A device for testing the flexural strength of steel fibers used in concrete

Abstract

The present invention relates to a testing device, and in particular to a testing device for the flexural strength of steel fibers for concrete. It is necessary to design a testing device for the flexural strength of steel fibers for concrete that can block the debris ejected by broken steel fibers to avoid accidental injury to the operator. A testing device for the flexural strength of steel fibers for concrete comprises a support seat, a mounting plate and a top plate. The top of the support seat is fixedly connected to the mounting plate, and the top plate is fixedly connected to the middle and rear side of the top of the mounting plate. The present invention pushes the left and right pressure plates to swing backward, and the left and right rotating pressure blocks swing backward to cooperate with the top plate to bend the steel fibers. If the steel fibers break during the test, the grooves of the rotating pressure blocks can block the ejected debris. Since the photoelectric sensor corresponds to the sensing contact, the photoelectric sensor controls the pressure sensor to read the data and upload it to the computer. In this way, when the steel fibers break, the ejected debris can be blocked to avoid the ejected debris from accidentally injuring the operator.

Description

Technical Field

[0001] The invention relates to a testing device, in particular to a testing device for the flexural strength of steel fibers used in concrete. Background Art

[0002] At present, in order to ensure the reliability of subsequent use, most steel fibers need to be tested for their performance before leaving the factory or before use. An important part of quality inspection is to conduct a bending test on the steel fibers using a bending testing machine. During the test, the repeated bending performance, fatigue resistance and other data of the steel fibers can be detected.

[0003] Chinese patent publication number CN217466445U discloses a steel fiber bending test device, including a bottom plate, side plates, a top plate, a lower clamping block, an upper clamping block, a bracket, a support plate, a chuck, a control plate, a stretching rod, a stretching motor, a tension sensor, a baffle, a bending motor, a telescopic rod, a sphere, a controller, a display screen, a button and a bending sensor. Although the above patent can bend steel fibers, since the steel fibers are exposed to the outside, if the steel fibers break during the test, the debris generated by the breakage can easily burst out and cause harm to the staff operating the equipment.

[0004] Based on the defects in the existing technology, we propose a concrete steel fiber flexural strength testing device that can block the debris ejected by broken steel fibers to avoid accidental injury to the operator. Summary of the Invention

[0005] In order to overcome the disadvantage that although the above patent can bend steel fibers, once the steel fibers break during the test, the debris generated by the breakage is easily ejected and causes harm to the staff operating the equipment, the present invention provides a concrete steel fiber flexural strength testing device that can block the debris ejected by the steel fiber breakage to avoid accidental injury to the operator.

[0006] Technical solution:

[0007] A device for testing the flexural strength of steel fiber for concrete includes a support base, a mounting plate and a top plate. The top of the support base is fixedly connected to the mounting plate, and the top plate is fixedly connected to the middle and rear side of the top of the mounting plate. The device also includes a pressure sensing mechanism and an angle sensing mechanism. The mounting plate is provided with a pressure sensing mechanism for recording steel fiber flexural data, and the mounting plate is also provided with an angle sensing mechanism for controlling the operation of the pressure sensing mechanism.

[0008] In addition, it is particularly preferred that the pressure sensing mechanism includes a mounting seat, a rotating rod, a rotating pressure block, a pressure sensor and a pressure plate, the mounting seat is fixedly connected to the middle of the top of the mounting plate, the rotating rod is symmetrically rotated on the left and right rear of the mounting seat, the middle of the left and right rotating rods are fixed with rotating pressure blocks, the left and right rotating pressure blocks are fixed with pressure sensors, and the front sides of the left and right pressure sensors are fixed with pressure plates.

[0009] In addition, it is particularly preferred that a groove for limiting the position of the steel fiber is provided on the lower side of the rotating pressing block.

[0010] In addition, it is particularly preferred that the angle sensing mechanism includes a photoelectric sensor, a stand and a sensing contact, a photoelectric sensor is fixedly connected to the middle of the top of the left and right pressure sensors, the photoelectric sensor is electrically connected to the pressure sensor, and the stand is fixedly connected symmetrically on the left and right sides of the top rear side of the mounting plate, and three sensing contacts are fixedly connected to the inner sides of the left and right stands at intervals.

