Concrete strength detection device

Abstract

The invention belongs to the technical field of concrete strength detection, and particularly relates to a concrete strength detection device which comprises a main frame fixed to the surface of a to-be-detected stand column, a guide assembly matched with the surface of the to-be-detected stand column to form an equal-width guide path is arranged on the main frame, and the guide assembly comprises two opposite sliding frames arranged on the main frame. A plurality of sliding rods are installed on the sliding frame in a sliding mode, elastic pieces are arranged on the sliding paths of the sliding rods, the elastic pieces are installed on the main frame body, lug plates are arranged on the sliding rods, the bottoms of the sliding rods are attached to the column bodies, and equal-width guiding paths are formed by the lug plates and the surfaces of the column bodies. The main frame body is provided with a positioning assembly used for locking the sliding rod. The device can be suitable for concrete strength detection of a rectangular column body and can also be used for concrete strength detection of a cylindrical stand column, the rebound apparatus can be always kept vertically facing a to-be-detected point position in the detection process, and the detection efficiency and quality are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete strength detection, and in particular to a concrete strength detection device. Background Art

[0002] Concrete strength testing runs through the entire life cycle of the project and is the core means to ensure structural safety, durability and compliance. Commonly used methods include the rebound method and the core drilling method. Among them, the rebound method uses a rebound hammer to hit the concrete surface, calculates the surface hardness based on the rebound value, and converts the strength based on the carbonization depth. The operation is simple, fast, non-destructive, and low-cost, and is suitable for large-scale surveys. The measuring points of the rebound hammer are arranged according to the "measuring area". Each measuring area is usually a square of 20cm×20cm and is relatively evenly distributed on the measured component. The measuring area is required to be clean and flat, without honeycomb surface, floating slurry and oil stains, etc. If necessary, a grinder should be used to remove loose objects and debris on the surface. When rebounding, the axis of the rebound hammer should be perpendicular to the concrete test surface, avoiding stones or pores. In order to improve efficiency, a bracket is also set up, on which components such as motors and cylinders are installed to drive the rebound tester to move to the corresponding measuring points in sequence, and then the measuring points are automatically measured, and the measured values ​​of the rebound tester are observed through a camera or other visual equipment; For example, CN202311133231.5 is a concrete strength detection device for building construction, which can automatically clamp at both ends of the component when it abuts against the building component, and drive the detection mechanism to perform mirror detection at both ends of the component through the adjustment component, which not only saves the tedious steps of manual detection, but also ensures the detection accuracy of the component mirror point, greatly improving the convenience of detection; However, in existing prefabricated buildings, in addition to square and flat beams and columns and prefabricated concrete slabs, there are also cylindrical bridge piers. For a cylindrical pier with a relatively large diameter, the 20×20cm test area can be basically regarded as a plane, and the strength test can also be carried out by the rebound method. However, when using the detection device shown in CN202311133231.5 for strength testing, since the rebound hammer on the detection device can only move on the X-axis and Y-axis when adjusting the position, the movement trajectory forms a rectangular grid. As a result, when the rebound hammer moves to different positions, it cannot remain perpendicular to the pier surface, resulting in a large error. Therefore, it is urgent to design a strength detection device suitable for large-diameter cylindrical surfaces, so as to improve the strength detection efficiency of prefabricated columns with large-diameter arc surfaces. Summary of the invention

[0003] The present invention provides a concrete strength detection device, aiming to provide a device that can be used for concrete strength detection of rectangular cylinders and for concrete strength detection of the surface of large-diameter cylindrical cylinders, thereby improving the strength detection efficiency of prefabricated cylinders on the surface of large-diameter cylindrical cylinders.

[0004] The present invention provides the following technical solutions: A concrete strength detection device, comprising a main frame fixed to the surface of a column to be tested, the main frame being provided with a guide assembly that cooperates with the surface of the column to be tested to form an equal-width guide path, the guide assembly comprising a slide arranged at two opposite sides of the main frame, a plurality of slide bars slidably mounted on the slide, the slide bars being provided with elastic members in the direction of the sliding path, the elastic members being mounted on the main frame, the slide bars being provided with ear plates, the bottom of the slide bars being in contact with the column, the ear plates forming an equal-width guide path with the surface of the column, and the main frame being provided with a positioning assembly for locking the slide bars; A mobile platform is installed between the guide assemblies, and the mobile platform reciprocates along the guide assemblies. Guide wheel assemblies are symmetrically installed at both ends of the mobile platform. The guide wheel assemblies have at least three rolling support points on the guide assemblies, and the rolling support points are symmetrical about the central axis in the direction perpendicular to the surface of the cylinder, and the mobile platform is arranged parallel to the central axis; A moving seat is arranged on the moving platform; the moving seat reciprocates along the length direction of the moving platform, a slide table perpendicular to the surface of the column is slidably mounted on the moving seat, the slide table can reciprocate in a direction perpendicular to the surface of the column, and a rebound tester is mounted on the slide table.

[0005] By cooperating with the guide assembly and the surface of the column, a guide path of equal width can be formed. By cooperating with the guide wheel assembly and the guide path, the position of the mobile platform can be conveniently adjusted while keeping the mobile platform always perpendicular to the surface to be tested. By adjusting the position of the mobile platform, the mobile platform can be adjusted to move to different columns. By adjusting the position of the mobile seat, the position of the mobile seat at different points to be tested in the same column can be adjusted. By driving the reciprocating movement of the slide, the rebound tester detection and resetting action can be completed. Repeating the above actions can conveniently complete the concrete strength test of the test area.

