Large-flux diaphragm type air valve assembly

Abstract

The utility model discloses a large-flux diaphragm type air valve assembly, which comprises a valve seat, a valve cover, air inlet reeds, a pressing plate, an exhaust valve plate and an elastic sheet, and aims to respectively form one-way valve structures in two directions through the air inlet reeds and the exhaust valve plate, and a single group of air inlet reeds are arranged at the center of the valve seat to ensure that air enters in a concentrated manner; a plurality of sets of independent exhaust valve plates are arranged on the periphery of the valve seat, multi-channel parallel exhaust is achieved, the gas circulation efficiency is high, a gas inlet channel and an exhaust channel are completely separated in space, gas medium backflow and gas blow-by are effectively prevented, the overall structure is compact and stable, and the valve is suitable for the large-flux gas conveying environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of gas valve, especially a big flux diaphragm type gas valve assembly. BACKGROUND

[0002] Diaphragm type gas valve assembly is the core component in compressor, vacuum pump, internal combustion engine distribution mechanism and various fluid control systems, and its function is to realize the control to the gas flow direction through the opening and closing movement of valve piece, and the traditional diaphragm valve usually adopts the form that a single inlet valve and a single exhaust valve are matched to work, in order to adapt to the big flow demand, the area of inlet and exhaust hole needs to be increased, and the valve piece of single piece is prone to deformation warping when covering the large area hole, which leads to the phenomenon of sealing, opening and closing lag, and influences the response speed and sealing reliability of the valve. SUMMARY

[0003] In order to overcome the shortage of the background art, the utility model adopts the technical scheme of a big flux diaphragm type gas valve assembly, which comprises a valve seat, a valve cover, an inlet spring piece, a pressing plate, an exhaust valve piece and a spring piece, the valve seat is provided with an inlet cavity and an exhaust hole, one side of the valve seat is connected with the valve cover, the other side is connected with the pressing plate which is distributed in a circle, the inlet spring piece for shielding the inlet cavity is arranged between the valve seat and the valve cover, the exhaust valve piece for shielding the exhaust hole is arranged between the valve seat and the pressing plate, and the spring piece for tightly pressing the exhaust valve piece to the exhaust hole is arranged.

[0004] By adopting the above technical scheme, the inlet spring piece and the exhaust valve piece form two one-way valve structures in two directions respectively, a single group of inlet spring pieces is arranged at the center of the valve seat, so that the gas can be concentrated into, a plurality of independent exhaust valve pieces are arranged around the valve seat, so that the multi-channel parallel exhaust is realized, the gas flow efficiency is high, the inlet channel and the exhaust channel are completely separated in space, the backflow and blow-by of the gas medium are effectively prevented, the overall structure is compact and stable, and it is suitable for the gas conveying environment with large flux.

[0005] The utility model is further provided with an integrally formed outer ring part, an elastic part one and an inner ring part, an opening groove for avoiding the exhaust hole is arranged between the outer ring part and the inner ring part, the outer ring part is clamped between the valve seat and the valve cover, and the inlet cavity is provided with a fan-shaped groove corresponding to the inner ring part.

[0006] By adopting the above technical scheme, the outer ring part is connected to the inner ring part through four groups of elastic parts one which are distributed in a cross shape, the opening groove is naturally formed between the adjacent elastic parts one, the use of the inlet spring is reduced, when the inlet spring piece is installed between the valve cover and the valve seat, the elastic part one is in a compressed state, the inner ring part is uniformly supported, the inner ring part is completely attached to the inlet cavity, and the phenomenon of edge warping of the inlet spring piece is prevented.

[0007] The valve cover is provided with a countersunk groove, and the outer ring part is installed in the countersunk groove.

[0008] Further, the countersunk groove is provided with positioning blocks distributed in a circle, and the outer ring part is provided with gaps corresponding to the positioning blocks.

