CN217688393U - Nondestructive detector for strength of lightweight aggregate concrete - Google Patents
Nondestructive detector for strength of lightweight aggregate concrete Download PDFInfo
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- CN217688393U CN217688393U CN202221175764.0U CN202221175764U CN217688393U CN 217688393 U CN217688393 U CN 217688393U CN 202221175764 U CN202221175764 U CN 202221175764U CN 217688393 U CN217688393 U CN 217688393U
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Abstract
The utility model provides a lightweight aggregate concrete intensity nondestructive test ware has solved the present resiliometer to lightweight aggregate concrete intensity detection usefulness, adopts the people's eye to survey when reading the resilience value of impact hammer, leads to the great problem of observation result error. The utility model comprises a resiliometer and a base, wherein an equipment box is arranged on the base, a mobile power supply is arranged in the equipment box, a display screen controller and a display are embedded outside the equipment box, the mobile power supply is electrically connected with the display screen controller, and the display screen controller is connected with the display in a control way; the top of resiliometer is equipped with the lid structure, is equipped with stay cord linear displacement sensor in the lid structure, stay cord linear displacement sensor's stay cord lower extreme and the top releasable connection of the elastic hammer of resiliometer, and stay cord linear displacement sensor is connected with the display screen controller electricity.
Description
Technical Field
The utility model relates to a concrete strength detects technical field, especially indicates a lightweight aggregate concrete strength nondestructive test ware.
Background
As is well known, the strength and quality of concrete are related to the overall safety and service life of a building structure, and therefore, it is very important to perform quality control, quality supervision and quality detection on concrete in the whole life cycle of the building. The springback method is widely applied to construction engineering due to simple operation, convenient use, economy, rapidness and quite high detection precision.
In recent years, lightweight aggregate concrete has been widely used in various fields of construction engineering due to its characteristics of light weight, high strength, good heat insulation effect, excellent fire resistance and durability, and the like. At present, lightweight aggregate concrete has become an important concrete building material.
At present, the resiliometer for detecting the strength of lightweight aggregate concrete has the following defects: human eye observation is mostly adopted when the rebound value of the elastic hammer is read, and the observation time node is relative to the rebound peak value node, and is either advanced by a certain amount of time or lagged by a certain amount of time, so that the observation result error is large.
SUMMERY OF THE UTILITY MODEL
In order to solve the present resiliometer to lightweight aggregate concrete strength detection usefulness that exists among the background art, adopt the human eye to survey when reading the resilience value of impact hammer many, lead to the great problem of observation result error, the utility model provides a lightweight aggregate concrete strength nondestructive test ware.
The technical scheme of the utility model is that: a nondestructive detector for the strength of lightweight aggregate concrete comprises a resiliometer and a base, wherein an equipment box is arranged on the base, a mobile power supply is arranged in the equipment box, a display screen controller and a display are embedded outside the equipment box, the mobile power supply is electrically connected with the display screen controller, and the display screen controller is in control connection with the display;
the rebound tester comprises a vertically through cylinder body, the lower end of the cylinder body is provided with a bouncing rod which can move up and down and automatically reset, and the lower end of the bouncing rod can penetrate out of the cylinder body;
the cylinder body is internally provided with a spring hammer which can move up and down and is used for doing free-falling motion in the cylinder body so as to hammer the upper end of the spring rod;
the outer wall of the cylinder body is provided with a sliding groove which extends along the vertical direction and is through inside and outside, a sliding block is arranged in the sliding groove in a sliding manner, and the sliding block is fixedly connected with the elastic hammer;
the top of barrel is equipped with the lid structure, is equipped with stay cord linear displacement sensor in the lid structure, and stay cord linear displacement sensor is including the stay cord that can stretch out and draw back automatically, the lower extreme of stay cord and the top releasable connection of elastic hammer, and stay cord linear displacement sensor is connected with the display screen controller electricity.
Preferably, a fixing plate is fixedly arranged in the cylinder body, one end of the fixing plate, far away from the straight cylinder, is fixedly connected with the upper end of a central guide rod, and the central guide rod extends along the vertical direction;
the inside of elastic hammer is equipped with through shaft hole from top to bottom, and central guide arm wears to establish in the shaft hole.
