A concrete performance testing device

Abstract

The present invention provides a concrete performance detection device, comprising a rebound hammer body and a marking unit, wherein the rebound hammer body is used to detect the performance of a concrete sampling surface, and the rebound hammer body has a striking rod, and the striking rod can reach the sampling surface; the marking unit is arranged at one end of the rebound hammer body, and the marking unit is used to leave a plurality of marking lines on the sampling surface each time the rebound hammer body detects the performance of the concrete sampling surface; when the striking rod is perpendicular to the sampling surface, the lengths of the plurality of marking lines are the same, and when the striking rod is inclined to the sampling surface, the lengths of the plurality of marking lines are different, and the difference in the lengths of the plurality of marking lines is used to reflect whether the detection is performed vertically and to identify whether the detection is effective.

Description

Technical Field

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

[0002] Performance testing of concrete is an indispensable component in construction projects. Rebound hammers are often used for compressive strength testing. Before testing, multiple measuring areas need to be outlined with a pen on the surface of the concrete sample to be tested. The testing personnel make the impact rod at the front end of the rebound hammer touch the surface of the measuring area, and press the rebound hammer vertically down multiple times to make the impact rod vertically impact multiple measuring areas on the surface of the concrete sample. Samples are taken from each measuring area, and the rebound amount of each sample is recorded. The compressive strength of the concrete test is calculated. In this process, whether the impact rod vertically hits the surface of the concrete sample is an important factor affecting the validity of the test results.

[0003] The article "Real-time Monitoring System for Concrete Rebound Including Management Integrated Device" in the 36th volume of the fourth issue of the Chinese journal "Zhejiang Architecture" in 2019 mentioned that conventional concrete testing rebound hammers are greatly influenced by human factors. After the test is completed, there is no reliable evidence to confirm whether the impact rod hits the concrete specimen surface vertically during the test, which may affect the test results and create hidden dangers to subsequent safety.

[0004] The information disclosed in the background technology section of this application is only intended to deepen the understanding of the general background technology of this application, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0005] In view of the deficiencies in the prior art, a concrete performance testing device is provided, which can leave a testing mark while testing and can reflect whether the vertical testing is compliant and effectively reflect whether the test result is valid.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A concrete performance testing device comprises a rebound test body and a marking unit, wherein a rebound rod is slidably provided at one end of the rebound test body, and an end of the rebound rod away from the rebound test body is a detection end, the detection end can reach a concrete sampling surface to be tested, and the rebound test body can slide close to or away from the detection end;

[0008] The marking unit is arranged at one end of the rebound test hammer body close to the detection end, and the marking unit moves with the rebound test hammer body, and is used to leave a plurality of marking lines on the sampling surface each time the rebound test hammer body detects the performance of the concrete sampling surface;

[0009] When the impact rod hits the concrete sampling surface, it has a first state and a second state. In the first state, the axis of the impact rod is perpendicular to the sampling surface, and in the second state, the axis of the impact rod is inclined to the sampling surface. When the impact rod hits in the first state, the lengths of the multiple marking lines left by the marking unit are the same, and when the impact rod hits in the second state, the lengths of the multiple marking lines left by the marking unit are different.

[0010] Optionally, the marking unit includes a first bottom plate and a transmission assembly, the first bottom plate is slidably disposed on the impact rod along the extension direction of the impact rod, the first bottom plate is connected to the rebound tester body, and moves with the rebound tester body;

[0011] A plurality of marking members are hinged on one surface of the first bottom plate close to the detection end, and the plurality of marking members are evenly distributed along the circumferential direction, one end of the plurality of marking members is hinged to the edge of the first bottom plate through a hinge shaft, and the other end is freely suspended, the axis of the hinge shaft is perpendicular to the length direction of the marking member, and the suspended end of the marking member is the marking end;

[0012] The transmission assembly is used to rotate the plurality of marking members.

