Carbon dioxide emission key source automatic monitoring device

Abstract

The invention belongs to the technical field of carbon dioxide emission monitoring, and particularly relates to an automatic monitoring device for key sources of carbon dioxide emission. Comprising a box body, a detection channel arranged in the box body, a detection unit arranged in the detection channel and used for detecting carbon dioxide in tail gas, and sealing door plates arranged at an inlet and an outlet of the detection channel in a sliding mode respectively. Sampling monitoring and sealing protection are carried out on tail gas discharged by a thermal power plant, the service life of the detection unit is prolonged, the cleaning frequency of the detection unit is reduced, a tail gas sample in a detection channel is located in a relatively stable environment, and the detection unit can more accurately measure data; the opening duration of the inlet of the detection channel is related to the exhaust emission speed, so that the function of automatically adjusting the sample amount can be realized, and the problem that the accuracy of a monitoring result is influenced by the fact that the sampling amount is greatly influenced by the exhaust flow speed in the existing timing sampling method is solved.

Description

Technical Field

[0001] The invention belongs to the field of carbon dioxide emission monitoring, in particular to an automatic monitoring device for key sources of carbon dioxide emission. Background Art

[0002] Thermal power plants, coal plants and waste treatment plants will produce a large amount of greenhouse gases such as carbon dioxide during their operation. For the requirements of sustainable development and environmental protection, key industries such as thermal power, coal mining and waste treatment need to strictly control carbon dioxide emissions. Measures taken include conducting pilot greenhouse gas monitoring, strengthening monitoring quality control, deepening the analysis of differences in monitoring and accounting data, and improving relevant monitoring and accounting technical methods. The carbon dioxide emission monitoring devices used have become the key research content of industries related to ecological environment monitoring.

[0003] A patent document with publication number CN118330136A discloses an online monitoring device for carbon dioxide emission concentration, including a reaction system and a stirring device. The reaction system includes a reaction tank. A flue gas inlet and a flue gas outlet are arranged on the top of the reaction tank. The stirring device is located in the reaction tank. A flue gas hole is arranged on the stirring device. A carbon dioxide monitoring device is arranged in the reaction tank. The flue gas is sent into the liquid in the reaction tank through the flue gas hole. The measurement accuracy is high and the volume is small.

[0004] There are still some problems in the use of the above scheme. When monitoring carbon dioxide in tail gas emitted from key industrial sites such as thermal power plants, the tail gas has high fluidity and complex composition. The carbon dioxide sensor used is exposed to the outside for a long time, which will not only increase the loss of the carbon dioxide sensor, but also the impurities in the tail gas adhere to the sensor, which will also affect the accuracy of the monitoring results. The above technical solution does not effectively solve this problem.

[0005] To this end, the present invention provides an automatic monitoring device for key sources of carbon dioxide emissions. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is: the automatic monitoring device for key sources of carbon dioxide emissions described in the present invention includes a box body, and also includes: a detection channel arranged inside the box body, the interior of the detection channel is used to collect exhaust gas samples; a detection unit arranged in the detection channel for detecting carbon dioxide in the exhaust gas; and sealing door panels slidably arranged at the inlet and outlet of the detection channel, respectively, the sealing door panels include a front door panel and a rear door panel, and the front door panel and the rear door panel seal the detection channel after moving down.

[0008] Preferably, it also includes an opening and closing mechanism for controlling the lifting and lowering of the sealing door panel, the opening and closing mechanism including: a closing spring for pushing the sealing door panel downward; a pressure plate arranged on the sealing door panel, the pressure plate including a front transverse plate and a rear transverse plate, the front transverse plate is slidably arranged on the front door panel, and the rear transverse plate is fixedly connected to the rear door panel; a first turntable and a second turntable arranged inside the box body are rotated; a toggle member respectively arranged on the first turntable and the second turntable, the toggle member including a front toggle plate and a rear toggle plate respectively arranged on the first turntable and the second turntable, after the first turntable and the second turntable rotate, the sealing door panel is driven to move up through the cooperation of the toggle member and the pressure plate.

[0009] Preferably, a control mechanism is also included, which includes: a pushing spring for pushing the front cross plate away from the toggle member; a timing spring assembly arranged on the front door panel, a ratchet is provided on the input shaft of the timing spring assembly, an arc plate is provided on the output shaft of the timing spring assembly, a slope is provided on the end of the arc plate, after the output shaft rotates, the front cross plate is pushed close to the front toggle plate through the arc plate; a pawl group is arranged inside the box body, after the front door panel moves up, the ratchet is meshed and connected with the pawl group and rotates in one direction.

[0010] Preferably, after the front door panel moves down to seal the detection channel, the pawl group is located above the ratchet, the pawl group and the ratchet are staggered up and down, the first turntable and the second turntable are meshed and connected, and the front paddle plate and the rear paddle plate are staggered.

