CN214367757U

CN214367757U - Air blower emptying valve

Info

Publication number: CN214367757U
Application number: CN202021792399.9U
Authority: CN
Inventors: 何东; 江力华
Original assignee: Zhejiang Yigete Machinery Manufacturing Co Ltd
Current assignee: Zhejiang Yigete Machinery Manufacturing Co Ltd
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2021-10-08
Anticipated expiration: 2030-08-25

Abstract

The utility model discloses an air-blower emptying valve, including valve body, upper cover and valve plate, the valve body with the cooperation forms the valve pocket between the upper cover, be equipped with the intercommunication respectively on the valve body the air inlet and the gas outlet of valve pocket, be equipped with the diaphragm in the valve pocket, the valve plate with connect through the connecting rod between the diaphragm, the valve plate with the cooperation is opened and close to the air inlet, the diaphragm with the cooperation forms the control chamber between the upper cover, the upper cover is equipped with the intercommunication the control chamber and control the through-hole of atmospheric pressure in the control chamber, on cover and be equipped with the location axle, the location axle passes the upper cover and with the bottom counterbalance cooperation of diaphragm, the location axle can be followed axial displacement and stretched into with the change length in the control chamber. The utility model discloses possess simple structure, the gas tightness good and application scope wide advantage.

Description

Air blower emptying valve

Technical Field

The utility model relates to an air-blower technical field, in particular to air-blower atmospheric valve.

Background

The blower is a machine which increases the pressure of gas and discharges the gas by means of input mechanical energy, and is a driven fluid machine. The blow valve acts as a protective element for the centrifugal blower to prevent surge during start-up, shut-down and operation of the blower, and to avoid damage to the blower. The blow-down valve that centrifugal blower used in the existing market generally adopts electronic or pneumatic valve control, however, electronic valve reaction rate is slower, and pneumatic valve needs external air supply. This makes the structure of the blow-down valve complicated and costly; in addition, the emptying valves on the market mainly have the defects that the sealing effect of the diaphragm is poor and the leakage exists, and the back pressure of the diaphragm of each type of emptying valve is fixed, so that the emptying valve can only be applied to a certain air blower and cannot be adjusted, and the application range is narrow.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art's defect and not enough, provide an air-blower emptying valve, possess simple structure, the gas tightness is good and application scope is wide advantage.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides an air-blower emptying valve, includes valve body, upper cover and valve plate, the valve body with the cooperation forms the valve pocket between the upper cover, be equipped with the intercommunication respectively on the valve body the air inlet and the gas outlet of valve pocket, be equipped with the diaphragm in the valve pocket, the valve plate with connect through the connecting rod between the diaphragm, the valve plate with the cooperation is opened and close to the air inlet, the diaphragm with the cooperation forms the control chamber between the upper cover, the upper cover is equipped with the intercommunication control chamber and control the through-hole of atmospheric pressure in the control chamber, on cover and be equipped with the location axle, the location axle passes the upper cover and with the bottom counterbalance cooperation of diaphragm, axial displacement can be followed to the location axle in order to change to stretch into length in the control chamber.

Furthermore, the positioning shaft is in sliding fit with the upper cover, and a limit nut is connected to the top end of the positioning shaft in a threaded manner; the positioning shaft is convenient to connect, and the length of the positioning shaft is convenient to adjust along the axial direction.

Furthermore, the connecting rod penetrates through the membrane and is arranged corresponding to the positioning shaft, and a guide hole in clearance fit with the bottom end of the positioning shaft is formed in the connecting rod; the positioning shaft can move stably and reliably without deviation.

Furthermore, a balance channel is formed in the positioning shaft, and two ends of the balance channel are respectively communicated with the control cavity and the inner cavity of the guide hole; the air pressure in the inner cavity of the guide hole is balanced, so that the influence on the stability of the movement caused by different pressures at the two ends of the positioning shaft is avoided, and the movement is stable.

