Sampling structure of handheld volatile gas analyzer

Abstract

The utility model relates to the technical field of gas sampling, in particular to a sampling structure of a handheld volatile gas analyzer, which comprises an analyzer body, a sampling gun tube and a tube barrel, the tube barrel is sleeved outside the sampling gun tube, and the tube barrel and the sampling gun tube are detachably connected to the side surface of the analyzer body; a partition piece is arranged in the pipe barrel, the partition piece and the pipe barrel form an interlayer, and the partition piece is close to an end opening of the analyzer body and is connected into the pipe barrel through a plurality of connecting rods; a primary filter screen is detachably arranged at the end part, far away from the analyzer body, of the pipe barrel; a drying mechanism is detachably arranged in the end part, close to the primary filter screen, of the interlayer. When the gas analyzer is used, gas enters the pipe barrel from the primary filter screen, is dried by the drying mechanism in the interlayer, enters the partition from the interlayer, and enters the analyzer body from the partition through the sampling gun pipe for gas analysis. It is guaranteed that analyzed gas is clean and dry, and it is avoided that impurities and moisture easily damage devices and affect the accuracy and efficiency of analysis results.

Description

Technical Field

[0001] This utility model relates to the field of gas sampling technology, specifically to a sampling structure for a handheld volatile gas analyzer. Background Technology

[0002] A gas analyzer is a process analysis instrument used to measure the composition of gases. It detects the types and concentrations of gases in the environment through gas sensors, including the analysis of volatile gases. Gas analyzers typically have a sampling nozzle at the gas inlet of the analyzer body for gas collection and delivery into the analyzer for analysis.

[0003] Volatile gas analyzers typically sample directly from the air, which may contain volatile gases. However, the air may contain interfering components such as dust and moisture, which can affect the analytical results. Furthermore, the analyzer itself contains sensors and other electronic components; if dust or moisture enters, it can easily cause damage and aging, reducing the equipment's lifespan. This invention utilizes a sampling structure in a handheld volatile gas analyzer to filter and dry the sampled gas, improving the equipment's performance, extending its lifespan, and increasing analytical accuracy. Moreover, the sampling structure of this handheld volatile gas analyzer is detachably connected to the analyzer body, facilitating disassembly and maintenance. Utility Model Content

[0004] This invention provides a sampling structure for a handheld volatile gas analyzer to improve the equipment's performance and lifespan, as well as facilitate disassembly and maintenance.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows: A sampling structure for a handheld volatile gas analyzer is provided, comprising an analyzer body and a sampling tube connected to the analyzer. Its innovation lies in the following: it further includes a tubing sleeve fitted over the sampling tube. The ends of the tubing sleeve and the sampling tube near the analyzer body are detachably connected to the upper side of the analyzer body, and the sampling tube is connected to the analyzer body. A hollow cylindrical spacer is provided inside the tubing sleeve, forming an annular sandwich. The end of the spacer near the analyzer body is open and connected to the inner side of the tubing sleeve along its circumference by several connecting rods. The end of the sampling tube away from the analyzer body is placed inside the tubing sleeve. A primary filter is detachably provided at the end of the tubing sleeve away from the analyzer body. A drying mechanism is detachably provided inside the sandwich layer at the end near the primary filter.

[0006] Furthermore, the detachable connection structure between the primary filter and the tube end is as follows: a connecting ring is provided around the primary filter, the outer diameter of the connecting ring being equal to the outer diameter of the tube; two connecting components are provided on the end face of the connecting ring away from the spacer, the two connecting components being symmetrically arranged; the connecting components include two symmetrical fixed clamps with inverted L-shaped cross-sections, the horizontal ends of the fixed clamps being fixed to the connecting ring, and the vertical ends extending towards the primary filter; a groove is formed between the two fixed clamps; it also includes an elastic band, the side of the tube having a hook corresponding to each connecting component, one end of the elastic band being fixed to the hook, and the other end being connected to a T-shaped movable clamp, the vertical part of the movable clamp being engaged in the groove, and the horizontal ends of the movable clamp being engaged between the vertical part of the fixed clamp and the connecting ring.