[0006] By setting a sliding rod with the same sliding direction, the height of the sliding rod can be adaptively adjusted when it contacts the surface of the column, so that the ear plate on the sliding rod and the surface of the column form an equal-width guide path. By setting an elastic member, a downward force along the sliding rod can be provided so that the lower part of the sliding rod can always contact the surface of the column. By setting a positioning component, the sliding rod can be locked after the equal-width guide path is formed to maintain the stability of the equal-width guide path.

[0007] In a possible implementation, a plurality of legs are disposed outside the main frame, the legs include a fixed end and a movable end capable of adjusting an angle, and an adsorption mechanism is installed on the movable end.

[0008] By setting the fixed end and the movable end, the direction of the adsorption mechanism can be adjusted so that when the main frame is fixed, the adsorption component always faces the column, thereby improving the stability of the main frame when it is fixed on the column.

[0009] In a possible implementation manner, a limit rod is installed between the guide assemblies, and the limit rod is used to limit the displacement of the mobile platform toward one of the guide assemblies.

[0010] In a possible embodiment, the positioning assembly includes a positioning plate installed on the main frame, the spacing between the positioning plate and the main frame can be adjusted, a positioning column is arranged on the positioning plate, the positioning column passes through the main frame and the slide and is arranged toward the slide rod, and the positioning column is locked when in contact with the slide rod, and the slide rod can slide back and forth when the positioning column is not in contact with the slide rod.

[0011] By adjusting the distance between the positioning plate and the main frame, the positioning column can be moved closer to or away from the sliding rod. When the positioning column presses the sliding rod, all the sliding rods are locked. When the positioning column does not contact the sliding rod, the sliding rod can slide freely to complete adaptive height adjustment.

[0012] In a possible embodiment, the guide wheel assembly includes a wheel frame, on which is mounted a lower roller assembly for fitting the surface of a column, and an upper roller assembly for fitting the upper side of the guide assembly. The spacing between the lower roller assembly and the upper roller assembly can be adjusted to adapt to the guide path width of the guide assembly, and the lower roller assembly has at least two rolling support points with the surface of the column.

[0013] The lower roller assembly is used to press the surface of the column, so that the slide bar contacts the surface of the column and adaptively adjusts the height at the same time, so that the ear plate forms a continuous arc guide rail. The upper roller assembly is used to press the arc guide rail, so that the lower roller assembly is always pressed on the surface of the column, and the contact points of the lower roller assembly and the surface of the column are symmetrical to each other, and the contact points of the upper roller assembly and the ear plate are symmetrical to each other. When the guide wheel assembly moves in the guide assembly, it will not deflect, so the moving platform can always be kept perpendicular to the surface to be measured.

[0014] In a possible embodiment, the lower roller assembly includes a lower roller driven to rotate by a motor, and the lower rollers are symmetrically arranged on both sides of the mobile platform in the width direction. When the lower rollers are pressed on the surface of the column, the mobile platform is perpendicular to the surface of the column, and a cleaning roller is installed on the wheel axle of the lower roller.

[0015] By arranging the cleaning roller, when the mobile platform moves, it can drive the cleaning roller to clean the surface of the column, thereby preventing the dirt on the surface to be tested from affecting the concrete strength test.

[0016] In a possible embodiment, the upper roller assembly has two rolling support points on the guide assembly, including a first rocker arm and a second rocker arm that rotate synchronously in opposite directions, upper rollers are installed at the ends of the first rocker arm and the second rocker arm, and a locking assembly is provided on one side of the upper roller assembly to lock the first rocker arm and the second rocker arm in position.

[0017] By arranging the first swing rod and the second swing rod which rotate synchronously in opposite directions, the contact center axis of the upper roller assembly and the ear plate is symmetrical, and the distance between the upper roller and the lower roller can be adjusted to adapt to guide paths of different widths.

[0018] In a possible embodiment, the locking assembly includes a locking wheel installed on a first rocker arm, the locking wheel and the first rocker arm share a common rotating axis, a locking rod is provided on one side of the locking wheel, the lower end of the locking rod is rotatably connected to the wheel frame, the locking rod moves closer to or away from the locking wheel when rotating, locking teeth are provided on the locking rod, and a positioning rod is provided on one side of the locking rod, and when the positioning rod supports the locking rod, the locking rod can be prevented from separating from the locking wheel.

[0019] The locking assembly can be used to lock the first swing arm and the second swing arm to maintain the stability of the mobile platform when it moves in the first direction. By unlocking the locking assembly, the first swing arm and the second swing arm can be adjusted to adapt to guide paths of different widths.

[0020] In a possible implementation, the upper roller assembly has a rolling support point on the guide assembly, the upper roller assembly includes a support rod with adjustable vertical height, the support rod coincides with the symmetry center axis of the lower roller assembly, and the upper roller is installed on the top of the support rod.

[0021] By setting a height-adjustable support rod, the distance between the upper roller and the lower roller can be adjusted to adapt to guide paths of different widths. By setting the support rod on the symmetry axis of the lower roller assembly, the contact point between the upper roller and the ear plate and the contact point between the lower roller and the surface of the column can be symmetrical in the middle axis, thereby keeping the mobile platform always perpendicular to the surface to be measured.

[0022] In a possible implementation manner, the axle of the lower roller assembly is arranged along the length direction of the mobile platform.

[0023] The cleaning roller can be always parallel to the surface to be measured, and the cleaning roller is always in contact with the surface to be measured. When the cleaning roller is driven to rotate, the surface to be measured can be cleaned.

[0024] It is to be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the invention.

