Lightning protection projects and facilities must be installed inside and outside the building to prevent lightning intrusion. However, problems of varying degrees will occur during the actual construction process, including the following situations;
1. Construction not according to drawings
According to regulations, during the construction of buildings, construction should be carried out in strict accordance with the construction drawings that have passed technical review. It is not allowed to add or delete items at will, cut corners, etc. However, during the inspection of the lightning protection device  construction site, it was found that some projects were not carried out according to the design drawings. During construction, the distance between the down conductors set exceeds the design range, and the down conductors are not set at the corners of the building.
2. Irregular welding of lightning protection device
Lightning protection grounding welding of buildings always accompanies the whole process of construction. The quality of welding directly determines the quality of lightning protection projects. In building design, basic steel mesh is often used as the grounding body. In actual inspection, problems existing in it are: Welding, the welding between the main steel bars of the down conductor and the grounding body, and the welding between the main bars of the ground beam, the overlap length often does not meet the specified standards; the specifications of the lap steel bars do not meet the requirements.
3. No reserved points for equipotential connection
The lightning protection effect of a building mainly depends on whether the equipotential connections formed between the non-charged metal objects and the charged metal objects in the building can become a unified whole. Therefore, during the construction process of the building, the equipotential reserve end should be set with enough points at necessary locations as reserves.
4. Failure to install surge protector as required

The settings of surge protectors, low-voltage power distribution grounding forms, shielding measures, installation techniques, and pipeline laying are inconsistent with the standard requirements for lightning protection design. The low-voltage power distribution system introduced into the building should be installed with corresponding surge protectors and floor lighting systems (electrical equipment). Surge protectors should be installed in the power control cabinet. Cable TV, broadband network, and telephone lines in buildings should be equipped with signal arresters when entering the building.

Jinli  is a company integrating R&D, production, and sales. Since its establishment in 2006, it has 18 years of experience in producing surge protectors. The lightning protection department consists of a technical department and a construction department. Among them, there are 10 technicians and 20 construction workers. The construction personnel have been selected and trained at all levels and operate in strict accordance with the construction requirements to avoid appeal issues.

Reducing the working pressure of the air separation equipment can reduce the unit energy consumption of the product. The working pressure of the full low-pressure air separation equipment is close to the working pressure of the lower tower, while the working pressure of the small air separation equipment is much higher than the pressure of the lower tower. The working pressure is low, and the unit cooling capacity generated by expansion is also small. In order to maintain the balance of cooling capacity, it is first required that the unit cooling loss is also small. For large-scale air separation equipment, the unit cooling loss decreases as the unit capacity increases. At the same time, a smaller hot end temperature difference is also selected during design. The unit cooling loss due to incomplete heat exchange is relatively small, which is a good way to reduce the working pressure. Favorable conditions were created.

In addition, the low working pressure requires the expander to have high efficiency so that it can produce a larger cooling capacity under the same pressure difference. As the capacity of the turboexpander increases, the optimal rotation speed decreases and the efficiency increases. Therefore, it is most suitable for large-scale air separation equipment, making it possible to reduce working pressure.

For small air separation equipment, the cooling loss is relatively large. Even if a turbine expander is used, the speed is as high as 105r/min or more, the efficiency is low, and the maintenance and management requirements are very high. In addition, for large-scale air separation equipment, the amount of expansion is small relative to the amount of process air. The expanded and refrigerated air can still participate in distillation and extract oxygen from it. If a small air separation equipment adopts a low-pressure process, because the amount of expansion gas required to generate refrigeration capacity is large and cannot be fully involved in the distillation, the oxygen extraction rate will be very low, and the energy consumption per unit product will still be high. Therefore, the full low-pressure process is most suitable for large and medium-sized air separation plants.

At present, with the adoption of molecular sieve adsorption purification and booster turbine processes, as well as the advancement of plate-fin heat exchanger technology, the minimum capacity of low-pressure air separation equipment has been designed to 340m3/h oxygen production and 800m3/h nitrogen production (KDON -340/800), the exhaust pressure of the air compressor is 0.59MPa.

