Feeding device of continuous gas purification equipment

Abstract

The utility model discloses a feeding device of continuous gas purification equipment, which comprises a feeding funnel positioned on one side of the upper part of a shell, and is characterized in that the lower end of the feeding funnel penetrates into the shell and is arranged opposite to one end of a feeding platform in the length direction; the feeding platform is horizontally fixed in the inner cavity of the shell, the two sides of the feeding platform in the width direction are located above the purification areas arranged in pairs, and a scraping mechanism is arranged on the feeding platform and used for scraping materials to the purification areas on the two sides. The utility model has the advantages that the continuous feeding of the filler is conveniently realized, the feeding sealing is realized, the feeding uniformity is ensured, the stability of the system is ensured, and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial gas purification and treatment, in particular to a feeding device for continuous gas purification equipment. Background Art

[0002] Industrial flue gas is the gaseous product of fuel combustion in the industrial production process of an enterprise. It usually contains a large amount of harmful substances such as solid dust and toxic gases, especially the carbon monoxide gas that has attracted much attention in recent years. Conventional carbon monoxide treatment equipment and other types of flue gas purification equipment all use a fixed bed filler structure. For example, CN202311805432.5 discloses a flue gas treatment device that utilizes the calorific value of carbon monoxide in sintering flue gas, and CN202021463211.6 discloses a combined removal device for carbon monoxide and nitrogen oxides from sintering flue gas. In these technologies, the purification fillers are all laid on fixed filter plates, and the flue gas is controlled to pass through the fillers and filter plates for purification. There are defects such as low treatment efficiency and inconvenient filler replacement.

[0003] The applicant previously applied for patent number 2024213766018, "A Moving Bed Sintering Flue Gas Treatment Equipment." This equipment features a fixed catalytic bed for denitrification at the top and a moving bed for carbon monoxide purification at the bottom. The moving bed improves carbon monoxide purification efficiency and facilitates replacement of the carbon monoxide catalyst packing. However, this equipment still suffers from the following drawbacks: 1. While denitrification and carbon monoxide purification are simultaneously achieved within the same device, the denitrification portion still utilizes a fixed bed, which still presents the drawback of inconvenient packing replacement. 2. The carbon monoxide purification utilizes a horizontally arranged moving bed structure, but the equipment's horizontal space is limited, hindering treatment efficiency. 3. The packing activity at the head and tail of this horizontal moving bed differs significantly, yet the flue gas pressure and flow rate remain the same. This reduces the packing's treatment effectiveness and efficiency, resulting in poor treatment of the flue gas passing through the tail of the moving bed.

[0004] In order to solve the above problems, the applicant designed a feeding device for continuous gas purification equipment, including an outer shell, which is characterized in that the inner part of the outer shell is provided with purification areas arranged vertically and spaced horizontally in pairs, and each pair of purification areas is composed of four vertically arranged and horizontally spaced air-permeable baffles. An upper baffle is fixed horizontally between the upper ends of the two air-permeable baffles inside each pair of purification areas, and the upper ends of the purification areas on both sides of the upper baffle are open. A lower baffle is also fixed horizontally between the lower ends of the two air-permeable baffles outside each pair of purification areas and the outer shell or other pairs of purification areas. A discharge device is provided at the outlet below each purification area, and a feeding device is also provided on the upper part of the outer shell to connect with the opening at the upper end of each purification area. A gas inlet is provided at the top of the outer shell to communicate with the air-permeable space outside each pair of purification areas, and a gas outlet is provided at the bottom to communicate with the air-permeable space inside each pair of purification areas.

[0005] This allows for easy online replacement of packing, and continuous packing. The contact area between the packing and the gas is increased, and the packing flow direction is aligned with the direction of gas pressure reduction, ensuring a consistent match between packing activity and gas flux, thus improving treatment effectiveness and efficiency.

