Bellows and bellows connection structure

Abstract

The utility model belongs to bellows technical field, specifically provides a bellows and bellows connecting structure. The bellows includes bellows body and two connecting plates, and the connecting pipe orifice of bellows body both ends forms one expansion pipe orifice, and forms the other one to contract the pipe orifice, and the sum of axial length of expansion pipe orifice and contract pipe orifice is greater than half wavelength. Such setting, when carrying out the connection, the contract pipe orifice of former bellows body can be inserted into the expansion pipe orifice of latter bellows body, and the connecting position of two bellows forms the socket structure, so that the connecting position of two bellows has the part of overlapping lap joint. The part of overlapping lap joint makes the thickness of this position become big, enhances the bending and deformation resistance of pipe orifice position, and can disperse a part of radial shear force that the connecting bolt receives, improves the safety and durability of connection. When the multiple pipe sections are connected with each other, the overlapping lap joint part can also increase the sealing performance of the connecting place.

Description

Technical Field

[0001] This application belongs to the field of corrugated pipe technology, specifically a corrugated pipe and a corrugated pipe connection structure. Background Technology

[0002] A corrugated pipe is a pipe connection component with a corrugated pipe shape, which can compensate for displacement and absorb vibration to a certain extent. Corrugated pipes are widely used in ventilation ducts, building construction, underground pipelines, and the construction of open channels and ditches.

[0003] When installing long sections, corrugated pipes typically require multiple sections to be spliced ​​together. There are two common splicing methods: permanent welding and the use of detachable clamps or screws. Welded connections are often used in high-temperature, high-pressure applications requiring permanent connections and leak-proof systems. While this method improves the pipe's sealing and pressure resistance, it makes repairs difficult when localized damage occurs, resulting in higher time and material costs. For detachable connections, clamps are only suitable for smaller pipe diameters, while screw connections are more versatile and suitable for pipe diameters ranging from a few centimeters to several hundred centimeters.

[0004] Since corrugated pipes are usually thin-walled parts, for large-diameter corrugated pipes that are connected by screws, the larger the pipe diameter, the more easily the pipe joints are deformed. In addition, the screws at the connection points of the two pipes will also be subjected to greater shear forces. Over time, problems such as deformation at the connection points and bolt breakage are likely to occur. Utility Model Content

[0005] Based on the above-mentioned technical problems, this application provides a corrugated pipe and a corrugated pipe connection structure to solve the technical problems in the prior art where the pipe opening at the connection position of thin-walled corrugated pipe is prone to deformation and bolt breakage.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] In a first aspect, this application provides a bellows, comprising:

[0008] A corrugated pipe body, wherein one end of the corrugated pipe body terminates at the outward expansion stage, forming an expanding orifice, and the other end terminates at the inward contraction stage, forming a contracting orifice; the axial lengths of both the expanding and contracting orifices are less than half a wavelength, and the sum of the axial lengths of the expanding and contracting orifices is greater than half a wavelength; and

[0009] Two connecting plates are respectively disposed at both ends of the corrugated pipe body. One connecting plate is aligned with the end face of the expansion port, and the other connecting plate is located on the outer periphery of the contraction port, and the connecting plate at least avoids the insertion part of the contraction port.

[0010] In one possible implementation, the cross-section of the bellows body perpendicular to its own axis is annular or fan-shaped.

[0011] In one possible implementation, the corrugated pipe body is a straight pipe or a bend.

[0012] In one possible implementation, the bellows body has at least one complete crest and at least one complete trough.

[0013] In one possible implementation, the bellows body is a metal bellows.

[0014] In one possible implementation, the wall thickness of the corrugated pipe body is in the range of 5-10 mm.

[0015] In one possible implementation, the inner diameter of the bellows body at the crest position ranges from 0.8 to 5.2 m.

[0016] In one possible implementation, the connecting plate has a plurality of connecting holes spaced apart along its circumference.

[0017] Compared with the prior art, the beneficial effects of the bellows provided in this application are:

[0018] The corrugated pipe provided in this application includes a corrugated pipe body and two connecting plates. One of the connecting ports at both ends of the corrugated pipe body forms an expansion port and the other forms a contraction port. When connecting, the contraction port of the first corrugated pipe body can be inserted into the expansion port of the second corrugated pipe body. The connection position of the two corrugated pipes forms a socket structure, so that the connection position of the two corrugated pipes has an overlapping part.

