Rotation limiting device for large vertical pipeline and construction method of rotation limiting device

Abstract

The invention discloses a rotation limiting device for a large vertical pipeline and a construction method of the rotation limiting device. The rotation limiting device for the large vertical pipeline comprises two supports which are installed on the two opposite side walls of a pipe well; the fixed shafts are vertically arranged and are mounted on the opposite sides of the two brackets; the bearing is coaxially installed on the fixing shaft, the outer ring of the bearing abuts against the circumferential face of a vertical pipeline in the tube well, and a rotating device supported at the lower end of the vertical pipeline is installed on the lower portion of the tube well. The method solves the problem that the back welding operation of the vertical pipe is not easy when the vertical pipe in the pipe well is welded by adopting a traditional method.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a rotation limiting device for a large vertical pipeline and a construction method thereof. Background Art

[0002] In actual projects, the risers in the air conditioning water pipe shaft are relatively large and the space is relatively narrow. The traditional method of welding the risers requires operators to work in a narrow space. At present, most construction sites use a manual hoist set up at the top of the pipe shaft to lift the risers to the corresponding floor and then weld them one by one from top to bottom. The welding of the rear part of the pipe against the wall is labor-intensive and time-consuming, and the welds are uneven, which increases the risk of water and air leakage in the welds. Summary of the invention

[0003] In order to overcome the defects of the prior art, a rotation limit device for a large vertical pipeline and a construction method thereof are provided to solve the problem that the back welding operation of the riser in the pipe shaft is difficult when the riser is welded by the traditional method.

[0004] In order to achieve the above object, a rotation limiting device for a large vertical pipeline is provided, comprising:

[0005] Two brackets, the two brackets are installed on two opposite side walls of the pipe well;

[0006] A vertically arranged fixed shaft is installed on opposite sides of the two brackets;

[0007] A bearing is coaxially mounted on the fixed shaft, an outer ring of the bearing abuts against the circumferential surface of the vertical pipe in the pipe well, and a rotating device supported on the lower end of the vertical pipe is installed at the lower part of the pipe well.

[0008] Furthermore, the bearings are respectively installed at the upper and lower ends of the fixed shaft.

[0009] Furthermore, the bottom and top of the bracket are respectively connected to support plates, the support plates are connected to the fixed shaft, and the two bearings are respectively against the opposite sides of the two support plates.

[0010] Furthermore, it also includes a pipe clamp, which is detachably sleeved on the outside of the vertical pipe, and a ring groove is opened at the bottom of the pipe clamp, and the upper ends of the two fixed shafts are slidably arranged in the ring groove.

[0011] Furthermore, the pipe clamp includes two arc-shaped plates, the inner arc surfaces of the two arc-shaped plates are arranged opposite to each other, the inner arc surfaces of the two arc-shaped plates enclose a clamping channel for the vertical pipe to pass through, ear plates are formed at the opposite ends of the two arc-shaped plates, the ear plates at the ends of the two arc-shaped plates are detachably connected together by bolts, and an arc-shaped through groove is formed at the bottom of the arc-shaped plate, and the arc-shaped through grooves of the two arc-shaped plates are connected to form the annular groove.

[0012] Furthermore, a plurality of balls are rotatably mounted on the bottom of the arc-shaped through groove.

[0013] The present invention provides a construction method for a rotation limiter for a large vertical pipeline, comprising the following steps:

[0014] A slewing device is installed at the lower part of the pipe well;

[0015] Hoisting the vertical pipe of the lower layer and placing it on the rotating device, so that the rotating device is supported on the lower end of the vertical pipe of the lower layer;

[0016] Installing a rotation limiting device on two opposite side walls of the pipe well so that the outer ring of the bearing of the rotation limiting device abuts against the circumferential surface of the vertical pipe at the lower layer;

[0017] Lift the vertical pipes on the upper layer so that they are coaxially connected with the vertical pipes on the lower layer;

[0018] Install another rotation limiting device on the two opposite side walls of the pipe well, so that the outer ring of the bearing of the other rotation limiting device abuts against the circumferential surface of the vertical pipe of the upper layer;

[0019] Temporarily weld the vertical pipes of the lower layer to the vertical pipes of the upper layer;

[0020] The welds between the lower vertical pipe and the upper vertical pipe are welded while the lower vertical pipe is rotated.

[0021] The beneficial effect of the present invention is that the rotation limit device for large vertical pipelines of the present invention is simple to operate, and compared with conventional pipeline welding methods, it greatly improves the work efficiency of pipeline back welding, and can complete pipeline welding work more quickly and efficiently, thereby indirectly ensuring on-site construction quality and construction progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0023] Figure 1 The figure is a schematic structural diagram of a rotation limiting device for a large vertical pipeline according to an embodiment of the present invention.

