CN116223335A - Detection device for self-priming filter respirator - Google Patents

Abstract

The invention discloses a detection device for a self-priming filter respirator, which comprises: the connector is used for being tightly connected with the filter box of the respirator, and the connector is provided with a detection air hole; the detection interface of the detection box is used for being connected with the detection air hole, a reagent port and a test paper port are formed in the detection box, the reagent port is used for receiving a reagent, the test paper port is used for placing test paper, the test paper port is formed between the detection interface and the reagent port, and the detection interface, the reagent port and the test paper port are communicated through the inside of the detection box. The detection box is connected with the respirator to be detected through the connector, so that self-detection under the state of wearing the respirator is realized.

Description

Detection device for self-priming filter respirator

Technical Field

The invention relates to the technical field of respirator detection equipment, in particular to a detection device for a self-priming filter respirator.

Background

The self-priming filter respirator consists of an adhesive mask body and a filter element, and the high adhesion between the mask body and the face and the high filtering efficiency of the filter element are the necessary conditions for the respirator to play a role in protection. The effectiveness of current respiratory protection articles is commonly determined by testing the suitability of the user, testing the filter element for failure, and determining whether the respirator is failed.

The purpose of the suitability test is to detect the fit of the mask to the face of the user, and is classified into a qualitative suitability test and a quantitative suitability test. The specific method is that after the testee wears the respiratory protection articles, the testee enters a relatively closed test space which is scattered with a nontoxic or low-toxicity test agent, and the existence or concentration of the test agent in the face mask is detected by a qualitative or quantitative method, so that the effectiveness of the respiratory protection articles is judged. Wherein the qualitative detection makes a suitability determination by the subject of the subjective perception of taste or irritation of the test agent escaping into the mask; qualitative suitability detection the suitability determination is made by measuring the concentration of the test agent in the mask by means of a high-precision instrument and calculating a suitability factor.

The qualitative suitability test has low detection cost, is convenient and quick, but the test result is invisible, has high dependence on subjective feeling and matching will of the testee, and has lower test fidelity. Quantitative suitability detection requires specialized technical equipment, test conditions and personnel, and has high inspection cost although the result is relatively accurate. And at present, two tests cannot be independently operated, and all the tests need independent closed detection space and auxiliary cooperation of other personnel except a user.

The filter element protection time test is a destructive test, so that the initial filter element invalidation judgment mainly refers to the theoretical estimated protection time of a filter element production factory, and combines whether a user can smell peculiar smell in the actual use process to judge the filter element invalidation. The theoretically estimated protection time is generally obtained by sampling the protection time according to the working condition of the working scene by a production factory, analyzing and determining the concentration of pollutants under the actual working condition, and then carrying out theoretical calculation. However, the actual concentration of pollutants changes at any time, the filtering performance of the filtering element is affected by the storage time, the actual temperature and humidity and other environments, and the theoretical estimation shows that the protection time cannot truly reflect whether the wearer fails at the moment of actual use. If the user changes after smelling the peculiar smell, the user is exposed to the pollutant and does not play a role in early warning of failure of the respirator.

A quantitative detection device for testing the failure performance of the filter element in real time recently appears, so that the failure test of the filter element is advanced from a theoretical estimation stage to a real-time test stage, but the device still only tests the failure performance of the filter element, and cannot test and characterize the whole respirator containing the filter element, and the suitability of the mask body and the face is not considered.

Disclosure of Invention

In order to solve at least one aspect of the above problems, the present invention provides a detection device for a self-priming filter respirator, comprising: the connector is used for being tightly connected with the filter box of the respirator, and the connector is provided with a detection air hole; the detection kit comprises a detection interface, wherein the detection interface is used for being connected with a detection air hole, a reagent port and a test paper port are formed in the detection kit, the reagent port is used for receiving a reagent, the test paper port is used for placing test paper, the test paper port is formed between the detection interface and the reagent port, and the detection interface, the reagent port and the test paper port are communicated through the inside of the detection kit.

Preferably, the connector is provided with an escape air hole, and the escape air hole adopts a sealable structure.

Preferably, the escape air hole adopts a spring valve.

Preferably, a groove is formed in the bottom of the detection box, and a connecting line of the groove and the reagent port is perpendicular to a horizontal plane.

Preferably, the detection box further comprises a flow guide pipe, and the flow guide pipe is fixedly arranged above the reagent port.

Preferably, the device further comprises a connecting pipe, wherein the first end of the connecting pipe is tightly connected with the detection air hole, and the second end of the connecting pipe is tightly connected with the detection interface of the detection box.

