CN116183544A - Small-flow high-precision infrared leakage monitor - Google Patents

Abstract

The application relates to a low-flow high-precision infrared leakage monitor, which comprises a monitoring cylinder, wherein an infrared detection piece is arranged on the inner wall of the monitoring cylinder, a plurality of reflection angles are arranged on the inner wall of the monitoring cylinder, the reflection angles are distributed along the circumferential direction of the monitoring cylinder, each reflection angle comprises a first reflection surface, and the first reflection surfaces are used for reflecting infrared radiation to the position of the infrared detection piece when liquid drops move to the position corresponding to the infrared detection piece; this application has the advantage of realizing accurate monitoring when the leakage amount is little.

Description

A Small Flow High Precision Infrared Leak Monitor

technical field

The present application relates to the field of seal leakage detection, in particular to a small-flow high-precision infrared leakage monitor.

Background technique

The mechanical seal is a shaft seal device that relies on a pair or several pairs of end faces that are perpendicular to the shaft to slide relative to each other under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism and is matched with auxiliary seals to achieve leakage prevention. The shaft seal device is usually equipped with a collection pipeline for collecting leakage liquid, and in order to monitor whether leakage occurs, an infrared probe is usually installed on the leakage liquid collection pipeline for monitoring, but when the leakage is small , when the liquid droplet flows to the position where the infrared probe is located, the liquid droplet will lose part of the heat, resulting in the inability of the infrared probe to accurately monitor when the leakage is small.

Contents of the invention

In order to realize accurate monitoring when the leakage is small, the application provides a small flow and high-precision infrared leakage monitor.

A small-flow high-precision infrared leak monitor provided by this application adopts the following technical scheme:

A low-flow high-precision infrared leakage monitor, including a monitoring tube, the inner wall of the monitoring tube is provided with infrared detection parts, the inner wall of the monitoring tube is provided with a plurality of reflection angles, and the plurality of reflection angles are monitored along the The circumferential distribution of the cylinder, each of the reflection angles includes a first reflection surface, and a plurality of the first reflection surfaces are used to reflect the infrared radiation to the infrared when the liquid drop moves to a position relative to the infrared detection element. The location of the probe.

By adopting the above technical solution and adopting the arrangement of multiple first reflective surfaces, when the liquid droplet moves to the position where the infrared detection element is located, the multiple first reflective surfaces can reflect the infrared radiation emitted by the liquid droplet in different directions along the horizontal direction To the position where the infrared detection part is located, so that the infrared detection part can further receive more infrared radiation and improve the accuracy of the infrared detection part in the case of small flow. The radiation is reflected to the position where the infrared detection element is located, so that the infrared detection element can further detect the leak, and by improving the detection accuracy, it is convenient to more accurately realize the calculation of the leakage amount.

Optionally, the infrared detection element includes an infrared temperature sensing probe, and the infrared temperature sensing probe is penetrated and fixedly connected to the middle of the side wall of the monitoring cylinder.

By adopting the above-mentioned technical scheme, the setting of the infrared temperature-sensing probe is convenient to improve the detection sensitivity of the infrared radiation of the droplet, and the infrared temperature-sensing probe is arranged in the middle of the monitoring cylinder, so that each first reflecting surface can reflect the infrared radiation to the infrared sensor. The location of the temperature probe.

Optionally, the plurality of reflection angles on one side of the infrared temperature sensing probe are arranged symmetrically to the plurality of reflection angles on the other side, and the axis of the infrared temperature sensing probe is symmetrical to the axes of symmetry of the plurality of reflection angles on both sides. coincide.

By adopting the above-mentioned technical solution, it is convenient to manufacture multiple reflection angles, and drives multiple first reflection surfaces symmetrical on both sides to better reflect infrared radiation to the position where the infrared temperature sensing probe is located, further improving the infrared temperature sensing Sensitivity of the probe.

Optionally, the line-plane angles between the plurality of first reflecting surfaces and the axis of the infrared temperature sensing probe are sequentially set as a ₁ -a _n along the direction close to the infrared temperature sensing probe, where n≥2, a _n -a _n-1 =m, where m=10°-15°, a ₁ =90°.

