Closed protective clothing sealing performance positioning detection device and detection method thereof

Abstract

The invention belongs to the technical field of protective clothing sealing performance detection, and particularly relates to a sealed protective clothing sealing performance positioning detection device and a detection method thereof. The positioning detection device comprises an operation table, a probe support and a protective clothing fixing support, the probe support and the protective clothing fixing support are mounted on the operation table, the positioning detection device further comprises a tracer gas circulation system, the protective clothing fixing support is used for fixing the closed protective clothing to be detected, and the tracer gas circulation system is used for inflating the protective clothing; a lifting mechanism and a positioning detection probe are installed on the probe support, and the lifting mechanism is used for driving the positioning detection probe to ascend or descend so that the sealing performance of the protective clothing at different height positions can be detected through the positioning detection probe. The lifting mechanism is used for driving the positioning detection probe to ascend or descend, the sealing performance of the protective clothing at different height positions is detected through the positioning detection probe, and positioning detection is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of sealing detection of protective clothing, and in particular relates to a sealing positioning detection device for closed protective clothing and a detection method thereof. Background Art

[0002] Closed protective clothing is protective clothing worn by professionals when they enter specific places to work. It uses airtight clothing materials and a sealed structure design to wrap people inside the protective clothing and completely isolate them from the outside environment. For example: when firefighters enter the scene of a fire or accident involving chemical agents, hazardous chemicals, and corrosive materials; when medical personnel enter a virus-infected area; when astronauts enter space, they all need to wear closed protective clothing to ensure the safety of the staff. Therefore, the airtightness test of closed protective clothing is particularly important. Existing tests on protective clothing are generally manual tests or inflation pressure tests. Manual tests are difficult to detect minor damage to protective clothing, inflation pressure tests are time-consuming, and can only detect leaks as a whole, and cannot detect leaks by positioning. Summary of the invention

[0003] Based on the above-mentioned shortcomings and deficiencies in the prior art, one of the objects of the present invention is to at least solve one or more of the above-mentioned problems in the prior art. In other words, one of the objects of the present invention is to provide a closed protective clothing sealing positioning detection device and a detection method thereof that meet one or more of the above-mentioned needs.

[0004] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0005] A closed protective clothing sealing positioning detection device comprises an operating table and a probe bracket and a protective clothing fixing bracket installed on the operating table, and also comprises a tracer gas circulation system. The protective clothing fixing bracket is used to fix the closed protective clothing to be tested, and the tracer gas circulation system is used to inflate the protective clothing. A lifting mechanism and a positioning detection probe are installed on the probe bracket. The lifting mechanism is used to drive the positioning detection probe to rise or fall, so as to detect the sealing of the protective clothing at different heights through the positioning detection probe.

[0006] As a preferred solution, the operating table is provided with a tracer gas charging port and a tracer gas recovery port, which are respectively connected to the air inlet valve and the exhaust valve of the protective clothing, and the tracer gas charging port and the tracer gas recovery port are respectively connected to the tracer gas circulation system.

[0007] As a preferred solution, the tracer gas circulation system includes a tracer gas storage tank and a hydrogen supplement bottle and a nitrogen supplement bottle for replenishing gas in the tracer gas storage tank. The tracer gas storage tank has an air inlet and an air outlet. An air pump is installed at the air outlet of the tracer gas storage tank. The outlet of the air pump is connected to the tracer gas charging port on the operating table. The tracer gas charging port is used to inflate the protective clothing.

[0008] A vacuum pump is installed at the air outlet of the tracer gas recovery port on the operating table. The air outlet of the vacuum pump is connected to a three-way solenoid valve. One way of the three-way solenoid valve is used to pre-vacuum the protective clothing, and the other way is connected to the air inlet of the tracer gas storage tank.

