CN216344305U - Constant-force hanging bracket for high-pressure water supply pipeline of thermal power plant - Google Patents
Constant-force hanging bracket for high-pressure water supply pipeline of thermal power plant Download PDFInfo
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- CN216344305U CN216344305U CN202121955755.9U CN202121955755U CN216344305U CN 216344305 U CN216344305 U CN 216344305U CN 202121955755 U CN202121955755 U CN 202121955755U CN 216344305 U CN216344305 U CN 216344305U
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Abstract
The utility model discloses a constant force hanging bracket for a high-pressure water supply pipeline of a thermal power plant, which belongs to the technical field of pipeline supporting and hanging brackets. According to the utility model, an auxiliary spring is added in the original spring cylinder body, so that extra output load is provided, and in the actual selection process, the matching of the weight increase of the pipeline and the actual output load of the constant-force hanger can be realized only by selecting the auxiliary spring with proper rigidity according to the weight increase rate of the pipeline. Compared with the original constant-force hanging bracket, the structure change is small, and the manufacture is simple.
Description
Technical Field
The utility model relates to a constant-force hanging bracket for a high-pressure water supply pipeline of a thermal power plant, belongs to the technical field of pipeline hanging brackets, and can be widely applied to the fields of pipeline systems of electric power, petrochemical industry and the like and related equipment.
Background
The constant-force hanger is widely applied to the electric power and chemical industry and is mainly used for bearing pipelines and equipment structures, and is mainly characterized in that the theoretical output load of the constant-force hanger is always kept constant within a design displacement range, so that additional stress cannot be brought to the pipelines and the equipment, and the constant degree of the constant-force hanger is required to be within 6% in relevant standards (NB/T47038-.
For a high-pressure water supply pipeline of a thermal power plant, a constant-force hanging bracket must be used at a position with large thermal displacement, but because of the weight of the water medium, the total weight of a pipeline system in the operation stage can be increased by more than ten percent, and at the moment, if the constant-force hanging bracket with completely constant output load is still used, the bearing capacity of a corresponding hanging point is insufficient, so that the stress level of a nearby port is improved, and the safe and stable operation of the pipeline is not facilitated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide the constant-force hanging bracket for the high-pressure water supply pipeline, which has a simple and reliable structure and is convenient to manufacture. An auxiliary spring is added in an original spring barrel, so that extra output load is provided, and the auxiliary spring with proper rigidity is selected according to the increase rate of the weight of the pipeline in the actual selection process.
The technical scheme adopted by the utility model for solving the problems is as follows: a constant-force hanger of a high-pressure water supply pipeline of a thermal power plant comprises a constant-force hanger component, an auxiliary spring supporting seat and an auxiliary spring, wherein the constant-force hanger component is of an existing structure and comprises an outer frame, an operation mechanism, a hanging rod, a bearing spring, a spring pull rod, a spring cylinder, a spring pressing plate and a hexagon nut; the operation mechanism is arranged in the outer frame, the suspender is connected with the operation mechanism, the spring barrel is connected to the lower end of the outer frame, the force bearing spring is installed in the spring barrel, the spring pressing plate is arranged at the bottom of the force bearing spring, the spring pull rod penetrates through the spring pressing plate and the force bearing spring and is connected to the operation mechanism, and the spring pull rod is locked with the spring pressing plate through a hexagon nut; the method is characterized in that: the auxiliary spring supporting seat is coaxially arranged inside the spring cylinder body and is welded and fixed on the outer frame; the auxiliary spring supporting seat comprises a cylinder body and a top plate, the top plate is welded inside the cylinder body, the auxiliary spring is installed inside the spring cylinder body, and the auxiliary spring and the bearing spring are coaxially arranged; one end of the auxiliary spring is in contact with the spring pressing plate, and the other end of the auxiliary spring is in contact with the top plate.
Further, the stiffness K = α K of the auxiliary spring1Delta/delta. Wherein alpha is the weight increase rate of the pipeline system in the operation thermal state; k1The rigidity of the bearing spring; delta is the initial compression of the bearing spring, namely the compression of the bearing spring when the constant-force hanger assembly is positioned at the upper limit; delta is the deformation of the bearing spring in the whole displacement stroke.
Further, when the constant-force hanger assembly is in an upper limit position, the auxiliary spring is in a free height state, namely, the distance t = L from the top plate to the upper end face of the cylinder body1-L2- Δ. Wherein L is1The free height of the bearing spring is set; l is2To assist the free height of the spring.
Further, the inner diameter of the cylinder body is equal to the outer diameter of the auxiliary spring.
