CN205679468U - A kind of anchor rod drawing test hydraulic support device - Google Patents

Abstract

The utility model discloses a hydraulic support device for a bolt pullout test, which comprises an upper bearing plate, a circular level is arranged on the upper end surface of the upper bearing plate, and three hydraulic pressure gauges are arranged on the bottom of the upper bearing plate. The support device, the bottom of the hydraulic support rod of the hydraulic support device is hinged on the lower bearing plate through a ball joint structure, the upper bearing plate is an equilateral triangle, and a circular through hole is arranged at the center of the upper bearing plate. Make the anchor rod and the jack on the same axis during the installation and pulling of the equipment, so that the displacement dial indicator and the anchor rod will not slip. The device is easy to operate and can effectively improve work efficiency.

Description

A hydraulic support device for bolt pullout test

technical field

The utility model relates to a hydraulic support device for a bolt pullout test, which belongs to the field of bolt pullout tests.

Background technique

When carrying out the bolt pull-out test, the pre-designed pressure-bearing plate is usually used to install the test device, and the test device cannot be changed according to the environment of the experiment. Unevenness will cause the anchor rod to be unable to be vertical and offset. When using the dial gauge to collect data, offset will occur, resulting in inaccurate experimental data. During the experiment, when the bonding strength between the anchor body and the surrounding rock mass is high, the anchor rod will yield during the drawing process, and elastic-plastic deformation will occur, resulting in excessive displacement. After exceeding the range of the jack, due to the pressure The height of the table cannot be changed so that the test cannot be continued. Only after adding cushions and then releasing the pressure can the test be continued within the range of the jack. Insufficient strength is caused by the block being crushed during the application of force. Furthermore, in the process of installing the bolt, since the bearing plate is integral and must pass through the top of the bolt for installation, the installation is troublesome, the installation work in the early stage is troublesome, the workload in the later stage is large, and the test accuracy is not high. Therefore, it is of practical significance to design a simple and quick installation of the bolt pullout test device.

Utility model content

In order to meet the requirements of the existing test conditions, the utility model provides a hydraulic support device for the anchor pullout test, so that the anchor and the jack are on the same axis during the installation and pulling of the equipment, so that the displacement dial indicator and the anchor No slippage will occur. The device is easy to operate and can effectively improve work efficiency.

In order to solve the above technical problems, the utility model proposes the following technical solutions: a hydraulic support device for bolt pullout test, which includes an upper bearing plate, the upper end surface of the upper bearing plate is provided with a circular level, and the upper pressure bearing plate is provided with a circular level. The bottom of the pressure bearing plate is provided with three hydraulic support devices. The bottom of the hydraulic support rod of the hydraulic support device is hinged on the lower pressure bearing plate through a ball joint structure. The upper pressure bearing plate is an equilateral triangle, and the center of the upper pressure bearing plate The position is provided with a circular through hole.

The ball joint structure includes a ball head arranged at the bottom of the hydraulic support rod, and the ball head is matched with a ball groove arranged on the lower bearing plate.

The upper bearing plate adopts a split structure, which includes a left half part and a right plate part, the left half part and the right plate part are assembled to form an equilateral triangle, and the three corners of the equilateral triangle are arc-shaped, so The two halves are fixedly connected by bolts.

The top of the hydraulic support rod is fixed by welding with the lower end surface of the upper bearing plate.

The upper bearing plate is made of steel plate material.

The utility model has the following beneficial effects:

With this device, the anchor rod and the jack are on the same axis during the installation and drawing of the equipment, so that the displacement dial gauge and the anchor rod will not slip, and at the same time, the assembly structure of the upper bearing plate can make the installation of the anchor It is not necessary to pass the test device through the top of the anchor rod during the rod process. The anchor rod can be passed through the center of the upper bearing plate through the assembly structure, and then the two steel plates are connected by bolts. During the test, the strength of the anchor will cause the jack to exceed the range. After the range is exceeded, the height of the support cannot be adjusted, so it is necessary to add cushions to continue the test. The hydraulic system of this device can solve this problem. Adjust the support Seat height, continue the test after pressure relief. The device reduces labor intensity, improves adjustment efficiency and adjustment accuracy, has good adjustment effect, is convenient to move, and has a simple structure.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a structural schematic diagram of the utility model device.

Figure 2 is a top view of the structure.

Fig. 3 is a detailed view of the assembly contact surface of the pressure bearing plate on this structure.

Fig. 4 is a detailed diagram of the connection of the ball hinge structure of this structure.

Fig. 5 is a cross-sectional view of the assembly contact surface of the pressure bearing plate in this structure.

