An expansion joint with a high-speed flow medium guide device

Abstract

The utility model provides an expansion joint with a high-speed flow medium guide device, which is suitable for a bend pressure balanced expansion joint. The bend pressure balanced expansion joint is connected to a pipeline and includes a tee assembly and a guide plate. The guide plate is arranged inside the tee assembly to reduce the flow resistance of the pipeline. The utility model can effectively reduce the flow resistance of the high-speed medium of the pressure pipeline in the bend pressure balanced expansion joint, reduce the pressure loss of the pipeline, reduce the possibility of damage to the expansion joint due to the impact of the medium, enhance the safety of the pipeline, and improve the safe service life of the metal bellows expansion joint as an important flexible compensation equipment of the pipeline system.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion joints, in particular to an expansion joint with a high-speed flow medium guide device. Background Art

[0002] The elbow pressure balance expansion joint is a flexible compensation device generally used for sensitive equipment such as pumps, compressors, turbines and steam turbines. It is close to the "L" pipe section connected to the equipment and is used to compensate for the combined axial and lateral displacement of the pipeline, isolate equipment vibration, and meet the equipment pipe mouth force requirements. With the expansion of the scale of industrial equipment, the pipe diameter and medium flow rate of the elbow pressure balance expansion joint are also increasing. When the flow direction of large flow and high flow rate media changes inside the expansion joint, the force of the elbow or tee becomes more demanding and complex.

[0003] When the medium flows through the tee, due to the effects of centrifugal force and inertial force, the pressure loss of the pipeline medium flow increases and the flow resistance increases. At the same time, the inner wall of the medium after the flow direction changes is prone to form a large vortex area, and the tiny impurities in the pipeline are easy to collide with the pipeline wall with the medium in the vortex area. Over time, the worn parts of the pipeline wall are prone to perforation, rupture and other damage. Not only that, the greater the flow rate of the medium, the greater the impact and deformation of the expansion joint tee. Accompanied by a large number of vortices, it is inevitable that the risk of pipeline damage due to medium impact increases, posing a huge safety hazard. Summary of the invention

[0004] In view of this, the utility model aims to propose an expansion joint with a high-speed flow medium guide device to solve the problem of pipeline damage caused by increased pressure loss and increased flow resistance due to high-speed flow medium flowing through the tee.

[0005] The technical solution of the utility model is achieved as follows: an expansion joint with a high-speed flow medium guide device is suitable for a bend pressure balanced expansion joint, the bend pressure balanced expansion joint is connected to the pipeline, includes a three-way assembly and a guide plate, the guide plate is arranged inside the three-way assembly to reduce the flow resistance of the pipeline.

[0006] Furthermore, the guide plate is a curved surface.

[0007] Furthermore, the cross-section of the guide plate is arc-shaped, and the turning angle range of the guide plate is 30°-90°.

[0008] Furthermore, the three-way assembly is T-shaped, and the axisymmetric line of the guide plate cross section is at 45° to the flow direction of the medium in the pipeline.

[0009] Furthermore, the surface of the guide plate perpendicular to the medium flow direction is streamlined.

[0010] Furthermore, a plurality of guide plates are arranged inside the three-way assembly.

[0011] Furthermore, three guide plates are arranged inside the three-way assembly.

[0012] Furthermore, the guide plates are evenly distributed in parallel in the three-way assembly.

[0013] Furthermore, the three-way assembly is welded to two side surfaces of the guide plate.

[0014] Furthermore, the three-way assembly is detachably connected to the guide plate.

[0015] Compared with the prior art, the expansion joint with a high-speed flow medium guide device of the utility model has the following advantages:

[0016] 1. The utility model arranges the guide plate inside the three-way assembly, which can effectively reduce the flow resistance of the high-flow medium of the pressure pipeline in the elbow pressure balance expansion joint, reduce the pipeline pressure loss, reduce the possibility of damage to the expansion joint due to the impact of the medium, enhance the safety of the pipeline, and improve the safe service life of the metal bellows expansion joint as an important flexible compensation equipment of the pipeline system.

[0017] 2. The guide plate adopted in the utility model has a simple structure and strong applicability, and can be used in pressure pipes of the same type. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0019] Figure 1 It is a schematic diagram of the expansion joint structure in the prior art;

[0020] Figure 2 This is a schematic diagram of the expansion joint structure of the utility model;

[0021] Figure 3 A schematic diagram of the structure of the guide plate in the utility model;

[0022] Figure 4 A cross-sectional view of the guide plate in the utility model;

[0023] Description of reference numerals:

[0024] 1. Tee assembly; 2. Guide plate; 201. First guide plate; 202. Second guide plate; 203. Third guide plate; 3. End pipe assembly; 4. Working bellows; 5. Guide tube; 6. Intermediate pipe assembly; 7. Tie rod assembly; 8. Shipping assembly; 9. Balance bellows; 10. Head assembly. DETAILED DESCRIPTION

[0025] In order to make the technical means, objectives and effects of the present invention easy to understand, the embodiments of the present invention are described in detail below with reference to specific drawings.

