Box girder formwork for bridge

Abstract

The utility model discloses a box girder formwork for a bridge, which belongs to the technical field of box girder formworks and is characterized by comprising a box girder outer formwork body, a plurality of supports are fixedly connected to the front side and the rear side of the box girder outer formwork body respectively, supporting plates are fixedly connected to the tops of the supports, a movable frame is arranged at the top of the box girder outer formwork body, and the movable frame is fixedly connected to the front side and the rear side of the box girder outer formwork body. A storage box is fixedly connected to the surface of the moving frame, and a cleaning mechanism is arranged on the right side of the moving frame; the cleaning mechanism comprises two handles, a plurality of connecting pins and a scraper, and the problems that when most existing box girder outer formworks are used, due to the fact that the box girder outer formworks are in an inward concave shape and can easily receive impurities and dust, cleaning of the inner wall needs to be conducted by workers, the impurities are prevented from affecting the pouring effect of a bridge box girder, and the service life of the box girder outer formworks is prolonged are solved. Due to the fact that the bridge outer formwork is large in size, cleaning of the inner wall of the box girder outer formwork is time-consuming and labor-consuming, and the pouring efficiency of the bridge box girder is reduced.

Description

Technical Field

[0001] This utility model relates to the field of box girder formwork technology, and in particular to a box girder formwork for bridges. Background Technology

[0002] Box girder formwork is a large-scale formwork support structure system used for casting bridge box girders. During use, the inside of the box girder formwork needs to be cleaned and coated with a release agent to prevent dust, oil, concrete residue, and other impurities from affecting the casting process and to facilitate demolding. Existing precast box girder inner molds and formwork have the following drawbacks: After the current box girder is precast, the existing inner molds and formwork need to be dismantled by workers before the box girder can be removed. When precasting the next set of box girders, there is the cumbersome problem of having to reinstall the formwork and inner mold.

[0003] The existing patent (publication number: CN221271516U) discloses a precast box girder inner mold structure. The precast box girder formwork is composed of an outer mold and an inner mold that are spliced ​​together by lifting and opening. After the box girder is cast and solidified, the inner mold and the template can be quickly demolded and removed from the box girder, which can effectively improve the efficiency of box girder production.

[0004] To address the aforementioned issues, existing patents offer solutions. Currently, most box girder external formwork systems, due to their concave shape, easily accumulate impurities and dust. Therefore, cleaning the inner walls requires manual sweeping to prevent these impurities from affecting the bridge box girder casting process. Because the bridge external formwork is quite large, cleaning the inner walls is time-consuming and labor-intensive, reducing the efficiency of bridge box girder casting. Utility Model Content

[0005] The purpose of this utility model is to provide a box girder formwork for bridges, which can solve the problem that manual cleaning of the inner wall of the outer formwork of the box girder is time-consuming and laborious, thus reducing the efficiency of bridge box girder casting.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a box girder formwork for bridges, comprising an outer box girder formwork, wherein several supports are fixedly connected to the front and rear sides of the outer box girder formwork, a support plate is fixedly connected to the top of the supports, a movable frame is provided on the top of the outer box girder formwork, a storage box is fixedly connected to the surface of the movable frame, and a cleaning mechanism is provided on the right side of the movable frame;

[0007] The cleaning mechanism includes two handles, several connecting pins, and a scraper. The surface of the connecting pins is fixedly connected to the surface of the scraper. The side of the handle near the connecting pin is fixedly connected to the connecting pin. The surface of the scraper is in contact with the inner wall of the outer formwork of the box girder. The scraper is made of hard rubber.

[0008] Preferably, the surface of the movable frame is fixedly connected with a connecting block, and the number of connecting blocks is several and evenly distributed on the surface of the movable frame. The connecting pin is movably inserted into the inside of the right-side connecting block.

[0009] Preferably, the front and rear sides of the movable frame are fixedly connected to a fixing plate, and the bottom sides of the fixing plate are rotatably connected to rollers, with the bottom of the rollers contacting the top of the support plate.

[0010] Preferably, the front and rear sides of the top of the mobile frame are fixedly connected with retaining rings.

[0011] Preferably, the top of the mobile frame is provided with a spraying mechanism, which includes a pump body, a fixed pipe, a three-way pipe and several atomizing nozzles. The side of the atomizing nozzles near the fixed pipe is fixedly connected to the fixed pipe. The side of the three-way pipe near the fixed pipe is fixedly connected to the fixed pipe. The side of the three-way pipe near the pump body output end is fixedly connected to the pump body output end. The bottom of the pump body input end passes through the storage box and extends into the interior of the storage box. The bottom of the pump body is fixedly connected to the top of the storage box. The surface of the fixed pipe is fixedly connected to the surface of the outer formwork of the box girder.

