Special-shaped large-caliber low-vacuum split type expansion joint and connecting structure

Abstract

According to the special-shaped large-diameter low-vacuum split type expansion joint and the connecting structure, the expansion joint comprises the corrugated pipe center support, the first corrugated pipe, the second corrugated pipe, the first special-shaped annular plate, the second special-shaped annular plate and the multiple connecting assemblies, so that the expansion joint can be connected with special-shaped pipelines on the two sides in a sealed and stable mode; therefore, the overall mechanical property and attractiveness of the large and long pipeline in a low-vacuum environment are ensured; meanwhile, the expansion joint can be designed to be of a split structure, on one hand, manufacturing, loading, unloading, transportation and installation in a factory are facilitated, and on the other hand, on the premise that the sealing performance of the expansion joint is guaranteed, the transverse and vertical displacement flexibility of the expansion joint is improved; the structure, the principle and the like of the expansion joint can be widely applied to design and manufacturing of expansion joints with any section size, and compared with a traditional integrated expansion joint, the expansion joint is simple in structure, convenient to machine and manufacture and low in machining cost.

Description

Technical Field

[0001] The invention belongs to the technical field of non-standard machinery, and in particular relates to a special-shaped large-diameter low-vacuum split expansion joint and a connection structure. Background Art

[0002] The vacuum tube high-speed train is a new transportation system that uses large-diameter vacuum tubes as carriers, uses superconducting magnetic levitation technology to achieve train separation from the ground, thereby eliminating friction resistance, and uses internal near-vacuum pipeline lines to greatly reduce air resistance, ultimately achieving a theoretical train speed of more than 1,000 km / h. At present, expansion joints are mostly used to connect the main sections of long-distance low-vacuum pipelines. Regarding the related technologies of special-shaped large-diameter low-vacuum split expansion joints, the current representative patents mainly include the following aspects:

[0003] The patent "A reinforced structure and expansion joint for reducing the stress of the load-bearing components at the end of the expansion joint (patent number CN219120078U)" provides a reinforced structure and expansion joint for reducing the stress of the load-bearing components at the end of the expansion joint. This structure adopts a single bellows, which is not conducive to the lateral and vertical displacement transmission; the patent "A compound axial expansion joint with a pull rod (patent number CN203718257U)" discloses a compound axial expansion joint with a pull rod, which can effectively prevent the internal bellows from being deformed by force and can also prevent the damage to itself by the additional blind plate force; but once this type of expansion joint is made into a large size, it will lead to insufficient overall rigidity, and at the same time, the processing cost and welding precision control requirements are relatively high. The patent "Rectangular expansion joint (patent number CN203500754U)" discloses a holding expansion joint, the principle and structure of the device are simple, but the sealing is unreliable, and the paint may cause aging of the sealing material when exposed to the outdoors for a long time, which affects the overall vacuum sealing performance, and the replacement of the sealing medium is large, which indirectly increases the maintenance cost of the product.

[0004] Based on the above-mentioned prior art, in order to ensure the vacuum sealing performance and environmental adaptability of the low vacuum pipeline and reduce the construction cost, there is an urgent need for a special-shaped large-diameter low vacuum split expansion joint. Summary of the invention

[0005] The present invention aims to solve at least one of the problems existing in the prior art.

[0006] To this end, the present invention provides a special-shaped large-diameter low-vacuum split expansion joint and a connection structure.

[0007] The technical solution of the present invention is:

[0008] According to one aspect, a special-shaped large-diameter low-vacuum split expansion joint is provided, which includes a bellows center bracket, a first bellows, a second bellows, a first special-shaped ring plate, a second special-shaped ring plate and a plurality of connecting components, wherein: the bellows center bracket is an annular structure, the first bellows and the second bellows are arranged on the left and right sides of the bellows center bracket, and are both fixedly connected to the bellows center bracket, and the first bellows and the second bellows are connected; the first special-shaped ring plate and the second special-shaped ring plate both have special-shaped through holes, the first special-shaped ring plate is arranged on the side of the first bellows away from the bellows center bracket and is fixedly connected to the side, the second special-shaped ring plate is arranged on the side of the second bellows away from the bellows center bracket and is fixedly connected to the side, and the two through holes are connected to the first bellows and the second bellows through holes; a plurality of connecting components are arranged at intervals along the circumference of the first special-shaped ring plate and the second special-shaped ring plate, and the connecting components are used to fix the first special-shaped ring plate and the second special-shaped ring plate.

[0009] Furthermore, the connecting assembly includes a supporting stud and two hexagonal nuts. Corresponding circular holes are opened on the outer sides of the first special-shaped ring plate and the second special-shaped ring plate. The supporting stud is passed into the corresponding circular holes of the first special-shaped ring plate and the second special-shaped ring plate, and the two ends are locked by hexagonal nuts respectively.