In the figure: upper pressure plate 1, circular level gauge 2, hydraulic support device 3, hydraulic support rod 4, lower pressure plate 5, circular through hole 6, ball head 7, ball groove 8, bolt 9, left half 101 , the right panel part 102 .

detailed description

Embodiments of the present utility model will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1-5, a hydraulic support device for bolt pullout test is characterized in that it includes an upper bearing plate 1, a circular level 2 is arranged on the upper bearing plate 1, and the upper bearing plate 1 is placed on On the three hydraulic support devices 3, the bottom of the hydraulic support rod 4 is connected to the lower bearing plate 5 through a ball joint structure, the upper bearing plate 1 is an equilateral triangle, and the center of the upper bearing plate 1 is a circular through hole. 6.

Preferably, the hydraulic cylinder is welded to the upper pressure bearing plate 1, the upper pressure bearing plate 1 is designed as an equilateral triangle with a circular hole in the center of the triangle, and the upper pressure bearing plate 1 adopts a detachable design.

Preferably, the upper bearing plate 1 adopts a split structure, which includes a left half part 101 and a right plate part 102, the left half part 101 and the right plate part 102 are assembled to form an equilateral triangle, and the three parts of the equilateral triangle One corner is arc-shaped, and the two halves are fixedly connected by bolts 9 .

Preferably, the ball joint structure includes a ball head 7 designed at the end of the hydraulic piston rod 4 and a ball groove 8 designed on the lower pressure bearing plate 5 , and the ball head 7 is mated with the ball groove 8 .

Preferably, the design of the ball head 7 and the ball groove 8 can make the lower bearing plate 5 move, and can be adjusted according to the difference of the contact surface.

Preferably, during the test, when the connection strength between the anchor body and the surrounding rock mass is high, and the jack is not pulled out when it reaches the measuring range, in order to avoid artificially adding pads, the height of the support can be adjusted through the hydraulic system, and the pressure release will make it The jack is restored to its initial state, and the test is continued.

Preferably, the assembly structure of the upper bearing plate can solve the problem that the device must be penetrated and installed from the end of the steel bar during the installation of the anchor rod.

The specific working principle and working process of the utility model device are:

Because the lifting of the device is controlled by the hydraulic system, it can be transported by lowering the height of the device during the transportation of the device, which is convenient and quick. For the installation of the anchor rod, first loosen the bolts on the upper bearing plate, and the upper bearing plate is composed of two It is partially assembled. After the anchor rod is put into the circular through hole of the bearing plate, the bolts are tightened, and the upper bearing plate is assembled as a whole. After the anchor rod is put into the circular through hole, the hydraulic piston rod is adjusted by the hydraulic system. Make the support level, make the center of the support and the anchor rod on the same axis, check whether it is horizontal through the level meter, after completion, put the jack on the upper pressure plate, release the pressure of the jack, and then tighten the steel bar with a clamp. Finally, put the pointer of the dial gauge on the upper end of the steel bar, and set the dial gauge to zero. The pullout test was then carried out with a bolt puller.

Through the above description, those skilled in the art can make various changes and modifications without departing from the technical idea of the utility model, all of which are within the protection scope of the utility model. Unfinished matters of the utility model belong to the common knowledge of those skilled in the art.

Claims (4)

1. A hydraulic support device for a bolt pullout test, characterized in that it includes an upper pressure bearing plate (1), and a circular level (2) is provided on the upper end surface of the upper pressure bearing plate (1). The bottom of the upper pressure bearing plate (1) is provided with three hydraulic support devices (3), and the bottom of the hydraulic support rod (4) of the hydraulic support device (3) is hinged on the lower pressure bearing plate (5) through a ball joint structure, so The upper pressure bearing plate (1) is an equilateral triangle, and a circular through hole (6) is arranged at the center of the upper pressure bearing plate (1); The ball joint structure includes a ball head (7) arranged at the bottom of the hydraulic support rod (4), and the ball head (7) cooperates with a ball groove (8) arranged on the lower pressure bearing plate (5). 2. The hydraulic support device for bolt pullout test according to claim 1, characterized in that: the upper bearing plate (1) adopts a split structure, which includes a left half (101) and a right plate part (102), the left half part (101) and the right plate part (102) are assembled to form a regular triangle, the three corners of the regular triangle are arc-shaped, and the two halves are fixedly connected by bolts (9) . 3 . The hydraulic support device for bolt pullout test according to claim 1 , characterized in that: the top of the hydraulic support rod ( 4 ) is fixed to the lower end surface of the upper bearing plate ( 1 ) by welding. 4 . 4. The hydraulic support device for bolt pullout test according to claim 1, characterized in that: the upper bearing plate (1) is made of steel plate.