Ultrasonic open channel flowmeter

Abstract

The utility model discloses an ultrasonic open channel flowmeter which comprises a Parshall groove, the Parshall groove comprises a contraction section, a throat section and a diffusion section which are sequentially arranged, the throat section and the diffusion section are integrally formed, and the contraction section and the throat section are arranged in a split mode and detachably connected. The contraction section comprises a bottom plate and a movable side plate, the movable side plate comprises a side baffle and a first insertion plate vertically fixed to the bottom side of the side baffle, and first sliding grooves allowing the first insertion plate to be inserted are formed in the two side walls, close to the side baffle, of the bottom plate; the ends, close to the throat section, of the side baffles are provided with connecting pieces, and the side baffles are fixedly connected with the throat section through the connecting pieces. According to the utility model, the contraction section is independently arranged, and only the contraction section is replaced according to the actual channel specification, so that the cost is reduced while the measurement effect is ensured; the contraction section is of an assembly type structure, the distance between the two movable side plates can be adjusted in a sliding mode so that the contraction section can be better attached to the side wall of the channel, the influence of channel excavation construction errors is reduced, and the accuracy of measured data is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of open channel flowmeters, in particular to an ultrasonic open channel flowmeter. Background Art

[0002] For rivers and channels with standard cross-sections, open channel flow meters are generally used to collect and measure water levels, flow rates, and flow rates. Open channel flow meters generally collect water levels and flow rates through sensors, and then calculate the instantaneous flow rate based on the pre-set cross-section parameters and the hydrodynamic model, and obtain the cumulative flow rate through time accumulation.

[0003] An existing ultrasonic open channel flowmeter is mainly composed of a Parshall flume and an ultrasonic sensor. The Parshall flume usually includes an integrally formed contraction section, throat section and diffusion section. During measurement, the Parshall flume is installed in the open channel, and the water flows through the contraction section, throat section and diffusion section in sequence. The Parshall flume converts the flow in the open channel into the height of the liquid level, and uses the reflection principle of the ultrasonic sensor to measure the water level in the flume, and then calculates the flow rate according to the water level-flow relationship of the corresponding flume.

[0004] In response to the above-mentioned existing technologies, the inventors believe that certain construction errors are inevitable during the excavation and construction of the channel according to the design specifications. As a result, the contraction section of the Parshall flume corresponding to the channel specifications is difficult to effectively fit the closed channel cross-section, making it impossible for the water flow in the channel to flow completely through the Parshall flume. Part of the water flow will flow from the outside, which will cause the measurement data to be unable to accurately reflect the actual flow rate of the channel. Utility Model Content

[0005] In order to solve the above problems, the utility model provides an ultrasonic open channel flowmeter, which can reduce the influence of channel construction errors. The opening of the contraction section can fully fit the inner wall of the channel, and the water flow in the channel is not easy to leak from the outside of the Parshall flume, thereby improving the accuracy of the measurement data and being easy to install and use.

[0006] To achieve the above-mentioned object, the utility model discloses an ultrasonic open channel flowmeter, comprising a Parshall flume, wherein the Parshall flume comprises a contraction section, a throat section, and a divergence section arranged in sequence, wherein the throat section and the divergence section are integrally formed, and the contraction section and the throat section are separately provided and detachably connected;

[0007] The contraction section includes a bottom plate and two movable side plates, the movable side plates include side baffles and a first plug-in plate vertically fixed to the bottom side of the side baffles, and the two side walls of the bottom plate close to the side baffles are provided with first sliding grooves for inserting the first plug-in plate; the side baffles are provided with a connecting piece at one end close to the throat section, and the side baffles are fixedly connected to the throat section through the connecting piece.

[0008] Furthermore, the connecting part includes a connecting plate and a surrounding plate, the connecting plate is fixed to the outer side wall of the side baffle near one end of the throat section, the surrounding plate is fixed to the outer side wall of the opening of the throat section near the contraction section, the connecting plate is fitted with the surrounding plate, and a plurality of waist-shaped holes are opened on the connecting plate, the waist-shaped holes extend in a direction parallel to the bottom plate, and a plurality of waist-shaped holes are arranged in a vertical direction, a screw is passed through each of the waist-shaped holes, one end of the screw is fixed to the surrounding plate, and the other end is threadedly connected to a locking nut.

[0009] Furthermore, a sealing plate is fixed to the bottom side of the bottom plate close to one end of the enclosure plate, and the sealing plate is in contact with the enclosure plate.

