CN2110726U

CN2110726U - Light exhausting and inflating cylinder

Info

Publication number: CN2110726U
Application number: CN 91225503
Authority: CN
Inventors: 席培根
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-09-19
Filing date: 1991-09-19
Publication date: 1992-07-22

Abstract

The utility model discloses a light inflator with exhaust function, whose barrel base is provided with an exhaust port and an inflating port which have a one-way valve for each. A top cover of the barrel is provided with a vent port. In addition, a pedal spring mechanism and a pedal lever mechanism are provided for labor-saving operation of exhaust and inflation, and the two operating mechanisms can be interchanged. Besides, the vent port can also be used as the exhaust port. Between a piston-rod and the top cover, sliding seal is formed by an O-shaped ring. A piston comprises the O-shaped ring and a sealing cover. When the sealing cover is taken off, the piston also forms a one-way valve structure, fitting the situation that the vent port is used as the exhaust port; when the sealing cover is put on, the sliding seal is formed between the piston-rod and the top cover.

Description

Light exhausting and inflating cylinder

The utility model relates to a kind of light bleeding and inflates the dual-purpose pump of bleeding.

The vacuum freshness retaining of food causes people's interest and attention day by day, now the vacuum pumping device sale price of the vacuum air pump of supplying on the market and vacuum seal wrapping machine and so on is all about thousands of units and even ten thousand yuan, only being suitable for operation in enormous quantities, is inappropriate to general unit and family.Therefore, there is the people to begin to develop the small-sized instrument of bleeding successively, so that vacuum freshness retaining enters among the ordinary family early.On the patented technology that Patent Office in 1991 sponsors is look at meeting, put on display a kind of pump of bleeding, but because it is directly bled with the hand pull or inflates, operation is not too suitable to weak physical person firmly greatly.

Therefore, the purpose of this utility model promptly provides a kind of pump of bleeding of novelty, can adopt foot-operated also available lever, operates light.

For achieving the above object, a kind of light pump of bleeding of the present utility model, comprise the cylindrical tube that has base and top cover, one piston is positioned at cylindrical shell and becomes slipper seal with cylindrical shell, and on being divided in the cylindrical shell, lower chambers, its piston rod stretches out the cylindrical shell top cover, top cover has a ventilating hole to be communicated with cylindrical shell upper chamber, is provided with the relief opening and the bleeding point that are communicated with the cylindrical shell lower chambers on the cylindrical shell base, respectively is provided with an one-way valve in relief opening and the bleeding point, during piston stroking upward, the relief opening closed check valve, the bleeding point one-way valve is opened, during descent of piston, the relief opening one-way valve is opened, the bleeding point closed check valve; A pedal is removably installed on the piston rod top, and one resets pressure spring between pedal and top cover and round piston rod; One ring is contained on the cylindrical shell base and can rotates in vertical plane; One end of one lever has a hook hand that can hook ring, can be installed in the piston rod top near the lever middle part of hook hand after pedal and Returnning spring unload.

This structure has been arranged, and the utility model can adopt lever principle to operate again with foot-operated in use, has saved a large amount of muscle power, and old weak person also can use like a cork.

Be described in detail below in conjunction with drawings and Examples, so that advantage of the present utility model and characteristics are had further understanding and understanding.

Fig. 1 is a sectional view of the present utility model, and its mode of operation is foot-operated;

Fig. 2 is another schematic representation of the present utility model, and its mode of operation is a Lever type;

Situation when Fig. 3 changes bleeding point into for ventilating hole, mode of operation wherein are foot-operated.

Please referring to Fig. 1, the pump of bleeding comprises cylindrical tube 3, and cylindrical shell 3 has top cover 1 and base 7.One piston 14 is positioned at cylindrical shell 3 and cylinder lumen is divided into upper chamber 16 and lower chambers 8, and piston rod 15 passes top cover 1, and top cover 1 has a ventilating hole 18 to communicate with upper chamber 16.

Base 7 has a relief opening 9 and a bleeding point 6 to be connected with lower chambers 8 by passage separately respectively, and an one-way valve 10,5 is respectively arranged in relief opening 9 and the bleeding point 6, and one-way valve 10,5 is made up of ball and spring.

Piston 14 is middle dumbbell shaped structure of dwindling, and an O type is looped around the middle reentrant part of reduced, and piston 14 bottoms have some through holes 12 to communicate with lower chambers 8, and a sealing cover 11 adopts thread fiting mode to be fixed on piston 14 bottoms and to seal through hole 12.At this moment, O type ring 13 makes between piston 14 and cylindrical shell 3 sidewalls and forms slipper seal.When piston 14 was up, exhaust check valve 10 was closed, and the one-way valve 5 of bleeding is opened, and carries out pumping process this moment; When descent of piston, exhaust check valve 10 is opened, and the one-way valve 5 of bleeding is closed, piston 14 with the air in the lower chambers 8 by outside relief opening 9 expelling tubes.Relief opening 9 and bleeding point 6 and a flexible pipe 17,2 join and are beneficial to exhaust (or inflating) and bleed (flexible pipe of will bleeding is connected with container to be vacuumized).If desired, the structure of bleeding point 6 and relief opening 9 and size can be made identically, one of 2,17 need of flexible pipe just like this.Ventilating hole 18 makes upper chamber 16 communicate with atmosphere, in order to avoid upper chamber 16 produces negative pressure, makes the operation effort.

