Ultrasonic flowmeter
By designing a removable reflective tube-type bracket module and W-type reflective structure in an ultrasonic flowmeter, the fluid barrier and bubble problems caused by the reflective sheet position are solved, and the smooth flow and high-precision detection of the fluid are achieved, and the different flow ranges are adapted to. And support cleaning and expansion.
Patent Information
- Application Number
- CN202411320147.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2024-12-17
AI Technical Summary
In existing ultrasonic flowmeters, the reflector sheet is located in the middle of the flow channel of the pipe, causing fluid blockage, resulting in inaccurate detection results or inability to test, especially in low flow velocity areas, which easily stays bubbles, affecting the detection results.
Design an ultrasonic flowmeter including a pipe section body, a removable reflective tube-type bracket module and an ultrasonic sensor. The reflective tube-type bracket is equipped with a W-type reflective structure and arc angle to prevent fluid blocking and bubble formation and through different The inner diameter bracket module adapts to different flow ranges.
It realizes smooth flow of fluid, reduces bubble adhesion, improves detection accuracy, and supports testing and reflective surface cleaning in different flow ranges, reducing pressure loss.
Smart Images
Figure CN119147059A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of ultrasonic flow tubes, in particular to an ultrasonic flow meter. Background Art
[0002] Ultrasonic flowmeter is an instrument that measures flow by detecting the effect of fluid flow on ultrasonic beam (or ultrasonic pulse). Ultrasonic flowmeter has a wide range of applications, such as raw water flow measurement in rivers, reservoirs, seawater flow measurement, marine environment monitoring and forecasting, municipal sewage measurement, tap water flow measurement, oil field raw flow measurement, cementing mud flow measurement, petrochemical and petrochemical product process flow detection, industrial circulating water flow measurement, production process water consumption measurement, process flow measurement and control, etc. For ultrasonic flowmeter, the flow state of the medium flowing through its internal metering pipe section is an important factor affecting the measurement accuracy of ultrasonic flowmeter.
[0003] However, in the common structure of ultrasonic flowmeters, the reflector used for ultrasonic transmission is generally installed in the middle of the flow channel of the metering pipe section through a column-type or insert-type structure. However, these methods will block the fluid when it flows through, resulting in the fluid entering the measuring pipe section being unstable. When the switch is turned on to let in water, bubbles are easily retained in the low flow rate area, causing inaccurate test results or the problem of being unable to test. At the same time, because the reflector is installed in the middle of the flow channel, there is a large pressure loss at a high flow rate, and it is also very easy to generate bubbles, affecting the test results. Summary of the invention
[0004] In order to overcome the defects of the prior art, the present invention provides an ultrasonic flow meter to solve the problem in the prior art that the detection result is inaccurate or cannot be tested due to fluid obstruction caused by the reflector being located in the middle of the flow channel of the pipe section.
[0005] The technical solution adopted by the present invention to solve its technical problems is: an ultrasonic flowmeter, including a pipe section main body, one end of the pipe section main body is provided with a water inlet joint, and the other end is provided with a water outlet joint, a reflective tube type bracket module is detachably installed in the pipe section main body, the reflective tube type bracket module includes a tubular bracket, one end of the tubular bracket close to the water inlet joint is a water inlet, and the other end is a water outlet, a reflective surface of an integrated structure is provided at the lower end of the tubular bracket, a first ultrasonic sensor is provided on one side of the upper end of the pipe section main body, and a second ultrasonic sensor is provided on the other side, and the first ultrasonic sensor and the second ultrasonic sensor are both corresponding to the reflective surface up and down.
