Material transfer trolley

Abstract

The utility model relates to the technical field of material transfer, in particular to a material transfer trolley which comprises a transfer trolley body, a shell and an air supply assembly. The shell is provided with a material channel. The air supply assembly is arranged on the shell, the air supply assembly can filter and purify external air and then convey the air into the shell, when the material channel is opened or closed, the air supply assembly can keep positive air pressure in the shell, and the air supply assembly comprises an air pump and a filter part. The air pump is used for conveying external air into the shell, and when the material channel is opened or closed, the air pump can keep positive air pressure in the shell; the filtering piece is arranged at an air inlet of the air pump and used for filtering air sucked by the air pump. The filter part is arranged to filter gas sucked by the air pump, the air pump introduces the filtered gas into the shell, and the interior of the shell is kept in a positive pressure state, so that it is ensured that the gas can only flow to the outside from the shell, external air is prevented from entraining impurities to enter the shell to contaminate materials, and it is ensured that the materials are not polluted.

Description

Technical Field

[0001] The present application relates to the technical field of material transfer, and in particular to a material transfer vehicle. Background Art

[0002] As an indispensable piece of equipment in industrial production, material transfer vehicles have seen significant technological advancements. Currently, they are widely used in specialized environments such as photovoltaic plants.

[0003] In a photovoltaic factory, a clean room (also known as a clean room, dust-free room or clean room) is a specially designed room whose main purpose is to control pollutants such as particulate matter, harmful air, bacteria, etc. in the indoor air, while keeping the indoor temperature, cleanliness, indoor pressure, air flow speed and distribution, noise and vibration, lighting and static electricity within a specific range.

[0004] The main sources of pollution in clean rooms include external pollution and internal pollution.

[0005] a. External pollution mainly comes from outdoor sources, such as floating dust particles in the air or microorganisms, viruses, and protozoa in the atmosphere. These pollutants usually enter the clean room through doors, windows, transfer windows, or air supply systems, posing a threat to the clean environment.

[0006] b. Internal pollution mainly comes from dust generated by personnel, equipment and processes, as well as contaminated areas adjacent to the clean room. Specifically:

[0007] 1. People are the main source of air pollution in clean rooms, accounting for 80% to 90%. People's activities, such as walking and coughing, will produce a large number of microorganisms and particulate matter, affecting the cleanliness of the clean room.

[0008] 2. Equipment and process dust generation, especially rotating equipment such as motors, gear rotating parts, etc., generate particles due to friction between moving surfaces, which is also an important source of clean room pollution.

[0009] 3. The contaminated area adjacent to the clean room is another important source of pollution that affects the cleanliness of the room due to the polluted air carried in and out by people and materials, or the pollutants deposited on people and materials.

[0010] Material transfer carts typically use a loading box for shielding to prevent semi-finished solar cells from being contaminated during transport due to substandard surrounding conditions. This measure ensures cell quality to a certain extent, avoiding yield issues and reduced photovoltaic efficiency. However, when the cleanroom environment becomes contaminated for various reasons, products transported by conventional material transfer carts are still likely to be contaminated. This is because existing shielding methods cannot completely isolate external contamination sources, especially when the air quality inside the cleanroom deteriorates, which significantly increases the risk of cell contamination. Utility Model Content

[0011] The purpose of this application is to provide a material transfer vehicle that can further ensure that the material is not contaminated.

[0012] In order to achieve the above-mentioned purpose, an embodiment of the present application provides a material transfer vehicle, comprising a transfer vehicle body, a shell and an air supply assembly. The shell is arranged on the transfer vehicle body, and the shell has a material channel; the air supply assembly is arranged on the shell, and the air supply assembly can filter and purify the external air and then transport it into the shell. When the material channel is opened or closed, the air supply assembly can keep the inside of the shell at a positive air pressure. The air supply assembly includes an air pump and a filter element. The air pump is used to transport the external air into the shell. When the material channel is opened or closed, the air pump can keep the inside of the shell at a positive air pressure; the filter element is arranged at the air inlet of the air pump, and is used to filter the gas inhaled by the air pump.