Furthermore, a limiting block matched with the upper cover stop is convexly arranged on the positioning shaft; the adjustment is convenient, the shortest distance of the positioning shaft extending into the control cavity is limited, and the minimum pressure of the control cavity is ensured.

Furthermore, a pressure plate and a supporting plate are fixed at the top end of the connecting rod, and the pressure plate and the supporting plate are respectively arranged on the upper end face and the lower end face of the bottom of the diaphragm; the connection between the diaphragm and the connecting rod is firm and convenient.

Furthermore, a guide ring is arranged in the valve body, and the bottom end of the connecting rod extends along the axial direction and is in clearance fit with the guide ring; the connecting rod is ensured to move along the axial direction all the time without deviation or inclination, so that the valve plate and the air inlet are kept sealed, and the sealing performance is improved.

Furthermore, a sealing gasket which is in sealing fit with the air inlet is embedded on the valve plate; the sealing performance is improved.

Furthermore, the diaphragm is basin-shaped, and the edge of the diaphragm is pressed between the valve body and the upper cover; firm connection and improved sealing performance.

The utility model has the advantages that: a control cavity is formed between the diaphragm and the upper cover in a matching way, the upper cover is provided with a through hole which is communicated with the control cavity and controls the air pressure in the control cavity, the upper cover is provided with a positioning shaft, and the positioning shaft penetrates through the upper cover and is matched with the bottom of the diaphragm in an abutting way; when the valve plate is used, the air pressure in the control cavity is controlled through the through hole, when the air pressure is increased by introducing air into the through hole, the volume of the control cavity is increased, the diaphragm is deformed, the connecting rod moves downwards, and the valve plate also moves towards the air inlet and closes the air inlet; when the air pressure is reduced when the through hole discharges air, the volume of the control cavity is reduced, the diaphragm deforms, so that the connecting rod moves upwards, the valve plate also moves upwards and closes the air inlet, and finally the bottom of the diaphragm abuts against the positioning shaft, so that the diaphragm is kept at a set deformation position and is ensured to be in a set back pressure; the axial position of the positioning shaft is moved, the length of the positioning shaft extending into the control cavity is changed, so that the relative distance between the positioning shaft and the bottom of the diaphragm is adjusted, the deformable size of the diaphragm is changed, the corresponding control cavity can be adaptively increased or decreased, and the back pressure value of the control cavity is finally adjusted, so that the emptying valve is suitable for different machine types or different working conditions, and the application range is wider; generally, the utility model discloses possess simple structure, the gas tightness is good and application scope is wide advantage.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Shown in the figure: 1-a valve body; 1.1-valve cavity; 1.2-gas inlet; 1.3-gas outlet; 1.4-guide ring; 2-covering the upper cover; 3-a valve plate; 4-a membrane; 4.1-control chamber; 4.2-through holes; 5-a connecting rod; 5.1-a pilot hole; 6-positioning the shaft; 6.1-balance channel; 6.2-a limiting block; 7-a limit nut; 8-pressing a plate; 9-a supporting plate; 10-a seal gasket; 11-O-ring; 12-a fastening nut; 13-positioning sleeve.

Detailed Description

For a more intuitive and complete understanding of the technical solution of the present invention, the following non-limiting characteristic description is now performed by combining the drawings of the present invention:

as shown in fig. 1, an air blower vent valve comprises a valve body 1, an upper cover 2 and a valve plate 3, a valve cavity 1.1 is formed between the valve body 1 and the upper cover 2 in a matched mode, an air inlet 1.2 and an air outlet 1.3 which are respectively communicated with the valve cavity 1.1 are arranged on the valve body 1, a diaphragm 4 is arranged in the valve cavity 1.1, the valve plate 3 and the diaphragm 4 are connected through a connecting rod 5, the valve plate 3 is matched with the air inlet 1.2 in an opening and closing mode, a control cavity 4.1 is formed between the diaphragm 4 and the upper cover 2 in a matched mode, the upper cover 2 is provided with a through hole 4.2 which is communicated with the control cavity 4.1 and controls the air pressure in the control cavity 4.1, a positioning shaft 6 is arranged on the upper cover 2, the positioning shaft 6 penetrates through the upper cover 2 and is matched with the bottom of the diaphragm 4 in an abutting mode, and the positioning shaft 6 can move axially to change the length of extending into the control cavity 4.1.