By adopting the above-mentioned technical scheme, the line-plane angle difference between the adjacent first reflective surface and the axis of the infrared temperature sensing probe is set between 10° and 15°, so that the droplets rely on the first reflection angle of different angles. The reflective surface better reflects the infrared radiation to the position where the infrared temperature sensing probe is located, thereby further improving the detection sensitivity of the infrared temperature sensing probe.

Optionally, the first reflective surface includes a plurality of second reflective surfaces, the plurality of second reflective surfaces are distributed along the axial direction of the monitoring cylinder, and the plurality of second reflective surfaces are used for when the liquid droplets move to the opposite When at the position where the infrared detection part is located, the infrared radiation is reflected to the position where the infrared detection part is located.

By adopting the above technical solution and adopting the arrangement of multiple second reflective surfaces, when the liquid droplet moves to the position where the infrared detection element is located, the multiple second reflective surfaces can direct the liquid droplet toward the infrared radiation emitted in different directions along the vertical direction. Reflected to the position where the infrared detection element is located, so that the infrared detection element can further receive more infrared radiation, and with the arrangement of multiple first reflecting surfaces, the accuracy of the infrared detection element in the case of small flow is further improved.

Optionally, the plurality of second reflecting surfaces are arranged symmetrically on the upper and lower parts of the infrared temperature sensing probe, and the axes of the infrared temperature sensing probe coincide with the symmetry axes of the plurality of second reflecting surfaces.

By adopting the above technical solution, it is convenient to manufacture multiple second reflective surfaces, and the upper and lower symmetrical first reflective surfaces are driven to better reflect infrared radiation to the position where the infrared temperature sensing probe is located, further improving the The sensitivity of the infrared temperature sensor.

Optionally, the line-plane angle between the plurality of second reflecting surfaces and the axis of the infrared temperature sensing probe is sequentially set to b ₁ -b _k along the direction close to the infrared temperature sensing probe, where k≥2, b _k -b _k-1 =i, where i=3°, b ₁ =54°.

By adopting the above-mentioned technical scheme, the line-plane angle difference between the adjacent second reflective surface and the axis of the monitoring cylinder is set at 3°, so that the liquid droplets can better reflect infrared radiation by relying on the second reflective surface with different angles to the position where the infrared temperature sensing probe is located, thereby further improving the detection sensitivity of the infrared temperature sensing probe.

Optionally, the small-flow high-precision infrared leakage monitor also includes a leakage liquid collection pipeline arranged on the shaft seal device, the monitoring cylinder is detachably connected to the leakage liquid collection pipeline, and the leakage liquid collection pipeline is set There is a droplet forming member for driving the leakage liquid to drop in the monitoring cylinder in a drop shape.

By adopting the above technical solution, when the amount of leakage is small, the droplet forming member can make the liquid form into droplets and drip down along the monitoring cylinder, preventing the liquid droplets from flowing along the inner wall of the monitoring cylinder, so as to facilitate the driving of multiple first reflective surfaces and A plurality of second reflective surfaces reflect the infrared radiation of the liquid droplets, thereby further improving the accuracy of the infrared temperature sensing probe; the monitoring cylinder is detachably connected to the leakage liquid collection pipeline, which facilitates the installation and disassembly of the monitoring cylinder , to facilitate the cleaning of the inner wall of the monitoring cylinder.

Optionally, the droplet forming member includes a droplet pipe spirally arranged in the leakage liquid collection pipe along the length direction of the leakage liquid collection pipe, and one end of the spiral droplet pipe is fixedly arranged on the inner wall of the monitoring cylinder, The other end is located in the middle of the monitoring cylinder.

