JPH0340362Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a spray device that sprays a fluid such as water for cooling exhaust gas, and is particularly concerned with loosening of the spray nozzle due to vibration and The present invention relates to a fluid spray device that can prevent a spray nozzle from falling off.

[Prior Art] Spray devices of this type have been used for various devices or purposes, such as cooling or desulfurization of exhaust gas from coal-fired boilers and the like.
The spray nozzle of this spray device is
In addition to metallic ones, ceramic ones are used if they have wear resistance and corrosion resistance. These spray nozzles are attached to the attachment portion on the base pipe side by screwing, flanging, or the like.

[Problems to be solved by the invention] However, in such a spray device, when the spray nozzle is attached using a screw-in method, especially when the spray nozzle is made of ceramics and the attachment part on the base tube side is When the spray nozzle is made of metal or resin, it is difficult to securely screw the spray nozzle into the mounting portion. Further, no appropriate fixing member was provided between these spray nozzles and their mounting portions.

For this reason, the spray nozzle itself vibrates due to the spray force of the spray fluid and vibrations, causing the threaded part of its attachment part to loosen, and in the worst case, to fall off. was. Furthermore, since the spray nozzle and its mounting part are made of metal, and even if they can be firmly screwed together, they do not have a suitable anti-rotation member, so the vibration of the spray nozzle itself may cause the threaded part to become loose. There was a phenomenon where it gradually loosened.

On the other hand, even when the spray nozzle made of the above-mentioned material is attached to the mounting part on the base pipe side using a flange, the bolts and nuts on the flange part may loosen for the same reason, causing the spray nozzle to become loose. There was a phenomenon where the parts vibrated or fell off.

[Means for Solving the Problems] The present invention was made to solve the above problems, and consists of a spray nozzle that spouts fluid and a mounting part on the base pipe side of the spray nozzle. In a fluid spray device which is screwed together, the spray nozzle is made of metal or ceramic, and the base tube side attachment part is metal, the spray nozzle protrudes from the outer surface of the spray nozzle near the threaded part for attachment of the spray nozzle. a protrusion for a detent, and an engagement part for a detent fitting is formed in the protrusion at a position at least opposite to the center of the spray nozzle;
A rod-shaped detent fitting is installed as a bridge between the engaging part of the protruding part and the base pipe side mounting part at a position at least opposite to the center of the spray nozzle and facing in the axial direction of the threaded part. The configuration was as follows.

[Function] With this configuration, even if the spray nozzle and the mounting part on the base pipe side cannot be firmly screwed together to prevent them from loosening, the detent fitting is at least as far from the center of the spray nozzle as possible. By providing two places (two pieces) at opposing positions, even if one of the detents tries to turn due to the rotation of the threaded part, the other detent prevents it, and the two prevent each other. Together, they work together to prevent rotation, preventing the spray nozzle from rotating at its threaded part and firmly fixing both parts, preventing the spray nozzle from loosening at its attachment point or falling off from its attachment point. There's nothing to do.

[Example] Next, an example of the present invention will be described based on the drawings.

1 and 2 show one embodiment of the present invention, in which FIG. 1 is a vertical sectional side view of the spray device, and FIG. 2 is a sectional view taken along the - line in FIG. 1.

In Figures 1 and 2, 1 is a metal or ceramic spray nozzle, 1a is a threaded part, and 1b is a spray nozzle made of metal or ceramics.
is a fluid passage, and 1c is a fluid jet port. Reference numeral 4 designates a mounting side socket 4a which is branched from the base pipe 5 to which fluid is supplied, is attached and fixed, and into which the spray nozzle 1 is screwed and attached, and is a threaded part on the inner surface of the socket 4. In this case, the socket 4 is made of metal. Spray nozzle 1 and mounting socket 4
The threaded portions 1a and 4a are screwed together with a sealing tape or the like for preventing fluid leakage interposed therebetween.

