CN100343511C

CN100343511C - Dual-tube inflator

Info

Publication number: CN100343511C
Application number: CNB2004100356101A
Authority: CN
Inventors: 王乃令; 王伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-08-25
Filing date: 2004-08-25
Publication date: 2007-10-17
Anticipated expiration: 2024-08-25
Also published as: CN1598307A

Abstract

The present invention discloses a double-tube inflator which comprises an inner tube and an outer tube sheathed on the outer wall of the inner tube, wherein the upper end of the outer tube is enclosed, and the lower end is provided with a guiding hoop; the lower end of the inner tube is fixedly connected with an air outlet base, and the upper end is provided with an air changing valve. An annular first groove is arranged between an upper valve body and a lower valve body which are detachably connected. A sealing leather cup is movably clamped and sheathed in the first groove, and the sealing leather cup is sealed with the inner wall of the outer tube in an air-tight mode. An annular second groove is arranged on the outer peripheral surface of the lower valve body, and a sealing ring is arranged in the second groove. Gaps are arranged among the axial direction and the radical direction of the sealing ring and the valve bodies, and an axial through hole is arranged between the first groove and the second groove. The present invention overcomes the problem that the air is easy to be leaked so that the air outlet pressure is low after the sealing function of the sealing leather cup is ineffective. The present invention has the advantages of novel structure, large air outlet pressure, convenient use and good durability. The lubricating condition of the sealing ring and the sealing leather cup is improved.

Description

Double-barreled pump

Technical field

The present invention relates to the pump technical field, relate in particular to have in pipe and outer tube, interior pipe upper end is provided with the double-barreled pump of scavenging air valve.

Background technique

The purposes of pump is very extensive.Known double-barreled pump, by scavenging air valve with the cavity of outer tube and interior pipe be divided into active chamber at outer tube, at the air storing cavity of interior pipe and the annular air aspiration cavity between interior pipe and outer tube.Sealing cup be fastened in movably be located at the valve body circumferential surface first groove in and with the outer tube wall hermetic seal.During work because air aspiration cavity and active chamber only realize that by sealing cup sealing cuts off, in case sealing cup because of wear out failure, active chamber will leak gas, thus it is low to go out atmospheric pressure, makes troubles to use.In addition, be positioned at the guiding hoop of outer tube lower end, not only play guiding, but also playing the effect that is communicated with atmosphere and air aspiration cavity, then guide effect is bad for the excesssive gap of guiding hoop and outer wall of inner tube, when outer tube moves axially, make sealing cup generation deflection easily, reduce sealing effect; And the gap is too small, and then breathing process has some setbacks, and can feel painstaking when people use.

Summary of the invention

Technical problem to be solved by this invention is: provide a kind of and go out that atmospheric pressure is big, the service-strong double-barreled pump, after the seal action that overcomes sealing cup lost efficacy, gas leakage caused out the low problem of atmospheric pressure easily.

For solving the problems of the technologies described above, technological scheme of the present invention is: double-barreled pump comprises the interior outer tube of managing and being sheathed on its outer wall; Outer tube upper end closed, its lower end are provided with the guiding hoop; In the pipe lower end fixedly connected with the base of giving vent to anger, be provided with scavenging air valve on it, scavenging air valve with the cavity of outer tube and interior pipe be divided into active chamber at outer tube, at the air storing cavity of interior pipe and the annular air aspiration cavity between interior pipe and outer tube; Described scavenging air valve comprises that valve body, control air are from the unidirectional spool that enters air storing cavity of active chamber, valve body comprises upper valve body and the following valve body that removably connects, have annular first groove between upper valve body and the following valve body, sealing cup be fastened in movably in first groove and with the outer tube wall hermetic seal; Be provided with annular second groove on the outer circumferential face of following valve body, be provided with seal ring in second groove, seal ring is axially and radially all have the gap with following valve body; Be provided with axial hole between first groove and second groove.

