Rotational flow preventer

Abstract

The utility model provides a rotational flow preventer which comprises one or at least two rotational flow preventing pieces, and each rotational flow preventing piece comprises a first annular plate, a second annular plate, a plurality of rib plates and a flange connecting part. When the number of the rotational flow preventing piece is one, the first annular plate, the second annular plate and the flange connecting part of the rotational flow preventing piece are all of an annular structure. And when the number of the rotational flow preventing pieces is at least two, all the rotational flow preventing pieces are mutually spliced to form an annular structure. The rotational flow preventer provided by the utility model comprises one or more rotational flow preventing pieces, and different forming modes are selected according to different nominal diameter sizes of the waterproof steel sleeve matched with the rotational flow preventer, so that the rotational flow preventer can be used in scenes with different requirements, and the rotational flow preventer is convenient to use. And a semi-closed structure is formed between the rib plate and the first annular plate in the rotational flow preventer, so that the risk of blockage of a runner due to deposition of sundries is reduced, and the sundries in the launder can be conveniently cleaned and dredged in time.

Description

Technical Field

[0001] This utility model relates to the field of swirling anti-swirl technology, and in particular to a swirling anti-swirl device. Background Technology

[0002] A vortex preventer is a special pipe fitting used to prevent vortex formation in water tanks during liquid transport and to prevent air from entering the pipeline. It is typically used at the outlet pipe of water tanks to eliminate vortex formation within the tank. Vortex preventers are widely used in chemical, energy, and water engineering fields, especially in fire-fighting water intake tanks. They ensure that the effective volume is fully utilized, improving the efficiency of fire-fighting water tanks, reducing dead water zones, and achieving land conservation. During rescue operations, fire-fighting water can be used to the maximum extent possible.

[0003] Currently, vortex preventers both domestically and internationally are broadly classified into two types. One type is a modular structure consisting of anti-vortex plate components, where square or round steel plates are welded together to form the vortex preventer. This modular structure requires on-site installation and has high requirements for the installation site, demanding that there be no debris obstructing the area near the anti-vortex plate during installation, and on-site installation is difficult. The other type is an integrated vortex preventer, which is generally supplied as a finished product. When installed outside the water tank, this integrated structure is easier to install and fix compared to the modular structure, reducing on-site construction work. However, this integrated structure has a narrow flow channel. When installed directly against the bottom of the water tank, debris from the tank bottom can easily enter the flow channel of the vortex preventer, causing blockages that are difficult to clean, leading to cavitation, flow interruption, and water hammer, seriously affecting the safety of the water supply system. Meanwhile, most of the dimensions of the integrated vortex preventer cannot be directly inserted into the manhole of the water tank (the maximum diameter or bevel of the manhole is no more than 1m). In other words, the vortex preventer cannot be directly installed in the water tank. It is necessary to enlarge the diameter of the manhole or cut part of the plate edge structure of the vortex preventer in order to successfully insert it into the water tank for installation. Utility Model Content

[0004] The purpose of this invention is to solve the shortcomings of existing integrated vortex preventers, such as narrow flow channels that are easily blocked by debris, and the difficulty in construction and installation of combined vortex preventers, and to provide a vortex preventer.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a swirling preventer, comprising one or at least two swirling preventer components, each comprising: a first annular plate having a mounting hole at its center; a second annular plate arranged parallel to the first annular plate, the second annular plate having a through hole concentrically arranged with the mounting hole; a plurality of ribs extending from the first annular plate to the second annular plate, wherein the cross-sectional area of ​​the ribs connected to the first annular plate is greater than the cross-sectional area of ​​the ribs connected to the second annular plate; and a flange connection portion disposed on the first annular plate or the second annular plate; when the number of swirling preventer components is one, the first annular plate, the second annular plate, and the flange connection portion of the swirling preventer component are all circular annular structures; when the number of swirling preventer components is at least two, the first annular plate, the second annular plate, and the flange connection portion of the swirling preventer component are all arc-shaped structures, and all the swirling preventer components are spliced ​​together to form a circular annular structure.

[0006] In one embodiment, when the nominal diameter of the mounting hole is less than 80 mm, the outer diameter of the first annular plate is 5 times the nominal diameter of the mounting hole; when the nominal diameter of the mounting hole is 80 mm to 350 mm, the outer diameter of the first annular plate is 4 times the nominal diameter of the mounting hole; when the nominal diameter of the mounting hole is 400 mm to 500 mm, the outer diameter of the first annular plate is 3 times the nominal diameter of the mounting hole; and when the nominal diameter of the mounting hole is 600 mm to 1000 mm, the outer diameter of the first annular plate is 1800 mm.

