Anti-smudginess and anti-crystallization heat tracing type conical flow detection device

Abstract

The utility model provides an anti-dirt and anti-crystallization heat tracing type conical flow detection device which comprises a measuring mechanism and a heat tracing mechanism. The measuring mechanism comprises a measuring tube, a throttling cone arranged in the measuring tube, and a positive pressure tapping tube and a negative pressure tapping tube which are arranged on the outer side of the tube wall; the heat tracing mechanism comprises a front heat tracing pipe and a rear heat tracing pipe which are connected to the two ends of the throttling cone, the front heat tracing pipe is connected with a front supporting heat tracing pipe, the rear heat tracing pipe is connected with a rear supporting heat tracing pipe, the front supporting heat tracing pipe and the rear supporting heat tracing pipe are sequentially connected with a steam guide pipe and a soaking ring respectively, and the outer side of the soaking ring is connected with a steam inlet pipe or a steam outlet pipe. According to the device, the two ends of the throttling cone with the hollow structure are connected with the front heat tracing pipe and the rear heat tracing pipe, and steam is guided into the throttling cone, so that the temperature of a fluid medium flowing through the throttling cone is increased, the flowability of the fluid medium is improved, the detection precision of the detection device is improved, and the fluid medium is prevented from forming crystals on the surface of the throttling cone; therefore, the fluid medium is prevented from blocking the positive pressure tapping port and the negative pressure tapping port.

Description

Technical Field

[0001] The utility model relates to the technical field of flow detection, and specifically, to an anti-fouling, anti-crystallization, heat-tracing conical flow detection device. Background Art

[0002] In a conical flow detection device, a throttle cone is arranged inside a measuring tube, so that a pressure difference is generated during the flow of a fluid medium, and a positive pressure tapping tube and a negative pressure tapping tube are used to detect the positive and negative pressures, and flow data is obtained through calculation.

[0003] During the use of the existing conical flow detection device, for fluid media with poor fluidity, the detection accuracy is low, and the fluid medium is likely to form crystals on the surface of the throttle cone, resulting in the blockage of the positive and negative pressure tapping ports when the fluid medium flows through the positive and negative pressure tapping ports, further leading to low measurement accuracy and poor measurement stability. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide an anti-fouling, anti-crystallization, heat-tracing conical flow detection device, which heats the fluid medium to improve the fluidity of the fluid medium, improves the detection accuracy of the detection device, and prevents the fluid medium from forming crystals on the surface of the throttle cone, thereby preventing the blockage of the positive and negative pressure tapping ports when the fluid medium flows through the positive and negative pressure tapping ports.

[0005] The utility model provides an anti-fouling, anti-crystallization, heat-tracing conical flow detection device, including a measuring mechanism and a heat-tracing mechanism, wherein:

[0006] The measuring mechanism includes a measuring tube, a throttle cone is arranged in the middle of the measuring tube, a cavity is arranged inside the throttle cone, the throttle cone is coaxially installed with the measuring tube and there is a gap between the two, positive pressure tapping tube and negative pressure tapping tube are arranged on the outer side wall of the measuring tube, and the positive pressure tapping tube and the negative pressure tapping tube are communicated with the measuring tube;

[0007] The heat-tracing mechanism includes a front heat-tracing pipe and a rear heat-tracing pipe connected to both ends of the throttle cone, a front support heat-tracing pipe is connected to the front heat-tracing pipe, a rear support heat-tracing pipe is connected to the rear heat-tracing pipe, the other ends of the front support heat-tracing pipe and the rear support heat-tracing pipe are respectively communicated with a steam diversion pipe, the steam diversion pipe is installed on the outer wall of the measuring tube, and the other end of it is connected to a heat equalizing ring, and a steam inlet pipe or a steam outlet pipe is connected to the outer side of the heat equalizing ring.

[0008] Preferably, flanges are respectively connected to both ends of the measuring tube.