[0013] Optionally, the transmission assembly includes a second bottom plate, a plurality of hinged rods and a plurality of hinged members, the second bottom plate is slidably arranged on the impact rod along the extension direction of the impact rod, and the second bottom plate is arranged between the first bottom plate and the rebound tester body;

[0014] The plurality of hinges correspond to the plurality of marking members one by one, and the hinges are slidably arranged on the marking members along the length direction of the marking members; the plurality of hinge rods correspond to the plurality of hinges one by one, and one end of each hinge rod is hinged to the corresponding hinge member, and the other end is connected to the second bottom plate;

[0015] A first elastic member is provided on a side of the first base plate away from the detection end, one end of the first elastic member is connected to the first base plate, and the other end is a freely cantilevered end; a second elastic member is provided on a side of the second base plate away from the detection end, one end of the second elastic member is connected to the second base plate, and the other end is connected to the rebound tester body, and the second elastic member moves with the rebound tester body.

[0016] Optionally, the marking unit further comprises a shell, the shell is hollow and slidably arranged on the impact rod, the first bottom plate and the transmission assembly are both arranged inside the shell, a through hole is arranged on the end surface of the shell close to the detection end, the marking end of the marking member contacts the sampling surface through the through hole, the diameter of the through hole is smaller than the outer diameter of the first bottom plate, and the initial state of the first bottom plate is to abut against the inner side wall of the shell close to the detection end;

[0017] The outer side surface of the shell away from the detection end is connected to the rebound tester body, and the shell moves with the rebound tester body. One end of the second elastic member away from the second bottom plate is connected to the inner side wall of the shell away from the detection end, and the second elastic member is indirectly connected to the rebound tester body.

[0018] Optionally, a magnet is provided inside the contact position between the first bottom plate and the impact rod, and a magnet is provided on the impact rod, and the magnet on the first bottom plate and the magnet on the impact rod attract each other.

[0019] Optionally, a plurality of limiting grooves are provided on one side of the first bottom plate close to the detection end, the plurality of limiting grooves are evenly distributed along the circumferential direction and extend along the radial direction, and the limiting grooves correspond to the positions of the marking members one by one.

[0020] Optionally, the marking element is a marking pen.

[0021] Optionally, the marking member is a carbon rod.

[0022] Optionally, the marking element is made of fluorescent material for observation at night.

[0023] Optionally, the rebound tester body has a detection unit, and the detection unit is used to impact the impact rod and detect the rebound value of the concrete sampling surface after the impact.

[0024] The beneficial effects of the present invention are as follows: a concrete performance detection device of the present invention is provided with a marking unit that moves with the rebound hammer body, and each time the rebound hammer body detects the concrete compressive strength, the marking unit can leave a plurality of marking lines on the sampling surface, and when the detection is perpendicular to the sampling surface, the lengths of the plurality of marking lines left by the marking unit are the same; when the sampling is not perpendicular to the sampling surface, the lengths of the plurality of marking lines left by the marking unit are different, and whether the detection is perpendicular can be reflected according to the difference in the lengths of the marking lines, and whether the detection error is within the allowable effective range, so as to check whether the impact detection is effective.

[0025] At the same time, leaving a mark line during the test also makes it easier to identify and record whether each test area has been sampled and tested, so that it is not easy to miss a test in multiple sampling tests. In addition, the safety supervisor of the later project can know whether the previous test of concrete compressive strength was conducted vertically based on the mark line left by the marking unit, and judge whether the test meets the specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of a concrete performance testing device of the present invention;

[0027] Figure 2This is a schematic diagram of the explosion structure of a concrete performance detection device of the present invention;

[0028] Figure 3 It is a side view of a concrete performance detection device of the present invention;

[0029] Figure 4 for Figure 3 Sectional view at AA in the middle;

[0030] Figure 5 for Figure 4 The enlarged image of point a in the middle (initial state);

[0031] Figure 6 for Figure 4 The enlarged view of point a in the middle (marker is extended);

[0032] Figure 7 for Figure 4 The enlarged view of point a in the middle (the state where the marking piece contacts the sampling surface);

[0033] Figure 8 for Figure 4 The enlarged view of point a in the middle (marker is retracted);

[0034] Fig. 9 for Figure 4 An enlarged view of point a (the state where the housing reaches the first bottom plate);

[0035] Fig.10 It is a schematic diagram of the connection structure between the first base plate and the marking member of the present invention.

