A ventilation system failure monitoring device for an ammonia supply system

Abstract

The present invention belongs to the technical field of ammonia supply system, specifically a ventilation system failure monitoring device for an ammonia supply system, comprising a first fixed shell, a control terminal is installed in the first fixed shell, a switch cover is threadedly installed on the first fixed shell, an alarm electrically connected to the control terminal is installed on the first fixed shell, a connecting frame is installed on the first fixed shell, a first air guide shell is fixedly connected to the connecting frame, a first detection unit electrically connected to the control terminal is threadedly installed in the first air guide shell, a second air guide shell is fixedly connected and connected to the side wall of the first air guide shell near the first detection unit, the second air guide shell is connected to a third air guide shell, and a diversion mechanism is arranged on the first air guide shell. The present invention enables the first detection unit to monitor the amount of ammonia in the air in real time through the connection setting of the first air guide shell and the second air guide shell, so as to avoid residual gas affecting the accuracy of subsequent detection results.

Description

Technical Field

[0001] The present invention belongs to the technical field of ammonia supply systems, and in particular relates to a ventilation system failure monitoring device for an ammonia supply system. Background Art

[0002] 90% of the cargo transportation volume in the world trade is undertaken by the shipping industry, so the consumption of marine fuel is relatively huge. Ammonia is a new type of fuel. Its main components after complete combustion are water and nitrogen, which has the advantage of zero carbon emissions. When using ammonia as a fuel for the marine engine power system, an ammonia detector is usually installed in the cabin to detect the ammonia content in the air to prevent ammonia leakage from endangering the personal safety of operators. The working principle of existing ammonia detectors is usually based on two types of sensors: electrochemical sensors and semiconductor sensors.

[0003] When monitoring the ammonia concentration in the environment, the existing ammonia detector usually uses an inverted cover on the ammonia detector to collect the floating ammonia, and then the ammonia in the gas reacts with the sensor in the cover of the ammonia detector to detect the concentration of ammonia. However, in this process, due to the single opening of the inverted cover, it is difficult for the gas inside to flow and replace, and through the cooperation of the ventilation system in the ship, it is not easy for the ammonia in the flowing air to enter the ammonia detector, resulting in deviations in the detection value of the ammonia detector, affecting the accuracy of the monitoring results. Summary of the invention

[0004] The object of the present invention is to provide a ventilation system failure monitoring device for an ammonia supply system to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A ventilation system failure monitoring device for an ammonia supply system, comprising a first fixed shell, a control terminal is installed in the first fixed shell, a switch cover is threadedly installed on the first fixed shell, an alarm electrically connected to the control terminal is installed in the first fixed shell, a connecting frame is installed in the first fixed shell, a first air guide shell is fixedly connected to the connecting frame, a first detection unit electrically connected to the control terminal is threadedly installed in the first air guide shell, a second air guide shell is fixedly connected and connected to a portion of the first air guide shell near the first detection unit, the second air guide shell is connected to a third air guide shell, and a diversion mechanism is provided on the first air guide shell.

[0006] Preferably, the diversion mechanism includes a first air guide tube, which is fixedly connected to and communicated with a side of the first air guide shell away from the first detection unit, the first air guide shell is fixedly connected to and communicated with a second air guide tube, a side wall of the first air guide shell is fixedly connected to a dual-axis motor electrically connected to the control terminal, an upper output shaft of the dual-axis motor penetrates the first air guide shell and is rotatably connected to the first air guide shell, the first air guide shell is rotatably provided with a rotating shell fixedly connected to the output shaft on the dual-axis motor, the rotating shell is provided with a through hole, a screening assembly is commonly provided on the first air guide tube and the second air guide tube, and a stirring assembly is provided on the rotating shell.

[0007] Preferably, the side walls of the first flow guide pipe and the second flow guide pipe are fixedly connected to and communicated with third flow guide pipes equidistantly distributed circumferentially, and the lower ends of the third flow guide pipes are higher than the lower ends of the first flow guide pipe and the second flow guide pipe.

[0008] Preferably, the screening assembly comprises two symmetrical sliding frames, which are respectively slidably arranged on the first flow guide tube and the second flow guide tube, and tension springs are respectively installed between the first flow guide tube and the second flow guide tube and the adjacent sliding frames, a screen is installed in the sliding frame, the lower output shaft of the dual-axis motor is fixedly connected to a turntable, the side wall of the turntable is fixedly connected to limit rods equidistantly distributed circumferentially, and the sliding frame is provided with a convex column which is squeezed and matched with the adjacent limit rod.

