A filter guide structure for an oxygen analyzer

Abstract

This invention provides a filtration and flow guiding structure for an oxygen analyzer, including a filtration assembly. The filtration assembly comprises a filter box, U-shaped slots, a mounting plate, filter holes, a coarse filter, a fine filter, a limiting ring, an inlet pipe, an outlet pipe, a mounting groove, and a limiting component. U-shaped slots are provided on both sides of the upper surface of the filter box, and the mounting plate is slidably connected to the inner sidewalls of both U-shaped slots. This invention utilizes a two-stage filtration structure with coarse and fine filters. The coarse filter intercepts larger particles, while the fine filter intercepts smaller particles. The limiting ring secures the filter, effectively improving the filtration effect and preventing sensor clogging that could reduce measurement accuracy. The limiting component, in conjunction with a push-out spring, allows for quick filter removal and replacement during installation by automatically engaging the limiting hole with the beveled part of the limiting block. During disassembly, pulling the lever releases the limiting mechanism, and the push-out spring helps eject the mounting plate, enabling rapid filter removal and replacement, facilitating cleaning and replacement, and improving detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of gas analysis equipment technology, and in particular to a filter guide structure for an oxygen analyzer. Background Technology

[0002] An oxygen analyzer is a precision instrument that performs quantitative analysis by detecting the oxygen concentration in a gas. Its core function is to use sensors based on electrochemical, zirconium oxide, or paramagnetic principles to convert the partial pressure of oxygen in the gas into an electrical signal, thereby enabling real-time monitoring of oxygen content. As a key piece of equipment for industrial process control and safety monitoring, oxygen analyzers are widely used in boiler combustion optimization, chemical reaction monitoring, medical gas preparation, and environmental waste gas detection. Their measurement accuracy and stability directly affect production efficiency, energy consumption, and environmental performance. In industrial combustion systems, accurate oxygen content detection can optimize the air-fuel ratio, reducing energy consumption by 10%-15%. In environmental monitoring, it can control the oxygen concentration in waste gas emissions in real time, ensuring compliance with emission standards.

[0003] Existing oxygen analyzer filter flow structure relies on only a single filter layer, which cannot effectively intercept particulate matter such as soot and dust, easily leading to sensor clogging and decreased measurement accuracy. Moreover, the filter screen is relatively troublesome to install and remove, making it inconvenient to clean or replace the filter screen, which is not only time-consuming and labor-intensive, but also reduces detection efficiency. Therefore, a new oxygen analyzer filter flow structure is proposed. Utility Model Content

[0004] In view of this, the present invention aims to provide a filter guide structure for an oxygen analyzer to solve or alleviate the technical problems existing in the prior art, or at least provide a beneficial alternative.

[0005] The technical solution of this utility model embodiment is implemented as follows: an oxygen analyzer filter guide structure includes a filter assembly, wherein the filter assembly includes a filter box, a U-shaped slot, a mounting plate, filter holes, a coarse filter screen, a fine filter screen, a limiting ring, an air inlet pipe, an air outlet pipe, a mounting groove, and a limiting component;

[0006] The filter box has U-shaped slots on both sides of its upper surface. Mounting plates are slidably connected to the inner walls of both U-shaped slots. Filter holes are located at the center of one side of each mounting plate. Coarse and fine filter screens are respectively attached to the center of the inner walls of the two filter holes. Limiting rings are threaded onto both sides of the inner walls of the filter holes. An air inlet pipe is connected to the center of the side of the filter box near the coarse filter screen, and an air outlet pipe is connected to the center of the side of the filter box near the fine filter screen. Mounting grooves are located on both sides of the upper part of the front and rear surfaces of the filter box, and limiting components are installed on the inner walls of the mounting grooves.

[0007] More preferably, the limiting component includes a limiting shell, a sliding block, a limiting insert block, a limiting insert hole, a pull rod, a return spring, and a pull button;

[0008] The outer wall of the limiting shell is fixedly connected to the inner wall of the mounting groove. A sliding block is slidably connected to the inner wall of the limiting shell. A limiting insert is fixedly connected to the center of the side of the sliding block near the mounting plate. The end of the limiting insert away from the sliding block passes through the center of the inner wall of the limiting shell near the mounting plate. Limiting holes are provided on the upper part of the front and rear surfaces of the mounting plate. The outer wall of the limiting insert is slidably connected to the inner wall of the limiting hole. A pull rod is fixedly connected to the center of the side of the sliding block away from the mounting plate. The end of the pull rod away from the sliding block passes through the center of the inner wall of the limiting shell away from the limiting insert. A return spring is sleeved on the outer wall of the pull rod. One end of the return spring is attached to the side of the sliding block near the pull rod, and the other end of the return spring is attached to the side of the inner wall of the limiting shell away from the mounting plate. A pull button is fixedly connected to the end of the pull rod away from the sliding block.

