A butt-joint type steel bar connector with gap compensation function and a connecting method

Abstract

The present application relates to a kind of butt type reinforcing bar connectors with gap compensation function and connecting method, belong to building engineering field.The present application includes for being connected with No.1 reinforcing bar No.1 connecting sleeve and for being connected with No.2 reinforcing bar No.2 connecting sleeve, its structural features are as follows:No.1 connecting sleeve and No.2 connecting sleeve are also connected for reinforcing bar connector main body, the reinforcing bar connector main body includes bolt assembly and screw rod assembly, the bolt assembly is connected with screw rod assembly;The bolt assembly includes bolt and connecting nut, one end of the bolt is bolt head, the other end of the bolt is bolt stem, the bolt head and bolt stem are coaxially arranged, the screw rod assembly includes screw rod, one end of the screw rod is screw rod head, the other end of the screw rod is screw rod stem, the screw rod head and screw rod stem are coaxially arranged.

Description

Technical Field

[0001] This invention relates to a top-mounted rebar connector with gap compensation function and a connection method, belonging to the field of building engineering. Background Technology

[0002] In building construction, it is often necessary to connect steel bars. For prefabricated concrete structures, such as the connection between precast concrete components and foundations, or the connection between precast beams and precast columns, the steel bars to be connected are already cast into the concrete components. The steel bars on both sides to be connected cannot be rotated or moved. Moreover, in the same group of steel bars, the axes of two steel bars cannot be guaranteed to be on the same axis (i.e., radial deviation). In addition, multiple groups of steel bars usually need to be connected, and the spacing between the two steel bars in each group also has deviation (i.e., axial deviation). This requires steel bar connectors to have radial and axial compensation capabilities to ensure smooth connection of steel bars and load transmission.

[0003] In the existing technology, grouting sleeves, double-threaded sleeves, or internal and external threaded sleeves are commonly used to connect two steel bars. This has the following disadvantages: (1) When using grouting sleeves for connection, the operation is complicated and the cost is high. Moreover, the connection strength depends on the chemical process, and the connection quality is difficult to control. (2) When using double-threaded sleeves or internal and external threaded sleeves for mechanical connection, regardless of whether it is a double-threaded sleeve or internal and external threaded sleeve connection method, most of them also use a pipe structure with both internal and external threads. The structure is complicated, there are many parts, and the parts have high processing accuracy requirements, resulting in high cost and construction difficulty. A connection involves many threaded pairs. Due to the double-layer nut structure, there may be up to 4 threaded pairs.

[0004] In view of this, patent document with application number CN201611207250.8 discloses a mechanical connection device and a method for connecting steel bars in the modular construction of steel bars. In the above-mentioned prior art, after the first steel bar and the second steel bar are connected, there is a gap between the ends of the two steel bars, which cannot be effectively tightened and affects the connection quality. When there is a deviation between the axes of the first steel bar and the second steel bar, and the axes of the two steel bars cannot be guaranteed to be on the same axis (i.e., radial deviation), the connection is difficult. Since the first inner thread sleeve 1 and the second inner thread sleeve 2 need to be provided with internal threads and internal connecting threads 6 and 5, their structure is bulky and inconvenient to use.

[0005] In view of this, the patent document with application number CN201120140646.1 discloses an adjustable rebar threaded connection device. The above-mentioned prior art cannot directly tighten two rebars. It can tighten the end face of the second rebar with the end face of the first rebar by setting a shim, which affects the connection quality. At the same time, it lacks a positioning structure for centering and guiding during connection, making it inconvenient to connect the two rebars.

[0006] In view of this, an adjustable rebar connector is disclosed in patent document with application number CN201921321724.0. In the above-mentioned prior art, the first rebar is connected to the first connecting sleeve using a threaded rod structure, and the second rebar is connected to the second connecting sleeve using a threaded rod structure. Although a double-layer threaded structure is not used, it requires lengthening the thread, which increases processing costs and affects connection quality. In addition, it does not have radial compensation capability.

[0007] In view of this, a sleeve-type steel bar connector using a connecting end member is disclosed in patent document with application number CN201480049649.0. The above-mentioned prior art is used for connecting when the steel bars at both ends can be pulled, but cannot be connected when the two steel bars are fixed.

[0008] In view of this, the patent document with application number US15556684 discloses an Adjustable compactlifting coupler and method of use. The above-mentioned prior art adopts the scheme of inner and outer threaded sleeves and has radial compensation capability, but the structure is complex, the size is huge, and it is inconvenient to operate. Summary of the Invention

[0009] The purpose of this invention is to overcome the above-mentioned deficiencies in the prior art and to provide a top-mounted rebar connector and connection method with a reasonable structural design that can connect two rebars by the top-mounted fit of the bolt head and the screw head.

