Heating device and heating method suitable for winter concrete construction

Abstract

The present invention proposes a heat preservation device and a heat preservation method suitable for winter concrete construction, which belongs to the technical field of building construction equipment. The heat preservation device includes a cover plate, a plastic film, a protective mechanism and a support mechanism. The cover plate is arranged above the support mechanism, the protective mechanism is movably connected to the outside of the support mechanism, the protective mechanism is connected to the cover plate, the two ends of the plastic film are respectively connected to the cover plate and the support mechanism, the cover plate, the plastic film and the support mechanism jointly form a heat preservation cavity, an annular plastic film accommodating cavity is arranged between the protective mechanism and the support mechanism, a ventilation mechanism connected to the heat preservation cavity is arranged below the support mechanism, and an installation port is arranged at the bottom of the support mechanism, and the installation port is connected to the heat preservation cavity. The heat preservation device of the present invention can easily put the plastic film on the concrete column, and can ensure that the film is not punctured by the steel cage to be poured, and ensure that the plastic film can store enough air for a long time.

Description

Technical Field

[0001] The present invention belongs to the technical field of building construction equipment, and relates to the technology of building construction concrete heating equipment, and specifically to a heating device and a heating method suitable for winter concrete construction. Background Art

[0002] The weather is cold in winter. If the cast-in-place concrete columns are not properly maintained, they are very susceptible to freezing, and may crack, become loose, and have a long setting time, which may damage the strength of the concrete columns and cause poor quality. Therefore, cast-in-place concrete columns need to be kept warm in winter. The existing warming method is to cover the outside of the concrete with a plastic film, blow air into the plastic film after covering, and seal the plastic film after blowing the air, so that the plastic film is always wrapped with closed, non-circulating air, reducing the temperature dissipation rate around the concrete column, and keeping the concrete column warm through the wrapped air. However, the existing warming device has the following problems:

[0003] 1. The plastic film is thin and can be easily punctured by the steel cage to be poured on the concrete column, causing the air to be unable to be stored normally in the plastic film, resulting in poor thermal insulation effect.

[0004] 2. The plastic films removed at the construction site are not easy to collect, resulting in the plastic films being thrown everywhere at the construction site, affecting the construction site environment and not being conducive to the recycling of the plastic films. Summary of the invention

[0005] In view of the problem that when the existing cast-in-place concrete columns are kept warm in winter by plastic films, the plastic films are relatively thin and can be easily punctured by the steel cages to be cast on the concrete columns, resulting in the inability to store air normally in the plastic films, leading to poor warming effects, the present invention proposes a warming device and a warming method suitable for winter concrete construction. The specific technical scheme is as follows:

[0006] A warming device suitable for winter concrete construction comprises a cover plate, a plastic film, a protective mechanism and a supporting mechanism, wherein the cover plate is arranged above the supporting mechanism, the protective mechanism is movably connected to the outside of the supporting mechanism, the protective mechanism is connected to the cover plate, the two ends of the plastic film are respectively connected to the cover plate and the supporting mechanism, the cover plate, the plastic film and the supporting mechanism together form a warming cavity, an annular plastic film accommodating cavity is arranged between the protective mechanism and the supporting mechanism, a ventilation mechanism connected to the warming cavity is arranged below the supporting mechanism, and an installation port is arranged at the bottom of the supporting mechanism, and the installation port is connected to the warming cavity.

[0007] It is further defined that the supporting mechanism is a cylindrical seat, the ventilation mechanism includes an air inlet, a vent and an annular air duct, the annular air duct is arranged on the cylindrical seat, the air inlet is connected to the annular air duct, and the annular air duct is connected to the warming chamber through the vent.

[0008] It is further defined that there are a plurality of ventilation openings, and the plurality of ventilation openings are evenly arranged along the circumference of the annular air duct.

[0009] It is further defined that the protection mechanism is an annular protective sleeve, the annular protective sleeve is arranged on the outside of the cylindrical seat, an annular protective sleeve sliding groove is arranged on the outside of the cylindrical seat, and the annular protective sleeve can slide axially along the annular protective sleeve sliding groove.

