Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
  • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
  • B66B5/14—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions in case of excessive loads
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
  • B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
  • B66B9/04—Kinds or types of lifts in, or associated with, buildings or other structures actuated pneumatically or hydraulically

Definitions

• Embodiments of a present disclosure relates to a pneumatic vacuum elevator, and more particularly to an overload valve assembly for a pneumatic vacuum elevator.
• the pneumatic vacuum elevator uses air pressure to cause motion of the passenger cabin within a thoroughfare or tubular cylinder.
• the mechanism uses the air within the tubular cylinder as a working fluid. Brakes, motors, valves, electronic controls and other equipment work in tandem to ensure a safe and pleasant riding experience for each occupant therein.
• the load inside an elevator cabin (CAR) assembly must not exceed the permissible load limit, so that the elevator cabin (CAR) assembly may traverse safely inside the cylinder assembly of the elevator without any malfunction.
• load cells are being used to determine the real time weight of the elevator cabin (CAR) assembly.
• elevator provides alerts if pre-determined weight is crossed.
• detection may be incorrect due to malfunction of load cells.
• An effective mechanism would be to use an automatic and reliable overload detection system, whereby the system may give alert after judging maximum permissible limit of pay load in real time and halt the operation of pneumatic vacuum elevator to prevent any mishap.
• an overload valve assembly for a pneumatic vacuum elevator comprises an overload valve unit.
• the overload valve unit is housed in a head cylinder.
• the overload valve unit is connected to top of an elevator cabin (CAR) assembly.
• the overload valve unit is configured to function based on spring actuation mechanism and ensure the maximum permissible limit of pay load in the cabin assembly.
• the overload valve assembly is characterised by a fastening means.
• the fastening means is mechanically oriented in an inverted position and affixed over outer top surface of the elevator cabin (CAR) assembly.
• the overload valve assembly is also characterised by a pad with a centre hole. The pad is inserted into the fastening means. The pad is adapted to rest over lower end of the fastening means.
• the overload valve assembly is also characterised by an arresting plate with a centre hole.
• the arresting plate is inserted into the fastening means.
• the arresting plate is adapted to rest above the pad.
• the arresting plate and the pad are tightly held over lower end of the fastening means by a C-shaped clip.
• the overload valve assembly is also characterised by a disc plate with a centre hole.
• the disc plate is inserted into the fastening means and mechanically coupled to lower side of the head cylinder.
• the disc plate comprises extrusion around circumference of the disc plate at lower side, extrusion around the centre hole, and a plurality of holes for out flow of air.
• the overload valve assembly is also characterised by a bottom bush.
• the bottom bush is inserted into the fastening means and housed inside the extrusion at the centre hole of the disc plate.
• the bottom bush is adapted to act as an insulator by insulating the fastening means from the disc plate.
• the overload valve assembly is also characterised by a spring of pre-determined spring force. The spring is inserted into the fastening means and rests above the disc plate.
• the overload valve assembly is also characterised by a top bush bounded with a nut. The top bush enables fastening of the spring with the disc plate from top end of the fastening means.
• a pneumatic vacuum elevator ensuring a maximum permissible limit of pay load in elevator cabin (CAR) assembly.
• the pneumatic vacuum elevator includes an elevator cylinder which is adapted to house pneumatic vacuum elevator components.
• the pneumatic vacuum elevator components include a head cylinder mechanically affixed just below the ceiling of the top floor for housing an elevator cabin structural sealing unit, at least one motor and an overload valve assembly, where the overload valve assembly is configured to function based on spring actuation mechanism and ensure a maximum permissible limit of pay load in elevator cabin (CAR) assembly.
• the pneumatic vacuum elevator components also include an elevator cabin (CAR) assembly.
• the elevator cabin (CAR) assembly is positioned below the head cylinder and adapted for upward and downward movement through one or more floor levels.
• the pneumatic vacuum elevator components also include an intermediate cylinder assembly mechanically affixed in between each of the one or more floor levels.
• the intermediate cylinder assembly is adapted to provide requisite space for easy movement of the elevator cabin (CAR) assembly between each of the one or more floor levels.
