Small pre-cast box girder winter maintenance device

Abstract

The application relates to the field of prefabricated box girder maintenance technology, in particular to a small prefabricated box girder winter maintenance device, which comprises a maintenance cover, a steam generator, a spraying pipeline, a water collecting assembly, a water circulating assembly and a sealing assembly; a maintenance cavity for placing a box girder is arranged in the maintenance cover; a steam inlet communicated with the steam generator is arranged at one end of the maintenance cover; the sealing assembly is installed on the maintenance cover and seals the steam inlet; the spraying pipeline is installed at the bottom of the maintenance cover and is communicated with the steam generator; a plurality of spraying ports for spraying steam are arranged on the spraying pipeline; the water collecting assembly is arranged at the top of the maintenance cover and is used for collecting water drops after steam condensation; and the water circulating assembly is used for circulating the water after steam condensation into the steam generator. The sealing assembly reduces heat loss, the water collecting assembly and the water circulating assembly save water, the water consumption and the electricity consumption during box girder maintenance are reduced as a whole, and the box girder maintenance cost is reduced.

Description

Technical Field

[0001] This application relates to the field of precast box girder maintenance technology, and in particular to a small pre-supported box girder winter maintenance device. Background Technology

[0002] After the concrete is produced and poured, the precast box girder is kept warm and moist before the formwork is removed, so that the design strength of the box girder after pouring reaches 40% to meet the conditions for removing the outer formwork.

[0003] When curing pre-supported box girders, a comprehensive curing process is usually carried out using equipment such as warm air blowers, cotton quilts, foam adhesive, and large steam generators. Steam is sprayed onto the box girder, the temperature of the box girder is regulated by warm air blowers, and foam adhesive and cotton are used to keep the pre-supported box girder warm and moist, so as to set constant temperature and humidity conditions for the environment in which the box girder is located.

[0004] However, the maintenance time for box girders is usually no less than 10 hours. During this period, the box girders need to be heated and humidified every 1-2 hours to ensure the environmental conditions, which consumes a huge amount of water and electricity, resulting in the maintenance cost of box girders remaining high. Summary of the Invention

[0005] In order to reduce the water and electricity consumption during box girder maintenance and lower the maintenance cost, this application provides a small pre-supported box girder winter maintenance device.

[0006] The winter curing device for small pre-supported box girders provided in this application adopts the following technical solution:

[0007] A small pre-supported box girder winter maintenance device includes a maintenance hood, a steam generator, a spray pipe, a water collection assembly, a water circulation assembly, and a sealing assembly;

[0008] The curing hood has a curing chamber for placing the box girder. One end of the curing hood has a steam inlet connected to a steam generator. The sealing assembly is installed on the curing hood and is used to seal the steam inlet. The spray pipe is installed at the bottom of the curing hood and is connected to the steam generator. The spray pipe has multiple nozzles for spraying steam. The water collection assembly is located at the top of the curing hood and is used to collect water droplets after steam condensation. The water circulation assembly connects the water collection assembly and the steam generator and is used to circulate the water after steam condensation back to the steam generator.

[0009] By adopting the above technical solutions, the sealing components improve the overall airtightness of the curing cover, thereby reducing heat loss and saving electricity. The water collection component collects the condensed water droplets from the top of the curing cover, which are then circulated back to the steam generator for reuse via the water circulation component, thus saving water consumption. Overall, this reduces the water and electricity consumption during box girder curing, lowering the maintenance cost of the box girder.

[0010] Optionally, the sealing assembly includes a first sealing tube, a second sealing tube, a sealing block, and a control component;

[0011] The first sealing tube is installed on the steam hood and is coaxially arranged with the steam inlet. The second sealing tube is installed at the outlet of the steam generator. The second sealing tube is slidably inserted into the first sealing tube. The inner peripheral wall of the first sealing tube is provided with a first sliding groove for the sealing block to move radially. The outer peripheral wall of the second sealing tube is provided with a second sliding groove for the sealing block to be inserted radially. The control component is used to control the sliding direction of the sealing block.

