A steel bar performance testing instrument

Abstract

The present invention relates to the technical field of steel bar strength testing, and specifically to a steel bar performance tester; it comprises a testing platform and supporting legs on the lower surface of the testing platform; a testing groove is provided through the upper surface of the testing platform; a testing block is slidably connected in the testing groove; the testing block passes through the testing groove along the length direction and is connected to a screw rod by threaded transmission; the end of the screw rod is rotatably connected to the testing groove; one end of the screw rod is connected to a motor and driven by the motor; two pressure rods are fixedly connected to the upper surface of the testing block; the distance between the two pressure rods is not less than the diameter of the steel bar to be tested; the present invention enables multiple steel bars to complete the bending performance testing process at the same time by clipping the ends of multiple steel bars into the upper limit grooves of the corresponding limit seats and cooperating with the driven pressure rods. Compared with the bending performance testing of single steel bars in sequence, the efficiency of steel bar performance testing is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel bar strength testing, in particular to a steel bar performance detector. Background Art

[0002] Rebar in concrete structures is often subjected to complex stress states, including bending, tension, compression, and shear. Flexural strength, which refers to a steel bar's ability to resist bending failure under bending loads, is crucial for ensuring the reliability and safety of steel in practical applications. Therefore, the flexural strength of steel directly impacts the overall strength and durability of the structure. Steel bars with high flexural strength effectively disperse and withstand external forces, reducing the risk of structural damage and destruction.

[0003] The existing method for testing the bending performance of steel bars is to first clamp one end of a single steel bar in one of the clamping components in the detector, and after the other end of the single steel bar is also clamped by the corresponding clamping component, control the pressure device to drive the pressure head to squeeze the middle section of the single steel bar, so that the single steel bar is compressed and bent, and observe the surface of the steel bar after bending to determine whether the steel bar meets the bending performance standards; the method of testing single steel bars in sequence is inefficient. For batch testing, the method of testing single steel bars in sequence cannot meet the existing testing efficiency requirements.

[0004] In view of this, in order to overcome the above technical problems, the present invention proposes a steel bar performance tester to solve the above technical problems. Summary of the Invention

[0005] In order to make up for the shortcomings of the existing technology, the present invention proposes a steel bar performance tester. The present invention enables multiple steel bars to complete the bending performance test process at the same time by clamping the ends of multiple steel bars into the upper limit grooves of the corresponding limit seats and cooperating with the driven pressure rods. Compared with the bending performance test of a single steel bar in sequence, the efficiency of the steel bar performance test is greatly improved.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a steel bar performance tester described in the present invention includes a test platform and a support leg on the lower surface of the test platform; a test slot is provided on the upper surface of the test platform; a test block is slidably connected in the test slot; the test block passes through the length direction of the test slot and is connected to the screw by thread transmission; the end of the screw is rotatably connected to the test slot; one end of the screw is connected to the motor and driven by the motor; the motor is fixed to the side wall of the test platform, and the screw is double-threaded; two pressure bars are fixed to the upper surface of the test block; the distance between the two pressure bars is not less than the diameter of the steel bar to be tested; the upper surface of the test platform is rotatably connected to the limit seat; the two limit seats are symmetrically distributed on both sides of the test slot; a limit slot is provided on the outer wall of the limit seat; the limit slot vertically passes through the limit seat; the width of the limit slot is adapted to the diameter of the steel bar to be tested; the depth of the limit slot is greater than the diameter of the steel bar to be tested; the limit slots on the two limit seats are correspondingly arranged; and the outer wall of the screw is sleeved with a folding sleeve.

[0007] Preferably, there are multiple limit grooves on the limit seat; the multiple limit grooves on the limit seat are evenly distributed around the center of the limit seat, and the groove width increases successively along the circumference of the limit seat; the lower surface of the limit seat is rotatably connected to the detection platform through a rotating rod; the two rotating rods are driven by gear meshing at the lower end; the limit grooves of the same specification on the two limit seats correspond to each other after the limit seat is rotated; the upper surface of one of the limit seats is eccentrically fixed to the crank.

