A reinforcing bar tensile test clamping device

Abstract

The utility model relates to reinforcing steel bar tensile test technical field discloses a reinforcing steel bar tensile test clamping device, including lower casing, upper casing, the left and right two side outer walls of lower casing, upper casing all are fixedly arranged with connecting plate, and the connecting plate on lower casing, upper casing passes through bolt dismounting setting, the both ends of reinforcing steel bar are fixed in the mode of inserting from the through hole on the sliding seat after bending, and the inclined guide body can guide reinforcing steel bar, so that the clamp between reinforcing steel bar curved end and reinforcing steel bar straight section is less than ninety degrees, can effectively avoid reinforcing steel bar from the through hole and separate, and cooperate four groups of pressure plate to press the reinforcing steel bar, ensure the clamping effect to reinforcing steel bar, when clamping the reinforcing steel bar with the convex rib, can only adopt the pressure plate and carry out clamping, the inclined clamping convex on the pressure plate can be clamped into the convex rib of reinforcing steel bar at this moment, further improve the clamping effect to reinforcing steel bar.

Description

Technical Field

[0001] This utility model relates to the field of steel bar tensile testing technology, specifically a steel bar tensile testing clamping device. Background Technology

[0002] Steel reinforcement is a commonly used and essential material in construction engineering, and its mechanical properties directly affect the safety and reliability of building structures. Tensile testing is one of the important methods for detecting the mechanical properties of steel reinforcement, obtaining key indicators such as yield strength, tensile strength, and elongation. During the tensile test, clamping devices are used to fix both ends of the steel reinforcement, and then tensile force is applied to the steel reinforcement using tensile equipment until it breaks. However, not all reinforcing bars have raised ribs on the outside. Most structural reinforcing bars, stirrups, and auxiliary reinforcing bars have smooth outer surfaces. When clamped, they are prone to loose clamping, and the reinforcing bars can easily fall out of the clamping device during tensioning. Utility Model Content

[0003] The purpose of this invention is to provide a clamping device for steel bar tensile testing to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a steel bar tensile test clamping device, comprising a lower shell and an upper shell, wherein connecting plates are fixedly installed on the left and right outer walls of the lower shell and the upper shell, and the connecting plates on the lower shell and the upper shell are detached and installed by bolts; a sliding groove is provided on the inner side of the lower shell and the upper shell, and a sliding seat is slidably installed in the sliding groove; a through hole for passing through the steel bar is provided in the sliding seat, and an inclined guide is fixedly installed in the through hole; the inclined guide guides the steel bar passing through the through hole; a clamping plate is provided on the inner side of the lower shell and the upper shell; a spiral propulsion assembly for adjusting the position of the clamping plate is provided on the lower shell and the upper shell, and there are four sets of clamping plates in the lower shell and the upper shell; an integrally formed inclined clamping protrusion is provided on the contact surface between the clamping plate and the steel bar.

[0005] Furthermore, the spiral propulsion assembly is provided with upper and lower sets. The spiral propulsion assembly includes a lead screw, and the outer wall of the lead screw is threaded with an internal thread sleeve. The upper internal thread sleeve is fixedly connected to the inner wall of the upper housing, and the lower internal thread sleeve is fixedly connected to the inner wall of the lower housing. One end of the lead screw is rotatably connected to the outer wall of the pressure plate through a bearing, and the other end of the lead screw is fixedly installed with a throttle handle.

[0006] Furthermore, a U-shaped connecting seat is fixedly installed on the side of both the lower and upper shells, and a stretching machine connecting component is fixedly installed on the end of the U-shaped connecting seat away from the lower and upper shells.

[0007] Furthermore, each of the pressing plates has a sliding rod fixedly installed on its outer wall, and a guide tube is slidably sleeved on the outer wall of the sliding rod. The lower guide tube is fixedly connected to the inner wall of the lower housing, and the upper guide tube is fixedly connected to the inner wall of the upper housing.

[0008] Furthermore, the outer side of the U-shaped connector is provided with a U-shaped bending groove.

