CN2651724Y - Active piston flow calibration equipments - Google Patents

Abstract

The utility model provides an initiative piston type flow rate check device comprising a piston cylinder, a piston, a bead rod, a Glyd Ring seal structure, a synchronous belt drive structure, a piston displacement pulsing signal sending and an output gas counting system, which can be adopted to check the gas flowmeter and liquid flowmeter. The utility model is characterized in that: a rotary encoder synchronously emits bead rod displacement helix distance parameter and motor revolution number pulse signal to a computer and displays and records the volume of output gas; a seal piston of the Glyd ring can enhance the seal and abrasion resistance performance. Therefore, with feasible structure and high measuring accuracy, the utility model can check the gas flowmeter and liquid flowmeter and ensure the advantages of high check accuracy and convenient application.

Description

Active piston formula flow calibration equipment

The utility model belongs to the active piston formula flow calibration equipment of gas flow calibration technology.

At present, generally adopt method of standard table to come the industrial and domestic gas flow instrument of verification abroad, and the verification of standard scale is usually with the calibration equipment of pin-point accuracies such as Mt device, PVTt device and piston type gas flow standard set-up, domesticly generally come the industrial and domestic gas flow instrument of verification with bell-jar gas flow standard equipment, but its floor area is big, inefficiency, and constant temperature requires high, value is also not accurate enough, so can not the higher gas flow instrument of verification accuracy.The utility model adopts the unitized construction of novel features, can reach very high accuracy, and easy to use, and the standard set-up that can be used as verification calibrating gas flow instrument uses.

The purpose of the utility model design, be to adopt piston pearl bar pearl oyster to be with drive mechanism synchronously, the piston lattice enclose hermetically-sealed construction and the piston displacement pulse signal sends and output gas counting system, be designed to novel active piston formula flow calibration equipment, claimed structure is reasonable, accuracy of measuring height can be used for verification high-precision gas flow instrument and fluid flow instrument, and has advantage easy to use.

The technical essential of the utility model design is as follows: (1) design is by frequency converter 29, change speed motor 27, synchromesh gear (26,22) and be with 24 to form drive mechanism synchronously, can drive pearl oyster 23 rotates, make piston pearl bar 30 same moved further, and by the manual command coil 36 will instruct the input computing machine 34, control of conversion device 29 changes change speed motor 27 rotating speeds and direction (referring to Fig. 1); (2) design by piston 1, lattice enclose 2, O type rubber band 3 and lubricating oil 33 forms piston sealing structure, available O type rubber band compresses lattice and encloses to keep better sealing, and put into lubricating oil to increase piston abrasion-proof and sealing (referring to Fig. 1), and (3) design is sent motor 27 revolutions and piston 1 displacement pulse signals by rotary encoder 25, computing machine 34 be can import and the displacement of piston 1 and the volume that piston extrudes gas calculated, and by showing the flow and the integrated flux (referring to Fig. 1) of the gas that printer 35 displayed record active piston formula flow apparatus are exported.

Also in conjunction with the accompanying drawings project organization of the present utility model is described in detail as follows with embodiment below:

Fig. 1 is the structure principle chart of active piston formula flow calibration equipment.

