Rebar connection structure, prefabricated component and assembly

Abstract

The utility model discloses a reinforcing steel bar connecting structure, prefabricated component and assembly, relate to building reinforcing steel bar connecting technical field, its technical scheme includes sleeve and the reinforcing steel bar to be connected, and the sleeve includes the cylinder and the sealing gasket at the cylinder port, and the sealing gasket makes the closed chamber in the cylinder, and the closed chamber in the cylinder is provided with the cementing material, and the connecting reinforcing steel bar punctures the sealing gasket and enters into the cylinder, and the cementing material will be wrapped up with connecting reinforcing steel bar, and will be connected with the cylinder and reinforcing steel bar. The utility model has the advantages that the sleeve is injected with the cementing material in advance, and when installing, just inserts the reinforcing steel bar, and the installation is convenient, and the connection is reliable, and the structure of sealing gasket makes the cementing material leak little, and the setting of quality bolt hole makes the connection of sleeve realize the intuitive inspection, and compared with the grouting sleeve of prior art, the connection quality is more guaranteed, and the sleeve can be applied to cast-in-place environment and prefabricated environment, and the port setting of different forms at the other end makes the sleeve applicable to various occasions, and the installation is convenient, and the connection is efficient.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated buildings, and in particular to a steel reinforcement connection structure, prefabricated components and assemblies. Background Technology

[0002] Currently, the connection methods for precast components in prefabricated concrete structures, especially the vertical reinforcement connection methods for vertical components (precast wall panels / columns), mainly include: 1) welding connection of embedded parts, 2) bolt connection of embedded parts, and 3) grouting connection of reinforcement sleeves.

[0003] Embedded component welding connection is a method of connecting steel plates that are pre-placed at the connection points of components. After the prefabricated components are installed in place, the adjacent embedded steel plates between the components are welded together to form a whole.

[0004] Advantages: Simple installation and operation; Disadvantages: Due to the welding process, the properties of the connecting steel plates are altered to be brittle, resulting in poor toughness / easy cracking / low connection strength, poor overall structural integrity / air tightness / seismic resistance, and poor corrosion resistance / durability; It is now an obsolete technology with a small market application range.

[0005] The bolt connection method for embedded parts involves pre-drilling bolt holes in the embedded steel plate and pre-drilling bolts at the installation location. During installation, the pre-drilled bolts are inserted into the bolt holes in the embedded steel plate of the pre-installed component and tightened with nuts. Advantages include higher connection strength than welding. Disadvantages include high cost, poor structural integrity / air tightness / seismic resistance, and poor corrosion resistance / durability; its market application is limited.

[0006] Grouting connection of reinforcing bar sleeves: The grouting sleeve consists of a sleeve open at both ends and a grout inlet and outlet on the side wall of the sleeve. One section of the sleeve is pre-embedded in the precast component, and the grout inlet and outlet are reserved on the outside of the upper component. The pre-embedded reinforcing bars of the precast component are inserted into the sleeve. During installation, the protruding reinforcing bars of the precast component to be assembled are inserted into the sleeve; after the components are installed and positioned, the joint between the two precast components is filled, and then grout is injected through the grout inlet to connect the reinforcing bars and the sleeve, thus achieving the connection function.

[0007] Advantages: After the reinforcing bar is inserted into the sleeve, grouting creates a sealed environment for the reinforcing bar, solving the corrosion / durability problem. The connection strength is superior to the welding and bolting methods mentioned above.

[0008] Disadvantages: In practical applications, the rebar sleeve grouting connection technology has the following problems that need improvement: 1. Construction is difficult due to factors such as rebar deformation, displacement, and small installation gaps; 2. Grout leakage is prone to occur and cannot be inspected; 3. The operation process is complex, requiring specialized equipment, tools, materials, and personnel; 4. High cost and difficult quality control; 5. Many factors affect the quality of the grout (materials, water-cement ratio, mixing, grouting, leakage, personnel operation, application time, etc.), making quality control difficult; 6. Since the rebar sleeve grouting connection technology uses grout to bond the rebar to the sleeve, utilizing the principle and action of friction, the grout, as the connection medium, plays a decisive role in the connection quality. It must be fully grouted, without leakage or shrinkage. However, in practical applications, especially for vertical component connections (prone to leakage and impossible to inspect), it is difficult to guarantee connection quality, resulting in poor quality control. The quality of the connection directly affects the connection strength of the rebar, leading to ineffective connections (rebar core removal), causing building safety hazards. Utility Model Content

[0009] In view of the shortcomings of the existing technology, the first objective of this utility model is to provide a steel bar connection structure, prefabricated components and assembly, which has the advantages of simple operation and reliable connection.

[0010] The above-mentioned objective of this utility model is achieved through the following technical solution: a steel bar connection structure, including a sleeve and steel bars to be connected, the sleeve including a cylinder and a sealing gasket located at the port of the cylinder; the sealing gasket forms a closed cavity inside the cylinder, and a cementing material is placed inside the closed cavity of the cylinder; the connecting steel bar pierces the sealing gasket and enters the cylinder, the cementing material wraps the connecting steel bar and connects the cylinder and the steel bar.

[0011] With the above technical solution, the sleeve is pre-injected with cementitious material. During installation, the steel bar can be inserted simply, making installation convenient and the connection reliable.

[0012] The present invention is further configured such that: the sealing gasket is a circular gasket, the outer circumference of the sealing gasket is a complete ring, and the surface of the inner circumference is provided with multiple recessed indentations along the radial direction, so that when the connecting steel bar is inserted, the gasket is destroyed at the indentation.

[0013] The present invention is further configured such that: the sleeve also includes a clamp for fixing the sealing gasket; a step is provided on the inner wall of the cylinder near the port, and after the sealing gasket is inserted from the port, it fits against the step; the clamp holds the sealing gasket in place at the step.

[0014] This utility model is further configured such that: the sleeve also includes an end cap for fixing the sealing gasket; the sealing gasket fits into the port; the end cap is threaded into the sleeve, and the end cap secures the sealing gasket at the port of the sleeve; the end cap has an opening for the reinforcing bar to pass through.

[0015] The present invention is further configured such that: a number of capsules are arranged inside the cylinder, the capsules are divided into several groups, each group of capsules contains a gelling material, a steel bar is inserted into the sleeve, punctures the capsules inside the cylinder, the gelling material solidifies after contact with air, wraps the steel bar, and connects the steel bar to the cylinder.

[0016] The present invention is further provided with an enlarged head at the end of the connecting steel bar.

[0017] The present invention is further configured such that: the cylinder body is provided with snap-fit ​​blocks evenly distributed around the cylinder axis, the snap-fit ​​blocks can be opened in the direction away from the axis to allow the reinforcing bar enlarged head to be inserted, after the reinforcing bar is inserted, the snap-fit ​​blocks can move closer to each other, the inner circle diameter formed is smaller than the diameter of the enlarged head, and the enlarged head is snapped into the cylinder body.

