Lithium battery slurry double-ball bidirectional pigging system

Abstract

The utility model provides a lithium battery slurry double-ball bidirectional pigging system, which relates to the technical field of pipeline cleaning of slurry conveying systems in the lithium battery industry, and comprises a sending station, a returning station, a feeding module, a conveying pipeline module and a buffer tank module, a buffer tank module is arranged on a passage of the conveying pipeline module in a matched mode, and the feeding module is located on the path of the conveying pipeline module close to the sending station. The pipeline cleaning device is suitable for lithium battery slurry conveying systems under various working conditions, is also suitable for pipeline cleaning systems with similar requirements in other industries, can effectively and efficiently clean a lithium battery slurry conveying pipeline, does not need to carry out ball releasing and ball collecting operation for a long time after a pipeline cleaning ball is placed in the pipeline cleaning device during working, and is simple in structure and convenient to use. Manual participation can be reduced to the greatest extent, and the ball pushing waiting time and the material supplementing waiting time can be effectively saved, so that the production capacity is optimized and improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline cleaning of slurry conveying systems in the lithium battery industry, in particular to a double-ball bidirectional pipeline cleaning system for lithium battery slurry. Background Art

[0002] Single ball two-way pushing, the first pushing mode requires manual ball collection and loading, which is greatly affected by human factors, prone to high risk of pipe blockage, and there is a certain risk of material explosion; the second pushing mode, single ball two-way pushing reduces the action of collecting and loading balls, and can achieve automatic round trip, but the current mainstream lithium battery slurry conveying pipeline has a main pipeline volume from the tail to the head part that is larger than the volume of the single transfer tank at the head, and is limited by the process (there is only one empty tank at the head and tail). At present, these two pushing modes will have a situation of waiting for the ball to be pushed during the pushing process, and the pipeline cannot be filled with materials by itself after being pushed empty, which seriously affects production capacity;

[0003] In order to solve the above problems, it is necessary to develop a fully automatic pigging system with high automation, simple operation, safety, reliability and reasonable price to achieve the purpose of energy saving and increased production. Therefore, we propose a double-ball bidirectional pigging system for lithium battery slurry. Utility Model Content

[0004] The utility model aims to provide a lithium battery slurry double-ball bidirectional pigging system to solve the above-mentioned deficiencies in the technology.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lithium battery slurry double-ball bidirectional pigging system, comprising a sending station, a return station, a feeding module, a conveying pipeline module and a buffer tank module, wherein the sending station and the return station are located at both ends of the conveying pipeline module, and a buffer tank module is provided on the passage of the conveying pipeline module, and the feeding module is located on the conveying pipeline module path close to the sending station;

[0006] The sending station includes a recovery barrel, a recovery valve, a first sensor, a first positive air intake valve, a first cleaning ball, a second positive air intake valve, a second sensor, a first pressure sensor, a pressure relief valve, a mechanical pressure gauge, a sending pipeline, a sending valve, and a check valve. The sending pipeline is the main body of the sending station. The recovery barrel is located at one end of the sending pipeline away from the check valve, and the recovery valve, the first sensor, the first positive air intake valve, the first cleaning ball, the second positive air intake valve, the second sensor, the first pressure sensor, the pressure relief valve, the mechanical pressure gauge and the sending valve are installed on the sending pipeline in sequence and are located in sequence between the recovery barrel and the check valve.

[0007] The return station includes a third sensor, a first discharge valve, a discharge tee, a return valve, a return pipeline, a second pressure sensor, a fourth sensor, a first air intake valve, a second discharge valve, a fifth sensor, a second cleaning ball, a second air intake valve and a third discharge valve. The return pipeline is the main body of the return station. The third sensor and the third discharge valve are installed at both ends of the return pipeline, and the third sensor, the first discharge valve, the discharge tee, the return valve, the second pressure sensor, the fourth sensor, the first air intake valve, the second discharge valve, the fifth sensor, the second air intake valve and the third discharge valve are installed in sequence on the return pipeline between them.

