CN216361808U

CN216361808U - Desicator formula formaldehyde clearance detection device

Info

Publication number: CN216361808U
Application number: CN202123088762.6U
Authority: CN
Inventors: 关恩浩
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-12-10
Filing date: 2021-12-10
Publication date: 2022-04-22
Anticipated expiration: 2031-12-10

Abstract

The utility model provides a dryer type formaldehyde removal rate detection device, which comprises a dryer body, a dryer upper cover, a partition plate, a water container and a sample holder, wherein the dryer body is provided with a water inlet and a water outlet; the dryer body is divided into an upper cavity and a lower cavity by the partition plate, and the partition plate is provided with a partition plate through hole; the water container is arranged in the lower cavity; the sample holder is arranged in the upper cavity; an upper cover plug is also arranged on the upper cover of the dryer; the upper cover plug is inserted with a sampling component; the sampling assembly comprises a water guide pipe and a first air guide pipe which are vertically inserted in the upper cover plug; the water guide pipe is communicated with the outer side of the upper cover of the dryer and the water container; the first air duct is communicated with the outer side of the upper cover of the dryer and the dryer body; the upper end of the water guide pipe is provided with a first regulating valve; the upper end of the first air duct is provided with a second regulating valve. The utility model improves the sampling structure of the dryer type formaldehyde detection device, is beneficial to more accurately obtaining the formaldehyde removal rate data of the sample, and reduces the deviation of the detection data caused by detection equipment and operation.

Description

Desicator formula formaldehyde clearance detection device

Technical Field

The utility model relates to the field of formaldehyde detection equipment or laboratory equipment, in particular to a dryer type formaldehyde removal rate detection device.

Background

At present, in the detection industry, the detection of formaldehyde emission of artificial boards mainly executes the standards GB18580-2017 and GB/T17657-2013, most laboratories adopt a large-volume test environment chamber or climate box as a sampling box, and some laboratories adopt a dryer method for detection. The common standards related to the formaldehyde removal rate are JC/T1074-.

The air test chamber is adopted for detection, the chamber body is large in size and is provided with a through hole for air exchange with the outside, and large errors and dispersion exist in data of detection results.

When the dryer method is adopted in a laboratory for detection, data distortion can also be caused due to the influence of factors such as an operation mode, a plate fixing mode and the like. Such as: the gas in the extraction dryer is used as a detection sample, and the uniformity of the gas is difficult to ensure, so that the same sample exists, and the result of multiple detections has larger deviation under the same test condition. In addition, most of the plate clamps arranged in the existing dryer type device have the defects of inconvenient operation, unstable clamping and the like.

Therefore, the present invention provides an improved dryer-type formaldehyde removal rate detection device to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a dryer type formaldehyde removal rate detection device which is convenient for air extraction sampling detection and water addition absorption detection so as to improve the detection accuracy and facilitate operation.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a dryer type formaldehyde removal rate detection device comprises a dryer body, a dryer upper cover, a partition plate, a water container and a sample holder; the dryer upper cover covers the dryer body; the partition plate is positioned in the dryer body and divides the dryer body into an upper cavity and a lower cavity; the partition plate is provided with a plurality of partition plate through holes, and the upper cavity and the lower cavity are communicated with each other through the partition plate through holes in a water-gas mode; the water container is an open container and is arranged in the lower cavity; the sample holder is arranged in the upper cavity and is used for fixing an object to be detected; the upper cover of the dryer is also provided with an upper cover through hole; an upper cover plug is arranged in the upper cover through hole and is tightly embedded into the upper cover through hole;

in particular: the upper cover plug is inserted with a sampling component; the sampling assembly comprises a water guide pipe and a first air guide pipe which are vertically inserted in the upper cover plug; the upper end of the water guide pipe is positioned outside the upper cover of the dryer, and the lower end of the water guide pipe is positioned in the water container; the water guide pipe is used for guiding liquid into the water containing vessel; the upper end of the first air duct is positioned outside the upper cover of the dryer, and the lower end of the first air duct is positioned in the dryer body; the first gas guide pipe is used for guiding out gas in the dryer body; the upper end of the water guide pipe is provided with a first regulating valve; and a second regulating valve is arranged at the upper end of the first air duct.