[0009] Preferably, the stirring assembly includes a fixed rod, the fixed rod is fixedly connected to the rotating shell, the fixed rod is fixedly connected to a rotating frame, and the first detection unit and the first air guide shell are both in contact with and cooperate with the rotating frame.

[0010] Preferably, it also includes a flow control mechanism, which is arranged on the second air guide shell, and the flow control mechanism includes a first fixed frame, which is fixedly connected to the second air guide shell, and the first fixed frame is slidably provided with a first sliding plate, which penetrates the second air guide shell and is slidably connected thereto, a flow rate sensor electrically connected to the control terminal is installed in the second air guide shell, and the first fixed frame is installed with a first electric push rod, the telescopic end of the first electric push rod is fixedly connected to the first sliding plate, and the first electric push rod is electrically connected to the control terminal.

[0011] Preferably, it also includes an adsorption mechanism, which is arranged on the third air guide shell, and the adsorption mechanism includes a fourth air guide duct, which is fixedly connected to and connected to the third air guide shell, and a partition plate is arranged in the third air guide shell, and the fourth air guide duct is connected to the fifth air guide duct, and a second detection unit electrically connected to the control terminal is installed on the fifth air guide duct, and an electric fan electrically connected to the control terminal is installed in the fourth air guide duct, a sealing component is arranged on the fourth air guide duct, and a cooling component is arranged on the fifth air guide duct.

[0012] Preferably, the blocking assembly includes a second fixed frame, the second fixed frame is fixedly connected to the side wall of the fourth air duct, the second fixed frame is slidably provided with a second sliding plate, the second sliding plate penetrates the fourth air duct and is slidably connected thereto, the second fixed frame is fixedly connected to a second electric push rod electrically connected to the control terminal, the telescopic end of the second electric push rod is fixedly connected to the second sliding plate, a sliding sleeve fixedly connected to the second sliding plate is slidably provided in the fifth air duct, the sliding sleeve is provided with through holes equidistantly distributed in the circumferential direction, a screen is installed in the through holes of the sliding sleeve, and the fifth air duct cooperates with the through holes on the sliding sleeve for blocking.

[0013] Preferably, the cooling assembly includes a spiral tube, which is fixed to the side wall of the fifth air duct, and the upper end of the spiral tube is fixed to and communicated with the fourth air duct, and the spiral tube is fixed to a third fixed frame, and the third fixed frame is slidably provided with a third sliding plate that penetrates the spiral tube and is slidably connected thereto, and the third fixed frame is fixed to a second fixed shell via a connecting rod, and the second fixed shell is slidably provided with a sliding plug that is fixed to the third sliding plate.

[0014] Preferably, the second fixed shell is made of a heat-conducting material, the second fixed shell and the sliding plug cooperate to form a chamber, and the chambers of the second fixed shell and the sliding plug are filled with a liquid with a large volume expansion coefficient.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention enables the first detection unit to monitor the amount of ammonia in the air in real time by connecting the first air guide shell and the second air guide shell, thereby preventing residual gas from affecting the accuracy of subsequent detection results; by working the dual-axis motor, the connection relationship between the first air guide tube and the second air guide tube and the first air guide shell is changed, thereby monitoring the total amount of ammonia in the gas over a period of time, and further improving the accuracy of the detection result by comparing the continuous monitoring value with the total monitoring value; by separating the rotating frame, the gas can be uniformly surrounded by the first detection unit, thereby improving the accuracy of the data measured by the first detection unit; by moving and adjusting the first sliding plate, the retention time of the gas in the first air guide shell is controlled, so that the first detection unit can accurately detect the amount of ammonia in the air, thereby improving the accuracy of the present invention; by moving the second sliding plate and the sliding sleeve, the quantitative gas is separated in the fifth air guide tube, and combined with the difference in the flowing gas in the spiral tube, the temperature of the gas in the fifth air guide tube is always kept stable, thereby reducing the influence of external factors on the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the cross-sectional three-dimensional structure of the components of the connecting frame and the first air guide housing of the present invention;

[0019] Figure 3 It is a schematic diagram of the cross-sectional three-dimensional structure of the screening assembly of the present invention;

[0020] Figure 4 It is a cross-sectional three-dimensional structural schematic diagram of the flow control mechanism of the present invention;

[0021] Figure 5 It is a schematic diagram of the cross-sectional three-dimensional structure of the plugging assembly of the present invention;

[0022] Figure 6 It is a schematic diagram of the cross-sectional three-dimensional structure of the cooling assembly of the present invention.

