CN206919943U - A kind of block-resistant type V cone flow meters - Google Patents

Abstract

The utility model provides a kind of block-resistant type V cone flow meters, including body, the tube wall upper surface of body is sequentially arranged at intervals with positive pressure tappings and negative pressure tappings, positive pressure tappings and negative pressure tappings are respectively arranged with positive pressure pipe and negative pressure pipe, the lower end of negative pressure pipe is connected with the front end of communicating pipe, bullet is set with the middle part of communicating pipe, the back-end sealing of communicating pipe is simultaneously connected with support bar, the both ends of support bar are fixedly connected with the tube wall of body, the rear section side face of communicating pipe is symmetrically arranged with two protruded tubes, the top sealing of protruded tube, the bottom of protruded tube connects with communicating pipe, the trailing flank of protruded tube is provided with some through holes.Block-resistant type V cone flow meters provided by the utility model, are improved to negative pressure pipe connectivity structure, prevent stopping state, ensure the normal use of flowmeter.

Description

A kind of block-resistant type V cone flow meters

Technical field

A kind of V cone flow meters are the utility model is related to, more particularly to one kind prevents negative pressure pipe connectivity structure from blocking V cone flow meters.

Background technology

V wimble structure flowmeters are based on Venturi measuring principle and have made the improvement of matter to traditional venturi tube structure, And integrate the throttling arrangement of the feature performance benefit of classical venturi tube, annular oriffice, wear-resisting orifice plate and conical entrance orifice plate, It can be achieved accurately to measure the flow of various media.It is throttled by being suspended on pipeline center bullet, By fluid contraction to inner-walls of duct, fluid is allowed to flow through the gap formed by bullet and inside pipe wall, before forming throttling element Differential pressure afterwards, by measuring its differential pressure value, realize the measurement of flow.

But during the use of V cone flow meters, negative pressure pipe is taken by a return-flow structure communicated therewith Pressure, easily make to be detained impurity in the connectivity structure and cause blocking, influence the normal use of flowmeter.

Utility model content

The technical problems to be solved in the utility model is to overcome the defects of existing, there is provided a kind of block-resistant type V cone flow meters, is prevented Only stopping state occurs.

In order to solve the above-mentioned technical problem, the utility model provides following technical scheme：

A kind of block-resistant type V cone flow meters, including body, the tube wall upper surface of the body are sequentially arranged at intervals with positive pressure Mouth and negative pressure tappings, the positive pressure tappings and negative pressure tappings are respectively arranged with positive pressure pipe and negative pressure pipe, the negative pressure pipe Lower end be connected with the front end of communicating pipe, bullet is set with the middle part of the communicating pipe, the back-end sealing of the communicating pipe is simultaneously Support bar is connected with, the both ends of the support bar are fixedly connected with the tube wall of the body, and the rear section side of the communicating pipe faces Title is provided with two protruded tubes, and the top sealing of the protruded tube, the bottom of the protruded tube connects with the communicating pipe, described The trailing flank of protruded tube is provided with some through holes.

Further, the inside top of the protruded tube is installed with the collar, and deashing rod is socketed with the collar.

A kind of block-resistant type V cone flow meters of the utility model, are improved to negative pressure pipe connectivity structure, prevent stopping state Occur, ensure the normal use of flowmeter.

Brief description of the drawings

Accompanying drawing is used for providing further understanding to of the present utility model, and a part for constitution instruction, with this practicality New embodiment is used to explain the utility model together, does not form to limitation of the present utility model.In the accompanying drawings：

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

Embodiment

Preferred embodiment of the present utility model is illustrated below in conjunction with accompanying drawing, it will be appreciated that described herein excellent Select embodiment to be merely to illustrate and explain the utility model, be not used to limit the utility model.