[0018] The present invention is further configured such that: the outer wall of the sleeve is recessed inward to form an annular stirrup groove, or the outer wall of the sleeve is provided with stirrup through holes, and the stirrups are wrapped around the annular stirrup groove or pass through the stirrup through holes to connect multiple sleeves into a whole.

[0019] The present invention is further configured such that: one end of the sleeve is a flat opening, the reinforcing bar is provided with an enlarged head, the enlarged head is a flat head, the flat head is inserted into the cylinder through the flat opening and rotated to engage with the cylinder; the other end of the sleeve is provided with a sealing gasket, the cylinder is provided with a partition plate, and the space between the partition plate and the sealing gasket is a closed cavity.

[0020] The present invention is further configured such that: a plurality of snap-fit ​​holes are opened along the circumference of the side wall at one end of the cylinder, and snap-fit ​​blocks are installed in the snap-fit ​​holes, with the two ends of the snap-fit ​​blocks located on the inner and outer sides of the cylinder respectively; an elastic element is connected to the outer end of the cylinder, and the elastic element is fixedly installed on the cylinder; an enlarged head is provided at the end of the reinforcing bar that extends into the cylinder, and the snap-fit ​​block can snap the enlarged head into the cylinder; a sealing gasket is provided at the other end of the sleeve, and a partition plate is provided inside the cylinder, with a closed cavity between the partition plate and the sealing gasket.

[0021] The present invention is further configured such that: multiple elastic slips are evenly distributed circumferentially on the inner wall of the cylinder near one end, and the elastic slips are inclinedly arranged on the inner wall of the cylinder; the small circular opening formed by the multiple annular slips is close to the center of the cylinder, and the large circular opening is far away from the center of the cylinder; an enlarged head is provided at one end that extends into the cylinder, and the elastic slip can engage the enlarged head in the cylinder; a sealing gasket is provided at the other end of the sleeve, and a partition plate is provided in the cylinder, with a closed chamber between the partition plate and the sealing gasket.

[0022] The present invention is further configured such that: one end of the cylinder is tapered, and a grouting hole is provided on the cylinder for cement slurry to enter; one end of the reinforcing bar extends into the cylinder and expands outward to form a frustum-shaped enlarged head, which is fixed by concrete poured into the sleeve; a sealing gasket is provided at the other end of the sleeve, and a partition plate is provided inside the cylinder, with a closed cavity between the partition plate and the sealing gasket.

[0023] The above-mentioned utility model objective is achieved through the following technical solution: a precast component, in which the above-mentioned sleeve is pre-embedded; the end of the sleeve with a sealing gasket is flush with one end face of the precast component; a steel bar is connected to the other end of the sleeve and pre-embedded in the component.

[0024] The advantages of the above technical solution are that it is easy to assemble and the connection between the components is firm after assembly.

[0025] The above-mentioned utility model objective is achieved through the following technical solution: a pre-assembled body includes at least two prefabricated components that are interlocked with each other. The prefabricated components have embedded sleeves, and the port of the sleeve with a sealing gasket is flush with one end face of the prefabricated component. The other end of the sleeve is connected to a reinforcing bar, and the end of the reinforcing bar away from the sleeve extends out of the other end face of the prefabricated component and is set as an enlarged head. The enlarged head of the reinforcing bar located on one prefabricated component is inserted into the sleeve of the adjacent prefabricated component, thereby forming an assembly.

[0026] The advantages of the above technical solution are that the components are firmly connected and have good overall integrity after assembly.

[0027] The above-mentioned utility model objective is achieved through the following technical solution: a prefabricated assembly, including multiple sets of the above-mentioned steel bar connection structures, and also including two prefabricated components, the connection ends of the two prefabricated components are pre-embedded with corresponding connecting steel bars, and the connecting steel bars extend out of the end of the prefabricated component and are inserted into the sleeve to realize the prefabricated connection.

[0028] The advantages of the above technical solution are that the components are firmly connected and have good overall integrity after assembly.

[0029] In summary, the present invention has the following beneficial effects:

[0030] 1. The sleeve is pre-filled with cementitious material. During installation, simply insert the reinforcing bar. The installation is convenient and the connection is reliable.

[0031] 2. The structure of the sealing gasket minimizes leakage of cementitious material, and the inclusion of a plug hole allows for direct inspection of the sleeve connection, ensuring higher connection quality compared to existing grouting sleeves.

[0032] 3. The sleeve can be used in both cast-in-place and precast environments. The different types of port settings on the other end make the sleeve suitable for various occasions, easy to install, and efficient in connection.

[0033] 4. The cementitious material can be filled on-site, injected in advance by installing capsules and grouting pipes, etc., which makes the application scenarios of the sleeve wider and the processing more convenient.

[0034] 5. The design of stirrup grooves and stirrup holes allows multiple sleeves to be tied together with stirrups, increasing connection strength while ensuring the thickness of the protective layer. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the connection structure between the reinforcing bar and the sleeve;

[0036] Figure 2 This is a schematic diagram of a straight cylindrical structure;

[0037] Figure 3 This is a schematic diagram of a straight cylindrical body structure with anti-slip texture;

[0038] Figure 4 This is a schematic diagram of a constricted-mouth cylindrical structure;

[0039] Figure 5 This is a schematic diagram of the cylindrical structure with a flared opening;

[0040] Figure 6 This is a schematic diagram of a straight cylindrical structure with partition plates.

[0041] Figure 7 This is a schematic diagram of a constricted cylindrical structure with partition plates.

[0042] Figure 8 This is a schematic diagram of a cylindrical structure with flow holes in the partition plate;

[0043] Figure 9 This is a schematic diagram of a cylindrical structure with one end tapering.

[0044] Figure 10 This is a schematic diagram of a constricted cylindrical structure with an internal thread at one end;

[0045] Figure 11 This is a schematic diagram of a constricted cylindrical structure with an external thread at one end;

[0046] Figure 12 This is a schematic diagram of a cylindrical structure with double-layer partition plates and perforated stirrups;

[0047] Figure 13 This is a schematic diagram of a cylindrical structure with stirrup grooves.

[0048] Figure 14This is a schematic diagram of the sealing gasket structure;

[0049] Figure 15 This is a schematic diagram of a sealing gasket structure with indentations.

