Industrial gas ultrasonic flowmeter

Abstract

The utility model provides an industrial gas ultrasonic flowmeter. The ultrasonic component comprises a base meter pipe section, a flow guide pipe, a honeycomb rectifier, a transducer component, a flange sealing ring, an air outlet end flange end cover, a wiring terminal fastener, a PCB (Printed Circuit Board) adapter plate, a wiring terminal PCB positioning ring, a wiring terminal shell, a wiring terminal fixing nut, a pressure transmitter, a controller sealing gasket, a controller base, a controller and an antenna, the ultrasonic flowmeter is simple in structure, reduces interference of vibration on ultrasonic measurement, improves metering precision, and meanwhile is internally provided with the honeycomb type gas rectifier, so that fluid is transited to a laminar flow state from a turbulent flow state, influences of pulsating flow are eliminated, and therefore the detection effect of the ultrasonic flowmeter on the fluid is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of metrology and testing technology, and more specifically to an industrial gas ultrasonic flow meter. Background Technology

[0002] Ultrasonic gas flow meters, also known as ultrasonic gas flow meters, have one or more pairs of ultrasonic transducers installed on the detection pipe section. These transducers alternately emit and receive ultrasonic waves. Using ultrasonic detection technology, the flow rate and standard flow rate are calculated by detecting the difference in sound velocity along the forward and reverse propagation directions of the ultrasonic waves, as well as the fluid pressure and temperature in the detection pipe section, including the gas molar composition. Ultrasonic measurement of gas flow rate has the following advantages: 1. Ultrasonic flow meters use non-contact measurement technology; there is no direct contact between the sensor and the fluid, reducing maintenance needs due to wear or corrosion, thus lowering maintenance costs. This design also extends the equipment's lifespan, making measurement work more convenient and efficient; 2. During measurement, the ultrasonic flow meter experiences very little resistance to the fluid, and the resulting pressure loss is almost negligible, making it suitable for applications requiring unobstructed fluid flow. However, in practical use, this type of flow meter faces challenges from various interference factors. These interference factors not only affect measurement accuracy but may also damage the stability and reliability of the equipment. Vibrations caused by gas flow inside the pipe or by external pipe vibrations can interfere with the propagation and reception of ultrasonic signals, leading to signal distortion or loss and thus affecting measurement accuracy. Vibration can also cause ultrasonic signals to be reflected and scattered during propagation, increasing the difficulty of signal processing and potentially causing measurement results to deviate from the true value. Summary of the Invention

[0003] The purpose of this invention is to provide an industrial gas ultrasonic flow meter with a vibration damping function for the ultrasonic component. The ultrasonic component is equipped with multiple vibration damping structures, which reduces the interference of vibration on ultrasonic measurement and improves the measurement accuracy. At the same time, the built-in honeycomb gas rectifier allows the fluid to transition from a turbulent state to a laminar state, eliminating the influence of pulsating flow, thereby effectively improving the detection effect of the ultrasonic flow meter on the fluid.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] An industrial gas ultrasonic flow meter, comprising a base pipe section, a guide pipe, a honeycomb rectifier, a transducer assembly, a flange sealing ring, an outlet flange end cover, terminal fasteners, a PCB adapter board, a terminal PCB positioning ring, a terminal housing, a terminal fixing nut, a pressure transmitter, a controller gasket, a controller base, a controller, and an antenna, is characterized by:

[0006] The guide pipe is slightly smaller in diameter than the base pipe section, and the guide pipe is placed inside the base pipe section and positioned by the positioning pin provided on the flange.

[0007] The outlet flange end cover is threadedly connected to the outlet flange, and a flange sealing ring is provided between the two.

[0008] The air inlet end of the guide pipe is equipped with the honeycomb rectifier;

[0009] The guide pipe is provided with transducer assembly mounting holes;

[0010] The transducer assembly is fitted into the mounting hole of the guide tube;

[0011] The PCB adapter board is fitted with the PCB positioning ring for the wiring terminals;

[0012] The PCB adapter board is placed on the terminal fastener;

[0013] The terminal fastener is threadedly connected to the terminal housing.

