A greenhouse gas emission concentration on-line monitoring device

Abstract

The application discloses a greenhouse gas emission concentration on-line monitoring device and relates to the technical field of detection. The device comprises a monitoring cabinet, a monitoring device arranged in the monitoring cabinet, a dehumidification cabinet fixedly installed at the bottom of the monitoring device, an air inlet pipe fixedly installed at the bottom of the dehumidification cabinet, a lower air inlet and a right air inlet arranged on the air inlet pipe, a fixing ring fixedly installed on the inner wall of the air inlet pipe, an electric telescopic rod fixedly installed on the inner wall of the fixing ring, a sealing circular plate fixedly installed on the output end of the electric telescopic rod, a baffle fixedly installed on the right side of the output end of the electric telescopic rod, an L-shaped plate fixedly installed on the top of the sealing circular plate, and a long rod fixedly installed on the top of the L-shaped plate. The electric telescopic rod is moved upward, so that a large amount of moisture contained in air in rainy days is prevented from entering the monitoring device, the concentration monitored by the monitoring device is prevented from being low, and the data result is prevented from being affected.

Description

Technical Field

[0001] This invention belongs to the field of detection, specifically relating to an online monitoring device for greenhouse gas emission concentrations. Background Technology

[0002] The continued emission of greenhouse gases will cause the climate system to continue to warm and change its composition. Greenhouse gases include carbon dioxide and methane. When moisture in the air enters the equipment during rainy days, it will affect the monitoring.

[0003] Patent publication number CN219391951U relates to an online monitoring device for greenhouse gas emission concentrations, including a base with bolts on the front side and a groove on one side of the base. A housing is located within the groove, with sliders at the upper and lower ends of the housing. An air inlet is located on one side of the housing, and an air pump is located on the inner wall of the housing. A first solenoid valve is located at the output end of the air pump, and a gas storage pipe is located at the output end of the first solenoid valve. A gas detection sensor is located within the gas storage pipe, and a second solenoid valve is located at the other end of the gas storage pipe. An outlet pipe is located at the output end of the second solenoid valve. A display is located at the front end of the housing, and a buzzer is located on the inner wall of the housing. A first magnet is located on one side of the housing. This patent requires that, when used externally, the housing be slid out of the groove, the air pump be activated to draw gas into the gas storage pipe, and the first and second solenoid valves be closed to facilitate gas collection.

[0004] In the existing technology, the outer casing is slid out of the slide groove, the air pump is started to draw gas into the gas storage pipe, and the first solenoid valve and the second solenoid valve are closed to facilitate gas collection. However, on rainy days, the air contains a lot of water vapor. If the water vapor directly enters the monitoring equipment, it will cause large fluctuations in the measured values ​​and make it impossible to compare the concentrations of high and low layers. At the same time, water vapor will accumulate in the equipment for a long time, which will cause the equipment to age and corrode, affecting the service life of the equipment. Summary of the Invention

[0005] Various embodiments of the disclosed technology relate to an online monitoring device for greenhouse gas emission concentrations that can improve the accuracy of rainy weather monitoring.

[0006] According to the disclosed embodiments, an online monitoring device for greenhouse gas emission concentration includes: a monitoring cabinet, inside which a monitoring device is installed; a dehumidifying cabinet is fixedly installed at the bottom of the monitoring device; an air inlet pipe is fixedly installed at the bottom of the dehumidifying cabinet; the air inlet pipe has a lower air inlet and a right air inlet; a fixing ring is fixedly installed on the inner wall of the air inlet pipe; an electric telescopic rod is fixedly installed on the inner wall of the fixing ring; a sealing circular plate is fixedly installed at the output end of the electric telescopic rod; a baffle is fixedly installed on the right side of the output end of the electric telescopic rod; an L-shaped plate is fixedly installed on the top of the sealing circular plate; and a long rod is fixedly installed on the top of the L-shaped plate. The electric telescopic rod moves upwards via its output end. The upward movement of the telescopic rod output end causes the sealing disc to move upward, which in turn causes the baffle to move upward, sealing the right air inlet. Air then enters the dehumidifier cabinet through the lower air inlet. A partition is fixedly installed on the inner wall of the dehumidifier cabinet, with a sliding plate slidably installed at the bottom of the partition. A guide plate is fixedly installed at the bottom of the sliding plate, and a groove is formed on the surface of the guide plate. A push plate is fixedly installed at the top of the long rod. The sliding plate moving towards the condenser causes the sealing slide plate to move towards the condenser. The sealing slide plate, moving towards the condenser, contacts the fixed plate, sealing the right side of the partition.

