Adjustable easy centering sleeve for modular connection of reinforcing bars

Abstract

The utility model provides a kind of adjustable easy centring sleeve for steel bar modularization connection, including threaded sleeve, upper connecting sleeve and lower connecting sleeve;The upper inner cavity of threaded sleeve is equipped with the first internal thread connected with the upper silk head of upper steel bar, the outer wall of lower part is equipped with the first external thread, and the inside of bottom end is equipped with centering jack plug;The upper portion of lower connecting sleeve is sequentially equipped with centering plug, shaft shoulder and main shaft from top to bottom along axial direction, and the outer diameter of shaft shoulder is greater than the outer diameter of centering plug and main shaft;The lower inner cavity of lower connecting sleeve is equipped with the second internal thread connected with the lower silk head of lower steel bar;Upper connecting sleeve is axially slidably sleeved on the main shaft, and the upper inner cavity of upper connecting sleeve is equipped with the third internal thread connected with the first external thread, and the inside of bottom end of upper connecting sleeve is equipped with annular abutting block, and the inner diameter of abutting block is greater than the outer diameter of main shaft and less than the outer diameter of shaft shoulder.The utility model can solve the problems of steel bar spacing deviation and eccentricity simultaneously, and meet the needs of construction scene.

Description

Technical Field

[0001] This utility model relates to the field of steel bar connection technology in building construction, specifically to a sleeve suitable for quick center-alignment connection of modular steel bar components. Background Technology

[0002] With the rapid development of nuclear power construction in my country, the prefabrication and modularization of steel reinforcement components have gradually become a trend in order to improve construction speed and meet project schedule requirements. As steel reinforcement components are widely used, the quality and efficiency of connections between them have become crucial aspects of construction.

[0003] In the connection between the upper and lower reinforcing bars in two reinforcing bar components, the limitations of traditional straight threaded sleeves gradually become apparent: (i) Spacing deviation problem: During the installation of precast reinforcing bar components, the spacing between the corresponding upper and lower reinforcing bars in each group is often inconsistent due to construction errors, resulting in a certain range of spacing deviation. Traditional straight threaded sleeves cannot adjust the length to accommodate this spacing deviation; (ii) Misalignment problem: There is often a certain range of centering deviation between the upper and lower corresponding reinforcing bars, and traditional straight threaded sleeves do not have the function of correcting misalignment and centering, relying on manual correction, which is very inefficient.

[0004] The two factors mentioned above have placed new demands on the connecting sleeves used for connecting steel reinforcement components. Therefore, there is an urgent need for a new type of sleeve that combines spacing adjustment and alignment correction functions. Utility Model Content

[0005] The purpose of this invention is to provide an adjustable, easily aligned, heart-shaped sleeve for modular rebar connection, so as to simultaneously solve the problems of rebar spacing and centering deviation in the connection of upper and lower rebar components.

[0006] To solve the above-mentioned technical problems, the present invention includes:

[0007] An adjustable, easily aligning sleeve for modular rebar connection is used to connect corresponding upper and lower rebars in two rebar components. It includes a threaded sleeve, an upper connecting sleeve, and a lower connecting sleeve. The threaded sleeve has a first internal thread in its upper inner cavity that connects to the upper thread of the upper rebar, a first external thread on its lower outer wall, and a centering insertion hole at its bottom. The centering insertion hole has a chamfered opening. The upper part of the lower connecting sleeve has a centering plug, a shoulder, and a main shaft arranged axially from top to bottom along the axial direction. The centering plug has a clearance fit with the centering hole, and the outer diameter of the shoulder is larger than the outer diameter of the centering plug and the main shaft. The top of the centering plug is provided with a shaft end chamfer, and the lower inner cavity of the lower connecting sleeve is provided with a second internal thread that connects to the lower thread of the lower reinforcing bar. The upper connecting sleeve is axially slidably sleeved on the main shaft, and the upper inner cavity of the upper connecting sleeve is provided with a third internal thread that connects to the first external thread. The bottom end of the upper connecting sleeve is provided with an annular pressing block, and the inner diameter of the pressing block is larger than the outer diameter of the main shaft and smaller than the outer diameter of the shoulder.

