JPH0336580Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an opening/closing device for a bypass valve with a gate.

Some gates that can open and close a waterway are equipped with a bypass valve that partially discharges water before opening the gate to balance the water pressure upstream and downstream. Conventional examples of such gates will be explained based on FIGS. 1 to 3. First, in Figures 1 and 2, 1
is a gate composed of a web material 2, a flange material 3 and a skin plate 4, and a main roller 5
and side rollers 6, the waterway 7 is raised and lowered.
It is said that it can be opened and closed. 8 is a sealing rubber. A pair of pulley boxes 9 are installed on both sides at the top of the gate 1, and between the two pulley boxes 9,
A horizontal suspension girder 12 to which pulleys 11 are attached extends across both ends 10 of the pulley box 9. As shown in FIG. 3, upper and lower girder locking parts 13A and 13B are provided in the pulley box 9 to which both ends 10 of the hanging girder 12 can be locked. It is designed to be able to move relative to the gate 1 in the vertical direction between 13A and 13B.

A wire rope (not shown) from a hoisting device (not shown) above the gate 1 is wound around the pulley 11, and the hanging girder 12 is configured to be able to be driven up and down. That is, the hoisting device moves the hanging girder 12 vertically relative to the gate 1, and supports the gate 1 by the hanging girder 12 when its both ends 10 come into contact with the girder locking portions 13A. Thus, both 12 and 1 are raised and lowered together. A rest shaft 14 is provided at the upper end of the pulley box 9, and is engaged with a rest hook 15 provided at the gate rest position at the rising end of the gate 1, as shown in FIG. Gate 1 can be hung and stored.

A valve chamber 18 is provided in the gate 1 and communicates with the upstream side of the waterway 7 via the screen 16 and with the downstream side of the waterway via the discharge pipe 17. At the connection part with
A bypass valve 19 is provided. In this bypass valve 19, 20 is an upward valve seat;
21 is a valve body, and a vertical valve rod 22 fixed to the suspension girder 12 is attached to the valve body 21. That is, the bypass valve 19 is opened and closed by vertically moving the valve rod 22 together with the hanging girder 12 relative to the gate 1. 23 is a guide rod for guiding the vertical movement of the valve body 21.

The operation of the above configuration will be explained based on FIG. First, when the gate 1 is in the landing state, the bypass valve 19 is in the closed state, and when hoisting the gate 1, the hanging girder 12 is first raised to open the bypass valve 19, and the water is discharged from the bypass valve 19. The downstream water pressure is brought into a balanced state, and then the hanging girder 12 is raised continuously and locked to the pulley box 9, and the gate 1 is then opened. By the way, when the gate 1 is in the hoisting halt state as shown in FIG. The hanging girder 12 is rolled up and its both ends 10 are locked to the girder locking portions 13A of the pulley box 9.
At this time, the bypass valve 19 opens. Next, as shown in c, the hanging girder 12 is further rolled up, and the hanging girder 12 is
The weight of the gate 1 is supported by the
Remove gate 1 from pause hook 15. Thereafter, it is lowered as shown in d, but at this time, since both ends 10 of the suspension girder 12 support the girder locking portion 13A, the bypass valve 19 is in a fully open state.

In this way, in the above-mentioned conventional one, the suspension girder 12
Since the valve stem 22 is directly attached to the valve, the bypass valve 19 is always attached when lowering the gate 1.
is fully open, and in this case, after the gate 1 has landed on the floor, the bypass valve 19 is opened by lowering the suspension girder 12.
Since the valve body 21 and the valve seat 2 are closed, the valve body 21 and the valve seat 2
There is a risk of water leakage due to dust etc. getting stuck between the 0 and 0.

Therefore, the purpose of the present invention is to completely close the bypass valve when the gate is lowered, thereby eliminating the concern of dirt and debris getting caught in the gate as in the conventional method.

In order to achieve this purpose, the present invention provides a gate that can open and close the waterway by lifting and lowering, and is movable vertically relative to the gate within the gate. A hanging girder is provided that is locked downward to the gate and supported by the gate in the rest position and the closed position of the gate. A hoisting device is provided that raises and lowers the gate that is locked to the gate, and a bypass valve that can be maintained in a closed state by its own weight and that is opened and closed by a vertically movable valve rod is provided in the gate, The hanging girder is capable of opening and closing freely, and when the hanging girder is closed, it engages with the valve stem and suspends the valve stem, so that as the hanging girder moves up and down with respect to the gate, the bypass is connected to the valve stem through the valve stem. A hook is provided to open and close the valve, and when the suspension girder moves downward within the gate, this hook can close due to its own weight and engage the valve stem of the closed bypass valve, causing the gate to rise. A hanging rod is provided at the gate resting position at the end, and this hanging rod can be raised and lowered integrally with the hanging girder at the gate resting position, and also comes into contact with the hook and presses the hook at this resting position. The valve is configured to be biased to open, and this pressing force to open the valve is such that when the hook suspends the valve stem and the bypass valve is open, the hook cannot be opened due to the weight of the hook and the valve stem. In addition, when the bypass valve is closed and its weight is not applied to the hook, the hook is opened to prevent engagement between the hook and the valve stem.

