Anchor bolt drawing experiment device
The anchor pull-out test device, which combines threaded connectors and anchor bolts, solves the damage problem caused by welding and lengthening anchor bolts, and improves uniform force distribution and data accuracy.
Patent Information
- Application Number
- CN202423045611.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-12-09
AI Technical Summary
In existing anchor pull-out tests, welding extended anchors to connect with jacks is time-consuming and labor-intensive, and may damage the anchors, affecting the accuracy of experimental parameters.
Threaded connectors are used to connect to anchor bolts. Hollow connectors are combined with connecting rods and through-hole jacks to provide uniform force and vertical support, avoiding welding damage to anchor bolts.
This approach achieves uniform stress distribution on anchor bolts, improves the accuracy of experimental data, reduces the risk of damage from welding, and simplifies the operation process.
Smart Images
Figure CN223742133U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of anchor bolt pull-out test, and specifically relates to an anchor bolt pull-out test device. Background Technology
[0002] Chemical anchors are a new type of fastening material composed of chemical agents and a metal rod. They can be used for post-installation of embedded parts in various curtain wall and marble dry-hanging constructions, as well as for equipment installation, highway and bridge railing installation, and building reinforcement and renovation.
[0003] The anchor pull-out test is a commonly used method for on-site testing of the anchoring quality of chemical anchors. It involves applying a pull-out force to the anchor using a mandrel jack until the design requirements are met or the anchor loosens. Several key points are crucial during the anchor pull-out test, affecting the success of the test and the accuracy of the data. First, the anchor and the mandrel jack must be securely connected to ensure the stability of the anchor's stress during the test. Second, the direction of the applied pull-out force must be consistent with the actual stress direction of the anchor, avoiding any bias. Third, the loading device must provide sufficient reaction force to the jack, and its height should meet the testing requirements for anchors with different exposed lengths.
[0004] In chemical anchor pull-out tests, the anchor bolts are often too short to be loaded onto a jack. A common practice is to weld a steel bar to the anchor bolt as an extension, connect the jack to the extension, and then pull the extension upwards with the jack to allow for the pull-out test. However, welding the extension is often time-consuming and labor-intensive, requiring welding equipment and a power connection on site. Furthermore, welding can sometimes damage the anchor bolt, and if the weld is not strong enough, it can lead to inaccurate test parameters. Utility Model Content
[0005] The present invention aims to provide an anchor bolt pull-out test device to solve the problem that the existing anchor bolt pull-out test uses welding to extend the anchor bolt and connect it to the jack, which leads to the anchor bolt being damaged or the weld being weak, thus affecting the test parameters.
[0006] This invention provides an anchor bolt pull-out test device, comprising an anchor bolt and a through-hole jack. The top of the anchor bolt is threadedly connected to a connector, which is a hollow cylinder with an outer diameter matching the inner diameter of the through-hole jack. The bottom of the connector has an internal thread, and the top thread of the anchor bolt enters the connector. A threaded post is fixedly connected to the end of the connector away from the anchor bolt, and the threaded post has an external thread. A connecting rod is threadedly connected to the threaded post. The center of the through-hole jack passes through the connector and the connecting rod. The connecting rod extends out of the other end of the through-hole jack and is threadedly connected to a nut.
[0007] The working principle of this solution is as follows: When in use, connect the connector to the anchor bolt by thread until the connector contacts the wall. Then, connect the connecting rod to the threaded post of the connector by thread. After installation, insert the connecting rod into the center of the through jack, so that one end of the through jack contacts the wall and the other end extends out of the connecting rod. Then, connect the nut to the connecting rod by thread and tighten the nut until the nut contacts the through jack. Press the through jack between the wall and the nut to provide tensile support force to the through jack.
[0008] Beneficial effects: 1. The device connects the anchor bolt and the connecting rod through a hollow connector. Because the connector applies force to the anchor bolt from all sides and the force is applied around the anchor bolt, the connector can make the anchor bolt more uniformly stressed during the pull-out test and the measured data more accurate.
[0009] 2. The diameter of the connector is the same as the inner diameter of the through-hole jack. When the anchor bolt is located on the side wall perpendicular to the ground, it can provide vertical support for the installation of the through-hole jack and also ensure that the through-hole jack tested in this direction is located at the center of the anchor bolt, thus improving the accuracy of the experimental data.