[0010] It is further defined that a plug-in block is provided at the lower end of the annular protective sleeve, a groove is provided at the bottom of the cylindrical seat, and the shape of the plug-in block matches the inner cavity shape of the groove.

[0011] It is further defined that the above-mentioned heating device suitable for winter concrete construction also includes a connecting piece, and the connecting piece includes a Velcro and an adhesive, the Velcro is arranged on the upper end of the annular protective sleeve, and the adhesive is arranged on the upper end surface of the cover plate, and the Velcro matches the adhesive.

[0012] It is further defined that the above-mentioned heating device suitable for winter concrete construction also includes a hanging mechanism, which includes a hook and a hanging rope, and the hook is connected to the upper end surface of the cover plate through the hanging rope.

[0013] The above-mentioned heat preservation method of the heat preservation device suitable for winter concrete construction comprises the following steps:

[0014] 1) Lift the hanging mechanism upward, pull the plastic film out of the plastic film receiving cavity and unfold it to form a cylindrical structure, and lift the entire thermal insulation device above the concrete column;

[0015] 2) Put the concrete column into the heat preservation cavity from top to bottom along the installation opening, blow air into the heat preservation cavity through the ventilation mechanism to fill the heat preservation cavity with air, tie and seal the lower end of the plastic film to keep the heat preservation cavity with stagnant air at all times, reduce the air flow rate around the concrete column, and perform heat preservation and maintenance on the concrete column;

[0016] 3) After the thermal insulation maintenance is completed, the lower end of the plastic film is loosened, the entire thermal insulation device is lifted upwards through the hanging mechanism, the entire thermal insulation device is removed from the concrete column, the plastic film is compressed into the plastic film receiving cavity, and the plastic film is recycled.

[0017] It is further defined that the step 1) specifically comprises: separating the adhesive from the Velcro, lifting the hook upwards, lifting the cover plate upwards through the hook, pulling the plastic film out of the plastic film receiving cavity through the cover plate and unfolding it to form a cylindrical structure; sliding the annular protective sleeve downwards along the annular protective sleeve sliding groove, inserting the plug-in block on the annular protective sleeve into the groove at the bottom of the cylindrical seat, and lifting the entire heating device above the concrete column;

[0018] The step 2) is specifically as follows: the concrete column is placed in the heat preservation cavity from top to bottom along the installation opening, air is blown into the annular air duct through the air inlet, the air is evenly mixed in the annular air duct and then enters the heat preservation cavity through multiple ventilation holes, so that the heat preservation cavity is evenly filled with air, the lower end of the plastic film is tied and sealed, so that there is always stagnant air in the heat preservation cavity, the flow rate of air around the concrete column is reduced, and the concrete column is heat-preserved.

[0019] It is further defined that step 3) is specifically as follows: after the thermal insulation maintenance is completed, the lower end of the plastic film is loosened, the entire thermal insulation device is lifted upward by a hook, the entire thermal insulation device is removed from the concrete column, the plug-in block on the annular protective sleeve is pulled out from the groove, and the annular protective sleeve is slid upward along the annular protective sleeve sliding groove to form a plastic film accommodating cavity between the annular protective sleeve and the cylindrical seat, the plastic film is compressed downward into the plastic film accommodating cavity, the adhesive and Velcro are bonded, and the plastic film is recycled.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention is suitable for a warming device for concrete construction in winter, which includes a cover plate, a plastic film, a protective mechanism and a supporting mechanism. The cover plate is arranged above the supporting mechanism, the protective mechanism is movably connected to the outside of the supporting mechanism, the protective mechanism is connected to the cover plate, the two ends of the plastic film are respectively connected to the cover plate and the supporting mechanism, the cover plate, the plastic film and the supporting mechanism together form a warming cavity, an annular plastic film accommodating cavity is arranged between the protective mechanism and the supporting mechanism, a ventilation mechanism connected to the warming cavity is arranged below the supporting mechanism, and an installation port is arranged at the bottom of the supporting mechanism, and the installation port is connected to the warming cavity. When in use, the plastic film is pulled out from the plastic film receiving cavity and unfolded to form a cylindrical structure, and the entire thermal insulation device is lifted above the concrete; the concrete column is sheathed in the thermal insulation cavity from top to bottom along the installation port, and air is blown into the thermal insulation cavity through the ventilation mechanism to fill the thermal insulation cavity with air, and the lower end of the plastic film is tied and sealed so that there is always a non-circulating cavity in the thermal insulation cavity, and the flow rate of the air around the concrete column is reduced to perform thermal insulation maintenance on the concrete column; after the thermal insulation maintenance is completed, the lower end of the plastic film is loosened, and the entire thermal insulation device is lifted upward through the suspension mechanism, and the entire thermal insulation device is removed from the concrete column, and the plastic film is compressed into the plastic film receiving cavity, and the plastic film is recycled. The thermal insulation device of the present invention can easily sheath the plastic film on the concrete column, and can ensure that the plastic film is not punctured by the steel cage to be cast, and ensure that the plastic film can store enough air for a long time; and after use, the plastic film is placed in the plastic film receiving cavity, which is convenient for recycling and reuse next time, and the phenomenon of plastic film being led out and thrown away will not occur at the construction site.