[0012] By adopting the above technical solution, the gap between the steam generator and the curing hood can be reduced and the gap between the steam generator and the curing hood can be complicated by the insertion method between the first sealing tube and the second sealing tube, thereby reducing heat loss.

[0013] Optionally, the control component includes a control slide rod, a control handle, and a control spring; a third slide groove for sliding the control slide rod is provided inside the first sealing tube along its own axis, the third slide groove being perpendicularly connected to the first slide groove; a fourth slide groove for sliding the control rod along its own axis is provided outside the first sealing tube; the control handle is connected to the control slide rod; the control spring is located in the fourth slide groove and its two ends are respectively connected to the control handle and the first sealing tube; a control inclined surface is provided on the sealing block to slide against the control slide rod, the control inclined surface being inclined towards the axis of the first sealing tube along the direction close to the curing cover.

[0014] By adopting the above technical solution, when the second sealing tube is inserted into the first sealing tube, the control handle is pushed away from the second sealing tube, the control spring retracts, and the sealing block is positioned in the first sliding groove. After the second sealing tube is fully inserted into the first sealing tube, the control handle is released, the control spring retracts, and the control slide rod pushes the sealing block into the second sliding groove, thereby achieving a seal between the steam generator and the curing cover.

[0015] Optionally, the water collection assembly includes a water collection strip and a water collection tank; the top of the curing cover is triangular, the water collection strip is installed on the top of the curing cover and multiple strips are spaced apart from top to bottom, the top of the water collection strip is fixed to the inner top wall of the curing cover, the bottom of the water collection strip is inclined along the direction close to the side wall of the curing cover, the water collection tank is located below the water collection strip and installed on the side wall of the curing cover, and the opening of the water collection tank is upward.

[0016] By adopting the above technical solution, the water collecting strip can accelerate the collection of condensed water vapor, and the condensed water droplets move along the inclined direction of the water collecting strip into the water collection pool for collection.

[0017] Optionally, the water collecting strip is L-shaped, with adjacent water collecting strips arranged alternately on the vertical plane.

[0018] By adopting the above technical solution, the L-shaped water collection strips can guide the condensed water droplets at the top of the curing chamber to fall onto the water collection plate. At the same time, the staggered arrangement of the water collection plates can reduce the number of water droplets that do not flow into the water collection pool, thereby improving the water collection efficiency.

[0019] Optionally, the water circulation assembly includes a water circulation pipe, a water collection tank, and a return water pipe; one end of the water circulation pipe is connected to the water collection pool and the other end is connected to the water collection tank, and one end of the return water pipe is connected to the water collection tank and the other end is connected to the steam generator.

[0020] By adopting the above technical solution, the recovered water can be centrally settled in the water collection tank before being transported to the steam generator, so as to ensure the stability of the water supply at the steam generator.

[0021] Optionally, multiple spray pipes are arranged horizontally at intervals, and a rotating assembly is connected between the multiple spray pipes. The rotating assembly is used to adjust the layout angle of the spray pipes.

[0022] By adopting the above technical solution, the layout angle of the spray pipe is adjusted by rotating the component, thereby adjusting the direction of steam spraying, so as to avoid spraying steam at one position for a long time, thereby improving the uniformity of steam contact with the box girder and improving the maintenance quality.

[0023] Optionally, the rotating assembly includes a rotating bracket, a rotating gear, a rotating rack, and a driving cylinder; the rotating bracket is installed at the bottom of the curing chamber, the spray pipe is rotatably installed on the rotating bracket along its own axis, the rotating gear is coaxially installed on the spray pipe, the rotating rack is horizontally arranged and meshes with the rotating gear, and the driving cylinder is installed on the curing cover and its output shaft is coaxially fixedly connected to the rotating rack.

