Conveying mechanism and filling system

Abstract

The utility model relates to a conveying mechanism and a filling system. The conveying mechanism comprises a conveying belt, an isolation hood and an air replacement assembly. The conveying belt is used for conveying target pieces; the isolation hood is arranged above the conveying belt in a covering mode and extends from one end of the conveying belt to the other end of the conveying belt in the conveying direction of the conveying belt; the air replacement assembly is used for inputting protective gas into the isolation hood so that air above the conveying belt can be exhausted out of the isolation hood. According to the conveying mechanism, the isolation hood and the air replacement assembly are additionally arranged, so that target parts (such as canned beer) on the conveying belt can be isolated from air, oxygen in the air and substances such as alcohols, esters, aldehydes, ketones, volatile acids, phenols and sulfur-containing compounds in the canned beer can be prevented from being subjected to an oxidation reaction, the total oxygen content of the canned beer can be reduced, and the service life of the canned beer is prolonged. The beer is guaranteed to be refreshing and mellow, and the taste of the beer can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of filling, and particularly relates to a conveying mechanism and a filling system. Background Art

[0002] With the gradual improvement of consumers' requirements for the taste of beer, beer enterprises have become more and more strict in quality management during the brewing and filling processes. Among them, the control of total oxygen in the beer body is particularly important. The presence of oxygen can undergo oxidation reactions with substances such as alcohols, esters, aldehydes, ketones, volatile acids, phenols, and sulfur-containing compounds in the finished beer, affecting the briskness and mellowness of the beer, increasing the after-bitterness of the beer, deteriorating the beer flavor, and having an obvious aging taste when drinking. In recent years, due to the portable characteristics of canned beer, it has been favored by more and more consumers. However, compared with bottled beer, canned beer is affected by its own can-pulling performance and cannot effectively isolate the beer liquid in the can from the air during the filling process, resulting in a relatively high total oxygen content in canned products, thus affecting the taste of the beer. Utility Model Content

[0003] Based on this, it is necessary to provide a conveying mechanism and a filling system for the above technical problems.

[0004] A conveying mechanism includes:

[0005] A conveyor belt for conveying a target item;

[0006] An isolation cover is disposed above the conveyor belt and extends from one end of the conveyor belt to the other end along the conveying direction of the conveyor belt; and

[0007] An air replacement component for inputting a protective gas into the isolation cover to discharge the air above the conveyor belt from the isolation cover.

[0008] In one embodiment, the air replacement component includes a first conveying pipeline and a first nozzle;

[0009] The first conveying pipeline is used for conveying the protective gas. The first conveying pipeline is located above the conveyor belt and extends into the isolation cover. The first nozzle is located in the isolation cover and is communicated with the first conveying pipeline.

[0010] In one embodiment, the first conveying pipeline penetrates through the isolation cover along the conveying direction of the conveyor belt. The first nozzle is provided in multiple numbers. The multiple first nozzles are divided into multiple groups along the conveying direction of the conveyor belt. Each group of the first nozzles includes multiple first nozzles spaced circumferentially along the first conveying pipeline.

[0011] In one embodiment, the first nozzle faces the top wall of the isolation cover, and the top wall of the isolation cover is inclined.

[0012] In one embodiment, the air replacement assembly further includes a first control valve, a steam-water separator, a pressure reducing valve, and a first check valve, all of which are located outside the isolation cover. The first control valve, the steam-water separator, the pressure reducing valve, and the first check valve are sequentially arranged on the first conveying pipeline along the conveying direction of the conveyor belt.

[0013] In one embodiment, the conveying mechanism further includes a cleaning assembly, which is used to convey cleaning liquid into the isolation cover to clean the isolation cover and the conveyor belt.

[0014] In one embodiment, the air replacement assembly includes a first conveying pipeline and a first nozzle; the first conveying pipeline is used to convey the protective gas, the first conveying pipeline is located above the conveyor belt and extends into the isolation cover, and the first nozzle is located in the isolation cover and communicates with the first conveying pipeline;

[0015] The cleaning assembly includes a connecting pipeline, the connecting pipeline is located outside the isolation cover and communicates with the first conveying pipeline, and the first conveying pipeline is also used to convey the cleaning liquid.

[0016] In one embodiment, the cleaning assembly further includes a second control valve and a second check valve, and the second control valve and the second check valve are sequentially arranged on the connecting pipeline along the conveying direction of the conveyor belt.

