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Needle valve capable of accurately adjusting flow rate

A technology for adjusting flow and needle valve, applied in the direction of functional valve type, valve details, safety valve, etc., can solve the problem of precise adjustment of adjustment accuracy, and achieve the effect of high precision and large flow

Inactive Publication Date: 2015-04-22
BEIJING INST OF AEROSPACE TESTING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, those who use the needle valve as the flow regulating mechanism in the prior art all adopt a throttling body as the main regulating structure, such as the Chinese patent CN1071743A, a dual-parameter regulating valve, published on May 5, 1992, in which the needle valve is combined with other structures Combined to form a regulating valve structure with two parameters, but the needle valve structure is composed of a throttling structure, the adjustment amount can be designed according to the use requirements, but the adjustment accuracy is limited by this throttling structure and cannot be adjusted more accurately

Method used

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  • Needle valve capable of accurately adjusting flow rate
  • Needle valve capable of accurately adjusting flow rate
  • Needle valve capable of accurately adjusting flow rate

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Experimental program
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Effect test

Embodiment 1

[0030] Combine below figure 1 Specifically explaining the present invention, the needle valve capable of accurately adjusting the flow rate of the present invention includes: a valve body 2, one end of the valve body 2 is provided with a needle valve inlet channel 1, and the other end of the valve body 2 is provided with a needle valve outlet flow channel. Road 8, valve body 2 also includes coarse adjustment valve stem 6, coarse adjustment flow channel 51; needle valve inlet flow channel 1, coarse adjustment valve stem 6, coarse adjustment flow channel 51, needle valve outlet flow channel 8 are connected in sequence; fluid can It enters from the needle valve inlet channel 1 and flows out from the needle valve outlet channel 8. The valve body 2 also includes a first fine adjustment orifice 4, a first fine adjustment valve stem 3, and a first fine adjustment flow channel 41; the radial cross-sectional area of ​​the first fine adjustment orifice 4 is smaller than the diameter of ...

Embodiment 2

[0040] This embodiment is an improvement on Embodiment 1, including all the technical features of Embodiment 1, and the valve body also includes a second fine adjustment orifice 42, a second fine adjustment valve stem 32, and a second fine adjustment flow channel 43; The cross-sectional area of ​​the second fine adjustment orifice 42 is less than the cross-sectional area of ​​the coarse adjustment channel 51; the needle valve inlet channel 1, the second fine adjustment orifice 42, the second fine adjustment valve stem 32, the second fine adjustment flow channel Road 43 and needle valve outlet flow channel 8 are connected in sequence. There is a coarse adjustment orifice 5 connected between the needle valve inlet flow channel 1 and the coarse adjustment flow channel 51, the coarse adjustment valve stem 6 cooperates with the coarse adjustment orifice 5 to control the flow rate, and the needle valve inlet flow channel 1 is connected to the second fine adjustment flow channel. The...

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Abstract

The invention discloses a needle valve capable of accurately adjusting flow rate. A first fine adjustment orifice, a first fine adjustment valve rod and a first fine adjustment runner are connected in parallel to an original coarse adjustment valve rod and an original coarse adjustment runner, so that the coarse adjustment valve rod and the coarse adjustment runner can control fluid in a large value range to pass; and the first fine adjustment orifice, the first fine adjustment valve rod and the first fine adjustment runner which are connected in parallel to the coarse adjustment valve rod and the coarse adjustment runner can be used for fine adjustment, so that the coarse adjustment valve rod can quickly adjust the flow rate in the large value range, and the first fine adjustment valve rod can ensure the accuracy of adjustment in a small value range. The total amount of the fluid flowing out of a valve body is equal to the sum of the flow rate controlled by the coarse adjustment valve rod and the first fine adjustment valve rod, so that not only the flow rate of the fluid flowing through the valve body can be adjusted in the large range, but also the adjustment accuracy of the valve body can be ensured.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a needle valve capable of precisely adjusting the flow rate of a controlled medium. Background technique [0002] Needle valves and needle valve structures and products are widely used in throttling and regulating flow or pressure products. The principle of regulating the flow is the principle of throttling, and the flow through the throttling part is changed by changing the flow resistance of the throttling part. In some flow-sensitive applications, it is necessary to have a structure or component that can accurately adjust the flow. In the current needle valve adjustment method, when a needle valve with a small adjustment amount is used, it can meet the flow adjustment accuracy requirements, but cannot Meet the requirements of the flow rate; when using a needle valve with a larger maximum flow rate, the flow adjustment accuracy of this type of needle valve is not satisfactory. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K17/20F16K27/02F16K37/00
Inventor 杨继志滕磊军任宏杰陈斌武孙拥军宋建军马玉坤成清校
Owner BEIJING INST OF AEROSPACE TESTING TECH