CN2364431Y

CN2364431Y - Delicate adjusting gas source device

Info

Publication number: CN2364431Y
Application number: CN 99206051
Authority: CN
Inventors: 杨玉瑞
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-03-20
Filing date: 1999-03-20
Publication date: 2000-02-16
Anticipated expiration: 2009-03-20

Abstract

The utility model relates to a delicate adjusting gas source device, comprising a capacity changing cylinder body, an adjusting valve and a connector. The adjusting valve and the connector are connected with the cylinder body as integration. The adjusting valve is a two-way valve. One way is served as an outer connector and the other way is communicated with the inner chamber of the cylinder body. The connector is communicated with the inner chamber of the cylinder body directly. A piston and an adjusting leading screw are installed inside the cylinder body. An adjustable reducing handle is installed outside the adjusting leading screw. The pressure generating, adjusting and control range of the device are accurate, and continuous pressure micro-adjusting can be carried out. The device can replace the vacuum air pump, compression pump, pressure regulator and control switch, etc. The delicate adjusting gas source device has the advantages of compact conformation, small volume, light weight, non power using, simple operation and convenient carrying, etc.

Description

The accurate adjustment compressed air source unit

The utility model belongs to the variable displacement type positive/negative pressure to be taken place and regulating device, is specifically related to a kind of manual accurate adjustment compressed air source unit.

In commercial production and metrology and measurement, the pressure generator of use is generally vacuum pump or compression pump.These equipment all are as power source with electric power, independent generation malleation or negative pressure, equipment self can not carry out pressure to be regulated, particularly can not carry out continuous pressure between positive negative pressure regulates, regulate as need, must be in peripheral some regulating devices that increase of equipment, as regulator, switch, pipeline etc., system is comparatively numerous and diverse.Metrological service uses just very inconvenient when instrument is carried out verification.In addition for some mobile units, field work or do not have the occasion of power supply to use just more can't to have carried out.

The purpose of this utility model is to provide a kind of usable range wide portable accurate adjustment compressed air source unit at above deficiency.

Technical solution of the present utility model is: the accurate adjustment compressed air source unit is chewed and is formed by the long-pending cylinder body of transfiguration, variable valve, adapter, its variable valve and adapter are chewed and are arranged on cylinder body air pressure and end takes place and connect as one with cylinder body, variable valve is a two-way valve, wherein one the tunnel is that extension tube attached is chewed, and another road communicates with inner chamber of cylinder block; Adapter is chewed to plug formula sealing adapter and is chewed, and this adapter is chewed directly and communicated with inner chamber of cylinder block; Piston is housed in the cylinder body and regulates leading screw, piston is connected by connector with the adjusting leading screw, regulates the leading screw outer end scalable reducing handle is housed.

The utility model is according in the air seal system, and under the temperature-resistant situation, the product of pressure and volume is similar to constant, and the change volume designs with regard to the principle that changed pressure.

This device can replace vacuum pump, compression pump, pressure governor and gauge tap etc. to a certain extent, gather multi-function in integral whole, pressure generation, adjusting, range of control are accurate, of many uses, have compact conformation, volume is little, in light weight, without power supply, simple to operate, characteristics such as easy to carry.

In the aerospace system, may command is measured flight air pressure instrument (as height indicator, airspeed indicator, mach indicator etc.) and the sensor more than 95%, also can detect the air speed system performance; Be used to measure the meteorological pressure tool of verification in meteorological department; In commercial production metrological service, be used to measure verification absolute pressure, gauge pressure, differential pressure meter and sensor; In oil, oil gas field, field work, be used for detected pressures instrument and sensor; In the colliery, be used for verification mine ventilation pressure tool and optics firedamp testing instrument etc.In a word, negative pressure 0～-0.1MPa, or malleation 0～0.35MPa, or all be suitable in the pressure range of adjustment of positive negative pressure-0.1～0.35MPa, and can realize that trace regulates particularly can carry out continuous pressure trace and regulate between positive negative pressure.

Further describe the utility model below in conjunction with accompanying drawing:

Fig. 1 is an accurate adjustment compressed air source unit structural representation;

Fig. 2 is the variable valve structural representation;

Fig. 3 takes over for the sealing of plug formula and chews structural representation;

Fig. 4 is piston and leading screw syndeton synoptic diagram;

Fig. 5 is one of accurate adjustment compressed air source unit embodiment;

Fig. 6 is the variable valve structural representation that is installed on Fig. 5.