[0007] In one embodiment, when the nominal diameter of the mounting hole is less than 200 mm, the total number of ribs in the vortex preventer is four; when the nominal diameter of the mounting hole is 200 mm to 350 mm, the total number of ribs in the vortex preventer is six; and when the nominal diameter of the mounting hole is greater than 350 mm, the total number of ribs in the vortex preventer is eight.

[0008] In one embodiment, the flange connection is disposed at the first annular plate, the flange connection includes an installation pipe surrounding the mounting hole and a flange disposed at the end of the installation pipe, the flange having a plurality of evenly distributed first flange holes.

[0009] In one embodiment, the flange connection is disposed at the second annular plate, and the flange connection includes a plurality of second flange holes disposed on the second annular plate.

[0010] In one embodiment, the first annular plate, the second annular plate, the rib plate, and the flange connection of the swirling prevention component are integrally cast or welded together.

[0011] In one embodiment, when the outer diameter of the first annular plate is less than or equal to 600 mm, the number of swirling prevention components in the swirling preventer is one.

[0012] In one embodiment, when the outer diameter of the first annular plate is greater than or equal to 800 mm, the number of swirling prevention components in the swirling preventer is at least two.

[0013] In one embodiment, the swirl preventer further includes a connecting portion for connecting two adjacent swirl preventers. The connecting portion includes a lug respectively disposed on the two adjacent swirl preventers and a limiting rod passing through the two lugs. The lugs are fixed to the first annular plate of the swirl preventer and are located on the side of the first annular plate away from the second annular plate.

[0014] In one embodiment, when the outer diameter of the first annular plate is greater than 600 mm and less than 800 mm, the number of swirling prevention components in the swirling preventer is one or at least two.

[0015] The beneficial effects of the swirl preventer provided by this utility model are as follows:

[0016] 1. The vortex preventer includes one or more vortex preventer components. Different molding methods are selected according to the different sizes of the waterproof steel sleeves that the vortex preventer is adapted to, so that the vortex preventer can be used in different scenarios with different needs. It is convenient for the installation and transportation of the vortex preventer. It can be smoothly installed in the water tank through a small-sized manhole, solving the problem of needing to open a hole in the water tank for construction due to its large size.

[0017] 2. The ribs in the vortex preventer form a semi-enclosed structure with the first annular plate, and a flow channel is formed between the ribs and the first annular plate. The cross-sectional area of ​​the ribs gradually decreases from the first annular plate to the second annular plate, making the ribs triangular in shape. On the one hand, this can reduce the material used and the overall weight of the vortex preventer. On the other hand, it forms a larger flow space between the ribs and the flow channel, reducing the risk of debris accumulating and clogging the flow channel, and also making it easier to clean and unclog debris in the flow channel in a timely manner. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a vortex preventer provided in the first embodiment of this utility model;

[0019] Figure 2This is a front view of a swirl preventer provided in the first embodiment of this utility model;

[0020] Figure 3 This is a side view of a swirl preventer provided in the first embodiment of the present invention;

[0021] Figure 4 This is a three-dimensional structural schematic diagram of a vortex preventer provided in the second embodiment of this utility model;

[0022] Figure 5 This is a side view of a swirl preventer provided in the second embodiment of the present invention;

[0023] Figure 6 This is a three-dimensional structural diagram of a single swirling prevention component in a swirling prevention device provided in the second embodiment of this utility model;

[0024] Figure 7 This is a three-dimensional structural schematic diagram of a vortex preventer provided in the third embodiment of this utility model;

[0025] Figure 8 This is a front view of a swirl preventer provided in the third embodiment of this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 100, 200, 300 - Swirl preventer; 210 - First swirl preventer; 220 - Second swirl preventer;

[0028] 101, 211, 301 - First annular plate; 101A, 211A, 301A - Mounting holes;

[0029] D1 - outer diameter of the first annular plate, D0 - nominal diameter of the mounting hole;

[0030] 102, 212, 302 - Second annular plate; 102A, 212A, 302A - Through holes;

[0031] 103, 213, 303 - Ribs, 304 - Second flange hole;

[0032] 104, 214 - Flange connection; 104A, 214A - Mounting pipe;

[0033] 104B, 214B - Flange; 104C, 214C - First flange hole;

[0034] 230-Connecting part, 231-Lifting lug, 232-Limiting rod. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0036] See Figures 1-8 This invention provides a vortex preventer 100 (200, 300). The vortex preventer 100 (200, 300) provided by this invention varies depending on the application scenario and the nominal diameter of the waterproof steel sleeve it is adapted to. Figures 1-3 The swirl preventer 100 provided in the first embodiment of this utility model Figures 4-6 The swirl preventer 200 provided in the second embodiment of this utility model Figures 7-8 The swirling preventer 300 provided in the third embodiment of this utility model. The swirling preventers 100 (200) provided in the first and second embodiments are of the upper flange type, meaning they are suitable for installation where the water pipe is located above the swirling preventer 100 (200). The swirling preventer 300 provided in the third embodiment is of the lower flange type, meaning it is suitable for installation where the water pipe is located below the swirling preventer 300.

