CN2695479Y

CN2695479Y - Equipment for measuring water quantity for irrigating agricultural field

Info

Publication number: CN2695479Y
Application number: CN 200320113332
Authority: CN
Inventors: 贾树宝
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-12-02
Filing date: 2003-12-02
Publication date: 2005-04-27
Anticipated expiration: 2013-12-02

Abstract

The utility model discloses equipment for measuring water quantity for irrigating agricultural field, comprising an irrigation channel and a measuring weir on the channel bed. The utility model is characterized in that the measuring weir is in the shape of a sawtooth, and an observation well communicated with the lower part of the channel slot is provided out of the channel dyke in the upper course of the measuring weir. The utility model has the advantages of small weir passing head loss, broad measuring range and high precision.

Description

A kind of equipment of measuring the farmland irrigation water amount

Technical field:

The utility model relates to a kind of technology of measuring the water yield, particularly a kind of equipment of measuring the farmland irrigation water amount.

Background technology:

China is the deficient general country of water resource, and using water wisely is the important measures of country, is the basic outlet of agriculture irrigation water saving by water yield valuation.Existing broad-crested measuring weir, its mill weir are for to be vertical yi word pattern weir with current, thereby there was the shortcoming that the loss of sluice head is big, measurement category is little in this weir.

Summary of the invention:

The utility model technical issues that need to address are to design a kind of equipment that the sluice head loses little and the measurement farmland irrigation water amount that measurement category is big of crossing.The technical solution of the utility model is, a kind of equipment of measuring the farmland irrigation water amount, and it comprises the weir on irrigation canal and the canal bed, it is characterized in that: weir is a sawtooth pattern.Canal dike peripheral hardware one observation well is communicated with the bottom of gool in the weir upstream.The weir that the utility model adopted is the sawtooth pattern structure, thereby has the sluice head compared with the prior art and lose the big advantage of little measurement category.

Description of drawings:

Fig. 1 is a vertical view of the present utility model, and Fig. 2 is the A-A sectional view of Fig. 1, and Fig. 3 is the B-B sectional drawing of Fig. 1, among the figure: 1. water channel dike 2. weirs 3. weir base plates 4. observation wells 5. canal beds.

The specific embodiment:

Weir 2 of the present utility model connects into a sawtooth pattern by four straightways, and this sawtooth pattern weir is on the weir base plate of building on the canal bed 53, and the two ends of sawtooth pattern weir are connected with canal dike 1.Do not influence for the dark numerical value of the channel water of measuring is not subjected to water level fluctuation, guarantee its precision, build an observation well 4 outside the dike above weir, have a transverse pipe that observation well is communicated with gool water between well and the gool, the water level of observation well is the water level in the canal.The water yield that this measureing equipment is surveyed is tried to achieve by flow and the product of water time of crossing the weir, and mistake weir flow amount is tried to achieve by discharge coefficient, the wide B in weir, weir head H, and discharge coefficient and head H, weir flute profile line length of run are relevant, can obtain by tabling look-up.The utility model has been owing to adopted sawtooth pattern to cross mill weir, and its length of run is greater than existing yi word pattern weir, thereby has little certainty of measurement height of head loss and the big advantage of measurement category.

Claims

1. equipment of measuring the farmland irrigation water amount, it comprises the weir on irrigation canal and the canal bed, it is characterized in that: weir is a sawtooth pattern.

2. a kind of equipment of measuring the farmland irrigation water amount according to claim 1 is characterized in that: canal dike peripheral hardware one observation well is communicated with the bottom of gool in the weir upstream.