CN218543291U

CN218543291U - Fan check valve assembly

Info

Publication number: CN218543291U
Application number: CN202223206932.0U
Authority: CN
Inventors: 常美辉; 沈徐辉; 夏凌云
Original assignee: Nantong Huihui Intelligent Technology Co ltd
Current assignee: Nantong Huihui Intelligent Technology Co ltd
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-02-28
Anticipated expiration: 2032-12-01

Abstract

The utility model relates to a check valve technical field, concretely relates to fan check valve subassembly, including the tuber pipe, the department installs the check valve subassembly in the middle of the tuber pipe, installs first valve between tuber pipe air inlet end and the check valve subassembly, installs the second valve between tuber pipe air-out end and the check valve subassembly, and the fan can be connected to the air inlet end, and the aeration pipe can be connected to the air-out end. When the fan is started, the aerator pipe can quickly reach proper aeration air pressure in a very short time when the one-way valve plate is in a closed state to an open state, and the condition that the fan is damaged due to the fact that air flows back into the fan due to the fact that the air pressure is insufficient when the one-way valve plate is slowly opened is avoided; the shutdown process can realize timely closing of the one-way valve plate through the cooperation of the fan, the first valve and the second valve, and linear falling of pressure intensity is realized, so that the fan and the device are protected to be safe to use, and the service life is prolonged.

Description

Fan check valve assembly

Technical Field

The utility model relates to a check valve technical field, concretely relates to fan check valve subassembly.

Background

Check valves of this type function to allow flow of the medium in one direction only, but to prevent flow in the opposite direction. Typically such valves are self-actuating, with the flap opening under the pressure of a fluid flowing in one direction; when the fluid flows in the opposite direction, the valve flap is combined by the fluid pressure and the self-weight of the valve flap to act on the valve seat, thereby cutting off the flow.

The check valves include swing check valves having a hinge mechanism and a flap like a door freely resting on an inclined valve seat surface, and lift check valves.

Aeration is a relatively common technology, this kind of technology is often applied to aquaculture, fields such as sewage treatment, the fan majority that the aeration was equipped with is centrifugal fan, this kind of fan has the characteristics such as carry pressure reinforce, air flow rate is big, the air backward flow of air outlet will be avoided in the centrifugal fan use, there is the backward flow phenomenon in centrifugal fan's air outlet, so in its operating in-process, these backward flow gas can collide with the impeller of high-speed rotation, then will produce great pneumatic noise, this time can be because the wind pressure in the wind channel is greater than fan outlet wind pressure and cause the amount of wind backward flow, when fan outlet wind pressure is greater than wind channel pressure, the fan is supplied air to the wind channel again, so the air current can take place reciprocal flow, fan and pipeline can produce strong vibration, also be centrifugal fan's surge, the noise obviously increases, still can take place the flow, the great fluctuation of total pressure and electric current.

Specific hazards caused by surge of the centrifugal fan are exemplified as follows:

1. the vanes can vibrate strongly, the stress of the impeller is greatly increased, and the noise is intensified.

2. The friction and collision of the moving and static parts are caused, so that the shaft of the fan is bent and deformed, and axial movement is generated when the shaft is serious, and the impeller is damaged.

3. The abrasion of the bearing and the shaft neck is aggravated, the stability of a lubricating oil film is damaged, and the bearing alloy generates fatigue cracks and even burns.

4. The interstage seal and the shaft seal of the centrifugal fan are damaged, so that the efficiency of the fan is reduced, and even accidents such as explosion, fire and the like are caused.

5. The normal operation of other equipment connected with the centrifugal fan is influenced, the normal work of operators is disturbed, and the accuracy of some measuring instruments is reduced, even the instruments are out of order.