[0022] 2. The ventilation mechanism includes an air inlet, a vent and an annular duct. The annular duct is arranged on the cylindrical seat. The air inlet is connected to the annular duct, and the annular duct is connected to the warm-keeping chamber through the vent. The air entering the warm-keeping chamber first enters the annular duct through the air inlet, is evenly mixed in the annular duct, and then enters the warm-keeping chamber through the vent. There are multiple vents, and the multiple vents are evenly arranged along the circumference of the annular duct, which can ensure that the air entering the warm-keeping chamber is evenly distributed.

[0023] 3. The protective mechanism is an annular protective sleeve, which is arranged on the outside of the cylindrical seat. An annular protective sleeve sliding groove is arranged on the outside of the cylindrical seat. The annular protective sleeve can slide along the axial direction of the annular protective sleeve sliding groove. A plug-in block is arranged at the lower end of the annular protective sleeve, and a groove is arranged at the bottom of the cylindrical seat. The shape of the plug-in block matches the inner shape of the groove. If you want to store the plastic film, pull the plug-in block out of the groove, slide the annular protective sleeve upward along the annular protective sleeve sliding groove, so that a plastic film accommodating cavity is formed between the annular protective sleeve and the cylindrical seat, store the plastic film in the plastic film accommodating cavity, and connect the annular protective sleeve to the cover plate by pasting and buckling; if you want to use the plastic film, pull the plastic film out of the plastic film accommodating cavity, unfold it and form a cylindrical structure, slide the annular protective sleeve downward along the annular protective sleeve sliding groove, and clamp the plug-in block in the groove. The use process is very simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the folded warming device suitable for winter concrete construction of the present invention;

[0025] Figure 2 It is a cross-sectional view of the folded warming device for winter concrete construction of the present invention;

[0026] Figure 3 for Figure 2 A partial enlarged view of the middle A area;

[0027] Figure 4 The present invention is applicable to the use of the warming device of winter concrete construction Figure 1 ;

[0028] Figure 5 The present invention is applicable to the use of the warming device of winter concrete construction Figure 2 ;

[0029] Among them, 1-hook, 2-hanging rope, 3-cover plate, 4-annular protective cover, 5-cylindrical seat, 6-air inlet, 7-velcro, 8-adhesion, 9-plastic film, 10-ventilation port, 11-annular air duct, 12-groove, 13-plug-in block. DETAILED DESCRIPTION

[0030] The technical solution of the present invention is further explained below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited to the implementation modes described below.

