Prestressed anchor rod tensioning assembly

Abstract

The utility model relates to the technical field of pre-stressed anchor rod tensioning equipment, and discloses a pre-stressed anchor rod tensioning assembly, a tensioning instrument is installed on the lower surface of a frame body, a tensioning extension rod is arranged at the upper end of the tensioning instrument and in the frame body, the upper end of the tensioning extension rod is connected with a positioning cylinder, and the positioning cylinder is connected with the tensioning instrument. A groove is formed in the inner side of the positioning cylinder, a positioning plate is arranged at the position, close to the pre-stressed anchor rod, in the groove, and a limiting rod is arranged on the outer side of the positioning plate; a mounting frame is mounted on the outer portion of the tensioning instrument through screws, an adjusting rod is mounted in the middle of the lower surface of the mounting frame, and a fixing rod is arranged on the outer portion of the adjusting rod. Through work of the electric telescopic rod, the positioning plate can make contact with the exterior of the pre-stressed anchor rod, meanwhile, the limiting rod on the outer side of the positioning plate can be embedded into the limiting hole, and therefore the pre-stressed anchor rod can be positioned and connected, and subsequent tensioning work on the pre-stressed anchor rod is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of prestressed anchor rod tensioning equipment, in particular to a prestressed anchor rod tensioning component. Background Art

[0002] Prestressed anchor rods are the most basic component of tunnel support in contemporary coal mines. They reinforce the surrounding rock of the tunnel so that the surrounding rock can support itself. After the prestressed anchor rods are inserted into the holes, tensioning equipment is required to apply a certain tension to the prestressed anchor rods. By tensioning the prestressed anchor rods, the bearing capacity and reliability of the anchor rods can be improved, and the crack resistance of the structure can be improved.

[0003] A Chinese patent discloses a prestressed anchor tensioning device (authorization announcement number CN213625573U). The patented technology is provided with a cylinder, a clamping plate, a clamping groove, a pull rod, and a telescopic spring. Since the clamping plate and the cylinder are elastically connected by the telescopic spring, the cylinder, the prestressed anchor, and the tensioning extension rod can be clamped by the clamping plate and the clamping groove under the action of the telescopic spring, so that the exposed section of the prestressed anchor can be extended. Compared with welding extension, the above-mentioned structure has high extension construction efficiency, low labor intensity, accurate connection, and no misalignment.

[0004] However, there are still some shortcomings in this patent. Although this patent can connect the prestressed anchor rod with the tension extension rod, it can be seen from the drawings of this patent that this patent uses a spring to connect the prestressed anchor rod. In this method, the spring is first set inside the frame, which is not convenient for fixing the prestressed anchor rod. At the same time, it needs to be pulled every time it is installed to make the spring deform, which will affect its positioning efficiency. Therefore, those skilled in the art provide a prestressed anchor rod tensioning assembly to solve the problems raised in the above background technology. Utility Model Content

[0005] The purpose of the utility model is to provide a prestressed anchor rod tensioning assembly to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A prestressed anchor tensioning assembly comprises a frame and a prestressed anchor penetrating the upper surface of the frame, a tensioning instrument is installed on the lower surface of the frame, a tensioning extension rod is arranged on the upper end of the tensioning instrument inside the frame, a positioning cylinder is connected to the upper end of the tensioning extension rod, a groove is provided on the inner side of the positioning cylinder, a positioning plate is arranged inside the groove near the position of the prestressed anchor, and a limiting rod is arranged on the outer side of the positioning plate; a mounting frame is installed on the outer side of the tensioning instrument by screws, an adjusting rod is installed at the middle position of the lower surface of the mounting frame, a fixing rod is arranged on the outer side of the adjusting rod, and a handle is arranged on the outer side of the fixing rod.

[0008] As a further solution of the utility model: the outside of the adjusting rod is provided with an external thread, the inside of the fixing rod is provided with an internal thread which is screwed together with the external thread, and the adjusting rod and the fixing rod have the same height.

[0009] As a further solution of the utility model: a positioning hole is opened in the middle position of the upper surface of the frame, and the upper end of the prestressed anchor rod passes through the interior of the positioning hole.

[0010] As a further solution of the utility model: a limiting hole is further provided on the outer side of the prestressed anchor rod, and one end of the limiting rod is embedded in the limiting hole.

