Airtightness checking and vacuumizing device applied to sectional type sealing body

Abstract

The utility model relates to an airtightness checking and vacuumizing device applied to a sectional type sealing body. The airtightness checking and vacuumizing device comprises a nitrogen tank, a pressure reducing valve, a flow dividing valve, an inflation electromagnetic valve set, a pressure sensor set, an inflation connector set, a vacuum pump, an air exhaust electromagnetic valve, a vacuum sensor, an air exhaust connector and a PLC. According to the technical scheme, an automatic device is used for replacing a traditional mode of manually operating a high-pressure nitrogen cylinder and manually regulating pressure, the air inflation electromagnetic valve and the air exhaust electromagnetic valve are controlled in a centralized mode through the PLC, one-button type air inflation / vacuumizing operation can be achieved, a large amount of manual cooperation operation is not needed, and the working efficiency is improved while the labor cost is reduced. According to the technical scheme, the pressure / vacuum upper and lower limit threshold values can be set, the PLC automatically judges the standard reaching state, closed-loop control is achieved through the PLC, the pressure sensor set and the vacuum sensor, and compared with manual staring and manual pressure adjustment, higher precision and stability are achieved.

Description

Technical Field

[0001] This application relates to the field of military equipment technology, and in particular to an airtightness inspection and vacuuming device for segmented sealing bodies. Background Technology

[0002] Due to engineering requirements, a segmented sealing body used in military equipment requires airtightness checks on its head, middle, and rear sections. After passing the airtightness test, the middle section needs to be evacuated and filled with nitrogen. Currently, the airtightness and nitrogen filling operations for this type of equipment rely on manual labor or semi-automatic equipment, which presents the following problems: First, the work efficiency is low. Due to engineering requirements, this segmented sealing body must undergo airtightness checks and vacuuming before use. Currently, filling the sealing body relies on commercially available high-pressure nitrogen cylinders (15MPa), requiring three people to operate, slowly adjusting the pressure reducing valve, while one person constantly monitors the pressure gauge to adjust the pressure to 0.02-0.2MPa to complete the filling of each section of the sealing body. Second, there is no dedicated vacuuming equipment for the middle section, and the existing equipment has a high failure rate and low vacuuming efficiency. Therefore, the entire airtightness inspection and vacuuming process suffers from low pressure control accuracy and low automation, particularly facing challenges such as standardized assurance, equipment constraints during large-scale operations, high manpower consumption, and low work efficiency. Secondly, operational safety is low. Throughout the operation, the operator needs to frequently adjust the output pressure of the high-pressure nitrogen cylinder (15MPa) to meet the filling pressure requirements, posing a potential safety hazard to both the operator and the precision sensitive components within the equipment. Utility Model Content

[0003] To at least partially overcome the problems of low efficiency and low operational safety in manual airtightness inspection and vacuuming of segmented sealing bodies in related technologies, this application provides an airtightness inspection and vacuuming device for segmented sealing bodies.

[0004] The proposed solution is as follows:

[0005] An airtightness inspection and vacuuming device for segmented sealing bodies, comprising:

[0006] Nitrogen tank, pressure reducing valve, diverter valve, inflation solenoid valve assembly, pressure sensor assembly, inflation connector assembly, vacuum pump, vacuum solenoid valve, vacuum sensor, vacuum connector and PLC controller;

[0007] The inflation solenoid valve assembly includes: a first inflation solenoid valve, a second inflation solenoid valve, and a third inflation solenoid valve.

[0008] The pressure sensor group includes: a first pressure sensor, a second pressure sensor, and a third pressure sensor;

[0009] The inflation connector assembly includes: a first inflation connector, a second inflation connector, and a third inflation connector;

[0010] The nitrogen cylinder is connected to the pressure reducing valve via a pipeline;

[0011] The pressure reducing valve is connected to the diverting valve via a pipe;

[0012] The diversion valve is connected to the first inflation solenoid valve, the second inflation solenoid valve and the third inflation solenoid valve through a pipeline.

