JPH09112716A - Valve for fire fighting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the size and weight of a valve for fire fighting which is opened and closed due to the turn of a valve element stored in a valve case by providing a valve seat which communicates with an opening on a flow-out side and comes into slide-contact with the valve element on one side of the valve case. SOLUTION: An outer face of a valve element 11 is formed on a knotched spherical face formed by rotating semi-circular arc having a center and both ends on a center line L of turn of the valve element 11 around the center line L of turn by substantially 1/4, and an inner face is formed by providing a predetermined thickness in the direction of inside from the outer face of the valve element 11 to form the valve element 11 which is spherical by 1/4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire fighting valve.

[0002]

2. Description of the Related Art Conventionally, a valve has been installed in the middle of a hose line for fire fighting to cut off or branch water flow. The valve is fast to operate and has a resistance when fully opened. Fewer ball valves are used.

On the other hand, in the case of a large-scale fire (for example, the Great Hanshin Earthquake), a large-diameter hose (for example, 4 inches or more) is used to send a large amount of water (amount of water sent per hour). Is requested.

[0004]

However, when a large-diameter hose is used, a large-diameter valve is naturally required, and the valve becomes large and heavy, and it is transported to a fire site and connected to the hose. Also, there is a problem that it is inconvenient for work such as opening and closing the valve.

Further, if a large-diameter valve is opened suddenly, the reaction of water discharge may be suddenly increased, which may be dangerous, and if closed rapidly, there is a problem that the hose may burst due to a mallet action. .

[0006]

Therefore, in the present invention, a valve seat is provided on one side of the valve case, the valve seat communicating with the outflow side opening and capable of sliding contact with the valve body housed in the valve case. In a fire-fighting valve that opens and closes by rotation of a valve body, an outer surface of the valve body is a semi-circular arc having a center and both ends on the rotation centerline of the valve body, with a center of the rotation centerline being approximately 1
A valve for fire fighting characterized in that it is formed into an aspherical surface formed by rotating / 4 rotation, and an inner surface is formed by providing a predetermined thickness inward from the outer surface to form a 1/4 spherical valve body. Is intended to be provided.

[0007] The present invention also has the following features.

A branch opening is formed in the valve case separately from the outlet opening, and a branch valve is attached to the branch opening to enable branch water supply.

The valve rotating shaft and the handle for opening and closing the valve are interlockingly connected via a valve opening / closing device composed of a worm type reduction mechanism.

[0010]

According to the structure of claim 1, since the valve body has a quarter-sphere shape, the valve body can be lightened, and the space for moving the valve body can be small. The valve can be made smaller and lighter.

According to the second aspect of the invention, the water supply to the main hose line can be opened and closed or the water supply can be branched by operating the valve and the branch valve.

According to the third aspect of the present invention, since the manual operation is slowed down by the valve opening / closing device, the valve body can be gradually opened and closed. Also, the operating force for opening and closing the valve can be reduced.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings.

1 to 4 show a fire fighting valve A according to the present invention. The fire fighting valve A comprises a main valve 1 and
It is composed of a branch valve 5 attached to the main valve 1.

The main valve 1 is, as shown in FIGS.
A valve body 11, a valve case 12 that encloses the valve body 11, an inflow side hose connection portion 13, an outflow side hose connection portion 14, and a valve body 11
And a valve opening / closing device 4 for rotating.

The valve body 11 is made of a light alloy such as corrosion-resistant aluminum, and is made of a valve case as shown in FIGS. 2 and 4.
It is continuously provided at the lower end of a valve rotation shaft 15 having a substantially round bar shape through which 12 is inserted, and as shown in FIGS. 5 and 6, the axis of the valve rotation shaft 15, that is, the rotation of the valve body 11. A semi-circular arc having a center and both ends on the dynamic center line L is rotated about 1/4 around the rotation center line L to form an open surface 16 as an outer surface 16, and a predetermined thickness is provided from the outer surface 16. The inner surface 17 to form a valve body
It is formed in a 1/4 sphere shape with a void-shaped water passage space 18 inside 11 and upper and lower boss portions 19 and 20 are formed at the upper and lower ends of the valve body 11, and the center of the upper and lower boss portions 19 and 20. A valve rotation shaft fitting hole 21 and a pivot shaft fitting hole 22 are formed in each portion.