[0010] The technical solution adopted by the present invention to solve the above problems is: including a first connecting sleeve and a second connecting sleeve, the structural feature of which is: it also includes a steel bar connector body for connecting the first connecting sleeve and the second connecting sleeve, the steel bar connector body including a bolt assembly and a screw assembly, the bolt assembly being connected to the screw assembly;

[0011] The bolt assembly includes a bolt, a connecting sleeve, and a first locking nut. One end of the bolt is the bolt head, and the other end is the bolt shank. The bolt head and bolt shank are coaxially aligned. The first locking nut is fitted onto the bolt shank and engages with the first connecting sleeve.

[0012] The screw assembly includes a screw, a screw adjusting nut, and a second locking nut. One end of the screw is the screw head, and the other end is the screw shank. The screw head and screw shank are coaxially aligned. The screw adjusting nut and the second locking nut are both fitted onto the screw shank, with the screw adjusting nut engaging with a connecting sleeve and the second locking nut engaging with a second connecting sleeve.

[0013] The first connecting sleeve is connected to the bolt shank, and the second connecting sleeve is connected to the screw shank. The connecting threaded sleeve is fitted onto the bolt shank, and the bolt head and the screw head are engaged by the connecting threaded sleeve. This top-type rebar connector can mechanically connect the rebars between precast beams / columns through the rebar connector body, which is more convenient for construction. The first locking nut can be used to lock the bolt shank to the first connecting sleeve. The screw adjusting nut can be used to adjust the length of the screw shank from the second connecting sleeve, and can also be used to lock the screw head to the connecting threaded sleeve. The second locking nut can be used to lock the screw shank to the second connecting sleeve.

[0014] Furthermore, the bolt shank is threadedly connected to the first connecting sleeve, the screw shank is threadedly connected to the second connecting sleeve, the bolt head is located inside the connecting sleeve, and the connecting sleeve is threadedly connected to the screw head.

[0015] Furthermore, a limiting ring is provided on the connecting threaded sleeve, and a limiting platform is provided on the bolt head. The limiting platform cooperates with the limiting ring. The limiting platform is frustum-shaped, annular, or spherical, and is used to adapt to the limiting ring. The shape of the limiting platform includes, but is not limited to, the shapes listed above. The shape of the limiting ring and the shape of the limiting platform cooperate with each other so that the bolt shank can be pulled by the connecting threaded sleeve, so that the bolt head is connected to the bolt shank. When the bolt head is pulled by the connecting threaded sleeve, the limiting ring and the limiting platform can bear the tensile load.

[0016] Furthermore, the bolt head is provided with a positioning protrusion, and the screw head is provided with a positioning groove, the positioning groove cooperating with the positioning protrusion. The positioning protrusion is conical, cylindrical, or spherical, used to adapt to the positioning groove. The shape of the positioning protrusion includes, but is not limited to, the shapes listed above. The shape of the positioning groove cooperates with the shape of the positioning protrusion to achieve centering and guidance of the bolt head and the screw head.

[0017] Furthermore, the middle part of the limiting ring is a bolt through hole, and the bolt shank passes through the bolt through hole.

[0018] Furthermore, the diameter of the bolt through hole is larger than the diameter of the bolt shank. Compensation for radial deviations between the bolt head and the threaded rod head is achieved through the floating allowance of the bolt head within the connecting sleeve.

[0019] Furthermore, the screw rod is provided with a nut section, a screw-out section, and a connecting section. In the initial state, there is an axial gap between the bolt head and the screw head, and the screw-out section is greater than the axial gap. The length of the screw-out section is used to compensate for the length of the axial gap by screwing out the screw-out section. The length of the connecting section is determined by the length of the screw rod in the second connecting sleeve.

[0020] Furthermore, the first connecting sleeve is threaded or crimped to the first reinforcing bar, and the second connecting sleeve is threaded or crimped to the second reinforcing bar. If the rear of the first and second connecting sleeves is made with a smooth hole, they can be connected to the first and second reinforcing bars using a crimping method. If they are made with internal threads, they can be used to connect to the threaded ends of the reinforcing bars, thus achieving the connection between the first and second connecting sleeves and the first and second reinforcing bars.

[0021] Furthermore, another technical objective of the present invention is to provide a rebar connection method for a top-mounted rebar connector with gap compensation function.

[0022] The above-mentioned technical objective of the present invention is achieved through the following technical solution.

[0023] The first type of rebar connection method using a top-mounted rebar connector with gap compensation involves pre-connecting the first and second connecting sleeves to the first and second rebars respectively before connection, roughly aligning the first and second rebars. When the screw-out section exceeds the axial gap, the first and second connecting sleeves can be connected through the rebar connector body. Its characteristic is that the method of connecting the first and second connecting sleeves using the rebar connector body is as follows:

[0024] (1) Rotate the No. 1 locking nut to make the bolt shank in the No. 1 connecting sleeve in an unlocked state. Rotate the screw adjusting nut to make the screw shank unscrew the No. 2 connecting sleeve until the screw head and the bolt head are in contact.

