Spherical joint and pipeline system

Abstract

The invention provides a spherical joint and a pipeline system, and the spherical joint comprises a first inner spherical hinge and a second inner spherical hinge which are distributed at an interval and are arranged in a mirror symmetry manner; one end of the first outer spherical hinge is connected with one end of the first inner spherical hinge; one end of the second outer spherical hinge is connected with one end of the second inner spherical hinge, the other end of the second outer spherical hinge is connected with the other end of the first outer spherical hinge, and two oppositely-arranged spherical structures are formed. The spherical joint is compact in structure, and compared with a traditional spherical joint, the compensation angle can be increased by 25% under the condition that the length and the maximum outer diameter are the same.

Description

Technical Field

[0001] The invention relates to the technical field of joints, and in particular to a spherical joint and a pipeline system. Background Art

[0002] The spherical joint is composed of a bellows, spherical parts and connectors. It transmits high-temperature and high-pressure airflow through the internal circulation sealing structure to achieve the sealing connection function. At the same time, the product's flexible compensation component - the bellows produces corresponding displacement, the spherical structure is used for self-limiting, and the bellows and spherical structure are used to achieve angle compensation. The linkage between the bellows and the spherical structure protects the pipeline system from thermal expansion and contraction caused by installation errors, vibrations and high temperatures, thereby reducing the stress of the pipeline system and making the pipeline system work safely and reliably.

[0003] As a compensation device for high-pressure pipelines, the ball joint structure is the most widely used in pipelines. It has the advantages of compact structure, long life, and bellows embedded structure. However, due to the compact structure of the ball joint and the different functions of each part, the product has a low degree of three-dimensionalization. At the same time, the ball joint is installed in the high-pressure pipeline. Due to the limitation of the installation position, the length and outer dimensions of the ball joint should not be too large, which results in the compensation angle of the ball joint generally not exceeding 5°, which cannot meet the large-angle compensation requirements of some pipelines. Summary of the invention

[0004] In view of this, the present invention provides a spherical joint and a pipeline system to achieve the purpose of meeting the large-angle compensation requirements of some pipelines.

[0005] The present invention provides the following technical solution: a spherical joint, comprising: a first inner ball joint and a second inner ball joint, which are distributed at intervals and are arranged in mirror symmetry; a first outer ball joint, one end of which is connected to one end of the first inner ball joint; a second outer ball joint, one end of which is connected to one end of the second inner ball joint, and the other end of the second outer ball joint is connected to the other end of the first outer ball joint, to form two symmetrical spherical structures.

[0006] Furthermore, the first inner ball joint, the first outer ball joint, the second outer ball joint and the second inner ball joint are connected in sequence.

[0007] Furthermore, a receiving cavity is formed inside the first inner ball joint, the first outer ball joint, the second outer ball joint and the second inner ball joint.

[0008] Furthermore, the spherical joint further comprises a bellows arranged inside the accommodating cavity.

[0009] Furthermore, the spherical joint further comprises a welding ring, which is arranged inside the accommodating cavity and located at the end of the bellows.

[0010] Furthermore, there are at least two welding rings, which are symmetrically arranged at both ends of the corrugated tube.

[0011] The present invention also provides a pipeline system, comprising the above-mentioned spherical joint.

[0012] Furthermore, the pipeline system includes a first connecting pipe and a second connecting pipe, the first inner ball joint is connected to the first connecting pipe, and the second inner ball joint is connected to the second connecting pipe.

[0013] Furthermore, two ends of the corrugated tube are respectively connected to the first connecting pipe and the second connecting pipe.

[0014] Compared with the prior art, the beneficial effects that can be achieved by at least one of the above-mentioned technical solutions adopted by the present invention include at least the following: the embodiment of the present invention has a compact structure, and compared with the traditional spherical joint, it can achieve the ability to increase the compensation angle by 25% under the conditions of the same length and maximum outer diameter. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0017] Reference numerals in the figure: 1. first inner ball joint; 2. second inner ball joint; 3. first outer ball joint; 4. second outer ball joint; 5. bellows; 6. welding ring; 7. first connecting pipe; 8. second connecting pipe. DETAILED DESCRIPTION

[0018] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0019] The following describes the implementation methods of the present application through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0020] like Figure 1As shown, an embodiment of the present invention provides a spherical joint, including a first inner ball joint 1, a second inner ball joint 2, a first outer ball joint 3, and a second outer ball joint 4. The first inner ball joint 1 and the second inner ball joint 2 are arranged at intervals, and the first inner ball joint 1 and the second inner ball joint 2 are arranged in mirror symmetry; one end of the first outer ball joint 3 is connected to one end of the first inner ball joint 1; one end of the second outer ball joint 4 is connected to one end of the second inner ball joint 2, and the other end of the second outer ball joint 4 is connected to the other end of the first outer ball joint 3, and two oppositely arranged spherical structures are formed.

[0021] The embodiment of the present invention has a compact structure and can achieve a 25% increase in compensation angle under the same length and maximum outer diameter conditions compared with a traditional spherical joint.

[0022] The first inner ball joint 1 , the first outer ball joint 3 , the second outer ball joint 4 and the second inner ball joint 2 are connected in sequence, and a receiving cavity is formed on the inner sides of the first inner ball joint 1 , the first outer ball joint 3 , the second outer ball joint 4 and the second inner ball joint 2 .

