A concrete strength detection device

Abstract

The present invention belongs to the technical field of concrete strength detection, and in particular relates to a concrete strength detection device, which includes a main frame fixed on the surface of a column to be measured. A guiding component for forming an equal-width guiding path in cooperation with the surface of the column to be measured is arranged on the main frame. The guiding component includes sliding frames arranged on two opposite sides of the main frame. A plurality of sliding rods are slidably installed on the sliding frames. Elastic members are arranged on the sliding rods in the sliding path, and the elastic members are installed on the main frame. Ear plates are arranged on the sliding rods, the bottoms of the sliding rods are in contact with the column body, and an equal-width guiding path is formed between the ear plates and the surface of the column body. A positioning component for locking the sliding rods is arranged on the main frame. The present invention can not only be applicable to the concrete strength detection of rectangular columns, but also can perform concrete strength detection on cylindrical columns. During the detection process, the rebound instrument can always be kept vertically facing the point to be measured, improving the detection efficiency and quality.

Description

Technical Field

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

[0002] Concrete strength detection runs through the entire life cycle of a project and is a core means to ensure structural safety, durability, and compliance. Common methods include the rebound method and the core drilling method. Among them, the rebound method uses a rebound hammer to strike the surface of the concrete, calculates the surface hardness based on the rebound value, and converts the strength in combination with the carbonation depth. It is simple, fast, non-destructive, and low-cost, and is suitable for large-scale general surveys.

[0003] The rebound hammer arranges measurement points according to "measurement areas". Each measurement area is usually a square of 20 cm × 20 cm and is relatively evenly distributed on the component to be measured. The measurement area is required to be clean, flat, without honeycombing, pockmarks, floating slurry, oil stains, etc. If necessary, use a grinding wheel to remove the loose materials and debris on the surface. When rebounding, the axis of the rebound hammer should be perpendicular to the concrete detection surface, avoiding the positions of stones or pores.

[0004] To improve efficiency, a bracket is also set up, and components such as a motor and a cylinder are installed on the bracket to drive the rebound hammer to move to the corresponding measurement points in sequence, and then automatically measure the measurement points. The measured value of the rebound hammer is observed through a camera or other visual devices.

[0005] For example, in CN202311133231.5, a concrete strength detection device for building construction can automatically clamp at both ends of the component when abutting against the building component, and drive the detection mechanism to perform mirror-image detection at both ends of the component through an adjustment component, which not only omits the cumbersome steps of manual detection but also ensures the detection accuracy of the mirror-image points of the component, greatly improving the detection convenience.

[0006] However, in existing prefabricated buildings, in addition to square and flat beams, columns, and precast concrete slabs, there are also cylindrical piers. For a large-diameter cylinder such as a pier, a 20×20 cm measurement area can be basically regarded as a plane, and the strength can also be detected by the rebound method.

[0007] However, when using the detection device shown in CN202311133231.5 for strength detection, since the rebound hammer on the detection device can only move along the X-axis and Y-axis when adjusting the position, and the movement trajectory forms a rectangular grid, when the rebound hammer moves to different positions, it cannot be perpendicular to the surface of the pier, resulting in a large error. Therefore, it is urgent to design a strength detection device suitable for the surface of a large-diameter cylinder to improve the strength detection efficiency of precast columns with a large-diameter circular arc surface. Summary of the Invention

[0008] The present invention provides a device for detecting the strength of concrete, aiming to provide a device that can be used for detecting the strength of concrete in rectangular columns and can also detect the strength of the surface of large-diameter cylindrical columns, improving the efficiency of detecting the strength of precast columns on the surface of large-diameter cylindrical columns.

[0009] The present invention provides the following technical solutions:

[0010] A device for detecting the strength of concrete includes a main frame fixed on the surface of a column to be measured. A guiding component for forming an equal-width guiding path in cooperation with the surface of the column to be measured is arranged on the main frame. The guiding component includes sliding frames arranged on two opposite sides of the main frame. A plurality of sliding rods are slidably installed on the sliding frames. Elastic members are arranged on the sliding rods in the sliding path direction, and the elastic members are installed on the main frame. Ear plates are arranged on the sliding rods. The bottom of the sliding rods is in contact with the column body, and the ear plates and the surface of the column body form an equal-width guiding path. A positioning component for locking the sliding rods is arranged on the main frame;

[0011] A moving platform is installed between the guiding components. The moving platform reciprocates along the guiding components. Guiding wheel components are symmetrically installed at both ends of the moving platform. The guiding wheel components have at least three rolling support points on the guiding components, and the rolling support points are axially symmetric in the direction perpendicular to the surface of the column body. The moving platform is arranged parallel to the axis;

[0012] A moving seat is arranged on the moving platform; the moving seat reciprocates along the length direction of the moving platform. A sliding table perpendicular to the surface of the column body is slidably installed on the moving seat. The sliding table can reciprocate in the direction perpendicular to the surface of the column body. A rebound hammer is installed on the sliding table.

[0013] An equal-width guiding path can be formed through the cooperation of the guiding component and the surface of the column body. The position of the moving platform can be conveniently adjusted through the cooperation of the guiding wheel component and the guiding path, while keeping the moving platform always perpendicular to the surface to be measured. By adjusting the position of the moving platform, the moving platform can be adjusted to different columns. By adjusting the position of the moving seat, the position of the moving seat at different measuring points in the same column can be adjusted. By driving the reciprocating movement of the sliding table, the detection and reset actions of the rebound hammer can be completed. Repeating the above actions can conveniently complete the detection of the strength of concrete in the measuring area.

