High pressure bidirectional miniature electric gas pump

• US 10,012,221 B2
• Filed: 07/22/2015
• Issued: 07/03/2018
• Est. Priority Date: 05/26/2011
• Status: Active Grant

• Current Assignee: Beijing Const Instrument Technology Inc.
• Original Assignee: Beijing Const Instrument Technology Inc.
• Inventors: Jiang, Weili
• Primary Examiner(s): Omgba, Essama
• Assistant Examiner(s): Mick, Stephen
• Application Number:
  US14/806,196
• Publication Number:
  US 20150322936A1
• Time in Patent Office: 1,077 Days
• Field of Search: 417418, 92 72, 92140
• CPC Class Codes: F04B 19/006 Micropumps F04B43/043 and F04B43/095 take precedence
• CPC Class Codes: F04B 35/04 the means being electric
• CPC Class Codes: F04B 39/00 Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
• CPC Class Codes: F04B 39/0005 adaptations of pistons
• CPC Class Codes: F04B 39/0094 crankshaft
• CPC Class Codes: F04B 51/00 Testing machines, pumps, or pumping installations
• CPC Class Codes: G01L 27/005 Apparatus for calibrating pressure sensors
• CPC Class Codes: G05D 16/208 using a combination of controlling means as defined in G05D16/2013 and G05D16/2066 G05D16/2073 takes precedence

Abstract

Provided is a multi-range field full-automatic pressure and electric signal calibrating instrument, comprising: control components such as a shell, a power switch, multiple-interfaces, a display, a keyboard, and a gas pressure generating unit, a power supply unit, a pressure detecting unit, a gas pressure control unit and an electric signal detecting unit; the pressure output end of the pressure control unit is in parallel connection with pressure joints which are used for installing multiple pressure standard meters and detected meters with different ranges; the pressure control unit is in signal connection with the pressure standard meters; the electric signal detecting unit is in signal connection with the pressure control unit and the detected meters; the power supply unit can supply power by batteries. The calibrating instrument does not need to be externally connected with a gas cylinder and an alternating current power supply and can automatically generate a gas pressure and generate an accurate standard pressure; the design of the multi-range pressure standard meter can be suitable for various detected meters; the double detection and calibration for pressure and electric signals can be implemented; the weight and volume of the instrument are small; and the multi-range field full-automatic pressure and electric signal calibrating instrument is convenient to carry in the field and can carry out automatic calibration on various field pressure instruments.

Claims

1. A high pressure bidirectional miniature electric gas pump, comprising a motor, an eccentric shaft, a swing rod, a pump body, a left cylinder body and a right cylinder body, a piston rod, and a plurality of one-way valve bodies and cylinder heads attached to the left and right cylinder bodies, wherein

the pump body is a connecting member, the motor is fixed to the pump body, and a motor shaft extends into the pump body and is connected with the eccentric shaft;

the eccentric shaft is of a cylindrical shape, and has at one end thereof a driving pin deviated from the motor shaft axis, the driving pin extending through a mounting hole in the swing rod, which is flat-shaped and located below the eccentric shaft;

the swing rod is connected to the piston rod disposed horizontally therebelow through a screw, with a gap existing between the swing rod and the piston rod;

the piston rod is of a cylindrical shape, and opposite ends thereof are mounted with sealing rings and extend into the left and right cylinder bodies, respectively, the sealing rings being hermetically fitted with inner walls of the cylinder bodies;

the left and right cylinder bodies are each of a cylindrical structure, and the left and right cylinder bodies are fixedly mounted at opposite ends of the pump body, respectively, taking the piston rod horizontally disposed therein as an axis; and

each of the left and right cylinder bodies is sequentially provided at an outer end thereof with respective one-way valve bodies and cylinder head, the one-way valve bodies each being installed at an inner side of the respective cylinder head, communicated with an inner cavity of a respective cylinder body, and communicated with external air or a compressed air line through passages in the respective cylinder head.

2. The high pressure bidirectional miniature electric gas pump of claim 1, wherein the piston rod forms sealing, through the sealing rings mounted at the opposite ends thereof, at the inner walls of the left and right cylinder bodies;

and a swing motion of the swing rod drives the piston rod to reciprocate within the left and right cylinder bodies along the axis.

3. The high pressure bidirectional miniature electric gas pump of claim 2, wherein the gap between the swing rod and the piston rod is adjusted through the screw.