[0008] The delivery pipeline module includes a first pipeline discharge valve, a first stop valve, a second pipeline discharge valve, a third pipeline discharge valve, a second stop valve, a fourth pipeline discharge valve, a third pressure sensor and a delivery main pipeline. The delivery main pipeline is the main passage from the stirring section to the coating machine head section, and the inner diameter of the pipeline is consistent with the inner diameter of the main valve, and the bend adopts an elbow of more than 3D. The third pressure sensor is arranged on the delivery main pipeline, and a plurality of third sensors are also arranged on the delivery main pipeline;

[0009] The buffer tank module includes a first transfer tank, a second transfer tank, a third transfer tank, a fourth transfer tank and a fifth transfer tank. The first transfer tank is a first-level transfer tank in the stirring section, the second transfer tank and the third transfer tank are second-level tail transfer tanks in the coating section, and the fourth transfer tank and the fifth transfer tank are second-level head transfer tanks in the coating section.

[0010] Furthermore, the recovery barrel is used to recover the material when the first cleaning ball returns. A respirator and a liquid level detector are also installed on the recovery barrel for exhaust and detection of material liquid level. A first ball-turning step is provided on the sending pipeline specifically for the first cleaning ball to travel back and forth. The first cleaning ball is located in the sending pipeline, and the first cleaning ball is an integral multi-gasket cleaning ball with a top rod. The first sensor and the second sensor are used to sense the position of the first cleaning ball.

[0011] Furthermore, the sending pipeline is provided with an air inlet connected to the first positive air inlet valve and the second positive air inlet valve, and is provided with a discharge port connected to the recovery valve, and is also provided with a functional port connected to the second sensor, the first pressure sensor, and the pressure relief valve. At the same time, the sending pipeline is connected and installed with the sending valve and the inspection valve in sequence.

[0012] Furthermore, the return pipeline is provided with a second ball-turning step specially for the smooth reciprocating movement of the cleaning ball, and is provided with an air inlet connected to the first air inlet valve and the second air inlet valve, and is also provided with two discharge ports connected to the second discharge valve and the third discharge valve, and is provided with a functional port connected to the second pressure sensor. The return pipeline is connected to the return valve and the discharge tee, the second cleaning ball is located in the return pipeline, and the second cleaning ball is an integral multi-gasket cleaning ball with a push rod.

[0013] Furthermore, the unloading tee is a reducing tee, and a stop rod is provided at the tee port to prevent the second cleaning ball from falling, and the tee port is connected to the first unloading valve to form a normal main unloading port.

[0014] Furthermore, the first unloading valve, return valve, second unloading valve and third unloading valve correspond to the fourth transfer tank and the fifth transfer tank, the first unloading valve is a forward punching / pushing ball unloading valve, when the second unloading valve is a double-ball pushing ball, the end-recovery unloading valve is, when the third unloading valve is a single-ball pushing ball, the end-recovery unloading valve.

[0015] Furthermore, the feeding module includes a pulping machine and a conveying pump. The raw materials are produced by the pulping machine and conveyed to the conveying pipeline module by the conveying pump.

[0016] Furthermore, the first pipeline unloading valve is a forward punching / pushing ball unloading valve, the second pipeline unloading valve is a reverse pushing ball unloading valve, the third pipeline unloading valve is a forward punching / pushing ball unloading valve, and the fourth pipeline unloading valve is a reverse pushing ball unloading valve.

[0017] Furthermore, the first pipeline discharge valve, the first stop valve and the second pipeline discharge valve correspond to the first transfer tank, and the third pipeline discharge valve, the second stop valve and the fourth pipeline discharge valve correspond to the second transfer tank.