[0014] By arranging sliding rods with the same sliding direction, the height can be adaptively adjusted when the sliding rods are in contact with the surface of the column body, so that the ear plates on the sliding rods and the surface of the column body form an equal-width guiding path. By arranging elastic members, a downward acting force along the sliding rods can be provided, so that the lower part of the sliding rods can always be in contact with the surface of the column body. By arranging a positioning component, the sliding rods after forming an equal-width guiding path can be locked to maintain the stability of the equal-width guiding path.

[0015] In a possible implementation, a plurality of support feet are provided on the outer side of the main frame body. The support feet include a fixed end and a movable end capable of adjusting the angle, and an adsorption mechanism is installed on the movable end.

[0016] By providing the fixed end and the movable end, the orientation of the adsorption mechanism can be adjusted, so that when the main frame body is fixed, the adsorption assembly is always facing the column body, thereby improving the stability of the main frame body when it is fixed on the column body.

[0017] In a possible implementation, a limiting rod is installed between the guiding components, and the limiting rod is used to limit the moving platform from deviating towards one of the guiding components.

[0018] In a possible implementation, the positioning component includes a positioning plate installed on the main frame body. The distance between the positioning plate and the main frame body can be adjusted. A positioning column is provided on the positioning plate. The positioning column penetrates the main frame body and the carriage and is arranged towards the sliding rod. When the positioning column contacts the sliding rod, a locking action is performed. When the positioning column does not contact the sliding rod, the sliding rod can slide reciprocally.

[0019] By adjusting the distance between the positioning plate and the main frame body, the positioning column can be made to approach or move 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 the adaptive height adjustment.

[0020] In a possible implementation, the guide wheel assembly includes a wheel frame. A lower roller assembly for fitting the surface of the column body and an upper roller assembly for fitting the upper side of the guiding component are installed on the wheel frame. The distance between the lower roller assembly and the upper roller assembly can be adjusted to adapt to the width of the guiding path of the guiding component. The lower roller assembly has at least two rolling support points on the surface of the column body.

[0021] By pressing the surface of the column body with the lower roller assembly, the sliding rod contacts the surface of the column body while the height is adaptively adjusted, so that the ear plate forms a continuous arc-shaped guide rail. By pressing the arc-shaped guide rail with the upper roller assembly, the lower roller assembly is always pressed against the surface of the column body, and the contact points between the lower roller assembly and the surface of the column body are symmetrical to each other, and the contact points between the upper roller assembly and the ear plate are symmetrical to each other. When the guide wheel assembly moves in the guiding component, it will not deflect, so the moving platform can always be kept perpendicular to the surface to be measured.

[0022] In a possible implementation, the lower roller assembly includes lower rollers driven by a motor to rotate, and the lower rollers are symmetrically arranged on both sides of the moving platform in the width direction. When the lower rollers press the surface of the column body, the moving platform is perpendicular to the surface of the column body, and a cleaning roller is installed on the axle of the lower roller.

[0023] By setting the cleaning roller, when the moving platform moves, it can drive the cleaning roller to clean the surface of the column, thereby avoiding the influence of the dirt on the surface to be measured on the concrete strength detection.

[0024] In a possible implementation manner, the upper roller assembly has two rolling support points on the guiding assembly, including a first swing rod and a second swing rod that rotate synchronously and reversely. The upper rollers are installed at the ends of the first swing rod and the second swing rod. A locking assembly is arranged on one side of the upper roller assembly to lock and position the first swing rod and the second swing rod.

[0025] By setting the first swing rod and the second swing rod that rotate synchronously and reversely, the contact points between the upper roller assembly and the ear plate are axisymmetric, and the distance between the upper roller and the lower roller can be adjusted to adapt to guiding paths of different widths.

[0026] In a possible implementation manner, the locking assembly includes a locking wheel installed on the first swing rod. The locking wheel and the first swing rod share a rotation axis. A locking rod is arranged on one side of the locking wheel. The lower end of the locking rod is rotatably connected to the wheel frame. When the locking rod rotates, it approaches or moves away from the locking wheel. Locking teeth are arranged on the locking rod. A positioning rod is arranged on one side of the locking rod. When the positioning rod supports the locking rod, it can prevent the locking rod from separating from the locking wheel.

[0027] The locking of the first swing rod and the second swing rod can be completed through the locking assembly to maintain the stability of the moving platform when moving in the first direction. By unlocking, the first swing rod and the second swing rod can be adjusted to adapt to guiding paths of different widths.

[0028] In a possible implementation manner, the upper roller assembly has one rolling support point on the guiding assembly. The upper roller assembly includes a support rod with adjustable vertical height. The support rod coincides with the symmetric central axis of the lower roller assembly. An upper roller is installed at the top of the support rod.

[0029] By setting the support rod with adjustable height, the distance between the upper roller and the lower roller can be adjusted, so as to adapt to guiding paths of different widths. And by arranging 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 axisymmetric, so as to keep the moving platform always perpendicular to the surface to be measured.

[0030] In a possible implementation manner, the wheel axle of the lower roller assembly is arranged along the length direction of the moving platform.

[0031] So that the cleaning roller can always be parallel to the surface to be measured, and the cleaning roller always contacts the surface to be measured. When the cleaning roller is driven to rotate, the surface to be measured can be cleaned.

[0032] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the present invention.