[0009] Furthermore, the stretching machine connecting component includes a fixed plate, the outer wall of which is fixedly connected to a U-shaped connecting seat, a bearing seat fixedly installed on the inner wall of the fixed plate, a connecting bearing fixedly installed inside the bearing seat, a connecting column fixedly installed on the inner ring of the connecting bearing, and threaded rods installed at both ends of the connecting column.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. The steel bar is fixed by bending both ends and inserting them into the through holes on the sliding seat. The inclined guide body guides the steel bar, ensuring that the angle between the bent end and the straight section of the steel bar is less than 90 degrees. This effectively prevents the steel bar from detaching from the through holes. At the same time, four sets of clamping plates are used to clamp the steel bar, ensuring the clamping effect. When clamping steel bars with raised ribs, only the clamping plates can be used. In this case, the inclined clamping protrusions on the clamping plates will engage with the raised ribs of the steel bar, further improving the clamping effect. 2. For smooth and thick steel bars, the steel bars can be bent and inserted into the U-shaped bending groove, and then a clamping plate can be used to press and fix the steel bars, which can also ensure the stability of the clamping of the steel bars. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This utility model Figure 1 A structural schematic diagram of the front sectional view; Figure 3 This is a schematic diagram of the structure of the clamping plate and the spiral propulsion assembly of this utility model; Figure 4 This is a structural schematic diagram of the U-shaped connecting seat and the connecting component of the stretching machine of this utility model.

