Portable full-automatic positive pressure protective clothing air tightness detection box

Abstract

The utility model discloses a portable full -automatic positive pressure protective clothing air tightness detection box relates to leakproofness detection technical field, include: input pipeline, output pipeline and pressure switch, the air inlet end of input pipeline is used for with the air outlet of gas source connects, the air outlet end of input pipeline is used for with the air inlet of the detected piece connects, the air inlet end of output pipeline is used for with the air outlet of the detected piece connects, the air inlet end of pressure switch is connected with the air outlet of output pipeline, the air outlet end of pressure switch is linked together with atmospheric environment, be provided with pressure switch on output pipeline, once the pressure inside the detected piece is greater than the setting of pressure switch, and pressure switch will open automatically and carry out pressure relief, has guaranteed the accuracy of the detected piece inside test pressure, and when output pipeline releases the gas in the detected piece, need not separately regulated and controlled the on-off state of input pipeline, has improved the convenience when regulating pressure.

Description

Technical Field

[0001] This utility model relates to the field of sealing test technology, and in particular to a portable fully automatic positive pressure protective clothing airtightness test box. Background Technology

[0002] Positive pressure suits are a type of personal protective equipment widely used in biopharmaceuticals, aseptic operations, high-cleanliness environments, and hazardous chemical handling. Their core function is to continuously supply clean air into the garment, creating an internal pressure higher than the external ambient pressure, thereby effectively preventing the intrusion of harmful external substances and ensuring the safety and health of the operators.

[0003] To ensure the protective effectiveness of positive pressure suits, a leak test must be performed before use. The standard procedure is to connect the air source to the air inlet of the positive pressure suit, introduce gas into the garment, maintain this for a certain period of time, and observe the pressure changes to determine if there are any leaks.

[0004] However, in existing applications, when excessive gas is supplied to the positive pressure garment, causing the internal pressure to exceed the set range, or when switching to a lower pressure for subsequent pressure testing after a period of high-pressure holding tests, operators typically have no choice but to cut off the gas supply and manually vent the gas to reduce the internal pressure. This method is not only cumbersome and time-consuming, but also prone to inaccurate pressure adjustment affecting the reliability of test results. Furthermore, improper operation may cause a sudden drop in internal pressure, disrupting the positive pressure state and increasing safety risks.

[0005] Therefore, there is an urgent need for a portable, fully automatic positive pressure protective clothing airtightness testing box that is easy to use and has high accuracy. Utility Model Content

[0006] The purpose of this invention is to provide a portable, fully automatic positive pressure protective clothing airtightness testing box to solve the problems existing in the prior art. By setting up input and output pipelines to be responsible for inputting and outputting gas into the test piece respectively, and setting a pressure switch in the output pipeline, the convenience of pressure adjustment is improved while ensuring the accuracy of pressure adjustment.

[0007] To achieve the above objectives, this utility model provides the following solution: This utility model provides a portable, fully automatic positive pressure protective clothing airtightness testing box, comprising: An input pipeline, wherein the inlet end of the input pipeline is used to connect to the outlet of the air source, and the outlet end of the input pipeline is used to connect to the inlet of the test piece; An output pipe, wherein the air inlet of the output pipe is used to connect to the air outlet of the tested component; The pressure switch includes an inlet end connected to the outlet end of the output pipe, and the outlet end of the pressure switch is connected to the atmospheric environment.

[0008] As one implementation, a micro-flow regulating valve is provided on the input pipeline.

[0009] As one embodiment, it also includes a housing and a cover. One end of the cover is hinged to the housing, and the other end of the cover is detachably connected to the housing. A first mounting plate is provided in the housing. The input pipeline and the output pipeline are arranged in a first accommodating space between the first mounting plate and the housing. A first connector and a second connector are mounted on the first mounting plate. The air inlet end of the first connector is connected to the air outlet end of the input pipeline. The air outlet end of the first connector is used to connect to the air inlet of the tested component. The air inlet end of the second connector is connected to the air outlet of the tested component. The air outlet end of the second connector is connected to the air inlet end of the output pipeline.

[0010] As one embodiment, the first mounting plate is further provided with a third connector, the air inlet of the third connector being used to connect to the air source, and the air outlet of the third connector being used to connect to the air inlet of the first connector.

[0011] As one embodiment, a control valve is provided between the first connector and the third connector.

[0012] As one embodiment, a pressure sensor is also included, which is connected to the pressure switch.

[0013] In one embodiment, the first connector, the second connector, and the third connector are all detachably connected to the first mounting plate.