[0006] However, when designing the equipment, how to facilitate the filler to enter the purification area better, realize continuous feeding and ensure sealing, and ensure the uniformity of feeding have become technical issues that need to be considered and solved. Utility Model Content

[0007] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is: how to provide a feeding device for continuous gas purification equipment that is convenient for realizing continuous feeding and allows the filler to enter the vertical purification area arranged in pairs, realizes feeding sealing, and further enables it to realize uniform feeding and improve system stability.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0009] A feeding device for continuous gas purification equipment includes a feeding funnel located on one side of the upper part of an outer shell, and is characterized in that the lower end of the feeding funnel penetrates into the outer shell and is arranged opposite one end of the feeding platform in the length direction, the feeding platform is horizontally fixed in the inner cavity of the outer shell and both sides in the width direction are located above the purification areas arranged in pairs, and a scraping mechanism is provided on the feeding platform for scraping the material to the purification areas on both sides.

[0010] In this way, a feeding platform is set above the upper partition at the upper end of each pair of purification areas. The filler enters the feeding platform through the funnel, and then relies on the scraping mechanism to scrape the material to the purification areas on both sides, completing the mobile feeding from the feeding funnel to the vertical purification area, ensuring the continuous processing effect of the filler.

[0011] Furthermore, a sealed feeding mechanism is provided at the outlet at the lower end of the feed funnel, and the sealed feeding mechanism includes a horizontally arranged feeding space, the upper side of the outer side of the feed space is connected to the feed funnel, and the outlet on the lower side is designed to face the end of the feed platform. A feed shaft is horizontally arranged in the middle position of the feed space, and a plurality of rotating scrapers are evenly installed on the feed shaft. The rotating scrapers are arranged along the axial direction of the feed shaft and the outer side is close to or attached to the inner wall of the feed space. One end of the feed shaft is connected to the feed control motor.

[0012] In this way, after the filler flows down from the feed hopper into the feed space, the feed control motor drives the feed shaft to rotate, and the rotation of the rotating scraper controls the filler to be scraped out downwards. This ensures the sealing effect while achieving control over the feed, and can also adjust the feed rate to prevent gas from overflowing from the feed device.

[0013] Furthermore, the scraping mechanism includes two circular chains horizontally arranged on both sides of the feeding platform, and the upper half of each of the two circular chains is horizontally arranged along the edge positions on both sides of the upper surface of the feeding platform. The two ends of the two circular chains are respectively installed on a pair of sprockets vertically arranged on both sides of the two ends of the feeding platform. The sprockets are connected to the scraper motor for transmission. A plurality of vertically arranged scrapers are horizontally fixedly connected between the two circular chains. The lower surface of the scraper on the upper half of the circular chain is adjacent to the upper surface of the feeding platform (a spacing space is left between the upper cover plate and the feeding platform for the scraper on the lower side of the circular chain to move).

[0014] In this way, the scraper motor drives the sprocket and chain to circulate, which in turn drives the scraper to move along the upper surface of the feed platform from one end to the other, scraping the filler that has fallen onto the feed platform to both sides and into the corresponding purification area. This allows for the convenient and rapid transfer of filler from the feed device to the purification area, achieving continuous filler processing.

[0015] Furthermore, adjacent scrapers are evenly spaced to better ensure uniform and continuous transfer of fillers.

[0016] Furthermore, any two adjacent scrapers are symmetrically arranged to tilt in opposite directions to form an eight-shaped shape.

[0017] This makes it easier for the two adjacent scrapers to scrape the material to different sides of the feed platform. The inclined scrapers can more quickly scrape the material to the side of the feed platform. The inclined arrangement refers to an inclined (non-vertical) arrangement relative to the chain.

[0018] Furthermore, the upper end edge of the scraper on the upper surface of the feeding platform has a folded portion inclined rearward and upward, and the horizontal projection of the upper side edge of the folded portion is perpendicular to the chain (the rear upward refers to the rear upward direction opposite to the forward direction).

[0019] This is because, when the scrapers are arranged in a figure-eight pattern, while the area between each two adjacent scrapers is the same, the feed material has a certain width. Therefore, when the filler drops off-center (i.e., the filler is not evenly distributed along the center when it lands on the feed platform), the figure-eight scrapers will exacerbate this uneven material drop, causing more material to fall toward the eccentric side (because more material falls into the figure-eight area on the eccentric side). Therefore, after the above improvements, the upper ends of the scrapers are provided with a folded portion that extends backward and upward to a position perpendicular to the chain. This ensures that the material falling between two adjacent scrapers falls along a rectangular area of ​​the same area. This means that even if the filler falls off-center onto the feed platform, the amount of material falling between each two adjacent scrapers remains the same. Therefore, the above structure ensures that even if the material falls off-center onto the feed platform, the amount of material scraped toward the purification areas on both sides is balanced, better ensuring the smooth operation of the entire equipment.

