Ultrasonic flowmeter

Abstract

The utility model discloses an ultrasonic flowmeter which comprises a measuring pipeline, a display instrument is arranged on the upper portion of the outer wall of the measuring pipeline, two installation openings are formed in the measuring pipeline, installation pipes are arranged at the two installation openings respectively, and ultrasonic transceivers are arranged in the installation pipes. The axes of the two ultrasonic transceivers form inclined included angles relative to the cross section of the measuring pipeline; a stepped hole is formed in the mounting pipe, a mounting part is fixedly connected to one side of the ultrasonic transceiver, two sealing rings are arranged between the outer wall of the mounting part and the inner side wall of the stepped hole, a pressing block is arranged on the side, away from the ultrasonic transceiver, of the mounting part, and a first spring is arranged below the pressing block; a clamping assembly is arranged on the side, away from the ultrasonic transceiver, of the pressing block. The two ends of the measuring pipeline are connected with a liquid inlet pipe and a liquid outlet pipe respectively, and a filtering assembly is arranged on the side, close to the measuring pipeline, in the liquid inlet pipe. According to the utility model, the ultrasonic transceiver can be conveniently disassembled, assembled and replaced, and meanwhile, a filtering effect is achieved.

Description

Technical Field

[0001] This utility model relates to the field of flow meter technology, and in particular to an ultrasonic flow meter. Background Art

[0002] An ultrasonic flow meter is a flow meter developed based on the principle that the propagation speed of ultrasound in a flowing medium is equal to the vector sum of the average flow velocity of the measured medium and the velocity of the sound wave in a stationary medium. It mainly consists of a transducer and a converter. Based on the principle of signal detection, ultrasonic flow meters can be classified into time-difference method, beam deflection method, Doppler method, cross-correlation method, spatial filtering method, and noise method, among others. Among these, the time-difference ultrasonic flow meter is widely used in practice. In this method, a pair of ultrasonic transceivers are positioned upstream and downstream of the pipe through which the fluid flows. Ultrasonic pulse signals are transmitted from the outside of the pipe, penetrating the pipe wall, into the fluid flow. The flow velocity is calculated by the difference between the time it takes for the ultrasonic pulse signal to travel from upstream to downstream and from downstream to upstream. This velocity is then multiplied by the cross-sectional area of ​​the pipe to measure the flow rate within the pipe.

[0003] While time-difference ultrasonic flow meters are constantly being developed, a series of problems have emerged during use. For example, with the increase in service life, the core components inside the ultrasonic transceiver will age and experience performance degradation. If maintenance or replacement of the ultrasonic transceiver is required, screw installation requires removing the screws first, which necessitates additional screwdrivers or wrenches, making it inconvenient. Furthermore, various liquids often carry impurities into the measuring pipe, causing long-term blockage and covering the ultrasonic components. This affects the transmission of ultrasonic waves, resulting in more significant signal attenuation and impacting the accuracy of the equipment's detection. Summary of the Invention

[0004] To address the problems mentioned in the background art, this utility model proposes an ultrasonic flow meter that facilitates the disassembly and replacement of the ultrasonic transceiver while also providing a filtration effect.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] An ultrasonic flow meter includes a cylindrical measuring pipe open at both ends. A display instrument is installed on the upper part of the outer wall of the measuring pipe. Two installation ports are opened on the measuring pipe, and installation tubes are respectively installed at the two installation ports. An ultrasonic transceiver is installed inside the installation tube. The axes of the two ultrasonic transceivers are inclined at an angle relative to the cross section of the measuring pipe. A stepped hole is opened in the installation tube. A mounting part is fixedly connected to one side of the ultrasonic transceiver. Two sealing rings are provided between the outer wall of the mounting part and the inner wall of the stepped hole. A pressure block is provided on the side of the mounting part away from the ultrasonic transceiver. A spring is provided below the pressure block. A snap-fit ​​assembly is provided on the side of the pressure block away from the ultrasonic transceiver.

[0007] The measuring pipe is connected to an inlet pipe and an outlet pipe at both ends. A filter assembly is installed inside the inlet pipe on the side closest to the measuring pipe. The filter assembly includes a fixing ring and a filter screen installed on the inner ring surface of the fixing ring.

[0008] Preferably, a flange one is connected to the left end of the measuring pipe, and a flange two is connected to the right end of the measuring pipe. A temperature sensor is provided on the upper surface of the flange one, and a pressure sensor is provided on the upper surface of the flange two. One end of both the temperature sensor and the pressure sensor penetrates and extends into the interior of the measuring pipe.