By adopting the above technical scheme, the spiral drop tube can receive the leakage liquid flowing down the leakage liquid collection pipeline and the leakage liquid falling in the leakage liquid collection pipeline, and the leakage liquid flows along the spiral drop tube Move, move to the end of the spiral drop tube, so as to form droplets to drop down, so as to prevent the droplets from flowing down the side wall of the leakage liquid collection pipeline, resulting in inaccurate detection, and by driving the liquid The drop falls in the middle of the monitoring tube, which indirectly improves the reflection effect of the multiple first reflective surfaces and multiple second reflective surfaces reflecting the infrared radiation emitted by the droplet to the position of the infrared temperature sensing probe.

Optionally, the section of the helical dropper is arranged in a semicircular arc shape.

By adopting the above technical scheme, when the leakage is large, the leakage liquid can directly flow down the semi-circular drop tube, preventing the helical drop tube from clogging the monitoring tube due to the large leakage. When it is large, discharge the leakage liquid in time.

In summary, the present application includes at least one of the following beneficial technical effects:

1. With the arrangement of multiple first reflective surfaces, when the droplet moves to the position where the infrared detector is located, the multiple first reflective surfaces can reflect the infrared radiation emitted by the droplet in different directions to the infrared detector along the horizontal direction position, so that the infrared detection part can further receive more infrared radiation, which improves the accuracy of the infrared detection part in the case of small flow. When the droplet loses some heat, it reflects as much infrared radiation as possible The position of the detection part, so that the infrared detection part can further detect the leak, and by improving the detection accuracy, it is convenient to realize the calculation of the leakage amount more accurately;

2. With the arrangement of multiple second reflective surfaces, when the droplet moves to the position where the infrared detector is located, the multiple second reflective surfaces can reflect the infrared radiation emitted by the droplet in different directions along the vertical direction to the infrared detector The position of the infrared detection element can be adjusted, so that the infrared detection element can further receive more infrared radiation, and with the arrangement of multiple first reflective surfaces, the accuracy of the infrared detection element in the case of small flow is further improved;

3. When the leakage is small, the droplet forming member can make the liquid form droplets and drip down along the monitoring cylinder, preventing the liquid droplets from flowing along the inner wall of the monitoring cylinder, so as to facilitate the driving of multiple first reflective surfaces and multiple second reflection surfaces. The reflective surface realizes the reflection of the infrared radiation of the liquid droplets, thereby further improving the accuracy of the infrared temperature sensing probe; the monitoring cylinder is detachably connected to the leakage liquid collection pipeline, so as to facilitate the installation and disassembly of the monitoring cylinder, and facilitate the realization of Monitor the cleaning of the inner wall of the cylinder.

Description of drawings

Fig. 1 is a schematic diagram of a half-section structure of a monitoring tube of an embodiment of the present application;

Fig. 2 is a schematic cross-sectional structure diagram for showing the reflection angle of an embodiment of the present application;

Fig. 3 is a schematic cross-sectional structure diagram for showing a second reflective surface according to an embodiment of the present application;

Fig. 4 is a schematic structural view of the leakage liquid collection pipeline and the monitoring cylinder of the embodiment of the present application;

Fig. 5 is a schematic structural view for showing a liquid dropper, a leakage liquid collection pipeline and a monitoring cylinder according to an embodiment of the present application;

Fig. 6 is a schematic structural diagram for showing a dropper according to an embodiment of the present application;

FIG. 7 is a schematic diagram of a half-section structure for showing a first reflective surface and a second reflective surface according to an embodiment of the present application.

Description of reference signs: 1. Monitoring cylinder; 11. Infrared temperature sensing probe; 12. Reflection angle; 121. First reflecting surface; 122. Forming surface; 13. Second reflecting surface; 14. Leakage liquid collection pipeline; 141 . Dropper tube; 142. Tube body.

Detailed ways

The present application will be described in further detail below in conjunction with accompanying drawings 1-7.

