CN2284952Y - Piezometer with memory function - Google Patents

Abstract

The utility model relates to a pressure-measuring instrument with a zero-setting device. The pressure-measuring instrument with memory function is characterized in that a connecting rod 15 is provided with a slot hole and one end of a fan-shaped gear 13 is provided with a rivet which can slide inside the slot hole; a spring piece seat 10 with a three-leg shape is arranged inside a machine core and at the lower end of a gear 14 at a central shaft and is supported at a lower holding plate 9 of the machine core; the zero-setting device to push the fan-shaped gear to a starting point is arranged near the fan-shaped gear 13. The pressure-measuring instrument has the advantages of memory and zero-setting function, different gas operated devices installation and wide application, and can measure pressure values for different targets, such as airplane tires or automobile tires.

Description

Band memory pressure gauge

The utility model relates to the instrument of gaging pressure, relates in particular to the instrument of the gaging pressure with balancing controls.

Existing common pressure gauge is mainly by wireway, support, and bourdon tube, the sealing chieftain, connecting rod, movement, pointer, dial plate and watchcase are formed.Movement is by sector gear, the central shaft gear, and hairspring, last lower plate is formed, and an end of bourdon tube is by sealing chieftain sealing, and is connected with connecting rod; The other end of connecting rod and sector gear is for fixedlying connected.During measuring pressure, gas enters bourdon tube by wireway by support, makes the bourdon tube free end produce displacement, drives sector gear by connecting rod and rotates, and the central shaft gear is rotated, and then drives the pointer that is contained on the central shaft gear, and pointer rotates and shows the pressure indicating value.After pressure disappeared, bourdon tube restored, and drove movement by connecting rod and made pointer reply zero-bit.This tensimeter is reading while operating, and misreads easily, and is very inconvenient.The use occasion that has requires very high to tire pressure measurement, as in aviation flight, the tire pressure during to aircraft landing has very high requirement, needs to guarantee the equalization of pressure of each tire.Operating personnel when measuring while operate reading, misread easily, labour intensity is also very high, can not satisfy fast, makes things convenient for requirement accurately.

The purpose of this utility model is to provide a kind of pressure gauge with memory.The force value that this pressure gauge can will last time be measured remains, and when measuring next time force value, only need click balancing controls, and pressure gauge is returned to zero-bit and can measures, be convenient to and last time institute's measuring pressure value compare.

The utility model is achieved in that on the basis of existing pressure gauge grooved bore on connecting rod, sector gear and fixedlying connected of connecting rod is changed into rivet is housed on sector gear, and rivet slides in the slotted eye of connecting rod; Replace hairspring with the spring bar in movement, the spring bar is the shape of standing like the legs of a tripod, and is contained in central shaft gear lower end, is supported on the lower plate of movement; At the balancing controls that have the promotion sector gear to starting point near the sector gear place.

Accompanying drawing 1 is looked synoptic diagram for the pressure gauge master that the utility model band memory pressure gauge is used for measure tire pressure, and accompanying drawing 2 is looked synoptic diagram for the right side of accompanying drawing 1.

Among the figure: 1 gas operated device, 2 supports, 3 pointers, 4 dial plates, 5 watchcases, 6 bourdon tubes, 7 bridge screws, 8 train wheel bridges, 9 lower plates, 10 spring bars, 11 safety plugs, 12 sealing chieftains, 13 sector gears, 14 central shaft gears, 15 connecting rods, 16 rivets, 17 guide pin bushings, 18 springs, 19 push rods, 20 nuts, 21 buffer screws, 22 wireways, 23 sealing gaskets, 24 buffer screws.

Band memory pressure gauge is hinged with different gas operated devices, can measure the force value of different objects, and present embodiment is example with the measure tire pressure.Below in conjunction with accompanying drawing the utility model is described in detail.