[0006] The water inlet joint of this solution is the water inlet end, and the water outlet joint is the water outlet end, so that when the water inlet is switched on, after the water flows into the tubular bracket, the reflective surface at the lower end of the tubular bracket can prevent the fluid from being blocked, thereby preventing the fluid entering the measuring pipe section from being unstable, and causing little disturbance to the fluid flowing through the flow channel, and it is impossible to hide bubbles, thereby preventing the ultrasonic sensor from affecting the detection results; and the same ultrasonic flowmeter can meet the test of different flow ranges by replacing the reflective tube bracket module with different inner diameters, and can be used with different standard pipe section joints to quickly replace and disassemble the original pipe section flowmeter. At the same time, since the surface of the reflective tube bracket module may be fouled after long-term use, the reflective tube bracket module can be disassembled and cleaned.
[0007] As a further improvement of the above technical solution, the reflection surface includes a first reflection bevel located on one side of the lower end of the tubular support, a second reflection bevel on the other side, and a reflection plane located at the upper end of the tubular support, the first ultrasonic sensor corresponds to the first reflection bevel up and down, and the second ultrasonic sensor corresponds to the second reflection bevel up and down, so that a W-shaped reflection structure is formed between the first ultrasonic sensor, the second ultrasonic sensor, the first reflection bevel, the second reflection bevel and the reflection plane. The formed W-shaped reflection structure can detect the flow rate while preventing flow obstruction in the middle of the flow channel, more effectively reduce the disturbance of the fluid flowing through the flow channel, and make it impossible to hide bubbles in the tubular support.
[0008] As a further improvement of the above technical solution, the upper end of the tubular support is provided with an ultrasonic emission port corresponding to the first reflection slope, the ultrasonic emission port corresponds to the first ultrasonic sensor, the water outlet is an oblique opening, so that the radial length of the upper part of the tubular support is smaller than the radial length of the lower part, and the second reflection slope corresponds to the upper part of the oblique opening, so that the second reflection slope corresponds to the second ultrasonic sensor. The reflection slope can correspond to the ultrasonic emission port, thereby realizing ultrasonic reflection, and the detection result can be made more accurate while reducing fluid disturbance.
[0009] As a further improvement of the above technical solution, a guide boss is provided between the ultrasonic emission port and the oblique opening, the reflection plane is located on the surface of the guide boss, the guide boss and the tubular bracket are an integrated structure, and arc angles are provided on both sides of the tubular bracket. It can effectively avoid the formation of turbulence, which causes high-frequency mechanical impact on the protruding parts, causing the air dissolved in the water to be released, generating bubbles and attaching to the reflecting inclined surface; at the same time, the structure can enable the water flow to flush to the low flow rate area. Since the low flow rate area is prone to the accumulation of liquid or gas, this effect can flush the surface of the reflecting inclined surface, so that the bubbles generated when the water flow is switched on and off can be carried away by the water flow.
[0010] As a further improvement of the above technical solution, the radius of the arc angle is 0.5-2 mm, which can better guide the fluid.
[0011] As a further improvement of the above technical solution, the first reflecting bevel, the second reflecting bevel and the tubular support are an integrated structure, the first reflecting bevel and the second reflecting bevel are made of metal, and the tubular support is made of plastic. The metal material and the plastic material are integrally formed by injection molding, which can effectively reduce the protruding height between the reflecting bevel and the tubular support and reduce the pressure loss of the entire pipe section.
[0012] As a further improvement of the above technical solution, a bracket snap ring groove is provided on the inner wall of one end of the pipe section body near the water inlet, a sealing ring groove is provided on the side of the bracket snap ring groove near the water inlet, a snap ring is provided on the side of the tubular bracket near the water inlet, the snap ring is clamped in the bracket snap ring groove, a sealing ring is provided in the sealing ring groove, the water inlet joint is threadedly connected to the pipe section body, the water inlet joint presses on one side of the sealing ring, so that the other side of the sealing ring presses on the snap ring. Thereby, the tubular bracket can be better axially fixed in the pipe section body, with high firmness and stability.