[0017] In one embodiment, the cleaning assembly further includes a liquid receiving tray, the liquid receiving tray is located below the conveyor belt and spans the conveyor belt along the conveying direction of the conveyor belt;

[0018] The downstream end of the first conveying pipeline extends into the liquid receiving tray after passing through the isolation cover, and a sewage discharge valve is provided at the downstream end.

[0019] A filling system includes a filling machine, a capping machine, and a conveying mechanism as described in any one of the above. The conveyor belt of the conveying mechanism is located between the filling machine and the capping machine along its conveying direction.

[0020] For the above-mentioned conveying mechanism and filling system, by adding an isolation cover and an air replacement assembly, the target parts (such as canned beer) on the conveyor belt can be isolated from the air, which can avoid the oxidation reaction between oxygen in the air and substances such as alcohols, esters, aldehydes, ketones, volatile acids, phenols, and sulfur-containing compounds in the canned beer, can reduce the total oxygen content of the canned beer, ensure the freshness and richness of the beer, and can improve the taste of the beer. Description of the Drawings

[0021] Figure 1 This is the front view of the conveying mechanism provided by an embodiment of the present application.

[0022] Figure 2 is Figure 1 the side view of the provided conveying mechanism.

[0023] Among them, the reference numerals in the drawings are explained as follows:

[0024] 10. Conveying mechanism; 100. Conveyor belt; 200. Isolation cover; 210. First top wall; 220. Second top wall; 300. Air replacement component; 310. First conveying pipeline; 320. First nozzle; 330. First control valve; 340. Steam-water separator; 350. Pressure reducing valve; 360. First check valve; 400. Cleaning component; 410. Connecting pipeline; 420. Second control valve; 430. Second check valve; 440. Liquid receiving tray; 441. Drain pipe; 450. Drain valve; 500. Driven wheel; 600. Power component; A. Target component. Detailed implementation manners

[0025] In order to make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0026] In the description of the present application, it should be understood that if there appear such terms as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0027] In addition, if the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, if the term "a plurality" appears, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0028] In this application, unless otherwise clearly specified and defined, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] In this application, unless otherwise clearly specified and defined, if there is a description such as a first feature being "on" or "under" a second feature, the meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0030] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0031] On the one hand, as Figure 1 and Figure 2As shown in the figure, an embodiment of the present application provides a conveying mechanism 10, which includes a conveyor belt 100, an isolation cover 200, and an air replacement component 300; the conveyor belt 100 is used to convey the target item A, the isolation cover 200 is disposed above the conveyor belt 100 and extends from one end of the conveyor belt 100 to the other end along the conveying direction of the conveyor belt 100; the air replacement component 300 is used to input a protective gas into the isolation cover 200 to discharge the air above the conveyor belt 100 from the isolation cover 200.

[0032] The conveying mechanism 10 can be applied in the field of beverage filling and can be installed between a filling machine and a capping machine. After the filling machine fills beverages such as liquor into open containers such as the target item A (e.g., aluminum cans), the conveyor belt 100 of the conveying mechanism 10 conveys the target item A to the capping machine for capping. Optionally, the conveying mechanism 10 further includes a driving wheel, a driven wheel 500, and a power component 600; the driving wheel and the driven wheel 500 are spaced apart and used to install the conveyor belt 100; the power component 600 is used to drive the driving wheel to rotate and can be an electric motor.

[0033] When the conveyor belt 100 conveys the target item A (e.g., canned beer), the air replacement component 300 can input a protective gas into the isolation cover 200. The protective gas can squeeze out the air above the conveyor belt 100 from the isolation cover 200, and can replace the air above the conveyor belt 100, thereby isolating the canned beer on the conveyor belt 100 from the air. It can avoid the oxidation reaction between the oxygen in the air and substances such as alcohols, esters, aldehydes, ketones, volatile acids, phenols, and sulfur-containing compounds in the canned beer, can reduce the total oxygen content of the canned beer, ensure the briskness and richness of the beer, and can improve the taste of the beer. Among them, the protective gas can be a gas that does not participate in the oxidation reaction, such as carbon dioxide or an inert gas. During conveying, high-density and high-pressure carbon dioxide can be conveyed above the isolation cover 200, and the carbon dioxide can press out the air above the conveyor belt 100 from top to bottom out of the isolation cover 200.

