A calibration device for ultrasonic flowmeter

Abstract

The present invention relates to the field of flow meters, and specifically to a calibration device for ultrasonic flow meters, comprising a standard ultrasonic flow meter, wherein a detachable connecting pipe is installed at one end of the standard ultrasonic flow meter away from a water inlet pipe joint, an ultrasonic flow meter to be measured is arranged on the side of the connecting pipe away from the standard ultrasonic flow meter, a second docking ring matching with a second flange is installed at one end of the connecting pipe close to the ultrasonic flow meter to be measured, a plurality of second plug posts are equidistantly installed in a circular shape on one side of the second docking ring, a first docking ring is provided on one side of the first flange away from the ultrasonic flow meter to be measured, a plurality of first plug posts are equidistantly installed in a circular shape on one side of the first docking ring, a water-passing part for adjusting the distance between the first docking ring and the first flange is installed on one side of the first docking ring away from the first flange. The present invention has the following beneficial effects: realizing rapid placement and removal of the ultrasonic flow meter to be measured and improving calibration efficiency.

Description

Technical Field

[0001] The invention relates to a calibration device for an ultrasonic flowmeter, belonging to the field of flowmeters. Background Art

[0002] Ultrasonic flowmeter is an instrument that uses ultrasonic technology to measure fluid flow. It transmits and receives ultrasonic signals, and calculates the velocity and flow of the fluid based on the propagation time or frequency change of the signal in the fluid. Before using the ultrasonic flowmeter, the flowmeter needs to be calibrated and calibrated. The commonly used flowmeter calibration method is the direct measurement method. Its basic principle is: let the fluid flow through the flowmeter to be tested and the standard flowmeter connected in series in the fluid pipeline at a constant flow rate, and compare the cumulative flow rate flowing through the flowmeter to be tested over a period of time with the actual cumulative flow rate flowing through the calibration device, so as to obtain the error of the flowmeter to be tested under the flow condition, adjust the flow rate of the fluid to perform multiple measurements at multiple flow rates, and calculate the final error of the flowmeter to be tested. During the calibration process, the flowmeter to be tested needs to disassemble and assemble the bolts connecting the pipeline and the flowmeter to be tested. At this time, many flowmeters to be tested will take a lot of time and effort to disassemble and assemble during the calibration process. Summary of the invention

[0003] In view of the deficiencies in the prior art, an object of the present invention is to provide a calibration device for an ultrasonic flowmeter to solve the problems raised in the above background technology.

[0004] In order to achieve the above-mentioned object, the present invention is implemented through the following technical solutions: a calibration device for an ultrasonic flowmeter, comprising a standard ultrasonic flowmeter, a detachable water inlet pipe joint is installed at one end of the standard ultrasonic flowmeter, a detachable connecting pipe is installed at the end of the standard ultrasonic flowmeter away from the water inlet pipe joint, an ultrasonic flowmeter to be tested is arranged on the side of the connecting pipe away from the standard ultrasonic flowmeter, a first flange and a second flange are installed at both ends of the ultrasonic flowmeter to be tested, a second docking ring matching the second flange is installed at one end of the connecting pipe close to the ultrasonic flowmeter to be tested, and one side of the second docking ring is A plurality of second plug posts are equidistantly installed in a ring shape, a plurality of second through holes matching with the second plug posts are equidistantly opened in a ring shape on one side of the second flange, and the plurality of second plug posts are respectively inserted in the plurality of second through holes, a first docking ring is provided on the side of the first flange away from the ultrasonic flow meter to be measured, a plurality of first plug posts are equidistantly installed in a ring shape on one side of the first docking ring, a plurality of first through holes matching with the first plug posts are equidistantly opened in a ring shape on one side of the first flange, and the plurality of first plug posts are respectively inserted in the first through holes, a water-passing part for adjusting the distance between the first docking ring and the first flange is installed on the side of the first docking ring away from the first flange.