[0013] As a further improvement of the above technical solution, positioning grooves are provided on both sides of the outer wall of the tubular support, and the positioning grooves are arranged along the radial direction of the pipe section body, and positioning convex ribs corresponding to the positioning grooves are arranged on both sides of the inner wall of the pipe section body. Through the cooperation of the positioning grooves and the positioning convex ribs, the tubular support is further more reliably fixed in the axial direction, and the longitudinal reflection surface of the reflection slope is fixed to ensure the consistency of the installation of the reflection signal.
[0014] As a further improvement of the above technical solution, the distance between the first reflecting bevel and the second reflecting bevel is 25-45 mm.
[0015] As a further improvement of the above technical solution, a curved wall is provided on the side of the first reflective slope close to the water inlet joint, which can effectively reduce the direct obstruction of the tubular support to the water flow, stabilize the flow field, and reduce the pressure loss.
[0016] The beneficial effects of the present invention are:
[0017] 1. This low pressure loss ultrasonic flowmeter has the advantages of easy installation, no bubble adhesion, and strong later expandability. It can realize effective and controllable measurement of fluids in pipe sections with different installation requirements.
[0018] 2. Through the replaceable tubular brackets with different inner diameters, it can meet the test of different flow ranges, cooperate with different standard pipe section joints, and also facilitate the cleaning of the reflective slope.
[0019] 3. The arc design is added to the top and corners of the tubular bracket, and the inclined reflective slope can effectively avoid the formation of turbulence and cause high-frequency mechanical impact on the protruding parts, that is, reduce the generation of bubbles and their attachment to the reflective slope; secondly, this structure allows the water flow to flush to the low flow rate area, that is, the inclined position and the corner position, which can flush the surface of the reflective slope, so that the bubbles generated when the water flow is switched on and off can be carried away by the water flow, and it also plays a role in stabilizing the flow field and reducing pressure loss. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the low pressure loss ultrasonic flowmeter of the present invention.
[0021] Figure 2 It is a schematic diagram of the internal structure of the low pressure loss ultrasonic flowmeter of the present invention.
[0022] Figure 3 for Figure 2 Schematic diagram of the enlarged structure at point A in the middle.
[0023] Figure 4 Schematic diagram of the internal structure of the pipe section.
[0024] Figure 5 It is a schematic diagram of the side structure of the tubular support.
[0025] Figure 6 A schematic diagram of the top view of the tubular support.
[0026] Figure 7 Schematic diagram of flow field simulation of tubular support.
[0027] Figure 8 This is the experimental diagram of the pressure loss of the pipe section.
[0028] In the figure: pipe section body 1, water inlet joint 2, water outlet joint 3, temperature sensor mounting seat 4, integrating box 5, first ultrasonic sensor 6, second ultrasonic sensor 7, reflective tube bracket module 8, bracket snap ring groove 9, sealing ring groove 10, sealing ring 11, tubular bracket 12, snap ring 13, oblique opening 14, first reflecting slope 15, second reflecting slope 16, ultrasonic emitting port 17, reflecting plane 18, arc angle 19, positioning slide groove 20, arc wall 21. DETAILED DESCRIPTION
[0029] The specific embodiments of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0030] Combination Figures 1 to 6 The ultrasonic flow meter shown in the figure comprises a pipe section body 1, one end of the pipe section body 1 is provided with a water inlet joint 2, and the other end is provided with a water outlet joint 3, a reflective tubular bracket module 8 is detachably installed in the pipe section body 1, and the reflective tubular bracket module 8 comprises a tubular bracket 12, one end of the tubular bracket 12 close to the water inlet joint 2 is a water inlet, and the other end is a water outlet, and a reflective surface of an integrated structure is provided at the lower end of the tubular bracket 12, a first ultrasonic sensor 6 is provided on one side of the upper end of the pipe section body 1, and a second ultrasonic sensor 7 is provided on the other side, and the first ultrasonic sensor 6 and the second ultrasonic sensor 7 are both in an upward direction with respect to the reflective surface The following corresponds; the water inlet connector 2 of this solution is the water inlet end, and the water outlet connector 3 is the water outlet end, so that when the water inlet is switched on, after the water flows into the tubular bracket 12, the reflective surface at the lower end of the tubular bracket 12 can prevent the fluid from being blocked, thereby preventing the fluid entering the measuring pipe section from being unstable, and the fluid flowing through the flow channel is less disturbed, and bubbles cannot be hidden, preventing the ultrasonic sensor from affecting the detection result; and the same ultrasonic flowmeter can meet the test of different flow ranges by replacing the reflective tube bracket module 8 with different inner diameters, and can be used with different standard pipe section connectors to quickly replace and disassemble the original pipe section flowmeter. At the same time, since the surface of the reflective tube bracket module 8 may be fouled after long-term use, the reflective tube bracket module 8 can be disassembled and cleaned.