[0008] Preferably, a limiting plate is slidably connected in the limiting groove; the limiting plate can move toward or away from the center of the limiting seat along the corresponding limiting groove; a side of the limiting plate close to the center of the limiting seat is connected to the corresponding limiting groove wall through a first spring.

[0009] Preferably, one of the two parallel groove walls of the limit groove is vertically penetrated with an unloading groove; an unloading rod is movably connected to the unloading groove; the unloading rod is in an inverted L-shape; the upper end of the unloading rod protrudes from the unloading groove; the lower end of the unloading rod is fixedly connected to the unloading plate; the unloading plate is movably connected to the limit groove up and down; after the limit plate is compressed by the corresponding first spring, the unloading rod can drive the unloading plate to move on the side of the limit plate away from the first spring.

[0010] Preferably, the outer walls of the pressing rods close to each other are provided with anti-slip blocks; the anti-slip blocks clamp the middle section of the steel bar after the corresponding pressing rod is pressed tightly against the middle section of the steel bar.

[0011] Preferably, the outer walls of the two pressing rods close to each other are provided with anti-slip grooves; the anti-slip grooves on a single pressing rod are evenly distributed in the vertical direction; the anti-slip block is slidably connected in the anti-slip groove; the anti-slip block and the bottom of the anti-slip groove are connected by a second spring; the anti-slip block can be retracted into the anti-slip groove under pressure; the anti-slip block extending out of the anti-slip groove can limit the middle position of the steel bar in the vertical direction.

[0012] Preferably, the groove wall in the middle section of the detection groove is provided with an avoidance groove; the detection block is provided with a driving groove; the driving groove is slidingly sealed and connected to the driving plate; the driving plate is provided with a driving rod on the side close to the avoidance groove; the driving rod passes through the detection block; the side of the driving plate facing away from the driving rod is connected to the groove wall of the driving groove by a third spring; the driving groove space of the driving plate facing away from the driving rod is connected to the inside of the anti-slip groove through the first air hole; the anti-slip block is slidingly sealed and connected to the anti-slip groove; the anti-slip block retracts into the corresponding anti-slip groove after the driving plate moves close to the avoidance groove.

[0013] Preferably, one of the pressure rods is provided with a locking rod at the upper end; the other pressure rod is provided with a driven groove at the upper end; the driven groove is slidingly sealed and connected to the driven block; the upper surface of the driven block is rotatably connected to the screw rod; the upper notch of the driven groove is fixedly connected to the orifice plate; the screw rod passes through the orifice plate and is threadedly connected to the orifice plate; the upper end of the screw rod is fixedly connected to the locking hook; the driven groove is connected to the inside of the driving groove through a second air hole; the upper end of the pressure rod is higher than the upper end of the limit seat; the upward movement of the driven block can drive the locking hook to rotate forward to hook the locking rod, and the downward movement of the driven block can drive the locking hook to reverse and disengage from the locking rod.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. The present invention enables the ends of multiple steel bars to be clamped into the upper limit grooves of the corresponding limit seats and cooperate with the driven pressure rods, so that multiple steel bars can complete the bending performance test process at the same time. Compared with the bending performance test of a single steel bar in sequence, the efficiency of the steel bar performance test is greatly improved.

[0016] In the present invention, the opening directions of the corresponding limit grooves on the two limit seats can change with the bending of the steel bars. The bent ends of the steel bars will move in the corresponding limit grooves. The limit plates in the corresponding limit grooves are pressed against the positions of the bent ends of the steel bars under the action of the elastic force of the first spring. The bent ends of the steel bars are limited by the limit plates, and the middle position of the steel bars is kept bent by the pressure rods. This also avoids the changes in the bending position of the steel bars affecting the test results, and further avoids the changes in the bending position of the steel bars causing the ends of the steel bars to move out of the corresponding limit grooves, thereby improving the stability of the steel bar test.

