CN2387515Y - High precision positive piston flowmeter - Google Patents

Abstract

The utility model relates to a volume type piston meter. The utility model is mainly composed of a housing system, a water chamber body system, and a counter system, wherein, a piston is positioned in a water chamber body, and a deflector rod on the circle center of the piston is coupled with a rotating output arm and a rotating shifting fork which are arranged on the circle collecting position of the cover of a water chamber; the shifting fork is coupled with a T-shaped convex shaft in the counter system; the counter system which is an eight-bit byte wheel type counter system is composed of a reduction gear assembly and a counter assembly, and the reduction gear assembly and a counter assembly can be detachable. Compared with the present rotating wing type water meter, the utility model has the advantages of high metering precision, stable performance, long service life, simple structure, visual reading, installation in free directions, flow prevention in an opposite direction, etc.

Description

High precision positive displacement piston meter

The utility model belongs to the flow metering field of working fluid, particularly relates to a kind of high precision positive displacement piston meter.

A large amount of at present water meters that use all are rotor water gauges, and the indicating value of discharge is shown by pointer.Such water meter part that comes with some shortcomings: the slip-stream amount of (1) water meter is bigger, and measuring accuracy is lower, especially the accurate metering of incompatibility low discharge current; (2) complex structure, volume is bigger, and weight is heavier; (3) reading is not directly perceived; (4) water meter can only level be installed on waterway pipe, has limited its mounting means and position greatly; (5) shell of rotor water gauge adopts copper material usually, and cost increases; (6) the common only valve that returns that does not prevent the current reversed flow in the water meter.

The purpose that the present utility model is created is to overcome above-mentioned the deficiencies in the prior art, a kind of measuring accuracy height is provided, indicating value is accurate, reading is very directly perceived, and long service life is simple in structure, volume is little, in light weight, but the arbitrary orientation installation, and be provided with the positive displacement piston meter that ends valve that returns that prevents the current reversed flow.

The purpose of this utility model is achieved through the following technical solutions: this volumeter mainly is made of upper shell, lower house, hydroecium system sum counter system, be provided with the hydroecium system in the water meter lower house, this system is by hydroecium body, piston, dividing plate, water box cover, driving lever, output arm, shift fork, O-ring seal, filter screen, pressure ring and return and end valve and constitute, described piston is positioned at the hydroecium body, rotating output arm, the shift fork of the driving lever of piston circle centre position and water box cover circle centre position are coupled, and the protruding axle of the T shape in shift fork and the counter system is of coupled connections.In the water meter upper shell, be provided with counter system, this system is that a number of significant figures is nine a character wheel formula counter system, it is assembled by reduction gearing assembly sum counter assembly, detachable between two assemblies, described reduction gearing assembly is made of gear mount support, the protruding axle of T shape, worm screw, 1# composite gear, 2# composite gear; Described counter assembly is made of counter housing, housing flap, spiral gear, number harbour wheel, seven digital wheels, seven carry handsetting gears, digital wheel bracket cover, final drive shaft assembly, display piece, O-ring seal, seal rubber sleeve and sealing gaskets.

Below in conjunction with embodiment and accompanying drawing thereof the utility model is described in further detail.

The general structure synoptic diagram of the positive displacement piston meter that Fig. 1 provides for the utility model embodiment.

Fig. 2 is the utility model hydroecium system structural representation.

Fig. 3 is the A-A cut-open view of Fig. 2.

Fig. 4 is the front view of the utility model piston.

Fig. 5 is the B-B cut-open view of Fig. 4.

Fig. 6 is the vertical view of Fig. 4.

Fig. 7 is the utility model character wheel formula counter system master TV structure synoptic diagram.

Fig. 8 is that the D of Fig. 7 is to view.

Fig. 9 is the C-C cut-open view of Fig. 8.

Figure 10 is the utility model reduction gearing assembly master TV structure synoptic diagram.

Figure 11 is the vertical view of Figure 10.

Referring to accompanying drawing.The positive displacement piston meter that the utility model embodiment provides is made of watchcase system 100, hydroecium system 300, character wheel formula counter system 200 3 big systems.Described watchcase system comprises upper shell 103 that is provided with water delivering orifice 106 and the lower house 104 that is provided with water inlet 107, and the upper and lower casing screw threads for fastening connects, and prevents that by means of O-ring seal 303 connection of thread from leaking.Last watchcase 103 fronts have a scuttle 102 of observing meter reading to be covered with counter.Scuttle 102 is by flexibly connecting between bearing pin 105 and the upper shell 103.On the water delivering orifice 106 of upper shell 103, be stamped a dust cap 101.

