Vacuum side leakage detection method

Abstract

The invention relates to the technical field of capacitor production, and particularly discloses a vacuum side leakage detection method which comprises a conveying mechanism, a sleeve cup frame is arranged on the inner side of the conveying mechanism, a plurality of liquid injection holes are formed in the upper end face of the sleeve cup frame, a moving mechanism is fixedly arranged above the conveying mechanism, and the inner side of the moving mechanism is connected with a mounting plate. The mounting plate can be driven by the moving mechanism to transversely move, and a pressure detection mechanism is mounted on the upper side of the mounting plate; the pressure detection mechanism comprises a gas injection head, a pressure sensor and a gas distribution seat; the multiple gas injection heads are installed on the lifting mechanism, the number of the gas injection heads is the same as that of the single-row liquid injection holes in the retainer cup frame, the lifting mechanism is used for driving the gas injection heads to ascend and descend vertically, and communication and separation of the gas injection heads and the liquid injection holes are achieved. According to the liquid injection device, products with unqualified tightness can be distinguished, liquid injection of the products with side leakage is prevented, the overall automation degree is high, and the working efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of capacitor production, and in particular to a vacuum side leakage detection method. Background Art

[0002] When producing capacitors, the electrolyte injection methods mainly adopt two methods: immersion injection and normal pressure injection. However, the electrolyte absorption efficiency is relatively slow during immersion injection and normal pressure injection. Therefore, in recent years, many manufacturers have gradually adopted the vacuum injection method, that is, vacuum treatment is performed before injection, and then electrolyte injection is performed. The electrolyte is sucked in through negative pressure, which greatly reduces the time of electrolyte absorption and improves production efficiency.

[0003] When using the vacuum injection method, the capacitor needs to be equipped with a sleeve cup, and the seal between the sleeve cup and the capacitor is very important. Insufficient sealing will not only affect the subsequent vacuum effect, but also cause electrolyte leakage. At present, after the capacitor is covered with a cup, it will directly enter the injection station. The sealing between the sleeve cup and the capacitor is difficult to ensure, and the defective rate after injection is high. Therefore, those skilled in the art provide a vacuum side leakage detection method to solve the problems raised in the above background technology. Summary of the invention

[0004] The purpose of the present invention is to provide a vacuum side leakage detection method to solve the above technical problems.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A vacuum side leakage detection method includes a conveying mechanism, a cup holder is arranged inside the conveying mechanism, a plurality of injection holes are arranged on the upper end surface of the cup holder, a moving mechanism is fixedly arranged above the conveying mechanism, a mounting plate is connected to the inner side of the moving mechanism, the mounting plate can be driven by the moving mechanism to move horizontally, and a pressure detection mechanism is installed on the upper side of the mounting plate;

[0007] The pressure detection mechanism includes a gas injection head, a pressure sensor and a gas distributor seat;

[0008] The gas injection heads are provided in plurality and are installed with a lifting mechanism. The number of the gas injection heads is the same as the number of the single-row liquid injection holes on the cup holder. The lifting mechanism is used to drive the gas injection heads to move up and down to achieve the connection and separation between the gas injection heads and the liquid injection holes.

[0009] The gas distributor is fixed on the upper end of the mounting plate, and a plurality of booster pumps are fixed on the upper end of the gas distributor. The input end of the booster pump is connected to the gas outlet end of the gas distributor, and the output end is connected to the gas injection head.

[0010] There are a plurality of pressure sensors, which are respectively arranged on the pipelines between each booster pump and the gas injection head to detect the air pressure inside the pipeline.

[0011] Furthermore, air pumps are fixed on both sides of the upper end of the air distribution seat, and the air distribution seat includes a seat body, and a main air pipe is opened inside the seat body. The main air pipe is connected to the outside through multiple air distribution pipes, and the air distribution pipes are air outlet ends and are connected to the booster pump. The output ends of the two air delivery pumps are respectively connected to the two ends of the main air pipe;

[0012] Further, the lifting mechanism comprises a bottom plate and an upper plate respectively arranged on the upper and lower sides of the mounting plate and a cylinder three fixed at the middle of the mounting plate, the extended end of the cylinder three is fixedly connected to the upper plate, a plurality of guide rods penetrating the mounting plate are fixedly connected between the bottom plate and the upper plate, and the gas injection heads are evenly fixed on the inner side of the bottom plate;

