CN111679065A - Formaldehyde emission amount detection device and method principle thereof - Google Patents
Formaldehyde emission amount detection device and method principle thereof Download PDFInfo
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- CN111679065A CN111679065A CN202010501932.XA CN202010501932A CN111679065A CN 111679065 A CN111679065 A CN 111679065A CN 202010501932 A CN202010501932 A CN 202010501932A CN 111679065 A CN111679065 A CN 111679065A
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 title claims abstract description 180
- 238000001514 detection method Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000007246 mechanism Effects 0.000 claims abstract description 37
- 238000012360 testing method Methods 0.000 claims abstract description 22
- 238000005070 sampling Methods 0.000 claims description 17
- 238000003825 pressing Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 239000012153 distilled water Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 abstract description 29
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 11
- 239000002131 composite material Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 239000002023 wood Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000013028 emission testing Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/46—Wood
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0078—Testing material properties on manufactured objects
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Abstract
The invention relates to a formaldehyde emission detection device and a method principle thereof, belonging to the technical field of formaldehyde detection, the testing device comprises a box body, a containing cavity is formed in the box body, a door body communicated with the outside and the containing cavity is arranged on one side of the box body, a placing frame is arranged in the containing cavity, a vertical longitudinal plate and a horizontal transverse plate are fixedly arranged on the placing frame respectively, the longitudinal plate and the transverse plate are fixedly connected and are L-shaped, a sliding block is connected on the transverse plate in a sliding manner, a horizontal sliding groove is formed in the top end of the transverse plate, the sliding block is arranged in the sliding groove, a locking mechanism is connected with the sliding block and the transverse plate, a clamping plate is hinged to the top end of the sliding block, an operator opens the door body, a plate to be tested is placed on the placing frame, the plate is, the edge sealing treatment is carried out on the plate by matching the transverse plates and the longitudinal plates, and the edge sealing device has the effect of reducing the workload of operators.
Description
Technical Field
The invention relates to the technical field of formaldehyde detection, in particular to a formaldehyde emission amount detection device and a method principle thereof.
Background
At present, the formaldehyde emission detection climate box is suitable for the measurement of formaldehyde emission of indoor decorative materials such as various artificial boards and composite wood floors, the constant temperature and humidity balance treatment of wood or artificial boards, and can also be used for the detection of volatile harmful gases in other building materials. The design and manufacture are scientific and reasonable, the use is convenient, and the product is the first choice of units such as production enterprises, research institutions, technical supervision departments, universities and colleges. With the improvement of living standard of people, the use of artificial boards, composite wooden boards or other materials is increasing. However, materials such as artificial boards and composite wood boards are easy to adsorb harmful gases such as formaldehyde, and when the materials are installed and used indoors, the materials such as artificial boards and composite wood boards can slowly release formaldehyde, so that the health of people is affected.
The existing CN209842437U patent discloses a formaldehyde emission testing climatic chamber, which is used for measuring the formaldehyde emission in artificial boards, composite wooden boards or other materials, and comprises a chamber body, wherein a cavity is limited in the chamber body, at least one partition board is arranged in the cavity, a sampling hole, an air inlet hole and an air guide hole which are communicated with the cavity are arranged on the chamber body, and the cavity comprises: the mounting structure comprises an accommodating cavity and a mounting cavity; the door body is movably connected with the box body; the controller is arranged in the mounting cavity; the water circulation system is arranged in the mounting cavity; the fan is arranged in the mounting cavity; the heater is arranged in the accommodating cavity; the flowmeter is arranged in the accommodating cavity; the temperature sensor and the humidity sensor are arranged in the accommodating cavity at intervals; the heat exchanger is arranged in the mounting cavity.
