CN204864416U

CN204864416U - Throttling arrangement

Info

Publication number: CN204864416U
Application number: CN201520295328.0U
Authority: CN
Inventors: 许庆宾; 徐恒谦
Original assignee: Influence Of New Technology Development Co Ltd (beijing)
Current assignee: Influence Of New Technology Development Co Ltd (beijing)
Priority date: 2015-05-08
Filing date: 2015-05-08
Publication date: 2015-12-16
Anticipated expiration: 2025-05-08

Abstract

The utility model provides a throttling arrangement, throttling arrangement are one section pipe, include: first stationary flow section (20A), throat (20B) and second stationary flow section (20C), throat (20B) is located between first stationary flow section (20A) and the second stationary flow section (20C), and the internal diameter of throat (20B) is littleer than first stationary flow section (20A) and second stationary flow section (20C), two pressure collecting mouth (31) set up on throat (20B) fore -and -after pipe respectively. The utility model discloses an advantage includes: guaranteeing not only to be applicable to the occasion that airflow direction can take place positive and negative change under the prerequisite that the expectoration machine required to flow measurement, the dead space volume is little simultaneously, and simple structure makes efficiently, with low costs, and convenient to use is fit for the use as disposable product.

Description

A kind of throttling arrangement

Technical field

This utility model relates to a kind of measurement device, more specifically, relates to a kind of throttling arrangement for differential flow transducer.

Background technology

Full automatic synchronization expectoration machine be a kind of by with respirator conbined usage, for removing the armarium of patient airway secretions, be applicable to use respirator to provide the patient of wound mechanical ventilation.Its principle is the physiology cough mechanism utilizing simulation normal person, after respirator applies an inspiratory flow to patient, rapidly to patient apply one suddenly, very brief expiratory airflow, the airway secretions of patient is impelled to discharge, when airway secretions is expelled to tracheal intubation place, then connected outside central negative pressure attraction system discharge patient body by sputum aspirator tube.The potential benefit of this equipment also has, sputum attracts out and removes by the part that it cannot be able to touch from those sputum aspirator tubes of lung deep in noninvasive mode, and it can fully automatic operation thus realize the effect that moves sputum continuously, improve airway resistance under without the need to the condition of manpower intervention.Meanwhile, this equipment also reduces the sense of discomfort of patient when suction sputum operates and the labor intensity of medical personnel.

Expectoration machine, in order to detect the mechanical ventilation situation of patient, needs the gas circuit between respirator and patient arranges flow and pressure-detecting device.

In current clinical practice, existing multiple differential pressure flowmeter, all comprises a kind of throttling arrangement, adopts the way reducing fluid passage section, make the pressure of the fluid flowed through before and after throttling arrangement produce difference, and difference infers the flow of fluid thus.

Wherein aly be, its throttling arrangement entirety is a straight coupling having special shape and structure, be specially: there are two standard interfaces, can be used for being connected in breathing pipeline, two interface mid portions are an enclosed space, and this enclosed space sectional area increases gradually from standard interface place, when increasing to the most centre position of throttling arrangement, stop increasing and starting to reduce gradually, until sectional area is equal with another standard interface.In the most centre position of throttling arrangement, have a thin slice, compartition in throttling arrangement is two parts by thin slice.There is an annular incision its central position, this otch make its central part can with thin slice at angle, thus make throttling arrangement have certain actual internal area, but still can ensure that core does not depart from thin slice.When there being gas flow out-of-date in throttling arrangement, its central is driven by air-flow, angled with slice-shaped, when the flow flowing through throttling arrangement is larger, angle between its central and thin slice is larger, and throttling arrangement actual internal area is larger, but still is less than the entrance and exit of throttling arrangement.The advantage with the effusion meter of this throttling arrangement be measured flow less time, possess higher precision.

