A concrete rebound tester for supervision

Abstract

The present invention relates to the technical field of concrete strength detection, and in particular to a concrete rebound tester for supervision, comprising a rebound tester body, wherein the rebound tester body has a rebound tester shell, wherein the rebound tester shell has a center guide rod and a spring rod sleeved on the center guide rod, and further comprises a positioning frame, wherein the positioning frame comprises: a horizontal positioning component, located inside the positioning frame, comprising a limit ring fixed in the positioning frame, the inner diameter of which is matched with the outer diameter of the rebound tester body, the limit ring is coaxially arranged with the rebound tester body and sleeved on the outer periphery of the rebound tester body, and the rebound tester body is guided and installed on the limit ring along the horizontal direction; a positioning foot, located outside the positioning frame, the positioning foot is used to contact the surface of the material to be tested when the rebound tester is in use; the number of the positioning feet is multiple, and the ends of the multiple positioning feet away from the positioning frame are flush with each other; the present invention solves the technical problem in the prior art that the rebound tester cannot ensure verticality, resulting in inaccurate measurement results.

Description

Technical Field

[0001] The invention relates to the technical field of concrete strength detection, and in particular to a concrete rebound tester for supervision. Background Art

[0002] The concrete rebound tester is a testing device used to test the strength of concrete. The specific principle is to use a spring to drive a hammer to hit the concrete in the measurement area. The concrete deforms and consumes energy, and the rebound distance of the hammer represents the energy loss. Concrete of different strengths will have different deformations, different energy consumption, and different rebound distances when hit by a hammer, thus achieving the function of strength measurement.

[0003] For example, a Chinese patent application document with application publication number CN114264563A discloses a concrete rebound tester, including a rebound tester body, which includes a shell, a striking rod, a central guide rod, a striking hammer and a striking tension spring. The striking rod is inserted from the front end of the shell and sleeved on the central guide rod, and is provided with a blind hole and a buffer spring; the striking tension spring sleeves on the central guide rod and connects the striking rod and the striking hammer; one end of the striking hammer protrudes from the shaft body, and the end of the shaft body is provided with a groove structure that is mortised with the firing mechanism; the front end of the shell is provided with a convex shaft that cooperates with the firing structure. When in use, the striking rod is manually pressed in, the striking hammer is pushed through the central guide rod and the striking tension spring is stretched, and the firing structure is triggered when stretched to a certain distance, and the spring hammer strikes the striking rod under the tension of the striking tension spring and transmits the force to the surface of the material to be tested, and the rebound force generated on the surface is transmitted to the striking hammer through the striking rod, thereby driving the pointer to display the value.

[0004] However, the above device still has certain shortcomings when in use: 1. The above device uses manual control of the hammer direction during use, and cannot ensure the verticality between the impact rod and the measuring surface during measurement, which can easily lead to inaccurate measurement results; 2. It is not convenient to apply pressure to the equipment when testing high-level building concrete, causing inconvenience in use. Summary of the invention

[0005] The invention provides a concrete rebound test hammer for supervision, so as to solve the technical problem that the rebound test hammer in the prior art cannot ensure verticality, resulting in inaccurate measurement results.

[0006] In order to solve the above problems, the concrete rebound test hammer for supervision provided by the present invention adopts the following technical solutions:

[0007] A concrete rebound test hammer for supervision includes a rebound test hammer body, the rebound test hammer body has a rebound test hammer shell, the rebound test hammer shell has a central guide rod and a rebound rod sleeved on the central guide rod, and also includes a positioning frame, the positioning frame includes:

[0008] The horizontal positioning assembly is located inside the positioning frame, and includes a limit ring fixed inside the positioning frame, the inner diameter of which matches the outer diameter of the rebound hammer body. The limit ring is coaxially arranged with the rebound hammer body and sleeved on the outer periphery of the rebound hammer body. The rebound hammer body is guided and installed on the limit ring along the horizontal direction, so that the rebound hammer body can reciprocate in the positioning frame along the horizontal direction.