[0025] During the top-fitting process, the axial force provided by the No. 2 connecting sleeve, which is screwed out by the screw rod, is used to center the positioning protrusion and the positioning groove. If the end face of the screw head and the end face of the bolt head cannot be fully fitted after the centering, the screw rod is screwed out again. The axial force provided by the screw rod will force the end face of the screw head to be fully fitted with the end face of the bolt head.

[0026] (2) Move the connecting threaded sleeve to the bolt head and make the connecting threaded sleeve threadedly connected to the bolt head;

[0027] (3) Tighten the connecting sleeve to the head of the screw, and lock the screw rod to the No. 2 connecting sleeve;

[0028] (4) Rotate the No. 1 locking nut to the end face of the No. 1 connecting sleeve and lock the bolt rod to the No. 1 connecting sleeve. Rotate the screw adjusting nut to the end face of the connecting thread sleeve and lock the connecting thread sleeve to the head of the screw. The connection is complete.

[0029] The second type of rebar connection method using a top-mounted rebar connector with gap compensation involves pre-connecting the first and second connecting sleeves to the first and second rebars respectively before connection, roughly aligning the first and second rebars. When the screw-out section exceeds the axial gap, the first and second connecting sleeves can be connected through the rebar connector body. Its characteristic is that the method of connecting the first and second connecting sleeves using the rebar connector body is as follows:

[0030] (1) Rotate the No. 1 locking nut to make the bolt shank in the No. 1 connecting sleeve in an unlocked state. Rotate the screw adjusting nut to make the screw shank unscrew the No. 2 connecting sleeve until the screw head and the bolt head are in contact.

[0031] When the bolt is in contact with the bolt, the diameter of the bolt hole is set to be larger than the diameter of the bolt shank. The radial deviation is compensated by the floating allowance of the bolt head in the connecting sleeve. The axial force provided by the unscrewed bolt shank will force the end face of the bolt head to fit completely with the end face of the bolt head.

[0032] (2) Move the connecting threaded sleeve to the bolt head and make the connecting threaded sleeve threadedly connected to the bolt head;

[0033] (3) Tighten the connecting sleeve to the head of the screw, and lock the screw rod to the No. 2 connecting sleeve;

[0034] (4) Rotate the No. 1 locking nut to the end face of the No. 1 connecting sleeve and lock the bolt rod to the No. 1 connecting sleeve. Rotate the screw adjusting nut to the end face of the connecting thread sleeve and lock the connecting thread sleeve to the head of the screw. The connection is complete.

[0035] Compared with the prior art, the present invention has the following advantages: 1. The No. 1 steel bar and the No. 2 steel bar are connected by the No. 1 connecting sleeve and the No. 2 connecting sleeve respectively. The bolt assembly is connected to the No. 1 connecting sleeve and the screw assembly is connected to the No. 2 connecting sleeve. During assembly, the bolt assembly and the screw assembly are in a non-locking state, and the bolt and the screw are exposed outside the No. 1 connecting sleeve and the No. 2 connecting sleeve by a certain length. The elasticity provided by the thread clearance and the exposed length helps to connect the threaded assembly of the threaded sleeve and the screw head.

[0036] 2. The bolt head and screw head can be aligned by setting positioning protrusions and positioning grooves to achieve a fit between the end face of the bolt head and the end face of the screw head; alternatively, the diameter of the bolt through hole can be set to be larger than the diameter of the bolt shank, so that the bolt head floats within the connecting sleeve. The floating allowance of the bolt head within the connecting sleeve can compensate for the radial deviation between the bolt head and the screw head, thereby achieving a fit between the end face of the bolt head and the end face of the screw head.

[0037] 3. The No. 1 and No. 2 connecting sleeves can be standard sleeves, and this rebar connector can be used with standard sleeves. Attached Figure Description

[0038] Figure 1 This is a cross-sectional structural schematic diagram of the steel bar connector of Embodiment 1 of the present invention.

[0039] Figure 2 This is a three-dimensional structural schematic diagram of the steel bar connector of Embodiment 1 of the present invention.

[0040] Figure 3 This is a schematic diagram (1) of the connection process of the steel bar connector in Embodiment 1 of the present invention.

[0041] Figure 4 This is a schematic diagram (2) of the connection process of the steel bar connector in Embodiment 1 of the present invention.

[0042] Figure 5 This is a schematic diagram (3) of the connection process of the steel bar connector in Embodiment 1 of the present invention.

[0043] Figure 6 This is a schematic diagram (4) of the connection process of the steel bar connector in Embodiment 1 of the present invention.

