A gas container structure and a flue gas analyzer

Abstract

This invention discloses a gas-capacity structure and a flue gas analyzer. The gas-capacity structure includes an elastic gas-capacity shell, within which an elastic gas-capacity cavity is disposed. The elastic gas-capacity shell has an inlet and an outlet communicating with the elastic gas-capacity cavity. A nozzle body is disposed within the inlet. The nozzle body includes an elastic tube, and a lip structure is disposed at the end of the elastic tube. The lip structure has a contraction guide portion and an elastic airflow port. The contraction guide portion is located within the elastic tube, and the elastic airflow port communicates with the end of the contraction guide portion and is connected to the elastic gas-capacity cavity. The elastic airflow port opens and expands outward when airflow acts in the forward direction on the lip structure, and contracts inward when airflow acts in the reverse direction on the lip structure. The flue gas analyzer also includes the gas-capacity structure. This invention applies to the technical field of environmental gas detection.

Description

Technical Field

[0001] This invention relates to the technical field of environmental gas detection, and in particular to a gas capacity structure and a flue gas analyzer. Background Technology

[0002] A flue gas analyzer is a device that uses electrochemical sensors to continuously analyze and measure the content of flue gas. It is mainly used for environmental monitoring of pollution emissions from small oil-fired and gas-fired boilers or near pollution sources.

[0003] When flue gas analyzers sample stationary pollution sources, the airflow within the flue contains eddies and pulsations, and the analyzer's pump generates periodic pressure during operation. These fluctuations in airflow and pressure lead to instability and inaccurate measurement results. Therefore, a gas-capacity structure is needed within the analyzer to stabilize the airflow. However, existing gas-capacity structures are susceptible to eddy-induced vibrations, which in turn affect flow pressure fluctuations and cause flow rate fluctuations. Secondly, the airflow may flow in the opposite direction, interfering with the upstream airflow and affecting its stability. Furthermore, the required volume of the gas-capacity structure is directly proportional to the flow rate; the larger the flow rate, the larger the required volume, resulting in a large gas-capacity structure, which is detrimental to the miniaturization design of the instrument. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art. The primary objective is to provide a gas-capacity structure that can eliminate reverse airflow interference, has good flow stabilization effect, and is compact in structure. The second objective of this invention is to provide a flue gas analyzer that can eliminate reverse airflow interference, has good flow stabilization effect, and has a compact structure.

[0005] The technical solution adopted in this invention is as follows: the gas-capacity structure includes an elastic gas-capacity shell, an elastic gas-capacity cavity is provided in the elastic gas-capacity shell, an air inlet and an air outlet communicating with the elastic gas-capacity cavity are provided on the elastic gas-capacity shell, a nozzle body is provided in the air inlet, the nozzle body includes an elastic tube, a lip structure is provided at the end of the elastic tube, the lip structure has a contraction guide and an elastic airflow port, the contraction guide is located in the elastic tube, the elastic airflow port is connected to the end of the contraction guide and is connected to the elastic gas-capacity cavity, the elastic airflow port opens and spreads outward when the airflow acts in the forward direction on the lip structure, and the elastic airflow port contracts inward when the airflow acts in the reverse direction on the lip structure.

[0006] Furthermore, the lip structure includes a plurality of lip units arranged sequentially. Each lip unit includes an airflow port seat. Both sides of the airflow port seat are provided with inclined contraction surfaces. The inclined contraction surfaces of the lip unit are connected to the inclined contraction surfaces of the adjacent lip units. The contraction guide and the elastic airflow port are respectively located at both ends of the plurality of airflow port seats.

[0007] Furthermore, the elastic airflow port is in the shape of a straight line or a cross.

[0008] Furthermore, the contraction guide portion includes a plurality of conical guide surfaces arranged sequentially, and the elastic airflow port is located between the plurality of conical guide surfaces.

[0009] Furthermore, the contraction guide includes two inclined guide surfaces arranged opposite to each other, and the elastic airflow port is located between the two inclined guide surfaces; or, the contraction guide includes a plurality of inclined guide surfaces arranged sequentially, and the elastic airflow port is located between the plurality of inclined guide surfaces.

