CN101490563B

CN101490563B - A fluid sensor

Info

Publication number: CN101490563B
Application number: CN2007800178498A
Authority: CN
Inventors: 王东升
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-06-15
Filing date: 2007-06-12
Publication date: 2011-03-09
Anticipated expiration: 2027-06-12
Also published as: CN100432676C; CN1862261A; CN101490563A; WO2007147355A1

Abstract

A fluid sensor includes a valve body (1), a valve core (2) and a position sensor (8) for the valve core. The valve body (1) has an inner cavity (10) including an inflowing cavity (11) and an outflowing cavity (12), and there is an inflowing port (3) connecting with the inflowing cavity (11) at one side of the valve body (1), and there is an outflowing port (5) connecting with the outflowing cavity (12) at the other side. The valve core (2) is located inside the inner cavity (10) and a flowing path (4) is formed into the interior. The entrance (41) of the flowing path (4) is connected with the inflowing cavity (11). The valve core (2) can be moved between an original position and an operating position, and the exit (42) of the flowing path is blocked off by means of the inner wall of the valve body (1) at the original position, and the exit (42) of the flowing path is connected with the outflowing cavity (12) at the operating position. The position sensor (8) for the valve core is used to detect the position of the valve core (2). The inflowing cavity (11) is connected with the outflowing cavity (12) by means of a draining hole (6).

Description

Fluid sensor

Technical field

The present invention relates to a kind of sensor, relate in particular to a kind of test fluid, mobile fluid sensor of semifluid of being used for.

Background technology

The normal conveying of fluid and supply are crucial in the fluid system.For guaranteeing the accurately normal feed of fluid, need carry out reliable detection.At present, pick-up unit commonly used, as be used for flow director or the flow signals device that low pressure oil flows and indicates, and generally be by organic glass, the mobility status of Direct observation housing inner fluid, or add and amplify indication panel, carry out pointer by indication panel and show that the fluid media (medium) that is detected generally is dark color, and muddy, add that the installation site disperses, the scene is rather dark, thereby observe difficulty; And common flowmeter, flow sensor, though purposes is extensive, production cost is higher, is difficult to realize for the application of a large amount of multiple spots.More than cited pick-up unit, all also have some common defects, little as the scope of application, be only applicable to that the viscosity grade is low, the fluid of good fluidity, for viscosity grade high or mobile poor fluid, semifluid medium,, then can't detect as high viscosity lubricating oil and railway grease etc.; Secondly, voltage endurance capability is low, generally is only applicable to low-pressure system, and the voltage endurance capability owing to own material (as glass window, sensing element etc.) in high-pressure system is low, and can't operate as normal.Above-mentioned detection device often requires the supervisory personnel to carry out field review to the working site, has not only increased trouble and burden to the supervisory personnel, and labour intensity is big, and the work on the spot condition is poor, and has certain potential safety hazard, and its application is greatly limited.

Summary of the invention

Purpose of the present invention provides a kind of novel test fluid, the fluid sensor that semifluid flows, it is simple in structure, applied widely, production cost is low, can detect at a distance, and effectively improve the accuracy that detects, reduce labour intensity, improve security, thereby guarantee the normal feed of fluid system.

For achieving the above object, the invention provides a kind of fluid sensor, this fluid sensor comprises valve body, spool and valve core position sensor, wherein: described valve body has the inner chamber that comprises the influent stream chamber and go out to flow the chamber, and a side has the inflow port that is communicated with described influent stream chamber, and opposite side has with described and goes out to flow the head piece that goes out that the chamber is communicated with; Described spool is axially disposed within the inner chamber of valve body, and inside is formed with stream, the inlet of this stream is communicated with described influent stream chamber, and this spool is removable by acting between original position and the working position of reposition element and hydrodynamic pressure, wherein when described original position, the outlet of described stream and describedly go out to flow the chamber and end is for example stopped by the sidewall of valve body, when described working position, the outlet of described stream goes out to flow the chamber and is communicated with described; Described valve core position sensor is arranged on described spool and/or the valve body, is used to detect the position or the position change of spool; Described influent stream chamber and go out to flow between the chamber and communicate with each other by discharge orifice.

When the fluid system operate as normal, fluid enters the influent stream chamber by the inflow port of valve body, the elastic force that pressure by fluid overcomes reposition element promotes spool and slide into the working position in valve body, make the outlet of the stream in the spool arrive out the stream chamber, thereby influent stream chamber and go out to flow the chamber and communicate with each other by stream, thus fluid can be successfully successively through inflow port, influent stream chamber, stream, go out to flow the chamber, go out head piece and be transported to the working point.At this moment, valve core position sensor detects the position of spool, sends the normal signal of carrying of indication fluid.

When stopping for stream or causing for a certain reason arrheas or when going out head piece and stopping up, because influent stream chamber and go out to flow the chamber and be communicated with by stream, so the suffered hydrodynamic pressure in spool two ends trends towards equating.In this case, the elastic force of reposition element will promote the spool reverse slide, and the fluid in the influent stream chamber will enter out the stream chamber from the discharge orifice earial drainage at this moment, thereby finally make valve core reset, promptly turn back to its original position.At this moment, valve core position sensor detects resetting of spool, sends the signal that the indication fluid stops to carry.