[0023] In the figure: 1. first fixed shell; 11. control terminal; 12. switch cover; 13. alarm; 131. connecting frame; 14. first air guide shell; 15. first detection unit; 16. second air guide shell; 17. third air guide shell; 2. first air guide tube; 21. second air guide tube; 22. double-axis motor; 23. rotating shell; 3. third air guide tube; 4. sliding frame; 41. turntable; 42. limit rod; 5. fixed rod; 51. rotating frame; 6. first fixed frame; 61. first sliding plate; 62. first electric push rod; 7. fourth air guide tube; 71. fifth air guide tube; 72. second detection unit; 73. electric fan; 8. second fixed frame; 81. second sliding plate; 82. second electric push rod; 83. sliding sleeve; 9. spiral tube; 91. third fixed frame; 92. third sliding plate; 93. second fixed shell; 94. sliding plug. DETAILED DESCRIPTION

[0024] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0025] Research has found that when monitoring ammonia concentration, existing ammonia detectors often use an inverted hood to collect ammonia in the air, and then frequently detect the ammonia concentration through the sensor on the ammonia detector. However, during this process, the air in the inverted hood remains relatively static, making it difficult for ammonia in the flowing gas to enter the ammonia detector, resulting in errors in the test results.

[0026] In response to this discovery, the present invention designs a monitoring device that can stably detect ammonia in flowing air.

[0027] Embodiment 1: A ventilation system failure monitoring device for an ammonia supply system, such as Figure 1 and Figure 2 As shown, it includes a first fixed shell 1, a control terminal 11 is installed in the first fixed shell 1, a switch cover 12 is threadedly installed on the first fixed shell 1, the middle part of the switch cover 12 is set as transparent glass, an alarm 13 electrically connected to the control terminal 11 is installed on the first fixed shell 1, a connecting frame 131 is installed on the first fixed shell 1, a first air guide shell 14 is fixedly connected to the connecting frame 131, a first detection unit 15 electrically connected to the control terminal 11 is threadedly installed on the upper part of the first air guide shell 14, an electrochemical sensor is arranged in the first detection unit 15, a second air guide shell 16 is fixedly connected to and connected to the right side of the first air guide shell 14, a third air guide shell 17 is connected to the right side of the second air guide shell 16, a screen is arranged at the front end of the third air guide shell 17, a diversion mechanism for changing the air intake channel is arranged on the first air guide shell 14, and air is continuously guided through the first detection unit 15 by the first air guide shell 14 and the second air guide shell 16, so that the first detection unit 15 can monitor the ammonia content in the air in real time, thereby improving the accuracy of the monitoring result.

[0028] like Figure 2 and Figure 3 As shown, the flow diversion mechanism includes a first air guide tube 2, the first air guide tube 2 is fixedly connected to and communicated with the lower part of the first air guide shell 14, the first air guide shell 14 is fixedly connected to and communicated with a second air guide tube 21, the second air guide tube 21 and the first air guide tube 2 are symmetrically distributed, the lower side of the first air guide shell 14 is fixedly connected to a double-axis motor 22 electrically connected to the control terminal 11, the upper output shaft of the double-axis motor 22 penetrates the first air guide shell 14 and is rotatably connected thereto, the inner lower part of the first air guide shell 14 is rotatably provided with a rotating shell 23 fixedly connected to the output shaft on the double-axis motor 22, the rotating shell 23 is provided with a through hole for alternately connecting the first air guide tube 2 and the second air guide tube 21, and the first air guide tube 2 and the second air guide tube 21 are jointly provided with A screening component is used to filter impurities in the air. A stirring component is provided on the rotating shell 23 for stirring the gas in the first air guide shell 14. The side walls of the first guide tube 2 and the second guide tube 21 are fixedly connected and connected to the third guide tube 3 which is equidistantly distributed circumferentially, and the lower end of the third guide tube 3 is higher than the lower end of the first guide tube 2 and the lower end of the second guide tube 21. The ammonia gas continues to accumulate therein through the blocking of the second guide tube 21. The subsequent first detection unit 15 can detect the total amount of ammonia gas in this time period; when the concentration of the ammonia gas triggers the alarm 13 to sound an alarm, the staff is reminded to repair the ammonia gas delivery pipeline to avoid continuous leakage of trace ammonia gas, thereby reducing the loss of ammonia gas.