[0012] Preferably, a water injection pipe is fixedly connected to the top of the storage box, and a cover is provided on the top of the water injection pipe, the surface of which is threadedly connected to the inner wall of the water injection pipe.

[0013] Preferably, both sides of the bottom of the support plate are fixedly connected to support legs, and both sides of the top of the support plate are fixedly connected to stop blocks.

[0014] Preferably, the top of the storage box is provided with air holes.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This application sets up a cleaning mechanism that allows the mobile frame to move easily by simply connecting an external pull rope to a fixed ring and then pulling the external pull rope. While the mobile frame is moving, a scraper cleans the inner wall of the box girder's outer formwork, removing dust and impurities from the inner wall of the box girder's outer formwork, thus reducing the labor required for cleaning dust and impurities from the inner wall of the box girder's outer formwork.

[0017] 2. By setting up a nozzle mechanism, this application allows the pump to operate simultaneously with the movement of the mobile frame via an external controller. This enables the atomizing nozzle to spray out the external release agent added inside the storage tank, cleaning dust and impurities from the inner wall of the box girder's outer mold while simultaneously applying the release agent. This further improves work efficiency and avoids affecting the casting efficiency of the bridge box girder. Attached Figure Description

[0018] Figure 1This is an overall structural diagram of the box girder formwork for bridges according to this utility model;

[0019] Figure 2 This is a three-dimensional connection diagram of the movable frame and the storage box in this utility model;

[0020] Figure 3 This is a three-dimensional connection diagram of the nozzle mechanism in this utility model;

[0021] Figure 4 This is a three-dimensional connection diagram of the cleaning mechanism in this utility model;

[0022] Figure 5 This is a three-dimensional exploded view of the cover and water injection pipe in this utility model;

[0023] Figure 6 This is a three-dimensional structural diagram of the bottom of the fixing plate in this utility model.

[0024] In the diagram, 1. Box girder outer formwork; 2. Support plate; 3. Movable frame; 4. Stop block; 5. Support leg; 6. Connecting plug; 7. Storage box; 8. Spraying mechanism; 801. Pump body; 802. Fixed pipe; 803. T-pipe; 804. Atomizing nozzle; 9. Cleaning mechanism; 901. Handle; 902. Connecting pin; 903. Scraper; 10. Fixing ring; 11. Fixing plate; 12. Cover; 13. Water injection pipe; 14. Air hole; 15. Roller; 16. Support. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-6 The present invention provides the following technical solution:

[0027] A box girder formwork for bridges includes an outer box girder formwork 1. Several supports 16 are fixedly connected to the front and rear sides of the outer box girder formwork 1. Support plates 2 are fixedly connected to the top of the supports 16. A movable frame 3 is provided on the top of the outer box girder formwork 1. A storage box 7 is fixedly connected to the surface of the movable frame 3. A cleaning mechanism 9 is provided on the right side of the movable frame 3.

[0028] The cleaning mechanism 9 includes two handles 901, several connecting pins 902 and a scraper 903. The surface of the connecting pins 902 is fixedly connected to the surface of the scraper 903. The side of the handle 901 near the connecting pin 902 is fixedly connected to the connecting pin 902. The surface of the scraper 903 is in contact with the inner wall of the outer mold of the box girder 1. The scraper 903 is made of hard rubber.

[0029] In this embodiment: the outer formwork 1 of the box girder is stably supported by the bracket 16, the support plate 2 can support the roller 15, the stop block 4 of the support plate 2 restricts the displacement of the moving frame 3, and the moving frame 3 rolls on the support plate 2 by the roller 15. Before construction, the external release agent is added to the storage tank 7 through the water injection pipe 13 and the cover 12 is tightened. During cleaning, the external pull rope is used to attach the fixing ring 10 and pull it to the right. At this time, the hard rubber scraper 903 moves to scrape off the impurities and dust on the inner wall of the outer formwork 1 of the box girder. At the same time, the workers use the external controller to start the pump 801 to draw the external release agent inside the storage tank 7 through the three-way pipe 803 and the fixing pipe 802, and spray it evenly on the cleaned area after the scraper 903 has scraped off by the atomizing nozzle 804. The cleaning and spraying of the release agent are synchronized, which greatly improves efficiency. Before the moving frame 3 moves to the left, it needs to be manually... The scraper 903 connecting pin 902 is pulled out from the right connecting block 6 and inserted into the left connecting block 6 to ensure that the atomizing nozzle 804 accurately sprays the external release agent onto the area cleaned by the scraper 903. The air hole 14 of the storage box 7 balances the air pressure to assist in the extraction and spraying of the release agent. In this way, the workers can complete the cleaning and spraying of the release agent on the inner wall of the box girder outer formwork 1 by simply pulling the external rope, reducing labor intensity. This solves the problem that when most existing box girder outer formworks are used, the concave shape of the box girder outer formwork makes it easy to collect impurities and dust. Therefore, the inner wall needs to be cleaned by workers to avoid impurities affecting the bridge box girder casting effect. Since the bridge outer formwork is large in size, cleaning the inner wall of the box girder outer formwork is time-consuming and laborious, reducing the casting efficiency of the bridge box girder.