[0012] In the diagram: 1. Lower housing; 2. Upper housing; 3. Connecting plate; 4. Pressing plate; 401. Inclined clamping protrusion; 5. Slide groove; 6. Sliding seat; 7. Inclined guide body; 8. Screw propulsion assembly; 801. Lead screw; 802. Internal threaded sleeve; 803. Rotary handle; 9. Guide tube; 10. Slide rod; 11. U-shaped connecting seat; 1101. U-shaped bending groove; 12. Stretching machine connecting parts; 1201. Fixing plate; 1202. Bearing seat; 1203. Connecting bearing; 1204. Connecting column; 1205. Threaded rod. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0014] Please see Figures 1-4 This utility model provides a technical solution: a steel bar tensile test clamping device, including a lower shell 1 and an upper shell 2. Connecting plates 3 are fixedly installed on the left and right outer walls of both the lower shell 1 and the upper shell 2, and the connecting plates 3 on the lower shell 1 and the upper shell 2 are detached and installed by bolts. Sliding grooves 5 are opened on the inner sides of both the lower shell 1 and the upper shell 2, and sliding seats 6 are slidably installed in the sliding grooves 5. Through holes for passing steel bars are opened in the sliding seats 6, and inclined guide bodies 7 are fixedly installed in the through holes to guide the steel bars passing through the through holes. Pressure plates 4 are provided on the inner sides of both the lower shell 1 and the upper shell 2, and spiral propulsion components 8 for adjusting the position of the pressure plates 4 are provided on both the lower shell 1 and the upper shell 2. There are four sets of pressure plates 4 in total in the lower shell 1 and the upper shell 2. An integrally formed inclined clamping protrusion 401 is provided on the contact surface between the clamping plate 4 and the reinforcing bar. Since the reinforcing bar used as an auxiliary component is not only smooth but also generally thin, it can be fixed by bending both ends of the reinforcing bar and inserting it into the through hole on the sliding seat 6. The inclined guide body 7 can guide the reinforcing bar so that the clamp between the bent end of the reinforcing bar and the straight section of the reinforcing bar is less than 90 degrees, which can effectively prevent the reinforcing bar from coming out of the through hole. At the same time, it works with four sets of clamping plates 4 to clamp the reinforcing bar and ensure the clamping effect of the reinforcing bar. When clamping the reinforcing bar with raised ribs, only the clamping plate 4 can be used for clamping. At this time, the inclined clamping protrusion 401 on the clamping plate 4 will be inserted into the raised ribs of the reinforcing bar, further improving the clamping effect of the reinforcing bar. The screw propulsion assembly 8 is provided with upper and lower sets. The screw propulsion assembly 8 includes a lead screw 801. The outer wall of the lead screw 801 is threaded with an inner thread sleeve 802. The upper inner thread sleeve 802 is fixedly connected to the inner wall of the upper housing 2, and the lower inner thread sleeve 802 is fixedly connected to the inner wall of the lower housing 1. One end of the lead screw 801 is rotatably connected to the outer wall of the pressure plate 4 through a bearing. The other end of the lead screw 801 is fixedly installed with a handle 803. By rotating the lead screw 801, the lead screw 801 moves along the inner thread sleeve 802, thereby driving the pressure plate 4 to move, which is used to adjust the position of the pressure plate 4. The handle 803 makes it easier to rotate the lead screw 801. U-shaped connecting seats 11 are fixedly installed on the sides of both the lower housing 1 and the upper housing 2. A stretching machine connecting component 12 is fixedly installed at the end of the U-shaped connecting seat 11 away from the lower housing 1 and the upper housing 2. The U-shaped connecting seat 11 is used to connect the stretching machine connecting component 12 to the lower housing 1 and the upper housing 2. The stretching machine connecting component 12 is used to connect the stretching end of the stretching machine to the U-shaped connecting seat 11, thereby connecting the clamp composed of the lower housing 1 and the upper housing 2 to the stretching end of the stretching machine. All outer walls of the clamping plate 4 are fixedly equipped with sliding rods 10. The outer walls of the sliding rods 10 are slidably fitted with guide tubes 9. The lower guide tube 9 is fixedly connected to the inner wall of the lower housing 1, and the upper guide tube 9 is fixedly connected to the inner wall of the upper housing 2. The guide tubes 9 and sliding rods 10 are set to guide the clamping plate 4, so that when the screw 801 is rotated, the clamping plate 4 will not rotate with the screw 801, thereby ensuring that the clamping plate 4 is parallel to the central axis of the reinforcing bar, and thus ensuring that the clamping plate 4 can press better on the outer wall of the reinforcing bar. The outer side of the U-shaped connector 11 is provided with a U-shaped bending groove 1101. For steel bars with smooth surfaces and relatively thick bars, the steel bars can be bent and inserted into the U-shaped bending groove 1101, and then the clamping plate 4 is used to clamp and fix the steel bars, which can also ensure the stability of the clamping of the steel bars. The stretching machine connecting component 12 includes a fixed plate 1201. The outer wall of the fixed plate 1201 is fixedly connected to the U-shaped connecting seat 11. A bearing seat 1202 is fixedly installed on the inner wall of the fixed plate 1201. A connecting bearing 1203 is fixedly installed inside the bearing seat 1202. A connecting column 1204 is fixedly installed on the inner ring of the connecting bearing 1203. Threaded rods 1205 are installed at both ends of the connecting column 1204. Because the fixed plate 1201 and the connecting column 1204 are connected by the bearing seat 1202 and the connecting bearing 1203, the connecting column 1204 can rotate, which in turn allows the threaded rods 1205 to rotate. When threading the connecting end of the stretching machine to the threaded rods 1205, only the threaded rods 1205 need to be rotated, reducing the complexity of installation and improving the ease of installation.