[0031] It is worth noting that an integration box 5 is installed at the upper end of the pipe section body 1 of the present embodiment, and the integration box 5 is respectively connected to the first ultrasonic sensor 6 and the second ultrasonic sensor 7, and a temperature sensor mounting seat 4 can be provided on the side of the pipe section body 1 close to the water outlet joint 3, so that the temperature sensor mounting seat 4 is clamped and installed on the pipe section body 1 through the water outlet joint 3. Similarly, a pressure sensor or a display module can be clamped and installed, which has strong expansibility and low development cost.
[0032] The reflecting surface of the present embodiment includes a first reflecting bevel 15 located on one side of the lower end of the tubular support 12, a second reflecting bevel 16 on the other side, and a reflecting plane 18 located on the upper end of the tubular support 12. The first ultrasonic sensor 6 corresponds to the first reflecting bevel 15 in the upper and lower parts, and the second ultrasonic sensor 7 corresponds to the second reflecting bevel 16 in the upper and lower parts, so as to form a W-shaped reflecting structure between the first ultrasonic sensor 6, the second ultrasonic sensor 7, the first reflecting bevel 15, the second reflecting bevel 16 and the reflecting plane 18. The formed W-shaped reflecting structure can detect the flow rate while preventing the flow blockage in the middle of the flow channel, and more effectively reduce the disturbance of the fluid flowing through the flow channel, so that bubbles cannot be hidden in the tubular support 12. It is worth noting that the distance between the first reflecting bevel 15 and the second reflecting bevel 16 in the present embodiment is 25-45mm.
[0033] The upper end of the tubular support 12 of this embodiment is provided with an ultrasonic emission port 17 corresponding to the first reflection slope 15, the ultrasonic emission port 17 corresponds to the first ultrasonic sensor 6, the water outlet is an oblique opening 14, so that the radial length of the upper part of the tubular support 12 is smaller than the radial length of the lower part, and the second reflection slope 16 corresponds to the upper part of the oblique opening 14, so that the second reflection slope 16 corresponds to the second ultrasonic sensor 7. The reflection slope can correspond to the ultrasonic emission port, thereby realizing ultrasonic reflection, and the detection result can be made more accurate while reducing fluid disturbance.
[0034] In this embodiment, a guide boss is arranged between the ultrasonic emission port 17 and the inclined opening 14, and the reflecting plane 18 is located on the surface of the guide boss. The guide boss and the tubular bracket 12 are an integral structure, and arc angles 19 are arranged on both sides of the tubular bracket 12. It can effectively avoid the formation of turbulence and cause high-frequency mechanical impact on the protruding parts, causing the air dissolved in the water to be released, generating bubbles and attaching to the reflecting inclined surface; at the same time, this structure can enable the water flow to be flushed to the low flow rate area. Since liquid or gas accumulation is easily formed in the low flow rate area, this effect can flush the surface of the reflecting inclined surface, so that the bubbles generated when the water flow is switched on and off can be carried away by the water flow.
