Sampling device for iodine adsorber purification efficiency test

Abstract

The utility model discloses an iodine adsorber purification efficiency test sampling device which comprises a box body and a sensor, the box body defines an internal space, and a box body air inlet and a box body air outlet which are respectively communicated with the internal space are formed in the box body; the sensor is located in the inner space and comprises a sensor air inlet and a sensor air outlet, the sensor air inlet is communicated with the box body air inlet, and the sensor air outlet is communicated with the space outside the inner space; the size of the box body air inlet is larger than that of the sensor air inlet. According to the utility model, the measurement precision can be improved, the measurement error caused by self leakage of the sensor can be avoided, and the transmission time of sample gas can be shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of air purification testing, in particular to an iodine adsorber purification efficiency test sampling device. Background Art

[0002] Nuclear power plants generally use activated carbon iodine adsorbers to purify nuclear air. The iodine adsorbers need to use radioactive methyl iodide for purification efficiency tests every year. Since the test introduces non-sealed radioactive substances, the risk and harm of leakage are very high. Therefore, a purification efficiency test method is urgently needed to solve the problem of radioactive substance leakage risk during the test.

[0003] The existing technical solution uses non-radioactive methyl iodide to test the purification efficiency of the iodine adsorber, and uses a sensor to measure the methyl iodine concentration to solve the problem of the risk of radioactive material leakage in the previous test process. However, the accuracy of the sensor measurement depends on the representativeness of the sensor inlet gas, and the sensor's inlet pipeline is a long and thin hose. There is a relatively long pipeline from the pipeline sampling point to the sensor, and the sensor requires a small flow rate, which makes the sample gas take a long time to reach the sensor. In addition, due to possible leakage on the sensor sealing surface, the measured VOC (volatile organic compound) concentration deviates from the actual concentration in the pipeline. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a sampling device for iodine adsorber purification efficiency test.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] Construct an iodine adsorber purification efficiency test sampling device, comprising:

[0007] A box body, the box body defining an internal space and forming a box body air inlet and a box body air outlet respectively connected to the internal space; and

[0008] A sensor, the sensor is located in the internal space and comprises a sensor air inlet and a sensor air outlet, the sensor air inlet is connected to the box body air inlet, and the sensor air outlet is connected to the space outside the internal space;

[0009] Wherein, the size of the box body air inlet is larger than the sensor air inlet.

[0010] In some embodiments, the box body includes a first air inlet duct forming an air inlet of the box body, the sensor includes a sensor body and a second air inlet duct forming an air inlet of the sensor, one end of the second air inlet duct is connected to the sensor body, and the other end of the second air inlet duct is disposed in the first air inlet duct;

[0011] The outer diameter of the second air intake duct is smaller than the inner diameter of the first air intake duct.

[0012] In some embodiments, the sensor further includes a second air outlet pipe, one end of which is connected to the sensor body, and the other end of which passes through the outside of the box body.

[0013] In some embodiments, the box body includes a detachably connected front cover and a rear shell, the rear shell includes a rear wall and a cylindrical side wall, the rear end of the cylindrical side wall is fixed to the rear wall, the front end of the cylindrical side wall is detachably connected to the front cover, and the front cover and the rear shell together define the internal space;

[0014] The cylindrical side wall is penetrated by a first through hole along the wall thickness direction, and the other end of the second air outlet pipe passes through the first through hole to the outside of the box body.

[0015] In some embodiments, an electric control board is further included, and the electric control board is located in the internal space. The sensor is fixed to the electric control board and electrically connected to the electric control board.

[0016] In some embodiments, the box body includes a front cover and a rear shell that are detachably connected, the rear shell includes a rear wall and a cylindrical side wall, the rear end of the cylindrical side wall is fixed to the rear wall, the front end of the cylindrical side wall is detachably connected to the front cover, and the front cover and the rear shell together define the internal space.

[0017] In some embodiments, a first air inlet duct and a first air outlet duct are provided on the cylindrical side wall, one end of the first air inlet duct is connected to the internal space to form the air inlet of the box body, and one end of the first air outlet duct is connected to the internal space to form the air outlet of the box body.

[0018] In some embodiments, it further includes an electric control board, the electric control board is located in the internal space and fixed on the rear wall, and the sensor is electrically connected to the electric control board;

[0019] The cylindrical side wall is penetrated by a second through hole along the wall thickness direction, and the lead wire of the electric control board is led out from the second through hole.

[0020] In some embodiments, the box body further includes a clamp and a sealing ring, the sealing ring is disposed between the front cover and the front end of the cylindrical side wall, and the front cover and the rear shell are detachably connected via the clamp.