[0030] Specifically, such as Figure 2 and Figure 4 As shown, a number of connecting blocks 6 are fixedly connected to the surface of the movable frame 3 and are evenly distributed on the surface of the movable frame 3. The connecting pin 902 is movably inserted into the inside of the connecting block 6 on the right side.

[0031] Specifically, such as Figure 2 and Figure 6 As shown, the front and rear sides of the movable frame 3 are fixedly connected to a fixed plate 11, and the bottom sides of the fixed plate 11 are rotatably connected to rollers 15, with the bottom of the rollers 15 contacting the top of the support plate 2.

[0032] Specifically, such as Figure 2 As shown, fixing rings 10 are fixedly connected to the front and rear sides of the top of the mobile frame 3.

[0033] In this embodiment: by inserting the connecting pin 902 into the connecting block 6, the scraper 903 can move with the movement of the moving frame 3, thereby facilitating the scraping of dust and impurities on the inner wall of the box girder outer mold 1. By using an external pull rope to be bolted to the front and rear fixing rings 10 on the top of the moving frame 3, pulling the pull rope makes the moving frame 3 move to the right. The roller 15 is rotated and connected to the bottom of the fixing plate 11. The fixing plate 11 is fixedly connected to the moving frame 3, which makes the movement of the moving frame 3 smoother.

[0034] Specifically, such as Figure 2 and Figure 3 As shown, a spraying mechanism 8 is provided on the top of the mobile frame 3. The spraying mechanism 8 includes a pump body 801, a fixed pipe 802, a three-way pipe 803, and several atomizing nozzles 804. The side of the atomizing nozzle 804 near the fixed pipe 802 is fixedly connected to the fixed pipe 802. The side of the three-way pipe 803 near the fixed pipe 802 is fixedly connected to the fixed pipe 802. The side of the three-way pipe 803 near the output end of the pump body 801 is fixedly connected to the output end of the pump body 801. The bottom of the input end of the pump body 801 passes through the storage box 7 and extends into the interior of the storage box 7. The bottom of the pump body 801 is fixedly connected to the top of the storage box 7. The surface of the fixed pipe 802 is fixedly connected to the surface of the outer formwork 1 of the box beam.

[0035] Specifically, such as Figure 5 As shown, a water injection pipe 13 is fixedly connected to the top of the storage box 7, and a cover 12 is provided on the top of the water injection pipe 13. The surface of the cover 12 is threadedly connected to the inner wall of the water injection pipe 13.

[0036] In this embodiment: by adding the external release agent into the storage tank 7 through the water injection pipe 13, and then tightening the cover 12, after the moving frame 3 moves, the scraper 903 scrapes away the dust and impurities on the inner wall of the box girder outer mold 1. The pump body 801 is controlled by the external controller to work, and the pump body 801 extracts the release agent in the storage tank 7 and delivers it to the fixed pipe 802 through the three-way pipe 803. Then, through a number of atomizing nozzles 804 evenly distributed on the surface of the fixed pipe 802, the external release agent is evenly sprayed onto the inner wall of the box girder outer mold 1 cleaned by the scraper 903.

[0037] Specifically, such as Figure 1 As shown, support legs 5 are fixedly connected to both sides of the bottom of the support plate 2, and blocks 4 are fixedly connected to both sides of the top of the support plate 2.

[0038] Specifically, such as Figure 5 As shown, the top of the storage box 7 has an air hole 14.

[0039] In this embodiment: the support leg 5 can stably support the part of the support plate 2 that protrudes from the bracket 16, the stop block 4 can prevent the roller 15 from separating from the support plate 2, and the air hole 14 opened on the top of the storage box 7 can balance the air pressure inside the storage box 7, ensuring that the extraction and spraying process of the external release agent inside the storage box 7 proceeds smoothly.