[0009] The positioning foot is located outside the positioning frame and is used to contact the surface of the material to be tested when the rebound tester is in use;

[0010] There are multiple positioning legs, and the ends of the multiple positioning legs away from the positioning frame are flush with each other, so that the ends of each positioning leg can stably abut against the surface of the material to be tested.

[0011] Its beneficial effects are as follows: on the basis of the rebound tester body, by adding a positioning frame, the horizontal positioning component inside the positioning frame is used to enable the rebound tester body to move back and forth in the positioning frame along the horizontal direction, thereby ensuring the horizontality of the rebound tester body, and the positioning feet outside the positioning frame enable the positioning frame to stably abut against the surface of the material to be tested, thereby ensuring the horizontality of the positioning frame, thereby fully ensuring the verticality between the impact rod of the rebound tester body and the measuring surface, and further ensuring the accuracy of the measurement result.

[0012] Furthermore, the positioning frame is a rectangular frame, which includes two square frames arranged in parallel and four long side rods connecting the two square frames, and a plurality of the positioning feet are arranged on the outer side of one of the square frames.

[0013] Furthermore, the square frame for placing the positioning legs is the first square frame, and the other is the second square frame. The first square frame is fixed with a plurality of inclined rods extending obliquely toward the central axis of the rebound tester body, and the ends of each inclined rod are connected in sequence through the limiting ring.

[0014] Further, both ends of each of the long side rods are hinged to the first frame and the second frame respectively, wherein the bottom of the first frame has a support handle for supporting the side of the surface of the material to be tested, and the bottom of the second frame has a traction handle, which is used to rotate each of the long side rods downward relative to the first frame when downward force is applied;

[0015] The beneficial effect is that the setting of the support handle and the traction handle facilitates the user to exert downward force, and can drive the rebound tester body to move horizontally. It does not need to be kept at the same height as the rebound tester body, and can better adapt to high-position measurement scenarios.

[0016] The long side rod is in transmission connection with the rebound tester body through a transmission structure, so that when the long side rod rotates downward, the rebound tester body is driven to move toward the surface of the material to be tested.

[0017] Furthermore, the four long side rods are divided into two groups, and the transmission structure includes two vertical plates arranged in parallel, each vertical plate is hinged with a long side rod at both ends, and the two long side rods hinged to one vertical plate constitute a group of long side rods. The transmission structure also includes a gear transmission assembly located between each vertical plate and the rebound tester body.

[0018] Furthermore, each gear transmission assembly includes a slider slidably mounted on a vertical plate, the vertical plate also having a first rack extending up and down, a fixed plate on the rebound tester body, a second rack extending horizontally on the fixed plate, a connecting shaft passing through the slider, the connecting shaft having a small gear meshing with the first rack and a large gear meshing with the second rack, so as to drive the rebound tester body to move through gear transmission.

[0019] The beneficial effect is that the gear transmission assembly is adopted, which has the advantages of stable meshing and stable transmission.

[0020] Furthermore, the fixing plate is provided with a horizontally extending dovetail groove, and the connecting shaft is provided with a dovetail block inserted into the dovetail groove to improve the stability of the gear transmission assembly.

[0021] The beneficial effect is that the dovetail groove and the dovetail block have a large fitting area, which can fully ensure the movement stability of the gear transmission assembly.

[0022] Furthermore, a reset spring is installed between the limit ring and the rebound tester body, so as to drive the rebound tester body to reset when the traction handle is released.

[0023] Furthermore, a locking assembly is provided between one of the inclined rods and the rebound hammer body, so as to lock the limit-position rebound hammer body when the rebound hammer body moves to a set position.

[0024] The beneficial effect is that the locking assembly is arranged to temporarily maintain the posture of the rebound tester body when reading the test data, so as to prevent the tester from pressing the rebound tester loosely and causing data deviation.