[0011] Preferably, it also includes a cleaning mechanism for cleaning the detection unit, and the cleaning mechanism includes: a sealing box fixedly connected to the inside of the detection channel; a movable shaft movably arranged inside the sealing box; a plurality of slides slidably arranged on the circumference of the movable shaft; a cleaning cloth provided on the slide, and the cleaning cloth is located between the movable shaft and the detection unit.

[0012] Preferably, the cleaning mechanism also includes: two sealing plates slidably arranged on the sealing box; a sealing spring arranged on the sealing plate, the two sealing plates are closed under the push of the sealing spring, and the cleaning cloth is located inside the enclosed space formed by the sealing plate and the sealing seat.

[0013] Preferably, the inner side wall of the sealing plate is provided with a slope, and the cleaning mechanism further comprises a round rod provided at the end of the slide plate, and after the movable shaft rotates, the slide plate moves outward and pushes the two sealing plates away from each other through the round rod.

[0014] Preferably, it also includes a driving mechanism, which includes: a rotating shaft rotatably arranged on the housing; an impeller fixedly connected to the rotating shaft, the impeller being located on the outside of the housing; a sleeve slidably arranged on the rotating shaft, the sleeve being located inside the housing, the sleeve, the rotating shaft and the movable shaft being coaxial, and an assembly groove being provided on the side of the sleeve close to the sleeve; a push plate slidably arranged inside the housing, the push plate being clamped with the sleeve, and the push plate drives the sleeve to move after movement; a magnetic block fixedly connected to the push plate; an electromagnet arranged inside the housing, the electromagnet repelling the magnetic block and pushing the push plate to move after being energized, so that the movable shaft is inserted into the assembly groove.

[0015] Preferably, the driving mechanism further comprises: a driven gear fixedly connected to the first rotating disk; and a driving gear fixedly connected to the sleeve, wherein the driving gear is meshed with the driven gear for transmission.

[0016] Preferably, the driving mechanism also includes: a baffle plate slidably arranged in the box body, a block for blocking the push plate is provided at the end of the baffle plate, and the block is a one-way rotating structure; a return spring for pushing the baffle plate to block in front of the push plate; a bevel plate rotatably arranged on the sealing door panel, the bevel plate is inclined, and the bevel plate is a one-way rotating structure, and after the sealing door panel moves downward, the baffle plate is driven away from the push plate by the bevel plate.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. The automatic monitoring device for key sources of carbon dioxide emissions described in the present invention realizes the function of sampling and monitoring the exhaust gas emitted by thermal power plants by setting the front door panel and the rear door panel to open and close, and the detection unit is sealed and protected when not monitoring, thereby increasing the service life of the detection unit and reducing the frequency of cleaning the detection unit. The exhaust gas samples in the detection channel are in a relatively stable environment, the working environment of the detection unit is more stable, and the data can be measured more accurately; the opening time of the inlet of the detection channel is related to the emission rate of the exhaust gas, so that the function of automatically adjusting the sample amount can be realized, which improves the problem that the prior art generally adopts a timed long sampling method, and the sampling amount fluctuates too much due to the influence of the exhaust gas flow rate, thereby affecting the accuracy of the monitoring results.

[0019] 2. The automatic monitoring device for key sources of carbon dioxide emissions described in the present invention can ensure the length of time that the exhaust gas sample stays in the detection channel by setting a timing spring assembly to cooperate with the impeller and the turntable, thereby ensuring that the detection work proceeds smoothly. Such a cycle can realize the function of automatic cyclic sampling; the exhaust gas emitted by thermal power plants is generally at a high temperature. When an electrical system is used, not only the cost of use is increased, but the electrical system is also prone to failure when it is in a high temperature environment for a long time. The device does not need to be additionally equipped with an electrical system for controlling the sealing door panel, and is more convenient and reliable to use, and has better adaptability to the high-temperature exhaust gas emission environment.

[0020] 3. The automatic monitoring device for key sources of carbon dioxide emissions described in the present invention utilizes the power changes of the detection unit and the electromagnet when they are working and not working to realize the functions of automatic cleaning of the detection unit and sealing and protecting the cleaning cloth when not cleaning, thereby extending the use time of the cleaning cloth and ensuring the detection effect of the detection unit. It can also automatically cycle work, has a high degree of automation, and is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 is a front view of the first embodiment of the present invention;

[0023] Figure 2 It is the front view of the internal structure of the box;

[0024] Figure 3 It is the back view of the internal structure of the box;

[0025] Figure 4 It is an exploded view of the turntable, sealing door panel and detection unit;

[0026] Figure 5 It is an exploded view of the cleaning mechanism and the driving mechanism;

[0027] Figure 6 It is an exploded view of the rotating shaft, sleeve and movable shaft;

[0028] Figure 7 This is a back view of the timing spring assembly and pawl group;

[0029] Figure 8 It is an exploded view of the sleeve, baffle, push plate and electromagnet;

[0030] Fig. 9 It is a schematic diagram of the rear door panel and baffle;

[0031] Fig.10 This is a diagram of the rear door panel.

