A steel bar connector with double eccentricity adjustment function and connection method

Abstract

The present invention relates to a steel bar connector and a connection method with a double eccentric adjustment function, and belongs to the field of construction engineering. The present invention includes a No. 1 connection sleeve and a No. 2 connection sleeve, and is characterized in that: the No. 1 connection sleeve and the No. 2 connection sleeve are connected through a steel bar connector body; the steel bar connector body includes an eccentric bolt assembly and an eccentric screw assembly, the No. 1 connection sleeve is connected to the eccentric bolt assembly, the No. 2 connection sleeve is connected to the eccentric screw assembly, and the eccentric bolt assembly cooperates with the eccentric screw assembly; the eccentric bolt assembly includes an eccentric bolt and a connecting nut, the eccentric screw assembly includes an eccentric screw, the No. 1 connection sleeve is threadedly connected to the bolt rod, the No. 2 connection sleeve is threadedly connected to the screw rod, the connecting nut is on the bolt rod, and the bolt head and the screw head cooperate through the connecting nut.

Description

Technical Field

[0001] The invention relates to a steel bar connector with double eccentricity adjustment function and a connection method, belonging to the field of construction engineering. Background Art

[0002] In 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 have been cast in the concrete components. The steel bars on both sides cannot rotate, and there is a certain deviation in the axial direction. There is also a certain gap between the steel bars at both ends, and the gap between each group of steel bars is also different.

[0003] In the prior art, two steel bars are usually connected by grouting sleeves, double-layer threaded sleeves, or internal and external threaded sleeves, which have the following disadvantages: (1) When grouting sleeves are used for connection, the operation is cumbersome and the cost is high, and the connection strength depends on the chemical process, and the connection quality is difficult to control; (2) When mechanical connections such as double-layer threaded sleeves or internal and external threaded sleeves are used, regardless of the connection method of double-layer threaded sleeves or internal and external threaded sleeves, most of them also use a pipe body structure with both internal and external threads, which has a complex structure, many parts and high requirements for part processing accuracy, resulting in high cost and great construction difficulty; one connection involves many threaded pair connections, and due to the double-layer nut structure, there may be up to 4 threaded pair connections.

[0004] In view of this, a double eccentric steel bar connection device is disclosed in the patent document with application number CN 201821914415.X. In the above-mentioned prior art, the eccentric adjustment function is achieved by using eccentric inner and outer thread nuts and an eccentric sleeve. After adjustment, it cannot be locked and it is difficult to ensure strength.

[0005] In view of this, a steel bar connecting device is disclosed in the patent document with application number CN 202022055035.9. The steel bar connecting device in the above-mentioned prior art is large in size and inconvenient to use.

[0006] In view of this, a mechanical connection mechanism for steel bars is disclosed in a patent document with application number CN 202121092262.7. In the above-mentioned prior art, eccentric adjustment is achieved by setting a first eccentric wire sleeve (3) and a second eccentric wire sleeve (4). Since internal threads and external threads are set on the first eccentric wire sleeve (3) and the second eccentric wire sleeve (4), it will cause it to be inconvenient to control during adjustment. Summary of the invention

[0007] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a steel bar connector and connection method with a reasonable structural design, which is suitable for the case where the radial deviation of two steel bars is large and can cover the radial deviation of the two steel bars by doubling the eccentricity adjustment.

[0008] The technical solution adopted by the present invention to solve the above problem is: the steel bar connector with double eccentricity adjustment function includes a No. 1 connecting sleeve for connecting with a No. 1 steel bar and a No. 2 connecting sleeve for connecting with a No. 2 steel bar, and its structural characteristics are: the No. 1 connecting sleeve and the No. 2 connecting sleeve are connected by a steel bar connector body that can compensate for the distance between the axes of the No. 1 steel bar and the No. 2 steel bar during the connection process as the actual eccentricity;