[0036] in:

[0037] 100, rebound tester body; 110, rebound rod; 111, detection end;

[0038] 200, marking unit;

[0039] 300, first bottom plate; 310, marking member; 301, limiting groove;

[0040] 400, second bottom plate; 410, hinge rod; 420, hinge member; 430, first elastic member; 440, second elastic member; 450, shell. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0042] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0043] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] refer to Figures 1 to 10 The concrete performance detection device of the present invention comprises a rebound test body 100 and a marking unit 200. A rebound rod 110 is slidably provided at one end of the rebound test body 100. The end of the rebound rod 110 away from the rebound test body 100 is a detection end 111. The detection end 111 can reach a concrete sampling surface to be detected. The rebound test body 100 can slide close to or away from the detection end 111 to detect the performance of the concrete sampling surface.

[0045] The marking unit 200 is disposed at one end of the rebound test hammer body 100 close to the detection end 111. The marking unit 200 moves with the rebound test hammer body 100 toward or away from the detection end 111, and is used to leave a plurality of marking lines on the sampling surface each time the rebound test hammer body 100 detects the performance of the concrete sampling surface.

[0046] When the rebound tester body 100 detects the sampling surface, the impact rod 110 abuts against the concrete sampling surface in the first state or the second state. In the first state, the axis of the impact rod 110 is perpendicular to the sampling surface, and in the second state, the axis of the impact rod 110 is inclined to the sampling surface. It can also be expressed as the first state is a state in which the axis of the impact rod 110 is perpendicular to the sampling surface detection, and the second state is a state in which the impact rod 110 is not perpendicular to the sampling surface detection; when the impact rod 110 is in the first state and impacts, the lengths of the multiple marking lines left by the marking unit 200 on the sampling surface are the same, and when the impact rod 110 is in the second state and impacts, the lengths of the multiple marking lines left by the marking unit 200 on the sampling surface are different, which is used to check whether the traces left during the detection process and the reaction detection are effective.

[0047] It should be added that a detection unit is also provided on the rebound test body 100, and the end of the impact rod 110 opposite to the detection end 111 is connected to the detection unit. The detection unit includes a spring, a weight and a display. In the initial state, the impact rod 110 extends out of the rebound test body 100 by a fixed length. In the process of operating the concrete performance detection device of the present invention, the detection end 111 is made to contact the concrete sampling surface to be detected. One hand holds the middle part of the rebound test body 100, and the other hand holds and presses the tail of the rebound test body 100, and applies pressure directed to the detection end 111 to the rebound test body 100, so that the rebound test body 100 moves close to the sampling surface for detection. During the movement of the rebound tester body 100, the spring drives the weight, which strikes the impact rod 110 in contact with the concrete sampling surface with constant kinetic energy, causing the local concrete to deform and absorb part of the energy, and the other part of the energy is converted into the rebound kinetic energy of the weight. When the rebound kinetic energy is completely converted into potential energy, the weight rebounds to the maximum distance, and the display shows the maximum rebound distance of the weight in the form of a rebound value (the ratio of the maximum rebound distance to the initial length of the spring). According to the rebound value, the compressive strength of the concrete is calculated. After one test, stop applying pressure to the detection end 111 at the tail of the rebound tester body 100, and the rebound tester body 100 is reset due to the action of the spring and restored to the initial state, which is convenient for the next sampling.