[0008] Furthermore, the diameter of the centering jack is smaller than the outer diameter of the upper wire tip.

[0009] Furthermore, the taper of the chamfer at the orifice is the same as that of the chamfer at the shaft end.

[0010] Furthermore, the length of the centering socket is equal to or close to the length of the centering plug.

[0011] Furthermore, a relief groove is provided in the inner cavity of the upper connecting sleeve and between the third internal thread and the pressing block, and the width of the relief groove is equal to the thickness of the shoulder.

[0012] Furthermore, it also includes a lock nut, which is threaded to the bottom end of the lower threaded end and abuts against the lower end face of the lower connecting sleeve to lock the sleeve.

[0013] Furthermore, the length of the first internal thread is equal to the length of the upper thread, and the sum of the lengths of the second internal thread and the lock nut is equal to the length of the lower thread.

[0014] The beneficial effects of this utility model are:

[0015] This invention integrates spacing adjustment and alignment correction functions into one unit, making it particularly suitable for connecting upper and lower reinforcing bars. The alignment insertion hole of the threaded sleeve connected to the upper thread of the upper reinforcing bar and the alignment plug of the lower connecting sleeve connected to the lower thread of the lower reinforcing bar form a insertion hole-plug guide structure. The orifice of the alignment insertion hole has a chamfer, and the top of the alignment plug has a chamfered shaft end. Through this guide structure, when the lower connecting sleeve is rotated towards the threaded sleeve using a wrench or other tools, the alignment plug automatically inserts into the alignment insertion hole, effectively achieving rapid alignment correction between the upper and lower reinforcing bars without manual correction. Simultaneously, the movement of the lower connecting sleeve towards the threaded sleeve solves the spacing deviation problem between the upper and lower reinforcing bars. After the alignment plug abuts against the upper thread and / or the shaft shoulder abuts against the threaded sleeve, the upper connecting sleeve, which can be axially slidably fitted onto the main shaft of the lower connecting sleeve, is threaded onto the threaded sleeve until the pressing block of the upper connecting sleeve abuts against the shaft shoulder of the lower connecting sleeve, ultimately achieving a rigid connection between the upper and lower reinforcing bars. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a rebar joint using this utility model;

[0017] Figure 2 This is a schematic diagram of the threaded sleeve structure;

[0018] Figure 3 This is a schematic diagram of the upper connecting sleeve;

[0019] Figure 4 This is a structural schematic diagram of the lower connecting sleeve;

[0020] In the diagram: 10. Upper reinforcing bar, 11. Upper thread, 12. Threaded sleeve, 121. First internal thread, 122. First external thread, 123. Centering insertion hole, 124. Hole chamfer, 13. Upper connecting sleeve, 131. Pressing block, 132. Third internal thread, 133. Relief groove, 20. Lower reinforcing bar, 21. Lower thread, 22. Lock nut, 23. Lower connecting sleeve, 231. Centering plug, 232. Shoulder, 233. Main spindle, 234. Second internal thread, 235. Shaft end chamfer. Detailed Implementation

[0021] To facilitate understanding of this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. Those skilled in the art should understand that the described embodiments are merely illustrative and should not be construed as limiting the scope of this utility model.