[0025] In the present invention, by setting a sliding rod with a consistent sliding direction, the height of the sliding rod can be adaptively adjusted when it contacts the surface of the column, so that the ear plate on the sliding rod and the surface of the column form an equal-width guide path, and by setting an elastic member, a downward force along the sliding rod can be provided, so that the lower part of the sliding rod can always be in contact with the surface of the column, and by setting a positioning component, the sliding rod can be locked after the equal-width guide path is formed to maintain the stability of the equal-width guide path. The mobile platform can always be perpendicular to the surface of the column when moving along the guide component. Therefore, the present application can be applicable to concrete strength testing of rectangular columns, and can also be applicable to concrete strength testing of cylindrical columns. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the three-dimensional structure of a concrete strength detection device provided by an embodiment of the present invention; Figure 2 A structural schematic diagram of a support leg of a concrete strength detection device provided by an embodiment of the present invention; Figure 3 A schematic structural diagram of a first slide frame of a concrete strength detection device provided by an embodiment of the present invention; Figure 4 A schematic diagram of a partial cross-sectional structure of a first slide frame of a concrete strength detection device provided by an embodiment of the present invention; Figure 5 A schematic diagram of the structure of a positioning plate and a positioning column of a concrete strength detection device provided by an embodiment of the present invention; Figure 6 A schematic diagram of the main frame, slide rod and slide frame structure of a concrete strength detection device provided by an embodiment of the present invention; Figure 7 A schematic diagram of the structure of a slide bar, a suspension plate and an elastic member of a concrete strength detection device provided by an embodiment of the present invention; Figure 8 A schematic diagram of the structure of an installation body and a guide wheel assembly of a concrete strength detection device provided by an embodiment of the present invention; Fig. 9 A schematic structural diagram of a guide wheel assembly of a concrete strength detection device provided in an embodiment of the present invention.

[0027] Reference numerals: 1. Main frame; 2. Mounting body; 3. Moving seat; 4. Slide; 5. Rebound tester; 6. Fixed end; 7. Movable end; 8. Mounting rod; 9. Suction cup; 10. First slide; 11. Sliding hole; 12. Positioning column; 13. Positioning plate; 14. Second through hole; 15. Positioning bolt; 16. Wheel frame; 17. Second roller; 18. Front wheel axle; 19. First swing arm; 20. Second swing arm; 21. Third roller; 22. First gear; 23. Bearing seat; 24. Second gear; 25. Locking wheel; 26. Locking rod; 27, positioning rod; 28, first drive motor; 29, cleaning roller; 30, third synchronous wheel; 31, first synchronous belt; 32, second synchronous belt; 33, first synchronous wheel; 34, base; 35, guide rod; 36, second drive motor; 37, screw; 38, vertical drive assembly; 39, limit rod; 40, slide rod; 41, ear plate; 42, suspension plate; 43, elastic member; 44, first roller; 45, reset spring; 46, handle; 47, drive wheel; 201, middle mounting plate; 202, side mounting plate. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0029] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection" and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "connection" can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed" means that they are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present invention, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0030] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0031] In the embodiments of the present invention, "and / or" is only a description of the association relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0032] In the prior art, there are many ways to test the concrete strength of a column, including the rebound method. When the rebound method is used to measure the concrete strength of a column, multiple measuring areas are set in the vertical direction of the column, and 16 measuring points are set in each measuring area. Each measuring point is measured one by one by using a rebound hammer 5, and the rebound value is recorded. In this process, the rebound hammer 5 needs to always remain perpendicular to the surface to be measured. If there is an angle of deviation, a large error will occur.

[0033] For rectangular columns, there are already a variety of auxiliary mechanisms in the prior art to help the rebound tester 5 to automatically move during the measurement process and always be perpendicular to the surface to be measured. However, the existing auxiliary mechanisms are only applicable to rectangular columns, and no auxiliary mechanisms are provided for cylindrical columns.

[0034] For arc-surface columns with large arc surfaces, since the diameter of the columns is large, their surfaces can be approximately regarded as planes, and the rebound method can be used to test the concrete strength of the column surfaces. However, when using existing auxiliary mechanisms for measurement, it cannot effectively help the rebound tester 5 to be perpendicular to the surface to be measured. On the contrary, as the movement progresses, the deflection angle between the rebound tester 5 and the surface to be measured will gradually increase. Therefore, the present invention provides a concrete strength testing device, which can be used not only for concrete strength testing of rectangular columns, but also for concrete strength testing of large-diameter circular columns.

[0035] like Figure 1-Figure 9 As shown, a concrete strength testing device comprises a main frame 1, the main frame 1 can be fixed on the surface of the test piece, and a guide component is provided on the main frame 1 to form a guide path of equal width in cooperation with the surface of the test piece; A mobile platform is installed in the main frame 1, and the mobile platform includes a mounting body 2. Guide wheel assemblies driven by a motor are symmetrically installed at both ends of the mounting body 2. The guide wheel assemblies can automatically adapt to the width of the guide assembly, so that the mobile platform can always be perpendicular to the surface of the test piece and can reciprocate along the guide assembly; A moving seat 3 which can reciprocate along the length direction of the moving platform is arranged on the installation body 2; a slide 4 which can reciprocate along the height direction of the moving platform (perpendicular to the surface of the column) is installed on the moving seat 3, and a rebound tester 5 is installed on the slide 4.

[0036] The main frame 1 can be fixed on the surface of the workpiece to be tested, and its size should completely cover the rectangular test area. By driving the mobile platform to move horizontally (along the width direction of the mobile platform), the mobile seat 3 can be driven to move to different columns of the test area. When the mobile seat 3 moves longitudinally (along the length direction of the mobile platform) on the mobile platform, it can move to different measuring points in the same column of the test area. Regardless of the horizontal movement of the mobile platform or the longitudinal movement of the mobile seat 3 on the mobile platform, the rebound hammer 5 on the slide 4 can always remain perpendicular to the measuring point. Each time it moves to a measuring point, the actuator on the mobile seat 3 drives the slide 4 to approach the measuring point until the rebound hammer 5 completes the detection, and then resets through the actuator to complete the reset of the rebound hammer 5. Repeating the above actions can automatically complete the detection of each measuring point in the test area.

