A device and method for measuring the elongation rate of cold-bent steel bars

Abstract

The present invention discloses a device for measuring the elongation rate of cold-bent steel bars, comprising a base; an electro-hydraulic telescopic cylinder, wherein there are more than 3 electro-hydraulic telescopic cylinders, the cylinder bodies of the electro-hydraulic telescopic cylinders are fixedly installed on the upper surface of the base, and the push rods of the electro-hydraulic telescopic cylinders are parallel to each other and have the same direction; a support member, the number of the support members is the same as the number of the electro-hydraulic telescopic cylinders, the support members are adjustably installed on the upper surface of the base, the support members and the electro-hydraulic telescopic cylinders are arranged in one-to-one correspondence directly in front of the push rods of the electro-hydraulic telescopic cylinders, and the support members are not on the same straight line; further comprising: a device for measuring the elongation distance of the steel bar; a controller, and the controller is electrically connected to the displacement sensor. It is used to solve the problem that the prior art cannot detect the elongation rate of steel bars.

Description

Technical Field

[0001] The present invention relates to the technical field of cold bending of steel bars, and particularly relates to a device and method for measuring the elongation rate of cold-bent steel bars. Background Art

[0002] When a substation of a photovoltaic power station uses steel bars, the steel bars need to be cold-bent first. Traditional cold bending of steel bars can only bend the steel bars and cannot detect the elongation rate of the steel bars. However, the elongation rate of the steel bars is an important index for the quality of the steel bars. If the elongation rate of the steel bars is not detected during the cold bending process of the steel bars, it may lead to unqualified steel bars being applied to the project, affecting the project quality. Summary of the Invention

[0003] In order to solve the above-mentioned shortcomings and deficiencies of the prior art, the primary object of the present invention is to provide a device and method for measuring the elongation rate of cold-bent steel bars.

[0004] The technical solution of the present invention is: A device for measuring the elongation rate of cold-bent steel bars, comprising:

[0005] A base;

[0006] An electric hydraulic telescopic cylinder, where there are more than 3 electric hydraulic telescopic cylinders. The cylinder body of the electric hydraulic telescopic cylinder is fixedly installed on the upper surface of the base, and the push rods of the electric hydraulic telescopic cylinders are parallel to each other and have the same direction;

[0007] A support member, the number of the support members is the same as the number of the electric hydraulic telescopic cylinders. The support members are adjustably installed on the upper surface of the base. The support members are arranged in front of the push rods of the electric hydraulic telescopic cylinders in a one-to-one correspondence with the electric hydraulic telescopic cylinders, and the support members are not on the same straight line;

[0008] It further includes:

[0009] A device for measuring the elongation distance of the steel bar, which includes a first fixed connector, a second fixed connector, a hose, a measuring rope, a fixed clip, and a displacement sensor. Clips matching the diameter of the steel bar are provided at the lower parts of the first fixed connector, the second fixed connector, and the fixed clip. One end of the hose is fixedly connected to the first fixed connector, and the other end is fixedly connected to the second fixed connector. The upper part of the fixed clip is fixedly connected to the hose. The diameter of the measuring rope is smaller than the inner diameter of the hose. The measuring rope is installed in the hose. The displacement sensor is fixedly connected in the second fixed connector. One end of the measuring rope is fixedly connected to the first fixed connector, and the other end is connected to the displacement sensor;

[0010] A controller, which is electrically connected to the displacement sensor.

[0011] Furthermore, the controller is electrically connected to the electric hydraulic telescopic cylinder.