[0021] In some embodiments, the box body is cylindrical.

[0022] The utility model has at least the following beneficial effects:

[0023] The utility model arranges the sensor in a box body and sets the size of the box body air inlet to be larger than the size of the sensor air inlet, so that the sample gas can quickly enter the sampling device with a large flow rate, shortening the transmission time of the sample gas. At the same time, the internal space can also be filled with sample gas, avoiding measurement errors caused by leakage of the sensor itself, thereby improving measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0025] Figure 1 It is a schematic diagram of the exploded structure of an iodine adsorber purification efficiency test sampling device according to an embodiment of the utility model;

[0026] Figure 2 yes Figure 1 Schematic diagram of the internal structure of the iodine adsorber purification efficiency test sampling device shown. DETAILED DESCRIPTION

[0027] In order to have a clearer understanding of the technical features, purposes and effects of the present utility model, the specific implementation methods of the present utility model are now described in detail with reference to the accompanying drawings.

[0028] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "rear", "up", "down", "left", "right", "vertical", "horizontal", "bottom", "inside", "inside", "outside", etc. are based on the directions or positional relationships shown in some of the drawings, and are constructed and operated in a specific direction. They are only for the convenience of describing the present technical solution, and do not indicate that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0029] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0030] In the following description, specific details such as specific system structures and technologies are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details that hinder the description of the present invention.

[0031] Figure 1 and Figure 2 An iodine adsorber purification efficiency test sampling device 1 in one embodiment of the utility model is shown, which can be used to perform a purification efficiency test on an iodine adsorber. The iodine adsorber purification efficiency test sampling device 1 includes a box body 10 and a sensor 20. The box body 10 defines an internal space 15 for accommodating the sensor 20. The box body 10 is also formed with a box body air inlet and a box body air outlet respectively connected to the internal space 15, which are used to input and output sample gas respectively. The sensor 20 is used to detect the VOC (volatile organic compound, the same below) concentration in the sample gas, including a sensor air inlet and a sensor air outlet. The sensor air inlet is connected to the box body air inlet, and the sensor air outlet is connected to the space outside the internal space 15. The size of the box body air inlet is larger than the sensor air inlet to ensure that the sample gas can be transmitted to the internal space 15 while being transmitted to the sensor 20.

[0032] It should be understood that, in this embodiment, the VOC in the sample gas is non-radioactive methyl iodide. In some other optional embodiments, the sampling device 1 can also be used to detect other VOC concentrations in other sample gases.

[0033] The box body 10 includes a front cover 11 and a rear shell 12, wherein the front cover 11 and the rear shell 12 are detachably connected, and the two together define the internal space 15. The rear shell 12 includes a rear wall 121 and a cylindrical side wall 122, wherein the rear wall 121 is fixed to the rear end of the cylindrical side wall 122, so that the rear shell 12 has a structure with one end closed and the other end open, and the front cover 11 is detachably connected to the front end of the cylindrical side wall 122, so that the open end of the rear shell 12 can be operably blocked by the front cover 11.

[0034] In this embodiment, the box body 10 is cylindrical in shape, the front cover 11 and the rear wall 121 are both circular, and the cylindrical side wall 122 is cylindrical. The structure of the box body 10 can avoid the existence of dead space in the flow channel, so that the sample gas can flow completely in the internal space without gathering inside.

[0035] In some other optional embodiments, the box body 10 may also be in other shapes such as elliptical, streamlined, racetrack, diamond, etc.

[0036] In some embodiments, the rear wall 121 and the cylindrical side wall 122 can be fixed together by various methods such as integral molding, welding, and gluing, which are not specifically limited here.

[0037] In some embodiments, at least one positioning ear plate 1211 is extended outwardly around the rear wall 121 to fix the iodine adsorber purification efficiency test sampling device 1 .

[0038] In some embodiments, the rear shell 12 further includes a first air inlet pipe 123 and a first air outlet pipe 124, both of which are arranged on the cylindrical side wall 122, and connect the internal space 15 with the outside of the box body 10. One end of the first air inlet pipe 123 is connected to the internal space 15 to form the air inlet of the box body, and one end of the first air outlet pipe 124 is connected to the internal space 15 to form the air outlet of the box body. The sample gas flows into the internal space 15 through the first air inlet pipe 123 and flows out through the first air outlet pipe 124, so that a test environment with a certain sample gas concentration is formed in the internal space 15, which can avoid the measurement deviation caused by the leakage of the sealing surface of the sensor 20.