Owing to adopted technique scheme, on the outer circumferential face of following valve body, be provided with annular second groove, be provided with seal ring in second groove, sealing cup, seal ring is cut apart active chamber and air aspiration cavity sealing together, thereby guarantee after the seal action of sealing cup lost efficacy, still can realize effective seal by seal ring, simultaneously, because being arranged, seal ring does the sealing of second road, the lubricating grease that leaks into the air aspiration cavity outer tube inner wall through sealing cup more is trapped in second groove, thereby improved the lubricating condition of seal ring and sealing cup, prevented that it from accelerate wearing and tearing because of losing oil, improved its serviceability.Its groundwork process is: when pump was air-breathing, the volume of active chamber increased, and pressure reduces; The volume of air aspiration cavity reduces, and pressure increases; The constancy of volume of air storing cavity, pressure is constant.Because active chamber pressure is lower than the pressure of air storing cavity, thereby spool cuts off active chamber and air storing cavity; Meanwhile, because the growth and decline of active chamber and air aspiration cavity pressure, sealing cup and seal ring will upwards float in first groove and second groove respectively vertically, air from air aspiration cavity will enter second groove from the axial hole between first groove and second groove by the gap between seal ring and the valve body, enter active chamber by the gap between second groove and the sealing cup again; When pump was calmed the anger, sealing cup and seal ring will be pressed on the lower end surface of first groove and second groove respectively, thus being communicated with of blocking-up active chamber and air aspiration cavity, and the air of assurance active chamber is opened spool, enters air storing cavity smoothly.

As a kind of improvement, described guiding hoop is provided with can be with the inlet hole of outside atmosphere and air aspiration cavity connection, and guiding hoop and outer wall of inner tube Spielpassung had both guaranteed good guide effect, can guarantee that again breathing process is smooth and easy, people are used can not feel painstaking.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is the structure sectional view of the embodiment of the invention;

Fig. 2 is the stereogram of middle valve body embodiment illustrated in fig. 1.

Embodiment

As shown in Figure 1, double-barreled pump, pipe 8 and the outer tube 3 that is sheathed on its outer wall in comprising; Pegging graft and be fixed with in outer tube 3 upper ends can be with the capping 2 of its sealing, and handle 1 is fixed in the capping 2, and a side of capping 2 is provided with the hangers 12 that air hose 11 can be hung up, its objective is to be convenient for carrying; Certainly, also capping 2 and outer tube 3 can be made as one.Outer tube 3 lower ends are provided with guiding hoop 9; Guiding hoop 9 and interior pipe 3 outer wall Spielpassung, guiding hoop 9 are provided with the inlet hole that outside atmosphere and air aspiration cavity C can be communicated with, and guiding hoop 9 also can be made as one with outer tube 3.In pipe 8 lower ends fixedly connected with the base 10 of giving vent to anger, be provided with scavenging air valve on it, the active chamber a that scavenging air valve is divided into the cavity of outer tube 3 and interior pipe 8 at outer tube 3, at the air storing cavity b of interior pipe 8 and the annular air aspiration cavity c between interior pipe 8 and outer tube 3; Described scavenging air valve comprises that valve body 5, control air are from the unidirectional spool 7 that enters air storing cavity b of active chamber a; Valve body 5 comprises upper valve body 55 and the following valve body 56 that is threaded, and takes its connection apart, can spool 7 be installed in the upper and

lower valve body

55,56 easily.Has annular first groove 51 between upper valve body 55 and the following valve body 56, sealing cup 4 be fastened in movably in first groove 51 and with outer tube 3 inwall hermetic seals, on the outer circumferential face of following valve body 56, be provided with annular second groove 52, be provided with seal ring 6 in second groove 52, seal ring 6 is axially and radially all have the gap with following valve body 56; Be provided with axial hole 53 between first groove 51 and second groove 52.As shown in Figure 2, the upper-end surface of the firstth groove 51 is provided with make progress axially extended vent or vent slot 54.The purpose that vent or vent slot 54 are set is: when sealing cup 5 was close to first groove, 51 upper-end surfaces, the air in the air aspiration cavity c entered active chamber a by it.

