JP3139911B2 - Watertight door lock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a watertight device for a water gate for opening and closing a water discharge channel formed in a multipurpose dam for flood control, power generation and the like.

[0002]

2. Description of the Related Art As shown in FIG. 4, a water discharge channel 2 formed in a multipurpose dam 1 is opened and closed by a water gate door 4 which pivots up and down about a pivot shaft 3, and is provided at an opening peripheral portion 2a of the water channel 2. The watertightness of the gate 4 is maintained by the annular watertight member 5.

Conventionally, the watertight member 5 comprises an annular rubber elastic plate 6 and a rubber elastic tube 7 disposed on the back side of the elastic plate 6 as shown in FIG. The plate 6 is fitted into a recess 8 formed in the opening peripheral portion 2a of the water channel 2, and the peripheral portions 6a, 6a are supported by a pair of stoppers 9, 9 bolted to the opening peripheral portion 2a. By supplying pressurized water from the pressurized water supply pipe 10 to the elastic tube 7, the elastic tube 7 is expanded, whereby the elastic plate portion 6 is elastically deformed as shown by the imaginary line in FIG. The projecting part 6b is connected to the floodgate 4
To maintain water tightness.

[0004]

In the above-mentioned conventional configuration,
The watertight member 5 is composed of an elastic plate 6 and an elastic tube 7 made of rubber, and is inferior in durability (wear resistance), and its life is 1/10 to 20 minutes of the life of the gate (about 100 years). 1
Therefore, it is necessary to replace the watertight member 5 as a whole at an interval of about 5 to 10 years, so that the maintenance cost is high and the sluice door 4 of the elastic plate 6 has the intermediate opening shown in FIG. There is a possibility that the portion which is not pressed against is abnormally deformed due to the expansion of the elastic tube 7, the peripheral portion 6 a comes out from between the concave portion 8 and the stopper 9, and the watertightness cannot be maintained. Maintenance is troublesome and troublesome.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a watertight device for a floodgate that can reliably maintain watertightness for a long period of time and enables maintenance-free operation.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a dovetail-shaped annular recess formed at the periphery of an opening of a water channel which is opened and closed by a floodgate, and inserted into a deep portion of the annular recess. that Do and a protrusion protruding to the outside from the entrance of integrally protruding from an annular recess in the piston unit and the piston unit to be
Hard material made annular watertight member is contact-separation freely arranged with respect to water gates, the inner surface and the bottom of the piston portion of the annular recess
Sealing material is interposed between both side edges on the front side and both sides on the top side
Piston portion of the annular recess as a double seal configuration
A closed chamber is formed, and the annular watertight member is pressed by the pressurized water supplied into the closed chamber, and the protruding portion thereof is pressed against the gate.

[0007]

In the above construction, when closing the water channel,
After closing the sluice door, it is only necessary to supply pressurized water to the closed chamber. Thereby, the watertight member is pressed by the pressurized water supplied to the closed chamber, and the protruding portion is pressed against the watergate door, so that the watertightness between the watergate door and the water channel can be reliably maintained.

In this case, since the watertight member is formed of a hard material such as metal or carbon fiber material, the watertight member has excellent durability (abrasion resistance), and its life is substantially equal to the life of the gate. And the maintenance cost is low, and even when the gate is in the intermediate opening state, the part of the watertight member that does not press against the gate is not abnormally deformed by the pressure water applied to the closed chamber, ensuring reliable operation. It is possible to maintain watertightness and to make maintenance-less possible.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 3 show a watertight device according to an embodiment of the present invention.
The metal annular substrate 10 is fixed to the opening peripheral edge 2a of the base plate, and on the substrate 10, an inner stopper 11 having a concave step 11a formed on the outer peripheral edge and a concave step 12a formed on the inner peripheral edge. The outer stoppers 12 are respectively fastened by bolts 13, whereby the substrate 10 and both stoppers 11, 12 are fixed.
A dovetail-shaped annular concave portion 14 is formed between the watertight member 5 and the watertight member 5.

The watertight member 5 is made of a metal such as a copper alloy or a non-ferrous alloy or a hard material having excellent durability (wear resistance) such as a carbon fiber material. 15 and a projecting portion 16 integrally projecting from the center of the upper surface of the piston portion 15 and projecting outside through the entrance 14b of the annular concave portion 14.