By fluid sensor of the present invention, can in away from the pulpit of working site, learn the feed information of on-the-spot fluid automatically, avoid the supervisory personnel must arrive the fatigue of hurrying back and forth of working site site observation and detection, not only improve the accuracy that detects, improved condition of work, reduce labour intensity, improved security, and simple in structure, applied widely, production cost is low, can realize the centralized control and the unified management of fluid, is with a wide range of applications.

Description of drawings

Fig. 1 is the structural representation of a kind of embodiment of fluid sensor of the present invention.

Fig. 2 is the structural representation of the another kind of embodiment of fluid sensor of the present invention.

Fig. 3 is the structural representation of the another kind of embodiment of fluid sensor of the present invention.

Embodiment

With reference to the accompanying drawings embodiments of the present invention are described.

As shown in Figure 1, fluid sensor of the present invention can comprise valve body 1, spool 2 and valve core position sensor 8, wherein: described valve body 1 has the inner chamber 10 that comprises influent stream chamber 11 and go out to flow chamber 12, and a side has the inflow port 3 that is communicated with described influent stream chamber 11, and opposite side has with described and goes out to flow that chamber 12 is communicated with goes out head piece 5; Described spool 2 is axially disposed within the inner chamber 10 of valve body 1, and inside is formed with stream 4, the inlet 41 of this stream 4 is communicated with described influent stream chamber 11, and this spool 2 is removable by acting between original position and the working position of reposition element 7 and hydrodynamic pressure, wherein when described original position, the outlet 42 of described stream 4 goes out to flow chamber 12 and ends with described, is for example stopped by the sidewall of valve body 1, when described working position, the outlet 42 of described stream 4 goes out to flow chamber 12 and is communicated with described; Described valve core position sensor 8 is arranged on described spool 2 and/or the valve body 1, is used to detect the position or the position change of spool 2; Described influent stream chamber 11 and go out to flow between the chamber 12 and communicate with each other by discharge orifice 6.

When the fluid system operate as normal, fluid enters influent stream chamber 11 by the inflow port 3 of valve body 1, the elastic force that pressure by fluid overcomes reposition element 7 promotes spool 2 and upwards slides (direction among the figure) to the working position in valve body 1, make the outlet of the stream 4 in the spool 2 arrive out stream chamber 12, thereby influent stream chamber 11 and go out to flow chamber 12 and communicate with each other by stream 4, thus fluid can be successfully successively through inflow port 3, influent stream chamber 11, stream 4, go out to flow chamber 12, go out head piece 5 and be transported to the working point.At this moment, valve core position sensor 8 detects the position of spool 2, sends the normal signal of carrying of indication fluid.

When stopping for stream or causing for a certain reason arrheas or when going out head piece and stopping up, because influent stream chamber 11 and go out to flow chamber 12 and communicate with each other by stream 4, so the suffered hydrodynamic pressure in spool 2 two ends trends towards equating.In this case, the elastic force of reposition element 7 will promote spool 2 oppositely to lower slider (direction among the figure), and the fluid in the influent stream chamber 11 will enter out stream chamber 12 from discharge orifice 6 earial drainages at this moment, thereby spool 2 is resetted, and promptly turn back to its original position.At this moment, valve core position sensor 8 detects resetting of spool 2, sends the signal that the indication fluid stops to carry.

Valve core position sensor 8 can adopt the various sensors that can detect the spool position variation in the prior art, for example contact-type or non contacting position sensor, as Hall element, near switch etc., Hall switch-HA2M14 of producing of the intercalation peace industrial sensor in Shanghai company limited for example.Valve core position sensor 8 can send the signal of indication spool position by any technique known outside (as the watch-dog of outside), for example can pass through electromagnetic wave, cable or the like.Valve core position sensor 8 can be arranged on any suitable position on valve body 1 and/or the spool 2.

Described inflow port 3 is preferably formed in the end wall of valve body 1, describedly go out head piece 5 and be formed in the sidewall of valve body 1, described stream 4 can comprise with inflow port 3 coaxial extend axially passage and the radially extension passage parallel with going out head piece 5.

Described spool 2 is preferably configured as but is not limited to have the multidiameter structure of small diameter portion 21 and major diameter part 22, and described small diameter portion 21 is positioned at the described chamber 12 that goes out to flow, and described reposition element 7 can be the compression spring that is looped around around the small diameter portion 21.Use this structure, member is processed easily, easy to use.In addition, adopt this multidiameter structure, compression spring can easily be installed, and can access and enough go out to flow chamber 12 fully, be convenient to the work of fluid sensor.

Describedly go out to flow the cross-sectional area in chamber 12 or cross-sectional area or the diameter that diameter is preferably greater than described influent stream chamber 11, thus can be easily by spool 2 slide between original position and the working position outlet that realizes stream 4 with go out to flow ending or being communicated with between the chamber 12, and structure is very simple, and is easy to process in the mill.But the invention is not restricted to this, for example described go out to flow chamber 12 also can with the equal diameters in described influent stream chamber 11, simultaneously described spool 2 is configured to other structure, the similar structure of for example described below and existing retaining valve.