4. The high pressure bidirectional miniature electric gas pump of claim 3, wherein the outer end of each of the left and right cylinder bodies is mounted with two reversely disposed one-way valve bodies respectively at an upper and a lower position, wherein one of the two reversely disposed one-way valve bodies is communicated with the external air for intaking the external air, and the other of the two reversely disposed one-way valve bodies is communicated with the compressed air line for discharging high pressure gas.

5. The high pressure bidirectional miniature electric gas pump of claim 4, wherein a cylinder head gasket is disposed between the two reversely disposed one-way valve bodies and the respective cylinder body.

6. The high pressure bidirectional miniature electric gas pump of claim 4, wherein each of the one-way valve bodies is formed through assembly of a cavity seal body, an elastic arm, a metal pad, and a valve sealing ring, wherein the elastic arm extends inwardly from the cavity seal body and is coupled with a top end of the metal pad, and a bottom end of the metal pad is fixedly embedded with the valve sealing ring.

7. The high pressure bidirectional miniature electric gas pump of claim 6, wherein the valve sealing ring is located on a gas passage between the respective cylinder head and cylinder body.

8. The high pressure bidirectional miniature electric gas pump of claim 7, wherein the cavity seal body is of an annular structure, serves as an outer support and seal for an overall structure of each one-way valve body, is made of elastic material, and is disposed between the respective cylinder head and cylinder body for sealing of the gas passage between the respective cylinder head and cylinder body.

9. The high pressure bidirectional miniature electric gas pump of claim 8, wherein the elastic arm is integrated with the cavity seal body, is of a strip-like structure extending inwardly, and is made of elastic material;

the metal pad is of a disc shape, and is provided at an upper portion thereof with an annular slot into which an end of the elastic arm is engaged; and

the metal pad is provided at a bottom portion thereof with an annular groove into which the valve sealing ring is fixed.

10. The high pressure bidirectional miniature electric gas pump of claim 1, wherein the gap between the swing rod and the piston rod is adjusted through the screw.

11. The high pressure bidirectional miniature electric gas pump of claim 1, wherein the outer end of each of the left and right cylinder bodies is mounted with two reversely disposed one-way valve bodies respectively at an upper and a lower position, wherein one of the two reversely disposed one-way valve bodies is communicated with the external air for intaking the external air, and another of the two reversely disposed one-way valve bodies is communicated with the compressed air line for discharging high pressure gas.

12. The high pressure bidirectional miniature electric gas pump of claim 11, wherein a cylinder head gasket is disposed between the two reversely disposed one-way valve bodies and the respective cylinder body.

13. The high pressure bidirectional miniature electric gas pump of claim 11, wherein each of the one-way valve bodies is formed through assembly of a cavity seal body, an elastic arm, a metal pad, and a valve sealing ring, wherein the elastic arm extends inwardly from the cavity seal body and is coupled with a top end of the metal pad, and a bottom end of the metal pad is fixedly embedded with the valve sealing ring.

14. The high pressure bidirectional miniature electric gas pump of claim 13, wherein the valve sealing ring is located on a gas passage between the respective cylinder head and cylinder body.

15. The high pressure bidirectional miniature electric gas pump of claim 14, wherein the cavity seal body is of an annular structure, serves as an outer support and seal for an overall structure of each one-way valve body, is made of elastic material, and is disposed between the respective cylinder head and cylinder body for sealing of the gas passage between the respective cylinder head and cylinder body.

16. The high pressure bidirectional miniature electric gas pump of claim 15, wherein the elastic arm is integrated with the cavity seal body, is of a strip-like structure extending inwardly, and is made of elastic material.

17. The high pressure bidirectional miniature electric gas pump of claim 16, wherein the metal pad is of a disc shape, and is provided at an upper portion thereof with an annular slot into which an end of the elastic arm is engaged.

18. The high pressure bidirectional miniature electric gas pump of claim 17, wherein the metal pad is provided at a bottom portion thereof with an annular groove into which the valve sealing ring is fixed.

19. The high pressure bidirectional miniature electric gas pump of claim 15, wherein the metal pad is of a disc shape, and is provided at a bottom portion thereof with an annular groove into which the valve sealing ring is fixed.

20. The high pressure bidirectional miniature electric gas pump of claim 14, wherein the metal pad is provided at a bottom portion thereof with an annular groove into which the valve sealing ring is fixed.