JPS6110613A - Method of detecting depth of overflow water - Google Patents

Abstract

PURPOSE:To perform reliable detection, by a method wherein two counterweights for a gate opening gauge and detection of a water level are caused to interfer through motion of a float to fluctuate a load, and the fluctuation is fetched as the expansion and contraction action of a spring to actuate an alarm switch. CONSTITUTION:With a water level raised, a float 20 is raised and a counterweight 19 for detection of a water level is lowered. A check piece 21 is brought into contact with a check plate 12 for superposing, the counterweight 19 is conditioned to hang down from a counterweight 10 for a gate opening gauge, and the tension of a wire rope 17 is reduced to zero. A load to a spring 28 is decreased by an amount equivalent to the weight of the counterweight 19, and thereby the spring 28 is expanded, a moving cylinder 26 is pushed up to actuate a switch 30 by means of a striker 32 to alarm an increase of a water level.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a method for detecting overflow depth for ensuring safety by constantly detecting the difference in water level between the inside and outside of a water intake tower installed in a water storage dam. .

[Prior art and its problems]

The design water level difference in a water intake tower installed for the purpose of taking water from the surface of a reservoir is generally designed to be about 3 to 4 meters from the viewpoint of safety. However, due to causes such as a sudden drop in water level in the reservoir, malfunction of automatic operation equipment, delayed operation, incorrect operation, and foreign objects caught in the door body, the required amount of water intake could not be secured, and the water level in the tower dropped rapidly, resulting in structural damage to the tower. There are concerns that things may become dangerous. To prevent this, it is necessary to take security measures that constantly detect the water level difference inside and outside the tower, and if it exceeds the design value, an alarm is immediately issued and water intake is stopped.

By the way, in order to prevent a water level difference exceeding the design value from occurring, it is sufficient to ensure that the overflow water depth is greater than the design value.
With this type of gate intended for surface water intake, the overflow water depth cannot be increased except during intermediate water intake. Therefore, a means to detect this overflow water depth is required, and
Conventionally, a method using a device as shown in Figure 1 has been adopted.

In the device shown in Figure 1, the g! The signal (G2) and the dam water level signal (WX) are input to the operation panel (2) and calculated, and the output is used to operate the gate (3) to follow the fluctuations in the dam water level to determine the overflow water depth. ), and a dam water level needle (4) and a tachometer for the hoisting machine (5) are installed as a display device, and the signals (Wl) (Gl) emitted from these are sent to the control panel (2). The method used was to process it using a dedicated arithmetic unit and then boost its output. However, with this method, the opening gauge, water level gauge, and computing device are 2M equipment, so the cost is high, and the safety device itself uses a computing device, so the overflow water depth (9) The problem was that it did not directly detect , and lacked reliability.

[Purpose of the invention]

The present invention provides a method for automatically and accurately detecting the depth of water overflowing a gate using simple means.

[Structure of the Invention] This invention correlates the operations of the counterweight for the gate opening degree meter and the counterweight for water level detection, and changes the load due to the movement of both counterweights and the float by controlling the movement of the wire rope for water level detection. This is characterized in that the expansion and contraction of the spring at the pulley support point is detected, and this action activates the switch and provides an alarm.

〔Example〕

An embodiment of the present invention will be explained below based on FIG. 2.

That is, (6) is a pulley equipped with an opening gauge (7),
One end of the wire rope (8) with a hook attached to it is connected to the gate (
3), and a counterweight (7) for the opening gauge is suspended from the other end via a round bar (9). In addition, a stop plate (B) with a small hole (B) is fixed to the middle part of the round bar (9), and a hole (To) is provided through the opening gauge counterweight (A). ing.

(2) is a pulley installed at the lower end of the rod α6) supported by the spring mechanism), and one end of the wire rope αη hooked to this pulley is connected to a water level detection counter via a round bar (E). () is suspended from a weight, and () is suspended from a float at the other end. The round bar (E) on which the above-mentioned water level detection counterweight (4) is suspended is connected to the hole (2) of the stop plate (B) explained earlier and the opening meter counterweight hole (B). Insert the
is fixed.

By the way, the distance between the lower surface of the above-mentioned restraining piece @ core and the upper surface of the restraining plate (B) and the distance between the lower surface of the opening gauge counterweight α0) and the upper surface of the water level detection counterweight (B) are as follows: It is determined by the allowable overflow depth variation value (α) in 3). Also) is the above counterweight αO
1. (B) A protective cylinder for the purpose of preventing tilting, preventing foreign objects from getting caught and shaking, and (C) preventing the float from being affected by wind, water currents, and waves. It is a water measuring tube with a reed, and an opening is provided at the bottom end for water to enter and exit.

In addition, the above spring mechanism) is a fixed cylinder (c) and a movable cylinder (c).
.

It consists of 2), of which ne (a) and (c) are housed in iJ,
The movable tube is energized to keep (b) constantly floating, and the pulley 0
A rod 06) supporting → passes through the movable cylinder (c) and is locked at its top end. Also, the fixed tube (c) and the movable tube (
C) (C) serves as a stopper when the spring (C) (C) is fully compressed, and the strength of the spring (C) is determined to meet the following conditions.

(Strength pl of the spring) ■Weight of the weight rod α6) of the pulley α→ Weight of the counterweight (B) + Weight of the movable cylinder (C) <Pl・
...The weight of the weight rod α6) + the weight of the counterweight (b) + the movable tube @IG! Weight of weight (on the float) > Pt...At this time, the total compression (on the spring) is Pl) ■Weight of the pulley 0 + weight of the rod + movable tube C Weight of groan <P2... At this time, the spring (c) is all @ pulley 0
The weight of the rod + the weight of the weight counterweight (e) of the weight of the movable cylinder (c) > P2... At this time) is fully compressed. This is a switch operated by a striker provided on the movable tube (c) (c).

