JPS5841215Y2 - 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 the reliability of its 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 up or lowered, since the gate 1 is hoisted up via the hoisting beam 3, the bypass valve 2 remains open, and as the gate 1 descends and lands on the floor.

The bypass valve 2 closes due to the weight of the lifting 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 lowering the gate 1, the bypass valve 2 is still open until the gate 1 reaches the door stop 5, so that the bypass valve 2 is exposed to lumber and debris in the flowing water. A situation often occurs in which the bypass valve 2 becomes clogged and the bypass valve 2 is not completely closed even when the lifting beam 3 is lowered thereafter.

The present invention has been developed 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. 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 13 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.

19 is a bypass valve, and its lid 19A is connected to the valve rod 16.
The bypass flow path 19B is fixed to the lower end of the gate 1.
1.

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 lower part in 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 retaining 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 13, the locking and disengaging device 22 is
Engagement pin 23 and projecting rod 2 provided on the gate 11 side
4, a vertical extension rod 25 and a hook 26 provided on the lifting beam 12 side.

That is, the engagement pin 23 is supported horizontally by the gate 11 via a bracket 27, and the projecting rod 24 is held by the gate 11 so as to be able to move up and down, and the projecting rod 24 projects from the gate 11. In the state where the lower end 24A
is configured to protrude slightly downward from the lower end of the gate 11A.

A projecting tool 28 is fixed to the upper end of the projecting rod 24. On the other hand, the vertical retractable rod 25 is supported on the side of the lifting beam 12 via a support 29, and its lower end faces the protruding tool 28.

The base of the hook 26 is swingably suspended from the lifting beam 12 via a horizontal shaft 30, and the lower surface of the tip thereof is configured as an inclined guide surface 31.

This inclined guide surface 31 contacts the engagement pin 23 as the hook 26 descends, and then swings the hook 26 around the horizontal axis 30 following the engagement pin 23, thereby causing the hook 26 to open in the engagement hole. 32 into engagement with the engagement pin 23.

A weight 33, which is an example of biasing means, is attached to the base of the hook 26.
is provided.

This weight 33 is provided at a position slightly deviated from the virtual vertical line passing through the horizontal axis 30, and due to the action of this weight 33, when the hook 26 is engaged with or disengaged from the engagement pin 23, , the hook 26 is biased to maintain its respective state.

Reference numeral 34 denotes a lever, and this lever 34 extends laterally from the base of the hook 26, and a projection 36 protruding from the intermediate portion of the retractable rod 25 is fitted into a long hole 35 at its tip.

Therefore, this lever 34 causes the upward movement of the lever 25, the swinging movement of the hook 26 away from the engagement pin 23, and the movement of the lever 25 upwardly.
The downward movement of the hook 26 and the swinging movement of the hook 26 into engagement with the engagement pin 23 are continuous.

Further, the moment around the horizontal axis 30 due to the weight 33 also acts on the retractable rod 25 via the lever 34.

Therefore, the retractable rod 25 may be in a downward movement position or in an upward movement position depending on whether the weight 33 is on the left or right side of the above-mentioned virtual vertical line.

When the lifting beam 12 is located at the lower part of the space 15 and the lifting rod 24 is pushed up in this state, the ejection rod 2
5 is in the downward movement position, the retractable rod 25 is in the lower position.
8 and moves to the upper movement position.

As the lifting beam 12 rises, the lever 25 in the upward movement position is pushed down by the engaging portion 13 of the gate 11, and moves to the downward movement position.

Reference numeral 38 denotes a hook suspended above the winding path of the gate 11 via a gate frame (not shown). It can be attached and detached.

The hook 38 and pin 14 constitute a locking device.

39 is the door stop section. In addition, the projecting rod 24 and the projecting tool 28
, the egress rod 25, etc. are not shown in FIGS. 3 and 4.

Next, the operation will be explained.

In FIG. 5, the lifting machine is operated with the locking/disengaging device 22 in the disconnected 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 beam 12 and the pin 14 is locked to the hook 38.