[0009] More preferably, the mounting plate has mounting holes at both the front and rear of its lower surface. An ejector spring is fitted to the inner top wall of the mounting hole. A limit block is fixedly connected to the bottom of the ejector spring. A push rod is fixedly connected to the center of the lower surface of the limit block. The bottom of the push rod is fitted to the inner bottom wall of the U-shaped slot. A limit ring is fixedly connected to the bottom of the inner side wall of the mounting hole. The outer side of the lower surface of the limit block is fitted to the upper surface of the limit ring.

[0010] More preferably, the upper surface of the limiting plug is provided with a beveled part at the end near the mounting plate.

[0011] More preferably, the inner sidewalls of the filter box are fixedly connected with air guides on both sides near the outer sides of the air inlet and air outlet pipes.

[0012] More preferably, annular grooves are provided on the outer side of the air inlet pipe and the air outlet pipe on opposite sides, and a swivel nut is rotatably connected to the inner side of the annular groove. A sealing gasket is fixedly connected to the opposite end of the air inlet pipe and the air outlet pipe.

[0013] More preferably, sealing grooves are provided on both outer sides of the mounting plate, and sealing rings are fixedly connected to the inner sidewalls of the two sealing grooves. The opposite sides of the two sealing rings are respectively attached to the inner sidewalls of the U-shaped slot.

[0014] More preferably, a guide plate is fixedly connected to the inner wall of the air outlet pipe on the side away from the filter box, and a plurality of guide holes are opened on one side of the guide plate.

[0015] The present invention has the following advantages due to the adoption of the above technical solution:

[0016] 1. This utility model has a two-stage filtration structure with a coarse filter and a fine filter. The coarse filter intercepts larger particles of impurities, while the fine filter intercepts tiny particles. The filter is fixed by a limiting ring, which effectively improves the filtration effect and avoids the sensor from being blocked by impurities, thus reducing the measurement accuracy.

[0017] 2. This utility model uses a limiting component and an ejector spring to cooperate. During installation, the inclined part of the limiting plug automatically engages with the limiting plug hole for fixation. During disassembly, pulling the button releases the limiting, and the ejector spring helps to pop out the mounting plate, enabling quick disassembly and assembly of the filter screen, facilitating cleaning and replacement, and improving testing efficiency.

[0018] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is an overall structural diagram of the present invention;

[0021] Figure 2 This is a cross-sectional view of the present invention.

[0022] Figure 3 This is a cross-sectional view of the present invention from another perspective;

[0023] Figure 4 This is a structural diagram of the filter box and mounting plate of this utility model;

[0024] Figure 5 This is a structural diagram of the mounting plate and the limiting ring of this utility model;

[0025] Figure 6 For the present utility model Figure 3 Enlarged view of area A;

[0026] Figure 7 For the present utility model Figure 3 Enlarged view of area B.

[0027] Reference numerals: 1. Filter assembly; 11. Filter box; 12. U-shaped slot; 13. Mounting plate; 14. Filter hole; 15. Coarse filter screen; 16. Fine filter screen; 17. Limiting ring; 18. Inlet pipe; 19. Outlet pipe; 20. Mounting groove; 2. Limiting assembly; 21. Limiting shell; 22. Sliding block; 23. Limiting insert block; 24. Limiting insertion hole; 25. Pull rod; 26. Return spring; 27. Pull button; 28. Mounting hole; 29. ​​Push-out spring; 30. Limiting block; 31. Push rod; 32. Limiting ring; 33. Beveled part; 34. Flow guide; 35. Annular groove; 36. Swivel nut; 37. Sealing gasket; 38. Sealing groove; 39. Sealing ring; 40. Flow guide plate; 41. Flow guide hole. Detailed Implementation

[0028] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0029] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0030] like Figures 1-7 As shown, this utility model embodiment provides an oxygen analyzer filter guide structure, including a filter assembly 1. The filter assembly 1 includes a filter box 11, a U-shaped slot 12, a mounting plate 13, filter holes 14, a coarse filter screen 15, a fine filter screen 16, a limiting ring 17, an air inlet pipe 18, an air outlet pipe 19, a mounting groove 20, and a limiting component 2.

