CN216093746U

CN216093746U - Air-pumping hand pump capable of viewing gas volume

Info

Publication number: CN216093746U
Application number: CN202122533572.4U
Authority: CN
Inventors: 吴志勇
Original assignee: Liaoning Anke Safety Evaluation Co ltd
Current assignee: Liaoning Anke Safety Evaluation Co ltd
Priority date: 2021-10-21
Filing date: 2021-10-21
Publication date: 2022-03-22
Anticipated expiration: 2031-10-21

Abstract

The utility model discloses a gas-extracting hand pump with visible gas volume, which comprises an air extracting cylinder, wherein the lower end of the air extracting cylinder is provided with a connector, the upper end of the air extracting cylinder is sleeved with a sealing cover, a rubber piston is connected in the air extracting cylinder in a sliding manner, the upper end of the rubber piston is fixedly connected with a lifting mechanism, the lifting mechanism is slidably arranged in the center of the sealing cover, the lifting mechanism comprises a rod sleeve and an accurate moving rod, the accurate moving rod is inserted in an inner cavity of the rod sleeve, the lower end of the accurate moving rod is rotatably arranged in the center of the upper end of the lifting mechanism, the accurate moving rod can drive the rubber piston to move in the air extracting cylinder through the matching of the arranged rod sleeve and the accurate moving rod, when the set volume is approached, the rod sleeve is locked through screwing a fixing screw, then the accurate moving rod is rotated, the rubber piston is lifted through the matching of threads between the rod sleeve and the accurate moving rod, the rubber piston is more accurately moved, so that the volume of the gas pumped by the air pumping hand pump is more accurate.

Description

Air-pumping hand pump capable of viewing gas volume

Technical Field

The utility model belongs to the technical field of detection equipment, and particularly relates to a gas-pumping hand pump with a visible gas volume.

Background

The gas detecting tube is a device for measuring the content of a certain component in sample gas, the gas detecting tube is used for sawing two ends of the gas detecting tube according to the amount of an entering sample and the color changing depth of a reagent or the length of a color changing part by means of a standard color scale, and silica gel or alumina gel is filled in the front end and the rear end of a detected reagent.

When the gas detection tube is used, two ends of the gas detection tube are sawn, one end of the gas detection tube is connected to a medical injector, and then a certain volume of sample gas in the injector is slowly injected into the gas detection tube, so that the sample can be measured.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a hand pump capable of providing a visual air volume to solve the above problems.

In order to achieve the purpose, the utility model provides the following technical scheme: an air-extracting hand pump with visible air volume comprises an air extracting cylinder, the lower end of the air extracting cylinder is provided with a connector, and the upper end of the air extraction cylinder is sleeved with a sealing cover, the air extraction cylinder is connected with a rubber piston in a sliding way, the upper end of the rubber piston is fixedly connected with a lifting mechanism, the lifting mechanism is slidably arranged in the center of the sealing cover and comprises a rod sleeve and an accurate moving rod, the accurate moving rod is inserted in the inner cavity of the rod sleeve, the lower end of the accurate moving rod can be rotatably arranged at the center of the upper end of the lifting mechanism, the outer wall of the accurate moving rod is provided with external threads, and the inner walls of the two ends of the rod sleeve are provided with internal threads, the rod sleeve is in threaded connection with the accurate moving rod, the upper end of the accurate moving rod is fixedly connected with a knob, the side wall of the sealing cover is in threaded connection with a fixing screw, and the inner end of the fixing screw penetrates through the sealing cover to be abutted to the outer wall of the rod sleeve.

Preferably, the outer wall of the accurate moving rod is provided with lifting scales, the outer wall of the accurate moving rod is provided with accurate scales in a threaded mode, and a positioning pointer is arranged at the position, close to the side wall of the rod sleeve, of the upper end of the sealing cover.

Preferably, the rod sleeve is a transparent PVC pipe with a smooth outer wall, and a silica gel head is arranged at the inner end of the fixing screw.