Preferably, a hollow column block is fixedly arranged at the top of the elastic hammer, a limit ring plate is fixedly arranged at the top of the hollow column block, and the hollow column block and the limit ring plate are both slidably sleeved on the central guide rod;
the diameter of the hollow column block is smaller than the outer diameter of the limit ring plate, so that an annular groove can be formed between the limit ring plate and the elastic hammer;
a spring limiting rod piece penetrates through the upper part of the barrel body, the spring limiting rod piece is perpendicular to the central guide rod, the spring limiting rod piece can move on the barrel body along the axis direction of the spring limiting rod piece and automatically reset, and the spring limiting rod piece is positioned below the fixing plate;
the spring limit rod piece can be inserted into the annular groove towards one end of the central guide rod to position the elastic hammer.
Preferably, the spring limiting rod piece comprises an arc-shaped clamping plate clamped on the hollow column block, the arc-shaped clamping plate is fixedly connected with one end of the connecting rod, the other end of the connecting rod penetrates out of the barrel, and the other end of the connecting rod is fixedly connected with the limiting plate;
a return spring is sleeved on the connecting rod, one end of the return spring is fixedly connected with the outer side wall of the barrel, and the other end of the return spring is fixedly connected with the limiting plate;
and a pull handle is fixedly arranged on one side of the limiting plate, which is far away from the barrel body.
Preferably, the top of the limit ring plate is fixedly provided with a drag hook, the lower end of the pull rope is fixedly provided with a pull ring, and the pull ring is hung on the drag hook.
Preferably, the barrel comprises a straight barrel and a frustum arranged at the lower end of the straight barrel, the frustum is of a structure with a wide upper part and a narrow lower part, a first slotted hole with an upper opening is formed in the frustum, and the first slotted hole is communicated with the inside of the straight barrel; the inner diameter of the first slotted hole is smaller than that of the straight cylinder, so that a first blocking edge is formed at the upper end of the frustum and used for blocking the drop of the elastic hammer;
the lower end of the frustum is provided with a through hole which is through up and down, and the inner diameter of the through hole is smaller than that of the first slotted hole, so that the lower end of the frustum forms a second blocking edge;
the bouncing rod comprises a rod body extending along the vertical direction, the rod body penetrates through the first groove hole and the through hole, the length of the rod body is greater than the sum of the depths of the through hole and the first groove hole, a second groove hole with an upper opening is formed in the rod body, and a buffer spring is fixedly arranged at the groove bottom of the second groove hole;
the lower end of the central guide rod is inserted into the second slot hole and is fixedly connected with the upper end of the buffer spring;
the top of the rod body is fixedly provided with an annular convex edge, the annular convex edge is sleeved on the central guide rod, the outer diameter of the annular convex edge is equal to the inner diameter of the first slotted hole, the lower part of the annular convex edge is fixedly provided with a spring striking tension spring, and the lower end of the spring striking tension spring is fixedly connected with the second retaining edge.
Preferably, the cover body structure comprises a mounting seat and a sealing cover, the mounting seat can be detachably arranged at the top of the barrel, a sensor mounting groove is formed in the mounting seat, the lower part of the sensor mounting groove is communicated with the inside of the barrel, the stay cord linear displacement sensor is arranged in the sensor mounting groove, and a stay cord enters the barrel from an opening at the lower part of the sensor mounting groove;
the detachable top at the mount pad of establishing of closing cap, stay cord linear displacement sensor are located the inside of closing cap, offer inside and outside penetrating wire guide on the closing cap, and stay cord linear displacement sensor passes the wire guide with the connecting wire of display screen controller.
Preferably, a resiliometer support is fixedly arranged on the base, a horizontally arranged second adjusting rod is fixedly arranged on the resiliometer support, the second adjusting rod is of a telescopic rod structure with adjustable length, and one end of the second adjusting rod is fixedly provided with a hoop which is sleeved on the barrel;
an avoiding opening is formed in the embracing ring and used for avoiding the sliding groove;
a through second internal thread hole is formed in the hoop, a second positioning screw matched with the threads is arranged in the second internal thread hole, and one end of the second positioning screw is used for abutting against the cylinder body to fix the resiliometer;
when the second adjustment bar is extended, the resiliometer is able to translate to the exterior of the base.
