SU1134519A1 - Air blower plant for pneumatic elevator - Google Patents

Abstract

AIR Blowing system of pneumatic lift, containing a fan with outlet damper and receiver connected to the working cavity of the pneumatic lift, connected with each other by means of an alarm circuit, which is equipped with a compressor to improve performance by reducing air consumption and simplifying the design. communicated with a receiver, an ejector including an active nozzle and a displacement chamber, a pipeline having a sensor, a pressure regulator and a shut-off valve, and a rotary spring-loaded a flap mounted in the working cavity of the pneumatic lifter, wherein the input of the displacement chamber is in communication with the atmosphere, and the output is connected to the working cavity, with said sensor, regulator and pipeline valve connected to the fan flap of said signaling circuit.

Description

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FIELD OF THE INVENTION The invention relates to hoisting and transport machinery, in particular, to designs of pneumatic lift systems.

A pneumatic elevator airbag system is known, comprising a fan connected to the pneumatic elevator working cavity with an outlet flap and a receiver interconnected via an alarm circuit 1.

However, the known airbag system cannot be effectively used in pneumatic lifters, since they are characterized by a high pressure requirement during acceleration compared to the working pressure during steady-state movement of the pneumatic lift platform. This necessitates the setting up of a high-power blower system, which is underused in established operating modes. In addition, a receiver having a working pressure equal to the maximum pressure of the fan (since the latter is connected to it directly) cannot create a significant supply of energy to compensate for the increase in the volume of the working cavity during the accelerated movement of the platform, since the pressure difference is negligible. All this together leads to a deterioration in the performance of the blower system due to unproductive air losses coming from the fan, as well as to the complexity of its design.

The purpose of the invention is to improve performance by reducing air flow and simplifying the design of the pneumatic lift air system.

The goal is achieved by the fact that the pneumatic airblower system, containing a fan connected to the pneumatic elevator working cavity with an outlet flap and a receiver connected to each other using an alarm circuit, is equipped with a compressor in communication with the receiver, an ejector including an active nozzle and a chamber displacement, a pipeline having a sensor, a pressure regulator and a shut-off valve, and a rotary spring-loaded damper mounted in the working cavity of the pneumatic lift, while the input of the displacement chamber is the outlet is connected to the working cavity, with said sensor, regulator and valve of the pipeline connected to the fan flap of the indicated signaling circuit.

FIG. Figure 1 shows the layout of the blower system; in fig. 2 - construction of the blower system.

The pneumatic airblower system contains a fan 1 connected by an air duct 2 having a valve 3 with a working cavity 4, a receiver 5 to which compressor 6 is connected, an ejector 7, the active nozzle 8 of which is connected via pipeline 9 by a shut-off valve 10, a pressure regulator 11 and pressure sensor 12 to receiver 5.

The mixing chamber 13 of the ejector 7 is brought into the working cavity 4 of the pneumatic lift next to the air duct 2 so that the spring-loaded gate 14 communicates with the mixing chamber 13 or the air duct 2. Fan 1, gate 3, valve 10, controller 11 and sensor 12 are connected between an alarm chain 15.

The blower system operates as follows.

Fan 1 is initially off and flap 3 is closed. From the moment the pneumatic lift starts using, the compressor 6 pumps air into the receiver 5. When the lift command is given, the valve 10 and the regulator 11 open. Air flows through line 9 to the nozzle 8 of the ejector 7, exhausts into the mixing chamber 13, and additionally draws air from the atmosphere and enters the cavity 4, deflecting the flap 14. The pressure regulator 11 provides a constant air pressure in the pipe 9 and the nozzle 8, corresponding to the design pressure for the ejector 7. Due to this, the platform lifts the air lift . When pressure in pipeline 9 drops below design, sensor 12 sends a signal through circuit 15 to close valve 10 and regulator I, open valve 3 and turn on fan 1. At this point, the pneumatic lift platform is at some intermediate height. Further lifting of the platform takes place by supplying air through the air duct 2 from the fan 1, and the receiver 5 is filled with pressurized air from the compressor 6.

In the case when the system parameters correspond to the calculated ones (load, time interval between the lifts, etc.), the platform is lifted without turning on the fan 1.

Improving the performance of the blower system is achieved by more efficient use of compressed air energy when it is accumulated in the receiver under high pressure. In this case, the accumulation of energy during successive cycles of operation occurs during the platform unloading time at the top, lowering and loading at the bottom.

Claims (1)

AIR LIFTING SYSTEM, containing a fan connected to the working cavity of the air-lift system with an outlet shutter and a receiver connected to each other by means of an alarm circuit, characterized in that, in order to improve operational characteristics by reducing air consumption and simplifying the design, it is equipped with a compressor, in communication with the receiver, an ejector including an active nozzle and a mixing chamber, a pipeline having a sensor, a pressure regulator and a shut-off valve, and a rotary spring-loaded shutter nkoya people mounted in the working cavity pneumolift, wherein the mixing chamber inlet communicates with the atmosphere, and an output - with a working chamber, wherein said sensor controller and the valve pipe are connected with said circuit fan shutter signaling. with SI with