[0019] From a structural strength perspective, the overlapping section increases the thickness at that location, enhancing the pipe's resistance to bending and deformation. From a connection strength perspective, the overlap disperses some of the radial shear force on the connecting bolts, improving connection safety and durability. From a sealing perspective, the inner and outer walls of the corrugated pipe in the overlapping area press tightly against each other, forming an effective sealing barrier for better sealing. From an installation convenience perspective, the socket structure has a self-positioning function during installation, quickly guiding the two corrugated pipes to accurate alignment, simplifying the installation process, reducing the technical requirements for operators, and improving construction efficiency.

[0020] Secondly, this application provides a bellows connection structure, including:

[0021] The first bellows has one end terminated at the corrugation expansion stage, forming an expansion port; the axial length of the expansion port is less than half the wavelength.

[0022] A first connecting plate is disposed on the outer periphery of the expansion port;

[0023] The second corrugated tube, with one end terminated at the corrugation contraction stage to form a contraction orifice, wherein the axial length of the contraction orifice is less than half the wavelength, and the contraction orifice is contracted at least to the point where it can be inserted into the expansion orifice; and

[0024] The second connecting plate is located on the outer periphery of the shrink tube opening and avoids the insertion part of the shrink tube opening;

[0025] The contraction port is inserted into the expansion port, and the outer wall of the contraction port is in contact with the inner wall of the expansion port. The first connecting plate and the second connecting plate are attached and fixed together.

[0026] In one possible implementation, both the first connecting plate and the second connecting plate are provided with connecting holes, and all connecting holes are light holes;

[0027] The corrugated pipe connection structure also includes a connecting bolt, which passes through the connecting hole and is threaded with a nut.

[0028] In one possible implementation, both the first connecting plate and the second connecting plate are provided with connecting holes, one of which is a smooth hole and the other is a threaded hole.

[0029] The bellows connection structure also includes a connecting bolt, the screw end of which passes through the open hole and engages with the threaded hole.

[0030] The bellows connection mechanism provided in this application has the same technical effect as the bellows provided in the above-described implementation, and will not be described again here. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the circular bellows structure in an embodiment of this application;

[0033] Figure 2 This is a schematic diagram of the semi-circular corrugated pipe in an embodiment of this application.

[0034] Figure 3 This is a partial cross-sectional view of the circular bellows in an embodiment of this application;

[0035] Figure 4This is a schematic diagram showing the connection of two circular corrugated pipes in an embodiment of this application;

[0036] Figure 5 This is a partial cross-sectional view of the connection point of two circular bellows in an embodiment of this application;

[0037] Figure 6 This is a schematic diagram showing the connection of two semi-circular corrugated pipes in an embodiment of this application;

[0038] Explanation of reference numerals in the attached figures:

[0039] 10. Corrugated pipe body; 11. Expansion port; 12. Contraction port; 20. Connecting plate; 21. Connecting hole; 30. Connecting bolt. Detailed Implementation

[0040] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0041] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0042] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0043] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0045] Please refer to the following: Figures 1 to 6The following describes the corrugated pipe and corrugated pipe connection structure provided in the embodiments of this application.

[0046] In a first aspect, embodiments of this application provide a corrugated pipe, including a corrugated pipe body 10 and two connecting plates 20. One end of the corrugated pipe body 10 terminates at the corrugation expansion stage (i.e., the stage from the trough to the crest) and forms an expansion port 11, while the other end terminates at the corrugation contraction stage (i.e., the stage from the crest to the trough, such as...). Figure 3 The expansion port 11 and the contraction port 12 are both less than half a wavelength, and the sum of the axial lengths of the expansion port 11 and the contraction port 12 is greater than half a wavelength. This arrangement allows for an overlapping portion to be formed at the port positions when two bellows are connected. The axial length refers to the length along the axial direction of the bellows body 10.

[0047] To connect and fix the two corrugated pipes, two connecting plates 20 are provided at both ends of the corrugated pipe body 10. The two connecting plates 20 are respectively located at both ends of the corrugated pipe body 10. One connecting plate 20 is aligned with the end face of the expansion port 11, and the other connecting plate 20 is located on the outer periphery of the contraction port 12, and this connecting plate 20 at least avoids the insertion part of the contraction port 12. When the two corrugated pipes are connected end to end, the connecting plates 20 of the two corrugated pipes fit together.

