Integrated flat gate for open channel measurement and control

Abstract

The present invention discloses a measurement and control integrated flat gate for an open channel, comprising a gate slot pre-buried at corresponding positions on both side walls of the channel, a bottom sill pre-buried in the bottom plate of the channel and located between the two gate slots, as well as a gate frame, a gate plate, a flow measuring device and an opening and closing device; the gate frame is composed of a left and right vertical frame, a bottom horizontal frame and a top horizontal frame, and a slide groove is provided on the inner side of the left and right vertical frames, and the gate plate is slidably inserted in the slide groove of the gate frame, and the left and right vertical frames of the gate frame are inserted in the corresponding gate slot; the opening and closing device is a driving motor arranged on the top horizontal frame of the gate frame, and the driving motor power shaft is connected to the nut arranged on the top of the gate plate through a reducer and a lead screw; there are four flow measuring devices, which are respectively arranged on the upstream and downstream sides of the gate slots on both side walls of the channel. The advantage of the present invention is that the gate frame can be pulled out from the gate slot embedded parts, and it is easy to install and overhaul. The average flow of the monitored section is determined by energy conservation and channel continuity equation, and parameter calibration is not required, and the measurement accuracy is high.

Description

Technical Field

[0001] The invention relates to flow measurement and control of an open water channel of a hydraulic structure, and in particular to a measurement and control integrated flat gate used for an open channel. Background Art

[0002] Accurate monitoring of flow in open channels is the basis for water conservation in irrigation areas, as well as for refined management of water resources and optimized channel scheduling, especially for flow monitoring of gate valves in open channels. At present, integrated gates for measurement and control used in water diversion and irrigation projects mostly use a time difference flow measurement box connected in front of the gate, which is mostly used in water diversion outlets with breast walls, and the orifice size is mostly 0.4×0.4m~1.5×1.5m, which is not suitable for wide and short open channels, and is not easy to install and maintain, and has a high cost. Another form is the downward flap gate, which calculates the flow through the gate by measuring the water level before and after the gate, but the measurement accuracy is greatly affected by the flow state after the gate, which is also not easy to install and maintain, and has a high cost. Summary of the invention

[0003] The object of the present invention is to provide a flat gate with integrated measurement and control for an open channel, which is easy to install and maintain and is not limited by the size of the orifice.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] The integrated flat gate for measurement and control of an open channel described in the present invention comprises a gate groove pre-buried at corresponding positions on both side walls of the channel, a bottom sill pre-buried in the bottom plate of the channel and located between the two gate grooves, as well as a gate frame, a gate plate, a flow measuring device and an opening and closing device; the gate frame is composed of a left and a right vertical frame, a bottom horizontal frame and a top horizontal frame, and the inner side surfaces of the left and right vertical frames are provided with sliding grooves, and the gate plate is slidably inserted in the sliding grooves of the gate frame, and is sealed and fitted with the gate frame through rubber water stops arranged on the left and right sides and the bottom surface of the gate plate; the left and right vertical frames of the gate frame are inserted in the corresponding gate grooves, and are sealed and fitted with the gate groove and the bottom sill through rubber water stops arranged on the left and right vertical frames and the bottom horizontal frame of the gate frame; the opening and closing device is a driving motor arranged on the top horizontal frame of the gate frame, and the power shaft of the driving motor is connected to the nut arranged on the top of the gate plate through a reducer and a lead screw; there are four flow measuring devices, which are respectively arranged on the upstream and downstream sides of the gate grooves on both side walls of the channel.

[0006] Each of the flow measuring devices has the same structure, including a vertical cylinder with a right-angled triangle cross-section, wherein the two right-angled cylinder surfaces of the vertical cylinder are used to connect with the vertical frame of the gate frame, and the hypotenuse cylinder surface of the vertical cylinder is the water-facing surface and is evenly provided with a plurality of vertical filtering holes for eliminating water flow disturbances; a vertical pipe is arranged in the vertical cylinder, and vertical filtering holes for eliminating water flow disturbances are evenly provided on the circumferential surface of the vertical pipe; a pressure water level monitor is arranged in the vertical pipe on the base of the vertical cylinder, and the control interface of the pressure water level monitor is connected to a flow monitoring controller by leading out from the upper tube mouth conduit of the vertical cylinder through a cable.

[0007] A notch is provided on the bottom pipe wall of the vertical pipe so that canal water can smoothly enter the vertical pipe.

[0008] The invention has the advantage that the gate frame can be pulled out from the gate slot embedded parts, which is convenient for installation and maintenance. At the same time, the average flow of the monitored section is calculated through the energy conservation and channel continuity equation, eliminating the error caused by the energy conversion of the transducer device in the traditional flow measurement method, and no parameter calibration is required, with high measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the present invention.

[0010] Figure 2 yes Figure 1 AA section view enlarged structural diagram.

[0011] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure of part I.

[0012] Figure 4 It is a structural schematic diagram of the flow measuring device of the present invention.

[0013] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure of the BB section. DETAILED DESCRIPTION

[0014] The following is a detailed description of an embodiment of the present invention in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiment.

[0015] The integrated flat gate for open channel measurement and control described in the present invention comprises gate slots 2 embedded in the corresponding positions of the left and right side walls 1.1 and 1.2 of the channel, a bottom sill embedded in the channel bottom plate between the two gate slots 2, as well as a gate frame, a gate plate, a flow measuring device and an opening and closing device.

