High temperature ultraviolet ammonia monitoring device

Abstract

The application discloses a high-temperature ultraviolet ammonia monitoring device and relates to the field of ammonia monitoring devices.The device comprises a case, an air inlet pipe is installed on the case, a detection box is installed in the case, an air outlet pipe is also installed on the case, an air inlet branch pipe is installed on the right side of the detection box, an air outlet branch pipe is installed on the left side of the detection box, and the air outlet branch pipe is connected with the air outlet pipe; a sampling mechanism is arranged in the detection box and is used for separately sampling and sealing the detected gas; a channel switching mechanism is used for controlling the flow direction of the gas.The high-temperature ultraviolet ammonia monitoring device adopts the sampling mechanism, can realize the separate sampling and sealing of the dynamic measured gas, and can make the measured gas sample in a sealed space, thereby avoiding the influence of air flow turbulence on the accuracy of the detection data, avoiding the detection error caused by the dilution of the ammonia concentration due to the gas flow, and ensuring the accuracy of the detection data.

Description

Technical Field

[0001] This invention relates to the field of ammonia monitoring device technology, specifically a high-temperature ultraviolet ammonia monitoring device. Background Technology

[0002] Ammonia is a key gas in industrial denitrification, urea synthesis and other processes. Its processing is generally carried out in a high-temperature environment. In order to avoid ammonia leakage and environmental pollution, it is necessary to monitor the ammonia concentration in the environment through ammonia monitoring devices.

[0003] Existing ultraviolet ammonia monitoring devices mainly utilize the characteristic absorption peaks of ammonia molecules in a specific ultraviolet band (such as 190-230nm) to absorb ultraviolet light. The concentration can be calculated by analyzing the intensity changes of the absorption spectrum. However, in actual use, external gases are introduced into the detection device through devices such as gas pumps. The gas is in a flowing state inside the device, which cannot achieve isolation of the detection gas. Furthermore, the gas flow may cause turbulence, refraction, or jitter in the ultraviolet beam, thus affecting the accuracy of the detection data. Summary of the Invention

[0004] The purpose of this invention is to provide a high-temperature ultraviolet ammonia monitoring device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-temperature ultraviolet ammonia gas monitoring device, comprising a chassis, an inlet pipe installed on the chassis, a detection box installed inside the chassis, an outlet pipe also installed on the chassis, an inlet branch pipe installed on the right side of the detection box, an outlet branch pipe installed on the left side of the detection box, and the outlet branch pipe and the outlet pipe being connected to each other.

[0006] A sampling mechanism is used to individually sample and seal the gas being tested; the sampling mechanism is installed inside the testing chamber.

[0007] The channel switching mechanism is used to control the flow direction of the gas, so that the gas flow position always matches the sampling mechanism to be sampled for sampling. The channel switching mechanism is installed inside the detection box.

[0008] Preferably, the air inlet pipe is connected to an air pump fixed inside the chassis, the air pump is connected to a dust collector via a conduit, the dust collector is connected to a tubular water cooler via a conduit, and the tubular water cooler is connected to the air inlet branch pipe via a conduit. Through the above structure, the dust removal and cooling of the gas can be achieved, thereby ensuring the purity of the gas for subsequent testing.

[0009] Preferably, a chromatograph is fixedly installed on the detection box, and an ultraviolet emitter fixed on the detection box is arranged directly opposite the chromatograph. A servo motor is fixed on the outside of the detection box, and the servo motor is connected to a threaded rod with a bearing inside the detection box. With the above structure, ammonia in the gas can be detected to determine the ammonia content in the gas.

[0010] Preferably, the sampling mechanism includes two sampling boxes slidably connected inside the detection chamber, and the two sampling boxes are fixed to each other by a fixing rod. Two sealing valve plates are connected to the bearings inside the sampling boxes. The sealing valve plates cooperate with the internal circular holes of the sampling boxes to achieve a sealing effect. The sealing valve plates rotate 90° each time. Through the above structure, gas can be sampled and sealed separately, so that the gas remains static during the detection process, thereby avoiding gas flow from affecting the accuracy of the detection data.

[0011] Preferably, a transparent glass is fixed on the sealing valve plate, and a gear is also fixed on the rotating shaft of the sealing valve plate. The gear is set inside the sampling box. Through the action of the transparent glass, ultraviolet light can easily penetrate the gas sample to be tested, thereby ensuring the normal progress of the test.

