A small-flow high-precision infrared leakage monitor

Abstract

This application relates to a small-flow high-precision infrared leakage monitor, which includes a monitoring cylinder. An infrared detector 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, and the plurality of reflection angles are distributed circumferentially along the monitoring cylinder. Each of the reflection angles includes a first reflection surface, and the plurality of first reflection surfaces are used to reflect infrared radiation to the position where the infrared detector is located when the liquid droplet moves to a position relative to the infrared detector. This application has the advantage of achieving precise monitoring when the leakage amount is small.

Description

Technical Field

[0001] This application relates to the field of seal leakage detection, and particularly to a small-flow high-precision infrared leakage monitor. Background Art

[0002] A mechanical seal is a shaft seal device that relies on a pair or several pairs of end faces perpendicular to the shaft and sliding relative to each other to maintain contact under the action of fluid pressure and the elastic force (or magnetic force) of a compensation mechanism, and is equipped with an auxiliary seal to achieve leakage prevention. Existing shaft seal devices usually have a collection pipeline adapted to collect leakage liquid, and in order to monitor whether leakage occurs, an infrared probe is usually arranged on the collection pipeline of the leakage liquid for monitoring. However, when the leakage amount is small, when the liquid droplet flows to the position where the infrared probe is located, the liquid droplet will lose part of its heat, resulting in the inability of the infrared probe to accurately monitor when the leakage amount is small. Summary of the Invention

[0003] In order to achieve accurate monitoring when the leakage amount is small, this application provides a small-flow high-precision infrared leakage monitor.

[0004] A small-flow high-precision infrared leakage monitor provided by this application adopts the following technical solutions:

[0005] A small-flow high-precision infrared leakage monitor includes a monitoring cylinder, an infrared detection member 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 plurality of reflection angles are distributed along the circumferential direction of the monitoring cylinder, each reflection angle includes a first reflection surface, and the plurality of first reflection surfaces are used to reflect infrared radiation to the position where the infrared detection member is located when the liquid droplet moves to the position relative to the infrared detection member.

[0006] By adopting the above technical solutions, with the arrangement of a plurality of first reflection surfaces, when the liquid droplet moves to the position where the infrared detection member is located, the plurality of first reflection surfaces can reflect the infrared radiation emitted by the liquid droplet in different directions horizontally to the position where the infrared detection member is located, so that the infrared detection member can further receive more infrared radiation, improving the accuracy of the infrared detection member in the case of small flow. When the liquid droplet loses part of its heat, by reflecting as much infrared radiation as possible to the position where the infrared detection member is located, the infrared detection member can further detect leakage, and by improving the detection accuracy, it is convenient to more accurately calculate the leakage amount.

[0007] Optionally, the infrared detection member includes an infrared temperature sensor probe, and the infrared temperature sensor probe penetrates and is fixedly connected to the middle of the side wall of the monitoring cylinder.

[0008] By adopting the above technical solution, the setting of the infrared temperature sensor probe facilitates improving the detection sensitivity of the infrared radiation of the droplet. The infrared temperature sensor probe is arranged in the middle of the monitoring cylinder, which facilitates reflecting the infrared radiation to the position where the infrared temperature sensor probe is located by each first reflecting surface.

[0009] Optionally, a plurality of reflection angles on one side of the infrared temperature sensor probe are symmetrically arranged with a plurality of reflection angles on the other side, and the axis of the infrared temperature sensor probe coincides with the symmetry axis of the plurality of reflection angles on both sides.

[0010] By adopting the above technical solution, it is convenient to manufacture a plurality of reflection angles, and drives the plurality of first reflecting surfaces on both sides to better reflect the infrared radiation to the position where the infrared temperature sensor probe is located, further improving the sensitivity of the infrared temperature sensor probe.

[0011] Optionally, the linear-plane angles between the plurality of first reflecting surfaces and the axis of the infrared temperature sensor probe are sequentially set as a1 - an along the direction close to the infrared temperature sensor probe n , where n≥2, an n - a n-1 =m, where m = 10° - 15°, and a1 = 90°.

[0012] By adopting the above technical solution, the difference between the linear-plane angles of adjacent first reflecting surfaces and the axis of the infrared temperature sensor probe is set between 10° and 15°, so that the droplet can better reflect the infrared radiation to the position where the infrared temperature sensor probe is located by the first reflecting surfaces with different angle reflection angles, thereby further improving the detection sensitivity of the infrared temperature sensor probe.

[0013] Optionally, the first reflecting surface includes a plurality of second reflecting surfaces, and the plurality of second reflecting surfaces are distributed along the axial direction of the monitoring cylinder. The plurality of second reflecting surfaces are used to reflect the infrared radiation to the position where the infrared detecting element is located when the droplet moves to the position relative to the infrared detecting element.