[0050] Figure 16 This is a diagram showing the state of the gasket after it has been punctured;

[0051] Figure 17 This is a schematic diagram of a snap ring structure;

[0052] Figure 18 This is a schematic diagram of the inner nut structure;

[0053] Figure 19 This is a schematic diagram of the external nut structure;

[0054] Figure 20-22 This is a schematic diagram of the sleeve structure;

[0055] Figure 23 This is a schematic diagram of a straight-tube sleeve structure with a retaining spring as the locking element;

[0056] Figure 24 This is a schematic diagram of a straight-tube sleeve structure with an internal nut as the clamping element;

[0057] Figure 25 This is a schematic diagram of a constricted sleeve structure with a retaining spring as the locking element;

[0058] Figure 26 This is a schematic diagram of a straight-tube sleeve structure with an external nut as the clamping element;

[0059] Figure 27 This is a schematic diagram of a combined sleeve structure with an external nut at one end and no nut at the other end;

[0060] Figure 28 It is a schematic diagram of a sleeve structure equipped with an injection pipe and a discharge pipe;

[0061] Figure 29 This is a schematic diagram of a sleeve structure with a snap-fit ​​block.

[0062] Figure 30 This is a schematic diagram of a sleeve structure with a filling of cementitious material;

[0063] Figure 31 This is a schematic diagram of a sleeve structure containing AB capsules;

[0064] Figure 32 This is a schematic diagram of a sleeve structure containing an integral capsule;

[0065] Figures 33-35 This is a schematic diagram of a steel reinforcement structure with an enlarged hook head;

[0066] Figures 36-40These are schematic diagrams of steel reinforcement structures with different shapes of enlarged heads;

[0067] Figure 41 This is a schematic diagram of a symmetrical straight cylindrical sleeve connected to reinforcing bars at both ends.

[0068] Figure 42 This is a schematic diagram of a symmetrical constricted sleeve connected to an enlarged head steel bar at both ends.

[0069] Figure 43 This is a schematic diagram of the connection structure that highlights the function of the quality inspection port;

[0070] Figure 44 This is a schematic diagram of a connection structure where one end is threaded to a reinforcing bar;

[0071] Figure 45 This is a schematic diagram showing the connection structure between the display card connector and the push-in bolt;

[0072] Figure 46 This is a schematic diagram of a connection structure where one end is cold-pressed to a steel bar;

[0073] Figure 47 This is a schematic diagram of a connection structure where one end has an external nut and the other end does not have a locking device.

[0074] Figures 48-57 This is a schematic diagram of a connection structure with a different connection method on the other end;

[0075] Figure 58 It is a structural schematic diagram of the assembly with embedded sleeves and connecting steel reinforcement components;

[0076] Figure 59 This is a structural schematic diagram of a precast component with an embedded sleeve containing an injection pipe and a discharge pipe;

[0077] Figure 60 This is a schematic diagram of the assembly structure that highlights the pre-embedded sleeve with a partition plate.

[0078] Figure 61 This is a schematic diagram of the connection structure of an assembly with multiple sleeves;

[0079] Figure 62 This is a schematic diagram of the assembled structure under cast-in-place conditions;

[0080] Figure 63 This is a schematic diagram of an assembly structure with multiple sleeve connections;

[0081] Figures 64-66 It is a schematic diagram of an assembly structure consisting of multiple prefabricated components;

[0082] Figure 67 This is a schematic diagram of the assembly structure combining the pre-embedded sleeve and the installation of the sleeve in the post-pouring strip;

[0083] Figure 68 This is a schematic diagram of a prefabricated component structure with a sleeve embedded in it, forming a stirrup groove through a constriction and a flared opening.

[0084] Figure 69 This is a structural schematic diagram of a precast component with a sleeve pre-embedded with a stirrup groove;

[0085] Figure 70 This is a structural schematic diagram of a prefabricated component with a perforated sleeve containing stirrups.

[0086] Reference numerals: 1. Reinforcing bar; 11. Enlarged head; 12. Sleeve; 13. Cementitious material;

[0087] 2. Cylinder body; 21. Narrowing; 211. Closing; 22. Step; 23. Stirrup groove; 24. Stirrup perforation; 25. Slot; 26. Anti-slip texture; 27. Inspection hole; 28. Flared mouth; 29. ​​Groove;

[0088] 201. Grouting hole; 202. Grout outlet hole;

[0089] 3. Sealing gasket; 31. Indentation; 32. Snap ring; 33. Ring-shaped inner nut; 331. Actuating hole; 34. Outer nut; 341. End cap; 342. Opening;

[0090] 41. Separator plate; 42. Flow hole; 43. Plug; 44. Push-in bolt; 45. Grouting pipe; 46. Grout outlet pipe;

[0091] 6. Capsules;

[0092] 7. Flat mouth; 71. Hook; 72. Pin; 73. Flat head; 74. Anti-rotation groove; 75. Flexible slip; 751. Pawl; 76. Snap-fit ​​hole; 77. Snap-fit ​​block; 78. Elastic element; 79. Slurry inlet hole;

[0093] 9. Precast components; 91. Horizontal components; 92. Vertical components; 93. Post-cast strips; 94. Stirrups.

[0094] To facilitate understanding of the structural optimization and evolution of each component of the sleeve, the attached diagrams are divided into six main parts: the sleeve body, the sealing gasket assembly, the assembled sleeve, the rebar enlargement head, the connection structure between the sleeve and the rebar, and the assembly. Detailed Implementation Example 1

[0095] like Figure 1As shown, a steel bar connection structure includes a sleeve 12 and two connecting steel bars 1. The sleeve 12 includes a cylinder 2 and a sealing gasket 3 located at the port of the cylinder 2. The sealing gasket 3 forms a closed chamber inside the cylinder 2, and a cementing material 13 is disposed inside the closed chamber of the cylinder 2. The connecting steel bar 1 pierces the sealing gasket 3 and enters the cylinder 2. The cementing material 13 wraps around the connecting steel bar 1 and connects the cylinder 2 to the steel bar 1.

[0096] The cementitious material 13 in the sealed cavity can be: inorganic grouting materials such as cement-based mortar and concrete; organic cementitious materials such as epoxy resin adhesive and chemical adhesive; or metal materials such as metal smelting casting (lead, tin, iron). Depending on the type of cementitious material 13 and the installation structure of the sealing gasket 3, the processing of the sleeve 12 can be divided into on-site processing, factory processing, and factory injection processing. For materials such as cement mortar and grouting materials that solidify quickly and have a short shelf life, on-site processing is mainly used. That is, the cementitious material 13 is first filled into the sleeve 12, and then sealed, completing the installation in a short time. For materials such as resin adhesive or chemical anchoring adhesive, the sleeve 12 can be added and then strictly sealed, allowing the sleeve 12 to be used even after long-term preservation. Alternatively, the sleeve 12 can be sealed first, and then the cementitious material 13 can be injected through the opening in the sleeve 12 wall, and then the injection port can be sealed to form a connecting sleeve 12. The cementitious material 13 is preferably in the form of paste. It will flow out when the reinforcing bar 1 is inserted and squeezed. When there is no squeezing force, the paste material will not flow, thereby ensuring that the sleeve 12 is filled tightly and improving the connection effect.