Therefore most need be equipped with fan check valve subassembly between fan export and the aeration equipment, the closing speed of the check valve body of current fan check valve when the fan shuts down is not rapid enough, can appear the aeration intraductal water backward flow and produce certain velocity of flow when pressure reduces in the twinkling of an eye, the water of backward flow can reversely push the air in the pipeline to the fan this moment, when this kind of condition appears, the fan can produce too high load because self inertia and the blade that does not in time slow down meets the air of backward flow, can directly scrap the fan when serious, also can't reach appointed pressure when check valve body opens during the start, the air backward flow phenomenon also appears easily, consequently this technical defect waits to solve urgently.

SUMMERY OF THE UTILITY MODEL

For solving the not enough of prior art existence, the utility model provides a fan check valve subassembly.

The technical scheme of the utility model is that:

the utility model provides a fan check valve subassembly, including the tuber pipe, locate the installation check valve subassembly in the middle of the tuber pipe, install first valve between tuber pipe air inlet end and the check valve subassembly, install the second valve between tuber pipe air-out end and the check valve subassembly, the fan can be connected to the air inlet end, and the aeration pipe can be connected to the air-out end.

Furthermore, the check valve plate of the check valve component is connected with the air pipe through a hinge and obliquely arranged, and the check valve plate automatically seals the air pipe under the action of gravity.

Further, check valve subassembly includes that vertical cross-section is the box of rectangle, and the box is separated into inducer and export section with the tuber pipe, and the tip that inducer and export section are close all sets up the check valve plate with the lateral part fixed connection and the intercommunication that the box corresponds, box and inducer junction inboard, and the upside and the box inner wall of check valve plate are articulated to be connected and can follow the box inboard rotation of articulated axial.

Furthermore, the inlet section is connected with a first pressure relief pipe, and a first valve is installed on the first pressure relief pipe.

Furthermore, a second pressure relief pipe is connected to the top of the box body, and a second valve is installed on the second pressure relief pipe.

Furthermore, the outer side surface of the box body connected with the inlet section is a downward inclined surface.

Furthermore, the top opening of box, the detachable installation shrouding of opening part, the through-hole is seted up on shrouding upper portion and at through-hole department installation connecting pipe, and the connecting pipe passes through the second flange joint second pressure release pipe.

Furthermore, a connecting seat is arranged at the bottom of the air pipe.

Furthermore, the first valve is a manual butterfly valve, and the second valve is an electric control valve.

Furthermore, the first valve and the second valve are both electrically controlled valves.

The utility model discloses the beneficial effect who reaches does:

the utility model can realize that the aeration pipe quickly reaches proper aeration air pressure in a very short time when the one-way valve plate is opened from a closed state to an opened state, and avoid the condition that the air possibly flows back into the fan and damages the fan due to insufficient air pressure caused by the slow opening of the one-way valve plate; the shutdown process can realize timely closing of the one-way valve plate through the cooperation of the fan, the first valve and the second valve, linear falling of pressure is realized, stable operation of the fan is guaranteed, the fan and the device are protected to be safe to use, and the service life is prolonged.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic perspective view of the present invention;

fig. 4 is a schematic structural view of the electric control valve for the first valve of the present invention.

Detailed Description

To facilitate understanding of the present invention for those skilled in the art, embodiments of the present invention will be described below with reference to the accompanying drawings.

In the description of the present application, it is to be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

As shown in 1~3, the utility model provides a fan check valve assembly, including tuber pipe 1, first flange 2 is all installed to the air inlet end and the air-out end of tuber pipe 1, tuber pipe 1 is close to the air-out end and is in installation check valve assembly, check valve assembly includes that vertical cross section is the box 4 of rectangle, import section 101 and export section 102 are separated into with tuber pipe 1 to box 4, the tip that import section 101 and export section 102 are close all with the lateral part fixed connection and the intercommunication that box 4 corresponds, box 4 sets up check valve plate 5 with import section 101 junction inboard, the upside and the box 4 inner wall of check valve plate 5 are articulated to be connected and can follow the inboard rotation of articulated axial box, seal box 4 and import section 101 junction when check valve plate 5 pastes tight box 4 inner wall, import section 101, box 4 and export that the fan was connected to the air inlet end of tuber pipe 1 in proper order to establish ties, the figure is not shown.

