CN111185993A - Production process of civil air defense door with steel door leaf - Google Patents
Production process of civil air defense door with steel door leaf Download PDFInfo
- Publication number
- CN111185993A CN111185993A CN202010002249.1A CN202010002249A CN111185993A CN 111185993 A CN111185993 A CN 111185993A CN 202010002249 A CN202010002249 A CN 202010002249A CN 111185993 A CN111185993 A CN 111185993A
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- Prior art keywords
- concrete
- frame
- welding
- panel
- heating net
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/04—Producing shaped prefabricated articles from the material by tamping or ramming
- B28B1/045—Producing shaped prefabricated articles from the material by tamping or ramming combined with vibrating or jolting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F27/00—Making wire network, i.e. wire nets
- B21F27/12—Making special types or portions of network by methods or means specially adapted therefor
- B21F27/20—Making special types or portions of network by methods or means specially adapted therefor of plaster-carrying network
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/29—Producing shaped prefabricated articles from the material by profiling or strickling the material in open moulds or on moulding surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/245—Curing concrete articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0029—Moulds or moulding surfaces not covered by B28B7/0058 - B28B7/36 and B28B7/40 - B28B7/465, e.g. moulds assembled from several parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0029—Moulds or moulding surfaces not covered by B28B7/0058 - B28B7/36 and B28B7/40 - B28B7/465, e.g. moulds assembled from several parts
- B28B7/0032—Moulding tables or similar mainly horizontal moulding surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/36—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article
- B28B7/364—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article of plastic material or rubber
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
- E06B3/70—Door leaves
- E06B3/72—Door leaves consisting of frame and panels, e.g. of raised panel type
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
- E06B3/70—Door leaves
- E06B3/7015—Door leaves characterised by the filling between two external panels
- E06B2003/7028—Door leaves characterised by the filling between two external panels of cementituous type, e.g. concrete
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a production process of a civil air defense door with a steel door leaf, which relates to the technical field of civil air defense door production and solves the problem that a frame and a door plate are easily rusted in the concrete curing process in the existing civil air defense door production, and the technical scheme is characterized by comprising the following steps: a. blanking; b. straightening; c. assembling a frame; d. assembling the panel; e. welding a reinforcement cage; f. welding a reinforcement cage; g. building a pouring platform; h. spraying a perchloro-ethylene resin plastic solution; i. pouring concrete; j. curing the concrete; k. welding the panel; welding out the frame earlier, the one deck perchloro vinyl resin plastic solution of even spraying on the frame, then carry out the pouring and the maintenance of concrete again, the film that forms after the drying through perchloro vinyl resin plastic solution comes isolated steam for be difficult to cause the corrosion to the frame in the middle of the maintenance process, after the maintenance is accomplished, carry out the welding of panel again, make the panel also difficult to the corrosion.
Description
Technical Field
The invention relates to the technical field of civil air defense door production, in particular to a production process of a civil air defense door with a steel door leaf.
Background
The civil air defense door is the door of people's protection engineering access & exit, because the special service environment of civil air defense door, the impact resistance and the structural strength of civil air defense door all have higher requirement, and the requirement of civil air defense door anti-impact property and structural strength is satisfied through the collocation of steel construction and concrete to current civil air defense door mostly.
The existing civil air defense door is in the middle of the production process, firstly, frames of four sides of the civil air defense door are welded and built through steel plates, then reinforcing ribs and reinforcing steel plates are welded in the middle of the frames of the door, finally, two panels of the door are welded on the frames, finally, concrete is poured into the door, and then the maintenance of the concrete is carried out. Need provide sufficient temperature and humidity for the concrete when concrete maintenance, but because concrete placement causes the corrosion of frame and door plant easily in the middle of the process of carrying out the maintenance between the two panels, influences the structural strength of later stage people's air defense door.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a production process of a civil air defense door with a steel door leaf, which comprises the steps of welding a frame, uniformly spraying a layer of perchloro-ethylene resin plastic solution on the frame, placing the frame on a pouring base, pouring and curing concrete, and isolating water vapor through a film formed after the perchloro-ethylene resin plastic solution is dried, so that the frame is not easy to corrode in the curing process, and welding a panel after the concrete curing is finished, so that the panel is not easy to corrode due to the curing, and the structural strength of the civil air defense door in the later period is not easy to influence.
