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A quick unloading safety valve

A safety valve and fast technology, applied in the field of hydraulic components, can solve problems such as poor reliability, blocked orifice, and high requirements for oil circuit cleanliness

Active Publication Date: 2017-12-26
NANJING NAUTICAL INSTR PLANT NO 2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

see Figure 5 As shown, the pilot-operated relief valve has better characteristics, and the opening pressure is closer to the full-flow relief pressure. However, the orifice of the pilot-operated relief valve is prone to blockage, and it requires relatively high cleanliness of the oil circuit and reliability. relatively poor

Method used

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  • A quick unloading safety valve
  • A quick unloading safety valve
  • A quick unloading safety valve

Examples

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Embodiment Construction

[0031] Below in conjunction with accompanying drawing, this technology is further described:

[0032] see figure 1 The quick unloading safety valve shown includes a valve body 1 and a valve core 2 that is moved and arranged in the valve body 1; the valve body 1 includes a main valve body 101 and a spring box 102 fixedly connected to the right end of the main valve body 101; the integral The spool 2 from left to right is a throttle end 201 with a smaller diameter, a tapered transition section 202, and a main body 203 with a larger diameter; the right end of the main valve body 101 is provided with a fixed sleeve 103 with a stepped hole; the fixed sleeve 103 is provided with a spool 2 for movement; the diameter of the left hole 4 with a smaller aperture of the fixed sleeve is larger than the diameter of the throttle end 201 of the spool 2 but smaller than the diameter of the main body 203, and an annular recess is set in the right hole with a larger aperture of the fixed sleeve...

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Abstract

The invention provides a safety valve. By the adoption of the safety valve, the flow pressure can be adjusted and set relative to the opening pressure. The safety valve comprises a valve body and a valve element. The valve body comprises a main valve body part and a spring box. The valve element comprises a throttling end, a conical transition segment and a main body, wherein the diameter of the throttling end is small, and the diameter of the main body is large. A fixing sleeve provided with a stepped hole is arranged in the right end of the main valve body. The valve element is movably arranged in the fixing sleeve. The diameter of a left small-diameter hole is larger than that of the throttling end of the valve element but smaller than that of the main body of the valve element. An annular groove is formed in a right large-diameter hole of the fixing sleeve. The annular groove communicates with an oil inlet formed in the main valve body and the left small-diameter hole of the fixing sleeve. A reset device is arranged inside the spring box. The safety valve further comprises a sliding sleeve and an adjusting device, wherein the sliding sleeve is movably arranged inside the main valve body, and the adjusting device is used for adjusting the axial position of the sliding sleeve. A groove is formed in the sliding sleeve, and the groove communicates with an oil outlet formed in the main valve body. A throttling hole is formed in the right end of the sliding sleeve, and the diameter of the throttling hole is slightly larger than that of the throttling end of the valve element.

Description

technical field [0001] This technology relates to hydraulic components and provides a safety valve, especially a quick unloading safety valve that is mostly used in systems such as force accumulators and ship hydraulic steering gears. The flow pressure of the quick unloading safety valve can be adjusted relative to the cracking pressure ,set up. Background technique [0002] The safety valve is mostly used in systems such as accumulators and ship hydraulic steering gear. The main function is: when the accumulator or oil circuit is overloaded due to external force or accident, the safety valve opens quickly to unload and overflow to protect the accumulator. The safety of components such as devices, oil circuits, and actuators. [0003] In the prior art, direct-acting overflow valves or pilot-operated overflow valves are often used as safety valves. see Figure 4 As shown, the characteristics of the direct-acting relief valve are: Since the pressure when the relief valve is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K17/04F15B13/02
CPCF15B13/02F16K17/04
Inventor 刘强丁汝森许爱军糜翔孙家腾马全友王磊
Owner NANJING NAUTICAL INSTR PLANT NO 2
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