Built-in coupling sleeve

Abstract

The utility model relates to the technical field of vibration and noise control, in particular to a built-in coupling sleeve. The jacking check block comprises a cylinder body, a jacking check block body and a cover plate, the jacking check block body is integrally arranged, an installation through hole is formed in the middle of the jacking check block body, or the jacking check block body comprises a plurality of sub jacking check block bodies, the installation through hole is defined in the middles of the sub jacking check block bodies, the jacking check block body is arranged at the top of the cylinder body, and the cover plate is buckled through a buckle. Or fixed on the end face of the cylinder through a buckle and a bolt. The cover plate is fixed through the cooperation of the buckles, the bolt pins and the bolts, the number of original fixing bolts is reduced, even all the fixing bolts are omitted, mounting and dismounting operation is simpler and more convenient, construction efficiency is improved, and hidden danger points that the original fixing bolts are loosened are reduced or even eliminated; in addition, the problem that in some special road sections, when the connecting sleeve moves below the steel pipe, the dismounting space of bolts above the cover plate is insufficient is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration and noise control, in particular to a built-in connecting sleeve. Background Art

[0002] With social development and technological advancement, major cities are placing increasing emphasis on the development of urban rail transit, and urban rail construction, particularly underground railways, has been rapidly expanding. To reduce interference with the upper track or surrounding properties and residents, installing floating slab trackbeds in specific sections is a key vibration isolation measure in subway design. Currently used floating slab trackbed isolators are primarily categorized as built-in or side-mounted, depending on their installation method. Traditional built-in vibration isolation devices require a coupling sleeve to be pre-fixed within the floating slab. For example, patent publication CN1297712A discloses a floating trackbed in which the coupling sleeve of the isolation device is mounted within the floating slab. The height of the coupling sleeve is equal to the thickness of the floating slab. During operation, the floating slab is supported on the spring isolator via support blocks. For lifting purposes, lifting blocks and support blocks are spaced apart on the inner wall of the coupling sleeve. For protection, a cover plate is also required on the coupling sleeve. This cover plate is typically made of rubber, plastic, or rubber-composite steel plate to meet the corresponding insulation requirements. The cover is usually fixed to the end of the coupling sleeve by metal screws. After the screws are installed, the insulating cap also needs to be installed.

[0003] The problems of the existing technology include the following aspects. First, the screws and their insulating caps are in a vibrating environment on the floating track bed, and both have the hidden danger of loosening and falling off. Therefore, special attention is required during line inspections, which increases the workload. Second, when installing and removing the cover plate, corresponding tools are required and multiple steps are implemented. The work is relatively cumbersome, affecting construction efficiency. Third, in some special sections, the connection sleeve and the rail are close to each other, or even under the rail. At this time, after the cover plate is placed, there is not enough operating space when installing the fixing screws, resulting in the inability to proceed smoothly with the construction. Fourth, during daily inspections, unless the cover plate is removed, it is not convenient to directly observe the internal state of the connection sleeve. This brings many inconveniences to the daily inspection and maintenance of the floating track bed system.

[0004] In view of this, the market urgently needs a new built-in coupling sleeve structure that meets the needs of easy disassembly and assembly, efficient construction, stable and reliable connection, easy inspection and maintenance, and a wide range of applications. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a built-in connecting sleeve with a simple structure, good applicability, convenient assembly and disassembly, stable and reliable connection, convenient inspection and maintenance, and a wide range of applications.

[0006] The technical solutions adopted in this utility model are as follows:

[0007] A built-in connecting sleeve comprises a cylinder, a lifting block and a cover plate. The lifting block is integrally arranged and a mounting hole is arranged in the middle thereof, or the lifting block comprises multiple sub-lifting blocks, and the mounting hole is surrounded in the middle of the multiple sub-lifting blocks. The lifting block is arranged on the top of the cylinder, and the cover plate is fixed to the end face of the cylinder by a snap buckle, or by a snap buckle combined with bolts.

[0008] Furthermore, a soft cushioning layer is provided on the bottom surface of the cover plate, at least where it contacts the end surface of the cylinder. The purpose of the soft cushioning layer is to elastically deform when the cover plate is installed on the connecting sleeve, creating a sealing effect on the contact surface. Therefore, it is particularly suitable for cast-in-place floating slab applications.