[0013] In one embodiment, the air supply component further includes a controller and an air pressure differential sensor. The controller is electrically connected to the air pump and can control the start and stop of the air pump; the air pressure differential sensor is electrically connected to the controller and is used to detect the air pressure differential P between the outside and the inside of the shell and convert the detection result into an electrical signal and send it to the controller. The controller adjusts the power of the air pump according to the size of the air pressure differential P; when P≤A, the controller increases the power of the air pump; when A<P≤B, the controller keeps the air pump at the existing power; when B<P, the controller reduces the power of the air pump; wherein A is the first preset air pressure differential value, B is the second preset air pressure differential value, C is the third preset air pressure differential value, and A<B<C.

[0014] In one embodiment, the filter element includes a primary filter unit, and the filter pores of the primary filter unit are 5 μm.

[0015] In one embodiment, the filter element further includes a secondary filter unit, the filter pore of the secondary filter unit is 0.5 μm, the primary filter unit and the secondary filter unit are sequentially arranged along the gas flow direction, and the primary filter unit and the secondary filter unit filter the gas successively.

[0016] In one embodiment, the air supply component further includes an air duct, one end of which is connected to the air outlet of the air pump, and the other end of which is arranged inside the shell, and the air drawn by the air pump enters the shell through the air duct.

[0017] In one embodiment, the air duct includes branch pipes, the number of the branch pipes is more than two, the branch pipes are distributed at intervals in the shell, and the branch pipes are arranged on a side of the inner wall of the shell away from the material channel.

[0018] In one embodiment, a plurality of exhaust holes are provided on the branch pipe.

[0019] In one embodiment, at least two storage layers are provided in the shell.

[0020] In one embodiment, a material conveying member is provided on the storage layer, and the number of the material conveying member is more than one.

[0021] In one embodiment, the material transfer vehicle further includes a lifting soft curtain and a guide rail. The lifting soft curtain is arranged at the material channel on the shell, and the lifting soft curtain can open or close the material channel; the guide rail is arranged at the material channel of the shell, and the lifting soft curtain is slidably installed on the guide rail.

[0022] This application filters the gas inhaled by the air pump by setting a filter element. The air pump passes the filtered gas into the shell to maintain a positive pressure state inside the shell, thereby ensuring that the gas can only flow from the shell to the outside, preventing the outside air from carrying impurities into the shell and contaminating the material, thereby ensuring that the material is not contaminated.

[0023] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0025] Figure 1A schematic structural diagram from one perspective of one embodiment of a material transfer vehicle provided in an embodiment of the present application;

[0026] Figure 2 A schematic structural diagram from two perspectives of one embodiment of a material transfer vehicle provided in an embodiment of the present application;

[0027] Figure 3 A schematic structural diagram of another embodiment of a material transfer vehicle provided in an embodiment of the present application from three perspectives;

[0028] Figure 4 A schematic structural diagram of another embodiment of a material transfer vehicle provided in an embodiment of the present application from four perspectives;

[0029] Figure 5 for Figure 4 Cross-sectional view along the DD direction.

[0030] icon:

[0031] 100-transfer vehicle body;

[0032] 200-housing; 210-storage layer; 220-material conveying part;

[0033] 300-air supply assembly; 310-air pump; 320-air duct; 330-branch pipe; 340-exhaust hole;

[0034] 410-lifting soft curtain; 420-guide rail;

[0035] 500-Observation window. DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0037] In the description of this application, it should be noted that the terms "inner" and "outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0038] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0039] An embodiment of the present application provides a material transfer vehicle, which includes a transfer vehicle body 100 , a shell 200 and an air supply assembly 300 .

