CN203148476U

CN203148476U - Novel V-shaped conical flow meter

Info

Publication number: CN203148476U
Application number: CN 201320160807
Authority: CN
Inventors: 李树波; 张克军; 黄少军
Original assignee: WEIHAI NAER INSTRUMENT TECHNOLOGY Co Ltd
Current assignee: WEIHAI NAER INSTRUMENT TECHNOLOGY Co Ltd
Priority date: 2013-04-02
Filing date: 2013-04-02
Publication date: 2013-08-21
Anticipated expiration: 2023-04-02

Abstract

The utility model relates to a novel V-shaped conical flow meter which solves the technical problems that a central line of a V-shaped cone of an existing V-shaped conical flow meter is easily deflected from an axis of a measuring pipe and therefore measuring accuracy and stability are influenced. The novel V-shaped conical flow meter comprises the measuring pipe, a positive pressure taking pipe, a negative pressure taking pipe, a radial pressure guiding pipe and a V-shaped cone, wherein the positive pressure taking pipe and the negative pressure taking pipe are arranged on the measuring pipe, the radial pressure guiding pipe is perpendicular to the measuring pipe and communicated with the negative pressure guiding pipe, the closed V-shaped cone which is of a hollow structure is arranged inside the measuring pipe, the front end of the V-shaped cone is an incident flow body end, the rear end of the V-shaped cone is provided with a rear cover, an axial pressure guiding pipe which penetrates through and extends out of the front end of the V-shaped cone and the rear end of the V-shaped cone is arranged inside the V-shaped cone, the left end of the axial pressure guiding pipe is connected with the radial pressure guiding pipe, and a supporting rod is arranged between the axial pressure guiding pipe and the measuring pipe. The novel V-shaped conical flow meter is widely applied to V-shaped conical flow meters.

Description

A kind of novel V cone flow meter

Technical field

The utility model relates to a kind of differential pressure flowmeter, particularly relates to a kind of novel V cone flow meter.

Background technology

At present, measure the flow field at differential pressure type, the V cone flow meter has precision height, good reproducibility, is subjected to the superperformance that the mounting condition limitation is little, wear-resistant, measurement range is wide, so it is widely used.As shown in Figure 1 in the Figure of description, existing V cone flow meter mainly by measuring tube, positive and negative pressure pipe, radially pressure guiding pipe, V-type cone and axially pressure guiding pipe forms, wherein the V-type cone places measuring tube inside, an end is connected with axial pressure guiding pipe, the other end is unsettled.Mainly there are two point defects in this structure, and on the one hand the center line of V-type cone easily and the axis runout of measuring tube does not reach coincidence, has a strong impact on flow measurement accuracy of measurement and stability; Be on the other hand when big flow MEDIA FLOW through the time, the V-type cone is washed out easily.

Summary of the invention

The utility model provides the novel V cone flow meter that a kind of measuring accuracy is higher, stability is higher in order to solve the problems of the technologies described above.

The utility model provides a kind of novel V cone flow meter, it is provided with measuring tube, is arranged at officially enroll pressure pipe and negative pressure pipe and radially pressure guiding pipe vertical with measuring tube and that be communicated with negative pressure pipe on the measuring tube, be provided with the V-type cone of the hollow structure of sealing in the measuring tube, the front end of V-type cone is for meeting fluid end, the rear end is provided with bonnet, be provided with the axial pressure guiding pipe that runs through and stretch out the front-end and back-end of V-type cone in the V-type cone, axially the left end of pressure guiding pipe is connected with pressure guiding pipe radially, is provided with support bar between axial pressure guiding pipe and the measuring tube.

The utility model optimized technical scheme is that support bar is equally distributed three bodies of rod on the xsect of measuring tube.

The further optimized technical scheme of the utility model is that the two ends of measuring tube are provided with flange.

The utility model more further optimized technical scheme be, the fluid end of meeting of V-type cone is provided with bevel angle, the angle of bevel angle is 46.5 °.

The beneficial effects of the utility model are, adopted the supporting bar structure that is used for fixed support V-type cone, make the center line of V-type cone keep overlapping with the axis of measuring tube on the one hand, avoid the V-type cone to be washed out by big flow medium on the other hand, therefore flowmeter stable and reliable operation, measuring accuracy is higher, stability is higher.The angle of the bevel angle of meeting fluid end of V-type cone is 46.5 °, and to the fluid resistance minimum of forward, thereby the pressure that the pressure tappings of the pressure pipe of officiallying enroll is measured is more accurate, makes final measurement numerical value more accurate.

