Grouting sleeve for steel bar connection

Abstract

The utility model discloses a grouting sleeve for steel bar connection, and relates to the technical field of steel bar connection. The grouting device comprises a grouting fixed cylinder, and a grouting movable cylinder is arranged above the grouting fixed cylinder. During use, two annular plates can move through a rotary knob, a rectangular rod and two threads, the two annular plates move to extrude trapezoidal blocks through L-shaped blocks to enable four sliding blocks to move at the same time, the four sliding blocks move at the same time to enable four extrusion plates to move at the same time, and the distances between the extrusion plates and the axis can be gradually reduced from the four sides when the four extrusion plates move; when a rotary knob cannot rotate and a plurality of sliding blocks cannot move back and forth, the two reinforcing steel bars are located in the middle, so that the two reinforcing steel bars are centered with the axes of a grouting fixing cylinder and a grouting moving cylinder at the same time, and then a threaded rod is fixed through a fixing bolt; therefore, the extrusion plate is fixed, and the steel bar and the axis are prevented from deviating again.

Description

Technical Field

[0001] The utility model relates to the technical field of steel bar connection, in particular to a grouting sleeve for steel bar connection. Background Art

[0002] The grouting sleeve connection technology is applicable to reinforced concrete structure engineering, steel structure engineering, bridge engineering, offshore oil production platform engineering, offshore wind power tower and other fields. The grouting sleeve is a combination of a specially processed sleeve, matching grouting material and steel bar assembly. When connecting the steel bar, the fast-hardening non-shrinkage grouting material is injected, and the steel bar and the sleeve are connected by the bonding and bite action between the materials.

[0003] In the prior art, the full grouting sleeve is set in an arc shape. When in use, generally two steel bars are first placed in the full grouting sleeve, and then grouting is added through the grouting holes. When the slurry is discharged from the grouting port, the grouting is stopped. After the grouting material hardens, it is tightly combined with the steel bars to be connected and the grouting sleeve to form an anchor connection. However, the full grouting sleeve is generally long, and the on-site construction conditions are complex and changeable. During construction, it is impossible to ensure that the two steel bars and the sleeve are axially aligned, and the axial deviation of the two steel bars will lead to eccentric stress, local excessive thickness and air entrapment, which may easily affect the later bearing capacity and durability. Utility Model Content

[0004] In order to solve the above-mentioned problems, the utility model provides a grouting sleeve for steel bar connection, so as to solve the problem that the axis alignment of the two steel bars and the sleeve cannot be ensured, and the axial offset of the two steel bars will lead to eccentric stress, local excessive thickness and air entrapment, which may easily affect the later bearing capacity and durability.

[0005] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical scheme: a grouting sleeve for steel bar connection, comprising a grouting fixed tube, a grouting movable tube is arranged above the grouting fixed tube, a grouting port and a grouting discharge port are respectively fixed on the peripheral outer walls of the grouting fixed tube and the grouting movable tube, a shielding tube is installed on the top of the grouting fixed tube, a placement groove adapted to the shielding tube is opened at the bottom of the grouting movable tube, and an axial centering mechanism is commonly arranged on the grouting fixed tube and the grouting movable tube;

[0006] The axial centering mechanism includes four sliding holes opened on the outer walls of the circumference of the grouting fixed cylinder and the grouting movable cylinder, and sliders are slidably installed on the plurality of sliding holes. The other ends of the plurality of sliders extend into the grouting fixed cylinder and the grouting movable cylinder respectively and are respectively installed with extrusion plates, and the other ends of the plurality of sliders are installed with trapezoidal blocks, and a driving mechanism that enables the plurality of extrusion plates to move simultaneously is jointly provided in the grouting fixed cylinder and the grouting movable cylinder, and the driving mechanism is installed in cooperation with the trapezoidal blocks.

[0007] Preferably, the driving mechanism includes fixed blocks respectively installed on the outer walls of the grouting fixed cylinder and the grouting movable cylinder, and the sides of the two fixed blocks close to each other are rotatably installed with threaded rods, the threads of the two threaded rods are arranged in opposite directions, a knob is installed on the top of one of the threaded rods, and annular plates are threaded on the two threaded rods, and four L-shaped blocks matching the trapezoidal blocks are installed on the sides of the two annular plates, and the two threaded rods are installed in cooperation through a transmission unit.