• FIG. 1 is a schematic representation of a pneumatic vacuum elevator in accordance with an embodiment of the present disclosure
• FIG. 2 is a schematic representation of an overload valve assembly in conjunction with a pneumatic vacuum elevator in accordance with an embodiment of the present disclosure
• FIG. 3 (a) is a schematic representation of top view of the overload valve assembly (110) in accordance with an embodiment of the present disclosure
• FIG. 3 (b) is a schematic representation of isometric view of the overload valve assembly (110) in accordance with an embodiment of the present disclosure
• FIG. 3 (c) is a schematic representation of front view of the overload valve assembly (110) in accordance with an embodiment of the present disclosure
• FIG. 4 is an exploded view representation of the overload valve assembly in accordance with an embodiment of the present disclosure
• FIG. 5 is a sectional view representation of the overload valve assembly during cabin permissible load condition in accordance with an embodiment of the present disclosure
• FIG. 6 is a sectional view representation of the overload valve assembly during cabin overload condition in accordance with an embodiment of the present disclosure.
• Embodiments of the present disclosure relate to an overload valve assembly for a pneumatic vacuum elevator.
• the overload valve assembly for a pneumatic vacuum elevator comprises an overload valve unit.
• the overload valve unit is housed in a head cylinder.
• the overload valve unit is connected to top of an elevator cabin (CAR) assembly.
• the overload valve unit is configured to function based on spring actuation mechanism and ensure the maximum permissible limit of pay load in the cabin assembly.
• the overload valve assembly is characterised by a fastening means.
• the fastening means is mechanically oriented in an inverted position and affixed over outer top surface of the elevator cabin (CAR) assembly.
• the overload valve assembly is also characterised by a pad with a centre hole. The pad is inserted into the fastening means. The pad is adapted to rest over lower end of the fastening means.
• the overload valve assembly is also characterised by an arresting plate with a centre hole.
• the arresting plate is inserted into the fastening means.
• the arresting plate is adapted to rest above the pad.
• the arresting plate and the pad are tightly held over lower end of the fastening means by a C-shaped clip.
• the overload valve assembly is also characterised by a disc plate with a centre hole.
• the disc plate is inserted into the fastening means and mechanically coupled to lower side of the head cylinder.
• the disc plate comprises extrusion around circumference of the disc plate at lower side, extmsion around the centre hole, and a plurality of holes for out flow of air.
• the overload valve assembly is also characterised by a bottom bush.
• the bottom bush is inserted into the fastening means and housed inside the extmsion at the centre hole of the disc plate.
• the bottom bush is adapted to act as an insulator by insulating the fastening means from the disc plate.
• the overload valve assembly is also characterised by a spring of pre-determined spring force. The spring is inserted into the fastening means and rests above the disc plate.
• the overload valve assembly is also characterised by a top bush bounded with a nut. The top bush enables fastening of the spring with the disc plate from top end of the fastening means.
• FIG. 1 is a schematic representation of a pneumatic vacuum elevator (10) in accordance with an embodiment of the present disclosure.
• the machine “pneumatic elevators” utilize air pressure to lift the elevator cabin (50).
• a vacuum seal built into the ceiling enables lifting of the elevator cabin through the elevator cabin housing.
• the pneumatic vacuum elevator (10) comprises an elevator cylinder (60).
• the elevator cylinder (60) is adapted to house the pneumatic vacuum elevator (10) components.
• the pneumatic vacuum elevator (10) components comprises a head cylinder (30).
• the head cylinder (30) is mechanically affixed just below ceiling (40) of the top floor (90).
• the head cylinder (30) is adapted for housing the elevator cabin structural sealing unit (20), at least one motor and an overload valve assembly. Each of the at least one motor delivers necessary power for total functioning of the elevator during operation.
• the pneumatic vacuum elevator (10) components also comprises a cylindrical elevator cabin (CAR) (50) assembly.
• the cylindrical elevator cabin (CAR) (50) assembly is positioned below the head cylinder (30).
• the cylindrical elevator cabin (CAR) (50) assembly is adapted to provide an elevator housing for upward and downward movement through one or more floor levels (80 and 90).
• the pneumatic vacuum elevator (10) components also comprises an intermediate cylinder assembly (70).
• the intermediate cylinder assembly (70) is mechanically affixed in between each of the one or more floor levels (80 and 90).
• the intermediate cylinder assembly (70) is adapted to provide requisite space for easy movement of the cylindrical elevator cabin (CAR) (50) assembly between each of the one or more floor levels (80 and 90).
• FIG. 2 is a schematic representation of the overload valve assembly (110) in conjunction with a pneumatic vacuum elevator (100) in accordance with an embodiment of the present disclosure.
• the overload valve assembly (110) is housed in a head cylinder (30) (as shown in FIG. 1) and principally connected to the top of an elevator cabin (CAR) (50) assembly.
• all such pneumatic vacuum elevator (10) (as shown in FIG. 1) components are housed in elevator cylinder (60).