What is the pressure swing adsorption molecular sieve purification process, and what are its characteristics compared with the temperature swing adsorption purification process?

Molecular sieves have the function of selective adsorption of mixed gases, and their adsorption capacity changes with changes in temperature and pressure. Its adsorption capacity increases at low temperature and high pressure, and decreases at high temperature and low pressure. Temperature swing adsorption (TSA) is based on the principle that molecular sieves adsorb at room temperature and desorb at high temperatures, while pressure swing adsorption (PSA) is based on the principle that molecular sieves adsorb at high pressure and desorb at low pressure.

The so-called pressure swing adsorption molecular sieve purification process is to use the molecular sieve pressure swing adsorption process to remove water, carbon dioxide, and hydrocarbons in the air, eliminating the need for air pre-cooling systems and regeneration heaters, as shown in Figure 15.

Use 1% to 1.5% purified air to regenerate molecular sieves. The general switching cycle is 9 to 14 minutes. There are 2 to 6 adsorbers according to the specifications of the air separation unit. The adsorbent capacity is 4 times that of the TSA adsorbent of similar air separation units. Each adsorbent is The container is equipped with 6 switching valves.

Compared with TSA, the advantages of PSA are:

     1) Simplify the process and eliminate the need for equipment such as air cooling towers, evaporative cooling towers, low-temperature water pumps, and regenerative heaters;

     2) There is no steam consumption required for TSA heating regeneration. For a 60,000m3/h air separation unit, 1,800kg/h of steam (approximately 1,000kW·h/h) can be saved.

Its disadvantages are:

     1) Air switching loss is 1% to 1.5% and consumes 400kW more power;

     2) The switching cycle is short and the switching valve is prone to failure;

     3) It is difficult to completely desorb the regenerated molecular sieve at room temperature, which will affect the adsorption performance of the molecular sieve and bring some harmful gases into the air separation unit, which will have a certain impact on the safety of large-scale air separation units;

     4) The investment is slightly larger.

Beijing Labonce Thermostatic Technology Co., LTD., founded in 2008, Located in Beijing Zhongguancun life science park, committed to research the temperature and humidity technology services, the company production medicine stability test chamber, constant temperature and humidity chamber, high and low temperature test chamber, incubator and saving chamber and other environmental testing equipment, the introduction of Germany advanced technology, adopt the original installation imported high quality parts, stable and reliable performance.It provides products and services to more than 2000 enterprises, and exports equipment to more than 50 countries such as the United States and the United Kingdom.Backed by scientific research institutes, the company gives full play to its talent advantages, and constantly applies the latest results to products. The r&d team led by researchers and thermal engineering doctors is always serious and rigorous.The company has its own standard plant, standard test laboratory and sheet metal processing equipment, and has set up subsidiaries in jiangsu, Shanghai, guangzhou and chengdu, and offices in other provinces. The cause of life and health, only hard work, do not slack!

Medicine stability is hot sale products around Labonce,Many customers replace the order with us, Why they choose Labonce Medicine Stability chamber?Labonce-CGS Medicine Stability Testing Chamber, Adopt imported process design, Choose the original imported high quality parts, Stable and reliable performance. Suitable for GMP certified users.

Advantage as below:

The newly airway system designed achieves uniform of temperature and humidity form different parts inside the chamber; Polyurethane foam technology is adopted, with good heat preservation and moisture retention performance.

The original imported VAISALA humidity sensor with high accuracy, low drift, long life and maintenance free.

The original imported fully enclosed industrial compressor, high efficiency, low noise, ensure the long-term continuous operation of equipment.

The original imported programmable chromatic touch screen controller, sensitive, Small system error, Multi - stage program setting and multi - point accurate calibration function, With three level password.

There is a 25mm diameter test hole on the left side of the box. The inside toughened glass door and the outside door are designed to observe samples and It will not cause the change of temperature and humidity in the box in a short time.Door lock and mobile caster can be locked.

The liner is made of mirror stainless steel 304, no pollution source, easy to clean.

GMP Quality assured dual data acquisition system: Standard needle printer can print the model and serial number of the equipment to meet reach the requirements of data integrity and consistency. SD card storage, can store more than 5 years of electronic text data;Free software,SD card data can be imported into the computer system.