The rectangular box body 4 is designed, so that the one-way valve plate can be ensured to be opened at a larger angle.

First pressure release pipe 6 is connected to inlet section 101, and first valve 7 is installed to first pressure release pipe 6, and second pressure release pipe 8 is connected at the box top, and second valve 9 is installed to second pressure release pipe 8, and the lateral surface that box 4 links to each other with the inlet section is decurrent inclined plane, and this design can guarantee to install the valve port of box 4 and inlet section 101 junction under the effect of gravity is sealed automatically to the check valve plate 5 in box 4, improves self-sealing's speed and stability.

As shown in fig. 2 and 3, the top of box is the opening design, and shrouding 10 is installed to the opening part, and shrouding 10 is connected through the bolt with the box top, and through-hole and at through-hole department installation connecting pipe 11 are seted up on shrouding upper portion, and connecting pipe 11 passes through second flange 12 and connects second pressure release pipe 8, and this design can conveniently be opened the shrouding and overhaul the box inside.

Connecting seat 13 is installed to the wind channel bottom, and this device can be convenient be connected with equipment such as base or frame through connecting seat 13, makes things convenient for the fixed mounting of the whole position of this device.

When the device is used, the air outlet end of the air pipe 1 is connected with one end of the aerator pipe through the first flange, the aerator pipe is placed underwater when in use, when the fan is not started, the pressure in the outlet section 102 and the box body is greater than the pressure in the inlet section under the action of water pressure, and the one-way valve plate is in a closed state due to pressure difference.

When the fan is started, the rotating speed of the fan does not reach a high rotating speed in the initial stage, the air pressure in the air pipe does not reach the aeration air pressure, the second valve 9 is in a closed state, the first valve 7 is in a state of opening by a certain opening degree, the design can realize that the one-way valve plate is always in a closed state before the fan is increased to a high rotating speed, the first valve 7 is quickly closed along with the increase of the rotating speed of the fan to a certain rotating speed or a peak rotating speed, the air pressure in the inlet section 101 of the air pipe is quickly increased, the quickly increased air pressure can quickly open the one-way valve plate, a large amount of air meeting the index can smoothly and quickly enter the aeration pipe through the outlet section in unit time and then is sprayed out from the air outlet of the aeration pipe, the efficient aeration effect is realized, the process can realize that the aeration pipe quickly reaches the proper aeration air pressure in the extremely short time from the closed state to the open state by the matching of the opening and closing relation of the first valve 7 of the fan, and the condition that the air at the outlet section possibly causes the air backflow into the fan to damage the fan due to the insufficient air pressure in the initial stage is avoided.

This device is because requiring greatly to atmospheric pressure and amount of wind, chooses centrifugal fan for use usually, if the backflow air gets into in the centrifugal fan, and the high-speed rotatory fan blade meets the backflow air at normal work and shutdown speed reduction in-process, and the blade all can bear too high load, all can appear the blade damage and lead to the condition of fan overall damage, consequently no matter all will avoid the air backward flow at the fan normal operating or the initial stage of shutting down.