[0009] Preferably, the inlet pipe and outlet pipe are each provided with a flange three at the end connected to the measuring pipe. At least two limiting grooves are provided in a ring array on the inner wall of the flange three. A limiting block is provided on the outer ring surface of the fixing ring. The limiting block and the limiting groove are provided in a one-to-one correspondence.

[0010] Preferably, the upper layer of the stepped hole is a square hole and the lower layer is a circular hole, and the diameter of the circular hole is less than the diagonal length of the square hole. The spring is located inside the square hole of the stepped hole, and the sealing ring is located inside the circular hole of the stepped hole.

[0011] Preferably, the snap-fit ​​assembly includes fixed seats respectively disposed on both sides of the inner wall of the mounting tube, a pressure rod disposed between the two fixed seats, two pins respectively disposed at both ends of the pressure rod, a slot is provided on the fixed seat, two columns are symmetrically disposed in the slot, a locking plate is disposed on one side of the column, grooves are symmetrically disposed on the inner wall of the slot, a rotating shaft is disposed in the groove, and one end of the locking plate is fitted onto the rotating shaft.

[0012] Preferably, a second spring is also provided in the groove, and the second spring is connected to the end of the card plate away from the rotating shaft; one end of the slot passes through the side wall of the fixing seat to form an opening.

[0013] Preferably, the upper surface of the display instrument is provided with a display screen, and the upper surface of the display screen is provided with a cover plate, which is rotatably connected to one side of the display screen.

[0014] Preferably, a rubber plug is provided at the end of the installation tube away from the measuring pipe.

[0015] The beneficial effects of the utility model are:

[0016] In this invention, by inserting the mounting part into the stepped hole, the pressure rod in the snap-fit ​​assembly compresses the pressure block, thereby compressing the first spring. At this time, the sealing ring is compressed radially along the mounting part, thus forming a sealing surface between the sealing ring and the mounting part, and between the sealing ring and the stepped hole, reducing the possibility of fluid leakage. Specifically, when installing the pressure rod, the pin is inserted from the slot opening, passes through the middle of the two columns, and enters the slot. Then, the pressure rod is rotated, and the pin pushes the snap-fit ​​plate outward, compressing the second spring. Under the elastic force of the second spring, the pin is snapped between the columns and the snap-fit ​​plate. This allows for convenient and quick fixing of the pressure rod without the need for installation tools, making the operation simple and quick, and facilitating later maintenance. Furthermore, by setting up a filter assembly, interference from excessive impurities can be avoided during ultrasonic flow meter measurement. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention.

[0018] Figure 2 This is a cross-sectional view of the measuring pipe in this utility model.

[0019] Figure 3 This is a schematic diagram of the filter component in this utility model.

[0020] Figure 4 This is a cross-sectional view of the mounting tube in this utility model.

[0021] Figure 5 This is a schematic diagram of the snap-fit ​​component in this utility model.

[0022] Figure 6 This is a cross-sectional view of the fixing base in this utility model.

[0023] Figure 7 This is a schematic diagram of the installation of the temperature sensor on the flange in this utility model. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0025] like Figures 1 to 7As shown, an ultrasonic flow meter includes a cylindrical measuring pipe 1 open at both ends. A display instrument 2 is installed on the upper part of the outer wall of the measuring pipe 1. Two mounting ports are opened on the measuring pipe 1, and mounting pipes 3 are respectively installed at the two mounting ports. An ultrasonic transceiver 4 is installed inside the mounting pipe 3. The axes of the two ultrasonic transceivers 4 are inclined at an angle relative to the cross-section of the measuring pipe 1. A stepped hole 5 is opened inside the mounting pipe 3. A mounting part 6 is fixedly connected to one side of the ultrasonic transceiver 4. The outer wall of the mounting part 6 is flush with the stepped hole. Two sealing rings 7 are provided between the inner sidewalls of 5 to reduce the possibility of fluid leakage; a pressure block 8 is provided on the side of the mounting part 6 away from the ultrasonic transceiver 4, and a spring 9 is provided below the pressure block 8. A snap-fit ​​assembly is provided on the side of the pressure block 8 away from the ultrasonic transceiver 4; wherein, the two ends of the measuring pipe 1 are respectively connected to the inlet pipe 10 and the outlet pipe 11, and a filter assembly is provided inside the inlet pipe 10 near the side of the measuring pipe 1. The filter assembly includes a fixing ring 12 and a filter screen 13 provided on the inner ring surface of the fixing ring 12.

