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XF - E18L limit valve

A technology of XF-E18L, limit valve, applied in the field of XF-E18L limit valve, can solve the problems of poor versatility, insufficient return reliability, and unsatisfactory performance of using poppet valve spool, and achieve reliable return , good effect on neutral

Inactive Publication Date: 2013-05-29
SICHUAN SINOTRUK WANGPAI XINGCHENG HYDRAULIC PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The length of the existing limit valve stem is fixed, so the versatility is poor. At the same time, the centering performance of the poppet valve core is not ideal, and the return reliability is insufficient.

Method used

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  • XF - E18L limit valve

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Effect test

Embodiment 1

[0006] Example 1, such as figure 1 As shown, the present invention includes a main body 2, a rear end 1, a valve core 5, a screw rod 6, an oil return pipe joint 7, and an oil inlet pipe joint 8. It is characterized in that the limit valve is a steel ball 4, and the two sides of the steel ball are connected with the return spring respectively. 3 is in contact with the spool, the screw rod is provided with an adjusting nut 9, and the valve body is provided with two mounting holes on the same vertical line. The rear end is processed into a threaded structure with round steel, the main body is milled with Q345 material, and then the oil holes are processed on the main body, the valve core is processed with 40Cr material, and the surface roughness is Ra0.4. The adjustment screw is equipped with a corresponding adjustment nut, which can realize the height adjustment function and is suitable for vehicles of different heights. The oil return pipe joint 7 is connected to the hydraulic...

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Abstract

The invention discloses an XF - E18L limit valve which comprises a main body (2), a rear end (1), a valve core (5), a screw (6), an oil return pipe connector (7) and an oil inlet pipe connector (8). The XF - E18L limit valve is characterized in that the limit valve is a steel ball (4), two sides of the steel ball (4) are respectively in contact with a return spring (3) and the valve core (5), an adjusting nut (9) is arranged on the screw (6), and two installation holes on the same perpendicular line are formed in the valve body. The XF - E18L limit valve adopts the steel ball as the valve core and adopts the spring for return centering. Compared with a prior cone valve type valve core, the valve core has the advantages of being good in centering performance, reliable in returning, and the like. Due to the fact that the adjustable adjusting screw is arranged on the limit valve, a user is enabled to set the cargo tank lifting angle as needed according to the vehicle type, a large quantity of usage cost is saved for the user, and replacement of components is enabled to be convenient and fast. The limit valve is installed vertically, adopts two parallel bolt holes, and has the advantages of being convenient to install, reliable in installation, and the like.

Description

technical field [0001] The invention relates to an oil circuit control element of a hydraulic system, in particular to an XF-E18L limit valve capable of ensuring more effective, safer and more stable hydraulic oil circuit actuators and improving the service life of each hydraulic actuator. Background technique [0002] The limit valve is an important hydraulic control device to ensure the safe and automatic unloading of the dump truck. When the hydraulic oil passes through the maximum rotation angle, it contacts the limit valve. At this time, the limit valve opens to form a circuit, and the hydraulic cylinder no longer moves to ensure the safe operation of the dump truck. , to adjust the lifting angle of the cargo box, protect the hydraulic cylinder, improve the service life of the oil pump, reduce the engine work, and reduce fuel consumption. The length of the stem of the existing limit valve is fixed, so the versatility is poor. At the same time, the centering performance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02
Inventor 曹守国张凡勇饶毅张敏唐海宏
Owner SICHUAN SINOTRUK WANGPAI XINGCHENG HYDRAULIC PARTS
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