Self-bottom-expanding type mechanical anchor bolt

Abstract

The utility model discloses a self-bottom-expanding type mechanical anchor bolt which comprises a protective cylinder and an expansion sleeve, the expansion sleeve is located in the protective cylinder, one side of the expansion sleeve is fixedly connected with an expansion piece, the anchor bolt is rotationally connected in the protective cylinder, one side of the anchor bolt is in threaded connection with a nut, and the other side of the anchor bolt is in threaded connection with the expansion piece. An elastic pipe is fixedly connected to one side of the protection barrel and rotationally connected with the nut, a penetrating opening used for rotation of the anchor rod is formed in the elastic pipe, the nut can stably rotate on the anchor rod, the polished rod is fixedly connected to one side of the anchor rod, and the polished rod is connected with the expansion piece and the protection barrel in a penetrating mode. According to the self-bottom-expanding type mechanical anchor bolt, stable installation can be conveniently carried out through cooperation of the protection barrel, the expansion sleeve, the expansion piece, the anchor rod, the polished rod, the expansion head, the limiting ring, the positioning rod, the semicircular clamping block and the like, and meanwhile the stability of connection between the anchor rod and the protection barrel can be conveniently improved.

Description

Technical Field

[0001] The utility model relates to the technical field of anchor bolts, in particular to a self-expanding bottom type mechanical anchor bolt. Background Art

[0002] Anchor bolts refer to the general term for all post-anchoring components. They are divided into metal anchor bolts and non-metal anchor bolts according to different raw materials. Mechanical anchor bolts are components that are anchored on the concrete substrate by the friction between the anchor bolt and the drill hole or the locking key effect. They have high bearing capacity and seismic resistance and are suitable for heavy load and vibration environments. Among them, self-expanding bottom anchor bolts are an important classification of mechanical bolts. Self-expanding bottom anchor bolts are a kind of mechanical anchor bolts that form an anchoring effect through the locking key between the expanded hole at the bottom of the anchor hole and the anchor bolt expansion piece. They are widely used in domestic nuclear power plants and are often used for safety-level process system pipeline support and safety-level equipment. Their reliability and safety can directly affect the safe operation of nuclear power plants. However, the connection strength between the anchor rod part and the casing part of the current self-expanding bottom mechanical bolts is poor, and the structural stability is poor, which easily affects the anchoring effect;

[0003] In view of the above problems, the prior art has proposed a mechanical anchor bolt with a self-expanding bottom, with patent publication number CN216278854U. Through the coordination of structures such as a limit block, a movable block, a cavity groove and a spring, when the anchor rod and the expansion sleeve stop moving, the limit block can be tightly engaged in the limit groove, thereby greatly enhancing the connection strength between the anchor rod and the expansion sleeve and ensuring the stability of the structure. Although it is convenient to connect the anchor rod and the expansion sleeve through the coordination of structures such as a limit block, a movable block, a cavity groove and a spring, the stability of the spring during connection is poor, which can easily cause the limit block and the movable block to shake, thereby affecting the stability of the connection between the anchor rod and the protective tube. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies of the prior art, the utility model provides a self-expanding bottom type mechanical anchor bolt to solve the problem of poor connection stability between the anchor rod and the protective tube proposed in the background art.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a self-expanding bottom type mechanical anchor bolt, comprising a protective tube and an expansion sleeve, wherein the expansion sleeve is located in the protective tube, and an expansion piece is fixedly connected to one side of the expansion sleeve, and further comprising an anchor rod, a polished rod, an expansion head, a limiting ring, a positioning rod and a semicircular block;

[0008] The anchor rod is rotatably connected in the protective tube, and a nut is threadedly connected to one side of the anchor rod;

[0009] The polished rod is fixedly connected to one side of the anchor rod, and the polished rod is connected through the expansion piece and the protective tube;

[0010] The expansion head is fixedly connected to one side of the polished rod;

[0011] The limiting ring is fixedly sleeved on the polished rod, and a limiting opening for the limiting ring to move is opened on the inner side wall of the protective tube;

[0012] The positioning rod is rotatably connected to the protective tube through a positioning assembly, and a positioning groove matching the positioning rod is provided on the limiting ring;

[0013] The semicircular clamping block is fixedly connected to the positioning rod, and the limiting ring is provided with a clamping groove matching the semicircular clamping block.

