Time difference method ultrasonic flowmeter for open channel and river channel

Abstract

The time difference method ultrasonic flowmeter comprises a cable and an assembling mechanism, the upper end of the cable is provided with a fixing frame through a clamping base, the upper end of the fixing frame is provided with a solar energy device, the output end of a motor is connected with a reverse screw rod, and the output end of the motor is connected with a power source. Fixing rods are installed at the left end and the right end of the surface of the reverse lead screw in a threaded mode, an ultrasonic flowmeter body is placed in the machine box, and fixing plates are installed on the left side and the right side of the ultrasonic flowmeter body. According to the time difference method ultrasonic flow meter for the open channel and the river channel, the ultrasonic flow meter body can be fixedly installed through the fixing mechanism, the effect of protecting the ultrasonic flow meter body is achieved, meanwhile, rapid disassembly and overhaul are convenient, the transducer assembly is convenient to assemble through the assembling mechanism, the effect of adjusting the length of the transducer assembly is achieved, and the time difference method ultrasonic flow meter is convenient to use. And a heat dissipation mechanism is arranged, so that the ultrasonic flowmeter is prevented from being damaged at high temperature.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic flowmeters, in particular to a time difference ultrasonic flowmeter used in open channels and rivers. Background Art

[0002] At present, the most widely used ultrasonic flowmeters are Doppler flowmeter and time difference flowmeter. Doppler flowmeter is suitable for water bodies with solid particles or bubbles in the water. Time difference flowmeter is mainly used for water bodies with small turbidity values ​​and flow velocity and flow measurement of oil bodies. The principle of time difference flowmeter is to reflect the flow velocity of the fluid by measuring the difference in the time reporting speed of ultrasonic pulse downstream and upstream. With the rapid development of society, the types of flowmeters are gradually increasing, and their functions are constantly improving, gradually improving their practicality.

[0003] For example, the patent document with application publication number CN114279509A discloses a complementary time-difference ultrasonic open channel metering device and metering method, the device includes: an integrator, a water level sensor and a plurality of flow velocity sensors, the integrator is fixed in a chassis on a vertical pole beside the channel, the integrator is connected to the water level sensor and the plurality of flow velocity sensors respectively, the water level sensor is suspended at the end of the horizontal arm of the vertical pole and installed perpendicular to the channel bottom, the plurality of flow velocity sensors are evenly distributed on both sides of the upstream and downstream of the open channel; the integrator includes a processor, the processor is used to determine whether the current channel environment has a flow velocity measurement environment based on the water level information collected by the water level sensor and the data collected by the flow velocity sensor, if not, switch to the water level flow metering mode, if yes, perform channel flow velocity collection based on the echo time difference preset channel collected by the flow velocity sensor and calculate the flow velocity corresponding to each channel in layers;

[0004] For example, the patent document with the authorization announcement number CN105181044B discloses an ultrasonic flowmeter, which belongs to the technical field of fluid flow measurement equipment. The flowmeter includes an outer shell, a meter head is arranged on the outside of the outer shell, an inner shell is coaxially arranged on the inside of the outer shell, a flow gap is arranged between the outer shell and the inner shell, a first reflector and a second reflector are arranged at both ends of the flow gap, the first reflector and the second reflector are provided with the same number of flow channels extending axially, the flow channels on the first reflector and the flow channels on the second reflector are coaxially arranged, the end of the first reflector is provided with a first reflection slope arranged in a conical shape, the end of the second reflector is provided with a second reflection slope arranged in a conical shape, the outer shell is provided with a first probe and a second probe at intervals, and the first probe and the second probe are connected to the meter head. The flowmeter of the present invention solves the technical problems of low measurement accuracy and narrow measurement range of the ultrasonic flowmeter of the time difference method, and can be widely used in fluid flow velocity measurement.

