JP3686010B2 - Piping block device with water spray nozzle for snow-melting - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a piping block device with a water spray nozzle for snow extinguishing embedded in a road surface such as a road or a parking lot, and more specifically, mainly improves the connecting means of the riser pipe to the main pipe and the connecting means of the water spray nozzle to the rise pipe. The present invention relates to a piping block device with a water spray nozzle for snow removal.
[0002]
[Prior art]
Conventionally, steel pipes have been used in the construction of piping block devices with water spray nozzles for snow-melting, but those using these steel pipes are clogged in a short period of time due to corrosion due to salt damage, and do not perform well. It was easy to occur.
[0003]
Against this background, in recent years, vinyl chloride pipes (hereinafter referred to as polyvinyl chloride pipes) have been used as an alternative to steel pipes.
[0004]
And the piping block apparatus with the water spray nozzle for snow-melting also used the PVC pipe for the start-up pipe, was connected to the hole drilled in the main pipe by welding, and had a structure where stress was easily concentrated on the welded portion. For this reason, when a repeated load such as a vehicle load is applied, the welded part of the riser pipe and the main pipe is subject to fatigue deterioration, and the linear expansion coefficient of the PVC pipe is about 7 times that of concrete. Undesirable restraining force acts on the PVC pipe due to temperature changes caused by steam curing or heat of hydration.
[0005]
Therefore, the present inventor has examined various types of improved proposal types from the viewpoint of temperature change and fatigue for the purpose of improving the riser structure, and as a result, the strain due to temperature change is more fundamental than the applied load. Confirmed that there is a large stress in the part, that the stress acting on the riser pipe is relatively greater than the stress acting on the main pipe, and that the influence of temperature changes during concrete placement during curing is large, etc. The present inventors have found the structure type of the present invention from the above improvement proposals.
[0006]
[Problems to be solved by the invention]
The present invention achieves a good result by remarkably achieving absorption of stress due to the load applied to the base of the riser and changes in temperature, absorption of stress acting on the riser, and influence of temperature changes during concrete placement during curing. An object of the present invention is to provide a piping block device with a water spray nozzle for snow removal having a novel structure that is easily devised.
[0007]
[Means for Solving the Problems]
In order to achieve the above-mentioned purpose, a synthetic resin rising pipe is erected at an appropriate position of the synthetic resin main pipe, and a water spray nozzle is connected to the upper end of the rising pipe and embedded in concrete. In connection with a piping block device with a water spray nozzle for snow, a female screw communicating inside and outside is drilled in a wall of a synthetic resin rising pipe in a synthetic resin main pipe, and this female screw is screwed to the female screw. A short tubular socket provided with a tubular male screw at the lower end is screwed in a state communicating with the inside and outside of the main pipe , an annular groove is provided on the inner peripheral surface of the upper end tubular portion of the socket, and an O-ring is fitted thereto. The lower end of the synthetic resin riser pipe is connected to the upper end tubular portion by a push-in operation.
[0009]
In the piping block device with a water spray nozzle for snow extinguishing, the main pipe, the riser pipe, and the socket are made of synthetic resin made of polyvinyl chloride or the like .
[0011]
【Example】
In the embodiment shown in the figure, a PVC pipe rising pipe 3 is erected at a suitable location of a PVC pipe main pipe 1 via a PVC socket 2, and a water spray nozzle 4 is attached to the upper end of the rising pipe 3. This is a piping block device with a long-structured snow-spraying watering nozzle in which these are embedded in concrete 5.
[0012]
The PVC pipe binding pipe 1 has a receiving port 6 having a large pipe diameter formed integrally at both ends thereof, and an annular groove is provided on the inner peripheral surface of each receiving port 6 to seal the annular groove. A packing (not shown) is attached, and a female screw 7 opening upward is provided at an appropriate position.
[0013]
The socket 2 has a large short tube portion on the upper half and a short short tube on the lower half, and a step portion 10 is formed at a continuous portion of the large short tube portion 8 and the small short tube portion 9 and is large. The upper and lower annular grooves 11 are provided on the inner peripheral surface of the short diameter pipe portion 8, and an O-ring 12 made of styrene butadiene rubber is fitted into each of the annular grooves 11, and the outer peripheral surface of the small diameter short pipe portion 9. A male screw 13 to be screwed onto the female screw 7 is engraved, and a spanner notch (not shown) is provided on the outer periphery of the upper portion of the large-diameter short tube portion 8.