[0013] The first inflation solenoid valve, the second inflation solenoid valve, and the third inflation solenoid valve are respectively connected to the first inflation connector, the second inflation connector, and the third inflation connector via pipes.

[0014] The first inflation connector, the second inflation connector, and the third inflation connector are respectively connected to the head cavity, the middle cavity, and the rear cavity of the segmented sealing body;

[0015] The first pressure sensor, the second pressure sensor, and the third pressure sensor are respectively installed in the head cavity, the middle cavity, and the rear cavity of the segmented sealing body;

[0016] The vacuum sensor is located in the middle section of the segmented sealed body.

[0017] The vacuum pump is connected to the suction solenoid valve via a pipe;

[0018] The air extraction solenoid valve is connected to the air extraction connector via a pipe.

[0019] The air extraction connector is connected to the middle section cavity of the segmented sealing body;

[0020] The PLC controller is electrically connected to the inflation solenoid valve group, the pressure sensor group, and the suction solenoid valve.

[0021] The segmented sealing body has an internal sealing structure that prevents gas flow between the head cavity, middle cavity, and rear cavity.

[0022] Preferably, the PLC controller includes:

[0023] Timing circuit;

[0024] The first pressure sensor, the second pressure sensor, and the third pressure sensor are respectively disposed on the outer sides of the head cavity, the middle cavity, and the rear cavity of the segmented sealing body;

[0025] The vacuum sensor is located on the outer side of the middle section cavity of the segmented sealed body.

[0026] Preferably, the device further includes:

[0027] Nitrogen generator;

[0028] The nitrogen generator is connected to the nitrogen tank via a pipeline.

[0029] Preferably, the device further includes:

[0030] Console;

[0031] The console includes: a touch screen and a power switch;

[0032] The console is electrically connected to the PLC controller.

[0033] Preferably, the console further includes:

[0034] Manual switches and pressure adjustment knobs for each valve.

[0035] Preferably, the device further includes:

[0036] Nitrogen tank pressure sensor and pipeline pressure sensor;

[0037] The nitrogen tank pressure sensor is installed inside the nitrogen tank.

[0038] The pipeline pressure sensors are installed inside each pipeline;

[0039] The PLC controller is electrically connected to the nitrogen tank pressure sensor and the pipeline pressure sensor;

[0040] The console also includes:

[0041] Nitrogen tank pressure gauge and pipeline pressure gauge.

[0042] Preferably, the console further includes:

[0043] Pressure gauges for the first, middle, and final sections of the segmented sealing body.

[0044] Preferably, the device further includes:

[0045] Multiple safety valves;

[0046] The safety valves are installed on each pipeline.

[0047] Preferably, the device further includes:

[0048] Sealed enclosure;

[0049] The sealed housing is provided with a workstation for placing segmented sealing bodies.

[0050] The inflation connector assembly is located inside the sealed box.

[0051] The technical solution provided in this application may include the following beneficial effects:

[0052] When implementing this technical solution, the segmented sealing body is placed on the work station, and each segment of the cavity is connected to the corresponding inflation connector.

[0053] During inflation, nitrogen in the nitrogen tank is depressurized by a pressure reducing valve and then enters a diversion valve. The diversion valve distributes the nitrogen to each inflation solenoid valve. The PLC controller controls the opening of the inflation solenoid valves, and the nitrogen enters each cavity of the segmented sealing body through the inflation solenoid valves and inflation connectors. At this time, the PLC controller uses a pressure sensor array to obtain the pressure level at each cavity of the segmented sealing body to perform an airtightness check on the segmented sealing body.

[0054] When evacuating, the vacuum pump is turned on, and the PLC controller controls the evacuation solenoid valve to open. The vacuum pump extracts nitrogen from the middle section cavity of the segmented sealed body through the evacuation solenoid valve and the evacuation connector. At the same time, the PLC controller obtains the pressure level of the middle section cavity of the segmented sealed body through the vacuum sensor to ensure that a vacuum is achieved.