[0033] In the present invention, by providing slide bars with the same sliding direction, when the slide bars contact the surface of the column, the height can be adaptively adjusted, so that the ear plates on the slide bars form an equal-width guiding path with the surface of the column. By providing elastic members, a downward acting force along the slide bars can be provided, so that the lower part of the slide bars can always contact the surface of the column. By providing a positioning component, the slide bars after forming the equal-width guiding path can be locked to maintain the stability of the equal-width guiding path. When the moving platform moves along the guiding component, it can always be perpendicular to the surface of the upright column. Therefore, the present application can be applied to the concrete strength detection of rectangular upright columns and can also be applied to the concrete strength detection of cylindrical upright columns. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a three-dimensional structure diagram of a concrete strength detection device provided by an embodiment of the present invention;

[0035] Figure 2 is a structural diagram of the feet of a concrete strength detection device provided by an embodiment of the present invention;

[0036] Figure 3 is a structural diagram of the first slide frame of a concrete strength detection device provided by an embodiment of the present invention;

[0037] Figure 4 is a partial cross-sectional structural diagram of the first slide frame of a concrete strength detection device provided by an embodiment of the present invention;

[0038] Figure 5 is a structural diagram of the positioning plate and positioning column of a concrete strength detection device provided by an embodiment of the present invention;

[0039] Figure 6 is a structural diagram of the main frame body, slide bars and slide frames of a concrete strength detection device provided by an embodiment of the present invention;

[0040] Figure 7 is a structural diagram of the slide bars, suspension plates and elastic members of a concrete strength detection device provided by an embodiment of the present invention;

[0041] Figure 8 is a structural diagram of the installation main body and guiding wheel assembly of a concrete strength detection device provided by an embodiment of the present invention;

[0042] Figure 9 is a structural diagram of the guiding wheel assembly of a concrete strength detection device provided by an embodiment of the present invention.

[0043] Reference Signs:

[0044] 1. Main frame; 2. Installation main body; 3. Moving seat; 4. Slide table; 5. Rebound instrument; 6. Fixed end; 7. Movable end; 8. Installation rod; 9. Suction cup; 10. First sliding frame; 11. Slide hole; 12. Positioning column; 13. Positioning plate; 14. Second through hole; 15. Positioning bolt; 16. Wheel frame; 17. Second roller; 18. Front wheel shaft; 19. First swing rod; 20. Second swing rod; 21. Third roller; 22. First gear; 23. Bearing seat; 24. Second gear; 25. Locking wheel; 26. Locking rod; 27. Positioning rod; 28. First driving motor; 29. Cleaning roller; 30. Third synchronous pulley; 31. First synchronous belt; 32. Second synchronous belt; 33. First synchronous pulley; 34. Base; 35. Guide rod; 36. Second driving motor; 37. Screw; 38. Vertical driving assembly; 39. Limiting rod; 40. Slide rod; 41. Ear plate; 42. Hanging plate; 43. Elastic member; 44. First roller; 45. Return spring; 46. Handle; 47. Driving wheel; 201. Middle mounting plate; 202. Side mounting plate. Detailed Embodiment

[0045] The embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention.

[0046] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connection", "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, "communication" can be a direct communication or an indirect communication through an intermediate medium. Among them, "fixing" means that they are connected to each other and the relative positional relationship after connection remains unchanged. The orientation terms mentioned in the embodiments of the present invention, such as "inside", "outside", "top", "bottom", etc., are only with reference to the direction of the accompanying drawings. Therefore, the orientation terms used are for better and clearer description 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 thus cannot be understood as a limitation to the embodiments of the present invention.

[0047] In the embodiments of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0048] In the embodiments of the present invention, "and / or" is merely a relational description of associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, both A and B exist simultaneously, and B exists alone. Additionally, in this text, the character " / " generally indicates an "or" relationship between the associated objects before and after.

[0049] In the prior art, when detecting the concrete strength of a column, there are various methods, including the rebound method. When using the rebound method to measure the concrete strength of a column, multiple measuring areas are set vertically on the column, and 16 measuring points are set in each measuring area. The rebound instrument 5 measures each measuring point one by one, records the rebound value. During this process, the rebound instrument 5 needs to always be perpendicular to the surface to be measured. If there is a deflection angle, a large error will occur.

[0050] For rectangular columns, there are already various auxiliary mechanisms in the prior art to help the rebound instrument 5 move automatically and always be perpendicular to the surface to be measured during the measurement process. However, the existing auxiliary mechanisms are only applicable to rectangular columns and do not provide an auxiliary mechanism for cylindrical columns.

[0051] For the column with a large arc surface, since the diameter of the column is large, its surface can be approximately regarded as a plane, and the rebound method can be used to detect the concrete strength of the column surface. However, when using the existing auxiliary mechanism for measurement, it cannot effectively help the rebound instrument 5 be perpendicular to the surface to be measured. Instead, as it moves, the deflection angle between the rebound instrument 5 and the surface to be measured will gradually increase. Therefore, the present invention provides a concrete strength detection device that can be applicable not only to the concrete strength detection of rectangular columns but also to the concrete strength detection of circular columns with a large diameter.

[0052] As Figures 1-9 shown, a concrete strength detection device includes a main frame 1, which can be fixed on the surface of the workpiece to be measured. A guiding component is arranged on the main frame 1 to form an equal-width guiding path in cooperation with the surface of the workpiece to be measured;

[0053] A moving platform is installed inside the main frame 1. The moving platform includes an installation body 2. At both ends of the installation body 2, guiding wheel assemblies driven by motors are symmetrically installed. The guiding wheel assemblies can automatically adapt to the width of the guiding component, so that the moving platform can always be perpendicular to the surface of the workpiece to be measured and can reciprocate along the guiding component;

[0054] A moving seat 3 that reciprocates along the length direction of the moving platform is arranged on the installation body 2; a sliding table 4 that reciprocates along the height direction (perpendicular to the surface of the column) of the moving platform is installed on the moving seat 3, and a rebound instrument 5 is installed on the sliding table 4.