[0010] Furthermore, the nozzle body is a one-piece molded structure, and the upper end of the elastic tube is provided with a flange, the lower end of which abuts against the upper end of the air inlet.

[0011] Furthermore, the elastic gas container housing includes an elastic gas container upper cover, an elastic gas container lower cover, and a thin film elastic pad. The elastic gas container upper cover is connected to the elastic gas container lower cover. The elastic gas container cavity is located between the elastic gas container upper cover and the elastic gas container lower cover. The thin film elastic pad is located in the elastic gas container cavity and is located inside the elastic gas container upper cover.

[0012] Furthermore, the elastic gas cavity is provided with a flow divider plate and two oppositely arranged guide inclined plates. The elastic air outlet is located between the two guide inclined plates and directly opposite the flow divider plate. Flow divider channels are provided on both sides of the flow divider plate and between the two guide inclined plates. Both flow divider channels are connected to the air outlet.

[0013] Furthermore, the gas capacity structure also includes a flow meter and a flow pump, wherein the flow meter is connected to the air inlet and the air outlet is connected to the flow pump.

[0014] In addition, the present invention also provides a flue gas analyzer, which includes the aforementioned gas capacity structure.

[0015] The beneficial effects of this invention are: Compared to the shortcomings of existing technologies, in this invention, the greater the airflow pressure in the elastic tube, the greater the opening degree of the lip structure, resulting in stronger flow capacity. This allows for adaptive adjustment of flowability based on airflow pressure, helping to reduce forward pressure loss. Secondly, when reverse airflow attempts to flow into the elastic tube through the elastic airflow port, the reverse pressure causes the lip structure to fit tightly, and the greater the pressure, the better the sealing effect of the elastic airflow port. Furthermore, when the airflow pressure in the elastic tube increases, the inner wall of the elastic tube deforms outward to absorb excess gas and pressure, preventing a sudden increase in downstream flow. When the airflow pressure in the elastic tube decreases, the elastic... The inner wall of the tube contracts under its own rebound force to release the stored gas, thereby replenishing the downstream flow and maintaining flow stability. This process effectively mitigates the influence of eddy current vibration to avoid flow fluctuations. In addition, the nozzle body with a lip structure greatly suppresses reverse interference and pressure oscillation, so that the airflow transmitted to the elastic gas container has been pre-stabilized, greatly reducing the buffer load required by the elastic gas container. A smaller volume can achieve the same level of flow stabilization effect, realizing the miniaturization design of the instrument. This makes the gas container structure have the advantages of eliminating reverse airflow interference, good flow stabilization effect and compact structure. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is an exploded structural diagram of the present invention; Figure 3 This is a three-dimensional structural diagram of the nozzle body of the present invention. Figure 1 ; Figure 4 This is a cross-sectional structural schematic diagram of the nozzle body of the present invention; Figure 5 This is a three-dimensional structural diagram of the nozzle body of the present invention. Figure 2 ; Figure 6 This is a three-dimensional structural diagram of the nozzle body of the present invention. Figure 3 ; Figure 7 This is a three-dimensional structural diagram of the elastic gas-filled lower cover of the present invention.

[0018] The attached figures are labeled as follows: 1. Elastic gas container housing; 2. Elastic gas container cavity; 3. Air inlet; 4. Air outlet; 5. Nozzle body; 6. Elastic tube body; 7. Lip structure; 8. Contraction guide; 9. Elastic air outlet; 10. Lip unit; 11. Air outlet seat; 12. Inclined contraction surface; 13. Conical guide surface; 14. Inclined guide surface; 15. Flange; 16. Elastic gas container upper cover; 17. Elastic gas container lower cover; 18. Thin film elastic pad; 19. Diverter plate; 20. Guide inclined plate; 21. Diverter channel; 22. Flow meter; 23. Flow pump.