[0011] The gear train is connected to the first gear and the gear is connected to the first gear of the driving mechanism, and the gear train is connected to the first gear of the driving mechanism, and the gear train is connected to the first gear of the driving mechanism.

[0012] In addition, it is particularly preferred that an auxiliary positioning mechanism for centering the steel fiber is also included, the auxiliary positioning mechanism includes a second rotating shaft, a rotating shift block, a limiting plate, a coil spring, a rotating column and a second column gear, and the left and right rear parts of the mounting plate are rotatably provided with a second rotating shaft, and the upper parts of the left and right second rotating shafts are fixed with rotating shift blocks for centering the steel fiber, and the limiting plates are symmetrically fixed to the left and right rear parts of the top of the mounting plate, and the left and right limiting plates are in contact with the left and right rotating shift blocks respectively, and the left and right second rotating shafts are connected to the mounting plate with a coil spring, and a rotating column is rotatably provided on the right rear side of the bottom of the mounting plate, and the rotating column and the left second rotating shaft are driven by a synchronous belt, and the lower part of the rotating column and the lower part of the right second rotating shaft are fixed with a second column gear, and the two second column gears are meshed with each other.

[0013] In addition, it is particularly preferred that a storage mechanism for storing steel fibers to be tested is also included, and the storage mechanism includes a mounting frame, a drawer and a handle. The mounting frame is fixedly connected to the top of the support base, and a drawer is slidably placed in the mounting frame, and a handle is fixedly connected to the right side outside the drawer.

[0014] In addition, it is particularly preferred that a limiting mechanism is also included for preventing the rotating top block from swinging excessively. The limiting mechanism includes a vertical plate and a limiting rod. The vertical plate is symmetrically fixed to the left and right sides of the middle top of the mounting plate. The vertical plate is located in front of the rotating pressure block. Three limiting rods are fixed to the left and right vertical plates at intervals to prevent the rotating top block from swinging excessively.

[0015] The beneficial effects of the present invention are:

[0016] 1. Push the left and right pressure plates to swing backward, and the left and right rotating pressure blocks swing backward to cooperate with the top plate to bend the steel fiber. If the steel fiber breaks during the test, the groove of the rotating pressure block can block the ejected debris. In this way, when the steel fiber breaks, the ejected debris can be blocked to prevent the debris from being ejected and accidentally injuring the operator.

[0017] 2. Under the action of the pressure mechanism, the servo motor is started to rotate forward, and the rotating top blocks on the left and right sides respectively drive the left and right pressure plates to swing backward, so that the rotating pressure blocks on the left and right sides swing backward to cooperate with the top plate to bend the steel fiber. In this way, there is no need to manually push the rotating pressure blocks, which is convenient and quick.

[0018] 3. Under the action of the auxiliary positioning mechanism, the left and right sides of the rotating blocks swing inward to center the steel fiber, so as to avoid the steel fiber being placed in the wrong place and affecting the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure from the first viewing angle of the present invention.

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure from a second viewing angle of the present invention.

[0021] Figure 3 It is a partial three-dimensional structural schematic diagram of the present invention.

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the pressure sensing mechanism of the present invention.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the angle sensing mechanism of the present invention.

[0024] Figure 6 It is a schematic diagram of the three-dimensional structure of the pressurizing mechanism of the present invention.

[0025] Figure 7This is a schematic diagram of a first partial three-dimensional structure of the auxiliary positioning mechanism of the present invention.

[0026] Figure 8 This is a schematic diagram of a second partial three-dimensional structure of the auxiliary positioning mechanism of the present invention.

[0027] Figure 9 It is a schematic diagram of the three-dimensional structure of the material storage mechanism of the present invention.

[0028] Figure 10 It is a schematic diagram of the three-dimensional structure of the limiting mechanism of the present invention.