[0025] The beneficial effects of the concrete rebound test hammer for supervision provided by the present invention are:

[0026] 1. On the basis of the rebound hammer body, a positioning frame is added. The horizontal positioning component inside the positioning frame is used to enable the rebound hammer body to move back and forth in the positioning frame in the horizontal direction, thereby ensuring the horizontality of the rebound hammer body. The positioning feet outside the positioning frame enable the positioning frame to stably abut against the surface of the material to be tested, thereby ensuring the horizontality of the positioning frame, thereby fully ensuring the verticality between the impact rod of the rebound hammer body and the measuring surface, thereby ensuring the accuracy of the measurement result;

[0027] 2. The setting of the support handle and the traction handle makes it convenient for the user to apply downward force to drive the rebound hammer body to move horizontally. It does not need to be kept at the same height as the rebound hammer body, which can better adapt to high-level measurement scenarios;

[0028] 3. The gear transmission assembly is adopted, which has the advantages of stable meshing and stable transmission;

[0029] 4. The dovetail groove and dovetail block have a large fitting area, which can fully ensure the movement stability of the gear transmission assembly;

[0030] 5. Set the locking component to temporarily maintain the posture of the rebound tester body when reading the test data to prevent the tester from loosening the rebound tester and causing data deviation;

[0031] In summary, through the above-mentioned settings, the present invention completes the improvement and upgrading of the existing concrete rebound test hammer, and effectively solves the technical problem in the prior art that the rebound test hammer cannot ensure verticality, resulting in inaccurate measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0033] Figure 1 A three-dimensional schematic diagram of the concrete rebound test hammer for supervision provided by the present invention Figure 1 ;

[0034] Figure 2 A three-dimensional schematic diagram of the concrete rebound test hammer for supervision provided by the present invention Figure 2 ;

[0035] Figure 3 for Figure 1 The schematic diagram of the structure of the rebound tester body is shown;

[0036] Figure 4 for Figure 1 Schematic diagram of the vertical plate structure shown;

[0037] Figure 5 for Figure 1 Schematic diagram of the coordination between the middle gear transmission assembly and the vertical plate;

[0038] Figure 6 for Figure 1 Schematic diagram of the cooperation between the middle limit rod and the retaining ring.

[0039] Description of reference numerals:

[0040] 1. Rebound tester body; 11. Rebound tester housing; 12. Rebound rod;

[0041] 2. Positioning frame; 21. First square frame; 22. Second square frame; 23. Long side rod; 24. Positioning support foot; 25. Support handle; 26. Auxiliary support foot; 27. Pull handle;

[0042] 3. Horizontal positioning assembly; 31. Limiting ring; 32. Diagonal rod;

[0043] 4. Reset assembly; 41. Fixing ring; 42. Guide rod; 43. Reset spring;

[0044] 5. Transmission structure; 51. Vertical plate; 52. First rack; 53. Guide groove; 54. Slider; 55. Fixed plate; 56. Second rack; 57. Dovetail groove; 58. Dovetail block;

[0045] 59, gear transmission assembly; 591, connecting shaft; 592, small gear; 593, large gear;

[0046] 6. Locking assembly; 61. Snap ring; 62. Limit rod; 63. Baffle. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0048] The main idea of ​​the present invention is to limit the movement of the rebound tester body 1 in the horizontal direction by setting a horizontal positioning component 3 in the positioning frame 2, thereby ensuring the horizontality of the rebound tester body 1, and using positioning legs 24 and support handles 25 to make the positioning frame 2 stably abut against the surface to be measured, thereby ensuring the horizontality of the positioning frame 2, and then the impact rod 12 can always maintain verticality during the movement, thereby solving the problem of inaccurate data caused by the inability to maintain the verticality of the impact rod 12 in the prior art.

[0049] After introducing the basic principle of the present invention, various non-limiting embodiments of the present invention are described in detail below. The number of any element in the drawings is for illustration and not for limitation, and any naming is only for distinction and does not have any limiting meaning.

[0050] The principle and spirit of the present invention are explained in detail below with reference to several representative embodiments of the present invention.