[0037] The present invention provides a vortex preventer 100 (200, 300), comprising one or at least two vortex preventers. In the first embodiment, the vortex preventer 100, and in the third embodiment, the vortex preventer 300, each comprises only one vortex preventer. Specifically, in the first embodiment, the vortex preventer 100 is a vortex preventer with a circular annular structure; in the third embodiment, the vortex preventer 300 is a vortex preventer with a circular annular structure. In the second embodiment, the vortex preventer 200 comprises two vortex preventers, both of which are semi-circular structures and symmetrically arranged. The two vortex preventers are joined together to form a closed circular annular structure. The number of vortex preventers in the vortex preventer 100 (200, 300) provided by the present invention is determined according to the nominal diameter of the waterproof steel sleeve it is adapted to. The larger the nominal diameter of the waterproof steel sleeve it is compatible with, the more vortex prevention components it has; conversely, the smaller the nominal diameter of the waterproof steel sleeve it is compatible with, the fewer vortex prevention components it has. For specific parameter settings, please refer to the following embodiments.

[0038] Example 1:

[0039] The following is combined Figures 1-3This invention describes a swirling preventer 100 provided in the first embodiment of the present invention. In this embodiment, the swirling preventer 100 is an integral structure, with one swirling preventer component. The nominal diameter D0 of the mounting hole 101A of the swirling preventer 100 is 150 mm, the outer diameter D1 of the first annular plate 101 is 600 mm, and the total number of ribs 103 is four, with an upper flange connection structure.

[0040] In this embodiment, the vortex preventer 100 includes a vortex-preventing component, meaning the vortex preventer 100 is itself a vortex-preventing component. This vortex-preventing component includes: a first annular plate 101, a second annular plate 102, a plurality of ribs 103, and a flange connection portion 104 disposed on the first annular plate 101. The vortex preventer 100 provided in this embodiment is suitable for use with waterproof steel sleeves with a nominal diameter less than DN150, and features an integrated structure for convenient transportation and assembly.

[0041] The number of swirling prevention components in the swirling preventer 100 provided by this utility model is related to the external dimensions of the first annular plate 101. When the outer diameter D1 of the first annular plate 101 is less than or equal to 600 mm, such as Figure 1 As shown, the number of swirling prevention components in the swirling preventer 100 is one. In this embodiment, the outer diameter D1 of the first annular plate 101 is 600 mm. When the number of swirling prevention components in the swirling preventer 100 is one, the first annular plate 101, the second annular plate 102, and the flange connection 104 of the swirling preventer are all annular structures. The first annular plate 101, the second annular plate 102, the flange connection 104, and the rib plate 103 can be integrally cast, or they can be independently cast and then welded together to form a finished product, which facilitates subsequent assembly and transportation. The plate thickness of the first annular plate 101, the second annular plate 102, and the rib plate 103 is determined according to actual needs, that is, to meet the stress requirements generated by the water pressure difference during installation. In this embodiment, the minimum plate thickness of the above three components is 6 mm.

[0042] like Figure 1 The diagram shown is a three-dimensional structural schematic of the vortex preventer 100 provided in the first embodiment of this utility model. The first annular plate 101 and the second annular plate 102 are arranged parallel to each other, and the outer diameter of the first annular plate 101 is larger than the outer diameter of the second annular plate 102. A mounting hole 101A is provided at the center of the first annular plate 101, and the second annular plate 102 has a through hole 102A concentrically arranged with the mounting hole 101A. The thickness of the first annular plate 101 is adaptively adjusted according to the outer diameter D1 of the first annular plate 101; that is, the larger the outer diameter D1 of the first annular plate 101, the larger the corresponding thickness of the first annular plate 101. This thickness is not limited here.

