JPH0650441A - Structure of connecting part of gate - Google Patents

Abstract

PURPOSE:To reduce the friction coefficient between seats and to reduce the operating force to open a valve element by providing an opening to eject the high pressure liquid onto at least either of joined surfaces on the valve element side or on the yoke side in a gate where the valve element slides along the valve yoke. CONSTITUTION:In gates used for the clean water supply system, the sewage system, and the river water system, a valve element seat 4 is brought into pressed contact with a valve yoke seat 5 due to the hydrostatic load in the direction of the arrow. When a gate is opened in this condition, a pump is first driven, the high pressure air or the high pressure water is fed through a hose 10 to a passage 7 provided in a valve element 1 and a passage 9 provided in a valve yoke 6, and an air cushion or a high pressure water cushion is formed between the valve element seat 4 and the valve yoke seat 5. This constitution reduces the friction coefficient between the respective seats 4, 5 close to 0, and under this condition, opens the gate by driving an opening/closing device 3 and pulling the valve element 1 upward. This arrangement allows easy opening/closing operation of the gate, and downsizes the driving device 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure for water, sewage, river water gate and movable weir.

[0002]

2. Description of the Related Art Water, sewage, river water gates and movable weirs are provided with plate-shaped valve bodies and valve frames, and the valve bodies slide up and down to control the flow rate of fluid. In addition, there is a conventional gate joint structure in which metal is used for a valve body and a valve frame seat, and the valve body seat opens and closes while contacting the valve frame seat with a metal touch. In addition, there is a roller gate in which a roller is attached to the valve body side or the valve frame side in order to reduce the friction coefficient between the valve body and the valve frame seat.

[0003]

However, in the conventional gate joint structure described above, when the valve body seat and the valve frame seat made of metal are rubbed against each other under a hydraulic load, the coefficient of friction is about 0.3. growing. In order to reduce the friction coefficient, there is a problem that even a roller gate having rollers on the valve body side and the valve frame side has a friction coefficient of about 0.1, which is not smaller than that.

The present invention has been made in order to solve the above-mentioned conventional problems, and has a structure in which the gate and the movable weir have a very small coefficient of friction between the seats when the gate and the movable weir are subjected to a hydraulic load. Is intended to provide.

[0005]

In the gate joint structure of the present invention, an opening for ejecting a high-pressure fluid is provided on at least one joint surface on the valve body side or the valve frame side.

[0006]

With the above structure, when the valve body receives a hydraulic load, high-pressure air or high-pressure fluid such as high-pressure water is sent to the joint between the valve body seat and the valve frame seat to supply air to the valve body side and the valve frame side. Creates a water cushion to make the coefficient of friction when sliding extremely small, making it easy to open and close the gate.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a perspective view of a gate having a joint structure according to an embodiment of the present invention, FIG. 2 is an enlarged view of a joint between a valve body and a valve frame,
FIG. 3 is a perspective view of the valve body seat. In this FIG.
The lower end of the valve rod 2 is connected to the center of the upper end of the plate-shaped valve body 1 reinforced with ribs, and the valve rod 2 is moved up and down above the valve rod 2 to open and close the valve body 1 manually or electrically. A device 3 is provided. On both sides of the valve body 1, a long valve body seat 4 is vertically installed, and a valve frame 6 is disposed on which a valve frame seat 5 facing the valve body seat 4 is vertically installed.

A flow path 7 through which a high-pressure fluid such as high-pressure air or high-pressure water flows is provided inside the valve body 1. The flow path 7 penetrates the valve body seat 4 and its opening is open to the valve frame 6 side. And is provided on the joint surface of the valve body 1. A longitudinal groove 8 for evenly distributing high pressure air or high pressure water is formed in the central longitudinal direction of the valve frame sheet 5. A flow passage 9 for high-pressure air or high-pressure water is also provided in the valve frame 6, the flow passage 9 penetrates the valve frame seat 5, and an opening is provided in the valve frame 6 with an opening to the valve body 1 side. ing. As shown in FIG. 1, a hose 10 is connected to the flow paths 7 and 9 of the valve body 1 and the valve frame 6 so that high-pressure air or high-pressure water is fed.

Next, the operation of the above configuration will be described. Normal,
Since a hydraulic load is applied to the gate in the direction of the arrow in FIGS. 1 and 2, the valve body seat 4 is in pressure contact with the valve frame seat 5. Therefore, when operating the gate from the closed state to the open state in FIG. 1, first, a pump (not shown) is driven to send high pressure air or high pressure water into the flow paths 7 and 9 through the hose 10. Make an air cushion or high water pressure cushion between the seats 4 and 5. The air cushion or the high water pressure cushion brings the friction coefficient between the valve body seat 4 and the valve frame seat 5 close to zero. Therefore, the opening / closing device 3 is driven manually or electrically to pull the valve body 1 upward. At that time, the opening and closing speed of the valve body 1 is increased by the air cushion or the high water pressure cushion,
When the switchgear 3 is manually operated, the handle operation becomes very easy, and the electric power requires a small amount of electric power, so the motor of the switchgear 3 can be downsized.

After the gate is opened, the pump is stopped to stop the high pressure air or the high pressure water sent to the hose 10. When operating the valve body 1 from the open state to the closed state, first, the pump is driven to feed the high pressure air or the high pressure water into the flow paths 7 and 9, and the air cushion or the high water pressure cushion is attached to the joint surfaces of the seats 4 and 5. Opening and closing device 3
To lower the valve body 1. Even when the valve body 1 is lowered, the valve body seat 4 is lowered without pressure contact with the valve frame seat 5 by the air cushion or the high water pressure cushion between the seats 4 and 5, and the closing operation of the valve body 1 is very easy. Can be done.

The gate junction structure of the present invention may be a small gate for tap water or sewage, or may be used for a large movable weir. In the above-described embodiment, the valve body 1 and the valve frame 6 are provided with the flow paths 7 and 9 for passing air or water, but they may be provided in only one of them. Further, the flow paths 7 and 9 may be directly provided in the valve body seat 4 or the valve frame seat 5 without passing through the valve body 1 or the valve frame 6.

Further, although the vertical grooves 8 are formed in the sheets 4 and 5, the sheets 4 and 5 are not limited to those in which the vertical grooves 8 are formed, and the openings of the flow paths 7 and 9 are simply expanded. It may be like that.

[0013]

As described above, according to the present invention, the friction coefficient between the seats can be made extremely small by forming an air cushion or a high water pressure cushion between the valve body side and the valve frame side. Since the force required for opening and closing is small, the opening and closing device can be made smaller than before, and the opening and closing speed of the valve element can be increased. Further, since the valve body seat and the valve frame seat do not come into direct contact with each other, wear of the seat is eliminated and durability is improved.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a gate having a junction structure according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a joint portion between the valve body and the valve frame according to the embodiment of the present invention.

FIG. 3 is a perspective view of a valve body seat according to an embodiment of the present invention.

[Explanation of symbols]

 1 Valve body 6 Valve frame 7 Flow path 9 Flow path

Claims (1)

[Claims] 1. A gate in which a valve body slides along a valve frame, wherein an opening for ejecting a high-pressure fluid is provided on a joint surface of at least one of the valve body side and the valve frame side. Gate junction structure.