Preferably, a stabilizing plug is arranged at the center of the bottom side of the sealing cover and is matched with the upper end of the inner cavity of the air pumping cylinder.

Preferably, the connector includes barrel intercommunication mouth, barrel intercommunication mouth fixed mounting and the bottom center of exhaust column, and the inner chamber intercommunication of barrel intercommunication mouth and exhaust column, barrel intercommunication mouth outer wall threaded connection has the rotating head, the lower extreme of rotating head is provided with the swivelling joint mouth, and the upper end lateral wall of swivelling joint mouth has seted up a plurality of intercommunicating pores, and a plurality of intercommunicating pores intercommunication swivelling joint mouth and rotating head inner chamber, the upper end of swivelling joint mouth is provided with the contact packing pad, the bottom phase-match of the sealed pad of contact and barrel intercommunication mouth.

Preferably, the center of the bottom of the inner cavity of the air pumping cylinder is provided with a conical recess, and the bottom of the rubber piston is provided with a conical bulge matched with the conical recess.

Preferably, the bottom of the side wall of the rod sleeve is provided with a limiting block.

Compared with the prior art, the utility model has the beneficial effects that:

(1) this visual gaseous volumetric hand pump of bleeding, through the rod cover and the cooperation of accurate carriage release lever that set up, accurate carriage release lever can drive rubber piston and remove in the exhaust column, when being close when formulating the volume, through screwing up set screw, locks the rod cover, then through rotatory accurate carriage release lever, promotes rubber piston through the screw-thread fit between rod cover and the accurate carriage release lever, more accurate removal rubber piston to make the gaseous volume of the hand pump extraction of bleeding more accurate.

(2) This visual gas volumetric hand pump of bleeding, through setting up promotion scale and accurate scale, promote scale and accurate scale and correspond the gas volume setting that the exhaust column extracted according to rubber piston's displacement, can judge the volume of extraction through the promotion scale and the reading of accurate scale that correspond the sealed lid top to control rubber piston's promotion, guarantee the accuracy of final extraction gas volume.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a side cross-sectional view of the present invention;

FIG. 3 is an enlarged view taken at A of FIG. 2 in accordance with the present invention;

FIG. 4 is an enlarged view of a portion of the side wall of the precision motion bar of the present invention.

In the figure: 1. an air pumping cylinder; 2. a connector; 3. a sealing cover; 4. a lifting mechanism; 5. a rubber piston; 6. a rod sleeve; 7. precisely moving the rod; 8. a knob; 9. a set screw; 10. a stabilizing plug; 11. a cylinder body communicating nozzle; 12. rotating the head; 13. a rotary connection nozzle; 14. a communicating hole; 15. a contact gasket; 16. lifting the scales; 17. accurate calibration; 18. and a limiting block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a hand pump for pumping air with visible gas volume, which comprises an air pump cylinder 1, wherein the lower end of the air pump cylinder 1 is provided with a connector 2, the upper end of the air pump cylinder 1 is sleeved with a sealing cover 3, the air pump cylinder 1 is connected with a rubber piston 5 in a sliding manner, the upper end of the rubber piston 5 is fixedly connected with a lifting mechanism 4, the lifting mechanism 4 is slidably mounted at the center of the sealing cover 3, the lifting mechanism 4 comprises a rod sleeve 6 and a precise moving rod 7, the precise moving rod 7 is inserted into the inner cavity of the rod sleeve 6, the lower end of the precise moving rod 7 is rotatably mounted at the center of the upper end of the lifting mechanism 4, the outer wall of the precise moving rod 7 is provided with external threads, the inner walls of the two ends of the rod sleeve 6 are provided with internal threads, the rod sleeve 6 is in threaded connection with the precise moving rod 7, the upper end of the precise moving rod 7 is fixedly connected with a knob 8, the side wall of the sealing cover 3 is in threaded connection with a fixing screw 9, the inner end of the fixing screw 9 penetrates through the sealing cover 3 and is abutted against the outer wall of the rod sleeve 6.