[0009] The steel bar connector body comprises an eccentric bolt assembly and an eccentric screw assembly, the No. 1 connecting sleeve is connected to the eccentric bolt assembly, the No. 2 connecting sleeve is connected to the eccentric screw assembly, and the eccentric bolt assembly cooperates with the eccentric screw assembly;

[0010] The eccentric bolt assembly comprises an eccentric bolt, a connecting screw sleeve, a No. 1 locking nut and a screw sleeve locking nut. The eccentric bolt comprises a bolt head and a bolt shank whose axes are parallel to each other and staggered. The distance between the axis of the bolt head and the axis of the bolt shank is the eccentricity of the bolt. The No. 1 locking nut and the screw sleeve locking nut are both sleeved on the bolt shank.

[0011] The eccentric screw assembly comprises an eccentric screw, a screw adjusting nut and a second locking nut. The eccentric screw comprises a screw head and a screw rod portion whose axes are parallel to each other and staggered. The distance between the axis of the screw head and the axis of the screw rod portion is the eccentricity of the screw. The screw adjusting nut and the second locking nut are both sleeved on the screw rod portion.

[0012] The No. 1 connecting sleeve is threadedly connected to the bolt shank, the No. 2 connecting sleeve is threadedly connected to the screw shank, the connecting screw sleeve is on the bolt shank, and the bolt head and the screw head are matched through the connecting screw sleeve, the No. 1 locking nut is matched with the No. 1 connecting sleeve, the screw sleeve locking nut is matched with the connecting screw sleeve, the screw adjustment nut is matched with the connecting screw sleeve, and the No. 2 locking nut is matched with the No. 2 connecting sleeve. The steel bar connector can realize radial deviation compensation when connecting steel bars through the eccentric bolt assembly and eccentric screw assembly; the No. 1 locking nut can lock the bolt shank with the No. 1 connecting sleeve, and the screw sleeve locking nut can lock the connecting screw sleeve; the screw adjustment nut can adjust the length of the screw shank in the No. 2 connecting sleeve, and the screw head can also be locked with the connecting screw sleeve, and the No. 2 locking nut can lock the screw shank with the No. 2 connecting sleeve.

[0013] Furthermore, the eccentricity of the bolt is equal to the eccentricity of the screw rod.

[0014] Furthermore, the sum of the eccentricity of the bolt and the eccentricity of the screw is the maximum adjustable eccentricity. The radial deviation covers a large range.

[0015] Furthermore, a limit platform is provided on the bolt head, and a limit ring is provided on the connecting screw sleeve, and the limit ring cooperates with the limit platform. The limit platform is in the shape of a truncated cone, annular ring or spherical ball, and is used to match with the limit ring. The shape of the limit platform includes but is not limited to the shapes listed above, and the shape of the limit ring cooperates with the shape of the limit platform, so that the bolt rod can be pulled through the connecting screw sleeve, so that when the connecting screw sleeve is screwed into the screw head, the bolt head can be pulled through the connecting screw sleeve, and the provided limit ring and limit platform can be used to withstand the tensile load.

[0016] Furthermore, the screw rod portion is provided with a nut section, a screw-out section and a connecting section.

[0017] Furthermore, in the initial state, there is an axial gap between the bolt head and the screw head, and the screw-out section>the axial gap. The screw-out section is screwed out to make up the length of the axial gap by the length of the screw-out section, and the length of the connection section is determined by the length of the eccentric screw in the second connection sleeve.

[0018] Furthermore, the No. 1 connecting sleeve is threadedly connected or crimped with the No. 1 steel bar, and the No. 2 connecting sleeve is threadedly connected or crimped with the No. 2 steel bar. If the rear of the No. 1 connecting sleeve and the No. 2 connecting sleeve is made into a blank hole, it can be connected to the No. 1 steel bar and the No. 2 steel bar by buckling and pressing. If it is made into an internal thread, it can be used for connection with the steel bar thread head to achieve the connection between the No. 1 connecting sleeve and the No. 2 connecting sleeve and the No. 1 steel bar and the No. 2 steel bar.