[0032] In the figure: 1, box; 2, detection channel; 3, detection unit; 4, sealing door plate; 41, front door plate; 42, rear door plate; 5, opening and closing mechanism; 51, closing spring; 52, front horizontal plate; 53, rear horizontal plate; 54, first turntable; 541, driven gear; 55, second turntable; 56, front paddle; 57, rear paddle; 6, control mechanism; 61, push spring; 62, timing spring assembly; 621, ratchet; 622, arc shaped plate; 63, pawl group; 7, cleaning mechanism; 71, sealing box; 72, movable shaft; 73, slide plate; 74, cleaning cloth; 75, sealing plate; 76, sealing spring; 77, round rod; 8, driving mechanism; 81, rotating shaft; 82, impeller; 83, sleeve; 831, assembly groove; 832, driving gear; 84, push plate; 841, magnetic block; 85, electromagnet; 86, baffle; 87, reset spring; 88, bevel plate. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0034] Embodiment 1

[0035] like Figure 1-Figure 4 As shown, an automatic monitoring device for key sources of carbon dioxide emissions according to an embodiment of the present invention includes a box body 1, and also includes: a detection channel 2 arranged inside the box body 1, the interior of the detection channel 2 is used to collect exhaust gas samples; a detection unit 3 arranged in the detection channel 2 for detecting carbon dioxide in the exhaust gas; and sealing door panels 4 that are slidably arranged at the inlet and outlet of the detection channel 2, respectively, the sealing door panels 4 include a front door panel 41 and a rear door panel 42, and the front door panel 41 and the rear door panel 42 are moved down to seal the detection channel 2.

[0036] Specifically, the detection channel 2 is through-through from left to right, the detection unit 3 adopts a carbon dioxide sensor for detecting parameters such as the carbon dioxide concentration in the exhaust gas, and the sealing door panel 4 can move up and down; when intermittent sampling and detection of carbon dioxide emitted from thermal power plants and other places is performed, the box 1 is installed at the exhaust gas outlet of thermal power plants and other places, and the detection unit 3 is connected to an external power supply. The direction of the detection channel 2 is consistent with the exhaust gas emission direction, and the inlet of the detection channel 2 faces the flow direction of the exhaust gas. The flow direction of the exhaust gas is as follows: Figure 1 As indicated by the arrow in;

[0037] In the initial state, the front door plate 41 and the rear door plate 42 respectively seal the inlet and outlet of the detection channel 2, thereby sealing and protecting the detection unit 3 in the detection channel 2, improving the problem that when the carbon dioxide sensor is always exposed to the outside, impurities in the exhaust gas will adhere to the carbon dioxide sensor too much, thereby affecting the detection result; when the exhaust gas is monitored for carbon dioxide, the front door plate 41 is first opened to allow the exhaust gas emitted by the thermal power plant to enter the detection channel 2, and then the front door plate 41 is closed. At this time, the exhaust gas sample in the detection channel 2 is in a relatively stable environment, and the carbon dioxide sensor can measure data more accurately. Then, the rear door plate 42 is opened, and after the exhaust gas sample in the detection channel 2 is automatically discharged, the rear door plate 42 is closed again, so that the detection channel 2 returns to the initial state. Through this setting, the function of sampling and monitoring the exhaust gas emitted by the thermal power plant is realized, and when not monitoring, the detection unit 3 is sealed and protected, thereby improving the accuracy of the monitoring result and reducing the cleaning frequency of the detection unit 3, and the use effect is better.

[0038] like Figure 2-Figure 4 As shown, it also includes an opening and closing mechanism 5 for controlling the lifting and lowering of the sealing door panel 4, and the opening and closing mechanism 5 includes: a closing spring 51 for pushing the sealing door panel 4 to move downward; a pressure plate arranged on the sealing door panel 4, the pressure plate includes a front transverse plate 52 and a rear transverse plate 53, the front transverse plate 52 is slidably arranged on the front door panel 41, and the rear transverse plate 53 is fixedly connected to the rear door panel 42; a first turntable 54 and a second turntable 55 rotatably arranged inside the box body 1; a toggle member respectively arranged on the first turntable 54 and the second turntable 55, the toggle member includes a front toggle plate 56 and a rear toggle plate 57 respectively arranged on the first turntable 54 and the second turntable 55, after the first turntable 54 and the second turntable 55 rotate, the sealing door panel 4 is driven to move upward through the cooperation of the toggle member and the pressure plate.