[0048] In a further embodiment, the marking unit 200 includes a first base plate 300 and a transmission assembly, the first base plate 300 is slidably disposed on the impact rod 110 along the extension direction of the impact rod 110, the first base plate 300 is connected to the rebound test body 100, and moves with the rebound test body 100 to move closer to or away from the detection end 111;

[0049] A plurality of marking members 310 are hinged on one surface of the first bottom plate 300 close to the detection end 111. The plurality of marking members 310 are evenly distributed on the first bottom plate 300 along the circumferential direction. One end of the plurality of marking members 310 is hinged on the edge of the first bottom plate 300, and the other end is freely suspended. Each marking member 310 is hinged to the first bottom plate 300 through a hinge shaft, and the axis of the hinge shaft is perpendicular to the length direction of the connected marking member 310, that is, the marking member 310 can rotate around the hinge shaft, that is, rotate close to or away from the first bottom plate 300. The suspended end of the marking member 310 is the marking end, and the marking end can leave a marking line on the sampling surface.

[0050] The transmission assembly is used to rotate the multiple marking members 310 toward or away from the first bottom plate 300. When the rebound tester body 100 approaches the detection end 111, the transmission assembly rotates the multiple marking members 310 away from the first bottom plate 300, and the multiple marking members 310 can be considered to be extended, and after the marking end contacts the sampling surface, the transmission assembly can rotate the multiple marking members 310 toward the first bottom plate 300, and the multiple marking members 310 can be considered to be retracted.

[0051] The multiple marking members 310 have an initial position and a working position. The initial position of the multiple marking members 310 is the extreme position of the marking members 310 close to the first base plate 300, that is, the first base plate 300 prevents the marking members 310 from continuing to approach the first base plate 300, that is, the multiple marking members 310 are retracted; the working position of the multiple marking members 310 is that the marking members 310 and the first base plate 300 are not in contact except for the hinged end, and the angle between the marking members 310 and the first base plate 300 is an acute angle, that is, the multiple marking members 310 are extended to a fixed position.

[0052] In a further embodiment, the transmission assembly includes a second bottom plate 400, a plurality of hinged rods 410 and a plurality of hinged members 420, the second bottom plate 400 is slidably disposed on the impact rod 110 along the extension direction of the impact rod 110, and the second bottom plate 400 is disposed between the first bottom plate 300 and the rebound tester body 100;

[0053] A plurality of hinges 420 correspond one-to-one to a plurality of marking members 310, a through hole is provided in the middle of the hinge 420, the hinge 420 is slidably provided on the marking member 310 through the through hole, and slides along the length direction of the marking member 310; a plurality of hinged rods 410 correspond one-to-one to a plurality of hinges 420, one end of the hinged rod 410 is hinged to the corresponding hinge 420, and the other end is connected to the second base plate 400; a plurality of light holes are evenly distributed along the circumference of the first base plate 300, and the positions of the plurality of light holes correspond one-to-one to the positions of the plurality of marking members 310, the hinged rod 410 is hinged to the hinge 420 provided on a side of the first base plate 300 close to the detection end 111 through the light hole, the hinged rod 410 slides relative to the first base plate 300, and when the second base plate 400 moves relative to the first base plate 300, the hinged rod 410 rotates the marking member 310 through the hinge 420.

[0054] A first elastic member 430 is provided on the surface of the first base plate 300 away from the detection end 111, one end of the first elastic member 430 is connected to the first base plate 300, and the other end is a freely cantilevered end; a second elastic member 440 is provided on the surface of the second base plate 400 away from the detection end 111, one end of the second elastic member 440 is connected to the second base plate 400, and the other end is connected to the rebound tester body 100, and the second elastic member 440 moves towards or away from the detection end 111 along with the rebound tester body 100.

