Duct piece hoisting traction chain tensioning device

Abstract

The utility model discloses a tensioning device for a segment hoisting traction chain. The tensioning device comprises a spiral buckle body, the first threaded sleeve is arranged at one end of the spiral buckle body; the second threaded sleeve is arranged at the other end of the spiral buckle body; the first threaded rod is movably connected with the first threaded sleeve, one end of the first threaded rod is arranged in the spiral buckle body, and the other end of the first threaded rod penetrates through the first threaded sleeve and extends outwards; the second screw rod is movably connected with the second threaded sleeve, one end of the second screw rod is arranged in the spiral buckle body, and the other end of the second screw rod penetrates through the second threaded sleeve and extends outwards; the first joint is arranged at the extension end of the first screw rod and is movably connected with a pipe piece lifting trolley; the second joint is arranged at the extending end of the second screw rod and is connected with a traction chain; and the roller mounting frame is arranged on the second joint in a sleeving manner. According to the technical scheme, tensioning adjustment is easy, the device can adapt to a bent walking track, the running stability of the chain is improved, and the service life of the device is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of shield machine segment lifting, and more specifically, to a segment lifting traction chain tensioning device. Background Art

[0002] In tunnel construction, due to the characteristics of the back-end structure of the shield machine, the segments cannot be directly transported to the segment assembly position. The segments must be hoisted onto the segment hoisting vehicle through the segment hoisting device, and then the segment hoisting vehicle will transfer them to the bottom of the segment assembly machine for the segment assembly machine to grab and assemble. In the prior art, the segment hoisting device of the shield machine is divided into two categories: one-stop direct type and multi-station transfer type. The one-stop direct type reduces the work of hoisting and transfer, has high hoisting efficiency, and is widely used. In the one-stop direct type segment hoisting device, the walking track laid by the segment hoisting device is generally an "S"-shaped curved track on the vertical plane. When the segment hoisting vehicle needs to be traction-formed when walking on the track, the tensioning device of the traction chain is particularly important.

[0003] At present, in the one-stop direct segment lifting device, there are usually two ways to tension the traction chain: first, by shifting the driving sprocket to tension the traction chain; second, by installing a "screw + nut" adjustment device at the connection between the segment lifting vehicle and the traction chain, and adjusting the telescopic length of the screw to achieve the effect of tensioning the chain. However, the sprocket shift adjustment is complicated to operate and has limitations, especially the sprocket adjustment at the driving end is difficult; and the "screw + nut" adjustment device, after the segment lifting vehicle is installed on the walking track, there is no space for tensioning adjustment of the device, and the operation is complicated. When the screw is pulled, it will generate a large deflection force due to the "S" shape and other curved tracks, which is easy to damage the tensioning device and affect the stability of the chain operation, and cannot meet the actual use needs of segment lifting.

[0004] Therefore, how to provide a segment lifting and traction chain tensioning device, which has easy tensioning adjustment, can adapt to curved walking tracks, and extend the stability of chain operation and the service life of the device has become a technical problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0005] In order to solve the above technical problems, the present application provides a segment lifting and traction chain tensioning device, which has simple tensioning adjustment, can adapt to curved walking tracks, and improve the stability of chain operation and the service life of the device.

[0006] The technical solutions provided by this application are as follows:

[0007] The present application provides a tensioning device for a segment hoisting and towing chain, comprising: a turnbuckle body; a first threaded sleeve disposed at one end of the turnbuckle body; a second threaded sleeve disposed at the other end of the turnbuckle body; a first screw rod movably connected to the first threaded sleeve, with one end of the first screw rod disposed inside the turnbuckle body and the other end extending outward through the first threaded sleeve; a second screw rod movably connected to the second threaded sleeve, with one end of the second screw rod disposed inside the turnbuckle body and the other end extending outward through the second threaded sleeve; a first joint disposed at the extended end of the first screw rod and movably connected to the segment hoisting vehicle; a second joint disposed at the extended end of the second screw rod and connected to the towing chain; and a roller mounting bracket sleeved on the second joint.

[0008] Further, in a preferred embodiment of the present utility model, the turnbuckle body comprises:

[0009] Ring rods arranged side by side;

[0010] Threaded connection seats disposed at both ends of the ring rods.

[0011] Further, in a preferred embodiment of the present utility model, the first joint comprises:

[0012] A pin connection head disposed at the end of the first screw rod and integrally formed with the first screw rod;

[0013] A first through hole disposed on the pin connection head;

[0014] A limit pin passing through the first through hole.

