Elbow pipe fitting assembly capable of effectively reducing impact force of water flow

Abstract

The utility model relates to the technical field of elbow pipe fittings, in particular to an elbow pipe fitting assembly capable of effectively reducing impact force of water flow, which comprises a main elbow pipe, an anti-impact mechanism is arranged in the main elbow pipe, and the anti-impact mechanism comprises a first pressure reduction arc plate fixedly connected in the turning position of the main elbow pipe. A second pressure reducing arc plate is arranged below the first pressure reducing arc plate, and a third pressure reducing arc plate is arranged below the second pressure reducing arc plate. According to the utility model, the main bent pipe is matched with the anti-impact mechanism, and the matching spacing of the first pressure-reducing arc plate, the second pressure-reducing arc plate and the third pressure-reducing arc plate is decreased progressively, so that the momentum gradient release is realized, the flow guide groove induces micro-vortex, and the boundary stratification is reduced; the streamline is optimized through the asymmetric wing type design of the first pressure reduction arc plate, the second pressure reduction arc plate and the third pressure reduction arc plate, flow separation of the fixed flow guide plate under the variable flow is avoided, and cavitation bubbles are damaged in a grading mode through the first pressure reduction groove, the second pressure reduction groove and the third pressure reduction groove.

Description

Technical Field

[0001] This utility model relates to the field of elbow pipe fittings technology, specifically to an elbow pipe fitting assembly that effectively reduces the impact force of water flow. Background Technology

[0002] In industrial piping systems, elbows, as key components for changing fluid direction, have long faced a series of problems caused by excessive water flow impact. The abrupt change in the internal flow field of a traditional 90° elbow can trigger dynamic pressure shocks up to 4-6 times that of the straight pipe section. This not only causes mechanical hazards such as pipe vibration and loosening of flange connections, but also generates significant energy loss (pressure loss coefficient exceeding 0.9). Especially in high-pressure transmission systems, the cavitation phenomenon induced by water flow impact accelerates the erosion of pipe wall materials, significantly shortening equipment lifespan.

[0003] As pipeline systems develop towards higher pressure and larger scale, traditional structures are revealing their technical bottlenecks: flow guiding components with fixed geometric parameters cannot adapt to varying operating conditions, and their performance deteriorates sharply when the flow velocity exceeds the design range by 30%.

[0004] Therefore, it is necessary to invent an elbow fitting assembly that effectively reduces the impact force of water flow to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an elbow pipe fitting assembly that effectively reduces the impact force of water flow. By cooperating with the main bend and the anti-impact mechanism, the impact is dissipated in stages, thereby solving the problem that the flow guiding components with fixed geometric parameters in the prior art cannot adapt to the requirements of variable working conditions and that the performance deteriorates sharply when the flow velocity exceeds the design range by 30%.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an elbow pipe fitting assembly that effectively reduces the impact force of water flow, comprising a main elbow, wherein an anti-impact mechanism is provided inside the main elbow, the anti-impact mechanism comprising a first pressure-reducing arc plate fixedly connected to the inside of the bend of the main elbow, a second pressure-reducing arc plate disposed below the first pressure-reducing arc plate, and a third pressure-reducing arc plate disposed below the second pressure-reducing arc plate, wherein the volumes of the first, second, and third pressure-reducing arc plates increase sequentially, the second and third pressure-reducing arc plates are both fixedly connected to the inner sidewall of the main elbow, the blade spacing of the first, second, and third pressure-reducing arc plates decreases along the flow direction, the leading edges of the first, second, and third pressure-reducing arc plates are thicker than the trailing edges, and a plurality of sets of guide grooves are formed on the surface of the leading edges of the first, second, and third pressure-reducing arc plates, thereby achieving the release of the momentum gradient of the water flow through the cooperation of the first, second, and third pressure-reducing arc plates.

[0007] Preferably, the inlet end of the main bend is provided with several sets of first pressure-reducing grooves, and several sets of second pressure-reducing grooves are provided below the first pressure-reducing grooves. The first pressure-reducing grooves and the second pressure-reducing grooves work together to initially break up cavitation.

[0008] Preferably, several sets of third pressure-reducing grooves are provided below the several sets of second pressure-reducing grooves. Both the second and third pressure-reducing grooves are opened on the inner side wall of the main bend, and pressure reduction is further achieved through the third pressure-reducing grooves.

[0009] Preferably, the depths of the first pressure-reducing groove, the second pressure-reducing groove, and the third pressure-reducing groove increase sequentially, and an installation ring is fitted on the outer wall of the main bend to protect the main bend.

