CN203298809U

CN203298809U - Pulse flowmeter

Info

Publication number: CN203298809U
Application number: CN2013203170306U
Authority: CN
Inventors: 高翔; 刘杨
Original assignee: Guangdong PHNIX Eco Energy Solution Ltd
Current assignee: Guangdong PHNIX Eco Energy Solution Ltd
Priority date: 2013-06-03
Filing date: 2013-06-03
Publication date: 2013-11-20
Anticipated expiration: 2023-06-03

Abstract

The utility model discloses a pulse flowmeter and belongs to the field of flowmeters. The pulse flowmeter comprises a shell body provided with a water inlet and a water outlet, an inner cover arranged on the upper edge of the shell body, and an impeller arranged in the shell body and capable of rotating in the direction perpendicular to the water flow direction, wherein the impeller comprises a rotary shaft with two ends embedded into the bottom surface of the shell body and into the inner cover respectively and a plurality of blades evenly arranged outside the rotary shaft, an annular magnet is installed on the rotary shaft above the blades in a sleeved mode, a circuit board provided with a Hall sensor is installed on the inner cover right above the annular magnet, partition boards are arranged on the impeller between each blade and the annular magnet, and a surrounding edge covering the annular magnet is arranged on the upper portion of each partition board. Due to the fact that the partition boards are additionally arranged between each blade and the annular magnet, direction contact between the impeller and the annular magnet is avoided, impurities such as rust in the water flowing through the impeller are prevented from adhering to the annular magnet, scaling, rusting and demagnetization of the annular magnet are avoided, the Hall sensor can generate pulse signals correctly, and then accuracy of detection of the pulse flowmeter is guaranteed.

Description

A kind of pulse flowmeter

Technical field

The utility model relates to a kind of flowmeter, particularly relates to a kind of pulse flowmeter.

Background technology

Pulse flow is counted in pipeline center and is laid an impeller, and the impeller two ends are fixed, and when the pipeline, impeller blades, produce driving moment to impeller when fluid, makes impeller overcome friction square and fluid resistance square and produces rotation.In certain flow range, to certain fluid media (medium) viscosity, the angular velocity of rotation of impeller is directly proportional to rate of flow of fluid.Thus, rate of flow of fluid can obtain by the angular velocity of rotation of impeller, thereby can calculate the fluid flow by pipeline.

The rotating speed of impeller detects by Hall element, in the time of wheel rotation, the magnet on rotating shaft top also and then rotates together, when magnet rotates, the Hall element of pulse flowmeter inside will produce pulse signal, and pulse signal is sent to unit conversion in system controller and flow accumulation circuit and obtains and show the cumulative flow value; Simultaneously also pulse signal is sent to the frequency-current conversion circuit in system controller, converts pulse signal to simulation current flow, and then indication instantaneous delivery value.

But the magnet in present pulse flowmeter directly contacts with impeller, in the time of wheel rotation, the impurity such as iron rust of the water the inside in impeller of being easy to flow through are attached on magnet, thereby cause magnet the phenomenons such as fouling, corrosion to occur, perhaps more serious meeting causes the magnetic of magnet to disappear, so just make Hall element can't or can't correctly produce pulse signal to controller, cause flow detection malfunctioning, or flow detection is inaccurate.

The utility model content

For addressing the above problem, the utility model provides a kind of impeller of avoiding to follow magnet directly to contact, guarantee to detect the pulse flowmeter of correctness.

the technical scheme that its technical matters that solves the utility model adopts is: a kind of pulse flowmeter, comprise the housing that is provided with water inlet and water delivering orifice, be located at the inner cap on edge on housing and be located in housing and can be along the impeller that rotates perpendicular to water (flow) direction, impeller comprises that two ends embed respectively rotating shaft and some blades that evenly is located at the rotating shaft outside of housing bottom surface and inner cap, in rotating shaft, above blade, be set with ring-shaped magnet, inside cover a packaged circuit board that Hall element is arranged is set directly over ring-shaped magnet, on impeller, between each blade and ring-shaped magnet, be provided with dividing plate, the upside of dividing plate is provided with the edge of enclosing that covers ring-shaped magnet.

Be further used as the improvement of technical solutions of the utility model, the housing bottom surface and in cover and be equipped with the slot that rotating shaft is installed, in each slot, be equipped with the ball that holds out against the rotating shaft two ends.

Be further used as the improvement of technical solutions of the utility model, the lower surface of inner cap is provided with annular and dodges groove, encloses along being positioned at annular and dodges groove.

Be further used as the improvement of technical solutions of the utility model, the lower surface of inner cap is provided with the cylindrical groove coaxial with rotating shaft, and ring-shaped magnet is positioned at cylindrical groove.

Be further used as the improvement of technical solutions of the utility model, the center of inner cap upper surface is provided with card convex, and circuit board is provided with the through hole that is sleeved on card convex.