[0031] U-shaped slots 12 are provided on both sides of the upper surface of the filter box 11. Mounting plates 13 are slidably connected to the inner walls of both U-shaped slots 12. Filter holes 14 are provided at the center of one side of each mounting plate 13. A coarse filter 15 and a fine filter 16 are respectively attached to the middle of the inner walls of the two filter holes 14. Limiting rings 17 are threaded onto both sides of the inner walls of the filter holes 14. An air inlet pipe 18 is connected to the center of the side of the filter box 11 closest to the coarse filter 15, and an air outlet pipe is connected to the center of the side of the filter box 11 closest to the fine filter 16. The air tube 19 and the filter box 11 have mounting grooves 20 on both sides of the upper part of the front and rear surfaces. The inner side wall of the mounting groove 20 is equipped with a limiting component 2. The coarse filter 15 is made of metal wire mesh, which can filter larger particles of impurities, such as dust with a particle size greater than 50μm. The fine filter 16 is made of PTFE (polytetrafluoroethylene), and its pore size can reach 0.1μm, which can effectively intercept small particles and aerosols. Through two-stage filtration, the purity of the sample gas entering the oxygen analyzer detection area can be ensured to reach more than 99.9%.

[0032] In one embodiment, the limiting component 2 specifically includes a limiting shell 21, a sliding block 22, a limiting insert block 23, a limiting insert hole 24, a pull rod 25, a return spring 26, and a pull button 27.

[0033] The outer wall of the limiting shell 21 is fixedly connected to the inner wall of the mounting groove 20. A sliding block 22 is slidably connected to the inner wall of the limiting shell 21. A limiting insert 23 is fixedly connected to the center of the side of the sliding block 22 closest to the mounting plate 13. The end of the limiting insert 23 away from the sliding block 22 passes through the center of the inner wall of the limiting shell 21 closest to the mounting plate 13. Limiting holes 24 are provided on the upper part of the front and rear surfaces of the mounting plate 13. The outer wall of the limiting insert 23 is slidably connected to the inner wall of the limiting hole 24. A pull rod 25 is fixedly connected to the center of the side of the sliding block 22 away from the mounting plate 13. The pull rod 25 is fixedly connected to the center of the side of the sliding block 22 away from the mounting plate 13. One end of the movable block 22 passes through the center of the inner side wall of the limiting shell 21 away from the center of the limiting insert block 23. A return spring 26 is sleeved on the outer side wall of the pull rod 25. One end of the return spring 26 is attached to the side of the sliding block 22 near the pull rod 25, and the other end of the return spring 26 is attached to the inner side wall of the limiting shell 21 away from the mounting plate 13. A pull button 27 is fixedly connected to the end of the pull rod 25 away from the sliding block 22. The pull button 27 facilitates pulling the pull rod 25, thereby moving the sliding block 22 and the limiting insert block 23, so that the limiting insert block 23 moves out of the limiting insertion hole 24 and releases the limiting fixation of the mounting plate 13.

[0034] In one embodiment, specifically: mounting holes 28 are provided at the front and rear of the lower surface of the mounting plate 13. An ejector spring 29 is attached to the inner top wall of the mounting hole 28. A limit block 30 is fixedly connected to the bottom of the ejector spring 29. A push rod 31 is fixedly connected to the center of the lower surface of the limit block 30. The bottom of the push rod 31 is attached to the inner bottom wall of the U-shaped slot 12. A limit ring 32 is fixedly connected to the bottom of the inner side wall of the mounting hole 28. The outer side of the lower surface of the limit block 30 is attached to the upper surface of the limit ring 32. The limit ring 32 limits the limit block 30, thereby preventing the limit block 30 from coming out of the mounting hole 28.

[0035] In one embodiment, specifically: the upper surface of the limiting plug 23 near the end of the mounting plate 13 is provided with a beveled part 33, which facilitates the movement of the limiting plug 23 by squeezing it when the mounting plate 13 is inserted.

[0036] In one embodiment, specifically: both sides of the inner wall of the filter box 11 are fixedly connected with a flow guide 34 near the outer side of the air inlet pipe 18 and the air outlet pipe 19. The flow guide 34 on the side of the air inlet pipe 18 facilitates the guidance of diffused gas to the coarse filter screen 15 for filtration, and the flow guide 34 on the side of the air outlet pipe 19 facilitates the concentrated guidance and delivery of gas to the air outlet pipe 19.

