CN212404772U

CN212404772U - Concrete box girder applying refrigeration stirrups

Info

Publication number: CN212404772U
Application number: CN202021538958.3U
Authority: CN
Inventors: 吴旻; 郭一彬
Original assignee: Wuyi University
Current assignee: Wuyi University
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2021-01-26
Anticipated expiration: 2030-07-29

Abstract

The utility model discloses a concrete box girder applying a refrigeration stirrup, which comprises a box girder, an evaporation tube, a water inlet tube and a water removal assembly, wherein a plurality of steel bars are arranged on the box girder in the circumferential direction; the evaporation tube is connected to the outer sides of the plurality of reinforcing steel bars in a surrounding manner, and the input end of the evaporation tube is higher than the output end of the evaporation tube; the output end of the water inlet pipe is connected with the input end of the evaporation pipe, and the water inlet pipe is connected with a three-way valve; the dewatering component is provided with a water sealing cavity, the output end of the evaporation tube is connected with the water sealing cavity through a recovery tube, the water sealing cavity is connected with a first pipeline, the first pipeline extends upwards and is communicated with the input end of the evaporation tube, the first pipeline and the evaporation tube are combined to be used for hooping the connecting reinforcing steel bars, and the lower end of the first pipeline is connected with a molecular sieve. The utility model discloses an use concrete box girder of refrigeration stirrup to cool down the structure through the evaporation tube formula stirrup, effectively reduce the difference in temperature stress, guarantee that the bearing capacity of box girder satisfies the requirement, increase of service life.

Description

Concrete box girder applying refrigeration stirrups

Technical Field

The utility model belongs to the technical field of the civil engineering technique and specifically relates to an use concrete box girder of refrigeration stirrup.

Background

The box body structure is widely applied to bridge structures due to the advantages of large torsional rigidity, uniform internal force distribution and the like; because the heat transfer performance of the concrete material is poor, the concrete box structure is influenced by environmental factors such as air temperature or sunshine, the temperature change of the surface of the structure is fast, the temperature change of the inside of the structure is slow, and the temperature difference between the surface and the inside of the concrete box structure is too large, so that temperature difference stress is generated, the structure is cracked, the bearing capacity is reduced, the service life is shortened, and the damage is more serious along with the increase of the size of the box structure. The stirrup in the concrete box structure is a steel bar which is used for meeting the oblique section shear strength of the structure and connecting a stressed main bar and a compression area mixed bar framework, and plays an important role in the structure.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an use concrete box girder of refrigeration stirrup, an use concrete box girder of refrigeration stirrup effectively reduces the difference in temperature stress through the evaporation tube formula stirrup and cools down the structure, guarantees that the bearing capacity of case roof beam meets the demands, increase of service life.

According to the utility model discloses use concrete box girder of refrigeration stirrup, include: the box girder is circumferentially provided with a plurality of reinforcing steel bars; the evaporation tube is connected to the outer sides of the reinforcing steel bars in a surrounding mode, and the input end of the evaporation tube is higher than the output end of the evaporation tube; the water inlet pipe is arranged on the outer side of the box girder, the output end of the water inlet pipe is connected with the input end of the evaporation pipe, and the water inlet pipe is connected with a three-way valve; the dewatering component is arranged outside the box girder, the dewatering component is located below the evaporation pipe, the dewatering component is provided with a water sealing cavity, the output end of the evaporation pipe is connected with the water sealing cavity through a recycling pipe, the water sealing cavity is connected with a first pipeline, the first pipeline extends upwards and is communicated with the input end of the evaporation pipe, the first pipeline is combined with the evaporation pipe to form a stirrup and is connected with the reinforcing steel bar in a hooping manner, the lower end of the first pipeline is connected with a molecular sieve, the molecular sieve is used for limiting water vapor to pass through, and the dewatering component is used for absorbing water vapor.