[0043] like Figure 2 The image shows a front view of the vortex preventer 100 provided by this utility model. The first annular plate 101 in the vortex preventer 100 is an anti-vortex plate, and the size of the first annular plate 101 is determined by the nominal diameter of the waterproof steel sleeve to which the vortex preventer 100 is adapted. That is, different sizes of vortex preventers 100 are selected according to the nominal diameter of the different waterproof steel sleeves to which they are adapted. The mounting hole 101A in the first annular plate 101 corresponds to the nominal diameter of the waterproof steel sleeve to which it is adapted.

[0044] When the nominal diameter D0 of the mounting hole 101A is less than 80mm, the outer diameter D1 of the first annular plate 101 is 5 times the nominal diameter D0 of the mounting hole 101A. That is, when the nominal diameter of the waterproof steel sleeve adapted to the vortex preventer 100 is less than DN80, the outer diameter D1 of the first annular plate 101 is 5 times the nominal diameter D0 of the mounting hole 101A.

[0045] When the nominal diameter D0 of the mounting hole 101A is 80mm-350mm, the outer diameter D1 of the first annular plate 101 is four times the nominal diameter D0 of the mounting hole 101A. That is, when the nominal diameter of the waterproof steel sleeve adapted to the vortex preventer 100 is between DN80 and DN350, the outer diameter D1 of the first annular plate 101 is four times the nominal diameter D0 of the mounting hole 101A. In this embodiment, the nominal diameter D0 of the mounting hole 101A is 150mm, and correspondingly, the outer diameter D1 of the first annular plate 101 is four times the nominal diameter D0 of the mounting hole 101A, that is, the outer diameter D1 of the first annular plate 101 is 600mm.

[0046] When the nominal diameter D0 of the mounting hole 101A is 400mm-500mm, the outer diameter D1 of the first annular plate 101 is 3 times the nominal diameter D0 of the mounting hole 101A; that is, when the nominal diameter of the waterproof steel sleeve adapted to the vortex preventer 100 is between DN400-DN500, the outer diameter D1 of the first annular plate 101 is 3 times the nominal diameter D0 of the mounting hole 101A.

[0047] When the nominal diameter D0 of the mounting hole 101A is 600mm-1000mm, the outer diameter D1 of the first annular plate 101 is 1800mm. That is to say, when the nominal diameter of the waterproof steel sleeve adapted to the vortex preventer 100 is between DN600 and DN1000, the outer diameter D1 of the first annular plate 101 is fixed at 1800mm.

[0048] like Figure 3The image shows a side view of the vortex preventer 100 provided by this utility model. The second annular plate 102 in the vortex preventer 100 is a support plate disposed below the vertical direction of the anti-vortex plate. The main function of the second annular plate 102 is to fix the rib plate and form a gap between it and the first annular plate 101 in the horizontal direction. The adjacent rib plate 103, the first annular plate 101, and the second annular plate 102 surround each other to form a flow channel through which water can flow.

[0049] like Figure 1 and Figure 3 As shown, the first annular plate 101 and the second annular plate 102 are concentrically arranged in the vertical direction, and a plurality of ribs 103 are provided between them. The ribs 103 extend from the first annular plate 101 to the second annular plate 102, and the cross-sectional area of ​​the ribs 103 connected to the first annular plate 101 is greater than the cross-sectional area of ​​the ribs 103 connected to the second annular plate 102. The plurality of ribs 103 can be integrally cast with the first annular plate 101 and the second annular plate 102, or they can be fixedly connected to the first annular plate 101 and the second annular plate 102 respectively by welding. The ribs 103 in the vortex preventer 100 provided by this utility model have a triangular structure, wherein the part with the largest cross-sectional area of ​​the rib 103 is located at the connection with the first annular plate 101, and the part with the smallest cross-sectional area of ​​the rib 103 is located at the connection with the second annular plate 102. The triangular rib 103 has two advantages. First, compared to the traditional square rib structure, it reduces the area of ​​the rib 103, thereby reducing its mass and the overall weight of the vortex preventer 100. Second, the cross-sectional area of ​​the rib 103 gradually decreases from the first annular plate 101 to the second annular plate 102, forming an opening below the first annular plate 101 that communicates with the flow channel. This transforms the vortex preventer 100 provided by this invention from a completely enclosed structure with a traditional square rib to a semi-enclosed structure with an opening below the anti-vortex plate. This semi-enclosed structure not only increases the flow area of ​​the flow channel in the vortex preventer 100, reducing the problem of flow channel blockage due to debris, but also, because of the triangular rib structure, facilitates the cleaning of blockages when debris accumulates in the flow channel. Furthermore, the triangular rib structure also provides space for the installation of the vortex preventer 100, facilitating the installation of the waterproof steel sleeve.