But his shortcoming is also clearly: 1, cavity volume is large, in breathing circuit time, the VD of gas circuit can be increased, be unfavorable for the mechanical ventilation of patient; 2, structure is more complicated, and cost is higher, is unfavorable for using as disposable product, and complex structure also reduces production efficiency during manufacture equally.

Another money is, has the effusion meter of the throttling arrangement of throttling section-variable, and when the gas flow flowing through this throttling arrangement increases, the throttle orifice originally closed can be opened by the pressure thereupon increased, and always achieves the change of orifice size.The advantage of this effusion meter is, because orifice size is variable, so can keep more high measurement accuracy in greater amount journey, his shortcoming is the gas flow being only suitable for measuring one way flow, is not suitable for the occasion having airflow direction that positive anti-change can occur.

Utility model content

In order to solve the practical demand described in background technology, this utility model provides a kind of throttling arrangement, throttling arrangement is one section of pipe, comprise: the first steady flow segment, throat and the second steady flow segment, throat between the first steady flow segment and the second steady flow segment, the internal diameter of throat than the first steady flow segment and the second steady flow segment little; Two pressure acquisition mouths, are separately positioned on the pipe before and after throat.

Optionally, the internal diameter of the first steady flow segment and the second steady flow segment is constant.

Optionally, the internal diameter of the first steady flow segment and the second steady flow segment is more less close to throat.

Further, the first steady flow segment and the second steady flow segment are connected with throat arc transition.

Further, the internal diameter of the first steady flow segment and the second steady flow segment is less than the internal diameter of pipe two end interface.

Further, two pressure acquisition mouths are separately positioned on the first steady flow segment and the second steady flow segment.

Further, described throttling arrangement is symmetrical structure, get perpendicular to throttling arrangement main body axis, with the equidistant plane in two ends, throttling arrangement is relative to this plane symmetrically structure.

Further, throat's minimum diameter is 8mm, and throat length is 2.5mm; The internal diameter of the first steady flow segment and the second steady flow segment is difference 10mm, and length is respectively 10mm; The internal diameter of pressure acquisition mouth is 2.5mm, the center 6mm of pressure acquisition mouth distance throat.

Compared with prior art, advantage of the present utility model comprises: ensureing under the prerequisite that expectoration machine requires for flow measurement, not only be applicable to the occasion that positive anti-change can occur airflow direction, VD is little simultaneously, structure is simple, and manufacture efficiency high, cost is low, easy to use, be suitable as disposable product and use.

Accompanying drawing explanation

Fig. 1 is the axonometric chart of throttling arrangement of the present utility model.

Fig. 2 is the sectional view of the throttling arrangement shown in Fig. 1.

Reference numeral

20 throttling arrangement 20A first steady flow segments

20B throat 20C second steady flow segment

31 pressure acquisition mouths

Detailed description of the invention

Describe embodiment of the present utility model with reference to the accompanying drawings, the identical Reference numeral of wherein identical parts represents.

Fig. 1 shows the axonometric chart of throttling arrangement of the present utility model, and Fig. 2 shows the sectional view of throttling arrangement.Throttling arrangement 20 be one section of pipe, comprising: the first steady flow segment 20A, throat 20B and the second steady flow segment 20C.Throat 20B is between the first steady flow segment 20A and the second steady flow segment 20C.The internal diameter of throttling arrangement 20 is not uniform, and the internal diameter of throat 20B is less than the first steady flow segment 20A and the second steady flow segment 20C.When fluid flows through position (the throat 20B) that this internal diameter diminishes can because flow area diminish cause flowing through throat before with flow through throat after the pressure of fluid there is non-vanishing difference, the flow of fluid can be inferred by this difference.

The internal diameter of the first steady flow segment 20A and the second steady flow segment 20C is constant or change is very little.If internal diameter is change, so variation tendency is: more less close to throat's 20B internal diameter.

Preferably, the first steady flow segment 20A is connected by arc transition with the inner surface of throat 20B with the second steady flow segment 20C.