The above prior art solutions have the following drawbacks: although the above-mentioned formaldehyde emission test climatic box can simulate the environmental condition of indoor climate, and then improve the side test accuracy and the efficiency of formaldehyde emission, when the operator tests the formaldehyde in the panel, according to the standard requirement of test, need seal 2.5 sides of being detected the panel, leave 1.5 sides for the gaseous divergence in the panel, the operator glues on the side of panel with the sticky tape that does not contain formaldehyde usually, and then seals the side of panel, causes the increase of operator's work load.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a formaldehyde emission detection device and a method principle thereof, which have the effect of reducing the workload of operators.
The above object of the present invention is achieved by the following technical solutions:
the utility model provides a formaldehyde emission detection device, includes the box, has seted up in the box and has held the cavity, and one side of box is equipped with the external door body that holds the cavity of intercommunication, it is equipped with the rack in the cavity to hold, has set firmly vertical longitudinal plate and horizontally diaphragm on the rack respectively, and longitudinal plate and diaphragm fixed connection just are "L" font, and sliding connection has the slider on the diaphragm, and the horizontally spout is seted up on the top of diaphragm, and in the spout was arranged in to the slider, the one end that the longitudinal plate was kept away from to the diaphragm was equipped with locking mechanism, locking mechanism link block and diaphragm, and the top of slider articulates there is splint, and the one end that the slider.
Through adopting above-mentioned technical scheme, the operator opens the door body earlier, the panel that will need the test is put on the rack, in the spout is arranged in to the bottom of panel, rethread locking mechanism, adjust the position of slider in the spout, and then press from both sides tight panel, rotate splint again, press from both sides tight one side at panel through clamping mechanism, the height that highly equals the half of panel height of splint, through the diaphragm, the mutually supporting of vertical plate and splint, seal panel side all around, only leave 1.5 sides, the operator of being convenient for changes different panels through clamping mechanism and locking mechanism, and then under the prerequisite that accords with panel test requirement, reduce operator's work load.
The present invention in a preferred example may be further configured to: vertical spacing grooves are formed in one ends, close to the transverse plates, of the longitudinal plates, and vertical clamping grooves are formed in one sides, close to the longitudinal plates, of the clamping plates.
Through adopting above-mentioned technical scheme, the spacing inslot is arranged in on one side of panel, and in the draw-in groove was arranged in to the another side of panel, through mutually supporting of spacing groove and draw-in groove, further inject the position of panel, improve the stability that panel was placed on the rack.
The present invention in a preferred example may be further configured to: the top of diaphragm sets firmly sealed the pad one, and sealed pad one is arranged in the spout, and one side that the longitudinal plate is close to the diaphragm sets firmly sealed the pad two, and sealed pad two is arranged in the spacing inslot, and the splint are close to the one end of longitudinal plate and set firmly sealed the pad three, and sealed pad three is arranged in the draw-in groove, and the slider just sets firmly sealed the pad four to one side of longitudinal plate.
Through adopting above-mentioned technical scheme, sealed pad one, sealed pad two, sealed pad three and sealed pad four are the rubber material, have elasticity, easily deformation's advantage, and when the side of panel was contradicted each other with sealed pad one, sealed pad two, sealed pad three and sealed pad four, sealed pad one, sealed pad two, sealed pad three and sealed pad four all take place deformation, and then improve the leakproofness to the panel side.
The present invention in a preferred example may be further configured to: the locking mechanism comprises a locking spring, the locking spring is arranged at one end, far away from the longitudinal plate, of the sliding groove, and two ends of the locking spring are respectively abutted against the sliding block and the transverse plate.
Through adopting above-mentioned technical scheme, before the spout is put into with panel to the operator, the operator slides the slider to locking spring's direction earlier, when panel put into the spout, loosens the slider again, and locking spring is in under the compression state this moment, applys an outside thrust to the slider, and then locks the position of panel in the spout, improves the stability that panel placed.
The present invention in a preferred example may be further configured to: and a limiting plate arranged above the locking spring is fixedly arranged at the top end of the transverse plate.
Through adopting above-mentioned technical scheme, the limiting plate can prevent that locking spring from popping out from the top of spout, plays the effect of injecing locking spring position.
