CN201344807Y

CN201344807Y - Vortex flowmeter capable of replacing probe without stopping flow

Info

Publication number: CN201344807Y
Application number: CNU2009200019089U
Authority: CN
Inventors: 张玉芬; 谭立新; 王俊
Original assignee: WEIFANG AOBO INSTRUMENTATION TECHNOLOGY DEVELOPMENT Co Ltd
Current assignee: WEIFANG AOBO INSTRUMENTATION TECHNOLOGY DEVELOPMENT Co Ltd
Priority date: 2009-01-01
Filing date: 2009-01-01
Publication date: 2009-11-11
Anticipated expiration: 2019-01-01

Abstract

The utility model relates to a vortex flowmeter capable of replacing probe without stopping flow, which comprises a detection tube body, a radiating fixed seat, a connecting rod, a stress conduction rod, a sensor probe and a flow detecting instrument. The utility model is characterized in that a detection hole is disposed on the outer wall of the detection tube body, the stress conduction rod is installed on the detection hole of the detection tube body, one end of the stress conduction rod passing through the detection hole is inserted into a pipeline of the detection tube body, and the other end of the stress conduction rod is equipped with an inserting groove which is connected with the flat end of the sensor probe. The sensor probe is installed outside the detection tube body and does not directly contact with detected flow, thereby enabling applicable flow temperature of the novel vortex flowmeter to be increased from 320 DEG C to 450 DEG C or even higher, resolving the technical problem that a common stress vertex flowmeter can not detect high steam, greatly prolonging the service life of the probe without stopping flow in need of replacing the probe. The utility model has the advantages of simple structure, convenient installation and maintenance, low costs, high accuracy and substantial characteristics and achievement.

Description

Continue to flow and change the vortex shedding flow meter of probe

Technical field

The utility model relates to a kind of flowmeter, specifically a kind of vortex shedding flow meter.

Background technology

At present, the general stress-type vortex street flowmeter of Shi Yonging, generally be that detection probe with sensor directly is inserted in the measuring tube, directly contact with the detected fluid medium, because the maximum operation (service) temperature of detection probe, be subjected to its inner piezoelectric element, the temperature of conducting resinl and encapsulating material, elasticity and the isoparametric restriction of expanded by heating coefficient, therefore, it is suitable for the highest fluid temperature (F.T.) is about 300 ℃, can not be used for the detection of high-temperature steam more than 300 ℃, when mordant fluid is measured, easy corrosion probe, shortened the serviceable life of sensor greatly, increased the cost that detects to a certain extent, and when changing probe, need stop the supple of gas or steam, arrhea, thereby whole production can not be carried out, cause a large amount of losses, be unfavorable for the popularization and the use of flowmeter.

Summary of the invention

The purpose of this utility model provides a kind of continuing to flow and changes the vortex shedding flow meter of probe, with detection that solves high-temperature steam and the problem that continues to flow the replacing probe.

For achieving the above object, the utility model is by the following technical solutions:

The vortex shedding flow meter of changing probe that continues to flow described in the utility model comprises the detection body, be installed in the eddy generator in the detector tube intracoelomic cavity, be installed in the radiating permanent seat that detects on the tube wall, be installed in the connecting pipe on the radiating permanent seat, be inserted into the sensor probe in the connecting pipe, described sensor probe is rod shaped structure, its top is smoothly transitted into flat by right cylinder, the end of sensor probe is electrically connected with flow instrumentation by lead, it is characterized in that: on the detection body tube wall of radiating permanent seat inside, be fitted with the stress conductive bar, this stress conductive bar is cylindric, the top of stress conductive bar is the wedge structure that is smoothly transitted into flat by right cylinder, the end of stress conductive bar has an inserting groove, the shape of this inserting groove and size match with the top of sensor probe, and the top of sensor probe is inserted in this inserting groove; Have sealing pad at the waist on the stress conductive bar, between wedge structure and the inserting groove, the sealing dish is installed on the tube wall that detects body, is provided with O-ring seal between the tube wall of sealing pad and detection body.

The top of described sensor probe is embedded with a stress steel ball, this stress steel ball closely contacts with the grafting cell wall of stress conductive bar, the top and the inserting groove of sensor probe are fixed by fixing sleeve, and the waist of sensor probe also is provided with shaft collar, and this shaft collar is installed on the radiating permanent seat.

Change the vortex shedding flow meter of probe owing to adopted described the continuing to flow of technique scheme, place the stress conductive bar that detects in the body by increasing by one, make sensor probe place detector tube external, avoid probe directly to contact with the institute test fluid, thereby make the suitable fluid temperature (F.T.) of this novel vortex street flowmeter bring up to 450 ℃ even higher by 320 ℃, solved the technical barrier that general stress-type vortex street flowmeter can not detect high-temperature steam, prolonged the serviceable life of probe greatly, and when needs are changed probe, do not need to stop the supple of gas or steam, arrhea, all working carries out as usual, and simple in structure, installs, easy to maintenance, cost is low, range ratio is big, and the precision height has substantial characteristics and progress.

Taken into full account the convenience of common vortex shedding flow meter being implemented transformation in this utility model vortex shedding flow meter design; Common vortex shedding flow meter main body is not made the vortex shedding flow meter that any machining can repack the replacing probe that continues to flow into.

Description of drawings

Fig. 1 is the structural representation of a kind of embodiment of the utility model;

Fig. 2 is the structural representation of stress conductive bar among Fig. 1;

Fig. 3 is the left view of Fig. 2;

Fig. 4 is the structural representation of sensor probe among Fig. 1;

Fig. 5 is the left view of Fig. 4;

Fig. 6 is the structural representation of eddy generator among Fig. 1.

