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Large-diameter pressure reducing valve for agricultural irrigation with pivot valve based on pressure distributing principle and application method thereof

A large-diameter, pressure-reducing valve technology, applied in the field of pressure-reducing valves, can solve the problems of inability to ensure the stability of downstream pressure, entanglement of impurities such as weeds, and reduced pressure-reducing stability, etc., to achieve light weight, good energy saving effect, high pressure small loss effect

Pending Publication Date: 2017-05-31
YANGZHOU UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pressure reducing valve has the following problems in the application process: the size of the needle valve is small, and it is easy to be entangled and blocked by impurities such as weeds; when the size of the needle valve is increased, the stability of the pressure reduction is reduced, and the downstream pressure cannot be guaranteed. Stablize

Method used

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  • Large-diameter pressure reducing valve for agricultural irrigation with pivot valve based on pressure distributing principle and application method thereof
  • Large-diameter pressure reducing valve for agricultural irrigation with pivot valve based on pressure distributing principle and application method thereof

Examples

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Embodiment Construction

[0032] Such as figure 1 , figure 2 As shown, a pilot valve based on the principle of pressure distribution of agricultural irrigation large-diameter pressure reducing valve, including a main valve 1, a pilot valve 2 and a connecting pipe. The main valve includes a valve body 27, a valve seat 28, a valve disc 4, a main valve spring 3, a main valve stem 5, a servomotor 6, and a servomotor cylinder 7. The valve seat 28 supports the valve disc 4, the main valve spring 3 is wound on the valve stem 5 and welded to the valve disc 3, and the main valve upper cavity 9 is above the servomotor 6.

[0033] The pilot valve includes a pilot valve chamber 10 (hollow cylindrical structure) and a pilot valve spring 11, a piston 12, and a pilot valve stem 13 placed in the pilot valve chamber. The piston divides the pilot valve chamber into a pilot valve upper chamber 14 , Pilot valve lower cavity 15, the surface of the pilot valve stem is provided with external threads, the bottom of the pilot v...

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Abstract

The invention discloses a large-diameter pressure reducing valve for agricultural irrigation with a pivot valve based on a pressure distributing principle and an application method thereof. The pressure reducing valve comprises a main valve, the pivot valve and a connecting pipe. The main valve comprises a valve clack, a spring and a valve rod. The pivot valve comprises a pivot valve spring, a piston and an exhaust valve; one end of the pivot valve spring is connected to a piston while the other end is connected to a pad; the pad sleeves a pivot valve rod, and the exhaust valve is arranged on the top of the pivot valve; the pivot valve is connected to the upstream of the main valve through an upstream connecting pipe and is connected to the downstream of the main valve through a downstream connecting pipe; the pivot valve is connected to an upper cavity of the main valve through a main valve connecting pipe and the connection of the upstream connecting pipe and the pivot valve is a diffused section. The pressure reducing valve disclosed by the invention is skillful in design and simple in principle and structure, meets the characteristic of an agricultural water delivery irrigation project, is good in effect of preventing impurity blockage and is good in pressure-reducing and pressure-stabilizing effect.

Description

Technical field [0001] The invention relates to a pressure reducing valve, in particular to a large-caliber pressure reducing valve for agricultural irrigation based on the principle of pressure distribution and an application method thereof, and belongs to the category of water pipeline safety protection devices and application methods. Background technique [0002] The pressure reducing valve adjusts and reduces the pressure of the medium by controlling the opening of the opening and closing parts in the valve body. At the same time, the opening of the opening and closing parts is adjusted by the pressure after the valve, so as to maintain the pressure behind the valve under the condition of constantly changing inlet pressure. Valves within a certain range. In large-scale irrigation projects or long-distance water delivery projects, the pressure reducing valve is an indispensable safety protection device. [0003] According to different working principles, the pressure reducing ...

Claims

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Application Information

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IPC IPC(8): F16K17/32F16K31/363
CPCF16K17/32F16K31/363
Inventor 陈松山于贤磊周明耀
Owner YANGZHOU UNIV
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