[0097] The sealing gasket 3 can be a rubber gasket, an iron gasket, a brittle plastic gasket, or a flexible plastic film, as long as it can seal the cylinder 2 and be punctured by the reinforcing bar 1. It should be noted that in prefabricated buildings, especially in the sleeves 12 embedded in vertical components, the reinforcing bar 1 inserts with great force during the lowering process due to the large weight of the vertical component being hoisted. Generally, sealing gaskets 3 made of ordinary materials can be punctured.

[0098] like Figure 2 and Figure 3 As shown, the sleeve 12 can have a straight cylindrical structure; as... Figure 4 and Figure 5 As shown, the port of the cylinder 2 can be a constricted structure 21. The constricted structure 21 makes the solidified cementitious material 13 inside the cylinder 2 stuck at the port, making it less likely to be pulled out compared to a straight cylinder.

[0099] like Figure 14 As shown, the specific structure of the sealing gasket 3 can be a circular gasket; further, as... Figure 15 and Figure 16As shown, the outer circumference of the sealing gasket 3 is a complete ring, and the surface of the inner circumference is provided with multiple recessed indentations 31 along the radial direction, so that when the connecting steel bar 1 is inserted, the gasket is destroyed at the indentation 31.

[0100] like Figure 2 and Figure 3 As shown, a groove 29 is provided on the inner wall of the cylinder 2 near the port. The sealing gasket 3 can be inserted from the port and, according to its own deformation, will be inserted into the groove 29 to achieve a seal, thereby forming a sleeve 12 with a closed chamber (as shown). Figures 20-22 ).

[0101] Since it is quite difficult to assemble the sealing gasket 3 into the groove 29 by relying on its own deformation, the sleeve 12 also includes a clamp for fixing the sealing gasket 3 in order to make it easier to fix the sealing gasket 3 to the port of the sleeve 12.

[0102] like Figures 2-4 As shown, a step 22 is provided on the inner wall of the cylinder 2 so that the diameter of the port is larger than the inner diameter of the cylinder 2, as shown. Figures 23-25 As shown, after the sealing gasket 3 is inserted from the port, it fits against the step 22; the clip holds the sealing gasket 3 in place at the step 22.

[0103] like Figure 17 As shown, the retaining element is a retaining spring 32 with an inner diameter large enough for the reinforcing bar 1 to pass through, and in conjunction with it, as shown in the figure. Figure 23 and Figure 25 As shown, a groove 25 is provided on the inner wall at the end of the cylinder 2, and the retaining spring 32 is inserted into the groove 25 to fix the sealing gasket 3. Figure 42 As shown, the reinforcing bar 1 passes through the inner ring of the retaining spring 32 and is inserted into the constricted sleeve 12 21 to form the reinforcing bar 1 connection structure.

[0104] like Figure 18 As shown, the clamp is a ring-shaped inner nut 33, as... Figure 24 As shown, the inner wall of the cylinder 2 port is threaded; after the annular inner nut 33 is threaded to the cylinder 2 port, it fixes the sealing gasket 3. The reinforcing bar 1 can pass through the inner ring of the annular inner nut 33 and puncture the sealing gasket 3. A turning hole 331 for tightening is provided on the exposed end face of the inner nut 33. Figure 41 As shown, the reinforcing bar 1 passes through the inner ring of the annular inner nut 33 and is inserted into the sleeve 12 to form the reinforcing bar 1 connection structure.

[0105] like Figure 19 As shown, the clamp is an external nut 34, and one end of the external nut 34 is provided with an end cap 341. An opening 342 is provided in the middle of the end cap 341 for the reinforcing bar 1 to pass through. Figure 26 As shown, after the outer nut 34 is threadedly assembled with the cylinder 2, the end cap 341 fixes the sealing gasket 3 to the port of the cylinder 2. Figure 47As shown, the reinforcing bar 1 passes through the opening 342 of the outer nut 34 and pierces the sealing gasket 3, then inserts into the sleeve 12, thereby achieving the connection between the reinforcing bar 1 and the sleeve 12.

[0106] It should be noted that the various fixing methods of the sealing gasket 3 mentioned above can be combined in pairs and used at both ends of a sleeve 12, for example... Figure 27 and Figure 47 As shown, the sealing gasket 3 at one end of the sleeve 12 is fixed by directly inserting it into the groove, while the sealing gasket 3 at the other end is fixed by an external nut 34. Figure 11 The structure of the cylinder body 2 of this type of sleeve 12.

[0107] Combination Figure 3 and Figure 21 To increase the friction between the cementitious material 13 inside the cylinder 2 and the cylinder 2 itself, anti-slip textures 26 can be provided on the inner wall of the cylinder 2. The anti-slip textures 26 can be anti-slip grooves, or similar to... Figure 42 The diagram shows a ring-shaped distribution of serrated patterns.

[0108] Combination Figure 4 and Figure 43 A quality inspection hole 27 can also be provided on the side wall of the cylinder 2. The quality inspection hole 27 does not need to be too large; it only needs to squeeze out the cementitious material 13 when the reinforcing bar 1 is inserted into the sleeve 12. When the cementitious material 13 is filled in on-site, the quality inspection hole 27 does not need to be sealed due to the short operation time. If the cementitious material 13 is pre-filled into the sleeve 12, the quality inspection hole 27 is plugged with a stopper to prevent air from entering. Before installation, the stopper is removed, and then the reinforcing bar 1 is inserted.

[0109] like Figure 5 and Figure 43 As shown, in order to facilitate the smooth insertion of the reinforcing bar 1 into the sleeve 12, the end of the sleeve 2 extends outward to form an integrally formed flared mouth 28.

[0110] Better, such as Figure 6-12 As shown, to ensure that the two reinforcing bars 1 extend into the sleeve 12 to approximately the same length, a centering partition plate 41 is provided in the middle of the sleeve 2, and the partition plate 41 is arranged perpendicular to the axial direction of the sleeve 2. Further, as... Figure 8 As shown, a flow hole 42 is provided on the partition plate 41. The size of the flow hole 42 is smaller than the size of the end of the reinforcing bar 1 to prevent the reinforcing bar 1 from passing through, but it can facilitate the flow of the cementitious material 13 in the two chambers of the sleeve 12. Other uses of the partition plate 41 will be described in subsequent embodiments.

[0111] Furthermore, to increase the connection strength between the reinforcing bar 1 and the cementitious material 13 inside the sleeve 12, the end of the reinforcing bar 1 extending into the sleeve 12 can be designated as an enlarged head 11. The enlarged head 11 is defined as having a larger diameter than the other sections of the reinforcing bar 1, sufficient to form an interlock with the cementitious material 13 after fixation. For example, the enlarged head 11 could be as follows... Figures 33-35 As shown, the hook 71 is formed by bending the end of the reinforcing bar 1, or the bent end is formed by folding it back. It can also be as follows: Figure 36 and Figure 40 The various shapes shown.

