A negative pressure pipeline leak testing device and method for forming equipment

Abstract

The present invention provides a negative pressure pipeline leak plugging test device and method in the technical field of formation equipment. The device includes: a frame body; a PLC disposed inside the frame body; a conversion mechanism disposed at the upper end of the frame body; an air circuit cut-off valve communicated with the conversion mechanism and connected to the PLC; a flow meter disposed on the side of the frame body, with the detection end respectively communicated with one end of an air circuit cut-off valve and the control end connected to the PLC; a pressure gauge disposed on the side of the frame body, with the detection end communicated with the conversion mechanism and the control end connected to the PLC; a power supply and communication interface disposed at the bottom end of the frame body; a power supply module disposed inside the frame body and respectively connected to the PLC, the air circuit cut-off valve, the flow meter, the pressure gauge, and the power supply and communication interface; a debugging module disposed on the side of the frame body and connected to the PLC; a switch disposed inside the frame body, with one end connected to the power supply and communication interface and the debugging module, and the other end connected to the PLC. The advantages of the present invention are: greatly improving the efficiency, quality, and compatibility of the negative pressure pipeline leak plugging test.

Description

Technical Field

[0001] The present invention relates to the technical field of formation equipment, and particularly to a negative pressure pipeline leakage plugging test equipment and method for formation equipment. Background Art

[0002] With the rapid development of new energy, square power batteries occupy a large share due to their unique advantages. After the production of square power batteries is completed, formation equipment is required to activate them. During the formation process, the electrolyte inside the battery cells will remain in the formation equipment, resulting in the blockage of the negative pressure pipeline of the formation equipment. During the long-term use of the formation equipment, there is also a situation of electrolyte leakage, which will directly affect the formation quality. Therefore, it is necessary to test the blockage and leakage of the negative pressure pipeline of the formation equipment.

[0003] For the blockage and leakage test of the negative pressure pipeline of the formation equipment, traditionally, a blockage test tooling and a leakage test tooling are respectively used to measure pressure and flow, and then further judgment is made. There are the following disadvantages: 1. Using two toolings for testing separately makes the testing process extremely cumbersome; 2. Traditionally, only the negative pressure main pipeline of the formation equipment is connected for testing, and the situation of a small amount of blockage cannot be detected, nor can the leakage plugging situation of each negative pressure branch pipeline be measured; 3. It can only be compatible with formation equipment with a fixed number of channels, and the compatibility is poor.

[0004] Therefore, how to provide a negative pressure pipeline leakage plugging test equipment and method for formation equipment to improve the efficiency, quality, and compatibility of the negative pressure pipeline leakage plugging test has become an urgent technical problem to be solved. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a negative pressure pipeline leakage plugging test equipment and method for formation equipment to improve the efficiency, quality, and compatibility of the negative pressure pipeline leakage plugging test.

[0006] In a first aspect, the present invention provides a negative pressure pipeline leakage plugging test equipment for formation equipment, including:

[0007] A frame;

[0008] A PLC, disposed inside the frame;

[0009] A conversion mechanism, disposed at the upper end of the frame;

[0010] A plurality of gas path cut-off valves, communicated with the conversion mechanism and connected to the PLC;

[0011] A plurality of flow meters, disposed on the side of the frame, with the detection ends respectively communicated with one end of a gas path cut-off valve, and the control ends connected to the PLC;

[0012] Several pressure gauges are provided on the side of the frame body, with the detection end communicating with the tool change mechanism and the control end connected to the PLC;

[0013] Two power-taking communication interfaces are provided at the bottom end of the frame body;

[0014] A power supply module is provided inside the frame body and is respectively connected to the PLC, the pneumatic circuit cut-off valve, the flow meter, the pressure gauge, and the power-taking communication interface;

[0015] A debugging module is provided on the side of the frame body and is connected to the PLC;

[0016] A switch is provided inside the frame body. One end is connected to the power-taking communication interface and the debugging module, and the other end is connected to the PLC.

[0017] Furthermore, four handles are symmetrically provided on the side of the frame body.