[0007] In some implementations, a fixed plate is fixedly installed at the bottom of the inner wall of the dehumidifier cabinet, a sealing slide plate is fixedly installed on the surface of the sliding plate, a condenser is slidably installed on the inner wall of the dehumidifier cabinet, a first spring is provided between the partition and the sliding plate, and the sliding plate is reset by the elastic force of the first spring, and a second spring is provided between the dehumidifier cabinet and the condenser, and the condenser is reset by the elastic force of the second spring.

[0008] In some implementations, the dehumidifier cabinet is equipped with a drainage device and a dust-blocking device. The drainage device includes a sliding plate, a short plate, a sealing plate, and a drain pipe. The sliding plate is fixedly installed on the sealing sliding plate, the short plate is fixedly installed on the bottom of the sliding plate, the sealing plate is fixedly installed on the bottom of the short plate, and the drain pipe is connected to the bottom of the dehumidifier cabinet. When the sealing sliding plate moves towards the condenser, it causes the sliding plate to move towards the condenser. The movement of the sliding plate towards the condenser causes the short plate to move towards the condenser. The movement of the short plate towards the condenser causes the sealing plate to move towards the condenser. The movement of the sealing plate towards the condenser seals the drain pipe.

[0009] In some implementations, a connecting plate is fixedly mounted on the surface of the sliding plate, and a scraper is fixedly mounted on the surface of the connecting plate. At the same time, when the sealing plate moves away from the condenser, it will drive the connecting plate and the scraper to move away from the condenser. The scraper pushes down the undripping condensate by moving away from the condenser.

[0010] In some implementations, the sealing plate contacts the surface of the dehumidifier cabinet to seal the drain pipe, and the scraper contacts the surface of the condenser to scrape away and clean the water droplets remaining on the condenser.

[0011] In some implementations, the dust-blocking device includes a guide groove and a push rod. The guide groove is located at the bottom of the condenser, and the push rod is fixedly installed on the top of the scraper. The push rod is located on the inner wall of the guide groove. The push rod moves towards the condenser by moving the scraper towards the condenser. The movement of the push rod towards the condenser pushes the condenser to move back and forth along the guide groove.

[0012] In some implementations, an L-shaped rod is fixedly installed on the top of the slide plate, a rotating shaft is rotatably installed on the inner wall of the partition, and a rotating plate is fixedly installed on the circumferential surface of the rotating shaft. When the L-shaped rod moves towards the condenser, it pushes the rotating plate to rotate downward, and the downward rotation of the rotating plate will block the top of the condenser.

[0013] In some implementations, a torsion spring is provided between the partition and the rotating shaft, and the rotating shaft is reset by the elastic force of the torsion spring itself. The L-shaped rod is located on the left side of the rotating plate.

[0014] This invention provides an online monitoring device for greenhouse gas emission concentrations. It has the following beneficial effects: 1. This invention seals the right air inlet by moving the baffle upwards, allowing air to enter the dehumidifier cabinet through the lower air inlet. This prevents rainwater from entering the equipment through the air inlet pipe during rainy days, which would result in excessive moisture and affect the accuracy of the data. Moving the sliding plate away from the condenser seals the opening between the partitions, allowing air to enter from the right side of the dehumidifier cabinet. The condenser then condenses the moisture in the air into condensate, preventing a large amount of moisture in the air from entering the monitoring equipment during rainy days, which would result in a lower concentration detected by the monitoring equipment and affect the data results.

[0015] 2. This invention uses a downward-moving baffle to release the seal on the right-side air inlet, allowing air to enter through it. Simultaneously, the downward movement of the sealing disc moves the long rod and push plate downwards. The push plate, moving downwards along the inclined groove, pushes the guide plate and sliding plate towards the condenser. The sliding plate's movement towards the condenser opens the partition, allowing air to directly enter the monitoring device through the partition opening. The sealing slide plate and fixed plate seal the right side of the partition, preventing continuous airflow through the condenser on sunny days, which would cause a large amount of dust to accumulate on the condenser and affect subsequent dehumidification.