[0112] Preferably, such as Figure 38 and Figure 39 As shown, the surface of the enlarged head 11 near the end of the sleeve 12 is set as a frustum. The frustum can decompose the tensile force on the reinforcing bar 1 into forces in two directions, axial and perpendicular to the axial direction, thereby reducing the axial tensile force and enhancing the reliability of the connection between the cementitious material 13 and the reinforcing bar 1. Example 2

[0113] The sleeve 12 structure processed in Example 1 can be as follows: Figure 30 As shown, the main process involves directly filling the sleeve 12 with gelling material 13. In this embodiment, the cylinder 2 contains several capsules 6, which are divided into several groups. Each group of capsules 6 contains gelling material 13. The reinforcing bar 1 extends into the sleeve 12, punctures the capsules 6 inside the cylinder 2, and the gelling material 13 solidifies upon contact with air, wrapping the reinforcing bar 1 and connecting the reinforcing bar 1 to the cylinder 2.

[0114] like Figure 31 As shown, chemical agent capsules 6 (A and B) can be placed directly inside the cylinder 2 beforehand. The reinforcing bar 1 extends into the sleeve 12, puncturing capsule 6. After the A and B agents react chemically, the reinforcing bar 1 solidifies. Agents A and B can be two-component epoxy resin. The volume of chemical agent capsules 6 (A and B) is sufficient to fill all the gaps inside the cylinder 2. The sealing gasket 3 at this time mainly serves to prevent the chemical agent from flowing out from both ports after the reinforcing bar 1 punctures capsule 6. In Example 1, the sealing gasket 3 plays a dual role of sealing the cementitious material 13 and preventing leakage.

[0115] like Figure 32 As shown, the capsule 6 inside the sleeve 12 can also contain a single-component gelling material 13. After the steel bar 1 is punctured, it comes into contact with air, thereby solidifying and wrapping and connecting the steel bar 1.

[0116] like Figure 31 and Figure 32As shown, each sleeve 12 is equipped with a partition plate 41, dividing the interior of the sleeve 12 into two closed chambers, thus allowing the reinforcing bars 1 at both ends to be inserted into the sleeve 12 without simultaneously. A single reinforcing bar 1 can be connected to one end of the sleeve 12 first, without affecting the structure of the other end. The reinforcing bar 1 at the other end can be inserted at any time, thus increasing the applicability of the sleeve 12 connection. With the partition plate 41, inspection holes 27 can be opened on the corresponding cylinder walls of the two chambers of the sleeve 12. When the reinforcing bar 1 is inserted into the cylinder 2, the cementitious material 13 inside the cylinder 2 overflows from the inspection hole 27, allowing observation of whether the chamber is densely filled.

[0117] Furthermore, such as Figure 39 As shown, the enlarged head 11 can be set as a pointed tip to better pierce the sealing gasket 3 and the chemical capsule 6. Example 3

[0118] Both ends of the sleeve 12 can be configured with the same sealing gasket 3 structure, for example Figure 41 and Figure 42 As shown. Alternatively, one end can be a sealing gasket 3 structure, while the other end is connected to the reinforcing bar 1 in other ways. This embodiment mainly describes the case where one port of the sleeve 12 is a threaded interface, and the reinforcing bar 1 at that end is threadedly connected to the sleeve 12; the other port of the sleeve 12 is equipped with a sealing gasket 3 (e.g. Figure 44 (As shown).

[0119] like Figure 58 As shown, this type of sleeve 12 is mainly used for embedded sleeves 12 in precast components 9, especially suitable for precast walls and precast columns. A precast component 9 has a sleeve 12 embedded inside it; the end of the sleeve 12 with a sealing gasket 3 is flush with one end face of the precast component 9; a steel bar 1 is threaded to the other end of the sleeve 12 and embedded in the precast component 9.

[0120] Furthermore, such as Figure 28 As shown, the sleeve 12 also includes a grouting hole 201 and a grout outlet hole 202 opened on the side wall of the sleeve 2, as well as a grouting pipe 45 and a grout outlet pipe 46. Combined Figure 59One end of the grouting pipe 45 is connected to the grouting hole 201, and the other end is connected to the end face of the precast component 9; one end of the grout outlet pipe 46 is connected to the grout outlet hole 202, and the other end is connected to the end face of the precast component 9. During the precast construction of the precast component 9, one end of the sleeve 12 is first threadedly connected to the reinforcing bar 1, and the grout inlet and outlet pipes are led out from the side end face of the precast component 9; then concrete is poured to form the precast component 9; then the cementitious material 13 is injected into the sleeve 12 by grouting. Simultaneously, to prevent the cementitious material 13 from solidifying, plugs 43 are installed in the grouting pipe and the grout outlet pipe. To prevent the cementitious material 13 from flowing out due to the pressure generated when the reinforcing bar 1 is inserted, the grouting pipe is threadedly connected to the plug 43.

[0121] Furthermore, in order to observe whether the cementitious material 13 inside the sleeve 12 is full, a quality inspection hole 27 is provided on the plug 43. The quality inspection hole 27 is sealed with a plug before the component is installed, and the plug is removed during the component installation.

[0122] Furthermore, such as Figure 60 As shown, to prevent the cementitious material 13 injected into the sleeve 12 from being insufficient, a partition plate 41 can be installed inside the sleeve 12. The bottom surface of the partition plate 41 is flush with the top surface of the grout outlet 202 to ensure the fullness of the cementitious material 13 in the bottom closed cavity. In addition, a grout inlet hole 79 is opened on the top wall of the sleeve 12 so that the concrete grout can flow into the cavity between the top wall of the sleeve 12 and the partition plate 41, thereby further strengthening the connection effect of the reinforcing bar 1.

[0123] like Figure 58 and 60 As shown, an assembly includes at least two interlocking prefabricated components 9, schematically represented as two prefabricated wall panels. A sleeve 12 is embedded in the top prefabricated component 9, and a connecting steel bar 1 with an enlarged head 11 is embedded on the top connecting end face of the bottom prefabricated component 9. The enlarged head 11 extends out of the connecting end face and is inserted into the sleeve 12 of the top prefabricated component 9, thereby forming the assembly. Figure 61 As shown, each prefabricated component 9 has multiple sleeves 12 embedded in it, thus forming an assembly with better connection strength. Example 4

[0124] like Figure 29 and Figure 45As shown, the bottom port of the cylinder 2 is a constriction 21, forming an inclined surface on the inner wall of the cylinder 2. Several snap-fit ​​blocks 77 are evenly distributed around the axis of the cylinder 2 near the constriction 21 inside the cylinder 2. An enlarged head 11 is provided at the end of the reinforcing bar 1. When the enlarged head 11 is inserted into the cylinder 2, the snap-fit ​​blocks 77 are pushed open and open away from the axis to allow the enlarged head 11 of the reinforcing bar 1 to be inserted. After the reinforcing bar 1 is inserted, the snap-fit ​​blocks 77 move closer to each other along the inclined surface under the action of gravity, and the inner circle diameter formed is smaller than the diameter of the enlarged head 11, thus snapping the enlarged head 11 into the cylinder 2.