[0009] Furthermore, the clip includes a column and a baffle. The column is fixed to the bottom surface of the cover plate. After the cover plate is installed, the baffle is stuck on the bottom surface of the lifting block, and the column contacts the side of the lifting block. At this time, the arrangement position of the clip column needs to be adapted to the position and shape of the lifting block so that a conflict can be formed, producing a limiting effect. Furthermore, three clips are distributed in an array in the circumferential direction of the bottom surface of the cover plate. The cover plate is rotated so that the baffle is stuck on the bottom surface of the lifting block. The lifting block and the cover plate are also provided with corresponding mounting holes, and pins or bolts are installed in the mounting holes. The three clips can make the installation of the cover plate more stable and the force on the plane more uniform. The mounting holes and pins or bolts are used to prevent the cover plate from rotating under vibration, which may cause the clip to loosen.

[0010] Furthermore, three clips are arranged in a circumferential array around the bottom surface of the cover plate. The cover plate rotates to engage the retaining plate on the bottom surface of the lifting block. The lifting block and cover plate also have corresponding mounting holes, into which bolts or pins are installed. These three clips ensure a more secure installation of the cover plate and more evenly distribute force across the surface. The mounting holes and pins or bolts prevent the cover plate from rotating under vibration, which could cause the clips to loosen.

[0011] Furthermore, the clip includes a housing and a plunger. The housing is a cylindrical body with a through-hole, the axial hole being a tapered hole with a larger diameter at the top. The top of the housing is provided with a shoulder with a larger diameter. The bottom of the housing is provided with 2-4 longitudinal grooves in the circumferential direction that communicate with the axial hole. The top of the plunger is provided with a cylindrical head, and the plunger has a diameter that matches the axial hole of the housing. This structure allows the bottom of the housing to expand outward when the plunger is inserted into the housing, thereby achieving a secure and secure fit.

[0012] Furthermore, the clip is a raised structure on the bottom surface of the cover plate, with a T-shaped groove in the raised structure. The groove opens on the side of the raised structure facing the outer circle of the cover plate and on the bottom surface of the raised structure. The corresponding lifting block is equipped with a T-bolt, and the clip is clamped on the T-bolt. In this way, when installing the cover plate, only the bolts need to be removed and installed on one side, which effectively solves the problem of lack of installation space above the cover plate when it is under the rail.

[0013] Furthermore, the cover plate is made of a transparent material, which allows the interior of the coupling sleeve to be observed without removing the cover plate, greatly facilitating daily inspection work.

[0014] Furthermore, the cover plate is provided with countersunk holes for installing bolts, and insulating caps are provided on the countersunk holes.

[0015] The built-in coupling sleeve of the utility model is provided with only a support block, which is fixed to the inner side wall of the cylinder. A threaded connection hole for jacking installation is provided on the support block along the axial direction of the cylinder. When in use, the jacking device is directly fixed to the support block using a threaded connection piece to complete jacking and leveling.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) Compared with existing products, the cover plate in the present invention is fixed by means of a combination of clips, pins and bolts, which reduces the number of original fixing bolts and even eliminates all fixing bolts. The installation and disassembly operations are simpler and more convenient, which improves the construction efficiency and reduces or even eliminates the potential risk of loosening of the original fixing bolts. In addition, the problem of insufficient space for disassembly and assembly of the bolts above the cover plate when the connecting sleeve is displaced below the steel pipe in some special sections of the road is overcome.

[0018] (2) The cover plate is made of transparent material, and the condition inside the connecting sleeve can be observed through the cover plate, which greatly facilitates daily inspection work.

[0019] (3) A soft cushion layer is provided under the cover plate, which improves the sealing effect of the contact surface between the cover plate and the cylinder. It is especially suitable for the case where the cover plate is made of transparent material and is applied to cast-in-place floating slabs. It has the characteristics of simple structure, good applicability, easy assembly and disassembly, and a wide range of applications. It can be widely used in various built-in vibration isolation devices of floating roadbeds. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is one of the structural schematic diagrams of the built-in connecting sleeve in Example 1.

[0021] Figure 2 This is the second structural diagram of the built-in connecting sleeve in the first embodiment.

[0022] Figure 3 This is one of the structural diagrams of the built-in connecting sleeve in Example 2.

