Steel bar connection state detection system

Abstract

The utility model discloses a reinforcing steel bar connection state detection system which comprises a reinforcing steel bar connection state detection device which comprises a reinforcing steel bar connection structure composed of a reinforcing steel bar threaded sleeve and reinforcing steel bars in threaded connection with the two ends of the reinforcing steel bar threaded sleeve. The resistance tester is connected in parallel between reinforcing steel bars at two ends of a reinforcing steel bar threaded sleeve of the reinforcing steel bar connecting structure, and the reinforcing steel bar connecting structure and the resistance tester form a resistance detection loop; in the resistance detection loop, a resistance tester detects a standard resistance value interval range of a resistance value between two steel bars which are in threaded connection in the steel bar threaded sleeve in a standard resistance meter so as to judge the steel bar connection state of the steel bar connection structure. The device can accurately judge the steel bar connection state of the steel bar connection structure composed of the steel bar threaded sleeve and the steel bars in threaded connection with the two ends of the steel bar threaded sleeve, guidance is provided for steel bar connection construction, and potential safety hazards caused by unreliable connection of the steel bars are eliminated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of building engineering, especially a reinforcing steel bar connecting state detection system. BACKGROUND

[0002] In building engineering, two reinforcing steel bars are usually connected as a whole through reinforcing steel bar threaded sleeve. The connecting state of the two reinforcing steel bars in the reinforcing steel bar sleeve includes three states of not being tightened, being partially tightened and being completely tightened. In order to ensure the reliability of the connection of the two reinforcing steel bars through the reinforcing steel bar threaded sleeve, the connecting state of the two reinforcing steel bars in the reinforcing steel bar threaded sleeve needs to be detected to determine the reliability of the connection of the two reinforcing steel bars through the reinforcing steel bar threaded sleeve. In the field, a go-no-go gauge, exposed thread of sleeve reinforcing steel bar and torque wrench are usually used for comprehensive determination. The go-no-go gauge only checks the machining accuracy of the thread, and the exposed thread and torque wrench only look at the appearance and cannot accurately determine the connecting state of the two reinforcing steel bars in the reinforcing steel bar threaded sleeve. SUMMARY

[0003] The utility model discloses a reinforcing steel bar connecting state detection system to solve the problems of low detection accuracy or inability to detect the reinforcing steel bar connecting state of the reinforcing steel bar connecting structure composed of the reinforcing steel bar threaded sleeve and two reinforcing steel bar threads in the prior art.

[0004] In order to solve the above technical problems, the utility model provides a technical scheme of a reinforcing steel bar connecting state detection system, which comprises a reinforcing steel bar connecting state detection device, the reinforcing steel bar connecting state detection device comprises a reinforcing steel bar connecting structure composed of a reinforcing steel bar threaded sleeve and two reinforcing steel bars connected by threads at both ends of the reinforcing steel bar threaded sleeve, further comprises a resistance tester connected in parallel between the reinforcing steel bars at both ends of the reinforcing steel bar threaded sleeve of the reinforcing steel bar connecting structure, and the reinforcing steel bar connecting structure and the resistance tester constitute a resistance detection loop. In the resistance detection loop, the resistance value between the two reinforcing steel bars connected by threads in the reinforcing steel bar threaded sleeve is detected by the resistance tester to determine the reinforcing steel bar connecting state of the reinforcing steel bar connecting structure in the standard resistance value interval range in the standard resistance table.

[0005] Further, the reinforcing steel bar connecting state detection system provided by the utility model has the advantages that the two connecting ends of the resistance tester are connected between each reinforcing steel bar and the end of the reinforcing steel bar threaded sleeve on the same side, and the distance between them is equal.

[0006] Further, the reinforcing steel bar connecting state detection system provided by the utility model further comprises a standard resistance table acquisition device for acquiring resistance values to form a standard resistance table, and the standard resistance table acquisition device comprises:

[0007] A first acquisition unit is arranged to acquire the standard resistance value interval range of the reinforcing steel bar connecting state being in the not-tightened state.