[0014] In one embodiment, a second mounting plate is provided on the box cover, and a mounting hole is provided on the second mounting plate. A touch screen is installed in the mounting hole and is connected to the pressure switch. A first connection hole is provided on the first mounting plate and a second connection hole is provided on the second mounting plate. The wire between the pressure switch and the touch screen passes through the first connection hole and the second connection hole.

[0015] As one embodiment, the system also includes a controller and a printer, the printer being mounted on the lid, and both the pressure sensor and the printer being connected to the controller.

[0016] As one embodiment, the lid is detachably connected to the box body via a latch.

[0017] The present invention achieves the following technical advantages over the prior art: The portable fully automatic positive pressure protective clothing airtightness testing chamber disclosed in this utility model can input gas into the test piece through the input pipeline to generate the pressure required for testing. A pressure switch is installed on the output pipeline. Once the pressure inside the test piece exceeds the set value of the pressure switch, the pressure switch will automatically open, releasing the gas in the test piece through the output pipeline to complete the pressure relief. This ensures the accuracy of the test pressure inside the test piece. Moreover, the input and output pipelines are independent of each other and do not interfere with each other. Therefore, when the output pipeline releases the gas in the test piece, there is no need to separately adjust the on / off state of the input pipeline, which improves the convenience of pressure adjustment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the portable fully automatic positive pressure protective clothing airtightness testing box in an embodiment of this utility model; Figure 2 This is a schematic diagram showing the connection between the portable fully automatic positive pressure protective clothing airtightness testing box and the tested item in an embodiment of this utility model; Figure 3 This is a schematic diagram of the box body in an embodiment of the present utility model; Figure 4 for Figure 3 A diagram from another perspective.

[0020] The components are as follows: 1. Input pipeline; 2. Item under test; 3. Output pipeline; 4. Pressure switch; 5. Micro-flow regulating valve; 6. Housing; 7. Cover; 8. First mounting plate; 9. First connector; 10. Second connector; 11. Third connector; 12. Pressure sensor; 13. Touch screen; 14. Second mounting plate; 15. First connection hole; 16. Second connection hole; 17. Controller; 18. Printer; 19. Power cord placement slot; 20. Connecting pipe placement slot; 21. Control valve; 22. Temperature sensor. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] The purpose of this invention is to provide a portable, fully automatic positive pressure protective clothing airtightness testing box to solve the problems existing in the prior art. By setting up input and output pipelines and installing a pressure switch on the output pipeline, the technical effect of improving the convenience and accuracy of pressure regulation is achieved.

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Please refer to Figure 1 - Figure 4 This embodiment provides a portable fully automatic positive pressure protective clothing airtightness testing box, including: an input pipe 1, an output pipe 3, and a pressure switch 4; wherein, the air inlet of the input pipe 1 is used to connect to the air outlet of an air source, the air outlet of the input pipe 1 is used to connect to the air inlet of the tested component 2, the air inlet of the output pipe 3 is used to connect to the air outlet of the tested component 2, the air inlet of the pressure switch 4 is connected to the air outlet of the output pipe 3, and the air outlet of the pressure switch 4 is connected to the atmospheric environment. Its working principle is as follows: Gas supplied by the gas source enters the tested component 2 through the input pipe 1 and reaches the pressure switch 4. When the gas source is first connected to the tested component 2, the gas pressure in the tested component 2 is less than the preset pressure of the pressure switch 4, and the pressure switch 4 is in the closed state. As gas from the gas source continuously enters the tested component 2, the gas pressure in the tested component 2 gradually increases. Once the pressure value in the tested component 2 exceeds the preset pressure value of the pressure switch 4, the preset switch will automatically open and release a certain amount of gas to maintain the pressure in the tested component 2 at the preset pressure. At this time, the gas source can be shut off to perform pressure holding treatment on the tested component 2. In this process, the gas release is automatically completed by the pressure switch 4, which has higher accuracy compared to the pressure relief method of manually controlling the exhaust speed and exhaust state. Furthermore, by setting the input pipe 1 and the output pipe 3 to be independent of each other, the pressure relief process is not affected by the gas source and the input pipe 1. Compared to the setting method of controlling both pressure increase and pressure relief through the same pipe, it has greater convenience.

[0025] As one embodiment, the preset pressure value of pressure switch 4 is adjustable, enabling the device to meet pressure conditions at different stages during a test process. For example, the initial stable pressure is 1.29 kPa, maintained for 1 minute, and then automatically depressurized to 1.02 kPa. It is understood that the specific preset value of pressure switch 4 can be adaptively adjusted according to actual needs, and is not limited to the two specific values ​​mentioned above.