[0017] In the present invention, since multiple steel bars are clamped, restricted and separated by anti-slip blocks, the steel bars are more stable during the bending test, avoiding the situation where the steel bars move upward and fly out, making the steel bar performance test process safer. By hooking the upper ends of the two pressing bars with locking hooks, the two pressing bars are formed into a whole, the strength of one of the pressing bars squeezing the steel bar is increased, the bending deformation caused by the single pressing bar squeezing the steel bar is reduced, and the service life of the pressing bar is increased. The locking hook also serves to limit the upper space of the pressing bar area, thereby improving the service life and safety of the steel bar performance tester. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 It is a perspective view of the present invention;

[0020] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 yes Figure 1 A three-dimensional image from another angle;

[0022] Figure 4 It is a three-dimensional diagram of the limit seat and the unloading rod moving upward in the present invention;

[0023] Figure 5 It is a three-dimensional diagram of the detection platform of the present invention;

[0024] Figure 6 It is a three-dimensional diagram of the detection block and the pressure rod in the present invention;

[0025] Figure 7 This is a three-dimensional diagram of the avoidance groove and the driving rod in the present invention;

[0026] Figure 8 It is a partial cross-sectional view of the pressing rod and the detection block in the present invention;

[0027] Figure 9 yes Figure 8 Enlarged view of point B in the middle.

[0028] In the figure: detection table 1, support leg 11, detection groove 12, screw 13, motor 14, avoidance groove 15, detection block 2, drive groove 21, drive plate 22, drive rod 23, third spring 24, first air hole 25, second air hole 26, pressure rod 3, anti-slip block 31, anti-slip groove 32, second spring 33, locking rod 34, driven groove 35, driven block 36, screw 37, orifice plate 38, lock hook 39, limit seat 4, limit groove 41, rotating rod 42, gear 43, crank handle 44, limit plate 45, first spring 46, unloading groove 47, unloading rod 48, unloading plate 49. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0030] like Figures 1 to 9 As shown, the present invention includes the following embodiments:

[0031] Example 1:

[0032] A steel bar performance tester comprises a test platform 1 and a support leg 11 on the lower surface of the test platform 1; a test slot 12 is provided on the upper surface of the test platform 1; a test block 2 is slidably connected in the test slot 12; the test block 2 passes through the length direction of the test slot 12 and is connected to a screw rod 13 by thread transmission; the end of the screw rod 13 is rotatably connected to the test slot 12; one end of the screw rod 13 is connected to a motor 14 and is driven by the motor 14; the motor 14 is fixed to the side wall of the test platform 1, and the screw rod 13 is double-threaded; the upper surface of the test block 2 is fixed to the Two pressing bars 3; the distance between the two pressing bars 3 is not less than the diameter of the steel bar to be tested; the upper surface of the testing platform 1 is rotatably connected to the limit seat 4; the two limit seats 4 are symmetrically distributed on both sides of the testing groove 12; the outer wall of the limit seat 4 is provided with a limit groove 41; the limit groove 41 vertically passes through the limit seat 4; the width of the limit groove 41 is adapted to the diameter of the steel bar to be tested; the depth of the limit groove 41 is greater than the diameter of the steel bar to be tested; the limit grooves 41 on the two limit seats 4 are correspondingly arranged; the outer wall of the screw 13 is provided with a folding sleeve.

[0033] In this embodiment, there are multiple limit grooves 41 on the limit seat 4; the multiple limit grooves 41 on the limit seat 4 are evenly distributed around the center of the limit seat 4, and the groove width increases successively along the circumference of the limit seat 4; the lower surface of the limit seat 4 is rotatably connected to the detection platform 1 through a rotating rod 42; the two rotating rods 42 are engaged and transmitted by gears 43 at the lower ends; the limit grooves 41 of the same specification on the two limit seats 4 correspond to each other after the limit seat 4 rotates; the upper surface of one of the limit seats 4 is eccentrically fixed to the crank 44.

[0034] In this embodiment, a limiting plate 45 is slidably connected in the limiting groove 41; the limiting plate 45 can move along the corresponding limiting groove 41 toward or away from the center of the limiting seat 4; the side of the limiting plate 45 close to the center of the limiting seat 4 is connected to the wall of the corresponding limiting groove 41 through a first spring 46.