The present invention in a preferred example may be further configured to: the locking mechanism comprises a horizontal locking screw rod, the locking screw rod penetrates through one end, far away from the longitudinal plate, of the transverse plate and is in threaded connection with the transverse plate, and one end of the locking screw rod is arranged in the sliding groove and is in rotating connection with the sliding block.
Through adopting above-mentioned technical scheme, the operator rotates locking screw, drives the slider through locking screw and slides in the spout, and then adjusts the position of slider in the spout, when panel was put in the spout, rotated locking screw and locked panel through the slider, further improved panel and arranged the stability in the spout in.
The present invention in a preferred example may be further configured to: the clamping mechanism comprises a clamping plate, the clamping plate is in a shape like a Chinese character 'ji', the clamping plate is arranged on one side, close to the longitudinal plate, of the clamping plate, and a clamping rod is in threaded connection with one side of the clamping plate.
Through adopting above-mentioned technical scheme, when splint were in under the vertical state, the opening of pinch-off blades was vertical form and just to the vertical board, and when one side of panel was as for in the pinch-off blades, the operator rotated the tight pole of clamp, contradicts with panel until the tip of pressing from both sides tight pole, through the cooperation of pinch-off blades and tight pole of clamp, realized pressing from both sides tightly panel, pressed from both sides splint tightly on the side of panel, further improved the leakproofness of splint to the panel side.
The present invention in a preferred example may be further configured to: the end part of the clamping rod is rotatably connected with a clamping pad, and the clamping pad is arranged in the clamping plate.
Through adopting above-mentioned technical scheme, press from both sides tight pad and be the rubber material, when pressing from both sides tight pad and panel conflict, press from both sides tight pad and play the effect of action between buffering clamping rod and the panel, stability when further improving the tight panel of clamp.
The present invention in a preferred example may be further configured to: the clamping mechanism comprises a clamp body, the clamp body is in a shape like a Chinese character 'ji' with two inwards inclined ends, the clamp body is arranged on one side of the clamp plate close to the longitudinal plate, the outer side walls at the two ends of the clamp body are respectively hinged with a pressing handle, and one end, far away from the clamp body, of the pressing handle extends out of the clamp body.
Through adopting above-mentioned technical scheme, the clamp is the metal material, and the clamp is mutually supported with the pressure handle, and the operator presses two pressure handles to the direction that is close to each other, and then opens the clamp, puts into the clamp with panel again in, and then presss from both sides the clamp plate tightly on the side of panel, further improves the leakproofness of clamp plate to the panel side.
The technical purpose of the invention is realized by the following technical scheme: a method principle of a formaldehyde emission detection device comprises the following steps: the method comprises the steps of putting a plate with the surface area of 1 square meter into a climate box with the temperature, the relative humidity, the air flow rate and the air replacement rate controlled at certain values, releasing formaldehyde from the plate, mixing the formaldehyde with air in the box, periodically extracting the air in the box, enabling the extracted air to pass through an absorption bottle filled with distilled water, dissolving all formaldehyde in the air into water, measuring the formaldehyde amount in an absorption liquid and the volume of the extracted air, calculating the formaldehyde amount in each cubic meter of air by using milligrams per cubic meter, and periodically sampling until the concentration of the formaldehyde in the test box reaches an equilibrium state.
By adopting the technical scheme, sampling is not needed on the 1 st day of the test, then sampling is carried out 2 times every day from the 2 nd day to the 5 th day, the time interval of each sampling is more than 3h, and after the previous 3 days, if the stable state is reached, the sampling can be stopped, so that when the deviation value between the average value and the maximum value or the small value of the formaldehyde concentration of 4 times of measurement is less than 5 percent or less than 0.005mg/m3, the stable state can be defined to be reached.