[0005] Specifically, the water-passing component includes a first straight pipe, a first straight pipe is installed on a side of the first docking ring away from the first flange, a bellows is installed on an end of the first straight pipe away from the first docking ring, a second straight pipe is installed on an end of the bellows away from the first straight pipe, a first ear plate connected and fixed to the first straight pipe is sleeved on the first straight pipe, a second ear plate connected and fixed to the second straight pipe is sleeved on the second straight pipe, two cylinders are symmetrically installed on a side of the second ear plate away from the first ear plate, the movable end of the cylinder passes through the second ear plate and is connected to the first ear plate, the cylinder is arranged in parallel with the bellows, and a water collecting component is provided on the lower side of the bellows.

[0006] Specifically, the water collecting part includes a water collecting box, which is provided on the lower side of the corrugated pipe. The water inlet pipe joint, the second straight pipe, the standard ultrasonic flow meter and the ultrasonic flow meter to be tested are all arranged directly above the water collecting box. Two supports are symmetrically installed at the bottom of the water collecting box, and a drain pipe for connecting to a drainage pipe is installed at the lower position of one side of the water collecting box.

[0007] Specifically, a base plate is provided at the bottom of the water collecting tank, and a first support plate, a second support plate and a third support plate are installed on the upper surface of the base plate. The upper end of the first support plate is connected and fixed to the water inlet pipe joint, the upper end of the second support plate is processed with an arc groove, and the first straight pipe is slidably installed in the arc groove, the upper end of the third support plate is connected and fixed to the second straight pipe, and the base plate is connected to the water collecting tank through a connecting piece.

[0008] Specifically, the connecting member includes a vertical plate, and vertical plates are installed at the four corners of the upper surface of the base plate. The upper ends of the vertical plates are connected and fixed with horizontal plates, and the end of the horizontal plate away from the base plate extends to the outside of the water collecting tank, and an upper vertical hole is provided on the side of the upper surface of the horizontal plate away from the vertical plate, and a positioning ear is provided on the lower side of the upper vertical hole. The positioning ear is connected and fixed to the water collecting tank, and a lower vertical hole aligned with the upper vertical hole is provided on the upper surface of the positioning ear. A connecting screw is installed in the channel formed by the upper vertical hole and the lower vertical hole, and the lower end of the connecting screw extends to the lower side of the positioning ear and is threadedly connected with a nut, and there is a gap between the positioning ear and the horizontal plate.

[0009] Specifically, a fourth flange is installed at one end of the water inlet pipe joint away from the standard ultrasonic flow meter, a third flange is installed at one end of the second straight pipe away from the bellows, and the third flange and the fourth flange are both arranged directly above the water collecting tank.

[0010] Specifically, one side of the first docking ring is provided with a plurality of first circular holes equidistantly in a ring shape, one end of the first plug post is connected and fixed in the first circular hole, and one side of the second docking ring is provided with a plurality of second circular holes equidistantly in a ring shape, one end of the second plug post is connected and fixed in the second circular hole.

[0011] Beneficial effects of the present invention: 1. Place the ultrasonic flowmeter to be tested between the first straight pipe and the connecting pipe. After a certain flow rate of water flows through the standard ultrasonic flowmeter and the ultrasonic flowmeter to be tested in turn, observe the numerical difference between the ultrasonic flowmeter to be tested and the standard ultrasonic flowmeter, so as to provide a basis for adjusting the ultrasonic flowmeter to be tested.

[0012] 2. When the ultrasonic flowmeter to be tested is placed between the first straight pipe and the connecting pipe, the cylinder is controlled to contract, so that the cylinder drives the first straight pipe to move toward the second straight pipe, so that the length of the bellows is reduced, thereby expanding the distance between the first docking ring and the second docking ring. After the ultrasonic flowmeter to be tested is placed in the specified position, the cylinder is controlled to extend, so that the first plug post and the second plug post are respectively inserted into the first perforation and the second perforation, so that the ultrasonic flowmeter to be tested can be quickly installed between the connecting pipe and the first straight pipe, so that the ultrasonic flowmeter to be tested can be quickly taken in and placed, thereby improving the calibration efficiency.

