Flow straightening device for process valve outflow

Abstract

The present invention discloses a rectifying device for outflow of a process valve. A rectifying device is installed at the outlet of the process valve. The rectifying device includes, from upstream to downstream, an inlet component, a center component and an outlet component. When the fluid is transported in a pipeline, the opening regulation of the process valve will cause non-uniform eccentric turbulent flow near its outlet, accompanied by the generation of vortices, which seriously affects the stability of its outlet flow. The device can converge, disperse, eliminate vortices and integrate the outlet turbulent flow caused by the opening regulation of the process valve, effectively improve the turbulent flow, achieve an effective rectifying effect, and thus improve the stability of the outlet flow of the process valve. In addition, the present invention can be used in conjunction with a pipeline fluid measuring device, which is beneficial to the stable flow signal acquisition of the pipeline fluid measuring device and improves the measurement accuracy.

Description

Technical Field

[0001] The invention relates to a rectifying device, in particular to a rectifying device used for outflow of a process valve. Background Art

[0002] Process valves are an important equipment for fluid control in pipeline fluid transportation and are widely used in the fields of machinery, chemical industry, energy, etc. However, the opening of the process valve will cause non-uniform eccentric turbulent flow near its outlet, accompanied by the generation of vortices, which seriously affects the stability of its outlet flow, thereby restricting the signal acquisition and accuracy of the pipeline fluid metering device after the valve.

[0003] In reality, the traditional method is to extend the pipeline at the outlet of the process valve to obtain a more stable flow, but this puts high demands on the spatial layout of the process pipeline. However, the function of the rectifier is to transform the unstable flow into a stable flow, greatly shortening or eliminating the need to extend the pipeline.

[0004] At present, the existing rectifiers are mostly designed with a single rectifier structure, mainly including orifice plate type, tube bundle type and blade type, while the combined rectifier structure is less; secondly, the existing rectifier structure design has an unsatisfactory rectification effect, large flow resistance and poor versatility. Therefore, according to the non-uniform eccentric turbulent flow characteristics of the process valve outflow, with the rectification structure for the rectification effect and flow resistance as the purpose, it is of practical significance to carry out the rectification design of the process valve outflow in a targeted manner. Summary of the invention

[0005] The purpose of the present invention is to provide a rectifying device for the outflow of a process valve. According to the characteristics of the non-uniform eccentric turbulent outflow caused by the opening control of the process valve, a comprehensive rectifying method of convergence, uniform dispersion, vortex elimination and integration is adopted to effectively improve the turbulent flow and achieve an effective rectifying effect, thereby improving the stability of the flow at the outlet of the process valve.

[0006] In order to achieve the above object, the technical solution of the present invention is as follows:

[0007] The rectifying device for outflow of a process valve of the present invention comprises a process valve, wherein the rectifying device is installed at the outlet of the process valve, and the rectifying device comprises, from upstream to downstream, an inlet component, a central component and an outlet component.

[0008] The inlet component has a conical cavity body at one end close to the process valve and a conical cavity body at the other end.

[0009] The central component has a conical boss at one end near the inlet component, and 4 to 6 layers of arc waist holes are radially and equidistantly opened on the bottom surface of the conical boss. 5 to 8 arc waist holes and circular holes are evenly and alternately arranged on the circumference of each layer, and the other end is a buffer cavity.

[0010] The outlet component has a circular through hole at its center, and fan-shaped holes are evenly distributed in the circumferential direction of the outer periphery of the circular through hole.

[0011] The tapered cone angle of the tapered conical cavity α It is 15°~30°.

[0012] The gradually expanding cone angle of the gradually expanding conical cavity β It is 15°~30°.

[0013] The number of the evenly distributed fan-shaped holes is 20 to 30.

[0014] The extended line of the generatrix of the tapered conical cavity intersects at the vertex of the conical boss.

[0015] The present invention has the following beneficial effects:

[0016] When the fluid is transported in a pipeline, the opening control of the process valve will cause non-uniform eccentric turbulent flow near its outlet, accompanied by the generation of vortices, which seriously affects the stability of its outlet flow. The device can effectively improve the turbulent flow and achieve an effective rectification effect by converging, dispersing, eliminating vortices and integrating the outlet turbulent flow caused by the opening control of the process valve, thereby improving the stability of the outlet flow of the process valve. In addition, the device can be used in conjunction with a pipeline fluid measuring device, which is conducive to the stable flow signal acquisition of the pipeline fluid measuring device and improves the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the appearance of the present invention and the process valve assembly.

[0018] Figure 2 It is a stereogram of the structure of the present invention.

[0019] Figure 3 yes Figure 2 Front view of the inlet component.

[0020] Figure 4 yes Figure 3 1-1 cross-sectional view.

[0021] Figure 5 yes Figure 2 Front view of the centerpiece.

[0022] Figure 6 yes Figure 5 2-2 cross-sectional view.

[0023] Figure 7 yes Figure 2 Front view of the outlet component.

[0024] Figure 8 yes Figure 7 3-3 sectional view.

[0025] Fig. 9 It is a sectional view of the overall assembly of the present invention.