Preferably, the detection air hole is provided with an annular boss, the annular boss is provided with an internal thread, and the first end of the connecting pipe is provided with an external thread corresponding to the internal thread of the annular boss.

Preferably, the connecting pipe is made of a bendable flexible material.

Preferably, the connector adopts a sleeve structure, and the connector is in snap connection with a filter box of the respirator.

Preferably, the connector is made of an elastic material, so that the inner wall of the connector is in interference fit with the outer wall of the filter box of the respirator.

The detection device for the self-priming filter respirator has the following beneficial effects: the connector is used for realizing tight connection with the filter box of the self-priming filter respirator, further realizing the sealing performance of the respirator in a wearing state, realizing the timeliness test of the filter box of the respirator through the connection of the detection air hole of the connector and the detection box, and being rapid and convenient, visual in result, capable of entering a polluted area, and capable of being independently operated by a single person and directly carrying out failure qualitative test on the whole respirator, thereby solving the problems that in the practical application scene of the suitability detection of respiratory protection supplies, the qualitative suitability test has high subjective feeling dependency degree of a testee, the test result is invisible, and the quantitative suitability test is limited by site equipment and has poor convenience.

Drawings

For a better understanding of the above and other objects, features, advantages and functions of the present invention, reference should be made to the embodiments illustrated in the drawings. Like reference numerals refer to like parts throughout the drawings. It will be appreciated by persons skilled in the art that the drawings are intended to schematically illustrate preferred embodiments of the invention, and that the scope of the invention is not limited in any way by the drawings, and that the various components are not drawn to scale.

FIG. 1 shows a schematic structural view of a detection device for a self-priming filter respirator in accordance with an embodiment of the present invention;

FIG. 2 illustrates a schematic view of an application scenario of a detection device for a self-priming filter respirator according to an embodiment of the present invention;

FIG. 3 illustrates another application scenario schematic of a detection device for a self-priming filter respirator according to an embodiment of the present invention;

fig. 4 shows a schematic structural view of a suitable self-priming filter respirator for use in a detection device for a self-priming filter respirator in accordance with an embodiment of the present invention.

Description of the drawings:

1. a connector; 2. a detection box; 3. a connecting pipe; 4. test paper; 5. a detection reagent; 11. detecting air holes; 12. escape air holes; 21. detecting an interface; 22. a reagent port; 23. a test paper port; 24. a groove; 25. a flow guiding pipe; 61. a face mask; 62. a filter box; 63. a headband.

Detailed Description

Exemplary embodiments of the present disclosure are described below in conjunction with the accompanying drawings, which include various details of the embodiments of the present disclosure to facilitate understanding, and should be considered as merely exemplary. Accordingly, one of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present disclosure. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

The term "comprising" and variations thereof as used herein means open ended, i.e., "including but not limited to. The term "or" means "and/or" unless specifically stated otherwise. The term "based on" means "based at least in part on". The terms "one example embodiment" and "one embodiment" mean "at least one example embodiment. The term "another embodiment" means "at least one additional embodiment". The terms "first," "second," and the like, may refer to different or the same object. Other explicit and implicit definitions are also possible below.

To at least partially address one or more of the above problems, as well as other potential problems, one embodiment of the present disclosure proposes a detection device for a self-priming filtering respirator, comprising: the connector 1 is used for being tightly connected with a filter box of the respirator, and the connector 1 is provided with adetection air hole 11; thedetection interface 21 of thedetection box 2, thedetection interface 21 is used for connecting thedetection air hole 11, areagent port 22 and atest paper port 23 are formed in thedetection box 2, thereagent port 22 is used for receiving reagents, thetest paper port 23 is used for placing test paper, thetest paper port 23 is formed between thedetection interface 21 and thereagent port 22, and thedetection interface 21, thereagent port 22 and thetest paper port 23 are communicated through the inside of thedetection box 2.