[0023] Figure 4 This is the second structural diagram of the built-in connecting sleeve in the second embodiment.

[0024] Figure 5 for Figure 4 AA section view.

[0025] Figure 6 This is one of the structural diagrams of the built-in connecting sleeve in Example 3.

[0026] Figure 7 This is the second structural diagram of the built-in connecting sleeve in the third embodiment. DETAILED DESCRIPTION

[0027] Example 1

[0028] like Figure 1 and Figure 2 The built-in connecting sleeve of the utility model shown in the figure includes a cover plate 1 and a cylinder body 2. A snap 11 is provided on the bottom surface of the cover plate 1. The snap 11 is a raised structure arranged on the bottom surface of the cover plate 1. A groove with a "T"-shaped cross section is provided in the raised structure. The opening of the groove is provided on the side of the raised structure facing the outer circle of the cover plate 1 and on the bottom surface of the raised structure. A countersunk hole 12 is also provided on the cover plate 1. A bolt 13 is installed inside the countersunk hole 12, and an insulating cap 15 is installed on the top. A lifting block 3 is provided on the top of the cylinder body 2, and two mounting holes 31 are provided on the lifting block 3. One mounting hole 31 is used to mount a bolt 13, and the other is used to mount a T-bolt. The T-bolt is a T-bolt 14.

[0029] When applied, such as Figure 2 As shown, first install the T-bolt 14 into the mounting hole 31; then place the cover plate 1 on the end face of the cylinder 2 of the built-in coupling sleeve, align the clip 11 with the T-bolt 14, and push the cover plate 1 so that the groove of the clip 11 engages and secures the T-bolt 14; then align the countersunk hole 12 of the cover plate 1 with the other mounting hole 31 on the lifting block 3, and install the mounting bolt 13; finally, secure the insulating cap 15 to the opening of the countersunk hole 12. After these steps, the cover plate is installed and secured.

[0030] The number of countersunk holes and clips on the cover plate can be combined in various ways. This example uses only one countersunk hole and one clip for illustration. In practice, two clips and one countersunk hole, or two countersunk holes and one clip, can be used. These various combinations are not detailed here. It should be noted that when using more than two clips, the grooves of each clip should be arranged in parallel.

[0031] The cover plate in the built-in coupling sleeve of the present invention is secured using a snap-fit ​​bolt, combined with a countersunk hole and a bolt. This type of coupling sleeve has the following advantages: the use of snaps and bolts replaces some of the fixing bolts, improving construction efficiency and reducing the potential risk of bolt loosening. During installation, the cover plate is placed on the top surface of the cylinder and then pushed horizontally to secure the snaps and bolts. Therefore, no additional operation is required at the snap-fit ​​point, making it particularly suitable for situations where the operating space above the cover plate is limited, that is, it can adapt to special sections of road where the rails are located above the coupling sleeve. Therefore, the built-in coupling sleeve of the present invention has a wider range of applications.

[0032] It should be noted that the appendix of this example Figure 2 In the description, only the lifting block is an integrated one and the cylinder of the connecting sleeve is cylindrical. In actual application, the lifting block can also include two, three, five or even more lifting blocks. In practice, it can be reasonably designed and selected according to the project needs and product size. The height position of the lifting block in the cylinder can also be adjusted according to the project needs. Accordingly, the length of the pin and bolt can be adapted. I will not go into too much detail here. The shape of the connecting sleeve can also be a triangular prism, a rectangular parallelepiped or other styles. The corresponding cover plate shape can be adapted. I will not give examples one by one here. The above technical solutions are all structural changes based on the technical principles of the utility model, and are all within the protection scope required by the utility model.

[0033] In summary, the built-in connecting sleeve of the utility model has the characteristics of compact structure, good applicability, convenient disassembly and assembly, and reduced bolt usage, and can be widely used in built-in vibration isolation devices of various rail transit floating roadbeds.

[0034] Example 2

[0035] like Figure 3 、 Figure 4 and Figure 5 As shown, the difference between this embodiment and embodiment 1 is that three clips 11 are provided on the bottom surface of the cover plate 1, and the clips 11 include columns 16 and baffles 17. The columns 16 are fixed to the bottom surface of the cover plate and three are distributed in an array in the circumferential direction of the bottom surface of the cover plate. The baffles 17 are provided at the ends of the columns 16. The cover plate 1 is also provided with a mounting hole 12, and a lifting block 3 is provided on the top of the cylinder 2. The lifting block 3 is provided with a mounting hole 31, and the bolt 13 is installed in the mounting hole 12 and the mounting hole 31.