[0020] Furthermore, the lower end of the scraper on the upper surface of the feeding platform is fixed on a horizontally arranged connecting plate, the lower surface of the connecting plate is attached to or close to the feeding platform, and the two ends of the connecting plate have a vertical connecting part and are fixed to the chain by bolts passing through the connecting part.

[0021] In this way, the scraper is fixedly connected to the chain through the connecting plate, which is convenient for installation and setting. At the same time, the connecting plate is equivalent to widening the thickness of the scraping position where the scraper contacts the feed platform, which can better prevent wear and better ensure the scraping effect.

[0022] In summary, the utility model has the advantages of conveniently realizing continuous feeding of fillers, achieving feeding sealing and ensuring feeding uniformity, and ensuring system stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the front cross-section structure of a continuous gas purification device adopting the utility model.

[0024] Figure 2 for Figure 1 AA cross-sectional view.

[0025] Figure 3 for Figure 1 BB cross-sectional view.

[0026] Figure 4 for Figure 1 Schematic diagram of the structure of the separate scraping mechanism.

[0027] Figure 5 for Figure 4 Top view of .

[0028] Figure 6 for Figure 1 Schematic diagram of the structure of the separate material level monitoring device part. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below in conjunction with specific implementation methods.

[0030] Best embodiment: A continuous gas purification device using the structure of the utility model, such as Figure 1-6 As shown, the continuous gas purification equipment includes an outer shell 1, and the inner shell 1 has purification areas 2 arranged vertically and spaced horizontally in pairs. Each pair of purification areas 2 is composed of four vertically arranged and horizontally spaced gas baffles 3. The gas baffles are baffles with evenly distributed gas holes for gas to pass through but fillers cannot pass through. An upper baffle 4 is fixed horizontally between the upper ends of the two gas baffles in each pair of purification areas 2. The upper ends of the purification areas on both sides of the upper baffle 4 are open. A lower baffle 5 is also fixed horizontally between the lower ends of the two gas baffles outside each pair of purification areas 2 and the outer shell or other pairs of purification areas. A discharge device is provided at the outlet below each purification area, and a feeding device is also provided on the upper part of the shell to connect with the opening at the upper end of each purification area. A gas inlet 6 is provided at the top of the shell to communicate with the gas space outside each pair of purification areas, and a gas outlet 7 is provided at the bottom to communicate with the gas space inside each pair of purification areas. Figure 1-6 The continuous gas purification apparatus shown has only one pair of purification zones. Of course, when implementing the method, a continuous gas purification apparatus having multiple pairs of purification zones may also be used.

[0031] In this way, when the equipment is in use, the filler enters each purification zone from the feed device, the gas to be purified enters from the gas inlet at the top of the shell, then enters the gas flow space outside each pair of purification zones, then passes horizontally through the corresponding gas flow baffle to enter the purification zone interior to contact and react with the filler, then passes through the inner gas flow baffle to enter the gas flow space inside each pair of purification zones, and finally flows out from the gas outlet at the bottom of the shell. This facilitates online replacement of the filler and allows for continuous filling and processing. At the same time, the contact area between the filler and the gas is increased, and the direction of the filler flow is consistent with the direction of gas pressure reduction, so that the filler activity and gas flux are matched, thereby better improving the treatment effect and efficiency.

[0032] Among them, the feeding device includes a feeding funnel 8 located on one side of the upper part of the shell. The lower end of the feeding funnel 8 penetrates into the shell and is arranged opposite one end of the length direction of the feeding platform 9. The feeding platform 9 is horizontally fixed in the inner cavity of the shell and the two sides in the width direction are located above the purification areas 2 arranged in pairs. A scraping mechanism is provided on the feeding platform 9 for scraping the material to the purification areas on both sides.

[0033] In this way, a feeding platform is set above the upper partition at the upper end of each pair of purification areas. The filler enters the feeding platform through the funnel, and then relies on the scraping mechanism to scrape the material to the purification areas on both sides, completing the mobile feeding from the feeding funnel to the vertical purification area, ensuring the continuous processing effect of the filler.

