JPH0647938Y2 - Sprinkler valve - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sprinkler valve which is provided in a tank truck such as a sprinkler and is suitable for sprinkling water in a sprinkler tank.

[0002]

2 and 3 show a sprinkler valve of the prior art.

In the figure, reference numeral 1 denotes a water sprinkling tank mounted on a tank truck 100 as a water sprinkling vehicle.
In order to lower the center of gravity, is formed as a cylindrical body having an elliptical cross section, and the sprinkling tank 1 contains a liquid such as water W for sprinkling water.

A drain port 1B is formed in the bottom portion 1A of the water sprinkling tank 1, and the drain port 1B is located on both sides of the rearmost portion of the vehicle via a drain pipe 2 extending toward the rear side of the vehicle. 2 sprinkler valves 3 and 3 (only 1 shown)
Is installed.

Each sprinkling valve 3 is composed of a valve body 4 and a valve shaft 5 and a valve body 7 which will be described later. The valve body 4 has a spherical portion 4A defining a valve chamber A inside. , The spherical portion 4
A cylindrical connection port 4B projecting from one side of A and having a flange 4B1 on the peripheral portion, and a cylindrical sprinkling port 4C projecting from the lower side of the spherical portion 4A are integrally formed. Further, a small-diameter cylindrical boss portion 4D projecting inward and outward of the valve chamber A is integrally formed on the upper side of the spherical portion 4A so as to communicate with the valve chamber A so as to face the water spray port 4C. An annular valve seat 4 that projects toward the inside of the valve chamber A with a predetermined height between the sprinkling port 4C
E is integrally formed. Here, the valve seat 4E is the valve chamber A
Located between the connection port 4B and the sprinkling port 4C within the valve seat 4
A valve element 7 to be described later is seated on the seat E.

Reference numeral 5 denotes a valve shaft which is slidably inserted into the boss portion 4D of the spherical portion 4A and protrudes in and out of the valve chamber A. The valve shaft 5 has a portion from the boss portion 4D to the spherical portion 4A. A wire insertion hole 5A is formed on the upper end side protruding outward. A screw hole 5B is formed in the lower end side of the valve shaft 5 in the radial direction, and a disc-shaped valve body 7 is formed in the screw hole 5B through two bolts 6 and 6.
Is installed. Here, the valve body 7 has a cylindrical mounting portion 7A having screw holes 7A1 formed in the radial direction, and the mounting portion 7A.
And a disc-shaped valve plate 7B integrally formed on the lower end side of the valve body 7. The valve body 7 is fixed to the tip of the valve shaft 5 by screwing bolts 6 into the screw hole 7A1 of the mounting portion 7A from both sides. It is like this.

Reference numeral 8 denotes a valve spring arranged on the outer peripheral side of the valve shaft 5, the valve spring 8 being provided between the boss portion 4D of the spherical portion 4A and the mounting portion 7A of the valve body 7, The body 7 is always biased in the valve closing direction.

Reference numeral 9 denotes a sprinkler plate attached to the lower side of the sprinkler port 4C. The sprinkler plate 9 has a mounting cylinder 10 having a threaded portion 10A formed on the outer peripheral surface thereof, and an integral structure at the lower end side of the mounting cylinder 10. The water sprinkling section 11 has a concave curved surface. Here, the water sprinkling portion 11 includes a round bottom portion 11A and a dish portion 11B extending from the round bottom portion 11A toward the other side in a fan shape. The water sprinkling portion 11 has a mounting cylinder for sprinkling water from the dish portion 11B to the outside. An arc-shaped opening 11C is formed between the opening 10 and the opening 10. The water sprinkler 9 is attached to the inner peripheral side of the water spout 4C such that the threaded portion 10A of the mounting cylinder 10 is screwed into the water spout 4C.

