CN115450448B - Large-volume concrete uniform heat dissipation device and construction method - Google Patents
Large-volume concrete uniform heat dissipation device and construction method Download PDFInfo
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- CN115450448B CN115450448B CN202211085075.5A CN202211085075A CN115450448B CN 115450448 B CN115450448 B CN 115450448B CN 202211085075 A CN202211085075 A CN 202211085075A CN 115450448 B CN115450448 B CN 115450448B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
- E04G21/246—Safety or protective measures preventing damage to building parts or finishing work during construction specially adapted for curing concrete in situ, e.g. by covering it with protective sheets
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0075—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability making use of a decrease in temperature
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D31/00—Other cooling or freezing apparatus
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Civil Engineering (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a uniform heat dissipation device for mass concrete and a construction method, and belongs to the technical field of constructional engineering. According to the invention, the annular gap is arranged between the outer pipe and the inner pipe, so that when cooling water flows into the inner pipe, the inner pipe is not contacted with concrete, and heat exchange between the cooling water and the concrete is avoided; the cooling water is enabled to flow into the outer tube and then uniformly dissipate heat of the concrete.
Description
Technical Field
The invention belongs to the technical field of constructional engineering, and particularly relates to a large-volume concrete uniform heat dissipation device and a construction method.
Background
Because the volume of the large-volume concrete structure is larger, the heat dissipation surface is limited, the internal cement hydration heat is not easy to dissipate in time, and the temperature shrinkage crack is easy to generate under the restriction of external environment or internal force of concrete.
In the prior art, cooling water circulation is generally adopted to dissipate heat of concrete, for example, a cooling device for concrete construction is disclosed in chinese patent CN 216039320U, and cooling water is conveyed into a cooling conduit by conveying the cooling conduit into the concrete by snaking the cooling conduit.
However, in the mass concrete, the concrete span is large, and when the cooling water is circulated, the front end of the cooling water in the conveying direction exchanges heat with the concrete when radiating the heat of the concrete, so that the temperature of the cooling water is gradually increased in the conveying process, the heat radiating effect of the concrete on the rear side of the cooling water in the conveying direction is reduced, and the heat radiation is uneven in the mass concrete.
Disclosure of Invention
In view of the above, the invention aims to provide a device for uniformly radiating mass concrete and a construction method thereof, which are used for solving the problem of nonuniform heat radiation in the pouring process of mass concrete in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the invention provides a large-volume concrete uniform heat dissipation device, which comprises a water supply mechanism for supplying cooling water and a water supply pipeline connected with the water supply mechanism, wherein the water supply pipeline is paved in concrete side by side, the water supply pipeline comprises an outer pipe and an inner pipe connected with the outer pipe in a sliding manner, an annular gap is reserved between the inner pipe and the outer pipe, the inner pipe extends to the inner side end of the outer pipe to be sealed, the inner pipe extends to the outer side end of the outer pipe to be connected with a water outlet of the water supply mechanism, the first end of the outer pipe is connected with the inner pipe in a sealing manner, the second end of the outer pipe is connected with a water inlet of the water supply mechanism, a plurality of water spraying ports are arranged on the inner pipe, a sealing pipe is connected on the outer wall of the inner pipe in a limiting sliding manner, and the sealing pipe is connected with the outer pipe in a limiting sliding manner, so that the water spraying ports can be sealed or opened by sliding.
Further, a spray nozzle is rotatably arranged on the water spraying port, an arc-shaped plate connected with the spray nozzle is slidably connected to the inner side wall of the inner pipe, a bar frame is fixedly connected to the arc-shaped plate, the bar frame is rotatably arranged in the inner pipe, and a bar groove is formed in the bar frame;
the inner side of the inner tube is provided with a rotating wheel capable of converting flowing power into rotating power through a rotating shaft, the rotating shaft is close to the bar frame end and provided with a round wheel, the round wheel is close to the bar frame side center and is connected with a roller, and the roller is slidably connected in the bar groove.