[0008] The second acquisition unit is used for acquiring a standard resistance value interval range of a reinforcing steel bar connection state being in a tight state.

[0009] Further, the steel bar connection state detection system provided by the utility model,

[0010] The first acquisition unit is the resistance detection circuit of the multiple groups of reinforcing steel bars in the untight state, and the average value of the resistance values of the reinforcing steel bar connection structures connected by the resistance tester in the full-group resistance detection circuit and the interval range of the minimum value and the maximum value are detected as the standard resistance value interval range of the untight state.

[0011] The second acquisition unit is the resistance detection circuit of the multiple groups of reinforcing steel bars in the tight state, and the average value of the resistance values of the reinforcing steel bar connection structures connected by the resistance tester in the full-group resistance detection circuit and the interval range of the minimum value and the maximum value are detected as the standard resistance value interval range of the tight state.

[0012] Further, the steel bar connection state detection system provided by the utility model, the first acquisition unit is the resistance detection circuit of more than ten groups of reinforcing steel bars in the untight state, and the third acquisition unit is the resistance detection circuit of more than ten groups of reinforcing steel bars in the tight state.

[0013] Compared with the prior art, the utility model has the beneficial effects as follows:

[0014] The steel bar connection state detection system provided by the utility model mainly comprises a reinforcing steel bar connection structure composed of a reinforcing steel bar threaded sleeve and two reinforcing steel bars threaded connections and a reinforcing steel bar connection state detection device composed of a resistance tester connected in parallel with the reinforcing steel bar connection structure, the resistance value between the two reinforcing steel bars in the reinforcing steel bar threaded sleeve is detected by the resistance tester in the standard resistance value interval range of a standard resistance table, so that the reinforcing steel bar connection state of the reinforcing steel bar connection structure can be determined, the reinforcing steel bar connection state can be accurately determined as being in the untight state, the local tight state or the tight state, the reinforcing steel bar connection of the reinforcing steel bar connection structure can be determined according to the reinforcing steel bar connection state, the reinforcing steel bar connection structure can be guided, the reinforcing steel bar connection quality can be ensured, and the safety hazard of the reinforcing steel bar connection in the untight state or the local tight state can be eliminated. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of the reinforcing steel bar connection state detection system;

[0016] Figure 2 It is a circuit principle view of the equivalent resistance of the reinforcing steel bar connection structure;

[0017] Figure 3 It is a structural schematic view of the standard resistance table acquisition device;

[0018] Figure 4 is a sectional view of the steel bar connection in a partially tightened state;

[0019] shown in the figure:

[0020] 100, steel bar connection state detection system; 110, steel bar connection structure, 111, steel bar, 112, steel bar threaded sleeve; 120, resistance tester, 121, terminal, 122, power interface, 123, data interface, 124, paper ticket outlet, 125, display screen;

[0021] 200, standard resistance table acquisition device; 210, first acquisition unit; 220, second acquisition unit. DETAILED DESCRIPTION

[0022] The utility model will be described in detail below in combination with the drawings: the advantages and characteristics of the utility model will be more clear according to the following description.It should be noted that the drawings are all very simplified and all use non-precise scale, only to facilitate, clear and assist the purpose of explaining the embodiment of the utility model.