The utility model provides a dryer type formaldehyde removal rate detection device, which comprises the following components in use: preparing two devices, wherein one device is used for fixing an object to be detected by using a sample holder, the other device is used for placing no sample as a contrast, and then the upper cover of the dryer is sealed and covered on the dryer body; after a certain time, water for absorbing formaldehyde is added into the water containing vessel through the water guide pipe, and the water is taken out for detection after 24 hours; or the article to be detected can be placed in a sealed dryer under the condition that water is not added into the water container, and after the article to be detected is released for a certain time, the gas in the dryer is extracted through the first gas guide tube to be detected.

Further, for convenient detection, the sampling assembly further comprises a sample bottle and a sampling instrument. The upper end of the water guide pipe and the upper end of the first air guide pipe are respectively connected with the input end of a sample bottle through pipelines, and the output end of the sample bottle is connected with the sampling instrument; and a suction pump is arranged in the sampler. When a sample is taken, the sample vial may be pre-filled with an appropriate absorbent solution.

In order to facilitate sampling operation, preferably, the upper end of the water guide pipe is connected with a first sampling pipe, the upper end of the first air guide pipe is connected with a second sampling pipe, the first sampling pipe and the second sampling pipe are communicated and connected with a third sampling pipe, and a sample bottle is further connected through the third sampling pipe; the input end of the sample bottle is connected with the third sampling pipe, and the output end of the sample bottle is connected with a sampling instrument; a suction pump is arranged in the sampler; a third regulating valve is arranged at the junction of the first sampling pipe and the second sampling pipe; the third regulating valve is a three-way valve.

Still further, the first regulating valve is also a three-way valve; one end of the first regulating valve is connected with the upper end of the water guide pipe, one end of the first regulating valve is connected with the first sampling pipe, and one end of the first regulating valve is connected with a quantitative water adding instrument through a pipeline.

Preferably, the sampling assembly further comprises a second air duct vertically inserted into the upper cover plug, the upper end of the second air duct is located outside the upper cover of the dryer, and the lower end of the second air duct is located in the dryer body and used for conducting air inside and outside the dryer body; and a fourth regulating valve is also arranged at the upper end of the second air duct. When sampling, open the second air duct, can make the inside and outside atmospheric pressure of desicator body steady, be convenient for sample. The pipe diameter of the second air duct is smaller, and a capillary tube can be adopted.

When in use, the first regulating valve is regulated, so that water can be conveniently added into the water container, and the water can be pumped for sampling; air can be extracted and sampled by adjusting the second adjusting valve; the solution sample or the gas sample can be determined to be collected by adjusting the third adjusting valve; the opening or closing of the second air duct can be controlled by adjusting the fourth adjusting valve.

Furthermore, a standard liquid vessel is arranged in the dryer body and used for placing formaldehyde standard liquid for comparison and detection.

Further, the structure of the sample holder is preferably as follows: comprises a base, an object stage and at least two clamping blocks; the object stage is arranged on the base; the clamping blocks are arranged above the object stage, and the clamping blocks can move relatively close to or away from each other.

Preferably, a bump is arranged on the base, and the object stage is arranged on the bump; a groove is also formed in the outer side of the objective table on the base; the clamping block is connected with a supporting block; the bottom of the supporting block is arranged in the groove and can slide along the groove; and a spring is also connected between the supporting block and the lug. Preferably, the spring is arranged below the objective table, a spring groove is arranged below the objective table, a guide pillar horizontally arranged is arranged in the spring groove, and the spring is arranged in the spring groove and sleeved on the periphery of the guide pillar. In a normal state, the supporting block is positioned on one side close to the objective table, the clamping blocks are positioned above the objective table, the distance between the clamping blocks is short, and even the clamping blocks are contacted with each other; when the device is used, the supporting block is pulled towards the direction far away from the objective table along the groove, the detected object is placed between the clamping blocks, and the clamping blocks clamp the detected object under the action of the elastic force of the spring.

Preferably, in order to reduce the shielding of the clamper on the detected object and ensure the smooth airflow around the detected object, a plurality of object stage through holes are arranged on the object stage; the surface of the objective table is a wave-shaped cambered surface; the surface of the clamping block, which is contacted with the detected object, is also in a wave-shaped cambered surface.

