A flow velocity frame device for measuring flow rate using the flow velocity meter method

Abstract

This utility model discloses a flow velocity frame device for measuring flow rate using a flow velocity meter method. It includes two transverse telescopic components and two longitudinal telescopic components connected sequentially to form a rectangular outer frame. Four supporting telescopic components are movably connected between the two transverse telescopic components. All transverse, longitudinal, and supporting telescopic components can slide and extend along their axial directions. Each supporting telescopic component is detachably connected to multiple mounting components for fixing a propeller-type flow velocity meter. This flow velocity frame device can be applied to flow rate, velocity, and efficiency testing in water conservancy, hydropower, and municipal pumping station projects. Its overall size can be adjusted according to the dimensions of the flow channel on site, allowing for reuse.

Description

Technical Field

[0001] This utility model relates to the field of pump station engineering technology, specifically to a flow velocity frame device for measuring flow rate using the flow velocity meter method. Background Technology

[0002] Before any newly built or renovated pumping station is put into operation, a flow test must be conducted to verify whether the actual pumping capacity meets the design expectations and to ensure that its core functions meet engineering requirements. Furthermore, flow testing is also an essential verification step during routine maintenance and evaluation, operational condition adjustments, equipment troubleshooting, and safety assessments. Currently, pumping station flow measurement methods include the velocity meter method, ultrasonic method, salt concentration method, and differential pressure method. In practical testing, the velocity meter method is commonly used due to its higher data accuracy compared to other methods.

[0003] According to the "Regulations for On-site Testing and Safety Inspection of Pumping Stations" (SL548-2012), "For rectangular flow channels (pipelines), when the length of the short side is greater than 0.8m, the number of measuring points should not be less than 26. A flow measuring frame should be made to fix the flow meter. The flow measuring frame should have sufficient rigidity and strength and be able to be effectively fixed. During flow measurement, the flow measuring frame should not have any deformation or vibration that would affect the measurement uncertainty."

[0004] However, the fabrication of the velocity frame is a complex and time-consuming process, requiring a significant investment of manpower in design, processing, and on-site installation. It also consumes a considerable amount of material resources. Since the design dimensions of the velocity cross-section of each pump station are different, each pump station needs to be remade according to the on-site flow channel dimensions when conducting flow tests, and it cannot be reused, which greatly increases the testing cost and causes a waste of resources and time. Utility Model Content

[0005] To address the aforementioned technical issues, this invention provides a flow velocity frame device for measuring flow rate using the flow velocity meter method. This solves the problems of traditional flow velocity frames having fixed dimensions, being unable to adapt to cross-sectional flow channels, and incurring large manufacturing workloads and high costs.

[0006] A flow velocity frame device for measuring flow rate using a flow velocity meter method includes two transverse telescopic components and two longitudinal telescopic components connected in sequence to form a rectangular outer frame. Four supporting telescopic components are movably connected between the two transverse telescopic components. The transverse telescopic components, longitudinal telescopic components, and supporting telescopic components can all slide and extend along their axial directions. Each supporting telescopic component is detachably connected to multiple mounting components for fixing a propeller-type flow velocity meter.

[0007] A further technical solution is as follows: the transverse telescopic component, the longitudinal telescopic component, and the support telescopic component all include two sets of telescopic units that are symmetrically connected. Each set of telescopic units is a three-stage telescopic structure, including three sliding tubes that are sequentially sleeved from the outside to the inside. Each sliding tube can slide relative to the other and be locked by fasteners. The openings of the smallest sliding tubes of the two sets of telescopic units are connected and fixed.

[0008] A further technical solution is: the pipe openings of the smallest section of the sliding tube of the two sets of telescopic units are aligned and spliced ​​together, and multiple connection holes are opened on the pipe wall at the splicing point. A connecting plate is connected to the connection holes on both sides by connecting bolts.

[0009] A further technical solution is: the fastener includes fixing holes spaced apart on the side walls of each slide tube, fastening bolts passing through the fixing holes of two adjacent slide tubes, and fastening nuts connected to the ends of the fastening bolts.

[0010] A further technical solution is: each of the two sides of the tube wall of the largest sliding tube of each supporting telescopic component is provided with a docking plate, and the docking plate is provided with a through hole, which corresponds to the fixing hole on the transverse telescopic component and is fixedly connected by docking bolts.

[0011] A further technical solution is as follows: the mounting assembly includes a first mounting screw fixedly mounted on the connecting plates of the two supporting telescopic components located on both sides, and a second mounting screw passing through the corresponding fixing hole of each supporting telescopic component. A mounting sleeve is sleeved on both the first and second mounting screws. A support rod is fixedly mounted on the outer wall of the mounting sleeve. A first mounting nut is provided on the top of the mounting sleeve and threadedly connected to the first or second mounting screw. The bottom of the second mounting screw is connected to the slide tube through the second mounting nut.