[0016] The gate frame is composed of left and right vertical frames 3.1, 3.2, a bottom horizontal frame 3.3 and a top horizontal frame 3.4. The inner sides of the left and right vertical frames 3.1, 3.2 are respectively provided with slide grooves 3.5. The gate plate 4.1 is slidably inserted into the slide grooves 3.5 of the gate frame, and is sealed and fitted with the gate frame through the rubber water stop 4.2 arranged on the left and right sides and bottom surface of the gate plate 4.1; the left and right vertical frames 3.1, 3.2 of the gate frame are inserted into the corresponding gate grooves 2, and are sealed and fitted with the gate grooves 2 and the bottom sill through the rubber water stop 3.6 arranged on the left and right vertical frames 3.1, 3.2 and the bottom horizontal frame 3.3.

[0017] The opening and closing device is a driving motor 5 arranged on the top horizontal frame 3.4 of the gate frame. The driving motor power shaft is connected to the nut 8 arranged on the top of the gate plate 4.1 through a reducer 6 and a screw 7. There are four flow measuring devices 9, which are respectively arranged on the upstream and downstream sides of the gate slot 2 on the left and right side walls of the channel.

[0018] like Figure 4 , 5 As shown, each flow measuring device 9 has the same structure, including a vertical cylinder with a right-angled triangle cross section, two right-angled side cylinder surfaces 9.1 and 9.2 of the vertical cylinder are used to connect with the vertical frame of the gate frame, and the hypotenuse cylinder surface 9.3 of the vertical cylinder is the water-facing surface and is evenly provided with a plurality of filter vertical holes 9.4 for eliminating water flow disturbance; a vertical pipe 10 is arranged in the vertical cylinder, and filter vertical holes 10.1 for eliminating water flow disturbance are evenly provided on the circumference of the vertical pipe, and a notch 10.2 is provided on the bottom pipe wall of the vertical pipe 10, so that the canal water can smoothly enter the vertical pipe 10.

[0019] A pressure water level monitor 11 is arranged in the standpipe 10 on the base 9.5 of the standpipe, and a control interface of the pressure water level monitor 11 is connected to a flow monitoring controller through a cable led out from the upper tube port conduit 9.6 of the standpipe.

[0020] The lateral flow principle of the present invention is briefly described as follows;

[0021] A pair of flow measuring devices 9 located at the upstream side of the gate slot 2 is used to monitor the flow of the flow in a set monitoring period Δ t The water level of the monitoring section Ls on the upstream side of the channel is collected according to the set collection frequency and sent to the flow monitoring controller; a pair of flow measuring devices 9 located on the downstream side of the gate slot 2 is used to collect the water level of the monitoring section Ls on the upstream side of the channel at the set monitoring period Δ t The water level of the monitoring section Lx on the downstream side of the channel is collected according to the set collection frequency and sent to the flow monitoring controller.

[0022] The flow monitoring controller calculates the set monitoring period Δ t The average water level hs data of the monitoring section Ls on the upstream side and the average water level hx data of the monitoring section Lx on the downstream side are used to calculate the flow rate through the gate based on the energy conservation principle of the three sections.

Claims

1. A measurement and control integrated flat gate for an open channel, comprising gate slots pre-buried at corresponding positions on both side walls of the channel, a bottom sill pre-buried in the channel bottom plate between the two gate slots, a gate frame, a gate plate, a flow measuring device and an opening and closing device; characterized in that: The gate frame is composed of left and right vertical frames, a bottom horizontal frame and a top horizontal frame. The inner sides of the left and right vertical frames are provided with sliding grooves. The gate plate is slidably inserted in the sliding grooves of the gate frame and is sealed and fitted with the gate frame through rubber water stops arranged on the left and right sides and bottom surface of the gate plate; the left and right vertical frames of the gate frame are inserted in the corresponding gate grooves and are sealed and fitted with the gate grooves and the bottom sill through rubber water stops arranged on the left and right vertical frames and the bottom horizontal frame of the gate frame; the opening and closing device is a driving motor arranged on the top horizontal frame of the gate frame, and the power shaft of the driving motor is transmission-connected to the nut arranged on the top of the gate plate through a reducer and a screw; there are four flow measuring devices, which are respectively arranged on the upstream and downstream sides of the gate grooves on both side walls of the channel.

2. The integrated flat gate for measuring and controlling an open channel according to claim 1, characterized in that: Each of the flow measuring devices has the same structure, including a vertical cylinder with a right-angled triangle cross-section, wherein the two right-angled cylinder surfaces of the vertical cylinder are used to connect with the vertical frame of the gate frame, and the hypotenuse cylinder surface of the vertical cylinder is the water-facing surface and is evenly provided with a plurality of vertical filtering holes for eliminating water flow disturbances; a vertical pipe is arranged in the vertical cylinder, and vertical filtering holes for eliminating water flow disturbances are evenly provided on the circumferential surface of the vertical pipe; a pressure water level monitor is arranged in the vertical pipe on the base of the vertical cylinder, and the control interface of the pressure water level monitor is connected to a flow monitoring controller by leading out from the upper tube mouth conduit of the vertical cylinder through a cable.

3. The integrated flat gate for measuring and controlling an open channel according to claim 2, characterized in that: A notch is provided on the bottom pipe wall of the vertical pipe so that canal water can smoothly enter the vertical pipe.

Images