Concrete strength detector

Abstract

The utility model provides a concrete strength detector, including positioning frame and set up on the detection module on the positioning frame, the positioning frame includes the bottom frame that can fit the surface of detection object, is provided with at least two positioning nail that is arranged along the circumference on the bottom frame, the bottom frame passes through the connection skeleton and is connected with the top frame, and the top frame passes through the connection skeleton. The detection module is vertically fixed on the top frame, the angle posture of the detection module and the surface of the detection object can be guaranteed through the positioning frame, and detection errors caused by posture deviation of the detection module are reduced. According to the concrete strength detector provided by the utility model, attitude positioning can be carried out through the positioning frame, the perpendicularity of the driving hammer of the detection module and the surface of a detected object can be guaranteed, the detection accuracy is further guaranteed, the consistency of the detected attitude is high, errors caused by attitude errors between different point position detection or successive detection can be effectively reduced, and the detection accuracy is improved. And the detection reliability is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to concrete detection technical field, especially relate to a concrete strength detector. BACKGROUND

[0002] The concrete ground has the characteristics such as high strength, strong waterproofness, good durability, good environmental protection and diversity, and is widely used in high-strength places such as road, underground garage, underground shopping mall, parking lot, corridor and basement.

[0003] Among them, for the road surface application scene, the quality of the concrete ground is directly related to the driving safety and the road service life. Generally, the compressive strength and the quality level of the concrete ground are evaluated by elasticity detection to ensure that it reaches the design requirement, so as to guarantee the bearing capacity and durability of the road.

[0004] The rebound detection is a commonly used elastic detection method of the concrete ground. Its principle is to measure the hardness of the concrete surface by the non-destructive detection of the rebound detector, and then calculate the compressive strength, so as to evaluate the concrete quality without damaging the road surface. In order to guarantee the detection accuracy, the vertical degree of the hammering in use needs to be guaranteed, and the rebound detector generally lacks the collimation structure, and the vertical degree in use is completely controlled by manual, so the vertical degree is difficult to guarantee, resulting in insufficient detection accuracy. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model aims at providing a concrete strength detector to solve the problem of insufficient detection accuracy caused by the lack of guarantee of the vertical degree of hammering in use of the rebound detector in the prior art.

[0006] The utility model provides a concrete strength detector, which comprises a positioning frame and a detection module arranged on the positioning frame, wherein,

[0007] The detection module comprises a guide cylinder, a hammer and a hammer driver, the hammer is coaxially nested in the guide cylinder, a position sensor arranged in the axial direction is arranged between the guide cylinder and the hammer, the hammer driver is fixedly arranged on the guide cylinder and is in transmission connection with the hammer.

[0008] The positioning frame comprises a bottom frame which can be attached to the surface of the detection object, at least two positioning nails are arranged on the bottom frame in the circumferential direction, the bottom frame is connected with the top frame through a connecting framework, the guide cylinder is vertically fixed on the top frame, so that the hammering end of the hammer is vertically arranged downward.

[0009] Optionally, the bottom frame comprises a contact ring, a guide ring and a driving ring which are sequentially arranged from bottom to top, wherein,

[0010] The contact ring and the guide ring are fixed on the connecting framework, and the guide hole and the spiral hole are respectively arranged on the contact ring and the guide ring in a matched manner;

[0011] The positioning nail is rotatably connected with the driving ring, a spiral groove is arranged on the positioning nail, and the spiral groove is screw matched with the spiral hole.

[0012] Optionally, the positioning frame is further provided with a first driving cylinder, the first driving cylinder is fixedly arranged on the top frame, an active end is connected to the driving ring, and at least two first driving cylinders are uniformly arranged along the circumference of the top frame.

[0013] Optionally, the firing device comprises a second driving cylinder.

[0014] Optionally, the hammer comprises a pull rod and a striking rod, a partition block is arranged at the bottom end of the pull rod and connected with the striking rod through the partition block, the striking rod is arranged at the bottom end of the guide cylinder, the top end of the pull rod is arranged at the top end of the guide cylinder, and a pull ring is arranged at the top end of the pull rod;

[0015] The firing device comprises a first spring, the first spring is sleeved on the pull rod, and two ends of the first spring are respectively abutted to the guide cylinder and the partition block;

[0016] The guide cylinder is further provided with a buckle and a guide window, the partition block further extends a guide block in the side direction, the guide block is arranged at the guide window, and the guide block is lock matched with the buckle.