[0012] Preferably, a connecting plate is slidably connected to the fixed rod, and a first spring is fixed between the connecting plate and the two sampling boxes. The connecting plate is fixedly connected to the movable frame, while the movable frame is slidably connected to the sampling boxes. Through the above structure, the connecting plate and the fixed rod can move relative to each other, thereby providing a basic guarantee for the normal operation of the device.

[0013] Preferably, a convex rack is fixed on the movable frame, and the convex rack and gear are meshed together. A T-shaped plate is also fixed on the movable frame, and the T-shaped plate and threaded rod are threaded together. The movement of the movable frame drives the convex rack to move. Combined with the meshing transmission between the convex rack and gear, it can provide a basic force for the rotation of the sealing valve plate, thereby ensuring the normal operation of the device.

[0014] Preferably, the channel switching mechanism includes a guide rod that is slidably connected to the detection box, and a second spring is fixed between the guide rod and the detection box. The guide rod is flush with the horizontal plate of the T-shaped plate. When the T-shaped plate moves to contact the guide rod, the movement of the T-shaped plate can provide a basic force for the movement of the guide rod. Combined with the elasticity of the second spring, it can provide a basic force for the automatic reset of the guide rod.

[0015] Preferably, a movable plate is also fixed on the guide rod, and an inclined groove is provided on the movable plate. The inclined groove is slidably connected to the crossbar. At the same time, sliding rods are symmetrically fixed on the crossbar. The sliding rods are slidably connected to the detection box. The movement of the guide rod can drive the movable plate and the inclined groove to move. In conjunction with the sliding action between the inclined groove and the crossbar, a basic force can be provided for the movement of the sliding rods.

[0016] Preferably, a limiting block is fixed on the slide rod, and the limiting block contacts the detection box to achieve positioning. A sealing plate is also fixed on the slide rod, and the sealing plate cooperates with the side opening of the detection box to achieve a sealing effect. The position of the sealing plate can be adjusted by moving the slide rod, thereby providing a basic guarantee for the closing and opening of the side opening of the detection box. In addition, the gas flow direction can be automatically switched to ensure the normal sampling of gas samples.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. This high-temperature ultraviolet ammonia monitoring device adopts a sampling mechanism that can realize the individual sampling and sealing of the gas being measured dynamically. This ensures that the gas sample is in a sealed space, which can avoid the impact of airflow turbulence on the accuracy of the detection data and avoid detection errors caused by the dilution of ammonia concentration due to gas flow, thus ensuring the accuracy of the detection data.

[0019] 2. This high-temperature ultraviolet ammonia gas monitoring device adopts a channel switching mechanism, which can automatically switch the gas flow direction during sampling, so that the gas and the sampling box to be sampled correspond to each other. Through automatic gas reversal, the normal sampling process is ensured. In addition, the airflow can be used to flush the gas detected in the sampling box from the previous test, thereby effectively removing the gas detected in the previous test and avoiding interference caused by the mixing of the two gases, thus further ensuring the accuracy of the detection data. Attached Figure Description

[0020] Figure 1 This is a frontal three-dimensional structural diagram of the overall composition of the device of the present invention;

[0021] Figure 2 This is a side view cross-sectional three-dimensional structural diagram of the chassis of the present invention;

[0022] Figure 3 This is a frontal three-dimensional structural diagram of the detection box of the present invention;

[0023] Figure 4 This is a frontal cross-sectional three-dimensional structural diagram of the detection box of the present invention;

[0024] Figure 5 This is a top view cross-sectional three-dimensional structural diagram of the detection box of the present invention;

[0025] Figure 6 This is a side view cross-sectional three-dimensional structural diagram of the detection box of the present invention;

[0026] Figure 7 This is a side view cross-sectional three-dimensional structural schematic diagram of the sampling mechanism of the present invention;

[0027] Figure 8 This is a schematic diagram of the three-dimensional structure of the gear and the convex rack of the present invention;

[0028] Figure 9 This is a three-dimensional structural diagram of the channel switching mechanism of the present invention;

[0029] Figure 10 This is a schematic diagram of the first spring in the unforced state of the present invention.