[0013] Further, the moving mechanism comprises a frame, both ends of the frame are rotatably connected with a rotating shaft, both ends of the rotating shaft are fixedly sleeved with synchronous wheels, a synchronous belt is connected between two opposite synchronous wheels, both ends of the mounting plate are fixed with the synchronous belt, and the rotating shaft is driven by a motor;

[0014] Furthermore, a positioning component and a blocking component are provided inside the conveying mechanism, wherein the positioning component is used to position the bottom of the cup holder, and the blocking component is used to block the cup holder that has been conveyed to the right position;

[0015] Further, the positioning assembly includes a fixing plate fixed to the conveying mechanism, a positioning plate is arranged above the fixing plate, a cylinder 1 is fixed at the center of the lower end surface of the fixing plate, the protruding end of the cylinder 1 is fixedly connected to the positioning plate, and a plurality of positioning columns are fixed to the upper end surface of the positioning plate, and the positioning columns correspond to the bottom holes of the cup holder;

[0016] The blocking assembly includes two cylinders 2 fixed near the output direction of the conveying mechanism, the upper end of the cylinder 2 is rotatably connected with a blocking block, and the lower end of the blocking block is fixedly connected to the protruding end of the cylinder 2.

[0017] Further, the following steps are included:

[0018] S1. The cup holder is transported to the detection area and positioned by the conveying mechanism;

[0019] S2, the gas injection head is driven to move to the first row of liquid injection holes through the moving mechanism, the lifting mechanism drives the gas injection head to be lowered to communicate with the liquid injection holes, and the booster pump is started to fill the gas with a certain pressure;

[0020] S3, when the pressure of the inflated gas reaches the set value, the inflation is stopped. After a period of stabilization, the pressure change is monitored through the data of the pressure sensor. If the sealing is good, the pressure will remain relatively stable; if there is a leak, the pressure will drop;

[0021] S4, after the previous row of inspection is completed, the gas injection head is separated from the cup holder, and moved to the next row of inspection holes through the moving mechanism and the lifting mechanism, and steps S2 and S3 are repeated;

[0022] S5. After the sealing of each set of cups and capacitors is tested, the conveying mechanism outputs the set of cups, and the pressure testing mechanism returns to the initial position, waiting for the next set of set of cups to enter;

[0023] Beneficial effects of the present invention:

[0024] 1. A vacuum side leakage detection method proposed in the present invention uses an inflation pressure detection method to detect the sealing between the capacitor and the sleeve cup, distinguishes products with unqualified sealing, prevents the injection of liquid into products with side leakage, reduces the waste of electrolyte, reduces production costs, and ensures the consistency and quality of products.

[0025] 2. A vacuum side leakage detection method proposed in the present invention is provided with a moving mechanism and a lifting mechanism, with a high overall degree of automation and capable of rapid detection. At the same time, an air separation method using an air separator is adopted. Before inflation, the gas in the air separator can have a certain pressure, and the subsequent booster pump can quickly increase the air pressure to a set value, thereby reducing the time required for boosting. The working efficiency is high, and each booster pump is independent, so the test result is accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] Figure 1 It is an overall structural diagram of a vacuum side leakage detection method proposed by the present invention;

[0028] Figure 2 It is a front view structural diagram of a pressure detection mechanism and a lifting mechanism in a vacuum side leakage detection method proposed by the present invention;

[0029] Figure 3 It is a rear view structural diagram of a pressure detection mechanism in a vacuum side leakage detection method proposed by the present invention;

[0030] Figure 4 It is a top cross-sectional view of a gas distributor in a vacuum side leakage detection method proposed by the present invention;

[0031] Figure 5 It is a structural diagram of a moving mechanism in a vacuum side leakage detection method proposed by the present invention;

[0032] Figure 6 It is a structural diagram of a conveying mechanism in a vacuum side leakage detection method proposed by the present invention.

[0033] Reference numerals:

[0034] 1. Conveying mechanism; 11. Positioning assembly; 111. Fixing plate; 112. Positioning plate; 113. Cylinder one; 12. Blocking assembly; 121. Cylinder two; 122. Blocking block; 2. Cup holder; 3. Moving mechanism; 31. Frame; 32. Rotating shaft; 33. Synchronous wheel; 34. Synchronous belt; 35. Motor; 4. Pressure detection mechanism; 41. Gas injection head; 42. Pressure sensor; 43. Gas distributor seat; 431. Seat body; 432. Main gas pipe; 433. Gas distributor pipe; 44. Gas delivery pump; 45. Booster pump; 5. Lifting mechanism; 51. Cylinder three; 52. Bottom plate; 53. Upper plate; 54. Guide rod; 6. Mounting plate. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Embodiment 1