[0035] It is worth noting that the radius of the arc angle 19 of the present embodiment is 0.5-2 mm, which can better guide the fluid. In addition, the first reflecting slope 15 of the present embodiment is also provided with an arc wall 21 on the side close to the water inlet joint 2, and the second reflecting slope 16 is also provided with an arc on the side close to the water outlet joint 3, which can effectively reduce the direct obstruction of the tubular support 12 to the water flow, stabilize the flow field, and reduce the pressure loss.
[0036] like Figure 7 As shown, the flow rate of the fluid in the tubular support 12 is relatively more uniform, which can more effectively prevent the accumulation of bubbles. Figure 8 As shown, the fluid flows through the tubular support 12 at a flow rate of 150 L / min. The pressure loss of the tubular support 12 is about 11 kPa, which is lower than the pressure loss of existing products.
[0037] It is also worth mentioning that the first reflecting bevel 15, the second reflecting bevel 16 and the tubular bracket 12 of the present embodiment are an integrated structure, the first reflecting bevel 15 and the second reflecting bevel 16 are made of metal, and the tubular bracket 12 is made of plastic; the metal material and the plastic material are integrally molded by injection molding, which can effectively reduce the protruding height between the reflecting bevel and the tubular bracket 12 and reduce the pressure loss of the entire pipe section.
[0038] In order to improve the stability of the tubular bracket 12 in the pipe section body 1, a bracket snap ring groove 9 is opened on the inner wall of one end of the pipe section body 1 close to the water inlet, a sealing ring groove 10 is arranged on the side of the bracket snap ring groove 9 close to the water inlet, a snap ring 13 is arranged on the side of the tubular bracket 12 close to the water inlet, the snap ring 13 is clamped in the bracket snap ring groove 9, a sealing ring 11 is arranged in the sealing ring groove 10, the water inlet joint 2 is threadedly connected to the pipe section body 1, and the water inlet joint 2 presses on one side of the sealing ring 11, so that the other side of the sealing ring 11 presses on the snap ring 13. Thereby, the tubular bracket 12 can be better axially fixed in the pipe section body 1, and the firmness and stability are high.
[0039] Both sides of the outer wall of the tubular support 12 are provided with positioning grooves 20, which are arranged along the radial direction of the pipe section body 1, and both sides of the inner wall of the pipe section body 1 are provided with positioning convex ribs corresponding to the positioning grooves 20. Through the cooperation of the positioning grooves 20 and the positioning convex ribs, the tubular support 12 is further more reliably fixed in the axial direction, and the longitudinal reflection surface of the reflection slope is fixed to ensure the consistency of the installation of the reflection signal.
[0040] The low-pressure-loss ultrasonic flowmeter of the present invention has the advantages of easy installation, no bubble adhesion, and strong later expandability. It can realize effective and controllable measurement of pipe segment fluids with different installation requirements. Moreover, by replacing the tubular bracket 12 with different inner diameters, it can meet the test of different flow ranges, cooperate with different standard pipe segment joints, and facilitate the cleaning of the reflecting slope. At the same time, the top and corners of the tubular bracket 12 are added with arc designs, which, in conjunction with the inclined reflecting slope, can effectively avoid the formation of turbulence and cause high-frequency mechanical impacts on the protruding parts, that is, reduce the generation of bubbles and their attachment to the reflecting slope. Secondly, the structure can enable the water flow to flush to the low flow rate area, that is, the inclined position and the corner position. This effect can flush the surface of the reflecting slope, so that the bubbles generated when the water flow is switched on and off can be carried away by the water flow, and it also plays a role in stabilizing the flow field and reducing pressure loss.
[0041] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.
