Ultrasonic flowmeter

Abstract

The invention discloses an ultrasonic flow meter, and relates to the technical field of fluid measurement, the ultrasonic flow meter comprises an external clamping type flow meter and a fitting mechanism, the fitting mechanism is arranged on the lower surface of the external clamping type flow meter, and the fitting mechanism comprises a silicone rubber bag fixedly connected with the lower surface of the external clamping type flow meter; a storage bag is fixedly connected to the front end of the outer clamping type flowmeter, the storage bag is communicated with the silicone rubber bag through a conveying pipe, the storage bag and the silicone rubber bag are both filled with a coupling agent, a first support is fixedly connected to the front end of the outer clamping type flowmeter, and a threaded rod is inserted into the middle of the first support in a threaded mode; the end, close to the storage bag, of the screw rod is rotationally connected with a pressurizing plate, the short arm ends of the first support are inserted into the two sides of the pressurizing plate correspondingly, and therefore the problem that the measuring precision is affected due to the fact that sound wave transmission of the ultrasonic flowmeter in the running state is unstable due to the change of the density of the contact face is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid measurement, and more specifically, to an ultrasonic flowmeter. Background Art

[0002] An ultrasonic flowmeter is a flow measurement device, and an external clamp ultrasonic flowmeter is a non-invasive flow measurement device. By clamping the sensor outside the pipeline, it uses the frequency difference of ultrasonic waves propagating downstream and upstream in the fluid to calculate the flow rate in real time. There is no need to cut or transform the pipeline, and it is applicable to various media such as liquids and gases.

[0003] Since the surface of the pipeline is arc-shaped, in order to fit the pipeline surface more closely, the contact surface between the ultrasonic flowmeter and the pipeline is made of silicone rubber. And in order to clamp the ultrasonic flowmeter outside the pipeline, a strap is used to apply a clamping force to the flowmeter during the installation process to ensure that it fits tightly on the pipeline surface. However, during this process, the silicone rubber pad on the contact interface between the ultrasonic flowmeter and the pipeline will be affected by the applied pressure, and the pressure received each time is different, resulting in an increase in the density of the compressed area and a high uncertainty in the density increase situation. The change in the contact surface density will cause instability in the acoustic wave transmission of the ultrasonic flowmeter during operation, thereby affecting the measurement accuracy. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide an ultrasonic flowmeter to solve the problem that the change in the contact surface density will cause instability in the acoustic wave transmission of the ultrasonic flowmeter during operation, thereby affecting the measurement accuracy.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] An ultrasonic flowmeter includes an external clamp flowmeter and a fitting mechanism. The fitting mechanism is arranged on the lower surface of the external clamp flowmeter. The fitting mechanism includes a silicone rubber bladder fixedly connected to the lower surface of the external clamp flowmeter. A reserve bladder is fixedly connected to the front end of the external clamp flowmeter. The reserve bladder and the silicone rubber bladder are connected and communicated through a delivery pipe. The interiors of the reserve bladder and the silicone rubber bladder are both filled with coupling agent. A first bracket is fixedly connected to the front end of the external clamp flowmeter. A screw rod is threadedly inserted in the middle of the first bracket. One end of the screw rod close to the reserve bladder is rotatably connected to a pressure plate. The short arm ends of the first bracket are respectively inserted into both sides of the pressure plate. A knob is fixedly connected to the end of the screw rod away from the pressure plate.

[0007] Furthermore, waterproof tapes are fixedly connected to the four peripheries of the lower surface of the silicone rubber bladder.

[0008] Further, a water blocking mechanism is provided on the side of the external clamp type flowmeter. The water blocking mechanism includes a moving track fixedly connected to the outer surface of the external clamp type flowmeter. A moving column is arranged inside the moving track. The bottom end of the moving column is fixedly connected with a chassis. Both the chassis and the moving column are slidably connected to the inside of the moving track. A moving block is fixedly sleeved on the surface of the moving column. A connecting rod is fixedly connected to the surface of the moving block. One end of the connecting rod away from the moving block is fixedly connected with a water blocking plate.

