Soft cutting device for concrete expansion joint

Abstract

The utility model discloses a concrete expansion joint soft cutting device which comprises a trunk canal left side plate and a trunk canal right side plate, transverse plates are fixedly connected above the trunk canal left side plate and the trunk canal right side plate, an upper blocking plate is fixedly welded between the two transverse plates, and a rib plate is fixedly welded in a gap area between the trunk canal left side plate and the trunk canal right side plate. The trunk canal left side plate and the trunk canal right side plate are matched with the evenly-distributed rib plates to form a complete stress whole, and the structural strength and the deformation resistance are improved; the conical embedded end and the main body are integrally formed, the production process is simplified, and stable connection of the device and a pouring base layer is ensured.

Description

A soft cutting device for concrete expansion joints Technical Field

[0001] This utility model relates to the technical field of soft cutting equipment for expansion joints, specifically a soft cutting device for concrete expansion joints. Background Technology

[0002] Soft cutting of concrete expansion joints is a process that completes the formation of expansion joints after concrete pouring and before initial hardening. This process uses a special soft cutting device to cut the joints when the concrete is in a plastic state. It can be carried out simultaneously with the slope protection pouring, without waiting for the later curing of concrete. It can efficiently release the stress generated by the thermal shrinkage and drying shrinkage of concrete, reduce the risk of irregular cracking and slab breakage from the source, and ensure the long-term stability of the slope protection structure.

[0003] Traditional cutting equipment can only be used after the concrete slope protection has been cured. The construction process is complicated and time-consuming, and it cannot be carried out simultaneously with the slope protection pouring, which seriously affects the overall construction efficiency. The structure of the motor-driven high-speed saw blade has poor stability during operation, which can easily lead to irregular cuts and difficulty in ensuring verticality, making it difficult to control the construction quality. Titanium alloy saw blades are prone to wear and damage during long-term cutting, resulting in high equipment maintenance costs and short service life. The entire equipment relies on truss installation, which is complex and heavy, making it inconvenient to move and arrange on site. It cannot be flexibly spliced ​​according to construction needs, thus limiting its application scope. Summary of the Invention

[0004] The purpose of this utility model is to provide a soft cutting device for concrete expansion joints in order to solve the problems mentioned above.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a soft cutting device for concrete expansion joints, comprising: a left side plate and a right side plate of a dry canal, with a horizontal plate fixedly connected above both the left side plate and the right side plate of the dry canal, an upper blocking plate fixedly welded between the two sets of horizontal plates, and a reinforcing plate fixedly welded to the gap area between the left side plate and the right side plate of the dry canal.

[0006] As a further embodiment of this utility model: a top cover plate is fixedly welded above the horizontal plate, and a connecting plate is fixedly connected above the top cover plate near the edge area. The surface of the connecting plate is provided with through holes, and the connecting plate extends outward from the top cover plate. A connecting screw is inserted through the overlapping area of ​​the connecting plates of the two sets of parallel hydraulic engineering slope protection soft cutting devices, and nuts are screwed to both ends of the connecting screw.

[0007] As a further improvement of this utility model, a tapered embedded end is provided below the left side plate and the right side plate of the dry canal.

[0008] As a further embodiment of this utility model: the stiffening plates are evenly spaced between the left side plate and the right side plate of the canal. The two ends of the stiffening plates are completely fitted and fixedly welded to the inner sidewalls of the left side plate and the right side plate of the canal, respectively. The upper edge of the stiffening plate is fitted to the lower surface of the horizontal plate, and the lower edge of the stiffening plate extends to the top position near the conical embedded end. The stiffening plates abut against the lower surface of the upper blocking plate and are fixedly connected.

[0009] As a further embodiment of this utility model: a reinforcing weld is provided at the welding joint between the connecting plate and the upper cover plate, the reinforcing weld is provided around the bottom edge of the connecting plate, the inner wall of the through hole opened on the surface of the connecting plate is ground, the axis of the through hole coincides with the axis of the connecting screw, a washer is provided between the nut and the connecting plate, the washer is sleeved on the connecting screw and is tightly fitted to the surface of the nut and the connecting plate respectively.