When the fan is shut down, the interior of the aeration pipe is in a high-air-pressure state before the fan is shut down, the fan is firstly shut down, at the moment, the air pressure in the inlet section cannot be reduced to the normal pressure in a very short time due to the inertia of the fan, so that the pressure in the inlet section can cause the one-way valve plate not to be closed in time, the first valve needs to be opened in time, the air pressure generated in the speed reduction process due to the inertia of the fan can be quickly decompressed through the first valve, the operation can realize that the air pressure in the inlet section can be reduced to the normal pressure in a very short time, so that the one-way valve plate can be quickly closed after the fan is shut down, the condition that the fan is damaged due to the fact that the air flows back into the fan due to the insufficient closing speed of the one-way valve plate easily occurs in the traditional equipment is avoided, the second valve is opened to a certain opening degree after the first valve is opened, after the second valve is opened to a certain opening, the air reflowed in the aeration pipe due to water pressure is discharged from the second valve for pressure relief, so that the phenomenon that the air reflows at the moment when the one-way valve plate is closed is avoided from being discharged everywhere to generate overlarge recoil force on the device, the overlarge recoil force can damage the whole body of the device and the connection part of the pipe body to a certain degree, the service life of the device is easily influenced after multiple use, the second valve is opened to a certain opening, when the air pressure in the outlet section is relieved, the residual pressure can assist the one-way valve plate to be closed with proper force, the situation that the overlarge pressure causes high-speed impact on the valve plate is avoided, the second valve is linearly closed at proper speed after being opened to a certain opening, the pressure in the inlet section linearly falls back, and the one-way valve plate can be closed in time through the matching of the fan, the first valve and the second valve in the shutdown process, and the linear fall-back of the pressure intensity is realized, so that the use safety of the fan and the device is protected, and the service life is prolonged.

The selection of the type of the first valve and the second valve may be chosen according to the specific circumstances.

For example, in the first combination (as shown in fig. 1), the first valve is a manual butterfly valve, and the second valve is an electric control valve.

In the second combination (as shown in fig. 4), the first valve and the second valve are both electric control valves, the electric control valves can be automatically controlled by programs through independent control devices, the opening and closing time and speed can be more accurately controlled, and the automation control of higher degree can be realized. Electric control valve and controlling means in this kind of combination all are equipped with solitary deposit power supply energy supply, in case the power failure suddenly appears, deposit power supply guarantees that controlling means and electric control valve can get into the operation automatically when the fan shuts down suddenly, guarantees opening and shutting in time of first valve and second valve, ensures the safe handling of this device and fan.

The above-mentioned embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A fan check valve assembly characterized in that: the air pipe air-out device comprises an air pipe, wherein a check valve component is arranged in the middle of the air pipe, a first valve is arranged between an air inlet end of the air pipe and the check valve component, a second valve is arranged between an air outlet end of the air pipe and the check valve component, the air inlet end can be connected with a fan, and the air outlet end can be connected with an aeration pipe.

2. A fan check valve assembly as claimed in claim 1, wherein: the check valve plate of the check valve component is connected with the air pipe through a hinge and is inclined, and the air pipe is automatically sealed by the check valve plate under the action of gravity.

3. A fan check valve assembly as claimed in claim 2, wherein: the check valve component comprises a box body with a rectangular vertical cross section, the box body divides the air pipe into an inlet section and an outlet section, the ends close to the inlet section and the outlet section are fixedly connected and communicated with the side parts corresponding to the box body, a check valve plate is arranged on the inner side of the joint of the box body and the inlet section, and the upper side of the check valve plate is hinged with the inner wall of the box body and can rotate along the inner side of the box body along the hinged axis.

4. A fan check valve assembly as claimed in claim 3, wherein: the inlet section is connected with a first pressure relief pipe, and a first valve is installed on the first pressure relief pipe.

5. A fan check valve assembly as claimed in claim 3, wherein: the top of the box body is connected with a second pressure relief pipe, and a second valve is installed on the second pressure relief pipe.

6. A fan check valve assembly as claimed in claim 3, wherein: the outer side surface of the box body connected with the inlet section is a downward inclined surface.

7. A fan check valve assembly as claimed in claim 5, wherein: the top opening of box, the detachable installation shrouding of opening part, through-hole and at through-hole department installation connecting pipe are seted up on shrouding upper portion, and the connecting pipe passes through second flange joint second pressure release pipe.

8. A fan check valve assembly as recited in claim 1, wherein: the bottom of the air pipe is provided with a connecting seat.

9. A fan check valve assembly as recited in claim 1, wherein: the first valve is a manual butterfly valve, and the second valve is an electric control valve.

10. A fan check valve assembly as recited in claim 1, wherein: the first valve and the second valve are both electric control valves.