CN214946628U

CN214946628U - Check valve for rotary fan

Info

Publication number: CN214946628U
Application number: CN202120987310.2U
Authority: CN
Inventors: 李冠军; 翟荣芝; 李岩; 李静
Original assignee: Shandong Sanniu Industrial Products Machinery Co ltd
Current assignee: Shandong Sanniu Industrial Products Machinery Co ltd
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2021-11-30
Anticipated expiration: 2031-05-10

Abstract

The utility model discloses a check valve for a rotary fan, which belongs to the technical field of rotary fan equipment and comprises a valve body, an air inlet pipe and an air outlet pipe, a cavity is arranged in the valve body, the top of the valve body is provided with a top opening, the top opening is covered with a valve cover, a hinged valve rod is arranged in the cavity, the valve rod is fixedly connected with a valve clack, a valve seat is arranged in the valve body and close to the air inlet pipe, a fixed pin is arranged on the air outlet pipe, two symmetrical semicircular butterfly plates are arranged on the fixed pin, the two symmetrical semicircular butterfly plates are respectively and rotatably connected on the fixed pin through a rotating shaft, the air outlet pipe is provided with a circulating air pipe connected with the cavity, the double closing arrangement is adopted, the large air flow channel of the air outlet pipe is preliminarily closed, the small airflow through the circulating air pipe impacts the valve clack to be closed for the second time, so that the gas backflow can be effectively prevented.

Description

Check valve for rotary fan

Technical Field

The utility model belongs to the technical field of the revolving fan equipment, especially, check valve for revolving fan.

Background

The rotary fan operates eccentrically by means of a rotor offset in a cylinder, and causes a change in volume between vanes in a rotor groove to suck, compress, and discharge air. The structure of the device comprises a fan, a motor, an air filter, an air chamber, an oil dripping nozzle, a safety valve, a check valve, an outlet pressure gauge, a base and oil tank, a shock absorber, a transmission device, foundation bolts, connecting bolts among all parts and lubricating oil.

The check valve is arranged between an exhaust pipe and a pipeline of the rotary fan, is opened under the action of fluid pressure, fluid flows from an inlet side to an outlet side, and when the pressure of the inlet side is lower than the outlet side, the valve clack is automatically closed under the combined action of factors such as fluid pressure difference, spring elasticity and the like so as to prevent the fluid from flowing backwards, so that the fan is damaged due to backflow impact on a machine. However, when the existing device is closed, due to the structural design of the check valve, the closing is not timely, so that gas flows back, the backflow is caused, and the backflow impacts a machine to cause damage to a fan.

SUMMERY OF THE UTILITY MODEL

In order to overcome the delayed defect of non return among the prior art, the utility model provides a check valve for rotary fan can the quick closure, prevents that the backward flow from strikeing the fan.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a check valve for rotary fan, includes valve body, intake pipe and outlet duct the inside cavity that is equipped with of valve body, the valve body top is equipped with open-top, and open-top upper cover closes the valve gap the inside articulated valve rod that is equipped with of cavity, valve rod fixed connection valve clack be close to intake pipe department in the valve body and set up the disk seat be equipped with the fixed pin on the outlet duct be equipped with the semi-circular butterfly plate of two symmetries on the fixed pin, two symmetries semi-circular butterfly plate rotates through the pivot respectively and connects on the fixed pin be equipped with the circulation trachea of connecting the cavity on the outlet duct.

Preferably, the air inlet pipe is arranged at the left end of the valve body, and the air outlet pipe is arranged at the right end of the valve body.

Preferably, the air inlet pipe and the air outlet pipe are communicated with the cavity.

Preferably, the valve seat is close to the valve clack, and a sealing buffer ring is arranged on the valve seat.

Preferably, the fixing pin is provided at a cross section of the outlet duct.

Preferably, a baffle is arranged at the upper part of the cavity.

Preferably, one end of the circulating air pipe is arranged above the baffle, and the other end of the circulating air pipe is arranged at the air outlet end of the semicircular butterfly plate.

Compared with the prior art, the utility model discloses the beneficial effect who has: the utility model discloses use dual closing setting, through the atmospheric flow channel who tentatively closes the outlet duct, strike the valve clack through the tracheal little air current of circulation and carry out the secondary and close, can more effectually prevent the gas reflux.

Drawings

The present invention will be further described with reference to the accompanying drawings and the detailed description.

Fig. 1 is a schematic structural view of a check valve for a rotary fan according to the present invention;

FIG. 2 is a schematic view of a partial structure of the semicircular butterfly plate of the present invention;

in the figure: the valve comprises a valve body 1, an air inlet pipe 2, an air outlet pipe 3, a cavity 4, a valve cover 5, a valve rod 6, a valve seat 7, a sealing buffer ring 8, a valve clack 9, a fixing pin 10, a rotating shaft 11, a semicircular butterfly plate 12, a circulating air pipe 13 and a baffle plate 14.

