An automated wine pipeline delivery system

Abstract

This utility model relates to an automated wine pipeline conveying system, including a wine tank and a finished wine tank, as well as a buffer tank, a first conveying pipeline, a second conveying pipeline, and an air-blowing pipeline. The inlet of the buffer tank is connected to the wine tank via the first conveying pipeline, and the outlet of the buffer tank is connected to the inlet of the finished wine tank via the second conveying pipeline. The air-blowing pipeline is connected to the first and second conveying pipelines and introduces a purging airflow into them. This utility model uses the buffer tank to buffer the conveyed wine, ensuring conveying efficiency. The wine in the wine tank is conveyed to the buffer tank for temporary storage via the first conveying pipeline, and then the temporarily stored wine is conveyed to the finished wine tank for storage via the second conveying pipeline, eliminating the need for manual transfer and avoiding wine spillage and waste. When the wine is not being transferred, the air-blowing pipeline can be used to purge any remaining wine inside the first and second conveying pipelines, achieving the recovery of residual wine.

Description

Technical Field

[0001] This utility model relates to the field of liquor brewing technology, specifically to an automated liquor pipeline conveying system. Background Technology

[0002] Baijiu is a type of liquor made from starchy (saccharide) raw materials through processes such as cooking, saccharification, fermentation, distillation, aging, and blending. After brewing, the liquor in the brewing vats needs to be transferred to finished liquor tanks for storage. However, due to the large size of the finished liquor tanks, they cannot be placed near the brewing vats, thus requiring the liquor to be transported.

[0003] Traditional transport methods require manual loading of the wine into barrels and then unloading and pouring it into finished wine tanks. Due to the long distances involved, spillage or overflow often occurs during barrel transport and unloading, resulting in waste and high labor intensity. Alternatively, transporting the wine through pipelines is also problematic, as the long pipelines leave behind a significant amount of wine that is difficult to recover, leading to further waste. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by providing an automated wine pipeline transportation system that improves wine transfer efficiency, reduces labor intensity, and allows for wine recycling, thus significantly reducing wine transfer losses.

[0005] This utility model is achieved through the following technical solution: an automated wine pipeline conveying system, including a wine tank and a finished wine tank, and further including a buffer tank, a first conveying pipeline, a second conveying pipeline and an air blowing pipeline. The inlet of the buffer tank is connected to the wine tank through the first conveying pipeline, and the outlet of the buffer tank is connected to the inlet of the finished wine tank through the second conveying pipeline. The air blowing pipeline is connected to the first conveying pipeline and the second conveying pipeline and introduces a purging airflow into the first conveying pipeline and the second conveying pipeline.

[0006] This solution addresses the long path between the wine tank and the finished wine tank by installing a buffer tank between them to prevent low flow rates due to the long path, thus ensuring efficient and stable transport. The wine from the wine tank is temporarily stored in the buffer tank via a first transport pipeline, and then transferred to the finished wine tank via a second transport pipeline. This eliminates the need for manual transfer, preventing spillage and waste, improving transport efficiency, and reducing labor. When not transporting wine, a purge airflow can be used through the first and second transport pipelines to remove any remaining wine, allowing for recovery and further preventing waste and increasing production.

[0007] As an optimization, the first delivery pipeline includes a first inlet pipe, a first delivery pump, a first connecting pipe, and a first outlet pipe connected in sequence. The first inlet pipe is inserted into the wine tank, and the first outlet pipe is connected to the inlet of the buffer tank. A first solenoid valve and a second solenoid valve are respectively installed at the input and output ends of the first connecting pipe. This optimized solution uses the first delivery pump to pump the wine from the wine tank to the buffer tank, and the first and second solenoid valves provide more precise control over the flow rate of the wine, making it more convenient to use.

[0008] As an optimization, the inlet of the buffer tank is located at the top of the buffer tank, and the first drain pipe is a flexible hose, which is inserted into the buffer tank through the inlet. This optimized solution uses a flexible hose for the first drain pipe, making it easy to place and remove. The first drain pipe is inserted into the bottom of the buffer tank, thereby ensuring a stable output of the liquid and preventing splashing of the liquid from inside the buffer tank to the outside during output.