[0034] It should be noted that the conveying mechanism 10 is not only applicable to the field of beverage filling, but also can be applied to the field of chemical reagent perfusion, and can avoid the oxidation reaction between the chemical reagent and the oxygen in the air during the conveying process, which affects the use effect of the chemical reagent.

[0035] It can be seen that by adding the isolation cover 200 and the air replacement component 300, the conveying mechanism 10 can isolate the target item A (e.g., canned beer) on the conveyor belt 100 from the air, can avoid the oxidation reaction between the oxygen in the air and substances such as alcohols, esters, aldehydes, ketones, volatile acids, phenols, and sulfur-containing compounds in the canned beer, can reduce the total oxygen content of the canned beer, ensure the briskness and richness of the beer, and can improve the taste of the beer.

[0036] Such as Figure 1 andFigure 2 As shown, in some embodiments, the air displacement assembly 300 includes a first conveying pipeline 310 and a first nozzle 320; the first conveying pipeline 310 is used to convey a protective gas, the first conveying pipeline 310 is located above the conveyor belt 100 and extends into the isolation cover 200, and the first nozzle 320 is located in the isolation cover 200 and communicates with the first conveying pipeline 310. Through the cooperation of the first conveying pipeline 310 and the first nozzle 320, the external protective gas can be input into the isolation cover 200, which can simplify the structure of the conveying mechanism 10.

[0037] Optionally, as Figure 1 shown, the first conveying pipeline 310 penetrates through the isolation cover 200 along the conveying direction of the conveyor belt 100, the first nozzles 320 are provided in multiple numbers, and the multiple first nozzles 320 are divided into multiple groups along the conveying direction of the conveyor belt 100. Each group of first nozzles 320 includes multiple first nozzles 320 arranged at intervals along the circumferential direction of the first conveying pipeline 310 (see Figure 2 ). With such an arrangement, the first nozzles 320 can be distributed throughout the isolation cover 200 along the conveying direction of the conveyor belt 100, the air in each area of the isolation cover 200 can be discharged, and the target part A can be effectively isolated from the air.

[0038] Regarding the number of groups of the first nozzles 320 and the number of the first nozzles 320 in each group, the present application does not make specific limitations, as long as the target part A can be effectively isolated from the air.

[0039] In order to ensure that the protective gas can effectively displace the air above the conveyor belt 100 and facilitate the installation of the isolation cover 200, as Figure 2 shown, the isolation cover 200 can be a cover body with a closed top and an opening at the bottom. In this way, when a high-specific gravity and high-pressure protective gas is input to the upper side of the isolation cover 200, the protective gas can squeeze out the air from the lower opening of the isolation cover 200 by its own gravity and pressure; moreover, both sides in the width direction of the isolation cover 200 can be installed on the ground through mounting brackets, which also facilitates the fixing of the isolation cover 200. It should be noted that the width direction of the isolation cover 200 is based on Figure 2 shown.

[0040] Among them, the isolation cover 200 can be processed from a stainless steel plate or a transparent plastic plate. The width of the isolation cover 200 is greater than the width of the conveyor belt 100, and the height of the isolation cover 200 is greater than the height of the target part A during the conveyance on the conveyor belt 100.

[0041] In one embodiment, as Figure 2As shown, the first nozzle 320 faces the top wall of the isolation cover 200, and the top wall of the isolation cover 200 is inclined. The top wall of the isolation cover 200 can guide the protective gas, so that the protective gas starts to squeeze the air inside the isolation cover 200 downward from the top wall of the isolation cover 200.

[0042] Optionally, as Figure 2 shown, the top wall of the isolation cover 200 includes a connected first top wall 210 and a second top wall 220, and the connection part of the first top wall 210 and the second top wall 220 protrudes towards the outside of the isolation cover 200; each group of first nozzles 320 includes two first nozzles 320, one of the first nozzles 320 points to the first top wall 210, and the other first nozzle 320 points to the second top wall 220. With this setting, the number of the first nozzles 320 can be reduced, and the air above the conveyor belt 100 can be effectively replaced.

[0043] As Figure 1 shown, in some embodiments, the air replacement assembly 300 further includes a first control valve 330 located outside the isolation cover 200, and the first control valve 330 is arranged on the first conveying pipeline 310. When the filling machine is started, the first control valve 330 can be opened, and the protective gas can be ejected from the first nozzle 320 through the first conveying pipeline 310. When the filling machine is stopped and there is no target part A conveyed on the conveyor belt 100, the first control valve 330 can be closed to avoid waste of the protective gas and reduce the filling cost.