[0009] Preferably, the throttle cone includes a front half cone and a rear half cone, the included angle between the side wall of the front half cone and its central axis is 20 - 30°, and the included angle between the side wall of the rear half cone and its central axis is 50 - 60°.

[0010] Preferably, the front support tracing pipe and the rear support tracing pipe respectively include a vertical pipe and a group of inclined pipes. The vertical pipe and the group of inclined pipes are connected in a "Y" shape, and the front tracing pipe or the rear tracing pipe is connected at the connection, and the ends of the vertical pipe and the inclined pipe are respectively connected to the inner wall of the measuring pipe.

[0011] Preferably, several connecting columns are provided between the soaking ring and the measuring pipe.

[0012] Preferably, the positive pressure tapping pipe is arranged downstream of the front support tracing pipe, and the negative pressure tapping pipe is arranged downstream of the rear support tracing pipe.

[0013] Working principle of the present invention: The anti-fouling and anti-crystallization tracing type conical flow detection device of the present invention is installed in the pipeline to be measured by using the flange of the measuring pipe. The fluid medium enters from the inlet end of the measuring pipe, passes through the channel between the throttling cone and the measuring pipe, and finally flows out from the outlet end. During this process, the positive pressure tapping pipe and the negative pressure tapping pipe are used to take pressure and detect the fluid medium at both ends of the throttling cone. At the same time, the hot steam enters from the steam inlet pipe, is evenly heated by the soaking ring, and then enters the front support tracing pipe through the steam guide pipe, and then enters the front tracing pipe and the cavity of the throttling cone, heats the conical wall of the throttling cone and then enters the rear tracing pipe, and then passes through the rear support tracing pipe, the steam guide pipe and the soaking ring in turn, and finally is discharged from the steam outlet, so that the steam continuously flows in this tracing system, increasing the heat exchange speed and improving the tracing effect. The fluid medium is heated successively by the front support tracing pipe, the front tracing pipe, the throttling cone, the rear tracing pipe and the rear support tracing pipe during the flow process, which can prevent crystallization in the medium, thereby preventing the fluid medium from blocking the positive and negative pressure tapping ports when flowing through the positive and negative pressure tapping ports. In addition, the vertical pipes and a group of inclined pipes of the front support tracing pipe and the rear support tracing pipe are connected to each other in a "Y" shape, and the connections are respectively welded to the front tracing pipe and the rear tracing pipe, which can not only support the throttling cone, but also evenly heat the fluid medium. Moreover, the vertical pipes and the inclined pipes form a certain angle with the positive pressure tapping pipe and the negative pressure tapping pipe, and will not disturb the fluid at the positive and negative pressure tapping ports, and will not affect the measurement accuracy.

[0014] Beneficial effects of the present invention: The anti-fouling and anti-crystallization tracing type conical flow detection device of the present invention has a hollow throttling cone with the front tracing pipe and the rear tracing pipe connected at both ends. The steam is introduced into the cavity of the throttling cone, and the steam enters the cavity to heat the conical wall of the throttling cone, so that the temperature of the fluid medium flowing through the throttling cone rises, improving the fluidity of the fluid medium, improving the detection accuracy of the detection device, and preventing the fluid medium from forming crystals on the surface of the throttling cone, thereby preventing the fluid medium from blocking the positive and negative pressure tapping ports when flowing through the positive and negative pressure tapping ports. In addition, the detection accuracy of the fluid can be improved by changing the geometric dimensions of the throttling cone. According to the principle of fluid dynamics, by increasing the differential pressure, the detection stability of the flow detection device can be improved. Brief Description of the Drawings

[0015] Figure 1 This is the axial sectional view of the anti-dirtying, anti-crystallization and heat-tracing conical flow detection device of the present utility model;

[0016] Figure 2 is Figure 1 the sectional view along A-A in

[0017] In the figure: measuring mechanism 1, measuring tube 11, throttle cone 12, front half cone 12-1, rear half cone 12-2, positive pressure tapping pipe 13, negative pressure tapping pipe 14, flange 15; heat-tracing mechanism 2, front heat-tracing pipe 21, rear heat-tracing pipe 22, front support heat-tracing pipe 23, rear support heat-tracing pipe 24, steam diversion pipe 25, heat equalizing ring 26, steam inlet pipe 27, steam outlet pipe 28, connecting column 29, vertical pipe a, inclined pipe b. Detailed Embodiments

[0018] In order to make the technical solution of the present utility model easier to understand, the technical solution of the present utility model will be clearly and completely described below by way of specific embodiments in conjunction with the accompanying drawings.