[0018] Furthermore, the tool change mechanism includes:

[0019] A pair of guide rails are provided in parallel at the upper end of the frame body;

[0020] Two support plates are respectively slidably connected to one of the guide rails at both ends and are provided with several mounting holes;

[0021] Several nozzle fixing blocks are detachably connected to the support plate through the mounting holes and are provided with a through hole penetrating from top to bottom;

[0022] Several three-way joints are respectively communicated with one of the through holes, the pneumatic circuit cut-off valve, and the pressure gauge.

[0023] Furthermore, the tool change mechanism further includes:

[0024] At least two pointers are symmetrically provided at both ends of the support plate;

[0025] At least two scales are horizontally provided at the top end of the side of the frame body and are located on the side where the pointers point.

[0026] Furthermore, the power supply module includes:

[0027] A main circuit breaker, with one end connected to the two power-taking communication interfaces;

[0028] A first switching power supply, with one end connected to the other end of the main circuit breaker;

[0029] A second switching power supply, with one end connected to the other end of the main circuit breaker;

[0030] A first sub - circuit breaker, one end of which is connected to the other end of the first switching power supply, and the other end is respectively connected to the PLC, the flow meter and the pressure gauge;

[0031] A second sub - circuit breaker, one end of which is connected to the other end of the second switching power supply, and the other end is connected to the gas circuit cut - off valve.

[0032] Further, the debugging module includes:

[0033] A debugging port, which is arranged on the side of the housing and is connected to the switch;

[0034] A reset indicator light, which is arranged on the side of the housing and is connected to the PLC;

[0035] A reset button, which is arranged on the side of the housing and is connected to the PLC.

[0036] In a second aspect, the present invention provides a method for leak - plugging test of the negative - pressure pipeline of a forming device, including the following steps:

[0037] Step S10: Connect the power - taking communication interface to the power supply and the upper computer, adjust the position of the support plate through the pointer and the scale, press each nozzle fixing block against the corresponding negative - pressure cup of the forming device, and thus communicate with the negative - pressure pipeline of the forming device;

[0038] Step S20: The PLC opens the gas circuit cut - off valve, controls the forming device to draw negative pressure through the upper computer, and maintains for a certain period of time until the flow of the forming device is stable;

[0039] Step S30: The PLC records the flow values of each channel through the flow meter, and tests the blockage condition of the negative - pressure pipeline based on the flow values;

[0040] Step S40: The PLC closes the gas circuit cut - off valve, controls the negative pressure of the forming device to be stable at the set pressure threshold through the upper computer, and then closes the negative - pressure valve of the forming device;

[0041] Step S50: The PLC records the pressure values of each channel through the pressure gauge, and tests the leakage condition of the negative - pressure pipeline based on the pressure values;

[0042] Step S60: The PLC opens the gas circuit cut - off valve to relieve the pressure to atmospheric pressure, and ends the test.

[0043] Further, step S30 specifically includes:

[0044] Step S31: The PLC records the flow values of each channel through the flow meter, judges whether each flow value is greater than a preset flow threshold. If so, enter step S32; if not, generate a test result of blockage of the main negative - pressure pipeline;

[0045] Step S32, select the maximum flow value from each of the flow values, and determine whether the deviation between each of the flow values ​​and the maximum flow value is greater than a preset proportional threshold. If so, generate a test result of blockage of the negative pressure branch pipe of the corresponding channel; if not, generate a test result of no blockage.

[0046] Furthermore, the step S50 is specifically as follows:

[0047] The PLC records the pressure value of each channel in real time through a pressure gauge, and determines whether the decreasing speed of the pressure value of each channel exceeds the set value. If so, a test result indicating that there is a leakage in the negative pressure pipeline is generated; if not, a test result indicating that there is no leakage in the negative pressure pipeline is generated.

[0048] The advantages of the present invention are:

[0049] 1. By setting a number of nozzle fixing blocks, gas circuit shut-off valves, flow meters and pressure gauges, the gas circuit (through hole) of the nozzle fixing block is opened and closed by the gas circuit shut-off valve. When the gas circuit is opened, the flow meter is used to automatically test whether there is a blockage. When the gas circuit is closed, the pressure gauge is used to automatically test whether there is a leak. That is, the two functions of blockage test and leakage test are integrated, and there is no need to switch two tooling for testing as traditionally, thereby greatly improving the efficiency of the negative pressure pipeline plugging test; since a number of nozzle fixing blocks are set, they can be connected to each channel (negative pressure cup) of the formation equipment for testing at the same time, which can not only detect a small amount of blockage, but also the plugging and leakage of each channel, thereby greatly improving the quality of the negative pressure pipeline plugging test.