[0030] In the diagram: 1. Chassis; 2. Inlet pipe; 3. Air pump; 4. Dust collector; 5. Tubular water cooler; 6. Inlet manifold; 7. Detection box; 701. Chromatograph; 702. Ultraviolet emitter; 703. Servo motor; 704. Threaded rod; 8. Outlet manifold; 9. Outlet pipe; 10. Sampling mechanism; 1001. Sampling box; 1002. Sealing valve plate; 1003. Transparent glass; 1004. 1005. Gear; 1006. Fixed rod; 1007. Connecting plate; 1008. First spring; 1009. Movable frame; 10000. Raised rack; 1010. T-shaped plate; 11. Channel switching mechanism; 1101. Guide rod; 1102. Second spring; 1103. Movable plate; 1104. Inclined groove; 1105. Crossbar; 1106. Slide bar; 1107. Limiting block; 1108. Sealing plate. Detailed Implementation

[0031] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figures 1-10 The present invention provides a technical solution: a high temperature ultraviolet ammonia gas monitoring device, including a chassis 1, an air inlet pipe 2 installed on the chassis 1, a detection box 7 installed inside the chassis 1, an air outlet pipe 9 also installed on the chassis 1, an air inlet branch pipe 6 installed on the right side of the detection box 7, an air outlet branch pipe 8 installed on the left side of the detection box 7, and the air outlet branch pipe 8 and the air outlet pipe 9 are connected to each other.

[0033] The sampling mechanism 10 is used to individually sample and seal the gas being tested. The sampling mechanism 10 is installed inside the testing chamber 7.

[0034] The channel switching mechanism 11 is used to control the flow direction of the gas so that the gas flow position always cooperates with the sampling mechanism 10 to perform the sampling function. The channel switching mechanism 11 is installed in the detection box 7.

[0035] The air inlet pipe 2 is connected to the air pump 3 fixed inside the casing 1. The air pump 3 is connected to the dust collector 4 through a conduit. The dust collector 4 is connected to the tubular water cooler 5 through a conduit. The tubular water cooler 5 is connected to the air inlet manifold 6 through a conduit. A chromatograph 701 is fixedly installed on the detection box 7. An ultraviolet light emitter 702 is fixed on the detection box 7 directly opposite the chromatograph 701. A servo motor 703 is fixed on the outside of the detection box 7. The servo motor 703 is connected to a threaded rod 704 with a bearing connected inside the detection box 7. The sampling mechanism 10 includes two sampling boxes 1001 that are slidably connected inside the detection box 7. The two sampling boxes 1001 are fixed to each other by a fixing rod 1005. Two sealing valve plates 1002 are connected to the sampling boxes 1001 with bearings. The sealing valve plates 1002 are connected to the inner circle of the sampling box 1001. The hole fit achieves a sealing effect, and the sealing valve plate 1002 rotates 90° each time. A transparent glass 1003 is fixed on the sealing valve plate 1002, and a gear 1004 is also fixed on the rotation shaft of the sealing valve plate 1002, and the gear 1004 is set inside the sampling box 1001. A connecting plate 1006 is slidably connected to the fixed rod 1005, and a first spring 1007 is fixed between the connecting plate 1006 and the two sampling boxes 1001. The connecting plate 1006 is fixedly connected to the movable frame 1008, while the movable frame 1008 is slidably connected to the sampling box 1001. A convex rack 1009 is fixed on the movable frame 1008, and the convex rack 1009 is meshed with the gear 1004. A T-shaped plate 1010 is also fixed on the movable frame 1008, and the T-shaped plate 1010 is threadedly connected to the threaded rod 704.

[0036] When using this high-temperature ultraviolet ammonia monitoring device, such as Figure 1 and Figure 2 As shown, by starting the air pump 3, in conjunction with the air inlet pipe 2, high-temperature outside air can be drawn into the dust collector 4. The dust collector 4 removes dust from the air, effectively removing impurities. The air that has passed through the dust collector enters the tubular water cooler 5, where it is cooled. The cooled air then enters the detection chamber 7 through the air inlet manifold 6. Figures 3-8As shown, at this time, the front opening of the detection box 7 is separated from the sealing plate 1108, the rear opening of the detection box 7 is sealed from the sealing plate 1108, the front first spring 1007 is in a contracted state, the rear first spring 1007 is in a stretched state, the front convex rack 1009 and the gear 1004 are in a meshing state, the rear convex rack 1009 and the gear 1004 are in a separated state, and the front sampling box 1001 is in contact with the detection box 7, and the sealing valve plate 1002 inside the front sampling box 1001 is in an open state, so that air enters the front cavity of the detection box 7 through the air inlet pipe 6. At this time, the air passes through the internal round hole of the front sampling box 1001 and is discharged outward through the air outlet pipe 8 and the air outlet pipe 9.

