Quality detection device suitable for steel bar straight thread mechanical connection

Abstract

The utility model provides a quality detection device suitable for reinforcing steel bar straight thread mechanical connection, which relates to the technical field of reinforcing steel bar detection, detects two adjacent reinforcing steel bars, and comprises a sleeve and a resistance meter, threads matched with the outer surface of the steel bar wire head are distributed in the sleeve. The resistance meter is connected with the two ends of the sleeve through two resistance test clamps respectively, and the sides, close to each other, of the resistance test clamps are zigzag; during detection, the two steel bars are installed in the two ends of the sleeve through the corresponding steel bar wire heads respectively, the resistance meter is arranged to measure the resistance of the sleeve after the steel bars are installed, whether steel bar notches are flat or not and whether the steel bar wire heads are long enough or not are judged, and the problem that in the prior art, the steel bar connection quality cannot be judged, and the detection accuracy is poor is solved. And the connection effect of the steel bars is not good.

Description

Technical Field

[0001] The utility model relates to the technical field of steel bar detection, and particularly relates to a quality detection device suitable for the mechanical connection of straight threads of steel bars. Background Art

[0002] The mechanical connection of steel bars is a new type of steel bar connection process, which has the advantages of fast construction speed and steel saving compared with steel bar binding and welding, and is widely used in industries such as building construction, bridges, and water conservancy.

[0003] In the prior art, during the construction process of the mechanical connection of steel bars, a pipe wrench needs to be used to tighten the steel bar joints when splicing the steel bars, so that the two steel bar thread ends are tightly abutted against each other at the central position of the sleeve. However, during the construction process, it is impossible to visually observe whether the two steel bar thread ends are tightly abutted against each other at the central position of the sleeve, and it is impossible to judge the quality of the steel bar connection, resulting in poor steel bar connection effect. Summary of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the utility model provides a quality detection device suitable for the mechanical connection of straight threads of steel bars, and solves the problem that in the prior art, during the construction process, it is impossible to judge the connection quality of the steel bars after connection.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the utility model is realized through the following technical solutions:

[0008] In the utility model, the quality detection device suitable for the mechanical connection of straight threads of steel bars is used to detect two adjacent steel bars, and includes a sleeve and a resistance meter. One end of each of the two steel bars close to each other is respectively provided with a steel bar thread end, and threads adapted to the outer surface of the steel bar thread end are arranged inside the sleeve;

[0009] The resistance meter is respectively connected to both ends of the sleeve through two resistance test clips, and one side of each resistance test clip close to each other is respectively serrated;

[0010] During detection, the two steel bars are respectively installed inside both ends of the sleeve through the corresponding steel bar thread ends.

[0011] Further, arc-shaped grooves are respectively opened at both port sides of the sleeve.

[0012] Further, the arc on the side of the arc-shaped groove close to the outer surface of the sleeve is a part of a circle, and the diameter of the circle forming the arc-shaped groove is the same as the outer diameter of the sleeve.

[0013] Furthermore, a plurality of arc-shaped grooves are provided, and the plurality of arc-shaped grooves are respectively located at both ends of the sleeve, and the arc-shaped grooves at both ends correspond to each other one by one.

[0014] Furthermore, the sleeve is integrally formed.

[0015] (III) Beneficial effects

[0016] The utility model provides a quality inspection device applicable to the mechanical connection of straight-threaded steel bars. Compared with the prior art, the following beneficial effects are achieved:

[0017] By providing a resistance meter, the resistance meter is connected to both ends of the sleeve through resistance meter test clips to measure the resistance of the sleeve after the steel bars are installed, and then to judge whether the two steel bar thread ends inside the sleeve are in complete contact when the steel bars are connected through the sleeve, and further to judge whether the steel bar cut is flat and whether the length of the steel bar thread end is sufficient, solving the problem in the prior art that during the construction process, it is impossible to visually observe whether the two steel bar thread ends are tightly pressed against each other at the central position of the sleeve, and it is impossible to judge the quality of the steel bar connection, resulting in poor steel bar connection effect. Description of the drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a three-dimensional view of the sleeve;

[0020] Figure 2 It is a three-dimensional view of the steel bar;

[0021] Figure 3 It is a structural diagram when the resistance meter measures the resistance during the connection of the steel bars;

[0022] Figure 4 It is a cross-sectional view when the steel bars are connected through the sleeve and not in contact;

[0023] Figure 5 It is a cross-sectional view when the steel bar thread end is not flat during connection;

[0024] Figure 6 It is a structural schematic diagram of another embodiment of the sleeve.

[0025] Reference numerals:

[0026] 1. Sleeve; 11. Arc-shaped groove; 2. Steel bar; 3. Steel bar thread end; 4. Resistance meter. Detailed implementation manners

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0028] By providing a quality detection device applicable to the mechanical connection of straight-threaded steel bars in the embodiments of the present application, the problem in the prior art that during the construction process, it is impossible to judge the connection quality of the steel bars after connection is solved, and accurate judgment of the steel bar connection quality after steel bar connection is achieved.

