Solar cell workshop liquid supply system

Abstract

The utility model discloses a liquid supply system for a solar cell workshop, which comprises one or more workshop subsystems, and each workshop subsystem comprises a liquid using terminal, a liquid supplying terminal, a liquid supplying terminal and a liquid supplying terminal, each pressure tank is provided with a gas inlet, a liquid supply port and a liquid supplementing port, the gas inlet is communicated with a power gas source, and the liquid supply port is communicated with the liquid using terminal; the normal pressure tank is respectively communicated with the two liquid supplementing ports through a pumping device; and the alternating device is respectively connected with the liquid using terminal, the normal pressure tank and the two pressure tanks, and the alternating device is configured to enable the two pressure tanks to alternately supply liquid to the liquid using terminal. The solar cell workshop liquid supply system provided by the embodiment of the utility model has the advantages of stable and reliable liquid supply and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cell manufacturing, in particular to a solar cell workshop liquid supply system. Background Art

[0002] During the manufacturing process of solar cells or silicon wafers, chemicals are needed for cleaning and processing. The solar cell workshop supplies the required chemicals to the liquid terminal through the liquid supply system.

[0003] The solar cell workshop liquid supply system in the related art supplies liquid to the liquid-using terminals in the workshop through mechanical pumping devices such as diaphragm pumps or bellows pumps, but the supply flow rate is low, and it is difficult to ensure stable supply when multiple liquid-using terminals in the workshop use liquid at the same time. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a solar cell workshop liquid supply system, which has the advantages of stable and reliable liquid supply.

[0005] To achieve the above-mentioned purpose, according to an embodiment of the utility model, a solar cell workshop liquid supply system is proposed, the solar cell workshop liquid supply system includes one or more workshop subsystems, each of the workshop subsystems includes: a liquid terminal; two pressure tanks, each of the pressure tanks is provided with a gas inlet, a liquid supply port and a liquid replenishing port, the gas inlet is connected to a power gas source, and the liquid supply port is connected to the liquid terminal; a normal pressure tank, the normal pressure tank is connected to the two liquid replenishing ports respectively through a pumping device; an alternating device, the alternating device is respectively connected to the liquid terminal, the normal pressure tank and the two pressure tanks, and the alternating device is constructed to enable the two pressure tanks to alternately supply liquid to the liquid terminal.

[0006] The solar cell workshop liquid supply system according to the embodiment of the utility model has the advantages of stable and reliable liquid supply.

[0007] In addition, the solar cell workshop liquid supply system according to the above embodiment of the utility model may also have the following additional technical features:

[0008] According to one embodiment of the utility model, the two pressure tanks of each workshop subsystem are respectively a first pressure tank and a second pressure tank, the first pressure tank is provided with a first liquid supply port and a first liquid replenishment port, the second pressure tank is provided with a second liquid supply port and a second liquid replenishment port, the alternating device disconnects the first liquid supply port from the liquid usage terminal, connects the first liquid replenishment port with the normal pressure tank, and connects the second liquid supply port with the liquid usage terminal when the liquid level of the first pressure tank is less than or equal to a predetermined low liquid level, the alternating device disconnects the second liquid supply port from the liquid usage terminal, connects the second liquid replenishment port with the normal pressure tank, and connects the first liquid supply port with the liquid usage terminal when the liquid level of the second pressure tank is less than or equal to a predetermined low liquid level.

[0009] According to one embodiment of the present utility model, the alternating device disconnects the first liquid replenishing port and the atmospheric pressure tank when the liquid level of the first pressure tank is greater than or equal to a predetermined high liquid level, and the alternating device disconnects the second liquid replenishing port and the atmospheric pressure tank when the liquid level of the second pressure tank is greater than or equal to a predetermined high liquid level.

[0010] According to an embodiment of the utility model, the pumping device includes a main pump and a backup pump.

[0011] According to an embodiment of the utility model, the solar cell workshop liquid supply system further comprises an alarm device, and the alarm device is used to issue an alarm prompt when the main delivery pump fails.

[0012] According to an embodiment of the present utility model, there are two workshop subsystems, namely a first workshop subsystem and a second workshop subsystem.