The technical scheme at least has the following beneficial effects: the first pipeline and the evaporation pipe with the refrigeration function are combined to form a stirrup and the stirrup is tightly connected to the reinforcing steel bar, so that the traditional steel stirrup is replaced, the integral structure of the box girder can be cooled, and the temperature difference stress is effectively reduced; the evaporation pipe is mainly used for refrigerating through water heat absorption evaporation, air in the evaporation pipe is extracted from the three-way valve to form vacuum, hydrogen is filled into the evaporation pipe, the partial pressure of water vapor in the evaporation pipe is zero, liquid water is supplied into the evaporation pipe through the water inlet pipe, the liquid water absorbs heat and evaporates due to the fact that the partial pressure of the water vapor in the evaporation pipe is zero, heat exchange is carried out between the evaporation pipe and the interior of the box girder, the box girder is cooled, the liquid water flows to the output end of the evaporation pipe and continues to absorb heat and evaporate, the box girder is continuously cooled, after the water evaporates, the volume of gas in the evaporation pipe expands, the pressure is increased, the gas is driven to move to the water sealing cavity through the recovery pipe, after the gas reaches the water sealing cavity, the water vapor gradually tends to the supersaturated state from the unsaturated state, redundant water vapor is condensed into liquid water in the water sealing cavity, and the hydrogen moves upwards through the, carry out next refrigeration cycle, realize continuously cooling, utilize water heat absorption evaporation to cool down to the case roof beam, effectively reduce the difference in temperature stress, ensure bearing capacity, increase of service life.

According to some embodiments of the invention, the evaporation tube is provided with water-absorbing fibers.

According to some embodiments of the utility model, the evaporating pipe is provided with a plurality ofly, a plurality of the evaporating pipe is followed the length direction array arrangement of case roof beam.

According to some embodiments of the invention, the evaporation tube is a steel tube.

According to some embodiments of the utility model, the dewatering subassembly includes first water tank and second water tank, first water tank place in the second water tank, the second water tank has the upper shed, the second water tank passes through the third pipe connection the input of inlet tube, third pipe connection have first ooff valve, the lower extreme of first water tank is provided with the under shed, the under shed intercommunication first water tank with the second water tank, the under shed is connected with the second ooff valve, form the water-tight chamber in the first water tank.

According to some embodiments of the invention, the side of the second water tank is provided with a sun visor.

According to some embodiments of the invention, the input of inlet tube is connected with the third ooff valve.

According to some embodiments of the utility model, the water inlet pipe is connected with U type return bend, U type return bend is located the downside of inlet tube.

According to some embodiments of the utility model, the concrete box girder still includes hydrogen manufacturing installation, hydrogen manufacturing installation sets up the outside of box girder, hydrogen manufacturing installation includes third water tank, anode block, negative pole piece, collection cover and outside DC power supply, hydrogen manufacturing electrolyte has been put in the third water tank, the anode block with the negative pole piece interval sets up in the third water tank, the anode block is connected outside DC power supply's positive pole, the negative pole piece is connected outside DC power supply's negative pole, it establishes to collect the cover the top of negative pole piece, it passes through the second pipe connection to collect the cover the water-tight chamber, be provided with the fourth switch valve on the second pipeline.

According to some embodiments of the invention, the external dc power supply is a solar panel.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a cross-sectional view of a concrete box girder according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of an evaporator tube according to an embodiment of the present invention;

fig. 3 is the embodiment of the present invention, which is a schematic structural diagram of a concrete box girder.

Reference numerals:

box girder 100, steel bar 110;

an evaporation tube 200, a recovery tube 210, and water absorbing fibers 220;

a water inlet pipe 300, a three-way valve 310, a third on-off valve 320 and a U-shaped bent pipe 330;

the water removal assembly 400, a first pipeline 410, a molecular sieve 411, a first water tank 420, a water sealing cavity 421, a lower opening 422, a second switch valve 423, a second water tank 430, an upper opening 431, a third pipeline 432, a first switch valve 433 and a sun shield 434;

