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Cock regulating valve with high adjustable ratio

A technology of regulating valve and ratio adjustment, which is applied to the cock, valve details, valve device and other directions including the cut-off device. It can solve problems such as high pressure difference, and achieve the effect of small flow resistance, high flow capacity and large adjustable ratio.

Active Publication Date: 2019-11-08
HEFEI GENERAL MACHINERY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problem that the control valve has extremely small flow rate and high pressure difference in the start-up stage and has large flow rate and extremely small pressure drop during stable operation, the present invention provides a high adjustable ratio cock control valve

Method used

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  • Cock regulating valve with high adjustable ratio
  • Cock regulating valve with high adjustable ratio
  • Cock regulating valve with high adjustable ratio

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Such as figure 1 , 2, 3a, 3b-3d, 4a-4b, 4c-4e, a high adjustable ratio cock regulating valve, including valve body 1, valve body sealing assembly 2, valve stem 3, valve seat 4 and cock 5; The valve body 1 is provided with a longitudinal through hole and a transverse through hole for forming a fluid inlet and outlet; the longitudinal through hole is provided with a valve stem 3 and a cock 5 connected up and down; the valve body sealing assembly 2 is arranged at the bottom of the cock 5 The valve seat 4 is in the shape of a hollow circular platform, and the cock 5 is in the shape of a circular platform; the valve seat 4 is sleeved on the outside of the cock 5, and the outer side of the valve seat 4 is airtightly fitted with the valve body 1, and the inner side is in sliding fit with the cock 5 The valve seat 4 is provided with a valve seat through hole 41 connected with the transverse through hole at the horizontal height where the transverse through hole is located, and...

Embodiment 2

[0040] On the basis of Embodiment 1, the drop-shaped window 51 includes a superior arc 511 and a sharp included angle 512; the opening of the included angle of the sharp included angle 512 faces the superior arc 511, forming two straight lines of the acute included angle 512 The segments are respectively smoothly connected with the ends of the superior arcs 511; the sharp angles 512 of the two drop-shaped windows 51 point oppositely.

[0041] Alternatively, the drop-shaped window 51 includes round through holes and angular grooves that are adjacent to each other and communicate with each other; the round through holes are arranged radially through the cock 5 at the level corresponding to the valve outlet and the valve inlet; The angular groove is symmetrical along the axis of the cock 5 and smoothly transitions with each intersection of the round through hole.

[0042] The angle formed by the angular groove and the circumferential intersection line of the cock 5 is an acute an...

Embodiment 3

[0044] On the basis of Embodiment 1, the valve body seal assembly 2 includes a bottom cover 21 affixed to the valve body 1, an axial preload assembly 22 for axially limiting the valve seat 4 and the cock 5; The bottom cover 21 is provided with a stepped hole in the axial direction; the axial preload assembly 22 includes a top shaft 221 disposed inside the stepped hole, and a preload cover 222 for axially limiting the top shaft 221. Between the top shaft 221 and the preload cover 222 is provided a disc spring 223 for clearance displacement of the top shaft 221 ; the preload cover 222 is also provided with an axial balance hole, and a plug 224 is provided in the balance hole.

[0045] The cock 5 in the form of a round platform is provided with a cock balance hole 53, and the cock balance hole 53 is provided with at least 2 groups; each group of the balance holes includes an upper balance hole 531 between the upper surface of the round platform and the cock passage 52, and the coc...

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Abstract

The invention relates to a cock regulating valve with a high adjustable ratio, belongs to the technical field of pipeline valves. The cock regulating valve comprises a valve body, a valve body sealingassembly, a valve rod, a valve seat and a cock, wherein the valve body is provided with a longitudinal through hole and a transverse through hole; the valve rod and the cock are arranged in the longitudinal through hole; the valve body sealing assembly is arranged at the bottom of the cock; the valve seat is hollow frustum-shaped, and the cock is frustum-shaped; the valve seat sleeves outside thecock, the outer side of the valve seat is hermetically matched with the valve body, and the inner side of the valve seat is in sliding fit with the cock; the valve seat is provided with a valve seatthrough hole which communicates with the transverse through hole, and the valve seat is fixedly connected with the valve body sealing assembly; the cock is provided with two water drop-shaped windows;and a cock passage is formed between the two drop-shaped windows, and the two drop-shaped windows are symmetrical in the axial direction of the cock. When the regulating valve is small in opening degree, the regulating valve has a linear flow characteristic; when the regulating valve is large in opening degree, the regulating valve has an equal percentage flow characteristic, high flow capacity and a high adjustable ratio; and when the regulating valve is fully opened, the throttling area is equal to the cross section area of inlet and outlet flow channels of the valve, and the flow resistance is extremely small.

Description

technical field [0001] The invention relates to the technical field of pipeline valves, in particular to a high adjustable ratio cock regulating valve. Background technique [0002] Regulating valve is an important link in automation control, its reliability and adjustment accuracy determine the safety and quality of automatic operation. Existing control valves are usually in the form of straight-stroke control valves and quarter-stroke control valves, and the adjustment of straight-stroke control valves is relatively small; such as the angular stroke A control valve whose flow characteristic is single equal percentage or linear. For special process control conditions that require extremely high control precision, such as extremely small flow and high pressure difference during start-up, and large flow and extremely small pressure drop during stable operation, the existing control valves cannot meet this requirement; therefore Restricted by the adjustable range of the cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K5/02F16K5/10F16K5/16F16K27/06F16K27/08
CPCF16K5/0207F16K5/0242F16K5/025F16K5/10F16K5/161F16K27/062F16K27/08
Inventor 耿圣陶王渭明友陈凤官余宏兵叶晓节郝伟沙高红彪
Owner HEFEI GENERAL MACHINERY RES INST
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