Adjustable grouting sleeve suitable for steel bar offset connection

Abstract

The invention discloses an adjustable grouting sleeve suitable for steel bar offset connection. The sleeve device mainly comprises a sleeve upper half part, a sleeve lower half part, a staggered telescopic device group, a bolt with a cavity, a bolt with a slender rod, an upper connecting steel bar, a lower connecting steel bar and the like. And the staggered telescopic device group is fixedly connected with the upper half part of the sleeve and the lower half part of the sleeve through the cavity-containing bolt and the slender rod-containing bolt. The device is suitable for the situation that two reinforcing steel bars needing to be connected are biased in position, the upper connecting reinforcing steel bar is inserted into the upper half portion of the sleeve by adjusting the telescopic length of the staggered telescopic device set, and the lower connecting reinforcing steel bar is inserted into the lower half portion of the sleeve by adjusting the telescopic length of the staggered telescopic device set. The device has the advantages that the device is suitable for connection of the steel bars under different offset degrees, the offset size of the steel bars does not need to be temporarily measured on site, and connection of the offset steel bars can be achieved only by simply adjusting the dislocation telescopic device set; in addition, the method is also suitable for connection of two steel bars which are not biased.

Description

Technical Field

[0001] The present invention belongs to the technical field of steel bar connection at structural joints in prefabricated building engineering, and particularly relates to an adjustable grouting sleeve suitable for offset connection of steel bars. Background Art

[0002] In recent years, China has continuously achieved prefabrication in the fields of building structures and bridge structures. The proportion of prefabricated buildings and prefabricated bridges in newly built buildings and newly built bridges has been increasing year by year. The commonly used steel bar connection technology for prefabricated structural joints is sleeve grouting connection. That is, the steel bars of the lower structural member and the steel bars of the upper structural member jointly extend into the grouting sleeve at the joint to achieve the transfer of loads.

[0003] However, due to certain deviations in the dimensions of structural members and the positions of extended steel bars during the prefabrication process, when the offset misalignment dimension between the steel bars of the upper structural member and the steel bars of the lower structural member, which are originally designed to be on the same central axis, is very large, it will cause the two to be unable to extend into the designed same grouting sleeve at the same time.

[0004] Whether the joint steel bars are effectively and reliably connected determines the quality of the mechanical properties of prefabricated building structures and prefabricated bridges. When the connecting steel bars of the upper and lower members cannot normally extend into the previous grouting sleeve, the constructor bends the steel bars forcefully to extend them into the sleeve. Moreover, when the offset misalignment dimension between the upper and lower connecting steel bars is too large, even if they are bent and inserted, it is difficult to ensure an effective anchorage length; sometimes, the misaligned steel bars are even directly cut off for subsequent construction. Bending the steel bars will cause stress concentration at the bending point during stress, and it will also cause uneven stress at the joint, increasing the risk of joint failure. And if the connecting steel bars are not connected, although the internal connection situation cannot be observed through the building outer surface after the joint is poured with concrete, it will significantly increase the poor mechanical properties of the joint and the overall structure, and even the insecurity of collapse failure.

[0005] Currently, some devices for solving the problem of steel bar offset have been disclosed in domestic patents. For example, Patent CN105781019B discloses a full grouting sleeve and grouting method for steel bar connection in prefabricated buildings. This device is provided with a first frustum and a second frustum. The two frustums have a set eccentricity and are connected by an intermediate disc. Threads are provided at the other ends of the two frustums to connect with the sleeves on both sides respectively. This device is suitable for the engineering background of steel bar offset. However, different models of parts of the first frustum, the second frustum, and the intermediate disc of this device need to be produced to match the connecting steel bars with different eccentricities at the construction site. After measuring the eccentricity of each group of steel bars, the frustum and the intermediate disc with the corresponding eccentric size are selected for installation and connection. Therefore, this device needs to produce different models of parts according to different eccentricities, increasing costs and inventory difficulties.

[0006] In addition, domestic patent CN114382232B discloses a grouting sleeve and a construction process for the grouting sleeve. The connecting device includes two fixing rings and two connecting balls. The two fixing rings are arranged on the two grouting sleeve bodies and are each provided with a spherical rotation hole. The two connecting balls are rotatably arranged on the rotation hole and are connected together by a connecting mechanism and are provided with a connecting hole connecting the interior of the two grouting sleeve bodies. The device is suitable for engineering backgrounds with offset steel bars. However, the device requires more and more complex components for secondary installation on site; the device also requires a specific vacuum grouting instrument; the connecting ball components are more likely to rotate, resulting in weak shear and tensile strength of the node.