The further feature of the utility model will clearly be put down in writing in the description of following embodiment.

Description of drawings

Fig. 1 is the structural representation of prior art V cone flow meter;

Fig. 2 is structural representation of the present utility model;

Fig. 3 is the right view of Fig. 2.

The reference numeral explanation:

1. measuring tube; 2. the pressure pipe of officiallying enroll; 3. bear the pressure pipe; 4. pressure guiding pipe radially; 5.V type cone; 6. axial pressure guiding pipe; 7. support bar.

Embodiment

As shown in Figures 2 and 3, the utility model is provided with measuring tube 1, and the two ends of measuring tube 1 are provided with flange, also is provided with officially enroll pressure pipe 2 and negative pressure pipe 3 on the measuring tube 1, with measuring tube 1 radially pressure guiding pipe 4 vertical and that be communicated with negative pressure pipe 3.Be provided with V-type cone 5 in the measuring tube 1, V-type cone 5 is the hollow structure of sealing, and the front end of V-type cone 5 is for meeting fluid end, and the rear end is provided with bonnet.Be provided with axial pressure guiding pipe 6 in the V-type cone 5, axially pressure guiding pipe 6 runs through and stretches out the front-end and back-end of V-type cone 5, and axially the left end of pressure guiding pipe 6 is connected and its pipeline connection with pressure guiding pipe 4 radially, and right-hand member is negative pressure impulse mouth.

Axially be provided with support bar 7 between the inwall of the right-hand member of pressure guiding pipe 6 and measuring tube 1, support bar 7 plays fixed support V-type cone 5, make on the one hand the center line of V-type cone 5 keep overlapping with the axis of measuring tube 1, avoid when suitable big flow medium V-type cone 5 to be washed out on the other hand.In order better to play the support fixation effect, support bar 7 is equally distributed three bodies of rod on measuring tube 1 xsect.

Need to prove support bar 7 composition fixed support parts, be not limited to rod-like structure, can also be other members that can reach effect same.

The angle of the bevel angle of meeting fluid end of V-type cone 5 is 46.5 °.This angle is to obtain the best angle value through a large amount of experiments, and to the fluid resistance minimum of forward, thereby the pressure that the pressure tappings of the pressure pipe of officiallying enroll is measured is more accurate.

Shown in arrow among the figure, measured medium flows according to the arrow direction, the fluid V-type cone 5 of flowing through, be subjected to the inwall extruding of outer wall and the measuring tube 1 of V-type cone 5, flow velocity increases and pressure reduces, negative pressure impulse mouth place fluid at axial pressure guiding pipe 6 presents relative static conditions, can get stable negative pressure herein.Simultaneously because the support fixation effect of support bar 7 makes final degree of accuracy and the stability of measuring improve greatly.

The above only to preferred embodiment of the present utility model, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.Every in claim limited range of the present utility model, any modification of making, be equal to replacement, improvement etc., all should be within protection domain of the present utility model.

Claims

1. novel V cone flow meter, be provided with measuring tube, be arranged at officially enroll pressure pipe and negative pressure pipe on the measuring tube, and radially pressure guiding pipe vertical with described measuring tube and that be communicated with described negative pressure pipe, be provided with the V-type cone of the hollow structure of sealing in the described measuring tube, the front end of described V-type cone is for meeting fluid end, the rear end is provided with bonnet, be provided with the axial pressure guiding pipe that runs through and stretch out the front-end and back-end of described V-type cone in the described V-type cone, the left end of described axial pressure guiding pipe is connected with described radially pressure guiding pipe, it is characterized in that, be provided with support bar between described axial pressure guiding pipe and the described measuring tube.

2. novel V cone flow meter according to claim 1 is characterized in that described support bar is equally distributed three bodies of rod on the xsect of described measuring tube.

3. novel V cone flow meter according to claim 1 and 2 is characterized in that the two ends of described measuring tube are provided with flange.

4. novel V cone flow meter according to claim 3 is characterized in that the fluid end of meeting of described V-type cone is provided with bevel angle, and the angle of described bevel angle is 46.5 °.