Preferably, the base is further provided with a support leg below, so that the base of the sample holder is separated from the partition plate, and the through hole of the partition plate is prevented from being blocked.

The technical advantages of the utility model are as follows: (1) the sampling structure of the dryer type formaldehyde detection device is improved, and quantitative sampling can be completed through simple and convenient operation; the detection data deviation caused by sampling operation errors is avoided; (2) the improvement of the sampling structure also facilitates the operation of solution sampling and gas sampling, and does not need to replace too many test accessories due to different test conditions; (3) the structure of the sample holder is improved, so that the sample is conveniently and stably held, and the release of the sample formaldehyde is not hindered. In conclusion, the product is beneficial to more accurately obtaining the formaldehyde removal rate data of the sample, and reduces the deviation of the detection data caused by detection equipment and operation.

Drawings

FIG. 1 is a schematic view of the entire structure of the embodiment;

FIG. 2 is a schematic view of a portion A of FIG. 1;

fig. 3 is a schematic structural view of a sample holder of an embodiment.

Reference numerals: 1-a dryer body; 11-an upper cavity; 12-a lower cavity; 2-upper cover of dryer; 21-upper cover through hole; 22-upper cover plug; 3-a separator; 31-a spacer through hole; 4-water container; 5-a sample holder; 501-base; 502-stage; 503-clamping block; 504-bumps; 505-a support block; 506-a groove; 507-a spring; 508-stage through hole; 601-aqueduct; 602-a first airway tube; 603-a second airway tube; 604-a first regulating valve; 605-a second regulating valve; 606-a third regulating valve; 607-fourth regulating valve; 608-a first sampling tube; 609-a second sampling tube; 610-a third sampling tube; 611-sample bottle; 612-a sampler; 613-quantitative watering instrument; 7-standard solution dish.

Detailed Description

The present invention is not limited to the specific embodiments, and technical structures having the same or similar functions to those of the present invention obtained by other equivalent technical means or equivalent substitutions are also within the scope of the present invention.

As shown in fig. 1 and 2, a dryer-type formaldehyde removal rate detection device comprises a dryer body 1, a dryer upper cover 2, a partition plate 3, a water container 4, a sample holder 5, a sampling assembly and a standard solution container 7.

The upper cover 2 of the dryer is covered on the upper part of the dryer body 1. The partition 3 is located in the dryer body 1 and divides the dryer body 1 into an upper chamber 11 and a lower chamber 12. The partition plate 3 is provided with a plurality of partition plate through holes 31, and the upper cavity 11 and the lower cavity 12 are communicated with water and gas through the partition plate through holes 31.

The water container 4 and the standard liquid container 7 are both open containers. The water vessel 4 is placed in the lower cavity 12.

The sample holder 5 is disposed in the upper chamber 11 for fixing the object to be detected.

The upper cover 2 of the dryer is also provided with an upper cover through hole 21, and an upper cover plug 22 is arranged in the upper cover through hole 21. The upper cap plug 22 is tightly fitted into the upper cap through hole 21. The covering contact surface of the upper cover 2 of the dryer and the body 1 of the dryer is a frosted surface.

As shown in fig. 2, a sampling assembly is inserted into the upper cap plug 22. The sampling assembly includes: a water introduction tube 601, a first air guide tube 602, a second air guide tube 603, a sample bottle 611, and a sampler 612 vertically inserted in the upper cap plug 21.

The upper end of the water guide pipe 601 is positioned above the dryer upper cover 2, and the lower end of the water guide pipe 601 is positioned in the water container 4. A first regulating valve 604 is arranged at the upper end of the water guide pipe 601, and the first regulating valve 604 is a three-way valve; one end of the first regulating valve 604 is connected to the upper end of the water conduit 601, one end is connected to a first sampling pipe 608, and the other end is connected to a quantitative water adding instrument 613 through a pipeline.

The upper end of the first air duct 602 is located above the upper cover 2 of the dryer, and the lower end of the first air duct 602 is located in the upper chamber 11 of the dryer body 1. The upper end of the first gas duct 602 is connected to a second sampling tube 609 via a second regulating valve 605.