[0044] Figure 7 This is a schematic diagram (5) of the connection process of the steel bar connector in Embodiment 1 of the present invention.

[0045] Figure 8 This is a cross-sectional structural schematic diagram of the rebar connector of Embodiment 2 of the present invention.

[0046] Figure 9 This is a three-dimensional structural schematic diagram of the steel bar connector of Embodiment 2 of the present invention.

[0047] Figure 10 This is a schematic diagram (1) of the connection process of the steel bar connector in Embodiment 2 of the present invention.

[0048] Figure 11 This is a schematic diagram (2) of the connection process of the steel bar connector in Embodiment 2 of the present invention.

[0049] Figure 12 This is a schematic diagram (3) of the connection process of the steel bar connector in Embodiment 2 of the present invention.

[0050] Figure 13 This is a schematic diagram (4) of the connection process of the steel bar connector in Embodiment 2 of the present invention.

[0051] Figure 14 This is a schematic diagram (5) of the connection process of the steel bar connector in Embodiment 2 of the present invention.

[0052] In the diagram: Bolt assembly 1, Screw assembly 2, Connecting sleeve #1 3, Connecting sleeve #2 4, Rebar #1 5, Rebar #2 6.

[0053] 11. Bolt; 12. Connecting sleeve; 13. No. 1 lock nut; 14. Bolt head; 15. Bolt shank; 16. Positioning protrusion; 17. Limiting ring; 18. Limiting platform; 19. Bolt through hole.

[0054] 21. Screw; 22. Screw adjusting nut; 23. No. 2 locking nut; 24. Screw head; 25. Screw shank; 26. Positioning groove.

[0055] Nut section L1, unscrewing section L2, connecting section L3, axial clearance G. Detailed Implementation

[0056] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0057] Example 1 (e.g.) Figure 1-7 (As shown).

[0058] The top-type rebar connector with gap compensation function in this embodiment includes a first connecting sleeve 3 for connecting with a first rebar 5 and a second connecting sleeve 4 for connecting with a second rebar 6, and a rebar connector body for connecting the first connecting sleeve 3 and the second connecting sleeve 4. The rebar connector body includes a bolt assembly 1 and a screw assembly 2. The bolt assembly 1 is connected to the screw assembly 2. The first connecting sleeve 3 is threaded or crimped to the first rebar 5, and the second connecting sleeve 4 is threaded or crimped to the second rebar 6.

[0059] In this embodiment, the bolt assembly 1 includes a bolt 11, a connecting sleeve 12, and a first locking nut 13. One end of the bolt 11 is a bolt head 14, and the other end of the bolt 11 is a bolt shank 15. The bolt head 14 and the bolt shank 15 are arranged coaxially. The first locking nut 13 is fitted onto the bolt shank 15, and the first locking nut 13 cooperates with the first connecting sleeve 3.

[0060] The screw assembly 2 in this embodiment includes a screw 21, a screw adjusting nut 22, and a second locking nut 23. One end of the screw 21 is a screw head 24, and the other end of the screw 21 is a screw rod 25. The screw head 24 and the screw rod 25 are coaxially arranged. The screw adjusting nut 22 and the second locking nut 23 are both fitted on the screw rod 25. The screw adjusting nut 22 cooperates with the connecting sleeve 12, and the second locking nut 23 cooperates with the second connecting sleeve 4.

[0061] In this embodiment, the first connecting sleeve 3 is threadedly connected to the bolt shank 15, the second connecting sleeve 4 is threadedly connected to the screw shank 25, the connecting thread sleeve 12 is fitted onto the bolt shank 15, and the bolt head 14 and the screw head 24 are engaged by the connecting thread sleeve 12. The bolt head 14 is located inside the connecting thread sleeve 12, and the connecting thread sleeve 12 is threadedly connected to the screw head 24.

[0062] In this embodiment, a positioning protrusion 16 is provided on the bolt head 14, and a positioning groove 26 is provided on the screw head 24. The positioning groove 26 cooperates with the positioning protrusion 16. The positioning protrusion 16 is located in the positioning groove 26. The positioning protrusion 16 can be conical, cylindrical or spherical, and is used to adapt to the positioning groove 26. By rotating the screw adjusting nut 22 to unscrew the screw head 24, the positioning protrusion 16 and the positioning groove 26 can achieve the centering and alignment function.

[0063] In this embodiment, a limiting ring 17 is provided on the connecting screw sleeve 12, and a limiting platform 18 is provided on the bolt head 14. The limiting platform 18 cooperates with the limiting ring 17. The middle part of the limiting ring 17 is a bolt through hole 19, and the bolt shank 15 passes through the bolt through hole 19. The limiting ring 17 contacts the limiting platform 18. The limiting platform 18 can be frustum-shaped, annular, or spherical, and is used to adapt to the limiting ring 17. After the connecting screw sleeve 12 is screwed into the bolt head 24, the limiting platform 18 can be pressed by the limiting ring 17 to achieve a firm connection.

