Commercial vehicle unloading valve
An unloading valve, commercial vehicle technology, applied to vehicle components, control valves, air release valves, brakes, etc., can solve the problems of unloading effect, unloading delay, large unloading valve structure, etc., to ensure sensitive degree, the effect of preventing backflow
Inactive Publication Date: 2018-05-04
ZHEJIANG KELI VEHICLE CONTROL SYST
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Problems solved by technology
The structure of the existing unloading valve is relatively large and not compact enough. In addition, the existing unloading valve is not equipped with an emergency liquid inlet, and the unloading will be delayed in an emergency. In addition, most of the existing automatic unloading valves use springs to realize the valve switch. , the elastic force of the spring will drop after a long time of use, which will affect the unloading effect and cause the low-pressure oil to flow directly to the oil return channel
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Embodiment 1
[0019] Unloading valves for commercial vehicles, such as Figure 1-Figure 2 As shown, the commercial vehicle unloading valve includes a valve body, and the valve body is provided with a first liquid inlet channel 1, a second liquid inlet channel 2, a liquid channel 3, and an oil return channel 4. The first liquid inlet channel 1 includes two part, the diameter of the lower part is getting smaller and smaller from bottom to top and is inclined at 70°, and the upper part is vertically arranged with the same diameter. The liquid channel 3 is connected with the first liquid inlet channel 1 and the oil return channel 4 respectively. The liquid channel 3 is provided with a needle valve 5 that blocks and communicates with the liquid channel 3. The second liquid inlet channel 2 communicates with the first liquid inlet channel 1 through a through hole 6. The diameter of the through hole 6 is 30 mm. The liquid inlet channel 2 communicates with the oil return channel 4, and a control val...
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The invention relates to the field of vehicle valves, and discloses a commercial vehicle unloading valve. The commercial vehicle unloading valve comprises a valve body, a first liquid inlet channel, asecond liquid inlet channel, a liquid channel and an oil returning channel are formed in the valve body, the liquid channel is communicated with the first liquid inlet channel and the oil returning channel, the second liquid inlet channel is communicated with the first liquid inlet channel, a control valve is arranged between the second liquid inlet channel and the oil returning channel, the control valve comprises a cup-shaped sliding valve and a powering-on coil, an annular fixing column is arranged on the inner wall of the valve body, the powering-on coil is wound on the fixing column, a permanent magnet block is arranged at the inner bottom of the cup-shaped sliding valve, a pressure spring is arranged in the fixing column, and the powering-on coil is connected with a pressure adjuster and a power source. The pressure adjuster, the coil and the permanent magnet block are cooperated with the pressure spring to provide thrust for the cup-shaped sliding valve, the phenomenon that after a return spring is used for a long time and deforms, elastic force is affected, and low-pressure oil directly flows to the oil returning channel is avoided, the low-pressure oil enters the cup-shaped sliding valve to balance pressure inside and outside the cup-shaped sliding valve, a valve cover is detachable, and mounting of a needle valve is facilitated.
Description
technical field [0001] The invention relates to the field of vehicle valve bodies, in particular to a commercial vehicle unloading valve. Background technique [0002] At present, the unloading valve is mainly used in the pressure pipeline of the braking system of automobiles or construction machinery to automatically adjust the working pressure in the braking system, and to automatically discharge the filtered oil, water and other impurities through the unloading valve. The structure of the existing unloading valve is relatively large and not compact enough. In addition, the existing unloading valve is not equipped with an emergency liquid inlet, and the unloading will be delayed in an emergency. In addition, most of the existing automatic unloading valves use springs to realize the valve switch. , After the spring has been used for a long time, the elastic force will decrease, which will affect the unloading effect and cause the low-pressure oil to flow directly to the oil...
Claims
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IPC IPC(8): F15B13/02B60T15/02
CPCF15B13/024B60T15/02
Inventor 马靖
Owner ZHEJIANG KELI VEHICLE CONTROL SYST