Reference numeral 12 denotes a water spray plate attached to the lower end of the water spray port 4C of the valve body 4 so as to face the water spray tray 9 above and below, and the water spray plate 12 is formed of a substantially fan-shaped metal plate, A fitting hole 12A is provided on the inner peripheral side thereof. The sprinkler plate 12 is fitted into the outer periphery of the mounting cylinder 10 of the sprinkler 9 via a fitting hole 12A, and the nut 13 and the lower end of the sprinkler port 4C screwed to the threaded portion 10A from the lower end side of the mounting cylinder 10. It is fastened between and.

The water spray valve 3 according to the prior art is constructed as described above, and the operator's cab 10 is inserted into the wire insertion hole 5A of the valve shaft 5.
1 is attached with one end of a push-pull type flexible wire 14 that can be operated from inside 1, and the flexible wire 14 is pulled by a manual force via a lever 102 provided in the operator's cab 101, so that the valve element 7 causes the valve spring 8 to move. The valve seat is separated from the valve seat 4E and the valve is opened. At this time, the water W is guided from the inside of the sprinkler tank 1 to the connection port 4B side through the drainage pipe 2, and the water W flows down to the sprinkler port 4C side through the gap between the valve seat 5 and the valve body 7. To do. Then, the water W has its flow direction changed upward by the round bottom portion 11A and the dish portion 11B of the water sprinkler 9, and spouts radially from the opening 11C. At this time, the water W is restricted from splashing upward by the water spray plate 12, and is sprayed so as to spread horizontally.

On the other hand, when stopping the sprinkling, if the pulling operation of the flexible wire 14 is released, the valve shaft 5 is urged by the valve spring 8 together with the valve body 7 to move downward, and the valve body 7 is seated. 4E is seated and the water spray valve 3 is closed.

[0012]

In the prior art, the flexible wire 14 is extended from the cab 101 to the rearmost portion of the tank truck 100, and the lever 10 is moved.
Since the flexible wire 14 is pulled and operated via the flexible wire 14, it is difficult to attach the flexible wire 14 to the vehicle body or the water sprinkler tank 1 in a pullable manner, and the lever operation becomes heavy at the sliding portion of the flexible wire 14 or the like. In some cases, it is difficult to smoothly open and close the water spray valve 3 manually.

As another conventional technique, an air cylinder or the like is provided on the valve body 4 of the sprinkling valve 3 on the protruding end side of the valve shaft 5, and air is supplied to or discharged from the air cylinder to move the valve shaft 5. It is also known that the valve body 7 is opened and closed by driving, but in this case, since the air cylinder largely protrudes from the valve body 4 of the water spray valve 3, the mounting for the air cylinder is performed. A special space is required, the number of parts increases, the assembly process becomes complicated, and the cost increases.

The present invention has been made in view of the above-mentioned problems of the prior art. The present invention can prevent the mounting space from becoming large, can form the whole compactly, and can open and close the valve element easily. The purpose is to provide a sprinkling valve that can be.

[0015]

In order to solve the above problems, the present invention has a sprinkler tank side connection port and a sprinkling port, and an annular valve seat is provided between the connection port and the sprinkling port. A formed valve main body, a valve shaft whose proximal end side is located near the connection port side and is attached to the valve main body, and a distal end side extends toward the valve seat side, and a proximal end side slides on the valve shaft. A cylindrical cylinder with a lid, which is provided so that the tip end side extends toward the valve seat side so as to surround the tip end side of the valve shaft, and the cylinder is displaced and fixed to the tip end side of the cylinder. The valve body that separates from and sits on the valve seat, the valve spring that normally biases the valve body in the valve closing direction, the inner peripheral side is fixed to the tip side of the valve shaft, and the outer peripheral side slides in the cylinder. A piston defining an air chamber between the cylinder and the base end of the cylinder by being inserted into the cylinder and the valve shaft. Is, in order to open the valve body against the valve spring adopts a structure comprising an air passage for supplying air to said air chamber from outside of the valve shaft.

[0016]

With the above structure, when air is supplied from the outside into the air chamber through the air passage of the valve shaft, the air pressure at this time causes the cylinder to slide on the outer peripheral side of the piston to expand the air chamber. The valve body fixed to the tip side of the cylinder moves away from the valve seat against the valve spring, and the water sprinkling valve can be opened to sprinkle water from the water sprinkling port.

