CN104422486A

CN104422486A - Flow meter

Info

Publication number: CN104422486A
Application number: CN201310370731.0A
Authority: CN
Inventors: 王应峰
Original assignee: Shanghai Kohler Electronics Ltd
Current assignee: Shanghai Kohler Electronics Ltd
Priority date: 2013-08-22
Filing date: 2013-08-22
Publication date: 2015-03-18
Anticipated expiration: 2033-08-22
Also published as: CN104422486B

Abstract

The invention discloses a flow meter. The flow meter comprises a transparent water path pipeline; an impeller is arranged in the water path pipeline; an infrared transmitter and a receiver are arranged at positions corresponding to the impeller and outside the two sides of the water path pipeline; the two sides of the inner wall of the water path pipeline are respectively provided with a concave lens; the concave surface of each concave lens is towards the impeller; the two concave lenses, the infrared transmitter and the receiver are in the same straight line; the straight line is parallel to the central axis of the impeller. As the concave lenses are arranged on the two sides inside the water path pipeline, the concave lenses can be used for scattering light when air flow flows in the water path pipeline, the receiver cannot receive a signal; when the water flow flows in the water path pipeline, the concave part of each concave lens is filled by the water flow, light can pass through the concave lens normally, and the receiver can receive the signal of the transmitter so that the flow rate condition of the water flow can be detected accurately.

Description

A kind of flowmeter

Technical field

The present invention relates to pick-up unit, particularly relate to a kind of flowmeter for the anhydrous detection of pipeline.

Background technology

Traditional flowmeter cannot detect that the material of flowing is air-flow or current.Because current or air-flow all can impeller rotate, light can be covered when the blade of impeller is between power valve and receiving tube, receiving end does not receive the signal of transmitting terminal, thus generation change in electric, by calculating the signal that two blades block, can impeller speed be calculated, and the corresponding flow of impeller speed, achieve flow detection.Therefore, as long as wheel rotation, flowmeter will measure flow, but can not judge air-flow or current.

When anhydrous in pipeline, and flowmeter has still been detected as water, and heating tube can continue heating, causes dry combustion method, causes the fault of equipment, even burn.

Therefore, the flowmeter designing a kind of accurate detection water flow is necessary.

Summary of the invention

The object of the invention is to overcome the deficiencies in the prior art, a kind of flowmeter of accurate detection water flow is provided.

Technical scheme of the present invention provides a kind of flowmeter, comprise transparent waterway pipe, impeller is provided with in described waterway pipe, outside the both sides of described waterway pipe, the space of corresponding described impeller is furnished with infrared transmitter and receiver, the corresponding described infrared transmitter in inwall both sides of described waterway pipe and the position of described receiver are respectively equipped with concavees lens, the concave surface facing described impeller of described concavees lens.

Preferably, two described concavees lens, described infrared transmitter and described receivers are located along the same line, and the central axis of described straight line and described impeller is parallel to each other.

Preferably, described concavees lens are formed by outputing semicircular groove on described inwall.

Preferably, described waterway pipe comprises water inlet pipe, worm pipe and rising pipe successively, and described impeller is arranged in described worm pipe.

Preferably, described flowmeter also comprises the U-shaped support for fixing described infrared transmitter and described receiver, and described infrared transmitter and described receiver lay respectively at the two ends of described U-shaped support.

Preferably, described concavees lens are by glass, or transparent organic glass, or transparent plastic, or clear gum thing solidify after make.

After adopting technique scheme, have following beneficial effect: because both sides arrange concavees lens in waterway pipe, when air-flow flows through in waterway pipe, concavees lens make divergence of beam, and receiver cannot receive signal; When current flow through in waterway pipe, current are filled with the recess of concavees lens, light normal through, receiver can receive the signal of transmitter.Thus the traffic conditions of current can be detected exactly.

Accompanying drawing explanation

Fig. 1 is the front view of flowmeter in one embodiment of the invention;

Fig. 2 is the side view of flowmeter in one embodiment of the invention;

Fig. 3 is concavees lens fundamental diagram in the gas flow in one embodiment of the invention;

Fig. 4 is the fundamental diagram of concavees lens in current in one embodiment of the invention;

Fig. 5 is the front view of flowmeter in another embodiment of the present invention.

The Reference numeral table of comparisons:

1---waterway pipe 2---infrared transmitter 3---receiver

4---concavees lens 5---U-shaped support 6---circuit boards

11---impeller 12---water inlet pipe 13---worm pipes

14---rising pipe L1---straight line L2---central axis

Embodiment

The specific embodiment of the present invention is further illustrated below in conjunction with accompanying drawing.