[0007] According to CNKI search results, previous patents have proposed promising devices for addressing rebar offset. However, these patents also have areas for improvement. For example, they fail to eliminate the need for on-site measurement of rebar eccentricity, minimize the number of parts requiring secondary on-site installation, and ensure that the devices meet the joint's load-bearing capacity and stiffness requirements. To address these various influencing factors, an adjustable grouting sleeve suitable for offset rebar connections is proposed. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide an adjustable grouting sleeve suitable for offset connection of steel bars. The device is mainly used to solve the following problems: due to dimensional errors and position deviations of protruding steel bars during the prefabrication process of prefabricated building and bridge structural components, the steel bars of the upper and lower structural components originally designed to be on the same central axis are offset and misaligned, and cannot be inserted into the same grouting sleeve at the same time; the device can avoid the following shortcomings in the existing technology: the need to produce different models of parts according to different eccentricities, which increases manufacturing costs and inventory management difficulties; the need to install a large number of parts on site for secondary installation, which increases construction complexity; the need to accurately measure the eccentricity of the steel bars on site, which increases construction processes; the connection structure is complex and prone to rotation, which affects the stress performance of the node; the present invention can achieve the following advantages through innovative design: the device is prefabricated as a whole, and no secondary installation of parts is required on site; only simple adjustment of the bolts is required to achieve the alignment of the sleeves at both ends of the device with the offset steel bars; no on-site measurement of the steel bar eccentricity is required, and adjustment can be made by visual observation; it is also suitable for working conditions with good steel bar offset and alignment; the bearing capacity and stiffness requirements are guaranteed by fixed rib steps, bolts and hinge design; compared with ordinary grouting sleeves, only a small amount of steel is used for parts, and the cost is low.

[0009] The present invention provides an adjustable grouting sleeve suitable for offset connection of steel bars, including the upper half of the sleeve, the splicing part (upper sleeve), the fixed rib step (upper sleeve), the grouting port (upper sleeve), the slurry outlet (upper sleeve), the sealing layer (upper sleeve), the ring rib (upper sleeve), the connection bolt hole (upper sleeve), the lower half of the sleeve, the splicing part (lower sleeve), the fixed rib step (lower sleeve), the grouting port (lower sleeve), the slurry outlet (lower sleeve), the sealing layer (lower sleeve), the ring rib (lower sleeve), the connection bolt hole (lower sleeve), the bolt with cavity, the non-threaded area at the end (short), the middle threaded area, the non-threaded area at the end (long), the bolt cavity, the internal thread of the cavity wall, the bolt with thin rod, the flat area at the end, the threaded area at the end, the thin rod bolt part, the upper connecting steel bar, the lower connecting steel bar, the dislocation expansion device group, the stress plate, the straight notch, the round notch, the fixing bolt hole, the thread of the fixing bolt hole, the hinge, the short bolt, and the long bolt.

[0010] The upper half of the sleeve includes the splicing part (upper sleeve), the fixed rib step (upper sleeve), the grouting port (upper sleeve), the slurry outlet (upper sleeve), the sealing layer (upper sleeve), the ring rib (upper sleeve), and the connection bolt hole (upper sleeve).

[0011] Further, the cross-sectional shape of the splicing part (upper sleeve) is semi-circular, and the cross-sectional diameter is the same as that of the upper half of the sleeve.

[0012] Further, there are 2 fixed rib steps (upper sleeve) provided on the inner wall of the splicing part (upper sleeve).

[0013] Further, the net distance between the 2 fixed rib steps (upper sleeve) is the same as the maximum length of the stress plate size to install and fix the stress plate.

[0014] Further, the sealing layer (upper sleeve) is located on the lower side of the grouting port (upper sleeve) to prevent the grouted slurry from leaking out from the middle of the overall device.

[0015] Further, the connection bolt hole (upper sleeve) is opened on the splicing part (upper sleeve) and is located in the area between the 2 fixed rib steps (upper sleeve).

[0016] The lower half of the sleeve includes the splicing part (lower sleeve), the fixed rib step (lower sleeve), the grouting port (lower sleeve), the slurry outlet (lower sleeve), the sealing layer (lower sleeve), the ring rib (lower sleeve), and the connection bolt hole (lower sleeve).

[0017] Further, the cross-sectional shape of the splicing part (lower sleeve) is semi-circular, and the cross-sectional diameter is the same as the lower half of the sleeve.

[0018] Further, there are 2 fixing rib steps (lower sleeve) provided on the inner wall of the splicing part (lower sleeve).

[0019] Further, the clear distance between the 2 fixing rib steps (lower sleeve) is the same as the maximum length of the stress plate size to install and fix the stress plate.

[0020] Further, the closing layer (lower sleeve) is located on the upper side of the slurry outlet (lower sleeve) to prevent the poured slurry from leaking out from the middle of the overall device.

[0021] Further, the connecting bolt holes (lower sleeve) are opened on the splicing part (lower sleeve) and are located in the area between the 2 fixing rib steps (lower sleeve).

[0022] Further, the splicing part (lower sleeve) and the splicing part (upper sleeve) can be jointly assembled into one with the same radius dimension and cross-sectional shape as the lower half or the upper half of the sleeve.

[0023] The cavity-containing bolt includes the end non-threaded area (short), the middle threaded area, the end non-threaded area (long), the bolt cavity, and the inner wall thread of the cavity.

[0024] Further, the diameter of the end non-threaded area (short) is the same as the aperture diameters of the connecting bolt holes (upper sleeve) and the connecting bolt holes (lower sleeve).