[0009] Further, a rubber sheet is fixedly connected to the lower surface of the water blocking plate.

[0010] Further, circular holes and square holes are formed on the surface of the moving block. The circular holes and the square holes are communicated. A positioning pin is inserted into the circular hole. The positioning pin is adapted to the square hole. Three jacks are formed on the surface of the moving track. The three jacks are respectively located in the middle of three sections of the moving track. Each bending part of the moving track is a fillet.

[0011] Further, a rotating ring is rotatably connected to the top end of the positioning pin. A second bracket is fixedly connected to the top end of the moving block. A first spring is fixedly connected between the second bracket and the rotating ring.

[0012] Further, a pull rod is fixedly connected to the top end of the positioning pin. The pull rod is inserted into the middle part of the second bracket.

[0013] Further, a position adjusting mechanism is provided on the top of the external clamp type flowmeter. The position adjusting mechanism includes a rotating rod rotatably inserted into the top end inside the external clamp type flowmeter. A rotating column is fixedly connected to one end of the rotating rod inside the external clamp type flowmeter. A plurality of reverse claw strips are fixedly connected to the outer arc surface of the rotating column.

[0014] Further, side plates are fixedly connected to both ends of the rotating column.

[0015] Further, a rotating handle is fixedly connected to one end of the rotating rod away from the rotating column. Two third brackets are fixedly connected to the outer surface of the external clamp type flowmeter. An annular frame is fixedly connected between the two third brackets. A plurality of sliding grooves are formed on the surface of the annular frame. A slider is slidably connected to the inside of the sliding groove. A rotating shaft is rotatably connected to the inside of the slider. A rotation limiting shaft is fixedly connected to the rear end of the rotating shaft. A plurality of grooves matched with the rotation limiting shaft are formed on an arc surface of one section of the rotating rod away from the rotating column. A second spring is arranged inside the sliding groove. Two ends of the second spring are respectively fixedly connected with the slider and the sliding groove.

[0016] Compared with the prior art, the beneficial effects of the present invention are: (1) By squeezing the coupling agent into the interior of the silicone rubber bladder, this solution enables the silicone rubber bladder to conform to the outer wall of the pipeline, ensuring that during the operation of the external clamp-on flowmeter, sound waves can be transmitted to the pipeline via the coupling agent and the silicone rubber bladder. This effectively avoids the unstable sound wave transmission phenomenon that occurs in ultrasonic flowmeters due to uneven density of the transmission medium during operation, improving the accuracy of flow measurement.

[0017] (2) Before installing the external clamp-on flowmeter, using waterproof tape to firmly fix the silicone rubber bladder and the external clamp-on flowmeter on the pipeline surface in advance can ensure the stability of the installation process. Moreover, due to the sealing performance of the waterproof tape, the risk of external moisture seeping into the contact interface is effectively reduced, significantly reducing the possibility of a decline in measurement accuracy caused by corrosion of the contact surface, further improving the accuracy of flow measurement.

[0018] (3) After installing the external clamp-on flowmeter, a water baffle can be used to guide the liquid to flow around both sides of the external clamp-on flowmeter, effectively preventing the liquid from directly flowing under the external clamp-on flowmeter, reducing the long-term immersion of the liquid in the installation part of the flowmeter, thereby preventing the liquid from penetrating into the contact interface and causing corrosion of the contact surface, ensuring the accuracy of flow measurement.

[0019] (4) By rotating the rotating column, this solution can perform fine and precise displacement adjustment on the external clamp-on flowmeter to optimize the installation position of the flowmeter. At the same time, the designed V-shaped reverse claw bar structure can provide enhanced gripping force and stability when the rotating column rotates in any direction, effectively reducing the possible sliding phenomenon during the rotation process, ensuring the smoothness and accuracy of the adjustment operation. It not only provides a more convenient and efficient adjustment method but also significantly improves the installation accuracy and operation convenience of the external clamp-on flowmeter. Brief Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structural diagram of the front end of the external clamp-on flowmeter of the present invention; Figure 3 is a schematic structural diagram of the reserve bladder and the pressure plate part of the present invention; Figure 4 is a schematic structural diagram of the reserve bladder and the silicone rubber bladder of the present invention; Figure 5 is a schematic structural diagram of the waterproof tape of the present invention; Figure 6 is a schematic structural diagram of the interior of the moving block of the present invention; Figure 7 is a schematic structural diagram of the rotating rod part of the present invention; Figure 8 is of the present invention Figure 7 Enlarged view at A in Figure 9 This is a schematic structural diagram of the reverse claw bar part of the present invention; Figure 10 This is a schematic structural diagram of the rotating rod and the rotation limiting shaft of the present invention.