When the supply of air through the air passage is stopped, the pressure in the air chamber is lowered, and the cylinder is biased by the valve spring and displaced toward the tip of the valve shaft. The valve body thus seated on the valve seat closes the watering valve, and watering can be stopped.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described in detail below with reference to FIG. It should be noted that the same components as those of the above-described conventional technique are designated by the same reference numerals, and the description thereof will be omitted.

In the figure, reference numeral 21 denotes a water spray valve according to this embodiment, which is a valve body 22 and a valve shaft 23, which will be described later.
It is composed of an air cylinder 25, a valve body 28, and the like. Here, the valve main body 22 is substantially the same as the valve main body 4 described in the related art, and the spherical portion 22A defining the valve chamber B inside, the connection port 22B integrally formed in the spherical portion 22A, and the sprinkling port. 22
Although it is composed of C, the boss portion 22D, the valve seat 22E, etc., the boss portion 22D of the valve body 22 projects upward to the outside of the spherical portion 22A and is formed to be shorter than the boss portion 4D according to the prior art. .

Reference numeral 23 denotes a valve shaft provided on the boss portion 22D of the valve body 22 so as to extend upward and downward in the valve chamber B, and the valve shaft 23 has a large diameter portion 23A at the middle thereof. Part 23A
Is formed in a stepped rod shape having a small-diameter base end portion 23B and a tip end portion 23C at both ends thereof, and screw portions 23B1 and 23C1 are formed at both ends of the base end portion 23B and the tip end portion 23C, respectively. The valve shaft 23 has a base end 23B and a boss 22D.
It is attached to the valve body 22 by inserting it from the inside of the valve body 22 and fastening a nut 24 to a screw portion 23B1 protruding outward from the boss portion 22D. The tip portion 23C of the valve shaft 23 extends downward in the valve chamber B toward the center of the valve seat 22E.

Reference numeral 25 denotes a cylinder, and the cylinder 25 has a cylindrical portion 25A and a lid portion 25 for covering the upper end side of the cylindrical portion 25A.
B is formed into a cylindrical shape with a lid, and the cylindrical portion 2 of the cylinder 25
5A is formed to extend above the lid portion 25. Further, the threaded portion 25 is provided on the inner peripheral side of the upper end of the tubular portion 25A.
A1 has a threaded portion 25A2 formed on the outer periphery of the lower end side of the tubular portion 25A, and a sliding hole 25C formed at the center of the lid portion 25B.

Reference numeral 26 denotes a lid attached to the screw portion 25A1 of the cylinder 25, and the lid 26 has the lid portion 25B.
Similarly to the above, a sliding hole 26A is bored, and a screw portion 26B which is screwed into the screw portion 25A1 of the cylinder 25 is formed on the outer peripheral side. The lid 26 is fastened to the screw portion 25A1 of the cylinder 25, and is prevented from loosening by radially tightening the set screw 27 from the upper end side of the tubular portion 25A. Here, the lid body 26 and the cylinder 25 are fitted into the valve shaft 23 through the sliding holes 25C and 26A, whereby the cylinder portion 25A of the cylinder 25 covers the periphery of the lower end side of the valve shaft 23. It is slidably supported by the valve shaft 23 so as to surround and extend toward the valve seat 22E side.

28 is fixed to the lower end of the cylinder 25,
A valve body which is separated from and seated on the valve seat 22E is shown. The valve body 28 has a cylindrical mounting portion 28A having a threaded portion 28A1 formed on the inner peripheral side thereof.
And a disc-shaped valve plate 28B integrally formed on the lower end side of the mounting portion 28A. And the valve body 28
Is fixed to the lower end side of the cylinder 25 by tightening the mounting portion 28A to the threaded portion 25A2 of the cylinder 25, and further by abutting the nut 29 tightened from the base end side of the threaded portion 25A2 with the mounting portion 28A. . Also, the valve plate 28B
A small hole 28C is axially formed in the center of the small hole 2C.
8C constantly communicates the inside of the cylinder 25 with the water spouting port 22 side, thereby compensating for smooth sliding of the piston 31 described later in the cylinder 25.

