FIELD OF INVENTION
The invention relates to a controlled discharge flapper valve. This valve is used FOR CONTROL DISCHARGE OF WASTE FROM RETENTION TANK in conjunction with "Controlled Discharge Toilet System" for railway passenger coaches and road vehicles.
PRIOR ART
The existing railway coaches are provided with direct fall toilet system wherein the human waste falls on the ground immediately upon being released, with the help of flushing water in the toilet pan.
The presence of human waste on the railway stations is undesirable.
To solve the above said problems, a system is required to be developed so as to keep the railway stations neat and clean. The system is "Controlled Discharge Toilet System" (CDTS) to keep the railway stations clear of the human waste.
It works on the principle of storing the human waste in a retention tank provided below the railway coach and discharging the contents on attaining predetermined speed or on sensing a set of predetermined coordinates, so that, the waste is discharged outside the station premises/nominated location.
The Controlled Discharge Toilet System is provided with at least two valves; one at the inlet of the retention tank and the other at the outlet of the retention tank. The inlet valve works on the principle of rotary movement of flapper with the help of an air cylinder, simultaneously
permitting a valve disc to rotate. Thus, it permits the waste to enter the retention tank. Once the waste is transferred to retention tank, the disc comes back to its original position.
The retention tank holds the waste till the discharge flapper valve opens to discharge at a particular location. For this purpose, the retention tank is required to be provided with controlled discharge flapper valve which works on the principal of opening by rotating the flapper at predetermined angle/time by controlled actuator. Thus, it permits discharge of waste/emptying or content from retention tank at predetermined location and after discharge the flapper returns to closing position.
OBJECTS OF THE INVENTION
The primary object of the present invention is to provide a control discharge flapper valve which is simple in construction.
Another object of the present invention is to provide a controlled discharge flapper valve which does not allows discharge of waste at specified locations /usage
Further object of the present invention is to provide a controlled discharge flapper valve which is effective.
STATEMENT OF INVENTION
According to this invention, there is provided a controlled discharge flapper valve comprising of a body accommodating flapper and shaft in connection with an actuator inside protection box to avoid any damage wherein the shaft is in connection with the flapper.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Further objects and advantages of this invention will be more apparent from the ensuing description when read in conjunction with the accompanying drawings and wherein:
Fig. 1 shows: Flapper valve assembly of the present invention. Fig.2 shows: Sectional view of Controlled discharge flapper valve Fig.3 shows: Schematic sketch of Controlled Discharge Toilet
System(CDTS) Fig 4 shows: Isometric view of the discharge valve
DETAILED DESCRIPTION OF THE INVENTION WITH REFERENCE TO THE ACCOMPANYING DRAWINGS
Reference may be made to fig. 1 8B 2, wherein the controlled discharge flapper valve comprises of a body (1). The body accommodates flapper (2) and shaft (3). Said body is attached to an actuator (4) in a protection box (5) to avoid any damage. The actuator is connected to said shaft, which is in connection with the flapper for its operation. Said actuator becomes operational by means of a control panel for opening and closing of discharge flapper valve. The flapper body is provided with a chute (6), so that the waste is directly discharged without splashing.
The actuator is in communication with compressed air source through which air is supplied for opening and closure of said flapper. The actuator valve rotates the flapper on receipt of compressed air for opening/closing of valve to discharge/retain waste.
In addition to the above, the actuator is provided with a means for opening/closing of flapper in case, there is no air in the reservoir.
Further, a seal (7) is provided at the mouth of the body and flapper is pressed against the seal to avoid any leakage from the retention tank.
OPERATION OF THE PRESENT INVENTION
In normal working system, the discharge flapper valve remains in closed position so that there is no slippage of waste from retention tank and waste is collected in the retention tank. As soon as a pre specified number of flush counts are recorded and the vehicle reaches a minimum specified speed /upon sensing the co-ordinates, control panel opens the spool valve which supplies air pressure to the actuator and the actuator rotates the flapper and opens the passage for drop of waste at pre determined location. The flapper closes as soon as predetermined time has elapsed.
When air and power in the system is available, the discharge valve operates when both the following parameters are satisfied.
1 A predetermined number of flush counts have been recorded 85
2 Train/ Vehicle has attained pre-specified speed or senses the coordinates
The logistics of working (opening/closing) of control discharge flapper valve can be adjusted/altered for pre-specified speed/location/no of flushes with the help of control system.
In case there is no air pressure/ power in the system, the flapper valve can be kept in open/close position as needed for application. The control panel can be programmed accordingly
It is to be noted that the present invention is susceptible to modifications, adaptations and changes by those skilled in the art. Such variant embodiments employing the concepts and features of this invention are intended to be within the scope of the present invention, which is further set forth under the following claims:-

WE CLAIM;
1. A controlled discharge flapper valve comprising of a body accommodating flapper and shaft in connection with an actuator inside protection box to avoid any damage wherein the shaft is in connection with the flapper.
2. A controlled discharge flapper valve as claimed in claim 1, wherein said flapper body is provided with a chute for direct discharge of waste without splashing.
3. A controlled discharge flapper valve as claimed in claim 1 or 2, wherein said actuator is in connection with a control system for opening and closing of the discharge flapper valve.
4. A controlled discharge flapper valve as claimed in any of the preceding claims, wherein said actuator is provided with a means for operation of the flapper in case there is no air in the reservoir.
5. A controlled discharge flapper valve as claimed in any of the preceding claims, wherein said body is provided with a seal at its mouth.
6. A controlled discharge flapper valve substantially as herein described with reference to the accompanying drawings.