Polishing device for U-shaped aqueduct inner mold

Abstract

The utility model discloses a polishing device for a U-shaped aqueduct inner mold, which belongs to the field of polishing equipment and comprises a driving belt pulley, a driven belt pulley and a polishing belt wound between the driving belt pulley and the driven belt pulley. The driving belt pulley is slidably arranged on a rail extending along the axis of the inner mold on the side face of the top of the inner mold through a supporting seat, and the driven belt pulley reaches the bottom of the aqueduct through a gap between the outer wall of the inner mold after inward shrinkage and the inner wall of the poured aqueduct and enables the polishing belt to be tightly attached to the outer wall of the inner mold under the action of gravity. The device can be suitable for a narrow space, the spiral roller can generate axial moving force when rotating along with the driven belt pulley, the whole device can move by being matched with a driving mechanism of the driving belt pulley, and therefore movable grinding of the inner mold is achieved, and compared with a traditional mode that a worker holds an angle grinder to conduct grinding, the device is safe to use and high in practicability. And the time cost, the labor cost and the operation difficulty can be greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of grinding equipment, and in particular to a grinding device for the inner mold of a U-shaped trough. Background Technology

[0002] As a water conveyance structure in hydraulic engineering, aqueducts have high requirements for the seepage and leakage prevention of their curved surfaces. To ensure the quality of aqueduct concrete pouring, the inner formwork needs to be cleaned and ground before each pour to prevent residual concrete from affecting subsequent pours. Furthermore, the grinding quality of the inner formwork determines the efficiency and appearance quality of the pouring process. Aqueduct inner formwork is mostly curved steel formwork. Traditionally, grinding involves manual labor to climb into the gaps between the inner and outer formwork and use a handheld angle grinder for grinding and repair. Due to the large area of ​​the aqueduct inner formwork, grinding it entirely with an angle grinder is time-consuming and labor-intensive. Moreover, the limitations of angle grinders make it impossible to guarantee the overall grinding quality of the steel formwork. Additionally, the extremely narrow working space makes it difficult to build an operating platform, resulting in significant safety risks for grinding personnel. Therefore, the current grinding work for aqueduct inner formwork is time-consuming, labor-intensive, and unsafe. Utility Model Content

[0003] To overcome the aforementioned shortcomings of existing manual grinding of the inner mold of a U-shaped aqueduct, the technical problem to be solved by this utility model is to provide a safe, reliable, and easy-to-construct grinding device for the inner mold of a U-shaped aqueduct.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A grinding device for the inner mold of a U-shaped aqueduct includes a driving pulley and a driven pulley, and a grinding belt wound between the driving pulley and the driven pulley. The driven pulley is provided with a spiral roller coaxially fixed to it. The driving pulley is slidably mounted on a track extending along the axis of the inner mold on the top side of the inner mold via a support base, and can run along the track by a drive mechanism. The driven pulley reaches the bottom of the aqueduct through the gap between the outer wall of the inner mold after it has shrunk inward and the inner wall of the cast aqueduct, and under the action of gravity, the grinding belt is pressed against the outer wall of the inner mold. The spiral roller contacts the inner wall of the aqueduct through its external spiral blades, so that it generates an axial moving force when it rotates with the driven pulley.

[0006] Furthermore, the polishing belt includes a rubber belt and a polishing layer disposed on the outer surface of the rubber belt.

[0007] Furthermore, the inner surface of the grinding belt is provided with multiple rubber protrusions extending along its length, and the surfaces of the driving pulley and the driven pulley are provided with multiple grooves. The grinding belt achieves axial positioning with the driving pulley and the driven pulley through the cooperation of the rubber protrusions and the grooves.

[0008] Furthermore, the drive mechanism is an electric trolley that can run along a track, and the support seat of the drive pulley is mounted on the electric trolley.

[0009] Furthermore, the drive mechanism includes a rope reel coaxially fixed to the drive pulley and a fixed pulley disposed on the support base and located on the side of the rope reel. The traction rope on the rope reel passes around the fixed pulley and is connected to one end of the inner mold.

[0010] Furthermore, the spiral rollers comprise two, respectively disposed on both sides of the driven pulley.

[0011] The beneficial effects of this utility model are as follows: The grinding device, consisting of a driving pulley, a driven pulley, and a grinding belt wound between them, allows the grinding belt to be placed into the gap between the inner mold and the trough using the driven pulley. Under the gravity of the driven pulley, the grinding belt adheres tightly to the inner mold template. When the driving pulley drives the grinding belt, the grinding belt grinds the inner mold template. Simultaneously, the spiral roller, coaxially fixed to the driven pulley, generates axial movement force as it rotates with the driven pulley. This force, in conjunction with the drive mechanism of the driving pulley, enables the movement of the entire device, thus achieving the moving grinding of the entire inner mold. Compared to traditional handheld angle grinder grinding, this significantly reduces time and labor costs, greatly simplifies the operation, and makes the grinding work more efficient and faster. Attached Figure Description

[0012] Figure 1 This is the main structural view of this utility model;

[0013] Figure 2 This is a top view of the structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the connection between the drive pulley and the grinding belt of this utility model.