[0064] In this embodiment, the screw rod 25 is provided with a nut section L1, a screw-out section L2, and a connecting section L3. In the initial state, there is an axial gap G between the bolt head 14 and the screw head 24, and the screw-out section L2 is greater than the axial gap G. The nut section L1 is used to install the screw adjusting nut 22 and the second locking nut 23 in the initial state. The screw-out section L2 is used to compensate for the length of the axial gap G. The connecting section L3 is used to connect the second connecting sleeve 4. The length of the connecting section L3 is determined by the length of the screw 21 in the second connecting sleeve 4, and the length of the axial gap G is determined by the main body of the steel bar connector.

[0065] "Initial state" refers to the state before the main body of the rebar connector is tightened, after bolt assembly 1 is connected to connecting sleeve 3 and screw assembly 2 is connected to connecting sleeve 4. Figure 3 As shown.

[0066] The rebar connection method of the top-type rebar connector with gap compensation function in this embodiment is as follows: Before connection, the first connecting sleeve 3 and the second connecting sleeve 4 are connected to the first rebar 5 and the second rebar 6 respectively, and the first rebar 5 and the second rebar 6 are roughly aligned. When the screw-out section L2 is greater than the axial gap G, the first connecting sleeve 3 and the second connecting sleeve 4 can be connected through the rebar connector body.

[0067] The connection process of the main body of the rebar connector is as follows:

[0068] (1) Rotate the first locking nut 13 to make the bolt shank 15 in the first connecting sleeve 3 in a non-locked state (so that the bolt shank 15 can rotate in the first connecting sleeve 3, so that the length of the bolt shank 15 extending out of the first connecting sleeve 3 can be adjusted), rotate the screw adjusting nut 22 to make the screw shank 25 screw out of the second connecting sleeve 4 (at this time, the screw shank 25 is in a non-locked state in the second connecting sleeve 4, and when the screw adjusting nut 22 is rotated, the screw adjusting nut 22 contacts the screw head 24, such as Figure 3 (as shown), until the screw head 24 and the bolt head 14 are in contact with each other;

[0069] The screw 21 and the screw adjusting nut 22 can be an integral structure (i.e., a structure similar to the screw adjusting nut 22 is directly machined on the screw 21, which also makes it easy to unscrew the screw 21), or they can be separate structures (i.e., Embodiment 1 in this application).

[0070] During the top-fitting process, the axial force provided by the second connecting sleeve 4, achieved by unscrewing the screw rod 25, aligns the positioning protrusion 16 with the positioning groove 26. If, after alignment, the end face of the screw head 24 and the end face of the bolt head 14 cannot be fully fitted, the screw rod 25 is further unscrewed. The axial force provided by the screw rod 25 will force the end face of the screw head 24 to fully fit with the end face of the bolt head 14 (e.g., ...). Figure 4 (As shown).

[0071] (2) Move the connecting threaded sleeve 12 to the bolt head 14, and make the connecting threaded sleeve 12 threadedly connected to the bolt head 24 (i.e., screw the connecting threaded sleeve 12 onto the bolt head 24 with 2-3 threads, and then rotate the bolt adjusting nut 22 and the second locking nut 23 in the opposite direction for a certain distance, so that there is a distance between the bolt head 24 and the bolt adjusting nut 22, and between the bolt adjusting nut 22 and the second locking nut 23, such as... Figure 5 (As shown).

[0072] (3) Tighten the connecting sleeve 12 to the screw head 24, and lock the screw rod 25 to the second connecting sleeve 4 (i.e., tighten the connecting sleeve 12 so that the limiting ring 17 contacts the limiting platform 18, and then rotate the second locking nut 23 so that the second locking nut 23 contacts the second connecting sleeve 4 to lock the screw rod 25 to the second connecting sleeve 4, as shown). Figure 6 (As shown).

[0073] (4) Rotate the first locking nut 13 to the end face of the first connecting sleeve 3, and lock the bolt shank 15 to the first connecting sleeve 3. Rotate the screw adjusting nut 22 to the end face of the connecting threaded sleeve 12, and lock the connecting threaded sleeve 12 to the screw head 24. The connection is complete (e.g. Figure 7 (As shown); if the screw 21 and the screw adjusting nut 22 are an integral structure, when the screw head 24 and the bolt head 14 are aligned, they can be locked by tightening the connecting sleeve 12 and the screw head 24.

[0074] This top-type rebar connector is suitable for connecting small-diameter rebars, such as rebars with a diameter of less than 20mm. The positioning protrusion 16 and positioning groove 26 enable forced alignment of the bolt head 14 and the screw head 24, so that the end face of the bolt head 14 fits against the end face of the screw head 24.