[0015] Further, in a preferred embodiment of the present utility model, the tensioning device for the segment hoisting and towing chain further comprises: a pin fixing seat disposed on the segment hoisting vehicle and movably connected to the limit pin.

[0016] Further, in a preferred embodiment of the present utility model, the second joint and the roller mounting bracket are installed using a square sliding pair.

[0017] Further, in a preferred embodiment of the present utility model, the second joint comprises:

[0018] A limit block sleeved on the second screw rod;

[0019] A chain connection head disposed at one end of the limit block and connected to the towing chain;

[0020] A second through hole is disposed on the chain connection head.

[0021] Further, in a preferred embodiment of the present utility model, the roller mounting bracket comprises:

[0022] Mounting frame

[0023] The third through hole provided on the mounting frame

[0024] The chain connector penetrates through the third through hole and is slidably clamped with the mounting frame

[0025] The automatic guiding mechanism provided at the upper and lower ends of the mounting frame

[0026] The bumps provided at the left and right ends of the mounting frame

[0027] Furthermore, in a preferred embodiment of the present utility model, the automatic guiding mechanism includes:

[0028] The ear plates symmetrically arranged side by side on the mounting frame

[0029] The fourth through hole provided on the ear plate

[0030] The roller shaft penetrating through the fourth through hole

[0031] The guiding roller provided between the ear plates and movably connected to the roller shaft

[0032] The guiding roller is sleeved on the roller shaft

[0033] Furthermore, in a preferred embodiment of the present utility model, the ear plates, the bumps and the mounting frame are integrally formed

[0034] Chamfer structures are provided on the left and right sides of the bumps in the traveling direction

[0035] Furthermore, in a preferred embodiment of the present utility model, the first threaded sleeve, the second threaded sleeve and the threaded connection seat are specifically hexagon nuts

[0036] A tensioning device for the sling traction chain of segment lifting provided by the utility model comprises: a turnbuckle body; a first threaded sleeve arranged at one end of the turnbuckle body; a second threaded sleeve arranged at the other end of the turnbuckle body; a first screw rod movably connected to the first threaded sleeve, with one end of the first screw rod arranged inside the turnbuckle body and the other end extending outwards through the first threaded sleeve; a second screw rod movably connected to the second threaded sleeve, with one end of the second screw rod arranged inside the turnbuckle body and the other end extending outwards through the second threaded sleeve; a first joint arranged at the extending end of the first screw rod and movably connected to the segment lifting vehicle; a second joint arranged at the extending end of the second screw rod and connected to the traction chain; and a roller mounting bracket sleeved on the second joint. In the tensioning device for the sling traction chain of segment lifting of the present utility model, its structural main body is composed of the turnbuckle body, the first threaded sleeve, the second threaded sleeve, the first screw rod, the second screw rod, the first joint, the second joint and the roller mounting bracket; the first screw rod and the second screw rod are respectively installed at both ends of the turnbuckle body, wherein one end of the first screw rod penetrates through the first threaded sleeve and extends outwards, and the extending end is provided with the first joint. The device is installed on the segment lifting vehicle through the first joint and is movably connected to the segment lifting vehicle, enabling the chain tensioning device to freely rotate around the segment lifting vehicle in the vertical plane to adapt to curved running tracks such as "S" - shaped tracks; similarly, one end of the second screw rod penetrates through the second threaded sleeve and extends outwards, and the extending end is provided with the second joint. The device is connected to the traction chain through the second joint, and the roller mounting bracket is sleeved on the second joint. The tensioning device adapts to curved running tracks such as "S" - shaped tracks through the rollers on the roller mounting bracket to achieve automatic guiding; the chain tensioning device is an intermediate connecting piece, with one end movably connected to the segment lifting vehicle and the other end connected to the traction chain. When the traction chain needs to be tensioned, the first threaded sleeve or the second threaded sleeve is used to make the first screw rod, the second screw rod or both rotate and contract inside the turnbuckle body simultaneously, so that the screw rod contracts and tightens the traction chain; when the traction chain is too tight and needs to be relaxed, the first threaded sleeve and the second threaded sleeve are used to make the first screw rod, the second screw rod or both rotate and extend inside the turnbuckle body simultaneously, so that the screw rod moves outwards and relaxes the traction chain. It can be seen that the technical solution provided by the present utility model, compared with the prior art, has simple tensioning adjustment, can adapt to curved running tracks, improves the running stability of the chain and the service life of the device. Brief Description of the Drawings

[0037] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0038] Figure 1 Schematic structural diagram of the segment lifting traction chain tensioning device provided by the embodiment of the present utility model;

[0039] Figure 2 Schematic installation structure diagram of the segment lifting traction chain tensioning device provided by the embodiment of the present utility model;

[0040] Figure 3 Schematic structural diagram of the first joint provided by the embodiment of the present utility model;

[0041] Figure 4 Schematic structural diagram of the second joint provided by the embodiment of the present utility model;

[0042] Figure 5 Schematic structural diagram of the roller mounting bracket provided by the embodiment of the present utility model. Detailed implementation manners

[0043] In order to enable those skilled in the art to better understand the technical solutions in the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0044] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly disposed on the other element; when an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0045] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "first", "second", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present application 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, and therefore should not be construed as a limitation to the present application.