[0048] The bellows body 10 has at least one complete crest and at least one complete trough. The specific number of crests and troughs can be set according to the length and wavelength of the bellows body 10. Each end of the bellows body 10 is provided with a connecting port. One connecting port is outwardly flared, i.e., expansion port 11, and the other connecting port is constricted, i.e., constriction port 12.

[0049] Two connecting plates 20 are respectively disposed at both ends of the bellows body 10, and are both located at the position closest to the corresponding connecting pipe opening at the crest. The connecting plates 20 are arranged around the outer periphery of the bellows body 10, and have multiple connecting holes 21 spaced apart along their own circumference. The connecting holes 12 are used for connecting bolts 30 to pass through. The connecting holes 12 can be plain holes or threaded holes as needed.

[0050] Compared with the prior art, the beneficial effects of the bellows provided in the embodiments of this application are:

[0051] The corrugated pipe provided in this embodiment includes a corrugated pipe body 10 and two connecting plates 20. One of the connecting ports at both ends of the corrugated pipe body 10 forms an expansion port 11, and the other forms a contraction port 12. When connecting multiple corrugated pipes, the contraction port 12 of the previous corrugated pipe body can be inserted into the expansion port 11 of the next corrugated pipe body. The connection position of the two corrugated pipes forms a socket structure, so that the connection position of the two corrugated pipes has an overlapping part.

[0052] From a structural strength perspective, the overlapping portion increases the thickness at that location, enhancing the pipe's resistance to bending and deformation. From a connection strength perspective, the overlapping portion disperses some of the radial shear force on the connecting bolts 30, improving connection safety and durability. From a sealing perspective, the inner and outer walls of the corrugated pipe body 10 in the overlapping area press tightly against each other, forming an effective sealing barrier for better sealing. From an installation convenience perspective, the socket structure has a self-positioning function during installation, quickly guiding the two corrugated pipe bodies 10 to accurate alignment, simplifying the installation process, reducing the technical requirements for operators, and improving construction efficiency.

[0053] like Figure 1 and Figure 2 The corrugated pipe body 10 has a closed circular ring, square ring or semi-open fan ring cross section perpendicular to its own axis, and can be used for laying underground pipelines, protective pipes and open channels, open ditches and other places.

[0054] The shape of the corrugated pipe body 10 can be a straight pipe or a bent pipe at a certain angle (such as 60°, 80°, etc.). The bent pipe structure can be used to change the direction of the pipe. There is no specific limitation on the specific bending angle. Users can set it according to the actual situation.

[0055] The corrugated pipe body 10 is a metal corrugated pipe, specifically a steel corrugated pipe. The wall thickness of the corrugated pipe body 10 ranges from 5 to 10 mm. This wall thickness range is the preferred option for large-diameter thin-walled corrugated pipes, ensuring structural strength and rigidity while also considering material savings and product lightweighting. The inner diameter of the corrugated pipe body 10 at the crest position ranges from 0.8 to 5.2 m. This inner diameter range is suitable for pipe applications of different diameters.

[0056] Secondly, this application provides a corrugated pipe connection structure, including a corrugated pipe as in any of the above embodiments, wherein the number of corrugated pipes is at least two, the corrugated pipe bodies 10 of two adjacent corrugated pipes are connected end to end, the connecting plates 20 of two adjacent corrugated pipes are fitted together, and the connecting holes 21 are coaxially corresponding.

[0057] For ease of explanation, the two corrugated pipes are defined as the first corrugated pipe and the second corrugated pipe, respectively. One end of the first corrugated pipe ends at the corrugation expansion stage and forms an expansion port 11. The axial length of the expansion port 11 is less than half a wavelength, and a first connecting plate is disposed on the outer periphery of the expansion port 11. One end of the second corrugated pipe ends at the corrugation contraction stage and forms a contraction port 12. The axial length of the contraction port 12 is less than half a wavelength, and the contraction port 12 is contracted to the point that it can be inserted into the expansion port 11. A second connecting plate is disposed on the outer periphery of the contraction port 12 and avoids the insertion part of the contraction port 12. The contraction port 12 is inserted into the expansion port 11, and the outer wall of the contraction port 12 is attached to the inner wall of the expansion port 11. The first connecting plate and the second connecting plate are attached and fixed.

[0058] Both the first connecting plate and the second connecting plate have connecting holes 21, and multiple connecting bolts 30 are inserted into the connecting holes 21 in a corresponding manner.