[0055] This technical solution replaces the traditional manual operation of high-pressure nitrogen cylinders and manual pressure adjustment with an automated device. It utilizes a PLC controller to centrally control the filling and vacuuming solenoid valves, enabling "one-button filling / vacuuming operation" without requiring extensive manual intervention, thus reducing labor costs and improving work efficiency. This solution allows setting upper and lower pressure / vacuum thresholds, with the PLC automatically determining whether the thresholds are met. The closed-loop control using the PLC controller, pressure sensor group, and vacuum sensor provides higher accuracy and stability compared to manual monitoring and pressure adjustment.

[0056] All operations are performed through a remote control panel or PLC controller, eliminating the need for frequent operator intervention, avoiding potential high-voltage hazards, and reducing safety risks associated with precision and sensitive components within the equipment.

[0057] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0058] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0059] Figure 1 This is a schematic diagram of a structure of an airtightness inspection and vacuuming device for a segmented sealing body provided in one embodiment of this application;

[0060] Figure 2 This is a schematic diagram of a structure for an airtightness inspection and vacuuming device applied to a segmented sealing body, provided in another embodiment of this application.

[0061] Reference numerals in the attached diagram: Nitrogen tank-1; Pressure reducing valve-2; Diverter valve-3; First filling solenoid valve-401; Second filling solenoid valve-402; Third filling solenoid valve-403; First pressure sensor-501; Second pressure sensor-502; Third pressure sensor-503; First filling connector-601; Second filling connector-601; Third filling connector-603; Vacuum pump-7; Suction solenoid valve-8; Vacuum sensor-9; Suction connector-10; PLC controller-11; Nitrogen generator-12; Control console-13. Detailed Implementation

[0062] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0063] An airtightness inspection and vacuuming device for segmented sealing bodies, comprising:

[0064] Nitrogen tank 1, pressure reducing valve 2, diverter valve 3, inflation solenoid valve group, pressure sensor group, inflation connector group, vacuum pump 7, evacuation solenoid valve 8, vacuum sensor 9, evacuation connector 10, and PLC controller 11;

[0065] The inflation solenoid valve assembly includes: a first inflation solenoid valve 401, a second inflation solenoid valve 402 and a third inflation solenoid valve 403.

[0066] The pressure sensor group includes: a first pressure sensor 501, a second pressure sensor 502, and a third pressure sensor 503;

[0067] The inflation connector assembly includes: a first inflation connector 601, a second inflation connector 602, and a third inflation connector 603;

[0068] Nitrogen cylinder 1 is connected to pressure reducing valve 2 via a pipeline;

[0069] Pressure reducing valve 2 is connected to flow divider valve 3 via a pipeline;

[0070] The diversion valve 3 is connected to the first inflation solenoid valve 401, the second inflation solenoid valve 402 and the third inflation solenoid valve 403 through a pipeline.

[0071] The first inflation solenoid valve 401, the second inflation solenoid valve 402 and the third inflation solenoid valve 403 are respectively connected to the first inflation connector 601, the second inflation connector 602 and the third inflation connector 603 via pipes.

[0072] The first inflation connector 601, the second inflation connector 602, and the third inflation connector 603 are respectively connected to the head cavity, the middle cavity, and the rear cavity of the segmented sealing body;

[0073] The first pressure sensor 501, the second pressure sensor 502, and the third pressure sensor 503 are respectively installed in the head cavity, the middle cavity, and the rear cavity of the segmented sealing body;

[0074] Vacuum sensor 9 is located in the middle section of the segmented sealed body;

[0075] Vacuum pump 7 is connected to vacuum solenoid valve 8 via a pipe;

[0076] The vacuum solenoid valve 8 is connected to the vacuum connector 10 via a pipe;

[0077] The air extraction connector 10 connects to the middle section cavity of the segmented sealing body;

[0078] PLC controller 11 is electrically connected to the inflation solenoid valve group, the pressure sensor group and the vacuum solenoid valve 8;

[0079] In this segmented sealing body, the head cavity, middle cavity, and rear cavity are separated by an internal sealing structure to prevent gas flow.

[0080] When implementing this technical solution, the segmented sealing body is placed on the work station, and each segment of the cavity is connected to the corresponding inflation connector.