[0013] According to one embodiment of the utility model, the pumping device of the first workshop subsystem and the pumping device of the second workshop subsystem are connected by a series on-off valve, and the series on-off valve opens when one of the pumping device of the first workshop subsystem and the pumping device of the second workshop subsystem fails.

[0014] According to an embodiment of the utility model, the two atmospheric pressure tanks are connected to each other so that the liquid levels of the two atmospheric pressure tanks remain equal.

[0015] According to an embodiment of the utility model, the solar cell workshop liquid supply system also includes a tank truck filling device, which is respectively connected to the two atmospheric pressure tanks and is suitable for connecting to a liquid transport vehicle.

[0016] According to an embodiment of the present invention, the power gas source is a 5N nitrogen gas source.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 It is a structural schematic diagram of a solar cell workshop liquid supply system according to an embodiment of the utility model.

[0020] Figure 2 It is a partial structural schematic diagram of a solar cell workshop liquid supply system according to an embodiment of the utility model.

[0021] Figure 3 The utility model is a schematic diagram of the structure of a pressure tank of a solar cell workshop liquid supply system according to an embodiment of the utility model.

[0022] Figure numerals: solar cell workshop liquid supply system 1, liquid terminal 10, pressure tank 20, first pressure tank 21, second pressure tank 22, gas inlet 23, liquid supply port 24, liquid replenishing port 25, atmospheric pressure tank 30, pumping device 40, main pump 41, standby pump 42, tank truck filling device 50, series on-off valve 60, first workshop 2, second workshop 3, liquid transport vehicle 4. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The solar cell workshop liquid supply system 1 according to an embodiment of the utility model is described below with reference to the accompanying drawings.

[0027] like Figure 1-Figure 3 As shown, the solar cell workshop liquid supply system 1 according to the embodiment of the utility model includes one or more workshop subsystems.

[0028] Each of the workshop subsystems comprises a liquid terminal 10, two pressure tanks 20, a normal pressure tank 30 and an alternating device.

[0029] Specifically, the solar cell workshop liquid supply system 1 can be applied to a cell wafer factory or a silicon wafer factory having one or more workshops. Each workshop can have a plurality of liquid terminals 10 .

[0030] Each pressure tank 20 is provided with a gas inlet 23, a liquid supply port 24 and a liquid replenishment port 25. The gas inlet 23 is connected to the power gas source, and the liquid supply port 24 is connected to the liquid terminal 10. The atmospheric pressure tank 30 is respectively connected to the two liquid replenishment ports 25 through a pumping device 40. The alternating device is respectively connected to the liquid terminal 10, the atmospheric pressure tank 30 and the two pressure tanks 20, and the alternating device is configured so that the two pressure tanks 20 alternately supply liquid to the liquid terminal 10.

[0031] Specifically, the power gas source fills the pressure tank 20 with power gas through the gas inlet 23 to pressurize the pressure tank 20, and provides power for the liquid supply port 24 of the pressure tank 20 to supply liquid to the liquid user terminal 10. The power gas source can fill the pressure tank 20 with power gas when the pressure in the pressure tank 20 is less than or equal to the predetermined pressure, and stop filling the power gas when the pressure is greater than or equal to the predetermined pressure.

[0032] The alternating device is constructed to stop supplying liquid to the liquid terminal 10 when the liquid level of one of the two pressure tanks 20 is less than or equal to a predetermined low liquid level, and replenish the pressure tank 20 with liquid by the atmospheric pressure tank 30 and the pumping device 40, while switching to the other pressure tank 20 to supply liquid to the liquid terminal 10.

[0033] It should be understood that the alternating device can be implemented by a liquid level detection device, an on-off valve, a programmable controller, and other devices. For example, the alternating device may include a liquid level sensor, an on-off valve, and a programmable controller. Each pressure tank 20 is provided with the liquid level sensor, an on-off valve is connected between each liquid supply port 24 and the liquid terminal 10, and an on-off valve is connected between each liquid replenishing port 25 and the atmospheric pressure tank 30. The programmable controller is electrically connected to the on-off valve and the liquid level sensor, respectively, so as to detect the liquid level and control the opening and closing of the on-off valve to realize the alternating liquid supply of the two pressure tanks 20.

