Prestress expansion shell anchor head

Abstract

The utility model relates to the technical field of geotechnical engineering anchoring support, in particular to a prestress expansion shell anchor head which comprises a plastic outer ring, an expansion shell fixing assembly and a prestress transmission assembly, the expansion shell fixing assembly comprises a clamping inner ring, a clamping arc plate, an arc-shaped expansion shell, threads and a limiting groove plate, and the clamping inner ring is welded in the plastic outer ring; according to the prestressed expansion shell anchor head, the expansion shell piece is connected with the arc-shaped expansion shell inner wedge through the cooperation of the sliding block and the sliding groove, so that the expansion shell piece is restrained in the longitudinal direction and cannot move in the longitudinal direction after making contact with the hole wall, the anchor rod body can always apply pressure to the expansion shell piece, and the expansion shell piece deforms to form anchoring force; according to the utility model, the expansion shell piece is bound on the expansion shell inner wedge without a binding rope or a spring ring and the like, the use is convenient and rapid, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of geotechnical engineering anchoring and support, in particular to a prestressed expanding shell anchor head. Background Art

[0002] The prestressed expanding shell anchor head is a technical element for support and anchoring in geotechnical engineering and building structures. Its working principle is to apply a certain tensile force to the free section of the anchor rod through prestress technology, increasing the friction between the anchor head and the hole wall, so as to achieve the purpose of fixing and strengthening the soil body or structure.

[0003] During the use of the existing prestressed expanding shell anchor head, special equipment and processes are required, and the installation process is relatively complex, increasing labor and material resources, and the installation is complicated.

[0004] Therefore, in view of the problem that the installation process of the above-mentioned prestressed expanding shell anchor head is relatively complex, increasing labor and material resources, and the installation is complicated, a prestressed expanding shell anchor head that can be quickly installed and is convenient for maintenance can be designed. By increasing the friction between the anchor head and the hole wall, the purpose of fixing and strengthening the soil body or structure can be achieved. Content of the Utility Model

[0005] In order to overcome the problem that the installation process of the prestressed expanding shell anchor head is relatively complex, increasing labor and material resources, and the installation is complicated.

[0006] The technical solution of the utility model is: a prestressed expanding shell anchor head, which includes a plastic outer ring, and also includes an expanding shell fixing component and a prestress transmission component. The expanding shell fixing component includes a clamping inner ring, a clamping arc plate, an arc-shaped expanding shell, a thread, and a limiting groove plate. The clamping inner ring is welded inside the plastic outer ring.

[0007] Preferably, through the cooperation of the slider and the chute, the expanding shell piece and the expanding shell inner wedge are connected, so as to restrict the expanding shell piece longitudinally. After the expanding shell piece contacts the hole wall, it will not move longitudinally, so that the anchor rod body can always apply pressure to the expanding shell piece, causing the expanding shell piece to deform to form an anchoring force; the utility model does not require tying the expanding shell piece to the expanding shell inner wedge by means of tying ropes or spring rings, etc., which is convenient and fast to use and improves work efficiency.

[0008] Preferably, the clamping arc plate is clamped and installed inside the clamping inner ring; the upper end of the clamping arc plate is welded with an arc-shaped expanding shell, which pushes the anchor rod, bears the prestress, and transmits the force to the soil or rock to drive the rectangular installation plate connected to the upper end of the anchor rod to rise and fall.

[0009] Preferably, a thread is arranged inside the arc-shaped expanding shell; the upper end of the arc-shaped expanding shell is fixedly connected with a limiting groove plate, which bears the prestress and transmits the force to the soil or rock.

[0010] Preferably, the prestress transmission component includes an anchor rod, a rectangular mounting plate, a limit chute plate, an extension strip, and an anchor fitting. The limit chute plate is slidably limited within the limit chute of the upper end of the arc-shaped expanding shell.

[0011] Preferably, a rectangular mounting plate is fixedly installed at the upper end of the anchor rod. By applying prestress, the frictional force between the anchor rod and the hole wall is increased, thereby improving the anchoring force.

[0012] Preferably, the limit chute plate is welded to the upper end of the rectangular mounting plate, increasing the stability and safety of the structure, and having the characteristics of convenient installation and compact process.

[0013] Preferably, an extension strip is fixedly connected to the side end of the limit chute plate; an anchor fitting is provided at the test part of the extension strip, which can improve the construction efficiency and shorten the construction period.

[0014] Advantages of the present utility model:

[0015] 1. Through the cooperation of the slider and the chute, the expanding shell piece and the expanding shell inner wedge are connected, thereby restricting the expanding shell piece longitudinally. After the expanding shell piece contacts the hole wall, it will not move longitudinally, so that the anchor rod body can always apply pressure to the expanding shell piece, causing the expanding shell piece to deform to form an anchoring force; the present utility model does not require tying ropes or spring coils to tie the expanding shell piece to the expanding shell inner wedge, is convenient and fast to use, and improves work efficiency;

[0016] 2. Push the anchor rod, bear the prestress, and transmit the force to the soil or rock to drive the rectangular mounting plate connected to the upper end of the anchor rod to rise and fall, bear the prestress, and transmit the force to the soil or rock, so that the limit chute plate at its upper end is slidably limited within the limit chute of the upper end of the arc-shaped expanding shell;

[0017] 3. By applying prestress, the frictional force between the anchor rod and the hole wall is increased, thereby improving the anchoring force, increasing the stability and safety of the structure, having the characteristics of convenient installation and compact process, and can improve the construction efficiency and shorten the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Shows the overall structure schematic diagram of the present utility model;

[0019] Figure 2 Shows the assembled structure schematic diagram of the present utility model;

[0020] Figure 3 Shows the structure schematic diagram of the expanding shell fixing component of the present utility model;

[0021] Figure 4 Shows the structure schematic diagram of the prestress transmission component of the present utility model.

