CN202096568U

CN202096568U - Fluid sensing device

Info

Publication number: CN202096568U
Application number: CN2011202003595U
Authority: CN
Inventors: 尹建国; 宁金香
Original assignee: HUNAN ETER ELECTRONIC MEDICAL PROJECT STOCK CO Ltd
Current assignee: HUNAN ETER ELECTRONIC MEDICAL PROJECT STOCK CO Ltd
Priority date: 2011-06-15
Filing date: 2011-06-15
Publication date: 2012-01-04
Anticipated expiration: 2021-06-15

Abstract

The utility model discloses a fluid sensing device. The fluid sensing device comprises a pipe body, wherein a piston valve is arranged in the inner cavity of the pipe body; the piston valve comprises a valve body and a valve core placed in the inner cavity of the valve body; the valve body is fixed on the inner cavity wall of the pipe body; the front end of the valve core is limited by a limiting part arranged in the inner cavity of the pipe body; a magnetic block is arranged on the valve core; a valve core return spring is arranged between the valve core and the valve body; the valve body is provided with a flow channel; one end of the flow channel is arranged on the valve body in the movement stroke of the valve core and is communicated with the inner cavity of the valve body; the other end of the flow channel is communicated with the inner cavity of the pipe body; and a proximity switch matched with the magnetic block on the valve core is arranged on the pipe body. The fluid sensing device of the utility model has the advantages of simple structure, high sensitivity, high reliability and low cost, can be widely applied to detecting flow of low-flow fluid in the pipeline, and is particularly suitable for detecting oxygen flow in a medical oxygen supply pipeline.

Description

A kind of fluid induction installation

Technical field

This utility model belongs to fluid detecting device, relates to a kind of fluid induction installation that can detect the flow of oxygen in the particularly medical oxygen supply pipeline of each fluid low discharge in the pipeline.

Background technology

Many like products that are used for fluid detection are arranged in the market, comprise high-end and product low side.Its middle and high end flow switch sensitivity is higher, detect effective, but complex structure, cost is high; Low-end product then sensitivity is lower, makes the detection of control system fluid flow produce hysteresis, causes the waste of the energy.

The utility model content

The purpose of this utility model is the defective that overcomes prior art, provides a kind of simple in structure, and cost is low, and is highly sensitive, the fluid induction installation of good reliability.

The technical scheme that this utility model technical solution problem is adopted is: the fluid induction installation comprises a body; The inner chamber of body is provided with piston valve; Said piston valve comprises valve body, places the spool of body cavity, and valve body is fixed on the internal chamber wall of body, and the front end of spool is spacing by the limiting component that is arranged on tube cavity; Spool is provided with magnetic piece, between spool and valve body, is provided with the spool return spring; Valve body is provided with runner, and an end of runner is located on the valve body in the valve core movement stroke and is communicated with body cavity, and the other end of runner is communicated with the inner chamber of body; Body be provided with spool on magnetic piece cooperate near switch.

Further technical scheme is:

The front end of said body is provided with the front end that thread ending cover is fixed on said limiting component valve body;

Be equipped with supporting bulb and ball cap with the rear end on the thread ending cover of said body front end.

The body of this utility model is connected on the fluid line, is connected with the detection control system near switch.When in the pipeline during conveyance fluid; Fluid moves from the front end promotion spool of body backward, opens runner when spool is retreated to the runner mouth, and the rear end of fluid along the runner on the valve body from body gets into pipeline; At this moment the magnetic piece on the spool is in and the scope that cooperates near switch, connects near inductive switching; When the fluid in the pipeline disappeared, spool return under the effect of aftertaste spring was closed runner with runner mouth sealing, and the magnetic piece on the spool breaks away from and the scope that cooperates near switch, near the switch disconnection that loses induction.This utility model is through near the cooperate variation that can accurately detect pipeline inner fluid of switch with piston valve, thereby produces signal, feeds back to detect control system and carry out work.The bulb that the body front and back end is provided with and ball cap are used for being connected of convenient and pipeline.

The utlity model has simple in structure, highly sensitive, good reliability, the advantage that cost is low can be widely used in the detection of low discharge fluid flow in the pipeline, is particularly suitable for detecting flow of oxygen in the medical oxygen supply pipeline.

Below in conjunction with accompanying drawing this utility model is described further.

Description of drawings

Fig. 1 is the structural representation of this utility model device.

