Scissor resistance test clamp for welded steel bar mesh

Abstract

The utility model discloses a steel bar welded mesh anti-shear test fixture, and relates to the technical field of steel bar welded mesh anti-shear test fixtures, the steel bar welded mesh anti-shear test fixture comprises a box body, the top in the box body is fixedly connected with a fixed block, the fixed block is internally and rotatably connected with two groups of rollers, each group of rollers is connected with the fixed block through a rotating shaft, and the rotating shaft is connected with the box body. The axes of the rotating shafts do not coincide with the axes of the rolling wheels, and a coil spring is arranged at the joint of each rotating shaft and the corresponding fixing block. According to the utility model, the bottom of the vertical structure of the steel bar welded mesh is clamped and fixed through the clamping structure, the transverse structure of the steel bar welded mesh is clamped in the middle of each group of rollers, and the position of the transverse structure is fixed, so that the steel bar welded mesh can be tested when the steel bar welded mesh is in a vertical state; external force borne by the rolling wheel disappears, so that the rolling wheel is driven by the coil spring to reset slowly, the splashing phenomenon generated when the steel bar welded mesh is broken is avoided, and the safety and the reusability of the device after the test is finished are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to steel bar welded mesh shear test fixture technical field, concretely is a kind of steel bar welded mesh shear test fixture. BACKGROUND

[0002] Steel bar welded mesh is that longitudinal reinforcement and transverse reinforcement are arranged at certain interval and right angle respectively, and all intersection points are welded together, it is manufactured in factory by cold-rolled ribbed steel bar or cold-rolled plain round steel, and it is suitable for reinforcement of reinforced concrete structure and ordinary reinforcement of prestressed concrete structure, which can improve construction efficiency, ensure structure quality and enhance structure safety, and it is important force to promote the technical progress and development of construction industry.

[0003] In the production and use process of steel bar welded mesh, steel bar welded mesh shear test fixture is usually used to test the shear resistance performance of steel bar welded mesh, its working principle is to clamp the two ends of steel bar welded mesh by fixture head, then external force is applied to fixture by testing machine, so that steel bar welded mesh is sheared and deformed, in the test process, the deformation of welded mesh and the data on testing machine need to be recorded, when welded mesh is damaged, maximum shear force and fracture mode of welded mesh need to be recorded to evaluate its shear resistance performance.

[0004] At present, when steel bar welded mesh shear test fixture is used, the position of vertical structure needs to be fixed by the inner device of fixture first, and then the horizontal structure or vertical structure is moved by lifting structure until they are broken to complete the test.

[0005] However, when horizontal structure and vertical structure of steel bar welded mesh are broken, horizontal structure of steel bar welded mesh is easy to splash, which can hurt operator and reduce safety, and it can also splash and hit device, which can damage device and reduce service life. UTILITY MODEL CONTENTS

[0006] Therefore, the utility model aims to provide a steel bar welded mesh shear test fixture to solve the technical problem that when horizontal structure and vertical structure of steel bar welded mesh are broken, horizontal structure of steel bar welded mesh is easy to splash, which can hurt operator and reduce safety, and it can also splash and hit device, which can damage device and reduce service life.

[0007] To achieve the above object, the utility model provides the following technical scheme: a kind of steel bar welded mesh shear test fixture, including box, the fixed block is fixedly connected in the top of box, two groups of rollers are rotatably connected in the fixed block, each group of roller is connected with the fixed block by pivot, and the axis of pivot and the axis of roller do not coincide, each the pivot and fixed block connection place is provided with coil spring, the surface of each roller is provided with several rubber strips, one side in the box is slidably connected with movable block, and the top of movable block is provided with clamping structure, the box and the movable block are connected by a group of hydraulic cylinders.

[0008] By adopting the above technical scheme, the bottom of the vertical structure of the steel bar welded mesh can be clamped and fixed by the clamping structure, and the horizontal structure of the steel bar welded mesh is placed in the middle position of each group of rollers, then the clamping structure and the vertical structure of the steel bar welded mesh are driven downward by the hydraulic cylinder, so as to drive the horizontal structure of the steel bar welded mesh to move downward and drive the rollers to rotate. Since the axis of the pivot and the axis of the roller do not coincide, the gap between the rollers gradually increases, so that the horizontal structure of the steel bar welded mesh moves downward. When the gap between the rollers increases to a certain extent, the horizontal structure of the steel bar welded mesh is clamped in the middle of each group of rollers, the fixation of the horizontal position of the steel bar welded mesh is realized. When the steel bar welded mesh breaks, the external force on the roller disappears, so that the roller is slowly reset by the coil spring, the splashing phenomenon caused by the breaking of the steel bar welded mesh is avoided, the safety and reusability of the device after the test is ensured, and the service life of the device is prolonged.