[0029] like Figure 2 and Figure 3 As shown, the screening assembly includes two sliding frames 4 that are symmetrical on both sides. The two sliding frames 4 are slidably arranged on the first guide tube 2 and the second guide tube 21 respectively, and tension springs are installed between the first guide tube 2 and the second guide tube 21 and the adjacent sliding frames 4 respectively. The two tension springs are respectively sleeved on the outer sides of the first guide tube 2 and the second guide tube 21. A screen for filtering impurities in the air is installed in the middle of the two sliding frames 4. The lower output shaft of the dual-axis motor 22 is fixedly connected to a turntable 41, and the side wall of the turntable 41 is fixedly connected to eight limiting rods 42 that are equidistantly distributed in the circumferential direction. The sliding frame 4 is provided with a convex column that is squeezed and matched with the adjacent limiting rod 42. When the dual-axis motor 22 works, the limiting rod 42 squeezes the convex column on the sliding frame 4, and then cooperates with the tension of the tension spring to make the sliding frame 4 intermittently shake, so as to avoid excessive impurities adhering to the screen on the sliding frame 4 and improve the accuracy of subsequent monitoring results.

[0030] like Figure 3As shown, the stirring assembly includes a fixed rod 5, which is fixedly connected to the rotating shell 23. The upper part of the fixed rod 5 is fixedly connected to a rotating frame 51. The lower part of the first detection unit 15 and the inner wall of the first gas guide shell 14 are in contact with the rotating frame 51. Through the separation of the rotating frame 51, the ammonia in the gas is facilitated to uniformly contact with the electrochemical sensor on the first detection unit 15, thereby improving the accuracy of the monitoring results.

[0031] In the process of using the present invention, the operator first installs the first fixed shell 1 near the ammonia supply pipeline in the chamber of the ship, and arranges the number of monitoring devices according to the area and ventilation conditions of the area. After the installation is completed, the control terminals 11 of all monitoring devices are powered on and connected to the remote control console through the Internet of Things. During the working process, the ventilation system in the ship works to circulate the indoor air. During the gas circulation process, the gas flows through the first guide pipe 2, the second guide pipe 21 and the eight third guide pipes 3. In the initial state, the through hole on the rotating shell 23 is connected to the first guide pipe 2, and then the gas in the first guide pipe 2 and the four third guide pipes 3 thereon enters the first air guide shell 14 through the through hole on the rotating shell 23, and then the gas passes through the second air guide shell 16 and the third air guide shell 17. During this process, the first detection unit 15 uses an electrochemical sensor to stably monitor and analyze the ammonia in the flowing air to improve the accuracy of the monitoring results, wherein the first guide pipe 2 and the four third guide pipes 3 respectively sample and mix the gas in different areas, thereby improving the accuracy of the ammonia concentration monitored by the present invention.

[0032] When monitoring the ammonia pipeline, when the first detection unit 15 at that location detects that the ammonia content in the air reaches 20% of the lower explosion limit, the control terminal 11 triggers the alarm 13, and the alarm 13 buzzes and the light flashes. At the same time, the control terminal 11 transmits a signal to the remote control console through the Internet of Things to remind the staff to repair the ammonia pipeline in the area; when the first detection unit 15 in two of the monitoring devices detects that the ammonia content reaches 40% of the lower explosion limit, the safety system is triggered.

[0033] When monitoring the ventilation duct in the cabin, when the first detection unit 15 in the duct detects that the ammonia content therein reaches 30% of the lower explosion limit, an audible and visual alarm is triggered; when the first detection unit 15 in the two monitoring devices in the area detects that the ammonia content reaches 60% of the lower explosion limit, the safety system is triggered, and the control terminal 11 will control the main gas valve to be closed (the main gas valve can also be remotely closed in areas such as the cab, monitoring room, and the control console of the filling station on the main deck).