In summary, the invention includes at least one of the following beneficial technical effects:
1. an operator opens a door body firstly, a plate to be tested is placed on the placing frame, the bottom end of the plate is placed in the sliding groove, the position of the sliding block in the sliding groove is adjusted through the locking mechanism, the plate is clamped, then the clamping plate is rotated, the clamping plate is clamped on one side of the plate through the clamping mechanism, the height of the clamping plate is equal to half of the height of the plate, the side edges around the plate are sealed through the mutual matching of the transverse plate, the longitudinal plate and the clamping plate, only 1.5 side edges are left, the operator can conveniently replace different plates through the clamping mechanism and the locking mechanism, and the workload of the operator is reduced on the premise that the testing requirements of the plate are met;
2. on day 1 of the test, no sampling was required, and then from day 2 to day 5, sampling was performed 2 times per day, with each sampling interval exceeding 3 hours, and after the first 3 days, sampling was stopped if steady state was reached, and therefore, when the deviation between the average value and the maximum or small value of the formaldehyde concentration measured 4 times was less than 5% or less than 0.005mg/m3, it was defined as reaching steady state.
Drawings
FIG. 1 is a schematic structural diagram of the first embodiment;
FIG. 2 is a schematic structural view of a placement frame, a transverse plate and a longitudinal plate in the first embodiment;
FIG. 3 is a cross-sectional view of the cross plate and the side plates in a first embodiment;
FIG. 4 is an enlarged partial schematic view of portion A of FIG. 3;
FIG. 5 is a schematic structural view of the placement frame, the transverse plate and the longitudinal plate in the second embodiment;
FIG. 6 is a schematic structural view of the placement frame, the transverse plate and the longitudinal plate in the third embodiment;
FIG. 7 is a cross-sectional view of three cross plates and a longitudinal plate of the embodiment.
In the figure, 1, a box body; 11. a receiving cavity; 2. a door body; 21. a door handle; 3. placing a rack; 4. a longitudinal plate; 41. a limiting groove; 42. a second sealing gasket; 5. a transverse plate; 51. a chute; 52. a first sealing gasket; 6. a slider; 61. a fourth sealing gasket; 7. a splint; 71. a card slot; 72. a third sealing gasket; 8. a locking mechanism; 81. a locking spring; 82. locking the grip; 83. a limiting plate; 84. locking the screw rod; 85. locking the rotating handle; 9. a clamping mechanism; 91. a clamping plate; 92. a clamping lever; 93. clamping the rotating handle; 94. a clamping pad; 95. a clip body; 96. and (4) pressing the handle.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Implementing one step:
referring to fig. 1 and 2, the invention discloses a formaldehyde emission amount detection device, which comprises a cuboid box body 1, wherein a cuboid accommodating cavity 11 is formed in the box body 1, a door body 2 communicated with the outside and the accommodating cavity 11 is hinged to one side of the box body 1, the door body 2 is square, and a door handle 21 is fixedly arranged on one side of the door body 2. The formaldehyde emission amount detection device is the prior art, and will not be described in detail herein. An operator holds the door handle 21 to open the door body 2, and places the plate to be detected into the box body 1, so as to detect the formaldehyde emission of the plate.
Referring to fig. 2 and 3, the accommodating cavity 11 is provided with a placing frame 3 for supporting and fixing the plate. Two vertical longitudinal plates 4 and two horizontal transverse plates 5 are fixedly arranged on the placing frame 3 respectively, the two sides of the placing frame 3 are arranged on the two longitudinal plates 4 respectively, the two sides of the placing frame 3 are arranged on the two transverse plates 5 respectively, and the longitudinal plates 4 and the transverse plates 5 are both in a long strip shape. The end part of the vertical plate 4 is fixedly connected with the end part of the transverse plate 5 and is in an L shape. Sliding connection has square slider 6 on diaphragm 5, and horizontal spout 51 is seted up on the top of diaphragm 5, and slider 6 arranges in spout 51 and slider 6's width equals spout 51's width, and the one end that longitudinal plate 4 was kept away from to diaphragm 5 installs locking mechanism 8, and locking mechanism 8 link block 6 and diaphragm 5, and the top of slider 6 articulates there is splint 7, and splint 7 is rectangular form, and the one end that slider 6 was kept away from to splint 7 is equipped with clamping mechanism 9. The operator puts the panel that needs the test on rack 3, in spout 51 is arranged in to the bottom of panel, rethread locking mechanism 8, adjust the position of slider 6 in spout 51, and then pinch-off blades 91 material, rotate splint 7 again, press from both sides splint 7 tight in one side of panel through clamping mechanism 9, splint 7 highly equals the half of panel height, through diaphragm 5, the mutually supporting of vertical plate 4 and splint 7, seal panel side all around, only leave 1.5 sides, the operator of being convenient for changes different panels through clamping mechanism 9 and locking mechanism 8.
