JPS61149672A - Gate damper device - Google Patents

Abstract

PURPOSE:To reduce the installation space by shifting a structure surface of an open-and-close mechanism from an open-and-close surface of a gate. CONSTITUTION:A gate 9 disposed in a passage 8 is opened and closed by a pair of gate opening and closing cylinders 10 disposed with a difference in level with the opening and closing surface of the gate 9. A packing 13 is pressed to a seat 14 by a gate loosening cylinder 11 and an eccentric cam 12 so that the gate 19 is adapted to completely intercept the passage 8. The gate opening and closing cylinder 10 are operated in the opening direction, whereby the gate 9 is moved to a full-open position in a chamber 18 by linking action of an open-and-close arm 16, an open-and-close shaft 17 and a connecting arm 22.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a gate damper device installed at a location in a duct system of a plant where it is necessary to completely block the flow of air or gas.

Conventional technology Generally, in boiler plants, chemical plants, etc.
Depending on the purpose, ventilation devices are installed to open, control, mix, shut off, or bypass air or gas flow paths.

In addition, as the equipment in these plants becomes larger and more complex, important auxiliary equipment is equipped with spares so that the entire plant can be operated continuously for long periods of time to increase efficiency.
Efforts have been made to allow equipment that requires maintenance to be removed from the process and inspected even while the plant is in operation.

As an example of such a device, FIG. 3 shows a system of a mill inlet air duct for a coal-fired boiler.

In the figure, reference number 1 is hot air, 2 is cold air, 3 is mil, 4
5 indicates a hot air mill inlet control damper, 5 indicates a cold air mill inlet control damper, 6 indicates a hot air mill inlet gate damper, and 7 indicates a cold air mill inlet gate damper.

4 and 5 are diagrams showing an outline of the structure of the gate damper 6.7 shown in FIG. It is opened and closed by a gate opening/closing cylinder 10. Further, the gate 9 is configured to completely block the flow path 8 when the gasket 13 is pressed against the seat 14 by the gate tightening/loosening cylinder 11 and the eccentric cam 12.

Next, its effect will be explained.

When opening the flow path 8, first, the drive lever l5 is actuated by the gate tightening/loosening cylinder 11, and the drive lever l5 is moved to the loosening position 15a.
Make it. Then, by the gate opening/closing cylinder IO,
Gate 9 via opening/closing arm 16 and opening/closing shaft 17
is moved to an open position within chamber 18.

At this time, the gate 9 is
19 and a roller receiver attached to the damper frame are supported by a plate 20.

Next, when the flow path 8 is to be shut off, the gate 9 is first moved to the closed position within the flow path 8 using the gate opening/opening cylinder 10 via the opening/closing arm 16 and the opening/closing shirt 17. Then, the drive lever 15 is operated to the tightening position 15b by the gate tightening/loosening cylinder 11 to rotate the eccentric cam 12, which presses the gasket 13 against the seat 14 and blocks the flow path 8.

Problems to be Solved by the Invention In the conventional gate damper device, a large space is required for opening and closing the gate 9. That is, in FIG. 4, the duct cross section (AX
Approximately 3.5 times (3 out of A (A + B + A))
．． 5A2) space is required.

However, it is difficult to secure such a large space on the operation floor where equipment piping and the like are congested.

Therefore, the present invention attempts to save space in the gate damper device by devising the opening/closing mechanism of the gate damper device.

Means for Solving the Problems The present invention reduces the space required for installing the gate damper device by making the configuration surface of the opening/closing mechanism different from the opening/closing surface of the gate. be.

More specifically, the gate damper device according to the present invention saves space by providing a gate opening/closing cylinder, an opening/closing arm, and an opening/closing shaft at a level different from the opening/closing surface of the gate. This is what I did.

EXAMPLE A preferred embodiment of the present invention will be described in detail below with reference to FIGS. 1 and 2. In these figures, the same parts as in FIGS. 3 and 4 are given the same reference numerals, and detailed explanation thereof will be omitted.

FIGS. 1 and 2 show the gate damper device according to this embodiment, in which the gate 9 installed in the flow path 8 is located at a different level from the opening/closing surface of the gate 9. It is opened and closed by a pair of gate opening/closing cylinders 10. The gate 9 also has a gate tightening/loosening cylinder 11.
The gasket 13 is pressed against the seat 14 by the eccentric cam 12, thereby completely blocking the flow path 8.

Next, its effect will be explained.

When the flow path 8 is to be fully opened, the gate tightening/loosening cylinder 11 is first operated in the loose direction, and the drive lever 15, camshaft 21. The gate 9 is placed on the roller support plate 20 via the eccentric cam 12. And the gate opening/closing cylinder 10
By operating in the opening direction, the gate 9 is opened by the cooperation of the opening/closing arm 16, opening/closing shaft 17, and connecting arm 22.
The roller receiver attached to the damper frame is supported by a plate 20.

To fully close the flow path, the gate opening/closing cylinder 10 is operated in the closing direction, and the opening/closing arm 16 and opening/closing shaft 17 are
, move the gate 9 into the channel 8 via the connecting arm 22. Then, the driving lever 1 is driven by the tightening/loosening cylinder 11.
5 to the tightening position to rotate the camshaft 21 and the eccentric cam 12, and press the gasket 13 against the seat 14 to completely block the flow path 8.

As described above, in order to install a gate damper device according to this embodiment that is automatically operated, has a short operating time, and is reliable in operation, an installation space that is 3.5 times the cross section of the duct is required. By breaking the conventional common sense that there is a gate damper device and providing the gate opening/closing cylinder 10, opening/closing arm 16, and opening/closing shaft 17 at a level different from the opening/closing surface of the gate 9, the gate damper device 1 has the same function as the subordinate* gate damper device. However, the space required for installation can be reduced.

To explain this point in more detail, the installation space required by the gate damper device according to this embodiment is represented by AX (A+B'+A+B') as shown in FIG.

Here, Bl + BI)lA, so gH of the duct cross section
This means you will need twice as much space. This shows that the required installation space can be significantly reduced compared to 3.5 times the conventional one.

Furthermore, in the conventional gate damper device, the gate 9 overhangs due to the weight of the opening/closing arm 16, etc., so a means to support the weight of the opening/closing arm 16 is required. 22 is connected to the gate 9 and the opening/closing shaft 17 near the end opposite to the opening/closing arm 16, as shown in FIG. No need to worry about overhanging.

Effects of the Invention As detailed above, according to the present invention, the gate damper device can be arranged compactly, so interference with other equipment can be prevented, and the operating floor surface can be used effectively. be able to.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an example of a gate damper device according to the present invention, Fig. 2 is a view from the ■-■ arrow in Fig. 1, Fig. 3 is a system diagram of the inlet air duct of a coal-fired boiler mill, and Fig. 4 is a plan view showing an example of a gate damper device according to the present invention. FIG. 5 is a plan view showing a conventional gate damper device, and a view taken along the line V-V in FIG. 4 in FIG. 8. Flow path, 9. Fist/gate, 10. φ gate opening/closing cylinder, 11.. ° cylinder for gate tightening/loosening, 12 φ. eccentric cam, 13.. packing, 14.. seat, 15.. drive lever. 16...Opening/closing arm, 17@-Opening/closing shift, 18...Chamber, 19...Roller, 20--Roller holder is plate, 21-Fist/camshaft, 22...Connecting arm. Figure 1 Figure 3

Claims (1)

[Claims] A gate damper device that includes a gate opening/closing cylinder, an opening/closing arm, and an opening/closing shaft at a level different from the opening/closing surface of the gate.