A compact air call tester

Abstract

The utility model discloses a compact air breathing tester relates to emergency rescue equipment technical field, can fast and convenient on -the -spot detection air breathing apparatus. The utility model discloses: box, test platform and head mould are placed in the storage space in the box, and the front of test platform is provided with test platform operation interface, and the side of test platform is provided with head mould inflation deflation interface, and head mould connecting wire is used for connecting the inflation deflation mouth of head mould and head mould inflation deflation interface, and head mould is used for installing the face guard of waiting to test, and face guard connecting wire is used for connecting the face guard of waiting to test and gas supply valve connecting joint. The compact air breathing tester, compact structure and strong portability provide the detection tool of being used as on -the -spot detection air breathing apparatus for first -line personnel, and the air tightness of the face guard on the detection head mould can discover potential problems such as face guard slight air leakage, gas supply valve pressure anomaly etc. in time.

Description

Technical Field

[0001] This utility model relates to the field of emergency rescue equipment technology, and in particular to a compact air breathing tester. Background Technology

[0002] In many fields involving hazardous gases or oxygen-deficient environments, such as industrial production, fire rescue, and mining, self-contained breathing apparatus (SCBA) is a critical piece of equipment for ensuring the safety of workers. The face mask within the SCBA is a key component; its negative pressure leakage rate directly affects the likelihood of hazardous gas intrusion in dangerous environments. Abnormal exhalation valve opening pressure can lead to obstructed exhalation, affecting worker exertion and breathing comfort. The air supply valve, as a core component of the SCBA's air supply system, can experience unstable air supply if its opening and balancing pressures are abnormal. Poor positive pressure anti-leakage performance can easily allow external contaminated gases to seep in, and excessive leakage when the valve is not open can severely shorten the effective lifespan of the respirator.

[0003] Whether workers can breathe smoothly and obtain a stable and reliable air supply in hazardous environments directly affects the success or failure of the mission and the safety of the personnel. Currently, the testing system for air respirators is divided into two levels: official professional testing and routine self-testing. Official testing agencies, with their high-precision, specialized large-scale equipment and strict standard procedures, issue authoritative and legal test results, which are an important basis for determining whether a respirator is qualified.

[0004] However, the testing process is complex and time-consuming, and the respirators cannot be used while being sent for testing, making it difficult to meet the needs of operators for immediate confirmation of equipment status before high-frequency operations. In contrast, the routine self-testing process has long lacked effective tools. Traditional routine testing methods are rudimentary and arbitrary, mostly relying on experience-based judgment, making it difficult to make accurate quantitative assessments of respirator performance.

[0005] Therefore, how to provide frontline personnel with a quick and convenient on-site testing tool to enable rapid initial screening of air respirators and timely detection of potential problems such as minor mask leaks or abnormal air supply valve pressure has become a direction that needs further research. Utility Model Content

[0006] The present invention provides a compact air respirator tester, which can quickly and conveniently test air respirators on site. The tester has a compact structure and is highly portable.

[0007] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions:

[0008] A compact breathing apparatus tester, characterized in that the main components of the compact breathing apparatus tester 1 include: a housing 1-1, a test platform 1-2, and a head mold 1-4, wherein the test platform 1-2 and the head mold 1-4 are placed in the storage space within the housing 1-1;

[0009] The front of the test stand 1-2 is equipped with a test stand operation interface 1-2-1, and the side of the test stand 1-2 is equipped with a head mold inflation and deflation port 1-2-2.

[0010] The head mold connecting line 1-6 is used to connect the inflation / deflation port of the head mold 1-4 and the head mold inflation / deflation interface 1-2-2;

[0011] Head molds 1-4 are used to mount the face mask to be tested;

[0012] The mask connection cable 1-5 is used to connect the mask to be tested and the air supply valve connection connector 1-2-1-10.

[0013] The box body (1-1) can be designed as a suitcase.

[0014] The compact breathing apparatus tester provided in this embodiment of the invention has a compact structure and is highly portable. It provides frontline personnel with a testing tool for on-site testing of breathing apparatus. By testing the airtightness of the mask on the head mold, potential problems such as slight air leakage from the mask or abnormal pressure of the air supply valve can be detected in a timely manner. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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.