[0007] Furthermore, the drying mechanism includes an annular drying frame fitted within the interlayer, the drying frame containing a desiccant, the sides of the drying frame near and away from the primary filter being secondary filters, and the side of the secondary filter near the analyzer body having a fixing ring plate, the fixing ring plate being detachably connected to the tube.

[0008] Furthermore, the structure of the fixed ring plate detachably connected to the tube is as follows: the interlayer is provided with a limiting member with an L-shaped cross section corresponding to the fixed ring plate, the vertical upper end of the limiting member is connected to the top of the tube, the outer circumference of the limiting member is provided with multiple tightening rings, the tightening rings are connected to the top of the tube by springs, and the fixed ring plate is placed between the horizontal part of the limiting member and the tightening rings.

[0009] Furthermore, the end section of the fixed ring plate away from the secondary filter screen is pointed.

[0010] Furthermore, the vertical portion of the limiting member is uniformly provided with several through holes.

[0011] Furthermore, a support ring is provided on the secondary filter screen away from the analyzer body, and a ring groove is provided on the primary filter screen corresponding to the support ring, with the end of the support ring near the primary filter screen placed in the ring groove.

[0012] Furthermore, the side of the analyzer body is provided with a sleeve and a tube sleeve respectively corresponding to the tube and the sampling gun tube. The tube sleeve is located inside the sleeve, and the tube and the sampling gun tube are threaded into the sleeve and the tube sleeve respectively.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This utility model discloses a handheld volatile gas analyzer. The sampling structure includes a tube surrounding the sampling gun barrel, with a partition inside the tube. The gas inlet of the sampling gun barrel is placed within the partition. A primary filter and a drying mechanism are also provided at the end of the tube. In use, gas enters the tube through the primary filter, is dried by the drying mechanism within the partition, then enters the partition and finally the sampling gun barrel. The gas is then sampled and enters the analyzer body for analysis. This ensures the analyzed gas is clean and dry, preventing impurities and moisture from damaging the device and affecting the accuracy and efficiency of the analysis results.

[0015] This utility model discloses a handheld volatile gas analyzer whose sampling structure, including the tube and sampling gun, is detachably connected to the analyzer body. The primary filter and drying mechanism are also detachably mounted on the tube, facilitating easy assembly and disassembly and maintenance of the drying mechanism, primary filter, and the interior of the tube. Furthermore, the sampling structure can be disassembled and stored when the analyzer is not in use, reducing space occupation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall sampling structure of a handheld volatile gas analyzer according to the present invention.

[0018] Figure 2 For the present utility model Figure 1 An enlarged schematic diagram of the sampling gun barrel and tubing.

[0019] Figure 3 For the present utility model Figure 2 Enlarged view of point A in the image.

[0020] Figure 4 This is a schematic diagram of the end face of the tube of this utility model with a primary filter screen.

[0021] Figure 5 This is a cross-sectional view of the end of the partition of this utility model, which is connected to the tube by a connecting rod.

[0022] Figure 6 This is a cross-sectional view of the fixing ring plate of this utility model positioned between the horizontal part of the limiting member and the tightening ring member.

[0023] Figure 7 This is a three-dimensional structural diagram of the limiting component of this utility model.

[0024] The components include: 1. Analyzer body; 2. Sampling gun barrel; 3. Tube; 4. Spacer; 5. Interlayer; 6. Connecting rod; 7. Primary filter; 8. Drying mechanism; 81. Drying frame; 82. Desiccant; 83. Secondary filter; 84. Fixing ring plate; 85. Limiting component; 86. Tightening ring; 87. Spring; 88. Through hole; 89. Support ring; 9. Connecting ring; 10. Fixed clamp; 11. Slot; 12. Elastic band; 13. Hook; 14. Moving clamp; 15. Ring groove; 16. Sleeve; 17. Tube sleeve. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1