The embodiment of the present application discloses a small-flow high-precision infrared leakage monitor. Referring to Fig. 1, a small flow rate high-precision infrared leakage detector includes a monitoring cylinder 1, the monitoring cylinder 1 is made of stainless steel as a whole, the length of the monitoring cylinder 1 is 100 mm, and the outer diameter is 36 mm. Circular arrangement, the inner wall of the monitoring cylinder 1 is provided with an infrared detection element, the infrared detection element includes an infrared temperature sensing probe 11, the infrared temperature sensing probe 11 is penetrated and fixedly connected to the middle part of the side wall of the monitoring cylinder 1, and the infrared temperature sensing probe 11 It is arranged in a cylindrical shape, and the axis of the cylindrical infrared temperature sensing probe 11 intersects and is perpendicular to the axis of the monitoring cylinder 1 .

1 and 2, the inner wall of the monitoring cylinder 1 is provided with a plurality of reflection angles 12, and the plurality of reflection angles 12 are distributed along the circumference of the monitoring cylinder 1. The multiple reflection angles 12 on one side are arranged symmetrically, and the axis of the infrared temperature sensing probe 11 coincides with the symmetry axes of the multiple reflection angles 12 on both sides.

1 and 2, each reflection angle 12 includes a first reflection surface 121. In this embodiment, each reflection surface also includes a molding surface 122 connected to the first reflection surface 121. In practice, the reflection angle 12 During processing, the stainless steel plate is firstly taken, and different molds are used to stamp different reflection angles 12 on the stainless steel plate through a punching machine. At this time, the reflection angle 12 will form the first reflection surface 121 and the forming surface 122, and the two sides of the stainless steel plate will be The edges are fixed together to form the monitoring cylinder 1, and a plurality of first reflective surfaces 121 are used to reflect infrared radiation to the position of the infrared detection element when the liquid drop moves to the position relative to the infrared detection element. The surface 122 is produced during stamping, but in this application, when the infrared radiation emitted by the liquid droplets hits the forming surface 122, it can be reflected along the forming surface 122 to other first reflecting surfaces 121, along the first reflective surface 121 A reflective surface 121 can be reflected to the position where the infrared temperature sensing probe 11 is located, so that part of the infrared radiation can still be reflected.

1 and 2, in order to further improve the reflection effect of the first reflective surface 121 on the infrared radiation of the droplets, the angle between the line and plane between the multiple first reflective surfaces 121 and the axis of the infrared temperature sensing probe 11 is along the direction close to the infrared sensor. The direction of the temperature probe 11 is sequentially set as a ₁ -a _n , where n≥2, a _n -a _n-1 =m, where m=10°-15°, a ₁ =90°; in this embodiment, n=10, there are 20 first reflecting surfaces 121 and 20 forming surfaces 122 along the circumference of the monitoring cylinder 1, and the farthest line between the first reflecting surface 121 of the infrared temperature sensing probe 11 and the axis of the infrared temperature sensing probe 11 The plane angle a1 is 90°, and the line-plane angle a10 between the first reflective surface 121 closest to the infrared temperature sensing probe 11 and the axis of the infrared temperature sensing probe ₁₁ is -12°.

1 and FIG. 3, the first reflective surface 121 includes a plurality of second reflective surfaces 13, the plurality of second reflective surfaces 13 are distributed along the axial direction of the monitoring cylinder 1, and the plurality of second reflective surfaces 13 are located on the infrared temperature sensing probe 11 The upper part and the lower part are arranged symmetrically, and the axis of the infrared temperature sensing probe 11 coincides with the symmetrical axes of the plurality of second reflective surfaces 13; Stamping forming of the reflective surface 13, after the stamping and forming of multiple first reflective surfaces 121 and multiple second reflective surfaces 13, the edges on both sides of the stainless steel plate are fixed together by welding or other fixing methods to form the monitoring tube 1 The plurality of second reflective surfaces 13 are used to reflect infrared radiation to the position where the infrared detection element is located when the liquid drop moves to a position relative to the infrared detection element.