An annular collar 2 as a protrusion is formed on the outer circumferential surface of the spray nozzle 1 at a position close to the threaded portion 1a of the spray nozzle 1, and the outer circumferential edge of the collar 2 has an engaging portion for a detent fitting. Four grooves 2a are formed at equal angular intervals in the circumferential direction. That is, as shown in FIG. 2, two sets (one set) of grooves 2a are provided, one at each position facing the center of the spray nozzle 1. In this groove 2a and on the outer circumferential surface of the mounting socket 4, there is a detent having a rectangular cross-sectional shape and extending along the axial direction of the fluid passage 1b of the spray nozzle 1, that is, the axial direction of the threaded portion 1a. Metal fittings 3
is provided by a bridge. The locking fitting 3 is fixed to the mounting socket 4 by welding on the outer circumferential surface side of the mounting socket 4.
Further, the end of the spray nozzle 1 on the side of the collar 2 is bent toward the center of the spray nozzle 3 at the point where it passes through the groove 2a. In this way, by engaging the detent fitting 3 into the groove 2a of the collar 2 of the spray nozzle 1, even if the threaded portion 1a of the spray nozzle 1 loosens and attempts to turn, the detent fitting 3
Since one end of the groove 2a is fixed to the mounting socket 4, the side wall of the groove 2a is locked by the rotation stopper 3, so that rotation is completely prevented. In this case, the two anti-rotation fittings 3 are attached to the groove 2a at least at opposing positions centering on the spray nozzle 1, so that
Even if one of the detents 3 attempts to rotate as the threaded portion 1a rotates, the other detent 3 attempts to prevent this by interacting with the side wall of the groove 2a, ensuring that the threaded portion 1a does not rotate. prevented,
Loosening of the screw attachment part is completely prevented. With this configuration, even if the spray nozzle 1 is made of ceramics that are highly hard, difficult to machine, and cannot be welded, it can be completely prevented from loosening. In this embodiment, two sets of the grooves 2a are provided, one each at opposing positions with the spray nozzle 1 as the center, and two sets of these are provided, and a rotation stopper 3 is provided in each groove 2a. Although the case where the spray nozzle 1 is attached is shown, the number of these sets can be set appropriately depending on the size of the spray nozzle 1, etc.

Further, instead of the annular collar 2 of the spray nozzle 1, a protrusion may be formed only in the groove 2a. Further, the insertion portion into which the rotation stopper 3 is inserted is not limited to the groove 2a as described above, but may instead be a circular hole, an elongated hole, or the like formed in the protruding portion. good.

[Effect of the invention] As is clear from the above explanation, in the present invention, since the anti-rotation fittings are provided at least at two positions opposite to the center of the spray nozzle, the rotation of the threaded portion is ensured. can be prevented,
The spray nozzle does not loosen or fall off from its attachment part due to vibration, and the device can be operated stably.

Furthermore, the detent fitting can be of a simple structure, and its installation can be done extremely easily by applying it to the engaging part of the external protrusion.
This has the practical effect of easily preventing the spray nozzle from falling off with a simple component configuration.

In this invention, especially when the spray nozzle is made of ceramic, it is difficult to form rotation prevention parts such as protrusion insertion parts by machining due to the high hardness of ceramic, but when molding the spray nozzle, Rotation can be prevented simply by forming such a rotation prevention portion, which is useful.

[Brief explanation of the drawing]

FIG. 1 shows one of the fluid spray devices according to the present invention.
A vertical sectional side view showing the embodiment, FIG. 2 is from FIG.
It is a line sectional view. 1... Spray nozzle, 2... Tsuba, 2a...
Groove, 3... Anti-rotation fitting, 4, 6... Mounting side socket, 5... Base pipe.

Claims (1)

[Scope of utility model registration request] A spray nozzle for ejecting fluid and a base tube side attachment part of the spray nozzle are screwed together, and the spray nozzle is made of metal or ceramic and the base tube side attachment part is metal. In the spray device, a protrusion protruding from the outer surface of the spray nozzle is provided in the vicinity of the threaded part for attaching the spray nozzle, and this protrusion has an engaging part for a detent fitting at a position at least opposite to the center of the spray nozzle. A rod-shaped detent fitting is formed between the engaging part of the protruding part and the base pipe side attachment part at a position at least opposite to the center of the spray nozzle and facing in the axial direction of the threaded part. A fluid spray device characterized in that it is installed by bridging the.