Flexible scraper blade for primary support sprayed concrete

Abstract

The utility model relates to the technical field of engineering, in particular to a flexible scraper for primary support sprayed concrete, which comprises a scraper body used for scraping the primary support sprayed concrete. The three-degree-of-freedom motor is connected to the scraper body; the end part of the operating rod is provided with the three-degree-of-freedom motor; and the control panel is electrically connected to the three-degree-of-freedom motor. According to the flexible scraping plate for the primary support sprayed concrete, the three-degree-of-freedom motor is arranged to drive the scraping plate body to have good rotating capacity in the X-axis direction, the Y-axis direction and the Z-axis direction, normal work of the scraping plate body under the working conditions of various angles is facilitated, the scraping plate body is not limited by space conditions, and the working efficiency is improved. Primary support sprayed concrete is scraped through the scraper body, the appearance quality of the primary support can be improved, meanwhile, the primary support is scraped before curing, the cost problem and the safety risk problem caused by primary support overrun are effectively avoided, and the flexible scraper is simple in structure, convenient to use and good in effect.

Description

Technical Field

[0001] This utility model relates to the field of engineering technology, and in particular to a flexible scraper for initial support shotcrete. Background Technology

[0002] In engineering, initial support (referred to as initial support) is frequently constructed. For example, in arch bridge abutments with monopile embedded foundations or suspension bridge main cable tunnel anchorage structures, excavation must be completed before reinforced concrete construction. Initial support construction is required after each stage of excavation. The initial support includes anchor bolts, steel frames, and shotcrete. Among these, the shotcrete is the structure in direct contact with the subsequent reinforced concrete; therefore, the quality of the initial shotcrete directly affects the quality of the subsequent reinforced concrete, especially the issue of insufficient clearance due to excessive initial support.

[0003] To address the issue of potential over-limit conditions in the initial support, one technical approach is to identify the over-limit areas using 3D scanning after the shotcrete construction and before the reinforced concrete construction, and then manually address them. Another technical approach is to increase the allowance for deformation.

[0004] The above method has the following problems: (1) The additional secondary manual treatment after the initial support is cured and the increased concrete consumption due to the increased reserved deformation amount lead to the increase in construction costs and result in large cost investment; (2) The secondary manual treatment involves the cutting of steel frame, which reduces the bearing capacity of the initial support and increases the safety risk in the later reinforced concrete construction process. Utility Model Content

[0005] The purpose of this utility model is to address the problems in existing technologies where the initial support may exceed the limits, such as additional secondary manual processing after the initial support has solidified, increased concrete consumption due to increased allowable deformation leading to higher construction costs, and large investment costs. The secondary manual processing involves cutting the steel frame, which reduces the load-bearing capacity of the initial support and increases the safety risks in the subsequent reinforced concrete construction process. The present invention provides a flexible scraper for shotcreting initial supports.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A flexible scraper for initial shotcrete application includes:

[0008] The scraper body is used for scraping and applying initial shotcrete.

[0009] A three-degree-of-freedom motor is connected to the scraper body;

[0010] The control lever has the three-degree-of-freedom motor installed at its end;

[0011] The control panel is electrically connected to the three-degree-of-freedom motor.

[0012] The flexible scraper for initial shotcrete application described in this invention, driven by a three-degree-of-freedom motor, has good rotational capability in the X, Y, and Z axes. This allows the scraper to operate normally under various angular conditions without being constrained by spatial limitations. By scraping the initial shotcrete with the scraper, the appearance quality can be improved. Furthermore, scraping before the initial support cures effectively avoids cost and safety risks caused by exceeding the initial support limits. This flexible scraper has a simple structure, is easy to use, and has good performance.

[0013] As a preferred technical solution of this utility model, the length of the scraper body is greater than the spacing of the initial support arch.

[0014] As a preferred technical solution of this utility model, the scraper body includes a rubber sheet and a steel plate, and the rubber sheet and the steel plate are laminated and bonded together.

[0015] As a preferred technical solution of this utility model, one end of the scraper body is provided with a cutting edge.

[0016] As a further preferred technical solution of this utility model, the angle of the cutting edge is 45° to 70°.

[0017] As a preferred technical solution of this utility model, the three-degree-of-freedom motor is a three-degree-of-freedom spherical servo motor.

[0018] As a preferred technical solution of this utility model, the output end of the three-degree-of-freedom motor is connected to the scraper body through a connecting plate.

[0019] As a further preferred technical solution of this utility model, a plurality of springs are evenly arranged on the connecting plate, and the springs are connected to the scraper body.

[0020] By adopting this structural design, and by incorporating the cutting edge and the spring, wear on the scraper body during operation can be effectively reduced, over-scraping can be minimized, and safety can be improved.

[0021] As a preferred technical solution of this utility model, the control panel is detachably connected to the operating lever.

[0022] As a preferred technical solution of this utility model, the control panel is provided with a power switch, an X-axis forward / reverse toggle switch, a Y-axis forward / reverse toggle switch and a Z-axis forward / reverse toggle switch.

