Threaded sleeve type adjustable end

Abstract

The utility model relates to the technical field of steel structure foundation pit supporting, and discloses a threaded sleeve type adjustable end which comprises a supporting rod, one end of the supporting rod is fixedly connected with an end plate, the end plate is used for abutting against a steel enclosing purlin, and an external thread section is arranged on the supporting rod. An internal thread section is formed in the first connecting cylinder, the supporting rod is in threaded connection with the first connecting cylinder through the external thread section and the internal thread section, and the end, away from the end plate, of the first connecting cylinder is fixedly connected with a first connecting disc; one end of the second connecting cylinder is fixedly connected with a second connecting disc, the second connecting disc is detachably connected with the first connecting disc, the end, away from the second connecting disc, of the second connecting cylinder is fixedly connected with a third connecting disc, and the third connecting disc is detachably connected with the steel support. Compared with a traditional steel wedge type adjustable end, the steel wedge type adjustable end has better pre-applied axial force maintaining performance, bearing performance and bending resistance.

Description

Technical Field

[0001] The utility model relates to the technical field of steel structure foundation pit support, in particular to a threaded sleeve type flexible end. Background Art

[0002] Steel support systems are widely used in internal support systems due to their many advantages such as light weight, easy lifting, fast and efficient prefabricated installation, easy dismantling and reuse, and low unit cost. In addition, the ability to apply pre-axial force is a unique advantage of the steel support system, which can actively control the deformation of the foundation pit.

[0003] At present, the application and maintenance of preloaded axial force in subway foundation pits are mainly completed by steel wedge-type flexible ends. The steel wedge-type flexible end is set at the end of the steel support and is an important node connecting the enclosure structure and the support structure. The steel wedge-type flexible end is widely used due to a series of advantages.

[0004] However, since the steel wedge is completely separated from the flexible end, the steel wedge flexible end has poor integrity and is subjected to relatively concentrated force, mainly concentrated on the steel wedge, and the force-bearing area of ​​the steel wedge is smaller than that of the steel support. At the same time, since each flexible end is equipped with multiple steel wedges, the steel wedges often experience point force and cannot be fully wedged during the assembly process. Since the steel wedges are concentrated in the middle, the bending resistance of the steel wedge flexible end is low. The above shortcomings reduce the performance of the steel wedge flexible end.

[0005] Therefore, a threaded sleeve type flexible end is urgently needed. Utility Model Content

[0006] The utility model aims to provide a threaded sleeve type flexible end, aiming to solve or improve at least one of the above technical problems.

[0007] To achieve the above purpose, the utility model provides the following solution: The utility model provides a threaded sleeve type flexible end, comprising:

[0008] A support rod, one end of which is fixedly connected to an end plate, the end plate is used to abut against the steel purlin, and the support rod is provided with an external thread section;

[0009] A first connecting tube, wherein an internal thread section is provided in the first connecting tube, the support rod is threadedly connected to the first connecting tube via the external thread section and the internal thread section, and a first connecting plate is fixedly connected to one end of the first connecting tube away from the end plate;

[0010] A second connecting tube, one end of which is fixedly connected to a second connecting plate, the second connecting plate is detachably connected to the first connecting plate, and one end of the second connecting tube away from the second connecting plate is fixedly connected to a third connecting plate, the third connecting plate is detachably connected to a steel support.

[0011] Optionally, a plurality of first reinforcing plates are fixedly connected between the support rod side walls and the end plates.

[0012] Optionally, a plurality of second reinforcing plates are fixedly connected between the outer side wall of the first connecting tube and the first connecting disk.

[0013] Optionally, a plurality of third reinforcing plates are fixedly connected between the outer side wall of the second connecting tube and the third connecting disk.

[0014] Optionally, a plurality of first through holes are formed circumferentially on the first connection plate;

[0015] The second connecting plate is provided with a plurality of through slots in a circumferential direction, and bolts are arranged in series between the through slots and the first through holes.

[0016] Optionally, a plurality of second through holes are circumferentially formed on the third connecting plate, and bolts are strung in the second through holes.