[0029] The overall idea of the technical solutions in the embodiments of the present application to solve the above technical problems is as follows:

[0030] As Figures 1-6 shown, by setting a resistance meter, the resistance meter is connected to both ends of the sleeve through resistance meter test clips to measure the resistance of the sleeve after installing the steel bars, and then to judge whether the two steel bar thread ends inside the sleeve are in complete contact when the steel bars are connected through the sleeve, and further to judge whether the steel bar cut is flat and whether the length of the steel bar thread end is sufficient, solving the problem in the prior art that during the construction process, it is impossible to observe with the naked eye whether the two steel bar thread ends are tightly pressed against each other at the central position of the sleeve, and it is impossible to judge the steel bar connection quality, resulting in poor steel bar connection effect.

[0031] To better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the specification drawings and specific implementation manners.

[0032] As Figures 1-5 shown, a quality detection device applicable to the mechanical connection of straight-threaded steel bars detects two adjacent steel bars 2, including a sleeve 1 and a resistance meter 4. Steel bar thread ends 3 are respectively provided at the mutually approaching ends of the two steel bars 2, and threads adapted to the outer surfaces of the steel bar thread ends 3 are arranged inside the sleeve 1;

[0033] The resistance meter 4 is connected to both ends of the sleeve 1 through two resistance test clips, and the mutually approaching sides of each resistance test clip are respectively serrated;

[0034] During detection, the two steel bars 2 are respectively installed inside both ends of the sleeve 1 through the corresponding steel bar thread ends 3.

[0035] By setting up a resistance meter 4, which is connected to both ends of the casing 1 through resistance meter test clips, the resistance of the casing 1 after installing the reinforcing bar 2 is measured. Then, when judging whether the two reinforcing bar ends 3 inside the casing 1 are fully abutted when the reinforcing bar 2 is connected through the casing 1, it can be further judged whether the reinforcing bar cut is flat and whether the length of the reinforcing bar end is sufficient, solving the problem in the prior art that during the construction process, it is impossible to visually observe whether the two reinforcing bar ends are tightly abutted at the central position of the sleeve, and it is impossible to judge the quality of the reinforcing bar connection, resulting in poor reinforcing bar connection effect.

[0036] As Figure 6 shown, arc-shaped grooves 11 are respectively formed at both port sides of the casing 1. By forming arc-shaped grooves 11 at both port sides of the casing 1, it is convenient for the resistance meter test clips to be clamped on the casing 1, improving the stability when the resistance meter 4 measures the resistance of the casing 1.

[0037] As Figure 6 shown, the arc on the side of the arc-shaped groove 11 close to the outer surface of the sleeve 1 is a part of a circle, and the diameter of the circle forming the arc-shaped groove 11 is the same as the outer diameter of the casing 1.

[0038] By setting the diameter of the circle forming the arc-shaped groove 11 to be the same as the outer diameter of the casing 1, it can be ensured that the radian of the side of the arc-shaped groove 11 close to the outer surface of the sleeve 11 is the same as the radian of the outer surface of the sleeve 1. Thus, when the resistance meter test clip clamps the casing 1 through the arc-shaped groove 11, the contact degree between the resistance meter test clip and the outer surface of the casing 1 and the clamping surface of the arc-shaped groove 11 is the same, further improving the stability when the resistance meter test clip clamps the casing 1 and facilitating the measurement of the resistance of the casing 1.

[0039] As Figure 6 shown, a plurality of arc-shaped grooves 11 are provided. The plurality of arc-shaped grooves 11 are respectively located at both ends of the casing 1, and the arc-shaped grooves 11 at both ends correspond to each other one by one.

[0040] By providing a plurality of arc-shaped grooves 11, which are respectively located at both ends of the casing 1, the resistance meter test clip is clamped in any one of the arc-shaped grooves 11 at the corresponding end, thus facilitating the clamping operation of the resistance meter test clip and the casing 1.

[0041] Specifically, the side of the arc-shaped groove 11 close to the outer surface of the casing 1 is not smooth, increasing the friction force for the resistance meter test clip to clamp, improving the stability during resistance measurement, and the casing 1 is integrally formed, which is convenient for the batch production of the casing 1.

[0042] During operation, a quality inspection device for straight thread mechanical connection of reinforcing bars is used to detect the connection state of the reinforcing bars, including the following steps:

[0043] S1: Process the reinforcing bar 2 to obtain the reinforcing bar end 3;

[0044] S2: Obtain the resistivity ρ of the steel bar 2 and the casing 1, the diameter D1 of the steel bar, the inner diameter of the casing 1 is generally equal to the diameter of the steel bar 2 as D1, the outer diameter D2 of the casing 1, and the length L of the casing;

[0045] S3: Connection of the steel bars 2. Two steel bar threaded ends 3 are connected through the casing 3;

[0046] During connection, the two steel bar threaded ends 3 are in contact or both steel bar threaded ends 3 are completely located inside the sleeve 1 to complete the connection of the steel bars 2;

[0047] S4: Calculate the resistance R = ρ * L / S = 4 * ρ * L / (π * D2 2 ) when the cut of the steel bar 2 is flat, the length of the steel bar threaded end 3 is sufficient, and the two steel bar threaded ends 3 are tightly pressed against each other at the central position of the sleeve 1 as the comparison resistance value;

[0048] where S is the cross-sectional area of the outer diameter of the casing 1;

[0049] S5: Calculate the resistance after the connection of the steel bars 2 during the construction of the steel bars 2;

[0050] S6: Judge the connection quality of the steel bars 2.