[0014] By adopting the above technical solution, with the setting of a plurality of second reflecting surfaces, when the droplet moves to the position where the infrared detecting element is located, the plurality of second reflecting surfaces can reflect the infrared radiation emitted by the droplet in different directions to the position where the infrared detecting element is located along the vertical direction, so that the infrared detecting element can further receive more infrared radiation. Combined with the setting of the plurality of first reflecting surfaces, the accuracy of the infrared detecting element in the case of small flow rate is further improved.

[0015] Optionally, the plurality of second reflecting surfaces are symmetrically arranged above and below the infrared temperature sensor probe, and the axis of the infrared temperature sensor probe coincides with the symmetry axis of the plurality of second reflecting surfaces.

[0016] By adopting the above technical solution, it is convenient to manufacture multiple second reflecting surfaces, and drive multiple first reflecting surfaces that are symmetric in the upper and lower parts to better reflect infrared radiation to the position where the infrared temperature sensor probe is located, further improving the sensitivity of the infrared temperature sensor probe.

[0017] Optionally, the linear surface angles between multiple said second reflecting surfaces and the axis of the infrared temperature sensor probe are sequentially set as b1 - b along the direction approaching the infrared temperature sensor probe k , where k≥2, b k -b k-1 =i, where i = 3°, b1 = 54°.

[0018] By adopting the above technical solution, the difference in the linear surface angles between adjacent second reflecting surfaces and the axis of the monitoring cylinder is set at 3°, enabling the liquid droplets to better reflect infrared radiation to the position where the infrared temperature sensor probe is located by means of second reflecting surfaces at different angles, thereby further improving the detection sensitivity of the infrared temperature sensor probe.

[0019] Optionally, the small-flow high-precision infrared leakage monitor further 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 a liquid droplet forming member for driving the leakage liquid to be in a droplet shape and drop inside the monitoring cylinder is arranged in the leakage liquid collection pipeline.

[0020] By adopting the above technical solution, when the leakage amount is small, the liquid droplet forming member can make the liquid form droplets and drip along the monitoring cylinder, preventing the liquid droplets from flowing along the inner wall of the monitoring cylinder, thereby facilitating driving multiple first reflecting surfaces and multiple second reflecting surfaces to reflect the infrared radiation of the liquid droplets, and further improving the accuracy of the infrared temperature sensor probe; the monitoring cylinder is detachably connected to the leakage liquid collection pipeline, thus facilitating the installation and disassembly of the monitoring cylinder and the cleaning of the inner wall of the monitoring cylinder.

[0021] Optionally, the liquid droplet forming member includes a liquid droplet pipe spirally arranged in the leakage liquid collection pipeline along the length direction of the leakage liquid collection pipeline, one end of the spiral liquid droplet pipe is fixedly arranged on the inner wall of the monitoring cylinder, and the other end is located in the middle of the monitoring cylinder.

[0022] By adopting the above technical solution, the spiral liquid droplet pipe can receive the leakage liquid flowing down along the leakage liquid collection pipeline and the leakage liquid falling inside the leakage liquid collection pipeline. The leakage liquid moves along the spiral liquid droplet pipe and reaches the outermost end of the spiral liquid droplet pipe, thus forming liquid droplets that drip down, thereby preventing the liquid droplets from flowing down along the side wall of the leakage liquid collection pipeline and resulting in inaccurate detection, and indirectly improving the reflection effect of multiple first reflecting surfaces and multiple second reflecting surfaces in reflecting the infrared radiation emitted by the liquid droplets to the position where the infrared temperature sensor probe is located by driving the liquid droplets to fall in the middle of the monitoring cylinder.

[0023] Optionally, the cross-section of the spiral dropper is arranged in a semicircular arc shape.

[0024] By adopting the above technical solution, when the leakage amount is large, the leaked liquid can flow directly over the semicircular dropper, preventing the spiral dropper from clogging the monitoring tube due to the large leakage amount, making it easier to discharge the leaked liquid in time when the leakage amount is large.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. By adopting the setting of multiple first reflection surfaces, when the droplet moves to the position where the infrared detection element is located, the multiple first reflection surfaces can reflect the infrared radiation emitted by the droplet in different directions to the position where the infrared detection element is located in the horizontal direction, so that the infrared detection element can further receive more infrared radiation, and improve the accuracy of the infrared detection element under the condition of small flow. When the droplet loses part of the heat, by reflecting as much infrared radiation as possible to the position where the infrared detection element is located, the infrared detection element can further detect the leakage, and by improving the detection accuracy, it is convenient to calculate the leakage amount more accurately;