[0050] 2. By setting up a changing mechanism including a guide rail, a support plate and a nozzle fixing block, the nozzle fixing block can be linked to adjust its position by sliding the support plate on the guide rail, and a number of mounting holes are provided on the support plate. The nozzle fixing block can be installed on a specific mounting hole as needed to adjust the distance between the nozzle fixing blocks to adapt to different models and different numbers of channels of chemical equipment, thereby greatly improving the compatibility of the negative pressure pipeline leak plugging test. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The present invention will be further described below in conjunction with embodiments with reference to the accompanying drawings.

[0052] Figure 1 It is a top view of a negative pressure pipeline leak plugging testing device for formation equipment of the present invention.

[0053] Figure 2 It is a front view of a negative pressure pipeline leak plugging testing device for formation equipment of the present invention.

[0054] Figure 3 It is a side view of a negative pressure pipeline leak plugging testing device for formation equipment of the present invention.

[0055] Figure 4 It is a schematic diagram of the power supply communication interface of the present invention.

[0056] Figure 5 The invention discloses a circuit principle block diagram of a negative pressure pipeline leakage plugging test device for forming equipment.

[0057] Figure 6 The present invention is a flow chart of a method for testing leakage of a negative pressure pipeline of a formation equipment.

[0058] Marking Description:

[0059] 100-A negative pressure pipeline plugging and leak testing device for a formation equipment, 1-frame, 2-PLC, 3-changing mechanism, 4-gas circuit stop valve, 5-flow meter, 6-pressure gauge, 7-power supply communication interface, 8-power module, 9-debugging module, 10-switch, 11-handle, 31-guide rail, 32-support plate, 33-nozzle fixing block, 34-pointer, 35-scale, 321-mounting hole, 331-through hole, 81-main circuit breaker, 82-first switch power supply, 83-second switch power supply, 84-first sub-circuit breaker, 85-second sub-circuit breaker, 91-debugging port, 92-reset indicator light, 93-reset button. DETAILED DESCRIPTION

[0060] The technical solution in the embodiment of the present application has the following overall idea: a flow meter 5 and a pressure gauge 6 are set to integrate the two functions of blockage test and leakage test, without switching two toolings, so as to improve the efficiency of the negative pressure pipeline plugging test; a plurality of suction nozzle fixing blocks 33 are set to be connected to each channel of the formation equipment at the same time, which can not only detect a small amount of blockage, but also measure the plugging condition of each channel, so as to improve the quality of the negative pressure pipeline plugging test; a support plate 32 is set to slide on the guide rail 31 to link the suction nozzle fixing block 33 to adjust the position, and a plurality of mounting holes 321 are provided on the support plate 32 for free disassembly and assembly of the suction nozzle fixing block 33, and the spacing between the suction nozzle fixing blocks 33 is adjusted to improve the compatibility of the negative pressure pipeline plugging test.

[0061] Please refer to Figures 1 to 6 As shown, a preferred embodiment of a negative pressure pipeline plugging test device 100 for a chemical formation equipment of the present invention comprises:

[0062] A frame 1, used to carry the test device 100;

[0063] A PLC 2 is provided in the frame 1 and is used to control the operation of the test device 100. In specific implementation, a PLC that can realize this function can be selected from the prior art without being limited to any model. The control program is well known to those skilled in the art and can be obtained by those skilled in the art without creative labor.