[0019] Furthermore, the bolt rod is threadedly connected to a No. 1 connecting sleeve, the screw rod is threadedly connected to a No. 2 connecting sleeve, the bolt head is located in the connecting screw sleeve, and the connecting screw sleeve is threadedly connected to the screw head.

[0020] Furthermore, another technical purpose of the present invention is to provide a steel bar connecting method with a steel bar connector having a double eccentricity adjustment function.

[0021] The above technical objectives of the present invention are achieved through the following technical solutions.

[0022] A method for connecting steel bars with a steel bar connector having a double eccentricity adjustment function, characterized in that: a method for connecting a No. 1 connecting sleeve and a No. 2 connecting sleeve using a steel bar connector body is as follows:

[0023] (1) Turn the No. 1 locking nut to make the bolt shank in the No. 1 connecting sleeve in an unlocked state, and turn the screw adjusting nut to make the screw shank rotate out of the No. 2 connecting sleeve;

[0024] (2) Turn the eccentric bolt. When the center point of the bolt head coincides with the center point of the screw head, turn the screw adjusting nut until the end face of the screw head approaches the end face of the bolt head. Turn the screw rod and the bolt rod to align them with each other.

[0025] (3) Put the connecting screw sleeve on the screw head, and turn the No. 2 locking nut to lock the screw rod and the No. 2 connecting sleeve, turn the screw adjustment nut in the opposite direction so that there is a distance between the screw adjustment nut and the screw head, and then turn the No. 1 locking nut to lock the bolt rod and the No. 1 connecting sleeve;

[0026] (4) Screw the connecting screw sleeve completely into the screw head so that the limit ring contacts the limit platform, turn the screw sleeve locking nut, lock the screw sleeve locking nut to one end of the connecting screw sleeve, turn the screw adjusting nut, lock the screw adjusting nut to the other end of the connecting screw sleeve, and the connection is completed.

[0027] Furthermore, before connection, the No. 1 connecting sleeve and the No. 2 connecting sleeve are respectively connected to the No. 1 steel bar and the No. 2 steel bar, and the No. 1 steel bar and the No. 2 steel bar are roughly aligned. When the unscrewed section > the axial clearance and the actual eccentricity < the maximum adjustable eccentricity, the No. 1 connecting sleeve and the No. 2 connecting sleeve can be connected through the steel bar connector body.

[0028] Compared with the prior art, the present invention has the following advantages: 1. By using an eccentric bolt and an eccentric screw with the same adjustable eccentricity, when the actual eccentricity of the No. 1 steel bar and the No. 2 steel bar is less than the maximum adjustable eccentricity, the rotation angle of the adjusting bolt rod and / or the screw rod can achieve the concentricity of the bolt head and the screw head, thereby achieving the connection between the No. 1 steel bar and the No. 2 steel bar.

[0029] 2. Since the eccentricity of the bolt is equal to the eccentricity of the screw and both are adjustable eccentricities, a single adjustable eccentricity can provide twice the adjustable eccentricity (i.e. the maximum adjustable eccentricity) of the steel bar radial deviation coverage, which can significantly reduce the size of the connecting screw sleeve and provide a larger steel bar axis eccentricity adjustment.

[0030] 3. A considerable length of the bolt rod and the screw rod are exposed outside the No. 1 connecting sleeve and the No. 2 connecting sleeve. The exposed length has a certain amount of elastic deformation. During assembly, the bolt rod and the screw rod are in a non-locked state to fully utilize the thread clearance of the bolt rod and the screw rod in the No. 1 connecting sleeve and the No. 2 connecting sleeve. Both provide additional floating space for the connecting sleeve to be screwed into the screw head.

[0031] 4. No. 1 connecting sleeve and No. 2 connecting sleeve can be standard sleeves, and the steel bar connector can be used in conjunction with standard sleeves. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The connection process of the steel bar connector of the embodiment of the present invention is shown in FIG. Figure 1 .