[0039] Specifically, the two ends of the closing spring 51 are connected to the box body 1 and the sealing door panel 4 respectively. During the rotation of the first turntable 54, the front dial plate 56 contacts the front horizontal plate 52 and drives the front door panel 41 to move upward. During the rotation of the second turntable 55, the rear dial plate 57 contacts the rear horizontal plate 53 and drives the rear door panel 42 to move upward. After the toggle member is separated from the pressure plate, the sealing door panel 4 automatically falls and resets under the push of the closing spring 51, blocking the two ends of the detection channel 2. It should be noted that the toggle member and the turntable can be fixedly connected, or the toggle member can be connected by sliding within a certain range outside the turntable. The end of the rear dial plate 57 is in an arc shape, and the shape and size of the rear dial plate 57 can be selected according to the specific situation, so as to adjust the contact time between the rear dial plate 57 and the rear horizontal plate 53, and then adjust the opening time of the rear door panel 42.

[0040] like Figure 2-Figure 7As shown, it also includes a control mechanism 6, which includes: a push spring 61 for pushing the front cross plate 52 away from the toggle member; a timing spring assembly 62 arranged on the front door panel 41, a ratchet 621 is provided on the input shaft of the timing spring assembly 62, and an arc plate 622 is provided on the output shaft of the timing spring assembly 62, and a slope is provided on the end of the arc plate 622. After the output shaft rotates, the front cross plate 52 is pushed close to the front toggle plate 56 through the arc plate 622; a pawl group 63 is arranged inside the box body 1, and after the front door panel 41 moves up, the ratchet 621 is meshed and connected with the pawl group 63 and rotates in one direction.

[0041] Specifically, the timing spring assembly 62 is a timing structure. After the spring is tightened, it is released. The energy of the spring is completely released after a fixed time. The length direction of the detection channel 2 and the flow direction of the airflow are left and right. Figure 1 and Figure 2 In the figure, the exhaust gas flows from right to left. Figure 2 In the embodiment, the axis direction of the impeller 82 is the front-to-back direction. In the monitoring device, the movement of each structure toward the impeller 82 is forward movement, and the movement in the opposite direction is backward movement.

[0042] The two ends of the push spring 61 are connected to the front door plate 41 and the front transverse plate 52 respectively. Initially, under the push of the push spring 61, the front transverse plate 52 and the front shift plate 56 are staggered front and back. Figure 3 For example, initially, the front transverse plate 52 is located in front of the front paddle plate 56. At this time, after the first turntable 54 rotates, the front paddle plate 56 does not contact the front transverse plate 52. During the rotation of the output shaft of the timing spring assembly 62, the arc plate 622 contacts the front transverse plate 52 and drives the front transverse plate 52 to move and be located in the same vertical plane with the front paddle plate 56, so that after the first turntable 54 rotates, the front paddle plate 56 can contact the front transverse plate 52.

[0043] like Figure 2-Figure 7 As shown, after the front door panel 41 moves down to seal the detection channel 2, the pawl group 63 is located above the ratchet 621, the pawl group 63 and the ratchet 621 are staggered up and down, the first turntable 54 and the second turntable 55 are meshed and connected, and the front shift plate 56 and the rear shift plate 57 are staggered.

[0044] Specifically, the pawl group 63 can prevent the ratchet 621 from rotating. When the ratchet 621 contacts the pawl group 63, a unidirectional rotating gear mechanism is formed. The front paddle plate 56 and the rear paddle plate 57 are staggered front and back. During the simultaneous rotation of the first turntable 54 and the second turntable 55, the front paddle plate 56 and the rear paddle plate 57 do not interfere with each other. After moving to the top, the front door panel 41 moves downward. During the downward movement of the front door panel 41, the ratchet 621 rotates unidirectionally when in contact with the pawl group 63, thereby tightening the timing spring assembly 62. After the front door panel 41 continues to move downward, the ratchet 621 and the pawl group 63 are staggered up and down, and the restraint of the pawl group 63 is lost. The timing spring assembly 62 begins to release energy and drives the output shaft and the arc plate 622 to rotate.

[0045] like Figure 3-Figure 5 As shown, it also includes a cleaning mechanism 7 for cleaning the detection unit 3, and the cleaning mechanism 7 includes: a sealing box 71 fixedly connected to the inside of the detection channel 2; a movable shaft 72 movably arranged inside the sealing box 71; a plurality of slides 73 slidably arranged on the side of the movable shaft 72; a cleaning cloth 74 arranged on the slide 73, and the cleaning cloth 74 is located between the movable shaft 72 and the detection unit 3.

[0046] Specifically, the movable shaft 72 can rotate and move forward and backward in the sealing box 71, and the cleaning cloth 74 is preferably but not limited to being arranged on one of the slides 73; initially, the cleaning cloth 74 is located in front of the detection unit 3 and the two are not in contact, so as not to affect the normal operation of the detection unit 3; after the detection unit 3 has been working for a period of time, due to contact with the exhaust gas, impurities may be attached to the surface of the sensor probe of the detection unit 3. In order to ensure the monitoring effect of the detection unit 3, the detection unit 3 needs to be cleaned. At this time, the movable shaft 72 is started to rotate and move backward, so that the cleaning cloth 74 is in contact with the detection unit 3, and the detection unit 3 is wiped and cleaned by the rotating cleaning cloth 74, so as to improve the cleanliness of the detection unit 3 and thus improve the monitoring effect.