[0055] When the rebound tester body 100 detects the sampling surface, the rebound tester body 100 moves close to the detection end 111, compressing the second elastic member 440 and driving the second elastic member 440 to move, and driving the second bottom plate 400 to move close to the detection end 111 through the second elastic member 440. In this process, the second bottom plate 400 moves close to the first bottom plate 300 relative to the first bottom plate 300, and the hinged rod 410 connected to the second bottom plate 400 moves close to the first bottom plate 300 with the second bottom plate 400, so that the hinged member 420 moves and rotates, and the multiple marking members 310 rotate away from the first bottom plate 300, and the multiple marking members 310 extend; the rebound tester body 100 continues to move close to the detection end 111, and the second bottom plate 400 contacts the free overhanging end of the first elastic member 430, compressing the first elastic member 430 and pushing the first bottom plate 300 through the first elastic member 430. The plate 300 makes it move closer to the detection end 111. At this time, multiple marking members 310 extend to the working position, maintain the working position and move closer to the detection end 111; the rebound tester body 100 continues to move closer to the detection end 111. When the marking end of the marking member 310 contacts the sampling surface, the marking member 310 is subjected to the pressure given by the sampling surface and moves closer to the first bottom plate 300. Because the second bottom plate 400 is still close to the detection end 111, the hinged rod 410 has a tendency to keep the marking member 310 in the working position. Multiple marking members 310 leave multiple marking lines evenly distributed along the circumferential direction on the sampling surface. The second bottom plate 400 moves away from the detection end 111 due to the pressure given by the hinged rod 410. The second elastic member 440 is further compressed, and the first elastic member 430 rebounds and keeps in contact with the second bottom plate 400. At this time, the detection is completed, and multiple marking lines are left on the sampling surface.

[0056] When the impact rod 110 is detected perpendicular to the sampling surface, one side of the first base plate 300 close to the detection end 111 is parallel to the sampling surface, the spacing is equal everywhere, the rotation angles of multiple marking members 310 are the same, and the lengths of multiple marking lines are the same. When the impact rod 110 is not detected perpendicular to the sampling surface, one side of the first base plate 300 close to the detection end 111 is not parallel to the sampling surface, the spacing between the two is not equal everywhere, and the rotation angles of multiple marking members 310 are different. Under the same moving distance, the rotation angle of the marking member 310 close to the sampling surface is small, and the length of the corresponding marking line is short. The rotation angle of the marking member 310 far from the sampling surface is large, and the length of the corresponding marking line is long. In this way, the lengths of the multiple marking lines are different. When observing the length of the marking lines, if the length difference is within the allowable error range, the sampling process is compliant and the sampling result is valid; if the length difference exceeds the allowable error range, the sampling process is not compliant and the sampling result is invalid.

[0057] In a further embodiment, the marking unit 200 further includes a shell 450, which is hollow and slidably disposed on the impact rod 110, the first bottom plate 300 and the transmission assembly are disposed inside the shell 450, and a through hole is disposed at one end of the shell 450 close to the detection end 111, through which the marking end of the marking member 310 contacts the sampling surface, and in the initial position of the marking member 310, the marking end is located inside the shell 450, and in the working position of the marking member 310, the marking end is located outside the end of the shell 450 where the through hole is disposed, that is, when not in operation, the marking end is retracted into the shell 450 to prevent unnecessary marking lines from being marked on the operator and the sampling surface;

[0058] The diameter of the through hole is smaller than the outer diameter of the first bottom plate 300. The initial position of the first bottom plate 300 is when the rebound tester body 100 is in the initial state, the first bottom plate 300 is in contact with the inner side wall of the housing 450 close to the detection end 111. The housing 450 is used to limit the position of the first bottom plate 300 and to restore the first bottom plate 300 to the initial position after one sampling.

[0059] The outer side surface of the shell 450 away from the detection end 111 is connected to the rebound tester body 100, and the shell 450 moves with the rebound tester body 100. The end of the second elastic member 440 away from the second bottom plate 400 is connected to the inner side wall of the shell 450 away from the detection end 111, and the second elastic member 440 is indirectly connected to the rebound tester body 100; the rebound tester body 100 drives the shell 450 to move closer to or away from the detection end 111, and the shell 450 drives the second bottom plate 400 to move through the second elastic member 440.

[0060] In a further embodiment, a magnet is disposed inside the contact position between the first bottom plate 300 and the impact rod 110, a magnet is disposed on the impact rod 110, and the magnet on the impact rod 110 is disposed at a position corresponding to the initial position of the first bottom plate 300. The magnet on the first bottom plate 300 and the magnet on the impact rod 110 attract each other, so as to keep the first bottom plate 300 in the initial position.