[0034] During the working process of the present invention, the control terminal 11 intermittently controls the dual-axis motor 22 to start, and the dual-axis motor 22 drives the rotating shell 23 to rotate 180°. The rotating shell 23 rotates so that the upper through hole is connected to the second guide tube 21. At this time, the second guide tube 21 and the four third guide tubes 3 thereon intercept and collect the floating ammonia for a long time. When the connecting pipeline is switched, the gas in the second guide tube 21 and the four third guide tubes 3 thereon flows into the first gas guide shell 14. At this time, the first detection unit 15 detects the total amount of ammonia in this time period, and then compares the detection value with the continuous detection value of the previous period to ensure the accuracy of the ammonia concentration measured in this area. At the same time, with the accumulation of ammonia in this time period, the ammonia concentration will reach about 20% of the lower explosion limit. At this time, the first detection unit 15 triggers the alarm 13 through the control terminal 11 to remind the staff to promptly repair the trace and continuous leakage of ammonia delivery pipeline to reduce the waste of ammonia.

[0035] During the above monitoring process, the screens on the sliding frames 4 in the first air guide tube 2 and the second air guide tube 21 simultaneously filter dust and other impurities in the air. Whenever the dual-axis motor 22 works once, the output shaft on the lower side of the dual-axis motor 22 drives the turntable 41 and multiple limit rods 42 to rotate together. During this process, the corresponding limit rods 42 swing to squeeze the convex columns of the adjacent sliding frames 4. The squeezed sliding frames 4 move downward and stretch the connected tension springs. When the limit rods 42 release the squeezing of the convex columns on the adjacent sliding frames 4, the sliding frames 4 move in the opposite direction and reset under the tension of the tension springs, so that the sliding frames 4 vibrate back and forth up and down, accelerate the detachment of impurities attached to the screen on the sliding frames 4, ensure that the gas smoothly enters the first air guide shell 14, and further improve the accuracy of the monitoring results.

[0036] During the flow of gas in the first gas guide shell 14, the ammonia in the gas is evenly distributed on the electrochemical sensor on the first detection unit 15 due to the limiting effect of the rotating frame 51. The first detection unit 15 fully reacts with the ammonia in the gas and accurately detects the ammonia concentration. The dual-axis motor 22 works to rotate the rotating shell 23 180°. The rotating shell 23 drives the rotating frame 51 to rotate 180° through the fixed rod 5. The rotating frame 51 rotates to stir the gas in the first gas guide shell 14, reduce gas residue, and improve the accuracy of the first detection unit 15 in detecting the ammonia concentration in the gas.

[0037] As the present invention is used, it is necessary to regularly perform maintenance and repair on the present invention, and regularly replace the first detection unit 15 to ensure the accuracy of the present invention in real-time detection of the ammonia concentration in the air.

[0038] Embodiment 2: Based on Embodiment 1, Figure 2 and Figure 4As shown, it also includes a flow control mechanism, which is arranged on the second air guide shell 16. The flow control mechanism is used to control the residence time of the gas in the first air guide shell 14. The flow control mechanism includes a first fixed frame 6, which is fixedly connected to the front side of the second air guide shell 16. A first sliding plate 61 that penetrates the second air guide shell 16 and is slidably connected thereto is slidably arranged in the first fixed frame 6. The first sliding plate 61 is used to change the cross-section of the gas flow in the second air guide shell 16 and control the flow speed of the gas in the first air guide shell 14, so that the first detection unit 15 can accurately detect the ammonia content in the air. A flow rate sensor electrically connected to the control terminal 11 is installed in the second air guide shell 16. A first electric push rod 62 is installed in the first fixed frame 6. The telescopic end of the first electric push rod 62 is fixedly connected to the first sliding plate 61, and the first electric push rod 62 is electrically connected to the control terminal 11.

[0039] In the process of monitoring the ammonia concentration in the gas, the flow rate sensor in the second air guide shell 16 detects the flow rate of the air therein. Affected by the changes in the indoor ventilation system, when the flow rate of the gas in the first air guide shell 14 and the second air guide shell 16 increases, the flow rate sensor controls the first electric push rod 62 to work through the control terminal 11. The first electric push rod 62 drives the first sliding plate 61 to move backward, so that the cross-section of the gas flow in the second air guide shell 16 becomes smaller, thereby extending the residence time of the gas in the first air guide shell 14, thereby improving the accuracy of the first detection unit 15 in detecting the ammonia concentration in the gas.