[0010] Preferably, the mounting ring has several sets of reinforcing grids fixedly connected inside, the reinforcing grids being honeycomb-shaped, which reinforce the interior of the mounting ring.

[0011] Preferably, the interior of the reinforcing grid is filled with buffer filler, and the spaces between the reinforcing grids are filled with elastic filler, so that the impact energy is absorbed by the deformation of the buffer filler and the elastic filler.

[0012] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0013] By cooperating with the main bend and the impact-resistant mechanism, and by decreasing the spacing between the first, second, and third pressure-reducing arc plates, momentum gradient release is achieved. The guide channel induces micro-vortices, reducing boundary layer separation. The asymmetric airfoil design of the first, second, and third pressure-reducing arc plates optimizes the streamline shape, avoiding flow separation under variable flow conditions with a fixed guide plate. The first, second, and third pressure-reducing channels are used to break up cavitation in stages. The combination of reinforcing grid and elastic packing absorbs mechanical vibration energy. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a schematic diagram of the internal structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the mounting ring structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the first pressure-reducing arc plate structure of this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Main bend; 2. Impact-resistant mechanism; 201. First pressure-reducing arc plate; 202. Second pressure-reducing arc plate; 203. Third pressure-reducing arc plate; 204. Guide channel; 205. First pressure-reducing channel; 206. Second pressure-reducing channel; 207. Third pressure-reducing channel; 3. Mounting ring; 4. Reinforcing grid; 5. Buffer packing; 6. Elastic packing. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0022] This utility model provides, for example Figure 1-4 The illustrated elbow pipe fitting assembly for effectively reducing water flow impact includes a main elbow 1. An anti-impact mechanism 2 is installed inside the main elbow 1. The anti-impact mechanism 2 includes a first pressure-reducing arc plate 201 fixedly connected to the inside of the bend in the main elbow 1. A second pressure-reducing arc plate 202 is located below the first pressure-reducing arc plate 201, and a third pressure-reducing arc plate 203 is located below the second pressure-reducing arc plate 202. The volumes of the first pressure-reducing arc plate 201, the second pressure-reducing arc plate 202, and the third pressure-reducing arc plate 203 increase sequentially. Both the second and third pressure-reducing arc plates 202 and 203 are fixedly connected to the inner wall of the main elbow 1. The blade spacing of the first and second pressure-reducing arc plates 201 and 202, and the second and third pressure-reducing arc plates 202 and 203 decreases along the flow direction. The leading edge of the first and second pressure-reducing arc plates 201, 202, and 203 is thicker than their trailing edges. Several sets of guide grooves 204 are formed on the surface of the leading edge of the plate 202 and the third pressure reducing arc plate 203. The momentum gradient of the water flow is released through the cooperation of the first pressure reducing arc plate 201, the second pressure reducing arc plate 202 and the third pressure reducing arc plate 203. Several sets of first pressure reducing grooves 205 are formed inside the water inlet end of the main bend pipe 1. Several sets of second pressure reducing grooves 206 are set below the first pressure reducing grooves 205. The first pressure reducing grooves 205 and the second pressure reducing grooves 206 work together to initially break cavitation. Several sets of third pressure reducing grooves 207 are set below the several sets of second pressure reducing grooves 206. The second pressure reducing grooves 206 and the third pressure reducing grooves 207 are both formed on the inner side wall of the main bend pipe 1. Pressure reduction is further achieved through the third pressure reducing grooves 207. The depth of the first pressure reducing grooves 205, the second pressure reducing grooves 206 and the third pressure reducing grooves 207 increases sequentially. An installation ring 3 is fitted on the outer side wall of the main bend pipe 1 to protect the main bend pipe 1.

[0023] Refer to the instruction manual appendix Figure 1-4 The depths of the first pressure-reducing groove 205, the second pressure-reducing groove 206, and the third pressure-reducing groove 207 increase sequentially. An installation ring 3 is fitted onto the outer wall of the main bend 1 to protect it. Several sets of reinforcing grids 4 are fixedly connected inside the installation ring 3. These reinforcing grids 4 are honeycomb-shaped and reinforce the interior of the installation ring 3. The interior of each reinforcing grid 4 is filled with buffer filler 5, and elastic filler 6 is filled between the reinforcing grids 4. The impact energy is absorbed through the deformation of the buffer filler 5 and the elastic filler 6. This is achieved through the cooperation of the main bend 1 and the impact-resistant mechanism 2. The momentum gradient is released by decreasing the spacing between the first pressure-reducing arc plate 201, the second pressure-reducing arc plate 202, and the third pressure-reducing arc plate 203. The flow guide trough 204 induces micro-vortices and reduces boundary layer separation. The streamline shape is optimized by the asymmetric airfoil design of the first pressure-reducing arc plate 201, the second pressure-reducing arc plate 202, and the third pressure-reducing arc plate 203 to avoid flow separation under variable flow rate with a fixed flow guide plate. The cavitation is broken in stages by the first pressure-reducing groove 205, the second pressure-reducing groove 206, and the third pressure-reducing groove 207. The mechanical vibration energy is absorbed by the combination of the reinforcing grid 4 and the elastic packing 6.