[0040] Exemplarily, a motion assembly is provided on the transport vehicle body 100, and the motion assembly is used to drive the transport vehicle body 100 to move and turn. Exemplarily, the motion assembly includes a motor and wheels, and the wheels are rotatably mounted on the transport vehicle body 100. The motor drives the wheels to rotate to drive the transport vehicle body 100 to move or turn; of course, the motion assembly can also be configured in other forms.

[0041] The housing 200 can store materials. The movement of the transfer vehicle body 100 drives the housing 200 to move, and the housing 200 moves to transport materials.

[0042] like Figure 1 As shown, the housing 200 is disposed on the transport vehicle body 100, and a material channel is provided on one end face of the housing 200, and the other end faces of the housing 200 are closed. For example, material can enter the housing 200 through the material channel, and the material in the housing 200 can be discharged from the housing 200 through the material channel.

[0043] like Figure 2 As shown, the air supply component 300 is arranged on the shell 200. The air supply component 300 can filter and purify the external air and then transport it into the shell 200. When the material channel is opened or closed, the air supply component 300 can maintain a positive air pressure inside the shell 200, that is, the air supply component 300 can make the air pressure inside the shell 200 greater than the air pressure outside the shell 200. If the outside air has been polluted and impurities are mixed in the air, since the air pressure inside the shell 200 remains positive, the gas in the shell 200 will flow to the outside to prevent the external gas from carrying impurities into the shell 200 and contaminating the material inside the shell 200.

[0044] like Figure 2 As shown, the air delivery assembly 300 includes an air pump 310 and a filter.

[0045] The air pump 310 is used to transport external air into the shell 200. Regardless of whether the material channel is open or closed, the air pump 310 can maintain positive air pressure inside the shell 200. The gas in the shell 200 always flows to the outside, thereby maintaining unidirectional gas flow.

[0046] The filter element is arranged at the air inlet of the air pump 310 and is used to filter the gas inhaled by the air pump 310. The air pump 310 passes the gas filtered by the filter element into the shell 200 to keep the air in the shell 200 always clean, thereby preventing the material in the shell 200 from being contaminated.

[0047] The present application filters the gas inhaled by the air pump 310 through the filter element, and the air pump 310 passes the filtered gas into the shell 200, so that the gas in the shell 200 maintains a positive pressure, and then the gas maintains a single flow direction from the shell 200 to the outside, preventing the outside air from carrying impurities into the shell 200 to contaminate the material, thereby ensuring that the material is not contaminated.

[0048] In one embodiment, the air delivery assembly 300 further includes a controller and an air pressure differential sensor.

[0049] The controller is electrically connected to the air pump 310, and the controller can control the start and stop of the air pump 310; the controller is, for example, a central processing unit (CPU), a programmable logic control unit (PLC) or an electronic device with logic control function.

[0050] The air pressure differential sensor is electrically connected to the controller. It measures the pressure difference between two points in a gas system. It detects the air pressure differential P between the outside world and the interior of housing 200 and converts the result into an electrical signal, which is transmitted to the controller. The controller then adjusts the power of the air pump 310 based on the magnitude of the air pressure differential P. Exemplarily, the air pressure differential sensor includes a first air pressure sensor and a second air pressure sensor, both electrically connected to the controller. The first air pressure sensor is located outside housing 200 and detects the air pressure outside housing 200, converting the result into an electrical signal and transmitting it to the controller. The second air pressure sensor is located inside housing 200 and detects the air pressure inside housing 200, converting the result into an electrical signal and transmitting it to the controller. The controller calculates the difference between the air pressure measured by the second air pressure sensor and the air pressure measured by the first air pressure sensor; this difference is the air pressure differential P. Real-time monitoring and feedback from the air pressure differential sensor enables the controller to promptly detect and address air pressure anomalies, thereby improving the reliability and safety of the device.

