CN207316309U - A kind of connection structure of Subway Tunnel fire main - Google Patents

Abstract

The utility model discloses a kind of connection structure of Subway Tunnel fire main, it is characterised in that:Arranged between the pipeline in angle, the angle arrangement is to set flexible clip to realize that the sum of angle of several pipeline enclosures matches with tunnel radian by the junction between the pipeline.The utility model has the advantages that：The connection structure of the pipeline can make whole fire main all possess certain counter-bending and shock resistance, reduce the problem of due to tunnel bending or vibrations generation moment of torsion whole pipeline leak or even booster occur for fire-fighting pressure pipeline, and greatly reduce the ageing rate of firemain system in tunnel, avoid risk for whole metro industry operation, and produce certain economic benefit.

Description

A kind of connection structure of Subway Tunnel fire main

Technical field

This practicality belongs to the electromechanical installation industry of subway, and in particular to a kind of connection structure of Subway Tunnel fire main.

Background technology

The installation of running tunnel fire main uses traditional rigid clamp connection in the domestic electromechanical installation industry of subway at present, Whole pipeline into rigid state, whole pipeline especially pipe connection portion position cambered and climb discontinuity in descending grade tunnel, Rigid clip refers to that clamp connection part does not possess flexibility in itself, is only subject to lateral tensile force and longitudinal pressure；Flexible conduit is installed The industries such as mining industry, natural gas, chemical industry have been successfully applied at home, but fire-fighting specialty not yet obtains in subway tunnel section Using flexible clip refers to that while lateral tensile force and longitudinal pressure is born, can also bearing less transverse direction, there are angle The power of degree, external flexible conduit application field is also very extensive, but not yet widelys popularize and apply for metro industry.

The content of the invention

The purpose of this utility model is according to above-mentioned the deficiencies in the prior art, there is provided a kind of company of Subway Tunnel fire main Binding structure, the radian for being produced tunnel structure by flexible clip are effectively decomposed in whole pipe-line system, solved in tunnel The problem of firemain system bending causes pipeline unbalance stress.

The utility model aim is realized and completed by following technical scheme：

A kind of connection structure of Subway Tunnel fire main, for the fire main to being fixedly mounted on tunnel inner wall into Row connection, the fire main are made of the splicing of several pipelines, it is characterised in that：Arranged between the pipeline in angle, institute It is to set flexible clip to realize by the junction between the pipeline to state angle arrangement, the angle of several pipeline enclosures The sum of match with tunnel radian.

Continuous two and the more than two pipeline junction setting flexible clips on the fire main.

Flexible clip described in each pipeline junction arranged for interval on the fire main and rigid clip.

The both sides of the flexibility clip set fixing bracket, and the pipeline is fixedly mounted on described by the fixing bracket On tunnel inner wall.

The fixing bracket includes U-shaped anchor ear, support plate and bottom plate, and the U-shaped anchor ear is connected with the support plate, described Pipeline is spacing to be fixed between the U-shaped anchor ear and the support plate, and the support plate is fixedly connected with the bottom plate, the bottom Plate is fixedly connected by connector with the tunnel inner wall.

The utility model has the advantages that：The connection structure makes what fire-fighting flexible conduit system in tunnel produced tunnel structure Radian is effectively decomposed in whole pipe-line system, has the ability for bearing certain end load, also makes whole curved pipeline all There is axial displacement and corner, whole pipeline is all possessed certain counter-bending and shock resistance, reduce fire-fighting pressure The problem of due to tunnel bending or vibrations generation moment of torsion whole pipeline leak or even booster occur for hydraulic piping；Due to flexible conduit System uniform force, junction drop significantly there is no the problems such as pipe joint deformation caused by rigidity extruding and damaged sealing ring The ageing rate of firemain system in low tunnel, avoids risk for whole metro industry operation, and produces certain economic effect Benefit.

