Down slow pneumatic control distributing valve

A technology for distributing valves and air drop, applied in the direction of valve details, multi-way valves, valve devices, etc., can solve the problems of poor control of drop accuracy, poor speed control, vehicle and personnel casualties, etc., and achieve reliable, stable and slow The effects of speed reduction, simple installation structure, and ease of manufacture and assembly

Inactive Publication Date: 2015-10-14
SHIYAN PENGZE CAR COMPONENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the structure of the air control distribution valve, the Hyva 200L/min three-hole air control valve is generally used. The air control valve adopts a proportional control method to adjust the descending speed of the large tank, and the speed adjustment is operated by a manual valve installed in the cab....

Method used

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  • Down slow pneumatic control distributing valve
  • Down slow pneumatic control distributing valve
  • Down slow pneumatic control distributing valve

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Embodiment Construction

[0011] Such as figure 1 , figure 2 , image 3 As shown, the present invention is further described as follows: a slow-fall air-controlled distributing valve, comprising a valve body 1, a sliding sealing valve core 5 is installed in the valve body 1, and an input channel, an output channel, and an oil return channel are arranged in the valve body 1, and the sliding The sealing spool 5 is provided with stepped journals corresponding to the input passage, output passage and oil return passage, the head of the valve body 1 is provided with a plug 16, and the valve body is also provided with a pilot relief valve connection port (non-connecting In the state, it is blocked by the ball expansion plug 4), the oil inlet P on the valve body is connected with the input channel, the oil return port T on the valve body is connected with the oil return channel, and the oil outlet A on the valve body is connected with the oil return channel. The output channel is connected; the cylinder bo...

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Abstract

The invention provides a down slow pneumatic control distributing valve comprising a valve body, a slide seal valve core, a cylinder body, and a commutation piston in the cylinder body; the improvements are that a down slow piston is arranged between the commutation piston and a cover plate, and sealed with the cylinder body; a first air inlet is arranged between the commutation piston and the down slow piston; the cover plate is provided with a second air inlet; a journey limit sleeve mounting structure is arranged in the cylinder body, a mounting step is arranged in the cylinder body, the journey limit sleeve is sealed with a cylinder body cavity in a slide manner, and limited by the mounting step; the center of the cover plate on the tail portion of the cylinder body is provided with an adjusting bolt; the head of the adjusting bolt extends into the cylinder body. When down slow is needed, compressed air passes the second air inlet, the down slot piston pushes the commutation piston and the valve core to move for certain distance under air pressure effect, thus reducing an oil return channel, and realizing reliable and stable down slow speed; in addition, the journey limit sleeve mounting structure in the cylinder body is simple, so the journey limit sleeve is convenient to make and assemble.

Description

technical field [0001] The invention relates to an air-controlled distributing valve with a constant-speed slow-down function, which is matched with a vehicle lifting device controlled by a hydraulic system. Background technique [0002] In the field of dump trucks, air-controlled distribution valves have been widely used to control the lifting of dump truck containers. In the structure of the air control distribution valve, the Hyva type 200L / min three-hole air control valve is generally used. The air control valve adopts a proportional control method to adjust the speed of the tank’s descent, and the speed adjustment is operated by a manual valve installed in the cab. The rotation angle of the handle is used to realize the control, but in actual use, due to the complex and changeable working conditions, the accuracy of the control decline is often difficult to control, resulting in poor speed control when slow speed is required, resulting in vehicle and personnel casualtie...

Claims

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Application Information

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IPC IPC(8): F16K11/07F16K31/122
CPCF16K11/07F15B15/1428F15B15/227F15B15/24F16K31/1225
Inventor 李学军郑建国
Owner SHIYAN PENGZE CAR COMPONENT
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