[0019] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, clockwise, counterclockwise, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0022] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0023] like Figures 1 to 5As shown, in this embodiment, the gas container structure includes an elastic gas container shell 1, an elastic gas container cavity 2 is provided in the elastic gas container shell 1, an air inlet 3 and an air outlet 4 communicating with the elastic gas container cavity 2 are provided on the elastic gas container shell 1, a nozzle body 5 is provided in the air inlet 3, the nozzle body 5 includes an elastic tube 6, a lip structure 7 is provided at the end of the elastic tube 6, the lip structure 7 has a contraction guide part 8 and an elastic airflow port 9, the contraction guide part 8 is located in the elastic tube 6, the elastic airflow port 9 is connected to the end of the contraction guide part 8 and is connected to the elastic gas container cavity 2, the elastic airflow port 9 opens and spreads outward when the airflow acts in the forward direction on the lip structure 7, and the elastic airflow port 9 contracts inward when the airflow acts in the reverse direction on the lip structure 7. The shrinkage guide 8 is located in the elastic tube 6, so that the elastic tube 6 has a gas flow channel that gradually narrows along the gas flow direction; the elastic tube 6 and the elastic gas container shell 1 can be made of silicone rubber, polyurethane or thermoplastic elastomer.

[0024] Under normal conditions, the elastic airflow port 9 is sealed to prevent airflow from flowing back from the elastic air cavity 2 into the nozzle body 5; Forward flow: During the process of airflow into the nozzle body 5, pressure is applied to the lip structure 7, forcing the lip structure 7 to open and open the elastic airflow port 9, forming an airflow channel, so that the airflow can smoothly pass through the elastic airflow port 9 and enter the elastic air chamber 2; wherein, the greater the airflow pressure, the greater the degree of opening of the lip structure 7, and the larger the opening of the elastic airflow port 9, ensuring the stable flow of forward airflow; in addition, when the airflow stops flowing into the nozzle body 5, the elastic airflow port 9 returns to a sealed state; Reverse cut-off: When the airflow in the elastic air cavity 2 attempts to flow in the reverse direction from the elastic airflow port 9, the lip structure 7 will fit more tightly due to the reverse pressure. The greater the pressure, the better the sealing effect of the elastic airflow port 9, completely blocking the reverse airflow from entering the elastic airflow port 9, avoiding interference with the upstream airflow, and playing a role in stabilizing the airflow. As can be seen from the above, the nozzle body 5 can eliminate the interference of reverse airflow through the unidirectional control characteristics of the lip structure 7, which has forward conduction and reverse cut-off, and effectively eliminate vortex disturbance, so as to achieve the airflow setting function with pressure loss of less than 5%; at the same time, by utilizing the adaptive adjustment of the elastic tube body 6, stable control of the forward airflow can be achieved; and the volume of the elastic gas can be reduced to achieve instrument miniaturization.

[0025] Compared to the shortcomings of existing technologies, in this invention, the greater the airflow pressure in the elastic tube 6, the greater the opening degree of the lip structure 7, resulting in stronger flow capacity. This allows for adaptive adjustment of flowability based on airflow pressure, helping to reduce forward pressure loss. Secondly, when reverse airflow attempts to flow into the elastic tube 6 through the elastic airflow port 9, the reverse pressure causes the lip structure 7 to fit tightly, and the greater the pressure, the better the sealing effect of the elastic airflow port 9. Furthermore, when the airflow pressure in the elastic tube 6 increases, the inner wall of the elastic tube 6 deforms outward to absorb excess gas and pressure, preventing a sudden increase in downstream flow. When the airflow pressure in the elastic tube 6 decreases... The inner wall of the elastic tube 6 contracts under its own rebound force to release the stored gas, thereby replenishing the downstream flow and maintaining the stability of the flow. This process effectively mitigates the influence of eddy current vibration to avoid flow fluctuations. In addition, the nozzle body 5 with the lip structure 7 greatly suppresses reverse interference and pressure oscillation, so that the airflow transmitted to the elastic gas container 2 has been pre-stabilized, greatly reducing the buffer load required by the elastic gas container. The same level of flow stabilization effect can be achieved with a smaller volume, realizing the miniaturization design of the instrument. This makes the gas container structure have the advantages of eliminating reverse airflow interference, good flow stabilization effect and compact structure.

