Construction method of downward hanging type large-diameter pipeline hanger

Abstract

The invention belongs to the field of pipeline hangers, and provides a construction method of a lower hanging type large-diameter pipeline hanger, which comprises the following steps: S1, connecting a bearing steel channel beam below a cross beam; s2, determining a fixing point of a circular hanging bracket according to the pipeline trend; s3, the bearing steel channel beam is moved upwards to the position above the pipeline; s4, the two ends of the circular hanging bracket are connected to the bottom ends of the bearing steel channel beams, so that the pipeline is stably supported in the circular hanging bracket; and S5, the fastening degree of the high-strength bolts is adjusted. Compared with the prior art, the device has the advantages that the bearing steel channel beam actively moves upwards and is positioned right above the large-diameter pipeline, and then the high-strength bolts are connected with the circular hanging bracket on the lower side to support the pipeline, so that the compression of the overall height of the hanging bracket and the effective release of building clearance are realized in the construction process; and the installation adaptability of the large-diameter pipeline in the low clearance environment is remarkably improved, construction convenience and anti-seismic performance are achieved, and the method can be widely applied to the fields of underground comprehensive pipe galleries, commercial building electromechanical engineering and the like.

Description

Technical Field

[0001] This invention belongs to the field of pipe hangers, and specifically relates to a construction method for a bottom-mounted large-diameter pipe hanger. Background Technology

[0002] In modern large-scale public buildings and underground infrastructure, large-diameter metal pipes (such as DN300~DN1200) are often used for HVAC, water supply and drainage, and fire protection systems. Due to limited building height, the space for mechanical and electrical pipelines is extremely tight. Traditional supports and hangers often use U-shaped clamps or bottom brackets to fix the pipes to the structural beams. This method has obvious drawbacks:

[0003] Traditional pipe supports often adopt the form of "upper suspension and lower support" or "bottom support", that is, the load-bearing beam or support is located below the pipe or at the same height as the pipe. This not only occupies valuable overhead clearance, but also makes it easy to collide with other professional pipelines (such as electrical cable trays and air ducts), leading to repeated design and construction difficulties. Although some patents have attempted to optimize the support structure, such as suspending the pipe through the upper crossbeam, the construction process still cannot effectively solve the problem of the height occupied by the load-bearing structure. In particular, if the position of the load-bearing channel steel beam is not set properly during construction, it will not only fail to release clearance, but also increase the overall height of the support, which violates the original intention of space optimization. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a construction method for a hanging large-diameter pipe hanger that features a simple structure, good stability, increased clearance, and adaptability to thermal displacement.

[0005] The objective of this invention can be achieved by addressing the following technical problem: a construction method for a bottom-mounted large-diameter pipe hanger is proposed, comprising the following steps:

[0006] S1. Position and drill holes on the building beam, and connect the load-bearing steel channel beam below the beam so that the load-bearing steel channel beam is set parallel to the radial direction of the pipe.

[0007] S2. Determine the fixing points of the circular hanger according to the pipeline route;

[0008] S3. Move the load-bearing steel beam above the pipeline to shorten the overall height of the load-bearing steel beam;

[0009] S4. Connect both ends of the circular hanger to the bottom of the load-bearing channel steel beam using high-strength bolts, so that the pipeline is stably supported in the circular hanger.

[0010] S5. Adjust the tightness of the high-strength bolts to ensure that the height of the pipeline centerline is within the standard usage range.

[0011] In the above-mentioned construction method for a bottom-mounted large-diameter pipe hanger, in step S1:

[0012] The load-bearing channel steel beam is welded together from several vertical channel steel hangers and several channel crossbeams.

[0013] In the above-mentioned construction method for a bottom-mounted large-diameter pipe hanger, in step S5:

[0014] The elevation error of the pipeline centerline needs to be controlled within 3mm.

[0015] In the above-mentioned construction method for a bottom-mounted large-diameter pipe hanger, in step S2:

[0016] The circular hanger has a positioning cavity with an opening facing the channel beam, and the bottom sides of the pipe are movably attached to the positioning cavity.

[0017] In the above-mentioned construction method of a bottom-mounted large-diameter pipe hanger, a rubber pad is also added inside the positioning cavity. The rubber pad is used to offset the displacement of the pipe when it expands and contracts due to thermal expansion and contraction.

