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Pile-up valve for frequency conversion hydraulic elevator

A technology that integrates valves and elevators. It is applied in the direction of fluid pressure actuators, elevators, and servo motor components. It can solve the problems of slow oil circuit cut-off speed, large oil circuit impact, and affecting comfort, so as to enhance comfort and reduce The effect of oil circuit impact and simple appearance

Inactive Publication Date: 2006-08-23
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] In the past, there was a hydraulic system built with independent hydraulic valves to meet the functions required by the hydraulic control part of the frequency conversion hydraulic elevator. It can basically meet the working needs of the frequency conversion hydraulic elevator up and down, but its appearance lacks simplicity and integrity. The cut-off speed of the oil circuit is relatively slow when going down, and the impact of the oil circuit is large, which affects the comfort. In the event of a power failure or failure, the elevator cannot stop quickly

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  • Pile-up valve for frequency conversion hydraulic elevator

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Embodiment Construction

[0017] As shown in the drawings, the hydraulic oil circuit and working principle of the present invention are:

[0018] 1) Main oil circuit: P1 port of pump / motor 3 is connected to A1 port of safety valve 11 through pump / motor oil circuit 5, B1 port of safety valve 11 is connected to A2 port of hydraulic check valve 14 , The B2 port of the hydraulic control check valve 14 is connected to the P2 port of the plunger cylinder 20 through the load oil circuit 12;

[0019] 2) Accumulator control oil circuit: The accumulator 10 is connected to the pump / motor oil circuit 5 through the accumulator oil circuit 9; the function of the accumulator is to suppress the pressure pulsation near the accumulator oil circuit 9 for easy installation of pressure Gauge and pressure sensor, detect pressure for closed-loop feedback control;

[0020] 3) Safety valve control oil circuit: The A1 or B1 oil port of the safety valve 11 is connected to the back cavity of the safety valve 11 through the safety val...

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Abstract

This invention discloses an integrate valve of frequency conversion and hydraulic pressure for elevator use. This integrate valve is connected between the elevating fluid jar of the fluid driving elevator chamber and the fluid pump that provides the oil resource of pressure, and the valve is the key part of the fluid control of the fluid elevator, it includes secure valve, pressure adjusting valve, unilateral fluid control valve, two double connective magnetic valve, manpower descending valve. The objected controlled is centralized and the appearance is simple. It not only meets the needs of normal elevating of the fluid lift, but also it has the fast truncation function as the lift descends, it reduces the lash of oil route and the lift can quickly stop when the power is cut or meets some malfunctions.

Description

Technical field [0001] The invention relates to hydraulic components, in particular to an integrated valve for variable frequency hydraulic elevators. Background technique [0002] The hydraulic elevator is an elevator that drives the elevator car up and down by the movement of the hydraulic cylinder plunger or piston. It has the advantages of large load capacity, safe and stable operation, and simple structure. Its speed control methods include simple control, large energy loss, low efficiency, throttling speed control, and volumetric speed control with less energy loss and higher efficiency. In volume speed control, the frequency converter that has appeared in recent years is used to control the motor. Variable frequency variable speed regulation (VVVF) to drive fixed displacement pumps / motors is the hottest spot. [0003] The frequency conversion drive hydraulic elevator realizes the volumetric speed regulation of the hydraulic elevator by changing the motor frequency conversi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B13/02F15B1/02B66B1/00
Inventor 徐兵胡东明
Owner ZHEJIANG UNIV
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