[0021] Description of the reference numerals in the figure: 1. External clamping flowmeter; 201. Silicone rubber bladder; 202. Reserve bladder; 203. Pressing plate; 204. First bracket; 205. Delivery pipe; 206. Knob; 207. Screw; 208. Waterproof tape; 301. Moving track; 302. Water baffle; 303. Rubber sheet; 304. Connecting rod; 305. Moving block; 306. Moving column; 307. Chassis; 308. Second bracket; 309. Pull rod; 310. First spring; 311. Positioning pin; 312. Square hole; 313. Circular hole; 314. Rotating ring; 401. Reverse claw bar; 402. Rotating rod; 403. Rotating handle; 404. Side plate; 405. Third bracket; 406. Rotation limiting shaft; 407. Second spring; 408. Rotation shaft; 409. Slide block; 410. Ring-shaped frame; 411. Rotating column. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figures 1 - 5, An ultrasonic flowmeter, including an external clamp-on flowmeter 1 and a fitting mechanism. The fitting mechanism is arranged on the lower surface of the external clamp-on flowmeter 1. The fitting mechanism includes a silicone rubber bladder 201 fixedly connected to the lower surface of the external clamp-on flowmeter 1. A reserve bladder 202 is fixedly connected to the front end of the external clamp-on flowmeter 1. The reserve bladder 202 is communicated with the silicone rubber bladder 201 through a delivery pipe 205. The interiors of both the reserve bladder 202 and the silicone rubber bladder 201 are filled with coupling agent. Squeezing the coupling agent into the silicone rubber bladder 201 can make the silicone rubber bladder 201 fit onto the surface of the pipeline, and during the operation of the external clamp-on flowmeter 1, it will not cause instability in the acoustic wave transmission of the ultrasonic flowmeter in the operating state, thereby improving the measurement accuracy. A first bracket 204 is fixedly connected to the front end of the external clamp-on flowmeter 1. A screw rod 207 is threadedly inserted in the middle of the first bracket 204. One end of the screw rod 207 close to the reserve bladder 202 is rotatably connected to a pressure plate 203. The pressure plate 203 can be used to apply pressure to the reserve bladder 202 to squeeze the coupling agent in the reserve bladder 202 into the silicone rubber bladder 201. The short arm ends of the first bracket 204 are respectively inserted on both sides of the pressure plate 203. One end of the screw rod 207 away from the pressure plate 203 is fixedly connected to a knob 206.

[0024] Wherein, waterproof tapes 208 are fixedly connected to the periphery of the lower surface of the silicone rubber bladder 201. Through the waterproof tapes 208, the silicone rubber bladder 201 and its external clamp-on flowmeter 1 can be pre-fixed on the pipeline, and through the waterproof tapes 208, the probability of external water entering the contact surface can be reduced.

