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Ball valve capable of adjusting flow finely

A ball valve and flow technology, applied in the field of ball valves that can fine-tune the flow, can solve the problems that the small flow path cannot be accurately adjusted, the screw fluid leaks, and the large flow cannot be passed, and achieves the effect of saving process debugging time and high adjustment accuracy.

Inactive Publication Date: 2020-01-14
SHANGHAI RES INST OF CHEM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ball valve in this patented technology cannot simultaneously maintain a large flow rate for a long time, and at the same time realize fast and accurate flow fine-tuning on the basis of this flow rate
This is because 1. The fluid passage in the ball core is a large through hole, and a small change in the opening will cause a huge change in the flow rate. For some small flow paths that require micro-adjustment, precise adjustment cannot be achieved.
2. If the fluid passage is completely set as a slit type, although the small flow can be accurately adjusted, it cannot pass a large flow due to the narrow slit
But in fact, 1. It is easy to understand that the strength of hand pressure cannot be quantified, and it is impossible to achieve accurate flow control by hand pressure; 2. Generally speaking, the passage of the ball valve core is a circular cross-section, and the screw is a blocking flow. The channel must also be a circular section, and the ball valve cannot provide space for it to slide up and down; 3. Even if the screw can slide up and down, due to the contact between the flow channel and the screw, it is easy to cause fluid leakage at the screw
Therefore, the invention cannot realize the long-term maintenance of a large flow rate at the same time, and can also realize fast and accurate fine-tuning of the flow rate on the basis of this flow rate

Method used

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  • Ball valve capable of adjusting flow finely
  • Ball valve capable of adjusting flow finely
  • Ball valve capable of adjusting flow finely

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A ball valve with fine adjustment of flow rate, such as figure 1 As shown, it includes the valve body 2 and the end cover 3 that constitute the valve cavity, the ball core 4 set in the valve cavity, and the adjustment handle 1 that drives the ball core 4 to rotate. The adjustment handle 1 runs through the side wall of the valve body 2 and is connected with the valve The body 2 is connected in rotation, and the end of the adjustment handle is fixedly connected with the ball core 4. The ball core 4 is provided with a through valve passage 5, and the valve body 2 and the end cover 3 are provided with a fluid passage communicating with the valve cavity.

[0032] Such as figure 2 As shown, the section shape of the valve channel 5 in this embodiment is a mushroom shape, including the main channel 51 and the slit channel 52 connected. When the ball core 4 rotates from the fully closed position to the fully open position, the main channel 51, the slit channel The slit channe...

Embodiment 2

[0036] The structure of this embodiment is substantially the same as that of Embodiment 1, except that the flow area of ​​the valve channel 5 is different, and the corresponding large flow setting value is different. Install the ball valve with flow fine-tuning area of ​​this embodiment in the chemical pipeline, and the flow rate corresponding to the designed valve opening of 45° is the flow rate required by the pipeline standard: 80L / h. The handle rotates 45°, at this time the ball core rotates slowly accordingly, the liquid reactant passes through the regulating valve from the main channel part exposed to the pipeline, and then exits the valve with a flow rate of 80L / h. After a period of time, the purity of the materials used decreases. It is necessary to slightly increase the pipeline flow rate to 80.03L / h. At this time, continue to rotate the handle by 1° (at this time, the opening is 46°), the liquid reactant flows through the main channel part and the slit channel part ...

Embodiment 3

[0039] The structure of this embodiment is the same as the main structure of Embodiment 1, except that the size of the slit channel 52 is different. In this embodiment, the width of the slit channel 52 is 0.05 times the length of the vertical side of the arc shape. For the flow The fine-tuning range is smaller and the flow adjustment is more precise.

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Abstract

The invention relates to a ball valve capable of adjusting flow finely. The ball valve comprises a valve body and an end cover forming a valve cavity, a ball core arranged in the valve cavity and an adjusting handle which drives the ball core to rotate. A penetrating valve channel is arranged on the ball core, a fluid channel communicating to the valve cavity is arranged on the valve body and theend cover, the valve channel comprises a main channel and a slit channel, and in a process that the ball core rotates from a totally closed position to a totally opened position, the main channel andthe slit channel communicate to the fluid channel successively. Compared with the prior art, the ball valve has the advantages of being quick, accurate and convenient to adjust the flow and the like.

Description

technical field [0001] The invention relates to a ball valve, in particular to a ball valve capable of fine-tuning flow. Background technique [0002] Ball valves are widely used due to their small size and corrosion resistance. Its basic function is to cut off and connect the medium through the rotation of the ball core. The ball valve is mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. It only needs to be rotated 90 degrees and a small rotational torque can be closed tightly. A general ball valve consists of a valve body, a ball and a valve stem. In some engineering fields, the flow valve is required to be stable at a fixed flow rate for a long time, and it can also give an offset value to the flow rate through fast and accurate fine-tuning under certain special test conditions. [0003] Chinese patent CN105387238A discloses a ball valve that can be closed quickly and can fine-tune the flow rate. The screw rod can be presse...

Claims

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Application Information

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IPC IPC(8): F16K5/06F16K27/06
CPCF16K5/0605F16K5/0647F16K27/067
Inventor 冷远鹏范宾刘赟张小沁
Owner SHANGHAI RES INST OF CHEM IND