Formaldehyde detection box and detection method thereof

Abstract

The formaldehyde detection box comprises a box body with an opening in one end, a containing cavity is formed in the box body, the opening end of the box body is detachably connected with a cover body, the joint of the box body and the cover body is provided with a first sealing structure, the cover body is provided with at least two containing positions, one ends of the containing positions extend into the containing cavity, and knob bottles are installed in the containing positions. Material powder or liquid is arranged in the knob bottle, a second sealing structure is arranged at the joint of the containing position and the knob bottle, a rotary guiding structure is arranged between the end, away from the containing cavity, of the containing position and the knob bottle, and a plurality of communicating windows for materials to flow into the containing cavity are formed in the end, close to the containing cavity, of the containing position in the circumferential direction. The sealing device has the beneficial effects that the sealing performance is better, the operation is more convenient, all materials can be mixed only after being started, and the harm of premixed reagents to the environment or human bodies is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of formaldehyde detection, and in particular to a formaldehyde detection box and a detection method thereof. Background Art

[0002] Commonly used decoration materials, such as paint, coating, floor covering, wallpaper, plywood, plastic, polyvinyl chloride (PVC) board, insulation materials, and indoor artificial boards, such as sandwich panels, ash and other types of board glued veneers, density board furniture and works of art, will release volatile organic compounds. Various countries have conducted a lot of research and discussion on the nature and harm of pollution, among which the most harmful is the formaldehyde pollution that has long been known to people; Formaldehyde has a great impact on the human body. Long-term exposure to formaldehyde-polluted environments can cause the following hazards: chronic respiratory diseases, nasopharyngeal cancer, colon cancer, brain tumors, menstrual disorders, gene mutations in the cell nucleus, cross-linking within a single DNA strand and between DNA and protein, inhibition of DNA damage repair, pregnancy syndrome, chromosomal abnormalities and leukemia in newborns, and decreased memory and intelligence in adolescents. The hazards of formaldehyde are so great that the market demand for formaldehyde detection equipment is also huge; Existing household formaldehyde gas detection products mainly include formaldehyde detectors and formaldehyde gas detection kits. Among them, the existing formaldehyde detection instruments are generally expensive, ranging from hundreds to thousands of yuan. Formaldehyde detectors can be called "useless" for consumers, because after consumers complete the formaldehyde test, the formaldehyde detectors are often idle and will not be used in the future, which results in a waste of resources; another formaldehyde detection product is the formaldehyde gas detection kit. The traditional formaldehyde gas detection kit includes an absorption box, a diluent in a brown reagent bottle, a color developer in a colorless reagent bottle, and a colorimetric card. When testing, you need to tear open the formaldehyde reaction powder reagent package and add it to the absorption box, then add the diluent to the absorption box, and then add the color developer to the absorption box. After a period of time, read the formaldehyde gas concentration against the colorimetric card. This method is cumbersome to operate; In view of this, the Chinese invention patent with patent number CN108931519B discloses a formaldehyde gas detection box and a detection method, which comprises a test paper fixing disk, on which a test paper is coiled, and on which a cut mark for convenient tearing is provided; a test kit, which is movably connected to the test paper fixing disk, and a cavity is provided inside the test kit, and a reactant is provided in the cavity for pre-reacting with the test paper; a reaction vessel, which is movably connected to the test kit, and is a disc-shaped structure, and a plurality of protrusions are provided on the bottom surface of the disc-shaped structure for carrying the test paper to react with the air, and a color developing card is provided on the outer wall of the disc-shaped structure for comparing the test paper after the reaction to read the data; by adopting this structure, multiple detections can be achieved with fewer operation steps; However, the reactants in this structure are pre-mixed in the reagent chamber. If the test kit is not sealed well, air can easily enter, causing the reactants in the test kit to be reacted before detection, resulting in inaccurate test results. In view of this, this type of test kit needs to be improved. Summary of the invention

[0003] The technical problem to be solved by the present invention is to address the deficiencies of the above-mentioned prior art. Provided are a formaldehyde detection box and a detection method thereof which have better sealing performance, are more convenient to operate, and require each detection material to be opened before mixing.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a formaldehyde detection box, comprising a box body with an opening at one end, a accommodating cavity being arranged in the box body, characterized in that: pure water is arranged in the accommodating cavity, a cover body is detachably connected to the open end of the box body, a first sealing structure is arranged at the connection between the box body and the cover body, at least two accommodating positions with one end extending into the accommodating cavity are arranged on the cover body, a knob bottle is installed in the accommodating position, at least one knob bottle is arranged with a phenol reagent, and at least one knob bottle is arranged with a color developer, a second sealing structure is arranged at the connection between the accommodating position and the knob bottle, a rotating guide structure is arranged between the end of the accommodating position away from the accommodating cavity and the knob bottle, and a plurality of connecting windows are circumferentially arranged at the end of the accommodating position close to the accommodating cavity for materials to flow into the accommodating cavity.

