An SCR wind leakage detection device

Abstract

The utility model belongs to the air leakage detection technical field, concretely speaking is a kind of SCR air leakage detection device, including air leakage detector;The top of air leakage detector is equipped with display screen, one side is fixedly installed with connector, the side that connector is away from air leakage detector is provided with gas delivery mechanism, the side that gas delivery mechanism is away from connector is provided with filter mechanism;The side close to gas delivery small pipe is provided with jacking mechanism and leakage prevention component;The cooperation of screw hole, screw cylinder, gas delivery pipe, fixed cylinder, gas delivery small pipe and filter screen can make gas delivery pipe be easily disassembled by the setting of screw hole, screw cylinder and gas delivery pipe, so as to save space more when storing, and also can be directly disassembled and maintained when maintaining, more portable and efficient, the cooperation of fixed cylinder, gas delivery small pipe and filter screen can filter the air passing through, to prevent impurities from entering the inside of machine and causing damage.

Description

Technical Field

[0001] This utility model belongs to the field of air leakage detection technology, specifically an SCR air leakage detection device. Background Technology

[0002] Selective catalytic reduction (SCR) technology is a core process for achieving nitrogen oxide (NOx) emission standards in industries such as thermal power, cement, and steel. Its denitrification efficiency is directly related to the system's airtightness. When there is air leakage in the SCR flue or reactor, the infiltration of cold outside air will lower the flue gas temperature (deviating from the catalyst activity window of 280-420℃), leading to a 5%-20% decrease in denitrification efficiency. Simultaneously, air leakage will dilute the ammonia concentration in the flue gas, causing an increase in ammonia slip (exceeding 2.28 mg / m³). 3 This not only causes catalyst poisoning and failure (reducing lifespan by 15%-30%), but also leads to ammonium sulfate clogging of heat exchange equipment and increased fan power consumption (for every 1% increase in leakage rate, fan energy consumption increases by 2%-3%). Therefore, SCR systems need to be equipped with dedicated leakage detection devices to accurately locate leakage points and quantify leakage rates.

[0003] The SCR testing environment is characterized by high temperatures (equipment surface temperature 40-60℃) and fluctuating humidity (10%-30%). Existing devices mostly use ordinary rubber sealing rings (temperature resistance ≤120℃) for their sealing components, which are prone to aging and cracking after long-term use, with a seal failure probability exceeding 40% (after 1 year of use). At the same time, the gas transmission pipelines are mostly made of plastic or ordinary steel. Plastic pipelines are prone to softening and deformation at high temperatures (temperature resistance ≤80℃), while ordinary steel has poor thermal conductivity (thermal conductivity ≤50W / (m·K)), resulting in gas temperature fluctuations (±5℃) in the pipeline, affecting the accuracy of flow measurement (for every 1℃ temperature fluctuation, the flow error increases by 1.5%). In addition, existing devices lack an effective clamping mechanism. When there is an assembly deviation (≤2mm) between the gas transmission pipeline and the SCR sampling port, the gap cannot be compensated by adaptive clamping, further aggravating seal leakage.

[0004] Therefore, this utility model provides an SCR leakage detection device. Utility Model Content

[0005] To overcome the shortcomings of existing technologies and solve at least one of the problems mentioned in the background art, an SCR leakage detection device is proposed.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: An SCR leakage detection device of this utility model includes a leakage detector; the top of the leakage detector is equipped with a display screen; a connector is fixedly installed on one side of the leakage detector; a gas supply mechanism is provided on the side of the connector away from the leakage detector; a filter mechanism is provided on the side of the gas supply mechanism away from the connector; a tightening mechanism and a leak-proof component are provided on the side of the fixed cylinder near the gas supply tube; a sealing component is provided on the side of the tightening mechanism away from the fixed cylinder; the gas supply mechanism includes a screw hole, a screw cylinder, and a gas supply pipe; the screw hole is opened on the side of the connector away from the leakage detector; the screw cylinder is threaded onto the inner wall of the connector through the screw hole; the side of the screw cylinder away from the connector is fixedly installed with the gas supply pipe; the combined use of the screw hole, screw cylinder, and gas supply pipe allows the gas supply pipe to be easily disassembled, thus saving space during storage and allowing for direct disassembly and maintenance, making it more portable and efficient.