Further, be close to on the inner tube water supply mechanism side install be used for the drive sealing tube gliding actuating mechanism, actuating mechanism includes the fixed pipe, fixed pipe fixed mounting is in the inner tube top, the fixed pipe is located water supply mechanism with between the sealing tube, the fixed pipe with the inner tube intercommunication sets up, the inboard sliding connection of fixed pipe has the slide, the slide passes through the spring to be installed in the fixed pipe, the slide is kept away from inner tube side fixedly connected with connecting rod, the connecting rod with fixed pipe sliding connection, the connecting rod other end extends the fixed pipe and articulates there is the pin joint lever, the pin joint lever is kept away from the connecting rod end with the sealing tube articulates
Further, the side of the inner pipe, which is far away from the water supply mechanism, is provided with an annular groove, the sealing pipe is in limit sliding connection in the annular groove, and the sealing pipe is connected with the inner wall of the annular groove through an elastic piece.
Further, a plurality of the water jets are arranged on the inner tube in a circumferential array in the axial direction of the inner tube.
Further, the inner tube is rotatably mounted on a water supply mechanism, and a driving member for driving the inner tube to rotate is mounted on the water supply mechanism.
The invention also provides a construction method for uniform heat dissipation of the mass concrete, which comprises the following steps:
s1: installing the heat dissipating device according to any one of claims 1-6, so that the water supply pipes are uniformly arranged in the concrete form, wherein the requirement that the inner pipe can extend out of the concrete form is satisfied;
s2: installing a temperature measuring element for monitoring the temperature of concrete, wherein the arrangement range of monitoring points is that half axis of the plane diagram symmetrical axis of the selected concrete pouring body is used as a test area, and the monitoring points are arranged in layers according to planes in the test area;
s3: pouring concrete, and pouring the concrete until one layer of inner pipe is covered and vibrating is finishedStarting the water supply mechanism to convey cooling water into the inner pipe, sliding the sealing pipe to open the water spraying port after the cooling water fills the inner pipe, wherein the flow rate of the cooling water is controlled to be 1.2-1.5 m 3 And/h, the temperature difference between the inlet water and the outlet water monitored by the temperature measuring element is not more than 6 ℃.
The invention has the beneficial effects that:
according to the invention, the annular gap is arranged between the outer pipe and the inner pipe, so that when cooling water flows into the inner pipe, the inner pipe is not contacted with concrete, and heat exchange between the cooling water and the concrete is avoided; after the inner pipe is filled with cooling water, the cooling water of the inner pipe is sprayed out from water spray ports arranged side by side into the outer pipe in contact with concrete through the sliding sealing pipe, so that the cooling effect of the cooling water flowing into the outer pipe on the concrete is consistent, and the cooling is uniform in the pouring process of the mass concrete.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
In order to make the objects, technical solutions and advantageous effects of the present invention more clear, the present invention provides the following drawings for description:
fig. 1 is a front sectional view of a water supply pipe according to an embodiment of the present invention;
fig. 2 is a schematic view of a water supply pipe according to an embodiment of the present invention;
FIG. 3 is a schematic view showing the internal structure of an inner tube according to an embodiment of the present invention;
FIG. 4 is an enlarged view of portion B of FIG. 3 in accordance with an embodiment of the present invention;
FIG. 5 is a schematic view of a water supply installation according to an embodiment of the present invention;
FIG. 6 is a front view of an inner tube according to an embodiment of the present invention;
fig. 7 is an enlarged view of part C of fig. 6 in accordance with an embodiment of the present invention.
The figures are marked as follows: 1. a water supply mechanism; 2. an inner tube; 201. a water jet; 202. an annular groove; 3. an outer tube; 4. sealing the tube; 5. a driving mechanism; 501. a fixed tube; 502. a slide plate; 503. a connecting rod; 504. a hinge rod; 505. a spring; 6. a spray head; 7. an arc-shaped plate; 8. a rotating wheel; 9. a rotating shaft; 10. a round wheel; 11. a roller; 12. a bar-shaped frame; 13. a bar-shaped groove; 14. an elastic member; 15. and (3) a concrete template.
Detailed Description
As shown in fig. 1 to 7, the present invention provides a concrete cracking-resistant heat dissipating device, comprising: the water supply mechanism 1 and with the water supply pipeline that water supply mechanism 1 is connected, a plurality of water supply pipelines lay side by side in the concrete, the water supply pipeline includes inner tube 2 and outer tube 3, inner tube 2 installs inside outer tube 3, inner tube 2 with leave annular gap between the outer tube 3, inner tube 2 first end is connected with the delivery port of water supply mechanism 1, the second end closure setting of inner tube 2, the first end of outer tube 3 with inner tube 2 sealing connection, the second end of outer tube 3 is connected with the water inlet of water supply mechanism 1, be equipped with a plurality of water jet 201 side by side on the inner tube 2, spacing sliding connection has sealed tube 4 on the inner tube 2, sealed tube 4 with the spacing sliding connection of outer tube 3 slides sealed tube 4 can make water jet 201 seals or opens.