[0075] Example 2 (e.g.) Figure 8-14 (As shown).

[0076] The top-type rebar connector with gap compensation function in this embodiment includes a first connecting sleeve 3 for connecting with a first rebar 5 and a second connecting sleeve 4 for connecting with a second rebar 6, and a rebar connector body for connecting the first connecting sleeve 3 and the second connecting sleeve 4. The rebar connector body includes a bolt assembly 1 and a screw assembly 2. The bolt assembly 1 is connected to the screw assembly 2. The first connecting sleeve 3 is threaded or crimped to the first rebar 5, and the second connecting sleeve 4 is threaded or crimped to the second rebar 6.

[0077] In this embodiment, the bolt assembly 1 includes a bolt 11, a connecting sleeve 12, and a first locking nut 13. One end of the bolt 11 is a bolt head 14, and the other end of the bolt 11 is a bolt shank 15. The bolt head 14 and the bolt shank 15 are arranged coaxially. The first locking nut 13 is fitted onto the bolt shank 15 and is in contact with the first connecting sleeve 3.

[0078] The screw assembly 2 in this embodiment includes a screw 21, a screw adjusting nut 22, and a second locking nut 23. One end of the screw 21 is a screw head 24, and the other end of the screw 21 is a screw rod 25. The screw head 24 and the screw rod 25 are coaxially arranged. The screw adjusting nut 22 and the second locking nut 23 are both fitted on the screw rod 25. The screw adjusting nut 22 is in contact with the connecting screw sleeve 12, and the second locking nut 23 is in contact with the second connecting sleeve 4.

[0079] In this embodiment, the first connecting sleeve 3 is threadedly connected to the bolt shank 15, the second connecting sleeve 4 is threadedly connected to the screw shank 25, the connecting thread sleeve 12 is fitted onto the bolt shank 15, and the bolt head 14 and the screw head 24 are engaged by the connecting thread sleeve 12. The bolt head 14 is located inside the connecting thread sleeve 12, and the connecting thread sleeve 12 is threadedly connected to the screw head 24.

[0080] In this embodiment, a positioning protrusion 16 is provided on the bolt head 14, and a positioning groove 26 is provided on the screw head 24. The positioning groove 26 cooperates with the positioning protrusion 16. The positioning protrusion 16 is located in the positioning groove 26. The positioning protrusion 16 can be conical, cylindrical or spherical, and is used to adapt to the positioning groove 26. By rotating the screw adjusting nut 22 to unscrew the screw head 24, the positioning protrusion 16 and the positioning groove 26 can achieve the centering and alignment function.

[0081] In this embodiment, a limiting ring 17 is provided on the connecting threaded sleeve 12, and a limiting platform 18 is provided on the bolt head 14. The limiting platform 18 cooperates with the limiting ring 17. The middle part of the limiting ring 17 is a bolt through hole 19, and the bolt shank 15 passes through the bolt through hole 19. The diameter of the bolt through hole 19 is larger than the diameter of the bolt shank 15. The limiting ring 17 contacts the limiting platform 18. The limiting platform 18 can be frustum-shaped, annular, or spherical, and is used to adapt to the limiting ring 17. After the connecting threaded sleeve 12 is screwed into the bolt head 24, the limiting ring 17 can press the limiting platform 18 to achieve a firm connection.

[0082] In this embodiment, the screw rod 25 is provided with a nut section L1, a screw-out section L2, and a connecting section L3. In the initial state, there is an axial gap G between the bolt head 14 and the screw head 24, and the screw-out section L2 is greater than the axial gap G. The nut section L1 is used to install the screw adjusting nut 22 and the second locking nut 23 in the initial state. The screw-out section L2 is used to compensate for the length of the axial gap G. The connecting section L3 is used to connect the second connecting sleeve 4. The length of the connecting section L3 is determined by the length of the screw 21 in the second connecting sleeve 4, and the length of the axial gap G is determined by the main body of the steel bar connector.

[0083] "Initial state" refers to the state before the main body of the rebar connector is tightened, after bolt assembly 1 is connected to connecting sleeve 3 and screw assembly 2 is connected to connecting sleeve 4. Figure 10 As shown.

[0084] The rebar connection method of the top-type rebar connector with gap compensation function in this embodiment is as follows: Before connection, the first connecting sleeve 3 and the second connecting sleeve 4 are connected to the first rebar 5 and the second rebar 6 respectively. The first rebar 5 and the second rebar 6 are roughly aligned. When the screw-out section L2 is greater than the axial gap G, the first connecting sleeve 3 and the second connecting sleeve 4 can be connected through the rebar connector body.