[0017] Optionally, the guide window and the guide block are symmetrically arranged in two groups, the buckle comprises a fixed frame and a movable frame, wherein,

[0018] The fixed frame is fixedly arranged on the guide cylinder and comprises a first functional segment bent to the position of the guide window, and a positioning hole is arranged on the first functional segment;

[0019] The movable frame is arranged outside the fixed frame in an interval manner and comprises a second functional segment bent to the position of the guide window, an installation rod is arranged on the second functional segment, the installation rod is arranged to point to the guide window through the positioning hole, a clamping block lock matched with the guide block is arranged at the end of the installation rod, a second spring is sleeved on the installation rod, and the second spring is located between the fixed frame and the movable frame;

[0020] The guide cylinder is further provided with a spring frame, an unlocking button is arranged on the spring frame, the unlocking button is in contact with the inclined surface of the movable frame, so that when the unlocking button is pressed, the movable frame can be driven to move in the axial direction of the installation rod and away from the guide cylinder.

[0021] Optionally, a pulley is arranged on the movable frame, and the pulley is in contact with the unlocking button.

[0022] Optionally, a handle is arranged on the guide cylinder, and the handle is arranged in position with the unlocking button.

[0023] Optionally, a third spring is arranged on the hammer rod, and the third spring is arranged between the partition block and the guide cylinder.

[0024] Optionally, the position sensor comprises an inductive strip and an inductive block, the inductive block is arranged on the guide block, and the inductive strip is arranged outside the guide window and is arranged opposite to the inductive block.

[0025] The concrete strength detector comprises a positioning frame and a detection module arranged on the positioning frame, wherein the detection module comprises a guide cylinder, a hammer and a hammer driver, the hammer is coaxially nested in the guide cylinder, a position sensor arranged in an axial direction is arranged between the guide cylinder and the hammer, the hammer driver is fixedly arranged on the guide cylinder and is in transmission connection with the hammer, and the hammer can be hit out with a fixed hammering force to hit the surface of a detection object during hammering, and the maximum rebound can be recorded by the position sensor; the positioning frame comprises a bottom frame which can be attached to the surface of the detection object, at least two positioning nails arranged in a circumferential direction are arranged on the bottom frame, the bottom frame is connected with a top frame through a connecting framework, the guide cylinder is vertically fixed on the top frame so that the hammering end of the hammer is vertically arranged downward, the positioning frame can be vertically positioned on the surface of the detection object through the bottom frame, the perpendicularity between the detection module fixedly arranged on the positioning frame and the surface of the detection object is ensured, the positioning nails are used for limiting, the deviation and displacement of the positioning frame can be reduced, the posture positioning effect is further ensured, and the accuracy of detection is improved. The concrete strength detector can be postured and positioned through the positioning frame, the perpendicularity between the hammer of the detection module and the surface of the detection object can be ensured, the accuracy of detection is ensured, the consistency of the detection posture is high, the error caused by the posture error between different point detections or the posture error between the first detection and the second detection can be effectively reduced, and the reliability of detection is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 FIG. 1 is a main structure schematic view of a concrete strength detector in the embodiment of the utility model;

[0027] Figure 2 FIG. 2 is a structure schematic view of a detection module of the concrete strength detector in the embodiment of the utility model;

[0028] Figure 3 FIG. 3 is an explosion structure schematic view of the detection module of the concrete strength detector in the embodiment of the utility model.

[0029] The following detailed description will further explain the present application with reference to the above mentioned drawings. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The drawings show several embodiments of the present application. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0031] It should be noted that when an element is referred to as being "fixedly attached" to another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can also be present. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0032] 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 application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0033] To solve the problem of lack of guarantee of hammering verticality in rebound hammer use in the prior art, resulting in insufficient detection accuracy, the present application provides a concrete strength detector, comprising a positioning frame and a detection module arranged on the positioning frame, the positioning frame positions the moving direction of the hammer in the detection module, and the positioning frame positions the whole instrument on the surface of the detection object, which can effectively fix the posture between the hammer and the detection object, reduce the error introduced by the posture deviation, and improve the test accuracy.