Furthermore, the constant-force hanger assembly can be suitable for one of a vertical constant-force hanger and a flat constant-force hanger, and is wide in application range.
Furthermore, the constant-force hanger assembly can be suitable for one of a three-connecting-rod constant-force hanger and a four-connecting-rod constant-force hanger, and is wide in application range.
Compared with the prior art, the utility model has the following advantages and effects:
1. the output load of the constant-force hanger in the whole displacement stroke is quantitatively increased, and the stress level of the corresponding pipeline in the operation stage is prevented from being improved; 2. only need increase a set of auxiliary spring in original gallows structure, the structural change is little, simple manufacture.
Drawings
Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention.
Fig. 2 is an exploded view illustrating the installation of the auxiliary spring according to the embodiment of the present invention.
In the figure: the constant-force hanger assembly comprises a constant-force hanger assembly 1, an outer frame 11, an operation mechanism 12, a hanger rod 13, a force bearing spring 14, a spring pull rod 15, a spring cylinder 16, a spring pressing plate 17, a hexagonal nut 18, an auxiliary spring supporting seat 2, a cylinder 21, a top plate 22 and an auxiliary spring 3.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Examples are given.
Referring to fig. 1 to 2, in the embodiment, the constant-force hanger for the high-pressure water supply pipeline of the thermal power plant includes a constant-force hanger assembly 1, an auxiliary spring support seat 2 and an auxiliary spring 3, where the constant-force hanger assembly 1 is an existing structure and includes an outer frame 11, an operating mechanism 12, a hanger rod 13, a force-bearing spring 14, a spring pull rod 15, a spring cylinder 16, a spring pressing plate 17 and a hexagon nut 18; the operation mechanism 12 is arranged in the outer frame 11, the hanger rod 13 is connected with the operation mechanism 12, the spring cylinder 16 is connected with the lower end of the outer frame 11, the force bearing spring 14 is arranged in the spring cylinder 16, the spring pressing plate 17 is arranged at the bottom of the force bearing spring 14, the spring pull rod 15 penetrates through the spring pressing plate 17 and the force bearing spring 14 to be connected to the operation mechanism 12, and the spring pull rod 15 is locked with the spring pressing plate 17 through the hexagon nut 18; the method is characterized in that: the auxiliary spring support seat 2 is coaxially arranged inside the spring cylinder 16 and is welded and fixed on the outer frame 11; the auxiliary spring support seat 2 comprises a cylinder body 21 and a top plate 22, the top plate 22 is welded in the cylinder body 21, the inner diameter of the cylinder body 21 is equal to the outer diameter of the auxiliary spring 3, the auxiliary spring 3 is arranged in the spring cylinder body 16, and the auxiliary spring 3 and the force bearing spring 14 are coaxially arranged; one end of the assist spring 3 is in contact with the spring holding plate 17, and the other end of the assist spring 3 is in contact with the top plate 22.
Specifically, the stiffness K = α K of the auxiliary spring 31Delta/delta. Wherein alpha is the weight increase rate of the pipeline system in the operation thermal state; k1The stiffness of the bearing spring 14; delta is the initial compression of the bearing spring 14, namely the compression of the bearing spring 14 when the constant-force hanger component 1 is at the upper limit position; δ is the amount of deformation of the carrier spring 14 throughout the displacement stroke.
When the constant force hanger assembly 1 is at the upper limit, the auxiliary spring 3 is in a free height state, that is, the distance t = L from the top plate 22 to the upper end surface of the cylinder 211-L2- Δ. Wherein L is1The free height of the bearing spring 14; l is2To assist the free height of the spring 3.
In a certain 600MW supercritical thermal power generating unit, the specification of a high-pressure water supply pipeline is phi 508mm multiplied by 50mm, the design temperature is 303 ℃, the design pressure is 34.0MPa, a group of constant-force hanging frames are arranged on the interface end of an economizer, and the original design model determined according to the cold state hanging zero principle is LE 48-130/53488X-M36.
A design stage: the calculation shows that the mass increase rate of the whole pipeline line is alpha =16% due to the weight of the aqueous medium when the pipeline is in a hot state. According to the design model of the original hanger, the stiffness K of the bearing spring 141=145.4N/mm, the initial compression amount Δ =269mm of the force-bearing spring 14, and the deformation amount δ =160mm of the force-bearing spring 14 in the entire displacement stroke. The stiffness K = α K of the auxiliary spring 3 can be calculated1Δ/δ = 39.1N/mm. Selecting a meter according to the spring, wherein the free height L of the bearing spring 141=1100mm, height L of auxiliary spring 3 free2=527mm, and the outer diameter of the assist spring 3 is 190mm, the distance t = L from the top plate 22 to the upper end surface of the cylinder 21 can be determined therefrom1-L2- Δ =304mm, while it is clear that the inner diameter of the cylinder 21 is 200 mm.