[0013] 3. When water leaks due to sealing at the second straight pipe, the connection between the water inlet pipe joint and the water supply pipeline, and both ends of the standard ultrasonic flowmeter, the leaked water will drip into the water collecting tank. Then the water collected in the water collecting tank will be discharged to the collection container through the drainage pipe connected to the drain pipe to prevent the leaked water from dripping and flowing at will.

[0014] 4. Install the bottom plate in the water collecting tank, and use the first support plate to support the water inlet pipe joint, and use the second support plate and the third support plate to support the first straight pipe and the second straight pipe respectively to improve the stability of the structure.

[0015] 5. Align the upper vertical hole on the horizontal plate with the lower vertical hole on the positioning ear, then pass the connecting screws through the upper and lower vertical holes and tighten the nuts to complete the assembly of the horizontal plate and the positioning ears. That is, the relative position of the bottom plate and the water collecting tank is restricted. At this time, the connecting screws and nuts are both on the outside of the water collecting tank, which is convenient for disassembly and assembly of the connecting screws and nuts in an area with sufficient space, and prevent the connecting screws and nuts from being in a humid environment in the water collecting tank. At the same time, there is a gap between the positioning ear and the horizontal plate, which provides operating space for handling the connecting screws and nuts that are difficult to separate by truncation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 It is a structural schematic diagram of a calibration device for an ultrasonic flowmeter of the present invention; Figure 2 A three-dimensional diagram of a calibration device for an ultrasonic flowmeter according to the present invention from another viewing angle; Figure 3 It is a schematic diagram of assembling a second plug post, a second docking ring and a connecting pipe in a calibration device of an ultrasonic flowmeter of the present invention; Figure 4 It is a schematic diagram of the assembly of a bellows, a cylinder and a base plate in a calibration device of an ultrasonic flowmeter of the present invention; Figure 5 It is a stereoscopic diagram of an ultrasonic flowmeter to be tested in a calibration device of an ultrasonic flowmeter according to the present invention; In the figure: 1. standard ultrasonic flowmeter, 2. connecting pipe, 3. second docking ring, 4. ultrasonic flowmeter to be tested, 5. first docking ring, 6. first ear plate, 7. bellows, 8. third flange, 9. second straight pipe, 10. water collecting tank, 11. support, 12. cylinder, 13. drain pipe, 14. second ear plate, 15. first straight pipe, 16. first flange, 17. second flange, 18. nut, 19. positioning ear, 20. connecting screw, 21. horizontal plate, 22. fourth flange, 23. water inlet pipe joint, 24. bottom plate, 25. first support plate, 26. second support plate, 27. third support plate, 28. second plug column, 29. first plug column, 30. vertical plate, 31. second perforation, 32. first perforation. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0018] See also Figure 1 and Figure 2 The present invention provides a technical solution: a calibration device for an ultrasonic flowmeter, comprising a standard ultrasonic flowmeter 1, a detachable water inlet pipe joint 23 is installed at one end of the standard ultrasonic flowmeter 1, a fourth flange 22 is installed at the end of the water inlet pipe joint 23 away from the standard ultrasonic flowmeter 1, a detachable connecting pipe 2 is installed at the end of the standard ultrasonic flowmeter 1 away from the water inlet pipe joint 23, an ultrasonic flowmeter 4 to be tested is arranged on the side of the connecting pipe 2 away from the standard ultrasonic flowmeter 1, the ultrasonic flowmeter 4 to be tested is placed between the first straight pipe 15 and the connecting pipe 2, a certain flow of water flows through the standard ultrasonic flowmeter 1 and the ultrasonic flowmeter 4 to be tested in turn, and the numerical difference between the ultrasonic flowmeter 4 to be tested and the standard ultrasonic flowmeter 1 is observed, thereby providing a basis for adjusting the ultrasonic flowmeter 4 to be tested.