As shown in Figure 1, this active piston formula flow calibration equipment encloses hermetically-sealed construction, pearl bar pearl oyster by piston cylinder 4, piston 1, pearl bar 30, lattice and is with drive mechanism, piston displacement pulse signal to send and output gas counting system synchronously, and gas-liquid turnover pipe valve, pressure and temp transmitter (9,5) are formed with limit switch 18.It is characterized in that having 1 to be slidingly connected by piston 1 outer ring surface and piston cylinder 4 inwalls, the inner groove dative encloses 2 sliding sleeves and connects, lattice enclose 2 outer shrouds and are connected with piston cylinder 4 inwall slipper seals, the interior ring with O type rubber band 3 compresses to keep sealing, and lubricating oil 33 is poured in above the piston 1 and encloses hermetically-sealed construction with increase piston abrasion-proof and sealing composition lattice; Accepting computing machine 34 and manual command by frequency converter 29 the right for 1 coils 36 instructions and comes frequency conversion and break-in, the left side is to change speed motor 27 input currents and drive the motor rotation, 27 of change speed motoies are fixedlyed connected with synchromesh gear 26, by being with 24 to be in transmission connection with synchromesh gear 22 synchronously, synchromesh gear 22 endoporus and pearl oyster 23 covers are solidly connected, the hemisphere screw thread is rotationally connected synchronously by spherical steel ball and piston pearl bar 30 outer hemisphere spirals in the pearl oyster 23, and with 23 displacements of keeper restriction pearl oyster, rotate with piston guide rod 19 limited piston 30, then, pearl oyster 23 rotations 1 circle is with drive mechanism synchronously apart from forming pearl bar pearl oyster with 1 spiral of moved further when can driving piston pearl bar 30, and 1 be connected synchronously by 27 upper ends of rotary encoder 25 endoporus and change speed motor, and motor 27 revolutions and piston pearl bar 30 displacement screws are carried out synchronous coding apart from number, send piston displacement pulse signal input computing machine 34, can calculate the volume that piston displacement and piston extrude gas, input shows that printer 35 displayed record go out the volume composition piston displacement pulse signal transmission and the output gas counting system of verification gas again.Described piston cylinder 4 lower ends and base plate 12 are sealedly and fixedly connected, on the lower shoe 12 4 pores respectively with gas, liquid inflow pipe 14, piezometric tube (15,16) gentle, liquid outlet 17 is sealedly and fixedly connected, draft tube 14 is connected with filtrator 13 outlets by gas admittance valve 11, be connected with feed tube by feed liquor valve 10, piezometric tube 15 is connected with computing machine 34 by pressure unit 9, piezometric tube 16 is connected with U-tube manometer 7 inlets, gas liquid outlet pipe 17 is connected with computing machine 34 by temperature transmitter 5 outputs, connect by vent valve 6 external gas flow instrument inlet tubes, by tapping valve 8 discharged liquids, piston cylinder 4 upper ends tighten up with upper cover plate 21 and are connected, upper cover plate 21 left sides, in, right guide hole respectively with piston guide rod 19, piston pearl bar 30 is connected with liquid overflow pipe 20 sliding sleeves, piston guide rod 19 bottom righthand sides are fixedlyed connected with piston 1 upper surface, the lower-left end is fixedlyed connected with limit switch 18, limit switch 18 upper contacts send signal and stop piston 1 upward displacement when running into upper cover plate 12 left supported plates, lower contact sends signal when running into lower shoe 12 left supported plates stops piston 1 and is shifted downwards, fixedly connected with piston 1 upper end and drive under the piston upward mobile in piston pearl bar 30 lower ends, bottom pearl bar and upper cover plate 21 mesopores are slidingly connected, top pearl bar hemisphere spiral is dynamically connected by spherical steel ball and pearl oyster 23 hemisphere screw threads transfer synchronously, and by synchromesh gear 22 be with 24 to be in transmission connection synchronously, liquid overflow pipe 20 lower ends are passed piston 1 and are communicated with piston cylinder 4, last pipe by surplus valve 31 with connect liquid bath 32 and be connected.

The active piston formula flow calibration equipment that manufactures and designs according to present embodiment in a word, just can move output counting gas flow and integrated flux by piston, but verification gas or fluid flow instrument, send piston pearl bar displacement screw synchronously apart from number and motor revolution pulse signal by rotary encoder, sending into computing machine calculates, but and volume, flow and the integrated flux of displayed record piston displacement institute output verification fluid, enclose packed-piston by lattice, the sealing and the wearing quality that can highly keep piston to move.The utility model project organization is reasonable, accuracy of measuring height, but verification gas discharge instrument is known other gas, flow quantity instrument, and have the high and advantage easy to use of checking precision.

Claims (3)

1. active piston formula flow calibration equipment, it is by piston cylinder (4), piston (1), piston pearl bar (30), the piston lattice enclose hermetically-sealed construction, pearl bar pearl oyster is with drive mechanism synchronously, the piston displacement pulse signal sends and output gas counting system, and gas-liquid import pipe valve, pressure and temp transmitter (9,5) with limit switch 18 compositions such as grade, it is characterized in that having 1 to be connected with piston cylinder (4) inwall slipper seal by piston (1) outer ring surface, the inner groove dative encloses (2) sliding sleeve and connects, lattice enclose (2) outer shroud and are connected with piston cylinder (4) inwall slipper seal, in ring compress keeping sealing with O type rubber band (3), lubricating oil (33) is placed on above the piston (1) with increase piston abrasion-proof and sealing to be formed the piston lattice and encloses hermetically-sealed construction.

2. active piston formula flow calibration equipment as claimed in claim 1, it is characterized in that it is to accept computing machine (34) and manual command's dish (36) instructs frequency conversion and break-in by frequency converter (29) the right that pearl bar pearl oyster is with drive mechanism synchronously, the left side is to change speed motor (27) input current and motor is rotated, change speed motor (27) axle is fixedlyed connected with synchromesh gear (26), be connected with synchromesh gear (22) synchrodrive by synchronous band (24), synchromesh gear (22) endoporus and pearl oyster (23) cover are solidly connected, the interior hemisphere screw thread of pearl oyster (23) shifts synchronously by spherical steel ball and the outer hemisphere spiral of piston pearl bar (30) and is dynamically connected, and limit pearl oyster (23) displacement with keeper, rotate with piston guide rod (19) limited piston pearl bar (30), then form with 1 spiral distance of moved further when pearl oyster (23) rotation 1 circle can drive piston pearl bar (30).

3. active piston formula flow calibration equipment as claimed in claim 1, it is characterized in that it is to be connected synchronously with change speed motor (27) axle upper end with shaft coupling by rotary encoder (25) axle that the piston displacement pulse signal sends with output gas counting system, and motor (27) revolution and piston pearl bar (30) displacement screw carried out synchronous coding apart from number, send piston displacement pulse signal input computing machine (34), the volume that piston displacement and piston extrude verification gas be can calculate, the volume, flow and the integrated flux that show printer (35) displayed record verification gas delivered to again.