[0031] The present invention is suitable for a heat preservation device for winter concrete construction, comprising a cover plate 3, a plastic film 9, a protective mechanism and a support mechanism, wherein the cover plate is arranged above the support mechanism, the protective mechanism is movably connected to the outside of the support mechanism, the protective mechanism is connected to the cover plate 3, the two ends of the plastic film 9 are respectively connected to the cover plate 3 and the support mechanism, the cover plate 3, the plastic film 9 and the support mechanism jointly form a heat preservation cavity, an annular plastic film accommodating cavity is arranged between the protective mechanism and the support mechanism, a ventilation mechanism connected to the heat preservation cavity is arranged below the support mechanism, and a mounting port is arranged at the bottom of the support mechanism, and the mounting port is connected to the heat preservation cavity. The support mechanism is a cylindrical seat 5, the ventilation mechanism comprises an air inlet 6, a vent 10 and an annular air duct 11, the annular air duct 11 is arranged on the cylindrical seat 5, the air inlet 6 is connected to the annular air duct 11, and the annular air duct 11 is connected to the heat preservation cavity through the vent 10. There are multiple vents 10, and the multiple vents 10 are evenly arranged along the circumference of the annular air duct 11. The protection mechanism is an annular protective sleeve 4, which is set on the outside of the cylindrical seat 5. The outer side of the cylindrical seat 5 is provided with an annular protective sleeve sliding groove, and the annular protective sleeve 4 can slide along the axial direction of the annular protective sleeve sliding groove. The lower end of the annular protective sleeve 4 is provided with a plug-in block 13, and the bottom of the cylindrical seat 5 is provided with a groove 12. The shape of the plug-in block 13 matches the inner cavity shape of the groove 12.

[0032] The above-mentioned heating device suitable for winter concrete construction also includes a connecting piece, which includes a Velcro 7 and an adhesive 8. The Velcro 7 is arranged on the upper end of the annular protective sleeve 4, and the adhesive 8 is arranged on the upper end surface of the cover plate 3. The Velcro 7 matches the adhesive 8.

[0033] The above-mentioned warming device suitable for winter concrete construction also includes a hanging mechanism, which includes a hook 1 and a hanging rope 2, and the hook 1 is connected to the upper end surface of the cover plate 3 through the hanging rope 2.

[0034] The above-mentioned heat preservation method of the heat preservation device for winter concrete construction comprises the following steps:

[0035] 1. Lift the hanging mechanism upward, pull the plastic film 9 out of the plastic film receiving cavity and unfold it to form a cylindrical structure, and lift the entire thermal insulation device above the concrete column;

[0036] 2. Put the concrete column into the heat preservation cavity from top to bottom along the installation opening, blow air into the heat preservation cavity through the ventilation mechanism to fill the heat preservation cavity with air, tie and seal the lower end of the plastic film 9, so that there is always stagnant air in the heat preservation cavity, reduce the flow rate of air around the concrete column, and perform heat preservation and maintenance on the concrete column;

[0037] After the heat preservation and curing is completed, the lower end of the plastic film 9 is loosened, the entire heat preservation device is lifted upward by the hanging mechanism, the entire heat preservation device is removed from the concrete column, the plastic film 9 is compressed into the plastic film accommodating cavity, and the plastic film 9 is recovered.

[0038] Step 1 is specifically as follows: separate the adhesive 8 from the Velcro 7, lift the hook 1 upwards, lift the cover plate 3 upwards through the hook 1, pull the plastic film 9 out of the plastic film accommodating cavity through the cover plate 3 and unfold it to form a cylindrical structure; slide the annular protective sleeve 4 downwards along the annular protective sleeve sliding groove, insert the plug-in block 13 on the annular protective sleeve 4 into the groove 12 at the bottom of the cylindrical seat 5, and lift the entire warming device above the concrete column;

[0039] Step 2 is specifically as follows: insert the concrete column into the warm-keeping cavity along the installation opening from top to bottom, blow air into the annular air duct 11 through the air inlet 6, and the air enters the warm-keeping cavity through multiple vents 10 after being evenly mixed in the annular air duct 11, so that the warm-keeping cavity is evenly filled with air, tie and seal the lower end of the plastic film 9, so that there is always stagnant air in the warm-keeping cavity, reduce the flow rate of the air around the concrete column, and perform warm-keeping maintenance on the concrete column.

[0040] Step 3 is specifically as follows: after the thermal insulation maintenance is completed, the lower end of the plastic film 9 is loosened, the entire thermal insulation device is lifted up by the hook 1, the entire thermal insulation device is removed from the concrete column, the plug-in block 13 on the annular protective sleeve 4 is pulled out from the groove 12, and the annular protective sleeve 4 is slid upward along the annular protective sleeve sliding groove to form a plastic film accommodating cavity between the annular protective sleeve 4 and the cylindrical seat 5, the plastic film 9 is compressed downward into the plastic film accommodating cavity, the adhesive 8 is bonded to the Velcro 7, and the plastic film 9 is recycled.

