CN115450448A - Mass concrete uniform heat dissipation device and construction method - Google Patents
Mass concrete uniform heat dissipation device and construction method Download PDFInfo
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- CN115450448A CN115450448A CN202211085075.5A CN202211085075A CN115450448A CN 115450448 A CN115450448 A CN 115450448A CN 202211085075 A CN202211085075 A CN 202211085075A CN 115450448 A CN115450448 A CN 115450448A
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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
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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
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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- 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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- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
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- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
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- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a large-volume concrete uniform heat dissipation device 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, when cooling water flows into the inner pipe, the inner pipe is not contacted with concrete, so that heat exchange between the cooling water and the concrete is avoided; the cooling water is ensured to flow into the outer pipe and then the concrete is uniformly radiated.
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
Due to the large volume of the concrete structure, the heat dissipation surface is limited, so that the hydration heat of the cement in the concrete structure is difficult to dissipate in time, and temperature shrinkage cracks are easy to generate under the constraint of the external environment or the internal force of the concrete.
In the conventional technology, cooling water circulation is usually adopted to dissipate heat of concrete, for example, a heat dissipation device for concrete construction disclosed in chinese patent CN 216039320U, a cooling conduit is snakelike arranged in concrete, and a cold water tank is used to convey cooling water into the cooling conduit for heat dissipation.
However, since the concrete span is large in the mass concrete, when cooling water circulates, the front end of the cooling water conveying direction gradually increases the temperature of the cooling water in the conveying process due to heat exchange with the concrete when the cooling water is cooled, so that the cooling effect on the concrete at the rear side of the cooling water conveying direction is reduced, and the heat radiation in the mass concrete is uneven.
Disclosure of Invention
In view of the above, the present invention provides a large-volume concrete uniform heat dissipation device and a construction method thereof, which are used for solving the problem of uneven heat dissipation in the process of pouring large-volume concrete in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a large-volume concrete uniform heat dissipation device which comprises a water supply mechanism for providing cooling water and water supply pipelines connected with the water supply mechanism, wherein the water supply pipelines are laid in concrete side by side, each water supply pipeline comprises an outer pipe and an inner pipe 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 and is arranged in a closed mode, the outer side end of the inner pipe extends to the outer side end of the outer pipe and is 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 sealed mode, the second end of the outer pipe is connected with a water inlet of the water supply mechanism, a plurality of water spray ports are formed in the inner pipe, a sealing pipe is connected to the outer wall of the inner pipe in a limiting sliding mode, the sealing pipe is connected with the outer pipe in a limiting sliding mode, and the sealing pipe can be used for enabling the water spray ports to be closed or opened by sliding.
Further, a nozzle is rotatably mounted on the water spraying port, an arc-shaped plate connected with the nozzle is connected to the inner side wall of the inner tube in a sliding mode, the arc-shaped plate is fixedly connected with a strip-shaped frame, the strip-shaped frame is rotatably mounted in the inner tube, and a strip-shaped groove is formed in the strip-shaped frame;
the inner tube inboard is installed through the pivot and is converted the rotation wheel of rotary power into with mobile power, the pivot is close to bar frame end installs the round wheel, the round wheel is close to bar frame side eccentric connection has the gyro wheel, gyro wheel sliding connection is in the bar inslot.
Further, be close to on the inner tube water supply mechanism side-mounting be used for the drive the gliding actuating mechanism of sealed tube, actuating mechanism includes fixed pipe, fixed pipe fixed mounting be in the inner tube top, fixed pipe is located water supply mechanism with between the sealed tube, 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 mounting and is 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 that fixed pipe articulates there is the hinge bar, the hinge bar is kept away from the connecting rod end with the sealed tube is articulated
Further, the inner tube is kept away from water supply mechanism side and is equipped with the ring channel, the spacing sliding connection of sealed tube is in the ring channel, the sealed tube with connect through the elastic component between the ring channel inner wall.
Further, a plurality of the water jet nozzles are arranged on the inner pipe in a circumferential array in the axial direction of the inner pipe.
Further, the inner tube rotates and installs on water supply mechanism, water supply mechanism is last to drive inner tube pivoted driving piece.