[0012] Further, the base further includes:

[0013] A support member installation groove group is provided on the base. The support member installation groove group penetrates the upper and lower surfaces of the base. The number of the support member installation groove groups is the same as the number of the electro-hydraulic telescopic cylinders. The support member installation groove group includes more than 2 installation grooves, and the support member installation groove groups are arranged in front of the push rods of the electro-hydraulic telescopic cylinders in one-to-one correspondence;

[0014] The support member includes:

[0015] A clamping plate, the diameter of the clamping plate is larger than the diameter of the installation groove of the support member installation groove group;

[0016] A positioning block, the positioning block is matched with the installation groove, and the lower end of the positioning block is fixedly connected to the upper surface of the clamping plate;

[0017] A rotating shaft, the rotating shaft is fixedly connected to the upper surface of the clamping plate, and a thread is provided on the upper part of the rotating shaft;

[0018] A rotating cylinder, a rotating hole matching the rotating shaft is provided on the central axis of the rotating cylinder, and the rotating cylinder is rotationally connected to the rotating shaft through the rotating hole;

[0019] A fixing bolt, the fixing bolt is matched with the thread, and the fixing bolt is threadedly installed on the upper part of the rotating shaft.

[0020] Further, it further includes:

[0021] A display, the display is electrically connected to the controller.

[0022] Further, it further includes:

[0023] A human-computer interaction device, the human-computer interaction device is electrically connected to the controller.

[0024] Further, it further includes:

[0025] A laser rangefinder, the laser emitter and the laser receiver of the laser rangefinder are respectively arranged on the opposite surfaces of the first fixed connector and the second fixed connector, and the laser rangefinder is electrically connected to the controller.

[0026] A method for measuring the steel bar growth rate of the device,

[0027] including the following steps,

[0028] S1. Set the upper limit value δ of the steel bar elongation rate through the human-computer interaction device max ;

[0029] S2. Clamp the clip at the lower end of the first fixed connector on one side of the bent part of the steel bar, clamp the clip at the lower end of the second fixed connector on the other side of the bent part of the steel bar, and clamp the clip at the lower part of the fixing clip on the steel bar between the first fixed connector and the second fixed connector. Keep the fixing clip evenly spaced between the first fixed connector and the second fixed connector, and ensure that the hose and the measuring rope are taut;

[0030] S3. Use a laser rangefinder to measure the distance L between the first fixed connector and the second fixed connector, and send L to the controller;

[0031] S4. Place the steel bar between the support on the bottom plate and the electro-hydraulic telescopic cylinder, and start the electro-hydraulic telescopic cylinder to bend the steel bar;

[0032] S5. Measure the elongation length ΔL of the measuring rope through the displacement sensor, and send ΔL to the controller;

[0033] S6. The controller calculates the elongation rate of the steel bar

[0034] S7. If δ≥δ max , the controller controls the electro-hydraulic telescopic cylinder to stop.

[0035] The beneficial effects of the present invention are as follows:

[0036] Compared with the prior art,

[0037] 1) The present invention indirectly measures the elongation rate of the steel bar by measuring the displacement of the end point of the measuring rope and keeping the shape of the measuring rope consistent before and after the steel bar is bent;

[0038] 2) By placing the measuring rope inside the hose, first, the measuring rope is not in contact with the outside world, increasing the service life of the measuring rope; second, the displacement of the measuring rope is not affected by the outside world, increasing the measurement accuracy;

[0039] 3) The controller can calculate the elongation rate of the steel bar by blocking based on the elongation of the measuring rope and the pre-measured distance between the first fixture and the second fixture;

[0040] 4) The structure of the steel bar elongation distance measuring device is simple and the installation is simple;

[0041] 5) Since both the hose and the measuring rope are flexible, the measurement of the elongation distance of the steel bar is not limited by the shape of the steel bar, with a wide range of applications and convenient and fast measurement. Description of the Drawings

[0042] Figure 1 It is a three-dimensional view of an embodiment of the present invention;

[0043] Figure 2Top view of the embodiment of the present invention;

[0044] Figure 3 Front view of the embodiment of the present invention;

[0045] Figure 4 Stereoscopic view of the steel bar elongation distance measuring device of the embodiment of the present invention;

[0046] Figure 5 Right side view of the steel bar elongation distance measuring device of the embodiment of the present invention;

[0047] Figure 6 Cross-sectional view of the A-A section of the embodiment of the present invention;

[0048] Figure 7 Stereoscopic view of the support member of the embodiment of the present invention;

[0049] Figure 8 Stereoscopic view of the support member of the embodiment of the present invention without the rotating cylinder installed;