In order to achieve the purpose, the invention provides the following technical scheme: a production process of a civil air defense door with a steel door leaf comprises the following steps:
a. blanking: shearing and blanking plates and the like according to design requirements;
b. straightening: straightening and leveling the plate to keep the plate flat;
c. assembling a frame: establishing an assembly platform, horizontally arranging the top of the assembly platform, welding the plates forming the frame together on the assembly platform, and after welding is finished, clearly polishing welding slag at the welding position and flattening the welding position by a grinding wheel;
d. assembling the panel: welding a plurality of plates of the assembled panel to form a complete panel;
e. welding a reinforcement cage: welding the steel bars into two steel bar cages;
f. welding a reinforcement cage: welding two reinforcement cages in the frame, wherein the two reinforcement cages are respectively welded on two sides of the frame close to the two panels;
g. building a pouring platform: building a pouring platform;
h. spraying a perchloro-vinyl resin plastic solution: uniformly spraying a layer of perchloro-ethylene resin plastic solution on the outer side of the frame and the outer side of the reinforcement cage, and carrying out the next operation after the perchloro-ethylene resin plastic solution is dried;
i. pouring concrete: placing a frame on the top of an insulating heat-conducting plate, closely attaching the bottom of the frame and the top of the insulating heat-conducting plate together, then pouring concrete into the frame, ensuring the compactness of the concrete in the pouring process in a vibrator vibrating mode, trowelling the top of the concrete through a scraper after the concrete is poured, spraying a layer of perchloro-vinyl resin plastic solution on the top of the concrete after trowelling, and carrying out the next operation after the perchloro-vinyl resin plastic solution is dried;
j. concrete curing: after the concrete pouring is finished, curing the concrete;
k. panel welding: take off the insulating heat-conducting plate at concrete top and demolish two fixed sheathes on the frame, then polish the junction of frame and fixed sheathes and level, later weld the panel in the frame both sides.
Through adopting above-mentioned technical scheme, weld out the frame earlier, then even spraying one deck perchloro ethylene resin plastic solution on the frame, then place the frame on the pouring base again, carry out the pouring and the maintenance of concrete, the film that forms through the drying back of perchloro ethylene resin plastic solution completely cuts off the steam, make difficult to cause the corrosion to the frame among the curing process, after the concrete maintenance is accomplished, carry out the welding of panel again, make the panel also difficult because the maintenance and corrosion, thereby be difficult to influence the structural strength of later stage people's air defense door.
The invention is further configured to: in the step a, after blanking, the surface of the plate is marked, and the plate is classified and stacked according to panel materials, frame materials and reinforcement cage materials.
Through adopting above-mentioned technical scheme, carry out the label and the categorised stacking to panel for can be more convenient select suitable panel when the later stage welds.
The invention is further configured to: and d, after the panel is welded, taking out welding slag from the welding position, polishing and flattening the welding position by using a grinding wheel, and leveling the panel to keep the panel flat.
Through adopting above-mentioned technical scheme, welding process can cause the local deformation of panel, clears away the welding position and levels the panel after polishing and flattening, can guarantee the roughness of last welded people's air defense door.
The invention is further configured to: in the step d, after the panel is leveled, the panel is placed into a tempering furnace for tempering, the panel is heated to 450-500 ℃ during tempering, the heat preservation time is 240-320 min, and after the heat preservation is finished, the panel is air-cooled to the room temperature.
By adopting the technical scheme, the structural stress in the panel can be eliminated by tempering the welded panel.
The invention is further configured to: in the step f, a heating net is installed between the two steel reinforcement cages, when the heating net is installed, two installation holes are drilled on the frame, an insulating sleeve is fixed in each installation hole, then a conductive steel bar penetrates through each insulating sleeve, and then two ends of the heating net are welded on the two conductive steel bars respectively;
in the step j, when concrete is maintained, the concrete is firstly kept stand for 4-6 h, then is electrified and heated through a heating net, during heating, the temperature rise speed of the concrete is guaranteed to be less than 10 ℃/h, the temperature rises to 40-45 ℃, after the temperature rise is finished, the integral temperature of the concrete is kept at 40-45 ℃ through heating, the heat preservation time is 18-24 h, the temperature reduction speed is less than 10 ℃/h when the temperature is reduced after the heat preservation is finished, and after the temperature is reduced to the room temperature, the concrete is continuously kept stand for 24h, so that the maintenance of the concrete is finished.