[0035] In this embodiment, a unloading groove 47 is vertically provided through one of the two parallel groove walls of the limit groove 41; an unloading rod 48 is movably connected to the unloading groove 47 up and down; the unloading rod 48 is in an inverted L-shape; the upper end of the unloading rod 48 protrudes from the unloading groove 47; the lower end of the unloading rod 48 is fixedly connected to the unloading plate 49; the unloading plate 49 is movably connected to the limit groove 41 up and down; after the limit plate 45 compresses the corresponding first spring 46, the unloading rod 48 can drive the unloading plate 49 to move on the side of the limit plate 45 away from the first spring 46.

[0036] During operation, when it is necessary to test the bending performance of steel bars, first move the broken steel bars to the test table 1 of the tester, and try to insert a single steel bar into the multiple limit slots 41 on the limit seat 4, select the limit slot 41 that is closest to the diameter of the steel bar, and then rotate the crank 44 on one of the limit seats 4, so that one of the limit seats 4 will drive the corresponding rotating rod 42 below to rotate, and the rotation of one of the rotating rods 42 will drive the connected gear 43 to rotate, so that the engagement of the two gears 43 will drive the other rotating rod 42 to rotate, and the rotation of the other rotating rod 42 will drive the other limit slot connected above. The seat 4 rotates, so that the two limit seats 4 will rotate. After the two limit seats 4 rotate, they will drive the corresponding two limit slots 41 to correspond to each other and align. Then, after the controller controls the motor 14 to rotate, the motor 14 drives the screw 13 to rotate in the detection slot 12, and the screw 13 will drive the detection block 2 to slide in the detection slot 12. The detection block 2 will drive the two pressure rods 3 on the upper surface to move between the two limit seats 4. The space between the two pressure rods 3 is the pressing area. After the detection block 2 moves, the pressing area is located between the two limit slots 41 to be used. The staff will dial the limit plate 45 in the limit slot 41 to be used, so that the limit After being toggled, the plate 45 overcomes the corresponding first spring 46 and moves toward the center of the corresponding limit seat 4, until the limit plate 45 moves away from the top of the unloading plate 49, the unloading rod 48 is triggered to move to the upper end, so that the upper end of the unloading rod 48 slides along the unloading groove 47 after being triggered, and the unloading rod 48 drives the unloading plate 49 to move to the side of the corresponding limit plate 45 away from the first spring 46, and the limit plate 45 that presses the first spring 46 is released, so that the limit plate 45 will press the end of the unloading plate 49 close to the center of the limit seat 4 under the elastic force of the first spring 46, so that the unloading plate 49 cannot move downward, and the limit plate 45 cannot return to its original position, and the limit groove 41 to be used The limiting plate 45 inside is at a position away from the outer wall of the limiting seat 4; the staff controls the multiple steel bars to be placed in the pressure reinforcement area in sequence, and in the process of placing the multiple steel bars in the pressure reinforcement area, the ends of the multiple steel bars are dropped into the corresponding limiting grooves 41, and then the unloading rod 48 is pressed against the upper end, so that the unloading rod 48 moves and moves downward in the unloading groove 47, and the unloading rod 48 drives the unloading plate 49 to move away from the side of the limiting plate 45 away from the corresponding first spring 46, so as to release the lock of the corresponding limiting plate 45, so that after being unlocked, the limiting plate 45 is pressed against the ends of the multiple steel bars in the limiting groove 41 under the action of the first spring 46, completing the loading process of the multiple steel bars;