[0050] Figure 9 Schematic diagram of the electrical connection of the embodiment of the present invention. Detailed implementation manners

[0051] The present invention will be further introduced below in conjunction with the accompanying drawings and specific embodiments:

[0052] Reference Figures 1 to 8, A device for measuring the elongation rate of cold-bent steel bars, comprising: a base 1; an electro-hydraulic telescopic cylinder 2, with more than 3 electro-hydraulic telescopic cylinders 2, the cylinder bodies of the electro-hydraulic telescopic cylinders 2 being fixedly installed on the upper surface of the base 1, and the push rods of the electro-hydraulic telescopic cylinders 2 being parallel to each other and in the same direction; a support member 3, the number of the support members 3 being the same as the number of the electro-hydraulic telescopic cylinders 2, the support members 3 being adjustably installed on the upper surface of the base 1, the support members 3 and the electro-hydraulic telescopic cylinders 2 being arranged in one-to-one correspondence directly in front of the push rods of the electro-hydraulic telescopic cylinders 2, and the support members 3 not being on the same straight line; further comprising: a steel bar elongation distance measuring device 4, the steel bar elongation distance measuring device 4 comprising a first fixed connector 401, a second fixed connector 402, a hose 404, a measuring rope 407, a fixed clip 403 and a displacement sensor 406, the lower parts of the first fixed connector 401, the second fixed connector 402 and the fixed clip 403 being provided with clips matching the diameter of the steel bar 5, one end of the hose 404 being fixedly connected to the first fixed connector 401 and the other end being fixedly connected to the second fixed connector 402, the upper part of the fixed clip 403 being fixedly connected to the hose 404, the diameter of the measuring rope 407 being smaller than the inner diameter of the hose 404, the measuring rope 407 being installed in the hose 404, the displacement sensor 406 being fixedly connected in the second fixed connector 402, and one end of the measuring rope 407 being fixedly connected to the first fixed connector 401 and the other end being connected to the displacement sensor 406; a controller 6, the controller 6 being electrically connected to the displacement sensor 406. The controller 6 can be a microprocessor such as a PLC, an ARM, or an integrated functional module such as an Arduino.

[0053] The present invention indirectly measures the elongation rate of the steel bar 5 by measuring the displacement of the end point of the measuring rope 407 and making the shape of the measuring rope 407 remain consistent before and after the steel bar 5 is bent; by placing the measuring rope 407 inside the hose 404, on the one hand, the measuring rope 407 is not in contact with the outside world, increasing the service life of the measuring rope 407, and on the other hand, the displacement of the measuring rope 407 is not affected by the outside world, increasing the measurement accuracy; the controller 6 can calculate the elongation rate of the steel bar through the elongation amount of the measuring rope 407 and the pre-measured distance between the first fixator 401 and the second fixator 402; the structure of the steel bar elongation distance measuring device is simple and the installation is simple; since both the hose 404 and the measuring rope 407 are flexible, the measurement of the elongation distance of the steel bar 5 is not limited by the shape of the steel bar 5, the application range is wide, and the measurement is convenient and fast.

[0054] Further, the controller 6 is electrically connected to the electro-hydraulic telescopic cylinder 2.

[0055] The upper limit of the elongation rate can be preset to achieve the control of the elongation rate of the steel bar.

[0056] Further, the base 1 further includes: a support member mounting groove group 101, which is opened on the base 1, penetrates the upper and lower surfaces of the base 1, the number of the support member mounting groove group 101 is the same as the number of the electro-hydraulic telescopic cylinders 2, the support member mounting groove group 101 includes more than 2 mounting grooves 1011, and the support member mounting groove group 101 is arranged directly in front of the push rod of the electro-hydraulic telescopic cylinder 2 in one-to-one correspondence; the support member 3 includes: a clamping plate 301, the diameter of the clamping plate 301 is larger than the diameter of the mounting groove 1011 of the support member mounting groove group 101; a positioning block 302, the positioning block 302 is matched with the mounting groove 1011, and the lower end of the positioning block 302 is fixedly connected to the upper surface of the clamping plate 301; a rotating shaft 303, the rotating shaft 303 is fixedly connected to the upper surface of the clamping plate 301, and a thread is provided on the upper part of the rotating shaft 303; a rotating cylinder 304, a rotating hole matching the rotating shaft 303 is opened on the central axis of the rotating cylinder 304, and the rotating cylinder 304 is rotationally connected to the rotating shaft 303 through the rotating hole; a fixing bolt 305, the fixing bolt 305 is matched with the thread, and the fixing bolt 305 is threadedly installed on the upper part of the rotating shaft 303.