[0019] See also Figure 1-Figure 5A first flange 16 and a second flange 17 are respectively installed at both ends of the ultrasonic flowmeter 4 to be measured, and a second docking ring 3 matching with the second flange 17 is installed at one end of the connecting pipe 2 close to the ultrasonic flowmeter 4 to be measured. A plurality of second plug posts 28 are equidistantly installed in a circular shape on one side of the second docking ring 3. A plurality of second through holes 31 matching with the second plug posts 28 are equidistantly opened in a circular shape on one side of the second flange 17, so that the plurality of second plug posts 28 are respectively inserted in the plurality of second through holes 31, thereby completing the restriction of the relative position of the second flange 17 and the second docking ring 3. A plurality of second circular holes are equidistantly opened in a circular shape on one side of the second docking ring 3, so that one end of the second plug post 28 is connected and fixed in the second circular hole, thereby improving the stability of the connection between the second plug post 28 and the second docking ring 3.

[0020] See also Figure 1-Figure 5 A first docking ring 5 is provided on the side of the first flange 16 facing away from the ultrasonic flowmeter 4 to be measured, and a plurality of first plug posts 29 are installed in a circular shape and equidistantly on one side of the first docking ring 5. A plurality of first through holes 32 cooperating with the first plug posts 29 are opened in a circular shape and equidistantly on one side of the first flange 16, so that the plurality of first plug posts 29 are respectively inserted in the first through holes 32, thereby completing the restriction of the relative position of the first flange 16 and the first docking ring 5. A plurality of first circular holes are opened in a circular shape and equidistantly on one side of the first docking ring 5, so that one end of the first plug post 29 is connected and fixed in the first circular hole, thereby improving the stability of the connection between the first plug post 29 and the first docking ring 5.

[0021] See also Figure 1-Figure 5 A first straight pipe 15 is installed on the side of the first docking ring 5 away from the first flange 16, a bellows 7 is installed on the end of the first straight pipe 15 away from the first docking ring 5, a second straight pipe 9 is installed on the end of the bellows 7 away from the first straight pipe 15, a third flange 8 is installed on the end of the second straight pipe 9 away from the bellows 7, a first ear plate 6 connected and fixed to the first straight pipe 15 is sleeved on the first straight pipe 15, a second ear plate 14 connected and fixed to the second straight pipe 9 is sleeved on the second straight pipe 9, two cylinders 12 are symmetrically installed on the side of the second ear plate 14 away from the first ear plate 6, the movable end of the cylinder 12 passes through the second ear plate 14 and is connected to the first ear plate 6, and the cylinder 12 is connected to the bellows 7 are arranged in parallel, so that when the ultrasonic flowmeter 4 to be tested is placed between the first straight pipe 15 and the connecting pipe 2, the control cylinder 12 is contracted, so that the cylinder 12 drives the first straight pipe 15 to move toward the second straight pipe 9, so that the length of the bellows 7 is reduced, so that the distance between the first docking ring 5 and the second docking ring 3 is expanded. After the ultrasonic flowmeter 4 to be tested is placed in the specified position, the control cylinder 12 is extended, so that the first plug post 29 and the second plug post 28 are respectively inserted into the first through hole 32 and the second through hole 31, so that the ultrasonic flowmeter 4 to be tested is quickly installed between the connecting pipe 2 and the first straight pipe 15, so that the ultrasonic flowmeter 4 to be tested can be quickly taken in and put out, thereby improving the calibration efficiency.

[0022] See also Figure 1-Figure 5A water collecting box 10 is provided at the lower side of the bellows 7, the water inlet pipe joint 23, the second straight pipe 9, the standard ultrasonic flowmeter 1 and the ultrasonic flowmeter 4 to be tested are all arranged directly above the water collecting box 10, the third flange 8 and the fourth flange 22 are all arranged directly above the water collecting box 10, two supports 11 are symmetrically installed at the bottom of the water collecting box 10, and a drain pipe 13 for connecting the drainage pipe is installed at the lower position of one side of the water collecting box 10. When the second straight pipe 9, the connection part of the water inlet pipe joint 23 with the water supply pipeline, and the two ends of the standard ultrasonic flowmeter 1 leak due to sealing, the leaked water will drip into the water collecting box 10, and then the water collected in the water collecting box 10 is discharged to the collection container through the drainage pipe connected to the drain pipe 13 to prevent the leaked water from dripping and flowing at will.

