Resiliometer for concrete strength detection

Abstract

The utility model provides a rebound apparatus for concrete strength detection, which comprises a rebound apparatus body, a clamping component, a guide frame, an auxiliary support plate and a verticality detection component, the auxiliary support plate can play a role in auxiliary support during the detection of the rebound apparatus, original point-to-point contact is changed into face-to-face contact, and the verticality of the rebound apparatus is detected. And the elastic rod of the rebound apparatus body can be in contact with the surface of the concrete member in a vertical posture. According to the rebound apparatus, the rebound apparatus body is clamped and fixed through the clamping assembly, and the holding part is arranged on the guide frame, so that an operator can grasp the rebound apparatus conveniently, and the problem that the rebound apparatus body cannot be firmly grabbed due to sweating of the palm is solved. The perpendicularity detection assembly is arranged, the pressure detection elements at different positions are used for detecting whether pressure exists on the surfaces of the auxiliary supporting plate and the concrete member or not, the indicator lamp is used for prompting, an operator can visually know whether the elastic rod is kept in the vertical posture or not during detection of the rebound instrument, use is easy, and operation is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of concrete strength detection, and particularly relates to a rebound tester for concrete strength detection. Background Art

[0002] Currently, the commonly used on-site testing methods for concrete strength in the industry include the rebound method, ultrasonic method, core drilling method, and pullout method. Among them, the rebound method is widely used due to its advantages such as simple operation, low cost, and high testing efficiency.

[0003] A rebound hammer is a testing instrument based on the rebound method. It must be held perpendicular to the surface of the concrete component being tested. Traditional rebound hammers only contact the impact rod and the concrete component, which is point-to-point contact. This makes the instrument's accuracy significantly affected by human factors when held manually. Sweaty palms can cause the hammer to slip, and shaking arms can prevent it from maintaining a vertical position, affecting the accuracy of test results. Utility Model Content

[0004] The utility model provides a rebound hammer for concrete strength testing, aiming to solve the problem that the accuracy of the rebound hammer in the prior art is easily affected by factors such as sweating of the user's palms and shaking of the arms.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is to provide a rebound hammer for concrete strength testing, comprising:

[0006] The rebound hammer body has a rebound rod that can be extended and retracted along its own axis;

[0007] The clamping assembly includes a first clamping member and a second clamping member, wherein the first clamping member and the second clamping member are detachably connected to each other, and the first clamping member and the second clamping member jointly enclose a clamping space, wherein the rebound hammer body is partially accommodated in the clamping space, and the impact rod extends out of the clamping space;

[0008] a guide frame having a guide portion arranged along the axial direction of the rebound hammer body and a gripping portion connected to the guide portion, wherein the first clamping member is slidably fitted in the guide portion;

[0009] an auxiliary support plate connected to one end of the guide portion and having an avoidance hole for the impact rod to pass through;

[0010] The verticality detection assembly includes multiple pressure detection elements and multiple indicator lights. The multiple pressure detection elements are arranged on the auxiliary support plate at intervals along the circumference of the avoidance hole. The indicator lights and the pressure detection elements are arranged on the auxiliary support plate in a one-to-one correspondence. The pressure detection element is used to detect the pressure on the side of the auxiliary support plate that is used to contact the surface of the concrete component. The pressure detection element and the indicator lights are communicatively connected. When the pressure value of the pressure detection element reaches a preset value, the corresponding indicator light can emit a light signal.

[0011] In a possible implementation, the rebound hammer body is a digital rebound hammer, and the first clamping member and / or the second clamping member is provided with an observation port, and the observation port corresponds to a screen of the digital rebound hammer.

[0012] In a possible implementation, the first clamping member includes:

[0013] Two first beadings are spaced apart along the axial direction of the rebound hammer body, the first beadings are arc-shaped, and the concave surfaces of the first beadings are used to form the clamping space;

[0014] a first connecting strip connected between the two first pressing strips; and

[0015] The sliding bar is connected between the two first pressure bars and is slidably matched with the guide portion.

[0016] In a possible implementation, the second clamping member includes:

[0017] two second beadings, spaced apart along the axial direction of the rebound hammer body, the second beadings being arc-shaped, and the concave surfaces of the second beadings being used to form the clamping space; and

[0018] The second connecting strip is connected between the two second pressing strips.

[0019] In a possible implementation manner, the first clamping member and the second clamping member are connected by screws.

[0020] In a possible implementation, inner surfaces of the first clamping member and the second clamping member forming the clamping space are respectively provided with rubber gaskets.