[0023] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0024] 1. The flexible scraper for initial shotcrete support described in this utility model, by setting the scraper body to be driven by the three-degree-of-freedom motor, has good rotational capability in the X, Y, and Z axes, which is beneficial for the scraper body to work normally under various angle conditions and is not constrained by spatial conditions. By scraping the initial shotcrete support with the scraper body, its appearance quality can be improved. At the same time, scraping it before the initial support cures can effectively avoid cost problems and safety risks caused by the initial support exceeding the limit. The flexible scraper has a simple structure, is easy to use, and has good effect.

[0025] 2. The preferred embodiment of this utility model is a flexible scraper for initial shotcrete application. By setting the cutting edge and the spring, it can effectively reduce the wear on the scraper body during operation, reduce the occurrence of over-scraping, and provide better safety. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the flexible scraper;

[0027] Figure 2 This is a partial schematic diagram of the planar arrangement of the flexible scraper.

[0028] Figure 3 This is a schematic diagram of the scraper body.

[0029] Figure 4 This is a schematic diagram of the structure of a compression spring;

[0030] Figure 5 This is a schematic diagram of the extension of the operating lever;

[0031] Figure 6 This is a diagram of the control panel.

[0032] Marked in the image:

[0033] 1-Scraper body, 11-Rubber sheet, 12-Steel plate;

[0034] 2- Bolt, 21- Nut;

[0035] 3-Spring, 31-Spring fixing device;

[0036] 4-Connecting plate;

[0037] 5-Three-degree-of-freedom motor;

[0038] 6-Operating lever, 61-Steel pipe connecting plate;

[0039] 7-Control panel, 71-Power switch, 72-X-axis forward / reverse switch, 73-Y-axis forward / reverse switch, 74-Z-axis forward / reverse switch;

[0040] 8-Wire;

[0041] 9. Power supply. Detailed Implementation

[0042] The present invention will be further described in detail below with reference to experimental examples and specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments. All technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0043] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0044] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0045] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0046] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0047] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0048] In related technologies, existing methods for handling the potential over-limitation of initial supports involve additional secondary manual processing after the initial support has cured, as well as increased concrete consumption due to increased allowable deformation, leading to higher construction costs and significant investment. The secondary manual processing involves cutting the steel frame, reducing the load-bearing capacity of the initial support and increasing safety risks during subsequent reinforced concrete construction. Therefore, the technical solution of this application was developed, which is described below in conjunction with… Figures 1 to 6 To elaborate.

[0049] Example 1

[0050] like Figures 1 to 6 As shown, the flexible scraper for initial support shotcrete of this utility model includes a scraper body 1, a spring 3, a connecting plate 4, a three-degree-of-freedom motor 5, an operating rod 6, a control panel 7, and a power supply 9.

[0051] like Figure 1 and Figure 2 As shown, the scraper body 1 is used for scraping the initial support shotcrete. The length of the scraper body 1 is greater than the spacing of the initial support arch, and the width of the scraper body 1 is not less than 20cm. The end of the operating rod 6 is equipped with the three-degree-of-freedom motor 5, which can be connected by welding. The output end of the three-degree-of-freedom motor 5 is connected to the scraper body 1 through the connecting plate 4. Several springs 3 are evenly arranged on the connecting plate 4. The springs 3 are connected to the scraper body 1. The control panel 7 is connected to the three-degree-of-freedom motor 5 and the power supply 9 through the wire 8.

[0052] In one alternative implementation, such as Figure 3 As shown, the scraper body 1 includes a high-strength wear-resistant rubber sheet 11 and a steel plate 12. The rubber sheet 11 and the steel plate 12 are stacked. The rubber sheet 11 is bonded to the steel plate 12 with rubber-specific adhesive. The thickness of the rubber sheet 11 is not less than 3mm. The steel plate 12 can be supported by Q235 material with a thickness of not less than 10mm.

[0053] In one alternative implementation, such as Figure 3As shown, one end of the scraper body 1 is provided with a cutting edge, the angle of which is 45° to 70°. The cutting edge is designed so that the length of the rubber sheet 11 is not less than the length of the steel plate 12. During operation, the cutting edge should face the initial support surface. The scraper body 1 should be replaced in time after it has been worn to a certain extent to avoid a decrease in working performance.

[0054] In one alternative implementation, such as Figure 1 and Figure 2 As shown, the three-degree-of-freedom motor 5 is a three-degree-of-freedom spherical servo motor. The Z-axis can rotate freely within a range of 360°, the X-axis can swing within a range of ±45°, and the Y-axis can swing within a range of ±45°. The three-degree-of-freedom spherical servo motor can use AC or DC. The three-degree-of-freedom spherical servo motor can bear the weight of the scraper body 1, the spring 3, the connecting plate 4, and the normal working load of the scraper body 1.