[0018] Furthermore, the first cleaning ball and the second cleaning ball are respectively located at the ends of the sending station and the return station. When there is a need to push the ball, the second cleaning ball at the return station can push the material back, and the first cleaning ball at the sending station can push the material forward.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] In the present invention, through the design of the sending station, return station, feeding module, conveying pipeline module and buffer tank module, the sending station, return station, feeding module, conveying pipeline module and buffer tank module constitute the hardware part of the system, and the supporting control module (software) coordinates each hardware to work according to the specified instructions, and jointly realizes the functions of double-ball two-way pipe cleaning and arbitrary transfer tank pushing ball unloading. The utility model is suitable for lithium battery slurry conveying systems under various working conditions, and is also suitable for pipe cleaning systems with similar requirements in other industries. It can effectively and efficiently clean the lithium battery slurry conveying pipeline. After the pipe cleaning ball is put in during work, there is no need to release and collect the ball for a long time, which can minimize human participation and effectively save the waiting time for pushing the ball and replenishing materials, thereby optimizing and improving production capacity.

[0021] The utility model has the following advantages:

[0022] 1. Ingenious design, easy to manufacture and install;

[0023] 2. Less human involvement and low risk of human factors;

[0024] 3. Simple operation, safe and reliable equipment, and low safety risk;

[0025] 4. It can realize two-way cleaning, and the ball-pushing material can enter any transfer tank, with strong maneuverability;

[0026] 5. The system automatically creates cleaning conditions and automatically cleans pipes according to the settings, with a high degree of automation;

[0027] 6. Long distance for cleaning pipeline and less waste materials;

[0028] 7. Few supporting equipment, high space utilization and moderate price

[0029] 8. Easy maintenance and troubleshooting. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the overall structure of a lithium battery slurry double-ball bidirectional pigging system provided by the utility model;

[0031] Figure 2 A schematic diagram of the structure of a sending station of a lithium battery slurry double-ball bidirectional pigging system provided by the utility model;

[0032] Figure 3 A schematic diagram of the return station structure of a lithium battery slurry double-ball bidirectional pigging system provided by the utility model;

[0033] Figure 4 A schematic diagram of the structure of a feeding module of a double-ball bidirectional pigging system for lithium battery slurry provided by the utility model;

[0034] Figure 5 A schematic diagram of the structure of a conveying pipeline of a double-ball bidirectional pigging system for lithium battery slurry provided by the utility model;

[0035] Figure 6 A schematic diagram of the structure of a cleaning ball of a lithium battery slurry double-ball bidirectional cleaning system provided by the utility model.

[0036] Legend: 1. Recovery barrel; 2. Recovery valve; 3. First sensor; 4. First positive air inlet valve; 5. First cleaning ball; 6. Second positive air inlet valve; 7. Second sensor; 8. First pressure sensor; 9. Pressure relief valve; 10. Mechanical pressure gauge; 11. Sending pipeline; 12. Sending valve; 13. Inspection valve; 101. Respirator; 102. Liquid level detector; 103. First ball-turning step;

[0037] 14. The third sensor; 15. The first discharge valve; 16. The discharge tee; 17. The return valve; 18. The return pipe; 19. The second pressure sensor; 20. The fourth sensor; 21. The first air inlet valve; 22. The second discharge valve; 23. The fifth sensor; 24. The second cleaning ball; 25. The second air inlet valve; 26. The third discharge valve; 201. The second ball-turning step;

[0038] 27. Pulping machine; 28. Delivery pump;

[0039] 29. First pipeline discharge valve; 30. First stop valve; 31. Second pipeline discharge valve; 32. Third pipeline discharge valve; 33. Second stop valve; 34. Fourth pipeline discharge valve; 35. Third pressure sensor; 36. Delivery main pipeline; 361. Sixth sensor;

[0040] 37. The first transfer tank; 38. The second transfer tank; 39. The third transfer tank; 40. The fourth transfer tank; 41. The fifth transfer tank. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0042] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant literature, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0043] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0045] Example 1

[0046] like Figure 1-6 As shown, the utility model provides a technical solution: a double-ball bidirectional cleaning system for lithium battery slurry, including a sending station, a return station, a feeding module, a conveying pipeline module and a buffer tank module. The sending station and the return station are located at both ends of the conveying pipeline module, and the buffer tank module is provided on the passage of the conveying pipeline module, while the feeding module is located on the path of the conveying pipeline module near the sending station. The control module (software) is also included as a control program to coordinate the valves and instruments to act according to the specified instructions, thereby realizing the bidirectional cleaning needs.

