JPS5815744Y2 - FF combustor air supply pipe installation device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a damper mounting structure for connecting an air supply pipe that supplies combustion air to an air blower to an FF combustor and for determining the amount of air.

The air supply pipe of an FF combustor is made of a flexible tube, and the connection must be such that it cannot be easily disconnected even if the air supply pipe is pulled.

Furthermore, if it is necessary to change the amount of combustion air due to differences in gas type, power supply frequency, etc., it is necessary to be able to easily replace the damper.

A conventional configuration of this type will be explained with reference to FIG.

1 is a casing that houses a fan 2 and a motor 3;
The downstream side is connected to a combustor, and the upstream side has a connecting pipe 4 protruding therefrom.

Reference numeral 5 denotes a flexible air supply pipe made of soft PVC or the like, which is inserted into the connecting pipe 4 and fastened with a fixing band 6 to fix both.

7 is a damper, and after attaching it to the flexible ring-shaped fixture 8,
It is inserted into the connecting pipe 4.

Furthermore, when replacing the damper 7, the fixing band 6 is removed, the air supply pipe 5 is pulled out, and the fixing fitting 8 is removed from the connecting pipe 4.

This configuration requires many parts, making the structure complex and expensive.

The present invention has been made to improve these drawbacks.

The present invention will be explained below with reference to an embodiment shown in the drawings.

Reference numeral 9 denotes an air supply pipe made of soft vinyl chloride, and a fixing groove 10 provided on the outer periphery of the tip thereof is inserted into a connection port 11 of the casing 1 for connection.

In order to facilitate insertion into the connection port 11, the outer diameter is reduced at all but two locations, as shown in FIG.

A damper fixing groove 12 is composed of a stepped portion 12a and two protrusions 12b.

In such a configuration, the damper fixing bridge 11 and the air supply pipe fixing groove 1
By increasing the distance from 0.0 to 0.5 to 2 times the inner diameter of the air supply pipe 9, the air supply pipe 9 will not only respond when a tensile force FA is applied, but also when a bending force Fb is applied from the side. Even in this case, since the damper 7 is inserted and fixed inside, the air supply pipe 9 will not be deformed and will not come off from the connection port 11.

On the other hand, when removing the air supply pipe 9, the air supply pipe 9 can be easily removed by strongly pressing the space between the damper fixing groove 12 and the air supply pipe fixing groove 10 with a finger or the like to deform it.

Further, the damper 7 can be removed by kneading it with a screwdriver or the like from the tip side of the air supply pipe 9.

-To explain an example, inner diameter: 30mm, outer diameter: 40mm
The damper fixing groove 11 was made of soft PVC with a distance of 25 degrees from the tip and was in good condition.

For example, after the air supply pipe 9 is fixed by inserting the air supply pipe fixing groove 10 into the connection port 11 of the blower without installing the damper 7 in the damper fixing groove 12, an external force FA or Fb is applied to the air supply pipe 9 on the upstream side of the damper mounting part. Since there is no support inside the air supply pipe 9, the tip of the air supply pipe 9, that is, the area around the air supply pipe fixing groove 10, easily deforms, becomes flat, and separates from the connection port 11.

However, in the embodiment, the damper 7 is located near the air supply pipe fixing groove 10.
This serves as a support, prevents deformation due to external forces, and cannot be detached.

On the other hand, if the air supply pipe 9 is strongly pressed between the damper fixing groove 12 and the air supply pipe fixing groove 10, the damper 7 does not act as a support, so the air supply pipe fixing groove 10 is deformed and cannot be separated from the connection port 11. It is possible.

Since the attachment of the damper 7 is used in this way to prevent separation due to external force, the structure can be simple.

As described above, the present invention forms the air supply pipe with a flexible member,
A concave groove is provided on the outer periphery of the end of the air supply pipe, and a damper for controlling the amount of combustion air is inserted and fixed on the inner surface of the groove at a position between 05 and 2 times the inner diameter of the air supply pipe in the upstream direction. After inserting the damper into the groove, the groove on the outer periphery is inserted into the connection port of the air blower, so the damper can be fixed and the air supply pipe can be connected and removed with a simple configuration. It is something.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a conventional air supply pipe attachment device, Fig. 2 is a sectional view of an air supply pipe attachment device according to an embodiment of the present invention, and Fig. 3 is a sectional view of a conventional air supply pipe attachment device.
FIG. 3 is a right side view of the figure. 7... Damper, 9... Air supply pipe, 10, 12... Groove.

Claims (1)

[Scope of utility model registration request] The air supply pipe is formed of a flexible member, a concave groove is provided on the outer periphery of the end of the air supply pipe, and an inner surface is formed at a position from 0.5 times to twice the inner diameter of the air supply pipe in the upstream direction of the groove. An FF type combustor, characterized in that a groove is provided in the groove for inserting and fixing a damper for controlling the amount of combustion air, and after the damper is inserted into the groove, the groove on the outer periphery is inserted into a connection port of a blower device. Air supply pipe installation device.