[0026] like Figure 3 and Figure 4 As shown, in some embodiments, the lip structure 7 includes a plurality of lip units 10 arranged sequentially. Each lip unit 10 includes an airflow port seat 11, and both sides of the airflow port seat 11 are provided with inclined contraction surfaces 12. The inclined contraction surfaces 12 of the lip unit 10 are connected to the inclined contraction surfaces 12 of its adjacent lip unit 10. The contraction guide portion 8 and the elastic airflow port 9 are respectively located at both ends of the plurality of airflow port seats 11. The elastic airflow port 9 is in the shape of a straight line or a cross. Specifically, when the reverse airflow attempts to flow into the elastic tube 6 through the elastic airflow port 9, the reverse airflow blows onto the plurality of inclined contraction surfaces 12, causing the plurality of airflow port seats 11 to move towards the center and press more tightly against each other, greatly increasing the pressure on the contact surface. The greater the reverse pressure of the reverse airflow, the tighter the contact between the plurality of airflow port seats 11, allowing the elastic airflow port 9 to close more tightly.

[0027] like Figure 5 As shown, in some embodiments, the contraction guide portion 8 includes a plurality of conical guide surfaces 13 arranged sequentially, and the elastic airflow port 9 is located between the plurality of conical guide surfaces 13. Specifically, when the gas in the elastic tube body 6 passes through the plurality of conical guide surfaces 13, it can be concentrated at the elastic airflow port 9 by the guiding effect of the plurality of conical guide surfaces 13, thereby opening the lip structure 7 and opening the elastic airflow port 9.

[0028] like Figure 6 As shown, in some embodiments, the contraction guide portion 8 includes two opposing inclined guide surfaces 14, with the elastic airflow port 9 located between the two inclined guide surfaces 14; or, the contraction guide portion 8 includes a plurality of sequentially arranged inclined guide surfaces 14, with the elastic airflow port 9 located between the plurality of inclined guide surfaces 14. Specifically, when the gas in the elastic tube body 6 passes through the inclined guide surfaces 14, it can be concentrated at the elastic airflow port 9, thereby opening the lip structure 7 and opening the elastic airflow port 9.

[0029] like Figure 3 As shown, in some embodiments, the nozzle body 5 is an integrally formed structure, the upper end of the elastic tube 6 is provided with a flange 15, and the lower end of the flange 15 abuts against the upper end of the air inlet 3.

[0030] like Figure 7 As shown, in some embodiments, the elastic gas container housing 1 includes an elastic gas container upper cover 16, an elastic gas container lower cover 17, and a thin film elastic pad 18. The elastic gas container upper cover 16 is connected to the elastic gas container lower cover 17. The elastic gas container cavity 2 is located between the elastic gas container upper cover 16 and the elastic gas container lower cover 17. The thin film elastic pad 18 is located in the elastic gas container cavity 2 and is located inside the elastic gas container upper cover 16. A flow divider 19 and two oppositely arranged guide inclined plates 20 are provided in the elastic gas container cavity 2. The elastic air outlet 9 is located between the two guide inclined plates 20 and is directly opposite the flow divider 19. Flow divider channels 21 are provided on both sides of the flow divider 19 and between the two guide inclined plates 20. Both flow divider channels 21 are connected to the air outlet 4. Specifically, as the airflow enters the elastic gas cavity 2 through the elastic airflow port 9, it is guided by two guide inclined plates 20 and diverted by two diversion channels 21. This diversion reduces the kinetic energy concentration of the airflow at the air inlet 3, thereby stabilizing the airflow. Furthermore, after the gas is dispersed in the elastic gas cavity 2, it interacts with the elastic gas shell 1 and the thin film elastic pad 18. The elastic deformation of the thin film elastic pad 18 can absorb pressure fluctuations. When the airflow pressure increases, the elastic gas cavity 2 can expand outward to store excess gas. When the pressure decreases, the elastic gas cavity 2 can contract to release gas, automatically compensating for changes in flow rate. Finally, the buffered gas flows out uniformly from the air outlet 4 and enters the flow pump 23.

[0031] like Figure 1 , Figure 2 and Figure 7As shown, in some embodiments, the gas container structure further includes a flow meter 22 and a flow pump 23. The flow meter 22 is connected to the air inlet 3, and the air outlet 4 is connected to the flow pump 23. Specifically, the flow meter 22 is directly connected to the air inlet 3 to monitor the gas flow rate entering the gas container structure in real time; the flow pump 23 is connected to the air outlet 4 to draw gas through the gas container structure.