Specifically, as shown in fig. 1, the connector 1 adopts a sleeve structure, and the connector 1 is in snap connection with a filter box of the respirator. In some embodiments, the connector 1 employs a cylindrical sleeve comprising a bottom disc and an annular sidewall, the connector 1 being sleeved outside the filter cartridge of the respirator to be tested to achieve a tight connection of the connector 1 and the filter cartridge of the respirator to be tested. Thedetection air holes 11 are formed in the bottom disc of the connector 1, and thedetection air holes 11 enable two sides of the bottom disc of the connector 1 to be communicated. The exhaled air from the state of wearing the respirator to be detected is passed through the filter box and then passes through the connector 1 from thedetection air hole 11. In a further embodiment, the connector 1 adopts a drop-shaped sleeve structure comprising a drop-shaped bottom and a side wall, the drop-shaped bottom being in use matched with the external shape of the filter cartridge of the respirator to be tested to achieve a sealed connection; alternatively, in other embodiments, the connector 1 employs an oval sleeve structure comprising an oval base and side walls, the oval base being in form-fit with the exterior of the cartridge of the respirator to be tested to effect a sealed connection in use.

Thedetection box 2 adopts a shell structure, the inside of the detection box is hollow, thedetection interface 21 is tightly connected with thedetection air hole 11, so that the exhaled air passes through thedetection air hole 11 and flows from thedetection interface 21 to thedetection box 2 when the respirator to be detected is worn, as shown in fig. 2 and 3, thereagent port 22 is used for receiving detection reagent, thetest paper port 23 is arranged between thedetection interface 21 and thereagent port 22, and the detection test paper can verify that the combination of the detection reagent and the test paper is effective when the test paper is inserted through thetest paper port 23. The selection of the detection reagent and the test paper is judged according to the protection object of the filter box of the respirator to be detected, so that the proper detection reagent and test paper are selected. For example, when the object to be protected of the cartridge is an organic acid gas, the detection reagent is acetic acid solution, and the test paper is PH test paper. As will be appreciated by those skilled in the art, any effective combination of detection reagent and test paper may be selected depending on the protective object of the respirator cartridge to be detected, subject to the ability to accurately determine the effectiveness of the respirator cartridge to be detected.

The connector 1 is used alone to sleeve the respirator to be detected to carry out the air tightness test by adopting a direct pressure method, the respirator to be detected is worn, the connector 1 is clamped on the filter box of the respirator to be detected, after the connector is ready to carry out the test, thedetection air hole 11 is closed, the air is slowly inhaled, the mask of the respirator to be detected can slightly collapse inwards, the breath is held for a plurality of seconds, under the airtight condition, the negative pressure in the connector 1 can cause the deformation of the mask body, the deformation can be maintained for a period of time, the detection result of the tightness of the respirator is visible, and if the mask continues to keep the collapse state, the mask body and the mask body are well sealed with the face of a user. Otherwise, the mask position and the tightness of the headband need to be adjusted to be good.

As shown in fig. 2 and 3, when the failure of the filter box is detected, the to-be-detected respirator is worn, the connector 1 is tightly sleeved on the filter box of the to-be-detected respirator, thedetection interface 21 of thedetection box 2 is tightly connected with thedetection air hole 11, the test paper 4 is inserted into thetest paper port 23, thedetection reagent 5 is dripped from thereagent port 22, the motion state of wearing the to-be-detected respirator is simulated, the color of the test paper 4 is observed after a preset time, and whether the to-be-detected respirator fails is judged according to the color change of the test paper 4 and the test paper in the respirator cavity. Or in another embodiment, a control test paper is placed in the mask of the respirator to be tested, and during the test, the test paper is color-changed by thetest box 2, and the test paper in the mask is also color-changed, which indicates that leakage exists, and the respirator is invalid, so that the respirator needs to be prevented from entering a working scene. It will be appreciated by those skilled in the art that in other embodiments, any combination ofdetection reagent 5 and test strip 4 may be selected that has a visual response, and that when a chemical indicator encounters a concentration of detection reagent, a visual change, such as a color, precipitation, fluorescent response, etc., occurs, and that can visually determine cartridge failure.

In some embodiments, the connector 1 employs a resilient material to provide an interference fit between the inner wall of the connector 1 and the outer wall of the cartridge of the respirator.

Specifically, the connector 1 adopts PE material, and when the sleeve structure of the connector 1 is sleeved with the filter box of the respirator to be detected, the side wall of the connector 1 is tightly attached to the outer wall of the filter box of the respirator to be detected, so that the filter box of the respirator to be detected of the connector 1 is tightly connected. In other embodiments, the connector 1 is made of rubber material, etc., so that the filter box of the respirator to be detected by the connector 1 can be tightly connected.

In some embodiments, the connector 1 is provided with anescape vent 12, and theescape vent 12 adopts a sealable structure.

