Liftable gas sampling rod

Abstract

The utility model provides a liftable gas sampling rod which comprises a sampling sleeve with a fixed base in the middle, a sampling inner pipe coaxially arranged in the sampling sleeve, an isokinetic sampling head positioned above the sampling sleeve and connected to the upper end of the sampling inner pipe, and a hose arranged in the sampling inner pipe, the upper end part of the hose sleeves the bottom of the isokinetic sampling head and is communicated with the hollow cavity of the isokinetic sampling head, the lower end part of the hose extends out of the sampling inner tube, and the sampling sleeve is communicated with a sampling instrument; the sampling inner tube is inserted into the sampling sleeve in an up-down sliding manner, the locking mechanism comprising the inner tube fixing hole, the height adjusting holes and the lock pin is arranged, the height adjusting holes are distributed at intervals in the axial direction of the sampling inner tube, and the length of the part, extending out of the sampling sleeve, of the sampling inner tube can be changed by inserting the lock pin into different height adjusting holes; therefore, the height of the isodynamic sampling head is changed, sampling at different heights is realized, the flexibility is good, the reliability is high, the integration degree is high, the operation is convenient, and the popularization and the use are easy.

Description

Technical Field

[0001] This utility model belongs to the field of gas sampling technology, specifically relating to a liftable gas sampling rod. Background Technology

[0002] In fields such as industrial production, environmental monitoring, and laboratory analysis, it is often necessary to collect environmental gas samples. This type of sampling is mostly achieved through sampling rods. The sampling rod is an important connecting device between the ambient air and the sampling instrument, and it is also an important component of the environmental gas monitoring system. Most existing sampling rods are fixed-length sampling rods with a fixed sampling height, which makes it difficult to adjust according to on-site requirements and environmental changes. This limits the flexibility of sampling and reduces the overall reliability of the environmental gas monitoring system. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a liftable gas sampling rod.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is a liftable gas sampling rod, comprising:

[0005] A sampling sleeve, wherein a fixed base for connecting a sampling instrument is provided in the middle of the sampling sleeve;

[0006] A sampling inner tube, which is coaxially disposed inside the sampling sleeve;

[0007] An isodynamic sampling head is located above the sampling sleeve and connected to the upper end of the inner sampling tube;

[0008] The hose is located inside the sampling inner tube. The upper end of the hose is sleeved on the bottom of the isodynamic sampling head and communicates with the hollow cavity of the isodynamic sampling head. The lower end extends out of the sampling inner tube and the sampling sleeve and communicates with the sampling instrument.

[0009] The sampling inner tube is slidably inserted into the sampling sleeve. The liftable gas sampling rod also includes a locking mechanism for locking the relative position of the sampling inner tube and the sampling sleeve. The locking mechanism includes an inner tube fixing hole opened on the sampling sleeve, a height adjustment hole opened on the sampling inner tube, and a locking pin. There are multiple height adjustment holes, which are spaced apart along the axial direction of the sampling inner tube. When the locking pin is inserted into the inner tube fixing hole and the height adjustment hole, the relative position of the sampling inner tube and the sampling sleeve is locked.

[0010] Preferably, the inner tube fixing hole is located above the fixing base.

[0011] Preferably, there are multiple inner tube fixing holes, and the multiple inner tube fixing holes are distributed at intervals along the axial direction of the sampling sleeve.

[0012] Preferably, the sampling sleeve has an anti-rotation locking hole, which is a through hole located on the opposite side of the inner tube fixing hole, and an anti-rotation bolt is threaded into the anti-rotation locking hole.

[0013] More preferably, the sampling inner tube is provided with an anti-rotation locking groove, the anti-rotation locking groove is a blind groove and is located on the opposite side of the height adjustment hole, the anti-rotation locking groove extends along the axial direction of the sampling inner tube, and the end of the anti-rotation bolt is inserted into the anti-rotation locking groove and slidably connected to the anti-rotation locking groove.

[0014] More preferably, the anti-rotation lock groove penetrates the lower end face of the sampling inner tube.