[0009] As an optimization, the first delivery pipeline also includes a first return pipe. The output end of the first return pipe is connected to the return port of the buffer tank, and the input end of the first return pipe is connected to the output end of the first connecting pipe. A third solenoid valve and a first pressure relief valve are installed on the first return pipe, and the third solenoid valve and the first pressure relief valve are distributed along the direction of liquid return. In this optimized scheme, the residual liquid in the first connecting pipe purged by the air blowing pipeline flows back to the buffer tank through the first return pipe, thereby bypassing the hose of the first drain pipe and ensuring the stability of the air blowing.

[0010] As an optimization, the second delivery pipeline includes a second inlet pipe, a second delivery pump, a second connecting pipe, and a second outlet pipe connected in sequence. The input end of the second inlet pipe is connected to the outlet of the buffer tank, and the second outlet pipe is connected to the inlet of the finished product tank. A fourth solenoid valve and a fifth solenoid valve are respectively installed at the input and output ends of the second connecting pipe. This optimized solution uses the second delivery pump to pump the liquor from the buffer tank to the finished product tank, and the fourth and fifth solenoid valves provide more precise control over the flow rate of the liquor, making it more convenient to use.

[0011] As an optimization, the inlet of the finished wine tank is located at the top of the tank, and the second drain pipe is a flexible hose inserted into the finished wine tank through the inlet. This optimized solution uses a flexible hose for the second drain pipe, making it easy to place and remove. The second drain pipe is inserted into the bottom of the finished wine tank, thereby ensuring a stable output of the wine and preventing splashing of the wine from inside the tank to the outside during output.

[0012] As an optimization, the second delivery pipeline also includes a second return pipe. The output end of the second return pipe is connected to the return port of the finished product tank, and the input end of the second return pipe is connected to the output end of the second connecting pipe. A sixth solenoid valve and a second pressure relief valve are installed on the second return pipe, and the sixth solenoid valve and the second pressure relief valve are distributed along the direction of liquid return. In this optimized scheme, residual liquid in the second connecting pipe purged by the air blowing pipeline flows back to the buffer tank through the second return pipe, thereby bypassing the hose of the second drain pipe and ensuring the stability of the air blowing.

[0013] As an optimization, the air-blowing pipeline includes an air compressor, a main air supply pipe connected to the air supply end of the air compressor, and a first branch pipe and a second branch pipe connected to the main air supply pipe. The output end of the first branch pipe is connected to the input end of the first connecting pipe, and the output end of the second branch pipe is connected to the input end of the second connecting pipe. In this optimized scheme, during air blowing, the air compressor increases the blowing airflow, and the airflow is blown into the first connecting pipe and the second connecting pipe through the first branch pipe and the second branch pipe, respectively.

[0014] As an optimization, a seventh solenoid valve, a first pressure gauge, and a first check valve are installed on the first branch pipe, and these three components are distributed along the gas delivery direction of the first branch pipe. This optimized solution prevents gas backflow through the first check valve and detects pipeline pressure through the first pressure gauge, ensuring the safety of the first branch pipe.

[0015] As an optimization, an eighth solenoid valve, a second pressure gauge, and a second check valve are installed on the second branch pipe, and these components are distributed along the gas delivery direction of the second branch pipe. This optimized solution prevents gas backflow through the second check valve and monitors the pipeline pressure through the second pressure gauge, ensuring the safety of the second branch pipe.

[0016] The beneficial effects of this utility model are as follows: Since the path between the wine pool and the finished wine tank is relatively long, a buffer tank is set between the two to buffer the transported wine liquid, preventing the wine liquid flow rate from being too low due to the excessively long path, and ensuring the transport efficiency and stability.

[0017] The wine in the wine tank is transported to a buffer tank for temporary storage via the first conveying pipeline, and then the temporarily stored wine is transported to the finished wine tank for storage via the second conveying pipeline. This eliminates the need for manual transfer, avoids wine spillage and waste, improves wine transfer efficiency, and reduces labor.