[0027] 2. By adopting the setting of multiple second reflection surfaces, when the droplet moves to the position where the infrared detection element is located, the multiple second reflection surfaces can reflect the infrared radiation emitted by the droplet in different directions to the position where the infrared detection element is located in the vertical direction, so that the infrared detection element can further receive more infrared radiation. In combination with the setting of multiple first reflection surfaces, the accuracy of the infrared detection element in the case of small flow is further improved;

[0028] 3. When the leakage amount is small, the droplet forming member can make the liquid form droplets and drip along the monitoring tube, preventing the droplets from flowing along the inner wall of the monitoring tube, thereby facilitating the reflection of the infrared radiation of the droplets by the multiple first reflection surfaces and the multiple second reflection surfaces, thereby further improving the accuracy of the infrared temperature sensing probe; the monitoring tube is detachably connected to the leakage liquid collection pipeline, thereby facilitating the installation and disassembly of the monitoring tube and the cleaning of the inner wall of the monitoring tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of a half-section structure of a monitoring tube according to an embodiment of the present application;

[0030] Figure 2 is a schematic cross-sectional structure diagram for illustrating the reflection angle of an embodiment of the present application;

[0031] Figure 3 is a schematic cross-sectional structure diagram for showing the second reflective surface in an embodiment of the present application;

[0032] Figure 4 It is a schematic structural diagram of the leakage liquid collection pipeline and the monitoring cylinder of the embodiment of the present application;

[0033] Figure 5 It is a schematic structural diagram for showing the liquid dropping pipe, the leakage liquid collection pipeline and the monitoring cylinder of the embodiment of the present application;

[0034] Figure 6 It is a schematic structural diagram for showing the liquid dropping pipe of the embodiment of the present application;

[0035] Figure 7 It is a schematic half-sectional structural diagram for showing the first reflecting surface and the second reflecting surface of the embodiment of the present application.

[0036] Explanation of reference numerals: 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, liquid dropping pipe; 142, pipe body. Detailed implementation manners

[0037] The following further elaborates on the present application in conjunction with the attached Figure 1-7 for a more detailed description.

[0038] The embodiment of the present application discloses a small-flow high-precision infrared leakage monitor. Referring to Figure 1 , a small-flow high-precision infrared leakage monitor includes a monitoring cylinder 1. The monitoring cylinder 1 is entirely made of stainless steel. The length of the monitoring cylinder 1 is 100 mm, the outer diameter is 36 mm, the cross-section of the outer wall of the monitoring cylinder 1 is circular, and an infrared detection member is provided on the inner wall of the monitoring cylinder 1. The infrared detection member includes an infrared temperature sensing probe 11. The infrared temperature sensing probe 11 penetrates and is fixedly connected to the middle of the side wall of the monitoring cylinder 1. The infrared temperature sensing probe 11 is 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.

[0039] Combined with Figure 1 and Figure 2 , a plurality of reflection angles 12 are provided on the inner wall of the monitoring cylinder 1. The plurality of reflection angles 12 are distributed along the circumferential direction of the monitoring cylinder 1. The plurality of reflection angles 12 on one side of the infrared temperature sensing probe 11 are symmetrically arranged with the plurality of reflection angles 12 on the other side, and the axis of the infrared temperature sensing probe 11 coincides with the symmetry axis of the plurality of reflection angles 12 on both sides.

[0040] Combined with Figure 1 and Figure 2, each reflection angle 12 includes a first reflection surface 121. In this embodiment, each reflection surface further includes a forming surface 122 connected to the first reflection surface 121. When actually processing the reflection angle 12, first take a stainless steel plate, and use a stamping machine to replace different molds to stamp different reflection angles 12 on the stainless steel plate. At this time, the reflection angle 12 will form the first reflection surface 121 and the forming surface 122. Fix the two side edges of the stainless steel plate together to form the monitoring cylinder 1. The multiple first reflection surfaces 121 are used to reflect the infrared radiation to the position where the infrared detection element is located when the droplet moves to the position relative to the infrared detection element. The multiple forming surfaces 122 are generated during stamping. However, in this application, when the infrared radiation emitted by the droplet irradiates on the forming surface 122, it can be reflected along the forming surface 122 to other first reflection surfaces 121, and can be reflected to the position where the infrared temperature sensor 11 is located along the first reflection surface 121, so that partial reflection of the infrared radiation can still be achieved.