Referring to fig. 3 and 4, the locking mechanism 8 includes a locking spring 81, the locking spring 81 is disposed at one end of the sliding slot 51 far away from the longitudinal plate 4, and two ends of the locking spring 81 respectively abut against the sliding block 6 and the transverse plate 5. Before the operator puts the panel into the spout 51, the operator slides the slider 6 to the direction of locking spring 81 earlier, when the panel was put into the spout 51, loosens the slider 6 again, and locking spring 81 was in under the compression state this moment, applys an outside thrust to slider 6, and then locks panel in the spout 51, improves the stability that the panel was placed. The top end of the sliding block 6 is fixedly provided with a locking grip 82, which is convenient for an operator to pull the sliding block 6. The top end of the transverse plate 5 is fixedly provided with a limit plate 83 arranged above the locking spring 81, and the limit plate 83 can prevent the locking spring 81 from popping out from the top end of the sliding chute 51, so as to limit the position of the locking spring 81.
Referring to fig. 2 and 3, the clamping mechanism 9 includes a clamping plate 91, the clamping plate 91 is in a shape of a Chinese character 'ji', the clamping plate 91 is disposed on one side of the clamping plate 7 close to the longitudinal plate 4, and a horizontal clamping rod 92 is screwed on one side of the clamping plate 91. When splint 7 is in vertical state, the opening of clamp plate 91 is vertical form and just to vertical board 4, and when one side of panel was in clamp plate 91, the operator rotated clamp rod 92, and when the tip of clamp rod 92 was contradicted with panel, through the cooperation of clamp plate 91 and clamp rod 92, the realization was tight to the clamp of panel, presss from both sides splint 7 tightly on the side of panel. The end of the clamping rod 92 is rotatably connected with a square clamping pad 94, the clamping pad 94 is arranged in the clamping plate 91, the clamping pad 94 is made of rubber, and when the clamping pad 94 abuts against the plate, the clamping pad 94 plays a role in buffering the action force between the clamping rod 92 and the plate, so that the stability of the clamping plate 91 is further improved. A circular clamping stem 93 is mounted to the end of the clamping lever 92 remote from the clamping pad 94 to facilitate rotation of the clamping lever 92 by an operator.
Referring to fig. 3 and 4, a vertical limiting groove 41 is formed at one end of the longitudinal plate 4 close to the transverse plate 5, a vertical clamping groove 71 is formed at one side of the clamping plate 7 close to the longitudinal plate 4, and the clamping groove 71 is long-strip-shaped. One side of the plate is arranged in the limiting groove 41, the other side of the plate is arranged in the clamping groove 71, the position of the plate is further limited through the mutual matching of the limiting groove 41 and the clamping groove 71, and the stability of the plate placed on the placing frame 3 (refer to fig. 2) is improved. The top end of the transverse plate 5 is fixedly provided with a first sealing gasket 52, the first sealing gasket 52 is arranged in the sliding groove 51 and matched with the bottom surface of the sliding groove 51, and the sliding block 6 is arranged on the first sealing gasket 52. One side of the longitudinal plate 4 close to the transverse plate 5 is fixedly provided with a second sealing gasket 42, and the second sealing gasket 42 is arranged in the limiting groove 41 and is matched with the bottom surface of the limiting groove 41. One end of the clamping plate 7 close to the longitudinal plate 4 is fixedly provided with a third sealing gasket 72, and the third sealing gasket 72 is arranged in the clamping groove 71 and is matched with the bottom surface of the clamping groove 71. And a sealing gasket IV 61 is fixedly arranged on one side of the sliding block 6 opposite to the longitudinal plate 4, and the shape and size of the sealing gasket IV 61 are matched with the shape and size of the side surface of the sliding block 6. The first sealing gasket 52, the second sealing gasket 42, the third sealing gasket 72 and the fourth sealing gasket 61 are made of rubber materials, and have the advantages of elasticity and easiness in deformation, when the side edge of the plate is mutually abutted against the first sealing gasket 52, the second sealing gasket 42, the third sealing gasket 72 and the fourth sealing gasket 61, the first sealing gasket 52, the second sealing gasket 42, the third sealing gasket 72 and the fourth sealing gasket 61 are all deformed, and the sealing performance of the side edge of the plate is improved.