As shown in FIGS. 1 to 4, the valve case 12 is formed of a light alloy material such as corrosion-resistant aluminum in a substantially cylindrical shape, and has a central portion whose upper surface extends upward to have a substantially square shape in a plan view. The flange 23 is formed, and the valve rotation shaft insertion hole 24 that reaches the inside of the valve case 12 from the center of the flange 23 is formed, and the valve case 12 is tapered from the middle part to the right end part. The diameter is reduced to form a circular outflow side opening 25 on the right end surface.

Then, the valve turning shaft 15 is inserted through the valve turning shaft insertion hole 24, and the lower end portion of the valve turning shaft 15 is inserted into the valve turning shaft fitting hole 21 of the upper boss portion 19. , The fixing pin 26 that is inserted through the upper boss portion 19 and the lower end portion of the valve rotation shaft 15.
These are fixed together, and the upper end of a pivot 28, which is screwed from the outside by inserting the lower surface of the valve case 12 into the pivot insertion hole 22 of the lower boss 20, is rotatably fitted.

A substantially cylindrical outflow-side hose connection portion 14 is attached to the outflow-side opening portion 25 through a plurality of bolts 30, and a hose fitting (see FIG. While forming a male screw 31 for screwing (not shown),
A valve seat fitting groove 32 is formed at the joint surface between the outflow side hose connection portion 14 and the valve case 12, that is, at the inner peripheral edge of the outflow side opening 25 and the left inner peripheral edge of the outflow side hose connection portion 14, and the valve seat fitting groove 32 is formed. Groove 32
Substantially U made of a flexible material for slidingly contacting the valve body 11.
A valve seat 33 having a ring-shaped cross section is fitted in, the valve seat 33 is slidably contacted with the outer surface 16, and the outflow side opening is formed by the rotation of the valve body 11.
I am trying to open and close 25.

A substantially cylindrical inflow side hose connection 13 is attached to the inflow side opening 34 of the valve case 12 via a plurality of bolts 30, and the left side end of the outflow side hose connection 14 is attached. , Female thread 36 for screwing in a hose fitting (not shown)
The ring-shaped nut 37 with the
Is rotatably mounted via a large number of balls 38 inserted in ball grooves formed on the outer peripheral surface of the left end portion and the right inner peripheral surface of the ring-shaped nut 37.

The valve opening / closing device 4 is a worm type speed reducing mechanism attached to the flange 23, and as shown in FIGS. 1, 2 and 4, the worm sector 41 fitted to the upper end of the valve rotating shaft 15 is used. And the worm that meshed with the worm sector 41
An indicator 46 for displaying the valve opening degree is provided on the upper surface of a gear case 45 enclosing the worm sector 41 and the worm 42.

The branch valve 5 is made of a light alloy such as corrosion-resistant aluminum, and as shown in FIGS. 1, 3 and 4, it has the same structure as the main valve 1 but a small size. An opening / closing lever 52 is continuously provided on the upper end of the valve rotating shaft 51, and a valve opening / closing position is held by a detent ball 54 urged by a spring 53. A branch valve case 55 is provided on a side surface of the valve case 12. It is attached to the formed branch opening 56 via a plurality of bolts 30. 57
Is a branch hose connection.

1 to 4, reference numeral 60 denotes a pedestal,
It is formed of a plurality of substantially L-shaped metal fittings 61 and strip-shaped metal fittings 62, and is attached to the fire-fighting valve A by the bolts 30. Heads of four bolts for connecting the metal fittings 61, 62 to each other. By grounding at 63,63,63,63, the fire-fighting valve A placed on the ground is stabilized, and further, the mounting plates 64,64 having a substantially triangular shape and the tops of the mounting plates 64,64 are provided. A handle 66 consisting of a round bar-shaped grip 65 installed between
It is attached to the opposite side of the handle 44 through a bolt 30 to facilitate transportation, valve opening / closing operation, and hose connection work.

In FIG. 1 and FIG. 4, 67 is a pressure gauge for detecting the water supply pressure.

FIG. 7 shows each hose connection portion of the fire-fighting valve A.
29, 35 and 57 show a main hose line 72 and a branch hose line 73 formed by connecting hoses 70 and 71, respectively. By operating the main valve 1, the water supply of the main hose line 72 is opened and closed and adjusted. Alternatively, by operating the branch valve 5, it is possible to branch water supply from the main hose line 72 to the branch hose line 73 and adjust the amount.

In particular, the valve element 11 is not a perfect spherical shape,
A valve body 11, which is formed into a hollow 1 / 4-sphere shape having a water passage space 18 inside and is a main member of the fire-fighting valve A,
By constructing the valve case 12, each hose connecting portion 29, 35, 57, the branch valve 5 and the like with a light alloy, the overall fire-fighting valve A can be reduced in weight, and the valve body 11 is 1/4.
Since it is formed in a spherical shape, the space required for the movement of the valve body 11 can be reduced, the left-right length can be shortened, and the valve can be downsized.