[0085] The connection process of the main body of the rebar connector is as follows:

[0086] (1) Rotate the first locking nut 13 to make the bolt shank 15 in the first connecting sleeve 3 in a non-locked state (so that the bolt shank 15 can rotate in the first connecting sleeve 3, so that the length of the bolt shank 15 extending out of the first connecting sleeve 3 can be adjusted), rotate the screw adjusting nut 22 to make the screw shank 25 screw out of the second connecting sleeve 4 (at this time, the screw shank 25 is in a non-locked state in the second connecting sleeve 4, and when the screw adjusting nut 22 is rotated, the screw adjusting nut 22 contacts the screw head 24, such as Figure 10 (as shown), until the screw head 24 and the bolt head 14 are in contact with each other;

[0087] The screw 21 and the screw adjusting nut 22 can be an integral structure (i.e., a structure similar to the screw adjusting nut 22 is directly machined on the screw 21, which also makes it easy to unscrew the screw 21), or they can be separate structures (i.e., Embodiment 2 in this application).

[0088] During the top-fitting process, by setting the diameter of the bolt through hole 19 to be larger than the diameter of the bolt shank 15, the radial deviation is compensated by the floating allowance of the bolt head 14 within the connecting sleeve 12. The axial force provided by unscrewing the bolt shank 25 forces the end face of the bolt head 24 to fully fit with the end face of the bolt head 14 (e.g., ...). Figure 11 (As shown).

[0089] (2) Move the connecting threaded sleeve 12 to the bolt head 14, and make the connecting threaded sleeve 12 threadedly connected to the bolt head 24 (i.e., screw the connecting threaded sleeve 12 onto the bolt head 24 with 2-3 threads, and then rotate the bolt adjusting nut 22 and the second locking nut 23 in the opposite direction for a certain distance, so that there is a distance between the bolt head 24 and the bolt adjusting nut 22, and between the bolt adjusting nut 22 and the second locking nut 23, such as... Figure 12 (As shown).

[0090] (3) Tighten the connecting sleeve 12 to the screw head 24, and lock the screw rod 25 to the second connecting sleeve 4 (i.e., tighten the connecting sleeve 12 so that the limiting ring 17 contacts the limiting platform 18, and then rotate the second locking nut 23 so that the second locking nut 23 contacts the second connecting sleeve 4 to lock the screw rod 25 to the second connecting sleeve 4, as shown). Figure 13 (As shown).

[0091] (4) Rotate the first locking nut 13 to the end face of the first connecting sleeve 3, and lock the bolt shank 15 to the first connecting sleeve 3. Rotate the screw adjusting nut 22 to the end face of the connecting threaded sleeve 12, and lock the connecting threaded sleeve 12 to the screw head 24. The connection is complete (e.g. Figure 14 (As shown); if the screw 21 and the screw adjusting nut 22 are an integral structure, when the screw head 24 and the bolt head 14 are aligned, they can be locked by tightening the connecting sleeve 12 and the screw head 24.

[0092] This top-type rebar connector is suitable for connecting large-diameter rebars. By setting the diameter of the bolt through hole 19 to be larger than the diameter of the bolt shank 15, the bolt head 14 can float within the connecting sleeve 12. The floating allowance of the bolt head 14 within the connecting sleeve 12 compensates for the radial deviation between the bolt head 14 and the screw head 24.

[0093] Furthermore, it should be noted that the specific embodiments described in this specification may have different shapes and names of their parts and components. The above description in this specification is merely an illustrative example of the structure of the present invention.

Claims

1. A butt-joining connector with gap compensation function, comprising a first connecting sleeve (3) and a second connecting sleeve (4), characterized in that: It also includes a steel bar connector body for connecting the first connecting sleeve (3) and the second connecting sleeve (4), the steel bar connector body including a bolt assembly (1) and a screw assembly (2), the bolt assembly (1) being connected to the screw assembly (2); The bolt assembly (1) includes a bolt (11), a connecting sleeve (12), and a first locking nut (13). One end of the bolt (11) is a bolt head (14), and the other end of the bolt (11) is a bolt shank (15). The bolt head (14) and the bolt shank (15) are coaxially arranged. The first locking nut (13) is fitted onto the bolt shank (15), and the first locking nut (13) cooperates with the first connecting sleeve (3). The screw assembly (2) includes a screw (21), a screw adjusting nut (22), and a second locking nut (23). One end of the screw (21) is the screw head (24), and the other end is the screw rod (25). The screw head (24) and the screw rod (25) are coaxially arranged. The screw adjusting nut (22) and the second locking nut (23) are both fitted onto the screw rod (25). The screw adjusting nut (22) cooperates with the connecting sleeve (12), and the second locking nut (23) cooperates with the second connecting sleeve (4). The first connecting sleeve (3) is connected to the bolt shank (15), the second connecting sleeve (4) is connected to the screw shank (25), the connecting threaded sleeve (12) is fitted onto the bolt shank (15), and the bolt head (14) and the screw head (24) are engaged by the connecting threaded sleeve (12). A limiting ring (17) is provided on the connecting threaded sleeve (12), and a limiting platform (18) is provided on the bolt head (14). The limiting platform (18) cooperates with the limiting ring (17). The bolt head (14) is provided with a positioning protrusion (16), and the screw head (24) is provided with a positioning groove (26). The positioning groove (26) cooperates with the positioning protrusion (16). The middle part of the limiting ring (17) is a bolt through hole (19), and the bolt shank (15) passes through the bolt through hole (19). The diameter of the bolt through hole (19) is larger than the diameter of the bolt shank (15).

