JPS5841214Y2 - Bypass valve opening/closing device with gate - Google Patents

Description

[Detailed description of the invention] This invention relates to a bypass valve opening/closing device with a gate, and its purpose is to maintain reliability of operation by preventing the bypass valve from becoming clogged with lumber, dirt, etc. There is a particular thing.

For gates installed in dams, conduits, water pipes, water discharge pipes, etc., especially high-pressure gates, the water pressure on the upstream and downstream sides is balanced before hoisting, thereby reducing the power required to hoist the gate. In some cases, a bypass valve is built in to suppress this.

A conventional example is shown in FIGS. 1 and 2.

This consists of a bypass channel 2A provided in the gate 1 and a lid 2B fixed to the lower end of a rod 4 hanging vertically from the gate lifting beam 3. The opening and closing of the lid 2B moves the lifting beam 3 relative to the gate 1. This is done by raising and lowering the

That is, when the gate 1 is hoisted or lowered, since the gate 1 is hoisted via the hoisting beam 3, the bypass valve 2 remains open, and as the gate 1 descends and lands, the hoisting Bypass valve 2 closes due to the weight of beam 3.

When the water pressure is to be balanced between the upstream side and the downstream side, the lifting beam 3 is hoisted up to the gate 1 by the required amount, the bypass valve 2 is opened, and this state is maintained until the water pressure is balanced.

After the water pressure is balanced, the gate 1 is connected via the lifting beam 3.
Wind up and open the waterway.

However, according to such a device, when the gate 1 is lowered, the bypass valve 2 is still open when the gate 1 reaches the doorstop 5, so that the bypass valve 2 is still open, so that lumber, garbage, etc. in the flowing water can be removed. becomes clogged, and the subsequent lifting beam 3
A situation often occurs in which the bypass valve 2 is not completely closed even when the cylinder is lowered.

The present invention has been devised in view of the above, and according to it, after the gate is hoisted up, the bypass valve is closed before the gate is hoisted down, and the gate can be hoisted in this state, thereby making it possible to lower the gate while the gate is being hoisted down. Water can be prevented from flowing through the bypass valve, and after the gate is lowered and before the gate is raised, the bypass valve can be unclosed and opened to balance the water pressure.

The embodiment will be described below with reference to FIGS. 3 and 4, and FIGS. 5 to 12 showing the operating state.

Reference numeral 11 denotes a gate, and the upper end of the gate 11 has an engaging part 13 for the lifting beam 12 and a pin 14 for maintaining the lifting posture, and the lower part of the retaining part 13 has an elevating space 15 for the lifting beam 12. have

The suspension beam 12 has a valve rod 16 that is penetrating and can be moved up and down.
is provided.

The valve rod 16 has a pair of upper and lower flanges 17A and 17B that sandwich the lifting beam 12, and a spring 18 is interposed between the lower collar 17B and the lifting beam 12 to bias the valve rod 16 downward. Ru.

A bypass valve 19 has a lid 19A fixed to the lower end of the valve rod 16, and a bypass passage 19B provided in the gate 11.

Therefore, the bypass valve 19 is opened and closed by raising and lowering the lifting beam 12 within the space 15.

In that case, the closed state of the bypass valve 19 is always maintained by the action of the spring 18 when the lifting beam 12 is near its lowering limit within the space 15.

The lifting beam 12 is a cable body 20 suspended from a hoisting machine (not shown).
It is suspended via a sheave 21.

Therefore, after the lifting beam 12 rises within the space 15 due to the hoisting operation of the hoisting machine, it engages with the engaging portion 13, and in this state, the gate 11 is hoisted up.

A locking/disengaging device 22 is provided between the lifting beam 12 and the gate 11.

As shown in FIGS. 5 to 12, the locking/disengaging device 22 consists of a hook 23 and a lever 25 having a retaining pin 24 at its tip.

The base end of the lever 25 is swingably suspended from the lifting beam 12 via a horizontal shaft 26, and a weight 27 is fixed to the intermediate portion thereof.

A stopper 28 is fixed to the lifting beam 12 to prevent the lever 25 from swinging, which is biased by the weight 27, and to hold the lever 25 in a vertical position.

On the other hand, the hook 23 is provided protrudingly on the lower wall of the space 15 on the gate 11 side, and has a downward protrusion 30 at its upper end to form a locking hole 29.
The guide surface 3 is inclined to gradually descend toward the outer edge of the
1.

The hook 23 and the engagement pin 24 are connected to the lifting beam 12.
The lever 25 is provided in such a positional relationship that it can be engaged and disengaged by swinging around the horizontal shaft 26 only when the retaining pin 24 is located near its lowering limit.

33 is a projecting rod, which is held by the gate 11 so as to be able to move up and down.

When the protruding rod 33 protrudes from the gate 11, its lower end 33A is configured to protrude slightly lower than the gate lower end 11A.

A metal fitting 34 is fixed to the upper end of the projecting rod 33.

35 is an inclined plate, and this inclined plate 35 is inclined in the direction along the guide surface 31, and its lower end is connected to the metal fitting 3.
4 via a shaft 36 parallel to the horizontal shaft 26.

A spring 37 is interposed between the inclined plate 35 and the metal fitting 34 to elastically support the inclined plate 35 in the above-mentioned inclined position.

Further, between the inclined plate 35 and the projecting piece 30 of the hook 23, a rocking path 38 for engaging and disengaging the engagement pin 24 with respect to the hook 23 is formed.