[0016] Figure 1 Side view of the compact air breathing tester;

[0017] Figure 2 This is a schematic diagram of the test bench's operation interface;

[0018] Figure 3 This is a rear view of the test bench.

[0019] Figure 4-5 For application scenarios;

[0020] Figure 6 This is a schematic diagram of the principle of a compact air-breathing tester;

[0021] Figure 1 shows a compact breathing apparatus tester, a test bench, a test bench operation interface, a display interface, operation buttons on the display interface, a test countdown display interface, a current air pressure display interface, device status and power indicator lights, a test button group, an operation method description, a head mold inflation / deflation button group, a power button, an air supply valve connection connector, a solenoid valve group, an air pump, a circuit board group, a head mold inflation / deflation interface, an accessory storage space, a head mold, a mask connection cable, a head mold connection cable, and an air tank. 1-2-1-14, Gas tank 2 1-2-1-15, Gas tank 3 1-2-1-16, Air supply valve DV adapter 1-7, Mask adapter 1-8. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments of this utility model will be described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the word “comprising” as used in the specification of this utility model means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we say that an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connections or couplings. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the meaning consistent with their meaning in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless defined as herein.

[0023] This utility model embodiment provides a compact air breathing tester, such as Figure 1-6 As shown, the main components of the compact breathing apparatus 1 include: a housing 1-1, a test platform 1-2, and a head mold 1-4. The test platform 1-2 and the head mold 1-4 are placed in the storage space within the housing 1-1. The test platform 1-2 has a test platform operation interface 1-2-1 on its front and a head mold inflation / deflation interface 1-2-2 on its side. A head mold connecting cable 1-6 is used to connect the air inlet of the head mold 1-4, which is the inflation / deflation interface 1-2-2, allowing for reuse of inflation and deflation. The head mold 1-4 is used to mount the mask to be tested. A mask connecting cable 1-5 is used to connect the mask to be tested and the air supply valve connecting connector 1-2-1-10.

[0024] The test bench operation interface 1-2-1 includes a display interface 1-2-1-1, a test countdown display interface 1-2-1-3, and a current air pressure display interface 1-2-1-4. Below the display interface 1-2-1-1 are the display interface operation buttons 1-2-1-2, and below the current air pressure display interface 1-2-1-4 are the device status and device power indicator lights 1-2-1-5. The middle area of ​​the test bench operation interface 1-2-1 includes a test button group 1-2-1-6 and a power button 1-2-1-9, with the power button 1-2-1-9 used to power on or off the compact breathing apparatus 1. The lower area of ​​the test bench operation interface 1-2-1 includes a head mold inflation / deflation button group 1-2-1-8 and an air supply valve connection connector 1-2-1-10, and the remaining blank area is printed with operation instructions 1-2-1-7.

[0025] Specifically, the display interface 1-2-1-1, the test countdown display interface 1-2-1-3, and the current air pressure display interface 1-2-1-4 all use LCD screens; the operation buttons 1-2-1-2, the test button group 1-2-1-6, the power button 1-2-1-9, and the head mold inflation / deflation button group 1-2-1-8 all use mechanical buttons; the equipment status and equipment power indicator lights 1-2-1-5 use LED bulbs; all LCD screens, mechanical buttons, and LED bulbs are connected to the circuit board group 1-2-1-13 inside the test bench 1-2.

[0026] In this embodiment, as Figure 3 , 4As shown in Figure 6, the test bench 1-2 is equipped with gas storage tanks, such as gas storage tank 1 1-2-1-14, gas storage tank 2 1-2-1-15, and gas storage tank 3 1-2-1-16. The gas storage tanks are connected to the solenoid valve assembly 1-2-1-11 to release the gas in the gas storage tanks through the solenoid valve assembly 1-2-1-11; the air pump 1-2-1-12 is used to input the gas released from the gas storage tanks into the head mold inflation / deflation port 1-2-2 or the air supply valve connection connector 1-2-1-10.