[0009] The utility model further provides that the clamping structure includes a chute provided on the top of the movable block, a group of sliding blocks that fit the chute are slidably connected in the chute, a clamping block is fixedly connected to the top of each sliding block, a bidirectional screw rod that fits the sliding blocks is rotatably connected in the chute, one end of the bidirectional screw rod extends to the outside and is connected to the output end of a motor, the motor is installed on the top of a support plate, and the support plate is fixedly connected to one end of the movable block.

[0010] By adopting the above technical scheme, the motor is started to drive the bidirectional screw rod to rotate, so that the sliding blocks and the clamping blocks are synchronously close or away from each other. Therefore, the steel bar welded mesh can be clamped and fixed by the approach of a group of clamping blocks, and the fixed steel bar welded mesh can be taken out by the away of a group of clamping blocks. At the same time, the adjustment of the position of the clamping blocks can adapt to steel bar welded meshes of different sizes, so that the device can be better used.

[0011] The utility model further provides that a group of limiting grooves are provided on one side in the box, a limiting block that fits the limiting groove is slidably connected in each limiting groove, and a group of limiting blocks are fixedly connected to one side of the movable block.

[0012] By adopting the above technical scheme, the limiting groove and the limiting design can limit the movement of the movable block, so that the stability of the movement of the movable block can be increased, and deviation during the movement of the movable block can be avoided, thereby the accuracy of the device in testing the steel bar welded mesh can be improved.

[0013] The utility model further sets up, a group of the clamping block adjacent one side is provided with screw threads.

[0014] By adopting the above technical scheme, the screw thread design can increase the friction between the clamping block and the steel bar welded mesh, thereby enhancing the clamping force, avoiding the steel bar welded mesh from separating from the group of clamping blocks, and affecting the test of the shear resistance of the steel bar welded mesh.

[0015] The utility model further sets up, the bottom of box is provided with rubber pad.

[0016] By adopting the above technical scheme, the screw and the like can be installed in the positioning hole for fixed connection, so that the position of the box can be fixed, the stability of the device can be increased, and the rubber pad can increase the friction between the box and the contact surface, so that the device can be better used.

[0017] The utility model further sets up, the surface of box is connected with movable door through hinge hinge, and the box and movable door are connected through lock catch.

[0018] By adopting the above technical scheme, the box can be opened and closed through the movement of the movable door, so that the safety of the device can be increased when the steel bar welded mesh is detected.

[0019] The utility model further sets up, the movable door is set up transparent material.

[0020] By adopting the above technical scheme, the operator can directly check the test condition of the steel bar welded mesh inside the box through the movable door, without frequently opening and closing the door, so that the device can be better used.

[0021] In summary, the utility model mainly has the following beneficial effects:

[0022] The utility model discloses a clamping structure is to the bottom of vertical structure of steel bar welded net and is fixed, and the transverse structure of steel bar welded net is placed in the middle position of each group of gyro wheel, then through the hydraulic cylinder drive clamping structure and the vertical structure of steel bar welded net downward movement, to drive the transverse structure of steel bar welded net downward movement and drive gyro wheel to rotate, so make the clearance between gyro wheel gradually increase and the transverse structure of steel bar welded net downward movement, when the clearance between gyro wheel increases to a certain degree, the transverse structure of steel bar welded net is stuck in the middle of each group of gyro wheel, realized the fixing of steel bar welded net transverse position, simultaneously when the steel bar welded net breaks, and the external force of gyro wheel disappears and is reset slowly through the coil spring, avoided the splashing phenomenon when the steel bar welded net breaks, ensured the safety and reusability of device after the test, convenient for prolonging the service life of device. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0024] Figure 2 It is the three-dimensional structure internal detail view of the utility model;

[0025] Figure 3 It is the fixed structure detail view of the utility model;

[0026] Figure 4 It is the clamping structure detail view of the utility model;

[0027] Figure 5 It is the gyro wheel structure detail view of the utility model.