[0010] Furthermore, a support pad is provided between the wall and the through jack, and the support pad is sleeved on the outside of the connector. When the through jack is working, the support pad plays a role in supporting the direction of the force applied by the through jack, so as to prevent the through jack from damaging the wall.
[0011] Furthermore, the connecting rod has an adapter at one end near the connector. One end of the adapter is in threaded contact with the connector, and the other end is threaded to the connecting rod. The adapter allows for replacement of the threaded end of the connecting rod, facilitating compatibility with a wider range of connectors and connecting rods of different specifications.
[0012] Furthermore, a washer is provided between the nut and the through-hole jack, and the washer is slidably connected to the connecting rod. The washer increases the contact area between the nut and the through-hole jack, disperses the pressure, and prevents the nut from damaging the through-hole jack. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of an anchor bolt pull-out test device according to the present invention. Detailed Implementation
[0014] The following detailed description illustrates the specific implementation method:
[0015] The reference numerals in the accompanying drawings of the instruction manual include: anchor bolt 1, connector 2, bearing pad 3, through jack 4, connecting rod 5, nut 6, washer 7, adapter 8.
[0016] The basic implementation examples are as follows: Figure 1As shown: An anchor bolt pull-out test device includes an anchor bolt 1 and a through-hole jack 4. The anchor bolt 1 is fixedly connected to the wall. The top of the anchor bolt 1 is threadedly connected to a connector 2. The connector 2 is a hollow cylinder, and the outer diameter of the connector 2 is the same as the inner diameter of the through-hole jack 4. The top of the anchor bolt 1 extends into the middle of the connector 2. The end of the connector 2 away from the anchor bolt 1 is also fixedly connected to a threaded post. The threaded post has an external thread, and the external thread is threadedly connected to an adapter 8. The end of the adapter 8 away from the connector 2 is threadedly connected to a connecting rod 5. A receiving pad 3 is sleeved around the connector 2. The center of the receiving pad 3 is the same as the diameter of the connector 2. The connecting rod 5 and the connector 2 pass through the center of the through-hole jack 4. One end of the through-hole jack 4 is connected to the receiving pad 3, and one end of the connecting rod 5 extends out of the top of the through-hole jack 4 and is slidably connected to a washer 7. The side of the washer 7 away from the through-hole jack 4 is threadedly connected to a nut 6.
[0017] The specific implementation process is as follows: When in use, connect the bottom of the connector 2 to the anchor bolt 1 by thread. Then, put the gasket 7 on the outside of the connector 2 and replace it with an adapter 8 that matches both the connector 2 and the connecting rod 5. Thread the adapter 8 to the threaded post of the connector 2. Thread the connecting rod 5 to the adapter 8. Pass the center of the through-hole jack 4 through the connecting rod 5 and the connector 2 so that one end of the through-hole jack 4 is connected to the receiving pad 3. Finally, slide the gasket 7 into the connecting rod 5 and use the nut 6 to fix the gasket 7 and the through-hole jack 4 between the receiving pad 3 and the nut 6. Then, the pull-out test operation of the anchor bolt 1 can be performed.
[0018] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. An anchor pull-out test apparatus comprising an anchor and a through- the-wall jack, characterized by: The top end of the anchor is threadedly connected with a connecting piece, the connecting piece is a hollow cylinder, the outer diameter of the connecting piece is consistent with the inner diameter of the through jack, the bottom of the connecting piece is provided with an internal thread, the top end of the anchor is threadedly connected into the connecting piece, the end of the connecting piece away from the anchor is fixedly connected with a threaded column, the threaded column is provided with an external thread, the threaded column is threadedly connected with a connecting rod, the center of the through jack penetrates through the connecting piece and the connecting rod, the connecting rod extends out of the other end of the through jack and is threadedly connected with a nut.
2. The anchor pullout test apparatus of claim 1, wherein: A receiving pad is arranged between the wall surface and the through jack, and the receiving pad is sleeved on the outside of the connecting piece.
3. The anchor pullout test apparatus of claim 2, wherein: The end of the connecting rod close to the connecting piece is provided with an adapter, one end of the adapter is in threaded contact with the connecting piece, and the other end of the adapter is threadedly connected with the connecting rod.
4. The anchor pullout test apparatus of claim 3, wherein: A gasket is arranged between the nut and the through jack, and the gasket is slidingly connected to the connecting rod.