[0047] like Figure 3-Figure 5 As shown, the cleaning mechanism 7 also includes: two sealing plates 75 slidably arranged on the sealing box 71; a sealing spring 76 arranged on the sealing plate 75, the two sealing plates 75 are closed under the push of the sealing spring 76, and the cleaning cloth 74 is located inside the enclosed space formed by the sealing plate 75 and the sealing seat.

[0048] Specifically, the two ends of the sealing spring 76 are respectively connected to the sealing plate 75 and the sealing seat. In the initial state, the two sealing plates 75 are closed together and cover the outside of the cleaning cloth 74 to seal and protect the cleaning cloth 74, thereby improving the problem of the cleaning cloth 74 being contaminated due to the contact between the exhaust gas and the cleaning cloth 74, improving the cleanliness of the cleaning cloth 74 itself, and extending the service life of the cleaning cloth 74.

[0049] like Figure 3-Figure 5As shown, the inner wall of the sealing plate 75 is provided with a slope, and the cleaning mechanism 7 also includes a round rod 77 arranged at the end of the slide plate 73. After the movable shaft 72 rotates, the slide plate 73 moves outward and pushes the two sealing plates 75 away from each other through the round rod 77.

[0050] Specifically, initially, the two sealing plates 75 are pushed towards each other by the sealing spring 76, and the inner wall of the sealing plate 75 is against the round rod 77; when cleaning the detection unit 3, the movable shaft 72 is started to rotate and move backward, and the slide plate 73 and the round rod 77 slide outward under the action of centrifugal force, thereby pushing the two sealing plates 75 away from each other, and then, as the movable shaft 72 continues to move backward, the cleaning cloth 74 moves to the outside of the sealing plate 75 and contacts the detection unit 3. During the cleaning process, the round rod 77 can prevent the two sealing plates 75 from closing, thereby ensuring normal contact between the cleaning cloth 74 and the detection unit 3.

[0051] Embodiment 2

[0052] like Figure 1-Figure 9 As shown, compared with Example 1, another embodiment of the present invention is: it also includes a driving mechanism 8, the driving mechanism 8 includes: a rotating shaft 81 rotatably arranged on the housing 1; an impeller 82 fixedly connected to the rotating shaft 81, the impeller 82 is located on the outside of the housing 1; a sleeve 83 slidably arranged on the rotating shaft 81, the sleeve 83 is located inside the housing 1, the sleeve 83, the rotating shaft 81 and the movable shaft 72 are coaxial, and a mounting groove 831 is provided on the side of the sleeve 83 close to the sleeve 83; a push plate 84 slidably arranged inside the housing 1, the push plate 84 is engaged with the sleeve 83, and the push plate 84 drives the sleeve 83 to move after moving; a magnetic block 841 fixedly connected to the push plate 84; an electromagnet 85 arranged inside the housing 1, after the electromagnet 85 is energized, it repels the magnetic block 841 and pushes the push plate 84 to move, so that the movable shaft 72 is inserted into the mounting groove 831.

[0053] Specifically, the movable shaft 72 and the assembly groove 831 are preferably but not limited to friction fit. After the movable shaft 72 is inserted into the assembly groove 831, the rotating sleeve 83 can drive the movable shaft 72 to rotate together. The impeller 82 is arranged on the outside of the box body 1 and is always in contact with the exhaust gas. The exhaust gas discharged from the thermal power plant drives the impeller 82 and the rotating shaft 81 to rotate during the flow process. The sleeve 83 is driven to rotate during the rotation of the rotating shaft 81. When sampling and testing the exhaust gas, the detection unit 3 and the electromagnet 85 are powered on. After the electromagnet 85 is powered on, it repels the magnetic block 841 with the same polarity, thereby pushing the push plate 84 to move. The push plate 84 drives the sleeve 83 to move along the axial centerline direction of the rotating shaft 81, so that the assembly groove 831 is sleeved on the outside of the movable shaft 72.

[0054] like Figure 3-Figure 4As shown, the driving mechanism 8 further includes: a driven gear 541 fixedly connected to the first rotating disk 54 ; and a driving gear 832 fixedly connected to the sleeve 83 , wherein the driving gear 832 is meshed with the driven gear 541 for transmission.