The working principle of the technical scheme is as follows: as shown in fig. 5, after cooling water is stored in the water supply mechanism 1, and after the water supply pipeline is laid in the concrete form 15, when concrete is poured, the lengths of a plurality of water spray ports 201 arranged side by side on the inner pipe 2 are more than the length of the concrete, as shown in fig. 1, by starting the water supply mechanism 1, the water supply mechanism 1 conveys the cooling water into the inner pipe 2, after the inner pipe 2 is filled with the cooling water, the sealing pipe 4 is slid, the water spray ports 201 are opened, and at the moment, the cooling water is uniformly sprayed into the outer pipe 3 from the plurality of water spray ports 201, and the cooling water uniformly dissipates the heat of the concrete.
The beneficial effects of the technical scheme are that: by providing an annular gap between the outer tube 3 and the inner tube 2, when the cooling water flows into the inner tube 2, heat exchange between the cooling water and the concrete is avoided because the inner tube 2 is not in contact with the concrete; after the inner pipe 2 is filled with cooling water, the cooling water of the inner pipe 2 is sprayed out from the water spray ports 201 arranged side by side into the outer pipe 3 in contact with concrete through the sliding sealing pipe 4, so that the cooling water is ensured to flow into the outer pipe 3 to have uniform cooling effect on the concrete, and the cooling is uniform in the mass concrete pouring process.
In one embodiment of the present invention, the spray nozzle 6 is rotatably installed on the water spraying port 201, the inner side wall of the inner tube 2 is slidably connected with an arc plate 7 connected with the spray nozzle 6, the arc plate 7 is fixedly connected with a bar frame 12, the bar frame 12 is rotatably installed in the inner tube 2, and the bar frame 12 is provided with a bar groove 13;
the inner side of the inner tube 2 is provided with a rotating wheel 8 capable of converting flowing power into rotating power through a rotating shaft 9, the rotating wheel 8 is in a turbine shape, the rotating shaft 9 is close to the end of the bar frame 12 and is provided with a round wheel 10, the round wheel 10 is close to the side of the bar frame 12 and is eccentrically connected with a roller 11, and the roller 11 is slidably connected in the bar groove 13.
The working principle of the technical scheme is as follows: when the water supply mechanism 1 conveys cooling water to the inner pipe 2, the water flows through the rotating wheel 8, the rotating wheel 8 converts the flowing power of the water flow into rotating power, as shown in fig. 4, so that the rotating wheel 8 rotates to drive the rotating shaft 9 and the round wheel 10 to rotate, and the round wheel 10 drives the roller 11 to slide in the strip-shaped groove 13 during rotation, so as to drive the strip-shaped frame 12 to swing, so as to drive the arc-shaped plate 7 to swing in the inner pipe 2, and drive the spray head 6 to rotate to spray water to the outer pipe 3.
The beneficial effects of the technical scheme are that: the spray head 6 is driven to rotate by water flow to spray water to the outer tube 3, so that the spray range of the spray head 6 is improved, the water sprayed from the inner tube 2 is further ensured to be uniformly sprayed in the outer tube 3, and the heat dissipation of concrete is further ensured to be uniform.
In one embodiment of the present invention, a driving mechanism 5 for driving the sealing tube 4 to slide is installed on the inner tube 2 near the water supply mechanism 1, the driving mechanism 5 includes a fixed tube 501, the fixed tube 501 is fixedly installed at the top of the inner tube 2, the fixed tube 501 is located between the water supply mechanism 1 and the sealing tube 4, the fixed tube 501 is disposed in communication with the inner tube 2, a sliding plate 502 is slidingly connected to the inner side of the fixed tube 501, the sliding plate 502 is installed in the fixed tube 501 through a spring 505, a connecting rod 503 is fixedly connected to the side of the sliding plate 502 away from the inner tube 2, the connecting rod 503 is slidingly connected to the fixed tube 501, a hinge rod 504 extends from the other end of the connecting rod 503, and the hinge rod 504 is hinged to the sealing tube 4 away from the end of the connecting rod 503.