Safety device: Compressor overheat and overpressure overload protection, water shortage protection, dry burning protection system, independent overtemperature protection alarm system;

Alarm system: Sound-light alarm for temperature and humidity deviation, SMS alarm for remote temperature and humidity deviation and power failure.

Power: AC 220V±10% 50HZ；Environment temperature: +5 ～ 35℃；

Temperature Fluctuation：≤ ±0.5℃ ，Temperature Deviation：≤ ±1.0℃；Humidity Deviation：≤ ±3%RH

Automatic vision counting machine can free counting and batch counting for many kind of material.

There are many kinds of vision counting machine manufacturers in the market, good and bad are mixed, what problems should be paid attention to when choosing a counting machine brand and manufacturer?The editor made a summary, hoping to help everyone.

1. Confirm the counting machine principle
Counting machine has many different counting principles, such as weighing counting, photoelectric counting and vision counting. Vision counting has the highest accuracy, using camera recognition counting.

2. Confirm whether the manufacturer has its own core technology
Vision counting machine is largely a customized product, which needs to do some analysis of the physical characteristics of each material, including viscosity, elasticity, dispersion state and so on. The equipment does customized processing, so that the counting accuracy of the product can reach the highest. In addition, some special production requirements, such as the acquisition of label information, ERP connection and other customized software processing. Vision counting machine is the combination of hardware and mechanical structure to make the whole set of equipment to achieve good results.Some manufacturers purchase other systems integrated into their own mechanical structure, this grafting development mode is often difficult to achieve a very good counting effect. To sum up, the good vision counting machine manufacturers have their own hardware and software development team, mechanical structure development team and professional after-sales team.

3. Understand the customer cases that manufacturers have cooperated with
The customer cases that the manufacturer has cooperated with reflect the experience and strength of the manufacturer, especially the cooperation with some well-known companies, which also reflects the level of after-sales service.

4. The product needs to be tested by the counter
Materials need to be tested on the machine, and accurate counting accuracy and speed can be obtained through continuous testing.

The core competitiveness of vision counting machine manufacturers

How to better provide better service for the majority of customers who need vision counting machine solutions, that is to improve their own technical level. Since its establishment, our company has focused on the development of vision counting machines to solve the counting needs of all walks of life.

In order to comply with all walks of life in the market, as well as more and more complex counting needs, our company pays attention to the introduction of talent, constantly promotes technological innovation, dares to be the first, develops a variety of vision counting technology, and solves various counting problems. For example, counting of oily materials, snack food counting, laundry pods counting, damage prevention counting equipment, small material counting, detection & counting two-in-one equipment and so on.

Recently, our company is very honored to obtain the "Hefei Big Data Enterprise Certificate" issued by the Hefei Data Resources Bureau, at the same time, and obtained two new invention patents, namely, "a viscous material feeding and conveying device" and "an efficient counting subcontracting device for granular viscous materials". At this point, our company has obtained a total of more than 20 invention patents, utility model patents and appearance patents in the vision counting machine industry, and a total of about 30 computer software works. Our company has also won the title of Hefei High-tech Zone Eagle and deep technology enterprise for many years.

As a senior vision counting machine manufacturer with rich experience in the industry, our company constantly improves its core competitiveness, and constantly actively seek a breakthrough in counting solutions, serves more enterprises, and makes progress with more enterprises.

Brick making machine is one of the important equipment for brick factory to produce bricks. As the core component of the tpmbrickmachine brick machine, the paving stone mould's lifetime directly affects the quality and production efficiency of the bricks. Therefore, improving mould lifetime is crucial for block factories. This article will introduce some methods to improve concrete block mould lifetime

Firstly, correct usage of paving block mould is the key to extending its lifetime. During use, need to strictly follow the instructions provided by the brick making machine manufacturer to ensure the normal operation of the mold. At the same time, it is necessary to do a good job in the care and maintenance of paver block mould, even if it is necessary to clean the impurities and residues on the surface of the mould to avoid damage to cement block mold.