[0025] When installing the external clamp-on flowmeter 1 by adopting the above technical solution, first use tools to clean the rust on the surface of the pipeline at the installation position of the external clamp-on flowmeter 1. Then attach the external clamp-on flowmeter 1 to the installation position and tie the external clamp-on flowmeter 1 to the pipeline with a strap. Then rotate the knob 206 to drive the screw rod 207 to rotate, and further push the pressure plate 203 to move towards the direction close to the external clamp-on flowmeter 1. Thus, the pressure plate 203 can be used to apply pressure to the reserve bladder 202, and the coupling agent in the reserve bladder 202 can be squeezed into the silicone rubber bladder 201, making the silicone rubber bladder 201 completely fit onto the surface of the pipeline. During the operation of the external clamp-on flowmeter 1, acoustic waves can stably pass through the coupling agent and the silicone rubber bladder 201 and be transmitted to the pipeline, and it will not cause instability in the acoustic wave transmission of the ultrasonic flowmeter in the operating state, thereby improving the measurement accuracy. Before installing the external clamp-on flowmeter 1, the silicone rubber bladder 201 and its external clamp-on flowmeter 1 can be pre-fixed on the pipeline through the waterproof tapes 208, and through the waterproof tapes 208, the probability of external water entering the contact surface can be reduced, so as to reduce the probability of rust on the contact surface affecting the measurement accuracy.

[0026] Such as Figure 2 AndFigure 6 As shown, a water retaining mechanism is arranged on the side of the external clamp-on flow meter 1, and the water retaining mechanism includes a movable track 301 fixedly connected to the outer surface of the external clamp-on flow meter 1, so that the water retaining plate 302 moves along the track of the movable track 301, and the direction of the water retaining plate 302 relative to the external clamp-on flow meter 1 can be adjusted. A movable column 306 is arranged inside the movable track 301, and a bottom end of the movable column 306 is fixedly connected to a chassis 307, and the chassis 307 and the movable column 306 are both slidably connected to the inside of the movable track 301, and the movable column 30 6 is fixedly sleeved with a moving block 305, the surface of the moving block 305 is fixedly connected with a connecting rod 304, and the end of the connecting rod 304 away from the moving block 305 is fixedly connected with a water baffle 302, the water baffle 302 can make the liquid flow toward the two sides of the external clamp-on flow meter 1 to prevent the liquid from flowing from top to bottom to the contact surface, and the lower surface of the water baffle 302 is fixedly connected with a rubber sheet 303, the rubber sheet 303 can better fit the surface of the pipe, so as to prevent water from flowing downward over the water baffle 302 and affecting the use effect of the water baffle 302.

[0027] Among them, a circular hole 313 and a square hole 312 are provided on the surface of the moving block 305, and the circular hole 313 and the square hole 312 are connected. Through the cooperation of the circular hole 313 and the square hole 312, the positioning pin 311 can pass through the square hole 312 while aligning with the square hole 312 without affecting the rotation of the positioning pin 311. A positioning pin 311 is inserted into the circular hole 313, and the positioning pin 311 is adapted to the square hole 312. Three sockets are provided on the surface of the moving track 301, and the positioning pin 311 passes through the square hole 312 and enters the corresponding sockets, so as to fix the position of the water baffle 302. The three sockets are respectively located in the middle of the three sections of the moving track 301. Each bend of the moving track 301 is rounded, so that the water baffle 302 can move along the path of the moving track 301 without affecting the turning.

[0028] Among them, the top end of the positioning pin 311 is rotatably connected to a rotating ring 314, the top end of the moving block 305 is fixedly connected to a second bracket 308, and a first spring 310 is fixedly connected between the second bracket 308 and the rotating ring 314. When the positioning pin 311 is aligned with the square hole 312, the first spring 310 in a compressed state can be used to push the pin through the square hole 312 and into the corresponding socket. The top end of the positioning pin 311 is fixedly connected to a pull rod 309, and the pull rod 309 is inserted into the middle of the second bracket 308.

[0029] By adopting the above technical solution, when the external clamp flowmeter 1 is installed on the pipeline, since the pipeline is used to transport liquid, the environment where it is located may cause flowing liquid to appear on the outer surface of the pipeline. When these liquids flow to the lower part of the external clamp flowmeter 1, with the long-term immersion of the liquid, the liquid will penetrate into the contact surface and cause corrosion of the contact surface. Therefore, after the external clamp flowmeter 1 is installed, the water baffle 302 can make the liquid flow to both sides of the external clamp flowmeter 1, preventing the liquid from flowing down to the contact surface from top to bottom.