[0044] Among them, the first control valve 330 can be an electromagnetic valve or an electric valve, and the first control valve 330 is electrically connected to the controller of the filling machine. When the filling machine is started, the first control valve 330 automatically opens upon receiving the opening instruction sent by the controller of the filling machine. Of course, in some other embodiments, the first control valve 330 can also be a pneumatic valve or a manual valve.

[0045] In one embodiment, as Figure 1 shown, the air replacement assembly 300 further includes a steam-water separator 340 located outside the isolation cover 200, and the first control valve 330 and the steam-water separator 340 are sequentially arranged on the first conveying pipeline 310 along the conveying direction of the conveyor belt 100. When the protective gas passes through the steam-water separator 340, the steam-water separator 340 can discharge the moisture in the protective gas, and can avoid the moisture in the protective gas itself from entering the target part A after being ejected from the first nozzle 320, resulting in a decrease in the concentration of the product in the target part A and affecting the taste.

[0046] In one embodiment, as Figure 1As shown, the air replacement assembly 300 further includes a pressure reducing valve 350 located outside the isolation cover 200. The first control valve 330, the steam-water separator 340, and the pressure reducing valve 350 are sequentially arranged on the first conveying pipeline 310 along the conveying direction of the conveyor belt 100. The pressure reducing valve 350 can adjust the pressure of the protective gas to an appropriate level, which can not only prevent the protective gas from damaging the isolation cover 200 due to excessive pressure after spraying from the first nozzle 320, but also prevent the protective gas from being unable to effectively expel the air in the isolation cover 200 due to too low pressure after spraying from the first nozzle 320.

[0047] Among them, the pressure reducing valve 350 can be a proportional pressure reducing valve, an electronic pressure reducing valve, a flow-limiting pressure reducing valve, etc.

[0048] In one embodiment, as Figure 1 shown, the air replacement assembly 300 further includes a first check valve 360 located outside the isolation cover 200. The first control valve 330, the steam-water separator 340, the pressure reducing valve 350, and the first check valve 360 are sequentially arranged on the first conveying pipeline 310 along the conveying direction of the conveyor belt 100. The first check valve 360 can prevent the protective gas from flowing back, so that the protective gas can expel the air in the isolation cover 200 after spraying from the first nozzle 320.

[0049] Among them, the first check valve 360 can be a swing check valve or a lift check valve.

[0050] As Figure 1 shown, in some embodiments of the present application, the conveying mechanism 10 further includes a cleaning assembly 400. The cleaning assembly 400 is used to convey cleaning liquid into the isolation cover 200 to clean the isolation cover 200 and the conveyor belt 100. The cleaning assembly 400 can prevent the target part A from being contaminated during the conveying process and ensure the safety of the target part A during the conveying process.

[0051] In one embodiment, as Figure 1 shown, the cleaning assembly 400 includes a connecting pipeline 410. The connecting pipeline 410 is located outside the isolation cover 200 and is connected to the first conveying pipeline 310. The first conveying pipeline 310 is also used to convey the cleaning liquid. When the conveyor belt 100 stops conveying the target part A, the cleaning liquid sequentially passes through the connecting pipeline 410 and the first conveying pipeline 310, and is sprayed out through the first nozzle 320, so as to clean the isolation cover 200 and the conveyor belt 100, and prevent foreign matters on the isolation cover 200 and the conveyor belt 100 from contaminating the target part A during the process of the conveyor belt 100 conveying the target part A. Among them, the cleaning liquid can be water or other chemical cleaning liquids.

[0052] The cleaning assembly 400 with this structure shares the first conveying pipeline 310 and the first nozzle 320 with the air replacement assembly 300, which can simplify the structure of the conveying mechanism 10 and reduce costs.

[0053] Of course, in some other embodiments, the cleaning assembly 400 includes a second conveying pipeline and a second nozzle. The second conveying pipeline is used to convey the cleaning liquid. The second conveying pipeline is located above the conveyor belt 100 and extends into the isolation cover 200. The second nozzle is located in the isolation cover 200 and is communicated with the second conveying pipeline.