[0037] Further, such as Figure 6 As shown, in order to limit the longitudinal displacement of the mobile platform, four limit rods 39 are installed on the main frame 1, and the limit rods 39 are set to a circular or rectangular rod body. In this embodiment, the limit rods 39 are set to a circular rod body to provide longitudinal limitation for the mobile platform. Setting it to a circular shape can reduce the contact area with the mobile platform, so that when the mobile platform moves laterally, the friction contact with the limit rods 39 is reduced. When the mobile platform moves laterally, the limit rods 39 can prevent the mobile platform from deviating toward the guide assembly on one side.

[0038] Since the measuring area is generally set to a square of 20 cm × 20 cm, the main frame 1 can be preferably set to a rectangular frame. Since the main frame 1 needs to be fixed on a column with an arc surface, and the diameters of different columns may be different, in order to maintain stability, a fixing mechanism needs to be set on the main frame 1 to be fixedly connected to the column. In the present invention, the main frame 1 is fixed by setting a support foot. By installing a suction cup 9 at the end of the support foot, the suction cup 9 is connected to a vacuum generator (vacuum pump). When the main frame 1 needs to be fixed on the arc surface, When the suction cup 9 is on the surface of the column, the suction cup 9 is brought into contact with the surface of the column, and then the vacuum generator is energized. The vacuum generator generates negative pressure on the suction cup 9 through the pipeline, thereby adsorbing the main frame 1 on the column, thereby completing the fixation of the main frame 1. After fixation, the air guide path of the suction cup 9 is closed through the valve, so that after the vacuum generator is closed, the suction cup 9 can still be adsorbed on the surface of the column under the action of negative pressure. In order to make the guide paths formed by the guide components on both sides symmetrical to each other, the side panels of the main frame 1 on which the guide components are not installed are parallel to the vertical axis of the column.

[0039] Further, such as Figure 1-Figure 2As shown, in order to adapt to columns of different diameters and to ensure firm adsorption, the support leg is provided with a fixed end 6 and a movable end 7, wherein the fixed end 6 is fixedly connected to the main frame 1, and the movable end 7 is connected to the fixed end 6 by bolts, and the angle between the movable end 7 and the fixed end 6 can be adjusted by loosening the bolts so that the movable end 7 can face the surface of the column, and a mounting rod 8 is installed on the movable end 7, and a suction cup 9 is installed at the end of the mounting rod 8, and an air inlet and outlet connected to the vacuum generator are provided on the mounting rod 8. When the movable end 7 faces the surface of the column, the mounting rod 8 is perpendicular to the surface of the column, and the suction cup 9 can be close to the surface of the column through the movable end 7 and the mounting rod 8, so as to increase the contact area between the suction cup 9 and the surface of the column and improve the stability during adsorption.

[0040] like Figure 1 As shown, the guide assembly includes a first slide 10 and a second slide mounted on the inner wall of the main frame 1. The first slide 10 and the second slide are symmetrically arranged on two opposite inner walls of the main frame 1 so as to form two guide paths symmetrical up and down. When guiding the mobile platform, the guide wheel assembly is limited by the two guide paths formed by the guide assembly and the surface of the column, so that the guide wheel assemblies at both ends of the mobile platform can only move along the guide paths, and during the movement, the guide wheel assembly will not deflect relative to the guide assembly, so that the mobile platform can move smoothly laterally along the guide path, and the mobile platform is always kept perpendicular to the surface to be measured; like Figure 3-Figure 4 , Figure 6-Figure 7 As shown, the first slide 10 and the second slide have the same structure, both of which include a slide body, which is horizontally arranged, and has a plurality of through sliding holes 11, in which a slide rod 40 capable of sliding in the same direction is slidably installed, so that the bottom of the slide rod 40 can adaptively adjust the height when it contacts the surface of the column, and an ear plate 41 is installed on the upper part of the slide rod 40, and the ear plate 41 is perpendicular to the side of the slide rod 40 facing the moving platform, when the slide rod 40 is adaptively adjusted in height, the ear plate 41 is adjusted together, and the ear plate 41 forms an arc-shaped guide rail adapted to the curvature of the column surface, The curvature of the arc guide rail is adapted to the curvature of the column surface, and the smaller the width of the slide rod 40, the smaller the spacing between the slide rods 40, and the smoother the arc guide rail formed by the ear plate 41. A hanging plate 42 is arranged above the ear plate 41, and both ends of the hanging plate 42 are fixedly connected to the main frame 1. An elastic member 43 is fixed between the ear plate 41 and the hanging plate 42. The elastic member 43 applies a force toward the column surface to the slide rod 40, so that the lower part of the slide rod 40 can be close to the column surface, so that the arc guide rail formed by the ear plate 41 completely corresponds to the curvature of the column surface to form a guide path.

[0041] Furthermore, a first roller 44 is installed at the bottom end of the slide rod 40, and the wheel axle of the first roller 44 is arranged parallel to the slide body. After completing a measurement area detection, first adjust the guide wheel assembly so that the width of the guide wheel assembly is smaller than the guide path width, and then open the valve to connect the suction cup 9 with the external air, thereby releasing the adsorption effect of the suction cup 9. At this time, the main frame 1 is moved vertically, and the first roller 44 can roll freely. After adjusting to the new measurement area, there is no need to adjust the support foot structure again. The negative pressure generator can be directly started to make the suction cup 9 adsorbed and fixed in the new measurement area, thereby conveniently completing the fixation of the main frame 1, and then readjust the guide wheel assembly so that the guide wheel assembly is adapted to the guide path width, and repeat the test action. By setting the first roller 44, the adjustment of the vertical position of the main frame 1 can be simplified.