[0041] Example 1

[0042] See also Figure 1-Figure 3, the present embodiment is suitable for the warming device of winter concrete construction, which includes a hanging mechanism, a cover plate 3, a plastic film 9, a connecting piece, a protective mechanism and a supporting mechanism, the hanging mechanism includes a hook 1 and a hanging rope 2, the hook 1 is connected to the upper end surface of the cover plate 3 through the hanging rope 2; a circle of plastic film connecting ears is arranged at the lower end of the cover plate 3; the protective mechanism is an annular protective sleeve 4, the supporting mechanism is a cylindrical seat 5, the cylindrical seat 5 is arranged below the cover plate 3, one end of the plastic film 9 is connected to the plastic film connecting ear, and the other end of the plastic film 9 is connected to the outer wall of the cylindrical seat 5, the cover plate 3, the plastic film 9 and the cylindrical seat together form a warming cavity, and a mounting port is arranged at the bottom of the cylindrical seat 5, and the mounting port is connected to the warming cavity; a ventilation mechanism is arranged on the cylindrical seat 5, the ventilation mechanism includes an air inlet 6, a vent 10 and an annular air duct 11, the annular air duct is arranged on the cylindrical seat 5, the air inlet 6 is connected to the annular air duct 11, there are 24 vents 10, and the 24 vents 10 form two rows, each row The vents 10 are evenly distributed around the circumference of the annular air duct 11, and the annular air duct 11 is connected to the warm-keeping cavity through 24 vents 10; the annular protective sleeve 4 is sleeved on the outside of the cylindrical seat 5, and an annular protective sleeve sliding groove is arranged on the outside of the cylindrical seat 5, and a plug-in block 13 is arranged at the lower end of the annular protective sleeve 4, and the plug-in block 13 is placed in the annular protective sleeve sliding groove, and the plug-in block 13 can slide along the annular protective sleeve sliding groove, and a groove 12 is arranged on the cylindrical seat 5, and the groove 12 is arranged at the lower end of the annular protective sleeve sliding groove, and the shape of the plug-in block 13 matches the inner cavity shape of the groove 12; the connecting piece includes a Velcro 7 and an adhesive 8, a Velcro 7 is arranged at the upper end of the annular protective sleeve 4, and an adhesive 8 is arranged on the upper end surface of the cover plate 3, and the Velcro 7 and the adhesive 8 are bonded to connect the annular protective sleeve 4 to the cover plate 3; a plastic film accommodating cavity is arranged between the annular protective sleeve 4 and the cylindrical seat 5, and the lower end of the annular protective sleeve 4 is arranged below the connection between the plastic film 9 and the cylindrical seat 5.

[0043] When the plastic film 9 needs to be stored, the plug-in block 13 at the lower end of the annular protective sleeve 4 is pulled out from the groove 12, and the plug-in block 13 is slid upward along the sliding groove of the annular protective sleeve to form a plastic film accommodating chamber between the annular protective sleeve 4 and the cylindrical seat 5, and the plastic film 9 is compressed into the plastic film accommodating chamber; when the plastic film 9 needs to be unfolded, the plastic film 9 is pulled out from the plastic film accommodating chamber, unfolded and formed into a cylindrical structure, and then the plug-in block 13 is slid downward along the sliding groove of the annular protective sleeve, and the plug-in block 13 is inserted into the groove 12, so that the annular protective sleeve 4 does not affect the normal use of the plastic film 9. The heat preservation device of the present invention can conveniently cover the plastic film on the concrete column, and can ensure that the plastic film 9 is not punctured by the steel cage to be cast, and ensure that the plastic film 9 can store enough air for a long time; and after use, the plastic film 9 is placed in the plastic film accommodating chamber, which is convenient for recycling and reuse next time, and the phenomenon of throwing plastic film 9 everywhere at the construction site will not occur.