[0047] The sending station includes a recovery barrel 1, a recovery valve 2, a first sensor 3, a first positive air intake valve 4, a first cleaning ball 5, a second positive air intake valve 6, a second sensor 7, a first pressure sensor 8, a pressure relief valve 9, a mechanical pressure gauge 10, a sending pipeline 11, a sending valve 12, and a check valve 13. The sending pipeline 11 is the main body of the sending station. The recovery barrel 1 is located at one end of the sending pipeline 11 away from the check valve 13, and the recovery valve 2, the first sensor 3, the first positive air intake valve 4, the first cleaning ball 5, the second positive air intake valve 6, the second sensor 7, the first pressure sensor 8, the pressure relief valve 9, the mechanical pressure gauge 10 and the sending valve 12 are installed on the sending pipeline 11 in sequence and are located between the recovery barrel 1 and the check valve 13 in sequence;

[0048] The return station includes a third sensor 14, a first discharge valve 15, a discharge tee 16, a return valve 17, a return pipeline 18, a second pressure sensor 19, a fourth sensor 20, a first air intake valve 21, a second discharge valve 22, a fifth sensor 23, a second cleaning ball 24, a second air intake valve 25 and a third discharge valve 26. The return pipeline 18 is the main body of the return station. The third sensor 14 and the third discharge valve 26 are located at both ends of the return pipeline 18 and are installed away from each other. The third sensor 14, the first discharge valve 15, the discharge tee 16, the return valve 17, the second pressure sensor 19, the fourth sensor 20, the first air intake valve 21, the second discharge valve 22, the fifth sensor 23, the second air intake valve 25 and the third discharge valve 26 are sequentially installed on the return pipeline 18 between them.

[0049] The delivery pipeline module includes a first pipeline discharge valve 29, a first stop valve 30, a second pipeline discharge valve 31, a third pipeline discharge valve 32, a second stop valve 33, a fourth pipeline discharge valve 34, a third pressure sensor 35 and a delivery main pipeline 36. The delivery main pipeline 36 is the main passage from the stirring section to the coating machine head section, and the inner diameter of the pipeline is consistent with the inner diameter of the main valve. The bend adopts an elbow of more than 3D (commonly used 5D elbow). The third pressure sensor 35 is arranged on the delivery main pipeline 36. The delivery main pipeline 36 is also provided with a plurality of third sensors 361, and the third sensors 361 are installed according to the usage;

[0050] The buffer tank module includes a first transfer tank 37, a second transfer tank 38, a third transfer tank 39, a fourth transfer tank 40 and a fifth transfer tank 41. The first transfer tank 37 is a first-level transfer tank in the stirring section, while the second transfer tank 38 and the third transfer tank 39 are second-level tail transfer tanks in the coating section, and the fourth transfer tank 40 and the fifth transfer tank 41 are second-level head transfer tanks in the coating section. The number of transfer tanks at each level (first level, second level) varies according to different needs and is not a fixed number. At the same time, the number of conveying levels also varies according to different needs.

[0051] Example 2

[0052] like Figure 1-6 As shown, the recovery barrel 1 is used to recover the material when the first cleaning ball 5 returns. A respirator 101 and a liquid level detector 102 are also installed on the recovery barrel 1 for exhausting and detecting the material liquid level. A first ball-turning step 103 is provided on the sending pipeline 11 for the first cleaning ball 5 to smoothly return. The first cleaning ball 5 is located in the sending pipeline 11, and the first cleaning ball 5 is an integral multi-gasket cleaning ball with a top rod, which can realize precise control of multiple balls. The first sensor 3 and the second sensor 7 are used to sense the position of the first cleaning ball 5. The recovery barrel 1 can add a discharge pump according to demand to recover the material in the barrel 1.