2. The abutting type reinforcing bar coupler having a gap compensation function according to claim 1, characterized in that: The bolt shank (15) is threaded to the first connecting sleeve (3), the screw shank (25) is threaded to the second connecting sleeve (4), the bolt head (14) is located inside the connecting sleeve (12), and the connecting sleeve (12) is threaded to the screw head (24).

3. The abutting type reinforcing bar coupler having a gap compensation function according to claim 1, characterized in that: The screw rod (25) is provided with a nut section (L1), a screw-out section (L2) and a connecting section (L3). In the initial state, there is an axial clearance (G) between the bolt head (14) and the screw head (24), and the screw-out section (L2) is greater than the axial clearance (G).

4. The abutting type reinforcing bar coupler having a gap compensation function according to claim 1, characterized in that: The first connecting sleeve (3) is threaded or crimped to the first reinforcing bar (5), and the second connecting sleeve (4) is threaded or crimped to the second reinforcing bar (6).

5. A method of connecting reinforcing bars with a spigot and socket reinforcing bar connector having a gap compensation function as claimed in any one of claims 1 to 4, characterised by: The method for connecting the No. 1 connecting sleeve (3) and the No. 2 connecting sleeve (4) using the main body of the steel bar connector is as follows: (1) Rotate the first locking nut (13) so that the bolt rod (15) is in the first connecting sleeve (3) in a non-locked state. Rotate the screw adjusting nut (22) so that the screw rod (25) is screwed out of the second connecting sleeve (4) until the screw head (24) and the bolt head (14) are in contact with each other. When the top is fitted, the positioning protrusion (16) and the positioning groove (26) are aligned by the axial force provided by the second connecting sleeve (4) provided by the screw rod (25). If the end face of the screw head (24) and the end face of the bolt head (14) cannot be fully fitted after alignment, the screw rod (25) is continued to be screwed out. The axial force provided by the screw rod (25) will force the end face of the screw head (24) to be fully fitted with the end face of the bolt head (14). (2) Move the connecting sleeve (12) to the bolt head (14) and make the connecting sleeve (12) threadedly connected to the bolt head (24); (3) Tighten the connecting sleeve (12) to the screw head (24) and lock the screw rod (25) to the second connecting sleeve (4); (4) Rotate the first locking nut (13) to the end face of the first connecting sleeve (3), and lock the bolt rod (15) to the first connecting sleeve (3). Rotate the screw adjusting nut (22) to the end face of the connecting sleeve (12), and lock the connecting sleeve (12) to the screw head (24). The connection is complete.

6. A method for connecting reinforcing bars using a top-mounted reinforcing bar connector with gap compensation function as described in any one of claims 1-4, characterized in that: The method for connecting the No. 1 connecting sleeve (3) and the No. 2 connecting sleeve (4) using the main body of the steel bar connector is as follows: (1) Rotate the first locking nut (13) so that the bolt rod (15) is in the first connecting sleeve (3) in a non-locked state. Rotate the screw adjusting nut (22) so that the screw rod (25) is screwed out of the second connecting sleeve (4) until the screw head (24) and the bolt head (14) are in contact with each other. When the top is fitted, by setting the diameter of the bolt through hole (19) to be larger than the diameter of the bolt shank (15), the radial deviation is compensated by the floating allowance of the bolt head (14) in the connecting sleeve (12). The axial force provided by the screw shank (25) will force the end face of the screw head (24) to fit completely with the end face of the bolt head (14). (2) Move the connecting sleeve (12) to the bolt head (14) and make the connecting sleeve (12) threadedly connected to the bolt head (24); (3) Tighten the connecting sleeve (12) to the screw head (24) and lock the screw rod (25) to the second connecting sleeve (4); (4) Rotate the first locking nut (13) to the end face of the first connecting sleeve (3), and lock the bolt rod (15) to the first connecting sleeve (3). Rotate the screw adjusting nut (22) to the end face of the connecting sleeve (12), and lock the connecting sleeve (12) to the screw head (24). The connection is complete.

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