[0009] As a preferred solution, a hydrogen sensor is provided in the tracer gas storage tank for real-time detection of the hydrogen concentration in the tracer gas storage tank;

[0010] When the hydrogen concentration in the tracer gas storage tank is less than 5%, the valve on the hydrogen replenishment bottle automatically opens to replenish hydrogen into the tracer gas storage tank until the hydrogen concentration reaches 5%;

[0011] When the hydrogen concentration in the tracer gas storage tank is greater than 5%, the valve on the nitrogen replenishment bottle automatically opens to replenish nitrogen into the tracer gas storage tank until the hydrogen concentration reaches 5%.

[0012] As a preferred solution, a filter is provided at the air inlet of the tracer gas storage tank.

[0013] As a preferred solution, the process for pre-vacuuming the protective clothing is provided with an exhaust gas treatment device.

[0014] As a preferred solution, the positioning detection probe includes an annular frame and 6 to 20 leak detection sensor units arranged inside the annular frame and distributed in an array along the circumference thereof, and the leak detection sensor units are used to detect hydrogen concentration.

[0015] As a preferred embodiment, the leak detection sensing unit includes a telescopic mechanism, an exhaust pipe, a distance measuring sensor, a hydrogen measuring sensor and an audible and visual alarm. The telescopic mechanism is arranged on the annular frame, and is used to drive the exhaust pipe to move and cooperate with the annular frame to adjust the distance between the exhaust port of the exhaust pipe and the protective clothing; the distance measuring sensor is arranged on the exhaust pipe, and is used to detect the distance between the exhaust port of the exhaust pipe and the protective clothing; the hydrogen measuring sensor is arranged in the exhaust pipe, and is used to detect the hydrogen concentration in the gas drawn into the exhaust pipe; the audible and visual alarm is arranged on the exhaust pipe and is located outside the annular frame, and is connected to the hydrogen measuring sensor signal.

[0016] As a preferred solution, the distance between the exhaust port of the exhaust pipe and the protective clothing is 5 to 10 mm.

[0017] As a preferred solution, a roller with a brake is provided at the bottom of the operating table.

[0018] The present invention also provides a detection method of the positioning detection device as described in the above scheme, comprising the following steps:

[0019] (1) Connect the air inlet valve and exhaust valve of the closed protective suit to be tested to the tracer gas charging port and tracer gas recovery port on the operating table respectively, and fix the closed protective suit to be tested vertically on the protective suit fixing bracket;

[0020] (2) Start the vacuum pump and the three-way solenoid valve to pre-evacuate the protective suit. After the pre-evacuation is completed, turn off the vacuum pump and the three-way solenoid valve, open the valve of the tracer gas charging port, and fill the protective suit with a nitrogen-hydrogen mixed tracer gas with a hydrogen concentration of 5%;

[0021] (3) After the tracer gas is filled, the valve of the tracer gas filling port is closed, the leak detection sensor unit and the lifting mechanism are started, and the positioning detection probe performs a scanning motion from top to bottom under the action of the lifting mechanism;

[0022] When the hydrogen sensor detects that the hydrogen concentration exceeds the preset alarm concentration, that is, there is a leak in the protective clothing, the positioning detection probe stops moving and the corresponding sound and light alarm is triggered;

[0023] (4) After the test is completed, the vacuum pump is started to recover the gas in the protective suit to the tracer gas storage tank. After the recovery is completed, the hydrogen concentration in the gas storage tank is tested to see if it reaches 5%, and the gas concentration is adjusted in real time.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) The present invention uses a lifting mechanism to drive the positioning detection probe to rise or fall, so as to detect the sealing of the protective clothing at different heights through the positioning detection probe, thereby realizing positioning detection;

[0026] (2) The positioning detection probe of the present invention adopts an annular structure, and a plurality of leak detection sensor units are arranged in an array on the annular structure. The exhaust pipe of each leak detection sensor unit is retractable, and automatically retracts and retracts according to the distance between the exhaust pipe and the protective clothing detected by the distance measuring sensor, so that the exhaust pipe is always close to the inflatable protective clothing without touching it, and the tracer gas hydrogen concentration on the surface of the protective clothing is quickly and accurately measured. When the hydrogen measurement sensor measures that the hydrogen concentration on the surface of the protective clothing exceeds the preset alarm concentration, the corresponding sound and light alarm is triggered to alarm, warning that the place is a leak point, thereby realizing rapid positioning of the leak point;