[0017] Optionally, a plurality of handles are fixedly connected to the outer side wall of the first connecting tube.

[0018] Optionally, a plurality of ear plates are fixedly connected to the outer side wall of the second connecting tube, and a jack is provided between the ear plates and the end plates.

[0019] The utility model discloses the following technical effects: by connecting the support rod and the first connecting tube by means of threaded connection of an external thread section and an internal thread section, it has the characteristics of high load-bearing performance, good stability and good transmission performance, and the first connecting tube and the second connecting tube are arranged in a detachable connection mode, which is convenient for flexible adjustment of the overall length, improves the efficiency of steel support erection, can significantly improve the load-bearing performance of the node, and has better pre-axial force retention performance, load-bearing performance and bending resistance than traditional steel wedge-type active ends. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the support rod structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the first connecting tube of the utility model;

[0024] Figure 4It is a schematic diagram of the structure of the second connecting tube of the utility model.

[0025] In the figure: 1. support rod; 2. end plate; 3. external thread section; 4. first connecting tube; 5. internal thread section; 6. first connecting disk; 7. second connecting tube; 8. second connecting disk; 9. third connecting disk; 10. first reinforcing plate; 11. second reinforcing plate; 12. third reinforcing plate; 13. first through hole; 14. through groove; 15. second through hole; 16. handle; 17. ear plate. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] Reference Figure 1-Figure 4 The utility model provides a threaded sleeve type flexible end, comprising:

[0029] A support rod 1, one end of which is fixedly connected to an end plate 2, the end plate 2 is used to butt against the steel purlin, and an external thread section 3 is provided on the support rod 1;

[0030] A first connecting tube 4, in which an internal thread section 5 is provided, the support rod 1 is threadedly connected to the first connecting tube 4 via the external thread section 3 and the internal thread section 5, and one end of the first connecting tube 4 away from the end plate 2 is fixedly connected to a first connecting plate 6;

[0031] The second connecting tube 7 has one end fixedly connected to a second connecting disk 8, which is detachably connected to the first connecting disk 6; the end of the second connecting tube 7 away from the second connecting disk 8 is fixedly connected to a third connecting disk 9, which is detachably connected to the steel support.

[0032] By connecting the support rod 1 and the first connecting tube 4 by threaded connection of the external thread section 3 and the internal thread section 5, it has the characteristics of high load-bearing performance, good stability and good transmission performance, and the first connecting tube 4 and the second connecting tube 7 are arranged to be detachably connected, which is convenient for flexible adjustment of the overall length and improves the efficiency of steel support erection. It can significantly improve the load-bearing performance of the node and has better pre-axial force retention performance, load-bearing performance and bending resistance than the traditional steel wedge-type active end.

[0033] According to a further optimized solution, a plurality of first reinforcing plates 10 are fixedly connected between the side wall of the support rod 1 and the end plate 2 to improve the connection strength between the support rod 1 and the end plate 2 .

[0034] According to a further optimized solution, a plurality of second reinforcing plates 11 are fixedly connected between the outer side wall of the first connecting tube 4 and the first connecting disk 6 to improve the connection strength between the first connecting tube 4 and the first connecting disk 6 .

[0035] According to a further optimized solution, a plurality of third reinforcing plates 12 are fixedly connected between the outer side wall of the second connecting tube 7 and the third connecting disk 9 to improve the connection strength between the second connecting tube 7 and the third connecting disk 9 .

[0036] Further optimizing the solution, a plurality of first through holes 13 are opened on the first connection plate 6 in the circumferential direction;

[0037] The second connecting plate 8 is provided with a plurality of through slots 14 in the circumferential direction, and bolts are arranged in series between the through slots 14 and the first through holes 13 .

[0038] By stringing bolts between the first through hole 13 and the through groove 14 and locking the first connecting plate 6 and the second connecting plate 8 with nuts, the first connecting plate 6 and the second connecting plate 8 can be easily assembled and disassembled.