[0021] In a possible implementation, the guide portion includes a plurality of guide rods arranged in parallel, the gripping portion is connected between at least two of the guide rods, and the first clamping member is in sliding engagement with at least two of the guide rods.

[0022] In a possible implementation, the gripping portion is a gripping handle.

[0023] In a possible implementation, the auxiliary support plate has a mounting hole extending through the auxiliary support plate in its thickness direction. The detection end of the pressure detection element is disposed in the mounting hole and protrudes from the auxiliary support plate for contacting with the surface of the concrete component.

[0024] In a possible implementation, the pressure detection element is a piezoelectric pressure sensor.

[0025] Compared with the prior art, the concrete strength test hammer provided by the present invention has the following beneficial effects:

[0026] The concrete strength tester provided by the present invention includes a rebound hammer body, a clamping assembly, a guide frame, an auxiliary support plate, and a verticality detection assembly. During use, the rebound hammer body can be clamped and fixed by a first clamping member and a second clamping member. The operator holds the gripping portion with one hand to make the auxiliary support plate fit the surface of the concrete component to be tested. After multiple indicator lights are all lit, it means that multiple pressure detection elements have all detected pressure, and at this time, the auxiliary support plate has been fitted to the surface of the concrete component. Because the guide portion is perpendicular to the plate surface direction of the auxiliary support plate, the operator only needs to use the other hand to push the rebound hammer body forward while the multiple indicator lights are on, so that the rebound rod of the rebound hammer body contacts the surface of the concrete component and rebounds, thereby completing the test.

[0027] The present invention provides an auxiliary support plate, which can play an auxiliary support role during the rebound hammer test, changing the original point-to-point contact into face-to-face contact, which helps to make the impact rod of the rebound hammer body contact the surface of the concrete component in a vertical posture, thereby improving the detection accuracy. The present invention fixes the rebound hammer body by clamping the clamping assembly, and provides a gripping portion on the guide frame to facilitate the operator's grip, solving the problem of being unable to grip the rebound hammer body due to sweaty palms. By providing a verticality detection assembly, pressure detection elements at different positions are used to detect whether there is pressure on the auxiliary support plate and the surface of the concrete component, and an indicator light is used to prompt, so that the operator can intuitively understand whether the impact rod maintains a vertical posture during the rebound hammer test. It is simple to use and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of a rebound hammer for concrete strength testing provided in one embodiment of the present invention Figure 1 ;

[0029] Figure 2 A schematic diagram of the structure of a rebound hammer for concrete strength testing provided in one embodiment of the present invention Figure 2 ;

[0030] Figure 3An explosion diagram of a rebound hammer for concrete strength testing provided in one embodiment of the present utility model;

[0031] Figure 4 A schematic diagram of the structure of a rebound hammer for concrete strength testing provided in one embodiment of the present invention Figure 3 .

[0032] Description of reference numerals:

[0033] 1. Rebound hammer for concrete strength testing;

[0034] 10. Rebound hammer body; 11. Rebound rod; 12. Screen;

[0035] 20. Clamping assembly; 21. First clamping member; 211. First pressure strip; 212. First connecting strip; 213. Sliding strip; 22. Second clamping member; 221. Second pressure strip; 222. Second connecting strip; 23. Screw; 24. Rubber gasket;

[0036] 30. Guide frame; 31. Guide rod; 32. Grip handle;

[0037] 40. Auxiliary support plate; 41. Avoidance hole;

[0038] 50. Verticality detection component; 51. Pressure detection element; 52. Indicator light. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0040] It should be noted that when an element is referred to as being "fixed to," "fixed," or "fixedly disposed" on another element, it may be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to," "connected to" another element, it may be directly connected to the other element or there may also be an intermediate element. When an element is referred to as being "set on," "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. "Multiple" refers to two or more. "At least one" refers to one or more. "Several" refers to one or more.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0042] Please also refer to Figures 1 to 4, the concrete strength testing instrument 1 provided in an embodiment of the present invention is described below.