[0007] Preferably, the filtration mechanism includes a fixed cylinder, an air supply tube, and a filter screen. The fixed cylinder is connected to the side of the air supply tube away from the screw cylinder, and the side of the fixed cylinder away from the air supply tube is connected to the air supply tube. The inner wall of the air supply tube is fixedly installed with the filter screen. In this scheme, the combined use of the fixed cylinder, the air supply tube, and the filter screen can filter the passing air, thereby preventing impurities from entering the mechanical interior and causing damage, ensuring the safe use of the air leakage detector, and improving the detection safety.

[0008] Preferably, the clamping mechanism includes a spring, a retaining ring, and heat dissipation fins. The spring is fixedly installed on the side of the fixed cylinder away from the air supply pipe, and the side of the spring away from the fixed cylinder is fixedly installed with the retaining ring. The surface of the retaining ring is fixedly installed with the heat dissipation fins. In this scheme, the cooperation of the spring and the retaining ring can push the first sealing ring so that it can adaptively fit with the object, thereby preventing air leakage and inaccurate detection. The heat dissipation fins can dissipate heat from the retaining ring and the sliding ring, preventing high temperature from causing component damage and aging.

[0009] Preferably, the leak-proof component includes a fixed rod and a sliding ring. Several sets of fixed rods are provided, and the sets of fixed rods are fixedly installed in a ring shape on the side near the gas delivery tube and located on the inner wall of the spring. The sliding ring is fixedly installed on the inner wall of the fixed ring, and the side of the sliding ring near the fixed rod is movably inserted into the fixed rod. In this scheme, the cooperation between the fixed rod and the sliding ring can achieve a high degree of sealing between the fixed ring and the gas delivery tube, thereby preventing air leakage and ensuring the accuracy of the test data.

[0010] Preferably, the sealing assembly includes a first sealing ring and a second sealing ring. The first sealing ring is fixedly installed on the side of the fixed ring away from the spring, and the second sealing ring is fixedly installed on the inner wall of the sliding ring near the air supply tube. In this design, the first sealing ring enables the fixed ring to fit tightly against the object to prevent air leakage from causing a decrease in detection accuracy, and the second sealing ring ensures that there is no leakage at the connection point when the sliding ring slides on the surface of the air supply tube.

[0011] Preferably, the first sealing ring and the second seal are made of silicone rubber. In this design, the molecular chain of silicone rubber contains silicon-oxygen bonds (bond energy 452kJ / mol), and its resistance to thermo-oxidative aging is better than that of ordinary rubber—it can be used continuously at 150℃ for 2 years without obvious cracking on the surface.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. The SCR leakage detection device of this utility model, through the arrangement of screw holes, screw cylinders, air supply pipes, fixed cylinders, small air supply tubes, and filters, allows for easy disassembly of the air supply pipes, thus saving space during storage and enabling direct disassembly and maintenance, making it more portable and efficient. The combination of fixed cylinders, small air supply tubes, and filters filters the passing air, preventing impurities from entering the mechanical interior and causing damage, ensuring the safe use of the leakage detector and improving detection safety.

[0014] 2. The SCR air leakage detection device of this utility model, through the arrangement of spring, fixed ring, heat dissipation fins, fixed rod and sliding ring, enables the spring and fixed ring to push the first sealing ring to adaptively fit with the object, thereby preventing air leakage and inaccurate detection. The heat dissipation fins can dissipate heat from the fixed ring and sliding ring to prevent high temperature from damaging and aging the components. The cooperation between the fixed rod and the sliding ring can achieve a high degree of seal between the fixed ring and the air delivery tube, thereby preventing air leakage and ensuring the accuracy of the detection data. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a front perspective view of the present invention;

[0017] Figure 2 This is a localized explosion in this utility model. Figure 1 ;

[0018] Figure 3 This is a partial structural diagram of the present invention;

[0019] Figure 4This is a schematic diagram of the partial explosion structure in this utility model. Figure 2 ;

[0020] Figure 5 yes Figure 2 Enlarged view of a portion of point A in the middle.

[0021] Legend:

[0022] 1. Air leakage detector; 2. Display screen; 3. Connector; 4. Air supply mechanism; 41. Screw hole; 42. Screw barrel; 43. Air supply pipe; 5. Filtering mechanism; 51. Fixing cylinder; 52. Air supply tube; 53. Filter screen; 6. Tightening mechanism; 61. Spring; 62. Fixing ring; 63. Heat dissipation fins; 7. Leak prevention component; 71. Fixing rod; 72. Sliding ring; 8. Sealing component; 81. First sealing ring; 82. Second sealing ring. Detailed Implementation

[0023] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] Specific implementation examples are given below.