[0050] In the vortex preventer 100 provided by this utility model, the number of ribs 103 is determined by the nominal diameter of the waterproof steel sleeve to which the vortex preventer 100 is adapted. The nominal diameter D0 of the mounting hole 101A of the first annular plate 101 is the nominal diameter of the waterproof steel sleeve to which it is adapted.

[0051] When the nominal diameter D0 of the mounting hole 101A is less than 200mm, the total number of ribs 103 in the vortex preventer 100 is four. That is, when the nominal diameter of the waterproof steel sleeve adapted to the vortex preventer 100 is less than DN200, the total number of ribs 103 in the adapted vortex preventer 100 is four, and the four ribs 103 are evenly distributed circumferentially between the first annular plate 101 and the second annular plate 102. In this embodiment, the nominal diameter D0 of the mounting hole 101A is 150mm, corresponding to four ribs 103. Figure 1 and Figure 3 As shown, the four ribs 103 are arranged symmetrically in pairs and evenly distributed.

[0052] When the nominal diameter D0 of the mounting hole 101A is 200mm-350mm, the total number of ribs 103 in the vortex preventer 100 is six. That is, when the nominal diameter of the waterproof steel sleeve adapted to the vortex preventer 100 is between DN200-DN350, the total number of ribs 103 in the adapted vortex preventer 100 is six, and the six ribs 103 are evenly distributed along the circumference between the first annular plate 101 and the second annular plate 102.

[0053] When the nominal diameter D0 of the mounting hole 101A is greater than 350mm, the total number of ribs 103 in the vortex preventer 100 is eight. That is, when the nominal diameter of the waterproof steel sleeve to which the vortex preventer 100 is adapted is greater than DN350, the total number of ribs 103 in the adapted vortex preventer 100 is eight, and the eight ribs 103 are evenly distributed along the circumferential direction between the first annular plate 101 and the second annular plate 102.

[0054] In the vortex preventer 100 provided by this utility model, the height of the rib plate 103 is determined by the nominal diameter D0 of the mounting hole 101A of the first annular plate 101 of the vortex preventer 100.

[0055] When the nominal diameter D0 of the mounting hole 101A is less than 150mm, the height of the rib 103 is 100mm. That is, when the nominal diameter of the waterproof steel sleeve adapted to the vortex preventer 100 is less than DN150, the height between the first annular plate 101 and the second annular plate 102 is 100mm.

[0056] When the nominal diameter D0 of the mounting hole 101A is between 200mm and 300mm, the height of the rib 103 is 150mm. That is, when the nominal diameter of the waterproof steel sleeve adapted to the vortex preventer 100 is between DN200 and DN300, the height between the first annular plate 101 and the second annular plate 102 is 150mm.

[0057] When the nominal diameter D0 of the mounting hole 101A is between 300mm and 400mm, the height of the rib plate 103 is 200mm. That is, when the nominal diameter of the waterproof steel sleeve adapted to the vortex preventer 100 is between DN300 and DN400, the height between the first annular plate 101 and the second annular plate 102 is 200mm.

[0058] Similarly, for every 100mm increase in the nominal diameter D0 of the mounting hole 101A, the height between the first annular plate 101 and the second annular plate 102, i.e., the height of the rib 103, increases by 50mm.

[0059] Furthermore, such as Figure 1 As shown, the vortex preventer 100 provided by this utility model also includes a flange connection portion 104 disposed on the first annular plate 101. The flange connection portion 104 disposed on the first annular plate 101 is an upper flange structure.

[0060] like Figure 1-3 As shown, the flange connection 104 is disposed at the first annular plate 101. The flange connection 104 includes a mounting pipe 104A surrounding the mounting hole 101A and a flange 104B disposed at the end of the mounting pipe 104A. The flange 104B has a plurality of evenly distributed first flange holes 104C. The flange 104B is fixedly connected to the first annular plate 101 through the mounting pipe 104A, and has a plurality of first flange holes 104C. The number of first flange holes 104C on the flange 104B is related to the number of ribs 103. Generally, the number of first flange holes 104C is twice the number of ribs 103. In this embodiment, there are four ribs 103, and correspondingly, there are eight first flange holes 104C.

[0061] Example 2:

[0062] The following is combined Figures 4-6 This invention describes a swirling preventer 200 provided in the second embodiment of the present invention. In this embodiment, the swirling preventer 200 has a spliced ​​structure, the nominal diameter D0 of the mounting hole 201A of the swirling preventer 200 is 300mm, the outer diameter D1 of the first annular plate 201 is 1200mm, the total number of ribs 203 is 6, and it has an upper flange connection structure.