[0022] like Figure 1-4As shown, this utility model provides an adjustable, easy-aligning sleeve for modular connection of reinforcing bars, including a threaded sleeve 12, an upper connecting sleeve 13, and a lower connecting sleeve 23. The upper inner cavity of the threaded sleeve 12 is provided with a first internal thread 121 that connects to the upper thread 11 of the upper reinforcing bar 10, and the lower outer wall is provided with a first external thread 122, and the bottom end is provided with a centering insertion hole 123. The upper part of the lower connecting sleeve 23 is provided with a centering plug 231, a shoulder 232, and a main shaft 233 in sequence from top to bottom along the axial direction. The centering plug 231 is clearance-fitted with the centering insertion hole 123, and the outer diameter of the shoulder 232 is larger than that of the centering plug 231 and the main shaft 233. The outer diameter of the spindle 233; the orifice of the centering insertion hole 123 is provided with an orifice chamfer 124, the top of the centering plug 231 is provided with a shaft end chamfer 235, the lower inner cavity of the lower connecting sleeve 23 is provided with a second internal thread 234 that connects to the lower thread 21 of the lower reinforcing bar 20; the upper connecting sleeve 13 is axially slidably sleeved on the spindle 233, the upper inner cavity of the upper connecting sleeve 13 is provided with a third internal thread 132 that connects to the first external thread 122, and the bottom end of the upper connecting sleeve 13 is provided with an annular pressing block 131, the inner diameter of the pressing block 131 is larger than the outer diameter of the spindle 233 and smaller than the outer diameter of the shoulder 232.

[0023] This utility model is used to connect upper reinforcing bars 10 and lower reinforcing bars 20 in two reinforcing bar components. The upper reinforcing bar 10 has an upper threaded end 11 at its end, and the lower reinforcing bar 20 has a lower threaded end 21 at its end. During the connection process, the threaded sleeve 12 is threaded onto the upper threaded end 11 and remains stationary. The lower connecting sleeve 23 must first be fully connected to the lower threaded end 21, and then a wrench or other tool is used to rotate the lower connecting sleeve 23 to move it toward the threaded sleeve 12. Therefore, the upper threaded end 11 is usually set as a standard threaded end, while the lower threaded end 21 is set as an extended threaded end that is longer than the standard threaded end. The specific length of the extended threaded end is determined according to the set adjustable range. For example, if a certain working condition requires an adjustable range of 30mm, then the length of the extended threaded end is the standard threaded end length increased by 30mm.

[0024] During the movement of the lower connecting sleeve 23 toward the threaded sleeve 12, the chamfer 235 at the shaft end of the centering plug 231 and the chamfer 124 at the opening of the centering insertion hole 123 cooperate to allow the centering plug 231 to smoothly enter the centering insertion hole 123 without manual correction. When the centering plug 231 abuts against the upper threaded end 11 and / or the shaft shoulder 232 abuts against the threaded sleeve 12, it indicates that the spacing adjustment and centering correction are completed. Then, the upper connecting sleeve 13 moves upward and its threads engage with the threaded sleeve 12 until the pressing block 131 abuts against the shaft shoulder 232, thus achieving a rigid connection between the upper and lower reinforcing bars.

[0025] This utility model also includes a lock nut 22, which is threaded to the bottom end of the lower threaded end 21 and abuts against the lower end face of the lower connecting sleeve 23 to lock the sleeve. The length of the first internal thread 121 is equal to or slightly less than the length of the upper threaded end 11, and the sum of the lengths of the second internal thread 234 and the lock nut 22 is equal to or slightly less than the length of the lower threaded end 21.

[0026] The diameter of the centering insertion hole 123 is smaller than the outer diameter of the upper thread 11, that is, the inner cavity of the threaded sleeve 12 is a stepped cylinder with a thicker upper part and a thinner lower part. When the threaded sleeve 12 is threaded onto the upper thread 11, the threaded sleeve 12 is installed in place when the upper peripheral end face of the centering insertion hole 123 abuts against the lower end face of the upper thread 11.

[0027] The taper of the chamfer 124 at the orifice is the same as that of the chamfer 235 at the shaft end. By matching the chamfer of the centering plug 231 with the centering hole 123, the insertion resistance of the centering plug 231 can be reduced, making it easier to center and correct the rebar.

[0028] Normally, when the centering plug 231 is inserted into the centering socket 123, the gap between the two on one side is 1mm; the outer diameter of the shoulder 232 is 8-10mm larger than the outer diameter of the centering plug 231 or the spindle 233.

[0029] The length of the centering socket 123 is equal to or close to the length of the centering plug 231. When the length of the centering socket 123 is equal to the length of the centering plug 231, the centering plug 231 can abut against the threaded end 11, while the shoulder 232 abuts against the threaded sleeve 12; when the length of the centering socket 123 is slightly greater than the length of the centering plug 231, only the shoulder 232 abuts against the threaded sleeve 12; when the length of the centering socket 123 is slightly less than the length of the centering plug 231, only the centering plug 231 abuts against the threaded end 11.