hydrogen production apparatus 500, third water tank 510, anode block 520, cathode block 530, collection cover 540, external dc power supply 550, second pipe 560, fourth switch valve 561.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1, an embodiment of the present invention provides a concrete box girder using a refrigeration stirrup, including a box girder 100 for bearing a bridge main body, a plurality of reinforcing bars 110 are arranged in the box girder 100 in the circumferential direction, an evaporation tube 200 is connected around the outer side of the plurality of reinforcing bars 110, the evaporation tube 200 is used for tightening the reinforcing bars 110 on the one hand, and is used for evaporation and heat absorption on the other hand, the input end of the evaporation tube 200 is higher than the output end of the evaporation tube 200, so that liquid water flows automatically to the output end of the evaporation tube 200, the input end of the evaporation tube 200 is connected with a water inlet tube 300, the water inlet tube 300 is arranged outside the box girder 100, the water inlet tube 300 is used for inputting liquid water into the evaporation tube 200, the output end of the water inlet tube 300 extends into the evaporation tube 200, the water inlet tube 300 is connected with a three-way valve; the output end of the evaporation tube 200 is connected with a water removal assembly 400, the water removal assembly 400 is arranged below the box girder 100 and below the evaporation tube 200, the water removal assembly 400 is used for absorbing water vapor, specifically, the water removal assembly 400 comprises a first water tank 420 and a second water tank 430, the first water tank 420 is arranged in the second water tank 430, the second water tank 430 is provided with an upper opening 431, the second water tank 430 is communicated with the outside and is convenient for heat exchange with the outside, the lower end side wall of the first water tank 420 is provided with a lower opening 422, the lower opening 422 enables the first water tank 420 to be communicated with the second water tank 430, the lower opening 422 is provided with a second switch valve 423 for controlling the water flow speed, the second water tank 430 is connected with the input end of the water inlet tube 300 through a third pipeline 432, a small amount of liquid water is injected into the second water tank 430 to cover the lower opening 422, the upper part of the first water tank 420 forms a water-tight sealed cavity 421, the third pipeline 432 is provided with a first switch valve, the upper end of the water sealing cavity 421 is connected with the output end of the evaporation tube 200 through the recovery tube 210, the upper end of the water sealing cavity 421 is further connected with a first pipeline 410, the first pipeline 410 extends upwards and is communicated with the input end of the evaporation tube 200, the lower end of the first pipeline 410 and the output end of the evaporation tube 200 are bound through iron wires, so that the first pipeline 410 and the evaporation tube 200 are combined to form a stirrup and are tightly bound on the reinforcement bar 110, the lower end of the first pipeline 410 is connected with a molecular sieve 411, and the molecular sieve 411 only allows hydrogen to pass through and limits water vapor to pass through; the water-sealed cavity 421 is connected with a hydrogen production device 500, the hydrogen production device 500 is arranged at the top of the box girder 100, the hydrogen production device 500 is connected with the water-sealed cavity 421 through a second pipeline 560, the hydrogen production device 500 is used for producing high-purity hydrogen and inputting the high-purity hydrogen into the evaporating pipe 200 to provide a stable hydrogen source, and the high-purity hydrogen ensures a good refrigeration effect, specifically, the hydrogen production device 500 comprises a third water tank 510, an anode block 520, a cathode block 530, a collecting cover 540 and an external direct current power supply 550, the anode block 520 is a carbon rod, the cathode block 530 is an iron rod, hydrogen production electrolyte is filled in the third water tank 510, the hydrogen production electrolyte is unsaturated sodium chloride solution, the carbon rod and the iron rod are arranged in the third water tank 510 at intervals and soaked in the unsaturated sodium chloride solution, the carbon rod is connected with the positive pole of the external direct current power supply 550, the iron rod is connected with the negative pole of the external direct current power supply, get the electricity under the field condition of being convenient for, and energy-concerving and environment-protective, can prepare hydrogen according to chemical reaction equation NaCl + H2O ═ circular telegram ═ NaClO + H2 ═ and hydrogen escapes at the iron bar, collect the cover 540 and cover the top of establishing at the iron bar, collect the cover 540 and be used for collecting the hydrogen of preparing, collect the one end of cover 540 top connection second pipeline 560, water-tight chamber 421 is connected to the other end of second pipeline 560 to can provide stable hydrogen source in to evaporating pipe 200, be provided with fourth ooff valve 561 on the second pipeline 560, be convenient for control the velocity of flow of hydrogen.