[0055] The main frame 1 can be fixed on the surface of the component to be measured, and its size should completely cover the rectangular measurement area. By driving the lateral movement of the moving platform (along the width direction of the moving platform), the moving seat 3 can be driven to move to different columns of the measurement area. When the moving seat 3 moves longitudinally (along the length direction of the moving platform) on the moving platform, it can move to different measurement points in the same column of the measurement area. And whether it is the lateral movement of the moving platform or the longitudinal movement of the moving seat 3 on the moving platform, the rebound hammer 5 on the sliding table 4 can always be kept perpendicular to the measurement point. Every time it moves to a measurement point, the actuator on the moving seat 3 drives the sliding table 4 to approach the measurement point until the rebound hammer 5 completes the detection, and then the actuator resets to complete the reset of the rebound hammer 5. Repeating the above actions can automatically complete the detection of each measurement point in the measurement area.

[0056] Further, as Figure 6 shown, in order to limit the longitudinal displacement of the moving platform, four limiting rods 39 are installed on the main frame 1. The limiting rods 39 are set as circular or rectangular rod bodies. In this embodiment, the limiting rods 39 are set as circular rod bodies to provide longitudinal limitation for the moving platform. Being set as circular can reduce the contact area with the moving platform, so that when the moving platform moves laterally, the frictional contact with the limiting rods 39 is reduced. When the moving platform moves laterally, the limiting rods 39 can prevent the moving platform from deviating towards one side of the guiding assembly.

[0057] Since the measurement area is generally set as a square with a size of 20 cm × 20 cm, therefore, the main frame 1 can preferably be set as a rectangular frame. Since the main frame 1 needs to be fixed on a cylindrical body with a circular arc surface, and the diameter sizes of different cylindrical bodies may also be different. In order to maintain stability, a fixing mechanism needs to be set on the main frame 1 to be fixedly connected with the cylindrical body. In the present invention, the supporting feet are set to play a role in fixing the main frame 1. By installing suction cups 9 at the ends of the supporting feet, the suction cups 9 are connected to a vacuum generator (vacuum pump). When it is necessary to fix the main frame 1 on a cylindrical body with a circular arc surface, the suction cups 9 are brought into contact with the surface of the cylindrical body, and then the vacuum generator is powered on. The vacuum generator makes the suction cups 9 generate negative pressure through the pipeline, thereby adsorbing the main frame 1 on the cylindrical body to complete the fixation of the main frame 1. After fixation, the air guiding path of the suction cups 9 is closed through a valve, so that after the vacuum generator is turned off, the suction cups 9 can still be adsorbed on the surface of the cylindrical body under the action of negative pressure. In order to make the guiding paths formed by the guiding assemblies on both sides symmetrical to each other, the side plate of the main frame 1 without installing the guiding assembly is parallel to the vertical axis of the cylindrical body.

[0058] Further, as Figures 1-2As shown in the figure, in order to adapt to cylinders with different diameters and ensure firm adsorption, the supporting feet are provided with a fixed end 6 and a movable end 7. 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. By loosening the bolts, the angle between the movable end 7 and the fixed end 6 can be adjusted so that the movable end 7 can face the surface of the cylinder directly. An installation rod 8 is installed on the movable end 7, and a suction cup 9 is installed at the end of the installation rod 8. An air inlet and outlet connected to a vacuum generator is provided on the installation rod 8. When the movable end 7 faces the surface of the cylinder directly, the installation rod 8 is perpendicular to the surface of the cylinder. Through the movable end 7 and the installation rod 8, the suction cup 9 can be closely attached to the surface of the cylinder, so as to increase the contact area between the suction cup 9 and the surface of the cylinder and improve the stability during adsorption.

[0059] As Figure 1 shown in the figure, the guiding assembly includes a first sliding frame 10 and a second sliding frame installed on the inner wall of the main frame 1. The first sliding frame 10 and the second sliding frame are symmetrically arranged on two opposite inner walls of the main frame 1 so as to form two symmetrically arranged guiding paths up and down. When guiding the moving platform, the guiding wheel assembly is limited by the two guiding paths formed by the guiding assembly and the surface of the cylinder, so that the guiding wheel assemblies at both ends of the moving platform can only move along the guiding paths, and during the moving process, the guiding wheel assembly will not deflect relative to the guiding assembly, so that the moving platform can move horizontally smoothly along the guiding path and always keep the moving platform perpendicular to the surface to be measured.

[0060] As Figures 3-4 、 Figures 6-7 shown in the figure, the first sliding frame 10 and the second sliding frame have the same structure, both including a sliding frame body. The sliding frame body is horizontally arranged transversely. A plurality of through sliding holes 11 are opened on the sliding frame body. A sliding rod 40 that can slide in the same direction is slidably installed in the sliding holes 11 so that the height can be adaptively adjusted when the bottom of the sliding rod 40 contacts the surface of the cylinder. An ear plate 41 is installed on the upper part of the sliding rod 40. The ear plate 41 is perpendicular to the side of the sliding rod 40 facing the moving platform. When the height of the sliding rod 40 is adaptively adjusted, the ear plate 41 is adjusted together. The ear plate 41 forms an arc-shaped guide rail adapted to the arc of the cylinder surface. The arc of this arc-shaped guide rail is adapted to the arc of the cylinder surface, and the smaller the width of the sliding rod 40, the smaller the distance between the sliding rods 40, and the higher the smoothness of the arc-shaped guide rail formed by the ear plate 41. A suspension plate 42 is arranged above the ear plate 41. Both ends of the suspension plate 42 are fixedly connected to the main frame 1. An elastic member 43 is fixed between the ear plate 41 and the suspension plate 42. An acting force towards the surface of the cylinder is applied to the sliding rod 40 through the elastic member 43, so that the lower part of the sliding rod 40 can be closely attached to the surface of the cylinder, so that the arc-shaped guide rail formed by the ear plate 41 completely corresponds to the arc of the cylinder surface and forms a guiding path.