[0037] When conducting sampling and testing, such as Figures 1-8 As shown, by controlling the servo motor 703 to drive the threaded rod 704 to rotate, and in conjunction with the threaded connection between the threaded rod 704 and the T-shaped plate 1010, the T-shaped plate 1010 can be moved backward, thereby synchronously driving the movable frame 1008 and the connecting plate 1006 to move backward. At this time, due to the elasticity of the first spring 1007, the two sampling boxes 1001 remain temporarily stationary. When the movable frame 1008 moves backward, it synchronously drives the convex rack 1009 to move. At this time, since the front convex rack 1009 is engaged with the gear 1004, In the current state, the rear convex rack 1009 and gear 1004 are separated. Through the meshing transmission between the front convex rack 1009 and gear 1004, the sealing valve plate 1002 inside the front sampling box 1001 is rotated under force. When the first spring 1007 returns to its original state (i.e., no force), the front convex rack 1009 and gear 1004 are exactly separated, and the rear convex rack 1009 and gear 1004 are exactly in contact. The front sealing valve plate 1002 has rotated exactly 90 degrees to seal the front sampling box 1001. Figure 10 As shown, this achieves the sealing effect of the gas sample inside the front sampling box 1001.

[0038] After the front sampling box 1001 is sealed, the rotation of the threaded rod 704 continues to move the T-shaped plate 1010 and the connecting plate 1006 backward. Since the first spring 1007 is fixed between the connecting plate 1006 and the sampling box 1001, and the rear sampling box 1001 is not obstructed, the connecting plate 1006 moves backward, simultaneously driving both sampling boxes 1001 to slide backward in the detection chamber 7 until the rear sampling box 1001 contacts the inner rear wall of the detection chamber 7 to achieve positioning. At this time, the front sampling box 1001 is moved to match the position of the ultraviolet emitter 702 and the chromatograph 701. Through the action of the ultraviolet emitter 702 and the chromatograph 701, the ammonia in the gas sample in the front sampling box 1001 can be detected. When the gas content is detected, and the rear sampling box 1001 contacts the inner rear wall of the detection box 7, the rotation of the threaded rod 704 causes the T-shaped plate 1010 and the connecting plate 1006 to move backward. At this time, the position of the sampling box 1001 is limited, causing the connecting plate 1006 to slide backward relative to the fixed rod 1005. At this time, the rear first spring 1007 is compressed and the front first spring 1007 is stretched. When the connecting plate 1006 slides backward relative to the fixed rod 1005, the movable frame 1008 moves backward synchronously. At this time, in conjunction with the meshing transmission between the rear convex rack 1009 and the gear 1004, the sealing valve plate 1002 inside the rear sampling box 1001 rotates and opens to facilitate the sampling operation.

[0039] The channel switching mechanism 11 includes a guide rod 1101 that is slidably connected to the detection box 7, and a second spring 1102 is fixed between the guide rod 1101 and the detection box 7. The guide rod 1101 is flush with the horizontal plate of the T-shaped plate 1010. A movable plate 1103 is also fixed on the guide rod 1101. An inclined groove 1104 is provided on the movable plate 1103. The inclined groove 1104 is slidably connected to the crossbar 1105. Meanwhile, slide rods 1106 are symmetrically fixed on the crossbar 1105. The slide rods 1106 are slidably connected to the detection box 7. A limit block 1107 is fixed on the slide rod 1106. The limit block 1107 contacts the detection box 7 to achieve positioning. A sealing plate 1108 is also fixed on the slide rod 1106. The sealing plate 1108 cooperates with the side opening of the detection box 7 to achieve a sealing effect.

[0040] During the operation of the device, such as Figures 3-9As shown, when the connecting plate 1006 moves backward and the first spring 1007 returns to its original state, the T-shaped plate 1010 separates from the front guide rod 1101. This causes the front guide rod 1101 to move backward and reset under the action of the second front spring 1102. As the front guide rod 1101 moves backward, it simultaneously drives the front movable plate 1103 and the inclined groove 1104 to move backward. Combined with the sliding action between the front inclined groove 1104 and the crossbar 1105, the front sliding rod 1106 and the sealing plate 1108 are forced downward until the limiting block 1107 contacts the detection box 7 to achieve positioning. At this time, the front sealing plate 1108 seals and blocks the front opening of the detection box 7. The rear sampling box 1001 contacts the inner rear wall of the detection box 7. At this time, the T-shaped plate 1010 is also in contact with the rear... When the guide rod 1101 contacts, and the connecting plate 1006 slides backward relative to the fixed rod 1005, the movable frame 1008 and the T-shaped plate 1010 move backward synchronously under force, so that the T-shaped plate 1010 provides force to the rear fixed rod 1005, causing the rear fixed rod 1005 to move backward. At this time, the rear second spring 1102 is compressed under force. When the rear fixed rod 1005 slides backward, it drives the rear movable plate 1103 and the inclined groove 1104 to move backward synchronously. With the sliding action between the rear inclined groove 1104 and the crossbar 1105, the rear sliding rod 1106 and the sealing plate 1108 can be moved upward under force, thereby releasing the sealing and blocking effect of the rear opening of the detection box 7, and allowing outside air to enter the round hole on the rear sampling box 1001 for sampling operation.