[0008] Preferably, the transmission unit comprises a rectangular rod installed on the top end of one of the threaded rods, and a rectangular groove matching the rectangular rod is formed at the bottom end of the other threaded rod.

[0009] Preferably, guide rods are installed on the sides of the two fixing blocks that are close to each other, guide holes are opened on the tops of the two annular plates, and the two guide rods pass through the two guide holes respectively.

[0010] Preferably, a fixing threaded hole is opened on the side of one of the fixing blocks, a fixing bolt is installed in the inner thread of the fixing threaded hole, and an end of the fixing bolt is tightly pressed against one of the threaded rods.

[0011] Preferably, a fixing plate is installed on the circumferential outer wall of the grouting fixed cylinder, a screw rod is installed on the top of the fixing plate, an adjusting block is installed on the bottom end of the screw rod, a moving block is fixedly installed on the circumferential outer wall of the grouting movable cylinder, the moving block is threadedly sleeved on the screw rod, a fastening threaded hole is opened on the side of the fixing plate, a fastening bolt is threadedly installed in the fastening threaded hole, and the end of the fastening bolt is tightly pressed against the side of the screw rod.

[0012] Preferably, four partitions are installed on the inner wall of the circumferential side of the grouting fixing tube and the inner wall of the circumferential side of the shielding tube.

[0013] The beneficial effects of the utility model are as follows:

[0014] The utility model can move two annular plates through a knob, a rectangular rod and two threads. The movement of the two annular plates will squeeze the trapezoidal block through the L-shaped block to make four sliders move simultaneously. The simultaneous movement of the four sliders will make four extrusion plates move simultaneously. The movement of the four extrusion plates will gradually reduce the distance between the extrusion plates and the axis from four sides. At this time, the gradually reduced distance will squeeze the two steel bars. When the knob cannot be rotated and the multiple sliders cannot move forward and backward, the two steel bars are in the middle position, so that the two steel bars are aligned with the axis of the grouting fixed tube and the grouting movable tube at the same time, and then the threaded rod is fixed by the fixing bolt, so as to fix the extrusion plate and prevent the steel bars from deviating from the axis again.

[0015] The utility model facilitates the movement of the grouting movable tube by arranging a fixed plate, a screw rod, a moving block and a shielding tube. The movement of the grouting movable tube increases the distance between the top of the grouting movable tube and the grouting fixed tube, thereby changing the length of another steel bar in the grouting fixed tube and the grouting movable tube. Therefore, the anchoring length can be changed and adjusted according to the actual construction conditions on site, which is convenient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model from the first perspective;

[0017] Figure 2 yes Figure 1 The enlarged structural diagram at A in the middle;

[0018] Figure 3 It is a partially cutaway three-dimensional structural schematic diagram of the utility model;

[0019] Figure 4 yes Figure 3 Enlarged structural diagram at B in the middle.

[0020] Figure numerals: 1. grouting fixed cylinder; 2. grouting moving cylinder; 3. shielding cylinder; 4. sliding block; 5. extrusion plate; 6. trapezoidal block; 7. fixed block; 8. threaded rod; 9. annular plate; 10. L-shaped block; 11. rectangular rod; 12. guide rod; 13. fixing bolt; 14. fixing plate; 15. screw rod; 16. moving block; 17. partition; 18. grouting port; 19. grouting outlet. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with specific embodiments. However, people familiar with the art should understand that the detailed description given here in conjunction with the drawings is for better explanation, and the structure of the present invention necessarily exceeds these limited embodiments. For some equivalent replacement schemes or common means, they are no longer described in detail herein, but still fall within the scope of protection of the present application.

[0022] Figures 1 to 4 It is the best embodiment of the utility model, and the following Figures 1 to 4 The utility model is further described.