[0029] Among them, the above-mentioned drawings include the following drawing marks: 1: support base, 2: mounting plate, 3: top plate, 4: pressure sensing mechanism, 41: mounting base, 42: rotating rod, 43: rotating pressure block, 44: pressure sensor, 45: pressure plate, 5: angle sensing mechanism, 51: photoelectric sensor, 52: stand, 53: sensing contact, 6: pressurizing mechanism, 61: servo motor, 62: first rotating shaft, 63: first column gear, 64: arc rod, 65: rotating top block, 66: pressurizing spring, 67: arc rack, 68: gear ring, 7: auxiliary positioning mechanism, 71: second rotating shaft, 72: rotating dial block, 73: limiting plate, 74: coil spring, 75: rotating column, 76: second column gear, 8: storage mechanism, 81: mounting frame, 82: drawer, 83: handle, 9: limiting mechanism, 91: stand, 92: limiting rod. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention but are not intended to limit the present invention.

[0031] Example 1

[0032] A device for testing the flexural strength of steel fibers used in concrete, such as Figure 1-Figure 5 As shown, it includes a support base 1, a mounting plate 2, a top plate 3, a pressure sensing mechanism 4 and an angle sensing mechanism 5. The mounting plate 2 is fixedly connected to the top of the support base 1, and the top plate 3 is fixedly connected to the middle and rear side of the top of the mounting plate 2. The mounting plate 2 is provided with a pressure sensing mechanism 4, which can record the steel fiber bending resistance data. The mounting plate 2 is also provided with an angle sensing mechanism 5, which can control the operation of the pressure sensing mechanism 4.

[0033] like Figure 1-Figure 4As shown, the pressure sensing mechanism 4 includes a mounting seat 41, a rotating rod 42, a rotating pressure block 43, a pressure sensor 44 and a pressure plate 45. The mounting seat 41 is fixedly connected to the middle of the top of the mounting plate 2, and the rotating rod 42 is symmetrically rotated on the left and right sides of the rear of the mounting seat 41. The middle of the rotating rods 42 on both sides are fixedly connected to the rotating pressure blocks 43. The lower side of the rotating pressure blocks 43 is provided with a groove for limiting the steel fiber. The pressure sensors 44 are fixedly connected to the rotating pressure blocks 43 on both sides, and the front sides of the pressure sensors 44 on both sides are fixedly connected to the pressure plates 45.

[0034] like Figure 1 、 Figure 2 、 Figure 3 and Figure 5 As shown, the angle sensing mechanism 5 includes a photoelectric sensor 51, a stand 52 and a sensing contact 53. The photoelectric sensor 51 is fixedly connected to the middle of the top of the left and right pressure sensors 44. The photoelectric sensor 51 is electrically connected to the pressure sensor 44. The stand 52 is fixedly connected symmetrically on the left and right sides of the top rear side of the mounting plate 2. Three sensing contacts 53 are fixedly connected to the inner sides of the left and right stand 52 at intervals.

[0035] First, the operator puts the steel fiber between the left and right rotating pressure blocks 43, and the steel fiber contacts the top plate 3. Then, the operator pushes the left and right pressure plates 45 to swing backward. The left and right pressure plates 45 swing backward and respectively drive the left and right pressure sensors 44 to swing backward. The left and right pressure sensors 44 swing backward and respectively drive the left and right rotating pressure blocks 43 to swing backward. The left and right rotating pressure blocks 43 swing backward and cooperate with the top plate 3 to bend the steel fiber. Since the lower side of the rotating pressure block 43 is provided with a groove matching the steel fiber, the rotating pressure block 43 can limit the steel fiber. If the steel fiber breaks during the test, the groove of the rotating pressure block 43 can block the ejected debris to prevent the ejected debris from causing harm to the operator. At the same time, the left and right pressure sensors 44 swing backward and respectively drive the left and right photoelectric sensors The device 51 moves backward, and the left and right photoelectric sensors 51 move backward respectively corresponding to the first sensing contacts 53 on the left and right sides, and the steel fiber bends 10 degrees. The photoelectric sensor 51 controls the pressure sensor 44 to read the data and upload it to the computer. Similarly, continue to bend the steel fiber according to the above operation, and then the left and right photoelectric sensors 51 move backward respectively corresponding to the second or third sensing contacts 53 on the left and right sides, and the steel fiber bends 20 degrees or 30 degrees. The photoelectric sensor 51 controls the pressure sensor 44 to read the data again and upload it to the computer. After the steel fiber test is completed, pull the left and right rotating pressure blocks 43 to swing forward and reset to a vertical state, and then remove the steel fiber for subsequent processing, and you can view the data. The pressure data and angle data can be used to know whether the steel fiber flexural strength is qualified.