Wherein: 1, variable valve 2, extension tube attached chew 3, the sealing of plug formula takes over and chew 4, cylinder end caps 5, the long-pending cylinder body 6 of transfiguration, regulate leading screw 7, reducing handle 8, spool 9, through hole 10, O-ring seal 11, pressure cap 12, O-ring seal 13, threaded plug 14, right hand piston O-ring seal 15, aligning ball 16, piston 17, adapter sleeve 18, contiguous block 19, O-ring seal 20, door 21, left hand piston O-ring seal 22, valve seat

As shown in Figure 1, the accurate adjustment compressed air source unit is chewed 3 by the long-pending cylinder body 5 of transfiguration, variable valve 1 and plug formula sealing adapter and is formed, variable valve 1 and plug formula sealing adapter are chewed 3 and are installed on the cylinder end caps 4, and piston 16 and leading screw 6 are contained in the cylinder body 5, and reducing handle 7 is contained in leading screw 6 ends.

Variable valve 1 is a needle valve, is mainly used in the on-off action of flow initial adjustment and air pressure, its structure as shown in Figure 2, valve seat and cylinder end caps 4 are designed to one, through hole 9 is communicated with inner chamber of cylinder block, valve body one side is established extension tube attached and is chewed 2.For guaranteeing impermeability, compress O-ring seal 10 with pressure cap 11 in spool 8 and valve seat cooperation place.

Plug formula sealing adapter is chewed 3 and is used to connect test specimen, or is communicated with fine setting chamber pressure, not salable blocking of time spent with atmosphere with it.As shown in Figure 3, this adapter is chewed an end threaded plug 12 is housed, and end face is by O-ring seals 12 sealings, and the other end is communicated with inner chamber of cylinder block through valve hole 9.

Piston is connected by connector with the adjusting leading screw, and the structure of connector as shown in Figure 4.Connector comprises contiguous block 18, adapter sleeve 17 and aligning ball 15, and contiguous block 18 is fixedlyed connected with piston door 20, and O-ring seal 19 is equipped with at the door place; Adapter sleeve 17 is sleeved on contiguous block 18 outsides and is fixed on leading screw 6 heads, and the end of contiguous block and leading screw is equipped with taper hole, is embedded with aligning ball 15 between two taper holes.

Be provided with radial play and end play between above-mentioned adapter sleeve and the contiguous block, rotate flexibly to guarantee leading screw 6, but piston automatic aligning during axial displacement, and make the piston can only axial translation and do not rotate.Piston adopts the two way seal structure, and when the pressure reduction left side at piston two ends during greater than the right side, left end O-ring seal 21 plays a major role, and during same R)L, right-hand member O-ring seal 14 plays a major role, and pressure reduction is big more, and sealing effectiveness better.

The adjusting leading screw of this device is ball-screw or trapezoidal threaded lead screw, big pressure ball-screw, and little pressure trapezoidal threaded lead screw is rotated very flexible.Above-mentioned inner chamber of cylinder block structure is piston shape or bellow-shaped, can select to determine according to the design needs.

Fig. 5, Fig. 6 are a kind of version of this device variable valve perpendicular to the cylinder body axis, and its valve seat 22 is installed on the cylinder end caps 4, and through hole 9 is positioned at the straight-through inner chamber of cylinder block in spool 8 lower ends, and extension tube attached is chewed 2 and is arranged on valve seat 21 1 sides.Plug formula sealing adapter is chewed 3 and is arranged on the valve seat 22, and communicates with inner chamber of cylinder block by through hole 9.

Claims

1, a kind of accurate adjustment compressed air source unit, chew and form by the long-pending cylinder body of transfiguration, variable valve, adapter, it is characterized in that variable valve and adapter are chewed to be arranged on cylinder body air pressure and end takes place and to connect as one that variable valve is a two-way valve with cylinder body, wherein one the tunnel is that extension tube attached is chewed, and another road communicates with inner chamber of cylinder block; Adapter is chewed to plug formula sealing adapter and is chewed, and this adapter is chewed directly and communicated with inner chamber of cylinder block; Piston is housed in the cylinder body and regulates leading screw, piston is connected by connector with the adjusting leading screw, regulates the leading screw outer end scalable reducing handle is housed.

2, accurate adjustment compressed air source unit according to claim 1, it is characterized in that above-mentioned connector comprises contiguous block, adapter sleeve and aligning ball, contiguous block is fixedlyed connected with the piston door, adapter sleeve is sleeved on the contiguous block outside and is fixed on the leading screw head, the end of contiguous block and leading screw is equipped with taper hole, is embedded with the aligning ball between two taper holes.

3, accurate adjustment compressed air source unit according to claim 1 is characterized in that above-mentioned piston adopts the two way seal structure.

4, accurate adjustment compressed air source unit according to claim 1 is characterized in that above-mentioned adjusting leading screw is ball-screw or trapezoidal threaded lead screw.

5, accurate adjustment compressed air source unit according to claim 1 is characterized in that above-mentioned inner chamber of cylinder block structure is piston shape or bellow-shaped.