[0014] Preferably, the positioning component comprises:

[0015] A fixed block, the fixed block is fixedly connected to the inner wall of the protective tube, and the positioning rod is rotatably connected to the fixed block;

[0016] A positioning seat, the positioning seat is fixedly connected to one side of the positioning rod, and a plurality of clamping grooves are formed on the positioning seat;

[0017] A positioning screw is threadedly connected between the positioning seat and the protection tube, and a positioning screw ring is threadedly connected to the positioning screw.

[0018] Furthermore, a rotation groove for the positioning rod to rotate is formed on the fixing block, a positioning plate is fixedly connected to one side of the positioning rod, and a positioning groove for the positioning plate to rotate is formed on the fixing block.

[0019] As a further solution of the present application, two limit blocks are symmetrically connected to the limit ring, and a limit groove for the limit blocks to slide is opened on the inner wall of the protective tube.

[0020] On the basis of the above-mentioned solution, an elastic tube is fixedly connected to one side of the protection tube, the elastic tube is rotatably connected to the nut, and a through opening for the anchor rod to rotate is opened on the elastic tube.

[0021] It should also be noted that an anti-wear pad is fixedly connected to the semicircular clamping block, and two chamfers are symmetrically provided at the positioning groove on the limiting ring.

[0022] (III) Beneficial effects

[0023] Compared with the prior art, the utility model provides a self-expanding bottom type mechanical anchor bolt, which has the following beneficial effects:

[0024] 1. In the utility model, the cooperation between the protection tube and the expansion sleeve facilitates the installation of the expansion piece, and the cooperation between the anchor rod and the polished rod enables the expansion head to be stably installed;

[0025] 2. In the utility model, the anchor rod is moved in the protective tube by rotating the nut, so that the light rod drives the limit ring and the expansion head to move. The cooperation between the limit ring and the limit opening can increase the stability of the movement of the light rod in the protective tube, so as to stably move the expansion head.

[0026] 3. In the utility model, the expansion piece can be expanded by moving the expansion head, so as to increase the stability of the installation of the expansion piece and the protective tube in the drilled hole;

[0027] 4. In the utility model, the positioning groove facilitates the movement of the limit ring under the positioning rod, and the semicircular clamping block is rotated by the positioning rod, so that the semicircular clamping block is rotated into the clamping groove, so as to fix the position of the limit ring in the protective tube, thereby facilitating the fixing of the position of the anchor rod in the protective tube;

[0028] 5. Therefore, compared with the problem of poor connection stability between the anchor rod and the protective tube in the prior art, the self-expanding bottom type mechanical anchor bolt is easy to be stably installed through the cooperation of the protective tube, expansion sleeve, expansion piece, anchor rod, bare rod, expansion head, limit ring, positioning rod and semicircular block, and at the same time it is easy to increase the stability of the connection between the anchor rod and the protective tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the overall structure of this application;

[0030] Figure 2 For this application Figure 1 A schematic diagram of the local enlarged structure at point A in the middle;

[0031] Figure 3 A schematic diagram of the structure of the cross-section of this application;

[0032] Figure 4 This is a schematic diagram of the exploded cross-sectional structure of the limit ring, positioning rod and fixing block of the present application.