Reference numeral 30 denotes a valve spring. The valve spring 30 has a structure similar to that of the valve spring 8 of the prior art, but the valve spring 30 is located on the outer peripheral side of the cylinder 25 and has a spherical portion 2.
The valve body 28 is provided between the boss portion 22D of 2A and the valve body 28, and the valve body 28 is always biased downward together with the cylinder 25 so that the valve body 28 is seated on the valve seat 22E.

Reference numeral 31 denotes a thick annular piston fixed to the lower end side of the valve shaft 23. The piston 31 is the valve shaft 23.
It is fixed to the valve shaft 23 by being inserted into the tip portion 23C of the above and tightening the nut 32 from the screw portion 23C1 on the lower end side. The piston 31 is slidably fitted in the cylinder portion 25A of the cylinder 25, and the cylinder 2
The air chamber C is defined between the lid chamber 25 and the lid portion 25B.

Reference numeral 33 denotes an air passage formed in the valve shaft 23. The air passage 33 extends axially from a connecting portion 33A1 formed on the upper end side of the valve shaft 23 to the lower end of the large diameter portion 23A. The axial hole 33A and the lateral hole 33 formed in the radial direction of the large diameter portion 23A so as to communicate with the lower end of the axial hole 33A.
B, and the lateral hole 33B communicates with the inside of the air chamber C.

The sprinkling valve 21 constructed as described above is mounted on the tank truck 100 by replacing the sprinkling valve 3 of the prior art with the flange portion 22B1 of the connection port 22B fixed to the tip end side of the drainage pipe 2. Then, the connecting portion 3 of the valve shaft 23
An air pump (neither shown) is connected to 3A1 via an air pipe or the like provided with an air valve in the middle,
The air valve is operated from within the cab 101 to introduce air from the air passage 33 of the valve shaft 23 into the air chamber C of the cylinder 25 to open and close the water spray valve 21.

That is, when the pressure in the air chamber C exceeds a predetermined pressure, the cylinder 25 slides on the outer peripheral side of the piston 31 and is displaced upward so as to expand the air chamber C. At this time, the cylinder 25 The valve element 28 fixed to the lower end is separated from the valve seat 22E against the valve spring 31 to open the valve. Further, when the supply of air to the air passage 33 is stopped, the pressure in the air chamber C decreases, the cylinder 25 is biased by the valve spring 30 and displaced toward the tip end side of the valve shaft 23, and is fixed to the cylinder 25. The valve body 28 thus seated sits on the valve seat 22E and closes the valve.

The water sprinkling valve according to this embodiment has the above-mentioned structure, and its basic operation is not different from that of the prior art.

However, in this embodiment, the valve body 2 is supplied by supplying / discharging air to / from the air chamber C defined between the cylinder 25 provided in the valve chamber B of the valve body 22 and the piston 31.
Since the valve 8 is seated on and off the valve seat 22E, the water spray valve 21 can be easily opened and closed simply by opening and closing the air valve from within the driver's cab 101 of the tank truck 100. Since the valve shaft 23 and the cylinder 25 are completely housed in the valve body 22, the entire structure can be made compact, and space saving is required when the water spray valve 21 is attached to the vehicle body of the tank truck 100 or the water spray tank 1. As a result, the number of parts can be reduced and the cost can be reduced as compared with the conventional technique in which the air cylinder is provided outside the water spray valve 3.

Further, in the prior art, since the valve shaft 5 of the sprinkler valve 3 and the boss portion 4D of the valve body 4 are liquid-tightly and slidably sealed, maintenance and inspection such as replenishment of grease are required. However, in this embodiment, since there is no sliding portion protruding from the valve main body 22 to the outside, it is easy to form the water spray valve 21 in a liquid-tight manner in advance, so that water leakage may occur from the water spray valve 21. It is possible to eliminate such troubles.

