CN210833701U - Sensor structure of gas ultrasonic flowmeter - Google Patents

Abstract

The utility model discloses a gaseous ultrasonic flowmeter sensor structure, this design is including casting pipe, clamping ring, O type circle, gaseous ultrasonic transducer, rubber pad, epoxy, probe holder, clamping ring, sealing stopper. The rubber pad and the gas ultrasonic transducer are placed in the probe seat, the bottom of the probe seat is pressed by the pressing ring, and the signal electrode and the grounding electrode of the transducer are led out through the wires. And sleeving an O-shaped ring on the probe seat, putting the probe seat into a mounting hole reserved in the casting guide pipe, pressing the probe seat by using a pressing ring, and screwing a sealing plug. The gas ultrasonic flowmeter has the technical effects of simple structure, convenience in disassembly, easiness in probe replacement, good sealing effect and strong adaptability to field environment, and the precision of the gas ultrasonic flowmeter reaches level 1 after the sensor is adopted.

Description

Sensor structure of gas ultrasonic flowmeter

Technical Field

The utility model relates to a gaseous ultrasonic flowmeter, in particular to gaseous ultrasonic flowmeter's sensor structure.

Background

Gas ultrasonic flow meters are an important industrial instrument. The research of the gas ultrasonic flowmeter in China starts late, and the research and the production of the gas ultrasonic flowmeter are still relatively lagged behind. Although products of various foreign gas ultrasonic flowmeter production companies enter the market of China in a dispute in recent years and the development of domestic ultrasonic flowmeter measurement research is also driven, on the whole, the domestic existing gas ultrasonic flowmeter technology has larger gaps in the aspects of precision, stability, reliability and consistency and international advanced levels. In the domestic market, especially in the high-end application field, the high-precision ultrasonic flowmeter is still under the condition of foreign brands such as Japanese love, German Koron, E + H, Instromet, Flexim, Danie and the like, and the situation that the low-grade product has excess capacity and the high-grade product depends on import is formed. On the other hand, the imported ultrasonic flowmeter has the problems of high price, long ordering period, incapability of being maintained immediately and the like.

The gas ultrasonic flowmeter consists of a sensor and a converter, and signals detected by the sensor are transmitted to the converter for extraction and optimization, so that the gas ultrasonic flowmeter is formed. The sensor is of great importance to improve the accuracy and stability of the gas ultrasonic flowmeter. Therefore, it is important to develop a gas ultrasonic flow meter with high precision and good stability.

Disclosure of Invention

In view of the problems existing in the prior art, the utility model provides a gas ultrasonic flowmeter's sensor structure and mounting method, concrete technical scheme is, a gas ultrasonic flowmeter's sensor structure, including casting pipe, clamping ring, O type circle I, gaseous ultrasonic transducer, rubber pad, O type circle II, epoxy, probe socket, O type circle III, O type circle IV, clamping ring, sealing plug, its characterized in that: the inner cavity of the cast catheter is provided with a mounting hole with symmetrical stepped circular through holes which are communicated with the central hole, and a wire hole which is communicated with the through holes, the probe seat is provided with stepped through holes in the inner cavity, one end of the outer circumferential surface is provided with a boss, the other circumferential surface is provided with a plurality of grooves, through holes are arranged at positions corresponding to the V-shaped grooves of the rubber pad, the rubber pad is two symmetrical V-shaped grooves, one end surface of each V-shaped groove is provided with a circular blind hole, the blind holes are communicated with the circumferential side surface, the rubber pad and the gas ultrasonic transducer are sequentially arranged in the top end of the probe seat, the V-shaped grooves of the rubber pad are aligned to the through holes of the probe seat, a wire of the gas ultrasonic transducer penetrates and is led out of the probe seat, the pressing ring is clamped between the gas ultrasonic transducer and the probe seat, epoxy resin is filled in gaps of the, the two probe bases are integrally and respectively arranged in two mounting holes of a sensor structure comprising a casting guide pipe, a lead of a gas ultrasonic transducer is led out of the casting guide pipe through a lead hole, a pressing ring and the sensor structure comprise casting guide pipes which are tightly matched and pressed on the probe bases, so that the probe bases are fixed in the casting guide pipe, and a sealing plug is fastened on a port of the mounting hole of the casting guide pipe through an O-shaped ring II by using screws.

The technical effect of the utility model is that, the precision is high, stability is good, the location is accurate, simple structure, and it is convenient to dismantle, and it is easy to change the probe, and is sealed effectual, and site environment strong adaptability adopts this sensor after, gaseous ultrasonic flowmeter's precision reaches level 1.

Drawings

FIG. 1 is an isometric view of the profile of the present invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a front view of the rubber pad structure of the present invention;

FIG. 4 is a top view of the rubber pad structure of the present invention;

FIG. 5 is a sectional view of a probe holder according to the present invention.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 to 5, a sensor structure of a gas ultrasonic flowmeter comprises a casting conduit 1, a pressure ring 2, an O-shaped ring I3, a gas ultrasonic transducer 4, a rubber pad 5, an O-shaped ring II 6, epoxy resin 7, a probe seat 8, an O-shaped ring III 9, an O-shaped ring IV 10, a pressing ring 11 and a sealing plug 12, wherein an inner cavity of the casting conduit 1 is provided with a mounting hole 1-1 with a symmetrical stepped circular through hole which is directly communicated with a central hole and a wire hole 1-2 which is communicated with the mounting hole 1-1.