[0027] (3) The tracer gas circulation system of the present invention can reuse the tracer gas, effectively saving resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 1 is a schematic structural diagram of a closed protective clothing sealing positioning detection device according to Embodiment 1 of the present invention;

[0029] Figure 2 Schematic diagram of gas circuit connection of the tracer gas circulation system of Example 1 of the present invention;

[0030] Figure 3 It is a schematic diagram of the internal structure of the leak detection sensor unit of Example 1 of the present invention. DETAILED DESCRIPTION

[0031] In order to more clearly illustrate the embodiments of the present invention, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other accompanying drawings and other implementation methods can be obtained based on these accompanying drawings without creative work.

[0032] Embodiment 1:

[0033] like Figure 1 As shown, the closed protective clothing sealing positioning detection device of this embodiment includes an operating table 1, a tracer gas circulation system, a positioning detection probe 3, a probe bracket 4 and a central controller 5. The tracer gas circulation system and the central controller 5 are installed in a cabinet below the operating table 1, and the probe bracket 4 is fixedly installed on the right side of the operating table 1; the positioning detection probe 3 is fixedly installed on the probe bracket 4, and the probe bracket 4 is provided with a lifting cylinder 6. The positioning detection probe 3 performs an up and down scanning motion along the protective clothing under the action of the lifting cylinder 6, and the positioning detection probe 3, the lifting cylinder 6, and the tracer gas circulation system are respectively communicated with the central controller 5.

[0034] Among them, a protective clothing support seat 71 and a protective clothing fixing bracket 72 are installed above the operating table 1. The protective clothing support seat 71 is slightly higher than the table top of the operating table 1. The operating table 1 in front of the protective clothing support seat 71 is provided with a tracer gas inflation port 8 and a tracer gas recovery port 9. The LCD control screen 10 of the central controller 5 is installed on the operating table 1 on the right side of the protective clothing support seat 71. A roller 23 with a brake is installed at the bottom of the operating table 1 for easy transportation. In addition, the protective clothing fixing bracket 72 is installed on the top of the probe bracket 4. The protective clothing is hoisted and fixed by using the protective clothing fixing bracket 72. The bottom of the protective clothing is supported on the protective clothing support seat 71 to achieve the fixation of the inflated protective clothing.

[0035] The tracer gas circulation system 2 of this embodiment is installed in a cabinet below the operating table 1. Figure 2As shown, the tracer gas circulation system 2 includes a tracer gas storage tank 24, a hydrogen supplement bottle 17 and a nitrogen supplement bottle 18. Specifically, the top of the tracer gas storage tank 24 is provided with a storage tank air inlet 15 and a storage tank air outlet 25, and an air pump 11 is installed at the storage tank air outlet 25, and the outlet of the air pump 11 is connected to the tracer gas charging port 8 on the operating table 1; a vacuum pump 12 is installed at the outlet end of the tracer gas recovery port 9 on the operating table 1, and the outlet end of the vacuum pump 12 is connected to a three-way solenoid valve 13, one of the three-way solenoid valves 13 is used for pre-vacuuming the protective clothing, and an exhaust gas treatment device 14 is installed at the end of the pipeline; the other way is connected to the air inlet 15 of the tracer gas storage tank, and a filter 16 is arranged at the air inlet 15 of the gas storage tank. In addition, a hydrogen replenishing bottle 17 and a nitrogen replenishing bottle 18 are provided on the side of the tracer gas storage tank 24. A hydrogen sensor is installed on the inner top of the tracer gas storage tank 24 for real-time monitoring of the hydrogen concentration in the storage tank. When the hydrogen concentration in the storage tank 24 is less than 5%, the valve on the hydrogen replenishing bottle 17 automatically opens to replenish hydrogen into the storage tank 24 until the hydrogen concentration reaches 5%; when the hydrogen concentration in the storage tank 24 is greater than 5%, the valve on the nitrogen replenishing bottle 18 automatically opens to replenish nitrogen into the storage tank 24 until the hydrogen concentration reaches 5%.