At this time, since the lifting beam 12 is located above the lifting space 15, the bypass valve 19 is in an open state.

When the lifting beam 12 is lowered from this state, the gate 11
Since the lifting beam 12 is locked to the hook 38 via the pin 14, the lifting beam 12 descends within the lifting space 15.

Therefore, the inclined guide surface 31 of the hook 26
3, as shown in FIG. 6, the guide surface 31 moves downward while following the engagement pin 23 in a contact state.

This action causes the hook 26 to swing against the biasing force of the weight 33, and then, due to the biasing force of the weight 33, the locking hole 32 swings so that it enters directly below the engagement pin 23 as shown in FIG. move.

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 the square engagement pin 23 engages with the hook 26 as shown in FIG. 9th
As shown in the figure, the engagement between the hook 38 and the pin is released.

The unlatching operation of the hook 38 to the pin 14 is performed manually or mechanically.

After releasing the engagement between the hook 38 and the pin 14, the lifting beam 12 is lowered.

As a result, the gate 11 passes through the intermediate state shown in FIG. 10, and its lower end 11A lands on the door stop 39 as shown in FIG.

At this time, the projecting rod 24 also hits the door stop portion 39, and its lower end 24A is pushed up to the same level as the gate lower end 11A, so that the projecting tool 28 pushes up the extension rod 25 as shown in FIG.

At the same time, the locking hole 32 of the hook 26 is connected to the engaging pin 23.
He moves to a lower level than the former, and the two are separated.

When the lever 25 is pushed up, the hook 26 is released and swung via the lever 34, and the weight 33 is moved to the opposite side via the virtual vertical line.

When the cable is retracted again, the lifting beam 12 moves up in the space 15 through the intermediate state shown in FIG. 12, and engages with the retaining portion 13 as shown in FIG. 13.

Along with this, the bypass valve 19 is opened, and then the gate 11 is rolled up, resulting in the state shown in FIG. 5.

In this case, at the same time as the lifting beam 12 engages with the engaging part 13, the extending/retracting rod 25 in the upward movement position is pushed down by the engaging part 13.

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 pressures on the upstream and downstream sides of the gate are balanced, so a small hoist 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 13 are schematic longitudinal sectional side views showing the operating state of the embodiment of the present invention. 11... Gate, 12... Lifting beam, 13... Engaging portion, 14... Pin, 1
5...Hoisting beam lifting space, 19...
Bypass valve, 19A... Lid, 19B...
・Bypass flow path, 22... Engagement/disengagement device, 23...
...Engagement pin, 24...Protruding rod, 25...
...Upper/lower egress rod, 26...Hook, 28.
...Protrusion tool, 30...Horizontal shaft, 31...
... Inclined guide surface, 32 ... Locking hole, 33.
... Weight, 34 ... Lever, 38.
·····hook.

Claims (1)

[Scope of utility model registration request] A bypass valve is provided in a gate having an engagement portion with a lifting beam at its upper end and a space for lifting and lowering the beam at its lower part, and the bypass valve is opened and closed by lifting and lowering the lifting beam within the space. The gate is provided with an engaging pin and a projecting rod that is raised when the gate lands on the floor, and a vertically extending and retractable rod that is opposite to the projecting rod is provided on the lifting beam side; a hook that can be swung into and out of engagement with the engagement pin, and the egress rod is pushed down by the retaining part when the lifting beam is located at the upper part of the space, and the lifting beam is moved into the space. and is configured to be pushed up by the protruding rod when the gate is in the landing state, and the locking hole of the hook is engaged with the engagement pin when the gate is lowered. An inclined guide surface is provided to guide the hook to the engaging pin, and a biasing means is provided to bias the hook to maintain each state when the hook is engaged with or detached from the engagement pin. A lever is provided between the lever and the hook, which connects the upward movement of the lever and the swinging movement of the hook away from the retaining pin, and the downward movement of the lever and the swinging movement of the hook into engagement with the locking pin. A bypass valve opening/closing device with a gate, further comprising a locking device that supports the gate in its hoisted position.