• the overload valve assembly (110) is housed just above the bottom surface (130) housing a motor assembly (120).
• the overload valve assembly (110) is affixed near top portion (140) of elevator cylinder (60) to detect the weight of the elevator cabin (CAR) (50) assembly effectively.
• FIG. 3 (a) is a schematic representation of top view of the overload valve assembly (110) in accordance with an embodiment of the present disclosure.
• FIG. 3 (b) is a schematic representation of isometric view of the overload valve assembly (110) in accordance with an embodiment of the present disclosure.
• FIG. 3 (c) is a schematic representation of front view of the overload valve assembly (110) in accordance with an embodiment of the present disclosure.
• FIGs. 3(a), (b) and (c) basically provides assembled orthographic views of the overload valve assembly (110).
• the overload valve assembly (110) basically comprises of components such as a fastening means, a pad, an arresting plate, a disc plate fabricated with extrusions, a spring, a number of bush and a nut characterised for tightly holding the components together.
• the fastening means used may be a rod, a bolt, an Allen bolt, a stud bolt or a screw.
• FIG. 4 is an exploded view representation of arrangement of various components of the overload valve assembly (110) in accordance with an embodiment of the present disclosure.
• the overload valve assembly (110) for the pneumatic vacuum elevator (10) comprises an overload valve unit (105) (as shown in FIG. 2).
• the overload valve unit (105) is housed in a head cylinder (30) and connected to top of an elevator cabin (CAR) (50) assembly.
• the overload valve unit (105) is configured to function based on spring actuation mechanism and ensure the maximum permissible limit of pay load in the elevator cabin (CAR) (50) assembly.
• the overload valve assembly (110) is characterised by a fastening means (150).
• the fastening means (150) is mechanically oriented in an inverted position.
• the type of fastening means used may be a hexagonal fastening means (150).
• the fastening means (150) is affixed over outer top surface of the elevator cabin (CAR) (50) assembly.
• the overload valve assembly (110) is also characterised by a pad (160).
• the pad (160) is configured with a centre hole for the procedure of insertion into the fastening means (150).
• the pad (160) is adapted to rest over lower end of the fastening means (150).
• the pad is fabricated with nylon, plastic, polycarbonate, medium-density fibreboard or any non-conduction material. It is pertinent to note that, the use of non-conducting material enables insulation from unnecessary electrical conductivity.
• the pad (160) may be fabricated in circular shape.
• the overload valve assembly (110) is also characterised by an arresting plate (170).
• the arresting plate (170) is characterised with a centre hole for the procedure of insertion into the fastening means (150).
• the arresting plate (170) is adapted to rest above the pad (160).
• the arresting plate (170) is fabricated with steel, aluminium or any other similar conducting material.
• the arresting plate (170) may be fabricated in circular shape.
• the arresting plate (170) and the pad (160) are tightly held over lower end of the fastening means (150) by a C-shaped clip (180).
• the C-shaped clip (180) basically locks the arresting plate (170) and the pad (160) with the fastening means (150).
• the overload valve assembly (110) is also characterised by a disc plate (190).
• the disc plate (190) is characterised with a centre hole for the procedure of insertion into the fastening means (150).
• the disc plate (190) is mechanically coupled to lower side of the head cylinder (30).
• the disc plate (190) comprises extrusion around circumference of the disc plate (190) at lower side, extmsion around the centre hole, and a plurality of holes (195).
• the plurality of holes (195) may enable outflow of air during overload valve assembly (110) operation.
• the disc plate (190) is fabricated with steel, aluminium or any other similar conducting material.
• the extmsion around the centre hole is fabricated in upward direction. In such embodiment, the extmsion around the centre hole enable holding of components on the above portion of the overload valve assembly (110).
• the extmsion at lower side is fabricated in downward direction. In such embodiment, the extmsion at lower side is adapted to house the arresting plate (170) and the pad (160).
• the arresting plate (170) and the pad (160) is adapted to move in tandem from a closed position to an open position. At the closed position, the arresting plate (170) covers the plurality of holes (195), thereby preventing the out flow of air and completing a power circuit.
• the arresting plate (170) is configured to be pushed down to move to the open position, thereby uncovering the plurality of holes (195) and enabling the out flow of air and disconnecting the power circuit.
• the overload valve assembly (110) is also characterised by a bottom bush (200). The bottom bush (200) is inserted into the fastening means (150) and housed inside the extmsion at the centre hole of the disc plate (190).
• the bottom bush (200) is adapted to act as an insulator by insulating the fastening means (150) from the disc plate (190).
• the bottom bush (200) may be fabricated in circular shape.