[0064] A type changing mechanism 3, disposed at the upper end of the frame 1, for adjusting the position and spacing of the nozzle fixing block 33 to adapt to different types of chemical forming equipment (not shown);

[0065] A plurality of gas circuit shut-off valves 4 are connected to the mold changing mechanism 3 and the PLC 2, and are used to open and close the gas circuit connected to the formation equipment;

[0066] A plurality of flow meters 5 are arranged on the side of the frame 1, the detection ends of which are respectively connected to one end of the gas circuit stop valve 4, and the control ends are connected to the PLC 2, for detecting whether the negative pressure pipeline of the formation equipment is blocked;

[0067] A plurality of pressure gauges 6 are arranged on the side of the frame 1, the detection end is connected to the mold changing mechanism 3, and the control end is connected to the PLC 2, and is used to detect whether there is leakage in the negative pressure pipeline of the formation equipment;

[0068] Two power communication interfaces 7 are provided at the bottom of the frame 1 and are used to connect a power source (not shown) to supply power to the test device 100 and to enable the test device 100 to communicate with the outside world;

[0069] A power module 8, disposed in the frame 1, connected to the PLC 2, the gas circuit shut-off valve 4, the flow meter 5, the pressure gauge 6 and the power supply communication interface 7, for switching on and off the power supply of the test device 100;

[0070] A debugging module 9, arranged on the side of the frame 1 and connected to the PLC 2;

[0071] A switch 10 is arranged in the frame 1, one end of which is connected to the power supply communication interface 7 and the debugging module 9, and the other end is connected to the PLC 2, and is used for the test device 100 to communicate with the outside world.

[0072] Four handles 11 are symmetrically provided on the side of the frame 1 to facilitate carrying the testing device 100 .

[0073] The type-changing mechanism 3 comprises:

[0074] A pair of guide rails 31 are arranged parallel to the upper end of the frame 1 and are used for limiting the sliding of the support plate 32;

[0075] Two support plates 32, both ends of which are slidably connected to one of the guide rails 31, and are provided with a plurality of mounting holes 321 for mounting the nozzle fixing block 33;

[0076] A plurality of nozzle fixing blocks 33 are detachably connected to the support plate 32 through the mounting hole 321 and are provided with a through hole 331 extending from top to bottom;

[0077] A number of three-way connectors (not shown) are respectively connected to the through hole 331, the gas path cut-off valve 4, and the pressure gauge 6. The nozzle fixing block 33 is used to press-fit with a negative pressure cup (not shown) of the forming equipment, that is, to connect the through hole 331 to the negative pressure pipeline of the forming equipment to form a gas path.

[0078] The model change mechanism 3 further includes:

[0079] At least two pointers 34 are symmetrically arranged at both ends of the support plate 32 and are used to indicate the sliding position of the support plate 32;

[0080] At least two scales 35 are horizontally arranged at the top of the side surface of the frame 1 and are located on the side surface pointed by the pointer 34, which is convenient for accurately adjusting the position of the model change mechanism 3 before the test equipment 100 is placed in the storage location.

[0081] The power supply module 8 includes:

[0082] A main circuit breaker 81, one end of which is connected to the two power-taking communication interfaces 7;

[0083] A first switching power supply 82, one end of which is connected to the other end of the main circuit breaker 81;

[0084] A second switching power supply 83, one end of which is connected to the other end of the main circuit breaker 81; the outputs of the first switching power supply 82 and the second switching power supply 83 are both DC24V to ensure electrical safety;

[0085] A first branch circuit breaker 84, one end of which is connected to the other end of the first switching power supply 82, and the other end is respectively connected to the PLC 2, the flow meter 5, and the pressure gauge 6;

[0086] A second branch circuit breaker 85, one end of which is connected to the other end of the second switching power supply 83, and the other end is connected to the gas path cut-off valve 4, that is, to supply power to the gas path cut-off valve 4.

[0087] The debugging module 9 includes:

[0088] A debugging port 91 is arranged on the side surface of the frame 1 and is connected to the switch 10, and is used to connect a debugging device (not shown) to debug the test equipment 100;

[0089] A reset indicator light 92 is arranged on the side surface of the frame 1 and is connected to the PLC 2, and is used to indicate the reset state of the test equipment 100;

[0090] A reset button 93 is arranged on the side surface of the frame 1 and is connected to the PLC 2, and is used to perform a reset operation on the test equipment 100.