Brief description of the drawings

Fig. 1 is design radian overall variation schematic diagram in the transit tunnel used in the utility model；

Fig. 2 is the interval pipelines angle schematic diagram of the utility model；

Fig. 3 is the new middle fixed -piping rack assumption diagram of this example；

Fig. 4 is the sectional view of flexible clip in the utility model；

Fig. 5 is the use state diagram of flexible clip in the utility model.

Embodiment

The utility model feature and other correlated characteristics are described in further detail by embodiment below in conjunction with attached drawing, In order to the understanding of technical staff of the same trade：

As shown in Figs. 1-5, figure label 1-8 is expressed as：It is section 1, pipeline 2, fixing bracket 3, flexible clip 4, U-shaped Anchor ear 5, support plate 6, bottom plate 7, expansion anchor 8.

Embodiment：As shown in Figure 1, subway line is made of some sections 1, it is two neighboring according to the design of subway line Often with cambered between section 1.The connection structure of Subway Tunnel fire main in the present embodiment is used for being fixedly mounted on tunnel Fire main on road inner wall is attached, and especially the fire main between the section 1 with radian is attached.Fire-fighting Pipeline is made of the splicing of several pipelines 2, and the junction between adjacent channel 2 sets flexible clip 4 to make adjacent channel 2 and pipe Angle arrangement is formed between road 2, the arrangement of flexible clip can be various in the pipeline, can at continuous two or More than two 2 junctions of pipeline set flexible clip 4, secondly, flexible clip 4 are respectively arranged in the pipeline and rigidity is blocked Hoop, and flexible clip 4 and the spaced apart mode of rigid clip are taken, as shown in Figure 2 so that several pipes in the section 1 The sum of angle between road 2 matches with tunnel radian, is effectively decomposed whole so as to fulfill the radian for producing tunnel structure In fire main, solve the problems, such as pipeline unbalance stress of the fire main caused by bending in tunnel.

Connection structure in the present embodiment is realized in arrangement by following work step：

1st, circuit angle calculation：Tunnel floor plan is searched according to design drawing, the circuit in tunnel is marked on drawing Angle, and make a record and count.

Radian, section 1 as shown in Figure 1, according to the circle formed between section 1 and section 1 are designed in transit tunnel Arc perimeter L, tunnel radius R, the angle W according to corresponding to formula W=L180 °/π R calculate the section circular arc.

2nd, the flexible distribution of clip 4 calculates：According to 4 product performance of circuit angle calculation result and flexible clip, calculate one by one 4 quantity of flexible clip needed for each position.As shown in Figure 4 and Figure 5, flexible clip 4 can make to produce any direction between pipeline 2 Axial deflection, including Fig. 5（a）It is shown to upward deflect and Fig. 5（b）Shown deflects down, so that between completing pipeline 2 Angle is arranged.

Specifically, first, with reference in the length computation of the section circular arc perimeter L and single pipe 2 to be placed section 1 2 quantity of pipeline and corresponding clip total quantity.Then, the angle W and flexibility with reference to corresponding to counted circular arc in step 1 The safety of clip 4 can distortion angle calculate needed for flexible clip 4 quantity so that by tunnel structure produce radian effectively Decompose in whole fire main.In addition to flexible clip 4, remaining pipeline clamp can use rigid clip, rigid clip Quantity subtract the quantity of flexible clip for clip total quantity.

For example, a tunnel radius R=612.6m, its section circular arc perimeter L=140.159m, the corresponding angle of the circular arc W=13.109 ° are calculated to obtain according to formula W=L180 °/π R.Calculated according to 2 length of single pipe for 6m, clip total quantity N1= 140.159/6=23.According to flexible clip safety can distortion angle be 1 ° of calculating, then flexible clip quantity N2=13.109 °/ 1 °=13.109, at this time in order to ensure that the radian that tunnel structure produces decomposes completely, flexible clip quantity rounds up as 14 It is a.Remaining 9 clips can use rigid clip, its position is designed according to actual conditions.