[0042] In this embodiment, the elastic member 43 is configured as a spring, and in order to maintain the stability of the spring, a guide rod is also installed between the suspension plate 42 and the ear plate 41. The spring is sleeved on the guide rod. The guide rod includes a sleeve fixed to the upper part of the ear plate 41 and an insertion rod fixed to the lower side of the suspension plate 42. The insertion rod extends into the sleeve so that the spring always remains vertical during the compression and elongation process.

[0043] like Figure 1 , Figure 5 As shown, after the main frame 1 is fixed through the above actions, a preliminary guide path is obtained, and then the preliminary guide path needs to be locked to maintain the stability of the guide path during the guiding process. Therefore, a positioning component is also provided on the outside of the main frame 1, and a positioning column 12 is provided on the positioning component. The positioning column 12 passes through the main frame 1 and the slide body and contacts with the slide rod 40. The state of the slide rod 40 can be changed through the positioning component. When the positioning component is not locked, the slide rod 40 can slide up and down. When the positioning component is locked, the slide rod 40 cannot move.

[0044] The specific process is as follows: when the main frame 1 is not fixed on the surface of the column, there is no force on the bottom of the slide rod 40, and the slide rod 40 is fully extended under the force of the elastic member 43 until the ear plate 41 contacts the slide frame body to limit the position; in the process of fixing the main frame 1 on the surface of the column, the bottom of the slide rod 40 gradually contacts the surface of the column (the middle slide rod 40 contacts the surface of the column first, and the slide rods 40 at both ends contact the surface of the column last), the slide rod 40 moves upward along the slide hole 11 (towards the hanging plate 42), and the elastic members 43 are compressed one by one until the bottom of the slide rod 40 contacts the surface of the column completely, and the movement of the slide rods 40 on both sides is symmetrical, and the main frame 1 is fixed.

[0045] At this time, the ear plate 41 of the first slide 10 forms a first arc path with the surface of the column, and the ear plate 41 of the second slide forms a second arc path with the surface of the column. The first arc path and the second arc path are parallel to each other, and the widths of the first arc path and the second arc path are always the same, that is, the distance from the ear plate 41 to the surface of the column. The slide rod 40 is then locked by the positioning assembly to keep the first arc path and the second arc path stable.

[0046] Furthermore, the positioning assembly includes a positioning plate 13, a plurality of positioning posts 12 are arranged on one side of the positioning plate 13, a first through hole is opened on the main frame 1, and a second through hole 14 is arranged on the slide body (refer to Figure 3 or Figure 4 ), the first through hole and the second through hole 14 correspond to each other one by one, the positioning column 12 extends into the first through hole and the second through hole 14, the positioning plate 13 is also provided with a mounting hole, and the main frame 1 is provided with an adjusting threaded hole corresponding to the mounting hole, and a positioning bolt 15 is rotatably installed in the mounting hole, the positioning bolt 15 is connected to the adjusting threaded hole through a thread, and a distance is left between the positioning plate 13 and the main frame 1.

[0047] When the distance between the positioning plate 13 and the main frame 1 is large, the positioning assembly is not locked. At this time, the positioning column 12 is located in the first through hole and / or the second through hole 14, and the positioning column 12 is not in contact with the sliding rod 40. The sliding rod 40 is not subjected to the force of the positioning column 12 and can therefore slide freely in the sliding hole 11.

[0048] When the distance between the positioning plate 13 and the main frame 1 is small, the positioning assembly is locked. At this time, the positioning column 12 passes through the first through hole and the second through hole 14 and contacts the slide bar 40, so that the positioning column 12 can apply force to the slide bar 40 to complete the locking.

[0049] Further, such as Fig. 9 As shown, the guide wheel assembly includes a wheel frame 16, on which a lower roller assembly and an upper roller assembly are installed that are symmetrically arranged along the central axis, wherein the lower roller assembly has at least two rolling support points on the surface of the column, and the upper roller assembly has at least one rolling support point on the arc guide rail formed by the ear plate 41, and each rolling support point is symmetrical along the central axis vertically toward the surface of the column, and the spacing between the lower roller assembly and the upper roller assembly can be adjusted to adapt to the width of the first arc path and the second arc path. When the lower roller assembly is in contact with the surface to be measured, the central axis of symmetry is always perpendicular to the surface of the column, so that the moving platform can always be perpendicular to the surface of the column.

[0050] Specifically, refer to Figure 8The lower roller assembly includes a front wheel axle 18 and a rear wheel axle rotatably mounted at the lower part of the wheel frame 16. The front wheel axle 18 and the rear wheel axle are arranged parallel to the mobile platform. The front wheel axle 18 and the rear wheel axle are symmetrically arranged on both sides of the mobile platform in the width direction. The ends of the front wheel axle 18 and the rear wheel axle are respectively mounted with second rollers 17. The front wheel axle 18 and the rear wheel axle are driven to rotate by a synchronous driving mechanism. The upper roller assembly has at least one rolling support point on the arc guide rail formed by the ear plate 41. When there is only one rolling support point, a vertical (perpendicular to the surface of the column) height-adjustable support rod is arranged on the wheel frame 16, and a third roller 21 is arranged at the end of the support rod, and the symmetry axis of the support rod is perpendicular to the surface to be measured. The symmetry center axis of the support rod coincides with the guide wheel assembly, so that the third roller 21 abuts against the arc guide rail formed by the ear plate 41, so that the second roller 17 of the lower roller assembly is always in contact with the surface of the column.