[0025] like Figures 1 to 5As shown in the figure, an SCR leakage detection device according to an embodiment of the present invention includes a leakage detector 1; a display screen 2 is provided on the top of the leakage detector 1, a connector 3 is fixedly installed on one side of the leakage detector 1, an air supply mechanism 4 is provided on the side of the connector 3 away from the leakage detector 1, and a filter mechanism 5 is provided on the side of the air supply mechanism 4 away from the connector 3; a tightening mechanism 6 and a leak-proof component 7 are provided on the side of the fixed cylinder 51 near the air supply tube 52; a sealing assembly is provided on the side of the tightening mechanism 6 away from the fixed cylinder 51. Component 8; The gas delivery mechanism 4 includes a screw hole 41, a screw barrel 42, and a gas delivery pipe 43. The screw hole 41 is located on the side of the connector 3 away from the air leakage detector 1. The screw barrel 42 is threaded onto the inner wall of the connector 3 through the screw hole 41. The side of the screw barrel 42 away from the connector 3 is fixedly installed with the gas delivery pipe 43. The filter mechanism 5 includes a fixed cylinder 51, a gas delivery tube 52, and a filter screen 53. The fixed cylinder 51 is connected to the side of the gas delivery pipe 43 away from the screw barrel 42. The side of the fixed cylinder 51 away from the gas delivery pipe 43 is connected to the side of the gas delivery tube 52. The inner wall of the gas delivery pipe 52 is fixedly installed with the filter screen 53. The clamping mechanism 6 includes a spring 61, a fixing ring 62, and heat dissipation fins 63. The spring 61 is fixedly installed on the side of the fixed cylinder 51 away from the gas delivery pipe 43. The side of the spring 61 away from the fixed cylinder 51 is fixedly installed with the fixing ring 62. The surface of the fixing ring 62 is fixedly installed with the heat dissipation fins 63. The leak-proof component 7 includes a fixing rod 71 and a sliding ring 72. Several sets of fixing rods 71 ​​are provided, and the several sets of fixing rods 71 ​​are fixedly installed in a ring on the fixed cylinder 51. The sliding ring 72 is fixedly installed on the inner wall of the fixed ring 62, near the gas supply tube 52 and located on the inner wall of the spring 61. The side of the sliding ring 72 near the fixed rod 71 is movably inserted into the fixed rod 71. The sealing assembly 8 includes a first sealing ring 81 and a second sealing ring 82. The first sealing ring 81 is fixedly installed on the side of the fixed ring 62 away from the spring 61, and the second sealing ring 82 is fixedly installed on the inner wall of the sliding ring 72 near the gas supply tube 52. The material of the first sealing ring 81 and the second sealing ring 82 is silicone rubber.

[0026] like Figures 1 to 5As shown, the combined use of screw hole 41, screw barrel 42, and air supply pipe 43 allows for easy disassembly of the air supply pipe 43, saving space during storage and enabling direct disassembly and maintenance, making it more portable and efficient. The combined use of fixed cylinder 51, air supply tube 52, and filter screen 53 filters the passing air, preventing impurities from entering the mechanical interior and causing damage, ensuring the safe use of the air leakage detector 1 and improving detection safety. The combined use of spring 61 and fixed ring 62 pushes the first sealing ring 81 to adaptively conform to the object, preventing air leakage and inaccurate detection. The heat dissipation fins 6... 3. It can dissipate heat from the fixed ring 62 and the sliding ring 72, preventing high temperature from causing damage and aging of the components. The cooperation between the fixed rod 71 and the sliding ring 72 can make the fixed ring 62 and the gas delivery tube 52 highly sealed, thereby preventing air leakage and ensuring the accuracy of the detection data. The first sealing ring 81 can make the fixed ring 62 fit tightly against the object to prevent air leakage from causing a decrease in detection accuracy. The second sealing ring 82 can prevent leakage at the connection when the sliding ring 72 slides on the surface of the gas delivery tube 52. The silicone rubber material has a molecular chain with a silicon-oxygen bond energy of 452kJ / mol, and its resistance to thermo-oxidative aging is better than that of ordinary rubber - after two years of continuous use at 150℃, there is no obvious cracking on the surface.