Specifically, as shown in fig. 1 to 3, theescape vent hole 12 and thedetection vent hole 11 are formed on the same plane, theescape vent hole 12 is a through hole, and when theescape vent hole 12 is opened, the gas exhaled in the state of wearing the respirator to be detected can pass through the connector 1 through theescape vent hole 12. Theescape air hole 12 is used for avoiding accidents caused by different long-time air paths when the to-be-detected respirator is worn to connect with the machine 1 for detection. Theescape air hole 12 maintains a sealed state when the respirator to be detected is subjected to the tightness test.

In some embodiments, escapevent 12 employs a spring valve. In particular, the convenience of one-handed operation is increased by employing a spring valve. In another embodiment, theescape vent 12 further includes a boss and a sealing cover, the boss adopts a cylindrical shell structure, the bottom end of the boss is fixedly arranged on the connector 1, the sealing cover is movably connected to the top end of the boss, and the sealing cover is in interference fit with the boss when being buckled so as to realize sealing.

In some embodiments, the bottom of thecartridge 2 is provided with a recess 24, the line connecting the recess 24 with thereagent port 22 being perpendicular to the horizontal plane.

Specifically, as shown in fig. 2 and 3, the groove 24 opens the bottom of thedetection cartridge 2, and is located directly below thereagent port 22, and when thedetection reagent 5 is added to thedetection cartridge 2 through thereagent port 22, the groove 24 causes thedetection reagent 5 to gather at the bottom, avoiding the flow of the detection reagent.

In some embodiments, thecartridge 2 further comprises aflow guide 25, theflow guide 25 being fixedly arranged above thereagent port 22.

Specifically, as shown in fig. 2 and 3, theflow guide tube 25 has a cylindrical housing structure, and is disposed above thedesign port 22 so as to collect liquid when thedetection reagent 5 is added.

In some embodiments, the device further comprises a connecting pipe 3, wherein a first end of the connecting pipe 3 is tightly connected with thedetection air hole 11, and a second end of the connecting pipe 3 is tightly connected with thedetection interface 21 of thedetection box 2.

Specifically, as shown in fig. 3, two ends of the connecting tube 3 are respectively and tightly connected with the connector 1 and the detectingbox 2, and the distance between the detectingbox 2 and the connector 1 is increased through the connecting tube 3, so that the operation and the observation of the state of the test paper 4 of the detectingbox 2 are convenient for a single person to use.

In some embodiments, thedetection air hole 11 is provided with an annular boss, the annular boss is provided with an internal thread, and the first end of the connection pipe 3 is provided with an external thread corresponding to the internal thread of the annular boss.

Specifically, as shown in fig. 1 to 3, the inner wall of the annular boss of thedetection air hole 11 is tightly connected with the connection pipe 3 by screw threads. In other embodiments, one end of the connecting pipe 3 is fixed at thedetection interface 21 of thedetection unit 2, and in use, only thedetection air hole 11 and the moving end of the connecting pipe 3 are required to be connected, so that the detection efficiency is improved.

In some embodiments, the connecting tube 3 is made of a bendable flexible material. Specifically, the connecting pipe 3 is a hose made of rubber material, a connecting piece is arranged at the connecting end of the connecting pipe and the connector 1, and an external thread corresponding to the internal thread of thedetection air hole 11 is arranged on the outer wall of the connecting piece.

Example 1

The respirator to be tested, for example, the light series half mask of An Danda, as shown in fig. 4, includes aface mask 61, afilter cartridge 62, and aheadband 63. The detection device for the self-priming filter respirator comprises a connector 1, adetection box 2 and a connecting pipe 3, wherein the connector 1 comprises adetection air hole 11 and anescape air hole 12, the connector 1 adopts a cylindrical structure to match the structure of afilter box 62 of the respirator to be detected, thedetection box 2 is provided with adetection interface 21, areagent port 22 and atest paper port 23, and two ends of the connecting pipe 3 are respectively provided with a connecting part corresponding to thedetection air hole 11 and thedetection interface 21.

First, the adhesion is detected. Theescape vent 12 on the connector 1 is kept open, thedetection vent 11 is closed, the respirator is worn, and the tool connector 1 is buckled on thefilter box 62. The hand is placed on theescape vent 12, and the state of the connector 1 is ready to be switched. After the test is ready, theescape vent 12 is closed. Themask 61 gently collapses inwardly and holds the breath for several seconds, and if themask 61 continues to remain collapsed, this indicates that the seal between thecartridge 62 and themask 61 body and the user's face is good. Otherwise, the position of themask 61 and the tightness of theheadband 63 need to be adjusted to be good.