[0026] Furthermore, the preset pressure of pressure switch 4 can be automatically adjusted by the control system. For example, it can be set to one pressure value at the beginning and then automatically reduced to another pressure value after holding the pressure for a certain period of time. This achieves precise pressure adjustment and control, and allows for repeated airtightness measurements without human intervention, resulting in higher testing efficiency and more stable and accurate results.

[0027] As an example, the tested item 2 is a positive pressure garment.

[0028] As an example, a micro-flow regulating valve 5 is provided on the input pipeline 1. By using a high-precision micro-flow regulating valve 5 to regulate the intake air flow, the air path can be stabilized.

[0029] As one embodiment, the portable fully automatic positive pressure protective clothing airtightness testing box also includes a box body 6 and a box cover 7. One end of the box cover 7 is hinged to the box body 6, and the other end of the box cover 7 is detachably connected to the box body 6. The input pipeline 1, the output pipeline 3, and the pressure switch 4 are all located in the space between the box body 6 and the box cover 7. When in use, one end of the box cover 7 is opened, and the test operation can be performed by rotating the box cover 7. When not testing, all components are retracted into the box body 6 and the box cover 7 to facilitate the handling and carrying of the device, thereby improving the convenience of using the device.

[0030] In one embodiment, a first mounting plate 8 is provided in the housing 6. The input pipe 1 and the output pipe 3 are arranged in a first accommodating space between the first mounting plate 8 and the housing 6. A first connector 9 and a second connector 10 are installed on the first mounting plate 8. The air inlet end of the first connector 9 is connected to the air outlet end of the input pipe 1, and the air outlet end of the first connector 9 is used to connect to the air inlet of the test piece 2. The air inlet end of the second connector 10 is connected to the air outlet of the test piece 2, and the air outlet end of the second connector 10 is connected to the air inlet end of the output pipe 3. The input pipe 1 and the output pipe 3 are contained within the first accommodating space, which avoids the air path from affecting the operation process and prevents the air path from leaking due to accidental contact or pulling by the operator, thus ensuring the stable operation of the testing process.

[0031] As an example, the first mounting plate 8 is also provided with a third connector 11, the air inlet end of the third connector 11 is used to connect to an air source, and the air outlet end of the third connector 11 is used to connect to the air inlet end of the first connector 9.

[0032] As an example, the first connector 9 and the second connector 10 both adopt CPC quick-connect connectors, and the third connector 11 adopts a stainless steel quick-connect connector, which ensures the speed of connecting the portable fully automatic positive pressure protective clothing airtightness testing box with the tested item 2 and the air source.

[0033] As one embodiment, a control valve 21 is provided between the first connector 9 and the third connector 11. The on / off state of the input pipeline 1 can be changed by the control valve 21 without shutting off the gas source.

[0034] Preferably, the control valve 21 is a three-position five-way dual-control solenoid valve to control the opening and closing of the gas path, and can realize the emergency gas release function in emergency situations.

[0035] As an example, the portable fully automatic positive pressure protective clothing airtightness testing box also includes a pressure sensor 12, which is connected to a pressure switch 4. The pressure sensor 12 can detect the pressure inside the tested component 2 in real time.

[0036] As one embodiment, the pressure sensor 12 is a digital display pressure sensor 12.

[0037] As one embodiment, a second mounting plate 14 is provided on the cover 7. The second mounting plate 14 has mounting holes, in which a touch screen 13 is installed. The touch screen 13 is connected to the pressure sensor 12 and the pressure switch 4 respectively. A first connecting hole 15 is provided on the first mounting plate 8, and a second connecting hole 16 is provided on the second mounting plate 14. The wires between the pressure sensor 12 and the touch screen 13, and the wires between the pressure switch 4 and the touch screen 13, all pass through the first connecting hole 15 and the second connecting hole 16. The preset value of the pressure switch 4 can be adjusted through the touch screen 13.

[0038] Preferably, there is a second receiving space between the second mounting plate 14 and the cover 7 for accommodating wires and other necessary components.

[0039] As one embodiment, the portable fully automatic positive pressure protective clothing airtightness testing box also includes a controller 17 and a printer 18. The printer 18 is installed on the box cover 7. Both the pressure sensor 12 and the printer 18 are connected to the controller 17. The controller 17 can acquire the data of the pressure sensor 12 in real time. If the pressure value detected by the pressure sensor 12 is less than the standard value after a certain period of pressure holding, it indicates that the sealing performance of the tested part 2 is not up to standard. The controller 17 then determines that the tested part 2 does not meet the design requirements and can control the printer 18 to work, printing out the data detected by the pressure sensor 12 and the conclusion of non-compliance in paper form. If the pressure value detected by the pressure sensor 12 is greater than the standard value, the controller 17 determines that the tested part 2 meets the design requirements and prints out the conclusion and intermediate data.