[0018] In the above-mentioned construction method of a hanging large-diameter pipe hanger, the axial displacement caused by the thermal expansion and contraction of the pipe needs to be controlled within 15mm.

[0019] In the above-mentioned construction method for a bottom-mounted large-diameter pipe hanger, in step S1,

[0020] The load-bearing channel steel beams are made of Q235B hot-rolled channel steel to meet the load requirements of the pipeline.

[0021] In the above-mentioned construction method for a bottom-mounted large-diameter pipe hanger, the tolerance range between the inner diameter of the circular hanger and the outer diameter of the pipe is ±5mm.

[0022] In the above-mentioned construction method of a hanging large-diameter pipe hanger, the vertical channel steel hanger adopts a rear-expanded bottom anchor bolt with a pull-out tensile strength of more than 30KN.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) The present invention provides a construction method for a hanging large-diameter pipe hanger. By actively moving the load-bearing channel steel beam upward and positioning it directly above the large-diameter pipe, and then using high-strength bolts to connect the circular hanger below to support the pipe, a new installation structure system of "load-bearing above and support below" is formed. This achieves compression of the overall height of the hanger and effective release of the building clearance during the construction process, significantly improving the installation adaptability of large-diameter pipes in low-clearance environments. It also has the advantages of convenient construction and seismic performance, and can be widely used in underground integrated pipe corridors, commercial building electromechanical engineering and other fields.

[0025] (2) Adding rubber pads inside the circular hanger can effectively absorb and buffer the displacement caused by thermal expansion and contraction of the pipeline due to temperature changes, and avoid additional stress or damage to the support caused by rigid constraints; the rubber pads also play a role in vibration reduction and noise reduction, and extend the service life of the pipeline and support structure, which is especially suitable for pipeline systems that transport high-temperature or low-temperature media.

[0026] (3) Q235B hot-rolled channel steel is selected as the material for load-bearing channel steel beams. It has good mechanical properties, weldability and cost-effectiveness, and can reliably bear the static and dynamic loads of large-diameter pipes and their internal media. The material is widely available and easy to process, which is conducive to standardized production and on-site construction, taking into account strength, safety and economy. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this application.

[0028] In the diagram, 1 is a crossbeam; 2 is a load-bearing channel steel beam; 20 is a vertical channel steel hanger; 21 is several channel crossbeams; 3 is a pipe; 4 is a circular hanger; 40 is a positioning cavity; and 5 is a high-strength bolt. Detailed Implementation

[0029] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments.

[0030] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0031] like Figure 1 As shown, the present invention discloses a construction method for a bottom-mounted large-diameter pipe hanger, characterized by comprising the following steps:

[0032] S1. Position and drill holes on the building beam 1, and connect the load-bearing steel beam 2 below the beam 1 so that the load-bearing steel beam 2 is set parallel to the radial direction of the pipe 3.

[0033] S2. Determine the fixing point of the circular hanger 4 according to the direction of pipe 3;

[0034] S3. Move the load-bearing steel beam 2 above the pipe 3 to shorten the overall height of the load-bearing steel beam 2;

[0035] S4. Connect the two ends of the circular hanger 4 to the bottom end of the load-bearing channel steel beam 2 using high-strength bolts 5, so that the pipe 3 is stably supported in the circular hanger 4.

[0036] S5. Adjust the tightness of the high-strength bolt 5 so that the height of the center line of the pipe 3 is within the standard range.

[0037] like Figure 1 As shown, this invention significantly improves the installation adaptability of large-diameter pipes 3 in low-clearance environments by placing the load-bearing structure (i.e., the load-bearing channel steel beam) above the pipe 3 and introducing a hanging pipe 3 system. It is worth noting that, due to the certain limitations of the location of the pipe 3, it often needs to meet the corresponding working environment in a specific location. Therefore, compared with the traditional method of lengthening the load-bearing channel to support the pipe 3, this solution sets a load-bearing channel steel beam 2 parallel to the radial direction of the pipe 3 below the building beam 1, and uses an adjustable height circular hanger 4 to hang the large-diameter pipe 3 for support, effectively avoiding the occupation of low space by the traditional method. At the same time, by moving the load-bearing channel steel beam 2 above the pipe 3 and connecting it to the circular hanger 4, the overall hanger height is significantly shortened, and the space occupied at the bottom of the pipe 3 is also directly reduced (the measured clearance is increased by 250±50mm), improving the space utilization rate. In addition, this embodiment also uses high-strength bolts 5 to connect and precisely adjust the centerline height of the pipe 3 to ensure that the installation accuracy of the pipe 3 meets the usage standards, improving construction efficiency and system operation stability.