[0055] Specifically, initially, the electromagnet 85 is not energized and is attracted to the magnetic block 841, and the sleeve 83 is located in front of its moving range. At this time, the driving gear 832 is in contact and meshing with the driven gear 541, and the rotating sleeve 83 drives the first rotating disk 54 to rotate, and the first rotating disk 54 drives the second rotating disk 55 to rotate. After the first rotating disk 54 and the second rotating disk 55 rotate, they drive the front door panel 41 and the rear door panel 42 to open and close, thereby performing the exhaust gas sampling and discharge work;

[0056] When sampling and testing the exhaust gas, the detection unit 3 and the electromagnet 85 are powered on. After the electromagnet 85 is powered on, it repels the magnetic block 841 with the same polarity, thereby pushing the push plate 84 to move. The push plate 84 drives the sleeve 83 to move. After the sleeve 83 moves, the active gear 832 and the driven gear 541 are staggered front and back and the movable shaft 72 is inserted into the assembly groove 831. At this time, the first turntable 54 and the second turntable 55 stop rotating. After the sleeve 83 moves, it pushes the movable shaft 72 to move, so that the movable shaft 72 moves to the outside of the sealing plate 75 and contacts with the detection unit 3, and the detection unit 3 is wiped and cleaned.

[0057] like Figure 3-Figure 10 As shown, the driving mechanism 8 also includes: a baffle 86 slidably arranged in the box body 1, and a block is provided at the end of the baffle 86 for blocking the push plate 84, and the block is a one-way rotating structure; a return spring 87 for pushing the baffle 86 to block in front of the push plate 84; a bevel plate 88 rotatably arranged on the sealing door panel 4, the bevel plate 88 is inclined, and the bevel plate 88 is a one-way rotating structure. After the sealing door panel 4 moves down, the baffle 86 is driven away from the push plate 84 through the bevel plate 88.

[0058] Specifically, the two ends of the return spring 87 are respectively connected to the baffle 86 and the box body 1. Initially, the baffle 86 blocks the rear of the push plate 84 to prevent the push plate 84 from moving backward, so that the driving gear 832 is always in contact with the driven gear 541, and the bevel plate 88 is located below the baffle 86; after the door panel moves from top to bottom, the bevel plate 88 contacts the baffle 86 and pushes the baffle 86 away from the push plate 84, and then the push plate 84 can move backward.

[0059] Working principle: When intermittent sampling and testing of carbon dioxide emitted from thermal power plants and other places is performed, the box 1 is installed at the exhaust gas outlet of thermal power plants and other places, and the detection unit 3 is connected to the external power supply. In the initial state, the front door plate 41 and the rear door plate 42 respectively seal the inlet and outlet of the detection channel 2;

[0060] When used for the first time, first tighten the timing spring assembly 62 to store full energy. After loosening the timing spring assembly 62, the output shaft in the timing spring assembly 62 rotates, and the arc plate 622 contacts the front transverse plate 52, driving the front transverse plate 52 to move to the same vertical plane as the front shift plate 56. The flowing exhaust gas drives the impeller 82 to rotate, and the impeller 82 drives the rotating shaft 81 and the sleeve 83 to rotate. The driving gear 832 and the driven gear 541 on the sleeve 83 rotate, thereby driving the first turntable 54 and the second turntable 55 to rotate. During the rotation of the first turntable 54 and the second turntable 55, the front shift plate 56 first contacts the front transverse plate 52, driving the front door plate 41 to move upward, so that the inlet of the detection channel 2 is opened, and the exhaust gas discharged from the thermal power plant enters the detection channel 2. The front shift plate 56 is in contact with the front transverse plate 52, driving the front door plate 41 to move upward, so that the inlet of the detection channel 2 is opened, and the exhaust gas discharged from the thermal power plant enters the detection channel 2. After the plate 56 is separated from the front transverse plate 52, the front door plate 41 moves down and closes. At this time, the exhaust gas sample in the detection channel 2 is in a relatively stable environment, and the carbon dioxide sensor can measure data more accurately. The opening time of the inlet of the detection channel 2 is related to the exhaust gas emission speed. The faster the exhaust gas flow rate, the shorter the contact time between the front lever and the front transverse plate 52, and the shorter the opening time of the inlet of the detection channel 2, so that the function of automatically adjusting the sample amount can be realized. The prior art generally adopts a method of regular and timed long sampling. When the exhaust gas flow rate is too fast or too slow, the sample taken is also prone to be too much or too little, which further affects the accuracy of the monitoring result. The scheme realizes the function of automatically adjusting the sampling time according to the exhaust gas flow rate, which effectively improves this problem.

[0061] Then, as the second rotating disk 55 rotates, the rear paddle 57 contacts the rear transverse plate 53, driving the rear door plate 42 to move upward and open, so that the exhaust gas sample in the detection channel 2 is automatically discharged. Then, the rear paddle 57 separates from the rear transverse plate 53, the rear door plate 42 moves downward and closes, and the detection channel 2 returns to its initial state.