[0125] Furthermore, such as Figure 45 As shown, a jacking bolt 44 can also be installed on the outer wall of the sleeve 12. A threaded hole is opened on the outer wall of the sleeve 12 at the position corresponding to the snap-fit ​​block 77. After the jacking bolt 44 is screwed into the sleeve 12, it presses against the snap-fit ​​block 77 and limits the snap-fit ​​block 77 around the reinforcing bar 1, thereby preventing the snap-fit ​​block from opening and failing to snap the enlarged head 11. Example 5

[0126] This embodiment mainly introduces other connection methods between the other end of the sleeve 12 and the reinforcing bar 1 and their main application scenarios.

[0127] like Figure 58 As shown, the application scenario for sleeve 12 is to be embedded in prefabricated component 9 (hereinafter referred to as the prefabricated case), such as... Figure 62 As shown, the application scenario of sleeve 12 is to be installed in cast-in-place concrete structure (in the figure, sleeve 12 is set in the post-cast strip 93 between two precast components 9, hereinafter referred to as cast-in-place).

[0128] Connection method 1: such as Figure 9 As shown, the top end of the sleeve 12 is a constriction 211, which is combined with... Figure 46 The reinforcing bar 1 extends into the constriction 211 and is connected to the sleeve 12 by cold pressing or welding. A sealing gasket 3 is provided at the other end of the sleeve 12. This connection method is suitable for prefabricated applications.

[0129] Connection method two: such as Figure 48 As shown, one end of the sleeve 12 is a flat opening 7, and the connecting steel bar 1 at this end is provided with a hook 71. The sleeve 12 has radially through-hole pins 72. The hook 71 extends into the sleeve 12 and hooks the pin 72 inserted from the pin 72 hole, thereby connecting the connecting steel bar 1 and the sleeve 12. A partition plate 41 is provided inside the cylinder 2, and the space between the partition plate 41 and the sealing gasket 3 is a closed chamber.

[0130] This connection method is suitable for prefabricated applications.

[0131] When used in cast-in-place environments, such as Figure 49 As shown, the reinforcing bars 1 at both ends of the sleeve 12 are both designed as hooks 71. Figure 50As shown, the number of reinforcing bars 1 at each end of the sleeve 12 can be two or more.

[0132] Connection method three: such as Figure 51 and Figure 52 As shown, one end of the sleeve 12 is a flat opening 7, and the reinforcing bar 1 is provided with an enlarged head 11, which is a flat head 73. The flat head 73 is inserted into the cylinder 2 through the flat opening 7 and, after rotation, engages with the cylinder 2. The other end of the sleeve 12 is provided with a sealing gasket 3, and a partition plate 41 is provided inside the cylinder 2, forming a closed chamber between the partition plate 41 and the sealing gasket 3. An anti-rotation groove 74 is also provided on the inner wall of the end of the sleeve 12. The anti-rotation groove 74 is perpendicular to the direction of the flat opening 7, and the flat head 73 engages with the anti-rotation groove 74 after rotation.

[0133] This connection method is suitable for cast-in-place applications, and is especially suitable for connecting vertical reinforcing bars 1.

[0134] During construction, the steel bar 1 with the flat head 73 is inserted into the flat opening 7, and then the sleeve 12 is rotated to make the flat head 73 and the flat opening 7 misaligned; another steel bar 1 pierces the sealing gasket 3 and is inserted into the sleeve 12, and the cementitious material 13 wraps the steel bar 1; finally, concrete is poured to achieve the connection.

[0135] Connection method four: such as Figure 53 As shown, multiple elastic latches 75 are evenly distributed circumferentially on the inner wall of the cylinder 2 near one end. The elastic latches 75 are inclinedly arranged on the inner wall of the cylinder 2. Small circular openings 342 formed by the multiple annular latches are close to the center of the cylinder 2, while large circular openings 342 are far from the center of the cylinder 2. An enlarged head 11 is provided at one end extending into the cylinder 2, and the elastic latches 75 can engage the enlarged head 11 inside the cylinder 2. Combined with... Figure 54 The periphery of the slip is fixed to the inner wall of the cylinder 2, and the interior of the slip has multiple circumferentially arranged pawls 751 to facilitate the insertion of the reinforcing bar 1. A partition plate 41 is provided inside the cylinder 2, and a closed chamber is formed between the partition plate 41 and the sealing gasket 3 at the other end of the sleeve 12.

[0136] This connection method is suitable for cast-in-place applications.

[0137] Connection method five: such as Figure 55As shown, multiple snap-fit ​​holes 76 are opened circumferentially on the side wall of one end of the cylinder 2. Snap-fit ​​blocks 77 are installed in the snap-fit ​​holes 76, with their two ends located on the inner and outer sides of the cylinder 2, respectively. An elastic element 78 is connected to the outer end of the cylinder 2 and is fixedly installed on the cylinder 2. An enlarged head 11 is provided at the end of the reinforcing bar 1 that extends into the cylinder 2, and the snap-fit ​​block 77 can snap the enlarged head 11 into the cylinder 2. When the reinforcing bar 1 is inserted into the sleeve 12, the snap-fit ​​block 77 opens away from the axis. After the enlarged head 11 passes through the snap-fit ​​block 77, the snap-fit ​​block 77 moves towards the axis under the force of the elastic element 78, snapping the enlarged head 11 into the sleeve 12. A partition plate 41 is provided inside the cylinder 2, and a closed chamber is formed between the partition plate 41 and the sealing gasket 3 at the other end of the sleeve 12.

[0138] This connection method is suitable for cast-in-place applications.

[0139] Connection method six:

[0140] like Figure 56 As shown, one end of the cylinder 2 is a tapered constriction 211, and an inlet hole 79 for cement grout to enter is provided on the cylinder 2; the end of the reinforcing bar 1 extending into the cylinder 2 expands outward to form a frustum-shaped enlarged head 11, which is fixed by concrete poured into the sleeve 12. A partition plate 41 is provided inside the cylinder 2, and a closed chamber is formed between the partition plate 41 and the sealing gasket 3 at the other end of the sleeve 12. (Reference) Figure 57 When the reinforcing bar 1 is pulled out of the sleeve 12 under tension, the enlarged head 11 of the frustum-shaped reinforcing bar 1 converts part of the tension into radial expansion force, thereby reducing the axial tension. At the same time, due to the jamming of concrete, the enlarged head 11 cannot be pulled out from the end of the sleeve 12, thus realizing the connection between the reinforcing bar 1 and the sleeve 12.