Preferably, the second adjusting rod comprises a sleeve and an inserting rod movably inserted in the sleeve, a first internal thread hole which is internally and externally permeable is formed in the side wall of the sleeve, a first positioning screw rod matched with the first internal thread hole is arranged in the first internal thread hole, and the first positioning screw rod is used for tightly fixing the inserting rod in the sleeve.
Preferably, the resiliometer support comprises a telescopic rod and a first adjusting rod which are vertically and fixedly arranged on the base, and the upper end of the telescopic rod is fixedly connected with the sleeve;
the first adjusting rod comprises two lead screws and a screw cylinder which is in threaded connection with the two lead screws, the upper end of the upper lead screw is fixedly connected with the sleeve, and the first adjusting rod is used for adjusting the length of the elastic striking rod which is retracted into the cylinder when the elastic striking rod abuts against the ground.
The utility model has the advantages that: this device is when using the resiliometer to measure the concrete intensity, and stay cord linear displacement sensor transmits the display screen controller with the displacement volume signal real-time transmission of percussion hammer, and the display screen controller transmits the displacement volume signal for the display in real time, and the display screen controller shows the displacement volume signal with the form of two-dimensional coordinate curve on the display.
After the experiment is completed, an operator reads the wave peak value of the first wave peak and the wave trough value of the first wave trough of the two-dimensional coordinate curve, the two wave peak values and the wave trough values are subtracted, the resilience value of the experiment can be obtained, and the strength of the lightweight aggregate concrete can be estimated according to the relevance between the resilience value and the compressive strength of the lightweight aggregate structural concrete.
This device can be with the displacement volume data of the impact hammer of experimentation with two-dimensional coordinate curve show on the display directly perceivedly, the operator of being convenient for observes directly perceivedly to can avoid the produced error of people's eye observation rebound value, measuring result is more accurate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a main viewing angle in embodiment 1;
FIG. 2 is a schematic structural view of a front view angle in embodiment 2;
FIG. 3 is a schematic diagram of the construction of the resiliometer of FIG. 1;
FIG. 4 is a schematic view of the internal structure of FIG. 3;
FIG. 5 is a schematic view of the connection between the upper cover and the pull-cord linear displacement sensor of FIG. 4;
FIG. 6 is an enlarged view of the structure at A in FIG. 4;
FIG. 7 is a schematic structural view of the spring-limiting rod of FIG. 4;
FIG. 8 is a schematic top view of the arc-shaped clamping plate and the connecting rod shown in FIG. 7;
in the figure, 1, a base, 2, an equipment box, 3, a display screen controller, 4, a telescopic rod, 5, a first adjusting rod, 6, a second adjusting rod, 7, a first positioning screw rod, 8, a hoop, 9, a second positioning screw rod, 10, a barrel, 11, a sliding chute, 12, a bouncing hammer, 1201, a hollow column block, 1202, a limit ring plate, 1203, a draw hook, 13, a sliding block, 14, a bouncing rod, 1401, an annular convex edge, 15, a spring limit rod piece, 1501, an arc-shaped clamping plate, 1502, a connecting rod, 1503, a reset spring, 1504, a limiting plate, 1505, a pull handle, 16, a mounting seat, 1601, an annular groove, 17, a sealing cover, 1701, a wire guide hole, 18, a central guide rod, 19, a fixing plate, 20, a buffer spring, 21, a bouncing pull ring, 22, a pull rope linear displacement sensor, 23, a pull rope, 24, 25 and a display.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.
Example 1: the utility model provides a nondestructive test ware of lightweight aggregate concrete intensity, as shown in figure 1, includes resiliometer and base 1, is equipped with equipment box 2 on the base 1, is equipped with portable power source in the equipment box 2, and display screen controller 3 and display 25 are inlayed to the outside of equipment box 2, and portable power source is connected with display screen controller 3 electricity, display screen controller 3 and display 25 control connection.
As shown in fig. 3 and 4, the resiliometer includes a vertically through cylinder 10, a striking rod 14 capable of moving up and down and automatically returning is disposed at the lower end of the cylinder 10, and the lower end of the striking rod 14 can penetrate out of the cylinder 10.
A fixing plate 19 is fixedly arranged in the cylinder body 10, one end, far away from the straight cylinder, of the fixing plate 19 is fixedly connected with the upper end of a central guide rod 18, and the central guide rod 18 extends in the vertical direction.