[0054] Wherein, the positional arrangement and the number setting of the second conveying pipeline and the second nozzle are respectively the same as those of the first conveying pipeline 310 and the first nozzle 320. By way of example, when the first conveying pipeline 310 and the first nozzle 320 are arranged as Figure 1 and Figure 2 shown, the second conveying pipeline penetrates through the isolation cover 200 along the conveying direction of the conveyor belt 100. The second nozzle is provided in multiple numbers. The multiple second nozzles are divided into multiple groups along the conveying direction of the conveyor belt 100. Each group of second nozzles includes multiple second nozzles arranged at intervals along the circumferential direction of the second conveying pipeline.

[0055] Furthermore, as Figure 1 shown, in some embodiments, the cleaning assembly 400 further includes a second control valve 420. The second control valve 420 is arranged on the connecting pipeline 410. By switching the opening and closing of the first control valve 330 and the second control valve 420, the air displacement assembly 300 and the cleaning assembly 400 are used alternately, which can ensure the normal use of the conveying mechanism 10.

[0056] Wherein, the second control valve 420 can be a CIP (Cleaning In Place) cleaning valve. The CIP cleaning valve refers to a control valve used in a CIP cleaning system. This type of valve is an electromagnetic valve or an electric valve and can be electrically connected to the controller of the filling machine. When the filling machine is shut down, the second control valve 420 automatically opens upon receiving an opening instruction sent by the controller of the filling machine. Of course, in some other embodiments, the second control valve 420 can also be a pneumatic valve or a manual valve.

[0057] In one embodiment, as Figure 1 shown, the cleaning assembly 400 further includes a second check valve 430. The second control valve 420 and the second check valve 430 are sequentially arranged on the connecting pipeline 410 along the conveying direction of the conveyor belt 100. The second check valve 430 can prevent the cleaning liquid from flowing back, so that the cleaning liquid can be ejected smoothly from the first nozzle 320, and the isolation cover 200 and the conveyor belt 100 can be effectively cleaned.

[0058] Wherein, the second check valve 430 can be a swing check valve or a lift check valve.

[0059] Even further, as Figure 1 and Figure 2As shown, the cleaning assembly 400 further includes a liquid receiving tray 440. The liquid receiving tray 440 is located below the conveyor belt 100 and spans the conveyor belt 100 along the conveying direction of the conveyor belt 100. The cleaning liquid sprayed from the nozzles and the wastewater after cleaning can fall into the liquid receiving tray 440, avoiding environmental pollution. Among them, the length of the liquid receiving tray 440 is greater than the length of the conveyor belt 100 and the length of the isolation cover 200, and the width is greater than the width of the conveyor belt 100 and the width of the isolation cover 200.

[0060] Among them, as Figure 1 and Figure 2 shown, a sewage pipe 441 is connected to the bottom of the liquid receiving tray 440. After the cleaning liquid sprayed from the nozzles and the wastewater after cleaning are collected by the liquid receiving tray 440, they can be discharged to the trench through the sewage pipe 441.

[0061] In an embodiment, as Figure 1 and Figure 2 shown, the downstream end of the first conveying pipeline 310 extends into the liquid receiving tray 440 after passing through the isolation cover 200, and a sewage discharge valve 450 is provided at the downstream end. The sewage discharge valve 450 can be intermittently opened to discharge sewage from the first conveying pipeline 310. Among them, the sewage discharge valve 450 can be a manual valve, a pneumatic valve, an electric valve or an electromagnetic valve.

[0062] On the other hand, another embodiment of the present application further provides a filling system. The filling system includes a filling machine, a capping machine and the conveying mechanism 10 as described in any one of the above. The conveyor belt 100 of the conveying mechanism 10 is located between the filling machine and the capping machine along its own conveying direction.

[0063] This filling system can be applied to the field of beverage filling. After the filling machine fills beverages such as wine into open containers such as cans of target part A, the conveyor belt 100 of the conveying mechanism 10 conveys the target part A to the capping machine for capping treatment.

[0064] When the conveyor belt 100 conveys the target part A (such as canned beer), the air displacement assembly 300 can input a protective gas into the isolation cover 200. The protective gas can squeeze the air above the conveyor belt 100 out of the isolation cover 200, displacing the air above the conveyor belt 100, thereby isolating the canned beer on the conveyor belt 100 from the air. It can avoid the oxidation reaction between oxygen in the air and substances such as alcohols, esters, aldehydes, ketones, volatile acids, phenols and sulfur-containing compounds in the canned beer, reduce the total oxygen content of the canned beer, ensure the briskness and richness of the beer, and improve the taste of the beer. Among them, the protective gas can be a gas that does not participate in the oxidation reaction, such as carbon dioxide or an inert gas. During transportation, high-specific-gravity and high-pressure carbon dioxide can be conveyed above the isolation cover 200, and the carbon dioxide can press the air above the conveyor belt 100 out of the isolation cover 200 from top to bottom.