[0081] Reference Figure 2 The device also includes:

[0082] Nitrogen generator 12;

[0083] The nitrogen generator 12 is connected to the nitrogen tank 1 via a pipeline.

[0084] It should be noted that the nitrogen generator 12 is used to prepare qualified nitrogen gas (purity 99.99%, pressure 0.6 MPa), and then the prepared qualified nitrogen gas is introduced into the nitrogen tank 1 through a pipeline.

[0085] It should be noted that the nitrogen in nitrogen tank 1 is qualified nitrogen produced by nitrogen generator 12, with a pressure of 0.6 MPa, so it needs to be depressurized first through pressure reducing valve 2.

[0086] Generally, pressure reducing valve 2 reduces the pressure of nitrogen introduced into nitrogen tank 1 to 0.2 MPa and then delivers it to diverter valve 3.

[0087] During inflation, nitrogen in nitrogen tank 1 is depressurized by pressure reducing valve 2 and then enters diversion valve 3. Diversion valve 3 distributes the nitrogen to each inflation solenoid valve. PLC controller 11 controls the opening of the inflation solenoid valves, and nitrogen enters each cavity of the segmented sealing body through the inflation solenoid valves and inflation connectors. At this time, PLC controller 11 uses pressure sensor arrays to obtain the pressure levels at each cavity of the segmented sealing body to perform an airtightness check on the segmented sealing body.

[0088] Specifically, the PLC controller 11 can set upper and lower pressure thresholds. The PLC controller 11 automatically judges the standard status. During the inflation process, the sensors of each branch measure the pressure value of that branch in real time. When the set target pressure is reached, the inflation solenoid valve of that branch is closed until all branches are fully inflated.

[0089] It should be noted that if nitrogen gas is filled into each section of the segmented sealing body at a certain pressure and there is no leakage after holding the pressure for 10 minutes, it proves that the sealing performance of each section of the segmented sealing body is good.

[0090] When evacuating, the vacuum pump 7 is turned on, and the PLC controller 11 controls the evacuation solenoid valve 8 to open. The vacuum pump 7 extracts nitrogen from the middle section cavity of the segmented sealing body through the evacuation solenoid valve 8 and the evacuation connector 10. At the same time, the PLC controller 11 obtains the pressure level of the middle section cavity of the segmented sealing body through the vacuum sensor 9 to ensure that a vacuum is achieved.

[0091] Specifically, first, a vacuum is drawn to -0.03 MPa. At this point, the PLC controller 11 controls the vacuum solenoid valve 8 to close and controls the second inflation solenoid valve 402 to open, inflating the middle section cavity of the segmented sealing body to a certain pressure. Then, the PLC controller 11 controls the second inflation solenoid valve 402 to close and controls the vacuum solenoid valve 8 to open, drawing a vacuum to -0.03 MPa again. Finally, the PLC controller 11 controls the vacuum solenoid valve 8 to close and controls the second inflation solenoid valve 402 to open, inflating the middle section cavity of the segmented sealing body to 0 MPa, completing the vacuuming process.

[0092] This technical solution replaces the traditional manual operation of high-pressure nitrogen cylinders and manual pressure adjustment with an automated device. Utilizing a PLC controller 11 to centrally control the filling and vacuuming solenoid valves 8, it enables "one-button filling / vacuuming operation," eliminating the need for extensive manual intervention, reducing labor costs and improving work efficiency. This solution allows setting upper and lower pressure / vacuum thresholds, with the PLC automatically determining whether the thresholds are met. Closed-loop control using the PLC controller 11, pressure sensor group, and vacuum sensor 9 provides higher accuracy and stability compared to manual monitoring and pressure adjustment.

[0093] All operations are performed through a remote control panel or PLC controller 11, eliminating the need for frequent operator intervention, avoiding potential high-voltage hazards, and reducing safety risks associated with precision and sensitive components within the equipment.