When pump was air-breathing, the volume of active chamber a increased, and pressure reduces; The volume of air aspiration cavity c reduces, and pressure increases; The constancy of volume of air storing cavity b, pressure is constant.Because active chamber a pressure is lower than the pressure of air storing cavity b, thereby spool 7 cuts off active chamber a and air storing cavity b; Meanwhile, because active chamber a pressure reduces, air aspiration cavity c pressure increases, so sealing cup 4 and seal ring 6 will upwards float in first groove 51 and second groove 52 respectively vertically, air from air aspiration cavity c will enter second groove 52 from the axial hole 53 between first groove 51 and second groove 52 by the gap between seal ring 6 and the valve body 5, enter active chamber a by the gap between second groove 52 and the sealing cup 4 again.

When pump was calmed the anger, sealing cup 4 and seal ring 6 will be pressed on the lower end surface of first groove 51 and second groove 52 respectively, thus being communicated with of blocking-up active chamber a and air aspiration cavity c, and the air of assurance active chamber a is opened spool 7, enters air storing cavity b smoothly.On the outer circumferential face of valve body 5, be provided with annular second groove 51, be provided with seal ring 6 in second groove 51, sealing cup 4, seal ring 6 are cut apart active chamber a and air aspiration cavity c sealing together, thereby guarantee after the seal action of sealing cup 4 lost efficacy, still can realize effective seal by seal ring 6.Simultaneously, because have seal ring 6 to do the sealing of second road, the lubricating grease that leaks into air aspiration cavity c urceolus 3 inwalls through sealing cup 4 more is trapped in second groove 52, has improved seal ring 6 and sealing cup 4 lubricating condition, prevent that it from accelerate wearing and tearing because of losing oil, improves its serviceability.Guiding hoop 9 is provided with can be with the inlet hole of outside atmosphere and air aspiration cavity c connection, and guiding hoop 9 and interior pipe 8 outer wall Spielpassung had both guaranteed good steering capability, can guarantee that again breathing process is smooth and easy, and when people used, it was painstaking can not feel.

Claims

1, double-barreled pump comprises interior pipe (8) and is sheathed on the outer tube (3) of its outer wall; Outer tube (8) upper end closed, its lower end are provided with guiding hoop (9); Fixedly connected with the base of giving vent to anger (10) in interior pipe (8) lower end, its upper end is provided with scavenging air valve, scavenging air valve the cavity of outer tube (3) and interior pipe (8) is divided into active chamber (a), the air storing cavity (b) that is positioned at pipe (8) that is positioned at outer tube (3) and be positioned at pipe (8) and outer tube (3) between annular air aspiration cavity (c); Described scavenging air valve comprises valve body (5), the control air is from the unidirectional spool (7) that enters air storing cavity (b) of active chamber (a), valve body (5) comprises upper valve body (55) and the following valve body (56) that removably connects, has annular first groove (51) between upper valve body (55) and the following valve body (56), sealing cup (4) is fastened in first groove (51) movably, and with outer tube (3) inwall hermetic seal, it is characterized in that: on the outer circumferential face of following valve body (56), be provided with annular second groove (52), be provided with seal ring (6) in second groove (52), seal ring (6) is axially and radially all have the gap with following valve body (56); Be axially arranged with through hole (53) between first groove (51) and second groove (52).

2, double-barreled pump as claimed in claim 1 is characterized in that: described guiding hoop (9) is provided with can be with the inlet hole of outside atmosphere and air aspiration cavity (C) connection, guiding hoop (9) and interior pipe (3) outer wall Spielpassung.

3, double-barreled pump as claimed in claim 1 or 2 is characterized in that: peg graft and fixedly capping (2) in described outer tube (3) upper end.

4, double-barreled pump as claimed in claim 3 is characterized in that: a side of described capping (2) is provided with the hangers (12) that air hose (11) can be hung up.

5, double-barreled pump as claimed in claim 1 is characterized in that: the upper-end surface of first groove (51) is provided with make progress axially extended vent or vent slot (54).