[0005] The above technical solution is adopted. The principle of the present invention is that pure water is stored in the accommodating cavity of the box body, phenol reagent is placed in a knob bottle, and color developer is placed in another knob bottle. This arrangement replaces the problem of directly placing the reactant in the box body in the prior art, which causes the reactant to react with the ambient air due to sealing problems, resulting in inaccurate detection results. When in use, first unscrew the knob bottle containing the phenol reagent, shake it to allow the phenol reagent to fully fall into the water of the box body through the connecting window and fully blend, open the cover body, and let it stand for 30 minutes to allow the phenol reagent to be fully fused in the box body. The liquid absorbs formaldehyde in the air, and the cover is reinstalled on the box body. Another knob bottle containing a color developer is unscrewed and the box body is shaken to fully blend the color developer with the solution in the accommodating cavity. After standing for 15 minutes, the cover is opened and the formaldehyde content in the air is obtained after comparison with the color card. Since the first sealing structure is provided at the connection between the box body and the cover body and the second sealing structure is provided at the connection between the accommodating position and the knob bottle, the sealing of water and powder is ensured, the problem of inaccurate detection caused by the premixed solution reacting with the air in the environment in advance is avoided, and the detection accuracy is improved.

[0006] The above-mentioned formaldehyde detection box can be further configured as follows: the rotating guide structure includes at least one group of guide notches opened on the accommodating position, a guide surface is provided at one end of the guide notch, and the knob bottle is provided with a plurality of guide strips on the guide surface, and the guide strip is adapted to be arranged at one end facing the guide surface.

[0007] By adopting the above technical solution, since at least one group of guide notches is opened in the circumferential direction of the accommodating position, the guide strip arranged on the knob bottle is adapted to the guide surface, so that when the knob bottle is rotated, the knob bottle will move upward along the guide surface so that the seal between the knob bottle and the accommodating position is released, so that the material can enter the pure water in the accommodating chamber through the connecting window for mixing, and the guide structure is simple and easy to use.

[0008] The above-mentioned formaldehyde detection box can be further configured as follows: the first sealing structure includes a first sealing ring and a second sealing ring concentrically arranged on the inner wall of the cover body toward one end of the box body after the cover body is connected to the box body, and there is a gap between the first sealing ring and the second sealing ring; the box body is provided with a sealing wall extending toward the inside of the cover body and located in the gap, and the sealing wall is tightly fitted with the first sealing ring.

[0009] By adopting the above technical scheme, a first sealing ring and a second sealing ring which are concentrically and spaced apart are arranged in the cover body, and a sealing wall which extends into the gap between the first sealing ring and the second sealing ring is arranged in the box body. Sealing is achieved by the first sealing ring, the sealing wall and the second sealing ring. When sealing, the second sealing ring may be tightly fitted with the sealing wall or may just be in contact with it, but the first sealing ring must be tightly fitted with the sealing wall.

[0010] The above-mentioned formaldehyde detection box can be further configured as follows: a first abutting surface is provided on the first sealing ring, and a second abutting surface adapted to the first abutting surface is provided on the sealing wall at a position corresponding to the first abutting surface, and the sealing wall is tightly matched with the first abutting surface of the first sealing ring through the second abutting surface.

[0011] By adopting the above technical solution, a first abutting surface is provided on the first sealing ring, and a second abutting surface is provided on the sealing wall at a position corresponding to the abutting surface, and a tight fit is achieved by abutting the first abutting surface and the second abutting surface, thereby improving the sealing performance.

[0012] The above-mentioned formaldehyde detection box can be further configured as follows: after being installed in the accommodating position, the knob bottle is opened toward one end of the accommodating cavity and a third sealing structure is provided between the knob bottle and the accommodating position.

[0013] By adopting the above technical solution, a third sealing structure is provided at one end of the knob bottle facing the accommodating cavity to ensure the sealing of the material after the material is loaded into the knob bottle and assembled in the accommodating position, thereby improving the sealing performance and preventing the material from getting damp.

[0014] The above-mentioned formaldehyde detection box can be further configured as follows: the third sealing structure includes a sealing boss arranged at the center position of the bottom of the accommodating position, a sealing ring groove is arranged on the sealing boss, and the knob bottle is provided with a sealing ring wall extending into the sealing ring groove at a position corresponding to the sealing ring groove, and a fourth sealing structure is provided between the outer wall of the knob bottle and the inner wall of the accommodating position.