[0014] The terminal fixing nut is threadedly connected to the terminal housing.

[0015] The pressure transmitter is connected to the base gauge pipe section via a thread;

[0016] The controller base and the base tube section are fastened with screws, and a controller sealing gasket is provided between them.

[0017] The controller is threadedly connected to the controller base;

[0018] The controller is equipped with an antenna for receiving / transmitting data;

[0019] Furthermore, the transducer assembly includes an ultrasonic transducer, a transducer positioning sleeve, a shock-absorbing sealing gasket, a transducer sleeve, a shock-absorbing pad, and a stainless steel pressure plate, characterized in that:

[0020] The ultrasonic transducer is provided with a transducer positioning sleeve;

[0021] The ultrasonic transducer is assembled with the positioning sleeve and then placed inside the transducer sleeve.

[0022] The ultrasonic transducer sleeve is provided with shock-absorbing pads and shock-absorbing sealing pads above and below;

[0023] The stainless steel pressure plate assembles the assembled transducer onto the guide pipe.

[0024] The beneficial effects of this utility model are:

[0025] This utility model of an industrial gas ultrasonic flow meter features multiple vibration damping structures on the ultrasonic component, reducing the interference of vibration on ultrasonic measurement and improving measurement accuracy.

[0026] This utility model of an industrial gas ultrasonic flow meter incorporates a built-in honeycomb gas rectifier, which transitions the fluid from a turbulent state to a laminar state, eliminating the influence of pulsating flow and thus effectively improving the ultrasonic flow meter's detection performance. Attached Figure Description

[0027] Appendix Figure 1 This is a schematic diagram of the structure of the industrial gas ultrasonic flow meter of this utility model.

[0028] Appendix Figure 2 This is a schematic diagram of the transducer assembly structure of the industrial ultrasonic flow meter of this utility model. Detailed Implementation

[0029] The technical solution of this utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0030] As attached Figure 1 As shown: Industrial gas ultrasonic flow meter, including base pipe section (10), guide pipe (12), honeycomb rectifier (11), transducer assembly (13), flange sealing ring (14), outlet flange end cover (15), wiring terminal fastener (9), PCB adapter board, wiring terminal PCB positioning ring (8), wiring terminal housing (7), wiring terminal fixing nut (6), pressure transmitter (5), controller sealing gasket (4), controller base (3), controller (2), antenna (1).

[0031] The guide pipe is slightly smaller in diameter than the base meter pipe section. The guide pipe is placed inside the base meter pipe section. Specifically, the inlet and outlet ends of the base meter pipe section are pre-welded with flanges. The guide pipe is inserted into the positioning step of the inlet flange of the base meter from the outlet end. The flange end cap is threadedly connected to the outlet flange to press the guide pipe.

[0032] The air inlet end of the guide pipe is provided with the honeycomb rectifier. Specifically, the air inlet end of the guide pipe is provided with a positioning step, and the honeycomb rectifier is inserted from the air inlet end of the guide pipe and locked into the positioning step of the guide pipe.

[0033] The guide tube is provided with transducer assembly mounting holes, and the transducer assembly is assembled into the mounting holes of the guide tube. This utility model has 8 transducer assembly mounting holes.

[0034] To isolate the tested medium from the external environment, this utility model is equipped with a PCB adapter board. The PCB adapter board is fitted with a PCB positioning ring for the terminal block, which is placed inside the terminal block fastener. The terminal block housing is connected by threads. The terminal block fixing nut is connected to the upper end of the terminal block housing by threads.

[0035] The pressure transmitter is connected to the base gauge pipe section via a thread and is used to detect the gas pressure in the pipe section.

[0036] The controller base and the base pipe section are connected by screws, and a controller sealing gasket is provided between them to ensure sealing performance. The controller is threadedly connected to the controller base.

[0037] The controller is equipped with an antenna for receiving / transmitting data. The antenna has a self-sealing structure and is screwed onto the housing interface by threads.