[0037] In one embodiment, specifically: annular grooves 35 are provided on the outer side of the air inlet pipe 18 and the air outlet pipe 19 that are far apart. A swivel nut 36 is rotatably connected to the inner side of the annular groove 35. A sealing gasket 37 is fixedly connected to the outer side of the air inlet pipe 18 and the air outlet pipe 19 that are far apart. The swivel nut 36 is limited by the annular groove 35, thereby ensuring that the swivel nut 36 rotates stably. The sealing gasket 37 at the end of the air inlet pipe 18 ensures the airtightness of the connection and prevents gas leakage.

[0038] In one embodiment, specifically: sealing grooves 38 are provided on both outer sides of the mounting plate 13, and sealing rings 39 are fixedly connected to the inner walls of the two sealing grooves 38. The opposite sides of the two sealing rings 39 are respectively attached to the inner walls of the U-shaped slot 12. By the sealing rings 39 in the sealing grooves 38 on both sides of the mounting plate 13 being attached to the inner walls of the U-shaped slot 12, the airtightness of the filter box 11 is ensured.

[0039] In one embodiment, specifically: a guide plate 40 is fixedly connected to the inner wall of the air outlet pipe 19 away from the filter box 11. A plurality of guide holes 41 are opened on one side of the guide plate 40. Through the diversion effect of the guide plate 40 on the inner side of the air outlet pipe 19 and the plurality of guide holes 41 on the guide plate 40, the gas flow is made more stable and uniform.

[0040] In operation, this invention works as follows: The gas to be tested is securely connected to an external pipe via a swivel nut 36 on the outer side of the intake pipe 18, allowing the gas to be tested to be delivered to the intake pipe 18 through the external pipe and enter the filter box 11. After entering the filter box 11, the gas is guided by a flow guide shroud 34 near the intake pipe 18 on the inner wall of the filter box 11, flowing towards the coarse filter screen 15 mounted on the left mounting plate 13. As the gas passes through the coarse filter screen 15, larger particles of impurities are intercepted, completing the initial filtration. The gas, after coarse filtration, continues to flow within the filter box 11, flowing towards the fine filter screen 16 mounted on the right mounting plate 13. 16. Intercepts fine particulate impurities for deep filtration; the filtered clean gas enters the outlet pipe 19 under the guidance of the right-side guide hood 34. Through the diversion effect of the guide plate 40 and multiple guide holes 41 on the inner side of the outlet pipe 19, the gas flow becomes more stable and uniform, and is finally delivered to the oxygen analyzer for detection. When cleaning or replacing the filter screen is required, pull the button 27 on the front / rear surface of the filter box 11. The pull rod 25 drives the sliding block 22 to slide away from the mounting plate 13, causing the limiting insert 23 to disengage from the limiting insert hole 24, releasing the limitation on the mounting plate 13. After the limitation is released... The compressed ejector spring 29 inside the mounting hole 28 rebounds, pushing the limiting block 30 and the push rod 31 downwards. The push rod 31 lifts the mounting plate 13 upwards a certain distance, making it easy for the operator to directly remove the mounting plate 13 and clean the filter screen installed on the mounting plate 13. If the filter screen needs to be replaced, unscrew the limiting ring 17 on either side of the filter hole 14 and replace it with a new coarse filter screen 15 or fine filter screen 16. After cleaning or replacing the filter screen, align the mounting plate 13 with the U-shaped slot 12 on the upper surface of the filter box 11 and insert it vertically downwards. When the mounting plate 13 is inserted, its side presses against the limiting block. The inclined portion 33 of the insert block 23 forces the limiting insert block 23 to slide the sliding block 22 towards the inner side of the limiting shell 21, while compressing the return spring 26. During the insertion process, the push rod 31 on the lower surface of the mounting plate 13 contacts and is squeezed against the inner bottom wall of the U-shaped slot 12. The push rod 31 pushes the limiting block 30 to compress the ejection spring 29 in the mounting hole 28. When the mounting plate 13 is fully inserted into the designated position, the limiting insertion hole 24 on the mounting plate 13 aligns with the limiting insert block 23. The return spring 26 rebounds, pushing the sliding block 22 to insert the limiting insert block 23 into the limiting insertion hole 24, thus completing the fixing of the mounting plate 13.