[0051] Embodiment 1 of the concrete rebound test hammer for supervision provided by the present invention:

[0052] like Figures 1 to 6As shown, the concrete rebound test hammer for supervision is mainly composed of a rebound test hammer body 1 and a positioning frame 2, wherein the rebound test hammer body 1 is used to realize the rebound action on the surface of the material to be tested and display the rebound value, and the positioning frame 2 is used to maintain the verticality between the rebound test hammer body 1 and the surface of the material to be tested and provide thrust for the rebound test hammer body 1 to realize the rebound action.

[0053] The positioning frame 2 is first introduced below. The positioning frame 2 includes a horizontal positioning component 3. The horizontal positioning component 3 includes a limit ring 31 fixed in the positioning frame 2, the inner diameter of which is adapted to the outer diameter of the rebound tester body 1. The limit ring 31 is coaxially arranged with the rebound tester body 1 and sleeved on the outer periphery of the rebound tester body 1, and four through holes are provided in the axial direction; the horizontal positioning component 3 also includes a plurality of inclined rods 32 fixed in the middle of the first frame 21 and extending obliquely toward the central axis of the rebound tester body 1, and the ends of each inclined rod 32 are connected in sequence through the limit ring 31.

[0054] The positioning frame 2 is a rectangular frame, including a first frame 21 and a second frame 22 arranged in parallel. The first frame 21 and the second frame 22 are hinged by four long side rods 23. The first frame 21 is provided with four cylindrical positioning feet 24 facing the left side, which are used to abut against the surface of the material to be tested. At the same time, a supporting handle 25 is provided on one side of the first frame 21, and two auxiliary feet 26 are provided on the left side of the supporting handle 25. The auxiliary feet 26 are flush with the left end of the positioning foot 24. The second frame 22 has a traction handle 27 on the same side of the supporting handle 25, which is used for the operator to apply traction to the positioning frame 2.

[0055] A transmission structure 5 is provided between the positioning frame 2 and the rebound tester body 1, and the transmission structure 5 includes two parallel vertical plates 51. The two ends of each vertical plate 51 are respectively hinged to a long side rod 23. The left side of the vertical plate 51 has a first rack 52 and a guide groove 53 extending up and down, and a slider 54 is slidably installed in the guide groove 53.

[0056] In addition, the transmission structure 5 also includes a fixed plate 55 symmetrically arranged along the curved surface outside the rebound tester body 1. The fixed plate 55 is a rectangular block. Each fixed plate 55 has a horizontally extending dovetail groove 57 and a second rack 56. A dovetail block 58 is slidably installed in the dovetail groove 57.

[0057] Finally, the transmission structure 5 includes a gear transmission assembly 59 located between each vertical plate 51 and the rebound tester body 1. The gear transmission assembly 59 includes a connecting shaft 591. The connecting shaft 591 has a small gear 592 meshing with the first rack 52 and a large gear 593 meshing with the second rack 56, so as to drive the rebound tester body 1 to move through gear transmission. The connecting shaft 591 is connected to the slider 54 at one end of the small gear 592 and to the dovetail block 58 at the other end, so as to improve the stability of the transmission structure 5 through the sliding connection.

[0058] The rebound tester body 1 is introduced below. The rebound tester body 1 includes a rebound rod 12 and other internal structures (not shown in the figure) inside, and a reset assembly 4 outside the rebound tester body 1. The reset assembly 4 includes a fixed ring 41 extending circumferentially along the outer peripheral curved surface of the rebound tester body 1, and four cylindrical guide rods 42 are arranged in parallel along the axial direction of the rebound tester body 1 on the left side of the fixed ring 41. One end of the guide rod 42 is fixedly connected to the fixed ring 41, and the other end passes through the through hole provided on the limit ring 31. A reset spring 43 is sleeved on the guide rod 42. One end of the reset spring 43 pushes the fixed ring 41, and the other end pushes the limit ring 31. When in use, the rebound tester is reset by the pushing cooperation among the reset spring 43, the limit ring 31 and the fixed ring 41.