Secondly, the use of high-quality mould materials is also one of the important factors in extending service life. High-quality mold materials have better wear resistance and corrosion resistance, and can effectively reduce the erosion and friction of the external environment, thereby extending the lifetime of concrete brick mold.

In addition, rationally designing the structure of the mold can also improve its service life. Brick machine manufacturers can design more reasonable and stable mold structures based on different production needs and usage conditions to reduce wear and damage during concrete block making mold reuse.

In addition, regular inspection and maintenance of cement block mould is also one of the important measures to extend the service life. Paving brick factory can regularly inspect paver stone mold and repair or replace damaged parts if problems are found to ensure the normal operation of cement block mould and extend its lifetime

The basic requirement for the finished product "photovoltaic bracket" produced by photovoltaic bracket equipment is that the structure must be firm and reliable, able to resist various external corrosion, loads, and other conditions, and can achieve the simplest installation, minimum maintenance, and the most reliable repair guarantee. Therefore, the basic requirements for a qualified rollformmachinemanufacturers photovoltaic support equipment product are:

1. The material strength is sufficient to withstand the climatic conditions of the installation environment.

2. Its design should meet the needs of use, be able to discharge, and have reasonable configuration wiring.

3. Through reasonable configuration, the entire reasonable support system can be constructed simply and reasonably.

4. Reasonable cost-effectiveness. The formation of a device requires various components and auxiliary components. A reasonable combination to reduce costs and achieve cost-effectiveness is also one of the most basic requirements for a qualified photovoltaic bracket equipment product.

5. Maintenance and repair are crucial, and under harsh conditions, no guarantee can be 100% successful, so maintenance and repair are necessary.

6. Reasonably consider the impact of extreme environments on the product.

If conditions permit, the performance of the product can be tested.

C Purlin Roll Forming Machine For Solar Industry C50-200(Hot Sales)For details, please click to access detailed products

Trapezoidal screw materials:

1.General precision (referring to grade 7~9) Trapezoidal screws, for light loads, are usually made of non-alloy medium carbon structural steel (such as 45, 50 steel), normalized, quenched and tempered, or cold-rolled free-cutting steel (such as Y45MnV) Directly machined. For those with wear resistance requirements, quenched and tempered non-alloy structural steel (such as 45, steel) can be used, and it can be used directly after ammonia carburizing treatment. Screws used for measurement and with little stress can be made of quenched and tempered non-alloy structural steel (such as 45, 40Cr steel), which can be used after induction heating and surface quenching.

2.Precision (referring to level 6 and above) Trapezoidal screws are usually made of non-alloy (carbon) or low-alloy tool steel (such as T10A, T12A or 9Mn2V, CrWMn steel) for light loads, and are quenched and tempered or spheroidized annealed. Screws that work frequently are often made of low-alloy tool steel (such as 9Mn2V, CrWMn steel) and integrally quenched. They can also be made of high-grade nitriding special steel (such as 38CrMoA1A, 35CrMo steel) and undergo infiltration treatment to withstand high temperatures. temperature situation. Small-sized screws that require wear resistance can be made of carburized low-alloy steel (such as steel), and can be used after carburizing + quenching and low-temperature tempering. For screws that work at high temperatures, they can be made of precipitation-hardened stainless steel (such as OCr17Ni4Cu4Nb) and used after solid solution + aging treatment.

After the improvement of the spiral air duct machine produced by our company, the operability of the machine has been greatly improved and the scope of use has been expanded. It is an ideal equipment for making metal thin-walled round tubes. The machine works on the principle of continuous feeding spiral bite. It is an advanced, efficient and high-end round tube processing equipment.

  Compared with similar round tube forming equipment, our machine is flexible and versatile. It can process round tubes with any diameter within the range of Ф100mm-1600mm, and it is easy to adjust. There is no need for a fixed dead mold, the length of the round tube can be freely determined,and the blanking is automatically cut off.

  The machine is controlled by PLC program and operated by a touch screen interface. The host machine has adjustable frequency and stepless speed.The linear motion adopts pneumatic form. The seam pressing adopts gas-liquid pressurization form (the pressing force can be adjusted 6-12Mpa according to the plate thickness). All linear movements Both speed and pressure can be adjusted.