In this embodiment, preferably, the outer wall of the precise moving rod 7 is provided with a lifting scale 16, the thread of the outer wall of the precise moving rod 7 is provided with a precise scale 17, and the upper end of the sealing cover 3 close to the side wall of the rod sleeve 6 is provided with a positioning pointer; through the promotion scale 16 that sets up, promote scale 16 and can correspond the gas volume that round thread removal corresponds, accurate scale 17 sets up the scale at round thread outer wall for ten arrays, can cut apart into ten with the removal of every circle thread, is convenient for to the more accurate reading of extraction gas volume.

In this embodiment, preferably, the rod sleeve 6 is a transparent PVC pipe with a smooth outer wall, and a silicone head is disposed at the inner end of the fixing screw 9; transparent PVC pipe is convenient for accurate carriage release lever 7 outer wall scale read, and the outer wall is smooth to be reduced 6 adsorption affinity that have improved the set screw 9 inner end silica gel head when the moving resistance when extracting gas of rod cover for 6 fixed more firm rod covers, guarantee the accuracy that 7 scales of accurate carriage release lever show.

In this embodiment, preferably, the center of the bottom side of the sealing cover 3 is provided with a stabilizing plug 10, and the stabilizing plug 10 is matched with the upper end of the inner cavity of the air pumping cylinder 1; through the stable stopper 10 that sets up, improve the stability of sealed lid 3 and pump bowl 1 junction, avoid sealed lid 3 to rock and influence the testing result.

In this embodiment, preferably, the connector 2 includes a cylinder communicating nozzle 11, the cylinder communicating nozzle 11 is fixedly installed at the center of the bottom of the air extracting cylinder 1, the cylinder communicating nozzle 11 is communicated with the inner cavity of the air extracting cylinder 1, a rotating head 12 is connected to the outer wall of the cylinder communicating nozzle 11 through a thread, a rotating connecting nozzle 13 is arranged at the lower end of the rotating head 12, a plurality of communication holes 14 are formed in the side wall of the upper end of the rotating connecting nozzle 13, the plurality of communication holes 14 are communicated with the rotating connecting nozzle 13 and the inner cavity of the rotating head 12, a contact sealing gasket 15 is arranged at the upper end of the rotating connecting nozzle 13, and the contact sealing gasket 15 is matched with the bottom of the cylinder communicating nozzle 11; through the rotating head 12 and the cooperation of barrel communicating nozzle 11 that set up, rotate rotating head 12 and can make barrel communicating nozzle 11 and the sealed 15 laminating of contact pad and part, thereby disconnection and the communicating barrel communicating nozzle 11 and the 12 inner chambers of rotating head, when barrel communicating nozzle 11 communicates with the 12 inner chambers of rotating head, swivelling joint nozzle 13 can communicate with 1 inner chamber of aspiration cylinder through the inner chamber of rotating head 12, when avoiding shifting gas, gas in the hand pump of bleeding leaks from barrel communicating nozzle 11, the accuracy of measurement structure has further been guaranteed.

In this embodiment, preferably, a conical recess is formed in the center of the bottom of the inner cavity of the air pump 1, and a conical protrusion matched with the conical recess is formed at the bottom of the rubber piston 5; through the cooperation of the conical depressions and the conical bulges, the gas in the pumping cylinder 1 can be discharged, and the influence of residual gas on the detection result is avoided.

In this embodiment, preferably, the bottom of the sidewall of the rod sleeve 6 is provided with a limit block 18, and the rod sleeve 6 can be effectively prevented from slipping through the set limit block 18.