[0026] In this invention, when fluid flows in the measuring pipe 1, ultrasonic pulse signals are alternately transmitted from ultrasonic transceivers 4. The fluid, traversing the measuring pipe 1, is reflected in a V-shape on the opposite side of the pipe wall and received by another ultrasonic transceiver 4. The transmission time difference Δt of the ultrasonic pulse signals is then measured when the flow is forward and backward. Since this time difference Δt is equivalent to the fluid velocity V, the flow rate is obtained by multiplying the time difference Δt by the cross-sectional area S of the measuring pipe 1: Q = S·Δt. Furthermore, by inserting the mounting part 6 into the stepped hole 5, the pressure block 8 is compressed by the pressure rod 22 in the snap-fit ​​assembly, thereby compressing the spring 9. At this time, the sealing ring 7 is compressed radially along the mounting part 6, thus forming a sealing surface between the sealing ring 7 and the mounting part 6, and between the sealing ring 7 and the stepped hole 5, reducing the possibility of fluid leakage. Additionally, by providing a filter assembly, interference from excessive impurities during ultrasonic flow meter measurement can be avoided.

[0027] Furthermore, a flange 14 is connected to the left end of the measuring pipe 1, and a flange 2 15 is connected to the right end of the measuring pipe 1. A temperature sensor 16 is provided on the upper surface of the flange 14, and a pressure sensor 17 is provided on the upper surface of the flange 2 15. One end of both the temperature sensor 16 and the pressure sensor 17 penetrates and extends into the interior of the measuring pipe 1.

[0028] By installing temperature sensor 16 and pressure sensor 17 on flange 14 and flange 2 respectively, the temperature and pressure of the fluid inside the measuring pipe 1 can be detected, providing a variety of practical performance.

[0029] In this embodiment, both the inlet pipe 10 and the outlet pipe 11 are equipped with flanges 18 at their ends connected to the measuring pipe 1. At least two limiting grooves 19 are arranged in a circular array on the inner wall of the flanges 18. Limiting blocks 20 are provided on the outer ring surface of the fixing ring 12, with each limiting block 20 corresponding to one of the limiting grooves 19. The interlocking of the limiting blocks 20 and the limiting grooves 19 facilitates the installation and removal of the fixing ring 12. Furthermore, when the flanges 14 and 18 are fixed, the limiting blocks 20 remain fixed, thus maintaining the stability of the filter assembly.

[0030] Please refer to this again. Figure 4 The upper layer of the stepped hole 5 is a square hole, and the lower layer is a circular hole. The diameter of the circular hole is less than the diagonal length of the square hole. The spring 9 is located inside the square hole of the stepped hole 5, and the sealing ring 7 is located inside the circular hole of the stepped hole 5.

[0031] Please refer to this again. Figure 5 and Figure 6 The snap-fit ​​assembly includes two fixing seats 21 respectively disposed on both sides of the inner wall of the mounting tube 3. A pressure rod 22 is disposed between the two fixing seats 21. Two pins 23 are respectively disposed at both ends of the pressure rod 22. A slot 24 is provided on the fixing seat 21. Two columns 25 are symmetrically disposed in the slot 24. A locking plate 26 is disposed on one side of the column 25. A groove 27 is symmetrically disposed on the inner wall of the slot 24. A rotating shaft 28 is disposed in the groove 27. One end of the locking plate 26 is fitted onto the rotating shaft 28.

[0032] Furthermore, a second spring 29 is also provided in the groove 27, and the second spring 29 is connected to the end of the card plate 26 away from the rotating shaft 28; one end of the slot 24 passes through the side wall of the fixing seat 21 to form an opening.

[0033] By setting up a snap-fit ​​assembly, when installing the pressure rod 22, the pin 23 is inserted from the opening of the slot 24, passes through the middle of the two columns 25, and enters the slot 24. Then, the pressure rod 22 is rotated, and the pin 23 pushes the clamping plate 26 outward. The second spring 29 is compressed. Under the elastic force of the second spring 29, the pin 23 is snapped between the column 25 and the clamping plate 26. This allows for convenient and quick fixation of the pressure rod 22, improving the ease of installation between the ultrasonic transceiver 4 and the mounting tube 3.

[0034] It is worth mentioning that the upper surface of the display instrument 2 is provided with a display screen 30, and the upper surface of the display screen 30 is provided with a cover plate 31, which is rotatably connected to one side of the display screen 30. In addition, a rubber stopper 32 is provided at the end of the mounting tube 3 away from the measuring pipe 1. The rubber stopper 32 provides a certain degree of dust prevention.