[0141] This connection method is applicable to both cast-in-place and precast applications. Example 6

[0142] An assembly, such as Figure 62 As shown, the assembly includes two precast components 9, with corresponding connecting steel bars 1 embedded at the connecting ends of the two precast components 9. A sleeve 12 is located between the two precast components 9, and the ends of the connecting steel bars 1 extending out of the precast components 9 are inserted into the sleeve 12 to form an assembly. Furthermore, concrete is poured into the gap between the two precast components 9. Figure 63 As shown, each precast component 9 has multiple pre-embedded connecting steel bars 1. The positions of the steel bars 1 on different components correspond and are connected by sleeves 12. Figures 64-66 As shown, the precast component 9 can be two horizontal components 91 and two vertical components 92, with the reinforcing bars 1 connected by sleeves 12, and the connection positions are all located in the post-cast strip 93. Figure 67As shown, the assembly of multiple components can also combine the connection method described in this embodiment with the connection method in embodiment 3. Example 7

[0143] like Figure 68 As shown, when the precast component 9 is a vertical component 92, such as a precast wall, a double layer of reinforcing bars 1 is generally installed inside the wall, and the embedded sleeve 12 is also correspondingly double-layered. However, since the outer diameter of the sleeve 12 is larger than the diameter of the reinforcing bar 1, the thickness of the concrete protective layer between the outer wall of the sleeve 12 and the outer surface of the vertical component will be relatively small. For example: the diameter of the reinforcing bar 1 is 16mm, the diameter of the enlarged head 11 is 26mm, and the outer diameter of the sleeve 12 is 40mm. Therefore, the radius of the sleeve 12 is 12mm larger than the radius of the reinforcing bar 1. Assuming the protective layer of the reinforcing bar 1 is 35mm, the protective layer at the sleeve 12 is only 23mm. Since, generally, the ends of multiple reinforcing bars 1 are connected and reinforced with stirrups 94, if the stirrups 94 are placed outside the sleeve 12, the protective layer will be significantly insufficient, affecting the quality of the precast component 9. Therefore, if... Figure 5 and Figure 68 As shown, the bottom end of the sleeve 12 is a constricted opening 21, which then expands outward to form a flared opening 28, thereby forming a circumferential stirrup groove 23 on the outer wall of the sleeve 12. The stirrups 94 can be fitted into the stirrup groove 23, thus overcoming the problem of insufficient protective layer. Alternatively, as shown... Figure 13 and Figure 69 As shown, the outer wall of the sleeve 12 is recessed inward to form an annular stirrup groove 23, and the stirrup 94 is placed in the stirrup groove 23, thereby overcoming the problem of insufficient protective layer.

[0144] In addition, such as Figure 12 and Figure 70 As shown, stirrup through holes 24 can also be made on the outer wall of sleeve 12, through which stirrups 94 can pass to connect multiple reinforcing bars 1, which can also reduce the impact on the thickness of the protective layer. Further, looking back... Figure 12 A double-layer partition plate 41 is provided inside the sleeve 12, and the stirrup through hole 24 is located in the middle of the double-layer partition plate 41, so that the positions of the steel bar 1 and the stirrup 94 inside the sleeve 12 do not interfere with each other. Example 8

[0145] A method for using a steel reinforcement connection structure, wherein sealing gaskets 3 are provided at both ends of the sleeve 12, and the cementitious material 13 is filled on site, the method includes the following steps:

[0146] S1. Fill the cylinder 2 with cementitious material 13;

[0147] S2. Seal the port of cylinder 2 with sealing gasket 3;

[0148] S3. The connecting steel bar 1 pierces the sealing gasket 3 and enters the cylinder 2. The cementitious material 13 wraps the connecting steel bar 1 and connects the cylinder 2 with the steel bar 1. Example 9

[0149] A method for using a steel reinforcement connection structure, wherein both ends of the sleeve 12 are provided with sealing gaskets 3, and the cementitious material 13 is a pre-inserted capsule 6, the method comprising the following steps:

[0150] S1. Place a capsule 6 containing gelling material 13 inside the cylinder 2;

[0151] S2. Seal the port of cylinder 2 with sealing gasket 3;

[0152] S3. The connecting steel bar 1 pierces the sealing gasket 3 and enters the cylinder 2, and the cementitious material 13 wraps the connecting steel bar 1.

[0153] Example 10:

[0154] A method for using a steel reinforcement connection structure, wherein the sleeve 12 is provided with a sealing gasket 3 at only one end, and the sleeve 12 is pre-embedded in the precast component 9, the method comprising the following steps:

[0155] S1. One end of sleeve 12 is threaded or cold-pressed to a steel bar 1; or other connection methods as described in Example 5 are used.

[0156] S2. Fill the cylinder 2 with gelling material 13 or place the capsule 6 containing gelling material 13 into the cylinder 2.

[0157] S3. Seal the other end of the cylinder 2 with sealing gasket 3;

[0158] S4. Embed the sleeve 12 and the reinforcing bar 1 into the precast component 9. The end of the sleeve 12 with the sealing gasket 3 is flush with the end face of the precast component 9.

[0159] S5. The pre-embedded steel bar 1 of another precast component 9, as the connecting steel bar 1, pierces the sealing gasket 3 and enters the cylinder 2, and the cementitious material 13 wraps the connecting steel bar 1.

[0160] Example 11:

[0161] A method for using a steel reinforcement connection structure, which differs from Example 10 in that the cementitious material 13 is injected into the sleeve 12 via post-grouting. The method includes the following steps:

[0162] S1. One end of the sleeve 12 is threaded or cold-pressed to a steel bar 1; the sleeve 12 and the steel bar 1 are pre-embedded in the precast component 9, and the port of the sleeve 12 with the sealing gasket 3 is flush with the end face of the precast component 9.

[0163] S2. Seal the port of cylinder 2 with sealing gasket 3;

[0164] S3. Inject the cementitious material 13 into the cylinder 2 through the grouting hole 201 and the grout outlet hole 202;

[0165] S4. The pre-embedded steel bar 1 of another precast component 9, as the connecting steel bar 1, pierces the sealing gasket 3 and enters the cylinder 2, and the cementitious material 13 wraps the connecting steel bar 1.

[0166] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A steel reinforcement connection structure, comprising a sleeve (12) and steel reinforcement (1) to be connected; characterized in that: The sleeve (12) includes a cylinder (2) and a sealing gasket (3) located at the port of the cylinder (2); the sealing gasket (3) forms a closed chamber inside the cylinder (2), and a cementing material (13) is placed in the closed chamber of the cylinder (2); the reinforcing bar (1) pierces the sealing gasket (3) and enters the cylinder (2), the cementing material (13) wraps the reinforcing bar (1) and connects the cylinder (2) to the reinforcing bar (1).