[0046] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" and "several" mean two or more, unless otherwise specifically defined.

[0047] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the implementation conditions of this application. Therefore, they do not have substantial technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the efficacy that this application can produce and the purpose that can be achieved, should still fall within the scope that the technical content disclosed in this application can cover.

[0048] As Figures 1 to 5 shown, the segment hoisting and traction chain tensioning device provided by the embodiment of this application includes: a turnbuckle body 1, a first threaded sleeve 2, a second threaded sleeve 3, a first screw rod 4, a second screw rod 5, a first joint 6, a second joint 7, and the roller mounting bracket 8.

[0049] The present utility model provides a segment hoisting and traction chain tensioning device, specifically including: a turnbuckle body 1; a first threaded sleeve 2 arranged at one end of the turnbuckle body 1; a second threaded sleeve 3 arranged at the other end of the turnbuckle body 1; a first screw rod 4 movably connected to the first threaded sleeve 2, with one end of the first screw rod 4 arranged inside the turnbuckle body 1 and the other end extending outwards through the first threaded sleeve 2; a second screw rod 5 movably connected to the second threaded sleeve 3, with one end of the second screw rod 5 arranged inside the turnbuckle body 1 and the other end extending outwards through the second threaded sleeve 3; a first joint 6 arranged at the extending end of the first screw rod 4 and movably connected to the segment hoisting vehicle 9; a second joint 7 arranged at the extending end of the second screw rod 5 and connected to the traction chain 10; a roller mounting bracket 8 sleeved on the second joint 7. The technical solution provided by the present utility model, compared with the prior art, is simple in tensioning adjustment, can adapt to a curved running track, improves the running stability of the chain and the service life of the device.

[0050] The following specifically elaborates on the technical solution of the present utility model in conjunction with embodiments:

[0051] Specifically, in the embodiment of the present utility model, the turnbuckle body 1 includes: ring rods 11 arranged side by side; threaded connection seats 12 arranged at both ends of the ring rods 11.

[0052] Specifically, in the embodiment of the present utility model, the first threaded sleeve 2, the second threaded sleeve 3, and the threaded connection seat 12 are specifically hex nuts.

[0053] As Figure 1 shown, in the implementation of the present utility model, the screw buckle body 1 is used to install the first screw rod 4 and the second screw rod 5, so that the first screw rod 4 and the second screw rod 5 can perform rotational contraction or extension movements within the screw buckle body 1; wherein, the main structure of the screw buckle body 1 is composed of the ring rod 11 and the threaded connection seat 12, and the threaded connection seat 12 is installed at both ends of the ring rod 11, and the first screw rod 4 and the second screw rod 5 are arranged within the ring rod 11; in this embodiment, there are two ring rods 11, and the two are arranged side by side symmetrically, the threaded connection seat 12 adopts a hex nut, and the first screw rod 4 and the second screw rod 5 respectively pass through the hex nuts at both ends of the ring rod 11 and are spirally movably connected to the hex nuts.

[0054] Specifically, in the embodiment of the present utility model, the first joint 6 includes: a pin connection head 13 provided at the end of the first screw rod 4 and integrally formed with the first screw rod 4; a first through hole provided on the pin connection head 13; and a limit pin 14 passing through the first through hole.

[0055] Specifically, in the embodiment of the present utility model, the segment hoisting and traction chain tensioning device further includes: a pin fixing seat provided on the segment hoisting vehicle 9 and movably connected to the limit pin 14.

[0056] As Figure 3 shown, in the embodiment of the present utility model, the first joint 6 is integrally formed with the first screw rod 4; the first joint 6 is movably connected to the segment hoisting vehicle 9, so that the entire chain tensioning device can freely rotate around the segment hoisting vehicle 9 in the vertical plane to adapt to the "S"-shaped walking track; wherein, the main structure of the first joint 6 is composed of the pin connection head 13 and the limit pin 14; the limit pin 14 is installed on the pin connection head 13 through the first through hole, and by using the limit pin 14, the pin connection head 13 can be installed on the pin fixing seat and movably connected to the pin fixing seat.