[0053] The sending pipeline 11 is provided with an air inlet connected to the first positive air inlet valve 4 and the second positive air inlet valve 6, and is provided with a discharge port connected to the recovery valve 2. A functional port is also provided to connect with the second sensor 7, the first pressure sensor 8, and the pressure relief valve 9. At the same time, the sending pipeline 11 is connected and installed with the sending valve 12 and the inspection valve 13 in sequence to form the main channel of the sending station.

[0054] The return pipe 18 is provided with a second ball-turning step 201 specially for the smooth reciprocating movement of the cleaning ball, and is provided with an air inlet connected to the first air inlet valve 21 and the second air inlet valve 25, and is also provided with two discharge ports connected to the second discharge valve 22 and the third discharge valve 26. At the same time, a functional port is provided to connect to the second pressure sensor 19, and the return pipe 18 is connected to the return valve 17 and the discharge tee 16. The second cleaning ball 24 is located in the return pipe 18, and the second cleaning ball 24 is an integral multi-gasket cleaning ball with a push rod, which can realize precise control of multiple balls.

[0055] The unloading tee 16 is a reducing tee, and a stopper rod is provided at the tee port to prevent the second cleaning ball 24 from falling, and the tee port is connected to the first unloading valve 15 to form a normal main unloading port.

[0056] The first unloading valve 15, the return valve 17, the second unloading valve 22 and the third unloading valve 26 correspond to the fourth transfer tank 40 and the fifth transfer tank 41. The first unloading valve 15 is a forward punching / pushing ball unloading valve. When the second unloading valve 22 is a double-ball pushing ball, it is an end-recovery unloading valve. When the third unloading valve 26 is a single-ball pushing ball, it is an end-recovery unloading valve.

[0057] The feeding module includes a pulping machine 27 and a conveying pump 28. The raw materials are produced by the pulping machine 27 and conveyed to the conveying pipeline module by the conveying pump 28.

[0058] The first pipeline discharge valve 29 is a forward discharge valve / ball push discharge valve, the second pipeline discharge valve 31 is a reverse discharge valve, the third pipeline discharge valve 32 is a forward discharge valve / ball push discharge valve, and the fourth pipeline discharge valve 34 is a reverse discharge valve.

[0059] The first pipeline discharge valve 29 , the first stop valve 30 and the second pipeline discharge valve 31 correspond to the first transfer tank 37 , and the third pipeline discharge valve F32 , the second stop valve 33 and the fourth pipeline discharge valve 34 correspond to the second transfer tank 38 .

[0060] The first cleaning ball 5 and the second cleaning ball 24 are respectively located at the end of the sending station and the return station. When there is a need to push the ball, the second cleaning ball 24 at the return station can push the material back, and the first cleaning ball 5 at the sending station can push the material forward.

[0061] The working principle of the lithium battery slurry double-ball bidirectional pigging system is as follows: (It should be added that when used for the first time, all gas sources are connected, the first pigging ball 5 and the second pigging ball 24 are placed in the sending station and the return station respectively, and the top rod is locked. At this time, the pigging ball (refer to Figure 2 and Figure 3 ) shown in the position, the first sensor 3 and the fifth sensor 23 respectively sense the cleaning ball and send back to the control system (light on) and the system is in initial mode)

[0062] 1) There are two empty tanks at the front and rear of the aircraft:

[0063] The first cleaning ball 5 and the second cleaning ball 24 are installed and prepared, the first sensor 3 and the fifth sensor 23 sense the cleaning balls respectively, and feedback signals to the system. When the pipeline is full of materials and the system allows the cleaning operation to be performed, the ball pushing task is performed on the system;

[0064] Step 1: execute the ball pushing at the tail section. When the feed valve is closed, the system first controls the opening of the third pipeline discharge valve 32 and the first stop valve 30, and then opens the sending valve 12. When all valve opening signals are normal, the first positive air inlet valve 4 is opened, and compressed air enters the main pipeline at a specified pressure, pushing the first pig 5 forward, thereby pushing the material into the second transfer tank 38 at the tail section (the second transfer tank 38 automatically switches to the third transfer tank 39 when it is full). When the pig reaches the sixth sensor 361c (reference Figure 5 ), close the first forward air inlet valve 4, open the pressure relief valve 9, and after a delay of 3-5 seconds, close the third pipeline discharge valve 32;