Be further used as the improvement of technical solutions of the utility model, also comprise the enclosing cover that is located at the inner cap upside, the lower surface of enclosing cover is provided with the pressure ring that entangles card convex and compress circuit board.

Be further used as the improvement of technical solutions of the utility model, cover outward or enclosing cover and inner cap between be provided with wire through-hole.

Be further used as the improvement of technical solutions of the utility model, inner cap and enclosing cover by on some screws and housing along being fixedly connected with, between inner cap and enclosing cover, between inner cap and housing, be equipped with O-ring seal.

Be further used as the improvement of technical solutions of the utility model, the height of blade equals the bore of water inlet.

The beneficial effects of the utility model: this pulse flowmeter adds dividing plate between blade and ring-shaped magnet, avoided impeller directly to contact with ring-shaped magnet, the impurity such as iron rust of water the inside of impeller of flowing through so just can not be attached on ring-shaped magnet, ring-shaped magnet just not there will be the even phenomenon such as degaussing of fouling, corrosion, Hall element also can be correct the generation pulse signal, thereby guarantee the detection correctness of pulse flowmeter.

The accompanying drawing explanation

The utility model is described in further detail below in conjunction with accompanying drawing:

Fig. 1 is the utility model embodiment one-piece construction schematic diagram;

Fig. 2 is the utility model embodiment inner structure schematic diagram;

Fig. 3 is the utility model embodiment explosive view.

Embodiment

with reference to Fig. 1～Fig. 3, the utility model provides a kind of pulse flowmeter, comprise the housing 1 that is provided with water inlet 11 and water delivering orifice 10, be located at the inner cap 2 on edge on housing 1 and be located in housing 1 and can be along the impeller 3 that rotates perpendicular to water (flow) direction, impeller 3 comprises that two ends embed respectively rotating shaft 30 and some blades 31 that evenly is located at rotating shaft 30 outsides of housing 1 bottom surface and inner cap 2, in rotating shaft 30, above blade 31, be set with ring-shaped magnet 4, the one packaged circuit board 5 that Hall element 50 is arranged is set on inner cap 2 directly over ring-shaped magnet 4, on impeller 3, at each

blade

31 and 4 of ring-shaped magnets, be provided with dividing plate 32, the upside of dividing plate 32 is provided with and covers the enclosing along 33 of ring-shaped magnet 4.

Water in the system water route is through the water inlet 11 of pulse flowmeter, inner impeller 3 starts to rotate under the impact of water, and then impel the rotating shaft 30 in the middle of impeller 3 to rotate, when rotating shaft 30 is rotated, the ring-shaped magnet 4 on rotating shaft 30 tops also and then rotates together, and when ring-shaped magnet 4 rotated, the Hall element 50 of pulse flowmeter inside will produce pulse signal, system controller, by measuring frequency and the quantity of this pulse signal, is indicated the flow value in water route.

This pulse flowmeter adds dividing plate 32 at

blade

31 and 4 of ring-shaped magnets, avoided impeller 3 directly to contact with ring-shaped magnet 4, the impurity such as iron rust of water the inside of impeller 3 of flowing through so just can not be attached on ring-shaped magnet 4, ring-shaped magnet 4 just not there will be the even phenomenon such as degaussing of fouling, corrosion, Hall element 50 also can be correct the generation pulse signal to controller, thereby guarantee the detection correctness of pulse flowmeter.

As the utility model preferred embodiment, on housing 1 bottom surface and inner cap 2, be equipped with the slot 6 that rotating shaft 30 is installed, in each slot 6, be equipped with the ball 60 that holds out against rotating shaft 30 two ends.

The inner rotating shaft of present pulse flowmeter 30 two ends are to be directly installed in the slot 6 of housing 1 and inner cap 2, when rotating shaft 30 is rotated like this, the resistance of rotating shaft 30 rotations can be very large, if long-term the rotation, can reduce the serviceable life of pulse flowmeter, this pulse flowmeter has all increased ball 60 and has been fixed in the slot 6 of the housing 1 of rotating shaft 30 and inner cap 2, greatly reduced the resistance of rotating shaft 30 rotations, friction while also having reduced rotating shaft 30 rotation, not only guarantee the normal operation of rotating shaft 30, and extended the serviceable life of pulse flowmeter.

As the utility model preferred embodiment, the lower surface of inner cap 2 is provided with annular and dodges groove 20, encloses along 33, to be positioned at annular and to dodge groove 20.

As the utility model preferred embodiment, the lower surface of inner cap 2 is provided with the cylindrical groove 21 coaxial with rotating shaft 30, and ring-shaped magnet 4 is positioned at cylindrical groove 21.

Annular is dodged the setting of groove 20 and cylindrical groove 21; can coordinate and enclose along 33 come together common isolated blade 31 and ring-shaped magnets 4; thereby reach better protection effect; arranging of cylindrical groove 21 shortened the distance of ring-shaped magnet 4 with circuit board 5 simultaneously; be that Hall element 50 reactions are sensitiveer, it is more accurate to measure.

