JPS584503Y2 - Siphon pipe fixing device for container valve for fire extinguishing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for fixing a siphon pipe in a high-pressure container for storing extinguishing agent to a valve socket of a container valve.

In general, high-pressure containers that store extinguishing agents such as carbon dioxide or halogen compounds have a container valve with a siphon tube attached to the valve socket that is screwed onto the mouthpiece of the container, allowing the extinguishing agent to flow out from the bottom of the container. .

Conventional siphon tubes either have a thread cut at the top and are screwed into the valve socket, or a collar is provided at the top end of the siphon tube and are fixed with a holder that screws into the valve socket. Since the siphon tube is cut, a large-walled siphon tube is required, which not only increases the cost but also increases the weight, which has the disadvantage of being easily loosened by vibration.The latter requires a troublesome rounding process to provide a flange at the top of the siphon tube. be.

A siphon tube fixing device for container valves (Utility Model Application No. 54-60724) has been proposed that eliminates these drawbacks.This prior art involves cutting a threaded surface on the inner peripheral wall of the valve socket and screwing the holder of the siphon tube. A notch ring is placed in a slope that tapers upward at the back end of the threaded surface, and this notch ring is tightened between the slope and the top of the holder to bite into the outer circumferential surface of the siphon tube. , succeeded in fixing the siphon tube using simple means such as a tapered slope at the top and a notched ring.

However, since this prior art fixes the siphon tube by biting the notch ring, if a gap remains between the siphon tube and the valve socket and holder, the vibration and shock of the siphon tube will increase when the high-pressure container is transported. There is a risk that the siphon tube will shake significantly and be damaged at the lower end of the holder.

Furthermore, it is extremely costly to process the siphon tube, valve socket, and holder with high precision so that no gaps remain.

In this invention, an annular groove is cut on the inner peripheral surface of the holder to house an O-ring, and the siphon tube is elastically supported by this O-ring.
By absorbing the vibration and shock of the siphon tube through 0'J deformation, we were able to prevent damage to the siphon tube, and by simply adding an inexpensive O-ring, we were able to avoid the high cost of eliminating gaps. .

In the embodiment shown in the drawings, 1 is a valve body of a container valve, with a conduit 3 connected to the outlet on the left side, a safety valve 4 and a gauge valve 5 on the right side, and a valve socket 6 connected to a leg tube (not shown) connected to high pressure. The siphon tube 8 screwed into the cap 7 of a container (not shown) and inserted into the lower end of the valve socket is bent to the bottom of the high-pressure container.

Insert the valve 10 and the valve spring 11 that pushes it up into the valve chamber 2,
Cylinder cover plate connected to the top of the valve box (both not shown)
Tighten with cap nut 12.

Reference numeral 13 denotes a spindle that is screwed into the raised portion 14 of the cover plate.Turn the handle 15 to push down the piston in the cylinder with the tip of the spindle 13, and lower the piston rod (both not shown) to remove the valve 10 from the valve seat. Release the fluid in the high pressure vessel.

Numerals 16 and 17 are joint pipes that are screwed into the protrusion 14 of the cylinder cover plate. The external fluid sent from the joint pipe 16 lowers the piston in the cylinder, and the external fluid flowing out from the joint pipe 17 is directed to the adjacent pipe. Send to high pressure vessel valve.

The configuration of the container valve itself described above is not directly related to the present invention, so a detailed explanation will be omitted.

At the small diameter part of the valve socket 6 that is screwed into the cap 7 of the high-pressure container, most of the inner circumferential wall is widened by the inner thick bone of the siphon tube, a threaded surface 20 is cut in the lower half of the widened part 18, and the siphon tube is attached to the small diameter part of the valve socket 6. The threaded surface of the tubular holder 21 that fits into the valve socket 8 is screwed together, a sloped surface 22 that tapers upward is provided at the far end of the threaded surface 20 of the valve socket, and a ring 23 with a portion 24 cut out is housed in this sloped surface. .

The siphon tube 8 is made of a relatively soft and light material such as aluminum or plastic, and the cutout ring 23 is made of a relatively hard material such as phosphor bronze, stainless steel, piano wire, etc.

Prior art siphon tube fixing device (1987-607)
No. 24) has the above structure, and the top of the siphon tube 8 is fully inserted into the widened part 18 of the valve socket, and a cutout ring 23 is attached to the top end of the holder 21 that fits into the siphon tube.
is mounted, the holder is screwed onto the threaded surface of the valve socket, and the notch ring 23 is brought into contact with the slope 22.

Next, when the holder 21 is turned and moved in, the top end of the holder pushes up the notch ring 23, and the notch ring hits the upper tapered slope 22 and reduces its diameter at the notch 24.
When the notch ring 23 is tightened between this slope 22 and the top end of the holder 21, the notch ring 23 bites into the outer circumferential surface of the siphon tube 8, and the bite of the notch ring 23 prevents the siphon tube 8 from falling off. It is fixed to the socket 6.

In one embodiment of the present invention, an annular groove 25 is cut in the lower end of the inner peripheral surface of the valve socket 6 and an O-ring 26 is housed therein.
6 elastically supports the siphon tube 8.

If the siphon tube and valve socket row expansion part 18 and holder 21 are processed normally, gaps A and B will remain in each of them as shown in FIG.

In this embodiment, even if such gaps A and B remain, when the siphon tube 8 is vibrated or subjected to impact while transporting the container, the O-ring 26 will fit into the deformed annular groove 25 as shown in FIG. Since the siphon tube is in a full state and the vibrations and shocks of the siphon tube are absorbed by the deformation of the O-ring, damage to the siphon tube 8 at the lower end G of the holder is prevented.

The above is an explanation of one embodiment of the present invention, and the present invention is not limited to this embodiment, and the design can be changed within the gist of the invention.

According to the present invention, an annular groove is cut on the inner peripheral surface of the holder and an O-ring is housed therein, and the siphon tube is elastically supported by this O-ring, so a gap remains between the siphon tube, the valve socket, and the holder. It is also possible to prevent damage to the siphon tube due to vibrations and shocks, and by installing a flange on the top end of the siphon tube or using it in conjunction with a device that fixes the siphon tube by biting a notch ring, an inexpensive O-ring can be used. This method has the effect of avoiding the high costs associated with eliminating gaps, and is useful for fixing siphon pipes in container valves for fire extinguishing equipment.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing one embodiment of the present invention, Fig. 2 is an enlarged sectional view of the main part, Fig. 3 is a plan view of the notch ring, and Fig. 4 is a longitudinal sectional view showing an embodiment of the present invention.
The figure is a sectional view showing a deformed state of the O-ring. In addition, 6 is a valve socket, 8 is a siphon tube, 20 is a threaded surface, 21 is a holder, 25 is an annular groove, and 26 is an O-ring.

Claims (1)

[Scope of utility model registration request] A thread is cut on the inner circumferential wall of the valve socket that is screwed into the mouthpiece of the high-pressure vessel, and a holder for the siphon tube is screwed into it.An annular groove is cut on the inner circumferential surface of the holder and an O-ring is housed therein.This O-ring makes the siphon tube elastic. A siphon pipe fixing device for container valves for fire extinguishing equipment.