As shown in figure 1, a kind of block-resistant type V cone flow meters, including body 1, the tube wall upper surface of body 1 are arranged at intervals successively There are positive pressure tappings 2 and negative pressure tappings, positive pressure tappings 2 and negative pressure tappings are respectively arranged with positive pressure pipe (being not drawn into figure) and born and take Pressure pipe 3, the lower end of negative pressure pipe 3 are connected with the front end of communicating pipe 4, and the middle part of communicating pipe 4 is set with bullet 5, communicating pipe 4 Back-end sealing is simultaneously connected with support bar 6, and the both ends of support bar 6 are fixedly connected with the tube wall of body 1, the back segment side of communicating pipe 4 Two protruded tubes 7, the top sealing of protruded tube 7 are symmetrically arranged with, the bottom of protruded tube 7 connects with communicating pipe 4, protruded tube 7 Trailing flank is provided with some through holes.Using multipoint mode pressure taking method, reduce the pressure of single pressure tappings, so as to reduce blocking wind Danger.

The inside top of protruded tube 7 is installed with the collar 8, deashing rod 9 is socketed with the collar 8, deashing rod is in pressure Random swing is carried out in journey, stopping state can be avoided by rapping.

The characteristics of the utility model is：

Uncertainty：± 0.5% (after demarcation precision reachable ± 0.3%, available for Trade Measures).

Reproducible, signal stabilization：Better than orifice plate 1/10.

Crushing is small：Same β value, crushing are orifice plates 1/3~1/5.

Reynolds number range:5 × 103~1 × 107 upper limits can be higher, and lower limit can be lower.

Range ratio is wide：Usually 10：1, select suitable parameter highest to accomplish 50：1.

Pipeline scope is wide：Line size is from 1/2 "~80 " (DN15~2000mm).

β value scope is wide：Geometry unique V-cone allows have extensive β value scope.The β value of standard is 0.450, 0.550,0.650,0.750,0.850, and can specific β value to ensure that the output of user's specific differential pressure (does not increase expense yet not shadow Ring delivery date).

Installation requirement is low：Center V-arrangement throttling, remolds current curve, is not required to straight length rectification, and installation flow development length only needs 1~3D of upstream, 0~1D of downstream.

It is wear-resistant：After streamlined V bullets throttling, produce wire body effect of boundary layer on bullet surface and cause bullet not It is easy to wear, without periodic cleaning, part is changed, without repeating to demarcate.

Do not block, do not adhere to：The thorough sweeping type of taper designs the stagnant of the residue avoided in fluid, coagulation or particle Stay.

Long-time stability are good：β rates can remain unchanged for a long period of time, and ensure long-term accurate measurement.

Complete in specifications, mounting means is flexible.

It is adaptable to measured medium.Can pyrometry, high-pressure medium：700 DEG C of operating temperature highest, maximum pressure 42Mpa；Dirty medium (coke-stove gas, blast furnace gas, feedstock oil, residual oil etc.) can be surveyed；It is (moisture, cold that gas-liquid two-phase medium can be surveyed Condensate etc.).

A kind of block-resistant type V cone flow meters of the utility model, are improved to negative pressure pipe connectivity structure, prevent stopping state Occur, ensure the normal use of flowmeter.

Finally it should be noted that：Preferred embodiment of the present utility model is the foregoing is only, is not limited to this Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art For, it can still modify to the technical scheme described in foregoing embodiments, or to which part technical characteristic Carry out equivalent substitution.All any modification, equivalent substitution and improvements within the spirit and principles of the utility model, made etc., It should be included within the scope of protection of the utility model.

Claims (2)

1. A kind of 1. block-resistant type V cone flow meters, it is characterised in that：Including body, the tube wall upper surface of the body is spaced successively to be set Positive pressure tappings and negative pressure tappings are equipped with, the positive pressure tappings and negative pressure tappings are respectively arranged with positive pressure pipe and negative pressure pipe, institute The lower end for stating negative pressure pipe is connected with the front end of communicating pipe, and bullet is set with the middle part of the communicating pipe, the communicating pipe Back-end sealing is simultaneously connected with support bar, and the both ends of the support bar are fixedly connected with the tube wall of the body, the communicating pipe Rear section side face is symmetrically arranged with two protruded tubes, and the top sealing of the protruded tube, the bottom of the protruded tube connects with described Pipe connects, and the trailing flank of the protruded tube is provided with some through holes.
2. A kind of 2. block-resistant type V cone flow meters according to claim 1, it is characterised in that：The inside top of the protruded tube The collar is installed with, deashing rod is socketed with the collar.