[0016] 3. This invention seals the drain pipe by moving the sealing plate closer to the condenser, preventing outside air from entering the dehumidifier cabinet on sunny days. This prevents severe dust accumulation on the condenser fins, which would affect the subsequent dehumidification effect. Conversely, on rainy days, the sealing plate moves away from the condenser, opening the drain pipe to drain water and prevent the accumulation of large amounts of condensate inside the dehumidifier cabinet. Failure to promptly remove moisture would affect the accuracy of data monitoring. The scraper moves away from the condenser to push down any remaining condensate, preventing moisture residue on the condenser from freezing in low-temperature environments. This prevents humid air from condensing, keeping humidity levels high and affecting monitoring results.

[0017] 4. This invention, through the back-and-forth movement of the guide groove, drives the condenser to move back and forth. The back-and-forth movement of the condenser dissipates the condensate on its surface, preventing water droplets from remaining on the condenser surface and affecting the dehumidification effect. At the same time, the downward rotation of the rotating plate blocks the top of the condenser, preventing dust in the air from entering the monitoring equipment through the partition on sunny days and falling onto the top of the condenser, causing dust accumulation and affecting the dehumidification effect on rainy days. On rainy days, the L-shaped rod resets, releasing its pressure on the rotating plate. Subsequently, the rotating shaft resets, driving the rotating plate to reset, and dehumidification is then carried out through the condenser, improving the protection effect of the condenser and extending its service life. Attached Figure Description

[0018] Figure 1 This is an overall schematic diagram illustrating an exemplary embodiment of the disclosed technology; Figure 2 This is a schematic cross-sectional view illustrating an exemplary embodiment of the disclosed technology; Figure 3 This is a schematic diagram illustrating the interior of a dehumidifier cabinet according to an exemplary embodiment of the disclosed technology; Figure 4 This is a schematic cross-sectional view of an intake manifold according to an exemplary embodiment of the disclosed technology; Figure 5 This is a schematic diagram illustrating a guide plate and push plate according to an exemplary embodiment of the disclosed technology; Figure 6 This is a schematic diagram illustrating a scraper and condenser according to an exemplary embodiment of the disclosed technology; Figure 7 This is a schematic diagram illustrating a guide groove and push rod according to an exemplary embodiment of the disclosed technology.

[0019] Figure label: 1. Monitoring cabinet; 2. Monitoring equipment; 3. Dehumidifier cabinet; 4. Air inlet pipe; 5. Fixing ring; 6. Electric telescopic rod; 7. Sealing round plate; 8. Baffle; 81. L-shaped plate; 9. Long rod; 10. Partition; 11. Sliding plate; 12. Guide plate; 13. Push plate; 14. Fixing plate; 15. Sealing slide plate; 16. Condenser; 171. Slide plate; 172. Short plate; 173. Sealing plate; 174. Drain pipe; 175. Connecting plate; 176. Scraper; 181. Guide groove; 182. Push rod; 183. L-shaped rod; 184. Rotating shaft; 185. Rotating plate. Detailed Implementation

[0020] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0021] Please see Figure 1 - Figure 5 One embodiment of the present invention includes: a monitoring cabinet 1, a monitoring device 2 disposed inside the monitoring cabinet 1, a dehumidifying cabinet 3 fixedly installed at the bottom of the monitoring device 2, an air inlet pipe 4 fixedly installed at the bottom of the dehumidifying cabinet 3, the air inlet pipe 4 having a lower air inlet and a right air inlet, a fixing ring 5 fixedly installed on the inner wall of the air inlet pipe 4, an electric telescopic rod 6 fixedly installed on the inner wall of the fixing ring 5, a sealing circular plate 7 fixedly installed at the output end of the electric telescopic rod 6, a baffle 8 fixedly installed on the right side of the output end of the electric telescopic rod 6, and an L-shaped plate 81 fixedly installed on the top of the sealing circular plate 7. A long rod 9 is fixedly installed on the top of the L-shaped plate 81 to prevent rainwater from entering the equipment through the air inlet pipe 4 on rainy days, which would cause excessive moisture and affect the accuracy of the data. A partition 10 is fixedly installed on the inner wall of the dehumidifier cabinet 3. A sliding plate 11 is slidably installed at the bottom of the partition 10. A guide plate 12 is fixedly installed at the bottom of the sliding plate 11. The surface of the guide plate 12 is provided with a slanted groove. A push plate 13 is fixedly installed on the top of the long rod 9 to prevent air from continuously passing through the condenser 16 on sunny days, which would cause a large amount of dust to accumulate on the condenser 16 and affect the subsequent dehumidification effect.