[0039] In this embodiment, the first air inlet duct 123 and the first air outlet duct 124 are arranged relative to each other to facilitate the circulation of the sample gas and avoid airflow dead corners, and both are in a round tube shape to facilitate connection with other devices. In some other optional embodiments, the first air inlet duct 123 and the first air outlet duct 124 can also be set to other tubular shapes, and the first air inlet duct 123 and the first air outlet duct 124 can also not be arranged relative to each other on the cylindrical side wall 122. The first air inlet duct 123 and / or the first air outlet duct 124 can also be connected to the internal space 15 through the front cover 11 or the rear wall 121.

[0040] In some embodiments, the box body 10 further includes a clamp 13 and a sealing ring 14. The sealing ring 14 is disposed between the front cover 11 and the rear shell 12, specifically, between the front cover 11 and the front end of the cylindrical side wall 122, and is used to seal the gap between the front cover 11 and the rear shell 12 to improve the sealing performance of the iodine adsorber purification efficiency test sampling device 1. The clamp 13 is used to realize the detachable connection between the front cover 11 and the rear shell 12, so as to facilitate the replacement or maintenance of parts quickly and conveniently.

[0041] In some other optional embodiments, the front cover 11 and the rear shell 12 may also be detachably connected by means of a snap-fit ​​structure or the like.

[0042] In this embodiment, the clamp 13 is a quick-release clamp to improve the convenience of assembly and disassembly.

[0043] In some embodiments, the sensor 20 is mounted on the box body 10 and is located in the internal space 15, and includes a sensor body 21, a second air inlet pipe 22, and a second air outlet pipe 23. The sensor body 21 is in the shape of a box body, and one end of the second air inlet pipe 22 and the second air outlet pipe 23 are both connected to the sensor body 21, and are respectively used to input and output sample gas to the sensor body 21. One end of the second air inlet pipe 22 is connected to the sensor body 21 to form the air inlet of the sensor, and one end of the second air outlet pipe 23 is connected to the sensor body 21 to form the air outlet of the sensor.

[0044] The other end of the second air inlet pipe 22 is disposed in the first air inlet pipe 123 , so that part of the sample gas input from the first air inlet pipe 123 flows into the sensor body 21 through the second air inlet pipe 22 by diversion.

[0045] Specifically, the outer diameter of the second air inlet pipe 22 is smaller than the inner diameter of the first air inlet pipe 123, so as to ensure that the sample gas flows into the internal space 15 while flowing into the sensor body 21, thereby creating a test environment to avoid inaccurate testing caused by gas leakage from the sensor body 21. In addition, the large flow rate of the first air inlet pipe 123 can ensure that the sample gas can quickly reach the internal space 15, and the sample gas entering the sensor body 21 only needs to be diverted by a small part to reach the flow rate required for sensor measurement, thereby avoiding differences in representativeness of test data caused by differences in flow time.

[0046] The other end of the second gas outlet pipe 23 is disposed outside the box body 10 for discharging the sample gas. In some embodiments, the cylindrical side wall 122 of the rear shell 12 is penetrated with a first through hole 1221 along the wall thickness direction, and the other end of the second gas outlet pipe 23 is disposed inside the first through hole 1221 and passes through the first through hole 1221 to the outside of the box body 10.

[0047] In some other optional embodiments, the first through hole 1221 may also be provided on the front cover 11 or the rear wall 121 .

[0048] It should be understood that a sealing member (not shown in the figure) is further provided between the second air outlet pipe 23 and the hole wall of the first through hole 1221 to ensure the sealing performance of the box body 10 .

[0049] The provision of the second air inlet pipe 22 and the second air outlet pipe 23 can flexibly control the sample concentration of the sensor body 21 and the sample concentration of the internal space 15 to ensure the accuracy of the test.

[0050] In some embodiments, the sensor 20 is a photoelectric sensor.

[0051] In some embodiments, the iodine adsorber purification efficiency test sampling device 1 further includes an electric control board 30 , which is located in the internal space 15 and is electrically connected to the sensor 20 .

[0052] Specifically, the cylindrical side wall 122 of the rear housing 12 is further penetrated by a second through hole 1222 along the wall thickness direction, and the lead wire 31 of the electric control board 30 is led out from the second through hole 1222 .

[0053] In some other optional embodiments, the second through hole 1222 may also be provided on the front cover 11 or the rear wall 121. It should be understood that a sealing member (not shown) is further provided between the lead 31 and the hole wall of the second through hole 1222 to ensure the sealing performance of the box body 10.

[0054] In this embodiment, the electric control board 30 is fixed on the inner wall surface of the rear wall 121 , and the sensor 20 is fixed on the electric control board 30 .

[0055] It should be understood that the electric control board 30 and the sensor 20 may be fixed by welding, bolt connection, adhesive connection, etc., which is not specifically limited here.