[0040] Embodiment 3: Based on Embodiment 2, Figure 4 and Figure 5 As shown, it also includes an adsorption mechanism, which is arranged on the third air guide shell 17. The adsorption mechanism is used to supplement the detection air. The adsorption mechanism includes a fourth air guide pipe 7, which is fixedly connected to and connected to the right part of the third air guide shell 17. A partition plate is arranged in the third air guide shell 17. The right part of the fourth air guide pipe 7 is connected to the fifth air guide pipe 71. A second detection unit 72 electrically connected to the control terminal 11 is installed on the upper part of the fifth air guide pipe 71. An electrochemical sensor is arranged in the second detection unit 72. An electric fan 73 is installed in the fourth air guide pipe 7. The electric fan 73 is electrically connected to the control terminal 11. A blocking component is arranged on the fourth air guide pipe 7. The blocking component is used to block the fourth air guide pipe 7 and the fifth air guide pipe 71. A cooling component is arranged on the fifth air guide pipe 71. The cooling component is used to adjust the temperature of the gas in the fifth air guide pipe 71. When the electric fan 73 works, the external gas is drawn into the fifth air guide pipe 71, and then cooperates with the second detection unit 72 to further monitor the amount of ammonia in the air.

[0041] like Figure 4 and Figure 5As shown, the blocking component includes a second fixed frame 8, which is fixed to the lower side of the fourth air duct 7, and the second fixed frame 8 is located on the right side of the electric fan 73. A second sliding plate 81 that penetrates the fourth air duct 7 and is slidably connected thereto is slidably provided in the second fixed frame 8, a second electric push rod 82 that is electrically connected to the control terminal 11 is fixedly connected to the second fixed frame 8, and the telescopic end of the second electric push rod 82 is fixedly connected to the second sliding plate 81, and a sliding sleeve 83 is slidably provided in the fifth air duct 71, and the sliding sleeve 83 is fixedly connected to the second sliding plate 81. The sliding sleeve 83 is provided with four through holes that are equidistantly distributed in the circumferential direction, and screens are installed in the four through holes of the sliding sleeve 83. The fifth air duct 71 cooperates with the through holes on the sliding sleeve 83 to block the through holes, and the fourth air duct 7 is blocked by the second sliding plate 81, and the through holes on the sliding sleeve 83 are blocked by the fifth air duct 71, so as to monitor the amount of ammonia in the quantitative air, thereby further improving the accuracy of the monitoring results.

[0042] like Figure 4 and Figure 6 As shown, the cooling assembly includes a spiral tube 9, which is fixed to the lower side of the fifth air duct 71, and the spiral tube 9 is wound around the lower part of the fifth air duct 71. The upper end of the spiral tube 9 is fixed to and communicated with the front side of the fourth air duct 7, and the connecting port of the spiral tube 9 and the fourth air duct 7 is located on the left side of the second sliding plate 81. The front side of the spiral tube 9 is fixed to a third fixed frame 91, and the third fixed frame 91 is slidably provided with a third sliding plate 92. The third sliding plate 92 penetrates the spiral tube 9 and is slidably connected thereto. The front part of the third fixed frame 91 is fixed to a second fixed shell 93 through a connecting rod. The second fixed shell 93 is set to a heat-conducting material, and a sliding plug 94 fixedly connected to the third sliding plate 92 is slidingly set at the rear of the second fixed shell 93. The second fixed shell 93 and the sliding plug 94 cooperate to form a chamber. The chamber of the second fixed shell 93 and the sliding plug 94 is filled with a liquid with a large volume expansion coefficient. The indoor temperature is monitored by the liquid in the second fixed shell 93, and the size of the flow cross-section in the spiral tube 9 is adjusted, so that the gas extracted in different time periods is always at the same temperature, thereby improving the stability of the detected data of the present invention and reducing the influence of external factors on the detection results.