[0034] Among them, a sealed feeding mechanism 10 is provided at the outlet of the lower end of the feeding funnel 8, and the sealed feeding mechanism 10 includes a horizontally arranged square feeding space, the upper side of the outer side of the feeding space is connected to the feeding funnel, and the outlet on the lower side of the inner side is designed to face the end of the feeding platform. A feeding shaft is horizontally arranged in the middle position of the feeding space, and a plurality of rotating scrapers are evenly installed on the feeding shaft. The rotating scrapers are arranged along the axial direction of the feeding shaft and the outer side is close to or attached to the inner wall of the feeding space. One end of the feeding shaft is connected to the feeding control motor.

[0035] In this way, after the filler flows down from the feed hopper into the feed space, the feed control motor drives the feed shaft to rotate, and the rotation of the rotating scraper controls the filler to be scraped out downwards. This ensures the sealing effect while achieving control over the feed, and can also adjust the feed rate to prevent gas from overflowing from the feed device.

[0036] Among them, the scraping mechanism includes two circular chains 11 horizontally arranged on both sides of the feeding platform, and the upper half of each of the two circular chains 11 is horizontally arranged along the edge positions on both sides of the upper surface of the feeding platform 9. The two ends of the two circular chains 11 are respectively installed on a pair of sprockets 12 vertically arranged on both sides of the two ends of the feeding platform. The sprockets 12 and the scraper motor 13 are connected in transmission. A plurality of vertically arranged scrapers 14 are horizontally fixedly connected between the two circular chains. The lower surface of the scraper on the upper half of the circular chain 11 is adjacent to the upper surface of the feeding platform (a spacing space is left between the upper cover plate and the feeding platform for the scraper on the lower side of the circular chain to move).

[0037] In this way, the scraper motor drives the sprocket and chain to circulate, which in turn drives the scraper to move along the upper surface of the feed platform from one end to the other, scraping the filler that has fallen onto the feed platform to both sides and into the corresponding purification area. This allows for the convenient and rapid transfer of filler from the feed device to the purification area, achieving continuous filler processing.

[0038] The adjacent scrapers 14 are evenly spaced to better ensure uniform and continuous transfer of the filler.

[0039] Among them, any two adjacent scrapers are symmetrically arranged in an eight-shaped shape with inclinations in opposite directions.

[0040] This makes it easier for the two adjacent scrapers to scrape the material to different sides of the feed platform. The inclined scrapers can more quickly scrape the material to the side of the feed platform. The inclined arrangement refers to an inclined (non-vertical) arrangement relative to the chain.

[0041] Among them, the upper end edge of the scraper 14 on the feeding platform has a folding portion 15 inclined backward and upward, and the horizontal projection of the upper side edge of the folding portion 15 is perpendicular to the chain (the rear upper side refers to the rear upper side opposite to the forward direction).

[0042] This is because, when the scrapers are arranged in a figure-eight pattern, while the area between each two adjacent scrapers is the same, the feed material has a certain width. Therefore, when the filler drops off-center (i.e., the filler is not evenly distributed along the center when it lands on the feed platform), the figure-eight scrapers will exacerbate this uneven material drop, causing more material to fall toward the eccentric side (because more material falls into the figure-eight area on the eccentric side). Therefore, after the above improvements, the upper ends of the scrapers are provided with a folded portion that extends backward and upward to a position perpendicular to the chain. This ensures that the material falling between two adjacent scrapers falls along a rectangular area of ​​the same area. This means that even if the filler falls off-center onto the feed platform, the amount of material falling between each two adjacent scrapers remains the same. Therefore, the above structure ensures that even if the material falls off-center onto the feed platform, the amount of material scraped toward the purification areas on both sides is balanced, better ensuring the smooth operation of the entire equipment.

[0043] Among them, the lower end of the scraper 14 on the upper surface of the feeding platform is fixed on a horizontally arranged connecting plate 16, and the lower surface of the connecting plate 16 is arranged in contact with or close to the feeding platform. The two ends of the connecting plate 16 have a vertical connecting part and are fixed to the chain by bolts passing through the connecting part.

[0044] In this way, the scraper is fixedly connected to the chain through the connecting plate, which is convenient for installation and setting. At the same time, the connecting plate is equivalent to widening the thickness of the scraping position where the scraper contacts the feed platform, which can better prevent wear and better ensure the scraping effect.