[0063] The vortex preventer 100 provided in this embodiment is suitable for use with waterproof steel sleeves with a nominal diameter greater than or equal to DN150. It has a spliced ​​structure, which is simple to assemble and easy to operate. The spliced ​​structure also makes the individual unit small in size, which is convenient to enter the water tank through the manhole and avoids the need to drill additional holes during installation.

[0064] The number of swirling prevention components in the swirling preventer 200 provided by this utility model is related to the external dimensions of the first annular plate 211. Preferably, when the outer diameter of the first annular plate 211 is greater than or equal to 800 mm, the number of swirling prevention components in the swirling preventer 200 is two. When the outer diameter of the first annular plate 211 is greater than or equal to 800 mm, the number of swirling prevention components in the swirling preventer 200 is at least two. When the number of swirling prevention components is at least two, the first annular plate, the second annular plate, and the flange connection of the swirling prevention components are all arc-shaped structures, and all the swirling prevention components are spliced ​​together to form a circular annular structure. In this embodiment, the swirling preventer 200 includes two swirling prevention components, a first swirling prevention component 210 and a second swirling prevention component 220. Figure 4-6 As shown, both the first vortex preventer 210 and the second vortex preventer 220 are semi-circular ring structures. The first vortex preventer 210 and the second vortex preventer 220 are arranged symmetrically along the center. After they are spliced ​​together along the central axis, they form a circular ring structure surrounding the central axis.

[0065] When the first swirling anti-swirl component 210 and the second swirling anti-swirl component 220 of the swirling anti-swirl device 200 provided by this utility model are spliced ​​and installed, a 2mm connection space is reserved between them in the horizontal direction. This connection space can be isolated by rubber pads or silicone pads.

[0066] like Figure 6 As shown, in this embodiment, the first annular plate 211 in the first vortex preventer 210 is a semi-circular ring structure. The nominal diameter of the mounting hole 211A of the first annular plate 211 is 300mm. Correspondingly, the outer diameter of the first annular plate 211 is four times the nominal diameter of the mounting hole 211A, that is, the outer diameter of the first annular plate 211 is 1200mm. Correspondingly, the total number of ribs 203 in the vortex preventer 200 is six. That is, there are three ribs 203 in the first vortex preventer 210 and three ribs 203 in the second vortex space 220, making the total number of ribs 203 in the vortex preventer 200 six.

[0067] In this embodiment, the through hole 212A of the second annular plate 212 in the first vortex prevention component 210 has the same nominal diameter as the mounting hole 211A of the first annular plate 211.

[0068] Furthermore, the vortex preventer 200 provided in the second embodiment of this utility model also includes a connecting portion 230 for connecting two adjacent vortex preventers. Since there are multiple vortex preventers in the vortex preventer 200, they need to be connected as a single unit using flanges during assembly. After the first annular plate 211 of the first vortex preventer 210 and the first annular plate of the second vortex preventer 220 are spliced ​​to form an annular anti-vortex plate, the pressure difference formed by the hydrostatic pressure above it and the negative pressure at the suction port generates a downward torque on the anti-vortex plate. During prolonged use, this torque can cause deformation of the bolts at the flange connection, thereby affecting the service life of the vortex preventer 200. Therefore, in this embodiment, the connecting portion 230 between two adjacent vortex preventers counteracts the aforementioned torque, thereby extending the service life of the vortex preventer 200. Figure 4 As shown, the connecting portion 230 includes lugs 231 respectively disposed on two adjacent swirling anti-swirl members and limiting rods 232 passing through the two lugs 231. The lugs 231 are fixed to the first annular plate 211 of the swirling anti-swirl member 210 and are located on the side of the first annular plate 211 away from the second annular plate 212. The arrangement of the connecting portion 230 can, on the one hand, help improve the tightness of the connection between the first swirling anti-swirl member 210 and the second swirling anti-swirl member 220, and on the other hand, it can counteract the torque generated on the first annular plate 211 due to the pressure difference, thereby extending the service life of the swirling anti-swirl device 200.

[0069] Furthermore, in this embodiment, the flange connection portion 214 is disposed on one side of the first annular plate 211 of the first vortex preventer 210. The flange connection portion 214 has a semi-annular structure, including a semi-annular mounting pipe 214A, a semi-annular flange 214B, and a first flange hole 214C disposed on the flange 214B. The flange connection portion 214 of the first vortex preventer 210 and the flange connection portion 214 of the second vortex preventer 220 are spliced ​​together to form an annular structure, so that the vortex preventer 200 provided in this embodiment forms an upper flange type structure.