[0038] In step S1: The load-bearing channel steel beam 2 is welded together from several vertical channel steel hangers 20 and several channel crossbeams 211.

[0039] In this embodiment, the load-bearing channel steel beam 2 is formed by welding vertical channel steel hangers 20 and channel beam 1 to form an integral rigid frame structure. The spatial rigid frame structure formed by the two has higher bending and torsional stiffness compared with a single channel steel. It can not only effectively distribute the concentrated load of large-diameter pipe 3, but also enhance the load-bearing capacity and deformation resistance of the hanger system, avoid local deformation, and is suitable for high-load conditions. Moreover, it is easy to prefabricate in the factory and quickly assemble on site, which improves construction efficiency. Therefore, this structural form can evenly transfer the load of pipe 3 to the building beam 1, avoid local stress concentration, and thus improve the overall structural safety and durability.

[0040] In step S2: a positioning cavity 40 with an opening facing the channel beam 1 is formed inside the circular hanger 4, and the bottom sides of the pipe 3 are movably attached to the positioning cavity 40.

[0041] like Figure 1 As shown, in this embodiment, the arc-shaped sidewall of the positioning cavity 40 forms a double constraint on the pipe 3, which includes lateral limitation and vertical support. When the pipe 3 falls into the cavity, it will automatically be centered on the center line of the hanger, avoiding the eccentric force caused by the rolling of the pipe 3 in traditional flat support plates or open clamps, ensuring that the load is transferred to the upper channel beam 1 in the vertical direction, and improving the structural stability.

[0042] Preferably, in this embodiment, the tolerance range between the inner diameter of the circular hanger 4 and the outer diameter of the pipe 3 is ±5mm. This design is neither the traditional view that the tighter the better, nor the looser the safer, but rather achieves the optimal balance between installability, stability, adaptability, and safety. That is, this tolerance range ensures that the hanger can be smoothly fitted into the pipe 3 for stable support, while avoiding excessive gaps that could cause the pipe 3 to shake or the support to fail. This greatly ensures the fit between the two. In addition, the reasonable tolerance fit takes into account both installation convenience and operational reliability, and is applicable to pipe 3 products with different manufacturing tolerances, improving versatility and adaptability.

[0043] In step S5: the elevation error of the centerline of pipe 3 needs to be controlled within 3mm.

[0044] like Figure 1 As shown, this scheme, while ensuring the overall stability of the circular hanger 4, requires strict control of the elevation error of the centerline of pipe 3 to ≤3mm. For example, HVAC and water supply and drainage pipes 3 often need to meet specific slopes (e.g., drainage pipes ≥0.5%, chilled water pipes to prevent air blockage). This elevation control within this range ensures a continuous slope throughout the pipeline, without backslope or local high points. Therefore, this design standard significantly improves the installation accuracy of the pipe 3 system, which is beneficial for ensuring subsequent equipment connection, smooth medium flow, and system sealing performance, reducing the risk of stress concentration or interface leakage caused by elevation deviation. It is especially suitable for industrial pipe 3 systems with high installation accuracy requirements. It should be noted that the bolts can be tightened after pipe 3 is in place to facilitate subsequent full-load testing (1.5 times the design load for 24 hours).

[0045] A rubber pad is also added inside the positioning cavity 40 to offset the displacement of the pipe 3 during thermal expansion and contraction.

[0046] When pipe 3 expands and contracts due to temperature changes, the rubber pad (not shown in the figure) in this design can absorb these displacements through its elastic deformation, thus avoiding stress concentration on the metal components. The presence of the rubber pad also reduces rigid contact between pipe 3 and the metal bracket, lowering the risk of metal fatigue caused by repeated thermal cycling and extending the service life of the entire system. In summary, the rubber pad effectively absorbs and buffers the thermal expansion and contraction displacement of pipe 3 caused by temperature changes, avoiding additional stress or bracket damage caused by rigid constraints. Simultaneously, the rubber pad also reduces vibration and noise, extending the service life of pipe 3 and its supporting structure, making it particularly suitable for pipe 3 systems transporting high-temperature or low-temperature media. This design not only utilizes the positioning cavity 40 to ensure rapid alignment of pipe 3 during installation and reliable anti-detachment during operation, but also cleverly accommodates thermal displacement requirements while optimizing the mechanical transmission path. This structural detail is one of the key innovations of this invention in achieving high safety, high precision, and high adaptability in installation, possessing outstanding practical value and engineering promotion significance.