The present invention is carried out in the manner described above with reference to FIG.
) is generally about 10~20~, so the weight of the counterweight α0) is 10~20Kg.
It is. However, one end of the wire rope (8) is connected to the gate (
3), so this Wi-2,0-F(8)
It is possible to increase the weight of the counterweight α@ up to the strength limit of . In addition, the tension of the wire rope αη for water level detection is determined by the weight of the counterweight (to) and the float (a), and it is common to use a counterweight of 2 to 3 Kf. , wire rope α
The tension of η is also 2 to 3 kg. Note that the weight of the float (a) is generally about twice the weight of the counterweight (b), but in this invention, since the float (a) also acts as a weight, it is made slightly larger, about three times the weight. Therefore, when the float (b) is pulled up into the air, the tension in the wire rope (b) is approximately 9 degrees.

Therefore, assuming that the weight of the counterweight (to) is 20Kg, the weight of the counterweight (4) is 3Kf, and the weight of the foot is 9~, below, if the overflow water depth (9) is maintained normally, The following describes the effects when the value becomes too large and when it becomes too small.

(A) When the overflow water depth CD) is maintained normally In this case, the counterweight α0 east and the stop plate (b),
The restraining pieces Q◇ are separated and do not interfere with each other. Therefore, the counterweight (to) is held by the gate (3) via the wire rope (8), and the counterweight (b) is held by the float (1) via the wire rope (b). Therefore, the tension of the wire rope α is the weight of the counterweight (b), that is, 3 Kf. Here, the weight (3 noodles) of the counterweight (B) is added to the spring (C), and it is maintained in a compressed state. At this time, the weight (20 ~) of the counterweight α is added to the spring (b), but it is in a completely stopped state, and neither of the wheels (on the switch) operates.

(B) When the overflow water depth (9) becomes excessive (in the case of rising water level or lowering of gate) When the water level rises, the float () rises and the counterweight (e) lowers. Therefore, the restraining piece (
B) comes into contact with the restraining plate (B) and polymerizes, and the wire rope (E) hangs from the counterweight (TO), and the tension in the wire rope (B) becomes zero. Here, the load on the spring) is the weight of the counterweight (4) (3K
f), the spring (2) expands, and the movable tube (c)
Push up and use the slider to activate switch ■, which will alert you to a rise in the water level. Also wire rope (8)
The tension will be the weight of both counterweights (c) and (4), i.e. 23cm, but since one end of it is connected to the gate (3), there will be no problem with weight balance and the opening meter (a) has no adverse effect on.

(0) When the overflow water depth (D) becomes excessive Ak (when the water level drops or the gate rises) When the water level falls, the float also falls and the counterweight rises accordingly. There, the counterweight (4) comes into contact with the counterweight αO)K,
When this is lifted up, the weight of both (23Kf) exceeds the weight (94)f: of the float, so even if the water level drops further, the float does not fall and remains suspended in the air. At this time, the tension at the wire port (B) is the weight of the float (), which is 9.Then, the load on the spring is the weight of the weight counterweight (E) of the float (12~). 9KI! will increase, so not only the spring (b) but also the spring (b) will be compressed, and as the movable tube (b) descends, the striker (00) will activate the switch (switch) to warn of a drop in the water level. At this time wire rope (8)
The tension is the weight of the float (a) - the counterweight (
Although the weight of (b) decreases by 6 points to 14 Kf, it still has sufficient tension, so there is no adverse effect on the opening gauge (γ). According to the present invention, it goes without saying that even when the gate (3) is erroneously operated, a similar response operation is performed and an alarm is issued.

〔Effect of the invention〕

This invention fluctuates the load by causing the counterweight for the gate opening degree meter and the counterweight for water level detection to interfere with each other through the operation of a float, and this fluctuation is extracted as the expansion and contraction movement of a spring, and a switch is activated to issue an alarm. This is a simple method that accurately and sensitively detects increases and decreases in water level and changes in the depth of water overflowing the Tsumashi Gate.

It should be noted that the device has a similar function in response to gate malfunction, and the device that implements this function is much simpler than conventional devices and can be provided at low cost.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a conventional device, and FIG. 2 is a related diagram of a mechanism showing an embodiment of the present invention. (3) is the gate, (6) is the pulley, (8) is the wire rope, (10) is the force weight for the gate opening gauge, (b) is the stop plate, α is the pulley, (b) is the spring mechanism , ,) is a rod, α-6 is a wire lobe, (b) is a counterweight for water level detection, (a) is a float, and (c) is a restraining piece. Patent applicant: Hitachi Zosen Corporation (Figure 1 Procedural amendment written form) August 3, 1985 Patent application No. 59-47598 2. Name of the invention Overflow water depth detection method 3. Relationship with the person making the amendment Case Application Address: 14 Homare, Edo @i-chome, Nishi-ku, Osaka City, Osaka Prefecture (511) Hitachi Zosen Corporation 4, Agent 5, Date of Amended Ordinance 1 and 2 July 30, 1985
Contents of day correction

Claims (1)

[Claims] The operations of the counterweight for the gate opening gauge and the counterweight for water level detection are related, and the fluctuation of the load due to the movement of both counterweights and the float is extracted as the expansion and contraction movement of the spring at the pulley support point of the wire rope for water level detection. A method for detecting overflow water depth, characterized in that this action activates a switch and issues an alarm.