Therefore, when lowering the gate, the hanging girder is moved downward in the gate's rest position to close the bypass valve, and the hook is opened by the hanging rod to connect the hook to the valve stem. By opening the bypass valve, the bypass valve can be brought into a fully closed state, and there is no possibility of dust or the like getting caught in the bypass valve, which was a concern with conventional valves, and water leakage can be prevented. In addition, the hanging rod can be raised and lowered integrally with the hanging girder when the gate is in its rest position, and the hook and valve stem only engage when the bypass valve is fully closed and its weight is no longer on the hook. This allows the bypass valve to be closed without impacting the bypass valve or its valve seat.

Hereinafter, one embodiment of the present invention will be described based on FIGS. 4 to 8. In addition, in FIGS. 4 to 8, the same members as those shown in FIGS. 1 to 3 are given the same numbers, and their explanations will be omitted.

4 to 7, the hanging beam 12 is provided with a horizontal hook shaft 24, and a hook 25 is swingably attached to the hook shaft 24. 26 is a counterweight fixed to the hook 25. On the other hand, a hanging hardware 27 is attached to the upper end of the valve stem 22, and this hanging hardware 27 is provided with a pin 28 that can engage with the hook 25. A hook 25 is attached to the hook shaft 24.
A lever 29 is attached that swings together with the hook opening/closing hardware 3.
Connected to 0. The hook opening/closing hardware 30 is movable in the vertical direction along a guide 31 provided on the hanging beam 12, and is configured such that the hook 25 is opened by pressing the hook opening/closing hardware 30 downward. Note that when the above-mentioned pressing force is released, the hook 25 closes under its own weight.

As shown in FIGS. 6 and 7, 32 is a machine base plate in the gate rest position, and a hoisting device 33 for hoisting and lowering the gate 1 is provided. Although not shown, the wire rope 34 from the hoisting device 33 is connected to a pulley 35 provided on the machine base plate 32.
It is wound around the pulley 11 of the suspension girder 12 through the .
The aforementioned stop hook 15 is also attached to the machine base plate 32.

A vertical casing 38 consisting of a cover 36 and a guide pipe 37 is provided on the machine base plate 32 above the hook opening/closing hardware 30 of the hanging girder 12. A hanging rod 39 that can come into contact with the hook opening/closing hardware 30 is suspended. That is, the stopper 4 is located at the upper end of the hanging rod 39.
0 is fixed, and the suspension rod 39 is suspended by the stopper 40 being engaged with a locking member 41 inside the casing 38. 42 is a weight attached to the hanging rod 39. Here, if the gate 1 is rolled up, the lower end of the hanging rod 39 will come into contact with the hook opening/closing hardware 30, but if the hook 25 is not engaged with the pin 28 as shown in FIG. The weight of the hanging rod 39 including the weight 42 overcomes the weight of the hook 25 to open it. However, as shown in FIG. 6, when the hook 25 engages with the pin 28 to suspend the valve stem 22, even if the hanging rod 39 comes into contact with the hook opening/closing hardware 30, it cannot overcome the weight. In this case, the hook 25 will not open. Note that FIG. 6 shows a state in which the gate 1 is being hoisted up, and FIG. 7 shows a state in which the gate 1 is at rest.

The operation of the above configuration will be explained based on FIG. First, in the rest state of the gate 1 as shown in a, the gate 1 is hung on the rest hook 15, and the hanging rod 39 is attached to the hook opening/closing hardware 3.
By pressing 0, the hook 25 is in the open state,
Bypass valve 19 is fully closed.

When lowering the gate 1, first the hanging girder 12 is rolled up as shown in b by the hoisting device 33 shown in FIGS. 6 and 7. When the suspension girder 12 comes into contact with the girder locking portion 13A, the gate 1 is suspended, so the suspension hook 15 is removed. At this time, the hanging rod 39 is attached to the hook opening/closing hardware 30.
It is pushed up by the weight of the hook opening/closing hardware 3.
0 and the hook 25 remains open. Next, roll down the gate 1 as shown in c. Along with this, the hanging girder 12 also descends, the hanging rod 39 is restrained by the locking member 41 and separated from the hook opening/closing hardware 30, and the hook 25 is closed.
However, since the suspension girder 12 is locked to the girder locking portion 13A, the hook 25 is located upward and the pin 28
The gate 1 is not engaged, and the gate 1 is lowered with the bypass valve 19 fully closed.