[0065] Step 2: Push the ball in the head section to open the second stop valve 33 and the first discharge valve 15. When all valve opening signals are normal, open the first positive air inlet valve 4 again, and the compressed air enters the main pipeline at the specified pressure, pushing the first pipe cleaning ball 5 to continue to move forward, thereby pushing the material into the fourth transfer tank 40 of the head (the fourth transfer tank 40 automatically switches to the fifth transfer tank 41 after it is full). When the pipe cleaning ball reaches the third sensor 14, close the first positive air inlet valve 4, open the pressure relief valve 9, and after a delay of 3-5 seconds, close the first discharge valve 15.

[0066] Step 3: The cleaning ball is returned to the cage, the second discharge valve 22 is opened, and the return valve 17 is opened. When all valve opening signals are normal, the first positive air inlet valve 4 is opened again, and the compressed air enters the main pipeline at the specified pressure, pushing the first cleaning ball 5 to continue to move forward. When the cleaning ball reaches the fourth sensor 20, the first positive air inlet valve 4 is closed, and the pressure relief valve 9 is opened. After a delay of 3-5 seconds, the second discharge valve 22 is closed, and all sensors are reset;

[0067] Step 4, the cleaning ball returns, the recovery valve 2 is opened, the first air inlet valve 21 is opened, and the compressed air enters the main pipeline at the specified pressure, pushing the first cleaning ball 5 to return. When the cleaning ball reaches the sensor 3, the first air inlet valve 21 is closed and the pressure relief valve 9 is opened. After a delay of 3-5 seconds, the recovery valve 2 is closed, and the material is pushed back into the recovery barrel 1. All valves and sensors are reset. When the system set time is reached and the cleaning conditions are met, the system automatically executes the next cleaning task.

[0068] 2) There is only one empty tank at the front and rear of the machine (normal state of mass production)

[0069] The first cleaning ball 5 and the second cleaning ball 24 are installed and ready. The first sensor 3 and the fifth sensor 23 sense the cleaning balls respectively and feedback signals to the system. When the pipeline is full of materials and the system allows the cleaning operation to be performed, the ball pushing task is performed on the system.

[0070] Step 1: Push the material back to the tail of the machine, open the fourth pipeline discharge valve 34 and the air transfer tank, open the return valve 17, and when all valve opening signals are normal, open the reverse second air inlet valve 25, and the compressed air enters the main pipeline at the specified pressure, pushing the second pipe cleaning ball 24 forward (reverse), thereby pushing the material into the air transfer tank at the tail of the machine. When the transfer tank reaches the specified liquid level (weight), close the reverse second air inlet valve 25, close the fourth pipeline discharge valve 34, open the third discharge valve 26 and the head empty tank feed valve to release pressure;

[0071] Step 2, execute the ball pushing of the head section, open the first stop valve 30, the second stop valve 33, the third discharge valve 26, and the sending valve 12. When all valve opening signals are normal, open the first positive air inlet valve 4, and the compressed air enters the main pipeline at the specified pressure, pushing the first cleaning ball 5 forward, thereby pushing the material and the second cleaning ball 24 forward. When the second cleaning ball 24 reaches the fifth sensor 23, close the first positive air inlet valve 4, open the first discharge valve 15, close the third discharge valve 26, close the return valve 17, continue to open the first positive air inlet valve 4, and the material continues to move forward. When the cleaning ball reaches the third sensor 14, close the first positive air inlet valve 4, open the pressure relief valve 9, and after a delay of 3-5 seconds, close the first discharge valve 15;

[0072] Step 3: The cleaning ball is returned to the cage, the second discharge valve 22 is opened, and the return valve 17 is opened. When all valve opening signals are normal, the first forward air inlet valve 4 is opened again, and the compressed air enters the main pipeline at the specified pressure, pushing the first cleaning ball 5 to continue to move forward. When the cleaning ball reaches the fourth sensor 20, the first forward air inlet valve 4 is closed, and the pressure relief valve 9 is opened. After a delay of 3-5 seconds, the second discharge valve 22 is closed, and all sensors are reset.