[0018] When the wine is not being transported, a purge airflow can be blown into the first and second conveying pipelines through the air blowing pipeline to purge the remaining wine inside, thereby recovering the residual wine, further preventing the loss and waste of wine, and increasing the wine production. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the process of this utility model; As shown in the figure: 1. Wine tank; 2. Buffer tank; 3. Finished wine tank; 4. First conveying pipeline; 41. First inlet pipe; 42. First conveying pump; 43. First connecting pipe; 44. First drain pipe; 45. First solenoid valve; 46. Second solenoid valve; 47. First return pipe; 48. Third solenoid valve; 49. First pressure relief valve. 5. Second delivery pipeline; 51. Second inlet pipe; 52. Second delivery pump; 53. Second connecting pipe; 54. Second drain pipe; 55. Fourth solenoid valve; 56. Fifth solenoid valve; 57. Second return pipe; 58. Sixth solenoid valve; 59. Second pressure relief valve. 6. Air blowing pipeline; 60. Air compressor; 61. Main air supply pipe; 62. First branch pipe; 63. Second branch pipe; 64. Seventh solenoid valve; 65. First pressure gauge; 66. First check valve; 67. Eighth solenoid valve; 68. Second pressure gauge; 69. Second check valve; 7. Control box. Detailed Implementation

[0020] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0021] like Figure 1 As shown, an automated wine delivery system includes a wine tank 1, a finished wine tank 3, a buffer tank 2, a first delivery pipeline 4, a second delivery pipeline 5, and an air-blowing pipeline 6. The inlet of the buffer tank 2 is connected to the wine tank 1 via the first delivery pipeline 4, and the outlet of the buffer tank 2 is connected to the inlet of the finished wine tank 3 via the second delivery pipeline 5. The air-blowing pipeline 6 is connected to the first delivery pipeline 4 and the second delivery pipeline 5, and introduces a purge airflow into the first delivery pipeline 4 and the second delivery pipeline 5.

[0022] The buffer tank 2 is located on the path between the wine pool 1 and the finished wine tank 3. Since the path between the wine pool 1 and the finished wine tank 3 is relatively long, the buffer tank 2 is set between the two to buffer the transported wine, prevent the wine flow rate from being too low due to the long path, and ensure the transport efficiency and stability.

[0023] When transporting the wine, the wine in the wine tank 1 is transported to the buffer tank 2 for temporary storage through the first transport pipeline 4, and then the temporarily stored wine is transported to the finished wine tank 3 for storage through the second transport pipeline 5. No manual transfer is required, which avoids the waste of wine splashing out, improves the efficiency of wine transfer, and reduces the amount of labor.

[0024] When the wine is not being transported, the air blowing pipe 6 can blow purge air into the first conveying pipe 4 and the second conveying pipe 5 respectively to purge the residual wine inside, thereby recovering the residual wine, further preventing the loss and waste of wine, and increasing the wine production.

[0025] Specifically, the first delivery pipeline 4 includes a first inlet pipe 41, a first delivery pump 42, a first connecting pipe 43, and a first outlet pipe 44 connected in sequence. The first delivery pump 42 is located beside the wine tank 1, and the output end of the first inlet pipe 41 is connected to the input end of the first delivery pump 42.

[0026] The first inlet pipe 41 is inserted into the wine tank 1 and extends to the bottom of the wine tank 1. The first outlet pipe 44 is connected to the inlet of the buffer tank 2. In this embodiment, the inlet of the buffer tank 2 is located at the top of the buffer tank 2. The first outlet pipe 44 is a flexible hose, inserted into the buffer tank 2 through the inlet of the buffer tank 2, and extends to the bottom of the buffer tank 2. The flexible hose of the first outlet pipe 44 facilitates easy access and is located at the bottom of the buffer tank 2, submerged below the liquid surface, thereby ensuring a stable output of the wine and preventing splashing of the wine from inside the buffer tank 2 to the outside during output. The input and output ends of the first connecting pipe 43 are respectively equipped with a first solenoid valve 45 and a second solenoid valve 46.

[0027] Specifically, the second delivery pipeline 5 includes a second inlet pipe 51, a second delivery pump 52, a second connecting pipe 53, and a second outlet pipe 54 connected in sequence. The second delivery pump 52 is located beside the buffer tank 2, and the output end of the second inlet pipe 51 is connected to the input end of the second delivery pump 52.

