CSO/STORMWATER MANAGEMENT. HYDROVEX HHV-E Vortex Driven Regulator

Transcription

1 CSO/STORMWATER MANAGEMENT HYDROVEX HHV-E Vortex Driven Regulator

2 HYDROVEX HHV-E VORTEX DRIVEN REGULATOR APPLICATION The hydro electronic HYDROVEX HHV driven regulator, type E is specially designed for use in wastewater systems. It is adapted for use in small and medium size flows from 10 l/s to 200 l/s (0.35 cfs to 7.06 cfs). The combination between vortex flow regulators, pressure sensor, motorized valve and electronic controls offer new possibilities to the user. ADVANTAGES The HYDROVEX HHV-E is a well-designed device and is characterized by the following advantages: constant flows output quick reaction time of flow regulating circuit strong operating security based on the integration of a vortex flow regulator control of small flows simple and easy changes of flow robust stainless steel device modular construction of electrical components integrate fault detection Real Time Control and adjustment of functional flows possible connection to all types of SCADA and remote controls DESIGN AND OPERATION Figure 1 shows the principle of construction of the regulating circuit. Owing to the fact that the vortex regulator is a strong resistance to the flow, small flows also generate strong pressure signals. When the flow Q is lower than the set-flow rate, the pressure in the recorder is also lower than the rated pressure. The valve is therefore completely open. When the flow increases and exceeds the set-flow rate, for example, during a rainfall, the valve begins its closing operation. This operation continues as long as the flow exceeds the set-flow rate. As soon as the value falls below the flow rate, a process of closing the valve is started. The valve shovel can thus move at the set speed or remain at rest. The impulses - work and pause - are given only by pressure contact in the vortex chamber and not by a pre-registered sequence. If the valve is in regulating position and there is a partial blockage of the opening, the flow decreases. The regulating device recognizes this situation as a drop of pressure. The valve then opens until, in spite of a partial blockage, the set-flow rate is again reached, or the debris is pushed through the opening. In the latter case, the valve again changes operating direction, and the shovel returns to its regulating position. Figure 1: Principle and composition of the Hydrovex HHV-E Vortex Driven Regulator During this transition period, the Hydrovex HHV-E Vortex Driven Regulator prevents any important increase of flow. The regulation circuit by itself eliminates any defects on the control valve. This device can be installed in any type of controlled sewer run, storm basin or retention facility in order to control the flows. Based on experience, the minimum flow selected should not be lower than 10 l/s (0.35 cfs) to insure safe operation.

3 ELECTRONIC EQUIPMENT The heart of this installation is the programmable controller or PLC. It takes over all commands and monitoring functions in automatic mode. The algorithm command, in the form of an easily modifiable program, is stored in the unit s memory. The system remains flexible and has enough capacity to control other devices such as: pumps, rinsing tanks, mixers, etc. located at the same site. The complex control program operates rapidly and remains invisible to the observer. The individual parts of the program are linked in blocks and command separate "HARDWARE" modules in the electrical equipment box. All visualization and operator consoles are assembled in the main panel. The figure on the first page shows the open panel with the command modules and signaling. The complete installation diagram is represented on a synoptic plate. Luminescent diodes indicate each work position of the different components (see Figure 2). The panel is provided with future extension space. The program is built so the unit has an external link providing remote diagnostic capacity. CHOICE OF REGULATOR TYPE There are four HHV-E models available for selections based on four different vortex flow regulators in five nominal diameters. Table 1 indicates, for each regulator, minimum and maximum set points. Minimum & Maximum Set-point Rates in l/s (cfs) Type of DN 200 (8") DN 250 (10") DN 300 (12") DN 350 (14") DN 400 (16") regulator l/s (cfs) l/s (cfs) l/s (cfs) l/s (cfs) l/s (cfs) HE-KN ( ) ( ) ( ) ( ) ( ) HE-LN ( ) ( ) ( ) ( ) ( ) HE-KH ( ) ( ) ( ) ( ) ( ) HE-LH ( ) ( ) ( ) ( ) ( ) Table 3: Selection chart showing flows and diameters for different types of HHV-E regulators FLOW CHARACTERISTICS When the flow falls under the minimum set flow rate, the HYDROVEX HHV-E Vortex Driven Regulator operates without activating the regulating device. The flow set point, more or less indicated at the bottom of our flow curve, is obtained when the vortex unit passes from orifice flow to controlled vortex flow. However, this flow point passes very quickly. After the vortex activation, the control system is activated and the flow becomes constant (see Figure 3). FLOW REGULATION Like for a simple vortex flow regulator, the flow can be changed or adjusted simply by exchanging the outlet orifice. Also, there is still the possibility of modifying the flow behavior by modifying the point of operation in the pressure sensor. With a remote control access, the design flow can be set to zero or to a set flow rate.