The cylinder 10 is provided with a flexible hammer 12, the interior of the flexible hammer 12 is provided with a through shaft hole, and the central guide rod 18 is arranged in the shaft hole. The tapping hammer 12 is adapted to make a free-fall motion within the barrel 10 along the central guide bar 18 to hammer the upper end of the tapping rod 14.
The outer wall of the cylinder 10 is provided with a sliding groove 11 which extends along the vertical direction and is through inside and outside, a sliding block 13 is arranged in the sliding groove 11 in a sliding manner, and the sliding block 13 is fixedly connected with the elastic hammer 12.
As shown in fig. 4 and 6, a hollow cylindrical block 1201 is fixedly disposed on the top of the impact hammer 12, a stop ring plate 1202 is fixedly disposed on the top of the hollow cylindrical block 1201, and both the hollow cylindrical block 1201 and the stop ring plate 1202 are slidably sleeved on the central guide rod 18.
The diameter of the hollow cylindrical block 1201 is smaller than the outer diameter of the retainer ring plate 1202 to enable an annular groove to be formed between the retainer ring plate 1202 and the hammer 12.
The top of the limit ring plate 1202 is fixedly provided with a draw hook 1203.
The upper part of the cylinder 10 is penetrated with a spring limiting rod piece which is vertical to the central guide rod 18, the spring limiting rod piece can move on the cylinder 10 along the axis direction and automatically reset, and the spring limiting rod piece is positioned below the fixing plate 19.
The end of the spring retainer bar facing the center guide bar 18 can be inserted into the annular groove to position the hammer 12.
As shown in fig. 7 and 8, the spring limiting rod includes an arc-shaped clamping plate 1501 for clamping on the hollow column 1201, the arc-shaped clamping plate 1501 is fixedly connected to one end of the connecting rod 1502, the other end of the connecting rod 1502 penetrates through the barrel 10, and the other end of the connecting rod 1502 is fixedly connected to the limiting plate 1504.
The connecting rod 1502 is sleeved with a return spring 1503, one end of the return spring 1503 is fixedly connected with the outer side wall of the barrel 10, and the other end of the return spring 1503 is fixedly connected with the limiting plate 1504.
A pull handle 1505 is fixedly arranged on one side of the limiting plate 1504 away from the cylinder 10.
The top of barrel 10 is equipped with the lid structure, as shown in fig. 4 and 5, the lid structure includes mount pad 16 and closing cap 17, the removable top of establishing at barrel 10 of mount pad 16, be equipped with the sensor mounting groove in the mount pad 16, the lower part of sensor mounting groove and the inside intercommunication of barrel 10, be equipped with stay cord linear displacement sensor 22 in the sensor mounting groove, stay cord linear displacement sensor 22 is including the stay cord 23 that can stretch out and draw back automatically, stay cord 23 gets into in the barrel 10 from the lower part opening part of sensor mounting groove, the lower extreme of stay cord 23 is equipped with pull ring 24, as shown in fig. 6, pull ring 24 hangs on pull hook 1203.
The detachable top of establishing at mount pad 16 of closing cap 17, stay cord linear displacement sensor 22 are located the inside of closing cap 17, offer inside and outside penetrating wire guide 1701 on the closing cap 17, stay cord linear displacement sensor 22 is connected with display screen controller 3 electricity, and stay cord linear displacement sensor 22 passes wire guide 1701 with the connecting wire of display screen controller 3.
The barrel 10 comprises a straight barrel and a frustum arranged at the lower end of the straight barrel, the frustum is of a structure with a wide upper part and a narrow lower part, a first slotted hole with an upper opening is formed in the frustum, and the first slotted hole is communicated with the inside of the straight barrel. The inner diameter of the first slot is smaller than the inner diameter of the straight cylinder, so that a first blocking edge is formed at the upper end of the frustum, and the first blocking edge is used for blocking the drop of the elastic hammer 12.
The lower extreme of frustum is equipped with upper and lower penetrating through-hole, and the internal diameter of through-hole is less than the internal diameter of first slotted hole to the lower extreme of messenger's frustum goes out to form the second and keeps off along.