[0073] Step 4, the cleaning ball returns, the recovery valve 2 is opened, the first air inlet valve 21 is opened, and the compressed air enters the main pipeline at the specified pressure, pushing the first cleaning ball 5 to return. When the cleaning ball reaches the sensor 3, the first air inlet valve 21 is closed and the pressure relief valve 9 is opened. After a delay of 3-5 seconds, the recovery valve 2 is closed, and the material is pushed back into the recovery barrel 1. All valves and sensors are reset. When the system set time is reached and the cleaning conditions are met, the system automatically executes the next cleaning task.

[0074] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art 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 appended claims and their equivalents.

Claims

1. A double-ball bidirectional pigging system for lithium battery slurry, characterized by: It includes a sending station, a return station, a feeding module, a conveying pipeline module and a buffer tank module. The sending station and the return station are located at both ends of the conveying pipeline module, and the buffer tank module is provided on the passage of the conveying pipeline module, while the feeding module is located on the path of the conveying pipeline module near the sending station. The sending station comprises a recovery barrel (1), a recovery valve (2), a first sensor (3), a first positive air intake valve (4), a first cleaning ball (5), a second positive air intake valve (6), a second sensor (7), a first pressure sensor (8), a pressure relief valve (9), a mechanical pressure gauge (10), a sending pipeline (11), a sending valve (12), and a check valve (13). The sending pipeline (11) is the main body of the sending station (I). The recovery barrel (1) is located at one end of the sending pipeline (11) away from the check valve (13), and the recovery valve (2), the first sensor (3), the first positive air intake valve (4), the first cleaning ball (5), the second positive air intake valve (6), the second sensor (7), the first pressure sensor (8), the pressure relief valve (9), the mechanical pressure gauge (10) and the sending valve (12) are sequentially installed on the sending pipeline (11) and sequentially located between the recovery barrel (1) and the check valve (13); The return station comprises a third sensor (14), a first discharge valve (15), a discharge tee (16), a return valve (17), a return pipeline (18), a second pressure sensor (19), a fourth sensor (20), a first air intake valve (21), a second discharge valve (22), a fifth sensor (23), a second cleaning ball (24), a second air intake valve (25) and a third discharge valve (26); the return pipeline (18) is the main body of the return station (II); the third sensor (14) and the third discharge valve (26) are located at two ends of the return pipeline (18) and are installed away from each other; and the third sensor (14), the first discharge valve (15), the discharge tee (16), the return valve (17), the second pressure sensor (19), the fourth sensor (20), the first air intake valve (21), the second discharge valve (22), the fifth sensor (23), the second air intake valve (25) and the third discharge valve (26) are installed in sequence on the return pipeline (18) between them; The delivery pipeline module comprises a first pipeline discharge valve (29), a first stop valve (30), a second pipeline discharge valve (31), a third pipeline discharge valve (32), a second stop valve (33), a fourth pipeline discharge valve (34), a third pressure sensor (35) and a delivery main pipeline (36). The delivery main pipeline (36) is a main passage from the stirring section to the coating machine head section, and the inner diameter of the pipeline is consistent with the inner diameter of the main valve, and the bend adopts an elbow greater than 3D. The third pressure sensor (35) is arranged on the delivery main pipeline (36), and the delivery main pipeline (36) is also provided with a plurality of sixth sensors (361); The buffer tank module includes a first transfer tank (37), a second transfer tank (38), a third transfer tank (39), a fourth transfer tank (40) and a fifth transfer tank (41), wherein the first transfer tank (37) is a first-level transfer tank of the stirring section, while the second transfer tank (38) and the third transfer tank (39) are second-level tail transfer tanks of the coating section, and the fourth transfer tank (40) and the fifth transfer tank (41) are second-level head transfer tanks of the coating section.