[0039] Furthermore, a through slot 14 is provided, and a plurality of bolts can be accommodated in the through slot 14, so as to facilitate the connection and assembly of the first connecting plate 6 and the second connecting plate 8 after the first connecting cylinder 4 is rotated.

[0040] As a further optimization scheme, a plurality of second through holes 15 are opened circumferentially on the third connecting plate 9, and the second through holes 15 are used to string bolts, which are connected to the assembly holes on the steel support through the bolts in the second through holes 15 and locked with nuts.

[0041] According to a further optimized solution, a plurality of handles 16 are fixedly connected to the outer side wall of the first connecting tube 4 to facilitate the rotation of the first connecting tube 4 .

[0042] According to a further optimized solution, a plurality of ear plates 17 are fixedly connected to the outer side wall of the second connecting tube 7 , and a jack is arranged between the ear plate 17 and the end plate 2 .

[0043] Directions:

[0044] In the initial state, the first connecting tube 4 is rotated to the end position of the external thread section 3 close to the end plate 2, and the second connecting tube 7 is connected to the steel support and sleeved on the support rod 1 and located at the end of the first connecting tube 4 away from the end plate 2.

[0045] During use, the jack is arranged between the end plate 2 and the ear plate 17 to apply a pre-loaded axial force so that the second connecting tube 7 moves away from the end plate 2 .

[0046] When the preload axial force design value is reached, the first connecting tube 4 is rotated by the handle 16 to move the first connecting tube 4 toward the second connecting tube 7 until the first connecting plate 6 and the second connecting plate 8 are tightly fitted and locked with bolts and nuts. After that, the jack can be removed, thereby achieving the purpose of adjusting the steel support length and applying the preload axial force.

[0047] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A threaded sleeve type flexible end, characterized in that: include: A support rod (1), one end of the support rod (1) being fixedly connected to an end plate (2), the end plate (2) being used to abut against a steel purlin, and the support rod (1) being provided with an external threaded section (3); A first connecting tube (4), wherein an internal thread section (5) is provided in the first connecting tube (4), the support rod (1) and the first connecting tube (4) are threadedly connected via the external thread section (3) and the internal thread section (5), and a first connecting plate (6) is fixedly connected to one end of the first connecting tube (4) away from the end plate (2); A second connecting tube (7), one end of the second connecting tube (7) is fixedly connected to a second connecting plate (8), the second connecting plate (8) is detachably connected to the first connecting plate (6), and one end of the second connecting tube (7) away from the second connecting plate (8) is fixedly connected to a third connecting plate (9), and the third connecting plate (9) is detachably connected to a steel support.

2. The threaded sleeve type flexible end according to claim 1, characterized in that: A plurality of first reinforcing plates (10) are fixedly connected between the side wall of the support rod (1) and the end plate (2).

3. The threaded sleeve type flexible end according to claim 1, characterized in that: A plurality of second reinforcing plates (11) are fixedly connected between the outer side wall of the first connecting tube (4) and the first connecting plate (6).

4. The threaded sleeve type flexible end according to claim 1, characterized in that: A plurality of third reinforcing plates (12) are fixedly connected between the outer side wall of the second connecting tube (7) and the third connecting plate (9).

5. The threaded sleeve type flexible end according to claim 1, characterized in that: The first connection plate (6) is provided with a plurality of first through holes (13) in a circumferential direction; The second connection plate (8) is provided with a plurality of through slots (14) in the circumferential direction, and bolts are arranged in series between the through slots (14) and the first through holes (13).

6. The threaded sleeve type flexible end according to claim 5, characterized in that: The third connection plate (9) is provided with a plurality of second through holes (15) in a circumferential direction, and the second through holes (15) are used for stringing bolts.

7. The threaded sleeve type flexible end according to claim 1, characterized in that: A plurality of handles (16) are fixedly connected to the outer side wall of the first connecting tube (4).

8. The threaded sleeve type flexible end according to claim 1, characterized in that: A plurality of ear plates (17) are fixedly connected to the outer side wall of the second connecting tube (7), and a jack is arranged between the ear plates (17) and the end plate (2).

Images