CN204882242U - Experimental quick detachable ground tackle device is drawn to laboratory stock - Google Patents

Abstract

The utility model relates to an easy-to-disassemble anchor device for a laboratory anchor rod pullout test, which can effectively solve the time-consuming and labor-intensive problems caused by the prior art in the laboratory, and make it easier to remove the anchor device from the end of the anchor rod after the laboratory anchor rod pullout test. Simple and easy to operate, the technical solution is to include locks, clamps, bolts, and nuts. Two identical locks pass through the round holes on the anchor lugs on both sides, and are fixed with bolts and nuts to form a whole. The locks, fixtures together with bolts and nuts form the easy-to-disassemble anchor device for the laboratory anchor pull-out test. After the test, the anchors can be separated by simply removing the bolts and nuts. The utility model has a novel and reasonable structure, greatly improves the working efficiency, can effectively solve the problem that the anchor is difficult to disassemble after the anchor pullout test is completed, and is an innovation in the anchorage device for the anchor pullout test.

Description

An easy-to-disassemble anchor device for laboratory anchor pull-out tests

technical field

The utility model relates to the field of coal mines, in particular to an easily dismantled anchor device for a laboratory bolt pullout test.

Background technique

As an active support method, bolt support has been widely used in coal mine production due to its advantages of low support cost, good support effect and fast support speed. The biggest advantage of the bolt compared with the traditional support method is that it can actively carry the load. It exerts a lifting force on the surrounding rock around the drilling through the bearing system composed of the anchor, the anchor rod, the tray and the nut, effectively hindering the surrounding rock deformation. Anchor bolts have good axial tensile and transverse shear resistance characteristics, and have a good control effect on the axial deformation and shear displacement of surrounding rock in drilling holes. Therefore, it is important to strengthen the research on the mechanical properties of anchor bolts. an essential work. The pull-out test of the anchor rod is an important means to test the mechanical properties of the anchor rod and the anchorage system. The test of the anchoring force of the bolt in the underground is limited by the working environment and facilities in the underground, and it takes a lot of manpower and financial resources to specialize in this work. It is an effective way to test the anchoring force of the anchor in the laboratory. It is a simple and simple method, and at the same time it provides a reference for the support design of the underground roadway. In the laboratory, due to the length of the anchor rod, the threaded section of the anchor rod cannot be well utilized, resulting in the use of a hollow cylinder lock. The biggest disadvantage of this structure is that after the pull-out test is over, due to the lock and fixture Tightly fixing the anchor rod makes it difficult to remove the lock from the end of the anchor rod, which takes time and effort, and easily causes damage to the anchor rod or the anchor device. Therefore, it is imperative to develop an easy-to-disassemble anchor device for the bolt pullout test that is simple and easy to operate in the laboratory.

Contents of the invention

In view of the above situation, in order to solve the defects of the prior art, the purpose of this utility model is to provide an easy-to-disassemble anchor device for the laboratory bolt pullout test. After the laboratory bolt pull-out test, it is easy to remove the anchor from the end of the bolt.

The technical solution solved by the utility model is to combine two identical locks together and fix them with bolts and nuts, including locks, clamps, bolts, and nuts, and to distribute three identical clamps evenly on the circle in the center of the lock. Around the hole, jigs, locks, bolts and nuts form an easy-to-disassemble anchor for the pull-out test of the anchor rod. The anchor rod is inserted into the anchor and is tightly clamped by the jig and lock.

The utility model has the advantages of novel and reasonable structure, low cost and good effect, and greatly improves the work efficiency. By adopting the combined anchor device, after the experiment is over, only the bolts and nuts need to be removed from the anchor, and the lock and fixture can be separated. , It is convenient to take out the jig and the anchor rod, saves time and effort, and is simple and easy to operate. It is an innovation in the anchor device for the anchor pullout test.

Description of drawings

Fig. 1 is the front view of the lockset of the present utility model.

Figure 2 is a front view of the utility model anchor.

Fig. 3 is a perspective view of the anchorage of the present invention.

Fig. 4 is a front view of the clamp of the present invention.

Fig. 5 is a perspective view of the utility model when in use.

Detailed ways

The specific embodiments of the present utility model will be described in further detail below in conjunction with the accompanying drawings.

Combined with Figures 1-5, the utility model includes locks, clamps, bolts, and nuts. The anchor device is that two identical locks 1 pass through the round holes 6 on the anchor lugs 2 on both sides, and use bolts 4 and nuts. 5 to be fixed and combined into a whole. The combined locks and fixtures together with bolts and nuts form an easy-to-disassemble anchor device for laboratory anchor pull-out tests. The anchor is inserted into the lock hole 7 and is tightly fixed by the fixture 3 .

In order to ensure the use effect, the lock 1 is hollow cylindrical, and its lower end is spherical, which matches the spherical groove of the backing plate to ensure balanced force. The outer diameter of the upper end of the lock is 80mm, the inner diameter of the upper end is 32mm, and the height is 96mm.