[0043] In the process of monitoring the ammonia concentration in the gas according to the present invention, the control terminal 11 intermittently controls the second electric push rod 82 and the electric fan 73 to start at the same time. The second electric push rod 82 works first to move the second sliding plate 81 and the sliding sleeve 83 downward. The second sliding plate 81 moves to release the blocking of the fourth air duct 7. The sliding sleeve 83 moves to release the fifth air duct 71 from blocking the through hole thereon. Then the electric fan 73 works continuously. The electric fan 73 works to allow external gas to enter the fifth air duct 71 through the screen at the through hole on the sliding sleeve 83. Then the gas is discharged from the third air duct shell 17 through the fourth air duct 7. After the electric fan 73 is turned on for a period of time, the control terminal 11 controls the second electric push rod 82 to work in the reverse direction and reset. The second electric push rod 82 works to move the second sliding plate 81 and the sliding sleeve 83 upward. The second sliding plate 81 moves upward to block the fourth air duct 7. The sliding sleeve 83 moves upward to block the lower end of the fifth air duct 71.

[0044] After the second electric push rod 82 finishes working, a certain volume of gas fills the fifth air duct 71, and then the electric fan 73 continues to work, so that the external gas enters the left part of the fourth air duct 7 through the spiral tube 9, wherein the gas flowing in the spiral tube 9 reduces the concentration of the fifth air duct 71. At this time, the second detection unit 72 works to monitor the concentration of ammonia in the gas. In this process, as the indoor temperature rises, the gas temperature is transmitted to the liquid with a large volume expansion coefficient therein through the second fixed shell 93. The liquid expands due to heat, and the expanded liquid squeezes the sliding plug 94 and the third sliding plate 92 to move them. The movement of the third sliding plate 92 reduces the obstruction of the flow cross section in the spiral tube 9, thereby increasing the gas flow rate in the spiral tube 9 and accelerating the cooling rate of the gas in the fifth air duct 71, so that the second detection unit 72 can always monitor the ammonia concentration in the gas at a constant temperature, thereby improving the stability of the data detected by the present invention and further reducing the influence of external factors on the detection results.

[0045] The above describes the specific implementation of the present invention with reference to the accompanying drawings, but does not limit the scope of the present invention. Any modification, equivalent substitution and improvement made by those skilled in the art without departing from the scope and essence of the present invention shall be within the scope of the present invention.

Claims

1. An ammonia gas pipeline leakage detection device, comprising a first fixed shell (1), a control terminal (11) is installed in the first fixed shell (1), a switch cover (12) is threadedly installed on the first fixed shell (1), an alarm (13) electrically connected to the control terminal (11) is installed in the first fixed shell (1), a connecting frame (131) is installed in the first fixed shell (1), a first air guide shell (14) is fixedly connected to the connecting frame (131), and a first detection unit (15) electrically connected to the control terminal (11) is threadedly installed in the first air guide shell (14), wherein: It also comprises a second air guide housing (16), the second air guide housing (16) being fixedly connected to and connected to a portion of the first air guide housing (14) close to the first detection unit (15), the second air guide housing (16) being connected to a third air guide housing (17), and the first air guide housing (14) being provided with a flow diversion mechanism; The flow diversion mechanism comprises a first flow guide pipe (2), the first flow guide pipe (2) being fixedly connected to and in communication with a side of the first air guide shell (14) away from the first detection unit (15), the first air guide shell (14) being fixedly connected to and in communication with a second flow guide pipe (21), a double-axis motor (22) being fixedly connected to a side wall of the first air guide shell (14) and being electrically connected to the control terminal (11), an upper output shaft of the double-axis motor (22) penetrating the first air guide shell (14) and being rotatably connected thereto, a rotating shell (23) being rotatably provided on the first air guide shell (14) and being fixedly connected to the output shaft on the double-axis motor (22), the rotating shell (23) being provided with a through hole, a screening assembly being provided on the first flow guide pipe (2) and the second flow guide pipe (21), and a stirring assembly being provided on the rotating shell (23); The invention also comprises a flow control mechanism, the flow control mechanism is arranged on the second air guide shell (16), the flow control mechanism comprises a first fixed frame (6), the first fixed frame (6) is fixedly connected to the second air guide shell (16), the first fixed frame (6) is slidably provided with a first sliding plate (61), the first sliding plate (61) penetrates the second air guide shell (16) and is slidably connected thereto, a flow rate sensor electrically connected to the control terminal (11) is installed in the second air guide shell (16), the first fixed frame (6) is installed with a first electric push rod (62), the telescopic end of the first electric push rod (62) is fixedly connected to the first sliding plate (61), and the first electric push rod (62) is electrically connected to the control terminal (11); The device further comprises an adsorption mechanism, the adsorption mechanism being arranged on the third air guide shell (17), the adsorption mechanism comprising a fourth air guide tube (7), the fourth air guide tube (7) being fixedly connected to and in communication with the third air guide shell (17), a partition plate being arranged in the third air guide shell (17), the fourth air guide tube (7) being in communication with a fifth air guide tube (71), a second detection unit (72) being electrically connected to the control terminal (11) being installed in the fifth air guide tube (71), an electric fan (73) being electrically connected to the control terminal (11) being installed in the fourth air guide tube (7), a blocking component being arranged on the fourth air guide tube (7), and a cooling component being arranged on the fifth air guide tube (71); The blocking component comprises a second fixed frame (8), the second fixed frame (8) being fixedly connected to the side wall of the fourth air duct (7), the second fixed frame (8) being slidably provided with a second sliding plate (81), the second sliding plate (81) penetrating the fourth air duct (7) and being slidably connected thereto, the second fixed frame (8) being fixedly connected with a second electric push rod (82) electrically connected to the control terminal (11), the telescopic end of the second electric push rod (82) being fixedly connected to the second sliding plate (81), the fifth air duct (71) being slidably provided with a sliding sleeve (83) fixedly connected to the second sliding plate (81), the sliding sleeve (83) being provided with through holes equidistantly distributed in the circumferential direction, a screen being installed in the through holes of the sliding sleeve (83), and the fifth air duct (71) being sealed and matched with the through holes on the sliding sleeve (83).