[0015] The diagram is labeled as follows: 1- driving pulley, 2- driven pulley, 3- grinding belt, 4- spiral roller, 5- inner mold, 6- track, 7- aqueduct, 8- rope reel, 9- fixed pulley, 11- support base, 12- groove, 31- rubber belt, 32- grinding layer, 33- rubber ridge, 41- spiral blade, 81- traction rope. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] It should be noted that if this utility model contains directional indicators such as up, down, left, right, front, and back, these terms are used to describe the relative positional relationships between components and are not specific references to the absolute positions of the components or the relationships between them. They are only used to explain the relative positional relationships and movement of the components in a specific posture. If the specific posture changes, the directional indicator will also change accordingly. If this utility model contains terms related to quantity such as "many," "multiple," or "several," these terms specifically refer to two or more.

[0018] like Figure 1 , Figure 2 As shown, the present invention provides a grinding device for the inner mold of a U-shaped aqueduct, comprising a driving pulley 1 and a driven pulley 2, and a grinding belt 3 wound between the driving pulley 1 and the driven pulley 2. The driven pulley 2 is provided with a spiral roller 4 coaxially fixed to it. The driving pulley 1 is slidably mounted on a track 6 extending along the axis of the inner mold 5 on the top side of the inner mold 5 via a support base 11, and can run along the track 6 via a drive mechanism. The driven pulley 2 reaches the bottom of the aqueduct 7 through the gap between the outer wall of the inner mold 5 after its inward contraction and the inner wall of the cast aqueduct 7, and under the action of gravity, the grinding belt 3 is pressed tightly against the outer wall of the inner mold 5. The spiral roller 4 contacts the inner wall of the aqueduct 7 through its external spiral blades 41, generating an axial moving force when it rotates with the driven pulley 2. The driving pulley 1 refers to a pulley that can be actively rotated by a motor, and the driven pulley 2 refers to a pulley that can only rotate under the drive of the grinding belt 3. The outer diameters of the driven pulley 2 and the spiral roller 4 are slightly smaller than the gap between the inner mold 5 and the inner wall of the trough 7, so that the driven pulley 2 can be lowered, while the grinding belt 3 can be as close as possible to the outer wall of the inner mold 5.

[0019] The installation and grinding process of this utility model is as follows: After pouring a section of the aqueduct using the aqueduct casting template system, during demolding, the hydraulic system causes the outer mold to expand outward and the inner mold to contract inward. Traditional manual grinding requires moving the entire template system to the next aqueduct pouring position before workers enter the space between the inner and outer molds to grind. This utility model grinds directly after the inner mold contracts. Specifically, the driving pulley 1 is first slidably mounted on the track 6 at one end of the inner mold 5 via the support base 11. Then, the driven pulley 2 is inserted into the bottom of the aqueduct 7 through the gap between the inner mold 5 and the aqueduct 7. Due to the gravity of the driven pulley 2, the grinding belt 3 is tightened, causing it to adhere tightly to the outer wall of the inner mold 5. Finally, the driving pulley 1 is activated, causing the grinding belt 3 to run and grind the outer wall of the inner mold 5. During the grinding process, the drive mechanism moves the active pulley 1 along the track 6. Simultaneously, as the spiral roller 4 rotates with the driven pulley 2, the friction between its external spiral blades 41 and the inner wall of the trough 7 generates an axial moving force on the spiral roller 4. By controlling the rotation direction and speed of the active pulley 1, the spiral roller 4 can move in the same direction as the active pulley 1, achieving synchronous movement between the active pulley 1 and the driven pulley 2, thus enabling the grinding of the inner mold 5. After grinding one side of the mold, the equipment can be moved to the other side for further grinding. Alternatively, two sets of equipment can be used to grind both sides of the inner mold 5 simultaneously.

[0020] For grinding belt 3, such as Figure 3 As shown, in order to achieve the grinding function, a wear-resistant grinding layer 32 that is well bonded to the substrate needs to be applied to the surface of the ordinary rubber belt 31. The grinding layer 32 can be a polyurethane + hard particle (silicon carbide) composite coating or a PTFE fiber reinforced coating. Both can be firmly bonded to the base belt through existing processes (such as impregnation or hot pressing) and provide stable grinding performance.