[0036] Example 2

[0037] On the basis of Example 1, Figure 1 、 Figure 2 and Figure 6 As shown, a pressurizing mechanism 6 is also included. The pressurizing mechanism 6 includes a servo motor 61, a first rotating shaft 62, a first column gear 63, an arc rod 64, a rotating top block 65, a pressurizing spring 66, an arc rack 67 and a gear ring 68. The servo motor 61 is fixedly connected to the front side of the bottom of the mounting plate 2. A first rotating shaft 62 is rotatably provided in the middle of the front of the mounting plate 2. The first rotating shaft 62 is fixedly connected to the output shaft of the servo motor 61. The first column gear 63 is fixedly connected to the upper part of the first rotating shaft 62. The front side surfaces of the left and right pressure plates 45 are fixedly connected to the arc rod 64. A rotating top block 65 is slidably provided on the arc-shaped rods 64 on both sides. The left and right rotating top blocks 65 are respectively rotatably connected to the left and right rotating rods 42. A pressure spring 66 is connected between the left and right rotating top blocks 65 and the left and right pressure plates 45 respectively. The left and right pressure springs 66 are respectively sleeved on the left and right arc-shaped rods 64. An arc-shaped rack 67 is fixed to the front side of the top of the right rotating top block 65. The arc-shaped rack 67 is meshed with the first column gear 63. A gear ring 68 is fixed to the rear of the left and right rotating top blocks 65. The left and right gear rings 68 are meshed with each other.

[0038] like Figure 1 、 Figure 2 、 Figure 7 and Figure 8 As shown, it also includes an auxiliary positioning mechanism 7, which includes a second rotating shaft 71, a rotating shift block 72, a limiting plate 73, a coil spring 74, a rotating column 75 and a second column gear 76. The second rotating shaft 71 is rotatably provided at the left and right rear ends of the mounting plate 2. The upper ends of the second rotating shafts 71 on the left and right sides are fixedly connected to the rotating shift blocks 72. The rotating shift blocks 72 can realize the center positioning of the steel fiber. The limiting plates 73 are symmetrically fixed to the left and right rear ends of the top of the mounting plate 2. The left and right limiting plates 73 are in contact with the left and right rotating shift blocks 72 respectively. The second rotating shafts 71 on the left and right sides are both connected to the mounting plate 2 with a coil spring 74. The right rear end of the bottom of the mounting plate 2 is rotatably provided with a rotating column 75. The rotating column 75 and the left second rotating shaft 71 are driven by a synchronous belt. The lower part of the rotating column 75 and the lower part of the right second rotating shaft 71 are fixedly connected to the second column gear 76, and the two second column gears 76 mesh with each other.

[0039] When the steel fiber bending resistance test is performed, the servo motor 61 is started to rotate forward, and the forward rotation of the servo motor 61 drives the first rotating shaft 62 to rotate forward, and the forward rotation of the first rotating shaft 62 drives the first column gear 63 to rotate forward, and the forward rotation of the first column gear 63 drives the arc rack 67 to move right, and the rightward movement of the arc rack 67 drives the right rotating top block 65 to swing right, and the right pressure spring 66 is compressed. At the same time, the right rotating top block 65 swings to the right and drives the right gear ring 68 to reverse, and the right gear ring 68 reverses and drives the left gear ring 68 to rotate forward, and the left gear ring 68 rotates forward and drives the left rotating top block 65 to swing left , the left pressure spring 66 is compressed, and then after the pressure spring 66 is compressed to the maximum stroke, the left and right rotating top blocks 65 respectively drive the left and right pressure plates 45 to swing backward, so that the left and right rotating pressure blocks 43 swing backward to cooperate with the top plate 3 to bend the steel fiber. After the steel fiber test is completed, the servo motor 61 is started to reverse, and the left and right rotating top blocks 65 respectively drive the left and right pressure plates 45 to swing forward and reset through the left and right pressure springs 66, and the left and right rotating pressure blocks 43 also swing forward and reset. In this way, there is no need to manually push the rotating pressure block 43, which is convenient and quick.