[0051] In order to improve stability, two rolling support points may also be provided. Specifically, in this embodiment, in order to improve stability, the upper roller assembly has two rolling support points on the arc-shaped guide rail formed by the ear plate 41, such as Fig. 9 As shown, it includes a first swing arm 19 and a second swing arm 20 rotatably installed on the upper part of the wheel frame 16. When the first swing arm 19 and the second swing arm 20 rotate, they will rotate synchronously in opposite directions. A third roller 21 is installed at the ends of the first swing arm 19 and the second swing arm 20. A locking assembly for locking the first swing arm 19 and the second swing arm 20 is also installed on the wheel frame 16. By adjusting the first swing arm 19 and the second swing arm 20, the third roller 21 can fit tightly into the arc guide rail formed by the top ear plate 41, and the second roller 17 can fit tightly into the surface of the column. At this time, the symmetric central axis of the guide wheel assembly is always perpendicular to the surface of the column, and the installation body 2 is parallel to the symmetric central axis of the guide wheel assembly, so the installation body 2 can also always be perpendicular to the surface of the column.

[0052] The first swing arm 19 and the second swing arm 20 swing synchronously and in opposite directions through the transmission assembly. Specifically, the bottom of the first swing arm 19 and the second swing arm 20 are rotatably connected to the bearing seat 23 on the wheel frame 16 through a rotating shaft. A first gear 22 is installed on the rotating shaft of the first swing arm 19, and a second gear 24 is installed on the rotating shaft of the second swing arm 20. The first gear 22 is meshed with the second gear 24. Therefore, when the first swing arm 19 rotates, the second swing arm 20 will rotate synchronously in the opposite direction.

[0053] Furthermore, the locking assembly includes a locking wheel 25 mounted on the first swing arm 19, the axis of the locking wheel 25 coincides with the rotation axis of the first swing arm 19, a plurality of locking grooves are provided along the circular edge of the locking wheel 25, a locking rod 26 is provided on one side of the locking wheel 25, the lower end of the locking rod 26 is rotatably connected to the wheel frame 16, and a locking tooth is provided on the side of the locking rod 26 close to the locking wheel 25. When the locking tooth is engaged in the locking groove, the locking wheel 25 can be locked so that the locking wheel 25 cannot rotate, thereby completing the positioning of the first swing arm 19 and the second swing arm 20, and the locking rod 26 is locked. A positioning tooth and a positioning rod 27 are provided on the side 26 away from the locking wheel 25. The positioning tooth is integrally formed on the locking rod 26. The lower end of the positioning rod 27 is rotatably connected to the wheel frame 16. The upper end of the positioning rod 27 is provided with a positioning groove adapted to the positioning tooth. After the locking tooth is inserted into the locking groove, the positioning rod 27 is rotated so that the positioning groove cooperates with the positioning tooth. At this time, the positioning rod 27, the locking rod 26 and the connecting line of the rotation axes of the two rods form a triangular support structure, so that the positioning rod 27 can stably support the locking rod 26, and the locking rod 26 can stably lock the locking wheel 25.

[0054] like Figure 8-Figure 9 As shown, the synchronous drive mechanism includes a first drive motor 28 installed on the wheel frame 16, a first synchronous wheel 33 and a second synchronous wheel are installed on the output shaft of the first drive motor 28, a third synchronous wheel 30 is installed on the front wheel shaft 18, and a fourth synchronous wheel is installed on the rear wheel shaft. The first synchronous wheel 33 and the third synchronous wheel 30 are connected by a first synchronous belt 31, and the second synchronous wheel and the third synchronous wheel 30 are connected by a second synchronous belt 32. The first drive motor 28 is a servo motor or a stepping motor. The first drive motor 28 drives the first synchronous wheel 33 and the second synchronous wheel to rotate. The first synchronous wheel 33 and the second synchronous wheel drive the third synchronous wheel 30 and the fourth synchronous wheel to rotate through the first synchronous belt 31 and the second synchronous belt 32, and the third synchronous wheel 30 and the fourth synchronous wheel drive the front wheel shaft 18 and the rear wheel shaft to rotate, and the front wheel shaft 18 and the rear wheel shaft drive the second roller 17 to rotate. The rotation of the second roller 17 can drive the mobile platform to move laterally.

[0055] Furthermore, cleaning rollers 29 are installed on the front wheel axle 18 and the rear wheel axle. The bristles of the cleaning rollers 29 are in contact with the surface of the column. When the first drive motor 28 drives the front wheel axle 18 and the rear wheel axle to rotate synchronously, it can not only drive the mobile platform to move laterally, but also drive the cleaning rollers 29 to rotate to clean the surface of the column.

[0056] like Figure 6 , Figure 8As shown, the installation body 2 includes a middle installation plate 201 in the middle and side installation plates 202 on both sides, a wheel frame 16 is installed on the side installation plates 202, and a plurality of limit rods 39 are installed on the main frame 1, the limit rods 39 are in contact with the side installation plates 202 to limit the longitudinal displacement of the installation body 2, an axial movable slide is installed on the middle installation plate 201, the axial movable slide is arranged along the longitudinal direction of the middle installation plate 201, and the movable seat 3 is installed on the axial movable slide.

[0057] The axially movable slide includes a base 34 fixedly connected to the middle mounting plate 201, a first fixed plate and a second fixed plate are arranged on the base 34, a guide rod 35 is fixed between the first fixed plate and the second fixed plate, a screw 37 is rotatably connected to the fixed plate and the second fixed plate through a bearing, the guide rod 35 and the screw 37 are both arranged along the length direction of the movable platform, one end of the screw 37 is connected to the output shaft of the second driving motor 36, a sliding seat is slidably connected to the guide rod 35, the screw 37 is connected to the sliding seat through a thread, a moving seat 3 is installed on the sliding seat, the output shaft of the second driving motor 36 drives the screw 37 to rotate, and the rotation of the screw 37 can drive the sliding seat to reciprocate along the guide rod 35, thereby driving the moving seat 3 to reciprocate along the guide rail direction.