[0023] In the embodiment of the present invention, the first inner ball joint 1 and the first outer ball joint 3 form one of the spherical structures, and the second outer ball joint 4 and the second inner ball joint 2 form the other spherical structure. In the assembly position, the arc ends of the two spherical structures are arranged toward the outside, and the bottom ends of the two spherical structures are arranged facing each other.

[0024] Preferably, the two spherical structures may adopt the same structure or different structures, and the present invention may freely select one according to different implementation requirements.

[0025] The spherical joint also includes a bellows 5, which is arranged inside the accommodating cavity. The bellows is a flexible element, which is mainly used to absorb and compensate for the displacement changes caused by thermal expansion, mechanical vibration or installation error in the system. At the same time, it can balance the pressure and prevent the pressure fluctuation from damaging the system.

[0026] The spherical joint further comprises a welding ring 6 which is arranged inside the receiving cavity and located at the end of the bellows 5 .

[0027] The welding ring 6 is welded to the end of the bellows 5, which enhances the structural stability of the entire spherical joint and ensures reliability under conditions such as high pressure or temperature changes. The use of the welding ring 6 and the bellows 5 enables the spherical joint to effectively compensate for displacement caused by temperature changes, installation errors and mechanical vibrations, ensuring the safe and stable operation of the system.

[0028] Preferably, there are at least two welding rings 6, which are symmetrically arranged at both ends of the bellows 5. The use of the welding ring 6, in conjunction with the bellows 5, allows the joint to only bear bending stress during compensation, eliminating the sudden shear stress during compensation, thereby increasing the fatigue life of the product.

[0029] The structural ball joint of the present invention is assembled and welded from 9 parts of 5 kinds. Compared with ordinary ball joints, the types of parts are less and the product has a high degree of three-dimensionalization.

[0030] The present invention also includes a pipeline system including the above-mentioned ball joint. The pipeline system of the present invention also includes a first connecting pipe 7 and a second connecting pipe 8 , the first inner ball joint 1 is connected to the first connecting pipe 7 , and the second inner ball joint 2 is connected to the second connecting pipe 8 .

[0031] The pipeline system of the present invention achieves efficient and reliable connection by integrating the above-mentioned spherical joint and the first connecting pipe 7 and the second connecting pipe 8. Among them, the first inner ball joint 1 is connected to the first connecting pipe 7, and the second inner ball joint 2 is connected to the second connecting pipe 8. This configuration enhances the flexibility and compensation capability of the system, allowing the pipeline to perform effective displacement compensation when facing temperature changes, mechanical vibrations or installation errors. Such a design not only improves the pressure-bearing capacity of the pipeline system, but also reduces the stress concentration caused by thermal expansion and contraction or external forces, thereby ensuring the safety, stability and long-term operation reliability of the entire pipeline system.

[0032] Both ends of the bellows 5 are connected to a first connecting pipe 7 and a second connecting pipe 8 respectively.

[0033] The two ends of the bellows 5 are connected to the first connecting pipe 7 and the second connecting pipe 8 respectively. This design enables the pipeline system to more flexibly cope with challenges under various working conditions. This connection method of the bellows 5 allows the pipeline system to perform effective thermal compensation and mechanical displacement under different temperatures and pressures, reducing stress caused by thermal expansion or mechanical vibration. At the same time, this structure also improves the sealing and pressure resistance of the system, ensures the stability and safety of the pipeline system under high pressure or temperature fluctuation environments, extends the service life of the entire system, and reduces maintenance costs.

[0034] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A ball joint, characterized in that: include: The first inner ball joint (1) and the second inner ball joint (2) are arranged at intervals and are arranged in a mirror-symmetrical manner. A first outer ball joint (3), one end of which is connected to one end of the first inner ball joint (1); One end of the second outer ball joint (4) is connected to one end of the second inner ball joint (2), and the other end of the second outer ball joint (4) is connected to the other end of the first outer ball joint (3), forming two symmetrical spherical structures.

2. The ball joint according to claim 1, characterized in that The first inner ball joint (1), the first outer ball joint (3), the second outer ball joint (4) and the second inner ball joint (2) are connected in sequence.

3. The ball joint according to claim 2, characterized in that: The inner sides of the first inner ball joint (1), the first outer ball joint (3), the second outer ball joint (4) and the second inner ball joint (2) form a receiving cavity.

4. The ball joint according to claim 3, characterized in that The spherical joint further comprises a bellows (5) which is arranged inside the accommodating cavity.

5. The ball joint according to claim 4, characterized in that The spherical joint further comprises a welding ring (6) which is arranged inside the accommodating cavity and located at the end of the bellows (5).

6. The ball joint according to claim 5, characterized in that There are at least two welding rings (6) symmetrically arranged at two ends of the corrugated tube (5).

7. A piping system comprising a ball joint, characterized in that: The spherical joint is the spherical joint according to any one of claims 1 to 6.

8. The pipeline system according to claim 7, characterized in that: The pipeline system comprises a first connecting pipe (7) and a second connecting pipe (8), the first inner ball joint (1) is connected to the first connecting pipe (7), and the second inner ball joint (2) is connected to the second connecting pipe (8).

9. The pipeline system according to claim 7, characterized in that: The two ends of the corrugated tube (5) are respectively connected to a first connecting tube (7) and a second connecting tube (8).

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