[0057] Specifically, in the embodiment of the present utility model, the second joint 7 and the roller mounting frame 8 are installed by a square sliding pair.

[0058] Specifically, in the embodiment of the present utility model, the second joint 7 includes: a limit block 15 sleeved on the second screw rod 5; a chain connection head 16 provided at one end of the limit block 15 and connected to the traction chain 10; and a second through hole 17 provided on the chain connection head 16.

[0059] AsFigure 4 As shown in the figure, in the embodiment of the present utility model, the second joint 7 and the second screw rod 5 are integrally formed, and the second joint 7 is used to connect the traction chain 10; wherein, the main structure of the second joint 7 is composed of the limiting block 15 and the chain connection head 16, and the two are integrally formed; the chain connection head 16 is set to be square, and it is installed with the roller mounting frame 8 by a square sliding pair. After installation, the end face of the limiting block 15 abuts against the roller mounting frame 8 to limit the sliding position of the roller mounting frame 8 on the chain connection head 16.

[0060] Specifically, in the embodiment of the present utility model, the roller mounting frame 8 includes: a mounting frame body 18; a third through hole 19 provided on the mounting frame body 18; the chain connection head 16 passes through the third through hole 19 and is slidably clamped with the mounting frame body 18; an automatic guiding mechanism 20 provided at the upper and lower ends of the mounting frame body 18; and convex blocks 21 provided at the left and right ends of the mounting frame body 18.

[0061] Among them, as Figure 5 As shown in the figure, in the embodiment of the present utility model, the main structure of the roller mounting frame 8 is composed of the mounting frame body 18, the automatic guiding mechanism 20 and the convex blocks 21; a third through hole 19 is provided on the mounting frame body 18, and the third through hole 19 is specifically a square through hole for slidably clamping with the chain connection head 16; the automatic guiding mechanism 20 is provided at the upper and lower ends of the mounting frame body 18. By providing the automatic guiding mechanism 20, the chain tensioning device can adapt to the "S"-shaped bending walking track when moving forward, realizing automatic guiding; and the convex blocks 21 are provided on both sides of the mounting frame body 18 and are integrally formed with the mounting frame body 18.

[0062] Specifically, in the embodiment of the present utility model, the automatic guiding mechanism 20 includes: ear plates 22 arranged symmetrically side by side on the mounting frame body 18; a fourth through hole provided on the ear plates 22; a roller shaft 23 passing through the fourth through hole; a guiding roller 24 provided between the ear plates 22 and movably connected to the roller shaft 23; the guiding roller 24 is sleeved on the roller shaft 23.

[0063] Specifically, in the embodiment of the present utility model, the ear plates 22, the convex blocks 21 and the mounting frame body 18 are integrally formed; chamfer structures 25 are provided on the left and right sides of the convex blocks 21 in the walking direction.

[0064] As Figure 5As shown in the figure, in the embodiment of the present utility model, two sets of the automatic guiding mechanism 20 are provided. The main structure of each set of the automatic guiding mechanism 20 is composed of the ear plates 22, the roller shafts 23 and the guiding rollers 24; the two ear plates 22 are symmetrically arranged, the roller shafts 23 are horizontally arranged on the ear plates 22, the guiding rollers 24 are sleeved on the roller shafts 23 and are movably connected to the roller shafts 23. By arranging the upper and lower two sets of the guiding rollers 24, the chain tensioning device can adapt to the "S"-shaped walking track to realize automatic guiding; the chamfer structure 25 is arranged on the bump 21, which can ensure the smooth traction and advancement of the chain tensioning device along the walking track.