[0040] When the steel fiber is placed between the left and right rotating pressure blocks 43, the right rotating selector block 72 is pulled to swing left, and the right rotating selector block 72 swings left to drive the right second rotating shaft 71 to rotate forward, the right coil spring 74 is compressed, and the right second rotating shaft 71 rotates forward through the two second column gears 76 to drive the rotating column 75 to reverse, and the rotating column 75 drives the left second rotating shaft 71 to reverse through the synchronous belt transmission, the left coil spring 74 is compressed, and the left second rotating shaft 71 reverses and drives the left rotating selector block 72 to swing right, so that the left and right rotating selector blocks 72 swing inward to center the steel fiber. After the steel fiber is centered, the right rotating selector block 72 is released. Due to the action of the coil spring 74, the left and right second rotating shafts 71 respectively drive the left and right rotating selector blocks 72 to swing outward and reset. In this way, it is avoided that the steel fiber is not placed in place and affects the test effect.

[0041] Example 3

[0042] On the basis of Example 1 and Example 2, Figure 1 、 Figure 2 and Figure 9 As shown, it also includes a material storage mechanism 8, which includes a mounting frame 81, a drawer 82 and a handle 83. The mounting frame 81 is fixedly connected to the top of the support base 1, and a drawer 82 is slidably placed in the mounting frame 81. The handle 83 is fixedly connected to the right side of the drawer 82.

[0043] like Figure 1 、 Figure 2 and Figure 10As shown, it also includes a limiting mechanism 9, which includes a vertical plate 91 and a limiting rod 92. The vertical plate 91 is symmetrically fixed to the left and right sides of the middle top of the mounting plate 2. The vertical plate 91 is located in front of the rotating pressure block 43. Three limiting rods 92 are fixed to the vertical plates 91 on both sides at intervals. The limiting rods 92 can prevent the rotating top block 65 from swinging excessively.

[0044] When people use this device, the operator can use the handle 83 to drive the drawer 82 to move to the right, then put an appropriate amount of steel fiber into the drawer 82, and then push the drawer 82 to move to the left to reset. If the steel fiber needs to be tested for bending resistance, the steel fiber can be taken out for testing according to the above operation. In this way, the steel fiber to be tested can be conveniently stored.

[0045] When the steel fiber is tested, the left and right limiting rods 92 respectively limit the left and right rotating top blocks 65, thereby preventing the left and right rotating top blocks 65 from swinging excessively.

[0046] The above embodiments are provided to persons familiar with the art for implementing or using the present invention. Personnel familiar with the art may make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the scope of protection of the present invention is not limited to the above embodiments, but should be the maximum scope of the innovative features mentioned in the claims.