[0030] As the installation attitude of the external clamp flowmeter 1 is different, the water baffle 302 can be moved along the track of the moving track 301, so as to adjust the direction of the water baffle 302 relative to the external clamp flowmeter 1, and make the water baffle 302 always be above the external clamp flowmeter 1 to provide better applicability. After the position of the water baffle 302 is adjusted, rotate the pull rod 309 to align the positioning pin 311 with the square hole 312, and then the compressed first spring 310 can be used to push the positioning pin 311 through the square hole 312 into the corresponding jack, so as to fix the position of the water baffle 302 and prevent the water baffle 302 from swinging, thereby achieving a better water blocking effect.

[0031] As Figures 7 - 10 shown, a position adjustment mechanism is provided at the top of the external clamp flowmeter 1. The position adjustment mechanism includes a rotating rod 402 rotatably inserted into the top end inside the external clamp flowmeter 1. One end of the rotating rod 402 located inside the external clamp flowmeter 1 is fixedly connected with a rotating column 411. By the rotating column 411, the strap can be toggled, so that the external clamp flowmeter 1 moves slowly with the strap as a reference to adjust the position of the flowmeter. A plurality of reverse claw strips 401 are fixedly connected to the outer arc surface of the rotating column 411. The V-shaped reverse claw strips 401 can provide a better gripping effect when the rotating column 411 rotates in any direction. Side plates 404 are fixedly connected to both ends of the rotating column 411. A rotating handle 403 is fixedly connected to the end of the rotating rod 402 away from the rotating column 411. By rotating the rotating handle 403, the rotating rod 402 can be rotated, and then the rotating column 411 can be driven to rotate.

[0032] Among them, two third brackets 405 are fixedly connected to the outer surface of the external clamp-on flowmeter 1, and an annular frame 410 is fixedly connected between the two third brackets 405. A plurality of slide grooves are provided on the surface of the annular frame 410, and a slider 409 is slidably connected inside the slide groove, and a rotating shaft 408 is rotatably connected inside the slider 409. A rotation limiting shaft 406 is fixedly connected to the rear end of the rotating shaft 408. A plurality of grooves matching the rotation limiting shaft 406 are provided on a circular arc surface of the rotating rod 402 away from the rotating column 411. Through the cooperation between the groove and the rotation limiting shaft 406, the rotation of the rotating column 411 can be limited without manual rotation, so as to prevent the external clamp-on flowmeter 1 from sliding. A second spring 407 is provided inside the slide groove, and the thrust provided by the second spring 407 can make the rotation limiting shaft 406 better embedded in the groove, so that the rotation of the rotating column 411 can be rotated without affecting the manual operation, and the rotation limiting shaft 406 will not be separated from the groove in a static state. The two ends of the second spring 407 are respectively fixedly connected to the slider 409 and the slide groove.

[0033] By adopting the above technical solution, after the external clamp-on flow meter 1 is tied to the pipeline by the binding strap, if the fixed position needs to be adjusted, the binding strap needs to be removed and adjusted, which causes inconvenience in adjustment. Therefore, the rotating rod 402 is rotated by rotating the handle 403, thereby driving the rotating column 411 to rotate. When the binding strap is used to bind the external clamp-on flow meter 1, the main pressure supported by the rotating column 411 is borne by the rotating column 411. Therefore, the binding strap can be moved by the rotating column 411, so that the external clamp-on flow meter 1 is slowly moved with the binding strap as a reference, so as to adjust the position of the flow meter. In addition, the V-shaped reverse claw strip 401 can provide a better gripping effect when the rotating column 411 is rotated in any direction, thereby reducing the phenomenon that the rotating column 411 slides and cannot be adjusted when it rotates.