[0025] Further, the thread parameters of the middle threaded area are matched with the thread parameters of the fixing bolt hole thread on the inner wall of the fixing bolt hole so that the middle threaded area can be screwed into the fixing bolt hole thread.

[0026] Further, the diameter of the end non-threaded area (long) can be slightly smaller than the diameter of the end non-threaded area (short) to facilitate the installation of the cavity-containing bolt.

[0027] Further, the inner wall of the bolt cavity is provided with the inner wall thread of the cavity.

[0028] Further, the thread parameters of the inner wall thread of the cavity are matched with the thread parameters of the thin rod bolt part of the thin-rod bolt so that the thin rod bolt part can be screwed into the inner wall thread of the cavity.

[0029] The thin-rod bolt includes the end flat area, the end threaded area, and the thin rod bolt part.

[0030] Further, the diameter of the end flat area is the same as the hole diameters of the connecting bolt hole (upper sleeve) and the connecting bolt hole (lower sleeve).

[0031] Further, the thread parameters of the end thread area match the thread parameters of the fixing bolt hole thread on the inner wall of the fixing bolt hole, enabling it to be screwed in.

[0032] Further, the diameter of the thin rod bolt part is smaller than the diameter of the end thread area.

[0033] Further, the thread parameters of the thin rod bolt part match the thread parameters of the inner wall thread of the cavity, enabling the thin rod bolt part to be screwed into the inner wall thread of the cavity.

[0034] The dislocation telescopic device group includes the force-bearing plate, the hinge, the short bolt, and the long bolt.

[0035] Further, the force-bearing plate includes the straight notch, the round notch, the fixing bolt hole, and the fixing bolt hole thread.

[0036] Further, the straight notch penetrates through the force-bearing plate, and the long bolt can be accommodated and installed inside it.

[0037] Further, the round notch penetrates through the force-bearing plate, and the diameter of the round notch is not less than the diameter of the long bolt, enabling the long bolt to be accommodated and installed inside it.

[0038] Further, the hole directions of the round notch and the straight notch are parallel.

[0039] Further, the fixing bolt hole penetrates through the force-bearing plate, and the inner wall of the fixing bolt hole is provided with the fixing bolt hole thread.

[0040] Further, the thread parameters of the fixing bolt hole thread match the thread parameters of the middle thread area and the thread parameters of the end thread area, enabling both the middle thread area and the end thread area to be screwed into the fixing bolt hole thread.

[0041] Further, the curvature of the curved surface of the force-bearing plate along the length direction is the same as the curvature of the inner wall curved surface of the splicing part (upper sleeve) or the splicing part (lower sleeve), and the two can be fitted together after installation.

[0042] Further, the hole direction of the fixing bolt hole is perpendicular to the hole directions of the straight notch and the round notch.

[0043] Further, the hinge is assembled with the force-bearing plate through the long bolt.

[0044] Furthermore, the hinges are connected by the short bolts.

[0045] Furthermore, the diameters of the circular through-holes at both ends of the hinge are the same as the diameter of the long bolt.

[0046] Furthermore, the diameter of the circular through-hole in the middle of the hinge is the same as the diameter of the short bolt.

[0047] Furthermore, the offset telescoping device group includes at least 2 of the force-bearing plates, 4 of the hinges, 2 of the short bolts, and 4 of the long bolts.

[0048] Preferably, the offset telescoping device group includes 2 of the force-bearing plates, 8 of the hinges, 8 of the short bolts, and 4 of the long bolts.

[0049] The elongation length of the offset telescoping device group exceeds the diameter of the grouting area of the upper half and the lower half of the sleeve.

[0050] The minimum length of the offset telescoping device group when shortened is less than the inner diameter of the grouting area of the upper half and the lower half of the sleeve, and after folding, it can satisfy the fitting of the fitting part (upper sleeve) and the fitting part (lower sleeve).

[0051] The offset telescoping device group is installed and connected to the upper half and the lower half of the sleeve through the cavity-containing bolt and the thin-rod-containing bolt.

[0052] The offset telescoping device group adjusts the relative positions of the upper half and the lower half of the sleeve by adjusting its telescoping length.

[0053] The fitting part (upper sleeve) can be assembled in contact with the fitting part (lower sleeve), so that the central axes of the upper half and the lower half of the sleeve coincide, making the whole device similar to a common full-grouting sleeve in appearance.

[0054] Compared with the prior art, the beneficial effects brought by the present invention are:

[0055] 1. The adjustable grouting sleeve device is used for connecting offset misaligned steel bars at the joints of prefabricated buildings and prefabricated bridge structures, which can avoid the unconventional construction method of forcibly bending the misaligned steel bars and inserting them into the sleeve during construction, and avoid the phenomena of steel bar stress concentration and uneven joint stress; it can prevent the joint steel bars from being cut off due to inability to be inserted into the sleeve, and avoid the poor force of the structural joints and the overall structure and even the insecurity of collapse and damage caused thereby.