[0037] The start controller controls the motor 14 to rotate, and the rotating motor 14 drives the detection block 2 to move in the detection groove 12 through the screw 13. The detection block 2 will drive the two pressure rods 3 to move along the length direction of the detection groove 12. One of the pressure rods 3 contacts the middle section of the steel bar after the detection block 2 moves, thereby squeezing the outer wall of the middle section of the steel bar, and the end of the steel bar is limited to the corresponding limit groove 41, and the two limit seats 4 are rotatably connected to the upper surface of the detection platform 1, so that the middle section of the steel bar can complete the bending action under the squeezing of the pressure rod 3, and the two limit seats 4 will rotate accordingly during the steel bar bending process, and the corresponding limit seats on the two limit seats 4 The opening direction of the groove 41 can change with the bending of the steel bar. The end of the bent steel bar will move in the corresponding limiting groove 41. The limiting plate 45 in the corresponding limiting groove 41 is pressed against the end of the bent steel bar under the elastic force of the first spring 46. The end of the bent steel bar is limited by the limiting plate 45, and the middle position of the steel bar is kept bent by the pressure rod 3. It also avoids the change of the bending position of the steel bar affecting the test effect, and further avoids the change of the bending position of the steel bar causing the end of the steel bar to move out of the corresponding limiting groove 41, thereby improving the stability of the steel bar test. Since the depth of the limiting groove 41 on the limiting seat 4 can accommodate multiple steel bars The two rods 3 are pressed together to form a circle, and the two rods 3 are pressed together to form a circle, and the two rods 3 are pressed together to form a circle, and the two rods 3 are pressed together to form a circle, and the two rods 3 are pressed together to form a circle, and the two rods 3 are pressed together to form a circle, and the two rods 3 are pressed together to form a circle, and the two rods 3 are pressed together to form a circle, and the two rods 3 are pressed together to form a circle, and the two rods 3 are pressed together to form a circle, and the two rods 3 are pressed together to form a circle, and the two rods 3 are pressed together to form a circle, and the two rods 3 are pressed together to form a circle, and the two rods 3 are pressed together to form a circle, and the two rods 3 are pressed together to form a circle, and the two rods 3 are pressed together to form a circle, and the two rods Until the multiple steel bars are bent in the reverse direction to the limit position, the motor 14 is controlled again to drive the pressure rod 3 to bend the middle section of the steel bar forward. In this way, the multiple steel bars are bent back and forth in two directions to better test the bending performance of the steel bars. During the steel bar bending test, since the other unused limit slots 41 of the limit seat 4 are close to the outer wall of the limit slot 41 and are blocked by the corresponding limit plate 45, it is difficult for debris to enter the other unused limit slots 41 and cause pollution, thereby preventing debris from entering the other unactivated limit slots 41 and causing subsequent jamming problems. Since the outer wall of the screw 13 is covered with a folding sleeve, it will not cause the problem of debris jamming.

[0038] After several steel bar bendings, the motor 14 drives the two pressing rods 3 to move to the initial position, that is, the pressing area is moved to the position between the two corresponding limit grooves 41, and the bent steel bar will also tend to a straight line shape with the movement of the pressing rod 3. Finally, the limit plate 45 in the enabled limit groove 41 is moved close to the center of the corresponding limit seat 4, so that the two limit plates 45 at the ends of the steel bar are separated from each other, and the two corresponding limit plates 45 release the tightness against the ends of the steel bar. The limit plate 45 will also move away from the unloading plate 49 in the same limit groove 41, and the corresponding unloading rod 48 is pulled close to the upper end, so that the unloading rod 48 can move up in the unloading groove 47 and drive the unloading plate 49 to move up. During the upward movement of the unloading plate 49, the steel bar in the enabled limit groove 41 can be pushed out from the bottom to the top, completing the steel bar unloading process after detection, and finally observing the damage of the bent position of the steel bar taken out from the limit groove 41 and the pressing area to determine whether its bending performance meets the requirements;

[0039] In this embodiment, when the steel bar is squeezed and bent by the pressure rod 3, the two limit seats 4 are engaged and driven by the gear 43, so that the two limit seats 4 rotate at the same angle, so that the activated limit grooves 41 on the two limit seats 4 are in symmetrical movement, further ensuring that the middle section of the steel bar is always under pressure;

[0040] The present invention enables multiple steel bars to complete the bending performance test process at the same time by inserting the ends of multiple steel bars into the corresponding upper limit grooves 41 of the limit seats 4 and cooperating with the driven pressure rod 3. Compared with the bending performance test of a single steel bar in sequence, the efficiency of the steel bar performance test is greatly improved.