[0033] In the figure: 1. protective tube; 2. expansion sleeve; 3. expansion piece; 4. anchor rod; 5. nut; 6. bare rod; 7. expansion head; 8. limit ring; 9. positioning rod; 10. semicircular block; 11. fixing block; 12. positioning seat; 13. positioning screw; 14. positioning screw ring; 15. positioning plate; 16. limit block; 17. elastic tube; 18. anti-wear pad. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] See also Figures 1 to 4 A self-expanding bottom type mechanical anchor bolt comprises a protective tube 1 and an expansion sleeve 2, the expansion sleeve 2 is located in the protective tube 1, and one side of the expansion sleeve 2 is fixedly connected with an expansion piece 3, and also comprises an anchor rod 4, a light rod 6, an expansion head 7, a limit ring 8, a positioning rod 9 and a semicircular block 10, the anchor rod 4 is rotatably connected in the protective tube 1, and one side of the anchor rod 4 is threadedly connected with a nut 5, one side of the protective tube 1 is fixedly connected with an elastic tube 17, the elastic tube 17 is rotatably connected to the nut 5, and a through hole for the anchor rod 4 to rotate is opened on the elastic tube 17, so that the nut 5 can stably rotate on the anchor rod 4, the light rod 6 is fixedly connected to one side of the anchor rod 4, and the light rod 6 is connected with the expansion piece 3 and the protective tube 1 through, the expansion head 7 is fixedly connected to one side of the light rod 6, the limit ring 8 is fixedly sleeved on the light rod 6, and the inner part of the protective tube 1 A limiting opening for the limiting ring 8 to move is provided on the side wall, and two limiting blocks 16 are symmetrically connected to the limiting ring 8. A limiting groove for the limiting block 16 to slide is provided on the inner wall of the protective tube 1, which can increase the stability of the limiting ring 8 sliding in the limiting opening. The positioning rod 9 is rotatably connected to the protective tube 1 through a positioning component, and a positioning groove matching the positioning rod 9 is provided on the limiting ring 8. The semicircular clamping block 10 is fixedly connected to the positioning rod 9, and a clamping groove matching the semicircular clamping block 10 is provided on the limiting ring 8. An anti-wear pad 18 is fixedly connected to the semicircular clamping block 10, and two chamfers are symmetrically provided at the positioning groove on the limiting ring 8. The anti-wear pad 18 can reduce the wear between the semicircular clamping block 10 and the limiting ring 8 when rotating. At the same time, the two chamfers make it easy for the semicircular clamping block 10 to enter the clamping groove.

[0036] See also Figures 1 to 4 The positioning assembly includes a fixing block 11, a positioning seat 12 and a positioning screw 13. The fixing block 11 is fixedly connected to the inner wall of the protective tube 1. The positioning rod 9 is rotatably connected to the fixing block 11. The positioning seat 12 is fixedly connected to one side of the positioning rod 9, and a plurality of clamping grooves are provided on the positioning seat 12. The positioning screw 13 is threadedly connected between the positioning seat 12 and the protective tube 1, and a positioning screw ring 14 is threadedly connected to the positioning screw 13.

[0037] By rotating the positioning rod 9 through the positioning seat 12, the positioning rod 9 can rotate the semicircular block 10 into the groove, so as to fix the position of the limit ring 8 at the positioning rod 9, thereby fixing the position of the limit ring 8 in the protective tube 1, and then the positioning seat 12 and the protective tube 1 can be connected through the cooperation of the positioning screw 13 and the positioning screw ring 14, so as to fix the position of the positioning rod 9 and the semicircular block 10, thereby facilitating the increase of the stability of the installation of the limit ring 8, the light rod 6 and the anchor rod 4 in the protective tube 1.

[0038] See also Figures 1 to 4 The fixed block 11 is provided with a rotation groove for the positioning rod 9 to rotate, a positioning plate 15 is fixedly connected to one side of the positioning rod 9, and the fixed block 11 is provided with a positioning groove for the positioning plate 15 to rotate;

[0039] Through the cooperation between the positioning plate 15 and the positioning groove, the positioning rod 9 can stably rotate in the rotation groove, so as to increase the stability of the rotation of the positioning rod 9 on the fixing block 11 .