3rd, the installation of pipeline 2 and fixing bracket 3：

In the both sides mounting and fixing bracket 3 of each flexible clip 4, the fixing bracket 3 as shown in Figure 3 include U-shaped anchor ear 5, Support plate 6 and bottom plate 7, the U-shaped anchor ear 5 add plain cushion and spring pad to be connected, will manage with support plate 6 by double nut or single nut Road 2 is spacing to be fixed between U-shaped anchor ear 5 and support plate 6, and support plate 6 is fixedly connected with bottom plate 7, two positions up and down of bottom plate 7 It is fixedly connected by expansion anchor 8 with tunnel inner wall, anchoring piece is using plain cushion, the double pad fastenings of spring pad.As shown in figure 3, propping up Diagonal brace is provided between fagging 6 and bottom plate 7, to improve support force of the support plate 6 to pipeline 2, so as to ensure that firm supporting is stablized.

4th, pipeline installation and pipeline experiment：

The pipeline 2 that pipeline installation refers to process is fixed on the fixing bracket 3 of pipeline 2 according to design requirement, pipeline 2 Double nut or single nut is needed to add plain cushion and spring pad when being fixed, and installed with U-shaped anchor ear 5 between fixing bracket 3.

Pipeline experiment carries out pressure testing after referring to pipeline 2 installation is complete to pipeline, and line pressure is set according to design load It is fixed, involved in pipeline to valve need to march into the arena again when do valve strength test and leak test, experiment process is according to specification Perform, and only the valve of pass the test just allows to be installed on pipeline.

Need to carry out flushing of pipeline and mark according to design requirement after the completion of pipeline experiment, after the completion of start according to the rules under One step process and experiment.

The present embodiment is in the specific implementation：Fixing bracket 3 is installed at the both sides 250mm positions of each flexible clip 4, Wherein, fixing bracket 3 uses specification to be fixed for the expansion anchor of Φ 12mm, and fixing bracket 3 and its accessory must use galvanizing Material, and Zinc Coating Thickness must not be less than 65 μm.Pipeline 2 employed in the present embodiment is needed before installation steps by processing, The processing of pipeline 2 is divided into 2 port indent of pipeline and pipeline 2 is cut, and 2 port indent of pipeline refers to according to flexible 4 product performance of clip Determine port indent depth and width, pipeline 2 is cut, and is to determine cleavage according to tunnel radian and flexible 4 products characteristics of clip Put.

Although the design to the utility model aim and embodiment elaborate above example referring to the drawings, But those skilled in the art will realize that in the case where limiting the precondition of scope without departing from claim, still may be used To make various modifications and variations to the utility model, such as size of pipeline 2, the safety of flexible clip 4 can distortion angles；Therefore Do not repeat one by one herein.

Claims (5)

1. A kind of 1. connection structure of Subway Tunnel fire main, for being carried out to the fire main being fixedly mounted on tunnel inner wall Connection, the fire main are made of the splicing of several pipelines, it is characterised in that：Arranged between the pipeline in angle, it is described Angle arrangement is to set flexible clip to realize by junction between the pipeline, the angles of several pipeline enclosures it Match with tunnel radian.
2. A kind of 2. connection structure of Subway Tunnel fire main according to claim 1, it is characterised in that：The extinguishing pipe Continuous two and the more than two pipeline junction setting flexible clips on road.
3. A kind of 3. connection structure of Subway Tunnel fire main according to claim 1, it is characterised in that：The extinguishing pipe Flexible clip described in each pipeline junction arranged for interval on road and rigid clip.
4. A kind of 4. connection structure of Subway Tunnel fire main according to claim 1, it is characterised in that：The flexible card The both sides of hoop set fixing bracket, and the pipeline is fixedly mounted on the tunnel inner wall by the fixing bracket.
5. A kind of 5. connection structure of Subway Tunnel fire main according to claim 1, it is characterised in that：The fixed branch Frame includes U-shaped anchor ear, support plate and bottom plate, and the U-shaped anchor ear is connected with the support plate, the pipeline is spacing be fixed on it is described Between U-shaped anchor ear and the support plate, the support plate is fixedly connected with the bottom plate, the bottom plate by connector with it is described Tunnel inner wall is fixedly connected.