[0036] The positioning detection probe 3 of this embodiment adopts an annular structure, including an annular frame and 6 to 20 leak detection sensor units arranged inside the annular frame and distributed in an array along the circumference thereof, and the leak detection sensor units are used to detect the hydrogen concentration. Specifically, Figure 3 As shown, the leak detection sensing unit of this embodiment includes a telescopic cylinder, an exhaust pipe 20, a distance sensor 19, a hydrogen sensor 21 and an audible and visual alarm 22. The distance sensor 19 is fixedly mounted at the top of the exhaust pipe 20, corresponding to the exhaust port of the exhaust pipe 20; the hydrogen sensor 21 is mounted inside the exhaust pipe 20, and the audible and visual alarm 22 is mounted at the rear end of the hydrogen sensor 21 and outside the annular frame. The exhaust pipe 20 automatically retracts and retracts according to the distance from the exhaust pipe 20 to the protective suit detected by the distance sensor 19, so that the top of the exhaust pipe always maintains a distance of 5 to 10 mm from the protective suit; when the hydrogen sensor 21 detects that the hydrogen concentration on the surface of the protective suit is higher than the preset alarm concentration, that is, there is a leak in the protective suit, the corresponding audible and visual alarm 22 triggers an alarm.

[0037] The detection method of the closed protective clothing sealing positioning detection device of this embodiment is as follows: the air inlet valve and the exhaust valve of the protective clothing are respectively connected to the tracer gas charging port 8 and the tracer gas recovery port 9 on the operating table 1, and the protective clothing is vertically fixed on the protective clothing fixing bracket 72; the central controller 5 controls the vacuum pump 12 and the three-way solenoid valve 13 to pre-vacuum the protective clothing; after the pre-vacuum is completed, the central controller 5 controls to close the vacuum pump 12 and the three-way solenoid valve 13, and the valve of the tracer gas charging port 8 is opened to fill the protective clothing with a nitrogen-hydrogen mixture with a hydrogen concentration of 5%. Tracer gas; after completing the tracer gas filling, the central controller 5 controls to close the valve of the tracer gas filling port 8, starts the leak detection sensor unit and the lifting cylinder 6, and the positioning detection probe 3 slowly scans from top to bottom under the action of the lifting cylinder 6. When the hydrogen detection sensor detects that there is a leak in the protective clothing, the positioning detection probe 3 stops moving and triggers the corresponding sound and light alarm 22 to alarm; after the detection is completed, the vacuum pump is started to recover the gas in the protective clothing to the tracer gas storage tank. After the recovery is completed, it is detected whether the hydrogen concentration in the storage tank reaches 5%, and the gas concentration is adjusted in real time.

[0038] The above description is only a detailed description of the preferred embodiments and principles of the present invention. For ordinary technicians in this field, according to the ideas provided by the present invention, there will be changes in the specific implementation methods, and these changes should also be regarded as the protection scope of the present invention.

Claims

1. A closed protective clothing sealing positioning detection device, characterized in that: It includes an operating table and a probe bracket and a protective clothing fixing bracket installed on the operating table, as well as a tracer gas circulation system. The protective clothing fixing bracket is used to fix the closed protective clothing to be tested, and the tracer gas circulation system is used to inflate the protective clothing. A lifting mechanism and a positioning detection probe are installed on the probe bracket. The lifting mechanism is used to drive the positioning detection probe to rise or fall, so as to detect the sealing of the protective clothing at different heights through the positioning detection probe.

2. The positioning detection device according to claim 1, characterized in that: The operating table is provided with a tracer gas charging port and a tracer gas recovery port, which are respectively connected to the air inlet valve and the exhaust valve of the protective clothing. The tracer gas charging port and the tracer gas recovery port are respectively connected to the tracer gas circulation system.