The upper end of the second air duct 603 is located above the upper cover 2 of the dryer, and the lower end of the second air duct 603 is located in the upper cavity 11 of the dryer body 1. The upper end of the second air duct 603 is further provided with a fourth regulating valve 607. The second air duct 603 has a small tube diameter and is a capillary tube. The second air duct 603 can be used as a balance air duct, so that the air pressure inside and outside the dryer body 1 is stable during sampling, and the sampling is convenient.

The first sampling tube 608 and the second sampling tube 609 are connected to a third sampling tube 610, and are connected to a sample bottle 611 through the third sampling tube 610. The input end of the sample bottle 611 is connected with the third sampling tube 610, and the output end of the sample bottle 611 is connected with the sampling instrument 612. A suction pump is provided within the sampler 612. A third regulating valve 606 is arranged at the junction of the first sampling pipe 608 and the second sampling pipe 609; the third regulator valve 606 is a three-way valve. One end of the third regulating valve 606 is connected to the first sampling tube 608, one end is connected to the second sampling tube 609, and one end is connected to the third sampling tube 610.

As shown in fig. 3, the structure of the sample holder 5 is as follows: comprising a base 501, an object table 502 and two clamping blocks 503. The base 501 is provided with a bump 504, and the stage 502 is disposed on the bump 504 and spaced apart from the base 501. The base 501 has a groove 506 on the outer side of the stage 502, and the groove 506 extends radially outward of the stage 502. One end of a supporting block 505 is connected to one side of the clamping block 503, the supporting block 505 is vertically disposed on the base 501, and the other end of the supporting block 505 is disposed in the groove 506. The clamping blocks 503 are located above the stage 502 and can slide along the groove direction with the supporting block 505, so that the two clamping blocks 503 can move relatively close to or away from each other. A spring groove is arranged below the objective table 502, a guide pillar horizontally arranged is arranged in the spring groove, and a spring is sleeved on the periphery of the guide pillar. One end of the spring 507 is connected to the supporting block 505 and the other end is connected to the protrusion 504. The stage 502 has a plurality of stage through holes 508. The surface of the object stage 502 is a wave-shaped cambered surface; the surface of the clamping block 503 contacting the detected object is also in a wave-shaped arc surface. A support leg is also arranged below the base 501.

Under normal conditions, the supporting block 505 is located at one side close to the object stage 502, and at this time, the clamping block 503 is located above the object stage 502, and the distance between the two clamping blocks 503 is short; in use, the supporting block 505 is pulled along the groove 506 in a direction away from the object stage 502, the object to be detected is placed between the clamping blocks 503, and the clamping blocks 503 clamp the object to be detected under the action of the elastic force of the springs 507.

Using formaldehyde aqueous solution as a detection sample: fixing an object to be detected by using a sample holder 5, covering an upper cover 2 of the dryer, opening a first adjusting valve 604, adding quantitative water into a water container 4 through a quantitative water adding instrument 613, and then adjusting each adjusting valve to be in a closed state; after releasing for a certain time, the first regulating valve 604, the third regulating valve 606, the fourth regulating valve 607 and the sampling instrument 612 are opened, and the water with formaldehyde dissolved in the water containing vessel 4 is pumped into the sample bottle 611 through the water guide pipe 601 for detection.

Or, formaldehyde gas is used as a detection sample: under the condition that water is not added into the water container 4, fixing the object to be detected in the sample holder 5, covering the upper cover 2 of the dryer, and adjusting each adjusting valve to be in a closed state; after releasing for a certain time, the second regulating valve 605, the third regulating valve 606, the fourth regulating valve 607 and the sampling instrument 612 are opened, the gas in the dryer body 1 is extracted to the sample bottle 611 through the first gas guide pipe 602, and the sample bottle 611 can be pre-filled with solution for detection.

When a contrast test is carried out, standard formaldehyde standard solution can be added into the standard solution vessel 7, and a to-be-detected object is not placed, so that the contrast test can be carried out under the same conditions and operation.