And secondly, selecting a detection reagent. Judging the protection object of the filter box, and selecting proper detection reagent and detection test paper.

And thirdly, detecting the invalidation of the filter box. Thedetection interface 21 of thedetection box 2 is tightly connected with thedetection air hole 11 of the connector 1 through the connecting pipe 3, the control test paper 4 is inserted into thetest paper port 23 of thedetection box 2, thedetection reagent 5 is added through thereagent port 22, and meanwhile, the detection test paper is placed in theface mask 61.

And step four, simulating normal breathing actions. The subject performs the following actions, each lasting for 60s.

1) Normal respiration;

2) Deep breathing, mimicking heavy physical labor;

3) Shaking the head left and right to simulate the possible amplitude in the operation;

4) Head up and head down, mimicking the amplitude that may occur in a job;

5) Speaking or reciting a text, the volume is enough to be heard by nearby people;

6) Other actions are designed according to the operation characteristics.

If the test paper 4 changes color during the test, but the test paper in themask 61 does not change color, it indicates that there is leakage, and the respirator fails, and it is necessary to avoid entering the working scene.

The connector of the embodiment of the invention is composed of micro-elastic plastic, and escape air holes for switching the sealing state are reserved on the connector. The micro-bullet main body of the connector is tightly sealed with the respirator filter box to be detected through a physical structure, and can be directly and completely clamped on the respirator filter box to be detected after the user wears the breathing protector, so that the inspection scene is not limited, and the filter element is not required to be disassembled. The escape vent hole of the connector can assist the respirator to form a sealing space capable of instantaneously switching the sealing state, so that the starting time and the ending time of the test are instantaneously controllable, and the choking risk in the test process is prevented. By the combined configuration of the inspection agent and the indicator, the visualization of the test result is realized. The indicator is a chemical reagent, and under the condition of a certain medium, the color of the indicator can be changed, turbidity or precipitation can be generated, fluorescence phenomenon exists, and the like. The harmful substances are simulated by using a nontoxic or low-toxicity testing agent, and the testing agent is loaded in the groove of the detection box to form a testing medium together with air. The test medium is conducted to one end of the filter box through the inside of the test box, the indicator reacts on the inner side of the mask after contacting with the test medium, whether the respirator has leakage or not can be judged qualitatively, and the detection result is visual.

The foregoing description of the embodiments of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvement in the marketplace, or to enable others of ordinary skill in the art to understand the disclosure.

Claims (10)

1. A detection device for a self-priming filter respirator, comprising:

the connector (1) is used for being tightly connected with a filter box of the respirator, and the connector (1) is provided with a detection air hole (11);

the detection kit comprises a detection kit body (2), a detection interface (21) of the detection kit body (2), wherein the detection interface (21) is used for being connected with a detection air hole (11), a reagent port (22) and a test paper port (23) are formed in the detection kit body (2), the reagent port (22) is used for receiving a reagent, the test paper port (23) is used for placing test paper, the test paper port (23) is formed between the detection interface (21) and the reagent port (22), and the detection interface (21), the reagent port (22) and the test paper port (23) are communicated through the inside of the detection kit body (2).

2. The device according to claim 1, wherein the connector (1) is provided with an escape vent (12), and the escape vent (12) adopts a sealable structure.

3. The device according to claim 2, characterized in that the escape vent (12) employs a spring valve.

4. A device according to claim 3, characterized in that the bottom of the cartridge (2) is provided with a recess (24), the line connecting the recess (24) with the reagent port (22) being perpendicular to the horizontal plane.

5. The device according to claim 4, wherein the cartridge (2) further comprises a flow guide (25), the flow guide (25) being fixedly arranged above the reagent port (22).

6. The device according to claim 5, further comprising a connection tube (3), a first end of the connection tube (3) being in close connection with the detection air hole (11), and a second end of the connection tube (3) being in close connection with the detection interface (21) of the detection cartridge (2).

7. The device according to claim 6, characterized in that the detection air hole (11) is provided with an annular boss provided with an internal thread, and the first end of the connecting tube (3) is provided with an external thread corresponding to the internal thread of the annular boss.

8. Device according to claim 7, characterized in that the connecting tube (3) is made of a bendable flexible material.

9. The device according to claim 1, characterized in that the connector (1) is of a sleeve structure, the connector (1) being snap-connected to the cartridge of the respirator.

10. The device according to claim 9, wherein the connector (1) is made of an elastic material such that the inner wall of the connector (1) is in an interference fit with the outer wall of the cartridge of the respirator.

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