[0041] Combined with Figure 1 and Figure 2 , in order to further improve the reflection effect of the first reflection surface 121 on the infrared radiation of the droplet, the linear surface angles between the multiple first reflection surfaces 121 and the axis of the infrared temperature sensor 11 are sequentially set as a1 - a n , where n≥2, a n -a n-1 =m, where m = 10° - 15°, a1 = 90°; In this embodiment, n = 10, there are 20 first reflection surfaces 121 and 20 forming surfaces 122 in total along the circumferential direction of the monitoring cylinder 1. The linear surface angle a1 between the first reflection surface 121 farthest from the infrared temperature sensor 11 and the axis of the infrared temperature sensor 11 is 90°, and the linear surface angle a 10 of the first reflection surface 121 closest to the infrared temperature sensor 11 and the axis of the infrared temperature sensor 11 is -12°.

[0042] Combined with 1 and Figure 3 , the first reflection surface 121 includes multiple second reflection surfaces 13. The multiple second reflection surfaces 13 are distributed along the axial direction of the monitoring cylinder 1. The multiple second reflection surfaces 13 are symmetrically arranged above and below the infrared temperature sensor 11. The axis of the infrared temperature sensor 11 coincides with the symmetry axis of the multiple second reflection surfaces 13; During the actual production process, when stamping the reflection angle 12, use a stamping machine to simultaneously stamp and form the second reflection surfaces 13. After the multiple first reflection surfaces 121 and the multiple second reflection surfaces 13 are stamped and formed, fix the two side edges of the stainless steel plate together by welding or other fixing methods to form the monitoring cylinder 1. The multiple second reflection surfaces 13 are used to reflect the infrared radiation to the position where the infrared detection element is located when the droplet moves to the position relative to the infrared detection element.

[0043] Combined with Figure 1 and Figure 3 Figure 3 , the line-plane angles between the axes of multiple second reflecting surfaces 13 and the infrared temperature sensor probe 11 are sequentially set as b1 - b k where k ≥ 2, b k -b k-1 = i, where i = 3°, b1 = 54°; in this embodiment, k = 12, each first reflecting surface 121 includes 24 second reflecting surfaces 13, the 12 second reflecting surfaces 13 on the upper part of the infrared temperature sensor probe 11 and the 12 second reflecting surfaces 13 on the lower part are symmetrically arranged, the line-plane angle b1 between the second reflecting surface 13 farthest from the infrared temperature sensor probe 11 and the axis of the monitoring cylinder 1 is 54°, and the line-plane angle b 12 of the second reflecting surface 13 closest to the infrared temperature sensor probe 11 and the axis of the monitoring cylinder 1 is 90°.

[0044] As Figure 4 shown, the small-flow high-precision infrared leakage monitor further 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 near the shaft seal device, so as to prevent excessive heat dissipation caused by too long a liquid droplet flow path. After removing the monitoring cylinder 1, it is convenient to clean and replace the monitoring cylinder 1.

[0045] Combined with Figure 4 and Figure 5 Figure 5 , in order to drive the leakage liquid flowing down in the leakage liquid collection pipeline 14 to drop in a droplet shape along the middle part of the monitoring cylinder 1, a droplet forming member for driving the leakage liquid to drop in a droplet shape inside the monitoring cylinder 1 is arranged in the leakage liquid collection pipeline 14. The droplet forming member includes a liquid dropping pipe 141 spirally arranged in the leakage liquid collection pipeline 14 along the length direction of the leakage liquid collection pipeline 14. One end of the spiral liquid dropping pipe 141 is fixedly arranged on the inner wall of the monitoring cylinder 1, and the other end is located in the middle of the monitoring cylinder 1; in order to prevent the liquid dropping pipe 141 from affecting the leakage when the leakage amount is too large, the cross section of the spiral liquid dropping pipe 141 is arranged in a semi-circular arc shape.

[0046] Combined with Figure 5 and Figure 6, in this embodiment, the spiral liquid dropper 141 does not overlap along the axial direction of the monitoring tube. The projected area of the liquid dropper 141 along the axial direction of the monitoring cylinder 1 is the same as the cross-sectional area of the inner wall of the monitoring cylinder 1, so that the leakage liquid flowing down from the inner wall of the leakage liquid collection pipeline 14 and the leakage liquid falling in the leakage liquid collection pipeline 14 can flow into the liquid dropper 141, and then form liquid droplets that fall along the middle of the monitoring cylinder 1. In order to prevent the falling path of the liquid dropper 141 from deviating, a tube body 142 is provided at the end of the liquid dropper 141 located in the monitoring cylinder 1. The tube body 142 coincides with the axis of the monitoring cylinder 1 and is communicated with the liquid dropper 141. The cross-section of the tube body 142 is circular ring-shaped.