[0023] Please refer to Figure 1 The utility model embodiment provides a steel bar connection state detection system, including steel bar connection state detection device 100, steel bar connection state detection device 100 includes the steel bar connection structure 110 that is composed of steel bar threaded sleeve 112 and the steel bar 111 threaded connection at both ends thereof, still includes the resistance tester 120 that is shunted between the steel bar 111 of steel bar threaded sleeve 112 both ends of steel bar connection structure 110, steel bar connection structure 110 and resistance tester 120 constitute resistance detection loop, and the resistance value between the two steel bars 111 threaded connection in steel bar threaded sleeve 112 is detected in resistance detection loop by resistance tester 120 to judge the steel bar 111 connection state of steel bar connection structure 110 in the standard resistance value interval range in standard resistance table.The resistance tester 120 includes but is not limited to portable resistance tester, and it includes the power interface 122 for connecting power cord, the data interface 123 for exporting resistance value data, the paper ticket outlet 124 for outputting current detection result and the display screen 125 for showing the resistance value of current detection result.The display screen 125 can be LED display or hydraulic display.The resistance tester 120 can also be multimeter and other resistance measuring instruments.In the patent, the carbon content of steel bar 111 is lower than that of steel bar threaded sleeve 112, for example: steel bar threaded sleeve 112 uses 45# steel (its carbon content C=0.42%-0.5%), and steel bar 11 uses HRB400 or HRB500 (its carbon content C≤0.25%).

[0024] The steel bar connecting state detection system provided by the utility model mainly comprises a steel bar connecting structure 110 which is composed of a steel bar threaded sleeve 112 and two steel bars 111 which are threadedly connected, and a steel bar connecting state detection device 100 which is composed of a resistance tester 120 which is connected in parallel on the steel bar connecting structure 110 which is composed of the steel bar threaded sleeve 112 and the two steel bars 111 which are threadedly connected, the resistance value between the two steel bars 111 in the steel bar threaded sleeve 112 is detected by the resistance tester 120, and the steel bar connecting state of the steel bar connecting structure 110 is judged according to the standard resistance value interval range in the standard resistance table, so that the steel bar connecting state can be accurately judged as an un-tightening state, a local tightening state or a tightening state, whether the steel bar 111 of the steel bar connecting structure 110 is reliably connected can be judged according to the steel bar connecting state, the construction of the steel bar connecting structure 110 can be guided, the steel bar 111 connecting quality is ensured, and the safety hidden danger that the steel bar is un-reliably connected due to the steel bar connecting state being the un-tightening state or the local tightening state is eliminated.

[0025] Please refer to Figure 2 and Figure 4 , the detection principle of the steel bar connecting state detection device 100 is:

[0026] When the two steels 111 of the steel connecting structure 110 are in the tight state in the steel threaded sleeve 112, the two steels 111 are in the connected state, at this time, the connecting path of the two connected steels 111 is equivalent to the second resistance R2, and the connecting path of the two steels 111 through the steel threaded sleeve 112 is equivalent to the first resistance R1, and the first resistance R1 and the second resistance R2 are in parallel; when the two steels 111 of the steel connecting structure 110 are in the untight state in the steel threaded sleeve 112, the two steels 111 are in the disconnected state, at this time, the connecting path of the two connected steels 111 is blocked, and the second resistance R2 cannot be formed, that is, the second resistance R2 is disconnected; when the two steels 111 of the steel connecting structure 110 are in the horseshoe-shaped local tight state in the steel threaded sleeve 112, the connection state of the two steels 111 exists in two situations of connection or disconnection, when the connection state is connected, it is the tight state; when the connection state is disconnected, it is the untight state. The resistance tester 120 detects the steel connection state of the above steel connecting structure 110 on the construction site according to the Ohm's law, when the second resistance R2 is connected, according to the mathematical expression U=IR of the Ohm's law, the resistance is proportional to the current passing through it and inversely proportional to the voltage, since the first resistance R1 and the second resistance R2 are in parallel, the resistance value detected by the resistance tester 120 is small; when the second resistance R2 is disconnected, only the first resistance R1 is connected, at this time, the resistance value of the first resistance R1 is large, that is, according to the characteristic that the resistance value of the parallel resistance is low, the resistance value of the parallel resistance is greater than the resistance value of any one resistance. Therefore, the resistance value detected by the resistance tester 120 can be used to judge whether the steel connection state of the two steels 111 in the steel threaded sleeve 112 is tight or untight. When the two steels 111 of the steel connecting structure 110 are in the horseshoe-shaped local tight state in the steel threaded sleeve 112, since the connection state of the two steels 111 exists in two situations of connection or disconnection, at this time, the resistance value detected exists in two situations, one is the resistance value close to the tight state, and the other is the resistance value close to the untight state, the two resistance values are both determined as the steel connection state of the two steels 111 in the steel threaded sleeve 112 being in the horseshoe-shaped local tight state.