[0059] In addition, a locking assembly 6 is provided between the positioning frame 2 and the rebound tester body 1. The locking assembly 6 includes a snap ring 61 provided at the left end of the rebound tester body 1 and extending circumferentially along the outer peripheral curved surface. The locking assembly 6 also includes a limit rod 62 provided in the middle of one of the inclined rods 32. The limit rod 62 has a through hole in the middle. The inclined rod 32 has a rotating shaft at the vertical center of the rod, so that the limit rod 62 can rotate around the internal rotating shaft of the inclined rod 32. Baffles 63 are provided on both sides of the limit rod 62. The baffles 63 and the inclined rod 32 are fixedly connected to limit the rotation range of the limit rod 62. The baffles 63 are made of magnet material and have an adsorption effect on the limit rod 62. When the rebound tester body 1 is moved to a certain position, the limit rod 62 can be rotated toward one end of the rebound tester body 1 to the upper side of the snap ring 61, and the locking is achieved by pushing the snap ring 61.

[0060] The working principle of the concrete rebound test hammer for supervision provided by the present invention is:

[0061] When in use, the operator holds the support handle 25 with his left hand and the traction handle 27 with his right hand, and fits the positioning leg 24 and the auxiliary leg 26 to the surface of the material to be tested. At the same time, the left hand presses the support handle 25 without moving, and the right hand applies traction to the traction handle 27. At this time, the parallelogram structure composed of the first frame 21, the second frame 22, the vertical plate 51 and the long side rod 23 moves in the direction of the traction force. When the vertical plate 51 moves downward, the small gear 592 is driven by the first rack 52 to rotate clockwise, and the small gear 592 drives the large gear 593 to rotate clockwise through the connecting shaft 591. The large gear 593 is engaged with the second rack 56 to drive the fixed plate 55 to move along the axis of the rebound tester body 1 toward the surface of the material to be tested, and then drives the rebound tester body 1 to move toward the surface of the material to be tested, thereby driving the impact rod 12 to push the surface of the material to be tested. The impact rod 12 pushes the internal structure of the rebound tester (not shown in the figure) to realize the impact detection on the surface of the material to be tested.

[0062] When the rebound tester is in use, the positioning legs 24 and the auxiliary legs 26 fit against the surface of the material to be tested, so that the positioning frame 2 maintains a vertical relationship with the surface of the material to be tested. At the same time, during the movement of the rebound tester body 1, the limiting ring 31 limits the rebound tester shell 11 to move in the horizontal direction, so that the impact rod 12 can always remain perpendicular to the surface to be tested.

[0063] When reading the indication of the rebound hammer, the rebound hammer needs to be kept in a pressed state. By pushing the limit rod 62 inward and pushing the clamp ring 61, a locking function can be achieved, which can prevent the operator from loosening the rebound hammer pointer during the pressing process, causing inaccurate readings.

[0064] Embodiment 2 of the concrete rebound test hammer for supervision provided by the present invention:

[0065] The main difference between it and Example 1 is:

[0066] In Example 1, the guide rod 42 is fixed on the fixing ring 41 and passes through the limiting ring 31 to achieve a guiding function.

[0067] In this embodiment, the guide rod 42 can be fixed on the limiting ring 31 and pass through the fixing ring 41 to achieve guidance.

[0068] Embodiment 3 of the concrete rebound test hammer for supervision provided by the present invention:

[0069] The main difference between it and Example 1 is:

[0070] In Example 1, the sliding grooves on the fixed plate 55 and the vertical plate 51 are dovetail grooves 57 and guide grooves 53 .

[0071] In this embodiment, the sliding grooves on the fixed plate 55 and the vertical plate 51 can be configured as square grooves or arc grooves, etc., and are not limited to a certain fixed shape.