[0010] As a further embodiment of this utility model: the conical embedded end is integrally formed with the left side plate and the right side plate of the main channel. The outer wall of the conical embedded end is smooth, the tip of the conical embedded end is downward, and the side wall of the conical embedded end forms a smooth transition with the side wall of the left side plate and the right side plate of the main channel. The length of the conical embedded end is adapted to the height of the left side plate and the right side plate of the main channel, and the thickness of the conical embedded end is consistent with the thickness of the left side plate and the right side plate of the main channel.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] In this invention, the left and right sides of the main channel are combined with evenly distributed reinforcing ribs to form a complete load-bearing structure, which improves the structural strength and resistance to deformation; the conical embedded end is integrally formed with the main body, which simplifies the production process and ensures stable connection between the device and the cast-in-place base.

[0013] The device enables simultaneous pouring of channel slope protection and soft cutting of expansion joints in the Hetao Irrigation Area, improving construction efficiency and accurately forming regular expansion joints to ensure construction quality. Multiple sets of devices can be securely spliced ​​together through connecting plates, connecting bolts, and nuts to adapt to the construction needs of slope protection of different lengths. The upper blocking plate and upper cover plate can prevent the intrusion of debris and cement slurry, extending service life. All components are made of corrosion-resistant and high-strength materials, adaptable to the construction environment, and the overall design takes into account practicality and reliability, ensuring the stability of the slope protection structure of water conservancy projects. Attached Figure Description

[0014] Figure 1 is a schematic diagram of the overall structure of the soft cutting device for concrete expansion joints according to this utility model;

[0015] Figure 2 is a schematic diagram of the side structure of the soft cutting device for concrete expansion joints according to this utility model;

[0016] Figure 3 is a schematic diagram of the top surface of the soft cutting device for concrete expansion joints described in this utility model.

[0017] Figure 4 is a schematic diagram of the bottom surface of the soft cutting device for concrete expansion joints described in this utility model.

[0018] In the diagram: 1. Left side plate of the main canal; 2. Right side plate of the main canal; 3. Horizontal plate; 4. Conical embedded end; 5. Upper blocking plate; 6. Rib plate; 7. Upper cover plate; 8. Connecting plate; 9. Connecting screw; 10. Nut. Detailed Implementation

[0019] 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.

[0020] Referring to Figures 1 to 4, in this embodiment of the present invention, a concrete expansion joint soft cutting device includes: a left side plate 1 and a right side plate 2 of a main canal. The left side plate 1 and the right side plate 2 are symmetrically and parallelly arranged, and their dimensions are completely identical. Together, they constitute the main support structure of the device, providing a foundation carrier for the subsequent installation of various components. Simultaneously, as the core forming structure for expansion joint soft cutting, their spacing is adapted to the width of the pre-set expansion joint of the canal slope protection in the Hetao Irrigation District, ensuring that an expansion joint meeting construction requirements can be accurately formed. Above the left side plate 1 and the right side plate 2, a horizontal plate 3 is fixedly connected. The horizontal plate 3 is fixedly connected to the left side plate 1 and the right side plate 2 by means of welding, preferably by welding. The weld seam is full. The system is free of slag inclusions and air holes, ensuring a firm connection. The two sets of horizontal plates 3 are flush with the top edges of the left side plate 1 and the right side plate 2 of the main canal, respectively, and are distributed in parallel. An upper blocking plate 5 is fixedly welded between the two sets of horizontal plates 3. The two ends of the upper blocking plate 5 are completely fitted to the opposite inner sidewalls of the two sets of horizontal plates 3 and then welded and fixed. The width of the upper blocking plate 5 is adapted to the spacing between the two sets of horizontal plates 3, which can completely cover the gap between the two sets of horizontal plates 3 and achieve top sealing. At the same time, a stiffening plate 6 is fixedly welded in the gap area between the left side plate 1 and the right side plate 2 of the main canal. The stiffening plate 6 serves as a reinforcing structure to improve the overall structural strength of the device and prevent the left side plate 1 and the right side plate 2 of the main canal from deforming during use.