[0058] A slide 4 is installed on the moving seat 3, which is perpendicular to the surface of the column and can reciprocate in the vertical direction (the height direction of the moving platform). Specifically, a vertical slide groove is set on the moving seat 3, and the slide 4 is slidably connected in the slide groove. A rebound tester 5 is installed on the slide 4. A vertical driving component 38 is installed on the moving seat 3, and the vertical driving component 38 drives the slide 4 to reciprocate along the slide groove.

[0059] The vertical drive component 38 can be a cylinder, a drive motor, etc. When the vertical drive component 38 is a cylinder, the output shaft of the cylinder is fixedly connected to the slide 4. When the output shaft is extended by the cylinder, it can drive the slide 4 to move downward. When the slide 4 moves downward, it can drive the rebound tester 5 to move downward synchronously. The output shaft of the rebound tester 5 contacts the measuring point to complete the strength test of the measuring point. After the test is completed, the output shaft is retracted by the cylinder to drive the slide 4 to move upward, thereby completing the resetting of the slide 4.

[0060] Furthermore, in order to facilitate the adaptation of the guide wheel assembly and the guide assembly, a return spring 45 is installed between the first rocker arm 19 and the second rocker arm 20, and a driving wheel 47 is installed on the rotating axis of the first rocker arm 19 and / or the second rocker arm 20. The driving wheel 47 is provided with a plurality of mounting holes, and a handle 46 is detachably installed in the mounting hole.

[0061] The working principle of the present invention is as follows: when it is necessary to test the concrete strength of a cylindrical column, firstly, the first swing arm 19 and the second swing arm 20 are unlocked, and then the handle 46 is manually rotated to make the first swing arm 19 and the second swing arm 20 move away from each other. At this time, the distance between the second roller 17 and the third roller 21 is short, and the third roller 21 does not contact the ear plate 41. Then, the first swing arm 19 and the second swing arm 20 are locked by the locking assembly. Then, the main frame 1 is fixed on the surface of the column, and when fixed, the center line of the main frame 1 is kept closest to the surface of the column, and the two side walls of the main frame 1 without the slide bar 40 are arranged vertically. Initially, only the bottom of the slide bar 40 in the middle is in contact with the surface of the column; Then adjust the support feet so that the suction cup 9 on the support feet faces the surface of the column, and presses the main frame 1 against the surface of the column, so that the bottom of all the sliding rods 40 can fit with the surface of the column, the elastic members 43 between each sliding rod 40 and the suspension plate 42 are in a compressed state, and the ear plates 41 of each sliding rod 40 are at relative distances from the surface of the column, thereby forming an arc path of equal width; finally, the suction cup 9 is fit with the surface of the column, and the negative pressure generator is started so that the suction cup 9 is adsorbed on the surface of the column, and a check valve is provided between the air outlet of the mounting rod 8 and the air suction port of the negative pressure generator, and an electric valve is provided at the air inlet of the mounting rod 8. After the suction cup 9 generates sufficient negative pressure, the negative pressure generator is closed and the solenoid valve is closed at the same time, thereby completing the adsorption action of the suction cup 9. When the adsorption needs to be released, the solenoid valve is opened, and the suction cup 9 is connected to the external air pressure.

[0062] Then, by manually rotating the positioning bolt 15, the distance between the positioning plate 13 and the main frame 1 can be adjusted, so that the positioning plate 13 moves toward the side close to the main frame 1, and the positioning column 12 on the positioning plate 13 passes through the first through hole and the second through hole 14 and contacts the sliding rod 40, so that the positioning column 12 can apply force to the sliding rod 40 to complete the locking.

[0063] After forming a stable equal-width guide path, the lock of the first rocker arm 19 and the second rocker arm 20 is released, and the first rocker arm 19 and the second rocker arm 20 are moved closer to each other under the action of the reset spring 45. The third rollers 21 at the upper ends of the first rocker arm 19 and the second rocker arm 20 are respectively pressed on the arc guide rail formed by the multiple ear plates 41. At this time, the second roller 17 and the column surface have two rolling support points, and the arc guide rail formed by the third roller 21 and the ear plate 41 has two rolling support points, and the central axis of the four rolling support points is symmetrical, and the symmetrical central axis is always perpendicular to the column surface, and the moving platform is parallel to the symmetrical central axis, so the moving platform is always perpendicular to the column surface.

[0064] Subsequently, the front wheel axle 18 and the rear wheel axle are driven to rotate synchronously by the first driving motor 28, thereby driving the mobile platform to move laterally, so that the mobile platform can be adjusted to different columns of the measuring area. When the first driving motor 28 drives the front wheel axle 18 and the rear wheel axle to rotate synchronously, it can not only drive the mobile platform to move laterally to move the mobile platform to different columns of the points to be measured, but also drive the cleaning roller 29 to rotate to clean the surface of the column, so that the surface of the points to be measured is always kept clean to prevent debris from affecting the detection of the rebound tester 5.

[0065] After completing the position adjustment of the column to be measured in the measuring area, the position of the moving seat 3 is adjusted so that the moving seat 3 is moved to the position of different points to be measured. Specifically, the second driving motor 36 can drive the screw 37 to rotate, and the rotation of the screw 37 can drive the slide table to reciprocate along the guide rod 35, thereby driving the moving seat 3 to reciprocate along the direction of the guide rod 35, so that the moving seat 3 is moved to different measuring points, thereby completing the measurement of different points to be measured in the same column; After determining the position of the test point, the rebound detection action of the test point is completed by adjusting the position of the slide 4. Specifically, the vertical drive component 38, that is, the output shaft of the cylinder or the electric cylinder is extended to drive the slide 4 to move downward along the slide groove. At this time, the rebound hammer 5 on the slide 4 moves vertically toward the surface of the column, and the output rod of the rebound hammer 5 abuts against the surface of the column and then is completely compressed to complete the measurement action of the rebound hammer 5. Then the output shaft of the cylinder or the electric cylinder is retracted, and the rebound hammer 5 is reset, thereby completing a measurement.