[0040] Furthermore, the touch screen 13 is connected to the controller 17. The touch screen 13 can adjust the preset value of the pressure switch 4 through the controller 17, and can also adjust other parameters during the test process through the touch screen 13 and the controller 17.

[0041] As one embodiment, the controller 17 is installed in the first receiving space, and the wire connecting the controller 17 and the printer 18 passes through the first connection hole 15 and the second connection hole 16, and is connected from the first receiving space to the second receiving space.

[0042] Preferably, the controller 17 has a built-in timer.

[0043] As one embodiment, a protective sleeve is provided between the first connecting hole 15 and the second connecting hole 16 to protect the passing wires.

[0044] As one embodiment, the lid 7 is detachably connected to the box body 6 via a latch.

[0045] As one embodiment, the control valve 21 is a three-position five-way dual-control solenoid valve, which can realize the emergency venting function in emergency situations.

[0046] As one embodiment, the pressure sensor 12, the output line 3, and the pressure switch 4 are connected via a three-way valve.

[0047] As an example, the first connector 9, the second connector 10 and the third connector 11 are all detachably connected to the first mounting plate 8 for easy replacement and maintenance. This detachable connection method can avoid reducing the reserved space between the box 6 and the box cover 7, thus compressing the overall volume of the device. In addition, different models and sizes of plugs can be replaced according to actual needs.

[0048] As one embodiment, the housing 6 is provided with an aluminum alloy handle to facilitate carrying the device.

[0049] As one example, the gas in the gas source is air.

[0050] As an example, the gas source pressure is no greater than 1.0 MPa.

[0051] As one embodiment, the pressure sensor 12 has a range of 3000 Pa, an accuracy of 1 Pa, and a resolution of 0.1 Pa; it has a fast response and can be used to adjust and stabilize the air circuit pressure.

[0052] As one embodiment, the pressure of the pressure switch 4 is adjustable from 100 to 3000 Pa, monitors the pressure changes in the gas circuit, and provides feedback and protects the gas circuit when the pressure exceeds the safety value.

[0053] As one embodiment, the micro-flow regulating valve 5 is a knob-type regulator with a working pressure of 1.6 MPa.

[0054] As an example, the controller 17 can calculate the difference between the pressure before and after the pressure holding is completed through a preset program. If the difference is greater than 20% of the test pressure, the airtightness test is deemed unqualified.

[0055] As an example, a temperature sensor 22 is installed inside the housing 6. Since the ambient temperature has a significant impact on the airtightness test, the temperature sensor 22 can monitor the changes in ambient temperature at any time and calculate the impact of temperature changes on pressure based on existing technology, so as to eliminate the influence of temperature on the accuracy of the airtightness test results.

[0056] Preferably, the temperature sensor 22 is a surface-mount temperature transmitter.

[0057] As one embodiment, the airtightness testing box has an independent power interface with a protection device, which can be connected to ordinary mains power or power bank. The power cord uses an aviation plug for plug-and-play connection.

[0058] As one embodiment, the airtightness testing box has RS485 communication function, which can communicate with other devices for data and facilitate expansion.

[0059] As one embodiment, the controller 17 has a USB interface to facilitate the download of test data.

[0060] As one embodiment, the housing 6 is also provided with a power cord placement slot 19 and a connecting pipe placement slot 20.

[0061] Preferably, both the power cord placement slot 19 and the connecting pipe placement slot 20 are provided with sponge pads.

[0062] As an example, the portable fully automatic positive pressure protective clothing airtightness testing box is equipped with a power switch.

[0063] As an example, the power cord is designed to be detachable, and a power cord socket is provided at the back of the portable fully automatic positive pressure protective clothing airtightness testing box.

[0064] As an example, the controller 17 can automatically adjust the on / off state of the micro-flow regulating valve 5 and the control valve 21. At the same time, it can also adjust the preset value of the pressure switch 4. Thus, after the device is connected to the air source and the positive pressure suit, the sealing test process can be automatically completed, realizing the automation of the sealing test process.