Preferably, the internal diameter of the first steady flow segment 20A and the second steady flow segment 20C is less than the internal diameter of pipe two ends interface portion.

Preferably, before and after throat 20B, a pressure acquisition mouth 31 is respectively arranged with.

Preferably, two pressure acquisition mouths 31 are separately positioned on the first steady flow segment 20A and the second steady flow segment 20C.

Preferably, throttling arrangement 20 is symmetrical structures, get perpendicular to throttling arrangement main body axis, with the equidistant plane in two ends, throttling arrangement is relative to this plane symmetrically structure.

Preferably, the two ends of throttling arrangement adopt and meet air tube joint industry-standard sizes, so that access in the middle of breathing pipeline and patient's pipeline.Preferably, the industry standard taper joint size of 15mm specification is adopted.Preferably, throat 20B minimum diameter is 8mm, and throat 20B length is 2.5mm.Preferably, the internal diameter of the first steady flow segment 20A and the second steady flow segment 20C is difference 10mm, and length is respectively 10mm.Preferably, the internal diameter of throat 20B pressure at both sides acquisition port 31 is 2.5mm.Preferably, pressure acquisition mouth 31 is apart from the center 6mm of throat 20B.

Optionally, this throttling arrangement 20 can make an entirety with structures such as other pipelines or pipeline parts, pipe joint, pipe valves.

The manufactured materials of throttling arrangement can be the macromolecular materials such as PP (polypropylene), PE (polyethylene), ABS (acrylonitrile-butadiene-styrene copolymer), PVC (polrvinyl chloride), nylon (Fypro), also can be other materials, as the metal material such as rustless steel, aluminium alloy.

Throttling arrangement of the present utility model may be used in flow transducer.

Above-described embodiment, just this utility model more preferably detailed description of the invention, the usual change that those skilled in the art carries out within the scope of technical solutions of the utility model and replacement all should be included in protection domain of the present utility model.

Claims

1. a throttling arrangement, is characterized in that, throttling arrangement is one section of pipe, comprising:

First steady flow segment (20A), throat (20B) and the second steady flow segment (20C), throat (20B) is positioned between the first steady flow segment (20A) and the second steady flow segment (20C), the internal diameter of throat (20B) than the first steady flow segment (20A) and the second steady flow segment (20C) little;

Two pressure acquisition mouths (31), are separately positioned on the pipe before and after throat (20B).

2. throttling arrangement according to claim 1, is characterized in that, the internal diameter of the first steady flow segment (20A) and the second steady flow segment (20C) is constant.

3. throttling arrangement according to claim 1, is characterized in that, the internal diameter of the first steady flow segment (20A) and the second steady flow segment (20C) is more less close to throat (20B).

4. throttling arrangement according to claim 3, is characterized in that, the first steady flow segment (20A) is connected with throat (20B) arc transition with the second steady flow segment (20C).

5. throttling arrangement according to claim 3, is characterized in that, the internal diameter of the first steady flow segment (20A) and the second steady flow segment (20C) is less than the internal diameter of pipe two end interface.

6. throttling arrangement according to claim 1, is characterized in that, two pressure acquisition mouths (31) are separately positioned on the first steady flow segment (20A) and the second steady flow segment (20C).

7. throttling arrangement according to claim 1, is characterized in that, described throttling arrangement is symmetrical structure, get perpendicular to throttling arrangement main body axis, with the equidistant plane in two ends, throttling arrangement is relative to this plane symmetrically structure.

8. throttling arrangement according to claim 1, is characterized in that, throat (20B) minimum diameter is 8mm, and throat (20B) length is 2.5mm; The internal diameter of the first steady flow segment (20A) and the second steady flow segment (20C) is difference 10mm, and length is respectively 10mm; The internal diameter of pressure acquisition mouth (31) is 2.5mm, the center 6mm of pressure acquisition mouth (31) distance throat (20B).