[0022] A fixed plate 14 is fixedly installed at the bottom of the inner wall of the dehumidifier cabinet 3, and a sealing slide plate 15 is fixedly installed on the surface of the sliding plate 11. A condenser 16 is slidably installed on the inner wall of the dehumidifier cabinet 3. A first spring is provided between the partition plate 10 and the sliding plate 11. The sliding plate 11 is reset by the elastic force of the first spring. A second spring is provided between the dehumidifier cabinet 3 and the condenser 16. The condenser 16 is reset by the elastic force of the second spring.

[0023] In this embodiment, during operation: On sunny days, outside air enters the intake pipe 4 through the right air inlet. The fixing ring 5 and the sealing disc 7 seal the lower air inlet, preventing air from entering. The air then enters the dehumidifier 3 and monitoring device 2 through the air intake pipe 4. The monitoring device 2 then monitors the carbon dioxide content in the air in real time. On rainy days, the electric telescopic rod 6 is activated. The output end of the electric telescopic rod 6 moves upward, which in turn moves the sealing disc 7 upward. The upward movement of the sealing disc 7 in turn moves the baffle 8 upward, sealing the right air inlet. Afterwards, air enters the dehumidifier cabinet 3 through the lower air inlet to prevent rainwater from entering the equipment through the air inlet pipe 4 during rainy days, which would cause excessive moisture and affect the accuracy of the data. The upward movement of the sealing circular plate 7 moves the L-shaped plate 81, the long rod 9, and the push plate 13 upwards. The upward movement of the push plate 13 pushes the guide plate 12 along the inclined groove away from the condenser 16. The movement of the guide plate 12 away from the condenser 16 moves the sliding plate 11 away from the condenser 16, sealing the opening between the partitions 10 and allowing air to pass through... The dehumidifier 3 enters from the right side, and the condenser 16 condenses the moisture in the air into condensate, preventing a large amount of moisture in the air from entering the monitoring device 2 on rainy days, which would cause the concentration detected by the monitoring device 2 to be lower than expected and affect the data results. At the same time, when the weather is sunny, the output end of the electric telescopic rod 6 will drive the sealing disc 7 and the baffle 8 to move downward. The baffle 8 moves downward and breaks the seal on the right air inlet, allowing air to enter through the right air inlet. At the same time, the downward movement of the sealing disc 7 will drive the long rod 9 and the push plate 13 to move downward. The push plate 13 moves downward along the inclined groove, which will push the guide plate 12 and the sliding plate 11 closer to the condenser. As the condenser 16 moves, the sliding plate 11 moves closer to the condenser 16, causing the partition 10 to open, allowing air to directly enter the monitoring device 2 through the opening of the partition 10. At the same time, the movement of the sliding plate 11 closer to the condenser 16 will also cause the sealing plate 15 to move closer to the condenser 16. The sealing plate 15 will then contact the fixed plate 14, sealing the right side of the partition 10 through the sealing plate 15 and the fixed plate 14. This prevents air from continuously passing through the condenser 16 on sunny days, which would cause a large amount of dust to accumulate on the condenser 16 and affect the subsequent dehumidification effect.

[0024] Please see Figure 1 - Figure 7Based on the above embodiments, in another embodiment of the present invention, the dehumidifier cabinet 3 is provided with a drainage device and a dust blocking device for drainage. The drainage device includes a slide plate 171, a short plate 172, a sealing plate 173, and a drain pipe 174. The slide plate 171 is fixedly installed on the sealing slide plate 15, the short plate 172 is fixedly installed on the bottom of the slide plate 171, the sealing plate 173 is fixedly installed on the bottom of the short plate 172, and the drain pipe 174 is connected to the bottom of the dehumidifier cabinet 3 to prevent outside air from entering the dehumidifier cabinet 3 through the drain pipe 174 on sunny days, which would cause serious dust accumulation on the fins of the condenser 16 and affect the subsequent dehumidification effect.