Through adopting above-mentioned technical scheme, heat the concrete through the heating net in the middle of the pre-buried income concrete to wrap up the concrete through the film that forms behind the spraying perchloro ethylene resin plastic solution, make the concrete can reach the effect similar to steam curing, neither can cause the corrosion of frame, can accelerate the hydration reaction of cement again, shorten the time of concrete maintenance.
The invention is further configured to: in the step j, when the heating net is electrified, the positive and negative cables of the power supply are respectively connected to the two conductive steel bars on the two sides of the heating net to form a complete closed loop, and the magnitude of the current is controlled.
Through adopting above-mentioned technical scheme, through in being connected to a closed return circuit with the heating network for when the electric current flows through the heating network, because the resistance of heating network itself and heat production realize the heating to the concrete, and through the size of control current, can control the speed of heating and the temperature of heating.
The invention is further configured to: and g, burying a bottom heating net at the top of the casting platform, fixedly connecting two ends of the bottom heating net with conductive steel bars, and covering the top of the casting platform with a layer of insulating heat-conducting plate made of heat-conducting plastic.
The invention is further configured to: and between the step i and the step j, mounting a top heating net, spot-welding two fixed sleeves at two ends of the top of the frame, fixing an insulating sleeve in the fixed sleeves, then inserting two conductive steel bars in the two insulating sleeves, laying an insulating heat-conducting plate on the top of the poured concrete, wherein the insulating heat-conducting plate is made of heat-conducting plastic, then placing the top heating net at the top of the insulating heat-conducting plate, and welding two ends of the top heating net on the conductive steel bars in the two fixed sleeves respectively.
Through adopting above-mentioned technical scheme, set up top heating network and bottom heating network respectively at the top of concrete and bottom, can make the concrete everywhere by more even heating to make the concrete difference in temperature everywhere less, thereby make the concrete be difficult to the problem that the fracture appears in the middle of the process of heating maintenance.
In summary, compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the frame is welded firstly, then the layer of perchloro-ethylene resin plastic solution is uniformly sprayed on the frame, then the frame is placed on the pouring base for pouring and curing of concrete, water vapor is isolated by the film formed by drying the perchloro-ethylene resin plastic solution, so that the frame is not easy to rust in the curing process, and after the concrete curing is finished, the panel is welded, so that the panel is not easy to rust due to the curing, and the structural strength of the civil air defense door in the later period is not easy to be influenced;
2. the concrete is heated by the heating net embedded in the concrete, and the concrete is wrapped by the film formed after the perchloro-ethylene resin plastic solution is sprayed, so that the concrete can achieve the effect similar to steam curing, the frame is not corroded, the hydration reaction of cement can be accelerated, and the concrete curing time is shortened.
Detailed Description
Example (b): a production process of a civil air defense door with a steel door leaf comprises the following steps:
a. blanking: according to design requirements, plates and the like are cut and blanked, the plates are marked on the surfaces after blanking, and the plates are stacked in a classified mode according to panel materials, frame materials and reinforcement cage materials;
b. straightening: straightening and leveling the plate to keep the plate flat;
c. assembling a frame: establishing an assembly platform, horizontally arranging the top of the assembly platform, welding the plates forming the frame together on the assembly platform, and after welding is finished, clearly polishing welding slag at the welding position and flattening the welding position by a grinding wheel;
d. assembling the panel: welding a plurality of assembled panel plates to form a complete panel, taking out welding slag from the welding position after the panel welding is finished, polishing and flattening the welding position by using a grinding wheel, and leveling the panel to keep the panel flat; then placing the panel into a tempering furnace for tempering, heating the panel to 450-500 ℃ during tempering, keeping the temperature for 240-320 min, and cooling the panel to room temperature after the temperature is kept;
e. welding a reinforcement cage: welding the steel bars into two steel bar cages;
f. installing a steel reinforcement cage and a heating net: welding two reinforcement cages in a frame, respectively welding the two reinforcement cages at two sides of the frame close to the two panels, and positioning a heating net between the two reinforcement cages;