The working principle of the technical scheme is as follows: as shown in fig. 1, when the water supply mechanism 1 conveys cooling water into the inner pipe 2, before the cooling water fills the inner pipe 2, the spring 505 is in a normal state, the sealing pipe 4 seals the water spraying port 201, when the cooling water fills the inner pipe 2, the cooling water is continuously conveyed to enable the cooling water to flow into the fixed pipe 501, so that the sliding plate 502 is extruded, the sliding plate 502 is driven to slide upwards, the connecting rod 503 is driven to slide upwards, the sealing pipe 4 is pulled by the hinging rod 504 to enable the sealing pipe 4 not to seal the water spraying port 201, at the moment, the cooling water is continuously conveyed, so that the cooling water can be uniformly sprayed out of a plurality of water spraying ports 201 on the inner pipe 2, and when the cooling water is stopped to be conveyed, the sliding plate 502 is driven to return under the action of the spring 505, so that the sealing pipe 4 returns to seal the water spraying port 201.
The beneficial effects of the technical scheme are that: through the design of the structure, the cooling water can be automatically and uniformly sprayed out of the plurality of water spraying ports 201 after the inner pipe 2 is filled by the cooling water only by starting the water supply mechanism 1 without manual operation, and the uniformity of spraying into the outer pipe 3 is ensured, so that the uniform heat dissipation of concrete is ensured; and after stopping spraying water, the sealing pipe 4 is convenient to return to close the water spraying port 201.
In one embodiment of the invention, the side of the inner tube 2 away from the water supply mechanism 1 is provided with an annular groove 202, the sealing tube 4 is in limit sliding connection in the annular groove 202, and the sealing tube 4 is connected with the inner wall of the annular groove 202 through an elastic piece 14.
The working principle of the technical scheme is as follows: as shown in fig. 7, after the sealing tube 4 slides through the driving mechanism 5, the elastic member 14 stretches, and after the cooling water is stopped to be delivered, the sliding plate 502 slides through the hinge rod 504 to drive the sealing tube 4 to slide, and the elastic member 14 is arranged to pull the sealing tube 4 to be matched with the sliding plate 502 to enable the sealing tube 4 to return.
The beneficial effects of the technical scheme are that: by the design of the mechanism, the sealing pipe 4 is ensured to return smoothly, and the phenomenon that the water spraying port 201 cannot be closed due to unsmooth return is avoided.
In one embodiment of the present invention, the plurality of water jets 201 are circumferentially arranged on the inner tube 2 in the axial direction of the inner tube 2.
The technical scheme has the working principle and beneficial effects; the cooling water sprayed from the water spraying ports 201 is uniformly sprayed in the outer pipe 3, so that uniform heat dissipation in the process of pouring large-volume concrete is ensured.
In one embodiment of the invention, the inner tube 2 is rotatably mounted on the water supply mechanism 1, and a driving member for driving the inner tube 2 to rotate is mounted on the water supply mechanism 1.
The working principle and the beneficial effects of the technical scheme are as follows: when the water supply mechanism 1 conveys cooling water into the inner pipe 2, the inner pipe 2 is driven to rotate by the driving piece, so that when the cooling water is sprayed out from the water spraying port 201, the water spraying range is further enlarged, and the uniform heat dissipation of concrete is ensured.
A construction method for uniform heat dissipation of mass concrete comprises the following steps:
s1: the heat dissipation device is installed, so that the water supply pipelines are uniformly arranged in the concrete template, and the requirement that the inner pipe 2 can extend out of the concrete template is met;
s2: installing a temperature measuring element for monitoring the temperature of concrete, wherein the arrangement range of monitoring points is that half axis of the plane diagram symmetrical axis of the selected concrete pouring body is used as a test area, and the monitoring points are arranged in layers according to planes in the test area;
s3: pouring concrete, when the concrete is poured to cover one layer of inner pipe 2 and vibration is finished, starting a water supply mechanism 1 to supply cooling water into the inner pipe 2, and after the cooling water fills the inner pipe 2, sliding a sealing pipe 4 to open a water spray port 201, wherein the flow of the cooling water is controlled to be 1.2-1.5 m 3 And/h, the temperature difference between the inlet water and the outlet water monitored by the temperature measuring element is not more than 6 ℃.