The first pipeline 410 and the evaporation pipe 200 with the refrigeration function are combined to form a stirrup and are connected to the steel bar 110 in a hooped manner, so that the traditional steel stirrup is replaced, the overall structure of the box girder 100 can be cooled, and the temperature difference stress is effectively reduced; the evaporation tube 200 is mainly refrigerated by water heat absorption evaporation, air in the evaporation tube 200 is extracted from the three-way valve 310 to form vacuum, hydrogen is prepared by the hydrogen production device 500 to be filled into the evaporation tube 200, the partial pressure of water vapor in the evaporation tube 200 is zero, liquid water is supplied into the evaporation tube 200 by the water inlet tube 300, the liquid water absorbs heat and evaporates due to the zero partial pressure of the water vapor in the evaporation tube 200, heat exchange is carried out between the evaporation tube 200 and the inside of the box girder 100, the box girder 100 is cooled, the liquid water flows to the output end of the evaporation tube 200, heat absorption evaporation is continued, the box girder 100 is continuously cooled, after the water evaporation, the volume of gas in the evaporation tube 200 expands, the pressure increases, the gas is driven to move to the water sealing cavity 421 through the recovery tube 210, after the gas reaches the water sealing cavity 421, the water vapor gradually approaches to a supersaturated state from the unsaturated state, and excessive water vapor is condensed into liquid water in the water sealing cavity 421, hydrogen then upwards moves and gets into evaporating pipe 200 through molecular sieve 411 and first pipeline 410, carries out next refrigeration cycle, realizes lasting cooling, utilizes the water heat absorption evaporation in the evaporating pipe 200 to cool down box girder 100, effectively reduces the temperature difference stress, ensures the bearing capacity, increase of service life.

Referring to fig. 2, further, the lower portion of the inside of the evaporation tube 200 is provided with water-absorbing fibers 220, and when viewed from the cross-sectional view of the evaporation tube 200, the inside of the evaporation tube 200 is sequentially provided with the water-absorbing fibers 220, liquid water and hydrogen from bottom to top, the water-absorbing fibers 220 can effectively slow down the flow rate of the liquid water, so that the liquid water inside the evaporation tube 200 can fully absorb heat and evaporate, and the evaporation tube 200 fully exchanges heat with the box girder 100 structure, thereby ensuring the cooling effect.

Referring to fig. 3, further, a plurality of evaporation tubes 200 are provided, the plurality of evaporation tubes 200 are arranged in an array along the length direction of the box girder 100, the input ends of the plurality of evaporation tubes 200 are simultaneously connected to the output end of the water inlet tube 300, that is, the plurality of evaporation tubes 200 share one water inlet tube 300, the output ends of the plurality of evaporation tubes 200 are simultaneously connected to one recovery tube 210, that is, the recovery tube 210 is shared, correspondingly, the number of the first pipelines 410 is the same as that of the evaporation tubes 200, the plurality of first pipelines 410 are connected to the water sealing chamber 421 through one shared tube, each first pipeline 410 and each evaporation tube 200 are combined to form a stirrup and tighten the connection steel bar 110, and the plurality of groups of stirrups improve the structural strength of the box girder 100 on one hand, on the other hand, enable the box girder 100 to be cooled uniformly as a whole, further reduce temperature difference stress, ensure bearing.

Further, the evaporating pipe 200 is the steel pipe, and the steel pipe heat transfer performance is good on the one hand, and the evaporating pipe 200 of being convenient for carries out the heat exchange with case roof beam 100, ensures the cooling effect, and on the other hand, for traditional steel stirrup, uses the steel pipe can save steel, alleviates the dead weight of case roof beam 100 structure.

Referring to fig. 1, a sun shield 434 is disposed on a side surface of the second water tank 430 to prevent direct sunlight, so as to prevent the temperature of the water in the second water tank 430440 from being too high and affecting the cooling effect of the water.

Referring to fig. 1, further, the input end of the water inlet pipe 300 is connected with a third on-off valve 320, which facilitates controlling the water inlet speed of the evaporation pipe 200, and at the same time, the third on-off valve 320 and the second on-off valve 423 cooperate to form a closed annular space in the evaporation pipe 200, and the third on-off valve 320 and the second on-off valve 423 can be closed before installation, which facilitates drawing air in the evaporation pipe 200 from the three-way valve 310 to form a vacuum.