Hydroecium system 300 comprises hydroecium body 304, piston 305, water box cover 302, dividing plate 308, filter screen 309, pressure ring 310, returns parts such as ending valve 311, O-ring seal 303.The hydroecium inlet 321 that the one and a half months thread form is arranged in the outer, bottom of hydroecium body 304 has hydroecium central shaft 320 and hydroecium center ring 319 in the bottom centre of hydroecium body 304.In the middle of piston 305 is butterfly spoke 316, and the outside is a tubular wheel rim 317.On piston dish spoke 316, have piston swing curve groove 312 and a plurality of permeable circular hole 313, on tubular wheel rim 317, have an axial Tiaokou 318, the exit of piston swing curve groove 312 has four waist shape permeable hole 314 (see figure 6)s of symmetry on axial Tiaokou 318 both sides on axial Tiaokou 318.Circle centre position has metal output driving lever 306 on piston dish spoke 316, and dish-shaped spoke 316 following circle centre positions have piston middle spindle 315.The water box cover center ring 323 that stretches in the hydroecium body 304 is arranged at water box cover 302 bottoms, and its size is consistent with hydroecium center ring 319.At the circle centre position of water box cover center ring 323, be provided with a rotating output arm 307, the part that water box cover 302 outsides are stretched out in the upper end of output arm 307 main shafts is an output shift fork 301, is the affixed one that is assembled between output arm 307 and the shift fork 301.Have one and a half months thread form hydroecium outlet 322 at water box cover 302 near garden circumferential edges place, it is 321 consistent that its shape, size and hydroecium enter the mouth.

The assembled state and the operating condition of hydroecium system 300 are as follows: piston 305 is positioned in the middle of the hydroecium body 304, one rectangular mouthful along axially respectively having on hydroecium center ring 319 outer walls and hydroecium body 304 inwalls, two rectangular mouths are respectively perpendicular to the straight line of hydroecium body bottom half moon hydroecium inlet 321.Dividing plate 308 along the axis of the piston to Tiaokou 318 by above-mentioned two rectangular mouthful insertion hydroecium bodies 304 in, hydroecium separated be two parts in inflow side and outflow side, and the movement locus of piston 305 is limited.Water box cover 302 spiral-locks make hydroecium outlet 322 and the hydroecium inlet 321 staggered dividing plate plane that is symmetrical in one on the other when the hydroecium body 304, and by the upper end of dividing plate 308 to water box cover 302 location.When user mode, be symmetrical in the dividing plate plane because hydroecium inlet 321 and hydroecium outlet 322 are staggered, dividing plate 308 separates into inflow side and outflow side to hydroecium inlet 321 with hydroecium outlet 322, drive lower piston 305 at current and be defined, can only rotate simultaneously around the track that hydroecium central shaft 320 and dividing plate 308 demifacets are limited and swing because of its movement locus.Like this, 305 motions of current driven plunger, output driving lever 306 by heart place, piston garden drives rotating output arm 307 and the shift fork 301 that is arranged on heart place, water box cover 302 garden, and be of coupled connections by means of shift fork 301 and the protruding axle 212 of T shape in the counter system, finish of the metering transmission of the volumometer value of the working fluid in the hydroecium system to counter system.Piston 305 is owing to be subjected to the effect of hydrodynamic pressure, the swing that rotates simultaneously, and along with fluid flows into from hydroecium inlet 321, piston 305 continues the pressurizeds rotation, the fluid that is full of piston 305 outflow sides has been flowed through hydroecium outlet 322 go out.Like this, piston 305 is rotatablely moving of continuously rotating, swing, the fluid that is full of in the hydroecium is delivered to the outflow side from the inflow side, just as the measurement that is filled with water again and again with measuring cup, number of revolutions by means of piston middle spindle 315, output driving lever 306, measure the fluid volumes that flows through in the hydroecium, and show its reading, thereby realized the accurate measurement of fluid by eight bit word wheel type counter system.

Piston 305 has position, two places to belong to " dead angle " position in hydroecium body 304, and piston position for example shown in Figure 3 promptly is a kind of in two kinds of " dead angle " states.The unimpeded of fluid flows when being in " dead angle " position in order to ensure piston 305, the utility model the axis of the piston to Tiaokou 318 and symmetria bilateralis have a waist shape permeable hole 314 (referring to Fig. 6) of four identical sizes, when piston 305 was in " dead angle " state shown in Figure 6, waist shape permeable hole 314 was that fluid flows to the inlet opening in the piston; When piston 305 is in the hydroecium another " dead angle " state (when piston 305 is in lower position among Fig. 6), the apopore of waist shape permeable hole 314 to be fluids flow in piston hydroecium.Just because of axial Tiaokou 318 symmetria bilateralis on piston tubular wheel rim 317 have four waist shape permeable holes 314, guaranteed ideally that just the unimpeded of fluid flows.