Further, since the quarter-spherical water passage space 18 is formed inside the valve body 11, water can be flowed linearly when the valve is fully opened, and the water supply resistance of the main hose line 72 is minimized. Can be limited.

In addition, when a large amount of water is sent using the main valve 1 having a large diameter, it may be dangerous to open and close the valve abruptly. Since it is designed to open and close, sudden opening and closing of the valve element 11 is prevented, and the above danger can be prevented.
Further, the operation force for opening and closing the main valve 1 can be reduced to facilitate the operation.

By mounting the pedestal 60 on the fire-fighting valve A, the stability when the fire-fighting valve A is placed on the ground is improved and the hose can be easily connected. By attaching the, it is possible to easily carry the valve A for fire fighting and open / close the valve.

[0030]

According to the present invention, the following effects can be obtained.

According to the first aspect of the invention, that is, a valve seat is provided on one side of the valve case, the valve seat communicating with the outlet opening and capable of sliding contact with the valve body housed in the valve case. In a fire-fighting valve that opens and closes by rotating, the outer surface of the valve element is rotated about a quarter arc around the rotation center line so that a half arc having a center and both ends on the rotation center line of the valve body is rotated. The valve body is formed in the formed spherical surface, and the inner surface is formed by providing a predetermined thickness inward from the outer surface to form the 1/4 spherical valve body, so that the valve body has the 1/4 spherical shape. From
Since the valve body is lightweight and the space for moving the valve body is small, it is possible to reduce the size and weight of the fire-fighting valve, and it becomes easy to carry and install it at a fire site.

According to a second aspect of the present invention, that is, a branch opening is formed in the valve case separately from the outlet opening.
By installing a branch valve at the same branch opening to enable branch water supply, it is possible to open and close the main hose line water supply and branch water supply to the branch hose line by operating the valve and the branch valve. Water can be sent to the discharge destination.

According to the third aspect of the invention, that is, the operation of the handle is decelerated by interlocking the valve rotating shaft and the handle for opening and closing the valve through the valve opening and closing device including the worm type speed reducing mechanism. Since it is transmitted to the valve body, it is possible to prevent the danger associated with the sudden opening and closing of the valve by gradually opening and closing the valve body. Also, the valve opening / closing operation can be facilitated by reducing the operation force for opening / closing the valve.

[Brief description of the drawings]

FIG. 1 is a plan view of a fire-fighting valve according to the present invention.

FIG. 2 is a sectional view taken along line I-I of FIG.

FIG. 3 is a sectional view taken along line II-II of FIG.

FIG. 4 is a sectional view taken along line III-III in FIG.

FIG. 5 is a plan view of a valve body.

6 is a sectional view taken along line IV-IV in FIG.

FIG. 7 is a plan view of a hose line.

[Explanation of symbols]

 A Fire-fighting valve L Rotation center line 4 Valve opening / closing device 5 Branch valve 11 Valve body 12 Valve case 15 Valve rotating shaft 16 Outer surface 17 Inner surface 25 Outflow side opening 33 Valve seat 41 Worm sector 42 Worm 44 Handle 56 Branch opening

Claims (3)

[Claims] 1. A valve seat communicating with the outlet opening (25) on one side of the valve case (12) and capable of sliding contact with the valve body (11) housed in the valve case (12). In a fire-fighting valve (A) which is provided with (33) and is opened and closed by the rotation of the valve body (11), the outer surface (16) of the valve body (11) is connected to the rotation center line of the valve body (11).
(L) Draw a semi-circular arc with the center and both ends above the rotation center line.
It is formed into a truncated spherical surface formed by rotating about 1/4 around (L), and the inner surface (17) is formed by providing a predetermined thickness inward from the outer surface (16) to form a 1/4 spherical shape. A valve for fire fighting, which is characterized in that the valve body (11) is formed. 2. The outlet side opening (2) in the valve case (12).
The branch opening (56) is formed separately from 5), and the branch opening is formed.
The valve for fire fighting according to claim 1, wherein a branch valve (5) is attached to the (56) to enable branch water supply. 3. A valve opening / closing device comprising a worm type speed reducing mechanism.
The valve for fire fighting according to claim 1 or 2, wherein the valve rotation shaft (15) and the handle (44) for opening and closing the valve are interlockingly connected via (4).