[0024] By adopting the above technical solution, the rotation of the spray pipe is supported by the rotating bracket, and the rotation of the rotating gear is driven by the rotating rack, thereby driving the spray pipe to rotate to adjust its own steam injection direction.

[0025] Optionally, a heating component is provided inside the curing chamber. The heating component includes a resistance wire installed on the inner wall of the curing cover. A protective cover is provided on the side of the resistance wire facing the curing chamber. The protective cover is installed on the cavity wall of the curing chamber and is made of breathable and water-absorbing material.

[0026] By adopting the above technical solution, the temperature inside the curing cover can be kept constant by the resistance wire. Since the resistance wire is located inside the curing cover, heat loss can be reduced. The protective cover can prevent the resistance wire from coming into contact with water vapor without affecting the heat dissipation of the resistance wire, thus improving the safety performance of the resistance wire.

[0027] Optionally, the outer perimeter of the curing cover is wrapped with an insulation layer, which is composed of geotextile and cotton quilt.

[0028] By adopting the above technical solution, since the use of resistance wire will raise the temperature of the surrounding wall of the curing cover, in order to reduce heat loss, an insulation layer is used to keep the curing cover warm, thereby saving electricity.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. By improving the sealing performance of the entire curing cover through sealing components, heat loss is reduced and electricity is saved. Water collection components and water circulation components enable the water condensed by steam to be recycled, thereby saving water consumption. Overall, the water and electricity consumption during box girder curing is reduced, thus lowering the maintenance cost of box girder.

[0031] 2. After the second sealing tube is fully inserted into the first sealing tube, release the control handle. The control spring retracts, driving the control slide rod to push the sealing block into the second slide groove, thereby achieving a seal between the steam generator and the curing cover.

[0032] 3. The water collecting strip can accelerate the collection of condensed water vapor. The condensed water droplets move along the inclined direction of the water collecting strip into the water collection pool for collection. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0034] Figure 2 This is a cross-sectional structural diagram of an embodiment of this application;

[0035] Figure 3 yes Figure 2 A magnified view of a portion of the six sections;

[0036] Figure 4 This is a schematic diagram showing the cross-sectional structure of the curing cover;

[0037] Figure 5 This is a schematic diagram showing the structure of the rotating component on the maintenance cover.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Curing cover; 11. Curing chamber; 12. Steam inlet; 2. Steam generator; 3. Spray pipe; 31. Spray nozzle; 4. Water collection assembly; 41. Water collection strip; 42. Water collection pool; 5. Water circulation assembly; 51. Water circulation pipe; 52. Water collection tank; 53. Return water pipe; 6. Sealing assembly; 61. First sealing pipe; 62. Second sealing pipe; 63. Sealing block; 64. Control component; 641. Control slide rod; 642. Control handle; 643. Control spring; 65. First slide groove; 66. Second slide groove; 67. Third slide groove; 68. Fourth slide groove; 69. Control inclined plane; 7. Rotating assembly; 71. Rotating bracket; 72. Rotating gear; 73. Rotating rack; 74. Drive cylinder; 8. Heating assembly; 81. Resistance wire; 82. Protective cover; 9. Insulation layer. Detailed Implementation

[0040] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0041] It should be noted that, in the description of this invention, the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0042] This application discloses a winter maintenance device for small pre-supported box girders.

[0043] Reference Figure 1 and Figure 2 The maintenance device includes a maintenance cover 1, a steam generator 2, a spray pipe 3, a water collection assembly 4, a water circulation assembly 5, a sealing assembly 6, and a heating assembly 8.

[0044] The curing cover 1 has a curing chamber 11 for placing the box girder. One end of the curing cover 1 has a steam inlet 12 connected to the steam generator 2. A sealing assembly 6 is installed on the curing cover 1 to seal the steam inlet 12, reducing heat loss. A spray pipe 3 is installed at the bottom of the curing cover 1 and connected to the steam generator 2. The spray pipe 3 has multiple spray nozzles 31 for spraying steam. A water collection assembly 4 is located at the top of the curing cover 1 and collects water droplets after steam condensation. A water circulation assembly 5 connects the water collection assembly 4 and the steam generator 2, circulating the condensed water back to the steam generator 2, thus reusing the condensed water droplets and saving water.