[0021] A top cover plate 7 is fixedly welded above the horizontal plate 3. The size of the top cover plate 7 is adapted to the top area formed by the two sets of horizontal plates 3 and the top blocking plate 5, completely covering the top of the device. The welding between the top cover plate 7 and the horizontal plate 3 adopts a full welding method to ensure a tight connection and prevent external debris, cement slurry, etc. from entering the device. A connecting plate 8 is fixedly connected above the top cover plate 7 near the edge. The connecting plate 8 and the top cover plate 7 can be connected by welding or bolts, preferably by welding. A reinforcing weld is provided at the weld, which surrounds the bottom edge of the connecting plate 8, which can effectively enhance the connection strength between the connecting plate 8 and the top cover plate 7 and prevent the connection from breaking under stress. The connecting plate 8 extends to the outside of the top cover plate 7, and the extension length is set according to the splicing requirements of multiple sets of equipment. A through hole is opened on the surface of the connecting plate 8. The size of the through hole is adapted to the size of the connecting screw 9, which facilitates the through insertion of the connecting screw 9. When multiple sets of the present invention are required, When the soft cutting equipment for slope protection in water conservancy projects works in parallel and in synergy, the connecting plates 8 of two adjacent sets of equipment are overlapped so that the through holes on the surfaces of the two sets of connecting plates 8 are aligned and the axis of the through holes coincides with the axis of the connecting screw 9. The connecting screw 9 is inserted through and into the overlapping area of ​​the two sets of connecting plates 8. Nuts 10 are screwed to both ends of the connecting screw 9. By tightening the nuts 10, the two sets of equipment are stably spliced. To ensure the tightness of the splice, a washer is placed between the nut 10 and the connecting plate 8. The washer is sleeved on the connecting screw 9 and is in close contact with the surfaces of the nut 10 and the connecting plate 8. The washer is made of elastic material, which can increase the contact area and play a buffering role to prevent the nut 10 from loosening during use. At the same time, the inner wall of the through hole on the surface of the connecting plate 8 is polished. After polishing, the inner wall of the through hole is smooth and burr-free, which can reduce the wear of the connecting screw 9 and extend the service life of the connecting screw 9 and the nut 10.

[0022] Below the left side plate 1 and the right side plate 2 of the main canal, a conical embedding end 4 is provided. The conical embedding end 4 is integrally formed with the left side plate 1 and the right side plate 2 of the main canal. This integral forming structure ensures the connection strength between the three and avoids problems such as loosening or breakage. At the same time, it simplifies the production process and reduces manufacturing costs. The outer wall of the conical embedding end 4 is smooth, and its tip points downward, which facilitates the embedding of the device into the cast-in-place base layer of the canal slope protection in the Hetao Irrigation Area, reducing the resistance during embedding and minimizing disturbance to the cast-in-place base layer. The side wall of the conical embedding end 4 is integrated with the main canal... A smooth transition is formed between the side walls of the left side plate 1 and the right side plate 2 of the main canal, with no sharp edges or protrusions at the transition point. This ensures a smooth connection between the device and the poured base layer after embedding, without affecting the flatness of the subsequent slope protection pouring. The length of the conical embedding end 4 is matched with the height of the left side plate 1 and the right side plate 2 of the main canal, and its thickness is consistent with the thickness of the left side plate 1 and the right side plate 2 of the main canal. This ensures that the device is subjected to uniform stress and avoids excessive local stress that could lead to structural deformation. At the same time, it ensures that the conical embedding end 4 can provide sufficient embedding depth to ensure the stability of the device during the pouring process.

[0023] The stiffening plates 6 are evenly distributed between the left side plate 1 and the right side plate 2 of the main canal. The spacing is reasonably set according to the overall size of the device and the stress requirements to ensure that the external forces borne by the left side plate 1 and the right side plate 2 of the main canal can be evenly distributed. The two ends of the stiffening plates 6 are completely attached to the inner sidewalls of the left side plate 1 and the right side plate 2 of the main canal and then fixedly welded. Double-sided welding is used at the welding points to ensure a firm connection and no risk of loosening. The upper edge of the stiffening plates 6 is attached to the lower surface of the horizontal plate 3, and the attachment point is fixed by welding to further enhance the connection strength. The lower edge of the stiffening plate 6 extends to the top position near the conical embedded end 4, allowing the stiffening plate 6 to penetrate most of the area between the left side plate 1 and the right side plate 2 of the main channel, maximizing its reinforcing effect. At the same time, the stiffening plate 6 abuts against and is fixedly connected to the lower surface of the upper blocking plate 5, preferably by welding, so that the stiffening plate 6, the upper blocking plate 5, the horizontal plate 3, and the left side plate 1 and the right side plate 2 of the main channel form a complete load-bearing unit, further improving the overall structural stability and deformation resistance of the device, and ensuring the structural integrity of the device during long-term use.