[0061] Further, a first roller 44 is installed at the bottom end of the sliding rod 40. The axle of the first roller 44 is arranged parallel to the main body of the carriage. After completing the detection of one measurement area, first adjust the guide wheel assembly so that the width of the guide wheel assembly is smaller than the width of the guide path. 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, vertically move the main frame 1. The first roller 44 can roll freely. After adjusting to a new measurement area, without readjusting the support foot structure, the negative pressure generator can be directly started to make the suction cup 9 adsorb and fix in the new measurement area, so as to conveniently complete the fixation of the main frame 1. Then readjust the guide wheel assembly so that the guide wheel assembly adapts to the width of the guide path, 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.

[0062] In this embodiment, the elastic member 43 is set 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 a plug rod fixed to the lower side of the suspension plate 42. The plug rod extends into the sleeve so that the spring always remains vertical during the compression and elongation process.

[0063] As Figure 1 、 Figure 5 shown, after the fixation of the main frame 1 is completed through the above actions, a preliminary guide path is obtained. Subsequently, the preliminary guide path needs to be locked to maintain the stability of the guide path during the guiding process. Therefore, a positioning assembly is also provided on the outer side of the main frame 1. A positioning column 12 is provided on the positioning assembly. The positioning column 12 passes through the main frame 1, the main body of the carriage and contacts the sliding rod 40. The state of the sliding rod 40 can be changed through the positioning assembly. When the positioning assembly is not locked, the sliding rod 40 can slide up and down. When the positioning assembly is locked, the sliding rod 40 cannot move.

[0064] The specific process is as follows: When the main frame 1 is not fixed on the surface of the column, there is no acting force at the bottom of the sliding rod 40. Under the action of the elastic member 43, the sliding rod 40 extends completely until the ear plate 41 contacts and limits with the main body of the carriage; during the process of fixing the main frame 1 on the surface of the column, the bottom of the sliding rod 40 gradually contacts the surface of the column (the middle sliding rod 40 contacts the surface of the column first, and the sliding rods 40 at both ends contact the surface of the column last). The sliding rod 40 moves upward along the sliding hole 11 (towards the suspension plate 42), and the elastic members 43 are compressed one by one until the bottom of the sliding rod 40 completely contacts the surface of the column and the moving amounts of the sliding rods 40 on both sides are symmetrical, then the main frame 1 is fixed.

[0065] At this time, the ear plate 41 of the first carriage 10 forms a first arc path with the column surface, and the ear plate 41 of the second carriage forms a second arc path with the column surface. 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. This width is the distance from the ear plate 41 to the column surface. Subsequently, the positioning component locks the slide bar 40, so that the first arc path and the second arc path are kept stable.

[0066] Furthermore, the positioning component 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 formed on the main frame 1, and a second through hole 14 is arranged on the carriage 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 posts 12 extend into the first through hole and the second through hole 14. An installation hole is also formed on the positioning plate 13. An adjusting threaded hole corresponding to the installation hole is arranged on the main frame 1. A positioning bolt 15 is rotatably installed in the installation hole. The positioning bolt 15 is threadedly connected with the adjusting threaded hole, and a distance is left between the positioning plate 13 and the main frame 1.

[0067] When the distance between the positioning plate 13 and the main frame 1 is large, the positioning component is not locked. At this time, the positioning posts 12 are located in the first through hole and / or the second through hole 14, and the positioning posts 12 do not contact the slide bar 40. The slide bar 40 does not receive the acting force of the positioning posts 12, so it can slide freely in the slide hole 11.

[0068] When the distance between the positioning plate 13 and the main frame 1 is small, the positioning component is locked. At this time, the positioning posts 12 pass through the first through hole and the second through hole 14 to contact the slide bar 40, so that the positioning posts 12 can apply an acting force to the slide bar 40 to complete the locking.

[0069] Furthermore, as Figure 9 shown, the guide wheel assembly includes a wheel frame 16. A lower roller assembly and an upper roller assembly which are symmetrically arranged are installed on the wheel frame 16. Among them, the lower roller assembly has at least two rolling support points on the column surface, and the upper roller assembly has at least one rolling support point on the arc-shaped guide rail formed by the ear plate 41. And the centers of symmetry of the rolling support points in the vertical direction towards the column surface are symmetrical. The distance between the lower roller assembly and the upper roller assembly can be adjusted to adapt to the widths of the first arc path and the second arc path. When the lower roller assembly is attached to the measured surface, the center of symmetry is always perpendicular to the column surface, so that the moving platform can always be perpendicular to the column surface.

[0070] Specifically, refer to Figure 8, the lower roller assembly includes a front wheel shaft 18 and a rear wheel shaft rotatably installed at the lower part of the wheel frame 16. The front wheel shaft 18 and the rear wheel shaft are arranged parallel to the moving platform. The front wheel shaft 18 and the rear wheel shaft are symmetrically arranged on both sides of the moving platform in the width direction. Second rollers 17 are respectively installed at the end parts of the front wheel shaft 18 and the rear wheel shaft. The front wheel shaft 18 and the rear wheel shaft are driven to rotate by a synchronous drive mechanism;

[0071] The upper roller assembly has at least one rolling support point on the arc-shaped guide rail formed by the ear plate 41. When there is only one rolling support point, a vertically (perpendicular to the surface of the column) height-adjustable support rod is arranged on the wheel frame 16. 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 support rod coincides with the symmetry axis of the guide wheel assembly. Thus, the third roller 21 abuts against the arc-shaped guide rail formed by the ear plate 41, so that the second roller 17 of the lower roller assembly always contacts the surface of the column.