Be provided with counter system 200 in water meter upper shell 103, this counter system is that a number of significant figures is nine a character wheel formula counter system, and it is assembled by reduction gearing assembly sum counter assembly, and is detachable between two assemblies.Described reduction gearing assembly is made of gear mount support 213, the protruding axle 212 of T shape, worm screw 216,1# composite gear 214,2# composite gear 215; Described counter assembly is made of counter housing 202, housing flap 203, spiral gear (worm gear) 206,209, seven digital wheels of number harbour wheel 207, seven carry handsetting gears 208, digital wheel bracket cover 210, final drive shaft assembly 211, display piece 204, O-ring seal 205, seal rubber sleeve 218 and sealing gaskets 201.

The architectural feature and the motion state of each assembly of counter system 200 are as follows: in the reduction gearing assembly, between the protruding axle of described T shape 212 and the worm screw 216 is an integral body of fixedlying connected that assembles, the protruding axle 212 of T shape stretches out gear mount support 213 outsides, with the output terminal in the hydroecium system---and shift fork 301 is of coupled connections; Described worm screw 216 is four-head worm screws, the worm gear coupling of it and 1# composite gear 214 lower ends, the gear of 1# composite gear 214 upper ends again with the gears of 2# composite gear 215 lower ends; The output terminal of described 2# composite gear (upper end) is a four-head worm screw, and the spiral gear (worm gear) 206 in it and the counter assembly is of coupled connections.Just because of the well-designed reducing gear of two pairs of four-head worms and wormwheels, the sensitivity that has just improved counter system 200 realizes that for counter system road has been paved in the high-precision flow metering of nine position effective digitals.In the counter assembly, digital great wheel 209, seven digital wheels 207 all are assembled in the counter housing 202 by final drive shaft assembly 211, and the other end of final drive shaft assembly 211 stretches out outside the counter housing flap 203 and with spiral gear 206 and is connected with fixed.Like this, the rotational angular velocity of digital great wheel 209 is fully consistent with the rotational angular velocity of spiral gear 206, thereby has realized the high sensitivity of counter system.In the counter assembly, be outside the fixing assembling, all to be slidable fit between all the other seven carry handsetting gears 208 and its handsetting gear axle 220 between the turning wheel of divisor harbour wheel 209 and the final drive shaft.Seven digital wheels 207, number harbours are taken turns interlaced engagement between 209 and seven carry handsetting gears 208, finish the conversion and the progression of tens digit according to the rotating ratio of setting.

The assembling work of counter assembly is as follows: the outside that earlier a digital wheel 207 is sleeved on digital wheel mount support 219, again a carry handsetting gear 208 is loaded into from carry handsetting gear axle 220 covers on the mount support 219, and carry handsetting gear 208 and digital wheel 207 are meshing with each other, successively six digital wheels 207,209 and six carry handsetting gears 208 of number harbour wheel of remainder are set with successively on mount support 219 and the handsetting gear axle 220, and intermesh according to above-mentioned order then.Digital wheel bracket cover 210 from digital great wheel 209 these end spiral-locks to digital wheel mount support 219,207,209 and seven carry handsetting gears 208 of eight digital wheels are positioned on the digital wheel mount support 219, can not skid off and.The final drive shaft of final drive shaft assembly 211 center pit from digital wheel bracket cover 210 is passed, and wear out from the center chassis hole of digital wheel mount support 219.To indicate the initial groove of reading, radix point and M ³The display piece 204 of mark is inserted in the pre-designed seam cave of counter housing 202, in the counter housing 202 of the more above-mentioned digital wheel assembly that has assembled being packed into.Put seal rubber sleeve 218 in counter assembly lower end, and tighten, when operation, get rid of the usefulness of gas with snap ring 217.In counter housing 202, be full of the liquid juice of desiring metering liquid, for example, when flowmeter is done the water meter use, then in counter housing 202, be full of pure water.Buckle counter housing flap 203, and make between housing flap 203 and the counter housing 202 and seal it.O-ring seal 205 is packed in the default center pit of counter housing flap 203, the top of spiral gear 206 from final drive shaft pressed fit on the final drive shaft again, making becomes friction tight fixedly connectedly between the two, and tightly suppresses O-ring seal 205.Like this, just finished the assembling of counter assembly.Again counter assembly and the reduction gearing assembly that has assembled are fitted together (note, can dismantle), just finished the assembling of the whole counter system 200 of the utility model.

