CN201983808U

CN201983808U - Improved Woltmann water meter

Info

Publication number: CN201983808U
Application number: CN201020681032XU
Authority: CN
Inventors: 沈兴家
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-12-17
Filing date: 2010-12-17
Publication date: 2011-09-21
Anticipated expiration: 2020-12-17

Abstract

The utility model discloses an improved Woltmann water meter, comprising a housing and a flange cover. The housing is provided with a fluid director, an impeller and an impeller rack. Two sets of adjustable rectifiers are also disposed in the housing with one set being disposed between the fluid director and the impeller and the other set being disposed at the rear end of the impeller rack. The Woltmann water meter is advantageous in that two sets of adjustable rectifiers are added in the housing, and thereby the bearing of the impeller blade is balanced, the flowing of water flow in the housing is more stable, and the metering precision of a water meter is improved; a water retaining rubber ring is arranged at the outer edge of the fluid director, the blade of the impeller is provided with a water discharging hole, the flange of the impeller rack is provided with a V-shaped water retaining annular plate, and the rear end of the impeller is provided with a deceleration impeller, and thereby the stability of water flow is further increased and the metering precision of a water meter is improved.

Description

Modified form screw wing water meter

Technical field:

The utility model relates to the measuring instrument technical field, especially relates to a kind of screw wing water meter that is used for the water measurement amount.

Background technology:

See that Fig. 1 is to shown in Figure 3: existing screw wing water meter has housing 01 and blind flange 02, wherein, be provided with air deflector 03, impeller 04, impeller support 05 in the housing 01, in addition, the interior circular top part of air deflector 03 is provided with trimmer and the connection rod set 06 that is used to regulate the flow size.This screw wing water meter finds that in use there are the following problems: when (1) passes through air deflector 03 when current, because of need are adjusted the flow size, and then make impeller 04 blade single face be subjected to water impact, blade promptly produces discontinuity equalization and swing, influence the stability of current, and long-term unbalanced water impact will make the wearing and tearing of impeller axle cause current steadily not reduce degree of accuracy; (2) when current process air deflector 03,, cause the part current can overflow outside the air deflector 03, cause the metering out of true because of the difference on the structural design; When (3) current are flowed out by impeller support 05 by helical blade, produce spiral parabolical fluid and in housing, cause turbulent flow; (4) its impeller shaft 07 adopts gear on worm kind of drive, needs to adopt the excentric shaft design, and the current that cause circulating can collide transmission shaft, causes the inhomogeneous and accuracy of influence metering of discharge.

The utility model content:

The purpose of this utility model provides a kind of modified form screw wing water meter with regard to being the weak point that exists at prior art, and it has reasonable in design, current equalization stable, measures accurate characteristics.

For achieving the above object, modified form screw wing water meter of the present utility model comprises housing and blind flange, wherein, be provided with air deflector, impeller, impeller support in the housing, in addition, also be provided with two groups of adjustable rectifiers in the housing, wherein one group of adjustable rectifier is between air deflector and impeller, and another is organized adjustable rectifier and is positioned at the impeller back-end support.

Preferred as technique scheme, described adjustable rectifier includes rectifier main body, a plurality of moving vane, adjusts connection rod set, transmission gear, fixed blade, wherein, moving vane and fixed blade are interspersed on the inwall of rectifier main body, and the moving vane that is driven by transmission gear links to each other with the adjustment connection rod set.

Preferred as technique scheme, the described adjustable rectifier front end that is positioned at the impeller back-end support links to each other with the rectification sleeve pipe, and the rectification internal surface of sleeve pipe is provided with fixed blade.

Preferred as technique scheme, described air deflector front end is provided with the water stopping cap of arc, and the air deflector outer rim is equipped with the dash cushion rubber.

Preferred as technique scheme offers osculum on the blade of described impeller, and the impeller front end is provided with the dome chamber.

Preferred as technique scheme, the shirt rim of described impeller support is provided with V-arrangement dash ring flat-plate, and the rear end of impeller support is provided with a plurality of fixed tabs.

Preferred as technique scheme, described impeller rear end is provided with by the moving deceleration impeller of vertical driving cog dribbling.