Fig. 2 to Fig. 3 is respectively the different motion view of this utility model.

The specific embodiment

See Fig. 1, the fluid induction installation comprises a body 4, and the inner chamber of body 4 is provided with piston valve; Said piston valve comprises valve body 9, places the spool 6 of valve body 9 inner chambers; Valve body 9 is fixed on the internal chamber wall of body 4, and the front end of spool 6 is spacing by the limiting component backing pin 5 that is arranged on tube cavity, and backing pin 5 is fixed on the front end of valve body 9 by the thread ending cover that is located at the body front end 3; Spool 6 is embedded with magnetic piece 7, between spool 6 and valve body 9, is provided with spool return spring 8; Valve body 9 is provided with runner 12, and an end of runner 12 is located on the valve body 9 in spool 6 movement travels and is communicated with body cavity, and the other end of runner 12 is communicated with the inner chamber of body 4; In the slotted eye of body 4, be provided with spool 6 on magnetic piece 7 cooperate near switch 10, the thread ending cover 3 of body 4 front ends is provided with supporting bulb 1 and ball cap 2, the rear end of body 4 is provided with supporting bulb 11 and ball cap 2.

During use, the two ends of fluid induction installation body 4 are connected in the fluid line 14 through bulb 1,11 and ball cap 2, will near the two ends of switch 10 with detect control system 13 and be connected.When fluid not when A flows to the B place; Because the stretching, extension of spool return spring 8; Spool 6 is pushed up backing pin 5 places, see C place shown in Figure 1, fluid can not flow to the B place through the runner on the valve body 9 12; Do not respond near switch 10 and magnetic piece 7, do not produce signal feedback and give detection control system 13; As fluid when A flows to the B place; Because spool 6 receives fluidic impact, and spool return spring 8 will be compressed, when spool 6 front ends arrive D place as shown in Figure 2; Have near switch 10 and magnetic piece 7 and to respond to; Fluid flows to the B place through the runner on the valve body 9, will produce a switching signal and feed back to detection control system 13, detects control system 13 and carries out functional work; Continue owing to spool 6 receives fluidic impact, spool return spring 8 to be compressed when A flows to the B place as fluid; When spool 6 front ends arrive E place as shown in Figure 3, because being in extreme position, moves no longer backward spool 6, fluid flows to the B place through the runner on the valve body 96; At this moment; Still among sense state, feeding back to that this switching signal does not still change detects control system 13, detects control system 13 and still carries out functional work near switch 10 and magnetic piece 7; When having, fluid flow reduces; When A slowly flows to the B place because the stretching, extension of spool return spring 8, with spool 6 tops to backing pin 5 places; When spool 6 front ends arrive D place as shown in Figure 2 still when the A place moves; Runner 12 begins to close, and loses induction near switch 10 and magnetic piece 7, also will produce a switching signal and feed back to detection control system 13 and carry out functional work; When fluid flow continued to be decreased to zero, the C place that the arrival of spool 6 front ends is as shown in Figure 1 near switch 10 and not induction of magnetic piece 7, did not produce signal feedback and gives detection control system 13.

In this utility model, when the low discharge fluid flows to the B motion by flow direction from A, when fluid flow strengthens; Fluid flows to the B place through the runner on the valve body 9 12; The sectional area that its fluid passes through is with corresponding increase, and when fluid flow reduced, the sectional area that fluid passes through was with corresponding minimizing; Spool 6 is moved in travel range under the effect of spool return spring 8, produce various signals and feed back to detection control system 13.

Claims

1. a kind of fluid induction installation; It is characterized in that comprising a body, the inner chamber of body is provided with piston valve, and said piston valve comprises valve body, places the spool of body cavity; Valve body is fixed on the internal chamber wall of body; The front end of spool is spacing by the limiting component that is arranged on tube cavity, and spool is provided with magnetic piece, between spool and valve body, is provided with the spool return spring; Valve body is provided with runner, and an end of runner is located on the valve body in the valve core movement stroke and is communicated with body cavity, and the other end of runner is communicated with the inner chamber of body; Body be provided with spool on magnetic piece cooperate near switch.

2. fluid induction installation according to claim 1 is characterized in that the front end of said body is provided with the front end that thread ending cover is fixed on said limiting component valve body.

3. fluid induction installation according to claim 2 is characterized in that being equipped with supporting bulb and ball cap with the rear end on the thread ending cover of said body front end.