[0047] Furthermore, the axial displacement of pipe 3 during thermal expansion and contraction needs to be controlled within 15mm. This ensures the free expansion and contraction capability of pipe 3 under normal temperature change conditions, while also preventing support failure or instability of pipe 3 due to excessive displacement. This limit, combined with the rubber pad design, ensures safety while also taking into account economy and practicality, meeting the actual needs of the project.

[0048] In step S1, this scheme selects Q235B hot-rolled channel steel as the material for the load-bearing channel steel beam 2. It has good mechanical properties, weldability and cost-effectiveness, and can reliably bear the static and dynamic loads of large-diameter pipe 3 and its internal medium. The material is widely available and easy to process, which is conducive to standardized production and on-site construction, taking into account strength, safety and economy.

[0049] The vertical channel steel hanger 20 in this scheme adopts a rear-expanded bottom anchor bolt, which has a pull-out tensile strength of over 30KN, significantly better than ordinary expansion bolts. It can effectively resist the upward pull-out force caused by dynamic loads such as pipeline vibration. The rear-expanded bottom anchor bolt forms a mechanical locking key with the concrete substrate, and the anchoring performance is stable and reliable. It is suitable for heavy pipeline support systems with high safety levels, and greatly improves the safety redundancy of the overall structure.

[0050] This invention proposes an innovative under-mounted large-diameter pipe hanger structure and its supporting construction method, aiming to systematically solve the three core problems of limited clearance, thermal displacement constraints, and construction complexity. It provides a safe, efficient, and sustainable technical path for laying pipes (suitable for basements, etc.) in low-clearance environments. The optimized structure increases the clearance height by 200-300mm while ensuring the stability of the pipe.

[0051] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0053] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A construction method for a bottom-mounted large-diameter pipe hanger, characterized in that, Including the following steps: S1. Position and drill holes on the building beam, and connect the load-bearing steel channel beam below the beam so that the load-bearing steel channel beam is set parallel to the radial direction of the pipe. S2. Determine the fixing points of the circular hanger according to the pipeline route; S3. Move the load-bearing steel beam above the pipeline to shorten the overall height of the load-bearing steel beam; S4. Connect both ends of the circular hanger to the bottom of the load-bearing channel steel beam using high-strength bolts, so that the pipeline is stably supported in the circular hanger. S5. Adjust the tightness of the high-strength bolts to ensure that the height of the pipeline centerline is within the standard usage range.

2. The construction method of a bottom-mounted large-diameter pipe hanger according to claim 1, characterized in that, In step S1: The load-bearing channel steel beam is welded together from several vertical channel steel hangers and several channel crossbeams.

3. The construction method of a bottom-mounted large-diameter pipe hanger according to claim 1, characterized in that, In step S5: The elevation error of the pipeline centerline needs to be controlled within 3mm.

4. The construction method of a bottom-mounted large-diameter pipe hanger according to claim 2, characterized in that, In step S2: The circular hanger has a positioning cavity with an opening facing the channel beam, and the bottom sides of the pipe are movably attached to the positioning cavity.

5. The construction method of a bottom-mounted large-diameter pipe hanger according to claim 4, characterized in that, A rubber pad is also provided inside the positioning cavity to offset the displacement of the pipe during thermal expansion and contraction.

6. The construction method of a bottom-mounted large-diameter pipe hanger according to claim 5, characterized in that, The axial displacement caused by the thermal expansion and contraction of the pipeline needs to be controlled within 15mm.

7. The construction method of a bottom-mounted large-diameter pipe hanger according to claim 1, characterized in that, In step S1, The load-bearing channel steel beams are made of Q235B hot-rolled channel steel to meet the load requirements of the pipeline.

8. The construction method of a bottom-mounted large-diameter pipe hanger according to claim 4, characterized in that, The tolerance range between the inner diameter of the circular hanger and the outer diameter of the pipe is ±5mm.

9. A construction method for a bottom-mounted large-diameter pipe hanger according to claim 2, characterized in that, The vertical channel steel hanger uses rear-expanded bottom anchor bolts with a pull-out tensile strength of over 30KN.

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