The implementation principle of the embodiment is as follows: an operator opens the door body 2, firstly pulls the sliding block 6 through the locking handle 82, puts the plate to be tested into the limiting groove 41 and the sliding groove 51, then loosens the sliding block 6, locks the plate through the locking spring 81, then rotates the clamping plate 7 to enable the two ends of the clamping plate 91 to be respectively arranged at the two sides of the plate, then rotates the clamping rotating handle 93 until the clamping pad 94 is abutted against the plate, clamps the plate 91, then closes the door body 2, and detects the formaldehyde release amount of the plate.
Example two:
referring to fig. 5, the difference between the second embodiment and the first embodiment is that the clamping mechanism 9 is different, the clamping mechanism 9 includes a clamp body 95, the clamp body 95 is in a shape of a Chinese character 'ji' with two inwardly inclined ends, the clamp body 95 is disposed on one side of the clamp plate 7 close to the longitudinal plate 4, outer side walls of two ends of the clamp body 95 are respectively hinged with a pressing handle 96, and one end of the pressing handle 96 far from the clamp body 95 extends out of the clamp body 95. The clamp 95 is made of metal, the clamp 95 is matched with the pressing handles 96, an operator presses the two pressing handles 96 in the direction close to each other, the clamp 95 is opened, the plate is placed into the clamp 95, the clamp 7 is clamped on the side edge of the plate, and the sealing performance of the clamp 7 on the side edge of the plate is further improved.
The implementation principle of the embodiment is as follows: an operator opens the door body 2, rotates the locking rotating handle 85 first, drives the sliding block 6 to slide through the locking screw 84, puts the plate to be tested into the limiting groove 41 and the sliding groove 51, rotates the locking rotating handle 85 again, locks the plate through the locking screw 84, rotates the clamping plate 7 again, presses the pressing handle 96 simultaneously, opens the two ends of the clamp 95, further arranges the two ends of the clamp 95 on the two sides of the plate respectively, releases the pressing handle 96 again, clamps the plate 91 through the clamp 95, closes the door body 2 again, and detects the formaldehyde release amount of the plate.
Example three:
referring to fig. 6 and 7, the difference between the third embodiment and the first embodiment is that the locking mechanism 8 is different, the locking mechanism 8 includes a horizontal locking screw 84, the locking screw 84 penetrates through one end of the transverse plate 5 away from the longitudinal plate 4 and is in threaded connection with the transverse plate 5, one end of the locking screw 84 is disposed in the sliding groove 51 and is rotatably connected with the slider 6, a circular locking rotating handle 85 is fixedly disposed at one end of the locking screw 84 away from the slider 6, and the locking rotating handle 85 is disposed at one side of the transverse plate 5. The operator rotates locking turning handle 85, drives slider 6 through locking screw 84 and slides in spout 51, and then adjusts the position of slider 6 in spout 51, and when panel was put in spout 51, rotation locking turning handle 85 locked panel through slider 6, improved the stability that panel arranged in spout 51.