[0027] In addition, since the carbon content of the steel threaded sleeve 112 is higher than that of the steel 111 threaded thereon, the carbon content is inversely proportional to the conductivity, that is, the increase of the carbon content reduces the conductivity and increases the resistance. Therefore, it can also be detected that when the resistance value is small, the steel connection state is in the tight state; when the resistance value is large, the steel connection state is in the untight state. In order to improve the accuracy of the judgment of the steel connection state, the detected resistance value can be searched in the standard resistance table to determine the resistance value range in which the detected resistance value is located to judge whether the steel connection state of the steel connecting structure 110 is tight or untight.

[0028] Please refer to Figure 1 In order to improve the consistency of detection, the steel bar connection state detection system provided in the utility model embodiment, two wiring ends 121 of the resistance tester 120 are connected between each steel bar 111 and the end of the steel bar threaded sleeve 112 on the side where the steel bar is located, and the distance is equal, which is L.

[0029] Please refer to Figure 3 In order to formulate a standard resistance table according to different steel bar parameters, the steel bar connection state detection system provided in the utility model embodiment further comprises a standard resistance table acquisition device 200 for acquiring resistance values to form a standard resistance table; the standard resistance table acquisition device 200 comprises a first acquisition unit 210 and a second acquisition unit 220, wherein:

[0030] The first acquisition unit 210 is used for acquiring a standard resistance value interval range of the steel bar connection state in the un-tightened state. The first acquisition unit 210 is the resistance detection circuit of a plurality of steel bars in the un-tightened state, and the average value of the resistance values of the steel bar connection structure 110 connected by the resistance tester 120 in the full-group resistance detection circuit and the interval range of the minimum value and the maximum value or the error range thereof are detected as the standard resistance value interval range of the un-tightened state.

[0031] The second acquisition unit 220 is used for acquiring a standard resistance value interval range of the steel bar connection state in the tightened state. The second acquisition unit is the resistance detection circuit of a plurality of steel bars in the tightened state, and the average value of the resistance values of the steel bar connection structure 110 connected by the resistance tester 120 in the full-group resistance detection circuit and the interval range of the minimum value and the maximum value or the error range thereof are detected as the standard resistance value interval range of the tightened state.

[0032] In order to ensure the data accuracy of the resistance standard table, the first acquisition unit 210 can be the resistance detection circuit of more than ten groups of steel bars 111 in the un-tightened state, and the second acquisition unit 220 can be the resistance detection circuit of more than ten groups of steel bars 111 in the local tightened state. However, the above group number is not limited to ten groups, and can be adjusted as needed. The more the number of groups is, the higher the accuracy is.

[0033] When the resistance value detected by the resistance tester 120 is in the standard resistance value interval range of the un-tightened state, it is judged that the steel bar connection state of the steel bar connection structure 110 is in the un-tightened state.

[0034] When the resistance value detected by the resistance tester 120 is in the standard resistance value interval range of the tightened state, it is judged that the steel bar connection state of the steel bar connection structure 110 is in the tightened state.

[0035] When the resistance value detected by the resistance tester 120 is close to the standard resistance value interval range of the top tight state or close to the standard resistance value interval range of the non-top tight state, it is judged that the steel bar connection state of the steel bar connection structure 110 is the horseshoe-shaped local top tight state.