[0012] A further technical solution is that the mounting components on the four supporting telescopic components are symmetrically distributed around the vertical central axis of the outer frame.

[0013] A further technical solution is: lifting lugs are provided on both sides of the top of the outer frame, and lifting holes are provided on the lifting lugs.

[0014] The beneficial effects of this utility model are: The flow velocity frame device of this utility model, by setting up a transverse telescopic component, a longitudinal telescopic component, and a support telescopic component composed of a multi-stage telescopic structure, allows the outer frame of the flow velocity frame to be adjusted laterally and longitudinally according to the cross-sectional size of the flow channel, making it adaptable to rectangular flow channels of different sizes. The support telescopic component can also adjust its length and position according to the size of the outer frame. The support telescopic component is equipped with a mounting component for connecting a propeller-type flow velocity meter. The position of the mounting component can be adjusted as needed, thus making it suitable for flow channels of various cross-sectional sizes and enabling reuse.

[0015] The flow velocity frame device of this utility model can be used for testing flow rate, flow velocity, and efficiency in water conservancy, hydropower, municipal and other pumping station projects. The overall size can be changed according to the size of the flow channel on site, so as to achieve reuse. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the flow velocity frame; Figure 2 This is a front view of the flow meter. Figure 3 This is a side view of the flow meter. Figure 4 This is a schematic diagram of the mounting components on the connecting plate; Figure 5 This is a schematic diagram of the mounting components on the slide tube.

[0017] In the picture: 1. Lateral telescopic assembly; 2. Longitudinal telescopic assembly; 3. Support telescopic assembly; 4. Slide tube; 5. Fixing hole; 6. Connecting plate; 7. Connecting bolt; 8. Fastening bolt; 9. Butt joint piece; 10. Mounting assembly; 11. First mounting screw; 12. Second mounting screw; 13. Mounting cylinder; 14. Support rod; 15. First mounting nut; 16. Second mounting nut; 17. Lifting lug; 18. Flow meter. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0019] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] A flow velocity frame device for measuring flow rate using the flow velocity meter method, such as Figure 1-5 As shown, it includes two transverse telescopic components 1 and two longitudinal telescopic components 2 connected in sequence to form a rectangular outer frame. Four supporting telescopic components 3 are movably connected between the two transverse telescopic components 1. The transverse telescopic components 1, the longitudinal telescopic components 2 and the supporting telescopic components 3 can all slide and extend along their axial directions. Each supporting telescopic component 3 is detachably connected to multiple mounting components 10 for fixing the propeller flow meter 18.

[0022] The lateral telescopic assembly 1, the longitudinal telescopic assembly 2, and the supporting telescopic assembly 3 each include two symmetrically connected sets of telescopic units. Each set of telescopic units has a three-stage telescopic structure, including three sliding tubes 4 that are sequentially nested from the outside to the inside. The sliding tubes 4 can slide relative to each other and are locked by fasteners. The smallest sliding tube 4 of the two sets of telescopic units is fixedly connected by a butt joint. The openings of the smallest sliding tubes 4 of the two sets of telescopic units are aligned and spliced ​​together. Multiple connection holes are provided on the tube wall at the splicing point. A connecting plate 6 is connected to the connection holes on both sides by connecting bolts 7, and the connection plate 6 achieves a stable connection between the two sets of telescopic units.

[0023] The slide tube 4 is made of a rectangular hollow steel tube with a thickness of 5mm. In one embodiment, the cross-sectional dimensions of the three slide tube sections 4 of the telescopic unit of the transverse telescopic component 1 or the longitudinal telescopic component 2, from the outside to the inside, are 150*150mm, 140*140mm, and 130*130mm, respectively. The cross-sectional dimensions of the three slide tube sections 4 of the telescopic unit supporting the telescopic component 3, from the outside to the inside, are 100*100mm, 90*90mm, and 80*80mm, respectively.

[0024] The fasteners include fixing holes 5 spaced apart on the side walls of each slide tube 4, fastening bolts 8 passing through the fixing holes 5 of two adjacent slide tubes 4, and fastening nuts connected to the ends of the fastening bolts 8.

[0025] Each of the largest sections of the sliding tube 4 of each supporting telescopic assembly 3 has a connecting plate 9 on both sides of its tube wall. The connecting plate 9 has through holes that correspond to the fixing holes 5 on the transverse telescopic assembly 1 and are fixedly connected by connecting bolts. The horizontal position of the supporting telescopic assembly 3 can be adjusted by using the connecting plates 9 and connecting bolts.