[0094] In practice, the solenoid valve is an Airtac DC24V2 interface valve; the range of the first pressure sensor 501, the second pressure sensor 502, and the third pressure sensor 503 is 0-0.2 MPa, with an accuracy of ±0.5%FS; the range of the vacuum sensor 9 is -0.1-0.2 MPa, with an accuracy of ±0.5%FS; the vacuum pump 7 is a rotary vane vacuum pump 7, with a power supply voltage of AC220V / 50Hz, a pumping speed of not less than 21 Nm3 / h, an ultimate pressure of ≤1 Pa, and a weight of 40 kg; the pipeline uses a TUBE quick-connect fitting with an outer diameter of 10 mm.

[0095] Example 2

[0096] It should be noted that the PLC controller 11 includes:

[0097] Timing circuit;

[0098] The first pressure sensor 501, the second pressure sensor 502, and the third pressure sensor 503 are respectively disposed on the outer sides of the head cavity, the middle cavity, and the rear cavity of the segmented sealing body;

[0099] Vacuum sensor 9 is located on the outer side of the middle section cavity of the segmented sealing body.

[0100] Generally, in instrument measurement, in order to obtain an accurate target pressure value, a pressure sensor needs to be built into the measuring container for measurement. This method is suitable for pressure measurement of general equipment. However, for certain specific sealed bodies, it is not allowed to install sensors or other components inside them. Therefore, only remote measurement methods can be adopted. In addition, because the detection pressure is low, even the slightest leakage in the pipeline will affect the measurement accuracy of the inflation pressure. Therefore, there are certain difficulties in engineering implementation.

[0101] In this embodiment, each sensor is set on the outside of the segmented sealed cavity, and a timing circuit is configured for the PLC controller 11. The timing circuit is used to set the inflation time and delay detection time of each segment of the sealed cavity.

[0102] During implementation, the first section of the segmented sealing body is inflated for 30 seconds, then inflation is stopped. After a 3-second delay, the pressure at the first section of the segmented sealing body is checked to see if it is ≥0.05 MPa. If it is ≥0.05 MPa, inflation is complete, and inflation ends; if it is <0.05 MPa, inflation is incomplete, and inflation continues for another 3 seconds.

[0103] Stop inflating and retest after a 3-second delay.

[0104] For the middle section of the segmented seal, inflate for 50 seconds, then stop inflating. After a 3-second delay, check if the pressure at the middle section of the segmented seal is ≥0.05 MPa. If ≥0.05 MPa, inflation is complete, and the inflation process ends; if <0.05 MPa, inflation is incomplete, and inflate for another 4 seconds.

[0105] Stop inflating and retest after a 3-second delay.

[0106] For the rear cavity of the segmented seal, inflate for 50 seconds, then stop inflating. After a 3-second delay, check if the pressure at the rear cavity of the segmented seal is ≥0.05 MPa. If ≥0.05 MPa, inflation is complete, and the inflation process ends; if <0.05 MPa, inflation is incomplete, and inflate for another 4 seconds.

[0107] Stop inflating and retest after a 3-second delay.

[0108] In this embodiment, the above problems are solved by a scheme of basic inflation time + delayed sampling + supplementary inflation. It also solves the problem of the influence of the solenoid valve on the gas path disturbance at the moment of start and stop, and improves the accuracy of low-pressure remote point measurement under dynamic conditions.

[0109] Example 3

[0110] It should be noted that the device also includes:

[0111] Console 13;

[0112] The control panel 13 includes: a touch screen and a power switch;

[0113] The control console 13 is electrically connected to the PLC controller 11.

[0114] Furthermore, console 13 also includes:

[0115] Manual switches and pressure adjustment knobs for each valve.

[0116] Understandably, console 13 is used to implement human-computer interaction and system operation.

[0117] Console 13 includes:

[0118] The touch screen is used to set various control parameters of the PLC controller 11, such as pressure / vacuum upper and lower thresholds, inflation / evacuation time, and detection delay time. It can also display the gas pressure of various parts of the device, such as the total inlet pressure, regulating valve pressure, and pressure in each cavity of the segmented sealing body.

[0119] A power switch is used to control the power-on / power-off state of the device.