[0025] A connecting plate 175 is fixedly installed on the surface of the slide plate 171, and a scraper 176 is fixedly installed on the surface of the connecting plate 175 to prevent water vapor from remaining on the condenser 16. In low-temperature environments, water vapor is prone to freezing, which prevents the humid air from condensing and causing the moisture in the air to be unable to be discharged, resulting in persistently high humidity and affecting the monitoring results.

[0026] The sealing plate 173 contacts the surface of the dehumidifier 3 and seals the drain pipe 174. The scraper 176 contacts the surface of the condenser 16 and scrapes away the water droplets remaining on the condenser 16.

[0027] In this embodiment, during operation: the sealing slide plate 15 moves towards the condenser 16, causing the slide plate 171 to move towards the condenser 16. The movement of the slide plate 171 towards the condenser 16 causes the short plate 172 to move towards the condenser 16. The movement of the short plate 172 towards the condenser 16 causes the sealing plate 173 to move towards the condenser 16. The sealing plate 173's movement towards the condenser 16 seals the drain pipe 174, preventing outside air from entering the dehumidifier 3 through the drain pipe 174 on sunny days, which would cause severe dust accumulation on the condenser 16 fins and affect subsequent dehumidification. Additionally, during rainy days... The sealing plate 173 will move away from the condenser 16, causing the drain pipe 174 to open and drain water. This prevents a large amount of condensate from accumulating inside the dehumidifier 3, as failure to remove moisture in time will affect the accuracy of data monitoring. At the same time, when the sealing plate 173 moves away from the condenser 16, it will also drive the connecting plate 175 and the scraper 176 to move away from the condenser 16. The scraper 176 will push down any undripping condensate, preventing water vapor from remaining on the condenser 16. In low-temperature environments, water vapor is prone to freezing, which prevents the humid air from condensing and causing the moisture in the air to remain high, thus affecting the monitoring results.

[0028] The dust-blocking device includes a guide groove 181 and a push rod 182. The guide groove 181 is located at the bottom of the condenser 16, and the push rod 182 is fixedly installed on the top of the scraper 176. The push rod 182 is located on the inner wall of the guide groove 181. The back-and-forth movement of the guide groove 181 will cause the condenser 16 to move back and forth. The back-and-forth movement of the condenser 16 will shake down the condensed water on the surface to prevent water droplets from remaining on the surface of the condenser 16 and affecting the dehumidification effect.

[0029] An L-shaped rod 183 is fixedly installed on the top of the slide plate 171. A rotating shaft 184 is rotatably installed on the inner wall of the partition 10. A rotating plate 185 is fixedly installed on the circumference of the rotating shaft 184. This prevents dust in the air from falling onto the condenser 16 when it enters the monitoring device 2 through the partition 10 during sunny weather, causing the condenser 16 to be covered with dust and affecting the dehumidification effect during rainy weather. When it rains, the L-shaped rod 183 will reset and release its pressure on the rotating plate 185. Then, the rotating shaft 184 will reset and drive the rotating plate 185 to reset. Dehumidification will then be carried out through the condenser 16, improving the protection effect of the condenser 16 and extending its service life.

[0030] A torsion spring is provided between the partition 10 and the rotating shaft 184. The rotating shaft 184 is reset by the elastic force of the torsion spring itself. The L-shaped rod 183 is located on the left side of the rotating plate 185.

[0031] In this embodiment, the scraper 176 moves towards the condenser 16, causing the push rod 182 to move towards the condenser 16. The push rod 182's movement towards the condenser 16 pushes the condenser 16 back and forth along the guide groove 181. This back-and-forth movement of the guide groove 181 causes the condenser 16 to move back and forth, dislodging any condensed water droplets on its surface to prevent water droplets from remaining and affecting dehumidification. Simultaneously, when the slide plate 171 moves towards the condenser 16, it causes the L-shaped rod 183 to move towards the condenser 16. Moving L3 towards the condenser 16 will push the rotating plate 185 downwards. The downward rotation of the rotating plate 185 will block the top of the condenser 16, preventing dust in the air from entering the monitoring device 2 through the partition 10 when air is intake on sunny days. This would prevent dust from falling onto the top of the condenser 16, causing it to accumulate dust and affecting the dehumidification effect on rainy days. When it rains, the L-shaped rod 183 will reset and release the pressure on the rotating plate 185. Subsequently, the rotating shaft 184 will reset, driving the rotating plate 185 to reset as well. Dehumidification will then proceed through the condenser 16, improving the protection of the condenser 16 and extending its service life.