[0034] Specifically, please refer to Figure 1 , Figure 2 and Figure 3 , the detection module comprises a guide cylinder 1, a hammer and a hammer, the hammer is coaxially nested in the guide cylinder 1, a position sensor is arranged between the guide cylinder 1 and the hammer along the axial direction, the hammer is fixedly arranged on the guide cylinder 1 and is in transmission connection with the hammer, so that the hammer can be hit out along the axial direction of the guide cylinder 1 by the hammer at a predetermined force through the hammer, so that the force of hammering to the surface of the detection object is consistent, and the maximum rebound stroke of the hammer after rebounding can be obtained through the position sensor, according to the pre-calibrated force of hammering to the surface of the detection object and the maximum rebound stroke, the rebound coefficient can be obtained according to the relationship between the two, and then the performance of the detection object can be obtained.

[0035] The positioning frame comprises a bottom frame which can be attached to the surface of the detected object, the bottom frame being provided with at least two positioning nails 12 arranged in the circumferential direction, the bottom frame being connected to the top frame 9 through a connecting frame, and the guide cylinder 1 being vertically fixed on the top frame 9 so that the hammering end of the hammer is vertically arranged downward.

[0036] In use, the concrete strength detector can be stably placed on the detected object through the bottom frame of the positioning frame, and positioned through the positioning nails 12 to avoid deviation of the concrete strength detector on the horizontal plane, and then the hammer is knocked out with a predetermined force through the operation of the trigger, and the hammer can be knocked to the surface of the detected object after a fixed stroke through the positioning and limiting of the positioning frame, further ensuring the consistency of the force of hammering to the surface of the detected object.

[0037] The position sensor can also be communicatively connected to an industrial computer (not shown in the figure) which can obtain the rebound coefficient according to the sensing value of the position sensor, and the industrial computer is pre-installed with a rebound coefficient calculator for calculation, so that the rebound coefficient can be automatically calculated by inputting the sensing value of the position sensor into the calculator, and the industrial computer can be realized by programmable logic controller, single-chip microcomputer, etc., and specifically, it can be fixedly installed on the positioning frame or the guide cylinder.

[0038] The position sensor can be selected from grating sensor, piezoelectric displacement sensor, magnetic grating sensor, etc., and is composed of a sensing strip 8 and a sensing block 7, the sensing block 7 is fixedly arranged on the hammer, and the sensing strip 8 is fixedly arranged on the guide cylinder 1, in one detection, the sensing block moves in one direction on the sensing strip, and after reaching the limit position, gradually decaying oscillation waveform appears due to rebound, and the maximum value of the oscillation waveform is the maximum rebound stroke. According to actual needs, the position sensor can be arranged inside or outside the guide cylinder 1.

[0039] In order to facilitate the operation of the positioning nails to realize the positioning and limiting of the positioning frame to the detected object, in the embodiment, the bottom frame comprises a contact ring, a guide ring 13 and a driving ring 11 which are sequentially arranged from bottom to top, wherein the contact ring and the guide ring 13 are fixed on the connecting frame, the contact ring and the guide ring 13 are respectively provided with a guide hole and a spiral hole matched in position, and the positioning nail 12 passes through the guide hole and the spiral hole; the positioning nail 12 is rotatably connected with the driving ring 11, the positioning nail 12 is provided with a spiral groove, and the spiral groove is matched with the spiral hole in a spiral manner, so that the positioning nail 12 can be rotated and moved downward through the matching of the spiral groove and the spiral hole by driving the driving ring 11 to move downward, which facilitates the synchronous penetration of the positioning nails 12 into the detected object, and ensures the stability and reliability of the fixation of the positioning frame.

[0040] When the hardness of the detection object is high and the positioning nails 12 cannot be effectively nailed in, the tips of the positioning nails 12 can still limit the positioning frame to the surface of the detection object to avoid deviation. When the positioning nails 12 can be effectively nailed in, the positioning frame can be prevented from being bounced up, thereby ensuring the reliability of the detection, reducing the stability requirements of the concrete strength detector during detection, reducing the weight of the instrument, and facilitating the manual transportation of the instrument between different detection points, thereby ensuring the convenience of use.

[0041] To facilitate the driving operation of the driving ring 11, in the embodiment, a first driving cylinder 10 is further arranged on the positioning frame, the first driving cylinder 10 is fixedly arranged on the top frame 9, and the movable end is connected to the driving ring 11. The first driving cylinder 10 is uniformly arranged with at least two along the circumference of the top frame 9. During work, the driving ring 11 can be stably pressed down and lifted up, the synchronous movement of each positioning nail 12 is ensured, and the stability of the positioning posture of the positioning frame is ensured, thereby ensuring the consistency of the detection.