[0056] 2. When used on-site, the adjustable grouting sleeve device can be formed in one step, avoiding construction errors caused by secondary installation procedures and cross operations.

[0057] 3. For connecting steel bars with a certain fixed diameter, the misalignment telescopic device group in the adjustable grouting sleeve device does not need to produce components of different sizes and models, thus reducing the manufacturing cost and simplifying the on-site operation procedures.

[0058] 4. When constructing on-site, the adjustable grouting sleeve device does not need to measure the misalignment offset size between two connecting steel bars. Just by the naked eye, the bolts in the middle area of the device can be adjusted to align the sleeves at both ends of the device with the corresponding connecting steel bars.

[0059] 5. The adjustable grouting sleeve device meets the requirements in terms of bearing capacity and stiffness. The fixed rib steps (upper sleeve), fixed rib steps (lower sleeve), cavity-containing bolts, thin-rod-containing bolts, and the staggered hinge design in the misalignment telescopic device group in the adjustable grouting sleeve device jointly bear the shear force caused by the load on the connecting steel bars. Moreover, the thread fit between the force-bearing plate and the cavity-containing bolts and thin-rod-containing bolts can ensure the stiffness requirement of the middle part of the device in the direction perpendicular to the overall axis of the device, so as to avoid the phenomenon that the misalignment telescopic device group expands and contracts randomly during installation and use.

[0060] 6. Compared with ordinary full grouting sleeves, the adjustable grouting sleeve device has additional components such as bolts, hinges, and force-bearing plates. The additional components do not use much steel and have low costs.

[0061] 7. The adjustable grouting sleeve device is applicable to both the working conditions of offset connection of steel bars and the working conditions where the steel bars are well-centered and have almost no misalignment. When the cavity-containing bolts and thin-rod-containing bolts in the middle are tightened, the axes of the upper half and the lower half of the sleeve can coincide. Therefore, the device can omit the applicability judgment step. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 It is a schematic diagram of the overall structure of the present invention when the connecting steel bars are eccentric.

[0063] Figure 2 It is a schematic diagram of the overall structure of the present invention when the connecting steel bars are not eccentric.

[0064] Figure 3 It is a schematic sectional view of the upper part of the sleeve of the present invention.

[0065] Figure 4 It is a schematic sectional view of the lower part of the sleeve of the present invention.

[0066] Figure 5This is an assembly schematic diagram between the offset telescopic device group, bolts, and sleeves in the middle part of the present invention.

[0067] Figure 6 This is a three-dimensional structural schematic diagram of the cavity-containing bolt in the present invention.

[0068] Figure 7 This is a three-dimensional structural schematic diagram of the thin-rod-containing bolt in the present invention.

[0069] Figure 8 This is a three-dimensional structural schematic diagram of the offset telescopic device group of the present invention.

[0070] Figure 9 This is a three-dimensional structural schematic diagram of the force-bearing plate structure in the offset telescopic device group of the present invention.

[0071] In the figure: 1. Upper half of the sleeve; 101. Fitting part (upper sleeve); 102. Fixed rib step (upper sleeve); 103. Grouting port (upper sleeve); 104. Slurry outlet (upper sleeve); 105. Sealing layer (upper sleeve); 106. Ring rib (upper sleeve); 107. Connecting bolt hole (upper sleeve); 2. Lower half of the sleeve; 201. Fitting part (lower sleeve); 202. Fixed rib step (lower sleeve); 203. Grouting port (lower sleeve); 204. Slurry outlet (lower sleeve); 205. Sealing layer (lower sleeve); 206. Ring rib (lower sleeve); 207. Connecting bolt hole (lower sleeve); 3. Cavity-containing bolt; 301. Threadless area at the end (short); 302. Middle threaded area; 303. Threadless area at the end (long); 304. Bolt cavity; 305. Thread on the inner wall of the cavity; 4. Thin-rod-containing bolt; 401. Flat area at the end; 402. Threaded area at the end; 403. Thin-rod bolt part; 5. Upper connecting steel bar; 6. Lower connecting steel bar; 7. Offset telescopic device group; 701. Force-bearing plate; 7011. Straight notch; 7012. Round notch; 7013. Fixed bolt hole; 7014. Thread on the fixed bolt hole; 702. Hinge; 703. Short bolt; 704. Long bolt. Detailed implementation manners

[0072] In the description of the present invention, the orientation or positional relationship indicated by terms such as "upper part" and "lower part" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. The following gives the detailed implementation manners of the present invention. The present invention is not limited to the following specific embodiments, and all equivalent transformations made on the basis of the technical solution of this application fall within the protection scope of the present invention.

[0073] Such as Figure 1 And Figure 5As shown in the figure, the present invention discloses an adjustable grouting sleeve applicable to offset connection of steel bars, and the main body is divided into the upper half part 1 of the sleeve, the lower half part 2 of the sleeve, a cavity-containing bolt 3, a thin-rod-containing bolt 4, an upper connecting steel bar 5, a lower connecting steel bar 6, and a dislocation telescopic device group 7.