[0065] As an example, the portable fully automatic positive pressure protective clothing airtightness testing box can perform the ultimate pressure test of the positive pressure clothing. First, pressure is continuously applied to the positive pressure clothing through an air source. During this process, the pressure sensor 12 can record the pressure change inside the positive pressure clothing in real time. When the positive pressure clothing is destroyed by the internal pressure, the internal pressure will be released instantly. The maximum pressure value of the pressure sensor 12 during this process is recorded. The pressure at this time is the maximum ultimate breaking pressure of the positive pressure clothing. The above method can be used to verify the process of the main material, welding process, and component connection strength. Furthermore, the ultimate breaking pressure of the positive pressure suit is input via the touch screen 13, and the preset value of the pressure switch 4 is set. The preset value of the pressure switch 4 is not greater than the ultimate breaking pressure of the positive pressure suit. Gas from the gas source flows through the control valve 21 into the positive pressure suit. The other end of the positive pressure suit is connected to the pressure sensor 12. The pressure value of the pressure sensor 12 is transmitted to the controller 17 in the form of a digital signal. When the pressure sensor 12 detects that the pressure value in the positive pressure suit has reached the ultimate pressure, the control valve 21 is closed, and pressure holding or other operations can be performed according to actual needs. If the pressure inside the positive pressure suit suddenly exceeds the ultimate pressure, the controller 17 closes the control valve 21, and the pressure switch 4 automatically opens to release pressure to ensure the safety of the test pipeline and the positive pressure suit.

[0066] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A portable, fully automatic positive pressure protective clothing airtightness testing box, characterized in that, include: The input pipe (1) has an inlet end for connecting to the outlet of the air source and an outlet end for connecting to the inlet of the test piece (2). Output pipe (3), the air inlet of the output pipe (3) is used to connect to the air outlet of the tested object (2); And a pressure switch (4), the air inlet of the pressure switch (4) is connected to the air outlet of the output pipe (3), and the air outlet of the pressure switch (4) is connected to the atmospheric environment.

2. The portable fully automatic positive pressure protective clothing airtightness testing box according to claim 1, characterized in that, A micro-flow regulating valve (5) is installed on the input pipeline (1).

3. The portable fully automatic positive pressure protective clothing airtightness testing box according to claim 1, characterized in that, It also includes a housing (6) and a cover (7). One end of the cover (7) is hinged to the housing (6), and the other end of the cover (7) is detachably connected to the housing (6). A first mounting plate (8) is provided in the housing (6). The input pipe (1) and the output pipe (3) are arranged in a first accommodating space between the first mounting plate (8) and the housing (6). A first connector (9) and a second connector (10) are installed on the first mounting plate (8). The air inlet of the first connector (9) is connected to the air outlet of the input pipe (1). The air outlet of the first connector (9) is used to connect to the air inlet of the tested item (2). The air inlet of the second connector (10) is connected to the air outlet of the tested item (2). The air outlet of the second connector (10) is connected to the air inlet of the output pipe (3).

4. The portable fully automatic positive pressure protective clothing airtightness testing box according to claim 3, characterized in that, The first mounting plate (8) is also provided with a third connector (11), the air inlet end of the third connector (11) is used to connect with the air source, and the air outlet end of the third connector (11) is used to connect with the air inlet end of the first connector (9).

5. The portable fully automatic positive pressure protective clothing airtightness testing box according to claim 4, characterized in that, A control valve (21) is provided between the first connector (9) and the third connector (11).

6. The portable fully automatic positive pressure protective clothing airtightness testing box according to claim 5, characterized in that, It also includes a pressure sensor (12), which is connected to the pressure switch (4).

7. The portable fully automatic positive pressure protective clothing airtightness testing box according to claim 5, characterized in that, The first connector (9), the second connector (10) and the third connector (11) are all detachably connected to the first mounting plate (8).

8. The portable fully automatic positive pressure protective clothing airtightness testing box according to claim 7, characterized in that, The box cover is provided with a second mounting plate (14), and the second mounting plate (14) has a mounting hole. A touch screen (13) is installed in the mounting hole. The touch screen (13) is connected to the pressure switch (4). The first mounting plate (8) has a first connection hole (15), and the second mounting plate (14) has a second connection hole (16). The wire between the pressure switch (4) and the touch screen (13) passes through the first connection hole (15) and the second connection hole (16).

9. The portable fully automatic positive pressure protective clothing airtightness testing box according to claim 6, characterized in that, It also includes a controller (17) and a printer (18), the printer (18) being mounted on the cover (7), and both the pressure sensor (12) and the printer (18) being connected to the controller (17).

10. The portable fully automatic positive pressure protective clothing airtightness testing box according to claim 3, characterized in that, The lid (7) is detachably connected to the box body (6) by a latch.

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