[0022] Explanation of the reference numerals: 1. Plastic outer ring; 202. Engaging inner ring; 203. Engaging arc plate; 204. Arc-shaped expansion shell; 205. Thread; 206. Limiting groove plate; 301. Anchor rod; 302. Rectangular mounting plate; 303. Limiting slide groove plate; 304. Extension strip; 305. Anchor. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] See also Figures 1-4 The utility model provides an embodiment: a prestressed expansion shell anchor head, including a plastic outer ring 1, and also including an expansion shell fixing component and a prestress transmission component. The expansion shell fixing component includes a snap-fit ​​inner ring 202, a snap-fit ​​arc plate 203, an arc-shaped expansion shell 204, a thread 205, and a limiting groove plate 206. The plastic outer ring 1 is welded with a snap-fit ​​inner ring 202. The expansion shell piece and the expansion shell inner wedge are connected by a slider and a slide groove, so that the expansion shell piece is constrained in the longitudinal direction. After the expansion shell piece contacts the hole wall, it will not move in the longitudinal direction, so that the anchor rod body can always apply pressure to the expansion shell piece, so that the expansion shell piece is deformed to form an anchoring force. The utility model does not need to tie the expansion shell piece to the expansion shell inner wedge by means of tying ropes or spring coils. It is easy and fast to use and improves work efficiency.

[0025] See also Figures 2-3 In this embodiment, a locking arc plate 203 is installed inside the locking inner ring 202; an arc expansion shell 204 is welded on the upper end of the locking arc plate 203, and a thread 205 is arranged inside the arc expansion shell 204; the upper end of the arc expansion shell 204 is fixedly connected to a limiting slot plate 206, which pushes the anchor rod 301, bears prestress, and transmits force to the soil or rock to drive the rectangular mounting plate 302 connected to the upper end of the anchor rod 301 to rise and fall, bear prestress, and transmit force to the soil or rock, so that the limiting slide slot plate 303 at its upper end slides within the limiting slot plate 206 at the upper end of the arc expansion shell 204.

[0026] See also Figure 4 In this embodiment, the prestressed transmission component includes an anchor rod 301, a rectangular mounting plate 302, a limiting slide plate 303, an extension strip 304, and an anchor 305. The upper end of the anchor rod 301 is fixedly mounted with a rectangular mounting plate 302, the upper end of the rectangular mounting plate 302 is welded with a limiting slide plate 303, and the side end of the limiting slide plate 303 is fixedly connected with an extension strip 304; the test part of the extension strip 304 is provided with an anchor 305, and the friction between the anchor rod 301 and the hole wall is increased by applying prestress, thereby improving the anchoring force, increasing the stability and safety of the structure, and having the characteristics of convenient installation and compact process, which can improve construction efficiency and shorten construction period.

[0027] When working, the anchor rod 301 is pushed to bear the prestress and transfer the force to the soil or rock, driving the rectangular mounting plate 302 connected to the upper end of the anchor rod 301 to move up and down, bearing the prestress and transferring the force to the soil or rock, so that the limiting chute plate 303 at its upper end slides within the limiting groove plate 206 at the upper end of the arc-shaped expanding shell 204. By applying prestress, the frictional force between the anchor rod 301 and the hole wall is increased, thereby improving the anchoring force and enhancing the stability and safety of the structure. It has the characteristics of convenient installation and compact process, can improve the construction efficiency and shorten the construction period.

[0028] Through the above steps, the expanding shell piece and the expanding shell inner wedge are connected by the cooperation of the slider and the chute, thereby restricting the expanding shell piece longitudinally. After the expanding shell piece contacts the hole wall, it will not move longitudinally, so that the anchor rod body can always apply pressure to the expanding shell piece, causing the expanding shell piece to deform to form an anchoring force; the utility model does not require tying ropes or spring rings to tie the expanding shell piece to the expanding shell inner wedge, which is convenient and fast to use and improves work efficiency.

Claims

1. A prestressed expansion shell anchor head, comprising a plastic outer ring (1); characterized in that: It also includes a shell expansion fixing component and a prestress transmission component. The shell expansion fixing component includes a snap-fit ​​inner ring (202), a snap-fit ​​arc plate (203), an arc-shaped shell expansion (204), a thread (205), and a limit groove plate (206). The snap-fit ​​inner ring (202) is welded inside the plastic outer ring (1).

2. A prestressed expansion shell anchor head according to claim 1, characterized in that: A clamping arc plate (203) is clamped and installed inside the clamping inner ring (202); an arc-shaped expansion shell (204) is welded to the upper end of the clamping arc plate (203).

3. The prestressed expansion shell anchor head according to claim 1, characterized in that: A thread (205) is provided inside the arc-shaped expansion shell (204); and the upper end of the arc-shaped expansion shell (204) is fixedly connected to a limiting slot plate (206).

4. The prestressed expansion shell anchor head according to claim 1, characterized in that: The prestressed transmission component comprises an anchor rod (301), a rectangular mounting plate (302), a position-limiting slide groove plate (303), an extension strip (304), and an anchor (305).

5. The prestressed expansion shell anchor head according to claim 1, characterized in that: A rectangular mounting plate (302) is fixedly mounted on the upper end of the anchor rod (301).

6. The prestressed expansion shell anchor head according to claim 1, characterized in that: A limiting slide plate (303) is welded to the upper end of the rectangular mounting plate (302).

7. The prestressed expansion shell anchor head according to claim 1, characterized in that: The side end of the limiting slide slot plate (303) is fixedly connected with an extension strip (304); the test portion of the extension strip (304) is provided with an anchor (305).

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