[0057] By changing the position of the support member 3 on the support member mounting groove group 101, the bending shapes of different steel bars can be realized.

[0058] Further, it further includes: a display 7, and the display 7 is electrically connected to the controller 6.

[0059] The elongation rate of the steel bar can be conveniently seen through the display 7.

[0060] Further, it further includes: a human-computer interaction device 8, and the human-computer interaction device 8 is electrically connected to the controller 6.

[0061] The human-computer interaction device 8 can be a keyboard or a touch screen, and the control upper limit of the elongation rate of the steel bar can be conveniently input.

[0062] Further, it further includes: a laser rangefinder 9, the laser emitter and the laser receiver of the laser rangefinder 9 are respectively arranged on the opposite surfaces of the first fixed connector 401 and the second fixed connector 402, and the laser rangefinder 9 is electrically connected to the controller 6.

[0063] The distance between the first fixed connector 401 and the second fixed connector 402 can be conveniently measured through the laser rangefinder 9, avoiding the trouble of manual measurement.

[0064] A method for measuring the growth rate of steel bars of the said device includes the following steps

[0065] S1. Set the upper limit value δ of the elongation rate of the steel bar through the human-computer interaction device 8 max ;

[0066] S2. Clamp the clip at the lower end of the first fixed connector 401 on one side of the bent part of the steel bar 5, clamp the clip at the lower end of the second fixed connector 402 on the other side of the bent part of the steel bar 5, and clamp the clip at the lower part of the fixed clip 403 on the steel bar 5 between the first fixed connector 401 and the second fixed connector 402. The fixed clip 403 is kept uniform between the first fixed connector 401 and the second fixed connector 402, and ensure that the hose 404 and the measuring rope 407 are taut;

[0067] S3. Use the laser rangefinder 9 to measure the distance L between the first fixed connector 401 and the second fixed connector 402, and send L to the controller 6;

[0068] S4. Place the steel bar 5 between the support 3 on the bottom plate and the electro-hydraulic telescopic cylinder 2, and start the electro-hydraulic telescopic cylinder 2 to bend the steel bar 5;

[0069] S5. Measure the elongation length ΔL of the measuring rope 407 through the displacement sensor 406, and send ΔL to the controller 6;

[0070] S6. The controller 6 calculates the elongation rate of the steel bar 5

[0071] S7. If δ≥δ max , the controller 6 controls the electro-hydraulic telescopic cylinder 2 to stop.

[0072] This method is more rapid and convenient for measuring steel bars with irregularly shaped bending surfaces, and has better adaptability.

[0073] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, which should all be regarded as belonging to the protection scope of the present invention.