The striking rod 14 includes the body of rod that extends along upper and lower direction, and the body of rod is worn to establish in first slotted hole and the through-hole, and the length of the body of rod is greater than the hole depth sum of through-hole and first slotted hole, and the inside of the body of rod is equipped with the second slotted hole of open-ended, and the tank bottom department of second slotted hole is fixed and is equipped with buffer spring 20.
The lower end of the center guide rod 18 is inserted into the second slot hole, and the lower end of the center guide rod 18 is fixedly connected with the upper end of the buffer spring 20.
The top of the rod body is fixedly provided with an annular convex edge 1401, the annular convex edge 1401 is sleeved on the central guide rod 18, the outer diameter of the annular convex edge 1401 is equal to the inner diameter of the first slotted hole, the lower part of the annular convex edge 1401 is fixedly provided with a spring impact tension spring 21, and the lower end of the spring impact tension spring 21 is fixedly connected with the second retaining edge.
In order to avoid when direct handheld resiliometer of operating personnel measures, because the vibrations of health lead to measuring error's appearance, as shown in fig. 1, this embodiment is fixed to be equipped with the resiliometer support on base 1, and the fixed second that is equipped with the level setting on the resiliometer support is adjusted pole 6, and the second is adjusted pole 6 and is length-adjustable's telescopic rod structure.
The second is adjusted pole 6 and is included the sleeve pipe and the activity is inserted and is established the inserted bar in the sleeve pipe, has seted up inside and outside penetrating first internal thread hole on the sheathed tube lateral wall, and first internal thread downthehole first positioning screw 7 that is equipped with the looks adaptation, first positioning screw 7 are used for fixing the inserted bar top tightly in the sleeve pipe, prevent that the resiliometer from pushing the inserted bar lateral shifting under the effect of external force, lead to measuring error.
One end of the inserted bar, which is far away from the sleeve, is fixedly provided with an embracing ring 8, and the embracing ring 8 is sleeved on the barrel body 10.
An avoiding opening is formed in the hoop 8 and used for avoiding the sliding groove 11.
Be equipped with penetrating second internal thread hole on the armful ring 8, the downthehole second positioning screw 9 that is equipped with the screw thread adaptation of second internal thread, the one end of second positioning screw 9 is used for leaning on in order to fix the resiliometer on barrel 10.
When the second adjustment bar 6 is extended, the resiliometer can be translated to the outside of the base 1.
As shown in fig. 1, in order to finely adjust the length of the retractable cylinder 10 when the tapping rod 14 abuts against the ground more accurately during measurement and to keep the adjusted tapping rod 14 stable, the bracket of the resiliometer in this embodiment includes a telescopic rod 4 and a first adjusting rod 5 which are vertically and fixedly arranged on the base 1, and the upper end of the telescopic rod 4 is fixedly connected with the casing.
The first adjusting rod 5 comprises two screw rods and a screw cylinder which is in threaded connection with the two screw rods, the upper end of the upper screw rod is fixedly connected with the sleeve, and the first adjusting rod 5 is used for adjusting the length of the elastic striking rod 14 which retracts into the cylinder 10 when the elastic striking rod abuts against the ground.
The embodiment is suitable for detecting the concrete layer surface in the horizontal state formed by pouring the lightweight aggregate concrete, such as a concrete road surface, an indoor ground surface and the like.
In this embodiment, the signal transmission principle and the connection method of the displacement sensor, the display screen controller and the display belong to the prior art in the technical field of sensor-controller-display, and the technology is disclosed in the publication 2015108329308.
The working principle is as follows: when measuring, operating personnel pulls out the resiliometer from the top of bottom plate 1, then screws up first positioning screw 7, prevents that the resiliometer from pushing away inserted bar lateral shifting under the effect of external force, leads to measuring the error.
Then loosen the second positioning adjusting screw 9, adjust the upper and lower position of the resiliometer in the embracing ring 8, make the lower extreme of the bouncing rod 14 lean against the horizontal surface of the concrete layer when in the initial state, then tighten the second positioning adjusting screw 9, prevent the cylinder 10 of the resiliometer from moving up and down when measuring, and cause errors.
Then, the length of the first adjusting rod 5 is adjusted by rotating the screw cylinder, so that the lower end faces of the cylinder 10 and the bouncing rod 14 simultaneously abut against the horizontal surface of the concrete layer, and the adjusting work before measurement is completed at the moment.
