JPH0714324U - Water level detector - Google Patents

Abstract

(57) [Abstract] [Purpose] Even if the breakwater pipe 3 is installed in a small water absorption tank 1, by suppressing the vertical movement of the water surface inside the breakwater pipe 3, it is possible to detect an appropriate water level, and drain water. Prevents malfunction of the pump. [Structure] A breakwater tube 3 having a plurality of communication holes 2, 2 ... Formed in the lower part is installed inside the water absorption tank 1 so that the inside of the breakwater tube 3 communicates with the water absorption tank 1 and A float type water level gauge 4 is installed inside the wave tube 3, and between the three floats 4A, 4B, 4C constituting the float type water level gauge 4,
The vertical movement restraining members 5, 5 ... Composed of disks formed through the plurality of small holes 5a, 5a in the axial direction are arranged so as to restrain the vertical movement of water in the wave preventing tube 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a water level detection device that detects a water level in a water absorption tank and outputs an operation control signal to a drain pump based on the detected water level.

[0002]

[Prior art]

 In this type of conventional water level detecting device, as shown in FIG. 4, a wave breaker 3 having a plurality of communication holes 2, 2 ... The inside of the water tank is connected to the water absorption tank 1, and the float type water level gauge 4 in which, for example, three floats 4A, 4B, 4C are provided at predetermined intervals in the vertical direction, is installed inside the breakwater tube 3. It is structured. Therefore, the water level in the water absorption tank 1 is detected by the floats 4A, 4B, and 4C constituting the float type water level gauge 4, and a control signal is output to a drain pump (not shown) based on the detected water level, and It is designed to control driving.

By the way, there is a need to make the water absorption tank 1 as small as possible in order to reduce the construction cost. However, by installing the breakwater tube 3 inside the small water absorption tank 1, the breakwater tube 3 is affected by the generation of Karman vortex and the flow to the suction bell mouth of the drainage pump, and Although the water surface has not changed, a large vertical movement occurs on the water surface in the breakwater pipe 3. As a result, the float 4C detects the operation stop water level and outputs an operation stop signal to the drain pump to stop the operation of the drain pump even though the water level of the water absorption tank 1 has not dropped to the operation stop water level of the drain pump. Malfunction occurs.

[0004]

[Problems to be solved by the device]

 The problem to be solved is to install a breakwater pipe inside the miniaturized water absorption tank in order to reduce the construction cost, and the breakwater pipe causes the Karman vortex generation and the flow to the suction bellmouth of the drainage pump. As a result, the water surface in the breakwater will be greatly moved up and down, which will prevent proper detection of the water level, which will cause malfunction of the drainage pump.

[0005]

[Means for Solving the Problems]

 The present invention relates to a water level detecting device in which a water breakage tube is installed in communication with the water absorption tank and a water level gauge is installed in the water breakage tank. The vertical motion suppression member that suppresses the upward and downward movement of water is arranged, and even if a wave breaker is installed in a small water absorption tank, the vertical movement of the water surface inside the wave breaker is suppressed to ensure proper movement. Achieved the purpose of enabling the water level detection and preventing malfunction of the drainage pump.

[0006]

[Action]

 According to the present invention, the vertical movement restraining member arranged inside the breakwater tube can restrain the vertical movement of water in the breakwater tube. As a result, even if the breakwater pipe is installed in a small water absorption tank, a large vertical movement does not occur on the water surface inside the breakwater pipe, and the water level can be properly detected. As a result, malfunction of the drainage pump is prevented.

[0007]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical sectional view of the present invention. It should be noted that the same or corresponding portions as those of the conventional example will be described with the same reference numerals. In FIG. 1, a breakwater tube 3 having a plurality of communication holes 2, 2 ... Formed in the lower part is installed inside the water absorption tank 1 to communicate the inside of the breakwater tube 3 with the water absorption tank 1. A float type water level gauge 4 having, for example, three floats 4A, 4B and 4C provided at predetermined intervals in the vertical direction is installed inside the breakwater tube 3. Therefore, the water level in the water absorption tank 1 is detected by the floats 4A, 4B, and 4C forming the float type water level gauge 4, and a control signal is output to a drain pump (not shown) based on the detected water level, and the drain pump Control driving.

Between the three floats 4A, 4B, 4C constituting the float type water level gauge 4, a plurality of vertical movement suppressing members 5, 5 ... For suppressing vertical movement of water are arranged. That is, each vertical movement suppressing member 5, 5 ... Is made of a disc formed by penetrating a plurality of small holes 5a, 5a. For example, by fixing it to the rope 4R of the float type water level gauge 4, it is coupled so that it cannot move in the axial direction.

With such a configuration, the vertical movement of water inside the wave preventing tube 3 passes through the plurality of small holes 5a formed in the plurality of vertical movement suppressing members 5, 5 ... It occurs only in a small amount of water. That is, the vertical movement of most of the water inside the wave protection tube 3 is suppressed by the wide area other than the plurality of small holes 5a, 5a .... Therefore, since the water absorption tank 1 in which the breakwater pipe 3 is installed is small, even if the breakwater pipe 3 is affected by the generation of Karman vortices or the flow to the suction bellmouth of the drainage pump, the inside of the breakwater pipe 3 is affected. There is no significant vertical movement on the water surface. As a result, it is possible to properly detect the water level and prevent malfunction of the drainage pump.

In the above embodiment, one float 4A, 4B, 4C is arranged between the plurality of vertical movement suppressing members 5, 5, ... Thus, the two floats 4A, 4A1, 4B, 4B1 may be arranged between the upper and lower motion suppressing members 5, 5, .... Further, as shown in FIG. 3, by connecting the lower end portion of the rope 4R to the lowermost vertical movement suppressing member 5 and making the lowermost vertical movement suppressing member 5 function as a weight, The use of the weight 4W shown in FIG. 2 can be omitted, the radial movement of the breakwater tube 3 is prevented, and the floats 4A, 4B, 4C interfere with the inner surface of the wall of the breakwater tube 3. Therefore, the proper operation of the water level gauge 4 can be secured. Further, the plurality of small holes 5a, 5a ... Are configured to be detachably closed by a plug (not shown), and the amount of water passing through the plurality of small holes 5a, 5a. The followability can be adjusted according to the water level.

[0011]

[Effect of device]

 As described above, according to the present invention, in order to reduce the size of the water absorption tank and reduce the construction cost, the water absorption tank is downsized, and by installing the wave protection tube in this small water absorption tank, Even if the Karman vortex is generated and the flow of the suction bell mouth of the drainage pump is affected, a large vertical movement does not occur on the water surface in the breakwater tube. Therefore, it is possible to detect the proper water level, and it is possible to reliably prevent the malfunction of the drainage pump.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a vertical sectional view showing a modified example of the present invention.

FIG. 3 is a vertical sectional view showing another modification of the present invention.

FIG. 4 is a vertical sectional view showing a conventional example.

[Explanation of symbols]

 1 Water absorption tank 3 Wave breaker 4 Float type water level meter (water level meter) 5 Vertical motion suppression member

Claims (1)

[Scope of utility model registration request] 1. A water level detecting device in which a wave breaker is installed in communication with the water catcher inside the water catcher, and a water level gauge is installed in the wave breaker. A water level detecting device comprising a vertical movement suppressing member arranged to suppress vertical movement of water.