[0036] Of course, in order to realize the judgment of the steel bar connection state of the steel bar connection structure 110 being the horseshoe-shaped local top tight state, a third acquisition unit can also be added for acquiring the standard resistance value interval range of the steel bar connection state being the horseshoe-shaped local top tight state. The three acquisition units are the resistance detection circuits of the multiple groups of steel bars in the horseshoe-shaped local top tight state, and the average value of the resistance values of the steel bar connection structures 110 connected by the resistance tester 120 in the full-group resistance detection circuit and the interval range of the minimum value and the maximum value are detected as the standard resistance value interval range of the top tight state. At this time, when the resistance value detected by the resistance tester 120 is in the standard resistance value interval range of the horseshoe-shaped local top tight state, it is judged that the steel bar connection state of the steel bar connection structure 110 is the horseshoe-shaped local top tight state. The steel bar connection state is judged by the detected resistance value combined with the data in the standard resistance table, which has the advantage of high precision.

[0037] The utility model is not limited to the above-mentioned specific implementation, obviously, the above-mentioned described embodiment is the embodiment of the utility model example part embodiment, but is not all embodiment.Based on the described embodiment of the utility model, all other embodiments obtained by the ordinary skill in the art belong to the range of the utility model protection.The person skilled in the art can make other levels of modification and change to the utility model.Such, if these modifications and changes of the utility model are within the scope of the utility model claims, then the utility model also intends to include these changes and variations.

Claims

1. A rebar connection status detection system, characterized in that, The steel bar connection state detection device comprises a steel bar connection structure composed of a steel bar threaded sleeve and a steel bar threaded connected at both ends of the steel bar threaded sleeve, the carbon content of the steel bar is lower than that of the steel bar threaded sleeve, and further comprises a resistance tester connected in parallel between the steel bar threaded sleeves at both ends of the steel bar connection structure, the steel bar connection structure and the resistance tester form a resistance detection loop, and the resistance value between the two steel bars threaded in the steel bar threaded sleeve is detected by the resistance tester in the resistance detection loop to determine the steel bar connection state of the steel bar connection structure in the standard resistance value interval range in the standard resistance table; and further comprises a standard resistance table acquisition device for acquiring the resistance value to form a standard resistance table. The standard resistance table acquisition device comprises: A first acquisition unit for acquiring a standard resistance value interval range of an un-tightened state of the steel bar connection state; A second acquisition unit for acquiring a standard resistance value interval range of a tightened state of the steel bar connection state; When the resistance value detected by the resistance tester is in the standard resistance value interval range of the un-tightened state, it is determined that the steel bar connection state of the steel bar connection structure is in the un-tightened state; When the resistance value detected by the resistance tester is in the standard resistance value interval range of the tightened state, it is determined that the steel bar connection state of the steel bar connection structure is in the tightened state; When the resistance value detected by the resistance tester is close to the standard resistance value interval range of the tightened state or close to the standard resistance value interval range of the un-tightened state, it is determined that the steel bar connection state of the steel bar connection structure is in a horseshoe-shaped local tightened state.

2. The reinforcing bar connection state detection system according to claim 1, characterized by The two connection ends of the resistance tester are connected at a distance equal to the distance between each steel bar and the end of the steel bar threaded sleeve on the same side.

3. The steel bar connection state detection system according to claim 1, wherein The first acquisition unit is a resistance detection loop of a plurality of steel bars in an un-tightened state, and the average value of the resistance value of the steel bar connection structure connected by the resistance tester in the full set of resistance detection loops or the interval range of the minimum value and the maximum value is taken as the standard resistance value interval range of the un-tightened state; The second acquisition unit is a resistance detection loop of a plurality of steel bars in a tightened state, and the average value of the resistance value of the steel bar connection structure connected by the resistance tester in the full set of resistance detection loops or the interval range of the minimum value and the maximum value is taken as the standard resistance value interval range of the tightened state.

4. The reinforcing bar connection state detection system according to claim 3, characterized by The first acquisition unit is a resistance detection loop of more than ten steel bars in an un-tightened state, and the second acquisition unit is a resistance detection loop of more than ten steel bars in a tightened state.

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