4 Figure 2: Synoptic panel of the HYDROVEX HHV-E Vortex Driven Regulator ELECTRICAL POWER BOX Every installation requires a main control panel. Depending on the amount of equipment required in the panel, based on the retained options, the panel size can vary from job to job. We will define the size according to the application. Each panel is manufactured from parts in series, includes a frame, heating, lighting, light switch and electrical outlet. The control panel must be installed in the immediate proximity of the flow regulator location. INSTALLATION The regulator installation is performed in two stages. Initially, vortex flow regulator assembly is carried out with the appropriate valves and pipe fittings. Once the assembly is completed, the grouting and finishing concrete is installed. Only then the electrical control inlet is installed and electricians hook up the power. In a second phase, the control system panel is mounted close or in the electrical control inlet. The electrical motor starters, or servomotors, command and the pressure sensing devices are installed. The unit startup involves final adjustments, based on the validation of the flow curve. Figure 3: Dimensionless flow curves for the HYDROVEX HHV-E Vortex Driven Regulator MAINTENANCE We recommend that each installation be maintained regularly. For each installation, we require starting up the servomotors, lifting up the meters and noting all information on a control log. Any debris that the system cannot eliminate by itself must be manually removed from the site. For the vortex flow regulator, we require a periodic visual inspection.

5 Figure 4: HYDROVEX HHV-E in operation. The cover is open for inspection 1. Controlled flow wall thimble 2. By-pass wall thimble 3. Motorized control valve 4. Bypass valve 5. Vortex flow regulator 6. Vent pipe 7. Regulator supports 8. Evacuation culvert 9. Bypass pipe 10. Extension rod control valve 11. Extension rod - bypass valve 12. Inspection manhole 13. Inlet culvert 14. Ladder 15. Access trap 16. Power box 17. Power supply 18. Pressure meter Figure 5: Example of installation of a HYDROVEX HHV-E Vortex Driven Regulator SPECIFICATIONS HYDROVEX HHV-E Vortex Driven Regulator Vortex flow regulator used to adjust the downstream flow based on an electronic regulation and motorized valve mounted on non-moving parts, vortex regulator providing free passage of larger diameter. The unit is assembled in new or existing chamber by flanged supports. Materiel is 304 stainless steel body, with removable cover, vent for the vortex core, connection to pressure sensor, removable outlet orifice, base supports, assembly hardware. HYDROVEX HHV-E type HE-. Upstream head h b : mce Design flow Q b : L/s Dry weather flow Q tx : L/s Assembly / orientation: ( ) CW / ( ) CCW Inlet diameter: mm Maximum upstream head: 10 mce Device shipped ready to be assembled, adjusted to required flow, includes hydraulic dimensioning, technical data and instructions on assembly, operation and maintenance. Grout and finishing concrete to be applied by others once the regulator is installed. Head is measured from the floor of the manhole and the invert of the outlet pipe to install the regulator. John Meunier Inc. ISO 9001 : 2000 Head Office 4105 Sartelon Saint-Laurent (Quebec) Canada H4S 2B3 Tel.: Fax: cso@johnmeunier.com Ontario Office 2000 Argentia Road, Plaza 4, Unit 430 Mississauga (Ontario) Canada L5N 1W1 Tel.: Fax: ontario@johnmeunier.com USA Office 2209 Menlo Avenue Glenside, PA USA Tel.: Fax: asteele@johnmeunier.com Revised :