CN201255643Y

CN201255643Y - Novel equalizing speed flowmeter

Info

Publication number: CN201255643Y
Application number: CNU2008200999379U
Authority: CN
Inventors: 王进; 胡海
Original assignee: CHONGQING WEIBA INSTRUMENT CO LTD
Current assignee: CHONGQING WEIBA INSTRUMENT CO LTD
Priority date: 2008-09-09
Filing date: 2008-09-09
Publication date: 2009-06-10
Anticipated expiration: 2018-09-09

Abstract

The utility model discloses a novel average speed pipe flow meter which comprises a probe and a pressure connector; the probe is provided with a sealing plate; the sealing plate divides the probe into a low pressure cavity and a high pressure cavity which are sealed and insulated from each other; the low pressure cavity is provided with low pressure cavity pressure holes; the high pressure cavity is provided with a high pressure cavity pressure hole; the probe is integrated with the sealing plate; the novel average speed pipe flow meter can prevent the leakage between the high pressure cavity and the low pressure cavity, ensure the measuring precision of the flow meter, prolong the service life and reduce the repairing and maintenance cost; the low pressure cavity pressure holes are arranged on both side surfaces, which prevents impurities in fluid from blocking the low pressure cavity pressure holes because of vortex street force and impacting the normal work of the flow meter, prevents impact of vortex, so that the low pressure signal is stabler and more accurate; the pressure connector is an integrated structure, is convenient to be replaced and repaired, prevents leakage, has compact and stable structure, reduces connecting points of instruments and the probability of pressure leakage.

Description

Novel mean velocity tube flowmeter

Technical field

The utility model relates to a kind of differential pressure flowmeter, particularly a kind of novel mean velocity tube flowmeter.

Background technology

Differential pressure flowmeter is to measure fluid flow a kind of flowmeter relatively more commonly used, and mean velocity tube flowmeter is exactly a kind of differential pressure flowmeter that utilizes the pressure reduction principle to measure.Mean velocity tube flowmeter comprises probe and impulse joint, comprise in the probe that seal isolation also is provided with the high pressure chest and the low-pressure cavity of tracting pressuring hole respectively, during use, high pressure chest is preceding being met to fluid, low-pressure cavity after, obtain the pressure reduction of high pressure chest and low-pressure cavity by tracting pressuring hole separately, extrapolate flow rate of fluid according to pressure reduction, thereby obtain flow.

In the prior art, the even speed tube flow probe all adopts the three-chip type welded structure, carry out seal isolation by fixedly installing baffle structure between high pressure chest and the low-pressure cavity, thereby structure is stable inadequately, exist high pressure chest to arrive the possibility of low-pressure cavity seepage, thereby make final testing result inaccurate, and influence the serviceable life of flowmeter; And, in the prior art, the tracting pressuring hole of low-pressure cavity all is opened in the low-pressure cavity rear side, in process fluid flow, can form eddy current at the low-pressure cavity rear side rear side of just popping one's head in, make the foreign material in the fluid concentrate on rear side easily, simultaneously, under the effect of vortex street power, foreign material can block the low-pressure cavity tracting pressuring hole, influence the operate as normal of flowmeter; Existing flowmeter impulse joint adopts pipeline directly to weld or other modes connect, and it is inconvenient to change maintenance, causes leakage easily, and structure is also unstable.

Therefore, need a kind of mean velocity tube flowmeter, avoid the seepage between high pressure chest and the low-pressure cavity, the measuring accuracy of dependable flow meter increases the service life, and reduces maintenance and maintenance cost.

The utility model content

In view of this, the purpose of this utility model provides a kind of novel mean velocity tube flowmeter, can avoid the seepage between high pressure chest and the low-pressure cavity, and the measuring accuracy of dependable flow meter increases the service life, and reduces maintenance and maintenance cost; Simultaneously, avoid the interior foreign material of fluid that the low-pressure cavity tracting pressuring hole is blocked, eliminate its influence the flowmeter operate as normal.

Novel mean velocity tube flowmeter of the present utility model, comprise probe and impulse joint, in the described probe seal pad is set, the low-pressure cavity and the high pressure chest that will be divided into isolation sealed to each other in seal pad will be popped one's head in, described low-pressure cavity is provided with the low-pressure cavity tracting pressuring hole, high pressure chest is provided with the high pressure chest tracting pressuring hole, and described probe and seal pad are wholely set.

Further, described low-pressure cavity tracting pressuring hole is arranged on the two sides of low-pressure cavity;

Further, described impulse joint is provided with high-pressure channel and low-pressure channel for being wholely set in the joint, and described high pressure chest links to each other by the high-pressure outlet of high-pressure channel with the impulse joint, and described low-pressure cavity links to each other by the low tension outlet of low-pressure channel with the impulse joint;

Further, described high pressure chest tracting pressuring hole is arranged on the front side;

Further, described high pressure chest tracting pressuring hole and low-pressure cavity tracting pressuring hole are more than one and vertically arrange;

Further, the xsect front side of probe is a warhead form;

Further, the front side surface of probe mill bulk processing.

