CN211820918U

CN211820918U - Breather valve

Info

Publication number: CN211820918U
Application number: CN202020344515.4U
Authority: CN
Inventors: 林众
Original assignee: Zhejiang Zhenchao Petrochemical Equipment Co Ltd
Current assignee: Zhejiang Zhenchao Petrochemical Equipment Co Ltd
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2020-10-30
Anticipated expiration: 2030-03-18

Abstract

The utility model relates to a breather valve, a valve seat comprises a flange ring, a flower scattering opening, an air suction window and an air suction fan; the upper part of the flange ring is connected with a flower scattering opening, and the flower scattering opening expands outwards while expanding upwards; the inner wall of the flower scattering opening is provided with an air suction window, the upper part of the air suction window is movably connected with an air suction fan, and the air suction fan covers the air suction window when free; the valve cover is connected with the limiting part and clamped in the flange ring, the limiting part comprises a clamping ring and a fixing column, the outer wall of the fixing column is attached to the inner wall of the flange ring, and the length of the fixing column ensures that the valve cover and the limiting part have a space for up-and-down movement; the breathing valve of the utility model has the advantages that the external expansion structure of the scattered flower opening enables the suction fan to turn upwards after the negative pressure in the breathing valve reaches the rated value, thereby completing suction; when the positive pressure in the breather valve reaches a rated value, the valve cover rises to finish expiration; the structure of valve bonnet card in the snap ring makes the high reduction of breather valve, and the simple structure of disk seat, valve bonnet and locating part is convenient for produce simultaneously.

Description

Breather valve

Technical Field

The utility model belongs to breather valve structure field, concretely relates to breather valve.

Background

The breather valve is a valve which can ensure that the storage tank space is isolated from the atmosphere within a certain pressure range and can be communicated with the atmosphere (breathe) when the pressure exceeds or is lower than the pressure range. The function of the device is to prevent the storage tank from being damaged due to overpressure or vacuum, and simultaneously, the evaporation loss of the stored liquid can be reduced.

The breather valve mainly comprises a valve seat, a valve cover, a protective cover and two groups of opening and closing devices controlled by vacuum and pressure. The opening and closing device comprises a valve clack, a guide rod, a spring seat, a sealing ring and the like. When the pressure in the tank reaches the rated positive exhalation pressure, the pressure valve flap is opened, and steam in the tank is discharged; when the vacuum degree in the tank reaches the rated suction negative pressure, the vacuum valve clack is opened, and air enters.

The adjustment of the rated inhalation negative pressure and the rated exhalation positive pressure of the breather valve requires the valve covers of the positive pressure cylinder body and the negative pressure cylinder body to be respectively disassembled. Periodic inspection of the positive and negative pressure valve discs and their shafts is also not convenient. Because the restriction of the axle of valve disc for the breather valve highly great, influence the whole outward appearance of basin, the structure of valve disc makes the structure of whole breather valve have the inner chamber simultaneously, and is comparatively complicated, is unfavorable for production and processing. The conventional valve disc structure has a high probability of poor sealing performance.

SUMMERY OF THE UTILITY MODEL

The object of the present invention is to overcome the technical problems existing in the prior art, and to provide a breather valve.

In order to achieve the technical purpose, the utility model adopts the following technical scheme:

a breather valve comprises a valve seat, a valve cover and a limiting piece. The valve seat comprises a flange ring, a flower scattering opening, an air suction window and an air suction fan; a scattered flower opening is connected to the upper part of the flange ring, and the scattered flower opening expands outwards while expanding upwards; an air suction window is arranged on the inner wall of the flower scattering opening, the upper part of the air suction window is movably connected with an air suction fan, and the air suction fan covers the air suction window when free; the outward expansion structure of the flower scattering opening enables the air suction fan to hang down due to the action of gravity when the air suction fan is free, and the air suction window is covered. When the negative pressure in the breather valve reaches a rated value, the air suction fan turns upwards, and therefore air suction is completed.

The valve cover is connected with the limiting part and clamped in the flange ring, the limiting part comprises a clamping ring and a fixing column, the outer wall of the fixing column is attached to the inner wall of the flange ring, the valve cover covers the top of the flower scattering opening, and the shape of the contact part of the flower scattering opening and the valve cover is attached to the lower surface of the valve cover; the length of the fixing column ensures that the valve cover and the limiting part have a space for up-and-down movement. When the positive pressure in the breather valve reaches a rated value, the valve cover rises to finish expiration. The structure of valve bonnet card in the snap ring makes the high reduction of breather valve, and the simple structure of disk seat, valve bonnet and locating part is convenient for produce simultaneously.

Optionally, a spring in a compressed state is fixed between the flange ring and the snap ring. The valve bonnet is reset through the springs, and the positive pressure rated value can be adjusted by selecting the springs with different rigidities.

Preferably, the valve seat is a cast iron valve seat, the air suction fan is made of a magnetic material, and the magnetic air suction fan ensures the sealing performance between the air suction fan and the air suction window in a free state.

Optionally, the valve cover is fixed on the fixing column by passing through the valve cover through a screw, and the valve cover is simple and stable.

Optionally, four fixing columns are uniformly distributed on the clamping ring, so that the clamping ring is simple and stable.

Optionally, the upper portion of air suction window passes through hinge structure connection air suction fan, and is simple firm.

Optionally, the valve cover is dome-shaped, so that the rainproof effect is enhanced.

The breathing valve provided by the utility model has the advantages that the outward expansion structure of the scattered flower opening enables the air suction fan to turn upwards after the negative pressure in the breathing valve reaches the rated value, so as to complete air suction; when the positive pressure in the breather valve reaches a rated value, the valve cover rises to finish expiration; the structure of valve bonnet card in the snap ring makes the high reduction of breather valve, and the simple structure of disk seat, valve bonnet and locating part is convenient for produce simultaneously.