[0072] Embodiment 4 of the concrete rebound test hammer for supervision provided by the present invention:

[0073] The main difference between it and Example 1 is:

[0074] In Embodiment 1, the traction handle 27 and the support handle 25 are columnar structures, and are located in the first frame 21 and the second frame 22 respectively.

[0075] In this embodiment, the handle structure can be set to a rod shape, a plate shape, etc., which is convenient for the operator to apply force during use and is not limited to a fixed shape; the handle position can be set at other positions of the first frame 21 and the second frame 22.

[0076] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "horizontal", "top", "bottom", "inside", "outside" and the like, which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the devices or elements involved must have the specific orientation, be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the present invention.

[0077] In addition, in the description of this specification, “plurality” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

Claims

1. A concrete rebound test hammer for supervision, comprising a rebound test hammer body, wherein the rebound test hammer body has a rebound test hammer shell, wherein the rebound test hammer shell has a central guide rod and a striking rod sleeved on the central guide rod, wherein: It also includes a positioning frame, which includes: The horizontal positioning assembly is located inside the positioning frame, and includes a limit ring fixed inside the positioning frame, the inner diameter of which matches the outer diameter of the rebound hammer body. The limit ring is coaxially arranged with the rebound hammer body and sleeved on the outer periphery of the rebound hammer body. The rebound hammer body is guided and installed on the limit ring along the horizontal direction, so that the rebound hammer body can reciprocate in the positioning frame along the horizontal direction. The positioning foot is located outside the positioning frame and is used to contact the surface of the material to be tested when the rebound tester is in use; There are multiple positioning legs, and the ends of the multiple positioning legs away from the positioning frame are flush with each other, so that the ends of each positioning leg can stably abut against the surface of the material to be tested; The positioning frame is a rectangular frame, which includes two parallel arranged square frames and four long side rods connecting the two square frames, and a plurality of positioning feet are arranged on the outer side of one of the square frames; The square frame for placing the positioning legs is the first square frame, and the other is the second square frame. The first frame is fixed with a plurality of inclined rods extending obliquely toward the central axis of the rebound tester body, and the ends of the inclined rods are connected in sequence through the limiting rings. Both ends of each of the long side rods are hinged to the first frame and the second frame respectively, wherein the bottom of the first frame has a support handle for supporting the side of the surface of the material to be tested, and the bottom of the second frame has a traction handle, which is used to rotate each of the long side rods downward relative to the first frame when downward force is applied; The long side rod is connected to the rebound test body through a transmission structure, so that when the long side rod rotates downward, the rebound test body is driven to move toward the surface of the material to be tested; The four long side rods are divided into two groups. The transmission structure includes two vertical plates arranged in parallel. A long side rod is hinged at both ends of each vertical plate. The two long side rods hinged to one vertical plate constitute a group of long side rods. The transmission structure also includes a gear transmission assembly located between each vertical plate and the rebound tester body.

2. The concrete rebound test hammer for supervision according to claim 1, characterized in that: Each gear transmission assembly includes a slider slidably mounted on a vertical plate, the vertical plate also has a first rack extending up and down, the rebound tester body has a fixed plate, the fixed plate has a second rack extending horizontally, the slider is penetrated by a connecting shaft, the connecting shaft has a small gear meshing with the first rack and a large gear meshing with the second rack, so as to drive the rebound tester body to move through gear transmission.

3. The concrete rebound test hammer for supervision according to claim 2, characterized in that: The fixing plate is provided with a horizontally extending dovetail groove, and the connecting shaft is provided with a dovetail block inserted into the dovetail groove to improve the stability of the gear transmission assembly.

4. The concrete rebound test hammer for supervision according to any one of claims 1 to 3, characterized in that: A reset spring is installed between the limit ring and the rebound tester body to drive the rebound tester body to reset when the traction handle is released.

5. The concrete rebound test hammer for supervision according to any one of claims 1 to 3, characterized in that: A locking assembly is also provided between one of the inclined rods and the rebound hammer body, so as to lock the limit position rebound hammer body when the rebound hammer body moves to a set position.

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