[0036] During use, cover plate 1 is placed on the end face of cylinder 2 and then rotated. This rotation causes the retaining plate 17 to engage the bottom surface of lift block 3, allowing the uprights 16 to contact the sides of lift block 3. The upper mounting holes of lift block 3 and cover plate 1 are aligned, and bolts 13 are then installed in mounting holes 12 and 31. This completes the installation and securing of cover plate 1. To disassemble, simply remove one bolt and rotate the cover plate to complete the entire disassembly process.

[0037] The position and size of the clip's posts and retaining plates must match the structural design of the lifting block, ensuring they engage and secure the cover. The mounting holes and bolts prevent the cover from rotating under vibration, which could lead to loosening, further improving stability and reliability. The three clips ensure a more secure installation of the cover and distribute force evenly across the surface.

[0038] The advantages of the technical solution described in this example are essentially the same as those of Example 1 and will not be repeated here. It should be noted that in this example, the arrangement of three snap-fit ​​arrays provides a better overall securing effect and higher fixing strength for the cover plate. In actual applications, the number of snap-fits can be greater than three, and this is not illustrated in the accompanying drawings, as it falls within the scope of protection claimed by this utility model.

[0039] Example 3

[0040] like Figure 6 and Figure 7 As shown, the built-in connecting sleeve of the utility model includes a cover plate 1 and a cylinder 2. A lifting block 3 is provided on the top of the cylinder 2. A buckle and a mounting hole 12 are provided on the cover plate 1. The buckle includes a shell 4 and a plunger 5. The shell 4 is a cylinder with a through axial hole 41. The axial hole 41 is a tapered hole with a large diameter at the top and a small diameter at the bottom. A shoulder 42 with an enlarged diameter is provided on the top of the shell 4. Four longitudinal grooves 43 connected to the axial hole 41 are provided in the circumferential direction at the bottom of the shell 4. A cylindrical head 51 is provided on the top of the plunger 5. The diameter of the plunger is adapted to the axial hole of the shell. A soft cushion layer 18 is also provided on the cover plate 1. A mounting hole 31 corresponding to the mounting hole 12 is provided on the lifting block 3.

[0041] In this embodiment, the cover plate 1 is made of a transparent material, specifically a plastic material such as organic glass, polycarbonate, or polystyrene. In this embodiment, organic glass is used. The soft cushion layer of the cover plate 1 can be made of a flexible material such as rubber or polyurethane. In this embodiment, rubber is used.

[0042] During application, first place the cover plate 1 on the end face of the cylinder 2, adjust the mounting holes 12 and the mounting holes 31 to align one by one, then insert the housing 4 of the clip into the mounting hole 12 so that the shoulder 42 contacts the surface of the cover plate, and finally insert the plunger 5 into the axial hole 41 of the housing 4 so that the cylindrical head 51 contacts the surface of the shoulder 42. At this point, the cover plate 1 can be fixed to the top of the cylinder 2 by the clip. Since the axial hole 41 is a tapered hole with a large top diameter and a small bottom diameter, combined with the longitudinal groove 43 provided at the bottom of the housing 4. When the plunger 5 is inserted into the housing 4, the bottom of the housing 4 can be expanded outward, thereby achieving a clamping fixation between the clip and the mounting hole 31, and then achieving the fixation of the cover plate 1. When disassembly is required, directly use a flat tool such as a flat screwdriver to pry up and pull out the plunger 5, and then remove the housing 4, and then remove the clip, thereby removing the cover plate 1. In summary, the buckle in this embodiment is very convenient and quick to assemble and disassemble; in addition, the buckle is fixed by expansion and deformation, and there is no risk of the buckle loosening or falling off in a vibration environment.

[0043] The cover plate in this embodiment is made of transparent material. In actual application, the internal situation of the built-in coupling sleeve can be directly observed through the cover plate. Therefore, it greatly facilitates the daily inspection of the floating track bed and makes it more convenient to check the working status of the built-in vibration isolation device.

