Previous situation review: Detailed explanation of laboratory furniture configuration of modern analysis laboratory construction (part 1)

Detailed explanation of laboratory furniture configuration for modern analysis laboratory construction (part 2)

The composition of a chemistry experiment platform mainly consists of the following parts:

(1) Pipeline channels, pipeline racks and pipeline boxes. The pipeline service facilities on the experimental platform are usually introduced from below the ground or from a pipeline well into the pipeline channel in the middle of the experimental platform, and then lead out of the platform for use. The width of the pipeline channel is usually 300-400mm, and the test bench against the wall is 200mm. If part of the units of the test bench cannot be removed entirely for pipeline maintenance in the test bench, the rear wall of the vessel cabinet should be made into a removable structure. Pipeline outlets and power sockets are usually led directly to the countertop. The power socket can be installed on the pipeline rack, pipeline box or medicine rack.

(2) Medicine rack. The width of the medicine rack should not be too wide, and it is advisable to have two medium-sized reagent bottles (500mL) side by side. The usual width is 200-300mm, and the medicine rack against the wall should be 200mm. The medicine rack is usually divided into two layers of wood. The lower layer is left empty for the transfer of items between the drip basin and the two-sided test bench. The upper layer can be equipped with glass sliding doors on both sides or not. The edge of the shelf should be provided with a small flange to prevent the reagent bottle from being pushed off by the opposite experimenter. If the medicine rack is made of metal pipe, the shelf can be lead wire glass or plastic board. The medicine rack sometimes needs to be used for more complicated experimental devices, so the structure of the medicine rack must be made stronger. The upper edge of the medicine rack is sometimes equipped with a fluorescent lamp, which is helpful for the experimenter to see the scale on the glass instrument.

(3) The container cabinet under the experimental platform. The space under the experimental platform is usually equipped with a container cabinet and a knee-extension recess, which can hold experimental supplies and consider the need for the experimenter to sit by the experimental platform and record. Sometimes according to the needs of the experiment, part of the container cabinet can be designed as a drying box with fins or use the under-counter space to place small vacuum pumps or small compressors that may be out of date.

The combination unit of the utensil cabinet separated from the countertop has greater flexibility than the integral combined experiment bench. The combination of the utensil cabinet under the counter can be selected according to the needs and usage habits of each experimenter. After the components are placed in place, the entire countertop is directly placed on each component. Such a countertop may have few or no seams, so this combination method is ideal. It is not only conducive to the factoryization of production, is conducive to improving the progress of design and construction, but also the most adaptable to future changes in the laboratory layout, that is, it has great flexibility.

Each side of the experimental platform can leave one or two knee extension recesses under the platform as required. The width of the recess is 600～1100mm. If the width exceeds this width, the span of the platform is too large. The middle pillar. The height of the knee extension notch can be 800mm (850mm high test bench) to match a 625mm high test bench. In order to consider the standing of the experimenter, the skirting part of the container cabinet must be retracted by about 40mm to form a kicking recess. The height of the skirting can be considered 100～120mm. If you need to consider preventing the ground water containing liquid medicine from flowing into the bottom of the utensil cabinet, you can turn the floor anti-corrosion coil up and attach it to the skirting, or the utensil cabinet components are not used for the skirting. Put another brick and kick on the ground.

In addition, such components can also be applied to experimental benches with mixed structures. Each small component can be pushed directly under the stage, or there are small wheels under the small component. Therefore, the small cabinet can be flexibly suspended under the steel support of the laboratory bench, 250mm above the ground. This is not only convenient for floor cleaning, and its appearance is also lighter, but its storage volume is correspondingly smaller than that of the floor-standing type.

(4) Drainage equipment of the experimental bench. Experimental bench drainage equipment usually includes sinks, countertop drip basins and countertop drainage troughs. Wash basins are often made of ceramic products and are located at both ends of the experimental bench. The sink can be installed on a cantilever or floor stand, and its height is usually 50mm or less lower than the countertop. In order to make the end of the experimental bench more tidy, there are also article cabinet units with water basins at the end. When considering the construction of teaching laboratories, in order to make up for the lack of peninsula-style experimental bench wash basins, there are also 2 sets at the end of the experimental bench. A washing basin, or a washing basin in the middle, but not as ideal as the end, because the water is easy to splash on the table during washing, and it also hinders the long research experimental device.