[0037] See also Figures 1 to 4 As shown, a vacuum side leakage detection method in an embodiment of the present invention includes a conveying mechanism 1, a cup holder 2 is arranged on the inner side of the conveying mechanism 1, and a plurality of liquid injection holes are arranged on the upper end surface of the cup holder 2. A moving mechanism 3 is fixedly arranged above the conveying mechanism 1, and a mounting plate 6 is connected to the inner side of the moving mechanism 3. The mounting plate 6 can be driven by the moving mechanism 3 to move laterally, and a pressure detection mechanism 4 is installed on the upper side of the mounting plate 6. The cup holder 2 is conveyed to the detection area by the conveying mechanism 1, and the pressure detection mechanism 4 is driven to transfer by the moving mechanism 3 to detect the blocked area on the cup holder 2.

[0038] Among them, the pressure detection mechanism 4 includes a gas injection head 41, a pressure sensor 42 and a gas separation seat 43; the gas injection head 41 has multiple and is installed with the lifting mechanism 5, the number of the gas injection head 41 is the same as the number of the single row of liquid injection holes on the cup holder 2, and the lifting mechanism 5 is used to drive the gas injection head 41 to move up and down to achieve the connection and separation between the gas injection head 41 and the liquid injection holes; the gas separation seat 43 is fixed to the upper end of the mounting plate 6, and multiple booster pumps 45 are fixed to the upper end of the gas separation seat 43, the input end of the booster pump 45 is connected to the gas outlet end of the gas separation seat 43, and the output end is connected to the gas injection head 41; there are multiple pressure sensors 42, which are respectively arranged on the pipeline between each booster pump 45 and the gas injection head 41, so as to detect the air pressure inside the pipeline.

[0039] Air delivery pumps 44 are fixed on both sides of the upper end of the air distribution seat 43. The air distribution seat 43 includes a seat body 431. A main air pipe 432 is provided inside the seat body 431. The main air pipe 432 is connected to the outside through a plurality of air distribution pipes 433. The air distribution pipes 433 are air outlet ends and are connected to the booster pump 45. The output ends of the two air delivery pumps 44 are respectively connected to the two ends of the main air pipe 432.

[0040] During the inspection, the lifting mechanism 5 is lowered, and the gas injection head 41 is connected to the injection hole on the cup holder 2. The gas delivery pump 44 supplies gas, which is divided by the gas distributor 43. Then, each independent booster pump 45 provides gas pressurization, and finally the gas is output by the gas injection head 41 to inflate the capacitor and the cup. The internal pressure of the pipeline is monitored by the pressure sensor 42, so as to judge whether the sealing is qualified by the pressure change.

[0041] Among them, the pressure sensor 42 can be connected to an external control system (not shown in the figure), and the control system analyzes the value of the pressure sensor 42 to determine whether the sealing is qualified and mark the unqualified parts for subsequent processing. The control system and marking method use existing technologies and will not be repeated here.

[0042] Among them, the air delivery pump 44 is used to supply air, and the air distribution seat 43 is used to distribute air, so that the gas in the air distribution seat 43 can have a certain pressure before inflation, which is convenient for the subsequent booster pump 45 to quickly increase the air pressure to the set value, thereby reducing the time required for boosting and improving efficiency. Moreover, each booster pump 45 independently supplies air to the injection head 41, which can ensure the accuracy of the test results.

[0043] Embodiment 2

[0044] Based on Example 1, please refer to Figure 2 and Figures 5 and 6 As shown, the lifting mechanism 5 includes a bottom plate 52 and an upper plate 53 respectively arranged on the upper and lower sides of the mounting plate 6, and a cylinder three 51 fixed at the middle of the mounting plate 6. The protruding end of the cylinder three 51 is fixedly connected to the upper plate 53. A plurality of guide rods 54 penetrating the mounting plate 6 are fixedly connected between the bottom plate 52 and the upper plate 53. The gas injection head 41 is evenly fixed on the inner side of the bottom plate 52. When lifting, the bottom plate 52 is driven to lift up and down through the action of the cylinder three 51, thereby driving the gas injection head 41 to separate and connect with the liquid injection port. Among them, the use of the cylinder three 51 as an actuator can meet the action requirements of the gas injection head 41, and at the same time, the action is fast and efficient.