[0028] In the drawing: 1, box body;2, swing door;3, lock catch;4, positioning hole;5, rubber pad;6, fixed block;7, gyro wheel;8, rotating shaft;9, coil spring;10, rubber strip;11, movable block;12, hydraulic cylinder;13, sliding groove;14, sliding block;15, clamping block;16, two-way screw;17, motor;18, support plate;19, screw;20, limit slot;21, limit block. DETAILED DESCRIPTION

[0029] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings of the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are used only for explaining the utility model, and cannot be understood as limiting the utility model.

[0030] The embodiments of the utility model will be described below according to the overall structure.

[0031] A kind of steel bar welded net shear cutter test fixture, such as Figures 1-5As shown, including the box 1, the box 1 bottom four corners are provided with positioning hole 4, and the bottom of the box 1 is provided with rubber pad 5, can increase the friction between the box 1 and the contact surface, and can be installed in the positioning hole 4 bolt and other fixed parts, so as to realize the fixation of the box 1 position, convenient to increase the stability of the device use, at the same time, the surface of the box 1 is connected with the movable door 2 through the hinge hinge, and the box 1 and the movable door 2 are connected through the lock buckle 3, the opening and closing of the box 1 can be realized through the activity of the movable door 2, the movable door 2 is set to transparent material, when the movable door 2 is closed to test the reinforcement welded mesh, so that the operator can pass through the test situation between the movable door 2, convenient to increase the safety of the device use.

[0032] Then the fixed block 6 is fixedly connected in the top of the box 1, the two groups of rollers 7 are rotatably connected in the fixed block 6, each group of rollers 7 is connected with the fixed block 6 through the rotating shaft 8, so that the roller 7 rotates on the surface of the fixed block 6, and the axis of the rotating shaft 8 does not coincide with the axis of the roller 7, so that when each group of rollers 7 rotates, the gap between the rollers 7 will become larger, the connecting part between each rotating shaft 8 and the fixed block 6 is provided with the coil spring 9, so that after the external force acting on the roller 7 disappears, the coil spring 9 can drive it to reset, and the connecting part between the rotating shaft 8 and the fixed block 6 is provided with damping, so that the roller 7 can be reset slowly, which is convenient to increase the safety of the device, the surface of each roller 7 is provided with a plurality of rubber strips 10, so as to increase the friction between the roller 7 and the reinforcement welded mesh, one side of the box 1 is slidably connected with the movable block 11, and the top of the movable block 11 is provided with a clamping structure, which can fix the position of the reinforcement welded mesh, the box 1 and the movable block 11 are connected through a group of hydraulic cylinders 12, and the shear resistance of the reinforcement welded mesh can be tested when the movable block 11 and the clamping structure are driven downward by the hydraulic cylinder 12.

[0033] Therefore, during use, the bottom of the vertical structure of the reinforcement welded mesh can be clamped and fixed by the clamping structure, and the horizontal structure of the reinforcement welded mesh is placed in the middle position of each group of rollers 7, at this time, the reinforcement welded mesh is in a vertical state in the box 1, then the clamping structure and the vertical structure of the reinforcement welded mesh are driven downward by the hydraulic cylinder 12, so as to drive the horizontal structure of the reinforcement welded mesh to move downward and drive the roller 7 to rotate, so that the gap between the rollers 7 gradually increases, and the horizontal structure of the reinforcement welded mesh is clamped in the middle of each group of rollers 7, so as to fix the horizontal position of the reinforcement welded mesh, and when the reinforcement welded mesh is broken, the external force acting on the roller 7 disappears, so that the roller 7 is slowly reset by the coil spring 9, avoiding the splashing phenomenon when the reinforcement welded mesh is broken, ensuring the safety and reusability of the device after testing, and prolonging the service life of the device.