[0062] During this process, the front door panel 41 moves from top to bottom, the ratchet 621 contacts the pawl group 63 and rotates unidirectionally, tightening the timing spring assembly 62. After the front door panel 41 moves down to the bottom and is closed, the ratchet 621 and the pawl group 63 are staggered up and down, and the restraint of the pawl group 63 is lost. The timing spring assembly 62 begins to release energy and drives the output shaft and the arc plate 622 to rotate. The energy of the spring is completely released after a fixed time. When the spring releases energy, it drives the arc plate 622 to rotate. Therefore, after a fixed time, the arc plate 622 rotates to contact the front transverse plate 52 and drives the front transverse plate 52 to be at the same vertical position as the front shift plate 56. In the straight surface, after the first turntable 54 rotates, the front horizontal plate 52 and the front door plate 41 are driven to move upward again through the front dial plate 56, so that the inlet of the detection channel 2 is opened, which can ensure the length of time that the exhaust gas sample stays in the detection channel 2, thereby ensuring that the detection work proceeds smoothly. In this way, the function of automatic cycle sampling can be realized; the exhaust gas discharged from thermal power plants is generally at a high temperature. When the electrical system is used, not only the use cost is increased, but also the electrical system is prone to failure in a high temperature environment for a long time. The device does not need to set up an additional electrical system for controlling the sealing door plate 4, which is more convenient and reliable to use, and has better adaptability to the high temperature exhaust gas emission environment;

[0063] Since the front transverse plate 52 is located in front of the front shift plate 56, after the first rotating disk 54 rotates, the front shift plate 56 does not contact the front transverse plate 52, and does not drive the front door plate 41 to move. Therefore, the front door plate 41 is always in a closed state. At this time, the sleeve 83 does not contact the movable shaft 72, the movable shaft 72 does not rotate, and the cleaning cloth 74 is covered inside the sealing plate 75.

[0064] When detecting carbon dioxide in the exhaust gas, the detection unit 3 and the electromagnet 85 are energized. The electromagnet is energized and repels the magnetic block 841 with the same polarity, thereby pushing the push plate 84 to move, and the push plate 84 drives the sleeve 83 to move. After the sleeve 83 moves, the active gear 832 and the driven gear 541 are staggered front and back and the movable shaft 72 is inserted into the assembly groove 831. At this time, the first turntable 54 and the second turntable 55 stop rotating. After the sleeve 83 moves, it pushes the movable shaft 72 to move. The movable shaft 72 rotates with the sleeve 83 during the movement. The slide plate 73 and the round rod 77 slide outward under the action of centrifugal force, thereby pushing the two sealing plates 75 away from each other. Then, as the movable shaft 72 continues to move, the cleaning cloth 74 moves to the outside of the sealing plate 75 and contacts the detection unit 3 to wipe and clean the detection unit 3; when no monitoring work is performed, the detection unit 3 and the electromagnet 85 are disconnected. After the electromagnet 85 is powered off, it becomes a magnetic conductor and is attracted to the magnetic block 841, thereby driving the push plate 84 and the sleeve 83 to move back and reset. Since the assembly groove 831 in the sleeve 83 is frictionally connected with the movable shaft 72, the sleeve 83 drives the movable shaft 72 to move back and reset. When the movable shaft 72 moves back to the initial position and cannot move further, the sleeve 83 continues to move back and separates from the movable shaft 72. At this time, the cleaning cloth 74 moves back to between the inside of the two sealing plates 75. Under the push of the sealing spring 76, the two sealing plates 75 are closed together again to cover the cleaning cloth 74, and the entire device completes automatic reset. In this way, the function of automatically cleaning the detection unit 3 and sealing and protecting the cleaning cloth 74 when not cleaning is realized, which extends the service life of the cleaning cloth 74 and ensures the detection effect of the detection unit 3. It can also automatically cycle and has a high degree of automation and is more convenient to use.

[0065] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An automatic monitoring device for key sources of carbon dioxide emissions, comprising a housing (1), characterized in that: Also includes: A detection channel (2) is arranged inside the box (1), and the interior of the detection channel (2) is used to collect exhaust gas samples; A detection unit (3) disposed in the detection channel (2) and used for detecting carbon dioxide in the exhaust gas; Sealing door panels (4) are slidably arranged at the inlet and outlet of the detection channel (2), respectively. The sealing door panels (4) include a front door panel (41) and a rear door panel (42). The front door panel (41) and the rear door panel (42) are moved downward to seal the detection channel (2).

2. The automatic monitoring device for key sources of carbon dioxide emissions according to claim 1 is characterized in that: It also includes an opening and closing mechanism (5) for controlling the lifting and lowering of the sealing door panel (4), wherein the opening and closing mechanism (5) includes: A closing spring (51) for pushing the sealing door plate (4) downward; A pressure plate provided on the sealing door plate (4), the pressure plate comprising a front transverse plate (52) and a rear transverse plate (53), the front transverse plate (52) being slidably provided on the front door plate (41), and the rear transverse plate (53) being fixedly connected to the rear door plate (42); Rotating a first rotating disk (54) and a second rotating disk (55) arranged inside the box (1); A toggle member is respectively arranged on the first rotating disk (54) and the second rotating disk (55), and the toggle member comprises a front toggle plate (56) and a rear toggle plate (57) respectively arranged on the first rotating disk (54) and the second rotating disk (55). After the first rotating disk (54) and the second rotating disk (55) rotate, the sealing door plate (4) is driven to move upward through the cooperation between the toggle member and the pressure plate.