[0034] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An ultrasonic flow meter, comprising a clamp-on flow meter (1), characterized in that: A fitting mechanism, the fitting mechanism being arranged on the lower surface of the clamp-on flow meter (1), the fitting mechanism comprising a silicone rubber capsule (201) fixedly connected to the lower surface of the clamp-on flow meter (1), a reserve capsule (202) being fixedly connected to the front end of the clamp-on flow meter (1), the reserve capsule (202) and the silicone rubber capsule (201) being connected via a delivery tube (205), the interiors of the reserve capsule (202) and the silicone rubber capsule (201) being filled with a coupling agent, The front end of the external clamp-on flow meter (1) is fixedly connected to a first bracket (204), a screw rod (207) is threadedly inserted in the middle of the first bracket (204), one end of the screw rod (207) close to the reserve bag (202) is rotatably connected to a pressure plate (203), the short arm ends of the first bracket (204) are respectively inserted into two sides of the pressure plate (203), and one end of the screw rod (207) away from the pressure plate (203) is fixedly connected to a knob (206).

2. An ultrasonic flow meter according to claim 1, characterized in that: The lower surface of the silicone rubber bag (201) is fixedly connected with waterproof tape (208) around its periphery.

3. An ultrasonic flow meter according to claim 1, characterized in that: A water retaining mechanism is provided on the side of an external clamp-on flow meter (1), the water retaining mechanism comprising a movable track (301) fixedly connected to the outer surface of the external clamp-on flow meter (1), a movable column (306) being provided inside the movable track (301), a bottom end of the movable column (306) being fixedly connected to a chassis (307), the chassis (307) and the movable column (306) being both slidably connected to the inside of the movable track (301), a movable block (305) being fixedly sleeved on the surface of the movable column (306), a connecting rod (304) being fixedly connected to the surface of the movable block (305), and a water retaining plate (302) being fixedly connected to one end of the connecting rod (304) away from the movable block (305).

4. An ultrasonic flow meter according to claim 3, characterized in that: A rubber sheet (303) is fixedly connected to the lower surface of the water baffle (302).

5. The ultrasonic flow meter according to claim 3, characterized in that: A circular hole (313) and a square hole (312) are provided on the surface of the moving block (305), the circular hole (313) and the square hole (312) are connected, a positioning pin (311) is inserted into the circular hole (313), the positioning pin (311) is matched with the square hole (312), three plug holes are provided on the surface of the moving track (301), the three plug holes are respectively located in the middle of three sections of the moving track (301), and each bend of the moving track (301) is rounded.

6. An ultrasonic flow meter according to claim 5, characterized in that: The top end of the positioning pin (311) is rotatably connected to a rotating ring (314), the top end of the moving block (305) is fixedly connected to a second bracket (308), and a first spring (310) is fixedly connected between the second bracket (308) and the rotating ring (314).

7. An ultrasonic flow meter according to claim 5, characterized in that: The top end of the positioning pin (311) is fixedly connected to a pull rod (309), and the pull rod (309) is inserted into the middle part of the second bracket (308).

8. An ultrasonic flow meter according to claim 1, characterized in that: A position adjustment mechanism is provided at the top of an external clamp-on flow meter (1), the position adjustment mechanism comprising a rotating rod (402) rotatably inserted into the top of the external clamp-on flow meter (1), one end of the rotating rod (402) located inside the external clamp-on flow meter (1) is fixedly connected to a rotating column (411), and an outer arc surface of the rotating column (411) is fixedly connected to a plurality of reverse claw strips (401).

9. An ultrasonic flow meter according to claim 8, characterized in that: Both ends of the rotating column (411) are fixedly connected to side plates (404).

10. An ultrasonic flow meter according to claim 8, characterized in that: One end of the rotating rod (402) away from the rotating column (411) is fixedly connected to a rotating handle (403); two third brackets (405) are fixedly connected to the outer surface of the external clamp-on flow meter (1); an annular frame (410) is fixedly connected between the two third brackets (405); a plurality of slide grooves are provided on the surface of the annular frame (410); a slider (409) is slidably connected inside the slide groove; a rotating shaft (408) is rotatably connected inside the slider (409); a rotation limiting shaft (406) is fixedly connected to the rear end of the rotating shaft (408); a plurality of grooves matching the rotation limiting shaft (406) are provided on a section of the circular arc surface of the rotating rod (402) away from the rotating column (411); a second spring (407) is provided inside the slide groove; and two ends of the second spring (407) are respectively fixedly connected to the slider (409) and the slide groove.

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