[0091] A preferred embodiment of a method for testing leakage of a negative pressure pipeline of a formation equipment according to the present invention comprises the following steps:

[0092] Step S10, connecting the power communication interface to the power supply and the host computer, adjusting the position of the support plate by means of the pointer and the scale, pressing each nozzle fixing block with the negative pressure cup corresponding to the formation equipment, and then connecting with the negative pressure pipeline of the formation equipment; that is, performing power-on initialization operation on the test equipment;

[0093] Step S20, the PLC conducts the gas circuit stop valve, and controls the formation equipment to draw negative pressure through the host computer, and maintains it for a certain period of time until the flow of the formation equipment is stable;

[0094] Step S30, the PLC records the flow value of each channel through the flow meter, and tests the blockage of the negative pressure pipeline based on the flow value; during the test, the flow meter displays the flow value in real time;

[0095] Step S40, the PLC closes the gas circuit stop valve, and after the negative pressure of the formation equipment is stabilized at a set pressure threshold by controlling the upper computer, the negative pressure valve of the formation equipment is closed;

[0096] Step S50, the PLC records the pressure value of each channel through a pressure gauge, and tests the leakage of the negative pressure pipeline based on the pressure value; during the test, the pressure gauge displays the pressure value in real time;

[0097] Step S60, the PLC conducts the air circuit shut-off valve to release the pressure to normal pressure, and the test ends.

[0098] The step S30 specifically includes:

[0099] Step S31, PLC records the flow value of each channel through the flow meter, and determines whether each flow value is greater than a preset flow threshold. If so, it proceeds to step S32; if not, it generates a test result of negative pressure main pipeline blockage;

[0100] Step S32, select the maximum flow value from each of the flow values, and determine whether the deviation between each of the flow values ​​and the maximum flow value is greater than a preset proportional threshold. If so, generate a test result of blockage of the negative pressure branch pipe of the corresponding channel; if not, generate a test result of no blockage.

[0101] The step S50 is specifically as follows:

[0102] The PLC records the pressure value of each channel in real time through a pressure gauge, and determines whether the decreasing speed of the pressure value of each channel exceeds the set value. If so, a test result indicating that there is a leakage in the negative pressure pipeline is generated; if not, a test result indicating that there is no leakage in the negative pressure pipeline is generated.

[0103] In summary, the advantages of the present invention are:

[0104] 1. By setting a number of nozzle fixing blocks, gas circuit shut-off valves, flow meters and pressure gauges, the gas circuit (through hole) of the nozzle fixing block is opened and closed by the gas circuit shut-off valve. When the gas circuit is opened, the flow meter is used to automatically test whether there is a blockage. When the gas circuit is closed, the pressure gauge is used to automatically test whether there is a leak. That is, the two functions of blockage test and leakage test are integrated, and there is no need to switch two tooling for testing as traditionally, thereby greatly improving the efficiency of the negative pressure pipeline plugging test; since a number of nozzle fixing blocks are set, they can be connected to each channel (negative pressure cup) of the formation equipment for testing at the same time, which can not only detect a small amount of blockage, but also the plugging and leakage of each channel, thereby greatly improving the quality of the negative pressure pipeline plugging test.

[0105] 2. By setting up a changing mechanism including a guide rail, a support plate and a nozzle fixing block, the nozzle fixing block can be linked to adjust its position by sliding the support plate on the guide rail, and a number of mounting holes are provided on the support plate. The nozzle fixing block can be installed on a specific mounting hole as needed to adjust the distance between the nozzle fixing blocks to adapt to different models and different numbers of channels of chemical equipment, thereby greatly improving the compatibility of the negative pressure pipeline leak plugging test.