[0072] In order to improve the stability, two rolling support points can also be set. Specifically, in this embodiment, in order to improve the stability, the upper roller assembly has two rolling support points on the arc-shaped guide rail formed by the ear plate 41, as Figure 9 shown, including a first swing rod 19 and a second swing rod 20 rotatably installed at the upper part of the wheel frame 16. When the first swing rod 19 and the second swing rod 20 rotate, they will rotate synchronously and in opposite directions. Third rollers 21 are installed at the end parts of the first swing rod 19 and the second swing rod 20. A locking assembly for locking the first swing rod 19 and the second swing rod 20 is also installed on the wheel frame 16. By adjusting the first swing rod 19 and the second swing rod 20, the third roller 21 can closely fit the arc-shaped guide rail formed by the top ear plate 41, and the second roller 17 closely fits the surface of the column. At this time, the symmetry axis of the guide wheel assembly is always perpendicular to the surface of the column, and the mounting body 2 is parallel to the symmetry axis of the guide wheel assembly, so the mounting body 2 can also always be perpendicular to the surface of the column.

[0073] The first swing rod 19 and the second swing rod 20 swing synchronously and in opposite directions through a transmission assembly. Specifically, the bottoms of the first swing rod 19 and the second swing rod 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 rod 19, and a second gear 24 is installed on the rotating shaft of the second swing rod 20. The first gear 22 meshes with the second gear 24. Therefore, when the first swing rod 19 rotates, the second swing rod 20 will rotate synchronously and in opposite directions.

[0074] Further, the locking assembly includes a locking wheel 25 mounted on the first swing rod 19. The axis of the locking wheel 25 coincides with the rotation axis of the first swing rod 19. A plurality of locking grooves are formed along the circular edge of the locking wheel 25. A locking rod 26 is disposed on one side of the locking wheel 25. The lower end of the locking rod 26 is rotatably connected to the wheel frame 16. A locking tooth is disposed on the side of the locking rod 26 adjacent to the locking wheel 25. When the locking tooth is engaged with the locking groove, the locking wheel 25 can be locked so that the locking wheel 25 cannot rotate, thereby positioning the first swing rod 19 and the second swing rod 20. A positioning tooth and a positioning rod 27 are disposed on the side of the locking rod 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. A positioning groove adapted to the positioning tooth is disposed at the upper end of the positioning rod 27. After the locking tooth is engaged with the locking groove, the positioning rod 27 is rotated so that the positioning groove cooperates with the positioning tooth. At this time, a triangular support structure is formed by the positioning rod 27, the locking rod 26, and the connection line of the rotation axes of the two rods, 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.

[0075] As Figures 8-9 shown, the synchronous drive mechanism includes a first drive motor 28 mounted on the wheel frame 16. A first synchronous pulley 33 and a second synchronous pulley are mounted on the output shaft of the first drive motor 28. A third synchronous pulley 30 is mounted on the front wheel shaft 18. A fourth synchronous pulley is mounted on the rear wheel shaft. The first synchronous pulley 33 and the third synchronous pulley 30 are connected by a first synchronous belt 31. The second synchronous pulley and the third synchronous pulley 30 are connected by a second synchronous belt 32. The first drive motor 28 is a servo motor or a stepper motor. The first drive motor 28 drives the first synchronous pulley 33 and the second synchronous pulley to rotate. The first synchronous pulley 33 and the second synchronous pulley drive the third synchronous pulley 30 and the fourth synchronous pulley to rotate through the first synchronous belt 31 and the second synchronous belt 32. The third synchronous pulley 30 and the fourth synchronous pulley drive the front wheel shaft 18 and the rear wheel shaft to rotate. The front wheel shaft 18 and the rear wheel shaft drive the second roller 17 to rotate, and the rotation of the second roller 17 can drive the mobile platform to move horizontally.

[0076] Further, cleaning rollers 29 are mounted on both the front wheel shaft 18 and the rear wheel shaft. The bristles of the cleaning rollers 29 are in contact with the surface of the column. During the process of the first drive motor 28 driving the front wheel shaft 18 and the rear wheel shaft to rotate synchronously, it can not only drive the mobile platform to move horizontally, but also drive the cleaning rollers 29 to rotate self - sufficiently to clean the surface of the column.

[0077] As Figure 6 、 Figure 8As shown in the figure, the installation main body 2 includes a middle mounting plate 201 in the middle and side mounting plates 202 on both sides. A wheel carrier 16 is installed on the side mounting plate 202, and a plurality of limit rods 39 are installed on the main frame body 1. The limit rods 39 are in contact with the side mounting plate 202 to limit the longitudinal displacement of the installation main body 2. An axially moving slide is installed on the middle mounting plate 201. The axially moving slide is arranged longitudinally along the middle mounting plate 201, and the moving seat 3 is installed on the axially moving slide.

[0078] The axially moving slide includes a base 34 fixedly connected to the middle mounting plate 201. A first fixing plate and a second fixing plate are arranged on the base 34. A guide rod 35 is fixed between the first fixing plate and the second fixing plate. The guide rod 35 and the screw rod 37 are both arranged along the length direction of the moving platform. One end of the screw rod 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 rod 37 is connected to the sliding seat through a thread. The moving seat 3 is installed on the sliding seat. The output shaft of the second driving motor 36 drives the screw rod 37 to rotate. The rotation of the screw rod 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.