Drawings

FIG. 1 is a schematic perspective view of a breather valve according to the present invention;

FIG. 2 is a perspective view of the valve seat of the present invention;

FIG. 3 is a schematic view of the valve seat and the position limiting member of the present invention;

FIG. 4 is a schematic longitudinal cross-sectional view of the breather valve of the present invention;

fig. 5 is a schematic perspective view of the limiting member of the present invention;

reference numerals: the breathing valve (100), a valve seat (1), a flange ring (11), a flower scattering opening (12), an air suction window (13), an air suction fan (14), a valve cover (2), a limiting piece (3), a clamping ring (31), a fixing column (32) and a screw (4).

Detailed Description

The technical solution of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Example 1

As shown in fig. 1 to 5, a breather valve 100 includes a valve seat 1, a valve cover 2, and a stopper 3. The valve seat 1 comprises a flange ring 11, a flower scattering opening 12, an air suction window 13 and an air suction fan 14; a scattered flower opening 12 is connected above the flange ring 11, and the scattered flower opening 12 expands upwards and outwards at the same time; an air suction window 13 is arranged on the inner wall of the flower scattering opening 12, an air suction fan 14 is movably connected to the upper portion of the air suction window 13, and the air suction fan 14 covers the air suction window 13 when free; the flared structure of the diffuser 12 allows the suction fan 14 to hang down due to gravity when free, covering the suction window 13. When the negative pressure in the breather valve 100 reaches a rated value, the inspiratory fan 14 is turned up, thereby completing inspiration. The valve seat 1 is a cast iron valve seat 1, the air suction fan 14 is made of a magnetic material, and the magnetic air suction fan 14 ensures the sealing performance between the air suction fan 14 and the air suction window 13 in a free state. The upper portion of air suction window 13 is connected with air suction fan 14 through a hinge structure, and the air suction fan is simple and stable.

The valve cover 2 is connected with the limiting piece 3 and clamped in the flange ring 11, the limiting piece 3 comprises a clamping ring 31 and a fixing column 32, the outer wall of the fixing column 32 is attached to the inner wall of the flange ring 11, the valve cover 2 covers the top of the flower scattering opening 12, and the contact part of the flower scattering opening 12 and the valve cover 2 is attached to the lower surface of the valve cover 2 in shape; the length of the fixing column 32 ensures that the valve housing 2 and the limiting part 3 have a space for up-and-down movement. When the positive pressure in the breather valve 100 reaches a rated value, the valve housing 2 is raised, and exhalation is completed. The structure that the valve bonnet 2 is clamped in the clamping ring 31 enables the height of the breather valve to be reduced, and meanwhile, the valve seat 1, the valve bonnet 2 and the limiting part 3 are simple in structure and convenient to produce.

In a specific implementation, a spring in a compressed state is fixed between the flange ring 11 and the snap ring 31. The valve housing 2 is reset through the springs, and the positive pressure rated value can be adjusted by selecting the springs with different stiffness.

The valve cover 2 is fixed on the fixing column 32 through the valve cover 2 by a screw 4, and the valve cover is simple and stable.

Four fixing columns 32 are uniformly distributed on the clamping ring 31, and the clamping ring is simple and stable.

In specific implementation, the valve cover 2 is dome-shaped, so that the rainproof effect is enhanced.

The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

The embodiment is only a single implementation manner of the present invention, and for those skilled in the art, other embodiments can be obtained according to the attached drawings without any creative effort, and are also within the protection scope of the present invention.

Claims

1. A breather valve, characterized in that: the breather valve (100) comprises a valve seat (1), a valve cover (2) and a limiting piece (3);

the valve seat (1) comprises a flange ring (11), a flower scattering opening (12), an air suction window (13) and an air suction fan (14); the upper part of the flange ring (11) is connected with a scattered flower opening (12), and the scattered flower opening (12) expands outwards while expanding upwards; an air suction window (13) is arranged on the inner wall of the flower scattering opening (12), the upper part of the air suction window (13) is movably connected with an air suction fan (14), and the air suction fan (14) covers the air suction window (13) when free;

the valve cover (2) is connected with the limiting piece (3) and clamped in the flange ring (11), the limiting piece (3) comprises a clamping ring (31) and a fixing column (32), the outer wall of the fixing column (32) is attached to the inner wall of the flange ring (11), the valve cover (2) covers the top of the flower scattering opening (12), and the contact part of the flower scattering opening (12) and the valve cover (2) is attached to the lower surface of the valve cover (2) in shape; the length of the fixing column (32) ensures that the valve cover (2) and the limiting part (3) have a space for vertical movement.

2. A breathing valve according to claim 1, characterised in that a spring is fixed in compression between the flange ring (11) and the snap ring (31).

3. A breathing valve according to claim 1, wherein the valve seat (1) is a cast iron valve seat (1) and the inspiratory fan (14) is a magnetic material.

4. A breathing valve according to claim 1 or 2 or 3, wherein the valve housing (2) is fixed to the fixation post (32) by means of a screw (4) passing through the valve housing (2).

5. A breathing valve according to claim 1 or 2 or 3, characterised in that four fixing posts (32) are evenly distributed on the snap ring (31).

6. A respiratory valve according to claim 1, 2 or 3, wherein the upper part of the inhalation window (13) is connected to the inhalation fan (14) by means of a hinge structure.

7. A respiratory valve according to claim 1, 2 or 3, wherein the valve housing (2) is dome-shaped.