Embodiment

The utility model will be further described below in conjunction with the drawings and specific embodiments.

As shown in Figure 1, the vortex shedding flow meter of changing probe that continues to flow described in the utility model detects body 1, is installed in the eddy generator 9 that detects in body 1 inner chamber, is installed in the stress conductive bar 31 that detects on the body 1, is installed in the radiating permanent seat 2 that detects on body 1 outer wall, is installed in connecting pipe 4 on the radiating permanent seat 2, is inserted into the sensor probe 6 in the stress conductive bar 31.

The outer wall that detects body 1 is provided with and detects the hole, and radiating permanent seat 2 is installed on detection body 1 outer wall that detects the place, hole.As Fig. 4, shown in Figure 5.

Described sensor probe 6 is rod shaped structure, and its top is smoothly transitted into flat by right cylinder, and the end of sensor probe 6 is electrically connected with flow instrumentation 5 by lead.

On detection body 1 tube wall of radiating permanent seat 2 inside, be fitted with stress conductive bar 31, as Fig. 2, shown in Figure 3, this stress conductive bar 31 is cylindric, the top of stress conductive bar 31 is the wedge structures 33 that are smoothly transitted into flat by right cylinder, extend to detect in body 1 inner chamber, the back of eddy generator 9.The end of stress conductive bar 31 has an inserting groove 34, and the geomery of this inserting groove 34 matches with the top of sensor probe 6, and the top of sensor probe 6 is inserted in this inserting groove 34; Have sealing pad 32 at the waist on the stress conductive bar 31, between wedge structure 33 and the inserting groove 34, sealing dish 32 is installed on the tube wall that detects body 1, be provided with O-ring seal 7 between the tube wall of sealing pad 32 and detection body 1, the sealing of the pipeline that maintenance is detected.

Described sensor probe 6 is the flat top one stress steel ball 61 is installed, stress steel ball 61 closely contacts with inserting groove 34 walls of stress conductive bar 31, the top of sensor probe 6 and inserting groove 34 are fixing by fixing sleeve 8, also be provided with shaft collar 62 on the sensor probe 6, shaft collar 62 is installed on the holder 2, can prevent that like this sensor 6 from rocking, thereby avoid sensor 6 to cause the inaccurate of testing result because of rocking.

At the top of sensor probe 6 erection stress steel ball 61 is for stress conductive bar 31 is closely contacted with sensor probe 6, improves the conductive performance of power, can improve the sensitivity of detection like this, and good reproducibility, is convenient to work steady in a long-term.The other end of sensor probe 6 is connected with lead, and the centre of sensor probe 6 is provided with shaft collar 62, and shaft collar 62 matches with the groove of holder 2.

Between described detection body 1 and the holder 2, be screw between holder 2 and the connecting link 4 and be connected, be easy for installation and removal, and change or maintenance, also can very easily common vortex shedding flow meter being adapted as simultaneously continues to flow changes the vortex shedding flow meter of probe.

Principle of work: detect the fluid in the body 1, produce whirlpool through eddy generator 9, whirlpool counter stress conductive bar 31 stretches into and detects body 1 ducted part, produce stress, pass in the sensor probe 6 that is connected with stress conductive bar 31 by stress conductive bar 31, change force signal into electric signal by the piezoelectric element in the sensor probe 6, and this electric signal is passed in the measuring instrument 5, handle the back and show.

When needs more during the probe of emat sensor 6, only need fixing sleeve 8 is unclamped, extracting sensor 6 is changed and get final product and since stress conductive bar 31 with detect body 1 and also be in sealing state, so the replacing process does not need whole pipe to stop, and does not influence normal work.

Claims

1, continue to flow and change the vortex shedding flow meter of probe, comprise and detect body (1), be installed in the eddy generator (9) that detects in body (1) inner chamber, be installed in the radiating permanent seat (2) that detects on body (1) outer wall, be installed in the connecting pipe (4) on the radiating permanent seat (2), be inserted into the sensor probe (6) in the connecting pipe (4), described sensor probe (6) is rod shaped structure, its top is smoothly transitted into flat by right cylinder, the end of sensor probe (6) is electrically connected with flow instrumentation (5) by lead, it is characterized in that: on inner detection body (1) tube wall of radiating permanent seat (2), be fitted with stress conductive bar (31), this stress conductive bar (31) is cylindric, the top of stress conductive bar (31) is the wedge structure (33) that is smoothly transitted into flat by right cylinder, the end of stress conductive bar (31) has an inserting groove (34), shape of this inserting groove (34) and size match with the top of sensor probe (6), and the top of sensor probe (6) is inserted in this inserting groove (34); Go up in stress conductive bar (31), the waist between wedge structure (33) and the inserting groove (34) has sealing pad (32), sealing dish (32) is installed on the tube wall that detects body (1), is provided with O-ring seal (7) between the tube wall of sealing pad (32) and detection body (1).

2, according to claim 1 continuing to flow changed the vortex shedding flow meter of probe, it is characterized in that: the top of described sensor probe (6) is embedded with a stress steel ball (61), this stress steel ball (61) closely contacts with inserting groove (34) wall of stress conductive bar (31), the top of sensor probe (6) and inserting groove (34) are fixing by fixing sleeve (8), the waist of sensor probe (6) also is provided with shaft collar (62), and this shaft collar (62) is installed on the radiating permanent seat (2).