As the utility model preferred embodiment, the center of inner cap 2 upper surfaces is provided with card convex 22, and circuit board 5 is provided with the through hole 51 that is sleeved on card convex 22.

As the utility model preferred embodiment, also comprise the enclosing cover 7 that is located at inner cap 2 upsides, the lower surface of enclosing cover 7 is provided with the pressure ring 71 that entangles card convex 22 and compress circuit board 5.

Enclosing cover 7 be provided for

holding circuit plate

5,5 of circuit boards directly are sleeved on the card convex 22 of inner cap 2 upper surfaces simultaneously, and card convex 22 are pressed on to the upside of inner cap 2 by pressure ring 71, and are easy for installation, save the use of the web members such as screw, cost-saving.

As the utility model preferred embodiment, on enclosing cover 7 or enclosing

cover

7 and 2 of inner caps be provided with wire through-hole 70, wire through-hole 70 is for placing the wire that the signal on circuit board 5 is derived.

As the utility model preferred embodiment, inner cap 2 is fixedly connected with edge on housing 1 by some screws 8 with enclosing

cover

7, and 7 of inner cap 2 and enclosing covers,

inner cap

2 and 1 of housing are equipped with O-ring seal 9.

1 of inner cap 2 and housing arrange O-ring seal 9, avoid water in housing 1 to enter 7 of inner cap 2 and enclosing covers, and 7 of inner cap 2 and enclosing covers arrange O-ring seal 9, avoid outside water to enter 7 of inner cap 2 and enclosing covers, thereby reach the purpose of holding circuit plate 5.

As the utility model preferred embodiment, the height of blade 31 equals the bore of water inlet 11.

The size that is arranged so that impeller 3 and water inlet 11 sizes of large blade 31 are more identical, the water of the internal system impeller 3 of can flowing through completely, and pulse flowmeter part non-resistance, will make the detection of flow more linear and more accurate like this.

Certainly, the invention is not limited to above-mentioned embodiment, those of ordinary skill in the art also can make equivalent variations or replacement under the prerequisite without prejudice to the utility model spirit, the modification that these are equal to or replacement all are included in the application's claim limited range.

Claims

1. pulse flowmeter, it is characterized in that: comprise the housing (1) that is provided with water inlet (11) and water delivering orifice (10), be located at the inner cap (2) on the upper edge of described housing (1) and be located in described housing (1) and can be along the impeller (3) that rotates perpendicular to water (flow) direction, described impeller (3) comprises that two ends embed respectively rotating shaft (30) and some blades (31) that evenly is located at described rotating shaft (30) outside of described housing (1) bottom surface and inner cap (2), described rotating shaft (30) is upper is set with ring-shaped magnet (4) in the top of blade (31), the upper packaged circuit board (5) that Hall element (50) are arranged that arranges directly over ring-shaped magnet (4) of described inner cap (2), described impeller (3) is upper is provided with dividing plate (32) between each blade (31) and ring-shaped magnet (4), the upside of described dividing plate (32) is provided with and covers the enclosing along (33) of described ring-shaped magnet (4).

2. pulse flowmeter according to claim 1, it is characterized in that: on described housing (1) bottom surface and inner cap (2), be equipped with the slot (6) that rotating shaft (30) is installed, in each described slot (6), be equipped with the ball (60) that holds out against rotating shaft (30) two ends.

3. pulse flowmeter according to claim 1 and 2, it is characterized in that: the lower surface of described inner cap (2) is provided with annular and dodges groove (20), and described enclosing is positioned at described annular along (33) and dodges groove (20).

4. pulse flowmeter according to claim 3, it is characterized in that: the lower surface of described inner cap (2) is provided with the cylindrical groove (21) coaxial with rotating shaft (30), and described ring-shaped magnet (4) is positioned at described cylindrical groove (21).

5. pulse flowmeter according to claim 1 and 2, it is characterized in that: the center of described inner cap (2) upper surface is provided with card convex (22), and described circuit board (5) is provided with the through hole (51) that is sleeved on described card convex (22).

6. pulse flowmeter according to claim 5 is characterized in that: also comprise the enclosing cover (7) that is located at inner cap (2) upside, the lower surface of described enclosing cover (7) is provided with the pressure ring (71) that entangles described card convex (22) and compress circuit board (5).

7. pulse flowmeter according to claim 6, is characterized in that: on described enclosing cover (7) or between enclosing cover (7) and inner cap (2), be provided with wire through-hole (70).

8. pulse flowmeter according to claim 7, it is characterized in that: described inner cap (2) and enclosing cover (7) are upper along being fixedly connected with by some screws (8) and housing (1), between described inner cap (2) and enclosing cover (7), between inner cap (2) and housing (1), be equipped with O-ring seal (9).

9. pulse flowmeter according to claim 1 and 2, it is characterized in that: the height of described blade (31) equals the bore of water inlet (11).