[0011] As a further solution of the utility model: a connecting sleeve is further installed on one side of the positioning plate, an electric telescopic rod is arranged inside the groove, and the telescopic end of the electric telescopic rod is embedded in the connecting sleeve and connected by screws.

[0012] As a further solution of the utility model: the outer side of the positioning plate contacts the outer side of the prestressed anchor rod, and the outer side of the positioning plate is provided with anti-slip stripes.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. A prestressed anchor rod tensioning assembly, through the operation of an electric telescopic rod inside a groove, the positioning plate will move outward inside the groove and contact the outside of the prestressed anchor rod, and at the same time, the limiting rod on the outside of the positioning plate will be embedded in the inside of the limiting hole, so that the prestressed anchor rod can be positioned and connected, so as to facilitate the subsequent tensioning of the prestressed anchor rod. The arrangement has a simple structure and is easy to operate, and can realize quick connection between the prestressed anchor rod and the tensioning extension rod.

[0015] 2. A prestressed anchor rod tensioning assembly, which can adjust the height of the frame by rotating the fixed rod outside the adjusting rod, that is, the external thread on the outside of the adjusting rod rotates with the internal thread on the inside of the fixed rod, so as to meet the use of caverns of different heights, so that the prestressed anchor rod can enter the interior of the frame from the positioning hole, which is convenient for subsequent tensioning work. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a prestressed anchor tensioning assembly;

[0017] Figure 2 It is a structural schematic diagram of an adjusting rod in a prestressed anchor rod tensioning assembly;

[0018] Figure 3 It is a schematic diagram of the internal structure of a frame in a prestressed anchor rod tensioning assembly;

[0019] Figure 4 The figure is a schematic diagram of the structure of a positioning plate in a prestressed anchor tensioning assembly.

[0020] In the figure: 1. prestressed anchor rod; 2. frame; 21. positioning hole; 3. tensioning instrument; 31. tensioning extension rod; 32. positioning tube; 4. fixing rod; 41. adjusting rod; 42. mounting frame; 43. handle; 5. positioning plate; 51. groove; 52. electric telescopic rod; 53. connecting sleeve; 54. limit rod; 55. limit hole. DETAILED DESCRIPTION

[0021] See also Figures 1 to 4 In the embodiment of the utility model, a prestressed anchor tensioning assembly includes a frame 2 and a prestressed anchor 1 penetrating the upper surface of the frame 2, a tensioning instrument 3 is installed on the lower surface of the frame 2, a tensioning extension rod 31 is arranged on the upper end of the tensioning instrument 3 inside the frame 2, a positioning cylinder 32 is connected to the upper end of the tensioning extension rod 31, a groove 51 is opened on the inner side of the positioning cylinder 32, a positioning plate 5 is arranged near the position of the prestressed anchor 1 inside the groove 51, and a limit rod 54 is arranged on the outer side of the positioning plate 5; the tensioning instrument 3 A mounting frame 42 is installed on the outside by screws, an adjusting rod 41 is installed at the middle position of the lower surface of the mounting frame 42, a fixing rod 4 is arranged on the outside of the adjusting rod 41, and a handle 43 is arranged on the outside of the fixing rod 4. This setting utilizes the height adjustment of the adjusting rod 41 and the fixing rod 4, so that the frame 2 can be used in different caverns, and the purpose of positioning the prestressed anchor rod 1 can be achieved by moving the positioning plate 5, ensuring the positioning connection between the prestressed anchor rod 1 and the tensioning extension rod 31, so as to facilitate the tensioning work.

[0022] exist Figure 2 Middle: The outside of the adjusting rod 41 is provided with an external thread, and the inside of the fixing rod 4 is provided with an internal thread that is screwed together with the external thread. The adjusting rod 41 and the fixing rod 4 have the same height. This setting utilizes the threaded connection between the adjusting rod 41 and the fixing rod 4 to facilitate the adjustment of the height of the fixing rod 4 and the adjusting rod 41, so that the frame 2 can meet the needs of different caves.

[0023] exist Figure 1 and Figure 3 Middle: A positioning hole 21 is opened in the middle position of the upper surface of the frame 2, and the upper end of the prestressed anchor rod 1 passes through the interior of the positioning hole 21. This setting utilizes the prestressed anchor rod 1 to pass through the positioning hole 21 and enter the interior of the frame 2, which can facilitate the subsequent positioning of the prestressed anchor rod 1.

