CN2438103Y - Magnetic coupling dry type water meter - Google Patents

Abstract

The utility model relates to a magnetic coupling dry type water meter. The utility model is put forward for providing flux measuring equipment for a water supply pipeline, which has the advantages of small moment of inertia, accurate reading, small volume, and low total height. The magnetic coupling dry type water meter comprises a body, a magnetic coupling mechanism, a driving counting mechanism, and a reading disc; the body comprises a water meter casing, an impeller box which is assembled on the water meter casing, an impeller bearing rack, a sealed casing, an upper clamping plate, and a lower clamping plate; the magnetic coupling mechanism comprises an impeller, a central shaft which is used for fixing a centre gear, an upper semi-shaft of the impeller, a lower semi-shaft of the impeller, an active disk, and a passive disk; the central shaft is rotationally arranged on the upper clamping plate and the lower clamping plate by the upper end and the lower end of the central shaft; the passive disk and the active disk are respectively fixed on the central shaft, the bottom and the top of the upper semi-shaft of the impeller.

Description

The magnetic coupling dry-type meter

The utility model belongs to feedwater piping flow metering equipment, particularly a kind of magnetic coupling dry-type meter.

As shown in Figure 1, the magnetic coupling mechanism of the dry-type meter of the use of domestic production at present comprises that one is convexly set in bearing seat 2a, the central shaft 3a that sets firmly central gear 31a, the impeller shaft 4a that sets firmly impeller 41a, ferromagnetism Jiong shape bar 5a and the disk 6a on the housing seal dividing plate 1a.Bearing seat 2a upper and lower group is provided with upper and lower bearing 21a, 22a.Ferromagnetism Jiong shape bar 5a and disk 6a are fixedly arranged on the top section of section and impeller shaft 4a at the bottom of the central shaft 3a respectively, and central shaft 3a and impeller shaft 4a are mounted on upper and lower bearing 21a, the 22a of bearing seat 2a with its end, top respectively, and order door shape bar 5a is relative with disk 6a.Have the dry-type meter of this magnetic coupling mechanism, though its measuring accuracy is higher, its overall height and volume are bigger.For reducing volume, reducing its overall height, disclose the magnetic coupling mechanism of dry-type meter as shown in Figure 2, it comprises upper and lower bearing 13b, the 14b that is mounted on respectively in housing seal dividing plate 1b upper and lower flange 11b, the 12b, the central shaft 2b that sets firmly central gear 21b, the impeller shaft 3b that sets firmly impeller 31b, passive magnet ring 4b and active magnet ring 5b.Passive magnet ring 4b and active magnet ring 5b are fixedly arranged on the end section of central shaft 2b and the top section of impeller shaft 3b respectively, central shaft 2b and impeller shaft 3b are mounted on upper and lower bearing 13b, the 14b with its end, top respectively, make the big quilt of diameter, active magnet ring 4b, 5b relatively also be placed on respectively outside the upper and lower flange 11b of dividing plate 1b, the 12b.Dry-type meter with this magnetic coupling mechanism, though reduced its overall height by the quilt, active magnet ring 4b, the 5b that are placed on outside upper and lower flange 11b, the 12b, but because square being directly proportional of the moment of inertia of circular rigid body and its diameter, be that the big quilt of diameter, active disk 4b, 5b have bigger moment of inertia, therefore, its error is bigger.

The purpose of this utility model provides that a kind of moment of inertia is little, accuracy of reading, volume is little, overall height is low magnetic coupling dry-type meter.

The utility model comprises body, magnetic coupling mechanism, transmission counting mechanism and reading dial; Body comprises water meter case and is mounted on impeller box, seal casinghousing, water gage glass and cover cap on it; It is characterized in that described impeller box openend group establishes the impeller shaft bolster that bearing is housed; Group is established the upper and lower clamping plate that upper and lower bearing is housed respectively in the seal casinghousing; Magnetic coupling mechanism comprise impeller, middle part set firmly the central shaft of central gear, the upper and lower semiaxis of impeller and master, by movable magnetic disc; Impeller center upper and lower end is respectively equipped with tapped blind hole and blind hole; The semiaxis bottom is provided with the external thread that screws togather with the impeller tapped blind hole on the impeller; Under the impeller semiaxis bottom be provided with the impeller box base plate on the external thread that is spirally connected of screw; Central shaft rotates with its upper and lower end and is installed on the upper and lower bearing of upper and lower clamping plate, semiaxis is mounted on the bearing of impeller shaft bolster with its middle part on the impeller, by, initiatively disk be fixedly arranged on central shaft, the impeller at the bottom of the semiaxis respectively, the top, impeller is loaded on the impeller on the semiaxis lower external thread with its tapped blind hole spiral shell, under the impeller semiaxis with its external thread bolt connection in impeller box base plate screw.