[0079] A slide 4 perpendicular to the surface of the column and capable of reciprocating in the vertical direction (the height direction of the moving platform) is installed on the moving seat 3. Specifically, a vertical chute is arranged on the moving seat 3, and the slide 4 is slidably connected in the chute. A rebound hammer 5 is installed on the slide 4. A vertical driving assembly 38 is installed on the moving seat 3. The vertical driving assembly 38 drives the slide 4 to reciprocate along the chute.

[0080] The vertical driving assembly 38 can be a cylinder, a driving motor, etc. When the vertical driving assembly 38 is a cylinder, the output shaft of the cylinder is fixedly connected to the slide 4. When the output shaft of the cylinder is driven to extend, the slide 4 can be driven to move downward. When the slide 4 moves downward, the rebound hammer 5 can be driven to move downward synchronously. The output shaft of the rebound hammer 5 contacts the measuring point to complete the strength detection of the measuring point. After the detection is completed, the output shaft of the cylinder is driven to retract to drive the slide 4 to move upward, thereby completing the reset of the slide 4.

[0081] Furthermore, in order to facilitate the adaptability between the guide wheel assembly and the guide assembly, a return spring 45 is installed between the first swing rod 19 and the second swing rod 20, and a driving wheel 47 is installed on the rotation shaft of the first swing rod 19 and / or the second swing rod 20. A plurality of mounting holes are formed in the driving wheel 47, and a handle 46 is detachably installed in the mounting holes.

[0082] The working principle of the present invention is as follows: When it is necessary to detect the concrete strength of a cylindrical column, first unlock the first swing rod 19 and the second swing rod 20, and then manually rotate the handle 46 so that the first swing rod 19 and the second swing rod 20 move away from each other. At this time, the distance between the second roller 17 and the third roller 21 is relatively short, and the third roller 21 does not contact the ear plate 41. Then, lock the first swing rod 19 and the second swing rod 20 through the locking component;

[0083] Subsequently, fix the main frame 1 on the surface of the column. When fixing, keep the center line of the main frame 1 closest to the surface of the column, and the two side walls of the main frame 1 without the slide rod 40 are vertically arranged. Initially, only the bottom of the slide rod 40 in the middle is in contact with the surface of the column;

[0084] Subsequently, adjust the support feet so that the suction cups 9 on the support feet face the surface of the column, and press the main frame 1 towards the surface of the column, so that the bottoms of all the slide rods 40 can be in contact with the surface of the column. The elastic members 43 between each slide rod 40 and the suspension plate 42 are in a compressed state, and the distance between the ear plate 41 of each slide rod 40 and the surface of the column is opposite, thus forming an arc path with a constant width. Finally, make the suction cups 9 fit on the surface of the column, start the negative pressure generator to make the suction cups 9 adsorb on the surface of the column. By setting a check valve between the air outlet of the mounting rod 8 and the air extraction port of the negative pressure generator, and an electric valve at the air inlet of the mounting rod 8, after the suction cups 9 generate sufficient negative pressure, turn off the negative pressure generator and the solenoid valve at the same time, thus completing the adsorption action of the suction cups 9. When it is necessary to release the adsorption, open the solenoid valve, and the suction cups 9 are communicated with the external air pressure.

[0085] Subsequently, manually rotate the positioning bolt 15, so that the distance between the positioning plate 13 and the main frame 1 can be adjusted, and the positioning plate 13 moves towards the side close to the main frame 1. The positioning column 12 on the positioning plate 13 passes through the first through hole and the second through hole 14 and contacts the slide rod 40, so that the positioning column 12 can apply a force to the slide rod 40 to complete the locking.

[0086] After forming a stable arc path with a constant width, unlock the first swing rod 19 and the second swing rod 20. The first swing rod 19 and the second swing rod 20 approach each other under the action of the return spring 45. The third rollers 21 at the upper ends of the first swing rod 19 and the second swing rod 20 are respectively pressed on the arc-shaped guide rails formed by a plurality of ear plates 41. At this time, the second roller 17 and the surface of the column have two rolling support points, and the third roller 21 and the arc-shaped guide rail formed by the ear plate 41 have two rolling support points, and the four rolling support points are axisymmetric, and the axis of symmetry is always perpendicular to the surface of the column. The moving platform is parallel to the axis of symmetry, so the moving platform is always perpendicular to the surface of the column.

[0087] Subsequently, the first drive motor 28 drives the front wheel shaft 18 and the rear wheel shaft to rotate synchronously, thereby driving the mobile platform to move laterally, so that the mobile platform can be adjusted to different columns of the measurement area. And when the first drive motor 28 drives the front wheel shaft 18 and the rear wheel shaft to rotate synchronously, it can not only drive the mobile platform to move laterally to move the mobile platform to different columns of the point to be measured, but also drive the cleaning roller 29 to rotate self - to clean the surface of the column body, so that the surface of the point to be measured is always kept clean, avoiding the influence of sundries on the detection of the rebound instrument 5.

[0088] After completing the position adjustment of the columns to be measured in the measurement area, by adjusting the position of the moving seat 3, the moving seat 3 can be moved to the positions of different points to be measured. Specifically, the second drive motor 36 can drive the screw 37 to rotate, and the rotation of the screw 37 can drive the sliding 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 moves to different measurement points, and thus the measurement work of different points to be measured in the same column can be completed.