[0038] As attached Figure 2 As shown: The transducer assembly includes an ultrasonic transducer (16), a transducer positioning sleeve (17), a shock-absorbing sealing gasket (18), a transducer sleeve (19), a shock-absorbing pad (20), and a stainless steel pressure plate (21). The transducer positioning sleeve is fitted onto the ultrasonic transducer and placed inside the transducer sleeve. The shock-absorbing sealing gasket and the shock-absorbing pad are fitted below and above the transducer sleeve. The shock-absorbing sealing gasket is mainly used for shock absorption between the transducer and the guide pipe. The shock-absorbing pad is used to press the entire transducer assembly. The stainless steel pressure plate assembles the assembled transducer assembly onto the guide pipe. This industrial gas ultrasonic flow meter is equipped with 4 sets of transducer assemblies.

[0039] The assembly process of this utility model is as follows:

[0040] Step 1: First, assemble the transducer assembly. After the transducer positioning sleeve is placed on the ultrasonic transducer, it is placed inside the transducer sleeve. Shock-absorbing sealing gaskets and shock-absorbing pads are placed below and above the transducer sleeve. The stainless steel pressure plate fixes the assembled transducer assembly to the inner guide tube with screws.

[0041] Step 2: Insert the honeycomb rectifier into the air inlet end of the guide tube and lock it into the designated step of the guide tube.

[0042] Step 3: Insert the guide tube from the outlet end into the positioning step of the base gauge inlet flange, connect the flange end cover to the outlet flange with threads, and tighten the guide tube.

[0043] Step 4: The pressure transmitter and the base gauge pipe section are connected by threads. The PCB adapter board is fitted with a PCB positioning ring for the terminal block, which is placed inside the terminal block fastener and sealed with potting compound. The terminal block housing is connected by threads. The terminal block fixing nut is connected to the upper end of the terminal block housing by threads.

[0044] Step 5: The controller base and the base meter pipe section are connected by screws, and a controller sealing gasket is provided in the middle.

[0045] Step 6: Connect the controller to the controller base via threads.

Claims

1. An industrial gas ultrasonic flow meter, comprising a base pipe section, a guide pipe, a honeycomb rectifier, a transducer assembly, a flange sealing ring, an outlet flange end cover, terminal fasteners, a PCB adapter board, a terminal PCB positioning ring, a terminal housing, a terminal fixing nut, a pressure transmitter, a controller gasket, a controller base, a controller, and an antenna, characterized in that: The guide pipe is slightly smaller in diameter than the base pipe section, and the guide pipe is placed inside the base pipe section and positioned by the positioning pin provided on the flange. The outlet flange end cover is threadedly connected to the outlet flange, and a flange sealing ring is provided between the two. The air inlet end of the guide pipe is equipped with the honeycomb rectifier; The guide pipe is provided with transducer assembly mounting holes; The transducer assembly is fitted into the mounting hole of the guide tube; The PCB adapter board is fitted with the PCB positioning ring for the wiring terminals; The PCB adapter board is placed on the terminal fastener; The terminal fastener is threadedly connected to the terminal housing. The terminal fixing nut is threadedly connected to the terminal housing. The pressure transmitter is connected to the base gauge pipe section via a thread; The controller base and the base tube section are fastened with screws, and a controller sealing gasket is provided between them. The controller is threadedly connected to the controller base; The controller is equipped with an antenna for receiving / transmitting data.

2. The industrial gas ultrasonic flow meter according to claim 1, characterized in that: The transducer assembly includes an ultrasonic transducer, a transducer positioning sleeve, a shock-absorbing sealing gasket, a transducer sleeve, a shock-absorbing pad, and a stainless steel pressure plate. The ultrasonic transducer is provided with a transducer positioning sleeve; The ultrasonic transducer is assembled with the transducer positioning sleeve and then placed inside the transducer sleeve. The ultrasonic transducer sleeve is provided with shock-absorbing pads and shock-absorbing sealing pads above and below; The stainless steel pressure plate assembles the assembled transducer onto the guide pipe.

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