Pressure equalizing metal bellows compensator for full external pressure curved pipe

Abstract

The utility model discloses a full external pressure curved pipe pressure balance formula metal bellows compensator, it includes first external pressure pipeline, first connecting pipeline, elbow connecting pipeline, second connecting pipeline, balance bellow and pull rod, and the inside of both ends department of first external pressure pipeline is provided with a connecting bellow respectively, and first connecting pipeline is used for connecting a connecting bellow and external pipeline, and elbow connecting pipeline is used for connecting another connecting bellow and external pipeline, and the outer wall of elbow connecting pipeline is provided with pressure relief hole, and second connecting pipeline has arc connecting end face, and second connecting pipeline is connected with the outer wall of elbow connecting pipeline through arc connecting end face, and is linked with pressure relief hole, and balance bellow is connected with the other end of second connecting pipeline, and balance bellow is equipped with the head pipeline of cover, and the both ends department of pull rod is provided with a connecting rod respectively, and first connecting pipeline and head pipeline are connected with connecting rod respectively.

Description

Technical Field

[0001] This utility model relates to the technical field of corrugated compensators, specifically to a fully external pressure curved pipe pressure-balanced metal corrugated compensator. Background Technology

[0002] In related technologies, metal corrugation compensation is generally divided into two types: internal pressure and external pressure.

[0003] The internal pressure metal bellows compensator consists of a bellows and two end fittings. The medium being transported passes through the fittings and the inner cavity of the bellows (referred to as internal pressure). Its advantages are simple structure and easy processing. Its disadvantage is that the number of bellows cannot be too many, otherwise it will cause columnar instability of the compensator, thus limiting the displacement capacity of the compensator.

[0004] The external pressure metal bellows compensator consists of a bellows, an outer cylinder, and end fittings. The medium being transported fills the inner cavity of the fittings and the outer side of the bellows (referred to as external pressure). Its structural feature is that an outer cylinder is specially added to the outside of the bellows, so that the medium being transported fills the gap between the bellows and the outer cylinder. The bellows operates under external pressure, and the number of corrugations can be high. The bellows under external pressure does not have the problem of columnar instability, thereby improving the displacement capacity of the compensator.

[0005] However, the two types of metal bellows compensators mentioned above have high internal pressure and low displacement capacity during use. Utility Model Content

[0006] The purpose of this invention is to provide a fully external pressure curved pipe pressure-balanced metal bellows compensator to solve the problems of high internal pressure and low displacement capacity of existing bellows compensators.

[0007] Therefore, embodiments of this utility model propose a fully external pressure curved pipe pressure-balanced metal bellows compensator.

[0008] According to an embodiment of the present invention, a fully external pressure curved pipe pressure-balanced metal bellows compensator includes a first external pressure pipe, a first connecting pipe, an elbow connecting pipe, a second connecting pipe, a balancing bellows, and a tie rod. A connecting bellows is respectively provided on the inner side of both ends of the first external pressure pipe. The first connecting pipe is used to connect one of the connecting bellows to an external pipeline. The elbow connecting pipe is used to connect the other of the connecting bellows to an external pipeline. A pressure relief hole is provided on the elbow connecting pipe. The second connecting pipe has an arc-shaped connecting end face, which is connected to the outer wall of the elbow connecting pipe and communicates with the pressure relief hole. The balancing bellows is connected to the other end of the second connecting pipe. A capped pipe is fitted over the balancing bellows. A connecting rod is provided at both ends of the tie rod, and the first connecting pipe and the capped pipe are respectively connected to the connecting rod.

[0009] In some embodiments, a connecting rod is also provided at the middle section of the pull rod, and the first external pressure pipe is connected to the connecting rod.

[0010] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Other features and aspects of this disclosure will become clearer from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0011] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0012] Figure 1 This is a cross-sectional view of the detection device according to an embodiment of the present utility model.

[0013] Figure label:

[0014] The fully external pressure curved pipe pressure balanced metal bellows compensator 100 includes a first external pressure pipe 10, a connecting bellows 11, a first connecting pipe 20, an elbow connecting pipe 30, a second connecting pipe 40, a balancing bellows 50, a tie rod 60, a connecting rod 61, and a capping pipe 70. Detailed Implementation

[0015] The technical solution of this utility model will be clearly and completely described below with reference to specific implementation schemes. However, those skilled in the art should understand that the implementation schemes described below are only for illustrating this utility model and should not be regarded as limiting the scope of this utility model. Based on the implementation schemes in this utility model, all other implementation schemes obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] like Figure 1 As shown, the fully external pressure curved pipe pressure balanced metal bellows compensator 100 according to an embodiment of the present invention includes a first external pressure pipe 10, a first connecting pipe 20, an elbow connecting pipe 30, a second connecting pipe 40, a balanced bellows pipe 50, and a tie rod 60.