[0044] In addition, the cover plate 1 is provided with a soft cushioning layer 18 at the point of contact with the sleeve. Once the cover plate is snap-fastened to the cylinder 2, the soft cushioning layer is squeezed and deformed, creating a seal. This structure is particularly suitable for cast-in-place floating slabs, effectively preventing cement mortar from flowing into the internal connecting sleeve during on-site pouring.

[0045] It should be noted that the number and position of the clips on a cover plate correspond to the position and number of the mounting holes on the cover plate and the jacking block. In actual application, a variety of styles can be formed based on the structural design of the built-in coupling sleeve. The longitudinal grooves on the clip housing are used to facilitate outward expansion and deformation of the housing. In addition to the four grooves mentioned in this example, other numbers such as two or three are also possible. Based on the basic principles of this embodiment, other simple variations can also meet the requirements of the built-in coupling sleeve of the utility model and achieve excellent technical effects, all of which are within the scope of protection required by the utility model.

[0046] In summary, the technical solution described in this embodiment has the following major advantages. First, the installation and removal of the clips are simple and convenient, requiring no special tools. Second, the clips and cover plates in this embodiment are free from the risk of loosening and falling off due to long-term vibration. Third, the cover plates in this embodiment are transparent, allowing direct observation of the interior of the built-in coupling sleeve, greatly facilitating routine inspections. Fourth, the cover plates in this embodiment offer excellent sealing properties, making them particularly suitable for cast-in-place floating slab track beds.

[0047] The embodiments of the present invention are only for better explanation of the technical solutions of the present invention and should not be regarded as limiting the present invention. The technical features of the various embodiments can also be used interchangeably. For example, the buckle in the third embodiment can also be used in the second embodiment to replace the bolts. Based on the technical principles of the present invention, those skilled in the art can re-combine the technical solutions described in the above embodiments or use similar technologies to simply replace some of the components. As long as they are based on the technical principles of the present invention, they are all within the scope of protection required by the present invention.

Claims

1. A built-in coupling sleeve, comprising a cylinder, a lifting block and a cover plate, wherein the lifting block is integrally arranged and a mounting hole is provided in the middle thereof, or the lifting block comprises multiple sub-lifting blocks, the multiple sub-lifting blocks enclosing the mounting hole in the middle thereof, and the lifting block is arranged at the top of the cylinder, characterized in that: The cover plate is fixed to the end surface of the cylinder by means of a buckle or a buckle combined with bolts.

2. The built-in coupling sleeve according to claim 1, characterized in that: A soft cushion layer is provided on the bottom surface of the cover plate at least at the position in contact with the end surface of the cylinder.

3. The built-in coupling sleeve according to claim 1, characterized in that: The buckle includes a column and a baffle, the column is fixed on the bottom surface of the cover plate, after the cover plate is installed, the baffle is clamped on the bottom surface of the lifting block, and the column contacts the side surface of the lifting block.

4. The built-in coupling sleeve according to claim 1, wherein: The buckles are distributed in an array of three in the circumferential direction on the bottom surface of the cover plate. The cover plate is rotated to clamp the baffle on the bottom surface of the lifting block. The lifting block and the cover plate are also provided with corresponding mounting holes, and bolts are installed in the mounting holes.

5. The built-in coupling sleeve according to claim 1, wherein: The buckle includes a shell and a plunger. The shell is a cylinder with a through axial hole. The axial hole is a tapered hole with a large diameter at the top. A shoulder with a larger diameter is provided on the top of the shell. The bottom of the shell is provided with 2-4 longitudinal grooves connected to the axial hole in the circumferential direction. A cylindrical head is provided on the top of the plunger, and the diameter of the plunger is adapted to the axial hole of the shell.

6. The built-in coupling sleeve according to claim 1, characterized in that: The buckle is a raised structure arranged on the bottom surface of the cover plate, and a groove with a "T"-shaped cross-section is provided in the raised structure. The opening of the groove is provided on the side of the raised structure facing the outer circle of the cover plate and on the bottom surface of the raised structure. A T-shaped bolt is provided on the corresponding lifting block, and the buckle is clamped on the T-shaped bolt.

7. The built-in coupling sleeve according to claim 1, characterized in that: The cover plate is made of transparent material.

8. The built-in coupling sleeve according to claim 1, wherein: The cover plate is provided with countersunk holes for installing bolts, and insulating caps are provided on the countersunk holes.

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