[0042] To ensure the accuracy and stability of the provided firing force, the firing device can select a second driving cylinder with stable gas source pressure, which can effectively ensure the stability of the firing force and facilitate automatic control. The gas source pressure can be accurately regulated, and the gas source pressure can be adjusted when the external air pressure changes, so that the pressure difference between the gas source pressure and the external air pressure is kept at a preset value, the actual firing force is stably set at a set value, and the detection accuracy is improved.

[0043] The firing device can also be as shown in the embodiment, and a first spring 3 can be selected to provide the firing force. Correspondingly, the hammer includes a pull rod 2 and a striking rod 5. The bottom end of the pull rod 2 is provided with a partition block 21, and the pull rod 2 is connected to the striking rod 5 through the partition block 21. The striking rod 5 is arranged to be led out from the bottom end of a guide cylinder 1. The top end of the pull rod 2 is arranged to be led out from the top end of the guide cylinder 1, and the top end of the pull rod 2 is provided with a pull ring for pulling the pull rod 2 out to a specified position. The first spring 3 is sleeved on the pull rod 2, and the two ends of the first spring 3 abut against the guide cylinder 1 and the partition block 21, respectively. The guide cylinder 1 is further provided with a buckle 4, and the partition block 21 extends sideways to have a guide block. When the pull rod 2 is pulled out to the specified position, the buckle 4 can be used to clamp the guide block to position the partition block 21 at the specified position, so that the compression amount of the first spring 3 is consistent during each test. When the buckle 4 is released from the guide block, the pull rod 5 can be struck out with a fixed force under the action of the first spring 3, thereby driving the striking rod 5 to impact the detection object with a fixed force.

[0044] In the embodiment, the position sensor is arranged outside the guide cylinder 1, and correspondingly, the guide cylinder 1 is provided with a guide window, the guide block on the partition block 21 is arranged by the guide window, the sensing block 7 of the position sensor is arranged on the guide block, and the sensing strip 8 is arranged outside the guide window and opposite to the sensing block 7. Arranging the position sensor outside the guide cylinder 1 can facilitate maintaining the linear feature of the inner surface of the guide cylinder 1, guarantee the smoothness of the hammer movement, and further guarantee the reliability of the final hammering force.

[0045] In order to guarantee the stability of the movement, in the embodiment, the guide window and the guide block are symmetrically provided with two groups, and correspondingly, the buckle 4 is a symmetric structure. The buckle 4 includes a fixed frame and a movable frame 41. The fixed frame is fixedly arranged on the guide cylinder and includes a first functional segment bent to the position of the guide window, and the first functional segment is provided with a positioning hole. The movable frame 41 is arranged outside the fixed frame and includes a second functional segment bent to the position of the guide window. The second functional segment is provided with a mounting rod. The mounting rod passes through the positioning hole and is arranged to point to the guide window. The end of the mounting rod is provided with a clamping block matched with the guide block. A second spring 42 is sleeved on the mounting rod. The second spring 42 is located between the fixed frame and the movable frame 41 and provides an elastic force pointing to the guide window on the guide cylinder 1. Therefore, by driving the movable frame 41 along the direction of the second spring 4, the clamping block matched with the guide block can be controlled to be close to or away from the lock.

[0046] The guide cylinder 1 is further provided with a spring frame 45. The spring frame 45 is provided with an unlocking button 44. The unlocking button 44 is in contact with the inclined surface of the movable frame 41. When the unlocking button 44 is pressed, the movable frame 41 can be driven to move in the axial direction of the mounting rod away from the guide cylinder 1, so as to release the limiting of the guide block by the clamping block matched with the guide block, and the hammer is fired under the action of the first spring 3.

[0047] In order to facilitate the unlocking operation, in the embodiment, the movable frame 41 is further provided with a pulley 43. The pulley 43 is in contact with the inclined surface of the unlocking button 44. The unlocking operation is smooth and effective.

[0048] In order to avoid the force pushing down the instrument when the unlocking button is pressed, in the embodiment, the guide cylinder 1 is further provided with a handle. The handle is arranged opposite to the unlocking button 44, so as to be operated by one hand. The handle is arranged outside the sensing strip 8 and away from the guide block on the partition block 21. The guide block can be separated from the human hand by the sensing strip 8, so as to avoid the damage of the movement of the guide block to the human body.