[0051] When P≤A, the controller increases the power of the air pump 310 to increase the amount of gas introduced into the shell 200 by the air pump 310 per unit time, thereby maintaining a positive pressure in the shell 200, which helps prevent external impurities or gases from entering the shell 200 and protect internal equipment or samples from contamination.

[0052] When A<P≤B, the controller enables the air pump 310 to maintain the existing power, which not only ensures the stability of the positive pressure in the housing 200 but also avoids unnecessary energy consumption.

[0053] When B < P, the controller reduces the power of air pump 310, maintaining the necessary positive pressure within housing 200 while allowing air pump 310 to operate at a reasonable power level, thus saving energy. Precisely controlling the power of air pump 310 prevents damage to housing 200 or materials caused by excessive pressure, and prevents the intrusion of foreign matter caused by insufficient pressure.

[0054] Wherein, A is the first preset air pressure difference, B is the second preset air pressure difference, C is the third preset air pressure difference, and A<B<C.

[0055] Exemplarily, the first preset air pressure value A, the second preset air pressure value B, and the third preset air pressure value C are discrete values ​​or range values.

[0056] Exemplarily, the first preset air pressure value A is equal to one standard atmospheric pressure value, the second preset air pressure value B is equal to 1.1 standard atmospheric pressure values, and the third preset air pressure value C is equal to 1.3 standard atmospheric pressure values.

[0057] In another embodiment, the first preset air pressure value A is equal to 1.05 standard atmospheric pressure values, the second preset air pressure value B is equal to 1.1 standard atmospheric pressure values, and the third preset air pressure value C is equal to 1.25 standard atmospheric pressure values.

[0058] In one embodiment, the filter element includes a primary filter unit with a 5μm pore size, effectively filtering out dust particles larger than 5μm, pollen, hair, and other impurities in the air. This is of great significance for improving indoor air quality and protecting sensitive equipment and process environments.

[0059] Illustratively, the primary filter unit includes but is not limited to: filter cotton or melt-blown filter mesh, etc.

[0060] In the filter element, the first-stage filter unit usually acts as a pre-filter, which can remove larger impurities in advance, reduce the burden on subsequent filter units, and extend their service life.

[0061] If large particles of impurities in the air are not pre-filtered, they may directly enter the interior of the housing 200, causing the material to be contaminated. The provision of a primary filtration unit can effectively reduce this risk.

[0062] In one embodiment, the filter element further includes a secondary filter unit, the filter pores of the secondary filter unit are 0.5 μm, and the secondary filter unit can filter out dust particles with a particle size greater than 0.5 μm and various suspended matter in the gas;

[0063] The primary filter unit and the secondary filter unit are sequentially arranged along the gas flow direction, and the primary filter unit and the secondary filter unit filter the gas in sequence.

[0064] The primary filter acts as a pre-filter, removing larger dust particles, hair, and other impurities from the air, effectively reducing the burden on the secondary filter. The secondary filter further precisely filters the air, with a 0.5μm pore size, ensuring that dust particles larger than 0.5 microns and various suspended solids are removed, thereby improving overall filtration efficiency and precision.

[0065] Through the pretreatment of the primary filter unit, the large particle impurities entering the secondary filter unit are reduced, the premature failure of the secondary filter unit due to blockage is avoided, and its service life is extended.

[0066] The precise secondary filtration unit can ensure the quality of gas entering subsequent equipment and reduce the contamination of materials.

[0067] like Figure 2 As shown, in one embodiment, the air supply component 300 also includes an air duct 320, one end of the air duct 320 is connected to the air outlet of the air pump 310, and the other end of the air duct 320 is arranged inside the shell 200, and the air extracted by the air pump 310 is passed into the shell 200 through the air duct 320.

[0068] The air duct 320 serves as a dedicated channel for gas transmission, which can ensure that the airflow generated by the air pump 310 is directly and efficiently transmitted to the interior of the shell 200, reducing the loss and leakage of the airflow during the transmission process, thereby improving the gas transmission efficiency.