[0065] It should be noted that the conveying mechanism 10 is not only applicable to the field of beverage filling, but also can be applied to the field of chemical reagent perfusion, which can avoid the reaction of chemical reagents with oxygen in the air during the conveying process and affect the use effect of chemical reagents.

[0066] It can be seen that in this filling system, by adding an isolation cover 200 and an air replacement component 300 to the conveying mechanism 10, the target item A (such as canned beer) on the conveyor belt 100 can be isolated from the air, which can avoid the oxidation reaction of oxygen in the air with substances such as alcohols, esters, aldehydes, ketones, volatile acids, phenols and sulfur-containing compounds in the canned beer, can reduce the total oxygen content of the canned beer, ensure the briskness and richness of the beer, and can improve the taste of the beer.

[0067] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0068] The above-described embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A conveying mechanism, characterized in that, Comprising: A conveyor belt for conveying the target piece; An isolation cover, which is arranged above the conveyor belt and extends from one end of the conveyor belt to the other end along the conveying direction of the conveyor belt; And An air replacement assembly for inputting a protective gas into the isolation cover to discharge the air above the conveyor belt from the isolation cover.

2. The conveying mechanism according to claim 1, characterized in that, The air replacement assembly includes a first conveying pipeline and a first nozzle; The first conveying pipeline is used for conveying the protective gas. The first conveying pipeline is located above the conveyor belt and extends into the isolation cover. The first nozzle is located in the isolation cover and is communicated with the first conveying pipeline.

3. The conveying mechanism according to claim 2, wherein, The first conveying pipeline penetrates through the isolation cover along the conveying direction of the conveyor belt. The first nozzles are provided in multiple numbers. The multiple first nozzles are divided into multiple groups along the conveying direction of the conveyor belt. Each group of the first nozzles includes multiple first nozzles arranged at intervals along the circumferential direction of the first conveying pipeline.

4. The conveying mechanism according to claim 2, wherein The first nozzle faces the top wall of the isolation cover, and the top wall of the isolation cover is inclined.

5. The conveying mechanism according to claim 2, characterized in that, The air replacement assembly further includes a first control valve, a steam-water separator, a pressure reducing valve and a first check valve, all of which are located outside the isolation cover. The first control valve, the steam-water separator, the pressure reducing valve and the first check valve are sequentially arranged on the first conveying pipeline along the conveying direction of the conveyor belt.

6. The conveying mechanism according to any one of claims 1 to 5, characterized in that The conveying mechanism further includes a cleaning assembly for conveying a cleaning liquid into the isolation cover to clean the isolation cover and the conveyor belt.

7. The conveying mechanism according to claim 6, wherein The air replacement assembly includes a first conveying pipeline and a first nozzle; the first conveying pipeline is used for conveying the protective gas. The first conveying pipeline is located above the conveyor belt and extends into the isolation cover. The first nozzle is located in the isolation cover and is communicated with the first conveying pipeline; The cleaning assembly includes a connecting pipeline, which is located outside the isolation cover and is communicated with the first conveying pipeline. The first conveying pipeline is also used for conveying the cleaning liquid.

8. The conveying mechanism according to claim 7, wherein, The cleaning assembly further includes a second control valve and a second check valve, and the second control valve and the second check valve are sequentially arranged on the connecting pipeline along the conveying direction of the conveyor belt.

9. The conveying mechanism according to claim 7, wherein The cleaning assembly further includes a liquid receiving tray, which is located below the conveyor belt and straddles the conveyor belt along the conveying direction of the conveyor belt; The downstream end of the first conveying pipeline extends into the liquid receiving tray after passing through the isolation cover, and a sewage discharge valve is provided at the downstream end.

10. A filling system, characterized in that, Including a filling machine, a capping machine and the conveying mechanism according to any one of claims 1 to 9, and the conveyor belt of the conveying mechanism is located between the filling machine and the capping machine along its own conveying direction.

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