Claims
1. An ultrasonic flow meter, comprising a pipe section body (1), one end of the pipe section body (1) is provided with a water inlet joint (2), and the other end is provided with a water outlet joint (3), characterized in that: A reflective tubular support module (8) is detachably installed in the pipe section body (1), and the reflective tubular support module (8) comprises a tubular support (12), one end of the tubular support (12) close to the water inlet joint (2) is a water inlet, and the other end is a water outlet, and a reflective surface of an integrated structure is arranged at the lower end of the tubular support (12), a first ultrasonic sensor (6) is arranged on one side of the upper end of the pipe section body (1), and a second ultrasonic sensor (7) is arranged on the other side, and the first ultrasonic sensor (6) and the second ultrasonic sensor (7) are both arranged in upper and lower correspondence with the reflective surface.
2. An ultrasonic flowmeter according to claim 1, characterized in that: The reflecting surface comprises a first reflecting inclined surface (15) located at one side of the lower end of the tubular support (12), a second reflecting inclined surface (16) at the other side, and a reflecting plane (18) located at the upper end of the tubular support (12); the first ultrasonic sensor (6) corresponds to the first reflecting inclined surface (15) in upper and lower positions; the second ultrasonic sensor (7) corresponds to the second reflecting inclined surface (16) in upper and lower positions; and a W-shaped reflecting structure is formed between the first ultrasonic sensor (6), the second ultrasonic sensor (7), the first reflecting inclined surface (15), the second reflecting inclined surface (16) and the reflecting plane (18).
3. An ultrasonic flow meter according to claim 2, characterized in that: The upper end of the tubular support (12) is provided with an ultrasonic emission port (17) corresponding to the first reflective slope (15), and the ultrasonic emission port (17) corresponds to the first ultrasonic sensor (6). The water outlet is an oblique opening (14), so that the radial length of the upper part of the tubular support (12) is smaller than the radial length of the lower part. The second reflective slope (16) corresponds to the upper part of the oblique opening (14), so that the second reflective slope (16) corresponds to the second ultrasonic sensor (7).
4. An ultrasonic flow meter according to claim 3, characterized in that: A flow guide boss is provided between the ultrasonic emission port (17) and the oblique opening (14); the reflection plane (18) is located on the surface of the flow guide boss; the flow guide boss and the tubular support (12) are an integrated structure; arc angles (19) are provided on both sides of the tubular support (12).
5. An ultrasonic flow meter according to claim 4, characterized in that: The arc radius of the arc angle (19) is 0.5-2 mm.
6. An ultrasonic flow meter according to claim 4, characterized in that: The first reflecting bevel (15), the second reflecting bevel (16) and the tubular support (12) are an integrated structure; the first reflecting bevel (15) and the second reflecting bevel (16) are made of metal, and the tubular support (12) is made of plastic.
7. An ultrasonic flow meter according to claim 2, characterized in that: A bracket snap ring groove (9) is provided on the inner wall of one end of the pipe section body (1) close to the water inlet, a sealing ring groove (10) is provided on the side of the bracket snap ring groove (9) close to the water inlet, a snap ring (13) is provided on the side of the tubular bracket (12) close to the water inlet, the snap ring (13) is snapped into the bracket snap ring groove (9), a sealing ring (11) is provided in the sealing ring groove (10), the water inlet joint (2) is threadedly connected to the pipe section body (1), the water inlet joint (2) is pressed against one side of the sealing ring (11), so that the other side of the sealing ring (11) is pressed against the snap ring (13).
8. An ultrasonic flow meter according to claim 7, characterized in that: Positioning grooves (20) are provided on both sides of the outer wall of the tubular support (12), and the positioning grooves (20) are arranged along the radial direction of the pipe section body (1). Positioning convex ribs corresponding to the positioning grooves (20) are provided on both sides of the inner wall of the pipe section body (1).
9. An ultrasonic flow meter according to claim 2, characterized in that: The distance between the first reflecting inclined surface (15) and the second reflecting inclined surface (16) is 25-45 mm.
10. An ultrasonic flow meter according to claim 2, characterized in that: A curved wall (21) is provided on one side of the first reflecting inclined surface (15) close to the water inlet joint (2).