Then open display screen controller 3 and display 25, stay cord line displacement sensor 22 transmits the displacement volume signal of rapping hammer 12 display screen controller 3 in real time, display screen controller 3 transmits the displacement volume signal to display 25 in real time, display screen controller 3 shows the displacement volume signal with the form of two-dimensional coordinate curve on display 25, because rapping hammer 12 is blocked at initial position by the spacing member bar of spring this moment, consequently the displacement volume curve that shows on display 25 this moment becomes 0 scale rectilinear state and extends.
The spring limit rod clamp is pulled out, so that the arc-shaped clamping plate 1501 is separated from the elastic hammer 12, the elastic hammer 12 freely falls along the central guide rod 18 under the self weight of the elastic hammer 12, at the moment, the displacement curve displayed on the display 25 is rapidly inclined and ascended until the elastic hammer 12 impacts the top of the elastic rod 14, the lower end of the elastic rod 14 impacts the concrete surface under the impact of the elastic hammer 12, the concrete surface is locally deformed under the impact of the elastic rod 14, the elastic tension spring 21 is compressed, the buffer spring 20 is stretched, then the elastic rod 14 moves upwards under the action of the elastic tension spring 21 and the buffer spring 20 to reset, at the moment, the elastic rod 14 pushes the elastic hammer 12 to move upwards, the displacement curve displayed on the display 25 starts to sharply reducing to the inclined descending trend, a first peak is formed, and under the action of the oscillation principle, the displacement curve displayed on the display 25 presents a plurality of peaks. The trough tends to a straight line state again.
The peak value of the first peak and the trough value of the first trough are recorded, the two values are subtracted, the resilience value of the experiment can be obtained, and the strength of the lightweight aggregate concrete can be estimated according to the correlation between the resilience value and the compressive strength of the lightweight aggregate structural concrete.
After the first experiment is completed, the striking hammer 12 is reset.
When the second experiment is started, the wire barrel is rotated, the length of the first adjusting rod 5 is adjusted, the barrel body 10 is lifted for a certain distance, the lower part of the elastic striking rod 14 is exposed out of the barrel body 10 for a certain length when the experiment is started, the distance between the lower end face of the elastic striking hammer 12 and the upper end of the elastic striking rod 14 is shortened, the free falling time of the elastic striking hammer 12 is shortened, and the impact force of the elastic striking hammer 12 on the elastic striking rod 14 is reduced. And repeating the steps to obtain second experimental data.
According to the steps, multiple groups of control experiment data can be obtained, so that the control analysis can be conveniently carried out on the measurement results.
Example 2: a nondestructive detector for the strength of lightweight aggregate concrete is shown in figure 2, and in the embodiment, a base 1 is not provided with a resiliometer bracket, a second adjusting rod 6 and a hoop 8. During testing, an operator needs to hold the resiliometer for measurement. The other structure is the same as embodiment 1.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. The utility model provides a nondestructive test of lightweight aggregate concrete intensity which characterized in that: the portable electronic rebound tester comprises a resiliometer and a base (1), wherein an equipment box (2) is arranged on the base (1), a mobile power supply is arranged in the equipment box (2), a display screen controller (3) and a display (25) are embedded outside the equipment box (2), the mobile power supply is electrically connected with the display screen controller (3), and the display screen controller (3) is in control connection with the display (25);
the resiliometer comprises a vertically through cylinder body (10), the lower end of the cylinder body (10) is provided with a bouncing rod (14) which can move up and down and automatically reset, and the lower end of the bouncing rod (14) can penetrate out of the cylinder body (10);
the cylinder (10) is internally provided with a bounce hammer (12) which can move up and down, and the bounce hammer (12) is used for doing free falling motion in the cylinder (10) so as to hammer the upper end of a bounce rod (14);
the outer wall of the cylinder body (10) is provided with a sliding chute (11) which extends along the vertical direction and is through from inside to outside, a sliding block (13) is arranged in the sliding chute (11) in a sliding mode, and the sliding block (13) is fixedly connected with the elastic hammer (12);
the top of barrel (10) is equipped with the lid structure, is equipped with stay cord linear displacement sensor (22) in the lid structure, and stay cord linear displacement sensor (22) are including stay cord (23) that can stretch out and draw back automatically, the lower extreme of stay cord (23) and the top releasable connection of elastic hammer (12), and stay cord linear displacement sensor (22) are connected with display screen controller (3) electricity.