[0089] After determining the position of the point to be measured, the rebound detection action of the point to be measured is completed by adjusting the position of the sliding table 4. Specifically, through the vertical drive assembly 38, that is, the output shaft of the cylinder or the electric cylinder extends, thereby driving the sliding table 4 to move downward along the sliding groove. At this time, the rebound instrument 5 on the sliding table 4 moves vertically towards the surface of the column body, the output rod of the rebound instrument 5 abuts against the surface of the column body, and then is fully compressed to complete the measurement action of the rebound instrument 5. Subsequently, the output shaft of the cylinder or the electric cylinder retracts, and the rebound instrument 5 resets, thus completing one measurement.

[0090] Repeating the above - mentioned main frame 1 positioning process, the position adjustment of the columns to be measured in the measurement area of the mobile platform, the position adjustment of the measurement points to be measured in the measurement area of the moving seat 3, the measurement action of the rebound instrument 5, and the reset action of the rebound instrument 5 can complete the concrete strength detection of the measurement area. And it can not only be applicable to the concrete strength detection of rectangular column bodies, but also be able to conduct the concrete strength detection of cylindrical columns. During the detection process, the rebound instrument 5 can always be kept vertically facing the point to be measured, improving the detection efficiency and quality.

[0091] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention; without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A device for detecting the strength of concrete, characterized in that, It includes a main frame body (1) fixed to the surface of the column to be measured. A guiding component for forming an equal-width guiding path in cooperation with the surface of the column to be measured is arranged on the main frame body (1). The guiding component includes sliding frames arranged on two opposite sides of the main frame body (1). A plurality of sliding rods (40) are slidably installed on the sliding frames. Elastic members (43) are arranged on the sliding rods (40) in the sliding path direction. The elastic members (43) are installed on the main frame body (1). Ear plates (41) are arranged on the sliding rods (40). The bottom of the sliding rods (40) is in contact with the surface of the column to be measured. The ear plates (41) form an arc-shaped guide rail adapted to the radian of the surface of the column to be measured. The ear plates (41) and the surface of the column to be measured form an equal-width guiding path. A positioning component for locking the sliding rods (40) is arranged on the main frame body (1). A moving platform is installed between the guiding components. The moving platform reciprocates along the equal-width guiding path. Guide wheel components are symmetrically installed at both ends of the moving platform. The guide wheel components have at least three rolling support points on the equal-width guiding path, and the rolling support points are symmetrically arranged along the central axis in the direction perpendicular to the surface of the column to be measured. The moving 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 sliding table (4) perpendicular to the surface of the column to be measured is slidably installed on the moving seat (3). The sliding table (4) can reciprocate in the direction perpendicular to the surface of the column to be measured. A rebound instrument (5) is installed on the sliding table (4).

2. The concrete strength detection device according to claim 1, characterized in that, A plurality of supporting feet are arranged outside the main frame body (1). The supporting feet include a fixed end (6) and a movable end (7) capable of adjusting the angle. 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 guiding components. The limiting rod (39) is used to limit the moving platform from deviating towards one of the guiding components.

4. A concrete strength detection device according to claim 3, characterized in that, The positioning component includes a positioning plate (13) installed on the main frame body (1). The distance between the positioning plate (13) and the main frame body (1) can be adjusted. A positioning column (12) is arranged on the positioning plate (13). The positioning column (12) penetrates the main frame body (1) and is arranged towards the sliding rod (40) of the sliding frame. When the positioning column (12) contacts the sliding rod (40), a locking action is performed. When the positioning column (12) does not contact the sliding rod (40), the sliding rod (40) can reciprocate.

5. The concrete strength detection device according to claim 1, wherein, The guide wheel component includes a wheel frame (16). A lower roller component for fitting the surface of the column to be measured and an upper roller component for fitting the ear plate are installed on the wheel frame (16). The distance between the lower roller component and the upper roller component can be adjusted to adapt to the width of the guiding path of the guiding component. The lower roller component has at least two rolling support points on the surface of the column to be measured.

6. The concrete strength detection device according to claim 5, characterized in that, The lower roller assembly includes lower rollers driven by a motor to rotate, and the lower rollers are symmetrically arranged on both sides of the moving platform in the width direction. When the lower rollers press against the surface of the to-be-tested column, the moving platform is perpendicular to the surface of the to-be-tested column, and a cleaning roller (29) is installed on the axle of the lower roller.

7. An apparatus for detecting the strength of concrete according to claim 5, characterized in that, The upper roller assembly has two rolling support points on the guiding assembly, and includes a first swing rod (19) and a second swing rod (20) that rotate synchronously and in opposite directions. Upper rollers are installed at the ends of the first swing rod (19) and the second swing rod (20). A locking assembly is arranged on one side of the upper roller assembly to lock and position the first swing rod (19) and the second swing rod (20).

8. A concrete strength detection device according to claim 7, characterized in that, The locking assembly includes a locking wheel (25) installed on the first swing rod (19). The locking wheel (25) shares a rotating shaft with the first swing rod (19). A locking rod (26) is arranged on one side of the locking wheel (25). The lower end of the locking rod (26) is rotatably connected to the wheel carrier (16). When the locking rod (26) rotates, it approaches or moves away from the locking wheel (25). Locking teeth are arranged on the locking rod (26). A positioning rod (27) is arranged on one side of the locking rod (26). When the positioning rod (27) supports the locking rod (26), it can prevent the locking rod (26) from separating from the locking wheel (25).

9. The concrete strength detection device according to claim 5, characterized in that, The upper roller assembly has one rolling support point on the guiding 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 an upper roller is installed at the top of the support rod.

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

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