[0034] According to the solar cell workshop liquid supply system 1 of the embodiment of the utility model, by utilizing power gas to provide power for the pressure tank 20 to supply liquid to the liquid terminal 10, the flow rate of the liquid supply can be increased compared with the method of relying solely on a mechanical pump for liquid supply in the related art, ensuring that the liquid terminal 10 has a large flow rate of liquid demand or a plurality of liquid terminals 10 use liquid at the same time. The liquid supply stability and reliability of the solar cell workshop liquid supply system 1 are improved, thereby facilitating the improvement of the production efficiency of the solar cell panels or silicon wafers in the workshop.

[0035] Furthermore, since the direct power source for the liquid supply of the solar cell workshop liquid supply system 1 is provided by the power gas source rather than a mechanical pump, the pumping device 40 is only used to replenish the pressure tank 20. Compared with the technical solution in the related art that only relies on a mechanical pump to provide power for the liquid supply, the frequency of use of the mechanical pump can be reduced, making it less likely for the mechanical pump to be corroded due to long-term use and cause chemical contamination, thereby reducing the maintenance cost of the mechanical pump and reducing the chance of maintenance personnel coming into contact with chemicals.

[0036] In addition, by setting up a pressure tank 20, two pressure tanks 20 and the alternating device, the two pressure tanks 20 are used to alternately supply liquid, and the normal pressure tank 30 is used to replenish liquid in the pressure tank 20 with a low liquid level. When the liquid level in one pressure tank 20 is low, the liquid supply can be stopped for replenishment and the other pressure tank 20 can be switched to supply liquid at the same time, thereby achieving seamless switching of liquid supply, avoiding the situation where the liquid cannot be supplied while waiting for replenishment, and further ensuring the stability of the liquid supply, thereby further facilitating the improvement of the production efficiency of the workshop.

[0037] Therefore, the solar cell workshop liquid supply system 1 according to the embodiment of the utility model has the advantages of stable and reliable liquid supply.

[0038] The following describes a solar cell workshop liquid supply system 1 according to a specific embodiment of the utility model with reference to the accompanying drawings.

[0039] In some specific embodiments of the present invention, Figure 1-Figure 3 As shown, the solar cell workshop liquid supply system 1 according to the embodiment of the utility model comprises one or more workshop subsystems. Each of the workshop subsystems comprises a liquid terminal 10, two pressure tanks 20, a normal pressure tank 30 and an alternating device.

[0040] Specifically, Figure 2 As shown, the two pressure tanks 20 of each of the workshop subsystems are respectively a first pressure tank 21 and a second pressure tank 22, the first pressure tank 21 is provided with a first liquid supply port and a first liquid replenishing port, the second pressure tank 22 is provided with a second liquid supply port and a second liquid replenishing port, the alternating device disconnects the first liquid supply port from the liquid terminal 10, connects the first liquid replenishing port with the atmospheric pressure tank 30, and connects the second liquid supply port with the liquid terminal 10 when the liquid level of the first pressure tank 21 is less than or equal to a predetermined low liquid level, disconnects the second liquid supply port from the liquid terminal 10, connects the second liquid replenishing port with the atmospheric pressure tank 30, and connects the first liquid supply port with the liquid terminal 10 when the liquid level of the second pressure tank 22 is less than or equal to a predetermined low liquid level. Specifically, the alternating device may include an on-off valve, a liquid level sensor and a programmable controller. The liquid level sensor is provided in the pressure tank 20, an on-off valve is connected between the liquid supply port 24 and the liquid terminal 10, an on-off valve is connected between the liquid replenishment port 25 and the atmospheric pressure tank 30, and the programmable controller is electrically connected to the pumping device 40, the on-off valve and the liquid level sensor, respectively. In this way, the alternating liquid supply of the two pressure tanks 20 can be achieved, the liquid supply interruption can be avoided, and the liquid supply can be ensured to be stable.

[0041] More specifically, Figure 2 As shown, the alternating device disconnects the first liquid replenishing port from the atmospheric pressure tank 30 when the liquid level of the first pressure tank 21 is greater than or equal to the predetermined high liquid level, and disconnects the second liquid replenishing port from the atmospheric pressure tank 30 when the liquid level of the second pressure tank 22 is greater than or equal to the predetermined high liquid level. In this way, liquid replenishment can be stopped when the liquid in the pressure tank 20 reaches the predetermined high liquid level, preventing the liquid level in the pressure tank 20 from being too high.