g. building a pouring platform: building a pouring platform, embedding a bottom heating net at the top of the pouring platform, fixedly connecting two ends of the bottom heating net with conductive steel bars, and then covering a layer of insulating heat-conducting plate on the top of the pouring platform, wherein the insulating heat-conducting plate is made of heat-conducting plastic;
h. spraying a perchloro-vinyl resin plastic solution: uniformly spraying a layer of perchloro-ethylene resin plastic solution on the outer side of the frame and the outer side of the reinforcement cage, and carrying out the next operation after the perchloro-ethylene resin plastic solution is dried;
i. pouring concrete: placing a frame on the top of an insulating heat-conducting plate, closely attaching the bottom of the frame and the top of the insulating heat-conducting plate together, then pouring concrete into the frame, ensuring the compactness of the concrete in the pouring process in a vibrator vibrating mode, trowelling the top of the concrete through a scraper after the concrete is poured, spraying a layer of perchloro-vinyl resin plastic solution on the top of the concrete after trowelling, and carrying out the next operation after the perchloro-vinyl resin plastic solution is dried;
j. installing a top heating net: then spot welding two fixed sleeves at two ends of the top of the frame, fixing an insulating sleeve in the fixed sleeves, then inserting two conductive steel bars in the two insulating sleeves, laying a layer of insulating heat-conducting plate on the top of the poured concrete, wherein the insulating heat-conducting plate is made of heat-conducting plastic, then placing a top heating net on the top of the insulating heat-conducting plate, and two ends of the top heating net are respectively welded on the conductive steel bars in the two fixed sleeves;
k. concrete curing: after concrete pouring is finished, standing the concrete, after standing for 4-6 h, electrifying and heating through a heating net, a top heating net and a bottom heating net, ensuring that the heating speed of the concrete is less than 10 ℃/h during heating, heating to 40-45 ℃, keeping the integral temperature of the concrete at 40-45 ℃ through heating after heating is finished, keeping the heat preservation time at 18-24 h, ensuring that the cooling speed is less than 10 ℃/h during cooling after heat preservation is finished, and continuing to stand the concrete for 24h after cooling to room temperature to finish the curing of the concrete;
when the heating net is electrified, connecting positive and negative cables of a power supply to two conductive steel bars on two sides of the heating net respectively to form a complete closed loop, controlling the heating quantity of the heating net by controlling the magnitude of current, wherein the heating modes of the top heating net and the bottom heating net are the same as the heating mode of the heating net;
m, panel welding: take off the insulating heat-conducting plate at concrete top and demolish two fixed sheathes on the frame, then polish the junction of frame and fixed sheathes and level, later weld the panel in the frame both sides.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (8)
1. A production process of a civil air defense door with a steel door leaf is characterized in that: the method comprises the following steps:
a. blanking: shearing and blanking plates and the like according to design requirements;
b. straightening: straightening and leveling the plate to keep the plate flat;
c. assembling a frame: establishing an assembly platform, horizontally arranging the top of the assembly platform, welding the plates forming the frame together on the assembly platform, and after welding is finished, clearly polishing welding slag at the welding position and flattening the welding position by a grinding wheel;
d. assembling the panel: welding a plurality of plates of the assembled panel to form a complete panel;
e. welding a reinforcement cage: welding the steel bars into two steel bar cages;
f. welding a reinforcement cage: welding two reinforcement cages in the frame, wherein the two reinforcement cages are respectively welded on two sides of the frame close to the two panels;
g. building a pouring platform: building a pouring platform;
h. spraying a perchloro-vinyl resin plastic solution: uniformly spraying a layer of perchloro-ethylene resin plastic solution on the outer side of the frame and the outer side of the reinforcement cage, and carrying out the next operation after the perchloro-ethylene resin plastic solution is dried;
i. pouring concrete: placing a frame on the top of an insulating heat-conducting plate, closely attaching the bottom of the frame and the top of the insulating heat-conducting plate together, then pouring concrete into the frame, ensuring the compactness of the concrete in the pouring process in a vibrator vibrating mode, trowelling the top of the concrete through a scraper after the concrete is poured, spraying a layer of perchloro-vinyl resin plastic solution on the top of the concrete after trowelling, and carrying out the next operation after the perchloro-vinyl resin plastic solution is dried;
j. concrete curing: after the concrete pouring is finished, curing the concrete;
k. panel welding: take off the insulating heat-conducting plate at concrete top and demolish two fixed sheathes on the frame, then polish the junction of frame and fixed sheathes and level, later weld the panel in the frame both sides.