[0024] Figure 2 Schematic diagram of the structure of a fixed shaft according to an embodiment of the present invention.

[0025] Figure 3 Schematic diagram of the structure of a pipe clamp according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] Reference Figures 1 to 3 As shown, the present invention provides a rotation limiting device for a large vertical pipeline, comprising: a bracket 1, a fixed shaft 2, and a bearing 3.

[0029] There are two brackets 1 , which are mounted on two opposite side walls of the pipe well 6 .

[0030] The fixed shaft 2 is arranged vertically. The fixed shaft 2 is installed on the opposite sides of the two brackets 1. Each bracket is installed with a fixed shaft.

[0031] As a preferred implementation, see Figure 1 and Figure 2 As shown, the bottom and top of the bracket 1 are respectively connected with support plates 11. The support plate 11 is connected to the fixed shaft 2. The two bearings 3 are respectively against the opposite sides of the two support plates 11.

[0032] In this embodiment, the bracket is U-shaped. The support plate is trapezoidal. The wider side of the support plate is mounted on the bracket by bolts. The narrower side of the support plate is provided with a notch, and the fixed shaft is embedded in the notch of the support plate.

[0033] The bearing 3 is coaxially mounted on the fixed shaft 2. In this embodiment, the number of the bearings is multiple. The upper and lower ends of the fixed shaft 2 are respectively mounted with bearings 3.

[0034] The inner ring of the bearing is sleeved on the outside of the fixed shaft. The outer ring of the bearing 3 abuts against the circumferential surface of the vertical pipe 5 in the pipe well 6. A slewing device supported at the lower end of the vertical pipe 5 is installed at the lower part of the pipe well 6.

[0035] As a preferred embodiment, the rotation limiting device for large vertical pipelines of the present invention further comprises a pipe hoop 4. The pipe hoop 4 is detachably sleeved on the outside of the vertical pipeline 5. An annular groove is provided at the bottom of the pipe hoop 4. The upper ends of the two fixed shafts 2 are slidably disposed in the annular groove.

[0036] See also Figure 3As shown, the pipe clamp 4 includes two arc-shaped plates 41. The inner arc surfaces of the two arc-shaped plates 41 are arranged opposite to each other. The inner arc surfaces of the two arc-shaped plates 41 enclose a clamping channel for the vertical pipe 5 to pass through. Ear plates 42 are formed at opposite ends of the two arc-shaped plates 41. The ear plates at the ends of the two arc-shaped plates 41 are detachably connected together by bolts. An arc-shaped through groove 410 is formed at the bottom of the arc-shaped plate 41. The arc-shaped through grooves 410 of the two arc-shaped plates 41 are connected to form an annular groove.

[0037] As a preferred embodiment, a plurality of balls are rotatably mounted on the bottom of the arc-shaped through groove 410 .

[0038] The present invention provides a construction method for a rotation limiter for a large vertical pipeline, comprising the following steps:

[0039] S1. A rotating device is installed at the lower part of the pipe well 6.

[0040] In this embodiment, the slewing device includes a base plate, a slewing bearing and a support plate. The support plate is arranged above the base plate. The slewing bearing is connected between the support plate and the base plate. The support plate can rotate around the central axis of the slewing bearing.

[0041] S2. Hoist the vertical pipe 5 of the lower layer and place it on the rotating device, so that the rotating device is supported on the lower end of the vertical pipe 5 of the lower layer.

[0042] The vertical pipeline 5 of the lower floor is hoisted and placed on the support plate of the slewing device. When the support plate is rotated, the vertical pipeline of the lower floor can rotate together.

[0043] S3. Install a rotation limiting device on the two opposite side walls of the pipe well 6 so that the outer ring of the bearing 3 of the rotation limiting device abuts against the circumferential surface of the vertical pipe 5 at the lower layer.

[0044] S4, hoisting the vertical pipe 5 of the upper layer so that the vertical pipe 5 of the upper layer is coaxially connected with the vertical pipe 5 of the lower layer.

[0045] S5. Install another rotation limiting device on the opposite side walls of the pipe well 6 so that the outer ring of the bearing 3 of the other rotation limiting device abuts against the circumferential surface of the vertical pipe 5 on the upper layer.

[0046] Another set of rotation limiting devices is arranged above the rotation limiting devices in the vertical pipeline of the lower layer.

[0047] In this embodiment, a set of rotation limiting devices is used to limit the positions of the two layers of vertical pipelines.

[0048] S6. Temporarily weld the vertical pipe 5 of the lower layer to the vertical pipe 5 of the upper layer.

[0049] The two layers of vertical pipes are temporarily fixed by spot welding the welds between the vertical pipes of the lower layer and the vertical pipes of the upper layer.

[0050] S7, while rotating the vertical pipe 5 of the lower layer, welding the weld between the vertical pipe 5 of the lower layer and the vertical pipe 5 of the upper layer.