3. The automatic monitoring device for key sources of carbon dioxide emissions according to claim 2 is characterized in that: The invention also comprises a control mechanism (6), wherein the control mechanism (6) comprises: A push spring (61) for pushing the front transverse plate (52) away from the toggle member; A timing spring assembly (62) is arranged on the front door plate (41), a ratchet (621) is arranged on the input shaft of the timing spring assembly (62), an arc plate (622) is arranged on the output shaft of the timing spring assembly (62), a slope is arranged at the end of the arc plate (622), and after the output shaft rotates, the front transverse plate (52) is pushed close to the front shift plate (56) through the arc plate (622); A ratchet group (63) is arranged inside the box body (1); after the front door panel (41) moves upward, the ratchet wheel (621) is meshed and connected with the ratchet group (63) and rotates in one direction.

4. The automatic monitoring device for key sources of carbon dioxide emissions according to claim 3 is characterized by: After the front door panel (41) moves downward to seal the detection channel (2), the pawl group (63) is located above the ratchet wheel (621), the pawl group (63) and the ratchet wheel (621) are staggered up and down, the first rotating disk (54) and the second rotating disk (55) are meshed and connected, and the front shift plate (56) and the rear shift plate (57) are staggered.

5. The automatic monitoring device for key sources of carbon dioxide emissions according to claim 3 is characterized by: It also includes a cleaning mechanism (7) for cleaning the detection unit (3), and the cleaning mechanism (7) includes: A sealing box (71) fixedly connected to the inside of the detection channel (2); A movable shaft (72) movably arranged inside the sealing box (71); A plurality of slide plates (73) slidably arranged around the movable shaft (72); A cleaning cloth (74) is arranged on the slide plate (73), and the cleaning cloth (74) is located between the movable shaft (72) and the detection unit (3).

6. The automatic monitoring device for key sources of carbon dioxide emissions according to claim 5 is characterized by: The cleaning mechanism (7) further comprises: Two sealing plates (75) slidably arranged on the sealing box (71); A sealing spring (76) is arranged on the sealing plate (75), and the two sealing plates (75) are closed under the push of the sealing spring (76), and the cleaning cloth (74) is located inside the closed space formed by the sealing plate (75) and the sealing seat.

7. The automatic monitoring device for key sources of carbon dioxide emissions according to claim 6 is characterized by: The inner side wall of the sealing plate (75) is provided with a slope. The cleaning mechanism (7) further comprises a round rod (77) provided at the end of the slide plate (73). After the movable shaft (72) rotates, the slide plate (73) moves outward and pushes the two sealing plates (75) away from each other through the round rod (77).

8. The automatic monitoring device for key sources of carbon dioxide emissions according to claim 7 is characterized by: It also includes a driving mechanism (8), wherein the driving mechanism (8) includes: Rotating a rotating shaft (81) disposed on the box body (1); an impeller (82) fixedly connected to the rotating shaft (81), wherein the impeller (82) is located outside the casing (1); a sleeve (83) slidably arranged on the rotating shaft (81), the sleeve (83) being located inside the box body (1), the sleeve (83), the rotating shaft (81) and the movable shaft (72) being coaxial, and a mounting groove (831) being arranged on one side of the sleeve (83) close to the sleeve (83); A push plate (84) is slidably arranged inside the box (1), the push plate (84) is engaged with the sleeve (83), and the push plate (84) moves to drive the sleeve (83) to move; A magnetic block (841) fixedly connected to the push plate (84); An electromagnet (85) is arranged inside the box (1). When energized, the electromagnet (85) repels the magnetic block (841) and pushes the push plate (84) to move, so that the movable shaft (72) is inserted into the assembly groove (831).

9. The automatic monitoring device for key sources of carbon dioxide emissions according to claim 8, characterized in that: The driving mechanism (8) further comprises: A driven gear (541) fixedly connected to the first rotating disk (54); A driving gear (832) is fixedly connected to the sleeve (83), and the driving gear (832) is meshed with the driven gear (541) for transmission.

10. The automatic monitoring device for key sources of carbon dioxide emissions according to claim 8, characterized in that: The driving mechanism (8) further comprises: A baffle (86) is slidably arranged in the box body (1), and a stopper is provided at the end of the baffle (86) for blocking the push plate (84), and the stopper is a one-way rotating structure; a return spring (87) for pushing the baffle plate (86) to block in front of the push plate (84); The bevel plate (88) arranged on the sealing door plate (4) is rotated, the bevel plate (88) is inclined, and the bevel plate (88) is a one-way rotating structure. After the sealing door plate (4) moves downward, the bevel plate (88) drives the baffle plate (86) away from the push plate (84).

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