[0040] To sum up, after the protective tube 1 of the self-expanding bottom type mechanical anchor is placed in the drill hole, the nut 5 is rotated on the anchor rod 4, so that the anchor rod 4 drives the limiting ring 8 and the expansion head 7 to move through the light rod 6, so that the expansion head 7 can lift and expand the expansion piece 3. At the same time, the positioning rod 9 is rotated through the positioning seat 12, so that the positioning rod 9 drives the semicircular block 10 to rotate, so that the semicircular block 10 can be rotated into the slot, and then the positioning seat 12 and the protective tube 1 are connected by the positioning screw 13 and the positioning screw ring 14, so as to fix the positions of the anchor rod 4, the light rod 6, the limiting ring 8, the expansion head 7 and the expansion piece 3.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-expanding bottom type mechanical anchor bolt, comprising a protective tube (1) and an expansion sleeve (2), wherein the expansion sleeve (2) is located inside the protective tube (1), and an expansion piece (3) is fixedly connected to one side of the expansion sleeve (2), characterized in that: Also includes: An anchor rod (4), the anchor rod (4) being rotatably connected in the protection tube (1), and a nut (5) being threadedly connected on one side of the anchor rod (4); A polished rod (6), the polished rod (6) being fixedly connected to one side of the anchor rod (4), and the polished rod (6) being connected through the expansion piece (3) and the protective tube (1); An expansion head (7), the expansion head (7) being fixedly connected to one side of the polished rod (6); A limiting ring (8), wherein the limiting ring (8) is fixedly sleeved on the polished rod (6), and a limiting opening for the limiting ring (8) to move is provided on the inner side wall of the protective tube (1); A positioning rod (9), the positioning rod (9) is rotatably connected to the protective tube (1) through a positioning assembly, and a positioning groove matching the positioning rod (9) is provided on the limiting ring (8); A semicircular clamping block (10) is fixedly connected to the positioning rod (9), and a clamping groove matching the semicircular clamping block (10) is provided on the limiting ring (8).

2. A self-expanding bottom type mechanical anchor bolt according to claim 1, characterized in that: The positioning component comprises: A fixed block (11), the fixed block (11) is fixedly connected to the inner wall of the protective tube (1), and the positioning rod (9) is rotatably connected to the fixed block (11); A positioning seat (12), wherein the positioning seat (12) is fixedly connected to one side of the positioning rod (9), and a plurality of clamping grooves are formed on the positioning seat (12); A positioning screw (13), wherein the positioning screw (13) is threadedly connected between the positioning seat (12) and the protection tube (1), and a positioning screw ring (14) is threadedly connected to the positioning screw (13).

3. A self-expanding bottom type mechanical anchor bolt according to claim 2, characterized in that: The fixing block (11) is provided with a rotation groove for the positioning rod (9) to rotate, one side of the positioning rod (9) is fixedly connected with a positioning plate (15), and the fixing block (11) is provided with a positioning groove for the positioning plate (15) to rotate.

4. A self-expanding bottom type mechanical anchor bolt according to claim 3, characterized in that: Two limiting blocks (16) are symmetrically connected to the limiting ring (8), and a limiting groove for the limiting blocks (16) to slide is provided on the inner side wall of the protection tube (1).

5. A self-expanding bottom type mechanical anchor bolt according to claim 4, characterized in that: An elastic tube (17) is fixedly connected to one side of the protective tube (1), the elastic tube (17) is rotatably connected to the nut (5), and a through opening for the anchor rod (4) to rotate is provided on the elastic tube (17).

6. A self-expanding bottom type mechanical anchor bolt according to claim 5, characterized in that: An anti-wear pad (18) is fixedly connected to the semicircular clamping block (10), and two chamfers are symmetrically provided at the positioning groove on the limiting ring (8).

Images