1 and 3, the line-plane angles between multiple second reflective surfaces 13 and the axis of the infrared temperature sensing probe 11 are sequentially set as b ₁ -b _k along the direction close to the infrared temperature sensing probe 11, where k≥ 2, b _k -b _k-1 =i, where i=3°, b ₁ =54°; in this embodiment, k=12, each first reflective surface 121 includes 24 second reflective surfaces 13 , the 12 second reflecting surfaces 13 on the upper part of the infrared temperature sensing probe 11 are arranged symmetrically with the 12 second reflecting surfaces 13 on the lower part, and the distance between the second reflecting surface 13 farthest from the infrared temperature sensing probe 11 and the axis of the monitoring tube 1 The line-plane angle _b1 is 54°, and the line-plane angle _b12 between the second reflective surface 13 closest to the infrared temperature sensing probe 11 and the axis of the monitoring tube 1 is 90°.

As shown in Figure 4, the small-flow high-precision infrared leakage monitor also includes a leakage liquid collection pipeline 14 arranged on the shaft seal device, and the monitoring cylinder 1 is detachably connected to the leakage liquid collection pipeline 14. In this embodiment , the monitoring cylinder 1 is threadedly connected to the leakage liquid collection pipeline 14 and is located close to the shaft seal device, thereby preventing more heat loss due to the excessively long flow path of the liquid droplets, and it is convenient to realize monitoring of the monitoring cylinder after the monitoring cylinder 1 is removed. 1 for cleaning and replacement.

4 and 5, in order to drive the leakage liquid flowing down in the leakage liquid collection pipeline 14 to drop along the middle part of the monitoring cylinder 1, the leakage liquid collection pipeline 14 is provided with a device for driving the leakage liquid in a drop shape. The dripping droplet formers in the cartridge 1 were monitored. The droplet forming member includes a droplet tube 141 spirally arranged in the leakage liquid collection line 14 along the length direction of the leakage liquid collection line 14, one end of the spiral droplet tube 141 is fixedly arranged on the inner wall of the monitoring cylinder 1, and the other One end is located in the middle of the monitoring cylinder 1; in order to prevent the liquid drop tube 141 from affecting the leakage when the leakage is too large, the section of the spiral drop tube 141 is set in a semicircular arc shape.

5 and 6, in this embodiment, the spiral drop tube 141 does not overlap along the axial direction of the monitoring tube, and the projected area of the drop tube 141 along the axial direction of the monitoring tube 1 is the same as the cross-section of the inner wall of the monitoring tube 1 The areas are the same, so that the leakage liquid flowing down the inner wall of the leakage liquid collection line 14 and falling in the leakage liquid collection line 14 can flow into the drop tube 141, thereby forming a droplet and falling along the middle of the monitoring cylinder 1 , in order to prevent the deviation of the drop path of the drop tube 141, the end of the drop tube 141 located in the monitoring cylinder 1 is provided with a tube body 142, the tube body 142 coincides with the axis of the monitoring tube 1 and communicates with the drop tube 141 The cross-section of the pipe body 142 is arranged in a circular shape.

The implementation principle of a low-flow high-precision infrared leak monitor in the embodiment of the present application is: when a small-flow leak occurs, the leaked liquid flows down the inner wall of the leaked liquid collection pipeline 14 and flows to the spiral dropper 141 Inside, it flows into the tube body 142 along the helical drop tube 141, forms a droplet along the end of the tube body 142, and when the droplet moves to the position where the infrared temperature sensing probe 11 is located, multiple first A reflective surface 121 and a plurality of second reflective surfaces 13 reflect the infrared radiation of the liquid droplets (see FIG. 7 ), so as to realize accurate monitoring of small flow leakage, and when the leakage becomes smaller and larger (specifically, Seal leakage changes from "drip" state to "line leakage" state), relying on multiple first reflective surfaces 121 and multiple second reflective surfaces 13 can more accurately realize the monitoring and calculation of leakage, which is convenient for monitoring personnel to judge leakage The size of the amount, and when the amount of leakage is large, the leakage liquid will overflow the semi-arc-shaped dropper 141 to prevent blockage when the amount of leakage is large.

All of the above are preferred embodiments of the application, and are not intended to limit the protection scope of the application. Therefore, all equivalent changes made according to the structure, shape, and principle of the application should be covered by the protection scope of the application. Inside.