[0045] Among them, it also includes a material level monitoring device, which includes a material level meter 18 for feed monitoring, and also includes a detection chamber 17. The detection chamber 17 is arranged below the shell at the front end of the feed platform. The upper port of the detection chamber 17 is sealedly connected to the inner cavity of the shell and is connected to the upper end of the purification area through a horizontal connecting space. The material level meter 18 for feed monitoring is arranged in the detection chamber 17.

[0046] This is because a feed level meter is required at the upper port of the purification zone to monitor the filler loading level. Once the purification zone is fully filled, feedback control is required to reduce the feed rate to ensure stable and normal flow of filler within the device. However, the purification zone has high gas pressure and high temperature, and is constantly subject to filler drops and impacts. This harsh working environment causes the feed level meter installed there to frequently become unstable and have a short service life. Therefore, the applicant has creatively improved the level monitoring device by installing a detection chamber connected to the purification zone below the housing at the front end of the feed platform. In this way, when the filler in the purification zone is fully filled, it will gradually overflow forward and fall into the detection chamber. The feed level meter installed in the detection chamber can then determine whether the filler in the purification zone is fully filled, and then feedback is sent to the control center to adjust the feed rate of the feed device or directly alarm. In this way, because the pressure and temperature in the detection chamber are much lower than those in the purification zone and it does not have to withstand the long-term impact of filler drops, the stability and reliability of the level detection can be better guaranteed, and the service life of the feed level meter can be extended.

[0047] Among them, a protrusion 19 is formed on the outer shell 1 at the position opposite to the front end of the feeding platform. The front ends of the feeding platform and the ring chains on both sides thereof are extended and installed in the protrusion 19. A funnel is provided below the protrusion 19 and is connected to the upper end of the detection chamber 17.

[0048] In this way, if the space connecting the upper port of the detection chamber and the upper end of the purification area becomes blocked, the filler in the purification area will rise and accumulate to the feed platform. At this time, the filler on the feed platform cannot fall to the sides and will be directly driven by the scraper to the front end and fall downward into the detection chamber. The level meter for feed monitoring detects it and feeds back the control signal. Therefore, the reliability of material level monitoring can be better guaranteed.

[0049] The lower end of the detection chamber 17 is provided with a detection chamber outlet, and a detection chamber discharge valve 20 is installed at the detection chamber outlet.

[0050] In this way, it is convenient to discharge the filler in the detection chamber.

[0051] The detection chamber 17 has a mounting opening on its side, a detection flange is connected to the mounting opening, and the material level meter 18 for feed monitoring is horizontally mounted on the detection flange.

[0052] This makes it easier to load and unload the level meter used for feed monitoring.

[0053] Among them, at least two material level meters for feeding monitoring are installed in the detection chamber 17 along the height direction.

[0054] In this way, the feedback signal of the material level meter for feeding monitoring below can be used to control the feeding device to reduce the feeding rate, and the feedback signal of the material level meter for feeding monitoring above can be used to stop the feeding device from feeding, thereby better improving the control effect and ensuring system stability.

[0055] The upper end of the inspection chamber 17 is also provided with a maintenance opening 21, and a hole cover is fixedly installed at the maintenance opening 21 to achieve sealing, so as to facilitate maintenance.

[0056] Among them, the discharging device includes a discharging butterfly valve installed at the lower outlet position of the purification area, and also includes a horizontal conveying equipment 23 horizontally arranged below the lower outlet of the purification area. A discharging funnel is connected to the lower front end of the horizontal conveying equipment 23, and a discharging bin 24 is connected to the lower end of the discharging funnel. A discharge valve 25 is installed at the lower outlet of the discharging bin 24.

[0057] In this way, after the filler has completed its reaction and lost its activity in the purification zone, the discharge butterfly valve is controlled to open, and the deactivated filler falls from the lower outlet of the purification zone onto the horizontal conveying equipment below. It is then transported forward by the horizontal conveying equipment and falls into the discharge hopper, and then further into the discharge bin. When the discharge bin is full, the discharge valve can be opened to release the filler. This not only ensures the smooth discharge of the deactivated filler, but the existence of the discharge bin also enables the filler in the purification zone to be processed in both batch and continuous processes, greatly improving operational flexibility.