[0120] Manual switches are used to allow manual control of each inflation solenoid valve and deflation solenoid valve 8 when the PLC system is malfunctioning or under debugging conditions.

[0121] The pressure adjustment knob is used for fine pressure adjustment in manual mode;

[0122] The console 13 is electrically connected to the PLC controller 11, and is used to input user commands into the PLC and display the control output feedback of the PLC on the interface.

[0123] It should be noted that the touch screen also provides control buttons for manually controlling the inflation solenoid valve and the deflation solenoid valve 8.

[0124] This supplementary solution adds 13 console modules (including touch display and manual / power control) to the original automation architecture, forming a complete operating system that integrates automated control, manual emergency response, graphical interaction, and safety assurance.

[0125] It should be noted that the device also includes:

[0126] Nitrogen tank 1 pressure sensor and pipeline pressure sensor;

[0127] The pressure sensor for nitrogen tank 1 is installed inside nitrogen tank 1;

[0128] Pipeline pressure sensors are installed inside each pipeline;

[0129] PLC controller 11 is electrically connected to the pressure sensor of nitrogen tank 1 and the pipeline pressure sensor;

[0130] Console 13 also includes:

[0131] Nitrogen tank pressure gauge and pipeline pressure gauge.

[0132] In this embodiment, the pressure sensor of nitrogen tank 1 collects the high pressure data inside nitrogen tank 1 in real time. If the pressure is abnormal (such as overpressure or below the threshold), the PLC can issue an alarm signal to prompt the gas cylinder to be replaced or repaired.

[0133] By using pipeline pressure sensors to monitor the pressure output status of each pipeline in real time, it can be used to determine whether each pipeline is blocked, leaking, or has failed to regulate pressure, and to prevent overpressure damage to the seal or misoperation of inflation.

[0134] The control console 13 is equipped with a pressure gauge for the nitrogen tank 1 and a pipeline pressure gauge, allowing the operator to quickly determine the current operating condition of the equipment without entering the program interface, thus improving work efficiency.

[0135] It should be noted that console 13 also includes:

[0136] The segmented sealing body has pressure gauges for the first, middle, and last sections of the cavity.

[0137] Each pressure gauge is electrically connected to or signal-linked with the first pressure sensor 501, the second pressure sensor 502, and the third pressure sensor 503 respectively, and is used to display the pressure values ​​of each segment of the segmented sealing body in real time on the control panel 13 in the form of pointers.

[0138] Preferably, the pressure gauges for the nitrogen tank 1, pipeline, and the first, middle, and final sections of the segmented sealing body can be industrial-grade pointer-type mechanical gauges.

[0139] Example 4

[0140] It should be noted that the device also includes:

[0141] Multiple safety valves;

[0142] Safety valves are installed on each pipeline.

[0143] Safety valves are used to automatically release pressure when the internal pressure of a corresponding pipeline exceeds a preset safety value in order to protect the system pipeline and cavity structure. Safety valves can be mechanical spring-loaded safety valves or pilot-operated safety relief valves, and have the characteristics of fast response speed, simple structure and reliable reset.

[0144] Example 5

[0145] It should be noted that the device also includes:

[0146] Sealed enclosure;

[0147] The sealed housing is equipped with a workstation for placing segmented sealing elements;

[0148] The inflation connector assembly is located inside the sealed box.

[0149] The sealed housing is a closed outer shell with a workstation inside for placing segmented sealing elements.

[0150] The workstation can adopt a bracket-type, slot-type, or multi-point support structure to stably position the head cavity, middle cavity, and rear cavity of the segmented seal body, ensuring that it remains stationary during airtightness checks and vacuuming and nitrogen filling processes.

[0151] The inflation connector assembly (including the first, second, and third inflation connectors 603) is housed within the sealed enclosure and mates with the corresponding interfaces of the head section, middle section, and rear section cavities, respectively. The connectors can be connected to the sealing body via quick-connect sealing joints to complete the air circuit closure.

