Modular adjustable test stand for formaldehyde emitting environmental chamber

Abstract

The utility model relates to a modular adjustable test frame for formaldehyde release amount environmental cabin in the technical field of environmental detection equipment, and aims to solve the problem of the unadjustable layer height of the traditional test frame, the airflow obstruction, the inconvenience of cleaning and the cross contamination easily caused. The technical scheme main points are: including frame assembly, layer board and height adjusting mechanism, the frame is connected by the angle code through the stand and the crossbeam, the layer board is the grid structure, and the stepless adjustment is realized through the adjusting hole on the stand and the elastic locking mechanism on the layer board. The present application is mainly used for the bearing and test of the sample in the formaldehyde release amount environmental cabin.

Description

Technical Field

[0001] This utility model relates to the technical field of environmental testing equipment, and in particular to a modular adjustable test rack for a formaldehyde emission environmental chamber. Background Technology

[0002] In the control of indoor environmental pollution in civil building projects, testing the formaldehyde emission of materials such as decorative panels is a crucial step in the final acceptance inspection. GB50325-2020, the "Standard for Indoor Environmental Pollution Control of Civil Building Projects," explicitly requires the inspection of pollutant testing reports for relevant materials. This testing is typically conducted in an environmental chamber of specified volume, where samples are placed on test racks within the chamber and tested under the temperature, humidity, air exchange rate, and airflow velocity specified in the standard.

[0003] Currently, the test racks commonly used in environmental chambers have the following main technical defects:

[0004] 1. Fixed structure, not adjustable: Traditional test racks are mostly welded, with fixed layer height and overall dimensions, making them unable to flexibly adapt to the testing needs of samples with different thicknesses and sizes, resulting in poor versatility. When testing non-standard sized samples, it is often necessary to customize a special test rack, increasing costs and the complexity of warehousing management.

[0005] 2. Enclosed structure, affecting airflow organization: Many test racks use solid plates or densely supported shelves, which severely hinders airflow within the environmental chamber. This results in uneven airflow velocity on the sample surface, with localized eddies or dead zones forming, preventing the formaldehyde released from the sample from mixing fully and evenly with the air inside the chamber, ultimately affecting the accuracy and reliability of the test data.

[0006] 3. Difficult to clean and prone to cross-contamination: The integrated welded test frame has many blind spots for cleaning, and formaldehyde molecules adsorbed from the previous test can easily remain at the welds and component connections. If cleaning is not thorough, the residual formaldehyde will be released into subsequent tests, causing cross-contamination of new samples and resulting in seriously distorted test results. In addition, the traditional fixed structure also makes maintenance and component replacement extremely inconvenient.

[0007] Therefore, there is an urgent need for a dedicated test rack that can solve the above problems, achieve height adjustment, optimize airflow, and facilitate thorough cleaning. Utility Model Content

[0008] In view of the shortcomings of the existing technology, this utility model aims to provide a modular adjustable test rack for formaldehyde emission environmental chambers. Its main purpose is to solve the technical problems of traditional test racks, such as non-adjustable layer height, inability to adapt to samples of different sizes, obstruction of airflow in the chamber, inconvenience of cleaning, and easy cross-contamination.

[0009] To achieve the above objectives, this utility model adopts the following technical solution: a modular adjustable test rack for a formaldehyde emission environmental chamber, comprising:

[0010] The frame assembly consists of at least four vertical columns and crossbeams connecting the columns.

[0011] At least one layer is used to support the specimen;

[0012] The height adjustment mechanism includes a plurality of equally spaced adjustment holes disposed on the column, and an elastic locking mechanism disposed on the shelf and adapted to the adjustment holes;

[0013] The elastic locking mechanism is detachably locked into any of the adjustment holes to fix the shelf at different heights on the column;

[0014] The elastic locking mechanism is a spring pin. The pin shaft portion of the spring pin tends to extend outward under the elastic force of the internal spring. By pressing the pressing head that is linked to the pin shaft, the pin shaft can be retracted, thereby unlocking it from the adjustment hole.

[0015] To address the problem that traditional solid or densely packed shelves obstruct airflow within the environmental chamber, leading to uneven wind speeds on the sample surface and affecting test accuracy, this application further specifies that the shelf in the above technical solution includes a rectangular frame and a grid structure fixed within the frame. The grid structure allows airflow to pass freely through its top, bottom, and sides. This highly permeable grid structure ensures uniform airflow penetration, enveloping the sample and structurally guaranteeing the accuracy and reliability of the test data, meeting standard requirements.