[0026] In the figure: 1, process valve, 2, rectifying device, 2A, inlet component, 3A, gradually reducing conical cavity, 4A, gradually expanding conical cavity, 2B, center component, 3B, conical boss, 4B, arc waist hole, 5B, circular hole, 6B, buffer cavity, 2C, outlet component, 3C circular through hole, 4C, fan-shaped hole. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] like Figure 1 , Figure 2 As shown, a rectifying device for outflow of a process valve comprises a process valve 1, characterized in that a rectifying device 2 is installed at the outlet of the process valve 1, and the rectifying device 2 comprises, from upstream to downstream, an inlet component 2A, a central component 2B and an outlet component 2C.

[0029] like Figure 3 , Figure 4 As shown, the inlet component 2A has a conical cavity 3A at one end close to the process valve 1 and a conical cavity 4A at the other end.

[0030] like Figure 5 , Figure 6 As shown, the central component 2B has a conical boss 3B at one end near the inlet component 2A, and 4 to 6 layers of arc waist holes 4B are radially and equidistantly opened on the bottom surface of the conical boss 3B. 5 to 8 arc waist holes 4B and circular holes 5B are evenly and alternately arranged on the circumference of each layer, and the other end is a buffer cavity 6B.

[0031] like Figure 7 , Figure 8 As shown, the outlet component 2C has a circular through hole 3C at its center, and fan-shaped holes 4C are evenly distributed in the circumferential direction of the outer periphery of the circular through hole 3C.

[0032] like Figure 4 As shown, the tapered cone angle of the tapered conical cavity 3A is α It is 15°~30°.

[0033] like Figure 4 As shown, the gradually expanding cone angle of the gradually expanding conical cavity 4A is β It is 15°~30°.

[0034] like Figure 7As shown, the number of the evenly distributed fan-shaped holes 4C is 20 to 30.

[0035] like Fig. 9 As shown, the extended line of the generatrix of the tapered conical cavity 3A intersects at the vertex of the conical boss 3B.

[0036] The working principle of the present invention is as follows:

[0037] like Figure 1 and Fig. 9 As shown in the figure, in pipeline fluid transportation, the opening adjustment of process valve 1 will cause non-uniform eccentric turbulent flow near its outlet. This non-uniform eccentric turbulent flow ( Fig. 9 The fluid (as indicated by the arrow in the figure) first passes through the tapered conical cavity 3A at the front end of the inlet component 2A of the rectifier 2 of the present invention to converge toward the center of the pipeline. Then, the converged flow collides with the top of the conical boss 3B at the front end of the upper center component 2B, and is evenly dispersed radially along the flow channel between the tapered conical cavity 4A and the conical boss 3B. Since the extension line of the generatrix of the tapered conical cavity 3A intersects at the top of the conical boss 3B, the radial dispersion effect is better after the converged flow collides with the conical boss 3B. Then, the evenly dispersed fluid passes through the arc waist-shaped hole 4B and the circular hole 5B on the periphery of the conical boss 3B for vortex elimination treatment. Since the arc waist-shaped hole 4B and the circular hole 5B are radially distributed in multiple layers, and each layer is evenly staggered, a better vortex elimination effect is achieved while ensuring a larger flow area and reducing flow resistance. The flow after vortex elimination treatment enters the buffer chamber 6B for integration. Finally, through the central circular through hole 3C and the peripheral fan-shaped holes 4C of the outlet component 2C, vortex elimination and integration processing are further better achieved, the turbulent flow is effectively improved, and the final rectification effect is achieved, thereby improving the outlet flow stability of the process valve 1. In addition, the present invention can be used in conjunction with a pipeline fluid measurement device, which is conducive to the stable flow signal acquisition of the pipeline fluid measurement device and improves the measurement accuracy.

Claims

1. A rectifying device for outflow of a process valve, comprising a process valve (1), characterized in that: A rectifying device (2) is installed at the outlet of the process valve (1), and the rectifying device (2) comprises, from upstream to downstream, an inlet component (2A), a central component (2B) and an outlet component (2C); The inlet component (2A) has a converging conical cavity (3A) at one end close to the process valve (1) and a converging conical cavity (4A) at the other end; The central component (2B) has a conical boss (3B) at one end near the inlet component (2A), and the bottom surface of the conical boss (3B) is radially and equidistantly provided with 4 to 6 layers of arc-shaped waist holes (4B), and each layer has 5 to 8 arc-shaped waist holes (4B) and circular holes (5B) evenly and alternately arranged on the circumference, and the other end is a buffer cavity (6B); The outlet component (2C) has a circular through hole (3C) at its center, and fan-shaped holes (4C) are evenly distributed in the circumferential direction of the outer periphery of the circular through hole (3C); The tapered cone angle of the tapered conical cavity (3A) α 15°~30°; The gradually expanding cone angle of the gradually expanding conical cavity (4A) is β It is 15°~30°.

2. The rectifying device for outflow of a process valve according to claim 1, characterized in that: The number of the evenly distributed fan-shaped holes (4C) is 20 to 30.

3. The rectifying device for outflow of a process valve according to claim 1, characterized in that: The extension line of the generatrix of the tapered conical cavity (3A) intersects at the vertex of the conical boss (3B).

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