[0033] Figure 2 The connection process of the steel bar connector of the embodiment of the present invention is shown in FIG. Figure 2 .

[0034] Figure 3 The connection process of the steel bar connector of the embodiment of the present invention is shown in FIG. Figure 3 .

[0035] Figure 4 The connection process of the steel bar connector of the embodiment of the present invention is shown in FIG. Figure 4 .

[0036] Figure 5 The connection process of the steel bar connector of the embodiment of the present invention is shown in FIG. Figure 5 .

[0037] Figure 6 The eccentric adjustment state structure of the steel bar connector of the embodiment of the present invention is schematically shown. Figure 1 .

[0038] Figure 7 The eccentric adjustment state structure of the steel bar connector of the embodiment of the present invention is schematically shown. Figure 2 .

[0039] Figure 8 The eccentric adjustment state structure of the steel bar connector of the embodiment of the present invention is schematically shown. Figure 3 .

[0040] Fig. 9 The eccentric adjustment state structure of the steel bar connector of the embodiment of the present invention is schematically shown. Figure 4 .

[0041] Fig.10 It is a schematic cross-sectional structure diagram of a steel bar connector according to an embodiment of the present invention.

[0042] Fig.11 It is a schematic diagram of the three-dimensional structure of a steel bar connector according to an embodiment of the present invention.

[0043] In the figure: eccentric bolt assembly 1, eccentric screw assembly 2, No. 1 connecting sleeve 3, No. 2 connecting sleeve 4, No. 1 steel bar 5, No. 2 steel bar 6,

[0044] Eccentric bolt 11, bolt head 12, bolt rod 13, connecting screw sleeve 14, No. 1 locking nut 15, screw sleeve locking nut 16, limit table 17, limit ring 18,

[0045] The center point of the bolt head is 1A, the center point of the bolt shank is 1B,

[0046] Eccentric screw 21, screw head 22, screw rod 23, screw adjustment nut 24, No. 2 locking nut 25,

[0047] The center point of the screw head is 2A, the center point of the screw shaft is 2B,

[0048] Nut section L1, unscrewing section L2, connecting section L3, axial clearance G,

[0049] Bolt eccentricity K1, screw eccentricity K2, adjustment eccentricity K, maximum adjustment eccentricity 2K, actual eccentricity ΔK. DETAILED DESCRIPTION

[0050] The present invention will be further described in detail below with reference to the accompanying drawings and by way of examples. The following examples are intended to explain the present invention but the present invention is not limited to the following examples.

[0051] See also Figures 1 to 11 As shown: the steel bar connector with dual eccentricity adjustment function in this embodiment includes a No. 1 connecting sleeve 3 for connecting with a No. 1 steel bar 5 and a No. 2 connecting sleeve 4 for connecting with a No. 2 steel bar 6. The No. 1 connecting sleeve 3 and the No. 2 connecting sleeve 4 are connected by a steel bar connector body that can compensate for the distance between the axes of the No. 1 steel bar 5 and the No. 2 steel bar 6 during the connection process, which is the actual eccentricity ΔK. The No. 1 connecting sleeve 3 is threaded or crimped with the No. 1 steel bar 5, and the No. 2 connecting sleeve 4 is threaded or crimped with the No. 2 steel bar 6. The actual eccentricity ΔK refers to the distance between the axes of the No. 1 steel bar 5 and the No. 2 steel bar 6 in parallel and radial directions.

[0052] The steel bar connector body in this embodiment includes an eccentric bolt assembly 1 and an eccentric screw assembly 2, a No. 1 connecting sleeve 3 is connected to the eccentric bolt assembly 1, a No. 2 connecting sleeve 4 is connected to the eccentric screw assembly 2, and the eccentric bolt assembly 1 cooperates with the eccentric screw assembly 2.

[0053] The eccentric bolt assembly 1 in this embodiment includes an eccentric bolt 11, a connecting screw sleeve 14, a No. 1 locking nut 15 and a screw sleeve locking nut 16. The eccentric bolt 11 includes a bolt head 12 and a bolt rod 13 whose axes are parallel to each other and staggered. The distance between the two axes is the bolt eccentricity K1.