[0069] The design of air duct 320 allows for precise control of the direction of gas flow, ensuring uniform gas distribution within housing 200. This helps reduce dead spots and eddy currents within the device. Furthermore, uniform gas distribution reduces pressure and temperature gradients within housing 200, helping to maintain a stable internal environment within housing 200 and enabling better storage of materials during transport.

[0070] like Figure 2 or Figure 4 As shown, in one embodiment, the air duct 320 includes two or more branch pipes 330 , which are spaced apart in the shell 200 and arranged on a side of the inner wall of the shell 200 away from the material channel.

[0071] For example, the number of branch pipes 330 is two. In another embodiment, Figure 2 or Figure 4In the embodiment shown, the number of branch pipes 330 is three. In another embodiment, the number of branch pipes 330 is five. In another embodiment, the number of branch pipes 330 is seven.

[0072] By delivering gas into the housing 200 through multiple branch pipes 330, multi-point distribution of gas can be achieved, making the gas more uniform within the housing 200. Multiple branch pipes 330 can increase the contact area between the gas and the material inside the housing 200, thereby improving the efficiency of gas exchange.

[0073] The design of multiple branch pipes 330 can disperse airflow noise and reduce the noise level when the equipment is running.

[0074] like Figure 2 or Figure 4 As shown, in one embodiment, a plurality of exhaust holes 340 are provided on the branch pipe 330. For example, three exhaust holes 340 are provided on one branch pipe 330. In another embodiment, ten exhaust holes 340 are provided on one branch pipe 330. In another embodiment, fifteen exhaust holes 340 are provided on one branch pipe 330.

[0075] like Figures 1 to 3 As shown, in one embodiment, at least two storage layers 210 are provided in the housing 200 .

[0076] For example, a storage layer 210 is provided in the housing 200. In another embodiment, Figures 1 to 3 As shown, two storage layers 210 are provided in the housing 200. In another embodiment, three storage layers 210 are provided in the housing 200. In another embodiment, four storage layers 210 are provided in the housing 200. The provision of the storage layers 210 can increase the material holding capacity and improve the material transfer efficiency.

[0077] Exemplarily, the branch pipes 330 are evenly spaced and distributed in each storage layer 210 .

[0078] like Figure 1 and Figure 2 As shown, in one embodiment, a material conveying member 220 is provided on the storage layer 210, and the number of the material conveying member 220 is more than one. The material conveying member 220 is rotatably mounted in the housing 200. The material in the housing 200 is placed on the material conveying member 220. The rotation of the material conveying member 220 drives the material to move, thereby causing the material to enter the housing 200 or to be discharged from the housing 200.

[0079] Exemplarily, the material conveying member 220 is, for example, a conveying belt, a conveying hopper, or a conveying chain.

[0080] like Figures 3 to 5As shown, in one embodiment, the material transfer vehicle further includes a lifting soft curtain 410 and a guide rail 420 .

[0081] The lifting soft curtain 410 is provided at the material passage on the housing 200 , and the lifting soft curtain 410 can open or close the material passage.

[0082] The guide rail 420 is provided at the material passage of the housing 200, and the lifting soft curtain 410 is slidably mounted on the guide rail 420. Exemplarily, the guide rail 420 is fixedly provided in the housing 200 by welding, gluing, clamping or bolting.

[0083] Exemplarily, a flexible rack is provided on the lifting soft curtain 410, a motor is provided in the shell 200, a gear is provided on the output shaft of the motor, the gear is engaged with the flexible rack, the forward and reverse rotation of the motor drives the gear to rotate forward and reverse, the forward and reverse rotation of the gear drives the flexible rack and the lifting soft curtain 410 to move back and forth, and the lifting soft curtain 410 moves back and forth on the guide rail 420 to open or close the material channel.