[0032] Furthermore, the present invention also provides a flue gas analyzer, which includes the aforementioned gas container structure. Specifically, the specific structure of the gas container structure refers to the above embodiments. Since the gas container structure adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0033] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A gas-capacity structure, characterized in that: It includes an elastic gas container housing (1), an elastic gas container cavity (2) is provided in the elastic gas container housing (1), an air inlet (3) and an air outlet (4) communicating with the elastic gas container cavity (2) are provided on the elastic gas container housing (1), a nozzle body (5) is provided in the air inlet (3), the nozzle body (5) includes an elastic tube body (6), a lip structure (7) is provided at the end of the elastic tube body (6), the lip structure (7) has a contraction guide part (8) and an elastic airflow port (9), the contraction guide part (8) is located in the elastic tube body (6), the elastic airflow port (9) is connected to the end of the contraction guide part (8) and is connected to the elastic gas container cavity (2), the elastic airflow port (9) opens and spreads outward when the airflow acts on the lip structure (7) in the positive direction, and the elastic airflow port (9) contracts inward when the airflow acts on the lip structure (7) in the reverse direction.

2. The gas-capacity structure according to claim 1, characterized in that: The lip structure (7) includes a plurality of lip units (10) arranged in sequence. Each lip unit (10) includes an airflow port seat (11). Both sides of the airflow port seat (11) are provided with inclined contraction surfaces (12). The inclined contraction surfaces (12) of the lip unit (10) are connected to the inclined contraction surfaces (12) of the adjacent lip unit (10). The contraction guide (8) and the elastic airflow port (9) are located at both ends of the plurality of airflow port seats (11).

3. The gas-capacity structure according to claim 2, characterized in that: The elastic airflow port (9) is in the shape of a straight line or a cross.

4. The gas-capacity structure according to claim 1, characterized in that: The contraction guide (8) includes a plurality of conical guide surfaces (13) arranged in sequence, and the elastic airflow port (9) is located between the plurality of conical guide surfaces (13).

5. A gas-capacity structure according to claim 1, characterized in that: The contraction guide (8) includes two inclined guide surfaces (14) arranged opposite to each other, and the elastic airflow port (9) is located between the two inclined guide surfaces (14); or, the contraction guide (8) includes a plurality of inclined guide surfaces (14) arranged in sequence, and the elastic airflow port (9) is located between the plurality of inclined guide surfaces (14).

6. A gas-capacity structure according to claim 1, characterized in that: The nozzle body (5) is an integrally formed structure, and the upper end of the elastic tube (6) is provided with a flange (15), and the lower end of the flange (15) abuts against the upper end of the air inlet (3).

7. A gas-capacity structure according to claim 1, characterized in that: The elastic gas container housing (1) includes an elastic gas container upper cover (16), an elastic gas container lower cover (17), and a thin film spring pad (18). The elastic gas container upper cover (16) is connected to the elastic gas container lower cover (17). The elastic gas container cavity (2) is located between the elastic gas container upper cover (16) and the elastic gas container lower cover (17). The thin film spring pad (18) is located in the elastic gas container cavity (2) and is located inside the elastic gas container upper cover (16).

8. A gas-capacity structure according to claim 7, characterized in that: The elastic gas cavity (2) is provided with a flow divider (19) and two oppositely arranged guide inclined plates (20). The elastic air outlet (9) is located between the two guide inclined plates (20) and is directly opposite the flow divider (19). Flow divider channels (21) are provided between both sides of the flow divider (19) and the two guide inclined plates (20). Both flow divider channels (21) are connected to the air outlet (4).

9. A gas-capacity structure according to claim 1, characterized in that: The gas capacity structure also includes a flow meter (22) and a flow pump (23), the flow meter (22) being connected to the air inlet (3) and the air outlet (4) being connected to the flow pump (23).

10. A flue gas analyzer, characterized in that: It includes the gas-capacity structure as described in any one of claims 1-9.

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