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Large-flow quick throttle proportional valve

A technology of proportional valve and large flow, which is applied in fluid pressure actuators, servo motor components, mechanical equipment, etc., and can solve the problem of servo valve cost, high use and maintenance costs, short action time, and proportional valves that are difficult to meet the flow and flow requirements at the same time. Action time and other issues, to achieve important application and economic value, reduce the effect of application costs

Active Publication Date: 2009-10-21
ZHEJIANG UNIV +3
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In some large-scale hydraulic equipment and hydraulic systems, such as hydraulic presses, die-casting machines, injection molding machines, etc., certain processes require rapid throttling of large flows, due to large rated flows (greater than 2000L / min) and short action times (5~ 20ms), proportional valves are difficult to meet the requirements of flow and action time at the same time, although large flow servo valves can meet the requirements at the same time, but the cost of the servo valve itself and its matching servo control system, use and maintenance costs are high, so a The low-cost large-flow fast-throttle proportional valve that can quickly throttle large flow to meet process requirements has important application value

Method used

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] Such as figure 1 As shown, a large flow rate fast throttle proportional valve, including main stage cartridge valve components and pilot control valve block components, where:

[0018] The main stage cartridge valve components include the main valve core 6, the main valve seat 7 and the return spring 8; , the upper end of the main valve core 6 cooperates with the lower end of the proportional valve stem 5 in the pilot control valve block, and the lower end surface of the main valve core 6 has a throttling window C1;

[0019] Pilot control valve block components include three-way proportional pressure reducing valve 2, piston cylinder 3, adjustment spring 4, proportional valve stem 5, one-way damping valve 9, normally open two-position three-way valve reversing valve 10, pilot high-speed switching valve 11 and two-way pressure reducing valve 12;...

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Abstract

The invention discloses a large-flow quick throttle proportional valve, which comprises a primary cartridge valve and a pilot control valve block, wherein the primary cartridge valve consists of a main valve core, a main valve seat and a reset spring, and the pilot control valve block consists of a three-way proportional pressure-reducing valve, a piston cylinder, a regulating spring, a proportional valve rod, a one-way damping valve, a two-position three-way reversing valve, a pilot high-speed switching valve and a two-way pressure-reducing valve. The other type of large-flow quick throttle proportional valve consists of an energy accumulator arranged on the basis of the previous type of large-flow quick throttle proportional valve. As the proportional valve adopts a two-stage switch drive structure as a pilot stage to quickly drive the main valve core, and controls the proportion of a target throttling position of the main valve core through the position follow-up between the proportional valve rod and the main valve core in special design, the proportional valve not only can quickly throttle large flow, but also can control the proportion of the target throttling position. The proportional valve is a novel practical hydraulic control valve, and has important application and economic value.

Description

technical field [0001] The invention relates to the field of fluid transmission and control, in particular to a large-flow rapid throttling proportional valve. Background technique [0002] In some large-scale hydraulic equipment and hydraulic systems, such as hydraulic presses, die-casting machines, injection molding machines, etc., certain processes require rapid throttling of large flows, due to large rated flows (greater than 2000L / min) and short action times (5~ 20ms), proportional valves are difficult to meet the requirements of flow and action time at the same time, although large flow servo valves can meet the requirements at the same time, but the cost of the servo valve itself and its matching servo control system, use and maintenance costs are high, so a The low-cost large-flow fast-throttle proportional valve that can quickly throttle large flow to meet process requirements has important application value. Contents of the invention [0003] The object of the p...

Claims

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Application Information

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IPC IPC(8): F15B13/02
Inventor 孔晓武魏建华姜伟姜洪邓业民
Owner ZHEJIANG UNIV
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