[0043] See also Figures 1 to 4 The embodiment of the utility model provides a rebound hammer 1 for concrete strength detection, including a rebound hammer body 10, a clamping assembly 20, a guide frame 30, an auxiliary support plate 40 and a verticality detection assembly 50. The rebound hammer body 10 has a striking rod 11 that can be extended and retracted along its own axis; the clamping assembly 20 includes a first clamping member 21 and a second clamping member 22, the first clamping member 21 and the second clamping member 22 are detachably connected, and the first clamping member 21 and the second clamping member 22 together enclose a clamping space, the rebound hammer body 10 is partially accommodated in the clamping space, and the striking rod 11 extends out of the clamping space; the guide frame 30 has a guide portion arranged along the axial direction of the rebound hammer body 10, and a gripping portion connected to the guide portion, the first clamping member 21 is slidably fitted in the guide portion; the auxiliary support plate 40 is connected to one end of the guide portion, and has There is an avoidance hole 41 for the bullet-feeding rod 11 to pass through; the verticality detection component 50 includes a plurality of pressure detection elements 51 and a plurality of indicator lights 52. The plurality of pressure detection elements 51 are arranged on the auxiliary support plate 40 at circumferential intervals along the avoidance hole 41, and the indicator lights 52 and the pressure detection elements 51 are arranged on the auxiliary support plate 40 in a one-to-one correspondence. The pressure detection element 51 is used to detect the pressure on the side of the auxiliary support plate 40 that is used to fit the surface of the concrete component. The pressure detection element 51 and the indicator light 52 are communicatively connected. When the pressure value of the pressure detection element 51 reaches a preset value, the corresponding indicator light 52 can emit a light signal.

[0044] Compared with the prior art, the concrete strength testing test hammer 1 provided by the embodiment of the present invention has the following beneficial effects:

[0045] The concrete strength test hammer 1 provided in the embodiment of the present invention includes a test hammer body 10, a clamping assembly 20, a guide frame 30, an auxiliary support plate 40 and a verticality detection assembly 50. When in use, the test hammer body 10 is clamped and fixed by a first clamping member 21 and a second clamping member 22. The operator holds the gripping portion with one hand to make the auxiliary support plate 40 fit the surface of the concrete component to be tested. After the multiple indicator lights 52 are all lit, it means that the multiple pressure detection elements 51 have all detected pressure, and at this time the auxiliary support plate 40 has been fitted to the surface of the concrete component. Since the guide portion is perpendicular to the plate surface direction of the auxiliary support plate 40, the operator only needs to use the other hand to push the test hammer body 10 forward while the multiple indicator lights 52 are lit, so that the impact rod 11 of the test hammer body 10 abuts the surface of the concrete component and completes the rebound, thereby completing the test.

[0046] The embodiment of the present invention provides an auxiliary support plate 40, which can play an auxiliary support role during the rebound hammer test, and changes the original point-to-point contact into face-to-face contact, which helps to make the impact rod 11 of the rebound hammer body 10 contact the surface of the concrete component in a vertical posture, thereby improving the detection accuracy. The embodiment of the present invention clamps and fixes the rebound hammer body 10 through the clamping assembly 20, and provides a gripping portion on the guide frame 30 to facilitate the operator's grip, solving the problem of being unable to grip the rebound hammer body 10 due to sweating palms. By providing a verticality detection assembly 50, the pressure detection elements 51 at different positions are used to detect whether there is pressure between the auxiliary support plate 40 and the surface of the concrete component, and the indicator light 52 is used to prompt, so that the operator can intuitively understand whether the impact rod 11 maintains a vertical posture during the rebound hammer test. It is simple to use and easy to operate.

[0047] In the embodiment of the present invention, the rebound hammer body 10 can directly select a qualified model available on the market, which can be a mechanical type or a digital type. The rebound hammer body 10 can be used to test the strength of concrete components such as buildings and bridges using the rebound method. The specific structure and working principle of the rebound hammer body 10 are prior art, which can be understood and implemented by those skilled in the art and will not be described in detail here. The rebound hammer body 10 usually has a cylindrical metal shell, and the clamping assembly 20 is clamped on the outside of the metal shell. After use, the rebound hammer body 10 can be disassembled and placed in a storage box for storage.

[0048] The clamping assembly 20 includes two clamping members, a first clamping member 21 and a second clamping member 22. When aligned, the first clamping member 21 and the second clamping member 22 securely hold the rebound hammer body 10 within the clamping space. The dimensions of the first and second clamping members 21 and 22 should match the shape of the rebound hammer body 10. The first and second clamping members 21 and 22 are detachably connected to facilitate removal of the rebound hammer body 10 after testing. The first and second clamping members 21 and 22 can be connected using screws 23, straps, buckles, or other similar means.