[0027] This embodiment provides a sampling structure for a handheld volatile gas analyzer, such as... Figure 1 and 2 As shown, the analyzer includes an analyzer body 1 and a sampling gun tube 2 connected to the analyzer, and also includes a tube 3. The tube 3 is sleeved outside the sampling gun tube 2. The ends of the tube 3 and the sampling gun tube 2 near the analyzer body 1 are detachably connected to the upper side of the analyzer body 1, and the sampling gun tube 2 is connected to the analyzer body 1. A hollow cylindrical spacer 4 is provided inside the tube 3. The spacer 4 and the tube 3 form an annular sandwich 5. The end of the spacer 4 near the analyzer body 1 is open, and it is connected to the inner side of the tube 3 along the circumference by several connecting rods 6. Figure 5 As shown, the end of the sampling gun tube 2 away from the analyzer body 1 is placed inside the tube 3; the end of the tube 3 away from the analyzer body 1 is detachably equipped with a primary filter 7; the end of the interlayer 5 near the primary filter 7 is detachably equipped with a drying mechanism 8.

[0028] The analyzer body 1 typically has a built-in suction pump. The suction pump draws gas from the outside through the primary filter 7 and the drying mechanism 8, then through the interlayer 5 into the partition 4, and finally through the sampling tube 2 into the analyzer body 1 for analysis. This ensures that the gas being analyzed is clean and dry, preventing impurities and moisture from damaging the device and affecting the accuracy and efficiency of the analysis results.

[0029] Example 2

[0030] Based on the above embodiments, the structure of the detachable connection between the primary filter 7 and the tube 3 in this embodiment is as follows: a connecting ring 9 is provided around the primary filter 7, and the outer diameter of the connecting ring 9 is equal to the outer diameter of the tube 3; two connecting components are provided on the end face of the connecting ring 9 away from the spacer 4, and the two connecting components are symmetrically arranged; the connecting components include two symmetrical fixed clamps 10 with inverted L-shaped cross sections, the horizontal ends of the fixed clamps 10 are fixed on the connecting ring 9, and the vertical ends extend towards the primary filter 7; a groove 11 is formed between the two fixed clamps 10; it also includes an elastic band 12, and a hook 13 is provided on the side of the tube 3 corresponding to each connecting component. One end of the elastic band 12 is fixed on the hook 13, and the other end is connected to a T-shaped movable clamp 14. The vertical part of the movable clamp 14 is clamped in the groove 11, and the two horizontal ends of the movable clamp 14 are clamped between the vertical part of the fixed clamp 10 and the connecting ring 9.

[0031] In this embodiment, the elasticity of the elastic band 12 is such that when it is not pulled by an external force, the horizontal ends of the moving clip 14 cannot be inserted between the fixed clip 10 and the connecting ring 9.

[0032] In this embodiment, when installing the primary filter 7, the primary filter 7 is attached to the outer end of the tube 3, and the connecting component is positioned corresponding to the hook 13. The elastic band 12 is pulled, causing the horizontal ends of the movable clamp 14 to engage between the vertical portion of the fixed clamp 10 and the connecting ring 9, and the vertical portion of the movable clamp 14 to engage within the groove 11. The elasticity of the elastic band 12 tightly adheres the primary filter 7 to the end of the tube 3. Figure 4 As shown, the upper moving part 14 is inserted into the fixed part 10, while the lower moving part 14 is not inserted into the fixed part 10.

[0033] As another implementation, a sealing gasket can be provided between the connecting ring 9 and the end of the tube 3 to increase the sealing performance inside the tube 3.

[0034] Example 3

[0035] Based on the above embodiments, the drying mechanism 8 of this embodiment includes an annular drying frame 81 fitted within the interlayer 5, and a desiccant 82 is disposed within the drying frame 81, such as... Figure 3 As shown, the sides of the drying frame 81 that are close to and away from the primary filter 7 are both secondary filters 83. The side of the secondary filter 83 that is close to the analyzer body 1 is provided with a fixing ring plate 84, which is detachably connected to the tube 3.

[0036] In this embodiment, the desiccant 82 can be activated carbon or other desiccants 82 that can dry volatile gases.

[0037] In this embodiment, the gas, after being filtered by the primary filter 7, enters the drying frame 81 through the secondary filter 83. After being dehumidified and dried by the desiccant 82, it passes through another secondary filter 83, moves within the interlayer 5, and finally enters the partition 4. It then enters the analyzer body 1 through the sampling tube 2 for detection and analysis. The drying frame 81 is detachable and installable via the fixing ring plate 84, making disassembly and assembly convenient and facilitating maintenance.