[0041] The present invention provides a plurality of limiting grooves 41 of different specifications on the limiting seat 4, so that the limiting seat 4 can limit and clamp the ends of steel bars of different specifications, thereby meeting the steel bar performance tester's requirements for testing steel bars of different specifications.

[0042] Example 2:

[0043] The outer walls of the pressing rods 3 close to each other are provided with anti-slip blocks 31; the anti-slip blocks 31 clamp the middle section of the steel bar after the corresponding pressing rod 3 is pressed tightly against the middle section of the steel bar.

[0044] In this embodiment, the outer walls of the two pressing rods 3 close to each other are provided with anti-slip grooves 32; the anti-slip grooves 32 on a single pressing rod 3 are evenly distributed in the vertical direction; the anti-slip block 31 is slidably connected in the anti-slip groove 32; the anti-slip block 31 and the bottom of the anti-slip groove 32 are connected by a second spring 33; the anti-slip block 31 can be retracted into the anti-slip groove 32 under pressure; the anti-slip block 31 extending out of the anti-slip groove 32 can limit the middle position of the steel bar in the vertical direction.

[0045] In this embodiment, the groove wall at the middle position of the detection groove 12 is provided with an avoidance groove 15; the detection block 2 is provided with a driving groove 21; the driving groove 21 is slidingly and sealedly connected to the driving plate 22; the driving plate 22 is provided with a driving rod 23 on the side close to the avoidance groove 15; the driving rod 23 passes through the detection block 2; the driving plate 22 is connected to the groove wall of the driving groove 21 by a third spring 24; the space of the driving groove 21 where the driving plate 22 is away from the driving rod 23 is connected to the inside of the anti-slip groove 32 through the first air hole 25; the anti-slip block 31 is slidingly and sealedly connected to the anti-slip groove 32; the anti-slip block 31 retracts into the corresponding anti-slip groove 32 after the driving plate 22 moves close to the avoidance groove 15.

[0046] In this embodiment, one of the pressing rods 3 is provided with a locking rod 34 at the upper end; the other pressing rod 3 is provided with a driven groove 35 at the upper end; the driven groove 35 is slidingly sealed and connected to the driven block 36; the driven block 36 can only slide with the driven groove 35 and cannot rotate; the upper surface of the driven block 36 is rotatably connected to the screw rod 37; the upper notch of the driven groove 35 is fixedly connected to the orifice plate 38; the screw rod 37 passes through the orifice plate 38 and is threadedly connected to the orifice plate 38; the upper end of the screw rod 37 is fixedly connected to the locking hook 39; the driven groove 35 is connected to the inside of the driving groove 21 through the second air hole 26; the upper end of the pressing rod 3 is higher than the upper end of the limit seat 4; the upward movement of the driven block 36 can drive the locking hook 39 to rotate forward to hook the locking rod 34, and the downward movement of the driven block 36 can drive the locking hook 39 to reverse and disengage from the locking rod 34.

[0047] During operation, after completing the inspection of the steel bar, the steel bar will move to the middle position of the inspection groove 12 with the inspection block 2, and the steel bar will tend to a straight state under the compression and return of the pressure rod 3. When the inspection block 2 is in the middle position of the inspection groove 12, the third spring 24 will give the driving plate 22 an elastic force close to the avoidance groove 15, so that the driving plate 22 moves close to the avoidance groove 15, and the driving plate 22 divides the internal space of the driving groove 21 into a rod cavity and a rodless cavity. The rodless cavity is a cavity where the third spring 24 is provided. The rod cavity space is connected to the external gas, so it will not affect the movement of the driving plate 22 in the driving groove 21. Under the action of the elastic force of the third spring 24, the driving plate 22 drives the driving rod 23 to enter the avoidance groove 15 for avoidance, so that the internal space of the rodless cavity is increased to form a negative pressure, and the rodless cavity and the anti-slip groove 32 are filled with medium, so that the medium in the anti-slip groove 32 will be under the negative pressure. The screw rod 37 is pressed against the orifice plate 38 and the locking hook 39 is disengaged from the locking rod 34 during the reversal of the screw rod 37, so that the gap between the two pressing rods 3 is opened. In addition, after the anti-slip block 31 is retracted into the corresponding anti-slip groove 32, the steel bars in the ribbed area can be easily taken out. Since the middle section of the steel bar will produce a certain degree of deformation during the back-and-forth bending process, the active gap between the middle section of the steel bar in the ribbed area is expanded, thereby facilitating the removal of the steel bar.