[0026] It should be noted that all terms used in the present invention to indicate direction and position, such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", "top", "lower", "lateral", "longitudinal", "center", etc., are only used to explain the relative position relationship and connection status between the components in a certain state, and are only for the convenience of describing the present invention, rather than requiring the present invention to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0027] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0029] The utility model discloses an expansion joint with a high-speed flow medium guide device, which is suitable for a bend pressure balanced expansion joint. Both ends of the bend pressure balanced expansion joint are connected to pipelines. The utility model comprises a tee component 1 and a guide plate 2. The guide plate 2 is arranged inside the tee component 1 to reduce the flow resistance of the pipeline.

[0030] The guide plate 2 is arranged inside the three-way component 1, which can effectively guide the flow direction of the high-speed flow medium, reduce the flow resistance of the high-speed medium of the pressure pipeline in the elbow pressure balance type expansion joint, reduce the pipeline pressure loss, and reduce the possibility of damage to the elbow pressure balance type expansion joint due to medium impact, thereby enhancing the safety of the pipeline and prolonging the safe service life of the metal bellows expansion joint as an important flexible compensation equipment of the pipeline system; at the same time, it has a simple structure and strong applicability, can increase the rigidity and stability inside the pipeline, and can be used in the same type of pressure pipelines.

[0031] Specifically, the elbow pressure balanced expansion joint includes an end pipe assembly 3, a working bellows 4, an intermediate pipe assembly 6, a tee assembly 1, a balancing bellows 9 and a head assembly 10 which are sequentially connected along the pipeline axis; a guide tube 5 is arranged on the inner wall of the working bellows 4 and the balancing bellows 9; the end pipe assembly 3 and the head assembly 10 are connected via a tie rod assembly 7; a shipping assembly 8 is arranged on the outer side of the working bellows 4 and the balancing bellows 9.

[0032] like Figure 1 As shown, specifically, the medium flow direction in the elbow pressure balanced expansion joint enters from the left pipeline, passes through the end pipe assembly 3, the working bellows 4, the middle pipe assembly 6, and the tee assembly 1, and then turns 90 degrees to flow out.

[0033] Specifically, a plurality of guide plates 2 are arranged inside the three-way assembly 1. This arrangement can better guide the flow direction of the high-speed flow medium, reduce the generation of turbulence and eddy currents, improve the uniformity of the distribution of the high-speed flow medium, reduce the wear of the high-speed flow medium on the pipe wall, reduce pressure loss and energy consumption, and can significantly improve the operating efficiency and stability of the pressure-balanced expansion joint.

[0034] Specifically, three guide plates 2 are arranged inside the three-way assembly 1. The structure of the guide plates 2 can distribute the medium with large flow and high flow velocity between the multiple guide plates 2 inside the expansion joint. When the flow direction of the medium changes, the generation of vortex is reduced, thereby reducing the local resistance of the expansion joint, avoiding the problems of increased pressure loss and increased flow resistance of the pipeline medium flow; at the same time, when the number of guide plates is too large, the effect of reducing the flow resistance of the expansion joint is limited. Considering the difficulty of installing the guide plates 2 and the production cost, there is no need to install too many guide plates 2, which reduces the number of guide plates, helps to reduce the weight of the device, and reduces the production cost.

[0035] Specifically, the guide plates 2 are evenly distributed in parallel in the three-way assembly 1. The arrangement of evenly distributed guide plates 2 enables the high-speed flow medium to form a uniform flow state in the pipeline, effectively reduces the turbulence and eddy current phenomenon of the high-speed flow medium in the pipeline, reduces the impact and wear of the high-speed flow medium on the pipe wall, improves the conveying efficiency of the high-speed flow medium, realizes fine adjustment, and achieves a better resistance reduction effect.

[0036] Specifically, the guide plate 2 is a curved surface. This arrangement can guide the change of the flow direction of the flowing medium, reduce the impact of the high-speed medium on the pipe wall, and improve the stability of the pipeline system.