[0023] A grouting sleeve for steel bar connection, comprising a grouting fixed tube 1, a grouting moving tube 2 is arranged above the grouting fixed tube 1, a grouting port 18 and a grouting port 19 are respectively fixed on the peripheral outer walls of the grouting fixed tube 1 and the grouting moving tube 2, a shielding tube 3 is installed on the top of the grouting fixed tube 1, a placement groove adapted to the shielding tube 3 is opened at the bottom of the grouting moving tube 2, and an axial centering mechanism is commonly arranged on the grouting fixed tube 1 and the grouting moving tube 2;

[0024] The axial centering mechanism includes four sliding holes opened on the outer walls of the grouting fixed cylinder 1 and the grouting movable cylinder 2. Slide blocks 4 are slidably installed on the multiple sliding holes. The other ends of the multiple slide blocks 4 extend into the grouting fixed cylinder 1 and the grouting movable cylinder 2 respectively and are respectively installed with extrusion plates 5. The other ends of the multiple slide blocks 4 are installed with trapezoidal blocks 6. A driving mechanism for simultaneously moving the multiple extrusion plates 5 is commonly provided in the grouting fixed cylinder 1 and the grouting movable cylinder 2, and the driving mechanism is installed in cooperation with the trapezoidal block 6.

[0025] In this solution, the slider 4, the extrusion plate 5 and the trapezoidal block 6 are arranged to facilitate the movement of the steel bars.

[0026] Specifically, when in use, the driving mechanism will move the four extrusion plates 5 located on one side through the trapezoidal block 6 and the slider 4. The movement of the four extrusion plates 5 will gradually reduce the distance between the extrusion plates 5 and the axis from the four sides, thereby pushing the steel bars to align them with the axis of the grouting fixed tube 1 and the grouting movable tube 2, and at the same time fix them to avoid further deviation.

[0027] The driving mechanism includes fixed blocks 7 respectively installed on the outer walls of the grouting fixed cylinder 1 and the grouting movable cylinder 2. The sides of the two fixed blocks 7 close to each other are rotatably installed with threaded rods 8. The two threaded rods 8 are arranged with opposite threads. A knob is installed on the top of one of the threaded rods 8. The two threaded rods 8 are threaded with annular plates 9. Four L-shaped blocks 10 compatible with the trapezoidal blocks 6 are installed on the sides of the two annular plates 9. The two threaded rods 8 are installed in cooperation through a transmission unit.

[0028] In this solution, the threaded rod 8, the annular plate 9 and the L-shaped block 10 are arranged to facilitate the movement of the trapezoidal block 6.

[0029] Specifically, the rotation of the threaded rod 8 will cause the four L-shaped blocks 10 to move through the annular plate 9. The movement of the four L-shaped blocks 10 will squeeze the four trapezoidal blocks 6 to move simultaneously, thereby pushing the steel bars from four sides to place them in the axial position. At the same time, multiple extrusion plates 5 can be fixed by simply fixing the threaded rod 8.

[0030] The transmission unit comprises a rectangular rod 11 mounted on the top end of one of the threaded rods 8 , and a rectangular groove matched with the rectangular rod 11 is formed at the bottom end of the other threaded rod 8 .

[0031] In this solution, the two threaded rods 8 rotate simultaneously by setting the rectangular rod 11.

[0032] Specifically, when the grouting fixed cylinder 1 and the grouting movable cylinder 2 move, the two threaded rods 8 will also move away from each other, and at the same time, one end of the rectangular rod 11 will move away from the top inner wall of the rectangular groove. When the grouting movable cylinder 2 moves to the maximum distance, the rectangular rod 11 is still partially in the rectangular groove. At this time, the rotation of one of the threaded rods 8 can still drive the other threaded rod 8 to rotate through the rectangular groove and the rectangular rod 11.

[0033] Guide rods 12 are installed on the sides of the two fixing blocks 7 that are close to each other. Guide holes are opened on the tops of the two annular plates 9, and the two guide rods 12 pass through the two guide holes respectively.

[0034] In this solution, the guide rod 12 is provided to play a certain guiding role, so that the two annular plates 9 move along the horizontal direction.

[0035] A fixing threaded hole is provided on the side of one of the fixing blocks 7 , and a fixing bolt 13 is installed in the fixing threaded hole through a thread. The end of the fixing bolt 13 is tightly pressed against one of the threaded rods 8 .

[0036] In this solution, the threaded rod 8 is easily fixed by providing the fixing bolts 13 .

[0037] Specifically, when the end of the fixing bolt 13 is tightly pressed against the threaded rod 8, the threaded rod 8 cannot rotate. The inability of the threaded rod 8 to move will make the L-shaped block 10 unable to move, and then make the extrusion block 15 unable to move, thereby fixing the steel bar and preventing it from shifting again.