[0028] The input end of the second inlet pipe 51 is connected to the outlet of the buffer tank 2. In this embodiment, the outlet of the buffer tank 2 is located at the bottom of the side wall of the buffer tank 2. The second drain pipe 54 is connected to the inlet of the finished wine tank 3. In this embodiment, the inlet of the finished wine tank 3 is located at the top of the finished wine tank 3. The second drain pipe 54 is a flexible tube, which is inserted into the finished wine tank 3 through the inlet and extends to the bottom of the finished wine tank 3. The flexible tube of the second drain pipe 54 facilitates easy removal and placement. The insertion of the second drain pipe 54 into the bottom of the finished wine tank 3 ensures a stable output of the wine and prevents splashing of the wine from inside the finished wine tank 3 to the outside during output. The input and output ends of the second connecting pipe 53 are respectively equipped with a fourth solenoid valve 55 and a fifth solenoid valve 56.

[0029] Specifically, the air-blowing pipeline 6 includes an air compressor 60, a main air supply pipe 61 connected to the air supply end of the air compressor 60, and a first branch pipe 62 and a second branch pipe 63 connected to the main air supply pipe 61. The output end of the first branch pipe 62 is connected to the input end of the first connecting pipe 43, and the connection point between the first branch pipe 62 and the first connecting pipe 43 is located between the first solenoid valve 45 and the second solenoid valve 46. The output end of the second branch pipe 63 is connected to the input end of the second connecting pipe 53, and the connection point between the second branch pipe 63 and the second connecting pipe 53 is located between the fourth solenoid valve 55 and the fifth solenoid valve 56.

[0030] Since the first connecting pipe 43 and the second connecting pipe 53 are relatively long, they are prone to residual wine. Therefore, the air compressor 60 increases the purging airflow and blows airflow into the first connecting pipe 43 and the second connecting pipe 53 through the first branch pipe 62 and the second branch pipe 63 respectively, thereby blowing the residual wine in the first connecting pipe 43 and the second connecting pipe 53 to the buffer tank 2 and the finished wine tank 3 respectively.

[0031] A seventh solenoid valve 64, a first pressure gauge 65, and a first check valve 66 are installed on the first branch pipe 62. The seventh solenoid valve 64, the first pressure gauge 65, and the first check valve 66 are distributed along the gas delivery direction of the first branch pipe 62. The first check valve 66 prevents gas backflow, and the first pressure gauge 65 detects the pipeline pressure to ensure the safety of the first branch pipe 62.

[0032] An eighth solenoid valve 67, a second pressure gauge 68, and a second check valve 69 are installed on the second branch pipe 63. The eighth solenoid valve 67, the second pressure gauge 68, and the second check valve 69 are distributed along the gas delivery direction of the second branch pipe 63. The second check valve 69 prevents gas backflow, and the second pressure gauge 68 detects the pipeline pressure to ensure the safety of the second branch pipe 63.

[0033] Specifically, in this embodiment, the first delivery pipeline 4 further includes a first return pipe 47, the output end of which is connected to the return port of the buffer tank 2. The input end of the first return pipe 47 is connected to the output end of the first connecting pipe 43, and the connection point between the first return pipe 47 and the first connecting pipe 43 is located between the first solenoid valve 45 and the second solenoid valve 46. A third solenoid valve 48 and a first pressure relief valve 49 are installed on the first return pipe 47, and the third solenoid valve 48 and the first pressure relief valve 49 are distributed along the direction of liquid return. During air blowing, the first branch pipe 62 blows airflow into the first connecting pipe 43, and the residual liquid in the first connecting pipe 43 is blown into the buffer tank 2 through the first return pipe 47, thereby bypassing the first drain pipe 44 made of flexible hose material, ensuring the stability of air blowing. To prevent the airflow from causing excessive pressure inside the buffer tank 2, the pressure is automatically released through the first pressure relief valve 49.