[0041] Based on the above principle, the servo motor 703 drives the threaded rod 704 to move the two sampling boxes 1001, which can realize the continuous individual sampling, sealing and detection of air, effectively avoiding the impact of air flow on the accuracy of the detection data.

[0042] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A high-temperature ultraviolet ammonia gas monitoring device, comprising a casing (1), an inlet pipe (2) installed on the casing (1), a detection box (7) installed inside the casing (1), and an outlet pipe (9) also installed on the casing (1), characterized in that: An air inlet manifold (6) is installed on the right side of the test box (7), and an air outlet manifold (8) is installed on the left side of the test box (7). The air outlet manifold (8) is connected to the air outlet pipe (9). A sampling mechanism (10) is used to individually sample and seal the gas to be detected. The sampling mechanism (10) is installed inside the detection box (7). A chromatograph (701) is fixedly installed on the detection box (7), and an ultraviolet emitter (702) is fixedly installed on the detection box (7) opposite the chromatograph (701). A servo motor (703) is fixedly installed on the outside of the detection box (7), and the servo motor (703) is connected to a threaded rod (704) with a bearing connected inside the detection box (7). The sampling mechanism (10) includes two sampling boxes (1001) that are slidably connected inside the detection box (7), and the two sampling boxes (1001) are fixed to each other by a fixing rod (1005). Two sealing valve plates (1002) are connected to the bearing inside the sampling box (1001), and the sealing valve plates (1002) cooperate with the round holes inside the sampling box (1001) to achieve a sealing effect. The sealing valve plates (1002) rotate 90° each time. A servo motor (703) is fixed on the sealing valve plate (1002). The device has a transparent glass (1003), and a gear (1004) is fixed on the rotating shaft of the sealing valve plate (1002), and the gear (1004) is located inside the sampling box (1001); a connecting plate (1006) is slidably connected to the fixing rod (1005), and a first spring (1007) is fixed between the connecting plate (1006) and the two sampling boxes (1001), and the connecting plate (1006) is fixedly connected to the movable frame (1008), while the movable frame (1008) is slidably connected to the sampling box (1001); a convex rack (1009) is fixed on the movable frame (1008), and the convex rack (1009) is meshed with the gear (1004); a T-shaped plate (1010) is also fixed on the movable frame (1008), and the T-shaped plate (1010) is threadedly connected to the threaded rod (704); The channel switching mechanism (11) is used to control the flow direction of the gas so that the gas flow position always cooperates with the sampling mechanism (10) to be sampled for sampling. The channel switching mechanism (11) is installed in the detection box (7).

2. The high-temperature ultraviolet ammonia monitoring device according to claim 1, characterized in that: The air inlet pipe (2) is connected to the air pump (3) fixed in the chassis (1). The air pump (3) is connected to the dust collector (4) through a conduit. The dust collector (4) is connected to the tubular water cooler (5) through a conduit. The tubular water cooler (5) is connected to the air inlet branch pipe (6) through a conduit.

3. The high-temperature ultraviolet ammonia monitoring device according to claim 1, characterized in that: The channel switching mechanism (11) includes a guide rod (1101) that is slidably connected to the detection box (7), and a second spring (1102) is fixed between the guide rod (1101) and the detection box (7), and the guide rod (1101) is flush with the horizontal plate of the T-shaped plate (1010).

4. The high-temperature ultraviolet ammonia monitoring device according to claim 3, characterized in that: A movable plate (1103) is also fixed on the guide rod (1101), and an inclined groove (1104) is provided on the movable plate (1103). The inclined groove (1104) is slidably connected to the crossbar (1105). Meanwhile, sliding rods (1106) are symmetrically fixed on the crossbar (1105), and the sliding rods (1106) are slidably connected to the detection box (7).

5. The high-temperature ultraviolet ammonia monitoring device according to claim 4, characterized in that: A limiting block (1107) is fixed on the slide rod (1106), and the limiting block (1107) contacts the detection box (7) to achieve positioning. A sealing plate (1108) is also fixed on the slide rod (1106), and the sealing plate (1108) cooperates with the side opening of the detection box (7) to achieve sealing.

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