JPS643933Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a wick up/down device for a combustor.

Generally, in a combustor using a wick, the wick is energized in a downward direction for fail-safe purposes.
For example, as shown in Fig. 4, the lamp wick B is raised by the wick vertical axis A, and a spring E is provided between the wick holder C and the wick outer cylinder D to bias the lamp wick B in the downward direction. It's becoming like that. For this reason, the wick raising operation force for adjusting the firepower after raising the wick B becomes uneven. That is, when the lamp wick B is lowered, the elastic force of the spring E can be used to easily lower the lamp wick B, but when the lamp wick B is raised, the spring E
There were problems such as the elastic force added as resistance and requiring a very large operating force. According to experiments, the operating force when the lead was lowered was 2 kgfcm, but the operating force when the lead was raised was 6 kgfcm.

This idea was created in view of these points.
The purpose of this lamp is to reduce the operating force when raising the lamp wick, and to make it easy to use by substantially balancing the operating force when raising and lowering the lamp wick. In order to achieve the above object, the present invention provides a balance spring that offsets the downward force of the spring when the lamp wick rises, thereby achieving the desired object.

Hereinafter, one embodiment will be described with reference to the drawings. Reference numeral 1 denotes an oil tank, on which a combustion tube 2 is placed. Reference numeral 3 denotes a gear that locks the rotational return of the core vertical shaft 4, and is configured to be locked by a lever 6 of the vibration fire extinguishing device 5. Reference numeral 7 indicates a weight of the vibrating fire extinguishing device 5, which tilts when a vibration shock is large, and operates a lever 6 to return the wick vertical shaft 4 to rotation, thereby lowering the wick.

A lamp wick 9 is arranged vertically in the upper gap between the tank 1 and the wick outer cylinder 8, and its wick holder 10 is engaged with a shaft gear 11 of a wick vertical shaft 4. Reference numeral 12 denotes a lead lowering spring that always urges the lead holder 10 downward.

The core vertical shaft 4 is rotated through the knob 13, but since the gear 3 is loosely fitted to the core vertical shaft 4, the friction plate 14 fixed to the core vertical shaft 4 and the friction plate 1
5 and held so that it can rotate freely with a constant frictional force due to the pressure of a balance spring 16.

Friction plates 14, 1 that operate in conjunction with the above-mentioned core vertical shaft 4
5, friction plate 1 on the balance spring 16 side
5 has a protrusion 15a formed thereon. Further, the gear 3 is also formed with projections 3a, which are engaged with each end of the balance spring 16. That is, the balance spring 16 serves as both a compression spring and a torsion spring, and the friction plate 14
is energized as shown by arrow C.

Note that 17 is a retainer for the balance spring 16. 15b and 15b' are protrusions provided on the friction plate 15 at regular intervals, and the protrusion 3a of the gear 3 is located between these protrusions 15b and 15b'. Gear 3 only between 15b'
and the friction plate, that is, the core vertical shaft 4, become free to move (become free) when a rotational torque of a certain value or more is applied. This regulates the upper and lower range of the lamp wick during combustion, which allows for good combustion with less CO emissions.

In the above configuration, the operating force of the core vertical shaft 4, which is a feature of this embodiment, will be explained while organizing the relationship between the directions in which the core vertical shaft 4 is biased by each spring. First, the lead holder 10 is urged in the direction of arrow A by the lead lowering spring 12. Therefore, the core vertical shaft 4 is energized as indicated by arrow B. On the other hand, the balance spring 16 applies a biasing force as indicated by the arrow C to the core vertical shaft 4 via the friction plate 15, thereby canceling out the biasing force as indicated by the arrow B. Therefore, if the applying force of arrow C is set to be slightly smaller than or equal to the applying force of arrow B, the operating force for rotating the lead vertical shaft 4 will be approximately the same for both raising and lowering the lead.

As is clear from the above description of the embodiments, the wick up/down device of the present invention has a balance spring on the wick up/down axis that cancels out the force of the fail-safe spring, so the lifting operation for adjusting the firepower of the wick is easy. Just like descending, it can be done easily and the usability is significantly improved.

[Brief explanation of drawings]

Fig. 1 is a schematic configuration diagram of a combustor employing a wick up/down device according to an embodiment of the present invention, Fig. 2 is a sectional view showing the wick up/down device, and Fig. 3 is an exploded perspective view of the main parts. FIG. 4 is a sectional view showing a conventional example. 3... Gear, 3a... Protrusion, 4... Core vertical axis,
5... Electric fire extinguishing system, 6... Lever, 9... Light wick,
12...Spring for center lowering, 14, 15...Friction plate, 15b, 15b'...Protrusion piece, 16...Balance spring.

Claims (1)

[Scope of utility model registration request] A lamp wick, a wick vertical shaft that moves the lamp wick up and down,
A wick lowering spring biases the lamp wick raised by the wick up-down axis to return it to a lower position, and a wick lowering spring which locks the lamp wick raised by the wick up-down axis at that position and moves the lamp wick to the lower position. A shaft locking means that allows the core to be lowered; and a balance spring that biases the core vertical shaft, which is biased in the downward direction by the core lowering spring, in a direction opposite to the biasing direction of the core lowering spring. The shaft locking means includes a shaft locking gear that is loosely fitted to the operating shaft, and a friction plate that is configured to interlock the gear within a constant friction torque range by frictional force and that is locked to the operating shaft. The balance spring, which is biased in the opposite direction to the bias of the center lowering spring, also serves as a pressure contact spring that interlocks the two, and has protrusions provided at regular intervals on one of the friction plates or gears. A wick up/down device for a combustor in which a friction plate and a shaft locking gear are provided with a protrusion and a protrusion located between the protrusion pieces to allow free movement only within a certain range.