[0010] Furthermore, a vertical plate is fixed to the bottom side of the end of the bottom plate away from the throat section, and second sliding grooves are opened on both sides of the vertical plate. The first sliding groove and the second sliding groove are connected. A second plug-in plate is fixed to the end of the first plug-in plate close to the vertical plate, and the second plug-in plate is adapted to the second sliding groove.

[0011] Furthermore, one end of the second sliding groove away from the bottom plate passes through the bottom surface of the vertical plate, and the bottom surface of the second plug plate is flush with the bottom surface of the vertical plate.

[0012] Furthermore, a bracket is fixed to the top end of one of the movable side panels, and an ultrasonic sensor is installed on the bracket.

[0013] Beneficial effects of the utility model:

[0014] The ultrasonic open channel flowmeter of the present invention sets the contraction section independently, and can replace the contraction section according to the actual channel specifications without replacing the Parshall flume as a whole, thereby ensuring the measurement effect while reducing costs; and the contraction section adopts an assembled structure, and the two movable side plates can slide to adjust the distance between the two movable side plates. During installation, the movable side plates can better fit the channel side walls, reducing the measurement impact caused by channel excavation and construction errors, and improving the accuracy of measurement data. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the overall main view of the utility model.

[0016] Figure 2 It is a partial exploded view of the structure of the connecting piece in the present invention.

[0017] Figure 3 It is a structural explosion diagram used to reflect the contraction section in the utility model.

[0018] Figure 4 It is a structural schematic diagram of the bottom plate of the utility model.

[0019] In the figure: 1. Contraction section; 11. Bottom plate; 111. First chute; 112. Second chute; 12. Movable side plate; 121. Side baffle; 122. First plug-in plate; 123. Second plug-in plate; 13. Bracket; 14. Ultrasonic sensor; 15. Vertical plate; 16. Connector; 161. Connecting plate; 162. Waist-shaped hole; 163. Screw; 164. Enclosure; 17. Closing plate; 2. Throat section; 3. Diffusion section. DETAILED DESCRIPTION

[0020] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0021] The utility model discloses an ultrasonic open channel flowmeter.

[0022] Reference Figure 1 and Figure 2 An ultrasonic open channel flowmeter includes a Parshall flume, which comprises a contraction section 1, a throat section 2, and a divergence section 3, arranged in that order. The throat section 2 and the divergence section 3 are integrally formed, while the contraction section 1 and the throat section 2 are separate and detachably connected. By providing a separate contraction section 1, it can be replaced according to the actual channel specifications without having to replace the entire Parshall flume, thus ensuring measurement accuracy while reducing costs.

[0023] Reference Figures 2 to 4 The contraction section 1 includes a bottom plate 11 and two movable side plates 12. A bracket 13 is fixed to the top of one of the movable side plates 12. An ultrasonic sensor 14 is installed on the bracket 13. The ultrasonic sensor 14 detects the water level of the contraction section 1 and then calculates its flow rate. The movable side plate 12 includes a side baffle 121 and a first plug plate 122 fixed vertically to the bottom side of the side baffle 121. The two side walls of the bottom plate 11 near the side baffle 121 are provided with a first slide groove 111 for inserting the first plug plate 122. The side baffle 121 is provided with a connector 16 at one end near the throat section 2. The side baffle 121 is fixedly connected to the throat section 2 via the connector 16. The contraction section 1 adopts an assembled structure, and the two movable side plates 12 can be slid and the distance between the two movable side plates 12 can be adjusted so that the movable side plates 12 can better fit the channel side wall during installation, reducing the measurement impact caused by channel excavation and construction errors.

[0024] Reference Figures 2 to 4The connecting piece 16 includes a connecting plate 161 and a surrounding plate 164. The connecting plate 161 is provided with two, and the two connecting plates 161 are respectively fixed to the outer side wall of the side baffle 121 near one end of the throat section 2; the surrounding plate 164 is U-shaped as a whole, and is fixed to the outer side wall of the opening of the throat section 2 near the contraction section 1; when the contraction section 1 is connected to the throat section 2, the connecting plate 161 fits tightly with the surrounding plate 164, and a number of waist-shaped holes 162 are opened on the connecting plate 161. The waist-shaped holes 162 extend in a direction parallel to the bottom plate 11, and the several waist-shaped holes 162 are arranged in a vertical direction. A screw 163 is passed through each waist-shaped hole 162, one end of the screw 163 is fixed to the surrounding plate 164, and the other end is threadedly connected to a locking nut; and then when the spacing between the two movable side plates 12 is adjusted, the locking nut is tightened to lock the contraction section 1 and the throat section 2. In addition, in order to prevent the problem of water leakage in the Parshall trough due to the appearance of holes at the bottom of the movable side plates 12 when the two movable side plates 12 are adjusted, a sealing plate 17 is fixed to the bottom side of the bottom plate 11 near the end of the enclosure 164. The sealing plate 17 is in contact with the enclosure 164, and the length of the sealing plate 17 needs to be greater than the maximum sliding distance between the two movable side plates 12 near the end of the throat section 2.

