A device for testing anchoring performance of a group of dowels

Abstract

The utility model belongs to the technical field of anchorage performance test of planted reinforcement group, especially a kind of anchorage performance test device of planted reinforcement group.More particularly, it is provided with a clamping head, a hydraulic cylinder is arranged on the right side of the clamping head, the clamping head is installed on the piston end of the hydraulic cylinder, a mounting hole is formed on the clamping head, the right side aperture of the mounting hole is smaller than the left side aperture, an opening is formed on the hole wall of the mounting hole, two clamping plates are independently arranged in the mounting hole, the outer side wall of the clamping plate is arc-shaped and is attached to the hole wall of the mounting hole.The utility model puts the reinforcing steel bar into the mounting hole from the opening, uses the clamping plate to block the opening, and uses the clamping plate to clamp the reinforcing steel bar, which avoids the need to sleeve or cut the reinforcing steel bar from the far end of the reinforcing steel bar, thereby improving the convenience of the anchorage test of planted reinforcement to a certain extent.

Description

Technical Field

[0001] This utility model belongs to the technical field of anchorage performance testing of rebar groups, and in particular relates to a testing device for anchorage performance of rebar groups. Background Technology

[0002] On construction sites or civil engineering sites, steel bars need to be pre-embedded during construction to ensure strength. When pre-embedding the steel bars, they must be bonded to the wall using special adhesive. After the steel bars are pre-embedded, testing is usually required to check if the quality meets standards; this testing requires specialized instruments.

[0003] As one of the existing products for testing the anchorage performance of rebar groups, the rebar anchorage force tester consists of a hollow hydraulic cylinder and a clamping head. During use, the hollow hydraulic cylinder and clamping head need to be inserted from the end of the rebar. When the exposed rebar is long, the hydraulic cylinder and clamping head need to be inserted from the far end of the rebar, and then moved to the wall so that the hydraulic cylinder is against the wall surface. This process is quite cumbersome. Alternatively, the rebar can be cut closer to the wall to facilitate the insertion of the hydraulic cylinder, and then the rebar can be welded back on after the test. This method not only damages the original strength of the rebar but also makes the entire testing process quite cumbersome. Utility Model Content

[0004] The purpose of this invention is to provide a test device for the anchorage performance of rebar groups, which can improve the convenience of the test work to a certain extent.

[0005] The aforementioned rebar anchorage performance testing device includes a clamping head, a hydraulic cylinder is provided on the right side of the clamping head, the clamping head is installed on the piston end of the hydraulic cylinder, the clamping head has a left and right communicating mounting hole, the diameter of the right side of the mounting hole is smaller than the diameter of the left side of the mounting hole, and an opening communicating with the outside is provided on the wall of the mounting hole; two clamping plates are independently provided in the mounting hole and are clamped together; the outer side wall of the clamping plate is arc-shaped and fits against the wall of the mounting hole.

[0006] Furthermore, a limiting block is fixed to the outer wall of the clamping plate, and a limiting groove is provided on the wall of the mounting hole to slide left and right with the limiting block.

[0007] Furthermore, the clamping surface of the clamping plate is provided with a plurality of interlocking teeth.

[0008] Furthermore, the width of the opening is smaller than the width of the clamping plate.

[0009] Furthermore, one of the clamps was used to seal the opening.

[0010] Furthermore, a positioning clamp is fixed on the cylinder body of the hydraulic cylinder. The positioning clamp is made of elastic material, and the clamping groove of the positioning clamp is on the same straight line as the mounting hole.

[0011] Compared with the prior art, the present invention has the following beneficial effects: This invention improves the convenience of rebar anchorage tests to a certain extent by inserting the rebar into the installation hole from the opening, sealing the opening with a clamp, and holding the rebar with the clamp. This avoids the need to insert or cut the rebar from a distant end. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 A schematic diagram of the left-side view structure; Figure 3 This is a three-dimensional structural diagram of the present invention; Figure 4 This is an exploded structural diagram of the present invention; The components in the diagram are named as follows: 1. Hydraulic cylinder; 2. Clamping head; 3. Engaging teeth; 4. Clamping plate; 5. Positioning clamp; 6. Connecting head; 7. Limiting block; 8. Limiting groove. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0014] Example The anchorage performance testing device for planting rebar groups described in this embodiment, such as Figures 1 to 4 As shown, the device includes a clamping head 2, and a hydraulic cylinder 1 is provided on the right side of the clamping head 2. The clamping head 2 is installed on the piston end of the hydraulic cylinder 1. The hydraulic cylinder 1 is an existing product, which mainly consists of a cylinder body and a piston rod. The clamping head 2 is fixed to the piston end of the piston rod of the hydraulic cylinder 1. The clamping head 2 has a mounting hole that is open to the left and right, and the center line of the mounting hole is parallel to the center line of the hydraulic cylinder 1.

