polyurethane partition panel 4 upper surface first polyurethane heat preservation 5, transversely arrange be in civil engineering wall body 1's upper and lower both sides end with second polyurethane heat preservation 6 in the space between gap 3 and lay the steel wire reinforcing mesh 7 on 5 upper surface of first polyurethane heat preservation, second polyurethane heat preservation upper surface 6 and the lower surface of polyurethane partition panel 4 at the top layer.
The construction method of the heat insulation structure comprises the following steps of firstly, cleaning the surfaces of the two side walls of the gap 3, and ensuring that the wall surface has good adhesive force. Secondly, measuring the width of the gap 3, forming a polyurethane partition plate 4 on site through spraying, foaming and cutting according to the measured width, after the polyurethane partition plate 4 is cured for more than 2 hours, cutting the polyurethane partition plate 4, keeping the thickness of the polyurethane partition plate at 20-30mm, enabling the width of the polyurethane partition plate 4 to be slightly larger than the size of the gap 3, ensuring the firmness after the polyurethane partition plate is plugged into the gap 3 in the future, fixing the polyurethane partition plate 4 at a position 100mm away from the bottommost position of the gap 3 in the third step, and (3) adopting polyurethane liquid to fill and bond between the polyurethane partition plate 4 and the wall surfaces on the two sides on site, and fourthly, after bonding, filling and spraying N layers of longitudinally-arranged first polyurethane heat-insulating layers 5 in the gap 3 in a layered mode, wherein the filling and spraying thickness of each gun is controlled within 30mm, and after the single spraying is finished, the next filling and spraying can be carried out after the foam is cured for 12 hours until the distance from the top of the gap is 50 mm. The method comprises the following specific steps:
spraying and forming a first polyurethane heat-insulating layer 5 on the upper surface of the polyurethane partition plate 3, curing foam for more than or equal to 12 hours, cutting the cured first polyurethane heat-insulating layer, and keeping the thickness of the first polyurethane heat-insulating layer to be less than or equal to 30 mm;
spraying and forming a second first polyurethane heat-insulating layer on the upper surface of the first polyurethane heat-insulating layer, curing foam for more than or equal to 12 hours, cutting the cured second first polyurethane heat-insulating layer, and keeping the thickness of the second first polyurethane heat-insulating layer to be less than or equal to 30 mm;
……
and spraying and coating the upper surface of the (N-1) th first polyurethane heat-insulating layer to form an Nth first polyurethane heat-insulating layer, curing the foam for more than or equal to 12 hours, cutting the cured Nth first polyurethane heat-insulating layer, and keeping the thickness of the Nth first polyurethane heat-insulating layer to be less than or equal to 30 mm.
The size of N can be determined according to the field requirement, and in the embodiment, the total spraying thickness of the N first polyurethane heat-insulating layers 5 is not more than 200 mm.
And fifthly, after the layered filling and spraying are finished, transversely-arranged second polyurethane heat-insulating layers 6 are sprayed along the wall surfaces of the civil engineering wall 1 in the space between the upper and lower ends of the civil engineering wall 1 and the gap 3, specifically, the second polyurethane heat-insulating layers 6 are sprayed between the upper and lower ends of the civil engineering wall 1 and the top surfaces of the Nth first polyurethane heat-insulating layers 5 and the bottom surfaces of the polyurethane partition plates 4, and the thickness of the second polyurethane heat-insulating layers 6 is ensured to be smaller than the width of the gap 3.
In this embodiment, be fixed in apart from gap 3 bottommost position 100mm position department with polyurethane partition panel 4 to adopt the polyurethane material to bond the partition panel, the effect of this step is the place of guaranteeing that the later stage pours the polyurethane raw materials and has the support, otherwise the polyurethane raw materials of liquid pour the back do not have the power strong point and can directly flow out and cause extravagant and unnecessary wall body pollution. The first polyurethane heat preservation 5 of every layer that adopts the shaping formation of layering spraying, its thickness is 20 ~ 30mm, and its effect is in time to release fast and stays there is the inside heat of polyurethane, avoids polyurethane to appear "burning heart" serious quality problems such as swell to guarantee polyurethane heat preservation finished product quality. After the foam is cured for 12 hours after the single spraying, the next pouring and spraying can be carried out, the effect of the spraying is to ensure the complete curing of the polyurethane, and only if the polyurethane is completely cured, all technical parameters of the polyurethane can meet the national standard requirements.
As a construction improvement scheme of this embodiment, when carrying out layering perfusion spraying and forming first polyurethane heat preservation 5, keep ambient temperature between 0 ~ 40 ℃, its effect is that the activity of polyurethane raw materials is stronger in the work progress between this temperature to make it can abundant reaction, thereby guarantee the finished product quality of polyurethane, in addition, when the temperature is too low, the adhesion of polyurethane and wall surface is poor, takes place to break away from easily.
As another construction improvement scheme of this embodiment, after the second polyurethane insulation layer 6 is sprayed, the steel wire reinforcing mesh 7 is needed to fully cover the upper surface of the topmost first polyurethane insulation layer 5, the upper surface of the second polyurethane insulation layer 6 and the lower surface of the polyurethane partition plate 4, because the polyurethane shrinks due to cooling in the low-temperature refrigerator, and shrinkage stress is generated due to shrinkage, and the steel wire reinforcing mesh 7 can share the shrinkage stress, so that the service life of the polyurethane protection layer can be prolonged. In this embodiment, the mesh size of the steel wire reinforcing mesh 7 is 40mm × 40mm, and the diameter of the steel wire is 3 mm.