[0038] Example 4

[0039] Based on the above embodiments, in order to facilitate the disassembly and assembly of the drying mechanism 8, the structure of the fixed ring plate 84 detachably connected to the tube 3 in this embodiment is as follows: A limiting member 85 with an L-shaped cross-section is provided inside the interlayer 5 corresponding to the fixed ring plate 84. The vertical upper end of the limiting member 85 is connected to the top of the inner tube 3. Multiple tightening rings 86 are provided along the outer circumference of the limiting member 85. The tightening rings are connected to the top of the inner tube 3 via springs 87. The fixed ring plate 84 is positioned between the horizontal part of the limiting member 85 and the tightening rings 86. Figure 6 As shown.

[0040] In this embodiment, the elastic force of spring 87 is such that, when no external force is applied, the distance between the horizontal portions of the tightening ring and the limiting member 85 is less than the thickness of the fixing ring plate 84. When installing the drying mechanism 8, the drying frame 81 is inserted into the interlayer 5, and the fixing ring plate 84 presses the tightening ring through the horizontal portion between the tightening ring and the limiting member 85. The elastic force of spring 87 presses the fixing ring plate 84 against the horizontal portion of the limiting member 85 through the tightening ring, thus fixing the fixing ring plate 84. The detachable installation of the drying mechanism 8 is completed in sequence. When disassembly and maintenance are required, the drying frame 81 can be moved outwards directly.

[0041] Example 5

[0042] Based on the above embodiments, in order to facilitate the installation of the fixing ring plate 84 between the horizontal part of the limiting member 85 and the tightening ring member 86, the end section of the fixing ring plate 84 away from the secondary filter screen 83 in this embodiment is pointed.

[0043] In this embodiment, the end of the fixing ring plate 84 is set in a pointed shape, which facilitates quick insertion between the horizontal part of the limiting member 85 and the tightening ring 86 during installation, thereby improving installation efficiency.

[0044] Example 6

[0045] Based on the above embodiments, in order to improve the gas conveying efficiency, the vertical portion of the limiting member 85 in this embodiment is uniformly provided with a plurality of through holes 88, such as... Figure 7As shown. In this embodiment, if the through hole 88 is not provided, the gas dried by the drying frame 81 is transported through the space between the spacers 4 of the limiting member 85, based on the inner side of the tube 3 connected to the vertical part of the limiting member 85. Since the space is small, the gas transport is limited. Therefore, the setting of the through hole 88 can increase the gas transport efficiency.

[0046] Example 7

[0047] Based on the above embodiments, in order to facilitate the disassembly and assembly of the drying mechanism 8, the secondary filter 83 away from the analyzer body 1 in this embodiment is provided with a support ring 89, and the primary filter 7 is provided with a ring groove 15 corresponding to the support ring 89. The end of the support ring 89 near the primary filter 7 is placed in the ring groove 15.

[0048] In this embodiment, the drying mechanism 8 and the primary filter 7 are connected by a snap-fit ​​mechanism. During installation, after the drying mechanism 8 is installed, the annular groove 15 of the primary filter 7 is aligned with the snap-fit ​​support ring 89, and then the primary filter 7 is fixed. Therefore, the end of the support ring 89 extends out of the tube 3. During disassembly, after removing the primary filter 7, the drying frame 81 can be removed by simply pulling the support ring 89 outward, improving the convenience and flexibility of disassembly and assembly. Furthermore, by connecting the drying mechanism 8 and the primary filter 7, the installation stability of the drying mechanism 8 and the primary filter 7 is increased.

[0049] Example 8

[0050] Based on the above embodiments, in order to facilitate disassembly and maintenance and not occupy space when not in use, the side of the analyzer body 1 of this embodiment is provided with a sleeve 16 and a tube sleeve 17 corresponding to the tube 3 and the sampling gun tube 2, respectively. The tube sleeve 17 is located inside the sleeve 16, and the tube 3 and the sampling gun tube 2 are threaded into the sleeve 16 and the tube sleeve 17, respectively.