2. The production process of the civil air defense door with the steel door leaf as claimed in claim 1, wherein the production process comprises the following steps: in the step a, after blanking, the surface of the plate is marked, and the plate is classified and stacked according to panel materials, frame materials and reinforcement cage materials.
3. The production process of the civil air defense door with the steel door leaf as claimed in claim 1, wherein the production process comprises the following steps: and d, after the panel is welded, taking out welding slag from the welding position, polishing and flattening the welding position by using a grinding wheel, and leveling the panel to keep the panel flat.
4. The production process of the civil air defense door with the steel door leaf as claimed in claim 3, wherein the production process comprises the following steps: in the step d, after the panel is leveled, the panel is placed into a tempering furnace for tempering, the panel is heated to 450-500 ℃ during tempering, the heat preservation time is 240-320 min, and after the heat preservation is finished, the panel is air-cooled to the room temperature.
5. The production process of the civil air defense door with the steel door leaf as claimed in claim 1, wherein the production process comprises the following steps: in the step f, a heating net is installed between the two steel reinforcement cages, when the heating net is installed, two installation holes are drilled on the frame, an insulating sleeve is fixed in each installation hole, then a conductive steel bar penetrates through each insulating sleeve, and then two ends of the heating net are welded on the two conductive steel bars respectively;
in the step j, when concrete is maintained, the concrete is firstly kept stand for 4-6 h, then is electrified and heated through a heating net, during heating, the temperature rise speed of the concrete is guaranteed to be less than 10 ℃/h, the temperature rises to 40-45 ℃, after the temperature rise is finished, the integral temperature of the concrete is kept at 40-45 ℃ through heating, the heat preservation time is 18-24 h, the temperature reduction speed is less than 10 ℃/h when the temperature is reduced after the heat preservation is finished, and after the temperature is reduced to the room temperature, the concrete is continuously kept stand for 24h, so that the maintenance of the concrete is finished.
6. The production process of the steel door leaf civil air defense door according to claim 5, characterized in that: in the step j, when the heating net is electrified, positive and negative cables of a power supply are respectively connected to the two conductive steel bars on the two sides of the heating net to form a complete closed loop, the heating amount of the heating net is controlled by controlling the magnitude of current, and the heating modes of the top heating net and the bottom heating net are the same as the heating mode of the heating net.
7. The production process of the steel door leaf civil air defense door according to claim 5, characterized in that: and g, burying a bottom heating net at the top of the casting platform, fixedly connecting two ends of the bottom heating net with conductive steel bars, and covering the top of the casting platform with a layer of insulating heat-conducting plate made of heat-conducting plastic.
8. The production process of the steel door leaf civil air defense door according to claim 7, characterized in that: and between the step i and the step j, mounting a top heating net, spot-welding two fixed sleeves at two ends of the top of the frame, fixing an insulating sleeve in the fixed sleeves, then inserting two conductive steel bars in the two insulating sleeves, laying an insulating heat-conducting plate on the top of the poured concrete, wherein the insulating heat-conducting plate is made of heat-conducting plastic, then placing the top heating net at the top of the insulating heat-conducting plate, and welding two ends of the top heating net on the conductive steel bars in the two fixed sleeves respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010002249.1A CN111185993B (en) | 2020-01-02 | 2020-01-02 | Production process of civil air defense door with steel door leaf |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010002249.1A CN111185993B (en) | 2020-01-02 | 2020-01-02 | Production process of civil air defense door with steel door leaf |
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| Publication Number | Publication Date |
|---|---|
| CN111185993A true CN111185993A (en) | 2020-05-22 |
| CN111185993B CN111185993B (en) | 2021-05-04 |
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| CN202010002249.1A Active CN111185993B (en) | 2020-01-02 | 2020-01-02 | Production process of civil air defense door with steel door leaf |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111206857A (en) * | 2020-01-02 | 2020-05-29 | 上海凯斯特民防设备有限公司 | Concrete civil air defense door and production process thereof |
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| CN111206857A (en) * | 2020-01-02 | 2020-05-29 | 上海凯斯特民防设备有限公司 | Concrete civil air defense door and production process thereof |
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