According to the invention, the polyurethane raw materials are adopted for layered pouring construction, the reaction speed is low, the polyurethane liquid raw materials can be ensured to be fully spread in a limited space and then slowly molded, and the defect of hollowing in the interior is avoided; meanwhile, the thickness of each layer is 20-30mm, so that heat generated in the polyurethane curing process can be fully released, the defect of internal burning is overcome, the quality of a polyurethane finished product is ensured, the requirements of 'technical code for cold storage spraying hard foam polyurethane heat preservation engineering' CECS498-2017 are met, and all technical parameters of the finished product polyurethane can completely meet the requirements of national specifications.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (9)
1. A civil engineering freezer gap heat preservation construction method is characterized by comprising the following steps:
firstly, cleaning the surfaces of two side walls of a gap;
secondly, measuring the width of the gap, and forming a polyurethane partition plate by spraying, foaming and cutting on site according to the width;
thirdly, mounting the polyurethane partition board at the bottom of the gap, and adopting polyurethane liquid to fill and bond the polyurethane partition board and the two side wall surfaces on site;
fourthly, pouring and spraying N layers of first polyurethane heat-insulating layers which are longitudinally distributed in the gap in a layered manner;
and fifthly, spraying second polyurethane heat-insulating layers which are transversely arranged along the wall surfaces of the civil wall body in the space between the upper and lower ends of the civil wall body and the gap, wherein the thickness of each second polyurethane heat-insulating layer is smaller than the width of the gap.
2. The civil engineering freezer gap heat preservation construction method according to claim 1, characterized in that the fourth step comprises the following steps:
spraying and forming a first polyurethane heat-insulating layer on the upper surface of the polyurethane partition plate, curing foam for more than or equal to 12 hours, cutting the cured first polyurethane heat-insulating layer, and keeping the thickness of the first polyurethane heat-insulating layer to be less than or equal to 30 mm;
spraying and coating the upper surface of the first polyurethane heat-insulating layer to form a second polyurethane heat-insulating layer, curing the foam for more than or equal to 12 hours, cutting the cured second polyurethane heat-insulating layer, and keeping the thickness of the second polyurethane heat-insulating layer to be less than or equal to 30 mm;
……
and spraying and coating the upper surface of the (N-1) th first polyurethane heat-insulating layer to form an Nth first polyurethane heat-insulating layer, curing the foam for more than or equal to 12 hours, cutting the cured Nth first polyurethane heat-insulating layer, and keeping the thickness of the Nth first polyurethane heat-insulating layer to be less than or equal to 30 mm.
3. The civil engineering freezer gap heat preservation construction method according to claim 2, characterized in that, in the fourth step, the setting ambient temperature is 0-40 ℃.
4. The heat preservation construction method for the gaps of the civil engineering and refrigeration houses according to claim 1, wherein the foam curing time of the polyurethane partition panel is not less than 2 hours.
5. The heat preservation construction method for the gaps of the civil engineering and refrigeration house according to claim 4, wherein the thickness of the polyurethane partition plate is 20-30 mm.
6. The construction method for heat preservation at the gap of the civil engineering and refrigeration house according to claim 5, wherein the distance between the bottom surface of the polyurethane partition board and the bottom of the gap is 100mm, and the distance between the top surface of the first polyurethane heat preservation layer on the Nth layer and the top of the gap is 50 mm.
7. The civil engineering freezer gap heat preservation construction method according to claim 1, characterized in that the steps further include: and sixthly, using a steel wire reinforcing net to fully cover the upper surface of the first polyurethane heat-insulating layer on the topmost layer, the upper surface of the second polyurethane heat-insulating layer and the lower surface of the polyurethane partition plate.
8. The heat preservation construction method for the gaps of the civil engineering and refrigeration storage according to claim 7, wherein the mesh size of the steel wire reinforcing mesh is 40mm x 40mm, and the diameter of the steel wire is 3 mm.
9. The utility model provides a civil engineering freezer gap department insulation construction, its characterized in that is in including polyurethane partition panel, setting a plurality of layers of vertical first polyurethane heat preservation of arranging of polyurethane partition panel upper surface, transversely arrange the civil engineering wall body the upper and lower both sides end with second polyurethane heat preservation in the space between the gap and lay the first polyurethane heat preservation upper surface of top layer second polyurethane heat preservation upper surface and the steel wire reinforcing mesh on the lower surface of polyurethane partition panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111215724.4A CN113738070A (en) | 2021-10-19 | 2021-10-19 | Heat preservation construction method and heat preservation structure for gaps of civil engineering refrigeration house |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111215724.4A CN113738070A (en) | 2021-10-19 | 2021-10-19 | Heat preservation construction method and heat preservation structure for gaps of civil engineering refrigeration house |
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| CN113738070A true CN113738070A (en) | 2021-12-03 |
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| CN202111215724.4A Pending CN113738070A (en) | 2021-10-19 | 2021-10-19 | Heat preservation construction method and heat preservation structure for gaps of civil engineering refrigeration house |
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2021
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| JPH06299617A (en) * | 1993-04-12 | 1994-10-25 | Nissin Kogyo Kk | Thermal insulation structure for cold reserving room |
| DE102004033607A1 (en) * | 2004-07-12 | 2006-02-16 | Saint-Gobain Isover G+H Ag | Thermal insulation system for clam shell exterior walls |
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Application publication date: 20211203 |
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