[0054] The eccentric screw assembly 2 in this embodiment includes an eccentric screw 21, a screw adjustment nut 24 and a No. 2 locking nut 25. One end of the eccentric screw 21 is a screw head 22. The eccentric screw 21 includes a screw head 22 and a screw rod 23 whose axes are parallel to each other and staggered. The distance between the two axes is the screw eccentricity K2.

[0055] The bolt eccentricity K1 and the screw eccentricity K2 in this embodiment are equal and are both adjustable eccentricities K. The sum of the bolt eccentricity K1 and the screw eccentricity K2 is the maximum adjustable eccentricity 2K, that is, the maximum adjustable eccentricity 2K is equal to 2 times the adjustable eccentricity K.

[0056] In this embodiment, a limiting platform 17 is provided on the bolt head 12, and a limiting ring 18 is provided on the connecting screw sleeve 14, and the limiting ring 18 cooperates with the limiting platform 17; the middle part of the limiting ring 18 is a bolt through hole, and the bolt rod 13 passes through the bolt through hole; the limiting ring 18 contacts with the limiting platform 17, and the limiting platform 17 can be truncated cone-shaped, annular or spherical, and is used to adapt to the limiting ring 18. After the connecting screw sleeve 14 is screwed into the screw head 22, the limiting platform 17 can be pressed by the limiting ring 18 to achieve a firm connection.

[0057] In this embodiment, the No. 1 connecting sleeve 3 is threadedly connected to the bolt rod 13, the No. 1 locking nut 15 and the screw sleeve locking nut 16 are both sleeved on the bolt rod 13, the No. 1 locking nut 15 contacts the No. 1 connecting sleeve 3, the screw sleeve locking nut 16 contacts the connecting screw sleeve 14, the No. 2 connecting sleeve 4 is threadedly connected to the screw rod 23, the screw adjusting nut 24 and the No. 2 locking nut 25 are both sleeved on the screw rod 23, the screw adjusting nut 24 contacts the connecting screw sleeve 14, the No. 2 locking nut 25 contacts the No. 2 connecting sleeve 4, the connecting screw sleeve 14 is on the bolt rod 13, and the bolt head 12 and the screw head 22 are matched through the connecting screw sleeve 14, that is, the bolt head 12 is located in the connecting screw sleeve 14, and the connecting screw sleeve 14 is threadedly connected to the screw head 22, and the connecting screw sleeve 14 coincides with the axis of the bolt head 12 and the screw head 22.

[0058] The screw rod portion 23 in this embodiment 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 12 and the screw head 22, and the screw-out section L2 is greater than the axial gap G. The nut section L1 is used to install the screw adjustment nut 24 and the second locking nut 25 in the initial state, the screw-out section L2 is used to make up for the length of the axial gap G, and the connecting section L3 is used to connect the No. 2 connecting sleeve 4. The length of the connecting section L3 is determined by the length of the eccentric screw 21 in the No. 2 connecting sleeve 4, and the length of the axial gap G is determined by the steel bar connector body.

[0059] The "initial state" refers to the state after the eccentric bolt assembly 1 is connected to the No. 1 connecting sleeve 3, and the eccentric screw assembly 2 is connected to the No. 2 connecting sleeve 4, and the main body of the steel bar connector has not been screwed. Figure 1 shown.

[0060] The steel bar connection method of the steel bar connector with double eccentricity adjustment function in this embodiment is as follows:

[0061] Before connection, the No. 1 connecting sleeve 3 and the No. 2 connecting sleeve 4 are respectively connected to the No. 1 steel bar 5 and the No. 2 steel bar 6, and the No. 1 steel bar 5 and the No. 2 steel bar 6 are roughly aligned. When the unscrewed section L2> the axial gap G, and the actual eccentricity ΔK< the maximum adjustable eccentricity 2K, the No. 1 connecting sleeve 3 and the No. 2 connecting sleeve 4 can be connected through the steel bar connector body.