[0034] Wherein the clamping structure comprises a sliding groove 13 arranged on the top of the movable block 11, a set of sliding blocks 14 matched with the sliding groove 13 are slidingly connected in the sliding groove 13, the top of each sliding block 14 is fixedly connected with a clamping block 15, a bidirectional screw rod 16 matched with the sliding block 14 is rotatably connected in the sliding groove 13, one end of the bidirectional screw rod 16 is movably penetrated through one end of the sliding groove 13 and extends to the outside and is connected with the output end of the motor 17, starting the motor 17 drives the bidirectional screw rod 16 to rotate, so that the set of sliding blocks 14 can be synchronously approached or moved away, so that when the set of clamping blocks 15 approaches, the bottom of the vertical structure of the steel bar welded mesh can be clamped and fixed, and when the set of clamping blocks 15 moves away, the steel bar welded mesh can be taken out from the box body 1, which is convenient for better use of the device, the motor 17 is installed on the top of the supporting plate 18, and the supporting plate 18 is fixedly connected to one end of the movable block 11, so that the position of the motor 17 can be fixed, and the adjacent side of the set of clamping blocks 15 is provided with a thread 19, the design of the thread 19 can increase the friction between the clamping block 15 and the steel bar welded mesh, thereby increasing the clamping force, avoiding the steel bar welded mesh from separating from the set of clamping blocks 15, and affecting the test of the steel bar welded mesh.

[0035] Meanwhile, a set of limiting grooves 20 are arranged on one side in the box body 1, a limiting block 21 matched with the limiting groove 20 is slidingly connected in each limiting groove 20, and the set of limiting blocks 21 are fixedly connected to one side of the movable block 11, so that the movement of the movable block 11 can be limited by the limiting groove 20 and the limiting block 21, thereby increasing the stability of the movement of the movable block 11, avoiding shaking during movement, and thereby increasing the accuracy of the test of the steel bar welded mesh by the device.

[0036] Although the embodiments of the present application have been shown and described, the specific embodiments are merely illustrative of the present application, and are not intended to limit the application, and the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner, and those skilled in the art can make modifications, replacements and variations of the embodiments without creative contribution after reading the specification, as long as they are within the scope of the claims of the present application.

Claims

1. A shear test jig for welded reinforcement comprising a box (1) characterised in that: The inner top of the box (1) is fixedly connected with a fixed block (6), two groups of rollers (7) are rotatably connected in the fixed block (6), each group of rollers (7) is connected with the fixed block (6) through an axis (8), and the axis of the axis (8) and the axis of the roller (7) are not coincident, a coil spring (9) is arranged at the connection between each axis (8) and the fixed block (6), and a plurality of rubber strips (10) are arranged on the surface of each roller (7), a movable block (11) is slidably connected to one side of the box (1), and a clamping structure is arranged on the top of the movable block (11), and the box (1) and the movable block (11) are connected through a group of hydraulic cylinders (12).

2. A shear test jig for welded reinforcing mesh as claimed in claim 1, characterised in that: The clamping structure comprises a chute (13) arranged on the top of the movable block (11), a group of sliding blocks (14) slidably connected in the chute (13) are matched with the chute (13), a clamping block (15) is fixedly connected to the top of each sliding block (14), a bidirectional screw rod (16) rotatably connected in the chute (13) is matched with the sliding block (14), one end of the bidirectional screw rod (16) extends to the outside and is connected with the output end of the motor (17) through the other end of the chute (13), the motor (17) is installed on the top of the supporting plate (18), and the supporting plate (18) is fixedly connected to one end of the movable block (11).

3. A shear test jig for welded reinforcing mesh as claimed in claim 1, characterised in that: A group of limiting grooves (20) are arranged on one side of the box (1), a limiting block (21) slidably connected in each limiting groove (20) is matched with the limiting groove (20), and a group of limiting blocks (21) are fixedly connected to one side of the movable block (11).

4. A shear test jig for welded reinforcing mesh as claimed in claim 2, characterised in that: A group of the clamping blocks (15) are provided with threads (19) on the adjacent sides.

5. The shears test fixture for welded wire reinforcement according to claim 1, characterized in that: The bottom of the box (1) is provided with positioning holes (4) at the four corners, and the bottom of the box (1) is provided with rubber pads (5).

6. The shears test fixture for welded wire reinforcement according to claim 1, characterized in that: The surface of the box (1) is hingedly connected with a movable door (2), and the box (1) and the movable door (2) are connected through a lock buckle (3).

7. A shear test jig for welded reinforcing mesh as claimed in claim 6 wherein: The movable door (2) is made of transparent material.

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