Preferably, two through holes 4.2 are formed, one is used as an air charging hole, and the other is used as an air discharging hole, so that the connection and the control are convenient.

Specifically, the valve body 1 and the upper cover 2 are fixedly connected through a plurality of screws.

The connecting rod 5 penetrates through the membrane 4 and is arranged corresponding to the positioning shaft 6, and a guide hole 5.1 in clearance fit with the bottom end of the positioning shaft 6 is formed in the connecting rod 5; specifically, the guide hole 5.1 is a blind hole formed in the center of the top end of the connecting rod 5.

The positioning shaft 6 is in sliding fit with the upper cover 2, and the top end of the positioning shaft 6 is in threaded connection with a limiting nut 7; a balance channel 6.1 is arranged in the positioning shaft 6, and two ends of the balance channel 6.1 are respectively communicated with the inner cavities of the control cavity 4.1 and the guide hole 5.1.

Specifically, be equipped with locking gasket between stop nut 7 and the upper cover 2, be equipped with O type circle 11 between location axle 6 and the cooperation of upper cover 2, guarantee control chamber 4.1's leakproofness.

A limiting block 6.2 matched with the stop of the upper cover 2 is convexly arranged on the positioning shaft 6; preferably, the upper cover 2 is provided with a step matched with the stop block 6.2 in a stop way.

A pressure plate 8 and a supporting plate 9 are fixed at the top end of the connecting rod 5, and the pressure plate 8 and the supporting plate 9 are respectively arranged on the upper end face and the lower end face of the bottom of the diaphragm 4; specifically, the top end of the connecting rod 5 is in threaded connection with a fastening nut 12, and the fastening nut 12 fixes the pressure plate 8, the bottom of the diaphragm 4 and the supporting plate 9 on the connecting rod 5 in sequence.

A guide ring 1.4 is arranged in the valve body 1, and the bottom end of the connecting rod 5 extends along the axial direction and is in clearance fit with the guide ring 1.4; specifically, the guide ring 1.4 is integrally arranged in the air inlet 1.2 through the connecting rib, and the positioning sleeve 13 is sleeved between the guide ring 1.4 and the connecting rod 5, so that the connecting rod 5 is ensured to stably move, the abrasion is reduced, and the service life is prolonged.

Specifically, the valve plate 3 is fixed in the middle of the connecting rod 5 through another fastening nut 12, a locking gasket is arranged between the fastening nut 12 and the valve plate 3, and an O-shaped ring 11 is also arranged between the valve plate 3 and the connecting rod 5, so that the sealing performance of the air inlet 1.2 is ensured.

The valve plate 3 is embedded with a sealing gasket 10 which is in sealing fit with the air inlet 1.2.

The diaphragm 4 is basin-shaped, and the edge of the diaphragm 4 is pressed between the valve body 1 and the upper cover 2.