[0062] The method of connecting the No. 1 connecting sleeve 3 and the No. 2 connecting sleeve 4 using the steel bar connector body is as follows:

[0063] (1) Turn the No. 1 locking nut 15 to make the bolt shank 13 in the No. 1 connecting sleeve 3 in an unlocked state (i.e., the bolt shank 13 is rotated in the No. 1 connecting sleeve 3 so that the length of the bolt shank 13 extending out of the No. 1 connecting sleeve 3 can be adjusted), turn the screw adjustment nut 24 to make the screw shank 23 screw out of the No. 2 connecting sleeve 4 (at this time, the screw shank 23 is in an unlocked state in the No. 2 connecting sleeve 4, and when the screw adjustment nut 24 is turned, the screw adjustment nut 24 contacts the screw head 22, such as Figure 1 as shown).

[0064] The eccentric screw 21 and the screw adjustment nut 24 can be an integrated structure (i.e., a structure similar to the screw adjustment nut 24 is directly processed on the eccentric screw 21, which can also facilitate the eccentric screw 21 to be unscrewed), or a separate structure (i.e., the embodiment in this application).

[0065] (2) Turn the eccentric bolt 11 until the center point 1A of the bolt head coincides with the center point 2A of the screw head (usually, the bolt head 12 and the screw head 22 can be aligned by turning the eccentric bolt 11 less than half a turn), turn the screw adjustment nut 24 until the end face of the screw head 22 approaches the end face of the bolt head 12 (such as Figure 2 As shown), rotate the screw shaft 23 and the bolt shaft 13 so that they (the screw head 22 and the bolt head 12) are aligned with each other.

[0066] (3) Sleeve the connecting screw sleeve 14 onto the screw head 22 (i.e., screw the connecting screw sleeve 14 onto the screw head 22 with 2-3 threads), and turn the No. 2 locking nut 25 to lock the screw rod 23 with the No. 2 connecting sleeve 4, and reversely turn the screw adjusting nut 24 so that there is a distance between the screw adjusting nut 24 and the screw head 22, so that the connecting screw sleeve 14 is not interfered by the adjusting nut 24 when the connecting screw sleeve 14 is screwed, and then turn the No. 1 locking nut 15 to lock the bolt rod 13 with the No. 1 connecting sleeve 3 (such as Figure 3 as shown).

[0067] (4) Screw the connecting screw sleeve 14 completely into the screw head 22 so that the limiting ring 18 contacts the limiting platform 17. At this time, the screw head 22 completely enters the connecting screw sleeve 14, and there is a distance between the end of the screw head 22 and the end of the connecting screw sleeve 14 (such as Figure 4 As shown), turn the screw sleeve locking nut 16 to lock the screw sleeve locking nut 16 to one end of the connecting screw sleeve 14, turn the screw adjustment nut 24 to lock the screw adjustment nut 24 to the other end of the connecting screw sleeve 14, and the connection is completed (as shown in FIG. Figure 5 As shown); if the eccentric screw 21 and the screw adjusting nut 24 are an integral structure, when the screw head 22 and the bolt head 12 are butted against each other, locking can be achieved by tightening the connecting screw sleeve 14 and the screw head 22.

[0068] Specifically, when the rib connector is in use, the eccentric bolt 11 is rotated according to the eccentric principle. When the eccentric bolt 11 is rotated, the trajectory of the bolt eccentricity K1 will intersect with the trajectory of the screw eccentricity K2. Generally, within half a circle of rotation, the center point 1A of the bolt head and the center point 2A of the screw head will have an intersection. When the center point 1A of the bolt head coincides with the center point 2A of the screw head, the connecting screw sleeve 14 can be partially screwed into the thread of the screw head 22; usually, the connecting screw sleeve 14 is screwed into 2-3 threads of the screw head 22. At this time, the eccentric bolt assembly 1 and the eccentric screw assembly 2 are respectively locked with the No. 1 connecting sleeve 3 and the No. 2 connecting sleeve 4, and then the connecting screw sleeve 14 is further completely screwed into the thread of the screw head 22 and tightened.