Claims

1. A device for measuring the elongation rate of cold-bent steel bars, comprising: a base (1); electric-hydraulic telescopic cylinders (2), with more than 3 electric-hydraulic telescopic cylinders (2). The cylinder bodies of the electric-hydraulic telescopic cylinders (2) are fixedly installed on the upper surface of the base (1), and the push rods of the electric-hydraulic telescopic cylinders (2) are parallel to each other and in the same direction; support members (3), the number of the support members (3) being the same as that of the electric-hydraulic telescopic cylinders (2). The support members (3) are adjustably installed on the upper surface of the base (1), and the support members (3) are arranged in front of the push rods of the electric-hydraulic telescopic cylinders (2) in one-to-one correspondence, and the support members (3) are not on the same straight line; characterized in that: it further includes: a steel bar elongation distance measuring device (4), which includes a first fixed connector (401), a second fixed connector (402), a hose (404), a measuring rope (407), a fixed clip (403) and a displacement sensor (406). The lower parts of the first fixed connector (401), the second fixed connector (402) and the fixed clip (403) are provided with clips matching the diameter of the steel bar (5). One end of the hose (404) is fixedly connected to the first fixed connector (401) and the other end is fixedly connected to the second fixed connector (402). The upper part of the fixed clip (403) is fixedly connected to the hose (404). The diameter of the measuring rope (407) is smaller than the inner diameter of the hose (404), and the measuring rope (407) is installed in the hose (404). The displacement sensor (406) is fixedly connected in the second fixed connector (402), and one end of the measuring rope (407) is fixedly connected to the first fixed connector (401) and the other end is connected to the displacement sensor (406); a controller (6), the controller (6) being electrically connected to the displacement sensor (406); the controller (6) being electrically connected to the electric-hydraulic telescopic cylinders (2); the base (1) further includes: a support member installation groove group (101), which is opened on the base (1), and the support member installation groove group (101) penetrates the upper and lower surfaces of the base (1). The number of the support member installation groove group (101) is the same as that of the electric-hydraulic telescopic cylinders (2). The support member installation groove group (101) includes more than 2 installation grooves (1011), and the support member installation groove group (101) is arranged in front of the push rods of the electric-hydraulic telescopic cylinders (2) in one-to-one correspondence; the support member (3) includes: a clamping plate (301), the diameter of the clamping plate (301) being larger than the diameter of the installation groove (1011) of the support member installation groove group (101); a positioning block (302), the positioning block (302) being matched with the installation groove (1011), and the lower end of the positioning block (302) being fixedly connected to the upper surface of the clamping plate (301); a rotating shaft (303), the rotating shaft (303) being fixedly connected to the upper surface of the clamping plate (301), and the upper part of the rotating shaft (303) being provided with threads; A rotary drum (304), a rotary hole matching the rotating shaft (303) is formed on the axis of the rotary drum (304), and the rotary drum (304) is rotationally connected to the rotating shaft (303) through the rotary hole; A fixing bolt (305), the fixing bolt (305) matches the thread, and the fixing bolt (305) is threadedly installed on the upper part of the rotating shaft (303); It further includes: A display (7), the display (7) is electrically connected to the controller (6); It further includes: A human-computer interaction device (8), the human-computer interaction device (8) is electrically connected to the controller (6); It further includes: A laser rangefinder (9), the laser emitter and the laser receiver of the laser rangefinder (9) are respectively arranged on the opposite surfaces of the first fixed connector (401) and the second fixed connector (402), and the laser rangefinder (9) is electrically connected to the controller (6); A method for measuring the growth rate of steel bars using the device, including the following steps, S1. Set the upper limit value δ of the steel bar elongation rate through the human-computer interaction device (8) max ; S2. Clamp the clip at the lower end of the first fixed connector (401) on one side of the bent part of the steel bar (5), clamp the clip at the lower end of the second fixed connector (402) on the other side of the bent part of the steel bar (5), and clamp the clip at the lower part of the fixed clamp (403) on the steel bar (5) between the first fixed connector (401) and the second fixed connector (402). The fixed clamp (403) is kept uniform between the first fixed connector (401) and the second fixed connector (402), and ensure that the hose (404) and the measuring rope (407) are taut; S3. Use the laser rangefinder (9) to measure the distance L between the first fixed connector (401) and the second fixed connector (402), and send L to the controller (6); S4. Place the steel bar (5) between the support (3) on the bottom plate and the electro-hydraulic telescopic cylinder (2), and start the electro-hydraulic telescopic cylinder (2) to bend the steel bar (5); S5. Measure the elongation length ΔL of the measuring rope (407) through the displacement sensor (406), and send ΔL to the controller (6); S6. The controller (6) calculates the elongation rate of the steel bar (5). S7. If δ≥δ max , the controller (6) controls the electro-hydraulic telescopic cylinder (2) to stop.

Images