[0042] Specifically, the programmable controller operates the pumping device 40 when the liquid level of any one of the two pressure tanks 20 is less than or equal to a predetermined low liquid level, and stops the pumping device 40 when the liquid levels of the two pressure tanks 20 are greater than or equal to a predetermined high liquid level. In this way, the pumping device 40 can be operated only when liquid replenishment is required, reducing the frequency of use of the pumping device 40 and further reducing maintenance costs.

[0043] Advantageously, if Figure 1 and Figure 2 As shown, the pumping device 40 includes a main pump 41 and a backup pump 42. In this way, the main pump 41 can be mainly used to replenish the pressure tank 20, and the backup pump 42 can be used to replenish the pressure tank 20 when the main pump 41 fails. The main pump 41 can be repaired by maintenance personnel, and the main pump 41 can be used to replenish the pressure tank 20 again after the main pump 41 is repaired. In this way, it can be avoided that the pressure tank 20 cannot be replenished with liquid due to the failure of the main pump 41, thereby further improving the stability and reliability of the liquid supply.

[0044] Specifically, the main pump 41 and the backup pump 42 may both be magnetic pumps.

[0045] More advantageously, the solar cell workshop liquid supply system 1 further comprises an alarm device, which is used to issue an alarm prompt when the main pump 41 fails. Specifically, the alarm device can issue a sound prompt or a light prompt, or can issue a sound and a light prompt at the same time. In this way, the maintenance personnel can be prompted to repair the failed main pump 41 in time.

[0046] Figure 1 and Figure 2 The solar cell workshop liquid supply system 1 according to some examples of the utility model is shown. Figure 1 As shown, there are two workshop subsystems, namely a first workshop subsystem and a second workshop subsystem.

[0047] Advantageously, if Figure 1 and Figure 2 As shown, the pumping device 40 of the first workshop subsystem and the pumping device 40 of the second workshop subsystem are connected through a series on-off valve 60, and the series on-off valve 60 is opened when one of the pumping devices 40 of the first workshop subsystem and the pumping device 40 of the second workshop subsystem fails. In this way, when the pumping device 40 of one of the two workshop subsystems fails completely, the series on-off valve 60 can be opened to connect the two pumping devices 40 in series, and the pumping device 40 that has not failed can replenish the pressure tank 20 of the workshop subsystem where the pumping device 40 fails. For example, when the main pump 41 and the standby pump 42 of one workshop subsystem fail, the main pump 41 of the other workshop subsystem can replenish the pressure tank 20 of the workshop subsystem where the pumping device 40 fails through the opened series on-off valve 60. In this way, not only can the two workshops be supplied with liquid respectively, but also when the pumping device 40 of one workshop fails, it can be switched to the pumping device 40 of another workshop, further avoiding interruption of liquid supply and ensuring reliable liquid supply.

[0048] Specifically, Figure 1 and Figure 2 As shown, the solar cell workshop liquid supply system 1 also includes a tank truck filling device 50, which is connected to the two atmospheric pressure tanks 30 respectively, and the tank truck filling device 50 is suitable for connecting to the liquid transport vehicle 4. In this way, the liquid transport vehicle 4 can replenish liquid into the two atmospheric pressure tanks 30 through the tank truck filling device 50.

[0049] Specifically, a liquid level sensor is provided in the atmospheric pressure tank 30. When the liquid level of the atmospheric pressure tank 30 reaches a predetermined low level, an alarm is issued to remind the operator to replenish liquid. When the liquid level of the atmospheric pressure tank 30 is higher than a predetermined high level, the tank truck filling device 50 stops replenishing liquid to the atmospheric pressure tank 30 to prevent overfilling.

[0050] Optionally, the two atmospheric pressure tanks 30 are interconnected to keep the liquid levels of the two atmospheric pressure tanks 30 equal. This can ensure that both atmospheric pressure tanks 30 have liquid chemicals, and avoid replenishing only one atmospheric pressure tank 30 while the other atmospheric pressure tank 30 is not replenished.

[0051] Therefore, through the above-mentioned multiple interlocking controls, continuous, uninterrupted, reliable and stable liquid supply can be achieved.