A pair of seal members 18 made of an elastic material such as rubber are interposed between the annular groove 17 formed on both side edges of the bottom surface of the piston portion 15 and the substrate 10 so that the piston portion 15 and the substrate 10 A watertight member 5 is pressed by supplying pressurized water from the water injection hole 20 to the closed chamber 19, and the distal end surface of the protrusion 16 is pressed against the sluice door 4. It has become.

A pair of annular grooves 21 formed on both sides of the upper surface side of the piston portion 15 and respective catches 11, 1 opposed thereto.
A pair of annular grooves 22 formed in the two concave steps 11a, 12a
And a pair of sealing members 2 made of an elastic material such as rubber.
The sealing chamber 19 is double-sealed, and the piston member 15 is movably held by the sealing members 18 and 23 at the center of the annular recess 14 in the inner portion 14a. I have.

In the above configuration, when the water channel 2 is closed, the water gate 4 is closed, and then pressurized water (for example, dam water or pressurized water is added to the dam water) from the water injection hole 20 to the closed chamber 19. Pressure water). Thereby, as shown by the imaginary line in FIG. 1, the watertight member 5 is pressed against the elastic force of the sealing member 23 and the protruding portion 16 is pressed against the sluice door 4. Between the two can be reliably maintained.

In this case, since the watertight member 5 is formed of a hard material such as metal or carbon fiber material, the watertight member 5 is excellent in durability (abrasion resistance). ), The maintenance cost is low, and even when the sluice door 4 is in the intermediate opening state, the portion of the watertight member 5 which is not pressed against the sluice door 4 is the pressure applied to the closed chamber 19. It is possible to reliably maintain watertightness without being abnormally deformed by water, and to make maintenance-less possible.

As shown in FIG. 3, for example, a substantially T-shaped groove or recess is formed in a joint 25 between the end faces of the watertight member 5, and a filler 26 made of rubber, synthetic resin, or the like is formed therein.
To prevent the pressurized water supplied into the closed chamber 19 from leaking from the joint 25.

Here, as shown in FIG.
The relationship between the width a of the pressure receiving surface receiving the pressure water of No. 5 and its surface pressure Pa and the width b of the pressure receiving surface abutting on the sluice door 4 of the protrusion 16 and its surface pressure Pb is Pb · b = Pa · a. , Pb =
Since the relational expression of Pa · a / b is obtained, the width a of the pressure receiving surface for receiving the pressure water of the piston portion 15 and the pressure receiving surface of the projecting portion 16 contacting the sluice door 4 are set so as to satisfy the relationship of Pb> Pa. If the width b is set, watertightness can be reliably ensured.

[0017]

According to the present invention, since the watertight member is formed of a hard material such as metal or carbon fiber, the watertight member has excellent durability (abrasion resistance). It can be maintained for about the same length of time, the maintenance cost is low, and even when the gate is in the middle opening state, the part of the watertight member that does not press against the gate is abnormally deformed by the pressure water applied to the closed chamber. Therefore, it is possible to reliably maintain watertightness and to make maintenance-less possible.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part of a watertight device for a floodgate according to one embodiment of the present invention.

FIG. 2 is a perspective view of the watertight member.

FIG. 3 is a front view of the watertight device.

FIG. 4 is a schematic perspective view showing an intermediate opening state of a water channel.

FIG. 5 is a cross-sectional view of a main part showing a conventional example.

[Explanation of symbols]

 2 Waterway 2a Periphery of waterway opening 4 Water gate 5 Watertight member 14 Annular recess 15 Piston portion of watertight member 16 Projection of watertight member 19 Sealed chamber

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E02B 7/42 E02B 7/54 E02B 9/06

Claims (1)

(57) [Claims] 1. A dovetail-shaped annular concave portion is formed at the peripheral edge of an opening of a water channel opened and closed by a floodgate door, and a piston portion inserted into a deep portion of the annular concave portion and an annular projecting portion formed integrally with the piston portion. hard <br/> material made annular watertight member Do that and a protrusion protruding from the entrance of the recess to the outside is contact-separation freely arranged with respect to water gates, an inner surface and a bottom surface of the piston portion of the annular recess
Sealing material is interposed between the side edges and the top side.
As a double seal configuration,
A watertight door, wherein a more partitioned closed chamber is formed, and the annular watertight member is pressed by the pressurized water supplied into the closed chamber, and a protruding portion thereof is pressed against the watergate door. Watertight equipment.