The working principle and the using process of the utility model are as follows: when the device uses, with connector 2 and the gaseous intercommunication of sample, through 6 work rubber piston 5 of rod cover, scale on up to accurate carriage release lever 7 is close to and treats the extraction volume, screw up set screw 9, lock rod cover 6 through set screw 9, then rotate accurate carriage release lever 7 through knob 8, screw-thread fit through rod cover 6 and accurate carriage release lever 7 promotes rubber piston 5, thereby the removal precision of the rubber piston 5 that the cooperation through the screw thread improves, and then improved the accuracy nature of final extraction gas volume, the accurate numerical value of the gas volume of extraction can be read out through the outside scale of accurate carriage release lever 7.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A hand pump for pumping air with visible air volume, which comprises an air pumping cylinder (1), and is characterized in that: the lower end of the air suction cylinder (1) is provided with a connector (2), a sealing cover (3) is sleeved on the upper end of the air suction cylinder (1), a rubber piston (5) is connected in the air suction cylinder (1) in a sliding mode, a lifting mechanism (4) is fixedly connected to the upper end of the rubber piston (5), the lifting mechanism (4) is installed at the center of the sealing cover (3) in a sliding mode, the lifting mechanism (4) comprises a rod sleeve (6) and an accurate moving rod (7), the accurate moving rod (7) is inserted into an inner cavity of the rod sleeve (6), the lower end of the accurate moving rod (7) can be rotatably installed at the center of the upper end of the lifting mechanism (4), the outer wall of the accurate moving rod (7) is provided with external threads, inner walls of two ends of the rod sleeve (6) are respectively provided with internal threads, the rod sleeve (6) is connected with the accurate moving rod (7) in a threaded mode, a knob (8) is fixedly connected to the upper end of the accurate moving rod (7), the side wall of the sealing cover (3) is in threaded connection with a fixing screw (9), and the inner end of the fixing screw (9) penetrates through the sealing cover (3) to be abutted against the outer wall of the rod sleeve (6).

2. A visual gas volume pumping hand pump as claimed in claim 1, characterised in that: the outer wall of the accurate moving rod (7) is provided with lifting scales (16), the outer wall of the accurate moving rod (7) is provided with accurate scales (17) in a threaded mode, and a positioning pointer is arranged at the position, close to the side wall of the rod sleeve (6), of the upper end of the sealing cover (3).

3. A visual gas volume pumping hand pump as claimed in claim 1, characterised in that: the rod sleeve (6) is a transparent PVC pipe with a smooth outer wall, and a silica gel head is arranged at the inner end of the fixing screw (9).

4. A visual gas volume pumping hand pump as claimed in claim 1, characterised in that: the center of the bottom side of the sealing cover (3) is provided with a stabilizing plug (10), and the stabilizing plug (10) is matched with the upper end of the inner cavity of the air pumping cylinder (1).

5. A visual gas volume pumping hand pump as claimed in claim 1, characterised in that: connector (2) are including barrel intercommunication mouth (11), barrel intercommunication mouth (11) fixed mounting and the bottom center of exhaust column (1), and the inner chamber intercommunication of barrel intercommunication mouth (11) and exhaust column (1), barrel intercommunication mouth (11) outer wall threaded connection has rotating head (12), the lower extreme of rotating head (12) is provided with swivelling joint mouth (13), and the upper end lateral wall of swivelling joint mouth (13) has seted up a plurality of intercommunicating pores (14), and a plurality of intercommunicating pores (14) intercommunication swivelling joint mouth (13) and rotating head (12) inner chamber, the upper end of swivelling joint mouth (13) is provided with the sealed (15) of contact, the sealed bottom that fills up (15) and barrel intercommunication mouth (11) of contact matches mutually.

6. A visual gas volume pumping hand pump as claimed in claim 1, characterised in that: the center of the bottom of the inner cavity of the air pump cylinder (1) is provided with a conical recess, and the bottom of the rubber piston (5) is provided with a conical bulge matched with the conical recess.

7. A visual gas volume pumping hand pump as claimed in claim 1, characterised in that: the bottom of the side wall of the rod sleeve (6) is provided with a limiting block (18).