[0023] See also Figure 1-Figure 4 A bottom plate 24 is provided at the bottom of the water collecting tank 10, and a first support plate 25, a second support plate 26 and a third support plate 27 are installed on the upper surface of the bottom plate 24. The upper end of the first support plate 25 is connected and fixed to the water inlet pipe joint 23, and the upper end of the second support plate 26 is processed with an arc groove, and the first straight pipe 15 is slidably installed in the arc groove. The upper end of the third support plate 27 is connected and fixed to the second straight pipe 9. The bottom plate 24 is installed in the water collecting tank 10, and the first support plate 25 is used to support the water inlet pipe joint 23, and the second support plate 26 and the third support plate 27 are used to support the first straight pipe 15 and the second straight pipe 9 respectively, so as to improve the stability of the structure.

[0024] See also Figure 1-Figure 4 , vertical plates 30 are installed at the four corners of the upper surface of the bottom plate 24, and the upper end of the vertical plate 30 is connected and fixed with a horizontal plate 21, and the end of the horizontal plate 21 away from the bottom plate 24 extends to the outside of the water collecting tank 10, and an upper vertical hole is opened on the side of the upper surface of the horizontal plate 21 away from the vertical plate 30, and a positioning ear 19 is provided on the lower side of the upper vertical hole. The positioning ear 19 is connected and fixed to the water collecting tank 10, and a lower vertical hole aligned with the upper vertical hole is opened on the upper surface of the positioning ear 19. A connecting screw 20 is installed in the channel formed by the upper vertical hole and the lower vertical hole, and the lower end of the connecting screw 20 extends to the lower side of the positioning ear 19 and is threadedly connected with a nut 18. There is a gap between the positioning ear 19 and the horizontal plate 21, so that the horizontal plate 21 The upper vertical hole on the upper plate 21 is aligned with the lower vertical hole on the positioning ear 19, and then the connecting screw 20 is passed through the upper vertical hole and the lower vertical hole and then the nut 18 is screwed on to complete the assembly of the cross plate 21 and the positioning ear 19, that is, the relative position of the bottom plate 24 and the water collecting tank 10 is restricted. At this time, the connecting screw 20 and the nut 18 are both on the outside of the water collecting tank 10, which is convenient for disassembling and assembling the connecting screw 20 and the nut 18 in an area with sufficient space, and preventing the connecting screw 20 and the nut 18 from being in a humid environment in the water collecting tank 10. At the same time, there is a gap between the positioning ear 19 and the cross plate 21, which provides operating space for using truncation to handle the connecting screws 20 and nuts 18 that are difficult to separate.

[0025] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A calibration device for an ultrasonic flowmeter, comprising a standard ultrasonic flowmeter (1), characterized in that: A detachable water inlet pipe joint (23) is installed at one end of the standard ultrasonic flowmeter (1); a detachable connecting pipe (2) is installed at one end of the standard ultrasonic flowmeter (1) away from the water inlet pipe joint (23); an ultrasonic flowmeter (4) to be measured is provided on the side of the connecting pipe (2) away from the standard ultrasonic flowmeter (1); a first flange (16) and a second flange (17) are installed at both ends of the ultrasonic flowmeter (4) to be measured, respectively; a second docking ring (3) matching with the second flange (17) is installed at one end of the connecting pipe (2) close to the ultrasonic flowmeter (4) to be measured; a plurality of second plug posts (28) are installed in an annular manner at equal intervals on one side of the second docking ring (3); and a plurality of second plug posts (28) are installed in an annular manner at equal intervals on one side of the second flange (17). There are a plurality of second through holes (31) matched with the second plug posts (28), and the plurality of second plug posts (28) are respectively inserted in the plurality of second through holes (31). A first docking ring (5) is provided on the side of the first flange (16) facing away from the ultrasonic flow meter (4) to be measured, and a plurality of first plug posts (29) are equidistantly installed in a circular shape on one side of the first docking ring (5). A plurality of first through holes (32) matched with the first plug posts (29) are equidistantly opened in a circular shape on one side of the first flange (16), and the plurality of first plug posts (29) are respectively inserted in the first through holes (32). A water-passing member for adjusting the distance between the first docking ring (5) and the first flange (16) is installed on the side of the first docking ring (5) facing away from the first flange (16).