[0048] After the steel bars are taken out, the new steel bars to be tested are put back into the rib pressing area, and the controller controls the motor 14 to rotate the motor 14 again to drive the detection block 2 to move toward the end of the detection groove 12. In the process of the detection block 2 leaving the middle position of the detection groove 12, the driving rod 23 moves out of the avoidance groove 15. Since the notch of the avoidance groove 15 is smoothly transitioned, there will be no jamming. In this way, the driving rod 23 can be smoothly moved out of the avoidance groove 15. The driving rod 23 will overcome the third spring 24 to squeeze the driving plate 22 to move in the driving groove 21, so that The space in the rodless cavity becomes smaller and the medium pressure increases, so that the medium enters the anti-slip groove 32 and the driven groove 35 along the first air hole 25 and the second air hole 26. The medium entering the anti-slip groove 32 can squeeze the anti-slip block 31, so that the anti-slip block 31 extends out from the anti-slip groove 32, and part of the anti-slip block 31 rests between the adjacent steel bar gaps in the vertical direction, thereby separating multiple adjacent gaps, and part of the anti-slip block 31 rests on the outer wall of the steel bar to clamp the outer wall of the steel bar. The anti-slip block 31 in the upper position can press the upper space of the rib area after extending. The locking hook 39 is rotated by the screw rod 37 and the locking rod 34 is hooked, thereby connecting the two pressing rods 3 to the upper end position. During the bending test of the pressing rod 3, one of the pressing rods 3 is squeezed by the motor 14, and the multiple steel bars are clamped and restricted by the anti-falling block 31 and the isolation Open, thereby making the steel bar more stable during the bending test, avoiding the situation where the steel bar moves upward and flies out, making the steel bar performance test process safer, and by hooking the upper ends of the two pressing bars 3 through the locking hook 39, the two pressing bars 3 are formed into a whole, thereby increasing the strength of one of the pressing bars 3 squeezing the steel bar, reducing the bending deformation caused by the single pressing bar 3 squeezing the steel bar, and improving the service life of the pressing bar 3. The locking hook 39 also plays a role in limiting the upper space of the pressing area; thereby improving the service life and safety of the steel bar performance tester.

[0049] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0050] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel bar performance tester, comprising a test platform (1) and a support leg (11) on the lower surface of the test platform (1); characterized in that: The upper surface of the detection table (1) is provided with a detection groove (12); the detection block (2) is slidably connected in the detection groove (12); the detection block (2) passes through the detection groove (12) along the length direction and is connected to the screw (13) by thread transmission; the end of the screw (13) is rotatably connected to the detection groove (12); one end of the screw (13) is connected to the motor (14) and is driven by the motor (14); two pressure rods (3) are fixedly connected to the upper surface of the detection block (2); the distance between the two pressure rods (3) is The diameter of the steel bar to be detected is not less than the diameter of the steel bar to be detected; the upper surface of the detection platform (1) is rotatably connected to the limit seat (4); the two limit seats (4) are symmetrically distributed on both sides of the detection groove (12); the outer wall of the limit seat (4) is provided with a limit groove (41); the limit groove (41) vertically passes through the limit seat (4); the width of the limit groove (41) is adapted to the diameter of the steel bar to be detected; the depth of the limit groove (41) is greater than the diameter of the steel bar to be detected; the limit grooves (41) on the two limit seats (4) are correspondingly arranged; There are a plurality of limit grooves (41) on the limit seat (4); the plurality of limit grooves (41) on the limit seat (4) are evenly distributed around the center of the limit seat (4), and the groove width increases successively along the circumference of the limit seat (4); the lower surface of the limit seat (4) is rotatably connected to the detection platform (1) through a rotating rod (42); the two rotating rods (42) are meshed and transmitted by gears (43) at the lower ends; the limit grooves (41) of the same specification on the two limit seats (4) correspond to each other after the limit seat (4) rotates; and the upper surface of one of the limit seats (4) is eccentrically fixed to a crank (44).