[0017] A connecting corrugated pipe 11 is provided on the inner side of each end of the first external pressure pipe 10. The first connecting pipe 20 is used to connect one connecting corrugated pipe 11 to the external pipeline, and the elbow connecting pipe 30 is used to connect the other connecting corrugated pipe 11 to the external pipeline.

[0018] The elbow connecting pipe 30 is provided with a pressure relief hole (not shown), and the second connecting pipe 40 has an arc-shaped connecting end face. The second connecting pipe 40 is connected to the outer wall of the elbow connecting pipe 30 through the arc-shaped connecting end face and communicates with the pressure relief hole.

[0019] The balance corrugated pipe 50 is connected to the other end of the second connecting pipe 40. The balance corrugated pipe 50 is covered with a head pipe 70. A connecting rod 61 is provided at both ends of the tie rod 60. The first connecting pipe 20 and the head pipe 70 are respectively connected to the connecting rod 61.

[0020] In some embodiments, such as Figure 1 As shown, a connecting rod 61 is also provided in the middle section of the tie rod 60, and the first external pressure pipe 10 is connected to the connecting rod 61.

[0021] In this invention, the fully external pressure curved pipe pressure balance metal bellows compensator utilizes the structural principle of the traditional curved pipe pressure balance metal bellows compensator, replacing its working bellows and balancing bellows with an external pressure bellows compensator. The balance principle of its internal pressure thrust remains unchanged, and the lateral displacement capacity can also be easily achieved by changing the length of the connecting pipe between the two working bellows. Since the bellows adopt an external pressure structure, there is no column instability problem, the number of bellows can be increased or decreased at will, and the axial displacement capacity can be conveniently adjusted according to engineering needs.

[0022] The beneficial effect of this utility model is that it replaces the internal pressure bellows structure used in the traditional curved pipe pressure balance metal bellows compensator with an external pressure bellows structure, combining the internal pressure thrust balance principle of the traditional curved pipe pressure balance metal bellows compensator with the advantages of the external pressure bellows, such as a large number of corrugations and a large displacement, thus broadening the application range of the curved pipe pressure balance metal bellows compensator.

[0023] Compared to traditional curved pipe pressure-balanced metal bellows compensators, this utility model of a fully external pressure curved pipe pressure-balanced metal bellows compensator retains the advantages of the latter, such as no pressure thrust on the equipment inlet and convenient adjustment of lateral displacement capacity. It also allows for easy adjustment of axial displacement capacity, making it more widely applicable to aerospace wind tunnel testing equipment and steam turbine generator pipe interfaces. This improves the stress condition of pipe interfaces and ensures safe equipment operation. Furthermore, the curved pipe pressure-balanced metal bellows compensator can be used in the design and selection of long-arm pipes to protect the safe operation of bends and facilitate the design and construction of pipe supports.

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0029] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A fully external pressure curved pipe pressure-balanced metal bellows compensator, characterized in that, include: The first external pressure pipe has a connecting corrugated pipe installed on the inner side of each end of the first external pressure pipe; A first connecting pipe is used to connect one of the connecting bellows and an external pipeline; An elbow connecting pipe is used to connect another connecting corrugated pipe to an external pipeline, and the elbow connecting pipe is provided with a pressure relief hole; The second connecting pipe has an arc-shaped connecting end face, and the second connecting pipe is connected to the outer wall of the elbow connecting pipe through the arc-shaped connecting end face, and communicates with the pressure relief hole; A balancing bellows, the balancing bellows being connected to the other end of the second connecting pipe, and the balancing bellows being fitted with a capped pipe; A tie rod is provided at both ends of the tie rod, and the first connecting pipe and the end cap pipe are respectively connected to the connecting rod.

2. The fully external pressure curved pipe pressure balanced metal bellows compensator according to claim 1, characterized in that, A connecting rod is also provided at the middle section of the pull rod, and the first external pressure pipe is connected to the connecting rod.

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