As shown in d, when the gate 1 is fully closed and lowered and lands on the bottom 43, the hoisting device 33
Only the hanging girder 12 is further lowered without stopping. Then, as shown in e, the lower edge 44 of the hook 25
contacts the pin 28, this hook 25 opens, and when it is further lowered, the hook 25 kicks the pin 28 with its own weight and automatically opens this pin 28, as shown in f.
engage with. As shown in f, when the gate 1 is fully closed, the hanging girder 12 is lowered and the girder locking part 13B
This will be supported by

When hoisting up the gate 1, the hanging girder 12 is hoisted up slightly as shown in g, and the bypass valve 19 is opened by hoisting the valve stem 22 with the hook 25 while the gate 1 remains fully closed. Then, water is discharged from the discharge pipe 17 through the bypass valve 19, and the upstream and downstream water pressures are brought into a balanced state. When the water pressure is in a balanced state, the suspension girder 12 is further rolled up as shown in h, and the girder locking portion 13A is
1 and lift the gate 1. At this time,
By hanging the valve stem 22 by the hook 25, the bypass valve 19 is fully opened.

When gate 1 is hoisted up to near the rest position,
As shown in i, the hook opening/closing hardware 30 hits the hanging rod 39. However, at this time, the hook 25 engages with the pin 28 and suspends the valve stem 22 and valve body 21, and their weight overcomes the weight of the suspension rod 39, and the hook 25 does not open. Then, the gate 1 is further rolled up and the rest hook 15 is placed on the rest shaft 14 to support the gate 1. Next, only the suspension girder 12 is lowered. Then, the state returns to the state shown in a, the bypass valve 19 is fully closed, and the weight of the valve rod 22 and valve body 21 is supported by the valve seat 20. As a result, the hook opening/closing hardware 30 is pushed down by the hanging rod 39 for the first time, and the hook 25 is opened as shown in a.

As described above, according to the present invention, when lowering the gate, the bypass valve can be fully closed by releasing the engagement between the hook and the valve stem, which was a concern with conventional ones. Not only is it possible to prevent water leakage by eliminating all debris, but also when the hook suspends the valve stem and the bypass valve is open, that is, until the bypass valve is fully closed due to the lowering of the hanging girder. Since the opening movement of the hook is prevented and a situation where the hook comes off the valve stem and the valve stem falls is prevented, it is possible to prevent the generation of impact on the bypass valve and its valve seat.

[Brief explanation of the drawing]

Fig. 1 is a front view of the conventional example, Fig. 2 is a sectional view of its right side, Fig. 3 is a diagram showing its operating state, and Fig. 4 is a front view of the conventional example.
The figure is a front view of one embodiment of the present invention, Figure 5 is a sectional view of the right side thereof, Figure 6 is a diagram showing the state of the gate in Figure 4 during hoisting, and Figure 7 is a diagram showing the gate at rest. FIG. 8 is a diagram showing the operating state of the components shown in FIGS. 4 to 7. 1...Gate, 7...Waterway, 12...Hanging girder, 19...
Bypass valve, 22... Valve stem, 25... Hook, 3
3...Hoisting device, 39...Hanging rod.

Claims (1)

[Scope of utility model registration request] A gate is provided that can open and close the waterway by lifting and lowering, and is movable vertically relative to the gate within the gate, and is latched upward to the gate when hanging the gate.
In addition, in the rest position and the closed position of the gate, a hanging girder is provided that is latched downward to this gate and supported by this gate, and this hanging girder is suspended, and the hanging girder is latched to this hanging girder and this hanging girder. A hoisting device is provided for raising and lowering the gate together with the gate;
A bypass valve that can be maintained in a closed state by its own weight and that is opened and closed by a vertically movable valve stem is provided on the suspension girder, and that can be opened and closed freely and engages with the valve stem when it is closed. By suspending this valve stem, a hook is provided that opens and closes the bypass valve via this valve stem as the hanging girder moves up and down with respect to the gate, and this hook allows the hanging girder to move downward within the gate. When the bypass valve is closed by its own weight, it can be engaged with the valve stem of the closed bypass valve, and a hanging rod is provided at the gate rest position at the rising end of the gate, and this hanging rod In this position, it can be raised and lowered integrally with the suspension girder, and in this rest position, it is configured to abut against the hook and bias the hook to open by pressing, and this biasing force to open the valve is caused by the hook pressing the valve stem. When the bypass valve is suspended and the valve is open, it is impossible to open the hook due to the weight of these hooks and the valve stem, and when the bypass valve is closed and the weight is not on the hook, this hook must be opened. An opening/closing operating device for a bypass valve with a gate, characterized in that it is configured to prevent engagement between a hook and a valve stem.