Immersion type ultrasonic flowmeter with electronic measuring unit capable of being replaced on site and use method

Abstract

The invention belongs to the technical field of ultrasonic flow meters, and discloses an immersion type ultrasonic flow meter with an electronic measuring unit capable of being replaced on site and a using method.The immersion type ultrasonic flow meter comprises a machine room and a base, the bottom of the machine room is connected with two vertical feeler levers, the two feeler levers are equal in length, and sensor probes are installed at the bottom ends of the feeler levers; the base comprises a pipe attaching piece, two vertical rod inlet pipes are arranged above the pipe attaching piece, and the two rod inlet pipes correspond to the two feeler levers. The device is simple and reasonable in structure, the base is installed on a pipeline, the two probe rods simultaneously carry the probe to be inserted into the pipeline through the rod inlet pipe to be reinforced, then the electronic measuring unit can be installed, and the electronic measuring unit is convenient to disassemble and replace on site.

Description

Technical Field

[0001] The invention belongs to the technical field of time-difference ultrasonic flowmeters, and in particular relates to an immersion ultrasonic flowmeter with an electronic measuring unit replaceable on site and a use method thereof. Background Art

[0002] The propagation time difference method ultrasonic flow meter is based on the fact that when ultrasonic waves propagate in the fluid, there is a difference in the propagation speed in the downstream direction and the upstream direction. By measuring this time difference, the flow velocity of the fluid is calculated, and then the fluid flow rate is obtained.

[0003] The commonly used insertion ultrasonic flow meter realizes measurement through two independently installed immersion probes on the pipe. Since the probes are installed separately, it is not convenient for on-site installation and maintenance. In addition, independent installation may cause inconsistencies in the angles and depths of the two probes, affecting the measurement accuracy. Summary of the invention

[0004] In order to overcome the above technical problems, the present invention provides an immersion ultrasonic flowmeter with an on-site replaceable electronic measuring unit and a method of using the same.

[0005] The present invention adopts the following technical solutions: An immersion ultrasonic flowmeter with a field-replaceable electronic measuring unit comprises a machine room and a base, wherein two vertical probe rods are connected to the bottom of the machine room, the two probe rods are of equal length, and sensor probes are installed at the bottom ends of the probe rods; the base comprises a tube-sticking sheet, and two vertical rod-inlet pipes are arranged above the tube-sticking sheet, and the two rod-inlet pipes correspond to the two probe rods.

[0006] Preferably, an external thread is provided at the top of the rod feed tube, a circle of compression ring is fixedly connected to the outer periphery of the probe rod, a fastening nut is sleeved on the compression ring of the probe rod, and when the fastening nut is tightened on the external thread, the compression ring is pressed against the edge of the rod feed tube.

[0007] Preferably, the bottom end of the probe rod is in the shape of an inclined surface, the inclined surface faces inward and the two inclined surfaces are symmetrical, and the sensor probe is embedded in the inclined surface and the two sensor probes are symmetrical.

[0008] Preferably, the angle between the inclined surface at the bottom end of the probe rod and the horizontal plane is 25-80°.

[0009] Preferably, the diameter of the probe rod is 10 mm to 30 mm, and the center distance between the two probe rods is 40 mm to 150 mm.

[0010] Preferably, a sealing ring is placed between the pressure ring and the rod inlet tube.

[0011] Preferably, the cabin is equipped with a circuit board, a display and a communication interface.

[0012] How to use the immersion ultrasonic flow meter: S1. First attach the pipe sheet to the outer wall of the pipe and fix it by welding, gluing, etc.; S2. Drill a through hole in the tube wall surrounded by the rod-entering tube; S3. Hold the machine room and insert the probe into the pipeline through the rod inlet pipe, then tighten the fastening nut to the external thread, press the pressure ring, and seal the sealing ring between the pressure ring and the rod inlet pipe; S4. During measurement, under the control of the circuit board, an ultrasonic signal is emitted by one probe, reflected by the opposite pipe wall to another probe, and then reversed once. Two reflections in the forward and reverse directions are used to complete a measurement. The specific flow rate and flow calculation principle will not be described in detail. S5. When repairing or replacing electronic components, reverse the fastening nut and then pull it out to remove the electronic measuring unit.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention arranges two probe rods at the bottom of the cabin, and a sensor probe is arranged at the bottom of the probe rod. The base is installed on the pipeline. The two probe rods carry the probes at the same time and are inserted into the pipeline through the rod inlet pipe and then reinforced to complete the installation of the electronic measurement unit, which is convenient for on-site disassembly and replacement of the electronic measurement unit. 2. In the present invention, the errors in angle, depth, etc. of the two sensor probes after entering the pipe are small, thus ensuring the measurement accuracy of the flow meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall installation state of the present invention; Figure 2 It is a longitudinal cross-sectional schematic diagram of the present invention; Figure 3 yes Figure 2 Enlarged schematic diagram at point A in the middle.