[0074] Specifically, the upper half part 1 of the sleeve and the lower half part 2 of the sleeve are respectively connected to the dislocation telescopic device group 7 through the cavity-containing bolt 3 and the thin-rod-containing bolt 4, thereby forming the overall device. The dislocation size between the upper half part 1 of the sleeve and the lower half part 2 of the sleeve can be adjusted by adjusting the telescopic length of the dislocation telescopic device group 7.

[0075] Preferably, when the dislocation telescopic device group 7 is at the maximum telescopic length, the axial distance between the upper half part 1 of the sleeve and the lower half part 2 of the sleeve is 1 times the diameter of the main body part of the upper half part 1 of the sleeve or the lower half part 2 of the sleeve.

[0076] Specifically, the upper connecting steel bar 5 and the lower connecting steel bar 6 are respectively inserted into the upper half part 1 of the sleeve and the lower half part 2 of the sleeve, and then grouting material is poured in.

[0077] As Figure 2 and Figure 5 shown, for the adjustable grouting sleeve disclosed by the present invention, when the cavity-containing bolt 3 and the thin-rod-containing bolt 4 are tightened, the axes of the upper half part 1 of the sleeve and the lower half part 2 of the sleeve can coincide, and further, in terms of the appearance form, it is like an ordinary full grouting sleeve. That is, the device of the present invention can also be used in the working condition where the upper connecting steel bar 5 and the lower connecting steel bar 6 are not offset.

[0078] Specifically, when the dislocation telescopic device group 7 contracts, it can be completely folded and hidden in the joint part of the upper half part 1 of the sleeve and the lower half part 2 of the sleeve.

[0079] As Figure 3 shown, the upper half part 1 of the sleeve includes a joint part (upper sleeve) 101, a fixed rib step (upper sleeve) 102, a grouting port (upper sleeve) 103, a slurry outlet (upper sleeve) 104, a sealing layer (upper sleeve) 105, a ring rib (upper sleeve) 106, and a connecting bolt hole (upper sleeve) 107.

[0080] Specifically, the cross-sectional shape of the joint part (upper sleeve) 101 is semi-circular, and the cross-sectional diameter is the same as that of the upper half part 1 of the sleeve.

[0081] Specifically, the fixed rib step (upper sleeve) 102 is located on the inner wall of the joint part (upper sleeve) 101.

[0082] Specifically, the number of the fixed rib steps (upper sleeve) 102 is 2, and the net distance between them is the same as the maximum length of the size of the stress plate 701, so as to facilitate the installation and fixation of the stress plate 701.

[0083] Specifically, when grouting the grouting material, it is poured in from the grouting port (upper sleeve) 103. When the grouting material overflows from the slurry outlet (upper sleeve) 104, it means that the grouting is full.

[0084] Specifically, the sealing layer (upper sleeve) 105 is located on the lower side of the grouting port (upper sleeve) 103 to prevent the grouted slurry from leaking out from the middle of the overall device.

[0085] Specifically, the connecting bolt hole (upper sleeve) 107 is used to insert one of the cavity-containing bolt 3 or the thin-rod-containing bolt 4.

[0086] Specifically, the aperture of the connecting bolt hole (upper sleeve) 107 is the same as the diameters of the non-threaded area (short) 301 at the end and the flat area 401 at the end to ensure fitting and synchronous force application.

[0087] As Figure 4 shown, the lower half 2 of the sleeve includes a splicing part (lower sleeve) 201, a fixed rib step (lower sleeve) 202, a grouting port (lower sleeve) 203, a slurry outlet (lower sleeve) 204, a sealing layer (lower sleeve) 205, a ring rib (lower sleeve) 206, and a connecting bolt hole (lower sleeve) 207.

[0088] Specifically, the cross-sectional shape of the splicing part (lower sleeve) 201 is semi-circular, and the cross-sectional diameter is the same as that of the lower half 2 of the sleeve.

[0089] Preferably, the splicing part (lower sleeve) 201 and the splicing part (upper sleeve) 101 are jointly assembled into one with the same radius dimension and cross-sectional shape as that of the lower half of the sleeve or the upper half of the sleeve.

[0090] Specifically, the fixed rib step (lower sleeve) 202 is located on the inner wall of the splicing part (lower sleeve) 201.

[0091] Specifically, the number of the fixed rib steps (lower sleeve) 202 is 2, and the net distance between them is the same as the maximum length of the dimension of the force-bearing plate 701 to facilitate the installation and fixation of the force-bearing plate 701.

[0092] Specifically, when grouting the grouting material, it is poured in from the grouting port (lower sleeve) 203. When the grouting material overflows from the slurry outlet (lower sleeve) 204, it means that the grouting is full.

[0093] Specifically, the sealing layer (lower sleeve) 205 is located on the upper side of the slurry outlet (lower sleeve) 204 to prevent the grouted slurry from leaking out from the middle of the overall device.

[0094] [[ID=,36]]Specifically, the connecting bolt hole (lower sleeve) 207 is used to insert one of the cavity-containing bolt 3 or the thin-rod-containing bolt 4.