[0045] In addition, the heating assembly 8 is installed on the vertically arranged cavity wall of the curing chamber 11. The heating assembly 8 includes a resistance wire 81 installed on the inner wall of the curing cover 1. A protective cover 82 is provided on the side of the resistance wire 81 facing the curing chamber 11. The protective cover 82 is installed on the cavity wall of the curing chamber 11 and is made of breathable and water-absorbing material. The curing chamber 11 is heated and its temperature is controlled by the resistance wire 81. The heat consumption is low and there is no need for high-power heating at the beginning, saving electricity. The use of the protective cover 82 does not affect heat transfer and prevents steam from directly contacting the resistance wire 81.

[0046] Because the use of resistance wire 81 raises the temperature of the outer wall of the curing cover 1, an insulation layer 9 is wrapped around the outer wall of the curing cover 1 to reduce heat loss. The insulation layer 9 is composed of geotextile and cotton quilt, which insulates the curing cover 1 and saves electricity. In conjunction with the sealing component 6, water collection component 4, and water circulation component 5, the overall water and electricity consumption during box girder curing is reduced, thus lowering the maintenance cost of the box girder.

[0047] Reference Figure 1 and Figure 3 The sealing assembly 6 includes a first sealing tube 61, a second sealing tube 62, a sealing block 63, and a control component 64.

[0048] The first sealing pipe 61 is installed on the steam hood and coaxially arranged with the steam inlet 12, while the second sealing pipe 62 is installed at the outlet of the steam generator 2. When the steam generator 2 and the curing hood 1 are connected, the second sealing pipe 62 is coaxially slidably inserted into the first sealing pipe 61. The inner peripheral wall of the first sealing pipe 61 has a first sliding groove 65 for the radial movement of the sealing block 63, and the outer peripheral wall of the second sealing pipe 62 has a second sliding groove 66 for the radial insertion of the sealing block 63.

[0049] Additionally, the control component 64 includes a control slide 641, a control handle 642, and a control spring 643.

[0050] A third groove 67 is formed inside the first sealing tube 61 along its own axis, allowing the control slide rod 641 to slide. The third groove 67 is perpendicularly connected to the first groove 65. A control inclined surface 69 is formed on the sealing block 63, which slides against the control slide rod 641. The control inclined surface 69 is inclined towards the axis of the first sealing tube 61 in the direction close to the protective cover 1. A fourth groove 68 is formed outside the first sealing tube 61, allowing the control to slide along its own axis. The control handle 642 is connected to the control slide rod 641. The control spring 643 is located in the fourth groove 68, with its two ends connected to the control handle 642 and the first sealing tube 61, respectively.

[0051] When the second sealing tube 62 is inserted into the first sealing tube 61, the control handle 642 is pushed away from the second sealing tube 62, causing the control spring 643 to retract. The sealing block 63 then positions itself in the first groove 65, facilitating the smooth insertion of the second sealing tube 62 into the first sealing tube 61. After the second sealing tube 62 is fully inserted into the first sealing tube 61, the control handle 642 is released. The control spring 643 retracts, causing the control slide rod 641 to pass through the control inclined surface 69, thereby pushing the sealing block 63 into the second groove 66 to achieve a sealing effect between the steam generator 2 and the curing cover 1.

[0052] Reference Figure 2 and Figure 4 The water collection component 4 includes a water collection strip 41 and a water collection pool 42.

[0053] The top of the curing cover 1 is triangular. Multiple water collection strips 41 are installed on the inner top wall of the curing cover 1 at intervals from top to bottom. The water collection pool 42 is located below the water collection strips 41 and installed on the side wall of the curing cover 1, with the opening of the water collection pool 42 facing upwards. The condensed water droplets flow along the inclined direction of the water collection strips 41 into the water collection pool 42 for collection.