2. The ammonia gas pipeline leakage detection device according to claim 1, characterized in that: The side walls of the first flow guide tube (2) and the second flow guide tube (21) are both fixedly connected to and communicated with third flow guide tubes (3) equidistantly distributed in the circumferential direction, and the lower ends of the third flow guide tubes (3) are higher than the lower ends of the first flow guide tube (2) and the lower ends of the second flow guide tube (21).

3. The ammonia gas pipeline leakage detection device according to claim 1, characterized in that: The screening assembly comprises two symmetrical sliding frames (4), the two sliding frames (4) being slidably arranged on the first flow guide tube (2) and the second flow guide tube (21), respectively, and tension springs being installed between the first flow guide tube (2) and the second flow guide tube (21) and the adjacent sliding frames (4), a screen being installed in the sliding frames (4), a rotating disk (41) being fixedly connected to the lower output shaft of the dual-axis motor (22), limiting rods (42) being fixedly connected to the side wall of the rotating disk (41) being circumferentially equidistantly distributed, and a convex column being extruded and matched with the adjacent limiting rods (42) being arranged on the sliding frames (4).

4. The ammonia gas pipeline leakage detection device according to claim 1, characterized in that: The stirring assembly comprises a fixed rod (5), the fixed rod (5) being fixedly connected to the rotating shell (23), the fixed rod (5) being fixedly connected to a rotating frame (51), and the first detection unit (15) and the first air guide shell (14) both being in contact with and cooperating with the rotating frame (51).

5. The ammonia gas pipeline leakage detection device according to claim 1, characterized in that: The cooling assembly comprises a spiral tube (9), the spiral tube (9) being fixedly connected to the side wall of the fifth air guide tube (71), the upper end of the spiral tube (9) being fixedly connected to and in communication with the fourth air guide tube (7), the spiral tube (9) being fixedly connected to a third fixed frame (91), the third fixed frame (91) being slidably provided with a third sliding plate (92) penetrating the spiral tube (9) and being slidably connected thereto, the third fixed frame (91) being fixedly connected to a second fixed shell (93) via a connecting rod, the second fixed shell (93) being slidably provided with a sliding plug (94) fixedly connected to the third sliding plate (92).

6. The ammonia gas pipeline leakage detection device according to claim 5, characterized in that: The second fixed shell (93) is made of a heat-conducting material, the second fixed shell (93) and the sliding plug (94) cooperate to form a chamber, and the chambers of the second fixed shell (93) and the sliding plug (94) are filled with a liquid with a large volume expansion coefficient.

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