[0051] When calculating the resistance after the connection of the steel bars 2 during the construction of the steel bars 2:

[0052] When the cut of the steel bar 2 is flat, the length of the steel bar threaded end 3 is sufficient, and the two threaded ends are not tightly pressed against each other at the central position of the sleeve 1, and the distance between the two steel bar threaded ends 3 is h, the resistance R1 measured by the resistance meter 4 = ρ * (L - h) / S + ρ * h / S1 = 4 * ρ * (L - h) / (π * D2 2 ) + 4 * ρ * h / (π * (D2 2 - D1 2 )), S1 is the area of the inner diameter of the casing without filling the steel bar, and R1 < R;

[0053] When the cut of the steel bar 2 is not flat and the end of the steel bar 2 is horseshoe-shaped, the measured resistance is R2, and R2 < R;

[0054] It can be judged that when the resistance measured by the resistance meter 4 is less than R, the connection quality of the steel bars 2 is low. According to the actual situation, adjust the steel bars 2 and the steel bar threaded ends 3 to improve the connection quality of the steel bars 2.

[0055] The utility model detects the quality of the straight thread mechanical connection of steel bars based on the principle of resistance measurement. By measuring the resistance of the connection section, it judges whether there are problems such as the cut of the top of the steel bar being uneven and horseshoe-shaped, the length of the steel bar threaded end being insufficient, or the threading quality being poor, resulting in the inability of the two threaded ends to be tightly pressed against each other at the central position of the sleeve.

[0056] In summary, compared with the prior art, the following beneficial effects are achieved:

[0057] 1. By setting up a resistance meter 4, the resistance meter 4 is connected to both ends of the sleeve 1 through the resistance meter test clips to measure the resistance of the sleeve 1 after installing the steel bar 2. Then, when judging whether the steel bar 2 is connected through the sleeve 1, it can be determined whether the two steel bar ends 3 located inside the sleeve 1 are in full contact, and further determine whether the steel bar cut is flat and whether the length of the steel bar end is sufficient. This solves the problem in the prior art that during the construction process, it is impossible to visually observe whether the two steel bar ends are tightly pressed against each other at the central position of the sleeve, and it is impossible to judge the quality of the steel bar connection, resulting in poor steel bar connection effect.

[0058] 2. By providing arc-shaped grooves 11 at both port sides of the sleeve 1, it is convenient for the resistance meter test clips to be clamped on the sleeve 1, improving the stability when the resistance meter 4 measures the resistance of the sleeve 1.

[0059] 3. By setting the diameter of the circle forming the arc-shaped groove 11 to be the same as the outer diameter of the sleeve 1, it can be achieved that the radian of the arc-shaped groove 11 close to the outer surface of the sleeve 11 is the same as the radian of the outer surface of the sleeve 1. Thus, when the resistance meter test clips are clamped to the sleeve 1 through the arc-shaped grooves 11, the contact degree between the resistance meter test clips and the outer surface of the sleeve 1 and the clamping surface of the arc-shaped grooves 11 is the same, further improving the stability when the resistance meter test clips are clamped to the sleeve 1 and facilitating the measurement of the resistance of the sleeve 1.

[0060] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0061] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A quality inspection device applicable to the mechanical connection of straight-threaded steel bars, which inspects two adjacent steel bars (2), and is characterized in that, It includes a casing (1) and a resistance meter (4). One end of each of the two steel bars (2) close to each other is respectively provided with a steel bar thread head (3), and threads adapted to the outer surface of the steel bar thread head (3) are arranged inside the casing (1). The resistance meter (4) is connected to both ends of the casing (1) through two resistance test clips, and one side of each resistance test clip close to each other is serrated respectively. During detection, the two steel bars (2) are respectively installed inside both ends of the casing (1) through the corresponding steel bar thread heads (3).

2. The quality inspection device applicable to the mechanical connection of straight-threaded steel bars according to claim 1, characterized in that, Arc-shaped grooves (11) are respectively formed at both side ports of the casing (1).

3. The quality inspection device for the mechanical connection of straight-threaded steel bars according to claim 2, characterized in that, The arc of the arc-shaped groove (11) close to the outer surface of the casing (1) is a part of a circle, and the diameter of the circle forming the arc-shaped groove (11) is the same as the outer diameter of the casing (1).

4. The quality inspection device for the mechanical connection of straight-threaded steel bars according to claim 2, characterized in that, A plurality of the arc-shaped grooves (11) are provided, and the plurality of arc-shaped grooves (11) are respectively located at both ends of the casing (1), and the arc-shaped grooves (11) at both ends correspond to each other one by one.

5. The quality inspection device applicable to the mechanical connection of straight-threaded steel bars according to claim 4, characterized in that, The casing (1) is integrally formed.

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