Wherein:

Be arranged with the corundum surface bearing on the central shaft between magnetic coupling mechanism central gear and the lower bearing.

Seal casinghousing base top, bottom surface are respectively equipped with and are installed with by, the upper and lower depression of disk initiatively.

Because the utility model comprises body, magnetic coupling mechanism, transmission counting mechanism and reading dial; Body comprise water meter case and be mounted on impeller box on it, be equipped with bearing impeller shaft bolster, seal casinghousing, upper and lower clamping plate, water gage glass and the cover cap of upper and lower bearing are housed; Magnetic coupling mechanism comprise upper and lower end be provided with the impeller of tapped blind hole and blind hole, set firmly the upper and lower semiaxis of central shaft, impeller of central gear and master, by movable magnetic disc; The upper and lower semiaxis of impeller bottom is respectively equipped with external thread; Central shaft rotates with its upper and lower end and is installed on the upper and lower bearing of upper and lower clamping plate, semiaxis is mounted on the bearing of impeller shaft bolster with its middle part on the impeller, by, initiatively disk be fixedly arranged on central shaft, the impeller at the bottom of the semiaxis respectively, the top, impeller is loaded on the impeller on the semiaxis lower external thread with its tapped blind hole spiral shell, under the impeller semiaxis with its external thread bolt connection in impeller box base plate screw.Be fixedly arranged on the quilt on semiaxis top on central shaft bottom and the impeller respectively, initiatively have minimum distance between the disk, therefore form maximum moment of magnetic couple by two couples of N, the S utmost point on it; During running, the impeller that is arranged in impeller box is subjected to the percussive action of current and rotates with certain angular velocity, the active disk that drive is fixedly arranged on semiaxis top on the impeller rotates, and drive by master, the moment of magnetic couple that formed between the movable magnetic disc and to be fixedly arranged on the central shaft bottom and to be rotated synchronously by movable magnetic disc, central shaft and also cog rotates thereupon synchronously, and drives the reading dial counting by gear through the transmission counting mechanism; Not only moment of inertia is little, accuracy of reading, and volume is little, overall height is low, thereby reaches the purpose of this utility model.

Fig. 1, dry-type meter magnetic coupling mechanism structure schematic sectional view (tool ferromagnetism Jiong shape bar) for commonly using.

Fig. 2, dry-type meter magnetic coupling mechanism structure schematic sectional view (tool quilt, active magnet ring) for commonly using.

Fig. 3, be the utility model structural representation cut-open view.

Fig. 4, be the utility model structural representation vertical view.

Below in conjunction with accompanying drawing the utility model is further elaborated.

As shown in Figure 3, Figure 4, the utility model comprises body 1, magnetic coupling mechanism 2, transmission counting mechanism 3 and reading dial 4.

Body 1 comprises water meter case 11, impeller box 12, impeller shaft bolster 13, seal casinghousing 14, train wheel bridge 15, lower plate 16, water gage glass 17 and cover cap 18.

Water meter case 11 is provided with external thread for being provided with the housing towards upper shed in the openend periphery, and its middle part is provided with the dividing plate 113 that constitutes upper and lower room 111,112, and dividing plate 113 is provided with the through hole 114 that is communicated with upper and lower room 111,112; Upper and lower room 111,112 respectively with go out, import 115,116 is in communication with the outside.

Impeller box 12 is for being provided with the housing towards upper shed, and tangential apopore 121 of number and inlet opening 122 are all established in its perisporium upper and lower part, and its base plate center is provided with screw 123.

Group is provided with bearing 131 on the impeller shaft bolster 13.

Seal casinghousing 14 is for being provided with the housing towards upper shed, and its periphery is corresponding with water meter case 11 openings and place in the opening, and its top periphery extends ends edge 141, and its base top, bottom surface are respectively equipped with upper and lower depression 142,143.

In upper and lower clamping plate 15,16 peripheries and the seal casinghousing 14 week corresponding and be mounted in the seal casinghousing 14, on it respectively group be provided with upper and lower bearing 151,161.

Cover cap 18 is for being provided with the ring cowling body of and the internal thread that be spirally connected corresponding with water meter case 11 external threads.

Impeller box 12 is mounted in the through hole 114 of water meter case 11 dividing plates 113 with its middle part, and makes in the upper and lower room 111,112 that its upper and lower part goes out, inlet opening 121,122 lays respectively at water meter case 11; Impeller shaft bolster 13 is mounted on impeller box 12 opening parts; Seal casinghousing 14 is mounted in water meter case 11 openings, it ends between edge 141 and water meter case 11 open ends and is provided with O-ring seal 142, the base plate of seal casinghousing 11 and impeller box 12 open ends and impeller shaft bolster 13 offset, cover cap 18 spiral shells are loaded on water meter case 11 openends, and water gage glass 17 is mounted on it and seal casinghousing 14 ends between the edge 141.