[0047] The implementation principle of a small-flow high-precision infrared leakage monitor in an embodiment of the present application is as follows: When a small-flow leakage occurs, the leakage liquid flows down along the inner wall of the leakage liquid collection pipeline 14, flows into the spiral liquid dropper 141, flows along the spiral liquid dropper 141 into the tube body 142, and forms liquid droplets that fall along the end of the tube body 142. When the liquid droplets move to the position where the infrared temperature-sensing probe 11 is located, multiple first reflecting surfaces 121 and multiple second reflecting surfaces 13 reflect the infrared radiation of the liquid droplets (see Figure 7 ), so as to realize precise monitoring of small-flow leakage. And when the leakage amount changes from small to large (specifically, the seal leakage changes from the "drip leakage" state to the "linear leakage" state), relying on multiple first reflecting surfaces 121 and multiple second reflecting surfaces 13 can more precisely realize the monitoring and calculation of the leakage amount, which is convenient for the monitoring personnel to judge the size of the leakage amount. And when the leakage amount is large, the leakage liquid will overflow the semi-circular liquid dropper 141 to prevent blockage when the leakage amount is large.

[0048] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A small-flow high-precision infrared leakage monitor, characterized in that: It includes a monitoring cylinder (1). An infrared detection component is arranged on the inner wall of the monitoring cylinder (1). A plurality of reflection angles (12) are arranged on the inner wall of the monitoring cylinder (1). The plurality of reflection angles (12) are distributed circumferentially along the monitoring cylinder (1). Each of the reflection angles (12) includes a first reflection surface (121). The plurality of first reflection surfaces (121) are used to reflect infrared radiation to the position where the infrared detection component is located when the liquid droplet moves to a position relative to the infrared detection component. The infrared detection component includes an infrared temperature sensor probe (11). The infrared temperature sensor probe (11) penetrates and is fixedly connected to the middle of the side wall of the monitoring cylinder (1). The plurality of reflection angles (12) on one side of the infrared temperature sensor probe (11) are symmetrically arranged with the plurality of reflection angles (12) on the other side. The axis of the infrared temperature sensor probe (11) coincides with the symmetry axis of the plurality of reflection angles (12) on both sides. The line-plane angles between multiple said first reflecting surfaces (121) and the axis of the infrared temperature sensor probe (11) are sequentially set to a1 - an in the direction approaching the infrared temperature sensor probe (11). n , where n ≥ 2, an n - a1 n-1 = m, where m = 10° - 15°, and a1 = 90°.

2. The small-flow high-precision infrared leakage monitor according to claim 1, wherein: The first reflection surface (121) includes a plurality of second reflection surfaces (13). The plurality of second reflection surfaces (13) are distributed axially along the monitoring cylinder (1). The plurality of second reflection surfaces (13) are used to reflect infrared radiation to the position where the infrared detection component is located when the liquid droplet moves to a position relative to the infrared detection component.

3. The small-flow high-precision infrared leakage monitor according to claim 2, characterized in that: The plurality of second reflection surfaces (13) are symmetrically arranged above and below the infrared temperature sensor probe (11). The axis of the infrared temperature sensor probe (11) coincides with the symmetry axis of the plurality of second reflection surfaces (13).

4. The small-flow high-precision infrared leakage monitor according to claim 3, wherein: The line-plane angles between multiple said second reflecting surfaces (13) and the axis of the infrared temperature sensor probe (11) are sequentially set as b1 - b in the direction approaching the infrared temperature sensor probe (11). k , where k ≥ 2, b k -b k-1 = i, where i = 3°, b1 = 54°.

5. A small-flow high-precision infrared leakage monitor according to any one of claims 1-4, characterized in that: The small-flow high-precision infrared leakage monitor further includes a leakage liquid collection pipeline (14) arranged on the shaft seal device. The monitoring cylinder (1) is detachably connected to the leakage liquid collection pipeline (14). A liquid droplet forming component for driving the leakage liquid to be in a droplet state and dripping in the monitoring cylinder (1) is arranged in the leakage liquid collection pipeline (14).

6. The small-flow high-precision infrared leakage monitor according to claim 5, characterized in that: The liquid droplet forming component includes a liquid dropping pipe (141) spirally arranged in the leakage liquid collection pipeline (14) along the length direction of the leakage liquid collection pipeline (14). One end of the spiral liquid dropping pipe (141) is fixedly arranged on the inner wall of the monitoring cylinder (1), and the other end is located in the middle of the monitoring cylinder (1).

7. A small-flow high-precision infrared leakage monitor according to claim 6, characterized in that: The cross section of the spiral liquid dropping pipe (141) is semicircular.

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