CN202836650U - Detachable water conservation project small-flow seepage measuring device - Google Patents

Abstract

The utility model provides a detachable water conservation project small-flow seepage measuring device which is composed of a detachable weir plate (1), a flow guiding water channel (2), a measurer shell (3), a water containing funnel (4), a tipping bucket type flowmeter (5) and a pulse generation counter (6). A groove (10) and a sealing strip (11) are arranged on the lower portion of the weir plate (1) and matched with a V-shaped water outlet channel on a measuring weir, water is enabled to flow into the tipping bucket type flowmeter (5) through the flow guiding water channel (2) and the water containing funnel (4), and therefore the flow monitoring automatic counting purpose is achieved. The detachable water conservation project small-flow seepage measuring device is simple and convenient to mount and use, solves the transformation problem of the measuring weir, and improves seepage monitoring automation degree.

Description

Detachable hydraulic small flow seepage measurement device

technical field

The utility model relates to a hydraulic safety monitoring device, which is a monitoring and measuring device for small flow seepage of hydraulic structures such as dam bodies.

Background technique

According to the "Technical Specifications for Safety Monitoring of Earth-rock Dams" (SL80-94), according to the size and collection conditions of the seepage flow, the methods selected for monitoring the seepage flow of hydraulic structures mainly include:

1. When the flow rate is less than 1L/s, the volumetric method should be used, that is, the seepage rate is calculated by the amount of water collected in the container within a certain period of time;

2. When the flow rate is between 1 and 300L/s, the water measuring weir method should be used. In short, it is to use the water level probe to measure the water level under various weir types to calculate the seepage amount;

3. When the flow rate is greater than 300L/s or the water measuring weir cannot be installed due to the limitation of the drop, the seepage water should be introduced into the drainage ditch, and the flow velocity method should be used.

(1) The leakage of underground powerhouses and barrage dams of hydropower stations is quite different in the initial stage of construction, initial storage period, and stable operation period. The leakage rate in the stable operation period decreases year by year. In the monitoring points of some hydraulic structures, the leakage during the stable operation period is even only 30% of the initial period. Therefore, there is a problem of transforming the weir method for measuring larger flows into the volumetric method for measuring smaller flows.

(2) The water weir method and the flow rate method can use many monitoring instruments and the technology is mature. However, the volumetric method requires a high degree of operator care when testing small flow rates. When different personnel perform the test, the accuracy of the readings is difficult. ensure. The traditional volumetric method requires manual collection, reading, and recording of data, which is highly dependent on labor and has a low level of automation.

Utility model content

The utility model aims at the problems of the above-mentioned prior art, and provides a detachable small-flow seepage monitoring and measuring device which is easy to use.

The utility model detachable hydraulic small flow seepage measurement device is composed of a detachable weir plate 1, a diversion tank 2, a measuring device housing 3, a water holding funnel 4, a tipping bucket flowmeter 5 and a pulse generation counter 6;

The detachable weir plate 1 is V-shaped, and its shape is consistent with the V-shaped water outlet groove a' on the water measuring weir a . The lower part of the detachable weir plate 1 is provided with a groove 10 and a sealing strip 11. The weir plate 1 can be detached when in use. The lower part of the bottom part is connected with the V-shaped water outlet groove a' on the water measuring weir a through the groove 10 and the sealing strip 11 without leakage, and the diversion water groove 2 is connected to the bottom end of the V-shaped mouth of the detachable weir plate 1 , The tipping bucket flowmeter 5 is installed in the measuring device housing 3, the water funnel 4 is installed on the top of the tipping bucket flow meter 5 in the measuring device housing 3, the diversion water tank 2 leads to the upper part of the water holding funnel 4, and is placed in the measuring device housing. The bottom of the body 3 corresponds to the left and right ends of the tipping bucket flowmeter 5 to set the pulse generation counter 6, and the bottom surface of the measuring device housing 3 is provided with adjustable feet 31, so that the measuring device housing 3 can be placed horizontally, so that The tipping bucket flowmeter 5 works smoothly and accurately.