[0019] Embodiment 1:

[0020] As Figure 1 and Figure 2 shown, the anti-dirtying, anti-crystallization and heat-tracing conical flow detection device of this embodiment includes a measuring mechanism 1 and a heat-tracing mechanism 2, wherein:

[0021] The measuring mechanism 1 includes a measuring tube 11, a throttle cone 12 is arranged in the middle of the measuring tube 11, a cavity is arranged inside the throttle cone 12, the throttle cone 12 is coaxially installed with the measuring tube 11 and there is a gap between the two, and a positive pressure tapping pipe 13 and a negative pressure tapping pipe 14 are arranged on the outer wall of the measuring tube 11, and the positive pressure tapping pipe 13 and the negative pressure tapping pipe 14 are communicated with the measuring tube 11;

[0022] The heat-tracing mechanism 2 includes a front heat-tracing pipe 21 and a rear heat-tracing pipe 22 connected to both ends of the throttle cone 12, a front support heat-tracing pipe 23 is connected to the front heat-tracing pipe 21, a rear support heat-tracing pipe 24 is connected to the rear heat-tracing pipe 22, the other ends of the front support heat-tracing pipe 23 and the rear support heat-tracing pipe 24 are respectively communicated with the steam diversion pipe 25, the steam diversion pipe 25 is installed on the outer wall of the measuring tube 11, and the other end thereof is connected to the heat equalizing ring 26, and the outer side of the heat equalizing ring 26 is connected to the steam inlet pipe 27 or the steam outlet pipe 28.

[0023] Embodiment 2:

[0024] As Figure 1 and Figure 2 shown, the anti-dirtying, anti-crystallization and heat-tracing conical flow detection device of this embodiment includes a measuring mechanism 1 and a heat-tracing mechanism 2, wherein:

[0025] The measuring mechanism 1 includes a measuring tube 11. A throttle cone 12 is provided in the middle of the measuring tube 11. A cavity is provided inside the throttle cone 12. The throttle cone 12 is coaxially installed with the measuring tube 11 and there is a gap between the two. A positive pressure tapping pipe 13 and a negative pressure tapping pipe 14 are provided on the outer wall of the pipe wall of the measuring tube 11, and the positive pressure tapping pipe 13 and the negative pressure tapping pipe 14 are communicated with the measuring tube 11. Both ends of the measuring tube 11 are respectively connected to flanges 15. The throttle cone 12 includes a front half cone 12-1 and a rear half cone 12-2. The included angle between the side wall of the front half cone 12-1 and its central axis is 20-30°, and the included angle between the side wall of the rear half cone 12-2 and its central axis is 50-60°.

[0026] The heat tracing mechanism 2 includes a front heat tracing pipe 21 and a rear heat tracing pipe 22 connected to both ends of the throttle cone 12. A front support heat tracing pipe 23 is connected to the front heat tracing pipe 21, and a rear support heat tracing pipe 24 is connected to the rear heat tracing pipe 22. The other ends of the front support heat tracing pipe 23 and the rear support heat tracing pipe 24 are respectively communicated with a steam diversion pipe 25. The steam diversion pipe 25 is installed on the outer wall of the measuring tube 11, and its other end is connected to a heat equalizing ring 26. The outer side of the heat equalizing ring 26 is connected to a steam inlet pipe 27 or a steam outlet pipe 28. Several connecting columns 29 are provided between the heat equalizing ring 26 and the measuring tube 11; the positive pressure tapping pipe 13 is provided downstream of the front support heat tracing pipe 23, and the negative pressure tapping pipe 14 is provided downstream of the rear support heat tracing pipe 24. The front support heat tracing pipe 23 and the rear support heat tracing pipe 24 respectively include a vertical pipe a and a group of inclined pipes b. The vertical pipe a and the group of inclined pipes b are connected in a "Y" shape, and are connected to the front heat tracing pipe 21 or the rear heat tracing pipe 22 at the connection; the ends of the vertical pipe a and the inclined pipe b are respectively connected to the inner wall of the measuring tube 11.