[0095] Specifically, the aperture diameter of the connecting bolt hole (lower sleeve) 207 is the same as the diameters of the non-threaded area (short) 301 at the end and the flat area 401 at the end to ensure fitting and synchronous force application.

[0096] Such as Figure 5 As shown, the two force-bearing plates 701 of the dislocation expansion and contraction device group 7 can be respectively installed between the two fixed rib steps (upper sleeve) 102 and the two fixed rib steps (lower sleeve) 202 to limit the up and down dislocation, and the force-bearing plate 701 can transfer part of the load from the steel bars to the fixed rib steps (upper sleeve) 102 and the fixed rib steps (lower sleeve) 202, so that the load is reasonably distributed.

[0097] Such as Figure 5 As shown, the cavity-containing bolt 3 and the thin-rod bolt 4 can be rotated and adjusted to adjust and control the morphological position of the hinge 702 of the dislocation expansion and contraction device group 7, so as to achieve the desired elongation length.

[0098] Such as Figure 6 As shown, the cavity-containing bolt 3 includes a non-threaded area (short) 301 at the end, a middle threaded area 302, a non-threaded area (long) 303 at the end, a bolt cavity 304, and an inner cavity thread 305.

[0099] Specifically, the diameter of the non-threaded area (short) 301 at the end is the same as the aperture diameter of the connecting bolt hole (upper sleeve) 107 or the connecting bolt hole (lower sleeve) 207 to ensure fitting and synchronous force application after installation.

[0100] Specifically, the thread parameters of the middle threaded area 302 are matched with the thread parameters of the fixing bolt thread 7014 on the inner wall of the fixing bolt hole 7013, so that the middle threaded area 302 can be screwed into the fixing bolt thread 7014, so as to jointly limit the relative position of the force-bearing plate 701 with the fixed rib step (upper sleeve) 102 or the fixed rib step (lower sleeve) 202 to remain unchanged.

[0101] Specifically, the diameter of the non-threaded area (long) 303 at the end should be slightly smaller than the diameter of the non-threaded area (short) 301 at the end to facilitate the installation of the cavity-containing bolt 3.

[0102] Specifically, the inner wall of the bolt cavity 304 is provided with an inner cavity thread 305. The thread parameters of the inner cavity thread 305 are matched with the thread parameters of the thin-rod bolt part 403 of the thin-rod bolt 4, so that the thin-rod bolt part 403 can be screwed into the inner cavity thread 305, so as to adjust the elongation length of the dislocation expansion and contraction device group 7 and play a fixing role to meet the stiffness requirements.

[0103] Such as Figure 7As shown, the thin-rod bolt 4 includes an end flat area 401, an end thread area 402, and a thin-rod bolt part 403.

[0104] Specifically, the diameter of the end flat area 401 is the same as the aperture diameters of the connection bolt holes (upper sleeve) 107 and the connection bolt holes (lower sleeve) 207 to ensure fitting and synchronous force bearing after installation.

[0105] Specifically, the thread parameters of the end thread area 402 match the parameters of the fixing bolt hole thread 7014 on the inner wall of the fixing bolt hole 7013, enabling the end thread area 402 to be screwed into the fixing bolt hole thread 7014, so that the relative position of the force-bearing plate 701 can be jointly restricted by the fixing rib step (upper sleeve) 102 or the fixing rib step (lower sleeve) 202 and remain unchanged.

[0106] Specifically, the diameter of the thin-rod bolt part 403 is smaller than the diameter of the end thread area 402.

[0107] Specifically, the thread parameters of the thin-rod bolt part 403 match the thread parameters of the inner wall thread 305 of the cavity, enabling the thin-rod bolt part 403 to be screwed into the inner wall thread 305 of the cavity, so that the elongation length of the dislocation expansion and contraction device group 7 can be adjusted and a fixing effect can be achieved to meet the stiffness requirements.

[0108] As Figure 8 shown, the dislocation expansion and contraction device group 7 includes a force-bearing plate 701, a hinge 702, a short bolt 703, and a long bolt 704.

[0109] As Figure 8 and Figure 9 shown, the force-bearing plate 701 includes a straight notch 7011, a round notch 7012, a fixing bolt hole 7013, and a fixing bolt hole thread 7014.

[0110] Specifically, the straight notch 7011 penetrates through the force-bearing plate 701, and the long bolt 704 can be accommodated inside the straight notch 7011.

[0111] Specifically, the round notch 7012 penetrates through the force-bearing plate 701, and the diameter of the round notch 7012 is not less than the diameter of the long bolt 704, enabling the long bolt 704 to be accommodated inside it.

[0112] Preferably, the hole directions of the round notch 7012 and the straight notch 7011 are parallel.

[0113] Specifically, the fixing bolt hole 7013 penetrates through the force-bearing plate 701, and the inner wall of the fixing bolt hole 7013 is provided with a fixing bolt hole thread 7014.