[0026] The mounting assembly 10 includes two first mounting screws 11 fixed to the connecting plates 6 of the two supporting telescopic assemblies 3 located on both sides, and 24 second mounting screws 12 passing through the corresponding fixing holes 5 of the supporting telescopic assemblies 3. Each of the first and second mounting screws 12 is fitted with a mounting sleeve 13. A support rod 14 is fixedly mounted on the outer wall of the mounting sleeve 13, parallel to the transverse supporting assembly 1. The top of the mounting sleeve 13 is provided with a first mounting nut 15 threadedly connected to the first or second mounting screw. The bottom of the second mounting screw 12 is fixedly connected to the slide tube 4 via a second mounting nut 16. The support rod 14 is used to connect the propeller flow meter 18. In one embodiment, the support rod 14 may be provided with scale markings to calibrate the installation position of the propeller flow meter 18, ensuring that the propeller flow meters in the same row are on the same straight line. The propeller flow meter 18 is a flow meter from the prior art, and its tail is provided with a clamping hole and a clamping element.

[0027] like Figure 1 and Figure 2 As shown, the mounting components 10 on the four supporting telescopic components 3 are symmetrically distributed with the vertical central axis of the outer frame as the center.

[0028] The top two sides of the outer frame are symmetrically provided with lifting lugs 17, and the lifting lugs 17 are provided with lifting holes. The two lifting lugs 17 are respectively welded and fixed to the upper surface of the two largest sections of the sliding tubes 4 of the transverse telescopic component 1 located at the top of the outer frame. The lifting lugs 17 are staggered from the fixing holes 5 on the transverse telescopic component 1.

[0029] During use, the lengths of the telescopic units of the transverse telescopic component 1, longitudinal telescopic component 2, and supporting telescopic component 3 are adjusted according to the size of the flow channel cross-section, so that the size of the outer frame adapts to the cross-sectional size of the flow channel. Then, according to the size of the outer frame and the testing specifications, the 26 mounting components 10 are installed at the corresponding positions on the four supporting telescopic components 3. The propeller-type flow meter 18 is then passed through the clamping hole at its tail end through the support rod 14 of the mounting component 10 and tightened using clamps. The wires of the propeller-type flow meter 18 are secured to the slide pipe 4 with tape. During use, the entire flow meter device is placed in water for testing by connecting the lifting equipment to the lifting hole.

[0030] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A flow velocity frame device for measuring flow rate using the flow velocity meter method, characterized in that, It includes two transverse telescopic components and two longitudinal telescopic components connected in sequence to form a rectangular outer frame. Four supporting telescopic components are movably connected between the two transverse telescopic components. The transverse telescopic components, longitudinal telescopic components and supporting telescopic components can all slide and extend along their axial directions. Each supporting telescopic component is detachably connected to multiple mounting components for fixing the propeller flow meter.

2. The flow velocity frame device for measuring flow rate using the flow velocity meter method according to claim 1, characterized in that, The lateral telescopic assembly, longitudinal telescopic assembly, and support telescopic assembly all include two sets of telescopic units that are symmetrically connected. Each set of telescopic units is a three-stage telescopic structure, including three sliding tubes that are sequentially sleeved from the outside to the inside. Each sliding tube can slide relative to the other and be locked by fasteners. The openings of the smallest sliding tubes of the two sets of telescopic units are connected and fixed.

3. The flow velocity frame device for measuring flow rate using the flow velocity meter method according to claim 2, characterized in that, The pipe openings of the smallest section of the two telescopic units are aligned and joined together. Multiple connection holes are provided on the pipe wall at the joint, and a connecting plate is connected to both sides of the connection holes by connecting bolts.

4. A flow velocity frame device for measuring flow rate using the flow velocity meter method according to claim 2, characterized in that, The fasteners include fixing holes spaced apart on the side walls of each slide section, fastening bolts passing through the corresponding fixing holes of two adjacent slide sections, and fastening nuts connected to the ends of the fastening bolts.

5. A flow velocity frame device for measuring flow rate using the flow velocity meter method according to claim 4, characterized in that, Each of the largest sliding tubes supporting the telescopic component has a connecting plate on both sides of its tube wall. The connecting plate has a through hole, which corresponds to the fixing hole on the transverse telescopic component and is fixedly connected by connecting bolts.

6. A flow velocity frame device for measuring flow rate using the flow velocity meter method according to claim 4, characterized in that, The mounting assembly includes a first mounting screw fixedly mounted on the connecting plates of two supporting telescopic components located on both sides, and a second mounting screw passing through the corresponding fixing hole of each supporting telescopic component. A mounting sleeve is fitted on both the first and second mounting screws. A support rod is fixedly mounted on the outer wall of the mounting sleeve. A first mounting nut is provided on the top of the mounting sleeve and threadedly connected to the first or second mounting screw. The bottom of the second mounting screw is connected to the slide tube through the second mounting nut.

7. A flow velocity frame device for measuring flow rate using the flow velocity meter method according to claim 1, characterized in that, The mounting components on the four supporting telescopic components are symmetrically distributed around the vertical central axis of the outer frame.

8. A flow velocity frame device for measuring flow rate using the flow velocity meter method according to claim 1, characterized in that, The top two sides of the outer frame are equipped with lifting lugs, and the lifting lugs have lifting holes.

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