[0034] Specifically, in this embodiment, the second delivery pipeline 5 also includes a second return pipe 57, the output end of which is connected to the return port of the finished product tank 3. The input end of the second return pipe 57 is connected to the output end of the second connecting pipe 53, and the connection point between the second return pipe 57 and the second connecting pipe 53 is located between the fourth solenoid valve 55 and the fifth solenoid valve 56. A sixth solenoid valve 58 and a second pressure relief valve 59 are installed on the second return pipe 57, and the sixth solenoid valve 58 and the second pressure relief valve 59 are distributed along the direction of liquid return. During air blowing, the second branch pipe 63 blows airflow into the second connecting pipe 53, and the residual liquid in the second connecting pipe 53 is blown into the finished product tank 3 through the second return pipe 57, thereby bypassing the second drain pipe 54 made of flexible material, ensuring the stability of air blowing. To prevent the airflow from causing excessive pressure inside the finished product tank 3, the pressure is automatically released through the second pressure relief valve 59.

[0035] The wine pipeline transportation system in this embodiment also includes a control box 7, and level gauges are installed on the wine tank 1, buffer tank 2, and finished wine tank 3. The control box 7 includes a box body and a controller, transformer, display screen, power switch, and several control buttons mounted on the box body.

[0036] The controller uses a SIMATIC S7-1200 programmable PLC controller, which provides precise control and reliable operation. The first to eighth solenoid valves 45 to 67, the first pressure gauge 65, the second pressure gauge 68, the first transfer pump 42, the second transfer pump 52, and the level gauge are all connected to the controller via signal connections.

[0037] The display screen is used to display the pressure of the purging airflow and the liquid levels in the wine tank 1, buffer tank 2, and finished wine tank 3.

[0038] The control buttons include two pump control buttons, eight valve control buttons, and one emergency stop button. The two pump control buttons control the start and stop of the first delivery pump 42 and the second delivery pump 52, respectively. The eight valve control buttons control the on / off switching of the first solenoid valve 45 to the eighth solenoid valve 67, respectively. The emergency stop button is used for protective power-off in emergency situations. Through controller programming, the opening and closing of the delivery pumps and solenoid valves, as well as flow rate regulation, can be achieved based on the liquid levels in the wine tank 1, buffer tank 2, and finished wine tank 3, making it more convenient to use.

[0039] Working principle: When conveying the wine, the third solenoid valve 48, the sixth solenoid valve 58, the seventh solenoid valve 64, and the eighth solenoid valve 67 are closed, while the first solenoid valve 45, the second solenoid valve 46, the fourth solenoid valve 55, and the fifth solenoid valve 56 are opened. The first delivery pump 42 is started, and the wine in the wine tank 1 flows sequentially through the first inlet pipe 41, the first delivery pump 42, the first connecting pipe 43, and the first drain pipe 44 before entering the buffer tank 2 for temporary storage. The second delivery pump 52 is started, and the wine in the buffer tank 2 flows sequentially through the second inlet pipe 51, the second delivery pump 52, the second connecting pipe 53, and the second drain pipe 54 before entering the finished wine tank 3 for storage.

[0040] When the level gauge in wine tank 1 shows no wine, the first delivery pump 42 is stopped, and the first solenoid valve 45 is closed to prevent wine from flowing back into wine tank 1. Simultaneously, the second solenoid valve 46 is closed, and the third solenoid valve 48 and the seventh solenoid valve 64 are opened. The air compressor 60 delivers a purging airflow to the first branch pipe 62, which purges the remaining wine in the first connecting pipe 43, causing the wine to flow into the buffer tank 2 through the first return pipe 47. After purging for a certain period, the air compressor 60 stops and closes the third solenoid valve 48 and the seventh solenoid valve 64, thus recovering the wine from the first connecting pipe 43.

[0041] As the second delivery pump 52 delivers wine, when the level gauge in the buffer tank 2 indicates no wine, the second delivery pump 52 stops, and the fourth solenoid valve 55 closes to prevent wine from flowing back into the buffer tank 2. Simultaneously, the fifth solenoid valve 56 closes, and the sixth solenoid valve 58 and the eighth solenoid valve 67 open. The air compressor 60 delivers a purging airflow to the second branch pipe 63, which purges the residual wine in the second connecting pipe 53, causing the wine to flow into the finished wine tank 3 through the second return pipe 57. After purging for a certain period, the air compressor 60 stops and closes the sixth solenoid valve 58 and the eighth solenoid valve 67, thus recovering the wine in the second connecting pipe 53.