[0044] Example 2

[0045] Different from Example 1, this embodiment is suitable for a heating device for concrete construction in winter, and its hanging mechanism is a hook 1, which is connected to the upper end surface of the cover plate 3; there are 12 vents 10, and 24 vents 10 form a row, and the row of vents 10 is evenly distributed around the circumference of the annular air duct 11, and the annular air duct 11 is connected to the heating chamber through the 12 vents 10, and the connecting part includes a hook and a clamping ring. A hook is provided at the upper end of the annular protective sleeve 4, and a clamping ring is provided on the upper end surface of the cover plate 3. The hook can be sleeved in the clamping ring to connect the annular protective sleeve 4 with the cover plate 3, which is the same as Example 1.

[0046] Example 3

[0047] join Figure 4-Figure 5 This embodiment is applicable to a heat preservation method of a heat preservation device for winter concrete construction, which comprises the following steps:

[0048] 1) Separate the adhesive 8 from the Velcro 7 or separate the hook from the snap ring, lift the hook 1 upward, lift the cover plate 3 upward through the hook 1, pull the plastic film 9 out of the plastic film accommodating cavity through the cover plate 3 and unfold it to form a cylindrical structure; slide the annular protective sleeve 4 downward along the annular protective sleeve sliding groove, insert the plug-in block 13 on the annular protective sleeve 4 into the groove 12 at the bottom of the cylindrical seat 5, and lift the entire thermal insulation device to the top of the concrete column;

[0049] 2) The concrete column is placed in the heat preservation cavity along the installation opening from top to bottom, and air is blown into the annular air duct 11 through the air inlet 6. The air is evenly mixed in the annular air duct 11 and then enters the heat preservation cavity through multiple vents 10, so that the heat preservation cavity is evenly filled with air. The lower end of the plastic film 9 is tied and sealed to keep the heat preservation cavity with stagnant air at all times, thereby reducing the flow rate of the air around the concrete column and performing heat preservation and maintenance on the concrete column.

[0050] 3) After the thermal insulation maintenance is completed, the lower end of the plastic film 9 is loosened, the entire thermal insulation device is lifted up by the hook 1, and the entire thermal insulation device is removed from the concrete column. The plug-in block 13 on the annular protective sleeve 4 is pulled out from the groove 12, and the annular protective sleeve 4 is slid upward along the annular protective sleeve sliding groove to form a plastic film accommodating cavity between the annular protective sleeve 4 and the cylindrical seat 5. The plastic film 9 is compressed downward into the plastic film accommodating cavity, the adhesive 8 is bonded to the Velcro 7, and the plastic film 9 is recycled.

Claims

1. A heating device suitable for winter concrete construction, characterized in that: The invention comprises a cover plate (3), a plastic film (9), a protective mechanism and a supporting mechanism, wherein the cover plate is arranged above the supporting mechanism, the protective mechanism is movably connected to the outside of the supporting mechanism, the protective mechanism is connected to the cover plate (3), the two ends of the plastic film (9) are respectively connected to the cover plate (3) and the supporting mechanism, the cover plate (3), the plastic film (9) and the supporting mechanism together form a heat preservation cavity, an annular plastic film accommodating cavity is arranged between the protective mechanism and the supporting mechanism, a ventilation mechanism connected to the heat preservation cavity is arranged below the supporting mechanism, and a mounting opening is arranged at the bottom of the supporting mechanism, the mounting opening is connected to the heat preservation cavity; The supporting mechanism is a cylindrical seat (5); the ventilation mechanism comprises an air inlet (6), a vent (10) and an annular air duct (11); the annular air duct (11) is arranged on the cylindrical seat (5); the air inlet (6) is in communication with the annular air duct (11); and the annular air duct (11) is in communication with the heat preservation chamber via the vent (10); When in use, the concrete column is placed in the heat preservation cavity from top to bottom along the installation opening, air is blown into the heat preservation cavity through the ventilation mechanism to fill the heat preservation cavity with air, and the lower end of the plastic film (9) is tied and sealed so that a non-circulating cavity is always maintained in the heat preservation cavity, thereby reducing the flow rate of air around the concrete column and performing heat preservation and maintenance on the concrete column.

2. The warming device suitable for winter concrete construction as claimed in claim 1, characterized in that: There are a plurality of ventilation openings (10), and the plurality of ventilation openings (10) are evenly arranged along the circumference of the annular air duct (11).