[0054] To better collect condensate droplets, the water collection strips 41 are arranged in an L-shape. The top of the water collection strips 41 is fixed to the inner top wall of the curing cover 1, and the bottom of the water collection strips 41 is arranged at an angle close to the side wall of the curing cover 1. Adjacent water collection strips 41 are staggered in the vertical plane. This facilitates faster condensation of water vapor, and the staggered arrangement of the water collection strips 41 reduces the number of water droplets that do not fall onto the water collection pool 42, thereby improving water collection efficiency.

[0055] Reference Figure 2The water circulation component 5 includes a water circulation pipe 51, a water collection tank 52, and a return water pipe 53. One end of the water circulation pipe 51 is connected to the water collection pool 42, and the other end is connected to the water collection tank 52. One end of the return water pipe 53 is connected to the water collection tank 52, and the other end is connected to the steam generator 2. The collected water is centrally settled in the water collection tank 52, and the return water pipe 53 is connected to the top of the water collection tank 52, thereby transporting the settled condensate to the steam generator 2 for recycling, while ensuring a stable water supply at the steam generator 2.

[0056] To avoid prolonged spraying of water vapor at a single location on the box girder, refer to Figure 2 and Figure 5 Multiple spray pipes 3 are horizontally spaced, and rotating components 7 are connected between the multiple spray pipes 3. The rotating components 7 are used to adjust the layout angle of the spray pipes 3 to adjust the direction of steam spraying, thereby improving the uniformity of steam contact with the box girder and improving the maintenance quality.

[0057] The rotating assembly 7 includes a rotating bracket 71, a rotating gear 72, a rotating rack 73, and a drive cylinder 74. The rotating bracket 71 is installed at the bottom of the curing chamber 11, and the spray pipe 3 is rotatably mounted on the rotating bracket 71 along its own axis, thus supporting and guiding the rotation of the spray pipe 3. The rotating gear 72 is coaxially mounted on the spray pipe 3. The rotating rack 73 is horizontally arranged and meshes with the rotating gear 72. The drive cylinder 74 is installed on the curing cover 1, and its output shaft is coaxially and fixedly connected to the rotating rack 73. The rotating rack 73 drives the rotating gear 72 to rotate, thereby causing the spray pipe 3 to rotate and adjust its steam injection direction.

[0058] The implementation principle of a small pre-supported box girder winter maintenance device according to an embodiment of this application is as follows: During the maintenance of the box girder, the maintenance chamber 11 is heated by a resistance wire 81, and heat loss is reduced by an insulation layer 9. The sealing component 6 improves the connection and sealing between the steam generator 2 and the maintenance hood 1 to reduce heat loss and save electricity. The water collection component 4 and the water circulation component 5 can recycle the steam condensate back to the steam generator 2, thereby saving water. Ultimately, the overall water and electricity consumption during box girder maintenance is reduced, thus lowering the maintenance cost of the box girder.