[0070] Furthermore, when the vortex preventer 200 provided in the second embodiment of this utility model is installed in the water tank, it can be installed close to the bottom of the water tank. If conditions permit, an annular pad can be added to the bottom of the vortex preventer 200. The annular pad is located between the second annular plate 212 of the vortex preventer 200 and the bottom of the water tank. The height of the annular pad is 50mm-100mm, and the material of the annular pad is rubber, silicone, etc.

[0071] Example 3:

[0072] The following is combined Figure 7 and Figure 8This invention describes a swirling preventer 300 provided in the third embodiment of the present invention. In this embodiment, the swirling preventer 300 is an integral structure. The nominal diameter D0 of the mounting hole 301A of the swirling preventer 300 is 150 mm, the outer diameter D1 of the first annular plate 301 is 600 mm, the total number of ribs 203 is 4, and it is a lower flange type connection structure.

[0073] In this embodiment, the swirling preventer 300 includes a swirling preventer component, that is, the swirling preventer 300 is the swirling preventer component. The swirling preventer component includes: a first annular plate 301, a second annular plate 302, a plurality of ribs 303, and a flange connection portion 304 disposed on the first annular plate 301.

[0074] The through hole 302A of the second annular plate 302 is the same size as the mounting hole 301A of the first annular plate 301.

[0075] The difference between this embodiment and the first embodiment is that the flange connection part 304 is disposed at the second annular plate 302, and the flange connection part 304 includes a plurality of second flange holes disposed on the second annular plate 302. In this embodiment, the flange connection part 304 is located below the first annular plate 301 and is a lower flange structure. This structure makes it less likely for solid debris to enter, and makes cleaning and unblocking more convenient.

[0076] Example 4:

[0077] In this embodiment, the swirling preventer is an integral structure with one swirling preventer component. The nominal diameter of the mounting hole of the swirling preventer is 200mm, the outer diameter of the first annular plate is 800mm, the total number of ribs is 6, and it has an upper flange connection structure.

[0078] Example 5:

[0079] In this embodiment, the swirling preventer has a spliced ​​structure, with two swirling preventer components. The nominal diameter of the mounting hole of the swirling preventer is 200mm, the outer diameter of the first annular plate is 800mm, the total number of ribs is 6, and it has an upper flange connection structure.

[0080] Example 6:

[0081] In this embodiment, the swirling preventer has a spliced ​​structure, with two swirling preventer components. The nominal diameter of the mounting hole of the swirling preventer is 200mm, the outer diameter of the first annular plate is 800mm, the total number of ribs is 6, and it has a lower flange connection structure.

[0082] Example 7:

[0083] In this embodiment, the swirling preventer is an integral structure with one swirling preventer component. The nominal diameter of the mounting hole of the swirling preventer is 100mm, the outer diameter of the first annular plate is 400mm, the total number of ribs is 4, and it has an upper flange connection structure.

[0084] Example 8:

[0085] In this embodiment, the swirling preventer is an integral structure with one swirling preventer component. The nominal diameter of the mounting hole of the swirling preventer is 80mm, the outer diameter of the first annular plate is 400mm, the total number of ribs is 4, and it has an upper flange connection structure.

[0086] Example 9:

[0087] In this embodiment, the swirling preventer has a spliced ​​structure, with two swirling preventer components. The nominal diameter of the mounting hole of the swirling preventer is 400mm, the outer diameter of the first annular plate is 1200mm, the total number of ribs is 8, and it has an upper flange connection structure.

[0088] Example 10:

[0089] In this embodiment, the swirling preventer has a spliced ​​structure, with two swirling preventer components. The nominal diameter of the mounting hole of the swirling preventer is 500mm, the outer diameter of the first annular plate is 1500mm, the total number of ribs is 8, and it has a lower flange connection structure.

[0090] Example 11:

[0091] In this embodiment, the swirling preventer has a spliced ​​structure, with two swirling preventer components. The nominal diameter of the mounting hole of the swirling preventer is 600mm, the outer diameter of the first annular plate is 1800mm, the total number of ribs is 8, and it has an upper flange connection structure.

[0092] Example 12:

[0093] In this embodiment, the swirling preventer has a spliced ​​structure, with two swirling preventer components. The nominal diameter of the mounting hole of the swirling preventer is 800 mm, the outer diameter of the first annular plate is 1800 mm, the total number of ribs is 8, and it has a lower flange connection structure.