[0052] Advantageously, the power gas source is a 5N nitrogen gas source, which can prevent the power gas from reacting with the liquid chemicals, prevent the liquid chemicals from being contaminated by impurities in the power gas, and further improve the reliability of liquid supply.

[0053] Specifically, the pressure tank 20 may be a carbon steel tank with an inner wall having a polytetrafluoroethylene coating or a fusible polytetrafluoroethylene (PFA) material to prevent corrosion by chemicals.

[0054] The volume of the atmospheric pressure tank 30 can be 40-60 cubic meters, preferably 50 cubic meters.

[0055] like Figure 3 As shown, the gas inlet 23 and the liquid replenishing port 25 can be arranged at the upper end of the pressure tank 20 and the liquid supply port 24 can be arranged at the lower end of the pressure tank 20 (the up and down directions are shown by the arrows in the figure). This can facilitate the liquid supply and replenishment of the pressure tank 20.

[0056] Other structures and operations of the solar cell workshop liquid supply system 1 according to the embodiment of the utility model are known to ordinary technicians in the field and will not be described in detail here.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0058] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A solar cell workshop liquid supply system, characterized in that: It includes one or more workshop subsystems, each of which includes: Liquid terminal; Two pressure tanks, each of which is provided with a gas inlet, a liquid supply port and a liquid replenishing port, the gas inlet is connected to a power gas source, and the liquid supply port is connected to the liquid using terminal; A normal pressure tank, the normal pressure tank is connected to the two liquid infusion ports respectively through a pumping device; An alternating device is respectively connected to the liquid-using terminal, the atmospheric pressure tank and the two pressure tanks, and the alternating device is constructed so that the two pressure tanks alternately supply liquid to the liquid-using terminal.

2. The solar cell workshop liquid supply system according to claim 1, characterized in that: The two pressure tanks of each workshop subsystem are respectively a first pressure tank and a second pressure tank, the first pressure tank is provided with a first liquid supply port and a first liquid replenishment port, the second pressure tank is provided with a second liquid supply port and a second liquid replenishment port, the alternating device disconnects the first liquid supply port from the liquid terminal, connects the first liquid replenishment port with the normal pressure tank, and connects the second liquid supply port with the liquid terminal when the liquid level of the first pressure tank is less than or equal to a predetermined low liquid level, disconnects the second liquid supply port from the liquid terminal, connects the second liquid replenishment port with the normal pressure tank, and connects the first liquid supply port with the liquid terminal when the liquid level of the second pressure tank is less than or equal to a predetermined low liquid level.

3. The solar cell workshop liquid supply system according to claim 2, characterized in that: The alternating device disconnects the first liquid replenishing port and the atmospheric pressure tank when the liquid level of the first pressure tank is greater than or equal to a predetermined high liquid level, and the alternating device disconnects the second liquid replenishing port and the atmospheric pressure tank when the liquid level of the second pressure tank is greater than or equal to a predetermined high liquid level.

4. The solar cell workshop liquid supply system according to claim 1, characterized in that: The pumping device comprises a main pump and a standby pump.

5. The solar cell workshop liquid supply system according to claim 4, characterized in that: It also includes an alarm device, which is used to issue an alarm prompt when the main delivery pump fails.

6. The solar cell workshop liquid supply system according to claim 1, characterized in that: There are two workshop subsystems, namely a first workshop subsystem and a second workshop subsystem.

7. The solar cell workshop liquid supply system according to claim 6, characterized in that: The pumping device of the first workshop subsystem and the pumping device of the second workshop subsystem are connected via a series on-off valve, and the series on-off valve opens when one of the pumping device of the first workshop subsystem and the pumping device of the second workshop subsystem fails.

8. The solar cell workshop liquid supply system according to claim 6, characterized in that: The two atmospheric pressure tanks are connected to each other so that the liquid levels of the two atmospheric pressure tanks are kept equal.

9. The solar cell workshop liquid supply system according to claim 6, characterized in that: It also includes a tank truck filling device, which is connected to the two atmospheric pressure tanks respectively and is suitable for connecting to a liquid transport vehicle.

10. The solar cell workshop liquid supply system according to claim 1, characterized in that: The power gas source is a 5N nitrogen gas source.

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