[0084] like Figure 1 or Figure 3 As shown, in one embodiment, the housing 200 is provided with an observation window 500, which includes a window frame and a transparent plate. The housing 200 is provided with a window hole, which is a through hole. The window frame is provided on the window hole, and the transparent plate is provided on the window frame. Exemplarily, the transparent plate includes, but is not limited to, a glass plate, a plastic plate, or a resin plate.

[0085] It should be noted that, unless there is any conflict, the features in the embodiments of this application can be combined with each other.

[0086] The foregoing description is merely a preferred embodiment of the present application and is not intended to limit the present application. Persons skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A material transfer vehicle, characterized in that: include: Transfer vehicle body (100); A housing (200), the housing (200) being disposed on the transfer vehicle body (100), the housing (200) having a material channel; An air supply assembly (300) is provided on the housing (200). The air supply assembly (300) can filter and purify external air and then deliver it into the housing (200). When the material channel is opened or closed, the air supply assembly (300) can maintain a positive air pressure inside the housing (200). The air supply assembly (300) includes: an air pump (310), the air pump (310) being used to transport external air into the housing (200), and the air pump (310) being able to maintain positive air pressure inside the housing (200) when the material passage is opened or closed; A filter element is provided at the air inlet of the air pump (310) and is used to filter the gas inhaled by the air pump (310).

2. The material transfer vehicle according to claim 1, characterized in that: The air supply assembly (300) further includes: a controller, the controller being electrically connected to the air pump (310), and the controller being capable of controlling the start and stop of the air pump (310); an air pressure differential sensor, the air pressure differential sensor being electrically connected to the controller, the air pressure differential sensor being used to detect the air pressure differential P between the outside and the interior of the housing (200) and convert the detection result into an electrical signal and transmit it to the controller, the controller adjusting the power of the air pump (310) according to the magnitude of the air pressure differential P; When P≤A, the controller increases the power of the air pump (310); When A<P≤B, the controller enables the air pump (310) to maintain the existing power; When B<P, the controller reduces the power of the air pump (310); Wherein, A is the first preset air pressure difference, B is the second preset air pressure difference, C is the third preset air pressure difference, and A<B<C.

3. The material transfer vehicle according to claim 1, characterized in that: The filter element comprises: The primary filter unit has a filter pore size of 5 μm.

4. The material transfer vehicle according to claim 3, characterized in that: The filter element further comprises: The secondary filter unit has a filter pore of 0.5 μm. The primary filter unit and the secondary filter unit are sequentially arranged along the gas flow direction. The primary filter unit and the secondary filter unit filter the gas in sequence.

5. The material transfer vehicle according to claim 1, characterized in that: The air supply assembly (300) further includes: An air duct (320), one end of which is connected to the air outlet of the air pump (310), and the other end of which is arranged inside the housing (200), so that the air drawn by the air pump (310) enters the housing (200) through the air duct (320).

6. The material transfer vehicle according to claim 5, characterized in that: The air duct (320) includes: Branch pipes (330), the number of the branch pipes (330) is more than two, the branch pipes (330) are distributed at intervals in the shell (200), and the branch pipes (330) are arranged on a side of the inner wall of the shell (200) away from the material channel.

7. The material transfer vehicle according to claim 6, characterized in that: The branch pipe (330) is provided with a plurality of exhaust holes (340).

8. The material transfer vehicle according to claim 1, characterized in that: At least two storage layers (210) are provided in the housing (200).

9. The material transfer vehicle according to claim 8, characterized in that: A material conveying member (220) is provided on the storage layer (210), and the number of the material conveying member (220) is more than one.

10. The material transfer vehicle according to any one of claims 1 to 9, characterized in that: Also includes: a lifting soft curtain (410), the lifting soft curtain (410) being arranged at the material passage on the housing (200), and the lifting soft curtain (410) being capable of opening or closing the material passage; A guide rail (420) is provided at the material passage of the housing (200), and the lifting soft curtain (410) is slidably mounted on the guide rail (420).

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