[0061] In a further embodiment, a plurality of limiting grooves 301 are provided on one side of the first base plate 300 close to the detection end 111. The plurality of limiting grooves 301 are evenly distributed along the circumferential direction and extend radially. The plurality of limiting grooves 301 correspond one-to-one to the positions of the plurality of marking members 310. The initial positions of the plurality of marking members 310 are located within the plurality of limiting grooves 301.

[0062] In a further embodiment, the marking member 310 is a marking pen.

[0063] In another embodiment, the marker 310 is a carbon rod.

[0064] In another embodiment, the marking element 310 is made of fluorescent material so that the marking line can be observed at night.

[0065] In combination with the above embodiments, the use principle and working process of the present invention are as follows:

[0066] The overall working process steps are: Figure 5-Figure 6 - Figure 7-Figure 8 - Figure 9-Figure 5 , Figure 5 It represents the initial state of the concrete performance detection device of the present invention, the marking member 310 is retracted and located in the limiting groove 301, the free overhanging end of the first elastic member 430 is not in contact with any entity, and the side of the first bottom plate 300 close to the detection end 111 is in contact with the inner wall of the shell 450.

[0067] The end of the impact rod 110 away from the rebound tester body 100 is pressed against the concrete sampling surface to be tested, and the rebound tester body 100 is pressed to make the rebound tester body 100 move close to the sampling surface. The shell 450 slides on the impact rod 110 close to the sampling surface along with the rebound tester body 100, and the second elastic member 440 is squeezed. The second elastic member 440 pushes the second bottom plate 400 to slide on the impact rod 110 close to the sampling surface, and the hinged rod 410 connected to the second bottom plate 400 moves close to the sampling surface, so that the marking member 310 rotates away from the first bottom plate 300, so that the marking member 310 extends and maintains the working position. This process is from Figure 5 becomes Figure 6 ;

[0068] The rebound tester body 100 continues to move closer to the sampling surface, so that the side of the second bottom plate 400 close to the detection end 111 contacts the first elastic member 430, and the second bottom plate 400 pushes the first bottom plate 300 to move closer to the sampling surface through the first elastic member 430. During this process, the marking member 310 remains in an extended state; until the marking member 310 contacts the sampling surface, this process is from Figure 6 becomes Figure 7 , the marking member 310 contacts the sampling surface and the rebound test body 100 still moves close to the sampling surface. The marking member 310 is subjected to the pressure of the sampling surface to rotate close to the first bottom plate 300 and leaves a mark on the sampling surface. During the rotation of the marking member 310, the hinge rod 410 applies pressure to the second bottom plate 400, causing the second bottom plate 400 to slide away from the sampling surface. Since the rebound test body 100 still moves close to the sampling surface, the second elastic member 440 is further compressed, and the first elastic member 430 rebounds and is always in contact with the second bottom plate 400;

[0069] After the detection unit of the rebound tester body 100 takes a sample, the rebound tester body 100 moves away from the sampling surface, the second elastic member 440 drives the second bottom plate 400 to move away from the sampling surface, the second bottom plate 400 drives the hinged rod 410 to move away from the sampling surface, and the marking member 310 is completely retracted. This process is from Figure 7 Change to Figure 8The rebound tester body 100 continues to move away from the sampling surface, and the inner side wall of the housing 450 close to the sampling surface contacts the first bottom plate 300. This process is from Figure 8 becomes Fig. 9 , and the inner side wall of the housing 450 pushes the first bottom plate 300 to move away from the sampling surface until the rebound test body 100 is reset to the initial position, the first bottom plate 300 returns to the initial position, the second bottom plate 400 and the marking member 310 return to the initial position, and the rebound test body 100 returns to the initial position. This process is from Fig. 9 becomes Figure 5 The concrete performance testing device of the present invention completes the sampling and testing in one time.