2. The nondestructive detector of lightweight aggregate concrete strength of claim 1, characterized in that: a fixing plate (19) is fixedly arranged in the cylinder body (10), one end of the fixing plate (19) far away from the straight cylinder is fixedly connected with the upper end of a central guide rod (18), and the central guide rod (18) extends along the vertical direction;
the interior of the elastic hammer (12) is provided with a through shaft hole, and a central guide rod (18) is arranged in the shaft hole in a penetrating way.
3. The nondestructive detector of lightweight aggregate concrete strength of claim 2, wherein: a hollow column block (1201) is fixedly arranged at the top of the elastic striking hammer (12), a limit ring plate (1202) is fixedly arranged at the top of the hollow column block (1201), and the hollow column block (1201) and the limit ring plate (1202) are both sleeved on the central guide rod (18) in a sliding manner;
the diameter of the hollow column block (1201) is smaller than the outer diameter of the limit ring plate (1202) so that an annular groove can be formed between the limit ring plate (1202) and the impact hammer (12);
a spring limiting rod piece penetrates through the upper part of the barrel body (10), the spring limiting rod piece is perpendicular to the central guide rod (18), the spring limiting rod piece can move on the barrel body (10) along the axis direction of the spring limiting rod piece and automatically reset, and the spring limiting rod piece is positioned below the fixing plate (19);
one end of the spring limiting rod piece facing the central guide rod (18) can be inserted into the annular groove to position the elastic striking hammer (12).
4. A nondestructive detector of lightweight aggregate concrete strength as recited in claim 3, wherein: the spring limiting rod comprises an arc-shaped clamping plate (1501) clamped on the hollow column block (1201), the arc-shaped clamping plate (1501) is fixedly connected with one end of a connecting rod (1502), the other end of the connecting rod (1502) penetrates through the barrel body (10), and the other end of the connecting rod (1502) is fixedly connected with a limiting plate (1504);
a return spring (1503) is sleeved on the connecting rod (1502), one end of the return spring (1503) is fixedly connected with the outer side wall of the barrel (10), and the other end of the return spring (1503) is fixedly connected with the limiting plate (1504);
a pull handle (1505) is fixedly arranged on one side of the limit plate (1504) far away from the cylinder body (10).
5. A nondestructive detector for the strength of lightweight aggregate concrete according to claim 3 or 4, wherein: the top of the limit ring plate (1202) is fixedly provided with a draw hook (1203), the lower end of the pull rope (23) is fixedly provided with a pull ring (24), and the pull ring (24) is hung on the draw hook (1203).
6. A non-destructive detector of the strength of lightweight aggregate concrete according to any one of claims 1 to 4, characterized in that: the barrel (10) comprises a straight barrel and a frustum arranged at the lower end of the straight barrel, the frustum is of a structure with a wide upper part and a narrow lower part, a first slotted hole with an upper opening is formed in the frustum, and the first slotted hole is communicated with the inside of the straight barrel; the inner diameter of the first slotted hole is smaller than that of the straight cylinder, so that a first blocking edge is formed at the upper end of the frustum and used for blocking the falling of the elastic hammer (12);
the lower end of the frustum is provided with a through hole which is through up and down, and the inner diameter of the through hole is smaller than that of the first slotted hole, so that the lower end of the frustum forms a second blocking edge;
the bouncing rod (14) comprises a rod body extending along the vertical direction, the rod body penetrates through the first groove hole and the through hole, the length of the rod body is larger than the sum of the hole depths of the through hole and the first groove hole, a second groove hole with an upper opening is formed in the rod body, and a buffer spring (20) is fixedly arranged at the groove bottom of the second groove hole;
the lower end of the central guide rod (18) is inserted into the second slotted hole and extends into the second slotted hole, and the lower end of the central guide rod (18) is fixedly connected with the upper end of the buffer spring (20);
the top of the rod body is fixedly provided with an annular convex edge (1401), the annular convex edge (1401) is sleeved on the central guide rod (18), the outer diameter of the annular convex edge (1401) is equal to the inner diameter of the first slotted hole, the lower part of the annular convex edge (1401) is fixedly provided with a spring impact tension spring (21), and the lower end of the spring impact tension spring (21) is fixedly connected with the second blocking edge.