[0032] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and application concept of this application, should be included within the scope of protection of this application.

Claims

1. An online monitoring device for greenhouse gas emission concentrations, comprising: Monitoring cabinet (1), wherein monitoring equipment (2) is installed inside the monitoring cabinet (1), characterized in that: The monitoring device (2) is fixedly installed with a dehumidifier cabinet (3) at the bottom. The dehumidifier cabinet (3) is fixedly installed with an air inlet pipe (4) at the bottom. The air inlet pipe (4) is provided with a lower air inlet and a right air inlet. A fixing ring (5) is fixedly installed on the inner wall of the air inlet pipe (4). An electric telescopic rod (6) is fixedly installed on the inner wall of the fixing ring (5). A sealing round plate (7) is fixedly installed at the output end of the electric telescopic rod (6). A baffle (8) is fixedly installed on the right side of the output end of the electric telescopic rod (6). An L-shaped plate (81) is fixedly installed on the top of the sealing round plate (7). A long rod (9) is fixedly installed on the top of the L-shaped plate (81). A partition (10) is fixedly installed on the inner wall of the dehumidifier cabinet (3). A sliding plate (11) is slidably installed at the bottom of the partition (10). A guide plate (12) is fixedly installed at the bottom of the sliding plate (11). An inclined groove is opened on the surface of the guide plate (12). A push plate (13) is fixedly installed on the top of the long rod (9).

2. The online monitoring device for greenhouse gas emission concentration according to claim 1, characterized in that, A fixed plate (14) is fixedly installed on the bottom of the inner wall of the dehumidifier (3), a sealing plate (15) is fixedly installed on the surface of the sliding plate (11), a condenser (16) is slidably installed on the inner wall of the dehumidifier (3), a first spring is provided between the partition (10) and the sliding plate (11), a second spring is provided between the dehumidifier (3) and the condenser (16), and a drainage device and a dust blocking device are provided inside the dehumidifier (3).

3. The online monitoring device for greenhouse gas emission concentration according to claim 2, characterized in that, The drainage device includes a slide plate (171), a short plate (172), a sealing plate (173), and a drain pipe (174). The slide plate (171) is fixedly installed on the sealing slide plate (15), the short plate (172) is fixedly installed on the bottom of the slide plate (171), the sealing plate (173) is fixedly installed on the bottom of the short plate (172), and the drain pipe (174) is connected to the bottom of the dehumidifier cabinet (3).

4. The online monitoring device for greenhouse gas emission concentration according to claim 3, characterized in that, A connecting plate (175) is fixedly installed on the surface of the sliding plate (171), and a scraper (176) is fixedly installed on the surface of the connecting plate (175).

5. The online monitoring device for greenhouse gas emission concentration according to claim 4, characterized in that, The sealing plate (173) is in contact with the surface of the dehumidifier (3), and the scraper (176) is in contact with the surface of the condenser (16).

6. The online monitoring device for greenhouse gas emission concentration according to claim 5, characterized in that, The dust-blocking device includes a guide groove (181) and a push rod (182). The guide groove (181) is opened at the bottom of the condenser (16), and the push rod (182) is fixedly installed on the top of the scraper (176). The push rod (182) is set on the inner wall of the guide groove (181).

7. The online monitoring device for greenhouse gas emission concentration according to claim 6, characterized in that, An L-shaped rod (183) is fixedly installed on the top of the slide plate (171), and a rotating shaft (184) is rotatably installed on the inner wall of the partition (10). A rotating plate (185) is fixedly installed on the circumferential surface of the rotating shaft (184).

8. The online monitoring device for greenhouse gas emission concentration according to claim 7, characterized in that, A torsion spring is provided between the partition (10) and the rotating shaft (184), and the L-shaped rod (183) is located on the left side of the rotating plate (185).

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