[0014]
The rising pipe 3 is an impact-resistant PVC pipe (hyper PVC pipe) containing a rubber-based material, and the outer circumferences of the upper and lower end portions are tapered 14 and 15.
[0015]
The watering nozzle 4 has a watering port (not shown) on the top surface and a connecting port 17 that opens downward at the lower end. Although not described in detail here, the start / stop of watering and the amount of watering The connecting port 17 is provided with a bumping step 18 at its inner end and two upper and lower annular grooves 19 on its inner peripheral surface. In each annular groove 19, an O-ring 20 made of styrene butadiene rubber is fitted.
[0016]
That is, in the above-described embodiment, for example, the male screw 13 of the socket 2 is screwed to the female screw 7 provided in the main pipe 1, and after this screwing, the rising pipe 3 is connected to the large-diameter short pipe portion 8 of the socket 2. The lower end is connected by pushing operation, and the connecting port 17 of the watering nozzle 4 is connected to the upper end of the rising pipe 3 by pushing operation, so that these are embedded in the concrete 5 with the watering nozzle 4 attached to the main pipe 1. It is a thing.
[0017]
The outer diameter of the riser pipe 3 is made slightly thinner than the inner diameter of the large diameter short pipe portion 8 of the socket 2 and the connection port 17 of the watering nozzle 4 so that the riser pipe 3 can be moved slightly. It is made easy to do. In the figure, reference numeral 21 denotes a packing. In the present invention, the socket 2 is directly welded to the main pipe 1 without the packing, and the screwed portion of the female screw 7 and the male screw 13 is bonded and fixed by pouring an adhesive. Thus, the socket can be attached by sealing, etc., and a normal PVC pipe can be used in place of the impact-resistant PVC pipe (hyper PVC pipe).
[0018]
[Action]
Since the present invention is configured as described above, the adhesive force between the PVC pipe riser and the concrete is significantly greater than that of the steel pipe and concrete, and the concrete and the PVC pipe riser is made of an elastic O-ring. It is allowed to behave in an almost integrated state, and stress and vibration due to load, temperature change, and vibration are suppressed and absorbed at the O-ring.
[0019]
【The invention's effect】
As described above, the piping block device with a water spray nozzle for snow extinguishing according to the present invention is subjected to stress and vibration within the allowable range (within the limit) from the outside with respect to the riser pipe made of PVC pipe, and this is applied to the O-ring and short tubular socket. It is absorbed by the threaded part of the main pipe and is difficult to be transmitted to the PVC pipe main pipe and watering nozzle, and the load and temperature on the root part of the riser pipe (that is, the base part of the socket) in the PVC pipe main pipe It has a function to absorb stress due to changes, a function to absorb stress acting on the riser pipe, and a function to absorb the effect of temperature changes during concrete setting during curing. This is effective in completely achieving the intended purpose of providing a piping block device with a watering nozzle, and it is relatively easy to replace a riser pipe made of, for example, a PVC pipe. There is an advantage that it can be performed easily and easily, and a slight misalignment can be absorbed.
[Brief description of the drawings]
FIG. 1 is an enlarged cross-sectional view of a main part showing one embodiment of the present invention.
FIG. 2 is an overall schematic front view of the same.
[Explanation of symbols]
1 PVC pipe main pipe 2 PVC socket 3 PVC pipe rising pipe 4 Water spray nozzle 5 Concrete 6 Receptacle 7 Female screw 8 Large diameter short pipe section 9 Diameter small short pipe section 10 Step section 11 Annular groove 12 O-ring 13 Male Screws 14 and 15 Taper 17 Connection port 18 Step portion 19 Annular groove 20 O-ring 21 Packing

Claims (1)

  A piping block device with a water spray nozzle for snow extinguishing constructed by placing a synthetic resin riser pipe at an appropriate location of a synthetic resin main pipe and embedding it in concrete with a water spray nozzle connected to the upper end of the riser pipe A short pipe is provided with a female screw communicating with the inside and outside of the wall of the synthetic resin rising pipe in the synthetic resin main pipe, and a tubular male screw that is screwed into the female screw at the lower end. A tubular socket is screwed in a state where it communicates with the inside and outside of the main pipe, an annular groove is provided on the inner peripheral surface of the upper end tubular portion of this socket, and an O-ring is fitted thereto, and a synthetic resin stand is formed in the upper end tubular portion. A piping block device with a water spray nozzle for snow-melting, wherein the lower ends of the raising pipes are connected by pushing-in operation.

Images