[0027] Working principle: During operation, the user first picks up the air leakage detector 1, then picks up the air supply pipe 43 and aligns the screw cylinder 42 with the screw hole 41. Next, the screw cylinder 42 is installed onto the inner wall of the connector 3, and then it can be used. During use, the user needs to align the fixing ring 62 with the area to be detected, then press the fixing ring 62 tightly against the detection area and apply a certain pressure, so that the spring 61 is compressed. When the spring 61 is compressed, the fixing ring 62 will slide, causing the sliding ring 72 to move synchronously. When the sliding ring 72 moves, the fixing rod 71 will slide within the sliding ring 72. When the spring 61 is compressed to a certain extent, it will push the fixing ring 62 and the first sealing ring 8 through its elastic force. 1. This ensures close contact between the detector and the object being tested, preventing leaks during testing. If a leak occurs, the leaking gas will enter the connector 3 through the sliding ring 72 and the gas supply tube 52, and will then be detected by the leak detector 1. When the gas passes through the filter screen 53, the filter screen 53 will remove impurities from the gas to prevent them from damaging the leak detector 1. After use, the user can remove the gas supply tube 43 for maintenance and storage. In special applications such as flues, high temperatures will be generated during testing. At that time, the heat dissipation fins 63 can dissipate the heat absorbed by the fixed ring 62 and the sliding ring 72 to prevent the leak detector 1 from having a shortened service life due to high temperatures.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An SCR air leakage detection device, comprising an air leakage detector (1); characterized in that: The air leakage detector (1) is provided with a display screen (2) on the top. A connector (3) is fixedly installed on one side of the air leakage detector (1). An air supply mechanism (4) is provided on the side of the connector (3) away from the air leakage detector (1). A filter mechanism (5) is provided on the side of the air supply mechanism (4) away from the connector (3). The gas delivery mechanism (4) includes a screw hole (41), a screw barrel (42), and a gas delivery pipe (43). The screw hole (41) is opened on the side of the connector (3) away from the air leakage detector (1). The screw barrel (42) is installed on the inner wall of the connector (3) through the screw hole (41). The side of the screw barrel (42) away from the connector (3) is fixedly installed with the gas delivery pipe (43). The filtration mechanism (5) includes a fixed cylinder (51), an air supply tube (52), and a filter screen (53). The fixed cylinder (51) is connected to the side of the air supply tube (43) away from the screw cylinder (42). The side of the fixed cylinder (51) away from the air supply tube (43) is connected to the air supply tube (52). The inner wall of the air supply tube (52) is fixedly installed with the filter screen (53).

2. The SCR leakage detection device according to claim 1, characterized in that: The fixed cylinder (51) is provided with a tightening mechanism (6) and a leak-proof component (7) on the side near the gas delivery pipe (52).

3. The SCR leakage detection device according to claim 2, characterized in that: The clamping mechanism (6) is provided with a sealing component (8) on the side away from the fixed cylinder (51).

4. The SCR leakage detection device according to claim 2, characterized in that: The clamping mechanism (6) includes a spring (61), a fixing ring (62) and a heat dissipation fin (63). The spring (61) is fixedly installed on the side of the fixing cylinder (51) away from the gas pipe (43). The side of the spring (61) away from the fixing cylinder (51) is fixedly installed with the fixing ring (62). The surface of the fixing ring (62) is fixedly installed with the heat dissipation fin (63).

5. The SCR leakage detection device according to claim 2, characterized in that: The leak-proof component (7) includes a fixed rod (71) and a sliding ring (72). The fixed rod (71) is provided in several groups. The fixed rod (71) is fixedly installed in a ring on the side of the fixed cylinder (51) near the gas supply pipe (52) and located on the inner wall of the spring (61). The sliding ring (72) is fixedly installed on the inner wall of the fixed ring (62). The side of the sliding ring (72) near the fixed rod (71) is movably inserted into the fixed rod (71).

6. The SCR leakage detection device according to claim 3, characterized in that: The sealing assembly (8) includes a first sealing ring (81) and a second sealing ring (82). The first sealing ring (81) is fixedly installed on the side of the fixed ring (62) away from the spring (61), and the second sealing ring (82) is fixedly installed on the side of the inner wall of the sliding ring (72) close to the gas delivery tube (52).

7. The SCR leakage detection device according to claim 6, characterized in that: The first sealing ring (81) and the second sealing ring (82) are made of silicone rubber.

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