In the above embodiment, the case where the valve spring 30 is provided outside the cylinder 25 has been described as an example, but the present invention is not limited to this, and the valve spring may be provided inside the cylinder 25. In this case, for example, a valve spring may be provided between the piston 31 and the valve plate 28B of the valve body 28.

[0033]

As described above in detail, in the present invention, there is provided a valve body having a sprinkler tank side connection port and a sprinkling port, and an annular valve seat formed between the connection port and the sprinkling port. A valve shaft having a base end side located near the connection port side and attached to the valve body, a tip end side extending toward the valve seat side, and a base end side slidably provided on the valve shaft; A cylindrical cylinder with a lid extending toward the valve seat side so as to surround the tip side of the valve shaft, and a cylinder fixed to the tip side of the cylinder and displaced to the valve seat by displacement of the cylinder. ， With a seated valve
A valve spring that normally urges the valve element in a valve closing direction, an inner peripheral side of which is fixed to the tip end side of the valve shaft, and an outer peripheral side of which is slidably inserted into the cylinder so that the base end of the cylinder is And a piston defining an air chamber between the side and a valve shaft, and air is supplied from the outside of the valve shaft into the air chamber so as to open the valve body against the valve spring. Since the sprinkling valve is composed of the air passage, if air is supplied to the air chamber through the air passage from the outside, the air chamber in the air chamber will cause the cylinder to slide on the outer peripheral side of the piston to move the air chamber. The valve body, which is displaced so as to expand and is fixed to the tip end side of the cylinder, can be separated from the valve seat against the valve spring, and the water spray valve can be easily opened.

When the supply of air to the air passage is stopped, the pressure in the air chamber drops and the cylinder is urged by the valve spring and displaced toward the tip of the valve shaft. The body can be seated on the valve seat to close the sprinkler valve, and the sprinkler valve can be easily opened and closed simply by controlling the supply and discharge of air from the outside.

Further, according to the present invention, the cylinder, the piston and the valve shaft can be completely housed in the valve main body, and the whole can be made compact, and the water spray valve can be mounted on, for example, the vehicle body of the tank truck or the water spray tank. Space-saving installation can be performed, the number of parts can be reduced, and workability during assembly can be improved. Further, since there is no sliding portion such as a valve shaft protruding from the valve body to the outside, it is easy to form the water spray valve in a liquid-tight manner in advance, and it is possible to prevent water leakage and other various effects.

[Brief description of drawings]

FIG. 1 is an enlarged vertical sectional view of a sprinkler valve according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing a tank lorry vehicle provided with a water sprinkling valve according to a conventional technique.

FIG. 3 is an enlarged vertical sectional view showing a watering valve according to a conventional technique.

[Explanation of symbols]

 1 Sprinkling Tank 21 Sprinkling Valve 22 Valve Body 22B Connection Port 22C Sprinkling Port 22E Valve Seat 23 Valve Shaft 25 Cylinder 28 Valve Disc 30 Valve Spring 31 Piston 33 Air Passage C Air Chamber

Claims (1)

[Scope of utility model registration request] 1. A valve body having a sprinkler tank-side connection port and a sprinkling port, and an annular valve seat formed between the connection port and the sprinkling port; Positioned on the valve body, the tip end side extending toward the valve seat side, the base end side slidably provided on the valve shaft, and the tip end side surrounding the tip end side of the valve shaft. A cylindrical cylinder with a lid that extends toward the valve seat side so as to surround it, a valve body that is fixed to the tip end side of the cylinder, and that separates from and sits on the valve seat when the cylinder is displaced, and the valve body. A valve spring that normally urges the valve in the valve closing direction, and an inner peripheral side of the valve spring is fixed to the tip end side of the valve shaft, and an outer peripheral side of the valve spring is slidably inserted into the cylinder to form a base end side of the cylinder. A piston that defines an air chamber between the piston and the valve shaft is formed, and the valve body is opened against the valve spring. A water sprinkling valve comprising an air passage for supplying air into the air chamber from outside the valve shaft.