[0069] like Figure 6 As shown, eccentric adjustment state 1: the center point 1A of the bolt head and the center point 2A of the screw head are on the same axis, and at the same time, the center point 1B of the bolt shaft and the center point 2B of the screw shaft are also on the same axis, and the actual eccentricity ΔK is zero.

[0070] like Figure 7 As shown, eccentric adjustment state 2: rotate the bolt rod 13 or the screw rod 23 about 1 / 6 turn to make the bolt head center point 1A and the screw head center point 2A on the same axis. At this time, the actual eccentricity ΔK is 1 times the adjustment eccentricity K.

[0071] like Figure 8 As shown, eccentric adjustment state 3: rotate the bolt rod 13 or the screw rod 23 about 1 / 3 turn to make the bolt head center point 1A and the screw head center point 2A on the same axis. At this time, the actual eccentricity ΔK is 1.732 times the adjustment eccentricity K.

[0072] like Fig. 9 As shown, the eccentric adjustment state 4: at this time, the center point 1A of the bolt head and the center point 2A of the screw head are on the same axis, and the actual eccentricity ΔK is twice the adjustment eccentricity K, that is, the actual eccentricity ΔK is the maximum adjustment eccentricity 2K.

[0073] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the present invention.

Claims

1. A steel bar connector with a dual eccentricity adjustment function, comprising a No. 1 connecting sleeve (3) for connecting to a No. 1 steel bar (5) and a No. 2 connecting sleeve (4) for connecting to a No. 2 steel bar (6), characterized in that: The No. 1 connecting sleeve (3) and the No. 2 connecting sleeve (4) are connected via a steel bar connector body that can compensate for the distance between the axes of the No. 1 steel bar (5) and the No. 2 steel bar (6) during the connection process, which is equal to the actual eccentricity (ΔK); The steel bar connector body comprises an eccentric bolt assembly (1) and an eccentric screw assembly (2); the No. 1 connecting sleeve (3) is connected to the eccentric bolt assembly (1), the No. 2 connecting sleeve (4) is connected to the eccentric screw assembly (2), and the eccentric bolt assembly (1) cooperates with the eccentric screw assembly (2); The eccentric bolt assembly (1) comprises an eccentric bolt (11), a connecting screw sleeve (14), a No. 1 locking nut (15) and a screw sleeve locking nut (16); the eccentric bolt (11) comprises a bolt head (12) and a bolt shank (13) whose axes are parallel to each other and are arranged in a staggered manner; the distance between the axis of the bolt head (12) and the axis of the bolt shank (13) is the bolt eccentricity (K1); the No. 1 locking nut (15) and the screw sleeve locking nut (16) are both sleeved on the bolt shank (13); The eccentric screw assembly (2) comprises an eccentric screw (21), a screw adjustment nut (24) and a second locking nut (25); the eccentric screw (21) comprises a screw head (22) and a screw shaft (23) whose axes are parallel to each other and are arranged in a staggered manner; the distance between the axis of the screw head (22) and the axis of the screw shaft (23) is the screw eccentricity (K2); the screw adjustment nut (24) and the second locking nut (25) are both sleeved on the screw shaft (23); The No. 1 connecting sleeve (3) is threadedly connected to the bolt rod (13), the No. 2 connecting sleeve (4) is threadedly connected to the screw rod (23), the connecting screw sleeve (14) is on the bolt rod (13), and the bolt head (12) and the screw rod head (22) are matched through the connecting screw sleeve (14), the No. 1 locking nut (15) is matched with the No. 1 connecting sleeve (3), the screw sleeve locking nut (16) is matched with the connecting screw sleeve (14), the screw rod adjusting nut (24) is matched with the connecting screw sleeve (14), and the No. 2 locking nut (25) is matched with the No. 2 connecting sleeve (4).