[0114] Specifically, the curvature of the surface of the force-bearing plate 701 along the length direction is the same as that of the inner wall surface of the splicing part (upper sleeve) 101 or the splicing part (lower sleeve) 201, and the two can fit together after installation.

[0115] Furthermore, the hole direction of the fixing bolt hole 7013 is perpendicular to the hole directions of the straight slot 7011 and the circular slot 7012.

[0116] Specifically, the hinge 702 is assembled with the force-bearing plate 701 through the long bolt 704.

[0117] Specifically, the hinges 702 are connected through the short bolts 703.

[0118] Specifically, the diameter of the circular through-hole at both ends of the hinge 702 is the same as the diameter of the long bolt 704.

[0119] Specifically, the diameter of the circular through-hole in the middle of the hinge 702 is the same as the diameter of the short bolt 703.

[0120] Specifically, the dislocation telescopic device group 7 includes at least 2 force-bearing plates 701, 4 hinges 702, 2 short bolts 703, and 4 long bolts 704.

[0121] Preferably, the dislocation telescopic device group 7 includes 2 force-bearing plates 701, 8 hinges 702, 8 short bolts 703, and 4 long bolts 704.

[0122] The dislocation telescopic device group 7 adjusts the relative position of the upper half part 1 and the lower half part 2 of the sleeve by adjusting its telescopic length.

[0123] The basic usage method of the above-mentioned adjustable grouting sleeve applicable to the offset connection of steel bars includes the following construction steps.

[0124] Step 1: Hoist and place the upper structural components of the prefabricated building and the prefabricated bridge to be installed in place, so that the upper connecting steel bars 5 to be connected are suspended above the lower connecting steel bars 6 of the corresponding nodes of the lower structural components.

[0125] Step 2: Insert the lower half part 2 of the sleeve of the device of the present invention onto the lower connecting steel bars 6 of the lower structural components, and then slowly lower the hoisted upper structural components to a vertical distance of about 5 cm from the end of the upper half part 1 of the sleeve.

[0126] Step 3: Observe the offset distance between the port of the upper part 1 of the sleeve and the upper connecting steel bar 5 with the naked eye; if the offset distance is very small and can be directly inserted into the upper part 1 of the sleeve, no adjustment is required for the time being; if the offset distance is obvious and cannot be directly inserted into the upper part 1 of the sleeve, adjust the cavity-containing bolt 3 and the thin-rod-containing bolt 4 to adjust and reduce the offset distance between the upper part 1 of the sleeve and the upper connecting steel bar 5 until the port of the upper part 1 of the sleeve is located below the upper connecting steel bar 5 and can be placed in it.

[0127] Step 4: Continue to slowly lower the hoisted upper structural member so that the upper connecting steel bar 5 is inserted into the upper part 1 of the sleeve.

[0128] Step 5: Inject grout into the grouting port (upper sleeve) 103 and the grouting port (lower sleeve) 203 in sequence until the grouting material overflows from the grout outlet (upper sleeve) 104 and the grout outlet (lower sleeve) 204, then the grouting can be stopped.

[0129] The above is only used to illustrate and explain the technical solution of the present invention, rather than any formal limitation on the present invention. Any changes or modifications made by using the above technical content, as long as they do not depart from the principle content of the technical solution of the present invention, still fall within the protection scope of the technical solution of the present invention.

Claims

1. An adjustable grouting sleeve applicable to the offset connection of steel bars, characterized in that: It includes the upper half part (1) and the lower half part (2) of the sleeve; the upper half part (1) and the lower half part (2) of the sleeve are respectively provided with a fitting part (101, 201) and a connecting bolt hole (107, 207); it also includes a dislocation telescopic device group (7), including a cavity bolt (3) and a thin rod bolt (4); wherein the dislocation telescopic device group (7) realizes the adjustable connection of the upper half part (1) and the lower half part (2) of the sleeve through the cavity bolt (3) and the thin rod bolt (4) for adjusting the relative position of the upper half part (1) and the lower half part (2) of the sleeve; the dislocation telescopic device group (7) adjusts the relative position of the upper half part (1) and the lower half part (2) of the sleeve by adjusting its telescopic length; the fitting part (upper sleeve) (101) can be in contact and assembled with the fitting part (lower sleeve) (201), so that the central axes of the upper half part (1) and the lower half part (2) of the sleeve coincide.