[0021] During the grinding process, the grinding belt 3 is subjected to frictional force along the axis of the inner mold 5. To prevent the grinding belt 3 from twisting or detaching from the drive pulley 1 and driven pulley 2, the grinding belt 3 can be made wider, and multiple rubber protrusions 33 extending along its length can be provided on the inner surface of the grinding belt 3. The drive pulley 1 and driven pulley 2 have multiple grooves 12 on their surfaces, and the number and shape of the rubber protrusions 33 match those of the grooves 12. The grinding belt 3 achieves axial positioning with the drive pulley 1 and driven pulley 2 through the cooperation of the rubber protrusions 33 and the grooves 12. In addition, the grinding belt 3 can be tightened by adding counterweights or directly increasing the weight of the spiral roller 4. On the one hand, this can make the grinding belt 3 fit tightly against the inner mold 5, preventing the belt from jumping or twisting; on the other hand, it can prevent the rubber protrusions 33 of the grinding belt 3 from detaching from the grooves 12 of the drive pulley 1 and driven pulley 2, thereby ensuring the stable operation of the entire equipment.

[0022] Regarding the movement of the drive pulley 1, this utility model provides two solutions. One is that the drive mechanism is an electric trolley that can run along the track 6, and the support seat 11 of the drive pulley 1 is mounted on the electric trolley. This method is relatively conventional, and many mature products in the prior art can be directly selected. Another solution is as follows... Figure 2 As shown, the driving mechanism includes a rope reel 8 coaxially fixed to the driving pulley 1 and a fixed pulley 9 disposed on the support base 11 and located on the side of the rope reel 8. The traction rope 81 on the rope reel 8 passes around the fixed pulley 9 and is connected to one end of the inner mold 5. This scheme directly utilizes the driving pulley 1 to provide the power for movement, which simplifies the equipment structure. The rope reel 8 can be equipped with a rope guide so that the arrangement angle of the traction rope 81 wound on the rope reel 8 can be matched with the helical inclination angle of the helical blades 41 of the helical roller 4 to achieve synchronous movement of the driving pulley 1 and the driven pulley 2. Furthermore, to improve the smoothness of the driven pulley 2's operation, the helical roller 4 preferably includes two rollers, respectively disposed on both sides of the driven pulley 2.

Claims

1. A grinding device for the inner mold of a U-shaped trough, characterized in that: It includes a driving pulley (1) and a driven pulley (2), and a grinding belt (3) wrapped between the driving pulley (1) and the driven pulley (2). The driven pulley (2) is provided with a spiral roller (4) coaxially fixed to it. The driving pulley (1) is slidably set on a track (6) extending along the axis of the inner mold (5) on the top side of the inner mold (5) through a support seat (11), and can run along the track (6) through a drive mechanism. The driven pulley (2) reaches the bottom of the aqueduct (7) through the gap between the outer wall of the template after the inner mold (5) is shrunk and the inner wall of the cast aqueduct (7), and the grinding belt (3) is pressed against the outer wall of the inner mold (5) under the action of gravity. The spiral roller (4) contacts the inner wall of the aqueduct (7) through its external spiral blades (41), so that it generates an axial moving force when it rotates with the driven pulley (2).

2. The grinding device for the inner mold of a U-shaped trough as described in claim 1, characterized in that: The polishing belt (3) includes a rubber belt (31) and a polishing layer (32) disposed on the outer surface of the rubber belt (31).

3. The grinding device for the inner mold of a U-shaped trough as described in claim 2, characterized in that: The inner surface of the grinding belt (3) is also provided with multiple rubber protrusions (33) extending along its length direction. The surfaces of the driving pulley (1) and the driven pulley (2) are provided with multiple grooves (12). The grinding belt (3) achieves axial positioning with the driving pulley (1) and the driven pulley (2) through the cooperation of the rubber protrusions (33) and the grooves (12).

4. The grinding device for the inner mold of a U-shaped trough as described in claim 1, characterized in that: The drive mechanism is an electric trolley that can run along the track (6), and the support seat (11) of the drive pulley (1) is mounted on the electric trolley.

5. The grinding device for the inner mold of a U-shaped trough as described in claim 1, characterized in that: The drive mechanism includes a rope disc (8) coaxially fixed to the drive pulley (1) and a fixed pulley (9) disposed on the support base (11) and located on the side of the rope disc (8). The traction rope (81) on the rope disc (8) passes around the fixed pulley (9) and is connected to one end of the inner mold (5).

6. The grinding device for the inner mold of a U-shaped trough as described in claim 1, characterized in that: The spiral rollers (4) include two, which are respectively arranged on both sides of the driven pulley (2).

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