[0058] Wherein, described horizontal conveying equipment 23 is chain plate type conveyor. So it has the characteristics of simple and reliable structure. Of course, other horizontal conveying equipment such as belt conveyor can also be adopted during implementation.

[0059] Among them, the discharge butterfly valve includes a discharge shaft 26, which is horizontally arranged at the middle position of the outlet along the length direction of the lower end outlet of the purification area. One end of the discharge shaft 26 passes through the outer shell and is transmission-connected to the discharge motor 28. Discharge rafts 27 are also axially installed on both sides of the discharge shaft. When the discharge raft 27 rotates horizontally, it can stick to the inner wall of the lower end outlet of the purification area.

[0060] In this way, the discharge shaft can be rotated by the discharge motor to adjust the gap between the discharge raft and the inner wall at the lower outlet of the purification area, thereby achieving control of the discharge rate and closing.

[0061] Among them, a cut-off valve 29 is also installed at the lower end of the discharge funnel.

[0062] In this way, when opening the discharge bin to discharge materials, you can first close the isolation valve and temporarily rely on the discharge funnel to store the inactivated filler. After the discharge bin is discharged and the discharge valve is closed, the isolation valve can be opened. This can avoid air leakage when discharging materials from the discharge bin and better improve safety.

[0063] Wherein, the upper end position in the discharge bin 24 is also provided with a discharge material level meter 30. This facilitates timely reminder of discharge after the deactivated filler is fully accumulated in the discharge bin.

Claims

1. A feeding device for a continuous gas purification device, comprising a feeding funnel located on one side of the upper portion of a housing, characterized in that: The lower end of the feed funnel penetrates into the outer shell and is arranged opposite one end of the feed platform in the length direction. The feed platform is horizontally fixed in the inner cavity of the outer shell and both sides in the width direction are located above the purification areas arranged in pairs. A scraping mechanism is provided on the feed platform for scraping the material to the purification areas on both sides.

2. The continuous gas purification equipment feeding device according to claim 1, characterized in that: A sealed feeding mechanism is provided at the outlet at the lower end of the feed funnel. The sealed feeding mechanism includes a horizontally arranged feeding space. The upper side of the outer side of the feed space is connected to the feed funnel, and the outlet on the lower side is designed to face the end of the feed platform. A feed shaft is horizontally arranged in the middle position of the feed space, and a plurality of rotating scrapers are evenly installed on the feed shaft. The rotating scrapers are arranged along the axial direction of the feed shaft and the outer side is close to or attached to the inner wall of the feed space. One end of the feed shaft is connected to the feed control motor.

3. The feeding device of the continuous gas purification equipment according to claim 1, characterized in that: The scraping mechanism includes two circular chains horizontally arranged on both sides of the feeding platform, and the upper half of each of the two circular chains is horizontally arranged along the edge positions on both sides of the upper surface of the feeding platform. The two ends of the two circular chains are respectively installed on a pair of sprockets vertically arranged on both sides of the two ends of the feeding platform. The sprockets are connected to the scraping motor for transmission. A plurality of vertically arranged scrapers are horizontally fixedly connected between the two circular chains, and the lower surface of the scraper on the upper half of the circular chain is adjacent to the upper surface of the feeding platform.

4. The continuous gas purification equipment feeding device according to claim 3, characterized in that: Adjacent scrapers are evenly spaced.

5. The continuous gas purification equipment feeding device according to claim 3, characterized in that: Any two adjacent scrapers are symmetrically arranged to tilt in opposite directions to form an eight-shaped shape.

6. The feeding device of the continuous gas purification equipment according to claim 5, characterized in that: The upper end edge of the scraper on the upper surface of the feeding platform is provided with a folding portion inclined backward and upward, and the horizontal projection of the upper side edge of the folding portion is perpendicular to the chain.

7. The feeding device of the continuous gas purification equipment according to claim 3, characterized in that: The lower end of the scraper on the upper surface of the feeding platform is fixed on a horizontally arranged connecting plate. The lower surface of the connecting plate is attached to or close to the feeding platform. Both ends of the connecting plate have a vertical connecting part and are fixed to the chain by bolts passing through the connecting part.

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