[0015] Preferably, the isodynamic sampling head has a sampling end located above the inner sampling tube and an insertion end inserted into the upper end of the inner sampling tube. The outer wall of the insertion end is provided with multiple annular barbs, so that the insertion end forms a pagoda head structure. The upper end of the flexible tube is sleeved on the pagoda head structure.

[0016] More preferably, the hollow cavity within the sampling end is shaped like an upward-opening trumpet.

[0017] Preferably, the lower end of the sampling sleeve is provided with an inwardly protruding inner annular flange, the inner diameter of which is less than or equal to the outer diameter of the sampling inner tube and greater than or equal to the outer diameter of the flexible tube.

[0018] Preferably, the fixed base includes a stress-reducing part and a connecting base plate. The stress-reducing part is a cone-shaped part with a smaller top and a larger bottom, and is fitted onto the outside of the sampling sleeve. The connecting base plate is connected to the bottom of the stress-reducing part. The middle part of the connecting base plate is provided with a through hole for the sampling sleeve to pass through. The outer contour of the connecting base plate is rectangular in the vertical direction. The four corners of the connecting base plate are provided with connecting bolt holes.

[0019] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0020] The adjustable gas sampling rod provided by this utility model includes a sampling sleeve with a fixed base in the middle, a sampling inner tube coaxially arranged inside the sampling sleeve, an isodynamic sampling head located above the sampling sleeve and connected to the upper end of the sampling inner tube, and a flexible tube disposed inside the sampling inner tube. The upper end of the flexible tube is sleeved on the bottom of the isodynamic sampling head and communicates with the hollow cavity of the isodynamic sampling head, and the lower end extends out of the sampling inner tube. The sampling sleeve communicates with the sampling instrument. By allowing the sampling inner tube to slide up and down inside the sampling sleeve, and by providing a locking mechanism including an inner tube fixing hole, a height adjustment hole, and a locking pin, multiple height adjustment holes are provided and spaced apart along the axial direction of the sampling inner tube. By inserting the locking pin into different height adjustment holes, the length of the sampling inner tube extending out of the sampling sleeve can be changed, thereby changing the height of the isodynamic sampling head, realizing sampling at different heights. The sampling flexibility is good, the overall reliability of the environmental gas monitoring system is high, and the adjustable gas sampling rod has high integration, is easy to operate, and is easy to promote and use. Attached Figure Description

[0021] Figure 1 This is a perspective view of a preferred embodiment of the present invention.

[0022] Figure 2 yes Figure 1 Front view diagram.

[0023] Figure 3 yes Figure 2 Cross-sectional view along the AA direction.

[0024] Figure 4 yes Figure 3 A magnified view of a portion of point B in the middle.

[0025] Figure 5 yes Figure 3 A magnified view of a portion of point C.

[0026] Figure 6 yes Figure 3 A magnified view of a portion of point D.

[0027] Figure 7 , 8 yes Figure 1 A three-dimensional schematic diagram of the sampling inner tube.

[0028] The components are: 10. Sampling sleeve; 11. Fixed base; 12. Inner tube fixing hole; 13. Anti-rotation locking hole; 14. Inner annular flange; 15. Stress relief part; 16. Connecting base plate; 17. Connecting bolt hole; 20. Sampling inner tube; 21. Height adjustment hole; 22. Anti-rotation locking groove; 30. Isodynamic sampling head; 31. Hollow cavity; 32. Sampling end; 33. Insertion end; 34. Annular barb; 40. Flexible tube. Detailed Implementation