[0037] Specifically, the cross section of the guide plate 2 is arc-shaped, and the angle range of the guide plate 2 is 30°-90°. The guide plate 2 is simple in structure and easy to process, and can effectively improve the flow direction of the high-speed flow medium, reduce the energy loss of the high-speed flow medium, and achieve better resistance reduction effect.

[0038] like Figure 2 As shown, specifically, the concave side of the guide plate 2 faces the medium inflow side. This orientation of the guide plate 2 can more effectively guide the medium flow direction and reduce losses.

[0039] Specifically, the three-way assembly 1 is T-shaped, and the axisymmetric line of the cross section of the guide plate 2 is 45 degrees to the flow direction of the medium in the pipeline. This arrangement enables the guide plate 2 to be located at a position where the flow direction of the high-speed flow medium in the three-way pipeline changes, which can further reduce the flow resistance of the guide plate 2 to the high-speed flow medium and reduce pressure loss; at the same time, it is beneficial to save the material of the guide plate 2, reduce the weight of the device, and reduce the production cost.

[0040] Specifically, the tee assembly 1 is welded to the two sides of the guide plate 2. This arrangement can make the connection structure between the tee assembly 1 and the guide plate 2 simple, the overall structure has strong reliability, and the advantages of no maintenance are helpful to reduce the use cost.

[0041] Specifically, the three-way assembly 1 is detachably connected to the guide plate 2. This connection structure can achieve a stable and accurate connection between the guide plate 2 and the three-way assembly 1, improve the performance of the device, facilitate later repair, replacement and maintenance, and reduce the cost of use.

[0042] Preferably, the three-way assembly 1 is screwed to the guide plate 2. This arrangement has a simple connection structure, is easy to process and install, is convenient for later repair, replacement and maintenance, has strong parts versatility, and helps to reduce the cost of use.

[0043] Specifically, the surface of the guide plate 2 perpendicular to the medium flow direction is streamlined. The configuration of the guide plate 2 helps to reduce the flow resistance of the guide plate 2 to the high-speed flow medium, reduce the damage of the high-speed flow medium to the guide plate 2 itself and the connection structure with the three-way assembly 1, and extend the service life of the guide plate 2.

[0044] Example 1

[0045] like Figure 2 and Figure 3As shown, the guide device of this embodiment welds and fixes the first guide plate 201, the second guide plate 202, and the third guide plate 203 to the three-way assembly 1 respectively. When the pipeline is started, the high-speed flowing medium flows through the expansion joint three-way assembly 1. Under the action of the guide plate 2, the medium can flow through the three-way assembly 1 more smoothly, reducing the internal flow resistance of the elbow pressure balance expansion joint and reducing the collision and wear between the high-speed medium and the pipeline wall, thereby improving the safety of the pipeline.

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An expansion joint with a high-speed flow medium guide device, suitable for a bend pressure balanced expansion joint, the bend pressure balanced expansion joint is connected to a pipeline, characterized in that: It comprises a three-way assembly (1) and a guide plate (2), wherein the guide plate (2) is arranged inside the three-way assembly (1) and is used to reduce the flow resistance of the pipeline.

2. The expansion joint with a high-speed flow medium guide device according to claim 1, characterized in that: The guide plate (2) is a curved surface.

3. The expansion joint with a high-speed flow medium guide device according to claim 2, characterized in that: The cross section of the guide plate (2) is in the shape of an arc, and the rotation angle of the guide plate (2) ranges from 30° to 90°.

4. The expansion joint with a high-speed flow medium guide device according to claim 2, characterized in that: The three-way assembly (1) is T-shaped, and the axisymmetric line of the cross section of the guide plate (2) is at an angle of 45° to the flow direction of the medium in the pipeline.

5. The expansion joint with a high-speed flow medium guide device according to claim 2, characterized in that: The surface of the guide plate (2) perpendicular to the medium flow direction is streamlined.

6. The expansion joint with a high-speed flow medium guide device according to claim 1, characterized in that: A plurality of guide plates (2) are arranged inside the three-way assembly (1).

7. The expansion joint with a high-speed flow medium guide device according to claim 6, characterized in that: Three guide plates (2) are arranged inside the three-way assembly (1).

8. The expansion joint with a high-speed flow medium guiding device according to claim 6, characterized in that: The guide plates (2) are evenly distributed in parallel inside the three-way assembly (1).

9. The expansion joint with a high-speed flow medium guide device according to claim 1, characterized in that: The three-way assembly (1) is welded to the two side surfaces of the guide plate (2).

10. The expansion joint with a high-speed flow medium guiding device according to claim 1, characterized in that: The three-way assembly (1) is detachably connected to the guide plate (2).

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