JPH08303625A - Hydraulic pressure valve - Google Patents

Abstract

PURPOSE: To reduce loss of outflow water in a hydraulic pressure valve which is arranged in a water sprinkling hose in such as an roll car by operating a piston by the use of difference between sensor pressure and water passage pressure in a branched passage generated through reduction of water pressure in a downstream water passage chamber due to trouble, and thereby closing the opening/closing valve. CONSTITUTION: When a hose end is opened, water flows to a downstream water passage chamber C from an upstream water passage chamber A of a main water passage 20 through an opening/closing valve 1. A sensor pressure is supplied to an air chamber B through a valve 2 of a branched passage 5, for compressing air inside the air chamber B. The pressurized air passes a valve 3 of a branched passage 6, being applied to a cylinder chamber D. When a trouble occurs in this state and the pressure inside the water passage chamber C is abruptly decreased, the pressurized air inside the air chamber B flows into the valves 2, 3, at once. The valve 2 is closed while the valve 3 is opened, so that the pressurized air flows to the cylinder chamber D. A piston 10 is moved rightward to close the opening/closing valve 1. Water flow is thus stopped.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a hydraulic valve.

[0002]

2. Description of the Related Art Conventionally, water is sprinkled through a water hose such as a roll car at night or unmanned.

[0003]

Conventionally, water is sprinkled by using a sprinkler hose such as a roll car. However, when the hose is damaged during use, the main plug is stopped after being noticed, and the main plug is allowed to flow until it is stopped. And when you are worried about night work,
It is necessary to check early in the morning whether the main cock is stopped. Therefore, the present invention requires a small amount of water loss even if the sprinkler hose or the like is damaged, the connection fitting is damaged, or the trouble such as disconnection occurs. Alternatively, the purpose is to obtain a hydraulic valve that allows the operator to work with peace of mind.

[0004]

The present invention provides the following hydraulic valve in order to achieve the above objects. That is, an opening / closing valve is provided on the upstream side of the water channel, a cylinder chamber is provided on the downstream side, a piston of the cylinder chamber is provided on a rod that opens and closes the opening / closing valve by an opening / closing lever, and a bifurcated branch path connecting the water channel to the air chamber. And one of the branch passages communicates with the upstream side of the water passage through a valve that opens to the air chamber side, and the other branch passage of the piston that communicates with the downstream side through a valve that opens toward the cylinder chamber of the piston. It is a hydraulic valve which is connected to a cylinder chamber and in which a piston is arranged so that a downstream opening / closing valve during decompression works toward the closing side.

[0005]

[Function] Normally, the same water pressure is applied to the upstream water passage chamber (A), the air chamber chamber (B), the downstream water passage chamber (C), and the cylinder chamber (D) in front of the piston to open the hose tip. As a result, the water flows from the upstream side water channel chamber (A) of the main distribution water channel (20) through the opening / closing valve (1) to the downstream side water channel chamber (C) of the main distribution water channel (22). At this time, the sensor pressure enters the air chamber (B) from the upstream side water channel chamber (A) through the valve (2) of the branch channel (5), compresses the air in the air chamber (B), and Cylinder chamber (D) in front of the piston through the valve (3) in 6)
Is under pressure. When trouble occurs, the pressure in the waterway chamber (C) on the downstream side suddenly drops, and the compressed air in the air chamber (B) flows to the valves (2) and (3) all at once, but the valve (2) closes. Since one valve (3) opens, it flows into the cylinder chamber (D) in front of the piston and moves the piston (10) to the right, which closes the on-off valve (1) and stops the flow of water. .

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments shown in the drawings will be described below.
(A) is an upstream water channel chamber of the main flow channel (20), (B) is an air chamber, (C) is a downstream channel channel of the main flow channel (22), and (D) is a cylinder chamber in front of the piston. .
(1) is a valve for opening and closing the main flow passage, and a spring (12) is wound around the rod (8) between the valve seat (19) and the valve seat (19), and is biased in the direction to open the valve seat opening (19a). Has been done. The water channel (5) branches from the main water channel (20) and connects to the air chamber (B), and the branch channel (5) has a valve (2) that opens to the air chamber (B) side, and a spring (4). The waterway mouth (5a) is always closed at. In the illustrated case, the sealing material (21) (21) improves the sealing performance of the valve (2). In addition, the water passage port (6a) of the other branch passage (6) connected to the air chamber (B)
There is a valve (3) that opens toward the cylinder chamber (D) in front of the piston (10), and the spring (7) always closes the water passage opening (6a), and the sealing material (23) for the valve seat. Good sealing performance. (11) is a cylinder chamber provided on the downstream side, the cylinder chamber (11) communicating with the water channel chamber (C) on the downstream side has a piston (10), and the rod of the opening / closing valve (1). It is provided slidably in (8). The sliding stroke is between the collar plate (9) at the rod end and the ring (9a). The branch passage (6) communicates with the cylinder chamber (D) in front of the piston.