The tipping of band memory pressure gauge can be opened the gas operated device 1 of tyre valve, this device comprises wireway 22, the top of forming by buffer screw 24 and sealing gasket 23, by buffer screw 21 that form with the support union end, behind the top tipping tyre valve of gas operated device, the wireway 22 of tire gas in gas operated device enters support 2.Bourdon tube 6 one ends be welded on the support and with support UNICOM, the other end is by sealing chieftain 12 sealings, the sealing chieftain is connected with connecting rod 15, has slotted eye on the connecting rod; Movement is by last lower plate 8,9, fan type gear 13, and central shaft gear 14, spring bar 10 is formed, and the spring bar is the shape of standing like the legs of a tripod, and is contained in central shaft gear lower end, is supported on the lower plate 9 of movement; Sector gear 13 1 ends are equipped with rivet 16, and rivet can slide in connecting rod 15 slotted eyes; At the balancing controls that have the promotion sector gear to starting point near sector gear 13 places.Balancing controls are by push rod 19, guide pin bushing 17, spring 18, nut 20 is formed, guide pin bushing 17 is spun on the watchcase 5, in the middle of the push rod 19 convex shoulder is arranged, and spring 18 places in the guide pin bushing, push rod passes spring and guide pin bushing, push rod convex shoulder one end props up spring, and the convex shoulder other end is spun on the guide pin bushing and the nut 20 that props up watchcase is pushed down, and an end of push rod stretches out and promotes sector gear 13, the other end is stretched outside watchcase, presses for hand.

When measuring pressure, behind the top tipping tyre valve of gas operated device, buffer screw 24 is opened tyre valve, make the gas in the tire enter support 2 and bourdon tube 6 through buffer screw 21, make the bourdon tube free end produce displacement, move by the moving connecting rod 15 of seal head subband by wireway 22, drive the sector gear 13 that rivet 16 is delivered to movement by connecting rod, rotate thereby drive central shaft gear 14, the pointer 3 that is contained on the central shaft gear rotates simultaneously, shows its force value by dial plate 4.After pressure disappeared, bourdon tube and connecting rod resetted, but the rivet in the connecting rod slotted eye can slide in slotted eye and makes the motionless substantially or fine motion of sector gear in the movement; The spring bar 10 of the shape of standing like the legs of a tripod is housed in movement, and this spring bar has increased the friction of central shaft gear, stops the rotation of movement gear, so pointer reset to zero has not kept the measurement indicating value.When resetting: need only the push rod of pressing gently in the balancing controls 19, make push rod promote sector gear and rotate, drive the central shaft gear and rotate, pointer is reset to zero then.Push rod was in minimum point when the characteristics of these balancing controls were the pressure full scale, and when push rod was pressed extreme position, pointer was just in time in zero-bit, and its spacing is from regulating.Balancing controls are fixed on the watchcase lower right in the present embodiment, can reset the position of balancing controls in case of necessity as required.

In the behind of watchcase safety plug 11 is housed, just in case hypertonia, surpasses the limit of its table and when bourdon tube taking place breaking, gas will discharge in safety plug, the accident that the glass damage of having avoided causing owing to hypertonia is hurted sb.'s feelings.

The utility model band memory pressure gauge has band memory and zeroing function, and measuring accuracy is higher, and range of application is wider, as surveying aero tyre or doughnut, loads onto special-purpose gas operated device and gets final product, and when needing to keep the pressure indicating value, also can directly show with this.

Claims (3)

1 one kinds of band memory pressure gauges, form by wireway, support, bourdon tube, sealing chieftain, connecting rod, movement, pointer, dial plate and watchcase, movement comprises sector gear, central shaft gear and upper and lower clamping plate, it is characterized in that having on the connecting rod slotted eye, one end of sector gear is equipped with rivet, and rivet can slide in the connecting rod slotted eye; Also comprise the spring bar in movement, the spring bar is the shape of standing like the legs of a tripod, and is contained in central shaft gear lower end, is supported on the lower plate of movement; At the balancing controls that have the promotion sector gear to starting point near the sector gear place.

2 band memory pressure gauges according to claim 1, it is characterized in that balancing controls are made up of push rod, guide pin bushing, spring and nut, guide pin bushing is spun on the watchcase, in the middle of the push rod convex shoulder is arranged, spring places in the guide pin bushing, and push rod passes spring and guide pin bushing, push rod convex shoulder one end props up spring, the convex shoulder other end is spun on the guide pin bushing and the nut that props up watchcase is pushed down, and an end of push rod stretches out the promotion sector gear, and the other end is stretched outside watchcase.

3 band memory pressure gauges according to claim 1 and 2 is characterized in that tipping has the gas operated device that can open tyre valve in the support lower end, and this gas operated device comprises wireway, buffer screw, sealing gasket.

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