The beneficial effects of the utility model are: novel mean velocity tube flowmeter of the present utility model, probe adopts the one-off drawing moulding process to be set to one, can avoid the seepage between high pressure chest and the low-pressure cavity, the measuring accuracy of dependable flow meter, increase the service life, reduce maintenance and maintenance cost; The low-pressure cavity tracting pressuring hole is arranged on two sides, avoids eliminating its influence to the flowmeter operate as normal because vortex street power makes the interior foreign material of fluid that the low-pressure cavity tracting pressuring hole is blocked, and also avoids being subjected to vortes interference, makes low-voltage signal more stable, and is more accurate; The impulse joint adopts integrative-structure, and it is convenient to change maintenance, stops a leak, and compact conformation is stable, has reduced the instrument tie point, has also just reduced the probability of pressure leakage.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further described.

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

Fig. 2 be Fig. 1 along A-A to cutaway view Amplified image.

Embodiment

Fig. 1 is a structural representation of the present utility model, Fig. 2 be Fig. 1 along A-A to cutaway view Amplified image, as shown in the figure: the novel mean velocity tube flowmeter of present embodiment, comprise probe 1 and impulse joint 4, in the probe 1 seal pad 7 is set, seal pad 7 will be popped one's head in and will be divided into the low-pressure cavity 2 and the high pressure chest 3 of isolation sealed to each other in 1, described low-pressure cavity 2 is provided with low-pressure cavity tracting pressuring hole 21, high pressure chest 3 is provided with high pressure chest tracting pressuring hole 31, probe 1 is wholely set by the one-off drawing moulding process with seal pad 7, forms integral structure, and technology is simple, serviceable life after the assurance moulding, thus long-period stable operation guaranteed; The xsect front side of probe 1 is warhead form, reduces fluid resistance as far as possible, guarantees to get stable pressure difference signal; The front side surface mill bulk processing of probe 1 can guarantee in flow velocity has big variation range that probe 1 surface boundary layer all is disturbed flow condition, makes under the fluid low speed situation and still can obtain accurate signal;

Low-pressure cavity tracting pressuring hole 21 is arranged on the two sides of low-pressure cavity 2, and not only assurance is not blocked, also avoids being subjected to vortes interference, makes low-voltage signal more stable, and is more accurate; High pressure chest tracting pressuring hole 31 is arranged on the front side, the number of tracting pressuring hole has different the setting according to the different model of probe 1, in the present embodiment, low-pressure cavity tracting pressuring hole 21 every sides are six and vertically arrange, high pressure chest tracting pressuring hole 31 is six and vertically arranges, tracting pressuring hole is provided with a plurality of, can truly reflect the mean flow rate of fluid; Impulse joint 4 is provided with high-pressure channel 42 and low-pressure channel 41 for being wholely set in the joint, described high pressure chest 3 links to each other with the high-pressure outlet 6 of impulse joint 4 by high-pressure channel 42, and described low-pressure cavity 2 links to each other with the low tension outlet 5 of impulse joint 4 by low-pressure channel 41.

Explanation is at last, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.

Claims

1. novel mean velocity tube flowmeter, comprise probe (1) and impulse joint (4), seal pad (7) is set in the described probe (1), seal pad (7) will be popped one's head in and will be divided into the low-pressure cavity (2) and the high pressure chest (3) of isolation sealed to each other in (1), described low-pressure cavity (2) is provided with low-pressure cavity tracting pressuring hole (21), high pressure chest (3) is provided with high pressure chest tracting pressuring hole (31), it is characterized in that: described probe (1) is wholely set with seal pad (7).

2. novel mean velocity tube flowmeter according to claim 1 is characterized in that: described low-pressure cavity tracting pressuring hole (21) is arranged on the two sides of low-pressure cavity (2).

3. novel mean velocity tube flowmeter according to claim 2, it is characterized in that: described impulse joint (4) is for being wholely set, high-pressure channel (42) and low-pressure channel (41) are set in the joint, described high pressure chest (3) links to each other with the high-pressure outlet (6) of impulse joint (4) by high-pressure channel (42), and described low-pressure cavity (2) links to each other with the low tension outlet (5) of impulse joint (4) by low-pressure channel (41).

4. novel mean velocity tube flowmeter according to claim 3 is characterized in that: described high pressure chest tracting pressuring hole (31) is arranged on the front side.

5. novel mean velocity tube flowmeter according to claim 4 is characterized in that: described high pressure chest tracting pressuring hole (31) and low-pressure cavity tracting pressuring hole (21) are more than one and vertically arrange.

6. novel mean velocity tube flowmeter according to claim 5 is characterized in that: the xsect front side of probe (1) is a warhead form.

7. novel mean velocity tube flowmeter according to claim 6 is characterized in that: the front side surface mill bulk processing of probe (1).