[0059] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A small-scale pre-supported box girder winter curing device, characterized in that: The system includes a curing hood (1), a steam generator (2), a spray pipe (3), a water collection assembly (4), a water circulation assembly (5), and a sealing assembly (6). The curing hood (1) has a curing chamber (11) for placing the box girder. One end of the curing hood (1) has a steam inlet (12) connected to the steam generator (2). The sealing assembly (6) is installed on the curing hood (1) and seals the steam inlet (12). The spray pipe (3) is installed at the bottom of the curing hood (1) and connected to the steam generator (2). The spray pipe (3) has multiple nozzles (31) for spraying steam. The water collection assembly (4) is located on top of the curing hood (1) and is used to collect water droplets after steam condensation. The water circulation assembly (5) connects the water collection assembly (4) and the steam generator (2). The water circulation assembly (5) is used to circulate the water after steam condensation to the steam generator (2). The sealing assembly (6) includes a first sealing pipe (61), a second sealing pipe (62), a sealing block (63), and a control component (64). The first sealing pipe (61) is installed on the steam hood and is coaxially arranged with the steam inlet (12). The second sealing pipe (62) is installed at the outlet of the steam generator (2). A first sealing tube (61) is coaxially slidably inserted. The inner circumferential wall of the first sealing tube (61) has a first groove (65) for radial movement of the sealing block (63). The outer circumferential wall of the second sealing tube (62) has a second groove (66) for radial insertion of the sealing block (63). The control element (64) controls the sliding direction of the sealing block (63). The control element (64) includes a control rod (641), a control handle (642), and a control spring (643). A third groove (67) is formed inside the first sealing tube (61) along its own axial direction for sliding the control rod (641). The third slide groove (67) is vertically connected to the first slide groove (65). The first sealing tube (61) has a fourth slide groove (68) on its outside for control to slide along its own axis. The control handle (642) is connected to the control slide rod (641). The control spring (643) is located in the fourth slide groove (68) and its two ends are respectively connected to the control handle (642) and the first sealing tube (61). The sealing block (63) has a control inclined surface (69) that slides against the control slide rod (641). The control inclined surface (69) is inclined towards the axis of the first sealing tube (61) along the direction close to the curing cover (1).

2. The small pre-supported box girder winter curing device according to claim 1, characterized in that: The water collection assembly (4) includes a water collection strip (41) and a water collection pool (42); The top of the curing cover (1) is triangular. The water collection strips (41) are installed on the top of the curing cover (1) and are arranged at intervals from top to bottom. The top of the water collection strips (41) is fixed to the inner top wall of the curing cover (1). The bottom of the water collection strips (41) is arranged obliquely along the direction close to the side wall of the curing cover (1). The water collection pool (42) is located below the water collection strips (41) and is installed on the side wall of the curing cover (1). The opening of the water collection pool (42) is arranged upward.

3. The small pre-supported box girder winter curing device according to claim 2, characterized in that: The water collection strip (41) is L-shaped, and two adjacent water collection strips (41) are staggered on the vertical plane.

4. A small pre-supported box girder winter curing device according to claim 2, characterized in that: The water circulation component (5) includes a water circulation pipe (51), a water collection tank (52), and a return water pipe (53); one end of the water circulation pipe (51) is connected to the water collection pool (42) and the other end is connected to the water collection tank (52), and one end of the return water pipe (53) is connected to the water collection tank (52) and the other end is connected to the steam generator (2).

5. A small pre-supported box girder winter curing device according to claim 1, characterized in that: The spray pipes (3) are arranged horizontally at multiple intervals, and a rotating component (7) is connected between the multiple spray pipes (3). The rotating component (7) is used to adjust the layout angle of the spray pipes (3).

6. A small pre-supported box girder winter curing device according to claim 5, characterized in that: The rotating assembly (7) includes a rotating bracket (71), a rotating gear (72), a rotating rack (73), and a driving cylinder (74); the rotating bracket (71) is installed at the bottom of the curing chamber (11), the spray pipe (3) is rotatably installed on the rotating bracket (71) along its own axis, the rotating gear (72) is coaxially installed on the spray pipe (3), the rotating rack (73) is horizontally arranged and meshes with the rotating gear (72), and the driving cylinder (74) is installed on the curing cover (1) and its output shaft is coaxially fixedly connected to the rotating rack (73).

7. A small pre-supported box girder winter curing device according to claim 1, characterized in that: The curing chamber (11) is provided with a heating component (8). The heating component (8) includes a resistance wire (81) installed on the inner side wall of the curing cover (1). The resistance wire (81) is provided with a protective cover (82) on the side facing the curing chamber (11). The protective cover (82) is installed on the cavity wall of the curing chamber (11) and is made of breathable and water-absorbing material.

8. A small pre-supported box girder winter curing device according to claim 1, characterized in that: The outer perimeter of the curing cover (1) is covered with an insulation layer (9), which is composed of geotextile and cotton quilt.

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