2. A lithium battery slurry double-ball bidirectional pigging system according to claim 1, characterized in that: The recovery barrel (1) is used to recover the material when the first cleaning ball (5) returns. A respirator (101) and a liquid level detector (102) are also installed on the recovery barrel (1) for exhausting air and detecting the material liquid level. The sending pipeline (11) is provided with a first ball turning step (103) specially for the first cleaning ball (5) to go back and forth. The first cleaning ball (5) is located in the sending pipeline (11), and the first cleaning ball (5) is an integral multi-gasket cleaning ball with a top rod. The first sensor (3) and the second sensor (7) are used to sense the position of the first cleaning ball (5).

3. A lithium battery slurry double-ball bidirectional pigging system according to claim 1, characterized in that: The sending pipeline (11) is provided with an air inlet connected to the first positive air inlet valve (4) and the second positive air inlet valve (6), and is provided with a discharge port connected to the recovery valve (2). It is also provided with a functional port connected to the second sensor (7), the first pressure sensor (8), and the pressure relief valve (9). At the same time, the sending pipeline (11) is connected to the sending valve (12) and the inspection valve (13) in sequence.

4. A lithium battery slurry double-ball bidirectional pigging system according to claim 1, characterized in that: The return pipe (18) is provided with a second ball-turning step (201) specially for the smooth reciprocating movement of the cleaning ball, and is provided with an air inlet connected to the first air inlet valve (21) and the second air inlet valve (25), and is also provided with two discharge ports connected to the second discharge valve (22) and the third discharge valve (26), and is provided with a functional port connected to the second pressure sensor (19). The return pipe (18) is connected to the return valve (17) and the discharge tee (16), and the second cleaning ball (24) is located in the return pipe (18), and the second cleaning ball (24) is an integral multi-gasket cleaning ball with a push rod.

5. A lithium battery slurry double-ball bidirectional pigging system according to claim 1, characterized in that: The unloading tee (16) is a reducing tee, and a stop rod is provided at the tee opening to prevent the second cleaning ball (24) from falling, and the tee opening is connected to the first unloading valve (15) to form a normal main unloading opening.

6. A lithium battery slurry double-ball bidirectional pigging system according to claim 1, characterized in that: The first discharge valve (15), the return valve (17), the second discharge valve (22) and the third discharge valve (26) correspond to the fourth transfer tank (40) and the fifth transfer tank (41); the first discharge valve (15) is a forward punching / pushing ball discharge valve; when the second discharge valve (22) is a double-ball pushing ball discharge valve, it is an end-recovery discharge valve; when the third discharge valve (26) is a single-ball pushing ball discharge valve, it is an end-recovery discharge valve.

7. A lithium battery slurry double-ball bidirectional pigging system according to claim 1, characterized in that: The feed module comprises a pulping machine (27) and a delivery pump (28). Raw materials are produced by the pulping machine (27) and delivered to the delivery pipeline module by the delivery pump (28).

8. The double-ball bidirectional pigging system for lithium battery slurry according to claim 1, characterized in that: The first pipeline discharge valve (29) is a forward discharge valve / ball push discharge valve, the second pipeline discharge valve (31) is a reverse discharge valve, the third pipeline discharge valve (32) is a forward discharge valve / ball push discharge valve, and the fourth pipeline discharge valve (34) is a reverse discharge valve.

9. A lithium battery slurry double-ball bidirectional pigging system according to claim 1, characterized in that: The first pipeline discharge valve (29), the first stop valve (30) and the second pipeline discharge valve (31) correspond to the first transfer tank (37), and the third pipeline discharge valve (32), the second stop valve (33) and the fourth pipeline discharge valve (34) correspond to the second transfer tank (38).

10. A lithium battery slurry double-ball bidirectional pigging system according to claim 1, characterized in that: The first cleaning ball (5) and the second cleaning ball (24) are respectively located at the ends of the sending station and the return station. When there is a need to push the ball, the second cleaning ball (24) at the return station can push the material back, and the first cleaning ball (5) at the sending station can push the material forward.

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