[0024] The working principle of this utility model is as follows:

[0025] During construction, the device is first embedded into the pre-set position of the pouring base layer of the canal slope protection in the Hetao Irrigation District through the conical embedding end 4 located below the left side plate 1 and the right side plate 2 of the main canal. This achieves stable positioning of the device within the pouring base layer. The conical embedding end 4 is integrally formed with the left side plate 1 and the right side plate 2 of the main canal, with its tip pointing downwards. Its smooth outer wall and the smooth transition between it and the side walls of the left side plate 1 and the right side plate 2 of the main canal reduce disturbance to the pouring base layer during embedding. At the same time, the conical structure enhances the stability of the device within the pouring base layer, preventing displacement of the device due to concrete impact and vibration during slope protection pouring. Furthermore, the thickness of the conical embedding end 4 is consistent with the thickness of the left side plate 1 and the right side plate 2 of the main canal, ensuring that the device remains firmly in place after embedding. The smooth connection of the base layer does not affect the flatness of the subsequent slope protection pouring. The left side plate 1 and the right side plate 2 of the main canal serve as the main support structure of the device, forming the basic frame of the expansion joint soft shear. Their spacing is adapted to the width of the preset expansion joint. During the slope protection concrete pouring, the left side plate 1 and the right side plate 2 of the main canal can be directly used as the forming template of the expansion joint to separate the pouring area. After the concrete solidifies, the device can be removed to form a regular expansion joint. The horizontal plates 3 fixedly connected to the top of the left side plate 1 and the right side plate 2 of the main canal not only enhance the top structural strength of the left side plate 1 and the right side plate 2 of the main canal and prevent them from deforming due to the lateral pressure of the concrete during the pouring process, but also provide a stable installation foundation for the upper blocking plate 5 and the upper cover plate 7. The two sets of horizontal plates 3 are fixedly welded together. The upper blocking plate 5 can seal the top area between the left side plate 1 and the right side plate 2 of the main canal, preventing concrete slurry from entering the device and blocking the expansion joint forming space during the pouring process. Simultaneously, the upper blocking plate 5 and the reinforcing plate 6 abut against each other and are fixedly connected, further improving the overall structural stability of the device and ensuring that the device does not deform or shift during pouring and vibration, thus guaranteeing the forming accuracy of the expansion joint. The reinforcing plates 6, fixedly welded to the gap area between the left side plate 1 and the right side plate 2 of the main canal, are evenly spaced. Their two ends are completely fitted and fixedly welded to the inner walls of the left side plate 1 and the right side plate 2 of the main canal, respectively. The upper edge of the reinforcing plate 6 is fitted to the lower surface of the horizontal plate 3, and the lower edge extends to near the top of the conical embedded end 4. This arrangement can... The expansion joint effectively disperses the lateral concrete pressure borne by the left side plate 1 and right side plate 2 of the main canal, avoiding excessive local stress that could lead to structural deformation. This ensures that the width and verticality of the expansion joint meet the construction requirements of the Hetao Irrigation District water conservancy project, guaranteeing the structural integrity of the device during long-term construction and application. The top cover plate 7, fixedly welded above the horizontal plate 3, protects the top of the device from cement slurry, debris, and other contaminants that could erode the internal structure during pouring, extending the device's service life. The connecting plate 8, fixedly connected near the edge of the top cover plate 7, extends outward. When multiple expansion joints need to be continuously installed on the slope protection of the Hetao Irrigation District canal, multiple sets of soft-cutting equipment for this water conservancy project can be arranged in parallel, with the connecting plates 8 of adjacent sets overlapping to align the through holes on the surface of the connecting plates 8.Furthermore, the axis of the through hole coincides with the axis of the connecting screw 9. The connecting screw 9 is inserted through and into the overlapping area of ​​the two sets of connecting plates 8. Nuts 10 are then screwed onto both ends of the connecting screw 9. Tightening the nuts 10 achieves a stable connection between multiple sets of equipment, ensuring that the spacing between the multiple sets of equipment is uniform and the arrangement is neat, thus forming a continuous and regular expansion joint. The reinforcing weld around the bottom edge of the connecting plate 8 at the welding point between the connecting plate 8 and the upper cover plate 7 can enhance the connection strength between the connecting plate 8 and the upper cover plate 7, preventing the connection part from breaking due to the stress of the equipment assembly. The inner wall of the through hole of the connecting plate 8 is drilled. The grinding process reduces wear on the connecting screw 9, while the washer fitted between the nut 10 and the connecting plate 8 on the connecting screw 9 increases the contact area between the nut 10 and the connecting plate 8, improving the tightness of the connection and preventing the nut 10 from loosening due to vibration during construction. This ensures the overall stability of multiple sets of equipment working together, guaranteeing efficient and precise soft cutting of expansion joints during the pouring of canal slope protection in the Hetao Irrigation Area water conservancy project, forming expansion joints that meet design requirements and resisting cracking of the canal slope due to temperature changes, settlement, and other factors.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A soft cutting device for concrete expansion joints, characterized in that, include: The left side plate (1) and the right side plate (2) of the main canal are fixedly connected with horizontal plates (3) on the top of the left side plate (1) and the right side plate (2). An upper blocking plate (5) is fixedly welded between the two sets of horizontal plates (3). A stiffening plate (6) is fixedly welded in the gap area between the left side plate (1) and the right side plate (2).