2. The steel bar connector with double eccentricity adjustment function according to claim 1, characterized in that: The bolt eccentricity (K1) is equal to the screw rod eccentricity (K2).

3. The steel bar connector with double eccentricity adjustment function according to claim 1, characterized in that: The sum of the bolt eccentricity (K1) and the screw eccentricity (K2) is the maximum adjustable eccentricity (2K).

4. The steel bar connector with double eccentricity adjustment function according to claim 1, characterized in that: A limiting platform (17) is provided on the bolt head (12), a limiting ring (18) is provided on the connecting screw sleeve (14), and the limiting ring (18) cooperates with the limiting platform (17).

5. The steel bar connector with double eccentricity adjustment function according to claim 1, characterized in that: The screw rod portion (23) is provided with a nut section (L1), a screw-out section (L2) and a connecting section (L3).

6. The steel bar connector with double eccentricity adjustment function according to claim 5, characterized in that: In the initial state, an axial gap (G) exists between the bolt head (12) and the screw rod head (22), and the screw-out section (L2) is greater than the axial gap (G).

7. The steel bar connector with double eccentricity adjustment function according to claim 1, characterized in that: The No. 1 connecting sleeve (3) is threadedly connected or crimped to the No. 1 steel bar (5), and the No. 2 connecting sleeve (4) is threadedly connected or crimped to the No. 2 steel bar (6).

8. The steel bar connector with double eccentricity adjustment function according to claim 1, characterized in that: The bolt head (12) is located in the connecting screw sleeve (14), and the connecting screw sleeve (14) is threadedly connected to the screw rod head (22).

9. A method for connecting steel bars using a steel bar connector with a double eccentricity adjustment function according to any one of claims 1 to 8, characterized in that: The method of connecting the No. 1 connecting sleeve (3) and the No. 2 connecting sleeve (4) using the steel bar connector body is as follows: (1) Turn the No. 1 locking nut (15) to place the bolt shank (13) in the No. 1 connecting sleeve (3) in an unlocked state, and turn the screw rod adjusting nut (24) to screw the screw rod (23) out of the No. 2 connecting sleeve (4); (2) Rotate the eccentric bolt (11) until the center point (1A) of the bolt head coincides with the center point (2A) of the screw head, rotate the screw adjusting nut (24) until the end surface of the screw head (22) approaches the end surface of the bolt head (12), and rotate the screw rod (23) and the bolt rod (13) so that they are aligned with each other; (3) Sleeve the connecting screw sleeve (14) onto the screw head (22), rotate the No. 2 locking nut (25) to lock the screw rod (23) and the No. 2 connecting sleeve (4), rotate the screw adjusting nut (24) in the opposite direction so that there is a distance between the screw adjusting nut (24) and the screw head (22), and then rotate the No. 1 locking nut (15) to lock the bolt rod (13) and the No. 1 connecting sleeve (3); (4) Screw the connecting screw sleeve (14) completely into the screw head (22) so that the limiting ring (18) contacts the limiting platform (17), rotate the screw sleeve locking nut (16), lock the screw sleeve locking nut (16) to one end of the connecting screw sleeve (14), rotate the screw adjustment nut (24), lock the screw adjustment nut (24) to the other end of the connecting screw sleeve (14), and the connection is completed.

10. The method for connecting steel bars using a steel bar connector with a double eccentricity adjustment function according to claim 9, characterized in that: Before connection, the No. 1 connection sleeve (3) and the No. 2 connection sleeve (4) are respectively connected to the No. 1 steel bar (5) and the No. 2 steel bar (6), and the No. 1 steel bar (5) and the No. 2 steel bar (6) are roughly aligned. When the unscrewed section (L2) is greater than the axial gap (G) and the actual eccentricity (ΔK) is less than the maximum adjustable eccentricity (2K), the No. 1 connection sleeve (3) and the No. 2 connection sleeve (4) can be connected through the steel bar connector body.

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