One or two small drip basins should be set up on the test bench according to the length of the test bench, and their location is just above the pipeline channel. The drip basin is mainly used to drain the liquid medicine on the table or the liquid discharged from the experimental device and the faucet on the table. In order to facilitate the washing of the test bench, a long drain groove is also set in the middle of the test bench to introduce water into the sink or directly drain it.

(5) Countertop. The countertops are usually wooden structure or reinforced concrete structure, but they can be made with various surface layers. The countertop should be picked out of the container cabinet below, and small flanges can be arranged around the countertop to prevent the countertop from being flushed or the spillage of the liquid on the countertop; the countertop that is not considered for flushing may not be provided with a flange.

The countertop surface is required to have the advantages of being strong, smooth and seamless, impermeable to liquids, not easy to break, not sensitive to heat or cold, not easy to break glassware and easy to maintain, but you must find materials that can meet all these requirements It is more difficult. Various colors can be used on the countertops, but black is more suitable for general chemical experiments, so that the scales on the glassware are easy to see, and it is not easy to pan-color. For biochemical experiments with bacteria, white seamless countertops should be used.

Wooden countertops. Solid wood countertops are usually used, which have the advantages of warm appearance, easy repair, and glassware that is not easy to break. The disadvantage is that the wood treatment or production method is not proper enough, cracking and warping will occur. The thickness of the countertop should be 32mm, the wood is preferably hemp chestnut, birch, maple, etc. can also be used. The countertop can be treated with traditional lacquer or nigrosine to enhance its corrosion resistance. In addition, corrosion-resistant synthetic resin coatings can also be used. Due to the difficulty in the source of high-quality wood, it is also considered to use a 32mm thick composite board, with wood tendons in the middle, and the surface layer can be made into various applicable synthetic materials.

Cement stone countertops. Cement stone countertops include cement reinforced concrete, terrazzo, marble, natural granite and other inorganic stone decorations. It is mainly used in fixed test benches and has the characteristics of stability, sturdiness, and high temperature resistance. It is generally used for chemical experiment benches with thicker rubber skins, and can also be used for experiment benches on steel supports. The countertops with reinforced concrete structure can also be covered with ceramic tiles. Although ceramic tiles are not resistant to hydrofluoric acid, they have good resistance to other chemicals and solutions. The disadvantage is that glassware is easily broken. Ceramic tiles should be laid with acid-resistant materials.

Steel countertops. Steel countertops generally use stainless steel countertops, and the thickness is generally 1.2mm stainless steel plates. It has good heat resistance and impact resistance, rust prevention and easy removal of contaminants. It has excellent load-bearing capacity and can be installed on a steel pipe frame. This kind of table top is beautiful and durable, suitable for other laboratories besides the construction of chemical laboratories, such as radiochemistry, biochemistry and oil testing, etc., and the price is relatively high.

Synthetic resin countertops. The synthetic resin countertop is made of a high-density, high-molecular modern synthetic resin material, which has good physical properties and chemical resistance. Synthetic resins are mostly melamine formaldehyde resins, epoxy resins, etc., which have been used on benchtops and basins.

Corrosion-resistant physical and chemical board countertop, 1mm corrosion-resistant physical and chemical board, frame and honeycomb structure, resistant to acids, alkalis, strong oxidants, etc., scratch-resistant, abrasion-resistant, high-temperature resistant, and no pores on the surface. It is an environmentally friendly material. Black, white, gray and other colors.

Thin solid physical and chemical board countertop, the surface material is a solid physical and chemical board after 6mm, and its performance is the same as that of the corrosion-resistant physical and chemical board.

Integral solid core physical and chemical board countertops, solid core physical and chemical boards with thicknesses of 12.7mm, 15mm, 20mm, 25mm are processed and trimmed. The surface has no capillary holes and is easy to clean. It is an ideal countertop material with good Acid and alkali corrosion resistance, suitable for clean laboratories.

High-grade decorative board countertop, the surface material is 1mm high-grade decorative board, frame and honeycomb structure, the surface is smooth and uniform, and the colors are black, gray, white, green, etc.