[0055] In one alternative implementation, such as Figure 1 and Figure 2 As shown, the connecting plate 4 includes a cross frame and a support frame. The cross frame is arranged parallel to the scraper body 1. The cross frame is connected to the support frame. The support frame is connected to the output end of the three-degree-of-freedom motor 5. The support frame includes a straight brace and a diagonal brace. The two diagonal braces are symmetrically arranged about the straight brace. In this embodiment, three springs 3 are evenly arranged on the cross frame.

[0056] In one alternative implementation, such as Figure 1 , Figure 2 and Figure 4 As shown, spring fixing devices 31 are welded to both ends of the spring 3. One end of the spring fixing device 31 is fastened to the cross frame by bolts 2 and nuts 21, and the other end of the spring fixing device 31 is fastened to the scraper body 1 by bolts 2 and nuts 21. That is, the spring fixing device 31 provides bolt mounting holes so that the spring 3 can be fixed to the scraper body 1 and the connecting plate 4 by bolts 2 and nuts 21. The spring 3 can be made of carbon spring steel wire, piano wire, or stainless steel spring steel wire, and the structural dimensions are not less than Ф12mm×70mm×200mm (Ф wire diameter×outer diameter×height). The bolts 2 are M20 bolts of grade not less than 8.8.

[0057] In an optional embodiment, the operating lever 6 can be made of stainless steel tubing, the stainless steel tubing having dimensions not less than Ф48mm × 3mm; for example Figure 5As shown, by pressing both ends of the stainless steel pipe into a flat shape and opening two bolt holes at each end, the operating rod 6 can be extended by using the steel pipe connecting plate 61 in conjunction with the bolt 2 and the nut 21 to adapt to various working space environments. The steel pipe connecting plate 61 is made of Q235 steel plate. The operating rod 6 can be a direct stainless steel pipe, operated manually by a flexible scraper, or it can be connected to the end of a large shotcrete machine, with the operator operating the shotcrete machine to indirectly operate the flexible scraper.

[0058] In an alternative embodiment, the wire 8 can be secured to the operating lever 6 by cable ties, and the control panel 7 can be detachably connected to the operating lever 6, for example, by being secured to the operating lever 6 by back-attached Velcro.

[0059] In one alternative implementation, such as Figure 6 As shown, the control panel 7 is equipped with a power switch 71, an X-axis forward / reverse toggle switch 72, a Y-axis forward / reverse toggle switch 73, and a Z-axis forward / reverse toggle switch 74. The forward / reverse toggle switch stops when the switch is in the center, rotates clockwise when the switch is up, and rotates counterclockwise when the switch is down.

[0060] The flexible scraper for initial shotcrete application described in this embodiment, through the three-degree-of-freedom motor 5 driving the scraper body 1, has good rotational capability in the X, Y, and Z axes. This facilitates normal operation of the scraper body 1 under various angular conditions, without being constrained by spatial limitations. By scraping the initial shotcrete with the scraper body 1, the appearance quality can be improved. Furthermore, scraping before the initial support cures effectively avoids cost and safety risks caused by exceeding the initial support limits. The blade and spring 3 effectively reduce wear on the scraper body 1 during operation, minimizing over-scraping and improving safety. This flexible scraper has a simple structure, is easy to use, and performs well.

[0061] The above description is only a preferred embodiment of the present utility model and is 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 flexible blade for primary shotcrete, characterized in that, The utility model relates to a three-dimensional spraying concrete scraping device, including: The scraping body (1) is used for scraping of primary support spraying concrete; Three degrees of freedom motor (5) is connected to the scraping body (1); The operating rod (6) is provided with the three degrees of freedom motor (5) at the end; The control panel (7) is electrically connected to the three degrees of freedom motor (5).

2. The flexible blade for primary shotcrete according to claim 1, characterized in that, The length of the scraping body (1) is greater than the distance between primary support arch frames.

3. The flexible blade for primary shotcrete according to claim 1, characterized in that, The scraping body (1) includes rubber sheet (11) and steel plate (12), and the rubber sheet (11) and the steel plate (12) are laminated and bonded.

4. The flexible blade for primary shotcrete according to claim 1, characterized in that, One end of the scraping body (1) is provided with a blade edge.

5. The flexible blade for primary shotcrete according to claim 4, characterized in that, The angle of the blade edge is 45-70 DEG.

6. The flexible blade for primary shotcrete according to claim 1, characterized in that, The three degrees of freedom motor (5) is a three degrees of freedom spherical servo motor.

7. The flexible blade for primary shotcrete according to claim 1, characterized in that, The output end of the three degrees of freedom motor (5) is connected to the scraping body (1) through the connecting plate (4).

8. The flexible blade for primary shotcrete according to claim 7, characterized in that, The connecting plate (4) is uniformly provided with a plurality of springs (3), and the springs (3) are connected to the scraping body (1).

9. The flexible blade for primary shotcrete according to claim 1, wherein The control panel (7) is detachably connected to the operating rod (6).

10. A flexible blade for primary shotcrete according to any one of claims 1 to 9, characterized in that The control panel (7) is provided with a power switch (71), an X-axis positive and negative toggle switch (72), a Y-axis positive and negative toggle switch (73) and a Z-axis positive and negative toggle switch (74).

Images