[0051] By rotating the vertical pipes on the lower layer, the welds are gradually facing the construction workers, so that the construction workers can better face every part of the weld and perform welding, ensuring the welding quality.

[0052] The rotation limit device for large vertical pipelines of the present invention has a hole with a diameter of φ36 mm at the position where the support plate is connected to the fixed shaft, and a circular hole with a diameter of φ20 mm is opened on the other side of the support plate. Bolts are installed in the circular holes to fix the support plate on the bracket.

[0053] By fixing the support plate on the wall bracket of the pipe well using a φ20 round hole, the outer ring of the bearing fits tightly with the circumferential surface of the vertical pipe, and the vertical pipe is limited in the horizontal plane during its rotation to prevent it from lateral deviation.

[0054] The rotation limiting device for a large vertical pipeline of the present invention is simple to manufacture, convenient to assemble, and can be used repeatedly.

[0055] In this embodiment, the bracket includes a U-shaped tube, and a plug-in tube is movably inserted in both ends of the U-shaped tube, and one end of the plug-in tube away from the U-shaped tube is detachably mounted on the wall of the pipe well. Locking pieces are respectively installed at both ends of the U-shaped tube. The locking pieces are used to lock the plug-in tube to lock the depth of the plug-in tube inserted in the two ends of the U-shaped tube, thereby fixing the length of the bracket to adapt to vertical pipes of different diameters.

[0056] The rotation limiting device for a large vertical pipeline of the present invention has a wide range of application scenarios and is not affected by environmental conditions.

[0057] The rotation limit device for large vertical pipelines of the present invention is easy to operate and greatly improves the working efficiency of pipeline back welding compared with conventional pipeline welding methods. The pipeline welding work can be completed more quickly and efficiently, thereby indirectly ensuring the on-site construction quality and construction progress.

[0058] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A rotation limiter for a large vertical pipeline, characterized in that: include: Two brackets, the two brackets are installed on two opposite side walls of the pipe well; A vertically arranged fixed shaft is installed on opposite sides of the two brackets; A bearing is coaxially mounted on the fixed shaft, an outer ring of the bearing abuts against the circumferential surface of the vertical pipe in the pipe well, and a rotating device supported on the lower end of the vertical pipe is installed at the lower part of the pipe well.

2. The rotation limiting device for large vertical pipelines according to claim 1 is characterized in that: The bearings are respectively installed at the upper and lower ends of the fixed shaft.

3. The rotation limiting device for large vertical pipelines according to claim 2 is characterized in that: The bottom and the top of the bracket are respectively connected with support plates, the support plates are connected to the fixed shaft, and the two bearings are respectively against the opposite sides of the two support plates.

4. The rotation limiting device for large vertical pipelines according to claim 1 is characterized in that: It also includes a pipe hoop, which is detachably sleeved on the outside of the vertical pipe. The bottom of the pipe hoop is provided with an annular groove, and the upper ends of the two fixed shafts are slidably arranged in the annular groove.

5. The rotation limiting device for large vertical pipelines according to claim 4 is characterized in that: The pipe clamp includes two arc-shaped plates, the inner arc surfaces of the two arc-shaped plates are arranged opposite to each other, the inner arc surfaces of the two arc-shaped plates enclose a clamping channel for the vertical pipe to pass through, ear plates are formed at the opposite ends of the two arc-shaped plates, the ear plates at the ends of the two arc-shaped plates are detachably connected together by bolts, and an arc-shaped through groove is formed at the bottom of the arc-shaped plate, and the arc-shaped through grooves of the two arc-shaped plates are connected to form the annular groove.

6. The rotation limiting device for large vertical pipelines according to claim 5, characterized in that: A plurality of balls are rotatably mounted on the bottom of the arc-shaped through groove.

7. A construction method for a rotation limiter for a large vertical pipeline according to any one of claims 1 to 6, characterized in that: The following steps are involved: A slewing device is installed at the lower part of the pipe well; Hoisting the vertical pipe of the lower layer and placing it on the rotating device, so that the rotating device is supported on the lower end of the vertical pipe of the lower layer; Installing a rotation limiting device on two opposite side walls of the pipe well so that the outer ring of the bearing of the rotation limiting device abuts against the circumferential surface of the vertical pipe at the lower layer; Lift the vertical pipes on the upper layer so that they are coaxially connected with the vertical pipes on the lower layer; Install another rotation limiting device on the two opposite side walls of the pipe well, so that the outer ring of the bearing of the other rotation limiting device abuts against the circumferential surface of the vertical pipe of the upper layer; Temporarily weld the vertical pipes of the lower layer to the vertical pipes of the upper layer; The welds between the lower vertical pipe and the upper vertical pipe are welded while the lower vertical pipe is rotated.

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