This swing path 38 is closed by the inclined plate 35 that rises together with the raised lever 33 when the lower end 33A of the raised lever is raised to the same level as the lower end of the gate 11A (
(Situation shown in Figure 10).

A hook 39 is suspended above the hoisting path of the gate 11 via a gate frame (not shown). It can be attached and detached.

40 is a door stop section.

Note that the projecting rod 33, metal fitting 34, inclined plate 35, and spring 37 are not shown in FIGS. 3 and 4.

Next, the operation will be explained.

FIG. 5 shows that the hoisting machine is operated with the locking and disengaging device 22 in the disengaged state, thereby retracting the rope body 20, thereby engaging the lifting beam 12 with the engaging portion 13, and lifting the gate 11. It is shown in a state where it is rolled up together with the upper beam 12 and the pin 14 is locked to the hook 39.

At this time, since the lifting beam 12 is at the upper limit of its lifting space 15, the bypass valve 19 is in an open state.

When the lifting beam 12 is lowered in this state, the gate 11
Since the lifting beam 12 is locked to the hook 39 via the pin 14, the lifting beam 12 descends within the lifting space 15.

Therefore, the engagement pin 24 is connected to the engagement inclined guide surface 3 of the hook 23.
1, it descends along the guide surface 31 in a state of contact.

As a result of this operation, the lever 25 swings against the biasing force of the weight 27 as shown in FIG. invade.

At this time, the bypass valve 19 is closed.

Next, the lifting beam 12 is hoisted up.

As a result, the lifting beam 12 rises, so that the square engagement pin 24 engages with the hook 23 as shown in FIG. , hook 39 and pin 1 as shown in Figure 8.
4 is released.

The action of releasing the hook 39 from the pin 14 is performed manually or mechanically.

After releasing the engagement between the hook 39 and the pin 14, the lifting beam 12 is lowered.

As a result, the gate 11 passes through the intermediate state shown in FIG. 9, and then its lower end 11A lands on the door stop 40 as shown in FIG.

At this time, the elongated lever 33 also hits the doorstop 40, and its lower end 33A is ejected to the same level as the gate's lower end 11A, so that the inclined plate 35 rises to a position where it closes the engagement/disengagement swing path 38, as shown in FIG. .

In this case, the inclined plate 35 comes into contact with the engagement pin 24, and the spring 3
The inclined plate 35 moves slightly downward against the biasing force 7.

Subsequently, as the retaining pin 24 descends, the inclined plate 35 is prevented from further lowering against the bias of the spring 37, and the engagement/disengagement swing path 38 is opened.

Therefore, the engagement pin 24 is guided by the inclined plate 35 and pulled out from the locking hole 29, passing through the intermediate state shown in FIG. 11 and then entering the state shown in FIG. 12.

After this, when the cable is retracted, first the bypass valve 19
is opened, and then the gate 11 is raised, resulting in the state shown in FIG.

The same operation is repeated thereafter.

As is clear from the above description, according to the present invention, the bypass valve is closed prior to lowering the gate, so it is possible to prevent the bypass valve from becoming clogged with lumber, dirt, etc. when the gate is landed.

On the other hand, when hoisting the gate, the bypass valve is first opened and the water pressure on the upstream and downstream sides of the gate is balanced, so a small hoisting machine can be used.

[Brief explanation of drawings]

1 and 2 show a conventional example, with FIG. 1 being a partially cutaway schematic front view and FIG. 2 being a longitudinal side view. 3 and 4 show an embodiment of the present invention, with FIG. 3 being a partially cutaway schematic front view and FIG. 4 being a schematic vertical sectional side view. 5 to 12 are schematic longitudinal sectional side views showing the operating state of the embodiment of the present invention. 11... Game l~, 12... Lifting beam, 13... Engaging portion, 14... Pin,
15...Hoisting beam lifting space, 19...
・Bypass valve, 19A...Lid, 19B...
... Bypass flow path, 22 ... Engagement and disengagement device, 2
3...Hook, 24...Engagement pin, 2
5...Lever, 26...Horizontal axis, 27.
... Weight, 29 ... Locking hole, 31.
...Incline guide surface, 33...Protruding rod, 3
5... Inclined plate, 36... Axis, 37...
... Spring, 38 ... Engagement/disengagement swing path, 39.
·····hook.

Claims (1)

[Scope of utility model registration request] A bypass valve is provided in a gate having an engagement part with a lifting beam at its upper end and a space for raising and lowering the beam at its lower part, and the bypass valve is configured to be opened and closed by raising and lowering the lifting beam within the space. The base end of the lever, which has a retaining pin at the tip, is hung vertically on the lifting beam so that it can swing around the horizontal axis, and a hook that can be engaged and detached is fixed to the gate side when the pin is near its lowering limit. The hook is provided with an inclined guide surface that guides the pin to the locking hole in a state of contact when the pin is lowered, and the hook is located at a position where the rocking path for engaging and disengaging the locking pin with respect to the locking hole is closed and opened. An inclined plate is provided so as to be inclined in a direction along the guide surface, and the inclined plate is provided on the gate so as to be movable up and down, and whose lower end protrudes below the lower end of the gate. The lever is supported at the upper end of the rod so as to be swingable around an axis parallel to the horizontal axis, and when the inclined plate is in a position blocking the engagement/disengagement swing path between the inclined plate and the protruding rod. A spring is interposed to elastically support the inclined plate to maintain the state, and a hook is provided on one side of the upper part of the gate winding path and the upper end of the gate, and a pin is provided on the other side that can be connected to and detached from the hook. Features a bypass valve opening/closing device with a gate.