[0015] By adopting the above technical solution, the sealing performance of the knob bottle is ensured by providing a sealing ring groove and a sealing ring wall to prevent the material from getting wet, and the sealing ability of the knob bottle is further improved by providing a fourth sealing structure.

[0016] The above-mentioned formaldehyde detection box can be further configured as follows: the fourth sealing structure is at least three sealing rings arranged at intervals on the outer wall of the knob bottle, and the sealing rings are arranged in contact with the inner wall of the accommodating position.

[0017] By adopting the above technical solution, a plurality of spaced sealing rings are arranged on the outer wall of the knob bottle, and the sealing rings are closely matched with the inner wall of the accommodating position, thereby further improving the sealing ability of the knob bottle.

[0018] The above-mentioned formaldehyde detection box can be further configured as follows: the number of the guide notches is two groups, and they are relatively arranged in the accommodating positions, and the number of the guide strips is three.

[0019] By adopting the above technical solution, two groups of guide notches are provided to make the screwing out of the knob bottle more stable, and three guide strips are provided to make the guidance more precise.

[0020] The above-mentioned formaldehyde detection box can be further configured as follows: the number of the sealing rings is four.

[0021] By adopting the above technical solution and arranging four spaced sealing rings, the sealing performance of the knob bottle is further improved.

[0022] The detection method of using the above formaldehyde detection box is as follows: S1 unscrews the knob bottle containing the phenol reagent, shakes the box body so that the phenol reagent fully falls into the pure water in the box body through the connecting window and fully blends with the pure water, opens the cover body, and leaves it to stand for 30 minutes; S2: Allow the liquid containing phenol reagent in the box to absorb formaldehyde in the air, reinstall the cover on the box, unscrew the other knob bottle containing the color developer, and shake the box to fully blend the color developer with the solution in the chamber, and let it stand for 15 minutes: S3 opens the cover and compares it with the color card to get the formaldehyde content in the air; The beneficial effects of the present invention are: better sealing performance, more convenient operation, and each material needs to be opened before mixing, thereby preventing the pre-mixed reagents from causing harm to the environment or human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention (wherein a knob bottle is in a screwed-out state); Figure 2 It is a schematic diagram of the explosion structure of an embodiment of the present invention; Figure 3 It is a schematic diagram of the top view structure of the present invention; Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of the AA section; Figure 5 This is an enlarged structural schematic diagram of a knob bottle according to an embodiment of the present invention; Figure 6 The enlarged structure diagram of the cover body of the embodiment of the present invention is shown in FIG. Figure 1 ; Figure 7 The enlarged structure diagram of the cover body of the embodiment of the present invention is shown in FIG. Figure 2 ; Figure 8 It is a schematic diagram of the enlarged structure of the box body of an embodiment of the present invention; DETAILED DESCRIPTION