[0005] However, the construction of artificial cableway rotor flowmeters is complicated. Due to operational safety risks, they cannot be online in real time, and cannot measure too fast or too slow. Radar flow measurement on the water surface is inconvenient to adjust the length of the transducer assembly and inconvenient to quickly disassemble and assemble. Therefore, we propose a time difference ultrasonic flowmeter for open channels and rivers to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a time-difference ultrasonic flowmeter for open channels and rivers, so as to solve the problems mentioned in the above background technology that the existing ultrasonic flowmeters have complex construction of artificial cableway rotor flowmeters, cannot be online in real time due to operational safety risks, cannot measure too fast or too slow, are inconvenient to adjust the length of the transducer assembly, and are inconvenient to quickly disassemble and assemble.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a time-difference ultrasonic flowmeter for open channels and rivers, comprising a cable and an assembly mechanism, a fixing frame is installed on the upper end of the cable through a card seat, a solar energy is installed on the upper end of the fixing frame, and also comprises a chassis and a fixing mechanism, a chassis is installed on the front side of the upper end of the cable, the fixing mechanism comprises a motor, a reverse screw, a fixing rod and a fixing plate, a motor is installed on the upper end of the chassis, a reverse screw is connected to the output end of the motor, a fixing rod is threadedly installed on the left and right ends of the reverse screw surface, a support plate is installed on the lower end of the fixing rod, an ultrasonic flowmeter body is placed inside the chassis, a fixing plate is installed on the left and right sides of the ultrasonic flowmeter body, a bracket is installed on the rear side of the cable, and a liquid level meter is installed inside the bracket;

[0008] The assembling mechanism comprises a mounting plate, a rotating plate and positioning holes. The left and right sides of the upper end of the mounting plate are both rotatably mounted with rotating plates, and the front side and the left side of the rotating plate are both provided with positioning holes.

[0009] Preferably, a seat plate is installed on the rear side of the chassis, and the chassis forms a disassembly structure through the seat plate, screws and cables.

[0010] Preferably, the fixing rod forms a left-right sliding structure with the chassis through a motor, a reverse screw rod and a slide groove.

[0011] Preferably, the surfaces of the fixing plates on the left and right sides of the ultrasonic flowmeter body are provided with limiting grooves, and the ultrasonic flowmeter body and the chassis form a disassembly structure through the fixing rod, the fixing plate and the limiting grooves.

[0012] Preferably, a heat dissipation port is provided at the bottom of the chassis, a dust cover is installed inside the heat dissipation port, and a heat dissipation fan is installed inside the dust cover.

[0013] Preferably, a transducer assembly is mounted on the surface of the mounting plate, and the transducer assembly forms a disassembly structure with the mounting plate via a buckle plate and screws.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the time difference ultrasonic flow meter for open channels and rivers;

[0015] 1. Set up a fixing mechanism, the motor drives the reverse screw to rotate, so as to drive the fixing rod to move left and right in the chassis, and move the fixing rod to the limit grooves of the fixing plates on the left and right sides of the ultrasonic flowmeter body, so as to clamp and fix the ultrasonic flowmeter body. The support plate at the lower end of the fixing rod can support and stabilize the ultrasonic flowmeter body, so as to fix and install the ultrasonic flowmeter body, and facilitate quick disassembly and maintenance;

[0016] 2. Set up an assembly mechanism. The transducer assembly is fixedly mounted on the mounting plate by means of a gusset plate and screws, which facilitates quick disassembly of the transducer assembly. The left and right sides of the upper end of the mounting plate are rotatably mounted with a rotating plate. The rotating plate is rotated to a vertical state, and then the screws are aligned with the positioning holes to fix and assemble the transducer assembly, which plays a role in adjusting the length of the transducer assembly. It is suitable for open channels and rivers of different depths, which improves practicality.

[0017] 3. Set up a heat dissipation mechanism. The chassis is used outdoors for a long time. The chassis plays a role in protecting the ultrasonic flowmeter body. The cooling fan can accelerate the heat dissipation in the chassis and prevent the ultrasonic flowmeter from being damaged by high temperature. The dust cover prevents dust from entering the chassis through the heat dissipation port. The cooling fan can blow away the dust on the surface of the dust cover, saving a certain amount of cleaning work. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a side view of the structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the front view cutaway structure of the chassis of the utility model;

[0020] Figure 3 This is a schematic diagram of the cutaway structure of the chassis of the utility model from a side view;

[0021] Figure 4 This is a schematic diagram of the side structure of the transducer of the utility model;

[0022] Figure 5 This is a schematic diagram of the front view structure of the transducer of the utility model.