[0010] Furthermore, the first bellows and the second bellows are both welded to a central bellows support frame.

[0011] Furthermore, the first special-shaped ring plate and the second special-shaped ring plate are fixed to the corresponding bellows by welding.

[0012] Furthermore, the first bellows and the second bellows are both made of stainless steel.

[0013] Furthermore, the bellows central support, the first special-shaped ring plate and the second special-shaped ring plate are all made of ordinary carbon steel.

[0014] According to another aspect, there is provided a special-shaped large-diameter low-vacuum split expansion joint connection structure, which includes the above-mentioned split expansion joint, a first connector, a second connector and a plurality of fillet reinforcement ribs, wherein the first connector and the second connector are respectively arranged on the left and right sides of the split expansion joint, the fillet reinforcement ribs are evenly welded between the first connector and the first special-shaped ring plate, and the fillet reinforcement ribs are evenly welded between the second connector and the second special-shaped ring plate.

[0015] The above technical scheme designs an expansion joint including a bellows central bracket, a first bellows, a second bellows, a first special-shaped ring plate, a second special-shaped ring plate and a plurality of connecting components, as well as the connection relationship between the components, so that the expansion joint can achieve a sealed and stable connection with the special-shaped pipes on both sides, thereby ensuring the overall mechanical properties and aesthetics of long pipelines in a low vacuum environment; at the same time, the expansion joint can be designed as a split structure, which on the one hand facilitates factory production, loading and unloading, transportation, and installation, and on the other hand increases its lateral and vertical displacement flexibility while ensuring its own sealing performance; and the structure and principle of the expansion joint can be widely applied to the design and manufacture of expansion joints of any cross-sectional size. Compared with traditional integrated expansion joints, the expansion joint has a simple structure, is easy to process and manufacture, and has a low processing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The included drawings are used to provide a further understanding of the embodiments of the present invention, which constitute a part of the specification, are used to illustrate the embodiments of the present invention, and together with the text description, explain the principles of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is an axonometric view of a special-shaped large-diameter expansion joint according to an embodiment of the present invention;

[0018] Figure 2 The front view and side view of the large-diameter special-shaped expansion joint according to the embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of a special-shaped ring plate according to an embodiment of the present invention;

[0020] Figure 4 This is a diagram of the connection structure of a large-diameter special-shaped expansion joint according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0023] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0024] like Figure 1-4 As shown, in one embodiment of the present invention, a special-shaped large-diameter low-vacuum split expansion joint is provided, which includes a bellows center bracket 103, a first bellows 105, a second bellows 106, a first special-shaped ring plate 101, a second special-shaped ring plate 107 and a plurality of connecting components, wherein: the bellows center bracket 103 is an annular structure, the first bellows 105 and the second bellows 106 are arranged on the left and right sides of the bellows center bracket 103, and are both fixedly connected to the bellows center bracket 103, the first bellows 105 and the second bellows 106 are connected; the first special-shaped ring plate 101 and the second The special-shaped ring plates 107 all have special-shaped through holes. The first special-shaped ring plate 101 is arranged on a side of the first bellows 105 away from the bellows center bracket 103 and is fixedly connected to the side. The second special-shaped ring plate 107 is arranged on a side of the second bellows 106 away from the bellows center bracket 103 and is fixedly connected to the side. The two through holes are connected to the first bellows 105 and the second bellows 106. A plurality of connecting components are arranged at intervals along the circumference of the first special-shaped ring plate 101 and the second special-shaped ring plate 107, and the connecting components are used to fix the first special-shaped ring plate 101 and the second special-shaped ring plate 107.

[0025] In the embodiment of the present invention, the special-shaped through holes are all large-diameter special-shaped through holes.

[0026] It can be seen that the embodiment of the present invention designs an expansion joint including a bellows center bracket, a first bellows, a second bellows, a first special-shaped ring plate, a second special-shaped ring plate and a plurality of connecting components, as well as the connection relationship between the components, so that the expansion joint can achieve a sealed and stable connection with the special-shaped pipes on both sides, thereby ensuring the overall mechanical properties and aesthetics of long pipelines in a low vacuum environment; at the same time, the expansion joint can be designed as a split structure, which on the one hand facilitates factory production, loading and unloading, transportation, and installation, and on the other hand increases its lateral and vertical displacement flexibility while ensuring its own sealing performance; and the structure and principle of the expansion joint can be widely applied to the design and manufacture of expansion joints of any cross-sectional size. Compared with traditional integrated expansion joints, the expansion joint has a simple structure, is easy to process and manufacture, and has a low processing cost.

[0027] According to one embodiment of the present invention, the connecting assembly includes a supporting stud 102 and two hexagonal nuts 104. Corresponding circular holes are opened on the outer sides of the first special-shaped ring plate 101 and the second special-shaped ring plate 107. The supporting stud 102 is passed into the corresponding circular holes of the first special-shaped ring plate 101 and the second special-shaped ring plate 107, and the two ends are respectively locked by the hexagonal nuts 104.