2. The adjustable grouting sleeve applicable to the offset connection of steel bars according to claim 1, wherein: The upper half part (1) of the sleeve includes: the splicing part (upper sleeve) (101) with a semi-circular cross-sectional shape and the same cross-sectional diameter as the upper half part (1) of the sleeve; the fixing rib step (upper sleeve) (102) arranged on the inner wall of the splicing part (upper sleeve) (101); the grouting port (upper sleeve) (103); the slurry outlet (upper sleeve) (104); the sealing layer (upper sleeve) (105) located on the lower side of the grouting port (upper sleeve) (103); the ring rib (upper sleeve) (106); the connecting bolt hole (upper sleeve) (107); the lower half part (2) of the sleeve includes: the splicing part (lower sleeve) (201) with a semi-circular cross-sectional shape and the same cross-sectional diameter as the lower half part (2) of the sleeve; the fixing rib step (lower sleeve) (202) arranged on the inner wall of the splicing part (lower sleeve) (201); the grouting port (lower sleeve) (203); the slurry outlet (lower sleeve) (204); the sealing layer (lower sleeve) (205) located on the upper side of the slurry outlet (lower sleeve) (204); the ring rib (lower sleeve) (206); the connecting bolt hole (lower sleeve) (207); the cavity-containing bolt (3) includes: the short end non-threaded area (301) with the same diameter as the aperture of the connecting bolt hole (107, 207); the middle threaded area (302) whose thread parameters match the fixing bolt hole thread (7014); the long end non-threaded area (303) with a diameter slightly smaller than that of the short end non-threaded area (301); the bolt cavity (304); the cavity inner wall thread (305); the thin-rod-containing bolt (4) includes: the end flat area (401) with the same diameter as the aperture of the connecting bolt hole (107, 207); the end threaded area (402) whose thread parameters match the fixing bolt hole thread (7014); the thin-rod bolt part (403) with a diameter smaller than that of the end threaded area (402) and whose thread parameters match the cavity inner wall thread (305).

3. The adjustable grouting sleeve applicable to the offset connection of steel bars according to claim 1, wherein: The dislocation telescopic device group (7) includes: a stress plate (701), which includes: a straight notch (7011); a circular notch (7012) parallel to the hole direction of the straight notch (7011); a fixing bolt hole (7013) penetrating the stress plate (701), and its hole direction is perpendicular to the hole directions of the straight notch (7011) and the circular notch (7012); a fixing bolt hole thread (7014) provided on the inner wall of the fixing bolt hole (7013); the curved surface along the length direction has the same radian as the inner wall curved surface of the splicing part (101, 201) and can be fitted after installation; a hinge (702), which includes: circular through holes at both ends with the same diameter as the long bolt (704); a circular through hole in the middle with the same diameter as the short bolt (703); the short bolt (703) is used to connect the hinge (702); the long bolt (704) is used to assemble the hinge (702) with the stress plate (701); the dislocation telescopic device group (7) at least includes 2 stress plates (701), 4 hinges (702), 2 short bolts (703), and 4 long bolts (704); the long bolt (704) is installed in the straight notch (7011) and can translate and rotate.

4. An adjustable grouting sleeve applicable to the offset connection of steel bars according to claim 1, characterized in that: Each of the splicing parts (upper sleeve) (101) and the splicing part (lower sleeve) (201) is provided with 2 fixing rib steps (upper sleeve) (102) and the fixing rib step (lower sleeve) (202). The fixing rib steps (102, 202) are respectively located on the inner walls of the splicing parts (101, 201). The net distance between the 2 fixing rib steps (102, 202) on the same half sleeve is the same as the maximum length of the size of the stress plate (701), which is used to install and fix the stress plate (701) that fits with each other and share the load on the stress plate (701) from the upper connecting steel bar (5) and the lower connecting steel bar (6); the sealing layer (upper sleeve) (105) is located on the lower side of the grouting port (upper sleeve) (103), and the sealing layer (lower sleeve) (205) is located on the upper side of the slurry outlet (lower sleeve) (204) to prevent slurry leakage during grouting of the whole device.

5. An adjustable grouting sleeve applicable to the offset connection of steel bars according to claim 1, characterized in that: The structure and adjustment mechanism of the offset telescopic device group (7) include: Basic composition and quantity requirements: It includes at least 2 of the force-bearing plates (701), 4 of the hinges (702), 2 of the short bolts (703), and 4 of the long bolts (704); preferably includes 2 of the force-bearing plates (701), 8 of the hinges (702), 8 of the short bolts (703), and 4 of the long bolts (704); Adjustment range requirements: The elongation length exceeds the diameter of the grouting area of the upper half (1) and the lower half (2) of the sleeve; the minimum length when shortened is less than the inner diameter of the grouting area of the upper half (1) and the lower half (2) of the sleeve; After folding, it can satisfy the fitting of the fitting part (upper sleeve) (101) and the fitting part (lower sleeve) (201); Connection method: The short non-threaded area (301) at the end of the cavity-containing bolt (3) fits with the connection bolt hole (lower sleeve) (207) after installation; The middle threaded area (302) is screwed into the fixing bolt hole (7013) of the force-bearing plate (701) and matches the fixing bolt hole thread (7014); The flat area (401) at the end of the thin-rod-containing bolt (4) fits with the connection bolt hole (upper sleeve) (107) after installation; The end threaded area (402) is screwed into the fixing bolt hole (7013) of the other force-bearing plate (701); The thin-rod bolt part (403) cooperates with the inner cavity thread (305) on the wall of the bolt cavity (304) and can be screwed in; By adjusting the screwing depth of the cavity-containing bolt (3) and the thin-rod-containing bolt (4), the telescopic adjustment of the offset telescopic device group (7) can be realized, and thus the relative position of the upper and lower halves of the sleeve can be adjusted.

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