[0042] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. An automated wine pipeline conveying system, comprising a wine tank (1) and a finished wine tank (3), characterized in that: It also includes a buffer tank (2), a first conveying pipeline (4), a second conveying pipeline (5) and an air blowing pipeline (6). The inlet of the buffer tank (2) is connected to the wine tank (1) through the first conveying pipeline (4), and the outlet of the buffer tank (2) is connected to the inlet of the finished wine tank (3) through the second conveying pipeline (5). The air blowing pipeline (6) is connected to the first conveying pipeline (4) and the second conveying pipeline (5) and introduces a purge airflow into the first conveying pipeline (4) and the second conveying pipeline (5).

2. The automated wine pipeline conveying system according to claim 1, characterized in that: The first delivery pipeline (4) includes a first inlet pipe (41), a first delivery pump (42), a first connecting pipe (43) and a first drain pipe (44) connected in sequence. The first inlet pipe (41) is inserted into the wine tank (1), and the first drain pipe (44) is connected to the inlet of the buffer tank (2). The input end and the output end of the first connecting pipe (43) are respectively equipped with a first solenoid valve (45) and a second solenoid valve (46).

3. The automated wine pipeline conveying system according to claim 2, characterized in that: The inlet of the buffer tank (2) is located at the top of the buffer tank (2), and the first drain pipe (44) is a flexible tube that is inserted into the buffer tank (2) through the inlet of the buffer tank (2).

4. The automated wine pipeline conveying system according to claim 2, characterized in that: The first delivery pipeline (4) also includes a first return pipe (47). The output end of the first return pipe (47) is connected to the return port of the buffer tank (2). The input end of the first return pipe (47) is connected to the output end of the first connecting pipe (43). A third solenoid valve (48) and a first pressure relief valve (49) are installed on the first return pipe (47). The third solenoid valve (48) and the first pressure relief valve (49) are distributed along the direction of wine return.

5. The automated wine pipeline delivery system of claim 2 or 3 or 4, wherein: The second delivery pipeline (5) includes a second inlet pipe (51), a second delivery pump (52), a second connecting pipe (53), and a second outlet pipe (54) connected in sequence. The input end of the second inlet pipe (51) is connected to the outlet of the buffer tank (2), and the second outlet pipe (54) is connected to the inlet of the finished wine tank (3). The input end and the output end of the second connecting pipe (53) are respectively equipped with a fourth solenoid valve (55) and a fifth solenoid valve (56).

6. The automated wine pipeline delivery system of claim 5, wherein: The liquid inlet of the finished wine tank (3) is located at the top of the finished wine tank (3), and the second drain pipe (54) is a flexible tube that is inserted into the finished wine tank (3) through the liquid inlet.

7. The automated wine pipeline conveying system according to claim 5, characterized in that: The second delivery pipeline (5) also includes a second return pipe (57). The output end of the second return pipe (57) is connected to the return port of the finished wine tank (3). The input end of the second return pipe (57) is connected to the output end of the second connecting pipe (53). A sixth solenoid valve (58) and a second pressure relief valve (59) are installed on the second return pipe (57). The sixth solenoid valve (58) and the second pressure relief valve (59) are distributed along the wine return direction.

8. The automated wine pipeline conveying system according to claim 7, characterized in that: The air blowing pipeline (6) includes an air compressor (60), an air supply main pipe (61) connected to the air supply end of the air compressor (60), and a first branch pipe (62) and a second branch pipe (63) connected to the air supply main pipe (61). The output end of the first branch pipe (62) is connected to the input end of the first connecting pipe (43), and the output end of the second branch pipe (63) is connected to the input end of the second connecting pipe (53).

9. The automated wine pipeline delivery system of claim 8, wherein: The first branch pipe (62) is equipped with a seventh solenoid valve (64), a first pressure gauge (65) and a first check valve (66), which are distributed along the gas delivery direction of the first branch pipe (62).

10. The automated wine pipeline delivery system of claim 8, wherein: The second branch pipe (63) is equipped with an eighth solenoid valve (67), a second pressure gauge (68), and a second check valve (69). The eighth solenoid valve (67), the second pressure gauge (68), and the second check valve (69) are distributed along the gas delivery direction of the second branch pipe (63).

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