[0009] By adopting the technical scheme, the outer ring part is sleeved in the countersunk groove, and the positioning blocks prevent the air inlet spring leaf from rotating along the shaft relative to the valve seat, limit the freedom degree of the air inlet spring leaf, and keep the stability of the installation structure.

[0010] The outer ring part is provided with a semicircular surface near the gap.

[0011] By adopting the technical scheme, since the air inlet spring leaf is tangent to the surface of the positioning block through the semicircular surface, the contact area between the air inlet spring leaf and the valve cover is effectively reduced, the problem of local jamming of the air inlet spring leaf in elastic deformation is reduced, and the service life of the air valve is improved.

[0012] One end of the pressing plate is provided with a through hole one, and the other end is provided with a limiting part bent outward, one end of the elastic sheet is provided with a through hole three corresponding to the through hole one, and the other end is provided with an elastic part two bent inward.

[0013] By adopting the technical scheme, the bending directions of the pressing plate and the elastic sheet are opposite, wherein the limiting part turned outward is used for limiting the deformation amount of the exhaust valve sheet and the elastic sheet, and preventing permanent deformation of the two under the impact of airflow; the elastic part two turned inward provides stable closing pressure for the pressing plate.

[0014] The valve seat is provided with limiting grooves distributed in a circle, and the pressing plate is provided with a protruding block one corresponding to the limiting grooves.

[0015] Further, the exhaust valve sheet and the elastic sheet are provided with a protruding block two and a protruding block three corresponding to the limiting grooves.

[0016] By adopting the technical scheme, the protruding block one, the protruding block two and the protruding block three have the function of directional installation, and through cooperation with the limiting grooves, the pressing plate, the exhaust valve sheet and the elastic sheet are effectively prevented from rotating along the shaft relative to the valve seat, and sealing failure of the exhaust hole caused by rotation misplacement is avoided.

[0017] The embodiments of the utility model will be further described below with reference to the drawings. DRAWINGS

[0018] Figure 1 is the front view of the utility model;

[0019] Figure 2 is the rear view of the utility model;

[0020] Figure 3 is the valve seat of the utility model Figure 1 is the sectional view of the view A;

[0021] Figure 4 is the valve seat of the utility model Figure 1 is the local enlarged view of the position B;

[0022] Figure 5 is the valve seat of the utility model Figure 3 is the local enlarged view of the position C;

[0023] Figure 6 is the rear view of the valve seat of the utility model;

[0024] Figure 7 is the structure explosion drawing of the exhaust assembly of the utility model;

[0025] Figure 8 is the bottom view of the pressing plate of the utility model;

[0026] 1-valve seat, 2-valve cover, 3-inlet spring piece, 4-pressing plate, 5-exhaust valve piece, 6-spring piece, 11-inlet cavity, 12-exhaust hole, 13-fan-shaped groove, 14-limiting groove, 21-counterbore groove, 22-positioning block, 31-outer ring part, 32-elastic part one, 33-inner ring part, 34-opening groove, 35-semi-circular surface, 41-through hole one, 42-limiting part, 43-protruding block one, 51-through hole two, 53-protruding block two, 61-through hole three, 62-elastic part two, 63-protruding block three; DETAILED DESCRIPTION

[0027] The embodiments of the utility model will be described below with reference to the drawings. In this process, in order to ensure the explicitness and convenience of the description, we may exaggerate the width of the lines or the size of the constituent elements in the drawings.

[0028] In addition, the terms in the following are defined based on the functions in the utility model, which can be different according to the intention or habit of the user or the user, therefore, the terms are defined based on the whole content of the specification.