[0023] In the figure: 1. Cable; 2. Fixing frame; 3. Solar panel; 4. Chassis; 5. Motor; 6. Reverse screw; 7. Fixing rod; 8. Support plate; 9. Ultrasonic flow meter body; 10. Fixing plate; 11. Limiting groove; 12. Seat plate; 13. Cooling fan; 14. Dust cover; 15. Bracket; 16. Liquid level meter; 17. Transducer assembly; 18. Mounting plate; 19. Turn plate; 20. Positioning hole. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-5 The utility model provides a technical solution: a time difference ultrasonic flowmeter for open channels and rivers, including a cable 1, a fixing frame 2, a solar panel 3, a chassis 4, a motor 5, a reverse screw 6, a fixing rod 7, a support plate 8, an ultrasonic flowmeter body 9, a fixing plate 10, a limit groove 11, a seat plate 12, a cooling fan 13, a dust cover 14, a bracket 15, a liquid level meter 16, a transducer assembly 17, a mounting plate 18, a rotating plate 19 and a positioning hole 20, such as Figure 1 and Figure 2 As shown, the upper end of the cable 1 is fixed with a fixing frame 2 through a clamp and screws, and a solar panel 3 is installed on the upper end of the fixing frame 2. The solar panel 3 can absorb solar energy and convert it into electrical energy to increase the amount of electricity. It can monitor in real time to ensure the normal operation of the measurement work. Unscrewing the screws on the fixing frame 2 facilitates the disassembly and maintenance of the fixing frame 2 and the solar panel 3;

[0026] The front side of the upper end of the cable 1 is fixedly installed with a chassis 4 through a seat plate 12 and screws. The cable 1 is fixedly installed on the bank of an open channel or river channel to be measured. A box door is installed on the front side of the box 4. The box door is opened, and the ultrasonic flowmeter body 9 is placed in the box 4. A motor 5 is installed on the upper end of the inside of the box 4. The output end of the motor 5 is connected to a reverse screw rod 6. The left and right ends of the reverse screw rod 6 are threadedly installed with a fixing rod 7. When the motor 5 is turned on, the motor 5 drives the reverse screw rod 6 to rotate, thereby driving the fixing rod 7 to move left and right, and the ultrasonic flowmeter body The left and right sides of 9 are fixedly installed with fixing plates 10, and the surface of the fixing plate 10 is provided with a limiting groove 11. The fixing rod 7 is moved into the limiting groove 11 on the surface of the fixing plate 10. A slide groove is provided at the lower end of the inside of the chassis 4, and the fixing rod 7 slides in the slide groove accordingly. The fixing rod 7 clamps and fixes the ultrasonic flowmeter body 9. A support plate 8 is installed at the lower end of the fixing rod 7. The support plate 8 can support and stabilize the ultrasonic flowmeter body 9, which is convenient for quickly fixing and installing the ultrasonic flowmeter body 9. The chassis 4 plays a role in protecting the ultrasonic flowmeter body 9;

[0027] like Figure 2 and Figure 3 As shown, when the ultrasonic flowmeter body 9 needs to be disassembled, the motor 5 drives the reverse screw rod 6 to rotate in the reverse direction, which can drive the fixing rod 7 to move out of the limiting groove 11, so as to facilitate the disassembly of the ultrasonic flowmeter body 9, and to facilitate the replacement and maintenance of the ultrasonic flowmeter body 9. A seat plate 12 is fixedly installed on the rear side of the chassis 4, and screws are installed on the surface of the seat plate 12. Unscrewing the screws makes it convenient to remove the seat plate 12 from the cable 1, and to facilitate the disassembly of the chassis 4;

[0028] A heat dissipation port is provided at the bottom of the chassis 4, a dust cover 14 is installed inside the heat dissipation port, a heat dissipation fan 13 is installed inside the dust cover 14, and the heat dissipation fan 13 is turned on, and the heat dissipation fan 13 can accelerate the dissipation of hot air in the chassis 4, improve the heat dissipation effect of the ultrasonic flow meter body 9, and prevent the ultrasonic flow meter body 9 from being damaged by high temperature. The dust cover 14 prevents dust from entering the chassis 4, and avoids dust from accumulating on the ultrasonic flow meter body 9, causing aging of the ultrasonic flow meter body 9;