[0024] See also Figures 1 to 8 As shown, a formaldehyde detection box comprises a box body 1 with an opening 11 at one end, a receiving cavity 12 is arranged in the box body 1, and a cover body 2 is detachably connected to one end of the opening 11 of the box body 1. Specifically, a threaded connection similar to that between the mouth of a mineral water bottle and the bottle cap can be arranged between the box body 1 and the cover body 2. The specific structure can refer to the thread of an existing mineral water bottle. This technology is a prior art and is not described in detail herein. A first sealing structure is arranged at the connection between the box body 1 and the cover body 2, and two receiving positions 21 with one end extending into the receiving cavity 12 are arranged on the cover body 2. Knob bottles 3 are installed in the receiving positions 21, and material powder or liquid is arranged in the knob bottle 3. A second sealing structure is arranged at the connection between the receiving position 21 and the knob bottle 3, and a rotation guide structure is arranged between the end of the receiving position 21 away from the receiving cavity 12 and the knob bottle 3, and a plurality of connecting windows 13 for material to flow into the receiving cavity 12 are circumferentially arranged at one end of the receiving position 21 close to the receiving cavity 12; The principle of the present invention is to store pure water in the accommodating cavity of the box body, place phenol reagent in a knob bottle, and place color developer in another knob bottle. This arrangement replaces the problem in the prior art that the reactant is directly placed in the box body, and the reactant reacts with the ambient air due to the sealing problem, resulting in inaccurate detection results. When in use, first unscrew the knob bottle containing the phenol reagent, shake it so that the phenol reagent fully falls into the water of the box body through the connecting window and is fully fused, open the cover body, and let it stand for 30 minutes to allow the liquid fused with the phenol reagent in the box body to absorb the phenol reagent. For formaldehyde in the air, reinstall the cover on the box body, unscrew another knob bottle containing a color developer, and then shake the box body to fully blend the color developer with the solution in the accommodating cavity. After standing for 15 minutes, open the cover body, and compare it with the color card to obtain the formaldehyde content in the air. The present invention provides a first sealing structure at the connection between the box body and the cover body, and a second sealing structure at the connection between the accommodating position and the knob bottle, thereby ensuring the sealing of water and powder, avoiding the problem of inaccurate detection caused by the premixed solution reacting with the air in the environment in advance, and improving the detection accuracy. The rotary guide structure includes two sets of guide notches 211 arranged opposite to each other on the accommodation position 21, one end of the guide notch 211 is provided with a guide surface 212, and the knob bottle 3 is provided with a plurality of guide strips 31 on the guide surface 212, and one end of the guide strip 31 facing the guide surface 212 is adapted to be arranged with the guide surface 212; Since at least one set of guide notches is provided in the circumferential direction of the receiving position, the guide strips provided on the knob bottle are adapted to the guide surface, so that when the knob bottle is rotated, the knob bottle moves upward along the guide surface, thereby releasing the seal between the knob bottle and the receiving position, so that the material can enter the pure water in the receiving chamber through the communication window for mixing, and the guide structure is simple and easy to use; The first sealing structure includes a first sealing ring 22 and a second sealing ring 23 which are concentrically arranged on the inner wall of the cover body 2 toward one end of the box body 1 after the cover body 2 is connected to the box body 1, a gap 24 is provided between the first sealing ring 22 and the second sealing ring 23, and a sealing wall 14 is provided on the box body 1, which extends toward the inside of the cover body 2 and is located in the gap 24, and the sealing wall 14 and the first sealing ring 22 are tightly fitted; A first sealing ring and a second sealing ring are arranged concentrically and spaced apart in the cover body, and a sealing wall extending into the gap between the first sealing ring and the second sealing ring is arranged in the box body. Sealing is achieved by the first sealing ring, the sealing wall and the second sealing ring. When sealing, the second sealing ring can be tightly matched with the sealing wall or just in contact with it, but the first sealing ring must be tightly matched with the sealing wall. The first sealing ring 22 is provided with a first abutting surface 221, and the sealing wall 14 is provided with a second abutting surface adapted to the first abutting surface 221 at a position corresponding to the first abutting surface 221, and the sealing wall 14 is tightly matched with the first abutting surface 221 of the first sealing ring 22 through the second abutting surface; By adopting the above technical solution, a first abutting surface is provided on the first sealing ring, and a second abutting surface is provided on the sealing wall at a position corresponding to the abutting surface, and a tight fit is achieved by abutting the first abutting surface and the second abutting surface, thereby improving the sealing performance.

[0025] After being installed in the accommodating position 21, the knob bottle 3 is opened toward one end of the accommodating cavity 12 and a third sealing structure is provided between the knob bottle 3 and the accommodating position 21; By arranging a third sealing structure at one end of the knob bottle facing the accommodating cavity, the sealing of the material is ensured after the material is loaded into the knob bottle and assembled in the accommodating position, thereby improving the sealing performance and preventing the material from being damp; The third sealing structure includes a sealing boss 25 disposed at the center of the bottom of the accommodation position 21, a sealing ring groove 251 is provided on the sealing boss 25, a sealing ring wall 32 extending into the sealing ring groove 251 is provided on the knob bottle 3 at a position corresponding to the sealing ring groove 251, and a fourth sealing structure is provided between the outer wall of the knob bottle 3 and the inner wall of the accommodation position 21; By providing a sealing ring groove and a sealing ring wall, the sealing performance of the knob bottle is ensured to prevent the material from being dampened, and the sealing ability of the knob bottle is further improved by providing a fourth sealing structure; The fourth sealing structure is four sealing rings 33 arranged at intervals on the outer wall of the knob bottle 3, and the sealing rings 33 are arranged in contact with the inner wall of the accommodating position 21; A plurality of spaced sealing rings are arranged on the outer wall of the knob bottle, and the sealing rings are closely matched with the inner wall of the receiving position, thereby further improving the sealing ability of the knob bottle; The number of the guide notches 211 is two groups, and they are arranged oppositely in the accommodating position 21; By setting two sets of guide notches, the screwing out of the knob bottle is more stable; The number of guide strips 31 is three; By setting three guide strips, the guidance is more accurate; The number of sealing rings 33 is four; By setting four spaced sealing rings, the sealing performance of the knob bottle is further improved; The detection method using the above formaldehyde detection kit comprises: S1 unscrew the knob bottle containing phenol reagent, shake the box body to allow the phenol reagent to fully fall into the pure water in the box body through the connecting window and fully blend with the pure water, open the cover body, and let it stand for 30 minutes; S2: Allow the liquid containing phenol reagent in the box to absorb formaldehyde in the air, reinstall the cover on the box, unscrew the other knob bottle containing the color developer, and shake the box to fully blend the color developer with the solution in the chamber, and let it stand for 15 minutes: S3 opens the cover and compares it with the color card to get the formaldehyde content in the air; The beneficial effects of the present invention are: better sealing performance, more convenient operation, and each material needs to be opened before mixing, thereby preventing the pre-mixed reagents from causing harm to the environment or human body.