[0035] The instructions for using this product are as follows:

[0036] In this invention, by inserting the mounting part 6 into the stepped hole 5, the pressure rod 22 in the snap-fit ​​assembly is used to press the pressure block 8, thereby compressing the spring 9. At this time, the sealing ring 7 is compressed radially along the mounting part 6, thus forming a sealing surface between the sealing ring 7 and the mounting part 6, and between the sealing ring 7 and the stepped hole 5, reducing the possibility of fluid medium leakage. When installing the pressure rod 22, the pin 23 is inserted from the opening of the slot 24, passes through the middle of the two columns 25, and enters the slot 24. Then, the pressure rod 22 is rotated, and the pin 23 presses the clamping plate 26 outward, compressing the spring 29. Under the elastic force of the spring 29, the pin 23 is clamped between the column 25 and the clamping plate 26. This allows for convenient and quick fixation of the pressure rod 22. The operation is simple and quick. Furthermore, by setting a filter assembly, interference from excessive impurities can be avoided when the ultrasonic flow meter measures the flow.

[0037] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. An ultrasonic flow meter, characterized in that, The device includes a cylindrical measuring pipe (1) with openings at both ends. A display instrument (2) is installed on the upper part of the outer wall of the measuring pipe (1). Two installation ports are opened on the measuring pipe (1), and installation pipes (3) are respectively installed at the two installation ports. An ultrasonic transceiver (4) is installed inside the installation pipe (3). The axes of the two ultrasonic transceivers (4) are inclined at an angle relative to the cross section of the measuring pipe (1). A stepped hole (5) is opened inside the installation pipe (3). An installation part (6) is fixedly connected to one side of the ultrasonic transceiver (4). Two sealing rings (7) are provided between the outer wall of the installation part (6) and the inner wall of the stepped hole (5). A pressure block (8) is provided on the side of the installation part (6) away from the ultrasonic transceiver (4). A spring (9) is provided below the pressure block (8). A snap-fit ​​assembly is provided on the side of the pressure block (8) away from the ultrasonic transceiver (4). The measuring pipe (1) is connected to an inlet pipe (10) and an outlet pipe (11) at both ends. A filter assembly is provided inside the inlet pipe (10) on the side close to the measuring pipe (1). The filter assembly includes a fixing ring (12) and a filter screen (13) disposed on the inner ring surface of the fixing ring (12).

2. The ultrasonic flow meter according to claim 1, characterized in that, The left end of the measuring pipe (1) is connected to flange one (14), and the right end of the measuring pipe (1) is connected to flange two (15). A temperature sensor (16) is provided on the upper surface of flange one (14), and a pressure sensor (17) is provided on the upper surface of flange two (15). One end of both the temperature sensor (16) and the pressure sensor (17) penetrates and extends into the interior of the measuring pipe (1).

3. The ultrasonic flow meter according to claim 1, characterized in that, The inlet pipe (10) and outlet pipe (11) are each provided with a flange three (18) at the end connected to the measuring pipe (1). At least two limiting grooves (19) are arranged in a ring array on the inner wall of the flange three (18). A limiting block (20) is provided on the outer ring surface of the fixing ring (12). The limiting block (20) and the limiting groove (19) are arranged in a one-to-one correspondence.

4. The ultrasonic flow meter according to claim 1, characterized in that, The upper layer of the stepped hole (5) is a square hole, and the lower layer is a circular hole. The diameter of the circular hole is less than the diagonal length of the square hole. The spring (9) is located inside the square hole of the stepped hole (5), and the sealing ring (7) is located inside the circular hole of the stepped hole (5).

5. The ultrasonic flow meter according to claim 1, characterized in that, The snap-fit ​​assembly includes a fixing seat (21) respectively disposed on both sides of the inner wall of the mounting tube (3), a pressure rod (22) is disposed between the two fixing seats (21), and two pins (23) are respectively disposed at both ends of the pressure rod (22). A slot (24) is provided on the fixing seat (21), and two columns (25) are symmetrically disposed in the slot (24). A locking plate (26) is disposed on one side of the column (25). A groove (27) is symmetrically disposed on the inner wall of the slot (24), and a rotating shaft (28) is disposed in the groove (27). One end of the locking plate (26) is fitted onto the rotating shaft (28).

6. The ultrasonic flow meter according to claim 5, characterized in that, A second spring (29) is also provided in the groove (27). The second spring (29) is connected to the end of the card plate (26) away from the rotating shaft (28). One end of the slot (24) passes through the side wall of the fixed seat (21) to form an opening.

7. The ultrasonic flow meter according to claim 1, characterized in that, The display instrument (2) has a display screen (30) on its upper surface and a cover plate (31) on its upper surface. The cover plate (31) is rotatably connected to one side of the display screen (30).

8. The ultrasonic flow meter according to claim 1, characterized in that, A rubber plug (32) is provided at the end of the installation pipe (3) away from the measuring pipe (1).

Images