[0152] The sealed enclosure is equipped with a cable passage, inspection port, or removable top cover for easy installation and removal of the sealing body and routine maintenance. A control console 13 or observation window can be integrated into the exterior of the sealed enclosure for convenient status monitoring during operation.

[0153] The sealed enclosure provides a physical barrier, effectively preventing safety risks such as accidental jetting or splashing caused by high-pressure gas leaks, component failures, or operational errors.

[0154] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0155] It should be noted that in the description of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "a plurality of" means at least two.

[0156] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0157] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A device for airtightness inspection and vacuuming of segmented sealed bodies, characterized in that, include: Nitrogen tank, pressure reducing valve, diverter valve, inflation solenoid valve assembly, pressure sensor assembly, inflation connector assembly, vacuum pump, vacuum solenoid valve, vacuum sensor, vacuum connector and PLC controller; The inflation solenoid valve assembly includes: a first inflation solenoid valve, a second inflation solenoid valve, and a third inflation solenoid valve. The pressure sensor group includes: a first pressure sensor, a second pressure sensor, and a third pressure sensor; The inflation connector assembly includes: a first inflation connector, a second inflation connector, and a third inflation connector; The nitrogen cylinder is connected to the pressure reducing valve via a pipeline; The pressure reducing valve is connected to the diverting valve via a pipe; The diversion valve is connected to the first inflation solenoid valve, the second inflation solenoid valve and the third inflation solenoid valve through a pipeline. The first inflation solenoid valve, the second inflation solenoid valve, and the third inflation solenoid valve are respectively connected to the first inflation connector, the second inflation connector, and the third inflation connector via pipes. The first inflation connector, the second inflation connector, and the third inflation connector are respectively connected to the head cavity, the middle cavity, and the rear cavity of the segmented sealing body; The first pressure sensor, the second pressure sensor, and the third pressure sensor are respectively installed in the head cavity, the middle cavity, and the rear cavity of the segmented sealing body; The vacuum sensor is located in the middle section of the segmented sealed body. The vacuum pump is connected to the suction solenoid valve via a pipe; The air extraction solenoid valve is connected to the air extraction connector via a pipe. The air extraction connector is connected to the middle section cavity of the segmented sealing body; The PLC controller is electrically connected to the inflation solenoid valve group, the pressure sensor group, and the suction solenoid valve. The segmented sealing body has an internal sealing structure that prevents gas flow between the head cavity, middle cavity, and rear cavity.

2. The apparatus according to claim 1, characterized in that, The PLC controller includes: Timing circuit; The first pressure sensor, the second pressure sensor, and the third pressure sensor are respectively disposed on the outer sides of the head cavity, the middle cavity, and the rear cavity of the segmented sealing body; The vacuum sensor is located on the outer side of the middle section cavity of the segmented sealed body.

3. The apparatus according to claim 1, characterized in that, The device further includes: Nitrogen generator; The nitrogen generator is connected to the nitrogen tank via a pipeline.

4. The apparatus according to claim 1, characterized in that, The device further includes: Console; The console includes: a touch screen and a power switch; The console is electrically connected to the PLC controller.

5. The apparatus according to claim 4, characterized in that, The console also includes: Manual switches and pressure adjustment knobs for each valve.

6. The apparatus according to claim 4, characterized in that, The device further includes: Nitrogen tank pressure sensor and pipeline pressure sensor; The nitrogen tank pressure sensor is installed inside the nitrogen tank. The pipeline pressure sensors are installed inside each pipeline; The PLC controller is electrically connected to the nitrogen tank pressure sensor and the pipeline pressure sensor; The console also includes: Nitrogen tank pressure gauge and pipeline pressure gauge.

7. The apparatus according to claim 6, characterized in that, The console also includes: The segmented sealing body has pressure gauges for the first, middle, and last sections of the cavity.

8. The apparatus according to claim 1, characterized in that, The device further includes: Multiple safety valves; The safety valves are installed on each pipeline.

9. The apparatus according to claim 1, characterized in that, The device further includes: Sealed enclosure; The sealed housing is provided with a workstation for placing segmented sealing bodies. The inflation connector assembly is located inside the sealed box.

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