The beneficial effects of the utility model are: it has set up two groups of adjustable rectifiers in housing, make the impeller blade stress equalization, and current flowing in housing is more stable, has improved the metering precision of water meter.In addition, it also is provided with V-arrangement dash ring flat-plate by offering on osculum, the impeller support shirt rim on the blade that dash cushion rubber, impeller are installed in the air deflector outer rim, the impeller rear end is provided with designs such as deceleration impeller, further increase the stability of current, and improved the measuring accuracy of water meter.

Description of drawings:

Below in conjunction with accompanying drawing the utility model is described further:

Fig. 1 is the one-piece construction synoptic diagram of existing screw wing water meter;

Fig. 2 is the rear view of Fig. 1 middle period wheel support part;

Fig. 3 is the local enlarged diagram at A place among Fig. 1;

Fig. 4 is an one-piece construction synoptic diagram of the present utility model;

Fig. 5 is the local enlarged diagram at B place among Fig. 4;

Fig. 6 is the skeleton view of adjustable rectifier;

Fig. 7 is the structural representation after air deflector and the combination of adjustable rectifier;

Fig. 8 is the decomposing schematic representation of impeller and reduction gearing part;

Fig. 9 is the rear view of impeller among Fig. 8;

Figure 10 is the structural representation after impeller and deceleration impeller and the housing assembling;

Figure 11 is the structural representation of rectification sleeve pipe;

Figure 12 is the structural representation after rectification sleeve pipe and the combination of adjustable rectifier.

Embodiment:

See Fig. 4 and shown in Figure 5: modified form screw wing water meter of the present utility model comprises housing 10 and blind flange 20, wherein, be provided with air deflector 11, impeller 12, impeller support 13 in the housing 10, also be provided with two groups of adjustable rectifiers 30 in the housing 10, wherein one group of adjustable rectifier 30 is between air deflector 11 and impeller 12, and another is organized adjustable rectifier 30 and is positioned at impeller support 13 rear ends.See Fig. 5 and shown in Figure 6: adjustable rectifier 30 includes rectifier main body 31, a plurality of moving vane 32, adjusts connection rod set 33, transmission gear (comprising taper gear and carousel gear) 34, fixed blade 35, wherein, moving vane 32 and fixed blade 35 are interspersed on the inwall of rectifier main body 31, and the moving vane 32 that is driven by transmission gear 34 links to each other with adjustment connection rod set 33.Air deflector 11 front ends are provided with the water stopping cap 111 of arc, and air deflector 11 outer rims are equipped with dash cushion rubber 112.

See that Fig. 8 is to shown in Figure 10: offer osculum 121 on the blade of impeller 12; The shirt rim of impeller support 13 is provided with V-arrangement dash ring flat-plate 131, and the rear end of impeller support 13 is provided with a plurality of fixed tabs 132; Impeller 12 rear ends are provided with the deceleration impeller 52 that is driven by the vertical transmission fluted disc 51 that links to each other with kinematic link 53.In addition, because of flow velocity when slow, current can be penetrated into the blade below of impeller 12, so that flow is omitted outside and the metering out of true, therefore, impeller 12 front ends also are provided with dome chamber 122, like this, the water yield after deceleration impeller 52 is pushed can accumulate in the dome chamber 122, because of it possesses the function that stores the water yield, makes impeller 12 reach better deceleration effect.

See that Figure 11 is with shown in Figure 12: adjustable rectifier 30 front ends of that group that are positioned at impeller support 13 rear ends link to each other with rectification sleeve pipe 40, and rectification sleeve pipe 40 inwalls are provided with fixed blade 41, so that current are more stable.