[0024] The working principle of this practical application is as follows:

[0025] Refer to the instruction manual appendix Figure 1-4 When the water flows through the bend of the main bend 1, the first pressure-reducing arc plate 201 initially diverts the high-speed water flow and generates a controllable vortex through the leading edge guide channel 204. The volume of the second pressure-reducing arc plate 202 and the third pressure-reducing arc plate 203 increases step by step, the cross-sectional area of ​​the flow channel expands, the kinetic energy is gradually converted into static pressure, and the flow velocity decay curve is matched to avoid secondary impact. The first pressure-reducing channel 205 induces the initial generation of cavitation bubbles, and the depth of the second pressure-reducing channel 206 and the third pressure-reducing channel 207 increases. By expanding the collapse space, the shock wave energy is dispersed. The water flow impact force is transmitted to the honeycomb-shaped reinforcing grid 4, and the stress is dispersed through the Poisson effect of the cell structure. The viscoelastic deformation of the buffer packing 5 and the elastic packing 6 absorbs the residual vibration energy.

[0026] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A bend pipe fitting assembly for effectively reducing the impact force of water flow, comprising a main bend (1), characterized in that: An anti-impact mechanism (2) is provided inside the main bend (1). The anti-impact mechanism (2) includes a first pressure-reducing arc plate (201) fixedly connected inside the bend of the main bend (1). A second pressure-reducing arc plate (202) is provided below the first pressure-reducing arc plate (201), and a third pressure-reducing arc plate (203) is provided below the second pressure-reducing arc plate (202). The volumes of the first pressure-reducing arc plate (201), the second pressure-reducing arc plate (202), and the third pressure-reducing arc plate (203) increase sequentially. The volumes of the second pressure-reducing arc plate (202) and the third pressure-reducing arc plate (203) are... The pressure-reducing arc plates (203) are all fixedly connected to the inner wall of the main bend (1). The blade spacing between the first pressure-reducing arc plate (201) and the second pressure-reducing arc plate (202), and between the second pressure-reducing arc plate (202) and the third pressure-reducing arc plate (203) decreases along the flow direction. The front edge of the first pressure-reducing arc plate (201), the second pressure-reducing arc plate (202), and the third pressure-reducing arc plate (203) is thick and the rear edge is thin. Several sets of guide grooves (204) are opened on the surface of the front edge of the first pressure-reducing arc plate (201), the second pressure-reducing arc plate (202), and the third pressure-reducing arc plate (203).

2. The elbow pipe fitting assembly for effectively reducing water flow impact force according to claim 1, characterized in that: The main bend (1) has several sets of first pressure reducing grooves (205) inside the water inlet end, and several sets of second pressure reducing grooves (206) are provided below the first pressure reducing grooves (205).

3. The elbow pipe fitting assembly for effectively reducing water flow impact force according to claim 2, characterized in that: Several sets of third pressure-reducing grooves (207) are provided below the several sets of second pressure-reducing grooves (206), and the second pressure-reducing grooves (206) and the third pressure-reducing grooves (207) are both opened on the inner side wall of the main bend (1).

4. The elbow pipe fitting assembly for effectively reducing water flow impact force according to claim 2, characterized in that: The depths of the first pressure relief groove (205), the second pressure relief groove (206) and the third pressure relief groove (207) increase sequentially, and the outer wall of the main bend (1) is fitted with an installation ring (3).

5. The elbow pipe fitting assembly for effectively reducing water flow impact force according to claim 4, characterized in that: The mounting ring (3) has several sets of reinforcing grids (4) fixedly connected inside, and the reinforcing grids (4) are honeycomb-shaped.

6. The elbow pipe fitting assembly for effectively reducing water flow impact force according to claim 5, characterized in that: The interior of the reinforcing grid (4) is filled with buffer filler (5), and the space between the reinforcing grids (4) is filled with elastic filler (6).

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