[0024] exist Figure 4 Middle: A limiting hole 55 is further provided on the outer side of the prestressed anchor rod 1, and one end of a limiting rod 54 is embedded in the limiting hole 55. This arrangement utilizes the limiting rod 54 to be embedded in the limiting hole 55, thereby ensuring the stability of the prestressed anchor rod 1.

[0025] exist Figure 4 Middle: A connecting sleeve 53 is also installed on one side of the positioning plate 5, and an electric telescopic rod 52 is arranged inside the groove 51. The telescopic end of the electric telescopic rod 52 is embedded in the connecting sleeve 53 and connected by screws. This setting utilizes the operation of the electric telescopic rod 52 to make the positioning plate 5 automatically move outward to contact the outside of the prestressed anchor rod 1, thereby achieving the purpose of positioning the prestressed anchor rod 1.

[0026] exist Figure 4 Middle: The outer side of the positioning plate 5 contacts the outer side of the prestressed anchor rod 1 , and the outer side of the positioning plate 5 is provided with anti-slip stripes, which can improve the positioning effect of the prestressed anchor rod 1 by utilizing the anti-slip stripes.

[0027] The working principle of the utility model is as follows: when the prestressed anchor rod tensioning assembly of the utility model is in use, firstly, the fixing rod 4 and the adjusting rod 41 are threadedly rotated, so that the height of the fixing rod 4 and the adjusting rod 41 can be adjusted, so that the frame 2 can be used to meet the needs of caverns of different heights. When in use, the staff can hold the handle 43 to take the fixing rod 4, so that the frame 2 can be lifted up to contact the cavern, and the lower end of the prestressed anchor rod 1 can pass through the positioning hole 21 to enter the interior of the frame 2. After entering, the electric telescopic rod 52 inside the groove 51 works, which will cause the positioning plate 5 to move outward inside the groove 51 and contact the outside of the prestressed anchor rod 1. At the same time, the limiting rod 54 on the outside of the positioning plate 5 will be embedded in the limiting hole 55, so that the prestressed anchor rod 1 can be positioned and connected, so as to facilitate the subsequent tensioning of the prestressed anchor rod 1.

[0028] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A prestressed anchor rod tensioning assembly, comprising a frame (2) and a prestressed anchor rod (1) penetrating the upper surface of the frame (2), characterized in that: A tensioning instrument (3) is installed on the lower surface of the frame (2); a tensioning extension rod (31) is arranged at the upper end of the tensioning instrument (3) inside the frame (2); a positioning tube (32) is connected to the upper end of the tensioning extension rod (31); a groove (51) is provided on the inner side of the positioning tube (32); a positioning plate (5) is provided inside the groove (51) near the position of the prestressed anchor rod (1); a limiting rod (54) is provided on the outer side of the positioning plate (5); a mounting frame (42) is installed on the outer side of the tensioning instrument (3) by screws; an adjusting rod (41) is installed at the middle position of the lower surface of the mounting frame (42); a fixing rod (4) is provided on the outer side of the adjusting rod (41); and a handle (43) is provided on the outer side of the fixing rod (4).

2. A prestressed anchor rod tensioning assembly according to claim 1, characterized in that: The outside of the adjusting rod (41) is provided with an external thread, and the inside of the fixing rod (4) is provided with an internal thread that is screwed together with the external thread. The adjusting rod (41) and the fixing rod (4) have the same height.

3. A prestressed anchor rod tensioning assembly according to claim 1, characterized in that: A positioning hole (21) is provided at the middle position of the upper surface of the frame (2), and the upper end of the prestressed anchor rod (1) passes through the interior of the positioning hole (21).

4. A prestressed anchor rod tensioning assembly according to claim 1, characterized in that: A limiting hole (55) is also provided on the outer side of the prestressed anchor rod (1), and one end of the limiting rod (54) is embedded in the limiting hole (55).

5. The prestressed anchor bolt tensioning assembly according to claim 1, characterized in that: A connecting sleeve (53) is also installed on one side of the positioning plate (5), and an electric telescopic rod (52) is arranged inside the groove (51), and the telescopic end of the electric telescopic rod (52) is embedded in the interior of the connecting sleeve (53) and connected by screws.

6. The prestressed anchor rod tensioning assembly according to claim 1, characterized in that: The outer side of the positioning plate (5) contacts the outer side of the prestressed anchor rod (1), and the outer side of the positioning plate (5) is provided with anti-slip stripes.

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