[0029] like Figures 1 to 7 As shown, the liftable gas sampling rod provided by this utility model includes: a sampling sleeve 10, a sampling inner tube 20, an isodynamic sampling head 30, and a flexible tube 40. The sampling sleeve 10 has a fixed base 11 in the middle for connecting a sampling instrument. The sampling inner tube 20 is coaxially disposed inside the sampling sleeve 10. The isodynamic sampling head 30 is located above the sampling sleeve 10 and connected to the upper end of the sampling inner tube 20. The flexible tube 40 is disposed inside the sampling inner tube 20, with its upper end sleeved around the bottom of the isodynamic sampling head 30 and communicating with the hollow cavity 31 of the isodynamic sampling head 30. Its lower end extends out through the sampling inner tube 20 and the sampling sleeve 10, communicating with the sampling instrument. The sampling inner tube 20 is slidably inserted into the sampling sleeve 10. The liftable gas sampling rod also includes a mechanism for locking the sampling inner tube 20 and the sampling sleeve. The relative position locking mechanism includes an inner tube fixing hole 12 on the sampling sleeve 10, a height adjustment hole 21 on the sampling inner tube 20, and a locking pin (not shown in the figure). There are five height adjustment holes 21, which are spaced apart along the axial direction of the sampling inner tube 20. When the locking pin is inserted into the inner tube fixing hole 12 and the height adjustment hole 21, the relative position of the sampling inner tube 20 and the sampling sleeve 10 is locked. By inserting the locking pin into different height adjustment holes 21, the length of the sampling inner tube 20 extending out of the sampling sleeve 10 can be changed, thereby changing the height of the isodynamic sampling head 30, realizing sampling at different heights. The sampling flexibility is good, the overall reliability of the environmental gas monitoring system is high, and the liftable gas sampling rod has high integration, is easy to operate, and is easy to promote and use.

[0030] In this embodiment, the inner tube fixing hole 12 is located above the fixing base 11; there are two inner tube fixing holes 12, which are spaced apart along the axial direction of the sampling sleeve 10; to prevent the sampling inner tube 20 from rotating axially relative to the sampling sleeve 10, the sampling sleeve 10 is further provided with an anti-rotation locking hole 13, which is a through hole located on the opposite side of the inner tube fixing hole 12, and an anti-rotation bolt (not shown in the figure) is threaded into the anti-rotation locking hole 13.

[0031] To further enhance the anti-rotation effect, an anti-rotation locking groove 22 is provided on the sampling inner tube 20. The anti-rotation locking groove 22 is a blind groove and is located on the opposite side of the height adjustment hole 21. The anti-rotation locking groove 22 extends along the axial direction of the sampling inner tube 20. The end of the anti-rotation bolt is inserted into the anti-rotation locking groove 22 and is slidably connected to the anti-rotation locking groove 22. To facilitate the insertion and removal of the sampling inner tube 20, in this embodiment, the anti-rotation locking groove 22 penetrates through the lower end face of the sampling inner tube 20.

[0032] In this embodiment, the isodynamic sampling head 30 has a sampling end 32 located above the sampling inner tube 20 and an insertion end 33 inserted into the upper end of the sampling inner tube 20. The outer wall of the insertion end 33 is provided with multiple annular barbs 34, so that the insertion end 33 forms a pagoda head structure. The upper end of the flexible tube 40 is sleeved on the pagoda head structure. To facilitate gas collection, the hollow cavity 31 inside the sampling end 32 is further shaped like an upwardly opening trumpet.

[0033] To prevent the sampling inner tube 20 from falling off and to facilitate the extension of the flexible tube 40, in this embodiment, the lower end of the sampling sleeve 10 is provided with an inwardly protruding inner annular flange 14, the inner diameter of which is less than or equal to the outer diameter of the sampling inner tube 20 and greater than or equal to the outer diameter of the flexible tube 40.

[0034] To facilitate connection and reduce stress concentration, in this embodiment, the fixed base 11 includes a stress-reducing part 15 and a connecting base plate 16. The stress-reducing part 15 is a cone-shaped part with a smaller top and a larger bottom, and is fitted onto the outside of the sampling sleeve 10. The connecting base plate 16 is connected to the bottom of the stress-reducing part 15. The middle part of the connecting base plate 16 is provided with a through hole for the sampling sleeve 10 to pass through. The projection of the outer contour of the connecting base plate 16 in the vertical direction is rectangular. The four corners of the connecting base plate 16 are provided with connecting bolt holes 17.