[0025] Since the bottom surface of the throat section 2 of the Parshall trough extends downwardly and obliquely away from the contraction section 1, in order to ensure that the water flow of the channel fully flows into the contraction section 1, a vertical plate 15 is fixed to the bottom side of the end of the bottom plate 11 away from the throat section 2, and second chutes 112 are provided on both sides of the vertical plate 15. The first chute 111 and the second chute 112 are connected. A second plug plate 123 is fixed to the end of the first plug plate 122 close to the vertical plate 15, and the second plug plate 123 is adapted to the second chute 112, so that when the two movable side plates 12 are slidably adjusted, the bottom of the contraction section 1 can be guaranteed to block and close the water flow; and the vertical plate 15 also plays a supporting and stabilizing role for the contraction section 1, which is convenient for installation.

[0026] The end of the second chute 112 away from the bottom plate 11 passes through the bottom surface of the vertical plate 15, and the bottom surface of the second plug plate 123 is flush with the bottom surface of the vertical plate 15. Then, when the movable side plate 12 is slid and adjusted, the second plug plate 123 can fit the bottom surface of the channel, preventing water from flowing through the bottom of the contraction section 1, thereby ensuring the measurement accuracy of the device.

[0027] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. An ultrasonic open channel flowmeter, comprising a Parshall flume, wherein the Parshall flume comprises a contraction section (1), a throat section (2) and a diffusion section (3) arranged in sequence, characterized in that: The throat section (2) and the diffuser section (3) are integrally formed, and the contraction section (1) and the throat section (2) are separately provided and the two are detachably connected; The contraction section (1) includes a bottom plate (11) and two movable side plates (12), the movable side plates (12) include a side baffle (121) and a first plug plate (122) vertically fixed to the bottom side of the side baffle (121), and the two side walls of the bottom plate (11) close to the side baffle (121) are provided with a first slide groove (111) for inserting the first plug plate (122); the side baffle (121) is provided with a connecting piece (16) at one end close to the throat section (2), and the side baffle (121) is fixedly connected to the throat section (2) through the connecting piece (16); A vertical plate (15) is fixed to the bottom side of the end of the bottom plate (11) away from the throat section (2), and second sliding grooves (112) are opened on both sides of the vertical plate (15). The first sliding groove (111) and the second sliding groove (112) are connected. A second plugging plate (123) is fixed to the end of the first plugging plate (122) close to the vertical plate (15), and the second plugging plate (123) is adapted to the second sliding groove (112).

2. The ultrasonic open channel flowmeter according to claim 1, characterized in that: The connecting member (16) includes a connecting plate (161) and a surrounding plate (164), wherein the connecting plate (161) is fixed to the outer side wall of the side baffle (121) near one end of the throat section (2), and the surrounding plate (164) is fixed to the outer side wall of the throat section (2) near the opening of the contraction section (1), and the connecting plate (161) is fitted with the surrounding plate (164). A plurality of waist-shaped holes (162) are provided on the connecting plate (161), and the waist-shaped holes (162) extend in a direction parallel to the bottom plate (11). The plurality of waist-shaped holes (162) are arranged in a vertical direction, and a screw rod (163) is passed through each waist-shaped hole (162), one end of the screw rod (163) is fixed to the surrounding plate (164), and the other end is threadedly connected to a locking nut.

3. The ultrasonic open channel flowmeter according to claim 2, characterized in that: A sealing plate (17) is fixed to the bottom side of the bottom plate (11) close to one end of the enclosure plate (164), and the sealing plate (17) is in contact with the enclosure plate (164).

4. The ultrasonic open channel flowmeter according to claim 3, characterized in that: The end of the second sliding groove (112) away from the bottom plate (11) passes through the bottom surface of the vertical plate (15), and the bottom surface of the second plug plate (123) is flush with the bottom surface of the vertical plate (15).

5. An ultrasonic open channel flowmeter according to any one of claims 1 to 4, characterized in that: A bracket (13) is fixed to the top end of one of the movable side panels (12), and an ultrasonic sensor (14) is installed on the bracket (13).

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