Magnetic coupling mechanism 2 comprises that impeller 21, middle part set firmly the central shaft 23 of central gear 22, set firmly on the impeller of impeller 21 semiaxis 25 under semiaxis 24, the impeller, disk 26 and by movable magnetic disc 27 initiatively.

Impeller 21 center upper and lower ends are respectively equipped with tapped blind hole 211 and organize the central blind hole 213 that is provided with taper agate bearing 212.

Semiaxis 24 bottoms are provided with the external thread 241 that screws togather with impeller 21 tapped blind holes 211 on the impeller.

Semiaxis 25 tops are provided with the top 251 of and contact corresponding with taper agate bearing 212 under the impeller, its underpart be provided with impeller box 12 base plates on the external thread 252 that is spirally connected of screw 123.

Main, be and the magnetic plate of seal casinghousing 14 base top, upper and lower depression 142, the 143 corresponding radial magnetizings in bottom surface that it radially is respectively equipped with a pair of N, the S utmost point by movable magnetic disc 26,27.

Central shaft 23 rotates with its upper and lower end and is installed on the upper and lower bearing 151,161 of upper and lower clamping plate 15,16, and is arranged with corundum surface bearing 231 on the central shaft 23 between central gear 22 and the lower bearing 161; Be fixed at central shaft 23 bottoms by movable magnetic disc 27, and be positioned at the last depression 142 of seal casinghousing 14 base plates; Semiaxis 24 is mounted on the bearing 131 of impeller shaft bolster 13 with its middle part on the impeller, initiatively disk 26 is fixed at semiaxis 24 tops on the impeller, and be positioned at the following depression 143 of seal casinghousing 14 base plates, impeller 21 is loaded on the impeller on semiaxis 24 lower external thread 241 with its upper end tapped blind hole 211 spiral shells, and by nut 242 lockings; Semiaxis 25 is bolted in the impeller box 12 base plate screws 123 with its underpart external thread 252 under the impeller, and by nut 253 locking, and its top top 251 is resisted against on the taper agate bearing 212 in the impeller 21 lower end central blind holes 213.

Transmission counting mechanism 3 is connected with between magnetic coupling mechanism 2 central gears 22 and reading dial 4.

Be fixedly arranged on the quilt on semiaxis 24 tops on central shaft 23 bottoms and the impeller respectively, initiatively have minimum distance between the disk 27,26, therefore form maximum moment of magnetic couple by two couples of N, the S utmost point on it.

During running, the impeller 21 that is arranged in impeller box 12 is subjected to the percussive action of current and rotates with certain angular velocity, the active disk 27 that drive is fixedly arranged on semiaxis 25 tops on the impeller rotates, and drive by the master, by the moment of magnetic couple that forms between the movable magnetic disc 26,27 and to be fixedly arranged on central shaft 23 bottoms and to be rotated synchronously by movable magnetic disc 27, central shaft 23 and last central gear 22 thereof also rotate thereupon synchronously, and drive reading dials 4 countings by central gear 22 through transmission counting mechanism 3.

Claims (3)

1, a kind of magnetic coupling dry-type meter, it comprises body, magnetic coupling mechanism, transmission counting mechanism and reading dial; Body comprises water meter case and is mounted on impeller box, seal casinghousing, water gage glass and cover cap on it; It is characterized in that described impeller box openend group establishes the impeller shaft bolster that bearing is housed; Group is established the upper and lower clamping plate that upper and lower bearing is housed respectively in the seal casinghousing; Magnetic coupling mechanism comprise impeller, middle part set firmly the central shaft of central gear, the upper and lower semiaxis of impeller and master, by movable magnetic disc; Impeller center upper and lower end is respectively equipped with tapped blind hole and blind hole; The semiaxis bottom is provided with the external thread that screws togather with the impeller tapped blind hole on the impeller; Under the impeller semiaxis bottom be provided with the impeller box base plate on the external thread that is spirally connected of screw; Central shaft rotates with its upper and lower end and is installed on the upper and lower bearing of upper and lower clamping plate, semiaxis is mounted on the bearing of impeller shaft bolster with its middle part on the impeller, by, initiatively disk be fixedly arranged on central shaft, the impeller at the bottom of the semiaxis respectively, the top, impeller is loaded on the impeller on the semiaxis lower external thread with its tapped blind hole spiral shell, under the impeller semiaxis with its external thread bolt connection in impeller box base plate screw.

2, magnetic coupling dry-type meter according to claim 1 is characterized in that being arranged with the corundum surface bearing on the central shaft between described magnetic coupling mechanism's central gear and the lower bearing.

3, magnetic coupling dry-type meter according to claim 1 is characterized in that described seal casinghousing base top, bottom surface are respectively equipped with to be installed with by, the upper and lower depression of disk initiatively.

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