[0066] By repeating the above-mentioned positioning process of the main frame 1, the position adjustment of the column to be measured in the measuring area of ​​the mobile platform, the position adjustment of the point to be measured in the measuring area of ​​the mobile seat 3, the measuring action of the rebound hammer 5, and the resetting action of the rebound hammer 5, the concrete strength test of the measuring area can be completed. It is not only suitable for the concrete strength test of rectangular columns, but also for the concrete strength test of cylindrical columns. During the test, the rebound hammer 5 can always be kept vertically facing the point to be measured, thereby improving the test efficiency and quality.

[0067] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention; the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A concrete strength detection device, characterized in that: The invention comprises a main frame (1) fixed to the surface of a column to be measured, the main frame (1) being provided with a guide assembly for forming a guide path of equal width in cooperation with the surface of the column to be measured, the guide assembly comprising a slide frame arranged at two opposite sides of the main frame (1), a plurality of slide bars (40) being slidably mounted on the slide frame, the slide bars (40) being provided with elastic members (43) in the direction of the sliding path, the elastic members (43) being mounted on the main frame (1), the slide bars (40) being provided with ear plates (41), the bottom of the slide bars (40) being in contact with the column, the ear plates (41) and the surface of the column forming a guide path of equal width, and the main frame (1) being provided with a positioning assembly for locking the slide bars (40); A mobile platform is installed between the guide assemblies, and the mobile platform reciprocates along the guide assemblies. Guide wheel assemblies are symmetrically installed at both ends of the mobile platform. The guide wheel assemblies have at least three rolling support points on the guide assemblies, and the rolling support points are symmetrical about the central axis in the direction perpendicular to the surface of the cylinder, and the mobile platform is arranged parallel to the central axis; A moving seat (3) is arranged on the moving platform; the moving seat (3) reciprocates along the length direction of the moving platform; a slide table (4) perpendicular to the surface of the column is slidably mounted on the moving seat (3); the slide table (4) is capable of reciprocating in a direction perpendicular to the surface of the column; a rebound tester (5) is mounted on the slide table (4).

2. A concrete strength detection device according to claim 1, characterized in that: A plurality of supporting feet are arranged outside the main frame (1), the supporting feet comprising a fixed end (6) and a movable end (7) capable of adjusting an angle, and an adsorption mechanism is installed on the movable end (7).

3. A concrete strength detection device according to claim 1, characterized in that: A limiting rod (39) is installed between the guide assemblies, and the limiting rod (39) is used to limit the displacement of the mobile platform toward one of the guide assemblies.

4. A concrete strength detection device according to claim 3, characterized in that: The positioning assembly comprises a positioning plate (13) mounted on the main frame (1), the spacing between the positioning plate (13) and the main frame (1) being adjustable, a positioning column (12) being arranged on the positioning plate (13), the positioning column (12) penetrating the main frame (1) and the slide frame and arranged towards the slide rod (40), the positioning column (12) performing a locking action when in contact with the slide rod (40), and the slide rod (40) being able to slide back and forth when the positioning column (12) is not in contact with the slide rod (40).

5. A concrete strength detection device according to claim 1, characterized in that: The guide wheel assembly comprises a wheel frame (16), on which is mounted a lower roller assembly for fitting against a cylindrical surface, and an upper roller assembly for fitting against an upper side of the guide assembly, wherein the spacing between the lower roller assembly and the upper roller assembly is adjustable to match a guide path width of the guide assembly, and the lower roller assembly has at least two rolling support points on the cylindrical surface.

6. A concrete strength detection device according to claim 5, characterized in that: The lower roller assembly comprises a lower roller driven to rotate by a motor, and the lower rollers are symmetrically arranged on both sides of the mobile platform in the width direction. When the lower rollers are pressed on the surface of the column, the mobile platform is perpendicular to the surface of the column, and a cleaning roller (29) is installed on the wheel axle of the lower roller.

7. A concrete strength detection device according to claim 5, characterized in that: The upper roller assembly has two rolling support points on the guide assembly, including a first swing rod (19) and a second swing rod (20) that rotate synchronously in opposite directions, upper rollers are mounted at the ends of the first swing rod (19) and the second swing rod (20), and a locking assembly is provided on one side of the upper roller assembly to lock the first swing rod (19) and the second swing rod (20) in place.

8. A concrete strength detection device according to claim 7, characterized in that: The locking assembly comprises a locking wheel (25) mounted on a first swing rod (19), the locking wheel (25) and the first swing rod (19) having a common rotation axis, a locking rod (26) being arranged on one side of the locking wheel (25), the lower end of the locking rod (26) being rotationally connected to the wheel frame (16), the locking rod (26) approaching or moving away from the locking wheel (25) when rotating, the locking rod (26) being arranged with locking teeth, a positioning rod (27) being arranged on one side of the locking rod (26), and the positioning rod (27) being able to prevent the locking rod (26) from separating from the locking wheel (25) when supporting the locking rod (26).

9. A concrete strength detection device according to claim 5, characterized in that: The upper roller assembly has a rolling support point on the guide assembly. The upper roller assembly includes a support rod with adjustable vertical height. The support rod coincides with the symmetrical central axis of the lower roller assembly, and the upper roller is installed on the top of the support rod.

10. A concrete strength detection device according to claim 5, characterized in that: The wheel axle of the lower roller assembly is arranged along the length direction of the moving platform.

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