[0016] To ensure both smooth airflow and a robust, durable, and easily industrially manufactured shelf structure, this application further specifies that the mesh structure in the above technical solution is a metal wire mesh, which is welded to the rectangular frame. The welding of the metal wire mesh to the frame provides a robust load-bearing surface while maintaining an open structure, thus balancing structural strength and excellent permeability.

[0017] To eliminate cleaning dead zones in integrated welded frames, avoid cross-contamination caused by formaldehyde residue, and address the issue of high overall maintenance and replacement costs, this application further specifies that the frame components in the above technical solution are fully decomposable modular structures, with the columns and beams connected by angle brackets and fasteners. This achieves complete disassembly of the test frame, facilitating thorough cleaning of each component and preventing cross-contamination; it also supports individual component replacement, reducing long-term maintenance costs.

[0018] To ensure that this test rack can be optimally adapted to the working space of the most commonly used 1 cubic meter standard environmental chamber, this application further specifies that, in the above technical solution, the overall dimensions of the test rack are adapted to the internal space of the 1 cubic meter formaldehyde emission environmental chamber. This allows the test rack to achieve optimal space utilization and airflow organization within the 1 cubic meter chamber, representing a typical and optimized application of this universal structure.

[0019] Compared with the prior art, the present invention has the following significant advantages:

[0020] I. Achieve stepless and precise adjustment and quick assembly / disassembly of shelf height: Through the mechanical combination of adjustment holes and spring pins, users can adjust, install, and disassemble the shelf height by hand without any tools. The spring pins can be inserted into the adjustment holes at different positions to achieve precise positioning and firm fixation of the shelf at any height, greatly improving operating efficiency and adaptability to samples of different sizes, and achieving true stepless adjustment.

[0021] II. Optimized airflow organization within the chamber to improve testing accuracy: The shelves employ a high-aperture mesh structure, combined with the open design of the frame itself, minimizing the obstruction of airflow by the solid structure. This allows air within the environmental chamber to freely penetrate the shelves vertically and horizontally, forming a uniform and stable airflow field. This ensures that formaldehyde released from the samples is carried away by the airflow in a timely and uniform manner, guaranteeing the accuracy and reliability of the test data from the source, and fully complying with the relevant testing standards for airflow organization within the chamber.

[0022] Third, it completely eliminates cross-contamination and facilitates maintenance: The fully disassembled modular design, combined with a weld-free and cornerless physical form, allows the test rack to be easily and completely disassembled into individual components such as columns, beams, and shelves. Each component can be individually and thoroughly cleaned, wiped, and even baked at high temperatures, fundamentally eliminating the risk of formaldehyde residue and effectively preventing cross-contamination in the testing room. Furthermore, if a component is damaged, it can be replaced individually without scrapping the entire test rack, significantly reducing long-term maintenance costs. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the modular adjustable test rack of this utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the shelf and the elastic locking mechanism;

[0026] Figure 3 This is a schematic diagram of a modular adjustable test rack placed in an environmental chamber.

[0027] The labels in the diagram are: 1. Column; 2. Beam; 3. Shelf; 4. Adjustment hole; 5. Elastic locking mechanism; 6. Angle code; 7. Environmental chamber; 8. Sample. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] like Figure 1 , Figure 2 and Figure 3 As shown, the modular adjustable test rack for formaldehyde emission environmental chambers of the present invention is suitable for formaldehyde detection of decorative panels and other tests of desiccators that require a vacuum-sealed environment.

[0030] The modular adjustable test frame consists of four aluminum alloy columns 1 and several crossbeams 2 connected by angle brackets 6 and bolts to form a stable rectangular three-dimensional frame. On each column 1, a series of equally spaced circular adjustment holes 4 are drilled along its axial direction at intervals of 25mm.

[0031] The shelf 3 is constructed by fixing 304 stainless steel wire mesh to a rectangular metal frame around its perimeter using an argon arc welding process, forming a mesh structure with a high open area ratio. At each of the four corners of the shelf 3's frame, a spring-loaded locking mechanism 5 is installed; each spring-loaded locking mechanism 5 is a support component with a spring pin.

[0032] During assembly, press the pressing head of the spring pin 5 by hand to retract its pin shaft. Then, place the shelf 3 at the predetermined height, aligning the spring pin 5 with the corresponding adjustment hole 4 on the column 1. After releasing, the spring inside the spring pin 5 automatically pops out and engages with the adjustment hole 4, thus firmly locking the shelf 3 at the predetermined height position. This process requires no tools and is quick and reliable.