[0045] The moving mechanism 3 includes a frame 31, both ends of the frame 31 are rotatably connected with a rotating shaft 32, both ends of the rotating shaft 32 are fixedly sleeved with synchronous wheels 33, a synchronous belt 34 is connected between two opposite synchronous wheels 33, both ends of the mounting plate 6 are fixed to the synchronous belt 34, a rotating shaft 32 is driven by a motor 35, the motor 35 drives the rotating shaft 32 to rotate, the synchronous wheel 33 drives the synchronous belt 34, and then drives the mounting plate 6 to move, thereby realizing the position adjustment of the pressure detection mechanism 4.

[0046] In order to ensure the accurate position of the cup holder 2, a positioning component 11 and a blocking component 12 are provided inside the conveying mechanism 1. The positioning component 11 is used to position the bottom of the cup holder 2, and the blocking component 12 is used to block the cup holder 2 that has been conveyed to the right position.

[0047] Specifically, the positioning assembly 11 includes a fixed plate 111 fixed to the conveying mechanism 1, a positioning plate 112 is arranged above the fixed plate 111, a cylinder 113 is fixed at the center of the lower end surface of the fixed plate 111, the protruding end of the cylinder 113 is fixedly connected to the positioning plate 112, and a plurality of positioning columns are fixed to the upper end surface of the positioning plate 112, and the positioning columns correspond to the bottom holes of the cup holder 2.

[0048] The blocking assembly 12 includes two cylinders 121 fixed near the output direction of the conveying mechanism 1 , the upper end of the cylinder 121 is rotatably connected to a blocking block 122 , and the lower end of the blocking block 122 is fixedly connected to the protruding end of the cylinder 121 .

[0049] After the cup holder 2 is transported to the right position, it will be blocked by the blocking block 122 of the blocking assembly 12, and then the cylinder 1 113 drives the positioning plate 112 to rise to position the cup holder 2, wherein a hole corresponding to the positioning column is provided at the bottom of the cup holder 2 (not shown in the figure), and the positioning column is plugged into the corresponding hole to ensure the positioning of the cup holder 2. After the inspection is completed, the cylinder 1 113 is lowered, the positioning plate 112 is separated from the bottom of the cup holder 2, and the cylinder 2 121 is extended, so that the blocking block 122 is transformed into a horizontal state, and the blocking is released, so that the cup holder 2 can be output to the next station.

[0050] Embodiment 3

[0051] See also Figures 1 to 6 As shown, this embodiment provides a vacuum side leakage detection method, including the following steps:

[0052] S1. The cup holder 2 is transported to the detection area by the transport mechanism 1 and positioned. When arriving at the detection area, the cup holder 2 is first blocked by the blocking component 12, and then the cup holder 2 is positioned by the positioning component 11 to ensure the accurate position of the cup holder 2.

[0053] S2, the gas injection head 41 is moved to the first row of liquid injection holes by the moving mechanism 3, the lifting mechanism 5 drives the gas injection head 41 to be lowered and connected to the liquid injection holes, and the booster pump 45 is started to fill the gas with a certain pressure;

[0054] S3, when the pressure of the filled gas reaches the set value, the inflation is stopped. After a period of stabilization, the pressure change is monitored through the data of the pressure sensor 42. If the sealing is good, the pressure will remain relatively stable; if there is a leak, the pressure will drop;

[0055] S4, after the detection of the previous row is completed, the gas injection head 41 is separated from the cup holder 2, and moved to the next row of detection holes through the moving mechanism 3 and the lifting mechanism 5, and steps S2 and S3 are repeated;

[0056] S5. After the sealing of each set of cups and capacitors is tested, the conveying mechanism 1 outputs the set of cup racks 2, and the pressure testing mechanism 4 returns to the initial position, waiting for the next set of set of cup racks 2 to enter.

[0057] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A vacuum side leakage detection method, comprising a conveying mechanism (1), wherein a cup holder (2) is arranged inside the conveying mechanism (1), and a plurality of liquid injection holes are arranged on the upper end surface of the cup holder (2), characterized in that: A moving mechanism (3) is fixedly arranged above the conveying mechanism (1); the inner side of the moving mechanism (3) is connected to a mounting plate (6); the mounting plate (6) can be driven by the moving mechanism (3) to move laterally; and a pressure detection mechanism (4) is installed on the upper side of the mounting plate (6); The pressure detection mechanism (4) comprises a gas injection head (41), a pressure sensor (42) and a gas distribution seat (43); The gas injection heads (41) are provided in plurality and are mounted on the lifting mechanism (5); the number of the gas injection heads (41) is the same as the number of the single-row liquid injection holes on the cup holder (2); the lifting mechanism (5) is used to drive the gas injection heads (41) to move up and down, thereby achieving connection and separation between the gas injection heads (41) and the liquid injection holes; The gas distribution seat (43) is fixed on the upper end of the mounting plate (6), and a plurality of booster pumps (45) are fixed on the upper end of the gas distribution seat (43), the input end of the booster pump (45) is connected to the gas outlet end of the gas distribution seat (43), and the output end is connected to the gas injection head (41); There are a plurality of pressure sensors (42), which are respectively arranged on the pipeline between each booster pump (45) and the gas injection head (41) to detect the gas pressure inside the pipeline.