[0028] Preferably, the first bellows 105 and the second bellows 106 are both connected to the bellows central support frame 103 by welding.

[0029] Preferably, the first special-shaped ring plate 101 and the second special-shaped ring plate 107 are fixed to the corresponding bellows by welding.

[0030] Preferably, the first bellows 105 and the second bellows 106 are both made of stainless steel.

[0031] Preferably, the bellows central support 103, the first special-shaped ring plate 101 and the second special-shaped ring plate 107 are all made of ordinary carbon steel.

[0032] That is, the first bellows and the second bellows used are made of stainless steel. The reason for using stainless steel is its corrosion resistance, good toughness and exquisite appearance. The materials of all other parts can be ordinary carbon steel, which has the characteristics of low cost and easy processing; the support studs and hexagonal nuts used are standard mechanical products on the market, which have the characteristics of low price, sufficient supply and easy installation; the other non-standard mechanical parts have a simple structure and low precision. The current domestic processing capabilities can fully guarantee the manufacturing accuracy of single parts and complete machines.

[0033] According to another embodiment, a special-shaped large-diameter low-vacuum split expansion joint connection structure is provided, which includes the above-mentioned split expansion joint, a first connector 109, a second connector 108 and a plurality of fillet reinforcement ribs 110, wherein the first connector 109 and the second connector 108 are respectively arranged on the left and right sides of the split expansion joint, the fillet reinforcement ribs 110 are evenly welded between the first connector 109 and the first special-shaped ring plate 101, and the fillet reinforcement ribs 110 are evenly welded between the second connector 108 and the second special-shaped ring plate 107.

[0034] In the embodiment of the present invention, reinforcing ribs are filled between the special-shaped ring plate and the connector. On the one hand, the connection strength between the low vacuum split expansion joint and the left and right connectors is increased to ensure that the low vacuum split expansion joint can play a role in compensating for lateral displacement; on the other hand, the overall strength and rigidity of the left and right special-shaped ring plates are increased.

[0035] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0036] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0037] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A special-shaped large-diameter low-vacuum split expansion joint, characterized in that: The expansion joint includes a bellows center bracket, a first bellows, a second bellows, a first special-shaped ring plate, a second special-shaped ring plate and a plurality of connecting components, wherein: the bellows center bracket is an annular structure, the first bellows and the second bellows are arranged on the left and right sides of the bellows center bracket, and are both fixedly connected to the bellows center bracket, and the first bellows and the second bellows are connected; the first special-shaped ring plate and the second special-shaped ring plate both have special-shaped through holes, the first special-shaped ring plate is arranged on a side of the first bellows away from the bellows center bracket and is fixedly connected to the side, the second special-shaped ring plate is arranged on a side of the second bellows away from the bellows center bracket and is fixedly connected to the side, and the two through holes are connected to the first bellows and the second bellows through holes; a plurality of connecting components are arranged at intervals along the circumference of the first special-shaped ring plate and the second special-shaped ring plate, and the connecting components are used to fix the first special-shaped ring plate and the second special-shaped ring plate.

2. A special-shaped large-diameter low-vacuum split expansion joint according to claim 1, characterized in that: The connecting assembly includes a supporting stud and two hexagonal nuts. Corresponding circular holes are opened on the outer sides of the first special-shaped ring plate and the second special-shaped ring plate. The supporting stud is passed into the corresponding circular holes of the first special-shaped ring plate and the second special-shaped ring plate, and the two ends are locked by hexagonal nuts respectively.

3. A special-shaped large-diameter low-vacuum split expansion joint according to claim 1 or 2, characterized in that: The first bellows and the second bellows are both welded to the bellows central support frame.

4. The special-shaped large-diameter low-vacuum split expansion joint according to claim 1 is characterized in that: The first special-shaped ring plate and the second special-shaped ring plate are fixed to the corresponding bellows by welding.

5. A special-shaped large-diameter low-vacuum split expansion joint according to claim 1 or 4, characterized in that: The first bellows and the second bellows are both made of stainless steel.

6. The special-shaped large-diameter low-vacuum split expansion joint according to claim 1 is characterized in that: The bellows central support, the first special-shaped ring plate and the second special-shaped ring plate are all made of ordinary carbon steel.

7. A special-shaped large-caliber low-vacuum split expansion joint connection structure, characterized in that: The connection structure includes the split expansion joint described in claims 1-6, a first connector, a second connector and a plurality of fillet reinforcement ribs, the first connector and the second connector are respectively arranged on the left and right sides of the split expansion joint, the fillet reinforcement ribs are evenly welded between the first connector and the first special-shaped ring plate, and the fillet reinforcement ribs are evenly welded between the second connector and the second special-shaped ring plate.

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