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Hand-operated pilot valve

A manual pilot valve and valve stem technology, applied in the field of pilot valve, can solve the problems of complex structure of manual pilot valve, large resistance of operating handle, complicated connection structure, etc., and achieve the effect of simple structure, not easy to leak, and simple connection structure

Active Publication Date: 2013-07-10
NINGBO LONG WALL FLUID KINETIC SCI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are as follows: first, there are two handles, and the connection structure between the cam-shaped handle and the ejector rod is complicated, resulting in a complicated structure of the entire manual pilot valve; second, the steel ball in the valve core assembly is easy to seal. Leakage occurs, resulting in poor sealing performance; third, because the two steel balls are still in contact with high-pressure hydraulic oil, the resistance received when operating the handle is still relatively large, making the operation inconvenient

Method used

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  • Hand-operated pilot valve

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0015] see figure 1 As shown, the manual pilot valve of the present invention includes a handle 1, a valve body 2, a push rod 3, a first spring 4, a first spring seat 5, a valve seat 6, a valve stem 7, a second spring seat 8, and a second spring 9 and screw plug 10, one end of the handle 1 is located outside the valve body 2, the other end of the handle 1 is rotatably connected to the pin shaft 12 inside the valve body 2 and the bottom side of the handle 1 is against the push rod 3, the second A spring 4 is sleeved on the push rod 3 with one end abutting on the boss of the push rod 3 and the other end abutting on the first spring seat 5, the push rod 3 slidingly fits with the valve seat 6, and the valve seat 6 There is an oil inlet 6.1, an oil outlet 6.2 and an oil return 6.3, the screw plug 10 is provided with an oil inlet 10.1, and the eject...

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Abstract

A hand-operated pilot valve comprises a handle, a valve body, an ejector rod, a first spring, a first spring seat, a valve seat, a valve rod, a second spring seat, a second spring and a plug, wherein one end of the handle is in rotational connection with a pin shaft in the valve body; the side surface at the bottom of the handle is propped against the ejector rod; the first spring is in sleeve joint with the ejector rod; one end of the first spring is propped against a lug boss on the ejector rod; the other end of the first spring is propped against the first spring seat; the ejector rod is in slide fit with the valve seat; an oil inlet, an oil outlet line and an oil return line are arranged on the valve seat; a blind hole and an oil return hole communicated with the blind hole are formed in the ejector rod; the valve rod is in slide fit with the valve seat; one end of the second spring is propped against the second spring seat; the other end of the second spring is propped against the plug; the second spring seat is in slide fit with the plug; one end of the plug is propped against the valve seat; the other end of the plug is in threaded connection with the valve body; and an oil chamber is communicated with the oil outlet line through a communication oil line. The hand-operated pilot valve is simple in structure, good in sealing performance and convenient to operate.

Description

technical field [0001] The invention relates to a pilot valve, in particular to a manual pilot valve. Background technique [0002] The website of the State Intellectual Property Office discloses a manual pilot valve. The pilot valve includes a valve body, a valve core assembly composed of a valve stem and two steel balls, a handle, a cam-shaped handle and a push rod. One end of the cam-shaped handle is hinged to the handle. The other end of the cam-shaped handle is connected with the ejector rod, and the steel ball in the valve core assembly is pushed by the ejector rod to open or close the oil circuit, realizing the function of the pilot valve to manipulate other valves or components. Its disadvantages are as follows: first, there are two handles, and the connection structure between the cam-shaped handle and the ejector rod is complicated, resulting in a complicated structure of the entire manual pilot valve; second, the steel ball in the valve core assembly is easy to se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02
Inventor 应永华何海瑞孙朝辉
Owner NINGBO LONG WALL FLUID KINETIC SCI TECH
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