[0106] Although the specific implementation modes of the present invention are described above, those skilled in the art should understand that the specific implementation modes described are only illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A leak plugging test device for the negative pressure pipeline of a forming device, characterized in that: Comprising: A housing; four handles are symmetrically arranged on the side surface of the housing; A PLC, arranged inside the housing; A tool changing mechanism, arranged at the upper end of the housing; A number of pneumatic circuit cut-off valves, communicating with the tool changing mechanism and connected to the PLC; A number of flow meters, arranged on the side surface of the housing, with the detection ends respectively communicating with one end of a pneumatic circuit cut-off valve, and the control ends connected to the PLC; A number of pressure gauges, arranged on the side surface of the housing, with the detection ends communicating with the tool changing mechanism and the control ends connected to the PLC; Two power-taking communication interfaces, arranged at the bottom end of the housing; A power supply module, arranged inside the housing, and respectively connected to the PLC, pneumatic circuit cut-off valves, flow meters, pressure gauges and power-taking communication interfaces; A debugging module, arranged on the side surface of the housing and connected to the PLC; A switch, arranged inside the housing, with one end connected to the power-taking communication interface and the debugging module, and the other end connected to the PLC; The tool changing mechanism includes: A pair of guide rails, arranged in parallel at the upper end of the housing; Two support plates, with both ends respectively slidingly connected to a guide rail and provided with a number of mounting holes; A number of nozzle fixing blocks, detachably connected to the support plates through the mounting holes, and provided with a through hole running through from top to bottom; A number of three-way joints, respectively communicating with a through hole, pneumatic circuit cut-off valves and pressure gauges; At least two pointers, symmetrically arranged at both ends of the support plate; At least two scales, horizontally arranged at the top end of the side surface of the housing and located on the side surface pointed by the pointer.

2. The leak stoppage testing device for the negative pressure pipeline of formation equipment according to claim 1, wherein: The power supply module includes: A main circuit breaker, with one end connected to the two power-taking communication interfaces; A first switching power supply, with one end connected to the other end of the main circuit breaker; A second switching power supply, with one end connected to the other end of the main circuit breaker; A first branch circuit breaker, with one end connected to the other end of the first switching power supply and the other end respectively connected to the PLC, flow meters and pressure gauges; A second branch circuit breaker, with one end connected to the other end of the second switching power supply and the other end connected to the pneumatic circuit cut-off valves.

3. The leak stoppage testing device for the negative pressure pipeline of formation equipment according to claim 1, characterized in that: The debugging module includes: A debugging port, arranged on the side surface of the housing and connected to the switch; A reset indicator light, arranged on the side surface of the housing and connected to the PLC; A reset button, arranged on the side surface of the housing and connected to the PLC.

4. A method for testing leakage in negative pressure pipelines of formation equipment, characterized in that: The method needs to use the testing equipment as described in any one of claims 1 to 3, and includes the following steps: Step S10: Connect the power-taking communication interface to the power supply and the upper computer, adjust the position of the support plate through the pointer and the scale, press each nozzle fixing block against the corresponding negative pressure cup of the forming equipment, and thus communicate with the negative pressure pipeline of the forming equipment; Step S20: The PLC opens the pneumatic circuit cut-off valves, controls the forming equipment to draw negative pressure through the upper computer, and maintains for a certain period of time until the flow of the forming equipment is stable; Step S30: The PLC records the flow values of each channel through the flow meters, and tests the blockage condition of the negative pressure pipeline based on the flow values. Step S40: The PLC closes the gas circuit stop valve. After controlling the negative pressure of the formation equipment to be stable at the set pressure threshold through the host computer, the negative pressure valve of the formation equipment is closed. Step S50: The PLC records the pressure values of each channel through the pressure gauge and tests the leakage condition of the negative pressure pipeline based on the pressure values. Step S60: The PLC opens the gas circuit stop valve to relieve the pressure to atmospheric pressure and ends the test.

5. The leak stoppage test method for the negative pressure pipeline of formation equipment according to claim 4, wherein: The specific content of step S30 includes: Step S31: The PLC records the flow values of each channel through the flow meter, and determines whether each flow value is greater than the preset flow threshold. If so, it proceeds to step S32; if not, a test result of blockage in the main negative pressure pipeline is generated. Step S32: Select the maximum flow value from each flow value, and determine whether the deviation between each flow value and the maximum flow value is greater than the preset ratio threshold. If so, a test result of blockage in the corresponding channel's negative pressure branch pipeline is generated; if not, a test result of no blockage is generated.

6. A formation equipment negative pressure pipeline leak stoppage test method as described in claim 4, characterized in that: The specific content of step S50 is: The PLC records the pressure values of each channel in real time through the pressure gauge, and determines whether the pressure drop rate of each channel exceeds the set value. If so, a test result of leakage in the negative pressure pipeline is generated; if not, a test result of no leakage in the negative pressure pipeline is generated.

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