[0038] A fixing plate 14 is installed on the outer wall of the circumference of the grouting fixed cylinder 1, a screw rod 15 is installed on the top of the fixing plate 14, and an adjusting block is installed on the bottom end of the screw rod 15. A moving block 16 is fixedly installed on the outer wall of the circumference of the grouting movable cylinder 2, and the moving block 16 is threadedly sleeved on the screw rod 15. A fastening threaded hole is opened on the side of the fixing plate 14, and a fastening bolt is threadedly installed in the fastening threaded hole, and the end of the fastening bolt is tightly pressed against the side of the screw rod 15.

[0039] In this solution, the spacing between the grouting fixed cylinder 1 and the grouting movable cylinder 2 can be easily adjusted by arranging the fixing plate 14 , the adjusting block, the screw rod 15 , the moving block 16 and the fastening bolts.

[0040] Specifically, when in use, the movable block 16 is moved by moving the adjusting block and the screw rod 15. The movement of the movable block 16 will cause the grouting movable tube 2 to move, thereby increasing the distance between the grouting fixed tube 1 and the grouting movable tube 2. At this time, the length of the other steel bar in the grouting fixed tube 1 and the grouting movable tube 2 changes, so that the anchoring length can be adjusted according to the actual construction conditions on site.

[0041] Four partition plates 17 are installed on the inner wall of the circumference of the grouting fixing tube 1 and the inner wall of the circumference of the shielding tube 3 .

[0042] In this solution, the partition 17 is provided to play a certain limiting role.

[0043] Specifically, when placing the steel bars, the four partitions 17 on both sides can block one end of the two steel bars, thereby preventing the end interval of the two steel bars from being too small to affect the grouting effect.

[0044] In summary: when the utility model is in use, firstly, the grouting fixed cylinder 1 is put on one of the steel bars, and then the other steel bar is placed in the grouting movable cylinder 2, and then the ends of the two steel bars are respectively contacted with the multiple partitions 17, and when they are in contact, the knob is turned, and the rotation of the knob will cause one of the threaded rods 8 to rotate, and the rotation of one of the threaded rods 8 will cause the rectangular rod 11 to rotate, and the rotation of the rectangular rod 11 will cause the other threaded rod 8 to rotate, and the rotation of the two threaded rods 8 will cause the two annular plates 9 to move under the action of the guide rod 12, and the movement of the two annular plates 9 will respectively cause the four L-shaped blocks 10 on both sides to move, and when the L-shaped block 10 contacts the inclined surface of the trapezoidal block 6, the four L-shaped blocks 10 on one side continue to move to squeeze the trapezoidal block 6 to make it move, and the movement of the four trapezoidal blocks 6 will cause the four sliders 4 to move at the same time Move, the simultaneous movement of the four sliders 4 will cause the four extrusion plates 5 to move, and the movement of the four extrusion plates 5 will gradually reduce the distance between the extrusion plates 5 and the axis from the four sides. At this time, when the two steel bars are not aligned with the axis of the grouting fixed tube 1 and the grouting movable tube 2, the movement of the extrusion plate 5 will squeeze the steel bars to move them, thereby causing the steel bars to move toward the axis. When the knob cannot be rotated and the multiple sliders 4 cannot move forward and backward, the threaded rod 8 is fixed by the fixing bolts 13. At this time, the L-shaped block 10 cannot move, so that the two steel bars are aligned with the axis of the grouting fixed tube 1 and the grouting movable tube 2, and the steel bars are fixed to avoid further deviation. When the alignment is good, the grouting is carried out through the grouting port 18. When the slurry is discharged from the grouting port 19 and no bubbles appear, the grouting port 18 and the grouting port 19 are blocked to carry out the grouting operation.

[0045] When placing two steel bars in the grouting fixed tube 1 and the grouting movable tube 2 respectively, first rotate the adjusting block. The rotation of the adjusting block will cause the screw rod 15 to rotate. At this time, due to the action of the two threaded rods 8 and the rectangular rod 11, the grouting fixed tube 1 and the grouting movable tube 2 cannot rotate relative to each other, so that the screw rod 15 drives the moving block 16 to move. The movement of the moving block 16 will make the grouting movable tube 2 move away from the grouting fixed tube 1, so that the length of the other steel bar in the grouting fixed tube 1 and the grouting movable tube 2 changes. At this time, the shielding tube 3 will block the interval between the grouting fixed tube 1 and the grouting movable tube 2, so that the anchoring length can be changed and adjusted according to the actual construction conditions on site, which is convenient for use.