[0030] An anti-cutting groove 133 is provided in the inner cavity of the upper connecting sleeve 13, between the third internal thread 132 and the pressing block 131. The width of the anti-cutting groove 133 is greater than the pitch of the third internal thread 132, and the width of the anti-cutting groove 133 is equal to the thickness of the shoulder 232. The diameter of the anti-cutting groove 133 is greater than the diameter of the shoulder 232. The anti-cutting groove 133 ensures that the upper connecting sleeve 13 can perform an anti-cutting operation when machining the third internal thread 132. In addition, since there is no residual thread in the anti-cutting groove 133, it helps to complete the locking connection of the upper and lower reinforcing bars by rotating the upper connecting sleeve 13 and the threaded sleeve 12 after alignment and correction.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable, easily alignable, heart-shaped sleeve for modular rebar connection, used to connect corresponding upper rebar (10) and lower rebar (20) in two rebar components; characterized in that, It includes a threaded sleeve (12), an upper connecting sleeve (13), and a lower connecting sleeve (23); The upper inner cavity of the threaded sleeve (12) is provided with a first internal thread (121) that connects to the upper thread (11) of the upper steel bar (10), the lower outer wall is provided with a first external thread (122), and the center of the bottom end is provided with a centering insertion hole (123); the opening of the centering insertion hole (123) is provided with a chamfer (124). The upper part of the lower connecting sleeve (23) is provided with a centering plug (231), a shoulder (232) and a main shaft (233) in sequence from top to bottom along the axial direction. The centering plug (231) is clearance-fitted with the centering insertion hole (123). The outer diameter of the shoulder (232) is larger than the outer diameter of the centering plug (231) and the main shaft (233). The top of the centering plug (231) is provided with a shaft end chamfer (235). The lower inner cavity of the lower connecting sleeve (23) is provided with a second internal thread (234) that connects to the lower thread (21) of the lower steel bar (20). The upper connecting sleeve (13) is axially slidably sleeved on the main shaft (233); the upper inner cavity of the upper connecting sleeve (13) is provided with a third internal thread (132) that is connected to the first external thread (122); the bottom end of the upper connecting sleeve (13) is provided with an annular pressing block (131); the inner diameter of the pressing block (131) is larger than the outer diameter of the main shaft (233) and smaller than the outer diameter of the shoulder (232).

2. The adjustable, easily alignable heart-shaped sleeve for modular rebar connection according to claim 1, characterized in that, The diameter of the centering jack (123) is smaller than the outer diameter of the upper thread (11).

3. The adjustable, easily alignable heart-shaped sleeve for modular steel bar connection according to claim 1, characterized in that: The taper of the orifice chamfer (124) is the same as that of the shaft end chamfer (235).

4. The adjustable, easily alignable heart-shaped sleeve for modular steel bar connection according to claim 1, characterized in that: The length of the centering socket (123) is equal to or close to the length of the centering plug (231).

5. The adjustable, easily alignable heart-shaped sleeve for modular steel bar connection according to claim 1, characterized in that: A tool relief groove (133) is provided in the inner cavity of the upper connecting sleeve (13) and between the third internal thread (132) and the pressing block (131); the width of the tool relief groove (133) is equal to the thickness of the shoulder (232).

6. The adjustable, easily alignable heart-shaped sleeve for modular steel bar connection according to claim 1, characterized in that: It also includes a lock nut (22), which is threaded to the bottom end of the lower threaded end (21) and abuts against the lower end face of the lower connecting sleeve (23) to lock the sleeve.

7. The adjustable, easily alignable heart-shaped sleeve for modular steel bar connection according to claim 6, characterized in that: The length of the first internal thread (121) is equal to the length of the upper thread (11), and the sum of the lengths of the second internal thread (234) and the lock nut (22) is equal to the length of the lower thread (21).

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