2. A vacuum side leakage detection method according to claim 1, characterized in that: Air delivery pumps (44) are fixed on both sides of the upper end of the air distribution seat (43). The air distribution seat (43) comprises a seat body (431). A main air pipe (432) is provided inside the seat body (431). The main air pipe (432) is connected to the outside through a plurality of air delivery pipes (433). The air delivery pumps (44) are air outlets and are connected to a booster pump (45). The output ends of the two air delivery pumps (44) are respectively connected to the two ends of the main air pipe (432).

3. A vacuum side leakage detection method according to claim 1, characterized in that: The lifting mechanism (5) comprises a bottom plate (52) and an upper plate (53) respectively arranged on the upper and lower sides of the mounting plate (6) and a cylinder three (51) fixed at the middle of the mounting plate (6); the protruding end of the cylinder three (51) is fixedly connected to the upper plate (53); a plurality of guide rods (54) penetrating the mounting plate (6) are fixedly connected between the bottom plate (52) and the upper plate (53); and the gas injection heads (41) are evenly spaced and fixed on the inner side of the bottom plate (52).

4. A vacuum side leakage detection method according to claim 3, characterized in that: The moving mechanism (3) comprises a frame (31), both ends of the frame (31) are rotatably connected to a rotating shaft (32), both ends of the rotating shaft (32) are fixedly sleeved with synchronous wheels (33), a synchronous belt (34) is connected between two opposite synchronous wheels (33), both ends of the mounting plate (6) are fixed to the synchronous belt (34), and the rotating shaft (32) is driven by a motor (35).

5. A vacuum side leakage detection method according to claim 4, characterized in that: A positioning component (11) and a blocking component (12) are arranged inside the conveying mechanism (1); the positioning component (11) is used to position the bottom of the cup holder (2); and the blocking component (12) is used to block the cup holder (2) that has been conveyed to its position.

6. A vacuum side leakage detection method according to claim 5, characterized in that: The positioning assembly (11) comprises a fixing plate (111) fixed to the conveying mechanism (1), a positioning plate (112) is arranged above the fixing plate (111), a cylinder (113) is fixed at the center of the lower end surface of the fixing plate (111), the protruding end of the cylinder (113) is fixedly connected to the positioning plate (112), and a plurality of positioning columns are fixed to the upper end surface of the positioning plate (112), and the positioning columns correspond to the bottom holes of the cup holder (2); The blocking assembly (12) comprises two cylinders (121) fixed near the output direction of the conveying mechanism (1), the upper end of the cylinder (121) being rotatably connected to a blocking block (122), and the lower end of the blocking block (122) being fixedly connected to the protruding end of the cylinder (121).

7. A vacuum side leakage detection method according to claim 1, characterized in that: The following steps are involved: S1, the cup holder (2) is transported to the detection area by the transport mechanism (1) and positioned; S2, the gas injection head (41) is moved to the first row of liquid injection holes by the moving mechanism (3), the lifting mechanism (5) drives the gas injection head (41) to be lowered to communicate with the liquid injection holes, and the booster pump (45) is started to inject gas of a certain pressure; S3, when the pressure of the gas reaches the set value, the inflation is stopped. After a period of stabilization, the pressure change is monitored through the data of the pressure sensor (42). If the sealing is good, the pressure will remain relatively stable; if there is a leak, the pressure will drop; S4, after the detection of the previous row is completed, the gas injection head (41) is separated from the cup holder (2), and moved to the next row of detection holes through the moving mechanism (3) and the lifting mechanism (5), and steps S2 and S3 are repeated; S5. After the sealing of each set of cups and capacitors has been tested, the conveying mechanism (1) outputs the set of cup racks (2), and the pressure testing mechanism (4) returns to the initial position, waiting for the next set of set of cup racks (2) to enter.

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