Claims (10)

1. A low-flow high-precision infrared leakage monitor is characterized in that: including monitoring section of thick bamboo (1), be provided with infrared detection spare on the inner wall of monitoring section of thick bamboo (1), be provided with a plurality of reflection angles (12) on the inner wall of monitoring section of thick bamboo (1), a plurality of reflection angle (12) are along the hoop distribution of monitoring section of thick bamboo (1), every reflection angle (12) all include first reflecting surface (121), a plurality of first reflecting surface (121) are used for when the liquid droplet removes to the position that is located for infrared detection spare, reflect infrared radiation to the position that infrared detection spare is located.

2. The low-flow high-precision infrared leakage monitor as claimed in claim 1, wherein: the infrared detection piece comprises an infrared temperature sensing probe (11), and the infrared temperature sensing probe (11) is arranged in a penetrating mode and fixedly connected to the middle of the side wall of the monitoring cylinder (1).

3. The low-flow high-precision infrared leakage monitor as claimed in claim 2, wherein: the infrared temperature sensing probe is characterized in that a plurality of reflection angles (12) on one side of the infrared temperature sensing probe (11) and a plurality of reflection angles (12) on the other side are symmetrically arranged, and the axis of the infrared temperature sensing probe (11) coincides with the symmetry axes of the reflection angles (12) on the two sides.

4. A low flow high precision infrared according to claim 3Leakage monitor, its characterized in that: the line-surface included angles between the first reflecting surfaces (121) and the axes of the infrared temperature sensing probes (11) are sequentially set as a along the direction close to the near infrared temperature sensing probes (11) ₁ -a _n Wherein n.gtoreq.2, a _n -a _n-1 M, where m=10° -15 °, a ₁ =90°。

5. The low-flow high-precision infrared leakage monitor as claimed in claim 2, wherein: the first reflecting surface (121) comprises a plurality of second reflecting surfaces (13), the second reflecting surfaces (13) are distributed along the axial direction of the monitoring cylinder (1), and the second reflecting surfaces (13) are used for reflecting infrared radiation to the position of the infrared detection piece when the liquid drop moves to the position relative to the infrared detection piece.

6. The low-flow high-precision infrared leakage monitor as defined in claim 5, wherein: the second reflecting surfaces (13) are symmetrically arranged at the upper part and the lower part of the infrared temperature sensing probe (11), and the axis of the infrared temperature sensing probe (11) coincides with the symmetry axis of the second reflecting surfaces (13).

7. The low-flow high-precision infrared leakage monitor as defined in claim 6, wherein: the line-surface included angles between the second reflecting surfaces (13) and the axes of the infrared temperature sensing probes (11) are sequentially set as b along the direction close to the near infrared temperature sensing probes (11) ₁ -b _k Wherein k.gtoreq.2, b _k -b _k-1 I=3 °, b ₁ =54°。

8. The low flow high accuracy infrared leakage monitor according to any one of claims 1-7, wherein: the low-flow high-precision infrared leakage monitor further comprises a leakage liquid collecting pipeline (14) arranged on the shaft seal device, the monitoring cylinder (1) is detachably connected to the leakage liquid collecting pipeline (14), and a liquid drop forming piece used for driving leakage liquid to drop in the monitoring cylinder (1) is arranged in the leakage liquid collecting pipeline (14).

9. The low-flow high-precision infrared leakage monitor as defined in claim 8, wherein: the liquid drop forming piece comprises a liquid drop pipe (141) which is spirally arranged in the leakage liquid collecting pipeline (14) along the length direction of the leakage liquid collecting pipeline (14), one end of the spiral liquid drop pipe (141) is fixedly arranged on the inner wall of the monitoring cylinder (1), and the other end of the spiral liquid drop pipe is positioned in the middle of the monitoring cylinder (1).

10. The low flow high accuracy infrared leakage monitor as defined in claim 9, wherein: the cross section of the spiral liquid drop tube (141) is arranged in a semicircular arc shape.

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