[0049] The guide frame 30 is convenient for the operator to hold, and it can also guide the rebound hammer body 10 as it moves along its own axis, ensuring that the rebound hammer body 10 maintains a stable posture during testing, thereby improving the accuracy of the testing structure. The auxiliary support plate 40 can be a circular plate, an arc plate, a square plate, or other shapes. The auxiliary support plate 40 needs to be attached to the surface of the concrete component during testing, so that the pressure detection element 51 abuts the concrete component. In this way, when the impact rod 11 of the rebound hammer body 10 is not perpendicular to the surface of the concrete component, at least one indicator light 52 will not light up, and the user can intuitively know that the position or posture of the rebound hammer body 10 needs to be adjusted.

[0050] The pressure detection element 51 is a pressure sensor, which can be directly selected from suitable types and models on the market, and two or more sensors can be set as needed. The indicator light 52 is used to light up when the pressure sensor detects a certain pressure value, reminding the operator that the position has been fitted with the concrete member.

[0051] It is understandable that the pressure detection element 51 and the indicator light 52 require electrical energy when working, and can be powered by a battery. The battery can be directly set on the guide frame 30, or it can be used as an external battery, and the battery and the pressure detection element 51 and the indicator light 52 are connected by signal lines and guides. As needed, a controller can be set to determine whether the pressure value of the pressure detection element 51 reaches a preset value. The preset value should be greater than 0. The indicator light 52 can be an LED lamp bead, which can light up red, green, etc. as needed. The indicator light 52 corresponds to the pressure detection element 51 one by one, and the light is on, which means that the position has been in contact with the surface of the concrete component and there is a certain pressure.

[0052] It should be noted that in order to ensure that the concrete strength testing test hammer 1 provided by the present invention can be used normally, the position of the concrete component to be tested should be flat and without depressions, so that the pressure detection element 51 can abut against the position of the concrete component to be tested.

[0053] See also Figure 1 and Figure 3 In some possible embodiments, the rebound hammer body 10 is a digital rebound hammer, and at least one of the first clamping member 21 or the second clamping member 22 is provided with an observation port, which corresponds to the screen 12 of the digital rebound hammer to facilitate the operator to read the reading from the observation port.

[0054] See also Figure 2 and Figure 3 In some possible embodiments, the first clamping member 21 includes a first pressure strip 211, a first connecting strip 212, and a sliding strip 213. The two first pressure strips 211 are spaced apart along the axial direction of the rebound hammer body 10. The first pressure strips 211 are arc-shaped, and the concave surface of the first pressure strips 211 is used to form a clamping space; the first connecting strip 212 is connected between the two first pressure strips 211; and the sliding strip 213 is connected between the two first pressure strips 211 and slidably engages with the guide portion.

[0055] In this embodiment, the first clamping member 21 includes a first pressure strip 211, a first connecting strip 212 and a sliding strip 213. The first pressure strip 211 and the first connecting strip 212 are provided with two, respectively, which can be enclosed to form a Figure 3The frame structure shown here provides a secure clamping function while also being compatible with both mechanical and digital rebound hammers. The number of sliding bars 213 can be one or more, and the first pressing bar 211, the first connecting bar 212, and the sliding bar 213 can be connected by gluing, hot-melt bonding, welding, or the like.

[0056] Considering the hand feeling, the weight of the clamping assembly 20, auxiliary support plate 40 and guide frame 30 should not be too heavy. Under the premise of meeting the structural strength requirements, they can be made of lightweight materials such as aluminum alloy and plastic. When steel is used, some components can be hollow.

[0057] See also Figure 3 and Figure 4 In some possible embodiments, the second clamping member 22 includes a second pressure strip 221 and a second connecting strip 222. The two second pressure strips 221 are spaced apart along the axial direction of the rebound hammer body 10. The second pressure strips 221 are arc-shaped, and the concave surface of the second pressure strips 221 is used to form a clamping space. The second connecting strip 222 connects between the two second pressure strips 221. The shape and structure of the second clamping member 22 can be similar to that of the first clamping member 21, except that the second clamping member 22 does not need to be provided with the sliding bar 213.

[0058] See also Figures 1 to 4 In some possible embodiments, the first clamping member 21 and the second clamping member 22 are connected by screws 23, and the installation and disassembly are simple.

[0059] See also Figure 3 In some possible embodiments, the inner surfaces of the clamping spaces formed by the first clamping member 21 and the second clamping member 22 are respectively provided with rubber gaskets 24. The rubber gaskets 24 can prevent marks from being generated on the surface of the rebound hammer body 10 due to excessive clamping force of the clamping members.

