A large-diameter assembled barrel type vortex preventer

Abstract

The utility model discloses a large pipe diameter assembling cylinder type cyclone preventer, including cyclone preventer main part and ring type flow guide portion, the upper end of cyclone preventer main part is equipped with the first flange for connecting pipeline, the lower extreme of cyclone preventer main part is equipped with the second flange for connecting ring type flow guide portion, ring type flow guide portion is spliced by multiple arc type flow guide blocks, sets up the flow vane in arc type flow guide block, and the left and right sides of each arc type flow guide block are equipped with splicing part, and the splicing part of arc type flow guide block is equipped with at least two bolt holes, two bolt holes are located arc type flow guide block's inner arc side and outer arc side respectively, and the bolt hole of arc type flow guide block's inner arc side is connected through the bolt hole of splicing part by bolt still with cyclone preventer main part's second flange. The utility model discloses simple structure has solved the cyclone preventer transportation, the difficult installation, the inconvenient maintenance problem.

Description

Technical Field

[0001] This utility model belongs to the technical field of water pump parts, specifically relating to a large-diameter assembled cylindrical vortex preventer. Background Technology

[0002] According to the national standard "Technical Specification for Fire Water Supply and Fire Hydrants" GB50974-2014 and the European Union standard EN12845, when the water pipe diameter is in the range of DN65-DN500, it is recommended to install a vortex preventer at the suction pipe inlet to eliminate vortexing, improve pump efficiency, and prevent cavitation. Because the vortex preventer uses two discs with a baffle plate between them, this structure not only prevents vortices from being generated by the rotation of the pump suction inlet, thus preventing air from entering the suction pipe, pump, or main outlet pipe, but also prevents water hammer and cavitation, ensuring stable water flow at the pump's inlet and outlet.

[0003] The disc structure dimensions of the anti-vortex device vary depending on the pipe diameter. For example, the disc diameter of the anti-vortex device for a DN300 suction pipe is greater than 900mm, while the disc diameter for a DN450 suction pipe reaches 1350mm. Anti-vortex devices are typically installed inside water tanks or pools, where the standard manhole size is only 600mm to 800mm. Because larger diameter anti-vortex devices have larger diameters, exceeding the standard manhole size, they cannot be installed after the water tank or pool is built, leading to two existing installation methods for anti-vortex devices:

[0004] The first approach involves using a customized method, which enlarges the size of the inspection holes for water tanks and pools and customizes non-standard manhole covers. However, this customization method increases the total number of covers, making it inconvenient for daily inspection and maintenance. Furthermore, the large-diameter covers and large-diameter vortex preventers are not easy to transport, increasing project costs.

[0005] The second type uses a vortex preventer installed simultaneously with the construction of a water tank or pool, but it cannot be replaced during later maintenance.

[0006] Both of the above methods have certain drawbacks, and there is an urgent need for a modular vortex preventer to solve these problems. Summary of the Invention

[0007] The purpose of this utility model is to address the shortcomings of existing technologies by providing a large-diameter assembled cylindrical vortex preventer with a simple structure, which solves the problems of difficult transportation, installation, and inconvenient maintenance of vortex preventers.

[0008] The technical solution adopted to achieve the purpose of this utility model is:

[0009] A large-diameter assembled cylindrical vortex preventer includes a vortex preventer body and an annular flow guide. The upper end of the vortex preventer body is provided with a first flange for connecting to a pipe, and the lower end of the vortex preventer body is provided with a second flange for connecting to the annular flow guide. The annular flow guide is composed of multiple arc-shaped flow guide blocks spliced ​​together. Flow guide blades are provided inside each arc-shaped flow guide block. Each arc-shaped flow guide block has a splicing part on its left and right sides. Each splicing part of the arc-shaped flow guide block has at least two bolt holes, located on the inner arc side and the outer arc side of the arc-shaped flow guide block, respectively. Adjacent arc-shaped flow guide blocks are connected by bolts passing through the bolt holes of the splicing parts. The bolt hole located on the inner arc side of the arc-shaped flow guide block is also connected to the second flange of the vortex preventer body by bolts.

[0010] Furthermore, the annular guide section is composed of two, three, four, five, six, seven, or eight arc-shaped guide blocks spliced ​​together.

[0011] Furthermore, the annular guide section is divided into multiple arc-shaped guide blocks according to the guide vanes, and each arc-shaped guide block is provided with a guide vane.

[0012] Furthermore, the splicing part of the arc-shaped guide block adopts an overlapping structure.

[0013] Furthermore, the splicing part on one side of the arc-shaped guide block is provided with a first positioning platform that protrudes outward or is recessed inward.

[0014] Furthermore, the connecting part of the second flange has a notch to form a second positioning platform for positioning the annular guide section.

[0015] Furthermore, a first sealing gasket is provided between the splicing portions of two adjacent arc-shaped flow guide blocks, and a second sealing gasket is provided between the inner arc side of the arc-shaped flow guide block and the second flange of the vortex preventer body.