The manufacturing stage comprises: in the original manufacturing process of the constant-force hanger assembly 1, firstly, the auxiliary spring support seat 2 is welded and fixed on the lower side of the outer frame 11, and then the spring cylinder 16 is welded and fixed on the lower side of the outer frame 11; then an auxiliary spring 3 and a bearing spring 14 are sequentially arranged; and finally, a spring pressing plate 17 penetrates through the spring pull rod 15 to be pressed on the end surfaces of the bearing spring 14 and the auxiliary spring 3, and is screwed and locked by a hexagonal nut 18.
Those not described in detail in this specification are well within the skill of the art.
And will be apparent to those skilled in the art from the foregoing description.
In addition, it should be noted that the above contents described in the present specification are only illustrations of the structures of the present invention. All equivalent variations of the structures, features and principles described in accordance with the present inventive concepts are included within the scope of the present invention. Those skilled in the art to which the utility model relates will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the utility model as disclosed in the accompanying claims.
Claims (4)
1. A constant-force hanger of a high-pressure water supply pipeline of a thermal power plant comprises a constant-force hanger component (1), an auxiliary spring supporting seat (2) and an auxiliary spring (3), wherein the constant-force hanger component (1) comprises an outer frame (11), an operation mechanism (12), a hanging rod (13), a force bearing spring (14), a spring pull rod (15), a spring cylinder (16), a spring pressing plate (17) and a hexagon nut (18); the operation mechanism (12) is arranged in the outer frame (11), the hanger rod (13) is connected with the operation mechanism (12), the spring cylinder (16) is connected to the lower end of the outer frame (11), the bearing spring (14) is installed in the spring cylinder (16), the spring pressing plate (17) is arranged at the bottom of the bearing spring (14), the spring pull rod (15) penetrates through the spring pressing plate (17) and the bearing spring (14) and is connected to the operation mechanism (12), and the spring pull rod (15) is locked with the spring pressing plate (17) through a hexagon nut (18); the method is characterized in that: the auxiliary spring support seat (2) is coaxially arranged inside the spring cylinder body (16) and is welded and fixed on the outer frame (11); the auxiliary spring supporting seat (2) comprises a cylinder body (21) and a top plate (22), the top plate (22) is welded in the cylinder body (21), the auxiliary spring (3) is installed in the spring cylinder body (16), and the auxiliary spring (3) and the force bearing spring (14) are coaxially arranged; one end of the auxiliary spring (3) is in contact with the spring pressing plate (17), and the other end of the auxiliary spring (3) is in contact with the top plate (22).
2. The constant-force hanger for the high-pressure water supply pipeline of the thermal power plant as claimed in claim 1, wherein: the stiffness K = α K of the auxiliary spring (3)1Delta/delta; wherein alpha is the rate of weight increase of the piping system when operating in the hot state; k1The rigidity of the bearing spring (14); delta is the initial compression amount of the bearing spring (14), namely the compression amount of the bearing spring (14) when the constant-force hanger component (1) is positioned at the upper limit position; delta is the deformation of the bearing spring (14) in the whole displacement stroke.
3. The constant-force hanger for the high-pressure water supply pipeline of the thermal power plant as claimed in claim 2, wherein: when the constant force hanger assembly (1) is in an upper limit state, the auxiliary spring (3) is in a free height state, namely the distance t = L from the top plate (22) to the upper end face of the cylinder body (21)1-L2- Δ; wherein L is1Is the free height of the bearing spring (14); l is2To assist the free height of the spring (3).
4. The constant-force hanger for the high-pressure water supply pipeline of the thermal power plant as claimed in claim 1, wherein: the inner diameter of the cylinder (21) is equal to the outer diameter of the auxiliary spring (3).
Priority Applications (1)
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CN202121955755.9U CN216344305U (en) | 2021-08-19 | 2021-08-19 | Constant-force hanging bracket for high-pressure water supply pipeline of thermal power plant |
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CN202121955755.9U CN216344305U (en) | 2021-08-19 | 2021-08-19 | Constant-force hanging bracket for high-pressure water supply pipeline of thermal power plant |
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CN216344305U true CN216344305U (en) | 2022-04-19 |
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CN202121955755.9U Active CN216344305U (en) | 2021-08-19 | 2021-08-19 | Constant-force hanging bracket for high-pressure water supply pipeline of thermal power plant |
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2021
- 2021-08-19 CN CN202121955755.9U patent/CN216344305U/en active Active
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