[0027] It should be noted that the embodiments described herein are only partial embodiments of the present invention, rather than all implementation manners of the present invention. The embodiments are only exemplary, and their functions are only to provide a more intuitive and clear way to understand the content of the present invention, rather than a limitation on the technical solutions described in the present invention. Without departing from the concept of the present invention, all other implementation manners that can be thought of by all ordinary technical personnel in the art without creative labor, as well as other simple replacements and various changes to the technical solutions of the present invention, all belong to the protection scope of the present invention.

Claims

1. A conical flow detection device with anti-fouling and anti-crystallization heat tracing, characterized in that: It comprises a measuring mechanism (1) and a heating mechanism (2), wherein: The measuring mechanism (1) comprises a measuring tube (11), a throttling cone (12) is provided in the middle of the measuring tube (11), a cavity is provided inside the throttling cone (12), the throttling cone (12) and the measuring tube (11) are coaxially mounted with a gap therebetween, a positive pressure taking tube (13) and a negative pressure taking tube (14) are provided on the outer side of the tube wall of the measuring tube (11), and the positive pressure taking tube (13) and the negative pressure taking tube (14) are connected to the measuring tube (11); The heating mechanism (2) comprises a front heating pipe (21) and a rear heating pipe (22) connected to the two ends of the throttling cone (12); the front heating pipe (21) is connected to a front support heating pipe (23); the rear heating pipe (22) is connected to a rear support heating pipe (24); the other ends of the front support heating pipe (23) and the rear support heating pipe (24) are respectively connected to a steam guide pipe (25); the steam guide pipe (25) is installed on the outer wall of the measuring tube (11); the other end of the steam guide pipe (25) is connected to a heat equalizing ring (26); the outer side of the heat equalizing ring (26) is connected to a steam inlet pipe (27) or a steam outlet pipe (28).

2. The anti-fouling and anti-crystallization heating type conical flow detection device according to claim 1 is characterized in that: Both ends of the measuring tube (11) are respectively connected to flanges (15).

3. The anti-fouling and anti-crystallization heated cone flow detection device according to claim 1, characterized in that: The throttling cone (12) comprises a front half cone (12-1) and a rear half cone (12-2); the angle between the side wall of the front half cone (12-1) and its central axis is 20 to 30 degrees, and the angle between the side wall of the rear half cone (12-2) and its central axis is 50 to 60 degrees.

4. The anti-fouling and anti-crystallization heated cone flow detection device according to claim 1, characterized in that: The front support heating pipe (23) and the rear support heating pipe (24) respectively comprise a vertical pipe (a) and a group of inclined pipes (b); the vertical pipe (a) and the group of inclined pipes (b) are connected in a "Y" shape and are connected to the front heating pipe (21) or the rear heating pipe (22) at the connection point; the ends of the vertical pipe (a) and the inclined pipe (b) are respectively connected to the inner wall of the measuring pipe (11).

5. The anti-fouling and anti-crystallization heated cone flow detection device according to claim 1, characterized in that: A plurality of connecting columns (29) are provided between the heat-saturating ring (26) and the measuring tube (11).

6. The anti-fouling and anti-crystallization heating type conical flow detection device according to claim 1, characterized in that: The positive pressure taking pipe (13) is arranged downstream of the front support heating pipe (23), and the negative pressure taking pipe (14) is arranged downstream of the rear support heating pipe (24).

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