Piston rod 15 tops adopt worm structure to be connected with a pedal 21, and one resets pressure spring 20 between pedal 21 and top cover 1 and round piston rod.The user can operate with foot-operated mode, loosens after pin is stepped on, and pressure spring 20 can make piston up automatically, gets back to a high position.Howed with hand pull piston rod 15 is laborsaving than direct with foot-operated.

Another kind of operating device please see Figure 2, after the pedal among Fig. 1 21 and spring 20 are taken off from piston rod 15, loads onto a lever 22, and the left end of lever 22 has a hook hand 23, and hook hand 23 hooks ring 4.Ring 4 bottoms are through on the base 7 and can rotate in vertical plane.This Lever type operating device is also very laborsaving.The purpose of taking off spring 20 is to eliminate the spring force that will overcome when pressing lever 22.Do not rock when operating for making, the pump of bleeding also can be screwed on the ground.

When the foot-operated mode among employing Fig. 1, ring 4 can be put to horizontal position, with firmly foot-operated, the pump of bleeding when making operation is difficult for rocking.

Among Fig. 3 ventilating hole is connected a flexible pipe 24 as bleeding point.If adopt this mode, then the sealing cover 11 of piston 14 bottoms to be taken off, remove obstruction to through hole 12, O type ring 13 plays the effect of an one-way valve at this moment.Also carry out slipper seals between top cover 1 and the piston rod 15 in addition, and bleeding point 6 can be sealed and inoperative with plug 25 with O type ring 19.When descent of piston, O type ring 13 is positioned at the recessed upper limb of piston 14 intermediate portions, seal the passage between upper chamber 16 and the lower chambers 8, along with upper chamber 16 increases, wherein negative pressure increases, to treat air in the vacuum-pumping container by flexible pipe 24 and ventilating hole 18 suction upper chamber 16, the one-way valve 10 of relief opening is in opening state simultaneously, and the air that lower chambers is 8 li is by outside piston 14 expelling tubes; And when piston 14 is up, O type ring 13 slides into the lower edge of piston 14 middle reentrant part, and pressure constantly increases in the upper chamber 16, owing to be communicated with by through hole 12 between upper chamber 16 and the lower chambers 8, so the air of upper chamber 16 enters in the lower chambers 8, this moment, exhaust check valve 10 was closed.Adopt ventilating hole 18 as bleeding point to foot-operated mode advantageous particularly because when container reaches the certain vacuum degree after, bleed and operate and will more require great effort, and piston 14 when descending if pumping process is then just in time consistent with foot-operated power thrusts.

If desired, the size of ventilating hole 18 can be made identically with bleeding point 6, flexible pipe 24 and flexible pipe 2 are replaceable or as long as one like this.

Claims

1, a kind of light pump of bleeding, comprise the cylindrical tube that has base and top cover, one piston is positioned at cylindrical shell and also with between cylindrical shell becomes slipper seal, and on being divided in the cylindrical shell, lower chambers, its piston rod stretches out the cylindrical shell top cover, top cover has a ventilating hole to be communicated with cylindrical shell upper chamber, on the cylindrical shell base, be provided with the relief opening and the bleeding point that are communicated with the cylindrical shell lower chambers, respectively be provided with an one-way valve in relief opening and the bleeding point, during piston stroking upward, the relief opening closed check valve, the bleeding point one-way valve is opened, during descent of piston, the relief opening one-way valve is opened, the bleeding point closed check valve; A pedal is removably installed on the piston rod top, and one resets pressure spring between pedal and top cover and round piston rod; One ring is contained on the cylindrical shell base and can rotates in vertical plane; One end of one lever has a hook hand that can hook ring, can be installed in the piston rod top near the lever middle part of hook hand after pedal and Returnning spring unload.

2, the pump of bleeding as claimed in claim 1 is characterized in that, described bleeding point and relief opening respectively are connected to a flexible pipe.

3, the pump of bleeding as claimed in claim 1, it is characterized in that, piston is the dumbbell shape that mid diameter dwindles, and in the reentrant part, the piston bottom had plurality of opening to be communicated with lower chambers in the middle of O type circle was looped around, and have a sealing cover with screw-thread fit be fixed on the piston bottom face, when sealing cover takes off back piston and O type ring is promptly formed an one-way valve structures, when piston stroking upward, one-way valve is opened, when piston stroking upward, closed check valve; Also realize slipper seal between piston rod and the top cover between piston rod and the top cover by O type ring; A ventilating hole and a flexible pipe join; Bleeding point is sealed by a plug.

4, the pump of bleeding as claimed in claim 3 is characterized in that, the size of described ventilating hole is big or small identical with bleeding point.