The invention also provides a construction method for uniformly radiating the mass concrete, which comprises the following steps:
s1: installing the heat dissipating device of any of claims 1-6 such that the water supply pipes are uniformly disposed in the concrete form, such that the inner pipes extend outside the concrete form;
s2: installing a temperature measuring element for monitoring the concrete temperature, wherein the arrangement range of monitoring points takes a half axis of a symmetrical axis of a plane diagram of the selected concrete casting as a test area, and the monitoring points are arranged in layers according to the plane in the test area;
S3：pouring concrete, starting a water supply mechanism to convey cooling water into the inner pipe after the concrete is poured to cover one layer of the inner pipe and vibrated, sliding the sealing pipe to open a water spray opening after the inner pipe is filled with the cooling water, wherein the flow of the cooling water is controlled to be 1.2-1.5 m 3 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, when cooling water flows into the inner pipe, the inner pipe is not contacted with concrete, so that heat exchange between the cooling water and the concrete is avoided; after the inner tube is filled with cooling water, the cooling water of the inner tube is sprayed out from the water spray nozzles arranged side by side to the outer tube contacted with concrete through the sliding sealing tube, so that the cooling effect of the cooling water on the concrete after flowing into the outer tube is consistent, and the heat dissipation is uniform in the process of pouring the large-volume concrete.
Additional advantages, objects, and features of the invention will be set forth 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 objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
In order to make the object, technical scheme and beneficial effect of the invention more clear, the invention provides the following drawings for explanation:
FIG. 1 is a front cross-sectional view of a water supply pipe according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a water supply pipeline according to an embodiment of the present invention;
FIG. 3 is a schematic view of the internal structure of the inner tube according to the embodiment of the present invention;
FIG. 4 is an enlarged view of portion B of FIG. 3 according to an embodiment of the present invention;
FIG. 5 is a schematic view of the water supply mechanism installation of the embodiment of the present invention;
FIG. 6 is a front view of an inner tube of an embodiment of the present invention;
fig. 7 is an enlarged view of a portion C of fig. 6 according to an embodiment of the present invention.
The drawings are numbered as follows: 1. a water supply mechanism; 2. an inner tube; 201. a water jet; 202. an annular groove; 3. an outer tube; 4. a sealing tube; 5. a drive mechanism; 501. a fixed tube; 502. a slide plate; 503. a connecting rod; 504. a hinged lever; 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 strip-shaped frame; 13. a strip-shaped groove; 14. an elastic member; 15. concrete template.
Detailed Description
As shown in fig. 1 to 7, the present invention provides a concrete crack-resistant heat dissipation device, comprising: water supply mechanism 1 and with the water supply pipe that water supply mechanism 1 is connected, it is a plurality of water supply pipe lays side by side in the concrete, water supply pipe includes inner tube 2 and outer tube 3, inner tube 2 is installed inside outer tube 3, inner tube 2 with leave annular gap between the outer tube 3, 2 first ends in inner tube are connected with water supply mechanism 1's delivery port, the second end of inner tube 2 seals the setting, the first end of outer tube 3 with 2 sealing connection in inner tube, the second end of outer tube 3 is connected with water supply mechanism 1's water inlet, be equipped with a plurality of water jet 201 on 2 in the inner tube side by side, 2 upper limit sliding connection in inner tube has sealed tube 4, sealed tube 4 with 3 spacing sliding connection in outer tube, the slip 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, the water supply mechanism 1 stores cooling water, after the water supply pipeline is laid in the concrete form 15, when concrete is poured, the length of a plurality of water spray nozzles 201 arranged side by side on the inner pipe 2 is more than that 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, when the inner pipe 2 is filled with the cooling water, the sealing pipe 4 is slid to open the water spray nozzles 201, at this time, the cooling water is uniformly sprayed into the outer pipe 3 from the plurality of water spray nozzles 201, and the concrete is uniformly radiated.
The beneficial effects of the above technical scheme are as follows: by arranging the annular gap between the outer pipe 3 and the inner pipe 2, when cooling water flows into the inner pipe 2, the inner pipe 2 is not contacted with concrete, so that heat exchange between the cooling water and the concrete is avoided; 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 to the outer pipe 3 contacted with concrete through the sliding sealing pipe 4, so that the heat dissipation effect of the cooling water on the concrete after flowing into the outer pipe 3 is consistent, and the heat dissipation is uniform in the process of pouring the large-volume concrete.
In one embodiment of the present invention, a nozzle 6 is rotatably mounted on the water jet 201, an arc plate 7 connected with the nozzle 6 is slidably connected to the inner side wall of the inner tube 2, the arc plate 7 is fixedly connected with a strip-shaped frame 12, the strip-shaped frame 12 is rotatably mounted in the inner tube 2, and the strip-shaped frame 12 is provided with a strip-shaped groove 13;
2 inboards of inner tube install through pivot 9 and to convert mobile power into rotary power's rotation wheel 8, rotation wheel 8 is the turbine form, pivot 9 is close to strip frame 12 ends are installed round wheel 10, round wheel 10 is close to strip frame 12 side eccentric connection has gyro wheel 11, gyro wheel 11 sliding connection be in the strip groove 13.