Claims

1. A formaldehyde detection box, comprising a box body with an opening at one end, wherein a containing cavity is provided in the box body, characterized in that: Purified water is provided in the accommodating chamber, a cover body is detachably connected to an open end of the box body, a first sealing structure is provided at the connection between the box body and the cover body, at least two accommodating positions with one end extending into the accommodating chamber are provided on the cover body, a knob bottle is installed in the accommodating position, at least one knob bottle is provided with a phenol reagent, and at least one knob bottle is provided with a color developer, a second sealing structure is provided at the connection between the accommodating position and the knob bottle, a rotating guide structure is provided between the end of the accommodating position away from the accommodating chamber and the knob bottle, and a plurality of connecting windows are circumferentially provided at the end of the accommodating position close to the accommodating chamber for materials to flow into the accommodating chamber.

2. A formaldehyde detection kit according to claim 1, characterized in that: The rotary guide structure includes at least one group of guide notches opened on the accommodating position, a guide surface is arranged at one end of the guide notch, a plurality of guide strips are arranged on the guide surface of the knob bottle, and one end of the guide strips facing the guide surface is adapted to the guide surface.

3. A formaldehyde detection kit according to claim 1 or 2, characterized in that: The first sealing structure includes a first sealing ring and a second sealing ring which are concentrically arranged on the inner wall of the cover body toward one end of the box body after the cover body is connected to the box body, and there is a gap between the first sealing ring and the second sealing ring. The box body is provided with a sealing wall extending toward the inside of the cover body and located in the gap, and the sealing wall is tightly fitted with the first sealing ring.

4. A formaldehyde detection kit according to claim 3, characterized in that: The first sealing ring is provided with a first abutting surface, the sealing wall is provided with a second abutting surface adapted to the first abutting surface at a position corresponding to the first abutting surface, and the sealing wall is tightly matched with the first abutting surface of the first sealing ring through the second abutting surface.

5. A formaldehyde detection kit according to claim 1, characterized in that: After being installed in the accommodating position, the knob bottle is opened toward one end of the accommodating cavity and a third sealing structure is arranged between the knob bottle and the accommodating position.

6. A formaldehyde detection kit according to claim 5, characterized in that: The third sealing structure includes a sealing boss arranged at the center position of the bottom of the accommodating position, a sealing ring groove is arranged on the sealing boss, and the knob bottle is provided with a sealing ring wall extending into the sealing ring groove at a position corresponding to the sealing ring groove, and a fourth sealing structure is arranged between the outer wall of the knob bottle and the inner wall of the accommodating position.

7. A formaldehyde detection kit according to claim 6, characterized in that: The fourth sealing structure is at least three sealing rings arranged at intervals on the outer wall of the knob bottle, and the sealing rings are arranged in contact with the inner wall of the accommodating position.

8. A formaldehyde detection kit according to claim 2, characterized in that: The number of the guide notches is two groups, and they are relatively arranged in the accommodating positions, and the number of the guide strips is three.

9. A formaldehyde detection kit according to claim 7, characterized in that: The number of the sealing rings is four.

10. A detection method using the formaldehyde detection kit according to any one of claims 1 to 9, characterized in that: S1 unscrew the knob bottle containing phenol reagent, shake the box body to allow the phenol reagent to fully fall into the pure water in the box body through the connecting window and fully blend with the pure water, open the cover body, and let it stand for 30 minutes; S2: Allow the liquid containing phenol reagent in the box to absorb formaldehyde in the air, reinstall the cover on the box, unscrew the other knob bottle containing the color developer, and shake the box to fully blend the color developer with the solution in the chamber, and let it stand for 15 minutes: S3 opens the cover and compares it with the color card to obtain the formaldehyde content in the air.

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