[0027] Air pump 1-2-1-12 is also used to input outside air into test bench 1-2, with excess gas being sent to accumulators; each accumulator is also equipped with a safety valve. Specifically, the air pump is the gas source generating device for the entire system, producing compressed gas through its operation. This compressed gas is then delivered to various components in the system. The main function of the accumulator is to store gas. When the air pump delivers gas to the system, excess gas can be stored in the accumulator, which helps to provide a stable gas supply when the system's gas demand fluctuates, thus the accumulator plays a role in pressure stabilization.

[0028] The optional test stand 1-2 also has an accessory storage space 1-3 on its side, which is used to store the mask connection cable 1-5, the head mold connection cable 1-6, the air supply valve adapter 1-7 and the mask adapter 1-8.

[0029] The operation of the compact breathing apparatus in this embodiment is extremely simple. For example, pressing the medium-pressure seal button and the no-medium-pressure seal button in the test button group 1-2-1-6 opens solenoid valves 1 and 3, allowing the compact apparatus to supply air to the air supply valve. Pressing the DV test button in the test button group 1-2-1-6 closes solenoid valves 1 and 3, and opens solenoid valves 2 and 4. The opening and closing of the solenoid valves are controlled by the program. The program controls the opening and closing of solenoid valves 1-4 to achieve the following mask testing functions: 1. Leakage rate (negative pressure leakage rate), 2. Exhalation valve test, and DV function test: 1. No-medium-pressure seal, 2. Medium-pressure seal, 3. DV test.

[0030] It should be noted that the program for triggering the solenoid valve switch by a mechanical button can be directly implemented using existing technology. This is a very basic programming knowledge that anyone skilled in the art should master, and will not be elaborated upon in this embodiment.

[0031] In this embodiment, three gas storage tanks are set up: gas storage tank 1 1-2-1-14, gas storage tank 2 1-2-1-15, and gas storage tank 3 1-2-1-16. The purpose is to achieve gas pressure stabilization during testing. The principle behind this is as follows:

[0032] The primary function of a gas accumulator is to store gas. When a gas pump delivers gas to the system, excess gas can be stored in the accumulator. This helps to provide a stable gas supply when the system's gas demand fluctuates.

[0033] In a dynamic system, the demand and supply of gas can fluctuate constantly. When the gas demand in the system suddenly increases, the storage tank can release stored gas to meet the demand and prevent a sudden pressure drop. Conversely, when the gas supply is excessive, the storage tank can store the excess gas and prevent a sudden pressure rise.

[0034] The gas pressure inside the storage tank tends to reach equilibrium. Because gas is compressible, when the system pressure is higher than the pressure inside the storage tank, gas enters the tank, increasing the tank pressure; conversely, when the system pressure is lower than the tank pressure, gas is released into the system, increasing the system pressure. This dynamic equilibrium helps maintain stable system pressure.

[0035] Specifically, such as Figure 6 As shown, the air pump supplies gas to the pressure-stabilizing system, which consists of an air tank and a solenoid valve. The solenoid valve controls the direction and on / off flow of gas, ensuring that gas enters or leaves the air tank as needed. The safety valve prevents the system pressure from becoming too high; when the pressure exceeds a set value, the safety valve opens to release excess gas. The micro-pressure sensor monitors the pressure within the system and the air tank, ensuring that the pressure remains within a safe and stable range.

[0036] Furthermore, although the accumulator tank has a pressure-stabilizing function, an additional safety valve assembly is still required to handle extreme pressure situations. This is because the accumulator tank has a limited capacity; it can buffer pressure fluctuations within a certain range, but when the system experiences extreme pressure changes, such as a faulty gas pump continuously supplying gas to the system, or a sudden complete blockage at the gas outlet, the accumulator tank may not be able to fully absorb the excessive pressure generated under these extreme conditions. The safety valve assembly can automatically open and release excess gas when the system pressure exceeds a preset safety threshold, thereby preventing serious safety accidents such as explosions and pipeline ruptures caused by excessive system pressure. In engineering applications, multiple safety measures are typically employed to ensure system reliability. The accumulator tank is the first line of defense for pressure stabilization, while the safety valve assembly is the second line of defense. Even if the accumulator tank malfunctions, such as leaks or internal structural damage, the safety valve assembly can still prevent system pressure runaway. This redundant design conforms to best practices in engineering safety, ensuring that the system can still operate safely even if any single component fails.