[0051] In this embodiment, the sleeve and sampling gun barrel 2 are bolted to the copper sleeve and tube sleeve 17 respectively. They are installed when needed and disassembled when not in use, which does not take up space and is convenient to disassemble and flexible to use.

[0052] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the concept and scope of the present utility model. Without departing from the design concept of the present utility model, all modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope of the present utility model. The technical content for which protection is sought in the present utility model has been fully described in the technical requirements.

Claims

1. A sampling structure for a handheld volatile gas analyzer, comprising an analyzer body and a sampling nozzle connected to the analyzer, characterized in that: It also includes a tube sleeve fitted over the sampling gun tube. The ends of the tube sleeve and the sampling gun tube near the analyzer body are detachably connected to the upper side of the analyzer body, and the sampling gun tube is in communication with the analyzer body. A hollow cylindrical spacer is provided inside the tube sleeve, and the spacer and the tube sleeve form an annular sandwich. The end of the spacer near the analyzer body is open and connected to the inner side of the tube sleeve along the circumference by several connecting rods. The end of the sampling gun tube away from the analyzer body is placed inside the tube sleeve. A primary filter screen is detachably provided at the end of the tube sleeve away from the analyzer body. A drying mechanism is detachably provided inside the sandwich layer at the end near the primary filter screen.

2. The sampling structure of the handheld volatile gas analyzer according to claim 1, characterized in that: The detachable connection structure between the primary filter and the tube end is as follows: a connecting ring is provided around the primary filter, the outer diameter of which is equal to the outer diameter of the tube; two connecting components are provided on the end face of the connecting ring away from the spacer, and the two connecting components are symmetrically arranged; the connecting components include two symmetrical fixed clamps with inverted L-shaped cross-sections, the horizontal ends of which are fixed to the connecting ring, and the vertical ends of which extend toward the primary filter; a groove is formed between the two fixed clamps; it also includes an elastic band, and a hook is provided on the side of the tube corresponding to each connecting component, one end of which is fixed to the hook, and the other end is connected to a T-shaped movable clamp, the vertical part of which is engaged in the groove, and the horizontal ends of which are engaged between the vertical part of the fixed clamp and the connecting ring.

3. The sampling structure of the handheld volatile gas analyzer according to claim 2, characterized in that: The drying mechanism includes an annular drying frame fitted within the interlayer, with a desiccant inside the drying frame. The sides of the drying frame near and away from the primary filter are both secondary filters. A fixing ring plate is provided on the side of the secondary filter near the analyzer body, and the fixing ring plate is detachably connected to the tube.

4. The sampling structure of the handheld volatile gas analyzer according to claim 3, characterized in that: The structure of the fixed ring plate detachably connected to the tube is as follows: the interlayer is provided with a limiting member with an L-shaped cross section corresponding to the fixed ring plate. The vertical upper end of the limiting member is connected to the top of the tube. Multiple tightening rings are provided on the outer circumference of the limiting member. The tightening rings are connected to the top of the tube by springs. The fixed ring plate is placed between the horizontal part of the limiting member and the tightening rings.

5. The sampling structure of the handheld volatile gas analyzer according to claim 4, characterized in that: The end of the fixed ring plate away from the secondary filter screen has a pointed cross-section.

6. The sampling structure of the handheld volatile gas analyzer according to claim 4, characterized in that: The vertical portion of the limiting member is provided with several through holes evenly distributed.

7. The sampling structure of the handheld volatile gas analyzer according to claim 3, characterized in that: A support ring is provided on the secondary filter screen away from the analyzer body, and a ring groove is provided on the primary filter screen corresponding to the support ring. The end of the support ring near the primary filter screen is placed in the ring groove.

8. The sampling structure of the handheld volatile gas analyzer according to claim 1, characterized in that: The analyzer body has a sleeve and a tube sleeve on its side corresponding to the tube and the sampling gun tube, respectively. The tube sleeve is located inside the sleeve, and the tube and the sampling gun tube are threaded into the sleeve and the tube sleeve, respectively.

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