The working principle of the technical scheme is as follows: like fig. 1, when water supply mechanism 1 carried the cooling water toward inner tube 2, the rivers were through rotating wheel 8, it converts the mobile power of rivers into rotary power to rotate wheel 8, like fig. 4, thereby make and rotate wheel 8 and rotate, thereby drive pivot 9, round wheel 10 rotates, round wheel 10 drives gyro wheel 11 and slides in bar groove 13 when rotating, thereby drive the swing of bar frame 12, thereby drive the arc 7 and slide the swing in inner tube 2, thereby drive shower nozzle 6 and rotate the water spray to outer tube 3.
The beneficial effects of the above technical scheme are as follows: drive shower nozzle 6 through rivers and rotate and spray water to outer tube 3, improved the spraying scope of shower nozzle 6, further guaranteed that the spun water evenly sprays in outer tube 3 from inner tube 2 to further guaranteed that the heat dissipation to the concrete is even.
In an 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 on 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 communicated with the inner tube 2, a sliding plate 502 is slidably 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 far from the inner tube 2, the connecting rod 503 is slidably connected to the fixed tube 501, the other end of the connecting rod 503 extends out of the fixed tube 501 to hinge a hinge rod 504, and the end of the hinge rod 504 far from the connecting rod 503 is hinged to the sealing tube 4.
The working principle of the technical scheme is as follows: as shown in fig. 1, when the water supply mechanism 1 delivers cooling water into the inner tube 2, before the cooling water fills the inner tube 2, the spring 505 is in a normal state, the sealing tube 4 seals the water spray 201, after the cooling water fills the inner tube 2, the cooling water is continuously delivered to make the cooling water flow into the fixed tube 501, so as to squeeze the sliding plate 502, drive the sliding plate 502 to slide upwards, thereby drive the connecting rod 503 to slide upwards, so as to pull the sealing tube 4 through the hinge rod 504 to make the sealing tube 4 not seal the water spray 201, at this time, the cooling water is continuously delivered, so that the cooling water can be uniformly sprayed out from the plurality of water spray 201 on the inner tube 2, when the delivery of the cooling water is stopped, the sliding plate 502 is driven to return under the action of the spring 505, thereby making the sealing tube 4 return to seal the water spray 201.
The beneficial effects of the above technical scheme are that: through the design of the structure, manual operation is not needed, cooling water can be automatically and uniformly sprayed out from the plurality of water spraying ports 201 after the inner pipe 2 is filled with the cooling water only by starting the water supply mechanism 1, and the uniformity of the cooling water sprayed into the outer pipe 3 is ensured, so that the uniform heat dissipation of concrete is ensured; and after the water spraying is stopped, the sealing pipe 4 is convenient to return to seal the water spraying port 201.
In one embodiment of the invention, the inner pipe 2 is provided with an annular groove 202 at the side far away from the water supply mechanism 1, the sealing pipe 4 is connected in the annular groove 202 in a limited sliding manner, and the sealing pipe 4 is connected with the inner wall of the annular groove 202 through an elastic element 14.
The working principle of the technical scheme is as follows: as shown in fig. 7, after the sealing tube 4 slides by the driving mechanism 5, the elastic member 14 stretches, and after the cooling water delivery is stopped, the sealing tube 4 slides by the sliding of the sliding plate 502 via the hinge rod 504, and the sealing tube 4 is returned by the elastic member 14 pulling the sealing tube 4 to match with the sliding plate 502.
The beneficial effects of the above technical scheme are that: through the design of above-mentioned mechanism, guaranteed that the return of sealed tube 4 is smooth, avoided appearing the return and smoothly lead to the unable closure of water jet 201.
In one embodiment of the present invention, a plurality of the water jet ports 201 are circumferentially arranged on the inner pipe 2 in the axial direction of the inner pipe 2.
The working principle and the beneficial effects of the technical scheme are achieved; the cooling water sprayed from the water spray nozzles 201 is uniformly sprayed in the outer pipe 3, so that the heat dissipation uniformity in the process of pouring the large-volume concrete is ensured.
In one embodiment of the present invention, the inner pipe 2 is rotatably mounted on the water supply mechanism 1, and the water supply mechanism 1 is provided with a driving member for driving the inner pipe 2 to rotate.
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 opening 201, the water spraying range is further enlarged, and the uniform heat dissipation of concrete is ensured.