[0015] Description of reference numerals: 1. Cabin; 2. Fastening nut; 3. Probe rod; 4. Sealing ring; 5. External thread; 6. Rod inlet pipe; 7. Pipe segment; 8. Sensor probe; 9. Compression ring. DETAILED DESCRIPTION

[0016] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. Unless otherwise specified, the raw materials and equipment used can be purchased from the market or are commonly used in the art. The methods in the embodiments are conventional methods in the art unless otherwise specified. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0017] An immersion ultrasonic flowmeter with a field replaceable electronic measuring unit comprises a machine room 1 and a base, wherein a test circuit board is arranged inside the machine room 1, and the outer shell has a display and a communication interface, and two vertical probe rods 3 are connected to the bottom of the machine room 1, the two probe rods 3 are of equal length, the diameter of the probe rods 3 is 10 mm to 30 mm, the center distance between the two probe rods 3 is 40 mm to 150 mm, a sensor probe 8 is installed at the bottom end of the probe rod 3, and the two sensor probes 8 are connected to the test circuit board, the bottom end of the probe rod 3 is in the shape of an inclined plane, and the angle between the inclined plane and the horizontal plane is 25 to 80 degrees, which is determined according to the pipe diameter of the pipeline, the inclined plane faces inward and the two inclined planes are symmetrical, the sensor probe 8 is embedded in the inclined plane and the two sensor probes 8 are symmetrical; the base comprises a pipe pasting sheet 7, and two vertical rod inlet pipes 6 are arranged above the pipe pasting sheet 7, and the two rod inlet pipes 6 correspond to the two probe rods 3. An external thread 5 is provided at the top end of the rod feed pipe 6, a circle of compression ring 9 is fixedly connected to the outer periphery of the probe rod 3, a fastening nut 2 is sleeved on the compression ring 9 of the probe rod 3, and when the fastening nut 2 is tightened on the external thread 5, the compression ring 9 is pressed against the edge of the rod feed pipe 6, and a sealing ring 4 is placed between the compression ring 9 and the rod feed pipe 6 to enhance the sealing.

[0018] How to use the immersion ultrasonic flow meter with field replaceable electronic measuring unit: S1. First attach the pipe sheet 7 to the outer wall of the pipe, which can be fixed by welding, gluing, etc.; S2. Drill a through hole in the pipe wall of the pipe encircled by the feed rod pipe 6, the through hole having the same inner diameter as the feed rod pipe 6; S3. Hold the machine room 1 and insert the probe rod 3 into the pipeline through the rod inlet pipe 6. The outer diameter of the probe rod 3 is equal to the inner diameter of the rod inlet pipe 6 and fits tightly. Then tighten the fastening nut 2 to the external thread 5, press the pressure ring 9 tightly, and seal the sealing ring 4 between the pressure ring 9 and the rod inlet pipe 6. S4. During measurement, under the control of the circuit board, an ultrasonic signal is emitted by one probe, reflected by the opposite pipe wall to another probe, and then reversed once. Two reflections in the forward and reverse directions are used to complete a measurement. The specific flow rate and flow calculation principle will not be described in detail. S5. When repairing or replacing electronic components, reversely screw the fastening nut 2 and then pull it outward to remove the electronic measuring unit.

[0019] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the above embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An immersion ultrasonic flow meter with a field replaceable electronic measuring unit, comprising a housing and a base, characterized in that: The bottom of the cabin is connected to two vertical probe rods, and the bottom ends of the probe rods are installed with sensor probes; the base includes a tube sticking sheet, and two vertical rod feed pipes are arranged above the tube sticking sheet, and the two rod feed pipes correspond to the two probe rods.

2. The immersion ultrasonic flowmeter with field replaceable electronic measuring unit according to claim 1, characterized in that: The top of the rod-inlet pipe is provided with an external thread, the outer periphery of the probe rod is fixedly connected with a circle of compression ring, and the probe rod is sleeved with a fastening nut above the compression ring. When the fastening nut is tightened on the external thread, the compression ring is pressed against the edge of the rod-inlet pipe.

3. The immersion ultrasonic flowmeter with field replaceable electronic measuring unit according to claim 2, characterized in that: The bottom end of the probe rod is in the shape of an inclined surface, the inclined surface faces inward and the two inclined surfaces are symmetrical, and the sensor probe is embedded in the inclined surface and the two sensor probes are symmetrical.

4. The immersion ultrasonic flowmeter with field replaceable electronic measuring unit according to claim 3, characterized in that: The angle between the inclined surface at the bottom end of the probe rod and the horizontal plane is 25-80°.

5. The immersion ultrasonic flowmeter with field replaceable electronic measuring unit according to claim 4, characterized in that: The diameter of the probe rod is 10mm-30mm, and the center distance between the two probe rods is 40mm-150mm.

6. The immersion ultrasonic flowmeter with field replaceable electronic measuring unit according to claim 2, characterized in that: A sealing ring is placed between the pressure ring and the rod inlet pipe.

7. The immersion ultrasonic flow meter with field replaceable electronic measuring unit according to claim 1, characterized in that: The machine compartment is equipped with a circuit board, a display and a communication interface.

8. The method for using an immersion ultrasonic flow meter is characterized in that: The immersion ultrasonic flowmeter according to claim 3 comprises the following: S1. Attach the pipe sheet to the outer wall of the pipe and fix it by welding, gluing, etc.; S2. Drill a through hole in the tube wall surrounded by the rod-entering tube; S3. Hold the machine room and insert the two probes into the pipeline through the two rod inlet pipes, then tighten the fastening nuts on the external threads, press the pressure ring, and seal the sealing ring between the pressure ring and the rod inlet pipe; S4. During measurement, the ultrasonic signal is emitted by one probe, reflected by the opposite pipe wall to the other probe, and then reflected in the opposite direction once. Two reflections in the positive and negative directions are used to complete one measurement; S5. When repairing or replacing electronic components, reverse the fastening nut and then pull it out to remove the electronic measuring unit.

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