[0070] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The above-described embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A concrete performance testing device, characterized in that: It comprises a rebound tester body and a marking unit, one end of the rebound tester body is slidably provided with a striking rod, the end of the striking rod away from the rebound tester body is a detection end, the detection end can reach the concrete sampling surface to be detected, and the rebound tester body can slide close to or away from the detection end; The marking unit is arranged at one end of the rebound test hammer body close to the detection end, and the marking unit moves with the rebound test hammer body, and is used to leave a plurality of marking lines on the sampling surface each time the rebound test hammer body detects the performance of the concrete sampling surface; When the impact rod hits the concrete sampling surface, it has a first state and a second state. In the first state, the axis of the impact rod is perpendicular to the sampling surface, and in the second state, the axis of the impact rod is inclined to the sampling surface. When the impact rod hits in the first state, the lengths of the multiple marking lines left by the marking unit are the same, and when the impact rod hits in the second state, the lengths of the multiple marking lines left by the marking unit are different. The marking unit comprises a first bottom plate and a transmission assembly, wherein the first bottom plate is slidably arranged on the impact rod along the extension direction of the impact rod, and the first bottom plate is connected to the rebound tester body and moves with the rebound tester body; A plurality of marking members are hinged on one surface of the first bottom plate close to the detection end, and the plurality of marking members are evenly distributed along the circumferential direction, one end of the plurality of marking members is hinged to the edge of the first bottom plate through a hinge shaft, and the other end is freely suspended, the axis of the hinge shaft is perpendicular to the length direction of the marking member, and the suspended end of the marking member is the marking end; The transmission assembly is used to rotate the plurality of marking members, and the transmission assembly comprises a second bottom plate, a plurality of hinged rods and a plurality of hinged members, the second bottom plate is slidably arranged on the impact rod along the extension direction of the impact rod, and the second bottom plate is arranged between the first bottom plate and the rebound tester body; The plurality of hinges correspond to the plurality of marking members one by one, and the hinges are slidably arranged on the marking members along the length direction of the marking members; the plurality of hinge rods correspond to the plurality of hinges one by one, and one end of each hinge rod is hinged to the corresponding hinge member, and the other end is connected to the second bottom plate; A first elastic member is provided on a side of the first base plate away from the detection end, one end of the first elastic member is connected to the first base plate, and the other end is a freely cantilevered end; a second elastic member is provided on a side of the second base plate away from the detection end, one end of the second elastic member is connected to the second base plate, and the other end is connected to the rebound tester body, and the second elastic member moves with the rebound tester body.

2. The concrete performance detection device according to claim 1, characterized in that: The marking unit further comprises a shell, the shell is hollow and slidably arranged on the impact rod, the first bottom plate and the transmission assembly are both arranged inside the shell, a through hole is arranged on the end surface of the shell close to the detection end, the marking end of the marking member contacts the sampling surface through the through hole, the diameter of the through hole is smaller than the outer diameter of the first bottom plate, and the first bottom plate is initially in a state of abutting against the inner side wall of the shell close to the detection end; The outer side surface of the shell away from the detection end is connected to the rebound tester body, and the shell moves with the rebound tester body. One end of the second elastic member away from the second bottom plate is connected to the inner side wall of the shell away from the detection end, and the second elastic member is indirectly connected to the rebound tester body.

3. The concrete performance detection device according to claim 1, characterized in that: A magnet is arranged inside the contact position between the first bottom plate and the impact rod, and a magnet is arranged on the impact rod. The magnet on the first bottom plate and the magnet on the impact rod attract each other.

4. The concrete performance detection device according to claim 1, characterized in that: A plurality of limiting grooves are arranged on one side of the first bottom plate close to the detection end. The plurality of limiting grooves are evenly distributed along the circumferential direction and extend along the radial direction. The limiting grooves correspond to the positions of the marking members one by one.

5. The concrete performance detection device according to claim 1, characterized in that: The marking piece is a marking pen.

6. The concrete performance detection device according to claim 1, characterized in that: The marking piece is a carbon rod.

7. The concrete performance detection device according to claim 1, characterized in that: The marking piece is made of fluorescent material and is used for observation at night.

8. The concrete performance testing device according to claim 1, characterized in that: The rebound tester body has a detection unit, and the detection unit is used to impact the impact rod and detect the rebound value of the concrete sampling surface after the impact.

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