[0029] like Figure 4 and Figure 5As shown, the length of the transducer assembly 17 is adjusted according to the depth of the river channel. The transducer assembly 17 is fixedly mounted on the mounting plate 18 by means of a gusset plate and screws. The screws on the surface of the gusset plate are unscrewed to facilitate the removal, replacement and maintenance of the transducer assembly 17. Turning plates 19 are rotatably mounted on both sides of the upper end of the mounting plate 18. When the transducer assembly 17 does not need to be assembled, the turning plate 19 is vertical to the mounting plate 18. Positioning holes 20 are provided on the side of the turning plate 19, so that the turning plate 19 can be fixedly mounted on the river bank. The mounting plate 18 and the transducer assembly 17 are fixedly installed. When the river channel is deep, the rotating plate 19 at the upper end of the mounting plate 18 is rotated to a vertical state. A positioning hole 20 is opened on the surface of the rotating plate 19. The two sets of mounting plates 18 and the transducer assembly 17 are assembled by aligning the positioning hole 20 with a screw. The length of the transducer assembly 17 can be adjusted to be suitable for rivers of different depths. A bracket 15 is fixedly installed on the bank of the river channel. A liquid level meter 16 is installed inside the bracket 15 to monitor the flow of the river channel.

[0030] The flow velocity is measured based on the time difference method principle of the ultrasonic flowmeter body 9. The whole section of the surface laminar flow is measured, and there will be no blind area for flow measurement. It can be used for sewage, wastewater and waters with high sand content. The intelligent drive ensures the signal strength. It can be configured with a single sound path, a multi-path system and a cross sound path. It only needs to collect the ultrasonic signal. Since the frequency of the transducer component 17 is low, it can cross the larger particles in the water. The actual measured sand content can reach 50KG / M³. Also, because the related transducer component 17 has a large power and can be transmitted farther, the actual measurement can reach 150M. The velocity resolution calculated by the time difference method can be measured to 0.001M / S. The transducer component 17 can be installed with water, which is suitable for natural rivers and channels where water cannot be stopped.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A time difference ultrasonic flow meter for open channels and rivers, comprising a cable (1) and an assembly mechanism, wherein a fixing frame (2) is mounted on the upper end of the cable (1) via a holder, and a solar panel (3) is mounted on the upper end of the fixing frame (2), characterized in that: It also comprises a case (4) and a fixing mechanism, wherein the case (4) is installed on the front side of the upper end of the cable (1), and the fixing mechanism comprises a motor (5), a reverse screw (6), a fixing rod (7) and a fixing plate (10), wherein the motor (5) is installed at the upper end inside the case (4), the output end of the motor (5) is connected to the reverse screw (6), the fixing rods (7) are threadedly installed at both left and right ends of the surface of the reverse screw (6), and the lower end of the fixing rod (7) is installed with a support plate (8), an ultrasonic flow meter body (9) is placed inside the case (4), and the fixing plates (10) are installed on both left and right sides of the ultrasonic flow meter body (9), and a bracket (15) is installed on the rear side of the cable (1), and a liquid level meter (16) is installed inside the bracket (15); The assembly mechanism comprises a mounting plate (18), a rotating plate (19) and a positioning hole (20); the rotating plates (19) are rotatably mounted on both left and right sides of the upper end of the mounting plate (18); and the positioning holes (20) are provided on the front side and the left side of the rotating plate (19).

2. The time difference ultrasonic flowmeter for open channels and rivers according to claim 1, characterized in that: A seat plate (12) is installed on the rear side of the chassis (4), and the chassis (4) forms a disassembly structure through the seat plate (12) and screws and cables (1).

3. The time difference ultrasonic flowmeter for open channels and rivers according to claim 1, characterized in that: The fixed rod (7) forms a left-right sliding structure with the chassis (4) via the motor (5), the reverse screw rod (6) and the slide groove.

4. The time difference ultrasonic flow meter for open channels and rivers according to claim 1, characterized in that: Limiting grooves (11) are provided on the surfaces of the fixing plates (10) on the left and right sides of the ultrasonic flow meter body (9); the ultrasonic flow meter body (9) and the chassis (4) form a disassembly structure via the fixing rod (7), the fixing plate (10) and the limiting grooves (11).

5. The time difference ultrasonic flowmeter for open channels and rivers according to claim 1, characterized in that: A heat dissipation port is provided at the bottom of the chassis (4), a dust cover (14) is installed inside the heat dissipation port, and a heat dissipation fan (13) is installed inside the dust cover (14).

6. The time difference ultrasonic flow meter for open channels and rivers according to claim 1, characterized in that: A transducer assembly (17) is mounted on the surface of the mounting plate (18); the transducer assembly (17) and the mounting plate (18) form a disassembly structure via a buckle plate and screws.

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