The probe seat 8 is internally provided with a stepped through hole, one end of the outer circumferential surface is provided with a boss, the other circumferential surface is provided with a plurality of grooves, and the through hole 5-3 is arranged at the position corresponding to the V-shaped groove 5-2 of the rubber pad 5.

The rubber pad 5 is provided with a circular blind hole 5-1 in the center of one end face and two symmetrical V-shaped grooves 5-2 which are directly communicated with the blind hole 5-1 from the side face of the circumference.

The rubber pad 5 and the gas ultrasonic transducer 4 are sequentially arranged in the top end of the probe seat 8, the V-shaped groove 5-2 of the rubber pad 5 is aligned with the through hole 5-3 of the probe seat 8, the lead of the gas ultrasonic transducer 4 pierces the rubber pad 5 and is led out of the probe seat 8, the press ring 2 is clamped between the gas ultrasonic transducer 4 and the probe seat 8 to play roles of sealing, cushioning and positioning, the gas ultrasonic transducer 4 can be accurately positioned in the probe seat and installed at a specific position, the rubber pad 5 can be tightly attached to the probe seat 8 by compressing the rubber pad 5, so that the bottom part and the upper part of the probe seat are isolated, meanwhile, the elasticity of the rubber is utilized to prevent the gas ultrasonic transducer 4 from bearing excessive pressure when the press ring is pressed in, the gas ultrasonic transducer 4 is protected from being crushed, and the same air pressure is borne on the upper surface and the lower surface of the gas ultrasonic transducer 4 by the action of the vent hole, the pressure in two opposite directions are mutually acted and counteracted, so that the gas ultrasonic transducer 4 is prevented from bearing pressure for a long time in the use process, the gas ultrasonic transducer 4 is effectively protected from being crushed, the service life of the gas ultrasonic transducer is prolonged to a great extent, epoxy resin 7 is filled in a gap of a stepped through hole of a probe seat 8, an O-shaped ring III 9 and an O-shaped ring IV 10 are respectively sleeved in a groove on the outer circumferential surface of the probe seat 8, the two probe seats 8 are integrally and respectively arranged in two mounting holes 1-1 of a sensor structure comprising a casting conduit 1, a lead of the gas ultrasonic transducer 4 is led out of the casting conduit 1 through lead holes 1-2, the rubber pad 5 is protected from deformation and displacement under the action of the gas pressure by the epoxy resin 7 filled in, and an inner hole of the probe seat 8 filled with the epoxy resin is a stepped hole, so that the resistance is increased, and the, and will not displace under the action of air pressure.

The pressing ring 11 and the sensor structure comprise a casting conduit 1 which is tightly matched and pressed on a probe seat 8, so that the probe seat 8 is fixed in the casting conduit 1, and a sealing plug 12 is fastened on a port of a stepped circular through hole 1-1 of the casting conduit 1 through an O-shaped ring II 6 by using screws.

Claims (1)

1. The utility model provides a sensor structure of gaseous ultrasonic flowmeter, includes casting pipe (1), clamping ring (2), O type circle I (3), gaseous ultrasonic transducer (4), rubber pad (5), O type circle II (6), epoxy (7), probe seat (8), O type circle III (9), O type circle IV (10), clamping ring (11), seals stopper (12), its characterized in that: the inner cavity of the casting catheter (1) is provided with a mounting hole (1-1) with a symmetrical step circular through hole which is communicated with a central hole, a wire guide hole (1-2) communicated with the mounting hole (1-1), the probe seat (8) is provided with a step through hole in the inner cavity, one end of the outer circumferential surface is provided with a boss, the rest of the circumferential surface is provided with a plurality of grooves, a through hole (5-3) is arranged at the position corresponding to the V-shaped groove (5-2) of the rubber pad (5), the rubber pad (5) is provided with a circular blind hole (5-1) at the center of one end surface and two symmetrical V-shaped grooves (5-2) which are provided with the blind hole (5-1) communicated with the circumferential side surface, the rubber pad (5) and the gas ultrasonic transducer (4) are sequentially arranged in the top end of the probe seat (8), and the V-shaped groove (5-2) of the rubber pad (5) is aligned, a lead of a gas ultrasonic transducer (4) pierces a rubber pad (5) and is led out of a probe seat (8), a press ring (2) is clamped between the gas ultrasonic transducer (4) and the probe seat (8), epoxy resin (7) is filled in a gap of a stepped through hole of the probe seat (8), an O-ring III (9) and an O-ring IV (10) are respectively sleeved in a groove on the outer circumferential surface of the probe seat (8), the two probe seats (8) are integrally and respectively arranged in two mounting holes (1-1) of a sensor structure comprising a casting guide pipe (1), the lead of the gas ultrasonic transducer (4) is led out of the casting guide pipe (1) through the lead holes (1-2), a pressing ring (11) and the sensor structure comprise the casting guide pipe (1) which is tightly matched and pressed on the probe seat (8), the probe seat (8) is fixed in the casting guide pipe (1), and a sealing plug (12) is fastened in the mounting hole (1) of the casting guide pipe (1) through an O-ring II (6) by screws 1) On the port.

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