3. The positioning detection device according to claim 2, characterized in that: The tracer gas circulation system comprises a tracer gas storage tank and a hydrogen supplement bottle and a nitrogen supplement bottle for supplementing gas to the tracer gas storage tank. The tracer gas storage tank has an air inlet and an air outlet. An air pump is installed at the air outlet of the tracer gas storage tank. The outlet of the air pump is connected to the tracer gas charging port on the operating table. The tracer gas charging port is used to inflate the protective clothing. A vacuum pump is installed at the air outlet of the tracer gas recovery port on the operating table. The air outlet of the vacuum pump is connected to a three-way solenoid valve. One way of the three-way solenoid valve is used to pre-vacuum the protective clothing, and the other way is connected to the air inlet of the tracer gas storage tank.

4. The positioning detection device according to claim 3, characterized in that: A hydrogen sensor is provided in the tracer gas storage tank for real-time detection of the hydrogen concentration in the tracer gas storage tank; When the hydrogen concentration in the tracer gas storage tank is less than 5%, the valve on the hydrogen replenishment bottle automatically opens to replenish hydrogen into the tracer gas storage tank until the hydrogen concentration reaches 5%; When the hydrogen concentration in the tracer gas storage tank is greater than 5%, the valve on the nitrogen replenishment bottle automatically opens to replenish nitrogen into the tracer gas storage tank until the hydrogen concentration reaches 5%.

5. The positioning detection device according to claim 3, characterized in that: A filter is provided at the air inlet of the tracer gas storage tank.

6. The positioning detection device according to claim 3, characterized in that: The process of pre-vacuuming the protective clothing is provided with an exhaust gas treatment device.

7. The positioning detection device according to any one of claims 3 to 6, characterized in that: The positioning detection probe comprises an annular frame and 6 to 20 leak detection sensor units arranged inside the annular frame and distributed in an array along the circumference thereof. The leak detection sensor units are used to detect hydrogen concentration.

8. The positioning detection device according to claim 7, characterized in that: The leak detection sensing unit includes a telescopic mechanism, an exhaust pipe, a distance measuring sensor, a hydrogen measuring sensor and an audible and visual alarm. The telescopic mechanism is arranged on the annular frame, and is used to drive the exhaust pipe to move and cooperate with the annular frame to adjust the distance between the exhaust port of the exhaust pipe and the protective clothing; the distance measuring sensor is arranged on the exhaust pipe, and is used to detect the distance between the exhaust port of the exhaust pipe and the protective clothing; the hydrogen measuring sensor is arranged in the exhaust pipe, and is used to detect the hydrogen concentration in the gas drawn into the exhaust pipe; the audible and visual alarm is arranged on the exhaust pipe and is located outside the annular frame, and is connected to the hydrogen measuring sensor signal.

9. The positioning detection device according to claim 8, characterized in that: The distance between the air extraction port of the air extraction pipe and the protective clothing is 5 to 10 mm.

10. The detection method of the positioning detection device according to claim 8, characterized in that: The following steps are involved: (1) Connect the air inlet valve and exhaust valve of the closed protective suit to be tested to the tracer gas charging port and tracer gas recovery port on the operating table respectively, and fix the closed protective suit to be tested vertically on the protective suit fixing bracket; (2) Start the vacuum pump and the three-way solenoid valve to pre-evacuate the protective suit. After the pre-evacuation is completed, turn off the vacuum pump and the three-way solenoid valve, open the valve of the tracer gas charging port, and fill the protective suit with a nitrogen-hydrogen mixed tracer gas with a hydrogen concentration of 5%; (3) After the tracer gas is filled, the valve of the tracer gas filling port is closed, the leak detection sensor unit and the lifting mechanism are started, and the positioning detection probe performs a scanning motion from top to bottom under the action of the lifting mechanism; When the hydrogen sensor detects that the hydrogen concentration exceeds the preset alarm concentration, that is, there is a leak in the protective clothing, the positioning detection probe stops moving and the corresponding sound and light alarm is triggered; (4) After the test is completed, the vacuum pump is started to recover the gas in the protective suit to the tracer gas storage tank. After the recovery is completed, the hydrogen concentration in the gas storage tank is tested to see if it reaches 5%, and the gas concentration is adjusted in real time.

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