[0029] As shown in Figures 1-3 The utility model provides a kind of large-flux diaphragm type air valve assembly, including valve seat 1, valve cover 2, inlet spring piece 3, pressing plate 4, exhaust valve piece 5 and spring piece 6, valve seat 1 is equipped with inlet cavity 11 and exhaust hole 12, one side of valve seat 1 is connected with valve cover 2, the other side is connected with the pressing plate 4 that is circumferentially distributed, inlet spring piece 3 for shielding inlet cavity 11 is equipped between valve seat 1 and valve cover 2, exhaust valve piece 5 for shielding exhaust hole 12 is equipped between valve seat 1 and pressing plate 4, and spring piece 6 for tightly pressing exhaust valve piece 5 exhaust hole 12.

[0030] combinedFigure 5 As shown, in the embodiment, the intake spring 3 is provided with an integrally formed outer ring portion 31, elastic portion one 32 and inner ring portion 33, and the opening groove 34 for avoiding the exhaust hole 12 is arranged between the outer ring portion 31 and the inner ring portion 33, the outer ring portion 31 is clamped between the valve cover 2 and the valve seat 1, the intake cavity 11 is provided with the fan-shaped groove 13 corresponding to the inner ring portion 33, the outer ring portion 31 is connected to the inner ring portion 33 through the four sets of elastic portion one 32 distributed in cross shape, the opening groove 34 is naturally formed between the adjacent elastic portion one 32, the material of the intake spring is reduced, when the intake spring 3 is installed between the valve cover 2 and the valve seat 1, the elastic portion one 32 is in the compressed state, the inner ring portion 33 is uniformly supported by the elasticity, and the inner ring portion 33 is completely attached to the intake cavity 11, and the phenomenon of the intake spring 3 being warped is prevented.

[0031] In combination Figure 4 As shown, in the embodiment, the outer side of the valve cover 2 is provided with the mounting hole threadedly connected with the valve seat 1, and the inner side is provided with the countersunk groove 21, the outer ring portion 31 is installed in the countersunk groove 21, the countersunk groove 21 is provided with the positioning block 22 distributed in the circumferential direction, the outer ring portion 31 is provided with the gap corresponding to the positioning block 22, the outer ring portion 31 is sleeved in the countersunk groove 21, and the positioning block 22 prevents the intake spring 3 from rotating along the axis relative to the valve seat 1, limits the freedom degree of the intake spring 3, maintains the stability of the installation structure, and the outer ring portion 31 is provided with the semicircular surface 35 near the gap, the intake spring 3 is tangent to the surface of the positioning block 22 through the semicircular surface 35, the contact area between the intake spring 3 and the valve cover 2 is effectively reduced, the problem of the intake spring 3 being locally stuck during the elastic deformation is reduced, and the service life of the gas valve is improved.

[0032] In combination Figures 6-8 As shown, in the embodiment, one end of the pressing plate 4 is provided with the through hole one 41, the other end is provided with the limiting portion 42 bent outward, one end of the elastic sheet 6 is provided with the through hole three 61 coaxially distributed with the through hole one 41, the other end is provided with the elastic portion two 62 bent inward, the exhaust valve sheet 5 is provided with the through hole two 51 coaxially distributed with the through hole three 61, the bending directions of the pressing plate 4 and the elastic sheet 6 are opposite, the double-headed bolt is sequentially threaded through the through hole one 41, the through hole two 51 and the through hole three 61, and is threadedly connected to the valve seat 1, and then the nuts are used to tightly press one end of the pressing plate 4, the exhaust valve sheet 5 and the elastic sheet 6 to the valve seat 1 along the double-headed bolt; the bottom views of the pressing plate 4, the exhaust valve sheet 5 and the elastic sheet 6 are the same, the valve seat 1 is provided with the limiting groove 14 distributed in the circumferential direction, the pressing plate 4 is provided with the protrusion one 43 corresponding to the limiting groove 14, the exhaust valve sheet 5 and the elastic sheet 6 are provided with the protrusion two 53 and the protrusion three 63 corresponding to the limiting groove 14, the protrusion one 43, the protrusion two 53 and the protrusion three 63 have the function of directional installation, and are clamped with the limiting groove 14 of the valve seat 1, effectively preventing the pressing plate 4, the exhaust valve sheet 5 and the elastic sheet 6 from rotating along the axis relative to the valve seat 1, and avoiding the sealing failure of the exhaust hole 12 caused by the rotational misplacement.