Reference numeral (13) is an opening / closing lever provided on the waterway wall, which moves the rod (16) through the rod (14) and the link (15), and the stopper (18) is attached to the ring (17) of the rod (16). Is moved back and forth, and the piston collar plate (9) is moved by the plug (18). Therefore, the opening / closing valve (1) can be opened by moving the piston rod (8) with the opening / closing lever (13). The cylinder chamber (11) is not blocked by the plug (18) from the water channel chamber (C) on the downstream side. The above water pressure valve device should be installed as close to the main valve as possible in the waterway. The opening / closing valve (1) is opened and closed manually. Normally, the upstream water passage chamber (A), the air chamber chamber (B), the downstream water passage chamber (C), and the water passage chamber (D) in front of the piston have the same water pressure, and the opening / closing lever (13) is used to attach the hose tip. When opened, water flows from the upstream side water channel chamber (A) of the main flow channel (20) through the opening / closing valve (1) to the downstream water channel chamber (C) of the main flow channel (22). At this time, the sensor pressure passes from the upstream channel chamber (A) through the valve (2) into the air chamber (B), compresses the air in the air chamber (B), and passes through the valve (3) to the piston. Pressure is applied to the front cylinder chamber (D), and the same water pressure is applied to the upstream water passage chamber (A), the air chamber (B), the downstream water passage chamber (C) and the cylinder chamber (D) in front of the piston. Therefore, the piston (10) is in the position where it stops at the ring (9a). When trouble occurs, the pressure in the downstream chamber (C) suddenly drops, and the air compressed in the air chamber (B) flows toward the valves (2) and (3) at once, but the valve (2) is Since the road entrance (5a) will be closed,
The valve (3) opens, flows into the cylinder chamber (D) in front of the piston, moves the piston (10) to the right, and when the piston (10) hits the collar plate (9), the on-off valve (1) is opened by the rod (8). ) Moves in the closing direction. Therefore, the open / close valve (1) closes to stop the flow of water. Therefore, there is no loss of water flow, a small amount of water loss is required, and the operator does not need to be careful at all times and can work with peace of mind.

As described above, according to the present invention, a branch passage is provided in the main distribution water passage so as to communicate with the air chamber,
One of the branch passages is connected to the upstream side of the water passage and the air chamber via a valve that opens to the air chamber side, and the other branch passage is connected to the cylinder chamber through a valve that opens to the cylinder chamber side in front of the piston. A sensor pressure water channel was formed, and due to a trouble, the water pressure in the downstream channel chamber dropped, which created a difference between the sensor pressure in the branch channel and the water channel pressure, which acted on the piston to close the on-off valve. It is a thing.

[0009]

According to the present invention, even if troubles such as damage of the sprinkler hose or the like, damage of the connection fitting, disconnection, etc. occur, a small amount of water loss will suffice, so the operator can feel at ease.

[Brief description of drawings]

FIG. 1 is a sectional view of a hydraulic valve of the present invention.

[Explanation of symbols]

 A upstream waterway chamber B air chamber C downstream waterway chamber D piston chamber 1 open / close valve 2 valve 3 valve 4 spring 5 branch path 6 branch path 7 spring 8 rod 9 collar plate 10 piston 11 cylinder 12 spring 13 open / close lever 14 rod 15 Link 16 Rod 17 Ring 18 Stopper 19 Valve seat 20 Main flow channel 21 Seal material 22 Main flow channel 23 Seal material

Claims (1)

[Claims] 1. An opening / closing valve is provided on the upstream side of the water channel, a cylinder chamber is provided on the downstream side, a piston of the cylinder chamber is provided on a rod that opens and closes the opening / closing valve by an opening / closing lever, and the water chamber connects to the air chamber. A fork is provided, and one of the branches is connected to the upstream side of the water channel through a valve that opens toward the air chamber, and the other branch is connected to the downstream side through a valve that opens toward the cylinder chamber of the piston. A hydraulic valve in which the piston is connected to the cylinder chamber, and the piston is arranged so that the opening / closing valve on the downstream side at the time of decompression works toward the closing side.