The implementation principle of the embodiment is as follows: an operator opens the door body 2, rotates the locking rotating handle 85 first, drives the sliding block 6 to slide through the locking screw 84, puts the plate to be tested into the limiting groove 41 and the sliding groove 51, rotates the locking rotating handle 85 again, locks the plate through the locking screw 84, rotates the clamping plate 7 again to enable the two ends of the clamping plate 91 to be respectively arranged at the two sides of the plate, rotates the clamping rotating handle 93 again until the clamping pad 94 is abutted to the plate, clamps the plate 91, closes the door body 2 again, and detects the formaldehyde release amount of the plate.
Example four:
a method principle of a formaldehyde emission detection device comprises the following steps:
placing a plate with the surface area of 1 square meter into a climate box with the temperature, the relative humidity, the air flow rate and the air replacement rate controlled at certain values, releasing formaldehyde from the plate, mixing the formaldehyde with air in the box, periodically extracting the air in the box, passing the extracted air through an absorption bottle filled with distilled water, and completely dissolving the formaldehyde in the air into the water; the formaldehyde content in the absorption liquid and the volume of the air to be pumped are measured, expressed in milligrams per cubic meter, and the formaldehyde content per cubic meter of the air is calculated, and sampling is periodically carried out until the formaldehyde concentration in the test chamber reaches an equilibrium state.
The dimensions of the plates are length = (500+5) mm and width = (500+5) mm, the number of the plates is two, and the surface area of the test piece is 1 square meter. When the length and the width of the test piece are smaller than the required sizes, the test piece is allowed to be spliced by adopting a method which does not influence the measurement result.
Placing (15 Shi 2) d plates at the temperature of 23 Shi 1 ℃ and the relative humidity (50 Shi 5)% and keeping the distance between the plates at least 25 mm; the air is circulated freely on the surfaces of all the test pieces, the replacement rate of the indoor air at constant temperature and humidity is at least 1 time per hour, and the mass concentration of the formaldehyde in the indoor air cannot exceed 0.10mg/m 3.
On day 1 of the test, no sampling was required, and then from day 2 to day 5, sampling was performed 2 times per day, with each sampling interval exceeding 3 hours, and after the first 3 days, sampling was stopped if steady state was reached, and therefore, when the deviation between the average and maximum or minimum values of formaldehyde concentration measured 4 times was less than 5% or less than 0.005mg/m3, it was defined as reaching steady state.
On holidays (e.g. weekends) the sampling may be cancelled, but steady state determination should be postponed until 4 measurements are completed. If steady state was not reached in the first 5 days, the number of samples should be reduced to once per day until steady state was reached, or the test 28d could be continued and then stopped.
The formaldehyde emission is the average of the concentrations measured 4 times when steady state is reached and cannot be recorded if the test does not reach steady state within 28 days, in which case the average of the concentrations measured 4 times may be recorded as "temporary formaldehyde emission" with the following statement "steady state not reached". The measured value of the formaldehyde emission at steady state was taken as the formaldehyde emission of the sheet material to 0.01mg/m3, and the test time (in hours) until the steady state emission was reached after the measured value was indicated by parentheses.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. The utility model provides a formaldehyde emission detection device, includes box (1), has seted up in box (1) and has held cavity (11), and one side of box (1) is equipped with the external door body (2) that hold cavity (11), its characterized in that of intercommunication: be equipped with rack (3) in holding cavity (11), vertical longitudinal plate (4) and horizontally diaphragm (5) have set firmly on rack (3) respectively, longitudinal plate (4) and diaphragm (5) fixed connection just are "L" font, sliding connection has slider (6) on diaphragm (5), horizontally spout (51) are seted up on the top of diaphragm (5), spout (51) are arranged in to slider (6), the one end that longitudinal plate (4) were kept away from in diaphragm (5) is equipped with locking mechanism (8), locking mechanism (8) link block (6) and diaphragm (5), the top of slider (6) articulates there is splint (7), the one end that slider (6) were kept away from in splint (7) is equipped with clamping mechanism (9).