The utility model is in actual use when current are too fast, the arc water stopping cap 111 of air deflector 11 front ends is with a dash, one side is changed the direction of a stream of water, reduce too fast flow velocity, make current change into the eddy current pattern and impact impeller 12 with the arc surface diffusion, current can directly not impact blade, reduce the pressure that current directly impact blade; After current enter air deflector 11, because of being provided with the fin and the kuppe of lengthening in the air deflector 11, the stability in the time of can strengthening current and enter blade and the circulation of straight line; In addition, after current entered air deflector 11, the dash cushion rubber 112 of air deflector 11 front outers can allow all current enter in the cavity, reached more accurate and exhaustively measured effect.Current are by behind the air deflector 11, and the moving vane 32 of adjustable rectifier 30 can evenly be adjusted the flow size, make the current average plateau by impeller 12 blades, and the blade plane stress equalization makes its rotating speed more steady.When current when being arranged at the V-arrangement dash ring flat-plate 131 on impeller support 13 shirt rims, can produce the counter-rotating current, the counter-rotating current will rush at deceleration impeller 52 with reverse current, make impeller 12 come the speed of its rotating speed of self-poise according to the speed of water velocity, simultaneously, impeller 12 also moves toward the water inlet direction reverse, and impeller 12 is subjected to minimizing to push pressure and reaches the movement axle and do not wear and tear and the accurate purpose of metering.Rotate diffusion and dish out because of the screw wing blade can produce spiral water flow, the current that the fixed tabs 132 that are provided with in the impeller support 13 are dished out the spiral diffusion change stability line and fluid in the same way into, and are more steady when allowing flow.Current are by behind the impeller support 13, current can produce adverse current toward impacting up and down, for this reason, be provided with rectification sleeve pipe 40 in impeller support 13 rear ends and organize adjustable rectifier 30 with another, after current were by impeller support 13 and rectification sleeve pipe 40, flow will be by more stable, simultaneously, this is organized adjustable rectifier 30 and also has the function of adjusting water yield size concurrently, makes the metering of water meter more accurate.

In addition, therefore its transmission shaft of Qian screw wing water meter adopts the gear on worm kind of drive, need be designed to excentric shaft, and the current that cause circulating can collide transmission shaft and cause the flow disorder in cavity, reduce the accuracy of metering.For overcoming this problem, the utility model makes transmission shaft into the right angle transmission in the 13 positive central point transmissions of impeller support.

The above only is preferred embodiment of the present utility model, does not therefore limit protection domain of the present utility model, and every equalization of doing according to the utility model changes with modifying and all belongs in the claim that the utility model contains.

Claims

1. modified form screw wing water meter, comprise housing (10) and blind flange (20), wherein, be provided with air deflector (11), impeller (12), impeller support (13) in the housing (10), it is characterized in that: also be provided with two groups of adjustable rectifiers (30) in the housing (10), wherein one group of adjustable rectifier (30) is positioned between air deflector (11) and the impeller (12), and another is organized adjustable rectifier (30) and is positioned at impeller support (13) rear end.

2. modified form screw wing water meter according to claim 1, it is characterized in that: described adjustable rectifier (30) includes rectifier main body (31), a plurality of moving vane (32), adjusts connection rod set (33), transmission gear (34), fixed blade (35), wherein, moving vane (32) and fixed blade (35) are interspersed on the inwall of rectifier main body (31), and the moving vane (32) that is driven by transmission gear (34) links to each other with adjustment connection rod set (33).

3. modified form screw wing water meter according to claim 2 is characterized in that: described adjustable rectifier (30) front end that is positioned at impeller support (13) rear end links to each other with rectification sleeve pipe (40), and rectification sleeve pipe (40) inwall is provided with fixed blade (41).

4. modified form screw wing water meter according to claim 3 is characterized in that: described air deflector (11) front end is provided with the water stopping cap (111) of arc, and air deflector (11) outer rim is equipped with dash cushion rubber (112).

5. modified form screw wing water meter according to claim 4 is characterized in that: offer osculum (121) on the blade of described impeller (12), impeller (12) front end is provided with dome chamber (122).

6. modified form screw wing water meter according to claim 5 is characterized in that: the shirt rim of described impeller support (13) is provided with V-arrangement dash ring flat-plate (131), and the rear end of impeller support (13) is provided with a plurality of fixed tabs (132).

7. modified form screw wing water meter according to claim 6 is characterized in that: described impeller (12) rear end is provided with the deceleration impeller (52) that is driven by vertical transmission fluted disc (51).