Referring to fig. 1, a U-shaped bent pipe 330 is connected to the water inlet pipe 300, the U-shaped bent pipe 330 is located at the lower side of the water inlet pipe 300, and liquid water is stored in the U-shaped bent pipe 330 to form a water seal, which can prevent hydrogen in the evaporation pipe 200 from escaping.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. A concrete box girder using a refrigeration stirrup, comprising:

a box girder (100) provided with a plurality of reinforcing steel bars (110) in the circumferential direction;

the evaporation tube (200) is connected to the outer sides of the reinforcing steel bars (110) in a surrounding mode, and the input end of the evaporation tube (200) is higher than the output end of the evaporation tube (200);

the water inlet pipe (300) is arranged on the outer side of the box girder (100), the output end of the water inlet pipe (300) is connected with the input end of the evaporation pipe (200), and the water inlet pipe (300) is connected with a three-way valve (310);

the water removing component (400) is arranged outside the box girder (100), the water removing component (400) is located below the evaporation pipe (200), the water removing component (400) is provided with a water sealing cavity (421), the output end of the evaporation pipe (200) is connected with the water sealing cavity (421) through a recovery pipe (210), the water sealing cavity (421) is connected with a first pipeline (410), the first pipeline (410) extends upwards and is communicated with the input end of the evaporation pipe (200), the first pipeline (410) is combined with the evaporation pipe (200) to form a stirrup and is connected with the reinforcement (110) in a hooping manner, the lower end of the first pipeline (410) is connected with a molecular sieve (411), the molecular sieve (411) is used for limiting water vapor to pass through, and the water removing component (400) is used for absorbing water vapor.

2. The concrete box girder applied with the refrigeration stirrup as claimed in claim 1, wherein: and water absorption fibers (220) are arranged in the evaporation tube (200).

3. The concrete box girder applied with the refrigeration stirrup as claimed in claim 1, wherein: the evaporation tube (200) is provided with a plurality of evaporation tubes (200), and the plurality of evaporation tubes (200) are arranged in an array along the length direction of the box girder (100).

4. The concrete box girder applied with the refrigeration stirrup as claimed in claim 1, wherein: the evaporation tube (200) is a steel tube.

5. The concrete box girder applied with the refrigeration stirrup as claimed in claim 1, wherein: the water removal assembly (400) comprises a first water tank (420) and a second water tank (430), the first water tank (420) is placed in the second water tank (430), the second water tank (430) is provided with an upper opening (431), the second water tank (430) is connected with the input end of the water inlet pipe (300) through a third pipeline (432), the third pipeline (432) is connected with a first switch valve (433), the lower end of the first water tank (420) is provided with a lower opening (422), the lower opening (422) is communicated with the first water tank (420) and the second water tank (430), the lower opening (422) is connected with a second switch valve (423), and a water sealing cavity (421) is formed in the first water tank (420).

6. The concrete box girder applied with the refrigeration stirrup as claimed in claim 5, wherein: the side of the second water tank (430) is provided with a sun shield (434).

7. The concrete box girder applied with the refrigeration stirrup as claimed in claim 1, wherein: the input end of the water inlet pipe (300) is connected with a third on-off valve (320).

8. The concrete box girder applied with the refrigeration stirrup as claimed in claim 1, wherein: the water inlet pipe (300) is connected with a U-shaped bent pipe (330), and the U-shaped bent pipe (330) is positioned at the lower side of the water inlet pipe (300).

9. The concrete box girder applied with the refrigeration stirrup as claimed in claim 1, wherein: the concrete box girder also comprises a hydrogen production device (500), the hydrogen production device (500) is arranged outside the box girder (100), the hydrogen production device (500) comprises a third water tank (510), an anode block (520), a cathode block (530), a collecting cover (540) and an external direct current power supply (550), hydrogen-producing electrolyte is stored in the third water tank (510), the anode block (520) and the cathode block (530) are arranged in the third water tank (510) at intervals, the anode block (520) is connected with the anode of the external direct current power supply (550), the cathode block (530) is connected with the negative electrode of the external direct current power supply (550), the collecting cover (540) is covered above the cathode block (530), the collecting cover (540) is connected with the water sealing cavity (421) through a second pipeline (560), and a fourth switch valve (561) is arranged on the second pipeline (560).

10. The concrete box girder applied with the refrigeration stirrup as claimed in claim 9, wherein: the external direct current power supply (550) is a solar panel.