The utility model guides the water passing through the original water weir a into the measuring device housing 3 through the detachable weir plate 1 and the diversion water tank 2, and injects the water into the tipping bucket flowmeter 5 through the water holding funnel 4, and the water of the tipping bucket flowmeter 5 Two equal-volume triangular chambers, when one chamber receives water, the other chamber is in a waiting state, when the volume of seepage water connected reaches a predetermined value, it will automatically overturn due to gravity and is in a waiting state, and the other chamber is in a working state for receiving water , the left and right buckets are always in the state of receiving water in rotation.

The pulse generation counter 6 is composed of magnetic steel and dry reed switch. The magnetic steel is installed on the side wall of the tipping bucket. When the tipping bucket turns over, it sweeps past the dry reed switch to make the dry reed switch produce on-off changes. Every time the tipping bucket turns Inverting the dry reed once will send out a pulse signal once it is switched on. Every time a pulse signal is generated, it represents a certain amount of water, realizing the purpose of automatic counting of flow monitoring. The CR10X data collector can be directly purchased to record the number of pulses per unit time.

The utility model can be used in conjunction with the existing water measuring weir a, is simple and convenient to install, solves the problem of reforming the water measuring weir, is convenient to use, and saves time and cost. Use tipping bucket flowmeters and automatic counters to collect flow data to improve the automation of seepage monitoring.

Description of drawings

Fig. 1 is a structural schematic diagram of an embodiment of the utility model.

Fig. 2 is a schematic diagram of the structure of the detachable weir plate 1 and its cooperation with the water measuring weir a.

Fig. 3 is a schematic view of the utility model in use.

Detailed ways

The utility model detachable hydraulic small flow seepage measurement device is composed of a detachable weir plate 1, a diversion tank 2, a measuring device housing 3, a water funnel 4, a tipping bucket flowmeter 5 and a pulse generation counter 6; detachable The weir plate 1 is V-shaped, and its shape is consistent with the V-shaped water outlet groove a' on the water measuring weir a . The lower part of the detachable weir plate 1 is provided with a groove 10 and a sealing strip 11. The lower part of the weir plate 1 can be detached when in use. Through the groove 10 and the sealing strip 11, it is connected with the V-shaped water outlet groove a' on the water measuring weir a without leakage, and the diversion water groove 2 is connected to the bottom end of the V-shaped mouth of the detachable weir plate 1 , and the tipping bucket type The flow meter 5 is installed in the measuring device housing 3, the water funnel 4 is installed on the top of the tipping bucket flow meter 5 in the measuring device housing 3, the diversion water tank 2 leads to the upper part of the water holding funnel 4, and the water holding funnel 4 is installed on the measuring device housing 3. A pulse generation counter 6 is arranged on the left and right ends corresponding to the tipping bucket flowmeter 5 on the bottom of the inside, and an adjustable leg 31 is arranged on the bottom surface of the measuring instrument housing 3 .

Claims (1)

1. detachable water conservancy project low discharge seepage flow measurement mechanism, is characterized in thatby detachable weir plate (1), diversion flume (2), measuring appliance housing (3), the funnel that is filled with water (4), tipping bucket meter (5) and pulse generation counter (6), formed; detachable weir plate (1) be V-arrangement, its shape andv-arrangement effluent trough on weir (a) (a ') consistent , detachable weir plate (1)bottom offers groove (10) and sealing strip (11), the V-shaped part bottom of detachable weir plate (1) is connected withdiversion flume (2), tipping bucket meter (5) is arranged in measuring appliance housing (3), the funnel (4) that is filled with water is arranged on the top of the interior tipping bucket meter of measuring appliance housing (3) (5), diversion flume (2) is guided the funnel that is filled with water (4) top into, on bottom in measuring appliance housing (3), the two ends, left and right of corresponding tipping bucket meter (5) arrange pulse generation counter (6), are provided with adjustable support leg (31) on the bottom surface of measuring appliance housing (3).

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