[0033] The assembled test frame is placed into the 1 cubic meter environmental chamber 7. The test specimen 8 is placed on the shelf 3. Due to the grid structure of the shelf 3 and the open structure of the frame, after the environmental chamber 7 is started, the airflow inside the chamber can penetrate the grid structure of the shelf 3 without obstruction and flow evenly over the upper and lower surfaces of the test specimen 8, ensuring the consistency and accuracy of the test conditions.

[0034] When cleaning is required after testing, simply press the spring pin 5 again to remove all shelves 3. Then, use a wrench or similar tool to loosen the bolts connecting the angle brackets 6 to completely disassemble the entire test rack into individual parts such as the uprights 1, beams 2, shelves 3, and connectors. These parts can be thoroughly cleaned or treated individually to ensure no formaldehyde residue remains, preparing them for the next test.

[0035] This utility model adopts a combination structure of equally spaced adjustment holes 4 (or adjustment grooves) on the column 1 and elastic locking mechanism 5 on the shelf 3 support, which solves the technical problems of fixed shelf height and inability to adapt to samples of different sizes in traditional welding test racks. It brings the technical effects of stepless height adjustment, quick assembly and disassembly, and structural stability. Specifically, by inserting spring pins into the adjustment holes 4 at different positions, the shelf 3 can be accurately positioned and fixed at any height, realizing true stepless adjustment and strong versatility. No tools are required, and the installation, disassembly, and height adjustment of the shelf 3 can be completed by hand, which greatly improves the efficiency and flexibility of operation. The mechanical locking method ensures that the shelf 3 will not shift due to vibration or collision during the test, ensuring the stability and repeatability of the test. This invention employs an open structure with optimized airflow organization, combining a high-aperture metal mesh panel with an open frame profile. This solves the technical problem of traditional solid or dense panels obstructing airflow within the chamber, leading to uneven wind speed on the sample surface and affecting testing accuracy. It delivers the benefits of smooth airflow, accurate data, and compliance with standards. Specifically, the mesh structure minimizes physical obstructions, allowing air to penetrate freely from top to bottom and left to right, ensuring that sample 8 is enveloped by a uniform airflow field. Structurally, it guarantees the uniformity of key parameters (wind speed, temperature, and humidity) within the environmental chamber, thereby improving the accuracy and reliability of formaldehyde emission test data from the source. The design proactively meets the requirements of the standard for airflow organization within the chamber. This utility model adopts a structure that facilitates cleaning and prevents contamination, namely, a fully decomposable modular structure and a weld-free, dead-angle-free physical form. This solves the technical problem of formaldehyde residue and cross-contamination caused by cleaning dead angles in traditional integrated welded racks, resulting in thorough cleaning and convenient maintenance. Specifically, the entire test rack can be completely disassembled into independent columns, beams, and shelves. Each component can be individually and thoroughly cleaned or baked at high temperatures, eliminating residual contamination. This simplifies the maintenance process and reduces long-term operating costs. If a component is damaged, it can be replaced individually without scrapping the entire rack.

[0036] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A modular adjustable test rack for a formaldehyde emission environmental chamber, characterized in that, include: The frame assembly consists of at least four vertical columns (1) and crossbeams (2) connecting the columns (1); At least one layer (3) is used to support the specimen (8); The height adjustment mechanism includes a plurality of equally spaced adjustment holes (4) provided on the column (1), and an elastic locking mechanism (5) provided on the shelf (3) and adapted to the adjustment holes (4); The elastic locking mechanism (5) is detachably locked in any of the adjustment holes (4) to fix the shelf (3) at different heights on the column (1); The elastic locking mechanism (5) is a spring pin. The pin shaft part of the spring pin tends to extend outward under the elastic force of the internal spring. By pressing the pressing head that is linked with the pin shaft, the pin shaft can be retracted, thereby unlocking the adjustment hole (4).

2. The modular adjustable test rack for formaldehyde emission environmental chambers as described in claim 1, characterized in that, The shelf (3) includes a rectangular frame and a grid structure fixed within the frame, the grid structure allowing airflow to pass freely above, below and around it.

3. The modular adjustable test rack for formaldehyde emission environmental chambers as described in claim 2, characterized in that, The mesh structure is a metal wire mesh, which is fixed to the rectangular frame by welding.

4. The modular adjustable test rack for formaldehyde emission environmental chambers as described in claim 1, characterized in that, The frame components are a fully decomposable modular structure, and the columns (1) and beams (2) are connected by corner brackets (6) and fasteners.

5. The modular adjustable test rack for a formaldehyde emission environmental chamber as described in any one of claims 1-4, characterized in that, The overall dimensions of the test rack are compatible with the internal space of the 1 cubic meter formaldehyde emission environmental chamber (7).

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