Undertaken by following order during the general assembly of positive displacement piston meter.To return valve 311 only earlier and pack in the water inlet 107 of lower house 104, the hydroecium body 304 that will set up filter screen 309, O-ring seal 303 and pressure ring 310 is more packed in the lower house 104.Desired location in hydroecium body 304 (rectangular mouthful of two in the aforementioned hydroecium body 304) inserts dividing plate 308, the more axial Tiaokou 318 in piston swing curve groove 312 exits is aimed at dividing plate 308 piston 305 is put into hydroecium body 304.At the position of counter housing 202 observed number code wheels 207,209 9 bit digital, be a cylinder boss 221 with magnifier effect.Sealing gasket 201 is enclosed within on this cylinder boss 221, again whole counter system 200 is packed in the upper shell 103, cylinder boss 221 is just packed in the window of upper shell,, use special-purpose positioning component that counter system 200 is fixed in the upper shell 103 then by means of small tools such as clamps.At last, the upper shell 103 that has installed counter system 200 is threaded with the lower house 104 that has installed hydroecium system 300.By means of O-ring seal 303, tighten being threaded between upper shell 103 and the lower house 104, realized the sealing between the upper and lower casing.On water delivering orifice 106, cover dust cap 101, thereby finish the general assembly of whole high precision positive displacement piston meter.

Need to specify a bit, it is the metering that the utility model high precision positive displacement piston meter not only is applicable to the tap water flow, need only make corresponding appropriate change to the material of the relevant parts of hydroecium system sum counter system, go for the metering of the less fluid of other glutinousness equally, for example, be used for metering to fluids such as gasoline, kerosene, beverages.This also should belong within the protection domain of the present utility model creation.

The very wide rotor water gauge of the relatively more existing application of the utility model has following advantage: (1) is highly sensitive, metering The precision height is specially adapted to the accurate-metering of low discharge, uses as the minimum discharge water meter, and its accuracy can reach country's mark C level metering classification standard among the accurate GB/T778-1996; (2) relatively simple for structure, volume is little, and is in light weight; (3) Reading is very directly perceived, eye-catching, not soaked by incrustation scale and pollution, can keep nonvolatil definition; (4) at waterway pipe On can arbitrary orientation install; (5) saved expensive copper material; (6) only valve is arranged back, can prevent the negative side of current To flowing; (7) long service life is used more than 10 years at least.

Claims (3)

1, a kind of positive displacement piston meter mainly is made of upper shell 103, lower casing 104, hydroecium system 300 sum counter systems 200, it is characterized in that:

(1) is provided with hydroecium system 300 in the water meter lower house 104, this system 300 is by hydroecium body 304, piston 305, dividing plate 308, water box cover 302, driving lever 306, output arm 307, shift fork 301, O-ring seal 303, filter screen 307, pressure ring 310 and return and end valve 311 and constitute, described piston 305 is positioned at hydroecium body 304, the driving lever 306 at heart place, piston 305 garden is coupled with rotating output arm 307, the shift fork 301 at heart place, water box cover 302 garden, and the protruding axle 212 of the T shape in shift fork 301 and the counter system 200 is of coupled connections;

(2) be provided with counter system 200 in the water meter upper shell 103, this counter system is that a number of significant figures is nine a character wheel formula counter system, it is assembled by reduction gearing assembly sum counter assembly, detachable between two assemblies, described reduction gearing assembly is made of gear mount support 213, the protruding axle 212 of T shape, worm screw 216,1# composite gear 214,2# composite gear 215; Described counter assembly is made of counter housing 202, housing flap 203, spiral gear 206, digital great wheel 209, seven digital wheels 207, seven carry handsetting gears 208, digital wheel bracket cover 210, final drive shaft assembly 211, display piece 204, O-ring seal 205, seal rubber sleeve 218 and sealing gaskets 201.

2, positive displacement piston meter according to claim 1, it is characterized in that in the middle of the said piston 305 be dish-shaped spoke 316, the outside is a tubular wheel rim 317, on dish-shaped spoke 316, have piston swing curve groove 312 and several holes, permeable garden 313, on tubular wheel rim 317, have an axial Tiaokou 318, the exit of swing curve groove 312 has four waist shape permeable holes 314 of symmetry on axial Tiaokou 318 both sides on axial Tiaokou 318.

3, positive displacement piston meter according to claim 1, the output terminal that it is characterized in that the 2# composite gear 215 in the said reduction gearing assembly is a four-head worm screw, be coupled with the spiral gear 206 of counter assembly, said worm screw 216 is four-head worm screws, be coupled with the spiral gear of 1# composite gear 214, the input end of worm screw 216 is the protruding axle 212 of T shape, is fixedly connected therebetween.

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