2. The formaldehyde emission amount detection device according to claim 1, characterized in that: vertical limiting grooves (41) are formed in one ends, close to the transverse plates (5), of the longitudinal plates (4), and vertical clamping grooves (71) are formed in one sides, close to the longitudinal plates (4), of the clamping plates (7).
3. The formaldehyde emission amount detection device according to claim 2, characterized in that: the top of diaphragm (5) sets firmly sealed pad (52), and sealed pad (52) are arranged in spout (51), and one side that vertical plate (4) are close to diaphragm (5) sets firmly sealed pad two (42), and sealed pad two (42) are arranged in spacing groove (41), and splint (7) are close to one end of vertical plate (4) and have set firmly sealed pad three (72), and in draw-in groove (71) were arranged in sealed pad three (72), and slider (6) just have set firmly sealed pad four (61) to one side of vertical plate (4).
4. The formaldehyde emission amount detection device according to claim 1, characterized in that: locking mechanism (8) are including locking spring (81), and one end that spout (51) kept away from vertical plate (4) is arranged in locking spring (81), and the both ends of locking spring (81) are contradicted each other with slider (6), diaphragm (5) respectively.
5. The formaldehyde emission amount detection device according to claim 4, characterized in that: and a limiting plate (83) arranged above the locking spring (81) is fixedly arranged at the top end of the transverse plate (5).
6. The formaldehyde emission amount detection device according to claim 1, characterized in that: locking mechanism (8) include horizontally locking screw (84), locking screw (84) run through diaphragm (5) and keep away from the one end of longitudinal slab (4) and with diaphragm (5) threaded connection, the one end of locking screw (84) is arranged in spout (51) and is rotated with slider (6) and be connected.
7. The formaldehyde emission amount detection device according to claim 1, characterized in that: the clamping mechanism (9) comprises a clamping plate (91), the clamping plate (91) is in a shape like a Chinese character 'ji', the clamping plate (91) is arranged on one side, close to the longitudinal plate (4), of the clamping plate (7), and a clamping rod (92) is connected to one side of the clamping plate (91) through threads.
8. The formaldehyde emission amount detection device according to claim 7, characterized in that: the end part of the clamping rod (92) is rotatably connected with a clamping pad (94), and the clamping pad (94) is arranged in the clamping plate (91).
9. The formaldehyde emission amount detection device according to claim 1, characterized in that: the clamping mechanism (9) comprises a clamp body (95), the clamp body (95) is in a shape like a Chinese character 'ji' with two inwards inclined ends, the clamp body (95) is arranged on one side, close to the longitudinal plate (4), of the clamp plate (7), pressing handles (96) are hinged to the outer side walls of the two ends of the clamp body (95) respectively, and one end, far away from the clamp body (95), of each pressing handle (96) extends out of the clamp body (95).
10. A method principle for the formaldehyde emission amount detection device according to any one of claims 1 to 9, characterized in that: the method comprises the steps of putting a plate with the surface area of 1 square meter into a climate box with the temperature, the relative humidity, the air flow rate and the air replacement rate controlled at certain values, releasing formaldehyde from the plate, mixing the formaldehyde with air in the box, periodically extracting the air in the box, enabling the extracted air to pass through an absorption bottle filled with distilled water, dissolving all formaldehyde in the air into water, measuring the formaldehyde amount in an absorption liquid and the volume of the extracted air, calculating the formaldehyde amount in each cubic meter of air by using milligrams per cubic meter, and periodically sampling until the concentration of the formaldehyde in the test box reaches an equilibrium state.
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Address after: No. 1919, Shuanghe East Road, Laishan District, Yantai City, Shandong Province Applicant after: Yantai Construction Engineering Testing Service Center Co.,Ltd. Address before: No. 1919, Shuanghe East Road, Laishan District, Yantai City, Shandong Province Applicant before: Yantai Construction Engineering Testing Service Center |
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