[0056] In some other optional embodiments, the electric control board 30 may also be fixed on the front cover 11 or the cylindrical side wall 122 , and the sensor 20 may also be installed on the front cover 11 or the cylindrical side wall 122 or the rear wall 121 .

[0057] The iodine adsorber purification efficiency test sampling device 1 constructed by the utility model can provide reliable sample gas, shorten the transmission time from the sample gas in the pipeline to the sensor body 21, avoid the measurement deviation caused by the leakage of the sensor body 21 itself, and enable the measurement accuracy to be better than 5% within the ppb-ppm level range.

[0058] It is understandable that the above embodiments only express the preferred implementation of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the utility model, the above technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should belong to the scope of the claims of the utility model.

Claims

1. An iodine adsorber purification efficiency test sampling device, characterized in that: include: A box body (10), wherein the box body (10) defines an internal space (15) and is provided with a box body air inlet and a box body air outlet respectively connected to the internal space (15); as well as A sensor (20), the sensor (20) being located in the internal space (15) and comprising a sensor air inlet and a sensor air outlet, the sensor air inlet being connected to the box body air inlet, and the sensor air outlet being connected to the space outside the internal space (15); Wherein, the size of the box body air inlet is larger than the sensor air inlet.

2. The iodine adsorber purification efficiency test sampling device according to claim 1, characterized in that: The box body (10) comprises a first air intake pipe (123) forming an air intake port of the box body, the sensor (20) comprises a sensor body (21) and a second air intake pipe (22) forming an air intake port of the sensor, one end of the second air intake pipe (22) is connected to the sensor body (21), and the other end of the second air intake pipe (22) is arranged in the first air intake pipe (123); The outer diameter of the second air intake pipe (22) is smaller than the inner diameter of the first air intake pipe (123).

3. The iodine adsorber purification efficiency test sampling device according to claim 2, characterized in that: The sensor (20) further comprises a second air outlet pipe (23), one end of which is connected to the sensor body (21) and the other end of which passes through the outside of the box body (10).

4. The iodine adsorber purification efficiency test sampling device according to claim 3, characterized in that: The box body (10) comprises a front cover (11) and a rear shell (12) which are detachably connected, the rear shell (12) comprises a rear wall (121) and a cylindrical side wall (122), the rear end of the cylindrical side wall (122) is fixed to the rear wall (121), the front end of the cylindrical side wall (122) is detachably connected to the front cover (11), and the front cover (11) and the rear shell (12) together define the internal space (15); The cylindrical side wall (122) is penetrated by a first through hole (1221) along the wall thickness direction, and the other end of the second air outlet pipe (23) passes through the first through hole (1221) to the outside of the box body (10).

5. The iodine adsorber purification efficiency test sampling device according to claim 1, characterized in that: It also includes an electric control board (30), the electric control board (30) is located in the internal space (15), and the sensor (20) is fixed on the electric control board (30) and is electrically connected to the electric control board (30).

6. The iodine adsorber purification efficiency test sampling device according to claim 1, characterized in that: The box body (10) comprises a front cover (11) and a rear shell (12) which are detachably connected, the rear shell (12) comprises a rear wall (121) and a cylindrical side wall (122), the rear end of the cylindrical side wall (122) is fixed to the rear wall (121), the front end of the cylindrical side wall (122) is detachably connected to the front cover (11), and the front cover (11) and the rear shell (12) together define the internal space (15).

7. The iodine adsorber purification efficiency test sampling device according to claim 6, characterized in that: A first air inlet pipe (123) and a first air outlet pipe (124) are provided on the cylindrical side wall (122); one end of the first air inlet pipe (123) is connected to the internal space (15) to form the air inlet of the box body; one end of the first air outlet pipe (124) is connected to the internal space (15) to form the air outlet of the box body.

8. The iodine adsorber purification efficiency test sampling device according to claim 6, characterized in that: It also includes an electric control board (30), the electric control board (30) is located in the internal space (15) and fixed on the rear wall (121), and the sensor (20) is electrically connected to the electric control board (30); The cylindrical side wall (122) is penetrated by a second through hole (1222) along the wall thickness direction, and the lead wire (31) of the electric control board (30) is led out from the second through hole (1222).

9. The iodine adsorber purification efficiency test sampling device according to claim 6, characterized in that: The box body (10) further comprises a clamp (13) and a sealing ring (14), wherein the sealing ring (14) is arranged between the front cover (11) and the front end of the cylindrical side wall (122), and the front cover (11) and the rear shell (12) are detachably connected via the clamp (13).

10. The iodine adsorber purification efficiency test sampling device according to claim 1, characterized in that: The box body (10) is cylindrical.

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