[0046] The above is only the preferred embodiment of the utility model, and does not limit the utility model in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the technical solution of the utility model still belongs to the protection scope of the technical solution of the utility model.

Claims

1. A grouting sleeve for connecting steel bars, comprising a grouting fixing sleeve (1), characterized in that: A grouting movable cylinder (2) is arranged above the grouting fixed cylinder (1), and the peripheral outer walls of the grouting fixed cylinder (1) and the grouting movable cylinder (2) are respectively fixedly provided with a grouting port (18) and a grouting port (19), a shielding cylinder (3) is installed on the top of the grouting fixed cylinder (1), and a placement groove matched with the shielding cylinder (3) is provided at the bottom of the grouting movable cylinder (2), and an axial centering mechanism is commonly provided on the grouting fixed cylinder (1) and the grouting movable cylinder (2); The axis centering mechanism comprises four sliding holes formed on the outer walls of the grouting fixed cylinder (1) and the grouting movable cylinder (2), a plurality of sliding holes are slidably mounted with sliding blocks (4), the other ends of the plurality of sliding blocks (4) respectively extend into the grouting fixed cylinder (1) and the grouting movable cylinder (2) and are respectively mounted with extrusion plates (5), the other ends of the plurality of sliding blocks (4) are respectively mounted with trapezoidal blocks (6), a driving mechanism for simultaneously moving the plurality of extrusion plates (5) is commonly provided in the grouting fixed cylinder (1) and on the grouting movable cylinder (2), and the driving mechanism is mounted in cooperation with the trapezoidal blocks (6).

2. A grouting sleeve for steel bar connection according to claim 1, characterized in that: The driving mechanism comprises fixed blocks (7) respectively mounted on the outer walls of the grouting fixed cylinder (1) and the grouting movable cylinder (2); threaded rods (8) are rotatably mounted on the sides of the two fixed blocks (7) close to each other; the threads of the two threaded rods (8) are arranged in opposite directions; a knob is mounted on the top of one of the threaded rods (8); annular plates (9) are threadedly mounted on the two threaded rods (8); four L-shaped blocks (10) matching the trapezoidal blocks (6) are mounted on the sides of the two annular plates (9); and the two threaded rods (8) are mounted in coordination via a transmission unit.

3. A grouting sleeve for connecting steel bars according to claim 2, characterized in that: The transmission unit comprises a rectangular rod (11) mounted on the top end of one of the threaded rods (8), and a rectangular groove matching the rectangular rod (11) is formed at the bottom end of the other threaded rod (8).

4. A grouting sleeve for connecting steel bars according to claim 2, characterized in that: Guide rods (12) are installed on the sides of the two fixing blocks (7) that are close to each other, and guide holes are opened on the tops of the two annular plates (9), and the two guide rods (12) pass through the two guide holes respectively.

5. A grouting sleeve for connecting steel bars according to claim 2, characterized in that: A fixing threaded hole is provided on the side of one of the fixing blocks (7), a fixing bolt (13) is installed in the fixing threaded hole through a thread, and an end of the fixing bolt (13) is tightly abutted against one of the threaded rods (8).

6. A grouting sleeve for connecting steel bars according to claim 1, characterized in that: A fixing plate (14) is installed on the peripheral outer wall of the grouting fixed cylinder (1), a screw rod (15) is installed on the top of the fixing plate (14), and an adjusting block is installed on the bottom end of the screw rod (15); a moving block (16) is fixedly installed on the peripheral outer wall of the grouting movable cylinder (2), and the moving block (16) is threadedly sleeved on the screw rod (15); a fastening threaded hole is opened on the side of the fixing plate (14), and a fastening bolt is threadedly installed in the fastening threaded hole, and the end of the fastening bolt is tightly pressed against the side of the screw rod (15).

7. A grouting sleeve for connecting steel bars according to claim 1, characterized in that: Four partition plates (17) are installed on the inner wall of the circumferential side of the grouting fixing tube (1) and the inner wall of the circumferential side of the shielding tube (3).

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