Valve type orifice throttling device
A technology of throttling device and orifice plate, which is applied in the direction of measuring fluid flow by measuring pressure difference, volume/mass flow generated by mechanical effect, etc., and can solve problems such as misoperation by operators, complicated replacement process, and easily damaged slide valves. Achieve the effect of preventing misoperation, low cost, and good rigidity
Active Publication Date: 2016-04-27
DEYANG DIXINJIA VALVE MFR
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Problems solved by technology
However, because the replacement process of the throttling device is very complicated, in the actual replacement process, the operator is prone to misuse, for example, directly turning the gear shaft to open the spool valve without opening the balance valve, not only is it easy to damage the spool valve, Seriously, it will cause personal injury
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[0019] A valve-type orifice throttling device, comprising an upper valve body 1, a lower valve body 2, a gear shaft 3 for controlling the opening and closing of a slide valve, an air intake pipe and a self-locking limit mechanism, and the gear shaft 3 is arranged on the lower valve body On the body 2, the end of the gear shaft 3 is provided with a limit groove 4, and the self-locking limit mechanism is arranged above the limit groove 4, and is respectively connected with the valve cavity of the upper valve body 1 and the valve cavity of the lower valve body 2 through the intake pipe. Connected, when the pressure in the valve cavity of the upper valve body 1 and the valve cavity of the lower valve body 2 is unbalanced, the self-locking limit mechanism cooperates with the limit groove 4 to lock the gear shaft 3 .
[0020] A preferred embodiment of the present invention is that the self-locking limit mechanism includes a cylinder 5, an elastic element 7 and a bracket 6, and the el...
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The invention discloses a valve-type orifice plate throttling device comprising an upper valve block, a lower valve block, a gear shaft used for controlling a slide valve to open and close, an intake pipe, and a self-locking limiting mechanism. The gear shaft is disposed on the lower valve block. One end of the gear shaft is provided with a limit groove. The self-locking limiting mechanism is arranged above the limit groove and communicated with both an upper valve block cavity and a lower valve block cavity through the intake pipe. When pressures in the upper and lower valve block cavities are unbalanced, the self-locking limiting mechanism and the limit groove coordinate to lock the gear shaft. The valve-type orifice plate throttling device has the advantages that an operator can be prevented from forcibly opening the slide valve when the pressures are unbalanced, and equipment safety is improved.
Description
technical field [0001] The invention relates to a measuring device for pipeline fluid flow, in particular to a high-grade valve type orifice throttling device. Background technique [0002] In the prior art, the advanced valve-type orifice throttling device uses a standard orifice plate as a measuring element, which is widely used in the measurement of gas, liquid and steam flow because it can realize continuous flow replacement of the orifice plate. For example, Chinese Patent No. "200930246502.2" discloses a high-grade valve-type orifice plate throttling device. In the prior art represented by this type of throttling device, when replacing the orifice plate, it is usually necessary to open the balance valve first, and then the upper valve body After the pressure in the valve chamber is balanced with the pressure in the valve chamber of the lower valve body, three handles are used to complete the replacement of the orifice plate. However, because the replacement process of...
Claims
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IPC IPC(8): G01F1/42
Inventor 黄斌刘波胡万明
Owner DEYANG DIXINJIA VALVE MFR