Casting valve cage with adjustable precision

Abstract

The invention provides a precision-adjustable cast valve cage which is characterized in that the precision-adjustable cast valve cage comprises a connecting part and a flow adjusting part, the connecting part and the flow adjusting part are integrally cast and connected, and a plurality of groups of flow adjusting units are uniformly distributed on the lower side of the flow adjusting part; through integral one-time casting forming, the production mode is simple, meanwhile, a high-precision finished product can be rapidly obtained, and the production efficiency is improved; the valve cage which is integrally cast and molded is matched with the valve core, so that a flow characteristic curve can be met, equal-percentage flow adjustment is realized, the valve can adapt to the working condition requirement of small flow, and meanwhile, the adjustment precision of the valve is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of regulating valve components, and in particular to a precision-adjustable casting valve cage. Background Art

[0002] Regulating valves are used in fluid systems to control the pressure, temperature and flow of fluids.

[0003] The cage is a key component of the cage-type regulating valve. By cooperating with the valve core, it changes the flow area between the valve core and the cage, thereby achieving precise regulation of the fluid flow.

[0004] As the size of domestic equipment continues to increase, the requirements for valve control are also getting higher and higher. When the pressure difference in gas and steam working conditions is relatively large, the valve vibrates severely and the outlet pressure fluctuates greatly, which in turn leads to a decrease in its adjustment performance. The high noise and high flow rate caused by the high pressure difference greatly reduce the actual service life of the valve.

[0005] To solve this problem, the present invention provides an integrally cast precision-adjustable cast valve cage. Summary of the Invention

[0006] In response to the above technical problems, the present invention provides a precision-adjustable cast valve cage that improves guiding capability and high flow capacity, can be combined with different regulating valves, and can be widely applied to standard valve trims to improve the performance of the regulating valve.

[0007] The present invention provides a precision-adjustable cast valve cage, which is characterized by comprising a connecting portion and a flow regulating portion, wherein the connecting portion and the flow regulating portion are integrally cast and connected, and a plurality of flow regulating units are evenly distributed on the lower side of the flow regulating portion.

[0008] Each group of flow regulating units includes a flow regulating small hole and a flow regulating perforation. The flow regulating small hole and the flow regulating large hole have the same shape but different sizes. The flow regulating large hole is arranged beside the flow regulating small hole.

[0009] The top wall of each of the flow regulating small holes and the flow regulating large holes is linear, and the left and right sides of the top wall of each of the flow regulating small holes and the flow regulating large holes are rounded and integrally cast to connect to the side upper wall. The two side upper walls are arranged opposite to each other, and each of the side upper walls is linear. The bottom of each side upper wall is integrally cast to connect to the side lower wall. The two side lower walls are arranged opposite to each other, and each side lower wall is arc-shaped. The two side lower walls are connected by a bottom wall, and the bottom wall is arc-shaped. A connecting bayonet is provided inside each bottom wall.

[0010] The inner side wall of the connecting portion is provided with clamping grooves at the upper and lower sides.

[0011] The beneficial effects of the present invention are as follows: the present invention is a precision-adjustable cast valve cage, which is formed by one-time casting as a whole, so that its production method is simple and high-precision finished products can be obtained quickly, thereby improving production efficiency; the valve cage after integral casting cooperates with the valve core to meet the flow characteristic curve and realize equal percentage flow regulation, so that it can adapt to the working conditions of smaller flow rates while improving the valve adjustment accuracy and enhancing the ability of the valve cage to resist high pressure differences; the valve cage provides guiding capability to the valve core, and at the same time, the valve cage has a large flow capacity, which well guarantees the high pressure difference and high precision requirements on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 is a schematic diagram of each group of flow regulating units of the present invention; Figure 3 Schematic diagram of flow characteristic curve.

[0013] Figure numerals: 1-connecting part; 11-card slot; 2-flow regulating part; 21-flow regulating small hole; 22-flow regulating large hole; 211-side lower wall; 212-bottom wall; 213-side upper wall; 214-top wall; 215-connecting bayonet. DETAILED DESCRIPTION

[0014] Example 1

[0015] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.

[0016] like Figure 1 As shown, the present invention provides a precision-adjustable cast valve cage, which is characterized by comprising a connecting portion and a flow regulating portion, wherein the connecting portion and the flow regulating portion are integrally cast and connected, and a plurality of flow regulating units are evenly distributed on the lower side of the flow regulating portion.

[0017] like Figure 2 As shown, each group of flow regulating units includes a flow regulating small hole 21 and a flow regulating large hole 22 . The flow regulating small hole 21 and the flow regulating large hole 22 have the same shape but different sizes. The flow regulating large hole 22 is arranged beside the flow regulating small hole 21 .

[0018] The top wall of each flow regulating hole 21 and the flow regulating hole 22 is linear, and the left and right sides of the top wall 214 of each flow regulating hole 21 and the flow regulating hole 22 are rounded and integrally cast to connect the side upper wall 213. The two side upper walls 213 are arranged opposite to each other, and each side upper wall 213 is linear. The bottom of each side upper wall 213 is integrally cast to connect the side lower wall 211. The two side lower walls 211 are arranged opposite to each other, and each side lower wall 211 is arc-shaped. The two side lower walls 211 are connected by a bottom wall 212, and the bottom wall 212 is arc-shaped. A connecting bayonet 215 is provided inside each bottom wall 212.

[0019] The inner wall of the connecting portion 1 is provided with upper and lower slots 11 .

[0020] Example 2

[0021] When the present invention is in use: the valve cage is assembled with the standard valve core, so that the valve core is assembled into the valve cage, the valve core slowly moves upward, and the fluid gradually spreads upward through the bottom of the flow regulating large hole 22. As the valve core continues to move upward, the fluid gradually enters through the flow regulating small hole 21. Among them, the different shapes of the inner walls of the flow regulating small hole 21 and the flow regulating large hole 22 are designed to ensure that the fluid meets the requirements of the flow process. Figure 3 The equal percentage flow regulation and equal percentage flow curve regulation have the characteristics of high regulation accuracy and support for small flow conditions compared with linear regulation and quick opening regulation.

[0022] The above shows and describes the basic principles, main features, and advantages of the present invention. The various components mentioned in the present invention are conventional technologies in the prior art. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A precision-adjustable cast valve cage, characterized in that It comprises a connecting part and a flow regulating part. The connecting part and the flow regulating part are integrally cast and connected. A plurality of flow regulating units are evenly distributed on the lower side of the flow regulating part.

2. A precision-adjustable cast cage according to claim 1, characterized in that Each group of flow regulating units includes a flow regulating small hole and a flow regulating large hole. The flow regulating small hole and the flow regulating large hole have the same shape but different sizes. The flow regulating large hole is arranged beside the flow regulating small hole.

3. The precision-adjustable cast cage according to claim 1, characterized in that The top wall of each of the flow regulating small holes and the flow regulating large holes is linear, and the left and right sides of the top wall of each of the flow regulating small holes and the flow regulating large holes are rounded and integrally cast to connect to the side upper wall. The two side upper walls are arranged opposite to each other, and each of the side upper walls is linear. The bottom of each side upper wall is integrally cast to connect to the side lower wall. The two side lower walls are arranged opposite to each other, and each side lower wall is arc-shaped. The two side lower walls are connected by a bottom wall, and the bottom wall is arc-shaped. A connecting bayonet is provided inside each bottom wall.

4. The precision-adjustable cast cage according to claim 1, characterized in that The inner side wall of the connecting portion is provided with clamping grooves at the upper and lower sides.

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