[0016] The above technical solution has the following beneficial effects:

[0017] This utility model has a simple structure. It divides the swirling preventer into a main body and an annular guide section. The annular guide section is made up of multiple arc-shaped guide blocks that are bolted together on site. It is simple and convenient to install, and does not require custom-made water tanks or pools with inspection hole sizes, which reduces costs and transportation expenses. It also facilitates replacement operations during later maintenance.

[0018] The annular guide section is divided into multiple arc-shaped guide blocks according to the guide vanes. Each arc-shaped guide block is provided with a guide vane, which makes it easy to weld and fix each guide vane in the arc-shaped guide block in advance, making the connection more secure and easy to replace the guide vanes.

[0019] The annular guide section is composed of two, three, four, five, six, seven, or eight arc-shaped guide blocks. Each arc-shaped guide block can be disassembled according to the outer diameter of the annular guide section, which facilitates worker handling and reduces labor intensity.

[0020] The splicing part of the arc-shaped guide block adopts an overlapping structure, which is simple in structure and easy to process.

[0021] The arc-shaped guide block has a first positioning platform that protrudes outward or is recessed inward at one of its splicing parts. The second flange of the vortex preventer body has a notch to form a second positioning platform. Positioning is achieved by the first and second positioning platforms, which not only ensures that the inner diameter of each arc-shaped guide block is the same after splicing, but also facilitates bolt connection operations through positioning.

[0022] A first sealing gasket is provided between the splicing parts of two adjacent arc-shaped flow guide blocks, and a second sealing gasket is provided between the splicing part of the inner arc side of the arc-shaped flow guide block and the second flange of the vortex preventer body. The first sealing gasket and the second sealing gasket can effectively compensate for the workmanship and assembly tolerances and eliminate the leakage of fluid at the transverse and longitudinal interfaces at the module splice.

[0023] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of specific embodiment 1;

[0025] Figure 2 This is a cross-sectional view of AA in specific embodiment 1;

[0026] Figure 3 This is a top view of the main body of the vortex preventer in specific embodiment 1;

[0027] Figure 4 This is a partial schematic diagram of the annular guide section in specific embodiment 1;

[0028] Figure 5 This is a top view of the arc-shaped guide block in specific embodiment 1;

[0029] Figure 6 This is a schematic diagram of the splicing of the arc-shaped guide block in specific embodiment 1;

[0030] Figure 7 This is a schematic diagram showing the splicing of the inner arc side of the arc-shaped guide block with the second flange in specific embodiment 1.

[0031] In the attached diagram: 1 is the main body of the vortex preventer, 2 is the annular guide section, 2-1 is the arc-shaped guide block, 2-11 is the clamping plate, 2-2 is the guide blade, 2-3 is the first positioning platform, 3 is the first flange, 4 is the second flange, 4-1 is the second positioning platform, 5 is the bolt, and 6 is the bolt hole. Detailed Implementation Specific Implementation

[0033] See Figures 1 to 7 As shown, a large-diameter assembled cylindrical vortex preventer includes a vortex preventer body 1 and an annular flow guide 2. The upper end of the vortex preventer body 1 is provided with a first flange 3 for connecting the pipe. One first flange 3 is welded to the upper end of the vortex preventer body 1. The lower end of the vortex preventer body 1 is provided with a second flange 4 for connecting the annular flow guide. Two second flanges 4 for connecting the annular flow guide are welded to the lower end of the vortex preventer body 1. Both the first flange 3 and the second flange 4 are provided with bolt holes 6.

[0034] The annular guide section 2 has a diameter of 1400mm and is composed of multiple arc-shaped guide blocks 2-1. Each arc-shaped guide block 2-1 contains guide vanes 2-2. The annular guide section 2 can be composed of two, three, four, five, six, seven, or eight arc-shaped guide blocks 2-1. The division into different arc-shaped guide blocks 2-1 is selected based on the outer diameter of the vortex preventer, or based on the number of connection holes in the second flange 4; there is no limitation in this regard. Different numbers of guide vanes 2-2 can be provided within the annular guide section. In this specific embodiment, based on the division by the guide vanes 2-2, the annular guide section 2 is composed of eight arc-shaped guide blocks 2-1, each of which contains a guide vane 2-2. Each of the arc-shaped guide blocks 2-1 has a splicing portion on both its left and right sides. The splicing portions of the arc-shaped guide blocks 2-1 adopt an overlapping structure. In this specific embodiment, the splicing portion on the right side of one arc-shaped guide block 2-1 overlaps with the splicing portion on the left side of another arc-shaped guide block 2-1. Each of the splicing portions on both the left and right sides of the arc-shaped guide block 2-1 has at least two bolt holes 6. The two bolt holes 6 are located on the inner arc side and the outer arc side of the arc-shaped guide block 2-1, respectively. Adjacent arc-shaped guide blocks 2-1 are connected by bolts 5 passing through the bolt holes 6 of the splicing portions. The bolt hole 6 located on the inner arc side of the arc-shaped guide block 2-1 is also connected to the second flange 4 of the vortex preventer body 1 by bolts 5. In this specific embodiment: each arc-shaped guide block 2-1 includes upper and lower clamping plates, a cavity is formed between the upper and lower clamping plates, and guide blades 2-2 are welded between the upper and lower clamping plates. The left and right sides of the upper and lower clamping plates are provided with splicing parts, and the inner and outer arc sides of the splicing parts of the upper and lower clamping plates are respectively provided with bolt holes 6.