2. The steel reinforcement connection structure according to claim 1, characterized in that: The sealing gasket (3) is a circular gasket. The outer circumference of the sealing gasket (3) is a complete ring, and the surface of the inner circumference is provided with multiple recessed indentations (31) along the radial direction so that the gasket is destroyed at the indentations (31) when the connecting steel bar (1) is inserted.

3. The steel reinforcement connection structure according to claim 1, characterized in that: The sleeve (12) also includes a clamp for fixing the sealing gasket (3); a step (22) is provided on the inner wall of the cylinder (2) near the port, and the sealing gasket (3) fits against the step (22) after being inserted from the port; the clamp holds the sealing gasket (3) in place at the step (22).

4. A steel reinforcement connection structure according to claim 1, characterized in that: The sleeve (12) also includes an end cap (341) for fixing the sealing gasket (3); the sealing gasket (3) fits against the port; the end cap (341) is threadedly engaged with the sleeve (12), and the end cap (341) holds the sealing gasket (3) at the port of the sleeve (12); the end cap (341) is provided with an opening (342) for the reinforcing bar (1) to pass through.

5. A steel reinforcement connection structure according to claim 1, characterized in that: The cylinder (2) contains several capsules (6), which are divided into several groups. Each group of capsules (6) contains a gelling material (13). The steel bar (1) extends into the sleeve (12) and punctures the capsules (6) inside the cylinder (2). The gelling material (13) solidifies after contact with air, wrapping the steel bar (1) and connecting the steel bar (1) to the cylinder (2).

6. A steel reinforcement connection structure according to claim 1, characterized in that: An enlarged head (11) is provided at the end of the connecting steel bar (1).

7. A steel reinforcement connection structure according to claim 6, characterized in that: Inside the cylinder (2), there are snap-fit ​​blocks (77) evenly distributed around the axis of the cylinder (2). The snap-fit ​​blocks (77) can be opened away from the axis to allow the enlarged head (11) of the reinforcing bar (1) to be inserted. After the reinforcing bar (1) is inserted, the snap-fit ​​blocks (77) can come together, and the inner diameter of the formed inner circle is smaller than the diameter of the enlarged head (11), thus snapping the enlarged head (11) into the cylinder (2).

8. A steel reinforcement connection structure according to claim 1, characterized in that: The outer wall of the sleeve (12) is recessed inward to form an annular stirrup groove (23), or the outer wall of the sleeve (12) is provided with a stirrup through hole (24). The stirrup (94) is wrapped around the annular stirrup groove (23) or passes through the stirrup through hole (24) to connect multiple sleeves (12) into a whole.

9. A steel reinforcement connection structure according to any one of claims 1-8, characterized in that: One end of the sleeve (12) is a flat opening (7), and the reinforcing bar (1) is provided with an enlarged head (11). The enlarged head (11) is a flat head (73). The flat head (73) is inserted into the cylinder (2) through the flat opening (7) and rotated to engage with the cylinder (2). The other end of the sleeve (12) is provided with a sealing gasket (3). A partition plate (41) is provided inside the cylinder (2). The space between the partition plate (41) and the sealing gasket (3) is a closed chamber.

10. A steel reinforcement connection structure according to any one of claims 1-8, characterized in that: Multiple snap-fit ​​holes (76) are opened along the circumference of the side wall at one end of the cylinder (2). Snap-fit ​​blocks (77) are installed in the snap-fit ​​holes (76). The two ends of the snap-fit ​​blocks (77) are located on the inner and outer sides of the cylinder (2), respectively. An elastic element (78) is connected to the outer end of the cylinder (2). The elastic element (78) is fixedly installed on the cylinder (2). An enlarged head (11) is provided at one end of the steel bar (1) that extends into the cylinder (2). The snap-fit ​​blocks (77) can snap the enlarged head (11) into the cylinder (2). A sealing gasket (3) is provided at the other end of the sleeve (12). A partition plate (41) is provided inside the cylinder (2). The space between the partition plate (41) and the sealing gasket (3) is a closed chamber.

11. A steel reinforcement connection structure according to any one of claims 1-8, characterized in that: Multiple elastic slips (75) are evenly distributed around the inner wall of the cylinder (2) near one end. The elastic slips (75) are inclined on the inner wall of the cylinder (2). The small circular opening (342) formed by the multiple annular slips is close to the center of the cylinder (2), and the large circular opening (342) is far away from the center of the cylinder (2). An enlarged head (11) is provided at one end that extends into the cylinder (2). The elastic slips (75) can engage the enlarged head (11) inside the cylinder (2). A sealing gasket (3) is provided at the other end of the sleeve (12). A partition plate (41) is provided inside the cylinder (2). The space between the partition plate (41) and the sealing gasket (3) is a closed chamber.

12. A steel reinforcement connection structure according to any one of claims 1-8, characterized in that: One end of the cylinder (2) is a tapered constriction (211), and a grouting hole (201) for cement slurry to enter is provided on the cylinder (2); one end of the reinforcing bar (1) extends into the cylinder (2) and expands outward to form a frustum-shaped enlarged head (11), which is fixed by concrete poured into the sleeve (12); the other end of the sleeve (12) is provided with a sealing gasket (3), and a partition plate (41) is provided inside the cylinder (2), and the partition plate (41) and the sealing gasket (3) form a closed cavity.

13. A prefabricated component, characterized in that: A sleeve (12) as described in any one of claims 1-8 is pre-embedded in the precast component (9); the end of the sleeve (12) with a sealing gasket (3) is flush with one end face of the precast component (9); a steel bar (1) is connected to the other end of the sleeve (12) and pre-embedded in the component.

14. An assembly, characterized in that: The assembly comprises at least two interlocking prefabricated components (9), each prefabricated component (9) having a sleeve (12) as described in any one of claims 1-8 embedded within it. The sleeve (12) has a sealing gasket (3) at one end flush with one end face of the prefabricated component (9). The other end of the sleeve (12) is connected to a reinforcing bar (1), with one end of the reinforcing bar (1) away from the sleeve (12) extending out of the other end face of the prefabricated component (9) and being configured as an enlarged head (11). The enlarged head (11) of the reinforcing bar (1) located on one prefabricated component (9) is inserted into the sleeve (12) of the adjacent prefabricated component (9), thereby forming an assembly.

15. An assembly, characterized in that: The system includes multiple sets of steel bar connection structures as described in any one of claims 1-8, and also includes two precast components (9). The connection ends of the two precast components (9) are pre-embedded with corresponding connecting steel bars (1). The end of the connecting steel bar (1) extending out of the precast component (9) is inserted into the sleeve (12) to achieve the precast connection.

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