Though provided the concrete structure of valve body 1 and spool 2 in the accompanying drawings, the invention is not restricted to this.For example, valve body 1 of the present invention and spool 2 can be configured to be similar to the such structure of retaining valve in the prior art, promptly by the slip of spool 2 between valve body 1 interior two positions, can correspondingly realize inflow port 3 and go out being communicated with or ending between the head piece 5.

As mentioned above, the effect of discharge orifice 6 is in order to keep influent stream chamber 11 and to go out to flow connection between the chamber 12, thereby when fluid stopped feed, the effect of the elastic force that spool 2 can be by reposition element such as compression spring 7 turned back to the original position.Therefore, discharge orifice 6 can have various shapes and structure, as long as it can realize above-mentioned functions.The example of discharge orifice 6 can include but not limited to: as shown in Figure 1, described discharge orifice 6 can be formed in the spool 2, directly is communicated with influent stream chamber 11 and goes out to flow chamber 12; Perhaps as shown in Figure 2, described discharge orifice 6 can be formed in the valve body 1, in the sidewall as valve body 1, directly is communicated with influent stream chamber 11 and goes out to flow chamber 12, perhaps directly is communicated with inflow port 3 and goes out to flow chamber 12, perhaps directly is communicated with inflow port 3 and goes out head piece 5; Perhaps, as shown in Figure 3, discharge orifice 6 can be formed in the spool 2, directly is communicated with stream 4 and goes out to flow chamber 12; Perhaps described discharge orifice 6 can also be the gap that is formed between the inside surface of the outside surface of spool 2 and described valve body 1.In addition, described discharge orifice 6 can form straight trough, perhaps helicla flute or the like, and this can select according to the needs of medium.

The present invention is applicable to various different fluid, semifluid medium such as liquid, gas, hydraulic oil, railway grease and gas-oil mixture etc., and suits to use in various pressure, viscosity scope.

Claims

1. fluid sensor, this fluid sensor comprises valve body (1), spool (2) and valve core position sensor (8), wherein:

Described valve body (1) has the inner chamber (10) that comprises influent stream chamber (11) and go out to flow chamber (12), and a side of described valve body (1) has the inflow port (3) that is communicated with described influent stream chamber (11), and the opposite side of described valve body (1) has with described and goes out to flow that chamber (12) is communicated with goes out head piece (5);

Described spool (2) is axially disposed within the inner chamber (10) of described valve body (1), the inside of spool (2) has stream (4), the inlet (41) of this stream (4) is communicated with described influent stream chamber (11), and this spool (2) is removable by acting between original position and the working position of reposition element (7) and hydrodynamic pressure, wherein when described original position, the outlet (42) of described stream (4) goes out to flow chamber (12) and ends with described; When described working position, the outlet (42) of described stream (4) goes out to flow chamber (12) and is communicated with described;

Described valve core position sensor (8) is arranged on described spool (2) and/or the valve body (1), is used to detect the position or the position change of spool (2);

Described influent stream chamber (11) and go out to flow between the chamber (12) and communicate with each other by discharge orifice (6).

2. fluid sensor according to claim 1, wherein said inflow port (3) is arranged in the end wall of valve body (1), describedly go out the sidewall that head piece (5) is arranged in valve body (1), described stream (4) comprise with inflow port (3) coaxial extend axially passage and the radially extension passage parallel with going out head piece (5).

3. fluid sensor according to claim 1, the wherein said cross-sectional area that goes out to flow the cross-sectional area in chamber (12) greater than described influent stream chamber (11).

4. fluid sensor according to claim 1, wherein said spool (2) is the multidiameter structure with small diameter portion (21) and major diameter part (22), described small diameter portion (21) is positioned at the described chamber (12) that goes out to flow, and described reposition element (7) is to be looped around small diameter portion (21) compression spring on every side.

5. fluid sensor according to claim 1, wherein said discharge orifice (6) is positioned at spool (2), directly is communicated with described influent stream chamber (11) and describedly goes out to flow chamber (12).

6. fluid sensor according to claim 1, wherein said discharge orifice (6) is positioned at spool (2), directly is communicated with described stream (4) and describedly goes out to flow chamber (12), thereby make described influent stream chamber (11) and describedly go out to flow chamber (12) and keep being communicated with.

7. fluid sensor according to claim 1, wherein said discharge orifice (6) is positioned at valve body (1), directly be communicated with described influent stream chamber (11) or inflow port (3) and go out to flow chamber (12) or go out head piece (5), thereby make described influent stream chamber (11) and describedly go out to flow chamber (12) and keep connection with described.

8. fluid sensor according to claim 1, wherein said discharge orifice (6) are the gaps that is positioned between the inside surface of the outside surface of spool (2) and described valve body (1), directly are communicated with described influent stream chamber (11) and go out to flow chamber (12).

9. fluid sensor according to claim 1, wherein said discharge orifice (6) is straight trough or helicla flute.