[0049] In order to avoid the damage of the rigid impact to the guide cylinder 1, in the embodiment, the third spring is sleeved on the hammer rod. The third spring is arranged between the partition block 21 and the guide cylinder 1, so as to avoid the damage of the rigid hammering of the partition block 21 to the guide cylinder 1, and improve the reliability.

[0050] The concrete strength detector provided by the utility model can be postured by the positioning frame, the perpendicularity of the hammer of the detection module and the surface of the detection object can be guaranteed, the accuracy of detection can be further guaranteed, the consistency of the detection posture is high, the error caused by the posture error between different point detection or detection in sequence can be effectively reduced, and the reliability of detection is further improved.

[0051] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] The above-described embodiments only express several specific implementation manners of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the utility model. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A concrete strength detector, characterized by, The utility model relates to a concrete strength detection instrument, including: Positioning frame and detection module arranged on the positioning frame, The detection module includes guide cylinder, hammer and firing device, the hammer is coaxially nested in the guide cylinder, the guide cylinder and the hammer are provided with position sensor along the axial arrangement, the firing device is fixedly arranged on the guide cylinder, and with the hammer transmission connection, The positioning frame includes the bottom frame that can be combined with the surface of detection object, at least two positioning nails are arranged on the bottom frame along the circumferential direction, the bottom frame is connected with the top frame through the connecting framework, the guide cylinder is vertically fixed on the top frame, so that the hammering end of the hammer is vertically downward.

2. The concrete strength detector of claim 1, wherein The bottom frame includes contact ring, guide ring and drive ring arranged in sequence from bottom to top, The contact ring and the guide ring are fixed on the connecting framework, and the contact ring and the guide ring are respectively provided with guide hole and spiral hole matched in position, The positioning nail is rotatably connected with the drive ring, the positioning nail is provided with spiral groove, and the spiral groove is screw matched with the spiral hole.

3. The concrete strength detector of claim 2, wherein, The positioning frame is also provided with a first driving cylinder, the first driving cylinder is fixedly arranged on the top frame, the movable end is connected to the drive ring, and the first driving cylinder is uniformly provided with at least two along the circumferential direction of the top frame.

4. The concrete strength detector of claim 1, wherein The firing device includes a second driving cylinder.

5. The concrete strength detection instrument of claim 1, wherein The hammer includes a pull rod and a striking rod, the bottom end of the pull rod is provided with a partition block, and the pull rod is connected to the striking rod through the partition block, the striking rod is arranged out of the bottom end of the guide cylinder, the top end of the pull rod is arranged out of the top end of the guide cylinder, and the top end of the pull rod is provided with a pull ring; The firing device includes a first spring, the first spring is sleeved on the pull rod, and the two ends of the first spring are respectively abutted to the guide cylinder and the partition block; The guide cylinder is also provided with a buckle and a guide window, the partition block side also extends a guide block, the guide block is arranged out of the guide window, and can be locked and matched with the buckle.

6. The concrete strength detector of claim 5, wherein, The guide window and the guide block are symmetrically provided with two groups, the buckle includes a fixed frame and a movable frame, The fixed frame is fixedly arranged on the guide cylinder and includes a first functional segment bent to the position of the guide window, and the first functional segment is provided with a positioning hole; The movable frame is arranged outside the fixed frame and includes a second functional segment bent to the position of the guide window, the second functional segment is provided with a mounting rod, the mounting rod passes through the positioning hole and points to the guide window, and the end of the mounting rod is provided with a clamping block that can be locked and matched with the guide block, a second spring is sleeved on the mounting rod, and the second spring is located between the fixed frame and the movable frame; The guide cylinder is also provided with a spring frame, the spring frame is provided with an unlocking button, the unlocking button is in contact with the inclined surface of the movable frame, so that when the unlocking button is pressed, the movable frame can be driven to move away from the guide cylinder along the axial direction of the mounting rod.

7. The concrete strength detector of claim 6, wherein, The active frame is further provided with a pulley, and the pulley is in contact with the unlocking button slope.

8. The concrete strength detector of claim 6, wherein, The guide cylinder is further provided with a handle, and the handle is arranged in alignment with the unlocking button.

9. The concrete strength detector of claim 5, wherein, The striker is further sleeved with a third spring, and the third spring is arranged between the partition block and the guide cylinder.

10. The concrete strength detector of claim 5, wherein, The position sensor comprises an inductive strip and an inductive block, the inductive block is arranged on the guide block, and the inductive strip is arranged outside the guide window and opposite to the inductive block.

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