[0033] The utility model discloses a working principle is, the valve cover 2 and the air inlet spring piece 3 combination forms the air intake assembly, the pressing plate 4, the exhaust valve piece 5 and the spring piece 6 combination forms the exhaust assembly, and the air intake assembly forms the one-way valve structure of two directions opposite with the exhaust assembly, when air intake, the airflow enters through the air intake cavity 11, and the air inlet spring piece 3 is opened outward after overcoming the pre-tightening force of elastic part one 32 by gas thrust, forms the air inlet channel, exhaust valve piece 5 tight pressure and seal exhaust hole 12 at this time, avoid the gas leakage, in contrast, when exhaust, the airflow is discharged through the exhaust hole 12, and exhaust valve piece 5 is opened outward after being driven by gas thrust, and the spring piece 6 elastic deformation and form multiple exhaust channels, at this time, the air inlet spring piece 3 tight pressure and seal the air intake cavity 11, prevent the gas counterflow.

[0034] The above are the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A high-flow-rate diaphragm-type air valve assembly, characterized in that, It includes a valve seat (1), a valve cover (2), an intake spring (3), a pressure plate (4), an exhaust valve plate (5), and a spring (6). The valve seat (1) is provided with an intake chamber (11) and an exhaust hole (12). The valve cover (2) is connected to one side of the valve seat (1), and the pressure plate (4) is connected to the other side in a circular pattern. An intake spring (3) is provided between the valve seat (1) and the valve cover (2) to block the intake chamber (11). An exhaust valve plate (5) is provided between the valve seat (1) and the pressure plate (4) to block the exhaust hole (12), and a spring (6) is provided to press the exhaust valve plate (5) tightly against the exhaust hole (12).

2. The high-flow-rate diaphragm valve assembly according to claim 1, characterized in that: The intake spring (3) is provided with an integrally formed outer ring (31), an elastic part (32) and an inner ring (33). An opening groove (34) for avoiding the exhaust hole (12) is provided between the outer ring (31) and the inner ring (33). The outer ring (31) is engaged between the valve seat (1) and the valve cover (2). The intake chamber (11) is provided with a fan-shaped groove (13) corresponding to the inner ring (33).

3. A high-flow-rate diaphragm valve assembly according to claim 2, characterized in that: The valve cover (2) is provided with a countersunk groove (21), and the outer ring (31) is installed in the countersunk groove (21).

4. A high-flow-rate diaphragm-type air valve assembly according to claim 3, characterized in that: The countersunk groove (21) is provided with circumferentially distributed positioning blocks (22), and the outer ring (31) is provided with a gap corresponding to the positioning blocks (22).

5. A high-flow-rate diaphragm valve assembly according to claim 4, characterized in that: The outer ring (31) has a semi-circular surface (35) near the gap.

6. A high-flow-rate diaphragm valve assembly according to claim 1, characterized in that: One end of the pressure plate (4) is provided with a through hole (41), and the other end is provided with an outwardly bent limiting part (42). One end of the spring sheet (6) is provided with a through hole (61) corresponding to the through hole (41), and the other end is provided with an inwardly bent elastic part (62).

7. A high-flow-rate diaphragm-type air valve assembly according to claim 6, characterized in that: The valve seat (1) is provided with a circumferentially distributed limiting groove (14), and the pressure plate (4) is provided with a protrusion (43) corresponding to the limiting groove (14).

8. A high-flow-rate diaphragm valve assembly according to claim 7, characterized in that: The exhaust valve plate (5) and spring plate (6) are provided with protrusion two (53) and protrusion three (63) corresponding to the limiting groove (14).

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