Claims

1. A dryer type formaldehyde removal rate detection device comprises a dryer body, a dryer upper cover, a partition plate, a water container and a sample holder; the dryer upper cover covers the dryer body; the partition plate is positioned in the dryer body and divides the dryer body into an upper cavity and a lower cavity; the partition plate is provided with a plurality of partition plate through holes, and the upper cavity and the lower cavity are communicated with each other through the partition plate through holes in a water-gas mode; the water container is an open container and is arranged in the lower cavity; the sample holder is arranged in the upper cavity and is used for fixing an object to be detected; the upper cover of the dryer is also provided with an upper cover through hole; an upper cover plug is arranged in the upper cover through hole and is tightly embedded into the upper cover through hole;

the method is characterized in that: the upper cover plug is inserted with a sampling component; the sampling assembly comprises a water guide pipe and a first air guide pipe which are vertically inserted in the upper cover plug; the upper end of the water guide pipe is positioned outside the upper cover of the dryer, and the lower end of the water guide pipe is positioned in the water container; the water guide pipe is used for guiding the liquid in the water containing vessel; the upper end of the first air duct is positioned outside the upper cover of the dryer, and the lower end of the first air duct is positioned in the dryer body; the first gas guide pipe is used for guiding out gas in the dryer body; the upper end of the water guide pipe is provided with a first regulating valve; and a second regulating valve is arranged at the upper end of the first air duct.

2. The dryer-type formaldehyde removal rate detection device according to claim 1, wherein: the sampling assembly further comprises a sample bottle and a sampler; the upper end of the water guide pipe and the upper end of the first air guide pipe are respectively connected with the input end of a sample bottle through pipelines, and the output end of the sample bottle is connected with the sampling instrument; and a suction pump is arranged in the sampler.

3. The drier-type formaldehyde removal rate detecting apparatus as recited in claim 1 or 2, wherein: the upper end of the water guide pipe is connected with a first sampling pipe, the upper end of the first air guide pipe is connected with a second sampling pipe, the first sampling pipe and the second sampling pipe are communicated and connected with a third sampling pipe, and a sample bottle is further connected through the third sampling pipe; the input end of the sample bottle is connected with the third sampling pipe, and the output end of the sample bottle is connected with a sampling instrument; a suction pump is arranged in the sampler; a third regulating valve is arranged at the junction of the first sampling pipe and the second sampling pipe; the third regulating valve is a three-way valve.

4. The drier-type formaldehyde removal rate detecting apparatus as recited in claim 3, wherein: the first regulating valve is a three-way valve; one end of the first regulating valve is connected with the upper end of the water guide pipe, one end of the first regulating valve is connected with the first sampling pipe, and one end of the first regulating valve is connected with a quantitative water adding instrument through a pipeline.

5. The dryer-type formaldehyde removal rate detection device according to claim 1, wherein: the sampling assembly further comprises a second air duct which is vertically inserted into the upper cover plug, the upper end of the second air duct is positioned outside the upper cover of the dryer, and the lower end of the second air duct is positioned in the dryer body and used for communicating the air inside the dryer body with the air outside the dryer body; and a fourth regulating valve is also arranged at the upper end of the second air duct.

6. The dryer-type formaldehyde removal rate detection device according to claim 1, wherein: the sample holder comprises a base, an object stage and at least two holding blocks; the object stage is arranged on the base; the clamping blocks are arranged above the object stage, and the clamping blocks can move relatively close to or away from each other.

7. The dryer-type formaldehyde removal rate detection device according to claim 6, wherein: the base is provided with a convex block, and the objective table is arranged on the convex block; a groove is also formed in the outer side of the objective table on the base; the clamping block is connected with a supporting block; the bottom of the supporting block is arranged in the groove and can slide along the groove; and a spring is also connected between the supporting block and the lug.

8. The dryer-type formaldehyde removal rate detection device according to claim 6, wherein: the object stage is provided with a plurality of object stage through holes.

9. The dryer-type formaldehyde removal rate detection device according to claim 6, wherein: the surface of the objective table is a wave-shaped cambered surface.

10. The dryer-type formaldehyde removal rate detection device according to claim 6, wherein: the surface of the clamping block, which is contacted with the detected object, is a wave-shaped cambered surface.