2. The ultrasonic flowmeter calibration device according to claim 1, characterized in that: The water-passing member comprises a first straight pipe (15), the first straight pipe (15) being mounted on a side of the first docking ring (5) facing away from the first flange (16), a bellows (7) being mounted on an end of the first straight pipe (15) facing away from the first docking ring (5), a second straight pipe (9) being mounted on an end of the bellows (7) facing away from the first straight pipe (15), a first ear plate (6) being sleeved on the first straight pipe (15) and being connected and fixed to the first straight pipe (15), a second ear plate (14) being sleeved on the second straight pipe (9) and being connected and fixed to the second straight pipe (9), two cylinders (12) being symmetrically mounted on a side of the second ear plate (14) facing away from the first ear plate (6), a movable end of the cylinder (12) passing through the second ear plate (14) and being connected to the first ear plate (6), the cylinder (12) being arranged in parallel with the bellows (7), and a water collecting member being mounted on the lower side of the bellows (7).

3. The calibration device for an ultrasonic flowmeter according to claim 2, characterized in that: The water collecting component comprises a water collecting box (10), the water collecting box (10) is arranged at the lower side of the corrugated pipe (7), the water inlet pipe joint (23), the second straight pipe (9), the standard ultrasonic flow meter (1) and the ultrasonic flow meter to be tested (4) are all arranged directly above the water collecting box (10), two supports (11) are symmetrically installed at the bottom of the water collecting box (10), and a drainage pipe (13) for connecting to a drainage pipe is installed at the lower position of one side of the water collecting box (10).

4. The calibration device for an ultrasonic flowmeter according to claim 3, characterized in that: The bottom of the water collecting tank (10) is provided with a bottom plate (24), and a first support plate (25), a second support plate (26) and a third support plate (27) are installed on the upper surface of the bottom plate (24); the upper end of the first support plate (25) is connected and fixed to the water inlet pipe joint (23); the upper end of the second support plate (26) is processed with an arc groove, and the first straight pipe (15) is slidably installed in the arc groove; the upper end of the third support plate (27) is connected and fixed to the second straight pipe (9); and the bottom plate (24) is connected to the water collecting tank (10) via a connecting piece.

5. The calibration device for an ultrasonic flowmeter according to claim 4, characterized in that: The connecting member comprises a vertical plate (30), and the vertical plates (30) are installed at four corners of the upper surface of the bottom plate (24). The upper end of the vertical plate (30) is connected and fixed with a horizontal plate (21). The end of the horizontal plate (21) away from the bottom plate (24) extends to the outside of the water collecting tank (10). An upper vertical hole is provided on the side of the upper surface of the horizontal plate (21) away from the vertical plate (30). A positioning ear (19) is provided on the lower side of the upper vertical hole. The positioning ear (19) is connected and fixed to the water collecting tank (10). A lower vertical hole is provided on the upper surface of the positioning ear (19) and is aligned with the upper vertical hole. A connecting screw (20) is installed in a channel formed by the upper vertical hole and the lower vertical hole. The lower end of the connecting screw (20) extends to the lower side of the positioning ear (19) and is threadedly connected with a nut (18). A gap exists between the positioning ear (19) and the horizontal plate (21).

6. The calibration device for an ultrasonic flowmeter according to claim 4, characterized in that: A fourth flange (22) is installed at one end of the water inlet pipe joint (23) away from the standard ultrasonic flow meter (1), and a third flange (8) is installed at one end of the second straight pipe (9) away from the bellows (7). The third flange (8) and the fourth flange (22) are both arranged directly above the water collecting tank (10).

7. The calibration device for an ultrasonic flowmeter according to claim 1, characterized in that: One side of the first docking ring (5) is provided with a plurality of first circular holes at equal intervals in the shape of a ring, one end of the first plug post (29) is connected and fixed in the first circular hole, and one side of the second docking ring (3) is provided with a plurality of second circular holes at equal intervals in the shape of a ring, one end of the second plug post (28) is connected and fixed in the second circular hole.

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