[0065] More specifically, the segment hoisting and traction chain tensioning device provided by the embodiment of the present utility model can solve the problems of the existing chain tensioning device, such as unreliable adjustment, complex operation, inability to adapt to the "S"-shaped walking track, and affecting the service life of the device. In the segment hoisting and traction chain tensioning device of the present utility model, its structural main body is composed of the turnbuckle body 1, the first threaded sleeve 2, the second threaded sleeve 3, the first screw rod 4, the second screw rod 5, the first joint 6, the second joint 7 and the roller mounting bracket 8; the first screw rod 4 and the second screw rod 5 are respectively installed at both ends of the turnbuckle body 1. One end of the first screw rod 4 penetrates through the first threaded sleeve 2 and extends outwards, and the first joint 6 is arranged at its extended end. The device is installed on the segment hoisting vehicle 9 through the first joint 6 and is movably connected to the segment hoisting vehicle 9, which can enable the chain tensioning device to freely rotate around the segment hoisting vehicle 9 in the vertical plane to adapt to curved walking tracks such as the "S" shape; similarly, one end of the second screw rod 5 penetrates through the second threaded sleeve 3 and extends outwards, and the second joint 7 is arranged at its extended end. The device is connected to the traction chain 10 through the second joint 7, and the roller mounting bracket 8 is sleeved on the second joint 7. The tensioning device adapts to curved walking tracks such as the "S" shape through the rollers on the roller mounting bracket 8 to realize automatic guiding, which can improve product quality and reduce manual labor intensity; the chain tensioning device is an intermediate connecting piece, one end is movably connected to the segment hoisting vehicle 9, and the other end is connected to the traction chain 10. When the traction chain 10 needs to be tensioned, the first threaded sleeve 2 or the second threaded sleeve 3 is used to make the first screw rod 4, the second screw rod 5 or both rotate and contract in the turnbuckle body 1 at the same time, so that the screw rod contracts and tightens the traction chain 10; when the traction chain 10 is too tight and needs to be relaxed, the first threaded sleeve 2 and the second threaded sleeve 3 are used to make the first screw rod 4, the second screw rod 5 or both rotate and extend in the turnbuckle body 1 at the same time, so that the screw rod moves outwards and extends to relax the traction chain 10. It can be seen that the technical solution provided by the present utility model, compared with the prior art, has simple tensioning adjustment, can adapt to curved walking tracks, improves the running stability of the chain and the service life of the device.

[0066] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A segment lifting traction chain tensioning device, characterized in that: include: Turnbuckle body; A first threaded sleeve disposed at one end of the screw button body; A second threaded sleeve disposed at the other end of the screw button body; A first screw rod movably connected to the first threaded sleeve, wherein one end of the first screw rod is disposed in the screw button body, and the other end of the first screw rod passes through the first threaded sleeve and extends outward; A second screw rod movably connected to the second threaded sleeve, wherein one end of the second screw rod is disposed in the screw button body and the other end of the second screw rod passes through the second threaded sleeve and extends outward; A first joint provided at the extended end of the first screw rod and movably connected to the segment lifting vehicle; A second joint provided at an extended end of the second screw rod and connected to a traction chain; A roller mounting frame is sleeved on the second joint.

2. The segment lifting and traction chain tensioning device according to claim 1 is characterized in that: The spiral buckle body comprises: Ring rods arranged side by side; Threaded connection seats are arranged at both ends of the ring rod.

3. The segment lifting and traction chain tensioning device according to claim 1 is characterized in that: The first connector comprises: A pin connector disposed at the end of the first screw and integrally formed with the first screw; A first through hole provided on the pin connector; A limiting pin passes through the first through hole.

4. The segment hoisting and traction chain tensioning device according to claim 3 is characterized in that: The segment hoisting and traction chain tensioning device also includes: A pin shaft fixing seat is arranged on the pipe segment lifting vehicle and is movably connected to the limit pin shaft.

5. The segment hoisting and traction chain tensioning device according to claim 1 is characterized in that: The second joint and the roller mounting frame are mounted using a square sliding pair.

6. The segment hoisting and traction chain tensioning device according to claim 1 is characterized in that: The second connector comprises: A limiting block sleeved on the second screw rod; A chain connector disposed at one end of the limit block and connected to the traction chain; The chain connector is provided with a second through hole.

7. The segment hoisting and traction chain tensioning device according to claim 6 is characterized in that: The roller mounting frame comprises: Install the frame; A third through hole provided on the mounting frame; The chain connector passes through the third through hole and is slidably engaged with the mounting frame; Automatic guide mechanisms disposed at the upper and lower ends of the mounting frame; The protrusions are arranged at the left and right ends of the mounting frame.

8. The segment hoisting and traction chain tensioning device according to claim 7 is characterized in that: The automatic guiding mechanism comprises: Ear plates symmetrically arranged side by side on the mounting frame; A fourth through hole is provided on the ear plate; a roller shaft passing through the fourth through hole; A guide roller disposed between the ear plates and movably connected to the roller shaft; The guide roller is sleeved on the roller shaft.

9. The segment hoisting and traction chain tensioning device according to claim 8, characterized in that: The ear plate, the protrusion and the mounting frame are integrally formed; The left and right sides of the protrusion are provided with chamfer structures in the walking direction.

10. The segment hoisting and traction chain tensioning device according to claim 2, characterized in that: The first threaded sleeve, the second threaded sleeve and the threaded connection seat are specifically hexagonal nuts.

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