Detailed Description

In order to make the technical solution and the advantageous effects of the present invention more clear, the present invention will be further described in detail with reference to the following embodiments.

The utility model discloses a check valve for rotary fan, refer to fig. 1 and fig. 2, it includes valve body 1, intake pipe 2 and outlet duct 3 1 inside cavity 4 that is equipped with of valve body, 1 top of valve body is equipped with open-top, and open-top upper cover closes valve gap 5 the inside articulated valve rod 6 that is equipped with of

cavity

4, 6 fixed connection valve clacks 9 of valve rod be close to intake pipe 2 department in the valve body 1 and set up disk seat 7 be equipped with fixed pin 10 on the outlet duct 3, fixed pin 10 sets up the cross section at outlet duct 3 be equipped with the semi-circular butterfly plate 12 of two symmetries on the fixed pin 10, two symmetries semi-circular butterfly plate 12 rotates through pivot 11 respectively and connects on fixed pin 10 be equipped with the circulation trachea 13 of connecting cavity 4 on the outlet duct 3.

The intake pipe 2 sets up at 1 left end of valve body, outlet duct 3 sets up at 1 right-hand member of valve body. The air inlet pipe 2 and the air outlet pipe 3 are communicated with the cavity 4.

The utility model discloses in, when the air current entered from intake pipe 2, valve clack 9 was strikeed by the air current and rotates along with valve rod 6, opened intake pipe 2, and fluid gets into cavity 4, in outlet duct 3, under the air current pressure effect, semicircular butterfly plate 12 of two symmetries rotated at fixed pin 10 through pivot 11 to open the axial passageway of outlet duct 3, then export from outlet duct 3 and flow.

A baffle plate 14 is arranged at the upper part of the cavity 4, the baffle plate 14 is used for fixing the valve clack 9, one end of the circulating air pipe 13 is arranged above the baffle plate 14, and the other end of the circulating air pipe is arranged at the air outlet end of the semicircular butterfly plate 12.

When gas reflows, the reflowing gas can enable the two symmetrical semicircular butterfly plates 12 to rotate back to the original point, namely the two symmetrical semicircular butterfly plates 12 close the gas outlet pipe 3 to prevent the fluid from reflowing, the gas outlet pipe 3 is connected with a circulating gas pipe 13 of the cavity 4, so that a small part of gas reflows to the upper part in the cavity 4 through the circulating gas pipe 13 to impact the valve clack 9, and the valve clack 9 falls down and is in contact sealing with the sealing buffer ring 8 on the valve seat 7.

The valve seat 7 is close to the valve clack 9, and a sealing buffer ring 8 is arranged on the valve seat 7. The valve flap 9 is prevented from hitting the valve seat 7, so that the valve seat 7 is easily damaged.

The utility model discloses use dual closing setting, through tentatively closing the big air current passageway, strike valve clack 9 through little air current circulating pipe and carry out the secondary and close, can more effectually prevent the gas reflux.

It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only, not by way of limitation, since other embodiments will become apparent to those skilled in the art upon consideration of the following detailed description of the invention without any creative effort.

Claims

1. The utility model provides a check valve for rotary fan which characterized in that: including valve body (1), intake pipe (2) and outlet duct (3) inside cavity (4) that is equipped with of valve body (1), valve body (1) top is equipped with open-top, and open-top upper cover closes valve gap (5) inside articulated valve rod (6) of being equipped with of cavity (4), valve rod (6) fixed connection valve clack (9) be close to intake pipe (2) department in valve body (1) and set up disk seat (7) be equipped with fixed pin (10) on outlet duct (3) be equipped with semi-circular butterfly plate (12) of two symmetries on fixed pin (10), two symmetries semi-circular butterfly plate (12) rotate through pivot (11) respectively and connect on fixed pin (10) be equipped with circulation trachea (13) of connecting cavity (4) on outlet duct (3).

2. The check valve for a rotary blower according to claim 1, wherein: the air inlet pipe (2) is arranged at the left end of the valve body (1), and the air outlet pipe (3) is arranged at the right end of the valve body (1).

3. The check valve for a rotary blower according to claim 2, wherein: the air inlet pipe (2) and the air outlet pipe (3) are communicated with the cavity (4).

4. The check valve for a rotary blower according to claim 1 or 3, wherein: a baffle (14) is arranged at the upper part of the cavity (4).

5. The check valve for a rotary blower according to claim 4, wherein: one end of the circulating air pipe (13) is arranged above the baffle (14), and the other end of the circulating air pipe is arranged at the air outlet end of the semicircular butterfly plate (12).

6. The check valve for a rotary blower according to claim 1, wherein: the valve seat (7) is close to the valve clack (9), and a sealing buffer ring (8) is arranged on the valve seat (7).

7. The check valve for a rotary blower according to claim 1, wherein: the fixing pin (10) is arranged on the cross section of the air outlet pipe (3).