7. A non-destructive detector of the strength of lightweight aggregate concrete according to any one of claims 1 to 4, characterized in that: the cover body structure comprises a mounting seat (16) and a sealing cover (17), the mounting seat (16) is detachably arranged at the top of the barrel body (10), a sensor mounting groove is formed in the mounting seat (16), the lower portion of the sensor mounting groove is communicated with the inside of the barrel body (10), a pull rope linear displacement sensor (22) is arranged in the sensor mounting groove, and a pull rope (23) enters the barrel body (10) from an opening at the lower portion of the sensor mounting groove;
the detachable top of establishing at mount pad (16) of closing cap (17), stay cord linear displacement sensor (22) are located the inside of closing cap (17), set up inside and outside penetrating wire guide (1701) on closing cap (17), and the connecting wire of stay cord linear displacement sensor (22) and display screen controller (3) passes wire guide (1701).
8. A non-destructive detector of the strength of lightweight aggregate concrete according to any one of claims 1 to 4, characterized in that: a resiliometer bracket is fixedly arranged on the base (1), a horizontally arranged second adjusting rod (6) is fixedly arranged on the resiliometer bracket, the second adjusting rod (6) is of a telescopic rod structure with adjustable length, one end of the second adjusting rod (6) is fixedly provided with a hoop (8), and the hoop (8) is used for being sleeved on the barrel (10);
an avoiding opening is formed in the embracing ring (8) and used for avoiding the sliding groove (11);
a through second internal thread hole is formed in the hoop (8), a second positioning screw (9) with matched threads is arranged in the second internal thread hole, and one end of the second positioning screw (9) is used for abutting against the barrel (10) to fix the resiliometer;
when the second adjusting rod (6) extends, the resiliometer can translate to the outside of the base (1).
9. The nondestructive detector of lightweight aggregate concrete strength of claim 8, wherein: the second adjusting rod (6) comprises a sleeve and an inserting rod movably inserted in the sleeve, an inner and outer penetrating first internal thread hole is formed in the side wall of the sleeve, a first positioning screw rod (7) matched with the first internal thread hole is arranged in the first internal thread hole, and the first positioning screw rod (7) is used for tightly fixing the inserting rod in the sleeve.
10. The nondestructive detector for the strength of lightweight aggregate concrete according to claim 9, wherein: the resiliometer support comprises a telescopic rod (4) and a first adjusting rod (5) which are vertically and fixedly arranged on the base (1), and the upper end of the telescopic rod (4) is fixedly connected with the sleeve;
the first adjusting rod (5) comprises two screw rods and a screw cylinder which is in threaded connection with the two screw rods, the upper end of the upper screw rod is fixedly connected with the sleeve, and the length of the elastic striking rod (14) which is retracted into the cylinder body (10) when the elastic striking rod abuts against the ground is adjusted by the first adjusting rod (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221175764.0U CN217688393U (en) | 2022-05-17 | 2022-05-17 | Nondestructive detector for strength of lightweight aggregate concrete |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221175764.0U CN217688393U (en) | 2022-05-17 | 2022-05-17 | Nondestructive detector for strength of lightweight aggregate concrete |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117990484B (en) * | 2024-04-02 | 2024-06-07 | 奥来国信（北京）检测技术有限责任公司 | Device and method for automatically detecting concrete strength by rebound method |
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2022
- 2022-05-17 CN CN202221175764.0U patent/CN217688393U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117990484B (en) * | 2024-04-02 | 2024-06-07 | 奥来国信（北京）检测技术有限责任公司 | Device and method for automatically detecting concrete strength by rebound method |
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Address after: No. 01, Building 34, No. 228 West Fourth Ring Road, High tech Industrial Development Zone, Zhengzhou City, Henan Province, 450000 Patentee after: Henan Hengjian Testing Co.,Ltd. Address before: Room 01, building 32, enterprise park, 228 West Fourth Ring Road, high tech Industrial Development Zone, Zhengzhou City, Henan Province, 450000 Patentee before: Henan Zhongjian Engineering Testing Co.,Ltd. |