[0035] The above are merely embodiments of this utility model. Those skilled in the art can make appropriate changes and improvements to this utility model without departing from its technical scope. The above embodiments are only for illustrating the technical concept and features of this invention, and are intended to enable those skilled in the art to understand and implement the content of this invention. They should not be construed as limiting the scope of protection of this invention. All equivalent changes or modifications made according to the spirit and essence of this invention should be covered within the scope of protection of this invention.

Claims

1. A liftable gas sampling rod, comprising: A sampling sleeve, wherein a fixed base for connecting a sampling instrument is provided in the middle of the sampling sleeve; A sampling inner tube, which is coaxially disposed inside the sampling sleeve; An isodynamic sampling head is located above the sampling sleeve and connected to the upper end of the inner sampling tube; The hose is located inside the sampling inner tube. The upper end of the hose is sleeved on the bottom of the isodynamic sampling head and communicates with the hollow cavity of the isodynamic sampling head. The lower end extends out of the sampling inner tube and the sampling sleeve and communicates with the sampling instrument. Its features are: The sampling inner tube is slidably inserted into the sampling sleeve. The liftable gas sampling rod also includes a locking mechanism for locking the relative position of the sampling inner tube and the sampling sleeve. The locking mechanism includes an inner tube fixing hole opened on the sampling sleeve, a height adjustment hole opened on the sampling inner tube, and a locking pin. There are multiple height adjustment holes, which are spaced apart along the axial direction of the sampling inner tube. When the locking pin is inserted into the inner tube fixing hole and the height adjustment hole, the relative position of the sampling inner tube and the sampling sleeve is locked.

2. The liftable gas sampling rod according to claim 1, characterized in that: The inner tube fixing hole is located above the fixing base.

3. The liftable gas sampling rod according to claim 1, characterized in that: The inner tube has multiple fixing holes, which are spaced apart along the axial direction of the sampling sleeve.

4. The liftable gas sampling rod according to claim 1, characterized in that: The sampling sleeve has an anti-rotation locking hole, which is a through hole and is located on the opposite side of the inner tube fixing hole. An anti-rotation bolt is threaded into the anti-rotation locking hole.

5. The liftable gas sampling rod according to claim 4, characterized in that: The sampling inner tube is provided with an anti-rotation locking groove. The anti-rotation locking groove is a blind groove and is located on the opposite side of the height adjustment hole. The anti-rotation locking groove extends along the axial direction of the sampling inner tube. The end of the anti-rotation bolt is inserted into the anti-rotation locking groove and is slidably connected to the anti-rotation locking groove.

6. The liftable gas sampling rod according to claim 5, characterized in that: The anti-rotation lock groove penetrates the lower end face of the sampling inner tube.

7. The liftable gas sampling rod according to claim 1, characterized in that: The isodynamic sampling head has a sampling end located above the sampling inner tube and an insertion end inserted into the upper end of the sampling inner tube. The outer wall of the insertion end is provided with multiple annular barbs, so that the insertion end forms a pagoda head structure. The upper end of the flexible tube is sleeved on the pagoda head structure.

8. The liftable gas sampling rod according to claim 7, characterized in that: The hollow cavity inside the sampling end is shaped like an upward-opening trumpet.

9. The liftable gas sampling rod according to claim 1, characterized in that: The lower end of the sampling sleeve is provided with an inwardly protruding inner annular flange, the inner diameter of which is less than or equal to the outer diameter of the sampling inner tube and greater than or equal to the outer diameter of the flexible tube.

10. The liftable gas sampling rod according to claim 1, characterized in that: The fixed base includes a stress-reducing part and a connecting base plate. The stress-reducing part is a cone-shaped part with a smaller top and a larger bottom, and is fitted onto the outside of the sampling sleeve. The connecting base plate is connected to the bottom of the stress-reducing part. The middle part of the connecting base plate has a through hole for the sampling sleeve to pass through. The outer contour of the connecting base plate is rectangular in the vertical direction. The four corners of the connecting base plate have connecting bolt holes.

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