[0041] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. An oxygen analyzer filter flow guide structure, characterized by: The filter assembly (1) includes a filter box (11), a U-shaped slot (12), a mounting plate (13), a filter hole (14), a coarse filter screen (15), a fine filter screen (16), a limiting ring (17), an air inlet pipe (18), an air outlet pipe (19), a mounting groove (20), and a limiting component (2). The filter box (11) has U-shaped slots (12) on both sides of its upper surface. The inner walls of the two U-shaped slots (12) are slidably connected to mounting plates (13). The center of one side of each mounting plate (13) is provided with a filter hole (14). The middle part of the inner wall of each filter hole (14) is respectively fitted with a coarse filter (15) and a fine filter (16). The inner walls of the filter holes (14) are threaded with limit rings (17). The center of the side of the filter box (11) near the coarse filter (15) is connected to an air inlet pipe (18). The center of the side of the filter box (11) near the fine filter (16) is connected to an air outlet pipe (19). The upper sides of the front and rear surfaces of the filter box (11) are provided with mounting grooves (20). The inner walls of the mounting grooves (20) are equipped with limit components (2).

2. The filtering flow guide structure of an oxygen analyzer according to claim 1, wherein: The limiting component (2) includes a limiting shell (21), a sliding block (22), a limiting plug (23), a limiting plug hole (24), a pull rod (25), a return spring (26), and a pull button (27). The outer wall of the limiting shell (21) is fixedly connected to the inner wall of the mounting groove (20). A sliding block (22) is slidably connected to the inner wall of the limiting shell (21). A limiting insert (23) is fixedly connected to the center of the side of the sliding block (22) near the mounting plate (13). The end of the limiting insert (23) away from the sliding block (22) passes through the center of the inner wall of the limiting shell (21) near the mounting plate (13). Limiting holes (24) are opened on the upper part of the front and rear surfaces of the mounting plate (13). The outer wall of the limiting insert (23) is slidably connected to the inner wall of the limiting hole (24). 2) A pull rod (25) is fixedly connected to the center of the side away from the mounting plate (13). The end of the pull rod (25) away from the sliding block (22) passes through the center of the inner wall of the limiting shell (21) away from the limiting insert (23). A return spring (26) is sleeved on the outer wall of the pull rod (25). One end of the return spring (26) is attached to the side of the sliding block (22) near the pull rod (25). The other end of the return spring (26) is attached to the side of the inner wall of the limiting shell (21) away from the mounting plate (13). A pull button (27) is fixedly connected to the end of the pull rod (25) away from the sliding block (22).

3. The filtering flow guide structure of an oxygen analyzer according to claim 1, wherein: The mounting plate (13) has mounting holes (28) at the front and rear of its lower surface. An ejector spring (29) is attached to the inner top wall of the mounting hole (28). A limit block (30) is fixedly connected to the bottom of the ejector spring (29). A push rod (31) is fixedly connected to the center of the lower surface of the limit block (30). The bottom of the push rod (31) is attached to the inner bottom wall of the U-shaped slot (12). A limit ring (32) is fixedly connected to the bottom of the inner side wall of the mounting hole (28). The outer side of the lower surface of the limit block (30) is attached to the upper surface of the limit ring (32).

4. The filtering flow guide structure of an oxygen analyzer according to claim 2, wherein: The upper surface of the limiting plug (23) near the mounting plate (13) is provided with a beveled part (33).

5. The filtering flow guide structure of an oxygen analyzer according to claim 1, wherein: The inner sidewalls of the filter box (11) are fixedly connected with flow guides (34) on both sides near the outer side of the air inlet pipe (18) and the air outlet pipe (19).

6. The filtering flow guide structure of an oxygen analyzer according to claim 5, wherein: An annular groove (35) is provided on the outer side of the air inlet pipe (18) and the air outlet pipe (19) on the side away from each other. A swivel nut (36) is rotatably connected to the inner side of the annular groove (35). A sealing gasket (37) is fixedly connected to the outer side of the air inlet pipe (18) and the air outlet pipe (19) on the side away from each other.

7. The filtering flow guide structure of an oxygen analyzer according to claim 1, wherein: The mounting plate (13) has sealing grooves (38) on both outer sides. The inner walls of the two sealing grooves (38) are fixedly connected with sealing rings (39). The two sealing rings (39) are respectively attached to the inner walls of the U-shaped slot (12) on opposite sides.

8. The filtering flow guide structure of an oxygen analyzer according to claim 1, wherein: A guide plate (40) is fixedly connected to the inner side wall of the air outlet pipe (19) away from the filter box (11), and a plurality of guide holes (41) are opened on one side of the guide plate (40).

Images