The utility model discloses a concrete theory of operation as follows: normally, air is exhausted from the control cavity 4.1, and the air inlet 1.2 is in a normally open state; when the valve is used, when air is introduced from the through hole 4.2 to increase the air pressure of the control cavity 4.1, the volume of the control cavity 4.1 is increased, the diaphragm 4 is deformed and expands outwards, the connecting rod 5 moves downwards along the axial direction under the matching of the guide hole 5.1 to the positioning shaft 6 and the guide ring 1.4 to the connecting rod 5, and the valve plate 3 also moves towards the air inlet 1.2 and closes the air inlet 1.2; when gas is discharged from the through hole 4.2 and the air pressure is reduced, the volume of the control cavity 4.1 is reduced, the diaphragm 4 deforms and collapses inwards, the connecting rod 5 moves upwards along the axial direction under the matching of the guide hole 5.1 to the positioning shaft 6 and the matching of the guide ring 1.4 to the connecting rod 5, the valve plate 3 also moves upwards and closes the air inlet 1.2, and finally the bottom of the diaphragm 4 abuts against the positioning shaft 6, so that the diaphragm 4 is kept at a set deformation position and is ensured to be in a set back pressure; through rotating stop nut 7 to change location axle 6 in axial position, the length in stretching into control chamber 4.1 is changed, thereby the relative distance of location axle 6 with 4 bottoms of diaphragm has been adjusted, but has changed the diaphragm 4 relative deformation size, the increase or the reduction that corresponding control chamber 4.1 also can adapt to have finally adjusted control chamber 4.1 backpressure value, make this atmospheric valve be suitable for different models or different operating modes, application scope is wider.

Above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, characteristics and principle according to the claims of the present invention are included in the claims of the present invention.

Claims

1. An air blower emptying valve comprises a valve body (1), an upper cover (2) and a valve plate (3), wherein the valve body (1) and the upper cover (2) are matched to form a valve cavity (1.1), the valve body (1) is provided with an air inlet (1.2) and an air outlet (1.3) which are respectively communicated with the valve cavity (1.1), a diaphragm (4) is arranged in the valve cavity (1.1), the valve plate (3) and the diaphragm (4) are connected through a connecting rod (5), the valve plate (3) and the air inlet (1.2) are matched in an opening and closing way,

the method is characterized in that: diaphragm (4) with the cooperation forms control chamber (4.1) between upper cover (2), upper cover (2) are equipped with the intercommunication control chamber (4.1) and control through-hole (4.2) of control chamber (4.1) internal gas pressure, be equipped with location axle (6) on upper cover (2), location axle (6) pass upper cover (2) and with the bottom of diaphragm (4) offsets the cooperation, location axle (6) can be followed axial displacement and stretched into in order to change length in the control chamber (4.1).

2. A blower vent valve as set forth in claim 1, wherein: the positioning shaft (6) is in sliding fit with the upper cover (2), and the top end of the positioning shaft (6) is in threaded connection with a limiting nut (7).

3. A blower vent valve as set forth in claim 1, wherein: the connecting rod (5) penetrates through the diaphragm (4) and is correspondingly arranged with the positioning shaft (6), and a guide hole (5.1) in clearance fit with the bottom end of the positioning shaft (6) is formed in the connecting rod (5).

4. A blower vent valve as set forth in claim 3, wherein: a balance channel (6.1) is arranged in the positioning shaft (6), and two ends of the balance channel (6.1) are respectively communicated with the control cavity (4.1) and the inner cavity of the guide hole (5.1).

5. A blower vent valve as set forth in claim 1, wherein: the positioning shaft (6) is convexly provided with a limiting block (6.2) matched with the stop of the upper cover (2).

6. A blower vent valve as set forth in claim 1, wherein: the top end of the connecting rod (5) is fixed with a pressing plate (8) and a supporting plate (9), and the pressing plate (8) and the supporting plate (9) are respectively arranged on the upper end face and the lower end face of the bottom of the diaphragm (4).

7. A blower vent valve as set forth in claim 6, wherein: be equipped with guide ring (1.4) in valve body (1), the bottom of connecting rod (5) along axial extension and with guide ring (1.4) clearance fit.

8. A blower vent valve as set forth in claim 1, wherein: and a sealing gasket (10) which is in sealing fit with the air inlet (1.2) is embedded in the valve plate (3).

9. A blower vent valve as set forth in claim 1, wherein: the diaphragm (4) is in a basin shape, and the edge of the diaphragm (4) is pressed between the valve body (1) and the upper cover (2).