The working principle and the beneficial effects of the technical scheme are as follows: through the steps, uniform heat dissipation in the process of pouring large-volume concrete is ensured.
Finally, it is noted that the above-mentioned preferred embodiments are only intended to illustrate rather than limit the invention, and that, although the invention has been described in detail by means of the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (6)
1. A uniform heat dissipation device for mass concrete, the heat dissipation device comprising a water supply mechanism for providing cooling water and a water supply pipeline connected with the water supply mechanism, wherein the water supply pipeline is laid in the concrete side by side, and the uniform heat dissipation device is characterized in that: the water supply pipeline comprises an outer pipe and an inner pipe which is in sliding connection with the outer pipe, an annular gap is reserved between the inner pipe and the outer pipe, the inner pipe extends to the inner side end of the outer pipe to be closed, the inner pipe extends to the outer side end of the outer pipe to be connected with a water outlet of the water supply mechanism, a first end of the outer pipe is in sealing connection with the inner pipe, a second end of the outer pipe is connected with a water inlet of the water supply mechanism, a plurality of water spray ports are arranged on the inner pipe, a sealing pipe is in limiting sliding connection with the outer pipe on the outer wall of the inner pipe, and the water spray ports can be closed or opened by sliding the sealing pipe; the inner pipe is close to the side of the water supply mechanism and is provided with a driving mechanism for driving the sealing pipe to slide, the driving mechanism comprises a fixed pipe, the fixed pipe is fixedly arranged at the top of the inner pipe, the fixed pipe is positioned between the water supply mechanism and the sealing pipe, the fixed pipe is communicated with the inner pipe, the inner side of the fixed pipe is slidably connected with a sliding plate, the sliding plate is arranged in the fixed pipe through a spring, the sliding plate is far away from a connecting rod fixedly connected with the side of the inner pipe, the connecting rod is slidably connected with the fixed pipe, the other end of the connecting rod extends out of the fixed pipe and is hinged with a hinged rod, and the hinged rod is far away from the connecting rod end and is hinged with the sealing pipe.
2. The mass concrete uniform heat dissipation device of claim 1, wherein: the spray nozzle is rotatably arranged on the water spray port, an arc-shaped plate connected with the spray nozzle is slidably connected to the inner side wall of the inner pipe, the arc-shaped plate is fixedly connected with a bar frame, the bar frame is rotatably arranged in the inner pipe, and a bar groove is formed in the bar frame;
the inner side of the inner tube is provided with a rotating wheel capable of converting flowing power into rotating power through a rotating shaft, the rotating shaft is close to the bar frame end and provided with a round wheel, the round wheel is close to the bar frame side center and is connected with a roller, and the roller is slidably connected in the bar groove.
3. The mass concrete uniform heat dissipation device of claim 1, wherein: the side of the inner tube, which is far away from the water supply mechanism, is provided with an annular groove, the sealing tube is in limit sliding connection in the annular groove, and the sealing tube is connected with the inner wall of the annular groove through an elastic piece.
4. The mass concrete uniform heat dissipation device of claim 1, wherein: the water spraying ports are circumferentially arranged on the inner pipe in the axial direction of the inner pipe.
5. The mass concrete uniform heat dissipation device of claim 1, wherein: the inner tube is rotatably arranged on the water supply mechanism, and the water supply mechanism is provided with a driving piece for driving the inner tube to rotate.
6. A construction method for uniform heat dissipation of mass concrete comprises the following steps:
s1: installing the heat dissipating device according to any one of claims 1-5, so that the water supply pipes are uniformly arranged in the concrete form, wherein the requirement that the inner pipe can extend out of the concrete form is satisfied;
s2: installing a temperature measuring element for monitoring the temperature of concrete, wherein the arrangement range of monitoring points is that half axis of the plane diagram symmetrical axis of the selected concrete pouring body is used as a test area, and the monitoring points are arranged in layers according to planes in the test area;
s3: and pouring concrete, namely after the concrete is poured to cover one layer of inner pipe and is vibrated, starting a water supply mechanism to convey cooling water into the inner pipe, and after the cooling water fills the inner pipe, sliding a sealing pipe to open a water spray port, wherein the flow rate of the cooling water is controlled to be 1.2-1.5 m/h, and the temperature difference between water inlet and water outlet monitored by a temperature measuring element is not more than 6 ℃.
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