[0035] One side of the arc-shaped guide block 2-1 has a first positioning platform 2-3 that protrudes outward or is recessed inward. In this specific embodiment, the right side of each arc-shaped guide block 2-1 has a first positioning platform 2-3 that protrudes outward, and bolt holes 6 are provided on the first positioning platform 2-3. Between two adjacent arc-shaped guide blocks 2-1, the right side of the previous arc-shaped guide block 2-1 overlaps on the first positioning platform of the left side of the subsequent arc-shaped guide block 2-1, and then the two blocks are connected and fixed by bolts 5 passing through the bolt holes 6 of the arc-shaped guide blocks 2-1. The second flange 4 of the vortex preventer body 1 has a notch to form a second positioning platform. In this specific embodiment, the edge connection of the second flange 4 of the vortex preventer body 1 has a notch, and the inner arc side of the two adjacent arc-shaped guide blocks 2-1 and the second positioning platform 4-1 of the second flange 4 are fixedly connected by a bolt 5, which saves costs.

[0036] A first sealing gasket is provided between the joints of two adjacent arc-shaped guide blocks 2-1, and a second sealing gasket is provided between the inner arc side of the arc-shaped guide block 2-1 and the second flange 4 of the vortex preventer body 1. The first and second sealing gaskets seal the joint of the arc-shaped guide block 2-1 and the connection of the second flange of the vortex preventer body 1.

[0037] This utility model disassembles the vortex preventer into a vortex preventer body 1 and an annular guide part 2. The installer transports the vortex preventer body 1 and the annular guide part 2 through the manhole to the water tank (pool) for on-site installation.

[0038] The installation steps are as follows:

[0039] One by one, the arc-shaped guide blocks 2-1 of the annular guide section 2 are fixed to the main body 1 of the vortex preventer using bolt holes, bolts, and nuts. Then, the assembled vortex preventer is fixed to the suction pipe using the first flange 3. The diameter of each component of the arc-shaped guide block 2-1 is less than 800mm, which facilitates transportation to the water tank or pool through a conventional manhole and also facilitates on-site replacement of components during maintenance.

[0040] The material of the modular vortex preventer can be carbon steel, stainless steel, etc., depending on the application.

Claims

1. A large-diameter assembled cylindrical vortex preventer, characterized in that: The device includes a vortex preventer body and an annular flow guide. The upper end of the vortex preventer body is provided with a first flange for connecting to a pipe, and the lower end of the vortex preventer body is provided with a second flange for connecting to the annular flow guide. The annular flow guide is composed of multiple arc-shaped flow guide blocks spliced ​​together. Flow guide blades are provided inside each arc-shaped flow guide block. Each arc-shaped flow guide block has a splicing part on both its left and right sides. Each splicing part of the arc-shaped flow guide block has at least two bolt holes. The two bolt holes are located on the inner arc side and the outer arc side of the arc-shaped flow guide block, respectively. Adjacent arc-shaped flow guide blocks are connected by bolts passing through the bolt holes of the splicing parts. The bolt hole located on the inner arc side of the arc-shaped flow guide block is also connected to the second flange of the vortex preventer body by bolts.

2. The large-diameter assembled cylindrical vortex preventer according to claim 1, characterized in that: The annular guide section is composed of two, three, four, five, six, seven, or eight arc-shaped guide blocks spliced ​​together.

3. The large-diameter assembled cylindrical vortex preventer according to claim 1, characterized in that: The annular guide section is divided into multiple arc-shaped guide blocks according to the guide vanes, and each arc-shaped guide block is provided with a guide vane.

4. A large-diameter assembled cylindrical vortex preventer according to claim 1, characterized in that: The joint of the arc-shaped guide block adopts an overlapping structure.

5. A large-diameter assembled cylindrical vortex preventer according to claim 1 or 4, characterized in that: The arc-shaped guide block has a first positioning platform on one side of its splicing part that protrudes outward or is recessed inward.

6. A large-diameter assembled cylindrical vortex preventer according to claim 1, characterized in that: The connecting part of the second flange has a notch to form a second positioning platform for positioning the annular guide section.

7. A large-diameter assembled cylindrical vortex preventer according to claim 1, characterized in that: A first sealing gasket is provided between the splice portions of two adjacent arc-shaped flow guide blocks, and a second sealing gasket is provided between the inner arc side of the arc-shaped flow guide block and the second flange of the vortex preventer body.

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