[0037] The design concept of this embodiment is to realize a compact and small-scale air breathing apparatus (BBA) tester. Although the compact BBA tester cannot replace legally valid certification results issued by official testing institutions, it provides operators with a convenient and efficient daily testing method. Before entering high-risk work environments such as rescue sites, operators can quickly perform a preliminary screening of the air breathing apparatus using the compact BBA tester of this embodiment, promptly identifying potential problems such as minor mask leaks or abnormal air supply valve pressure, and then taking remedial measures such as repair or replacement of parts. In this way, operators can use air breathing apparatus with greater confidence in critical tasks such as rescue operations, greatly improving the safety and reliability of daily operations, and has significant practical value and market demand.

[0038] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on its differences from other embodiments. In particular, the device embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments. The above descriptions are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A compact breathing apparatus tester, characterized in that, The main components of the compact air breathing tester (1) include: a housing (1-1), a test platform (1-2), and a head mold (1-4), with the test platform (1-2) and the head mold (1-4) placed in the storage space of the housing (1-1); The front of the test platform (1-2) is equipped with a test platform operation interface (1-2-1), and the side of the test platform (1-2) is equipped with a head mold inflation and deflation port (1-2-2). The head mold connecting line (1-6) is used to connect the air port of the head mold (1-4) and the head mold inflation and deflation interface (1-2-2). The head molds (1-4) are used to mount the face mask to be tested; The mask connection cable (1-5) is used to connect the mask to be tested and the air supply valve connection connector (1-2-1-10).

2. The compact breathing apparatus according to claim 1, characterized in that, The test bench operation interface (1-2-1) is equipped with a display interface (1-2-1-1), a test countdown display interface (1-2-1-3), and a current air pressure value display interface (1-2-1-4). Below the display interface (1-2-1-1) are the display interface operation buttons (1-2-1-2), and below the current air pressure value display interface (1-2-1-4) are the device status and device power indicator lights (1-2-1-5). The middle area of ​​the test bench operation interface (1-2-1) is equipped with a test button group (1-2-1-6) and a power button (1-2-1-9). The power button (1-2-1-9) is used to trigger the compact air breathing tester (1) to be powered on or off. The lower area of ​​the test bench operation interface (1-2-1) is equipped with a head mold inflation and deflation button group (1-2-1-8) and an air supply valve connection connector (1-2-1-10), and the remaining blank area is printed with operation instructions (1-2-1-7).

3. The compact breathing apparatus according to claim 1 or 2, characterized in that, The display interface (1-2-1-1), the test countdown display interface (1-2-1-3), and the current air pressure value display interface (1-2-1-4) all use LCD screens; The operation buttons (1-2-1-2), test button group (1-2-1-6), power button (1-2-1-9), and head mold inflation / deflation button group (1-2-1-8) on the display interface are all mechanical buttons; The device status and power indicator lights (1-2-1-5) use LED bulbs; All LCD screens, mechanical buttons, and LED bulbs are connected to the circuit board assembly inside the test bench (1-2).

4. The compact breathing apparatus according to claim 1, characterized in that, The test bench (1-2) is equipped with a gas storage tank, which is connected to a solenoid valve assembly (1-2-1-11) to release the gas in the gas storage tank through the solenoid valve assembly (1-2-1-11); The air pump (1-2-1-12) is used to input the gas released from the gas tank into the head mold inflation / deflation port (1-2-2) or the gas supply valve connection connector (1-2-1-10).

5. The compact breathing apparatus according to claim 1 or 4, characterized in that, The air pump (1-2-1-12) is also used to introduce outside air into the air storage tank inside the test bench (1-2); Each gas storage tank is also equipped with a safety valve.

6. The compact breathing apparatus according to claim 1, characterized in that, The side of the test stand (1-2) also has an accessory storage space (1-3), which is used to store the mask connection cable (1-5), the head mold connection cable (1-6), the air supply valve adapter (1-7) and the mask adapter (1-8).

7. The compact breathing apparatus tester according to claim 1, characterized in that, The box (1-1) is a suitcase.

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