[0015] Working principle: In use, connect the stretching end of the stretching machine to the left and right sets of stretching machine connecting parts 12 respectively. During connection, align the threaded rod 1205 with the connecting end, and then rotate the threaded rod 1205 to screw it in. When clamping steel bars with raised ribs, simply pass the steel bar through the left and right clamps, and then rotate the eight screws 801 respectively to adjust the position of the eight clamping plates 4, so that the clamping plates 4 clamp the steel bar, and the inclined clamping protrusions 401 on the clamping plates 4 also engage with the raised ribs, thereby achieving the clamping of the steel bar. When clamping thinner and smooth-surfaced steel bars, it can... The two ends of the reinforcing bar are bent, and then the reinforcing bar is passed through the through hole on the sliding seat 6. The inclined guide body 7 can guide the reinforcing bar so that the clamp between the bent end of the reinforcing bar and the straight section of the reinforcing bar is less than 90 degrees, which can effectively prevent the reinforcing bar from coming out of the through hole. At the same time, the four sets of clamping plates 4 are used to clamp the reinforcing bar. For thicker and smooth reinforcing bars, the lower shell 1 and the upper shell 2 can be separated after the reinforcing bar is bent. The bent end of the reinforcing bar is inserted into the U-shaped bending groove 1101, and then the lower shell 1 and the upper shell 2 are put back together. Then the lower shell 1 and the upper shell 2 are fixedly connected. Finally, the four sets of clamping plates 4 are used to clamp the reinforcing bar.

[0016] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

Claims

1. A steel bar tensile test clamping device, comprising a lower shell (1) and an upper shell (2), wherein connecting plates (3) are fixedly provided on the left and right outer walls of the lower shell (1) and the upper shell (2), and the connecting plates (3) on the lower shell (1) and the upper shell (2) are installed and disassembled by bolts, characterized in that: The inner sides of the lower shell (1) and the upper shell (2) are provided with sliding grooves (5), and sliding seats (6) are slidably arranged in the sliding grooves (5). The sliding seats (6) are provided with through holes for passing through the reinforcing bars, and inclined guides (7) are fixedly installed in the through holes. The inclined guides (7) guide the reinforcing bars passing through the through holes. The inner sides of the lower shell (1) and the upper shell (2) are provided with pressing plates (4). The lower shell (1) and the upper shell (2) are provided with spiral propulsion components (8) for adjusting the position of pressing plates (4). There are four sets of pressing plates (4) in the lower shell (1) and the upper shell (2). The contact surface between the pressing plates (4) and the reinforcing bars is provided with an integrally formed inclined clamping protrusion (401).

2. The steel bar tensile test clamping device according to claim 1, characterized in that: The spiral propulsion assembly (8) is provided with two sets, upper and lower. The spiral propulsion assembly (8) includes a lead screw (801). The outer wall of the lead screw (801) is threaded with an inner thread sleeve (802). The upper inner thread sleeve (802) is fixedly connected to the inner wall of the upper housing (2), and the lower inner thread sleeve (802) is fixedly connected to the inner wall of the lower housing (1). One end of the lead screw (801) is rotatably connected to the outer wall of the pressure plate (4) through a bearing. The other end of the lead screw (801) is fixedly installed with a throttle (803).

3. The steel bar tensile test clamping device according to claim 1, characterized in that: U-shaped connecting seats (11) are fixedly installed on the sides of the lower shell (1) and the upper shell (2). A stretching machine connecting component (12) is fixedly installed on the end of the U-shaped connecting seat (11) away from the lower shell (1) and the upper shell (2).

4. The steel bar tensile test clamping device according to claim 1, characterized in that: The outer wall of each pressing plate (4) is fixedly equipped with a sliding rod (10), and the outer wall of the sliding rod (10) is slidably fitted with a guide tube (9). The lower guide tube (9) is fixedly connected to the inner wall of the lower housing (1), and the upper guide tube (9) is fixedly connected to the inner wall of the upper housing (2).

5. A steel bar tensile test clamping device according to claim 3, characterized in that: The outer side of the U-shaped connector (11) is provided with a U-shaped bending groove (1101).

6. A steel bar tensile test clamping device according to claim 3, characterized in that: The stretching machine connecting component (12) includes a fixing plate (1201), the outer wall of the fixing plate (1201) is fixedly connected to the U-shaped connecting seat (11), the inner wall of the fixing plate (1201) is fixedly installed with a bearing seat (1202), the bearing seat (1202) is fixedly installed with a connecting bearing (1203), the inner ring of the connecting bearing (1203) is fixedly installed with a connecting column (1204), and threaded rods (1205) are installed at both the left and right ends of the connecting column (1204).

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