2. The concrete expansion joint soft cutting device according to claim 1, characterized in that, A top cover plate (7) is fixedly welded above the horizontal plate (3). A connecting plate (8) is fixedly connected above the top cover plate (7) near the edge area. A through hole is opened on the surface of the connecting plate (8). The connecting plate (8) extends outward from the top cover plate (7). A connecting screw (9) is inserted through the overlapping area of ​​the connecting plates (8) of the two sets of parallel hydraulic engineering slope protection soft cutting equipment. Nuts (10) are screwed to both ends of the connecting screw (9).

3. The soft cutting device for concrete expansion joints according to claim 1, characterized in that, A tapered embedded end (4) is provided below the left side plate (1) and the right side plate (2) of the main canal.

4. The soft cutting device for concrete expansion joints according to claim 3, characterized in that, The stiffening plates (6) are evenly spaced between the left side plate (1) and the right side plate (2) of the main channel. The two ends of the stiffening plates (6) are completely fitted and fixedly welded to the inner side wall of the left side plate (1) and the inner side wall of the right side plate (2) of the main channel, respectively. The upper edge of the stiffening plates (6) is fitted to the lower surface of the horizontal plate (3). The lower edge of the stiffening plates (6) extends to the top position near the conical embedded end (4). The stiffening plates (6) and the lower surface of the upper blocking plate (5) abut against each other and are fixedly connected.

5. A soft-cutting device for concrete expansion joints according to claim 2, characterized in that, The connecting plate (8) and the upper cover plate (7) are provided with a reinforcing weld. The reinforcing weld is provided around the bottom edge of the connecting plate (8). The inner wall of the through hole opened on the surface of the connecting plate (8) is ground. The axis of the through hole coincides with the axis of the connecting screw (9). A washer is provided between the nut (10) and the connecting plate (8). The washer is sleeved on the connecting screw (9) and is tightly fitted to the surfaces of the nut (10) and the connecting plate (8).

6. A soft cutting device for concrete expansion joints according to claim 3, characterized in that, The conical embedded end (4) is integrally formed with the left side plate (1) and the right side plate (2) of the main channel. The outer side wall of the conical embedded end (4) is smooth, and the tip of the conical embedded end (4) is set downward. The side wall of the conical embedded end (4) forms a smooth transition with the side wall of the left side plate (1) and the right side plate (2) of the main channel. The length of the conical embedded end (4) is matched with the height of the left side plate (1) and the right side plate (2) of the main channel. The thickness of the conical embedded end (4) is consistent with the thickness of the left side plate (1) and the right side plate (2) of the main channel.

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