[0094] The vortex preventer 100 (200, 300) provided by this utility model includes one or more vortex preventer components. Different molding methods are selected according to the nominal diameter of the different waterproof steel sleeves that the vortex preventer 100 (200, 300) is adapted to, so that the vortex preventer 100 (200, 300) can be adapted to different needs and scenarios, making it convenient for the installation and transportation of the vortex preventer 100 (200, 300). It can be smoothly installed in the water tank through a small-sized manhole, solving the problem of needing to open a hole in the water tank for construction due to its large size.

[0095] The swirling preventer 100 (200, 300) provided by this utility model forms a semi-enclosed structure between the rib 103 and the first annular plate 101, and a flow channel is formed between the rib 103 and the first annular plate 101. The cross-sectional area of ​​the rib 103 gradually decreases from the cross-sectional area of ​​the first annular plate 101 to the second annular plate 102, making the rib 103 triangular in shape. On the one hand, it can reduce the material used and the overall weight of the swirling preventer 100. On the other hand, it forms a larger flow space between the rib 103 and the flow channel, reducing the risk of debris accumulating and clogging the flow channel, and also facilitating timely cleaning and unblocking of debris in the flow channel.

[0096] The above are merely preferred embodiments of the present utility model and are 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 vortex preventer, characterized in that, Includes one or at least two anti-swirl components, The swirl prevention component includes: A first annular plate, wherein a mounting hole is provided at the center of the first annular plate; The second annular plate is arranged parallel to the first annular plate, and the second annular plate has a through hole that is concentrically arranged with the mounting hole; A plurality of ribs, the ribs extending from the first annular plate to the second annular plate, and the cross-sectional area of ​​the ribs connected to the first annular plate being greater than the cross-sectional area of ​​the ribs connected to the second annular plate; And a flange connection portion disposed on the first annular plate or the second annular plate; When the number of the anti-vortex component is one, the first annular plate, the second annular plate, and the flange connection part of the anti-vortex component are all circular annular structures. When there are at least two swirling anti-swirl components, the first annular plate, the second annular plate, and the flange connection of the swirling anti-swirl components are all arc-shaped structures, and all the swirling anti-swirl components are spliced ​​together to form a circular annular structure.

2. The swirl preventer as described in claim 1, characterized in that, When the nominal diameter of the mounting hole is less than 80 mm, the outer diameter of the first annular plate is 5 times the nominal diameter of the mounting hole; When the nominal diameter of the mounting hole is 80mm-350mm, the outer diameter of the first annular plate is 4 times the nominal diameter of the mounting hole; When the nominal diameter of the mounting hole is 400mm-500mm, the outer diameter of the first annular plate is 3 times the nominal diameter of the mounting hole; When the nominal diameter of the mounting hole is 600mm-1000mm, the outer diameter of the first annular plate is 1800mm.

3. The swirl preventer as described in claim 1, characterized in that, When the nominal diameter of the mounting hole is less than 200 mm, the total number of ribs in the vortex preventer is four; When the nominal diameter of the mounting hole is 200mm-350mm, the total number of ribs in the vortex preventer is six; When the nominal diameter of the mounting hole is greater than 350 mm, the number of ribs in the vortex preventer is eight.

4. A swirl preventer as described in claim 1, characterized in that, The flange connection is located at the first annular plate. The flange connection includes an installation pipe surrounding the mounting hole and a flange at the end of the installation pipe. The flange has a plurality of evenly distributed first flange holes.

5. A swirl preventer as described in claim 1, characterized in that, The flange connection is located at the second annular plate, and the flange connection includes a plurality of second flange holes disposed on the second annular plate.

6. A swirl preventer as described in claim 1, characterized in that, The first annular plate, the second annular plate, the rib plate, and the flange connection of the swirling prevention component are integrally cast or welded together.

7. A swirl preventer as described in any one of claims 1-6, characterized in that, When the outer diameter of the first annular plate is less than or equal to 600 mm, the number of swirling prevention components in the swirling preventer is one.

8. A swirl preventer as described in any one of claims 1-6, characterized in that, When the outer diameter of the first annular plate is greater than or equal to 800 mm, the number of swirling prevention components in the swirling preventer is at least two.

9. A swirl preventer as described in claim 8, characterized in that, The swirling preventer further includes a connecting portion for connecting two adjacent swirling preventers. The connecting portion includes a lug respectively disposed on the two adjacent swirling preventers and a limiting rod passing through the two lugs. The lugs are fixed to the first annular plate of the swirling preventer and are located on the side of the first annular plate away from the second annular plate.

10. A swirl preventer as described in any one of claims 1-6, characterized in that, When the outer diameter of the first annular plate is greater than 600 mm and less than 800 mm, the number of swirling prevention components in the swirling preventer is one or at least two.

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