A construction method for uniformly radiating mass concrete comprises the following steps:
s1: installing the heat dissipation device to enable the water supply pipelines to be uniformly arranged in the concrete formwork, wherein the requirement that the inner pipe 2 can extend out of the concrete formwork is met;
s2: installing a temperature measuring element for monitoring the concrete temperature, wherein the arrangement range of monitoring points takes a half axis of a symmetrical axis of a plane diagram of the selected concrete casting as a test area, and the monitoring points are arranged in layers according to the plane in the test area;
s3: pouring concrete, starting the water supply mechanism 1 to deliver cooling water into the inner pipe 2 after the concrete is poured to cover one layer of the inner pipe 2 and vibrated, sliding the sealing pipe 4 to open the water spray opening 201 after the cooling water fills the inner pipe 2, wherein the flow rate of the cooling water is controlled to be 1.2-1.5 m 3 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, the heat dissipation uniformity in the process of pouring the large-volume concrete is ensured.
Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (7)
1. The utility model provides a bulky concrete uniform heat abstractor, heat abstractor includes the water supply mechanism that is used for providing the cooling water and with the water supply pipe that water supply mechanism is connected, water supply pipe lays in the concrete side by side which characterized in that: the water supply pipeline comprises an outer pipe and an inner pipe which is connected with the outer pipe in a sliding mode, 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 and is arranged in a sealed mode, the inner pipe extends to the outer side end of the outer pipe and is 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 sealed mode, the second end of the outer pipe is connected with the water inlet of the water supply mechanism, a plurality of water spraying openings are formed in the inner pipe, a sealing pipe is connected to the outer wall of the inner pipe in a limiting sliding mode, the sealing pipe is connected with the outer pipe in a limiting sliding mode, and the sealing pipe can enable the water spraying openings to be sealed or opened in a sliding mode.
2. The mass concrete uniform heat sink according to claim 1, wherein: the water spraying opening is rotatably provided with a spray head, the inner side wall of the inner pipe is connected with an arc plate connected with the spray head in a sliding manner, the arc plate is fixedly connected with a strip-shaped frame, the strip-shaped frame is rotatably arranged in the inner pipe, and the strip-shaped frame is provided with a strip-shaped groove;
the inner tube is inboard to be installed through the pivot and to be converted into the rotation wheel of rotary power with mobile power, the pivot is close to the round wheel is installed to the bar end, the round wheel is close to bar side eccentric connection has the gyro wheel, gyro wheel sliding connection is in the bar inslot.
3. The mass concrete uniform heat sink according to claim 1, wherein: be close to on the inner tube water supply mechanism side-mounting is used for the drive gliding actuating mechanism of sealed tube, actuating mechanism includes fixed pipe, fixed pipe fixed mounting be in the inner tube top, fixed pipe is located water supply mechanism with between the sealed tube, 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 mounting and is in the fixed tube, the slide is kept away from interior pipe side fixedly connected with connecting rod, the connecting rod with fixed pipe sliding connection, the connecting rod other end extends fixed pipe and articulates there is the hinge bar, the hinge bar is kept away from the connecting rod end with the sealed tube is articulated.
4. The mass concrete uniform heat sink according to claim 1, wherein: the inner tube is kept away from water supply mechanism side and is equipped with the ring channel, the spacing sliding connection of sealed tube is in the ring channel, the sealed tube with connect through the elastic component between the ring channel inner wall.
5. The mass concrete uniform heat sink according to claim 1, wherein: the plurality of water spray nozzles are arranged on the inner pipe in a circumferential array in the axial direction of the inner pipe.
6. The mass concrete uniform heat sink according to claim 1, wherein: the inner tube rotates to be installed on the water supply mechanism, drive on the water supply mechanism inner tube pivoted driving piece.
7. A construction method for uniformly radiating mass concrete comprises the following steps:
s1: installing the heat dissipating device as claimed in any one of claims 1 to 6 such that the water supply pipes are uniformly arranged in the concrete form such that the inner pipes extend outside the concrete form;
s2: installing a temperature measuring element for monitoring the concrete temperature, wherein the arrangement range of monitoring points takes a half axis of a symmetrical axis of a plane diagram of the selected concrete casting as a test area, and the monitoring points are arranged in layers according to the plane in the test area;
s3: pouring concrete, starting a water supply mechanism to convey cooling water into the inner pipe after the concrete is poured to cover one layer of the inner pipe and vibrated, sliding the sealing pipe to open a water spray opening after the inner pipe is filled with the cooling water, wherein the flow of the cooling water is controlled to be 1.2-1.5 m 3 The temperature difference between the inlet water and the outlet water monitored by the temperature measuring element is not more than 6 ℃.
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