[0060] See also Figure 2 and Figure 3 In some possible embodiments, the guide portion includes a plurality of parallel guide rods 31, the gripping portion is connected between at least two of the guide rods 31, and the first clamping member 21 slides with at least two of the guide rods 31 to ensure stable force and prevent the guide frame 30 from twisting and deforming.

[0061] See also Figure 3 and Figure 4 In some possible embodiments, the gripping portion is a gripping handle 32 . To facilitate gripping, a rubber anti-slip sleeve may be provided on the gripping handle 32 .

[0062] See also Figure 2In some possible embodiments, the auxiliary support plate 40 has a mounting hole that runs through its thickness direction, and the detection end of the pressure detection element 51 is provided in the mounting hole and protrudes from the surface of the auxiliary support plate 40.

[0063] In some possible embodiments, the pressure detection element 51 is of piezoelectric, piezoresistive, ceramic, diaphragm, capacitive, etc. type, and can be selected and set according to actual needs.

[0064] It can be understood that the various parts in the above embodiments can be freely combined or deleted to form different combination embodiments. The specific contents of each combination embodiment will not be repeated here. After this description, it can be considered that the specification of the utility model has recorded various combination embodiments and can support different combination embodiments.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Rebound hammer for concrete strength testing, characterized by: include: The rebound hammer body has a rebound rod that can be extended and retracted along its own axis; The clamping assembly includes a first clamping member and a second clamping member, wherein the first clamping member and the second clamping member are detachably connected to each other, and the first clamping member and the second clamping member jointly enclose a clamping space, wherein the rebound hammer body is partially accommodated in the clamping space, and the impact rod extends out of the clamping space; a guide frame having a guide portion arranged along the axial direction of the rebound hammer body and a gripping portion connected to the guide portion, wherein the first clamping member is slidably fitted in the guide portion; an auxiliary support plate connected to one end of the guide portion and having an avoidance hole for the impact rod to pass through; as well as The verticality detection assembly includes multiple pressure detection elements and multiple indicator lights. The multiple pressure detection elements are arranged on the auxiliary support plate at intervals along the circumference of the avoidance hole. The indicator lights and the pressure detection elements are arranged on the auxiliary support plate in a one-to-one correspondence. The pressure detection element is used to detect the pressure on the side of the auxiliary support plate that is used to contact the surface of the concrete component. The pressure detection element and the indicator lights are communicatively connected. When the pressure value of the pressure detection element reaches a preset value, the corresponding indicator light can emit a light signal.

2. The concrete strength tester according to claim 1, characterized in that: The rebound hammer body is a digital rebound hammer, and at least one of the first clamping member and the second clamping member is provided with an observation port, and the observation port corresponds to a screen of the digital rebound hammer.

3. The concrete strength tester according to claim 1, characterized in that: The first clamping member comprises: Two first beadings are spaced apart along the axial direction of the rebound hammer body, the first beadings are arc-shaped, and the concave surfaces of the first beadings are used to form the clamping space; a first connecting strip connected between the two first pressing strips; and The sliding bar is connected between the two first pressure bars and is slidably matched with the guide portion.

4. The rebound hammer for testing concrete strength according to claim 1, characterized in that: The second clamping member comprises: two second beadings, spaced apart along the axial direction of the rebound hammer body, the second beadings being arc-shaped, and the concave surfaces of the second beadings being used to form the clamping space; and The second connecting strip is connected between the two second pressing strips.

5. The rebound hammer for concrete strength testing according to claim 1, characterized in that: The first clamping member and the second clamping member are connected by screws.

6. The rebound hammer for testing concrete strength according to claim 1, characterized in that: The inner surfaces of the first clamping member and the second clamping member forming the clamping space are respectively provided with rubber gaskets.

7. The rebound hammer for testing concrete strength according to claim 1, characterized in that: The guide portion includes a plurality of guide rods arranged in parallel, the gripping portion is connected between at least two of the guide rods, and the first clamping member is slidably engaged with at least two of the guide rods.

8. The rebound hammer for testing concrete strength according to claim 1, characterized in that: The holding portion is a holding handle.

9. The rebound hammer for concrete strength testing according to claim 1, characterized in that: The auxiliary support plate has a mounting hole that passes through the auxiliary support plate in its thickness direction. The detection end of the pressure detection element is arranged in the mounting hole and protrudes from the surface of the auxiliary support plate.

10. The rebound hammer for testing concrete strength according to claim 9, characterized in that: The pressure detection element is a piezoelectric pressure sensor.

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