[0015] The diameter of the right side of the mounting hole is smaller than that of the left side, so the overall mounting hole is a conical hole that is smaller on the right and larger on the left. The wall of the mounting hole has an opening that communicates with the outside. When in use, the reinforcing bar can be inserted into the mounting hole through the opening without having to insert it from the end of the reinforcing bar, which improves the convenience of the work to a certain extent.

[0016] Two clamping plates 4 are independently installed inside the mounting hole, clamping each other. The outer walls of the clamping plates 4 are arc-shaped and fit against the wall of the mounting hole. The two clamping plates 4 clamp the reinforcing bar, generating friction between them. The hydraulic cylinder 1 pushes the clamping head 2 to the left. Because of the friction, the clamping plates 4 do not move, and the tapered structure (the hole diameter gradually decreases from left to right) of the mounting hole tightens the two clamping plates 4. The tighter the clamping plates 4 clamp the reinforcing bar, the stronger the pushing force of the hydraulic cylinder 1, and the tighter the clamping plates 4 clamp.

[0017] A limiting block 7 is fixed to the outer wall of the clamping plate 4, and a limiting groove 8 is provided on the wall of the mounting hole, which slides left and right with the limiting block 7. The limiting groove 8 cooperates with the limiting block 7 to restrain the clamping plate 4 from moving within the mounting hole.

[0018] The clamping surface of the clamping plate 4 is provided with several biting teeth 3. The biting teeth 3 are used to increase the friction between the clamping plate 4 and the reinforcing bar, and improve the tightness of the clamping plate 4 in clamping the reinforcing bar.

[0019] The width of the opening is smaller than the width of the clamping plate 4 to prevent the clamping plate 4 from coming out of the opening. Therefore, one of the clamping plates 4 is used to block the opening to prevent the reinforcing bars from running out of the opening during the test.

[0020] A positioning clamp 5 is fixed on the cylinder body of the hydraulic cylinder 1. The positioning clamp 5 is made of elastic material, and the clamping groove of the positioning clamp 5 is on the same straight line as the mounting hole. The positioning clamp 5 has a positioning groove. When in use, the reinforcing bar is placed into the positioning clamp 5.

[0021] In actual use, first remove the clamping plate 4 from the mounting hole, then insert the reinforcing bar into the mounting hole from the opening, then press the tail of the hydraulic cylinder 1 against the wall, and connect the connector 6 on the hydraulic cylinder 1 to the oil supply pipe of the oil supply equipment. Finally, insert the two clamping plates 4 into the mounting hole in sequence. When inserting, insert them from the gap between the reinforcing bar and the mounting hole on the left side of the mounting hole, with one plate on the lower side and the other on the upper side. The lower clamping plate 4 seals the opening, thus completing the preparation work for the rebar anchorage test. Since it is not necessary to insert or cut the reinforcing bar from a distant end, the reinforcing bar is directly inserted into the mounting hole from the opening. The clamping plate 4 is used to seal the hole and is also used as a component to hold the reinforcing bar, making the rebar anchorage test relatively simple and convenient.

Claims

1. A test device for the anchoring performance of a planting rebar group, comprising a clamping head (2), a hydraulic cylinder (1) being provided on the right side of the clamping head (2), the clamping head (2) being mounted on the piston end of the hydraulic cylinder (1), characterized in that: The clamping head (2) has a mounting hole that is open to the left and right. The diameter of the right side of the mounting hole is smaller than that of the left side. The wall of the mounting hole has an opening that is open to the outside. Two clamping plates (4) are independently set in the mounting hole and are clamped together. The outer wall of the clamping plate (4) is arc-shaped and fits against the wall of the mounting hole.

2. The rebar anchorage performance testing device according to claim 1, characterized in that: The outer wall of the clamp (4) is fixed with a limiting block (7), and the wall of the mounting hole is provided with a limiting groove (8) that slides left and right with the limiting block (7).

3. The rebar anchorage performance testing device according to claim 1, characterized in that: The clamping surface of the clamping plate (4) is provided with a number of biting teeth (3).

4. The rebar anchorage performance testing device according to claim 1, characterized in that: The width of the opening is less than the width of the clamp (4).

5. The rebar anchorage performance testing device according to claim 4, characterized in that: One of the clamps (4) is used to seal the opening.

6. The rebar anchorage performance testing device according to claim 1, characterized in that: The hydraulic cylinder (1) has a positioning clamp (5) fixed on its cylinder body. The positioning clamp (5) is made of elastic material, and the clamping groove of the positioning clamp (5) is on the same straight line as the mounting hole.

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