[0059] like Figure 4 , Figure 5 and Figure 6 As shown, the overlapping area formed by the first and second corrugated pipes constitutes an effective internal support structure, which significantly enhances the bending and deformation resistance at the interface. After the first and second connecting plates are attached to each other, they are fastened by connecting bolts 30. The overlapping part can withstand a portion of the radial force, preventing the connecting bolts 30 from breaking.

[0060] The connecting hole 21 on the first and second connecting plates can be either a smooth hole or a threaded hole. Specifically, when both connecting holes 21 on the first and second connecting plates are smooth holes, the threaded end of the connecting bolt 30 is threaded with a nut. When one of the connecting holes 21 on the first and second connecting plates 20 is a smooth hole and the other is a threaded hole, the threaded end of the connecting bolt 30 passes through the smooth hole and engages with the threaded hole.

[0061] To further improve the sealing effect, a gasket or sealant can be applied to the mating surfaces of the first and second connecting plates. Installing gaskets and applying sealant are common practices in pipe installation and will not be elaborated upon here.

[0062] It is understood that the parts in the above embodiments can be freely combined or deleted to form different combined embodiments. The specific contents of each combined embodiment will not be repeated here. After this description, it can be considered that the present utility model specification has recorded each combined embodiment and can support different combined embodiments.

[0063] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A corrugated pipe, characterized in that, include: A corrugated pipe body (10), one end of which terminates at the corrugation expansion stage and forms an expansion port (11), and the other end terminates at the corrugation contraction stage and forms a contraction port (12); the axial lengths of both the expansion port (11) and the contraction port (12) are less than half a wavelength, and the sum of the axial lengths of the expansion port (11) and the contraction port (12) is greater than half a wavelength; and Two connecting plates (20) are respectively disposed at both ends of the corrugated pipe body (10). One connecting plate (20) is aligned with the end face of the expansion port (11), and the other connecting plate (20) is located on the outer periphery of the contraction port (12). The connecting plate (20) at least avoids the insertion part of the contraction port (12).

2. The corrugated pipe according to claim 1, characterized in that, The corrugated pipe body (10) has a cross-section that is either annular or fan-shaped, perpendicular to its own axis.

3. The corrugated pipe according to claim 1, characterized in that, The corrugated pipe body (10) is a straight pipe or a bent pipe.

4. The corrugated pipe according to claim 1, characterized in that, The bellows body (10) has at least one complete crest and at least one complete trough.

5. The corrugated pipe according to claim 1, characterized in that, The connecting plate (20) has a plurality of connecting holes (21) spaced apart along its circumference.

6. The corrugated pipe according to claim 1, characterized in that, The wall thickness of the corrugated pipe body (10) ranges from 5 to 10 mm.

7. The corrugated pipe according to claim 1, characterized in that, The inner diameter of the corrugated pipe body (10) at the crest position ranges from 0.8 to 5.2 m.

8. A bellows connection structure, characterized in that, include: The first bellows has one end terminated at the corrugation expansion stage and forms an expansion port (11); the axial length of the expansion port (11) is less than half the wavelength. The first connecting plate is disposed on the outer periphery of the expansion port (11); The second corrugated tube has one end terminated at the corrugated shrinkage stage and forms a shrinkage port (12). The axial length of the shrinkage port (12) is less than half the wavelength, and the shrinkage port (12) shrinks at least to the point that it can be inserted into the expansion port (11). as well as The second connecting plate is located on the outer periphery of the shrink tube opening (12) and avoids the insertion part of the shrink tube opening (12); The contraction port (12) is inserted into the expansion port (11), and the outer wall of the contraction port (12) is in contact with the inner wall of the expansion port (11), and the first connecting plate is in contact with and fixed to the second connecting plate.

9. The corrugated pipe connection structure according to claim 8, characterized in that, Both the first connecting plate and the second connecting plate are provided with connecting holes (21), and the connecting holes (21) are all light holes; The corrugated pipe connection structure also includes a connecting bolt (30), which passes through the connecting hole (21) and is threaded with a nut.

10. The bellows connection structure according to claim 8, characterized in that, Both the first connecting plate and the second connecting plate are provided with connecting holes (21). One of the connecting holes (21) of the first connecting plate and the connecting hole (21) of the second connecting plate is a smooth hole and the other is a threaded hole. The bellows connection structure also includes a connecting bolt (30), the screw end of which passes through the light hole and engages with the threaded hole.

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