• the bottom bush (200) is fabricated with nylon, plastic, polycarbonate, medium-density fibreboard and any non-conduction material.
• the overload valve assembly (110) is also characterised by a spring (210) of pre-determined spring force.
• the spring (210) is inserted into the fastening means (150) and rests above the disc plate (190).
• spring force is the force exerted by a compressed or stretched spring upon any object that is attached to it.
• the spring (210) is adapted to provide spring actuation movement for the movement of the arresting plate (170) and the pad (160) from the closed position to the open position upon detecting a load in the elevator cabin (CAR) (50) assembly more than the permissible limit of pay load.
• the arresting plate (170) and the pad (160) are pulled down via the fastening means when one or more users of permissible weight enters into the CAR, however the arresting plate (170) remains closely affixed onto the bottom of the disc plate (190) while covering the plurality of holes (195). This happens because the pre determined spring force of the spring is calibrated hold to the permissible weight.
• the spring gets back to its decompressed state, thus pulling up the arresting plate (170) onto the bottom of the disc plate (190) and thereby closing the plurality of holes (195) and completing the power circuit again.
• the overload valve assembly (110) is also characterised by a top bush (220) bounded with a nut (230). Such stmctural arrangement enables fastening of the spring (210) with the disc plate (190) from top end of the fastening means (150).
• a control panel is positioned above the top end of the hexagonal fastening means (150).
• the overload valve assembly (110) may use NyLok nut for tightening.
• the top bush (200) may be fabricated in circular shape to act as a non-conduction device.
• the top bush (220) is fabricated with nylon, plastic, polycarbonate, medium-density fibre board and any non-conduction material.
• the overload valve assembly (150) also comprises an electrical circuit (270) (as shown in FIG. 5 & FIG. 6) between an overload relay (250) present in the control panel and a positive terminal (260) housed within the control panel via the fastening means (150) and the disc plate (190).
• the fastening means (150) and the disc plate enable (190) completion of circuit and working of the overload valve assembly (110).
• Negative terminal is basically the overload relay (250) present in the control panel.
• FIG. 5 is a sectional view representation of the overload valve assembly (110) during cabin permissible load condition in accordance with an embodiment of the present disclosure.
• the electric motor mns normally to move the elevator cabin (CAR) (50) assembly within the cylinder assembly (30).
• the arresting plate (170) is touched into the disc plate (190) along with pad (160), without any spring (210) action. It is noted here that, the air is not allowed to flow outside from inner surface of the cylinder assembly (30).
• the above mechanism enables the elevator cabin (CAR) (50) assembly movement within the cylinder assembly (30) without the loss in flow of air pressure.
• FIG. 6 is a sectional view representation of the overload valve assembly (110) during cabin overload condition in correspondence of cabin moving in accordance with an embodiment of the present disclosure.
• the overload valve assembly (110) reacts through spring (210) tension due to insufficient air pressure on the top seal of the elevator cabin (CAR) (50) assembly.
• overload condition refers to a situation where the permissible limit exceeds the loading capacity of the elevator cabin (CAR) (50) assembly.
• the arresting plate (170) is moved from the disc plate (190) along with pad (160). Due to such movement, continuity of power is disconnected. Further, the air flow is allowed outside from the inner surface of the cylinder assembly (30). The direction of arrows in FIG.6 denotes the direction of flow of air.
• Such total mechanism stops the elevator cabin (CAR) (50) assembly within the cylinder assembly (30).
• an overload indicator such as LED is used to indicate the overload condition inside the elevator cabin (CAR) (50) assembly.
• an overload valve assembly provides an automatic over weight detection system for an elevator cabin (CAR) assembly.
• the disclosed system by help of a spring actuation device and electric signal ensures the maximum permissible limit of pay load in the elevator cabin (CAR) assembly. While specific language has been used to describe the disclosure, any limitations arising on account of the same are not intended. As would be apparent to a person skilled in the art, various working modifications may be made to the method in order to implement the inventive concept as taught herein.

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• Engineering & Computer Science (AREA)
• Automation & Control Theory (AREA)
• Structural Engineering (AREA)
• Cage And Drive Apparatuses For Elevators (AREA)

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• 2020
  • 2020-06-02 IN IN202041023093A patent/IN202041023093A/en unknown
• 2021
  • 2021-05-31 CA CA3181115A patent/CA3181115A1/en active Pending
  • 2021-05-31 US US17/928,631 patent/US11845633B2/en active Active
  • 2021-05-31 WO PCT/IB2021/054766 patent/WO2021245537A1/en not_active Ceased

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