There are two anchor lugs 2 on both sides of the lockset 1. The anchor lugs are 10mm thick and 21mm wide. Each anchor lug 2 has two circular holes 6 with a diameter of 10mm and a center distance of 30mm.

The clamp 3 is in the shape of a tapered ring, the upper end is 5 mm thick, and the lower end is 1 mm thick. The angle between the two sides of the clamp 3 is 118 degrees instead of 120 degrees, so that a certain angle margin is left for the clamp to fix the anchor rod , There are threads on the inner surface of the clamp, which can effectively increase the frictional resistance when clamping the anchor rod.

The bolt 4 has a hexagonal column section with a thickness of 8mm, a cylindrical section with a length of 35mm, a diameter of 10mm, and a threaded section at the end with a length of 15mm.

The nut 5 is in the shape of a hollow hexagonal column with a length of 8mm, and the diameter of the central threaded hole matches the bolt.

The working conditions of the present utility model are: when carrying out the anchor rod drawing test in the laboratory, drill the borehole on the similar simulation material block 12 done in advance, use the anchoring agent to anchor the anchor rod 8 in the borehole, wait After the anchoring agent reaches the anchoring strength, the oil cylinder 11, the dynamometer 10, and the backing plate 9 are installed together through the anchor rod 8 in sequence. Combine two identical locksets 1 together, and fix them with bolts 4 and nuts 5 through the round holes 6 on the anchor lugs 2 on both sides. The spherical body at the lower end is in contact with the spherical body groove of the backing plate 9, and then three identical clamps 3 are evenly inserted into the gap between the anchor rod 8 and the lock 1, so that the inner surface thread of the clamp 3 is in contact with the anchor rod 8 Contact, after the assembly work is completed, the oil cylinder can be started to perform the bolt pullout test, and at the same time observe the data on the dynamometer and make a record. After the test is over, use a wrench to remove the bolt 4 and nut 5 on the anchorage, the anchorage can be separated smoothly, and then remove the backing plate 9, dynamometer 10, and oil cylinder 11 in sequence.

The working principle of the utility model is: when carrying out the anchor pullout test, because the fixture is in the shape of a cone, and the upper end is thicker and the lower end is thin, the fixture is placed in the gap between the anchor and the lock. With the ejection of the oil cylinder, the fixture will As the anchor rod is pulled out, there will be a certain displacement into the lock hole, and then the lock and clamp will firmly fix the anchor rod, and the more it is pulled, the tighter it is. After the test is over, due to the continuous ejection of the previous oil cylinder, the clamp will have a large displacement in the lock hole, and it is difficult to take the clamp out. However, this new type of anchor pullout test is easy to disassemble the anchor device. After the test, the anchor and the anchor can be separated smoothly only by removing the bolts and nuts, which saves time and effort, and is comparable to the traditional method of mechanical treatment. Compared with, it has a significant technical advantage.

The utility model has a novel structure and is easy to operate, and can carry out the bolt pullout test well in the laboratory. After the experiment, it is convenient to separate the anchor and the anchor, avoiding the damage of the anchor and the anchor caused by mechanical treatment. , saves a lot of manpower and material resources, and is easy to operate. It is an innovation in the easy-to-disassemble anchor device for laboratory bolt pulling experiments.

Claims (6)

1. a laboratory anchor rod drawing tests quick detachable anchor set, comprise lockset, fixture, bolt, nut, it is characterized in that, by two identical locksets (1) by the circular hole (6) on the anchor ear (2) of both sides, bolt (4) and nut (5) is used to be fixed, be combined into an entirety, the lockset (1) combined, fixture (3) test quick detachable anchor set together with bolt (4), nut (5) composition laboratory anchor rod drawing, during test, anchor pole is inserted in lockset hole (7), be tightly fixed by fixture (3).

2. laboratory according to claim 1 anchor rod drawing tests quick detachable anchor set, it is characterized in that, described lockset (1) in hollow cylindrical, its lower end spherically body, lockset upper end overall diameter 80mm, upper end interior diameter 32mm, high 96mm.

3. laboratory according to claim 1 anchor rod drawing tests quick detachable anchor set, it is characterized in that, respectively there are two anchor ears (2) described lockset (1) both sides, the thick 10mm of anchor ear, wide 21mm, each anchor ear (2) respectively has two circular holes 6, Circularhole diameter 10mm, center of circular hole is apart from 30mm.

4. laboratory according to claim 1 anchor rod drawing tests quick detachable anchor set, it is characterized in that, described fixture (3), tapered ring-type, the thick 5mm in upper end, the thick 1mm in lower end, fixture medial surface has screw thread, angle between fixture (3) two sides is 118 degree, for fixture fixing anchor bar leaves certain angle surplus.

5. laboratory according to claim 1 anchor rod drawing tests quick detachable anchor set, it is characterized in that, described bolt (4), the thick 8mm of six prism sections, and cylinder segment length 35mm, diameter 10mm, end thread segment length is 15mm.

6. laboratory according to claim 1 anchor rod drawing tests quick detachable anchor set, it is characterized in that, described nut (5), and in hollow hexa-prism, length is 8mm, and screwed hole of centre diameter and bolt match.