2. A steel bar performance detector according to claim 1, characterized in that: A limiting plate (45) is slidably connected in the limiting groove (41); the limiting plate (45) can move along the corresponding limiting groove (41) toward or away from the center of the limiting seat (4); a surface of the limiting plate (45) close to the center of the limiting seat (4) is connected to the wall of the corresponding limiting groove (41) via a first spring (46).

3. A steel bar performance detector according to claim 2, characterized in that: A discharge groove (47) is vertically provided on one of the two parallel groove walls of the limit groove (41); a discharge rod (48) is movably connected to the discharge groove (47) in an up-and-down manner; the discharge rod (48) is in an inverted L-shape; the upper end of the discharge rod (48) protrudes from the discharge groove (47); the lower end of the discharge rod (48) is fixedly connected to the discharge plate (49); the discharge plate (49) is movably connected to the limit groove (41) in an up-and-down manner; after the limit plate (45) compresses the corresponding first spring (46), the discharge rod (48) can drive the discharge plate (49) to move on the side of the limit plate (45) away from the first spring (46).

4. A steel bar performance detector according to claim 1, characterized in that: Anti-slip blocks (31) are provided on the outer walls of the pressing rods (3) that are close to each other; the anti-slip blocks (31) clamp the middle section of the steel bar after the corresponding pressing rod (3) is pressed tightly against the middle section of the steel bar.

5. A steel bar performance detector according to claim 4, characterized in that: The outer walls of the two pressing rods (3) close to each other are provided with anti-slip grooves (32); the anti-slip grooves (32) on a single pressing rod (3) are evenly distributed in the vertical direction; the anti-slip block (31) is slidably connected in the anti-slip groove (32); the anti-slip block (31) is connected to the bottom of the anti-slip groove (32) through a second spring (33); the anti-slip block (31) can be retracted into the anti-slip groove (32) under pressure; the anti-slip block (31) extending out of the anti-slip groove (32) can limit the middle position of the steel bar in the vertical direction.

6. A steel bar performance detector according to claim 5, characterized in that: The detection groove (12) is provided with an avoidance groove (15) on the groove wall at the middle section; the detection block (2) is provided with a driving groove (21); the driving plate (22) is connected in a sliding and sealing manner in the driving groove (21); a driving rod (23) is provided on the side of the driving plate (22) close to the avoidance groove (15); the driving rod (23) passes through the detection block (2); the side of the driving plate (22) facing away from the driving rod (23) is connected to the groove wall of the driving groove (21) via a third spring (24); the space of the driving groove (21) of the driving plate (22) facing away from the driving rod (23) is connected to the inside of the anti-slip groove (32) through the first air hole (25); the anti-slip block (31) is connected to the anti-slip groove (32) in a sliding and sealing manner; the anti-slip block (31) retracts into the corresponding anti-slip groove (32) after the driving plate (22) moves close to the avoidance groove (15).

7. A steel bar performance detector according to claim 6, characterized in that: One of the pressure rods (3) is provided with a locking rod (34) at its upper end; the other pressure rod (3) is provided with a driven groove (35) at its upper end; the driven groove (35) is slidingly sealed and connected to a driven block (36); the upper surface of the driven block (36) is rotatably connected to a screw rod (37); the driven groove (35) is fixedly connected to a hole plate (38) at its upper notch; the screw rod (37) passes through the hole plate (38) and is screwed to the hole plate (38). The screw rod (37) is connected to the locking hook (39) at its upper end; the driven groove (35) is connected to the interior of the driving groove (21) through the second air hole (26); the upper end of the pressure rod (3) is higher than the upper end of the limit seat (4); the upward movement of the driven block (36) can drive the locking hook (39) to rotate forward to hook the locking rod (34), and the downward movement of the driven block (36) can drive the locking hook (39) to reverse and disengage from the locking rod (34).

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