3. The warming device suitable for winter concrete construction as claimed in claim 2, characterized in that: The protective mechanism is an annular protective sleeve (4), the annular protective sleeve (4) being arranged on the outside of the cylindrical seat (5), the outer side of the cylindrical seat (5) being provided with an annular protective sleeve sliding groove, and the annular protective sleeve (4) being able to slide axially along the annular protective sleeve sliding groove.

4. The warming device suitable for winter concrete construction as claimed in claim 3, characterized in that: A plug-in block (13) is provided at the lower end of the annular protective sleeve (4), a groove (12) is provided at the bottom of the cylindrical seat (5), and the shape of the plug-in block (13) matches the inner cavity shape of the groove (12).

5. The warming device suitable for winter concrete construction as claimed in claim 4, characterized in that: The heat preservation device suitable for winter concrete construction also includes a connecting piece, the connecting piece includes a hook and loop fastener (7) and a paste (8), the hook and loop fastener (7) is arranged on the upper end of the annular protective sleeve (4), the paste (8) is arranged on the upper end surface of the cover plate (3), and the hook and loop fastener (7) matches the paste (8).

6. The warming device suitable for winter concrete construction according to any one of claims 1 to 5, characterized in that: The heat preservation device suitable for winter concrete construction further comprises a suspension mechanism, wherein the suspension mechanism comprises a suspension hook (1) and a suspension rope (2), wherein the suspension hook (1) is connected to the upper end surface of the cover plate (3) via the suspension rope (2).

7. The method for keeping warm of a warming device for winter concrete construction as claimed in claim 6, characterized in that: The following steps are involved: 1) lifting the hanging mechanism upwards, pulling the plastic film (9) out of the plastic film receiving cavity and unfolding it to form a cylindrical structure, and lifting the entire thermal insulation device above the concrete column; 2) inserting the concrete column into the heat preservation cavity from top to bottom along the installation opening, blowing air into the heat preservation cavity through the ventilation mechanism to fill the heat preservation cavity with air, tying and sealing the lower end of the plastic film (9) so that there is always stagnant air in the heat preservation cavity, reducing the air flow rate around the concrete column, and performing heat preservation and maintenance on the concrete column; 3) After the heat preservation and curing is completed, the lower end of the plastic film (9) is loosened, the entire heat preservation device is lifted upwards by means of a hanging mechanism, the entire heat preservation device is removed from the concrete column, the plastic film (9) is compressed into the plastic film receiving cavity, and the plastic film (9) is recovered; The step 2) specifically comprises: inserting the concrete column into the heat preservation chamber from top to bottom along the installation opening, blowing air into the annular air duct (11) through the air inlet (6), and the air is evenly mixed in the annular air duct (11) and then enters the heat preservation chamber through a plurality of ventilation holes (10), so that the heat preservation chamber is evenly filled with air, tying and sealing the lower end of the plastic film (9), so that there is always stagnant air in the heat preservation chamber, reducing the flow rate of air around the concrete column, and performing heat preservation and maintenance on the concrete column.

8. The method for keeping warm according to claim 7, characterized in that: The step 1) specifically comprises: separating the adhesive (8) from the Velcro (7), lifting the hook (1) upwards, lifting the cover plate (3) upwards through the hook (1), pulling the plastic film (9) out of the plastic film receiving cavity through the cover plate (3) and unfolding it to form a cylindrical structure; sliding the annular protective sleeve (4) downwards along the annular protective sleeve sliding groove, inserting the plug-in block (13) on the annular protective sleeve (4) into the groove (12) at the bottom of the cylindrical seat (5), and lifting the entire thermal insulation device above the concrete column.

9. The method for keeping warm according to claim 8, characterized in that: The step 3) is specifically as follows: after the heat preservation and curing is completed, the lower end of the plastic film (9) is loosened, the entire heat preservation device is lifted upwards by means of the hook (1), the entire heat preservation device is removed from the concrete column, the plug-in block (13) on the annular protective sleeve (4) is pulled out from the groove (12), and the annular protective sleeve (4) is slid upwards along the annular protective sleeve sliding groove to form a plastic film accommodating cavity between the annular protective sleeve (4) and the cylindrical seat (5), the plastic film (9) is compressed downwards into the plastic film accommodating cavity, the adhesive (8) is bonded to the Velcro (7), and the plastic film (9) is recovered.

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