Claims

1. A concrete steel fiber flexural strength testing device, comprising a support base (1), a mounting plate (2) and a top plate (3), wherein the top of the support base (1) is fixedly connected to the mounting plate (2), and the top plate (3) is fixedly connected to the middle and rear side of the top of the mounting plate (2), characterized in that: It also includes a pressure sensing mechanism (4) and an angle sensing mechanism (5), wherein the mounting plate (2) is provided with a pressure sensing mechanism (4) for recording the steel fiber bending resistance data, and the mounting plate (2) is also provided with an angle sensing mechanism (5) for controlling the operation of the pressure sensing mechanism (4); The pressure sensing mechanism (4) includes a mounting seat (41), a rotating rod (42), a rotating pressure block (43), a pressure sensor (44) and a pressure plate (45). The mounting seat (41) is fixedly connected to the middle of the top of the mounting plate (2). The rear portion of the mounting seat (41) is provided with a rotating rod (42) symmetrically rotating on the left and right. The middle portions of the rotating rods (42) on both sides are fixedly connected to rotating pressure blocks (43). The rotating pressure blocks (43) on both sides are fixedly connected to pressure sensors (44). The front side surfaces of the pressure sensors (44) on both sides are fixedly connected to pressure plates (45). A groove for limiting the position of the steel fiber is provided on the lower side of the rotating pressing block (43); The device further includes a pressure mechanism (6) for providing power to move and rotate the pressure block (43). The pressure mechanism (6) includes a servo motor (61), a first rotating shaft (62), a first column gear (63), an arc rod (64), a rotating top block (65), a pressure spring (66), an arc rack (67) and a gear ring (68). The servo motor (61) is fixedly connected to the front side of the bottom of the mounting plate (2). The first rotating shaft (62) is rotatably provided in the middle of the front of the mounting plate (2). The first rotating shaft (62) is fixedly connected to the output shaft of the servo motor (61). The first column gear (63) is fixedly connected to the upper part of the first rotating shaft (62). The front side surfaces of the left and right pressure plates (45) are both fixedly connected. There is an arc rod (64), and a rotating top block (65) is slidably provided on the left and right arc rods (64). The left and right rotating top blocks (65) are respectively rotatably connected to the left and right rotating rods (42). The left and right rotating top blocks (65) are respectively connected to the left and right pressure plates (45) with pressure springs (66). The left and right pressure springs (66) are respectively sleeved on the left and right arc rods (64). The front side of the top of the right rotating top block (65) is fixed with an arc rack (67), and the arc rack (67) is meshed with the first column gear (63). The rear parts of the left and right rotating top blocks (65) are fixed with gear rings (68), and the left and right gear rings (68) are meshed with each other.

2. A flexural strength testing device for steel fiber used in concrete according to claim 1, characterized in that: The angle sensing mechanism (5) includes a photoelectric sensor (51), a stand (52) and a sensing contact (53). The photoelectric sensor (51) is fixedly connected to the middle of the top of the left and right pressure sensors (44). The photoelectric sensor (51) is electrically connected to the pressure sensor (44). The stand (52) is fixedly connected to the left and right symmetrical sides of the top rear side of the mounting plate (2). Three sensing contacts (53) are fixedly connected to the inner sides of the left and right stand (52) at intervals.

3. A concrete steel fiber flexural strength testing device according to claim 2, characterized in that: The auxiliary positioning mechanism (7) is also included for centering the steel fiber. The auxiliary positioning mechanism (7) includes a second rotating shaft (71), a rotating shift block (72), a limiting plate (73), a coil spring (74), a rotating column (75) and a second column gear (76). The second rotating shaft (71) is rotatably provided at the rear of the left and right sides of the mounting plate (2). The upper parts of the second rotating shafts (71) on the left and right sides are fixed with rotating shift blocks (72) for centering the steel fiber. The limited plate (73) is symmetrically fixed to the rear of the top of the mounting plate (2). The position plate (73) and the limit plates (73) on the left and right sides are in contact with the rotating blocks (72) on the left and right sides respectively. The second rotating shafts (71) on the left and right sides are connected to the mounting plate (2) with a coil spring (74). The right rear side of the bottom of the mounting plate (2) is rotatably provided with a rotating column (75). The rotating column (75) and the left second rotating shaft (71) are driven by a synchronous belt. The lower part of the rotating column (75) and the lower part of the right second rotating shaft (71) are fixedly connected with a second column gear (76), and the two second column gears (76) are meshed with each other.

4. A flexural strength testing device for steel fiber for concrete according to claim 3, characterized in that: The invention also includes a storage mechanism (8) for storing steel fibers to be tested, wherein the storage mechanism (8) includes a mounting frame (81), a drawer (82) and a handle (83), wherein the mounting frame (81) is fixedly connected to the top of the support base (1), the drawer (82) is slidably placed in the mounting frame (81), and the handle (83) is fixedly connected to the right side of the drawer (82).

5. A flexural strength testing device for steel fiber for concrete according to claim 4, characterized in that: The invention also includes a limiting mechanism (9) for preventing the rotating top block (65) from swinging excessively. The limiting mechanism (9) includes a vertical plate (91) and a limiting rod (92). The vertical plate (91) is fixedly connected symmetrically to the middle of the top of the mounting plate (2). The vertical plate (91) is located in front of the rotating pressure block (43). Three limiting rods (92) for preventing the rotating top block (65) from swinging excessively are fixedly connected to the vertical plates (91) on both sides at intervals.

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