As shown in Figure 1, flowmeter comprises transparent waterway pipe 1, impeller 11 is provided with in waterway pipe 1, outside the both sides of waterway pipe 1, the position of corresponding impeller 11 is provided with infrared transmitter 2 and receiver 3, infrared transmitter 2 and receiver 3 are electrically connected with circuit board 6 respectively, the inwall both sides of waterway pipe 1 are respectively equipped with concavees lens 4, the concave surface facing impeller 11 of concavees lens 4 also maintains a certain distance with impeller 11, prevent from interfering with impeller 11, two concavees lens 4, infrared transmitter 2 and receiver 3 are positioned on same straight line L1, the central axis L2 of straight line L1 and impeller 11 is parallel to each other.

As shown in Figure 3, when air-flow flows through in waterway pipe 1, concavees lens 4 make divergence of beam, and receiver 3 cannot receive signal.As shown in Figure 4, when current flow through in waterway pipe 1, current are filled with the recess of concavees lens 4, are equivalent to make concavees lens 4 hours, light normal through, receiver 3 can receive the signal of infrared transmitter 2.Like this when there is air-flow in pipeline, although air-flow also can impeller rotate, but because the effect of concavees lens, infrared ray is decayed, cause receiver to can not receive the signal of infrared transmitter always, electric signal is always constant, is the same (namely circuit thinks anhydrous) with situation anhydrous in waterway pipe.Thus the traffic conditions of current can be detected exactly, avoid heating tube dry combustion method and cause fault, even burn.

Preferably, straight line L1 and central axis L2 can not be parallel to each other, as long as straight line L1 can through impeller 11, and can meet flowmeter and detects and the requirement that impeller 11 rotates all belong to protection scope of the present invention.

Preferably, as shown in Figure 5, concavees lens 4 also can be the semicircular grooves outputed on the inwall of waterway pipe 1.Because waterway pipe 1 inherently utilizes transparent material to make, inwall directly outputs groove, form the structure of similar concavees lens, save space and material.

In the present embodiment, as shown in Figure 2, waterway pipe 1 comprises water inlet pipe 12, worm pipe 13 and rising pipe 14 successively, and impeller 11 is arranged in worm pipe 13.Usual impeller 11 is arranged in worm pipe 13, but in order to realize object of the present invention, the invention is not restricted to impeller 11 and can only be arranged in worm pipe 13.

In the present embodiment, as shown in Figure 1, flowmeter also comprises the U-shaped support 5 for fixing infrared transmitter 2 and receiver 3, and infrared transmitter 2 and receiver 3 lay respectively at the two ends of U-shaped support 5.The support being respectively used to support infrared transmitter 2 and receiver 3 also can be set separately.

Preferably, concavees lens 4 are by glass, or transparent organic glass, or transparent plastic, or clear gum thing solidify after make.As long as the effect of scattering can be played, all belong to protection scope of the present invention.

The invention is not restricted to can only be used for detecting current, the liquid that other are transparent or semitransparent can also be detected.

The present invention due in waterway pipe both sides arrange concavees lens, when air-flow flows through in waterway pipe, concavees lens make divergence of beam, and receiver cannot receive signal; When current flow through in waterway pipe, current are filled with the recess of concavees lens, light normal through, receiver can receive the signal of transmitter.Thus the traffic conditions of current can be detected exactly.

Above-described is only principle of the present invention and preferred embodiment.It should be pointed out that for the person of ordinary skill of the art, on the basis of the principle of the invention, other modification some can also be made, also should be considered as protection scope of the present invention.

Claims

1. a flowmeter, comprise transparent waterway pipe, impeller is provided with in described waterway pipe, outside the both sides of described waterway pipe, the space of corresponding described impeller is furnished with infrared transmitter and receiver, it is characterized in that, the corresponding described infrared transmitter in inwall both sides of described waterway pipe and the position of described receiver are respectively equipped with concavees lens, the concave surface facing described impeller of described concavees lens.

2. flowmeter according to claim 1, is characterized in that, two described concavees lens, described infrared transmitter and described receivers are located along the same line, and the central axis of described straight line and described impeller is parallel to each other.

3. flowmeter according to claim 1, is characterized in that, described concavees lens are formed by outputing semicircular groove on described inwall.

4. flowmeter according to claim 1, is characterized in that, described waterway pipe comprises water inlet pipe, worm pipe and rising pipe successively, and described impeller is arranged in described worm pipe.

5. flowmeter according to claim 1, is characterized in that, described flowmeter also comprises the U-shaped support for fixing described infrared transmitter and described receiver, and described infrared transmitter and described receiver lay respectively at the two ends of described U-shaped support.

6. flowmeter according to claim 1, is characterized in that, described concavees lens are by glass, or transparent organic glass, or transparent plastic, or clear gum thing solidify after make.