[0040] Working principle: The outer formwork 1 of the box girder is stably connected to the top support plate 2 by multiple supports 16 on the front and rear sides. The two side legs 5 at the bottom of the support plate 2 are supported on the ground to ensure the stability of the outer formwork 1. The two side blocks 4 on the top of the support plate 2 are used to limit the excessive displacement of the moving frame 3 and ensure the safe operation of the equipment. The moving frame 3 rolls on the top of the support plate 2 through the rollers 15 rotatably connected to the bottom of the front and rear fixed plates 11 to achieve smooth movement. In the early stage of construction, the workers add external release agent to the storage box 7 through the water injection pipe 13, and then tighten the cover 12. When cleaning the inner wall of the outer formwork 1 of the box girder, the external pull rope is bolted to the front and rear fixed rings 10 on the top of the moving frame 3 and pulled. The external pull rope moves the movable frame 3 to the right. At this time, the scraper 903 moves synchronously with the movable frame 3. Because the scraper 903 is made of hard rubber and is in close contact with the surface of the box girder outer mold 1, it can effectively scrape away impurities and dust that have accumulated on the inner wall of the box girder outer mold 1 over a long period. During the cleaning process as the movable frame 3 moves to the right, the operator uses an external controller to start the pump 801. The pump 801 extracts the release agent from the storage tank 7 and delivers it through the three-way pipe 803 to the fixed pipe 802. Then, through several evenly distributed atomizing nozzles 804 on the surface of the fixed pipe 802, the external release agent is evenly sprayed onto the inner wall of the box girder outer mold 1 after being cleaned by the scraper 903. This process is the same as the cleaning work. This step-by-step process greatly improves work efficiency and avoids delays in bridge box girder casting. When the moving frame 3 needs to be pulled to the left, the worker needs to manually move the scraper 903, hold the handle 901, pull the connecting pin 902 out from the right connecting block 6, and then insert the connecting pin 902 into the left connecting block 6. This ensures that when the moving frame 3 moves to the left, the atomizing nozzle 804 accurately sprays the release agent onto the area just scraped and cleaned by the scraper 903. In addition, the air hole 14 on the top of the storage box 7 can balance the air pressure inside the storage box 7, ensuring the smooth extraction and spraying of the external release agent inside the storage box 7, cleaning the outer mold of the box girder. Simultaneously, the release agent can be sprayed on the inner wall. Workers only need to pull the external rope bolted to the fixing ring 10. There is no need for workers to constantly swing their arms to clean dust and impurities and spray the release agent, which reduces labor and improves the casting efficiency of bridge box girders. This solves the problem that most existing box girder external formwork frames are concave in shape and easily collect impurities and dust. Therefore, the inner wall needs to be cleaned by workers to avoid impurities affecting the casting effect of bridge box girders. Due to the large volume of the bridge external formwork frame, cleaning the inner wall of the box girder external formwork frame is time-consuming and laborious, which reduces the casting efficiency of bridge box girders.

[0041] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A box girder formwork for bridges, comprising an outer formwork body for the box girder, characterized in that: Several supports are fixedly connected to the front and rear sides of the outer formwork of the box girder. A support plate is fixedly connected to the top of the support. A movable frame is provided on the top of the outer formwork of the box girder. A storage box is fixedly connected to the surface of the movable frame. A cleaning mechanism is provided on the right side of the movable frame. The cleaning mechanism includes two handles, several connecting pins, and a scraper. The surface of the connecting pins is fixedly connected to the surface of the scraper. The side of the handle near the connecting pin is fixedly connected to the connecting pin. The surface of the scraper is in contact with the inner wall of the outer formwork of the box girder.

2. The box girder formwork for bridges according to claim 1, characterized in that: The surface of the movable frame is fixedly connected with several connecting blocks, which are evenly distributed on the surface of the movable frame. The connecting pin is movably inserted into the inside of the right-side connecting block.

3. The box girder formwork for bridges according to claim 1, characterized in that: The front and rear sides of the movable frame are fixedly connected to fixed plates, and the bottom sides of the fixed plates are rotatably connected to rollers, with the bottom of the rollers contacting the top of the support plate.

4. A box girder formwork for bridges according to claim 1, characterized in that: The front and rear sides of the top of the mobile frame are fixedly connected with retaining rings.

5. A box girder formwork for bridges according to claim 1, characterized in that: The top of the mobile frame is equipped with a spraying mechanism, which includes a pump body, a fixed pipe, a three-way pipe, and several atomizing nozzles. The side of the atomizing nozzles near the fixed pipe is fixedly connected to the fixed pipe. The side of the three-way pipe near the fixed pipe is fixedly connected to the fixed pipe. The side of the three-way pipe near the pump body output end is fixedly connected to the pump body output end. The bottom of the pump body input end passes through the storage box and extends into the interior of the storage box. The bottom of the pump body is fixedly connected to the top of the storage box. The surface of the fixed pipe is fixedly connected to the surface of the outer formwork of the box girder.

6. A box girder formwork for bridges according to claim 1, characterized in that: The top of the storage box is fixedly connected to a water injection pipe, and a cover is provided on the top of the water injection pipe. The surface of the cover is threadedly connected to the inner wall of the water injection pipe.

7. A box girder formwork for bridges according to claim 1, characterized in that: Both sides of the bottom of the support plate are fixedly connected to support legs, and both sides of the top of the support plate are fixedly connected to stop blocks.

8. A box girder formwork for bridges according to claim 1, characterized in that: The top of the storage box has an air vent.

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