The plant growth light is a special kind of lamp used on the plant growth rack. According to the law of plant growth, sunlight must be required, and the plant growth light is a lamp that uses the principle of sunlight to replace sunlight for the growth and development environment of plants. .

Basic information

Name: Grow Light, the light replaces sunlight for the growth and development of plants

Function: Promote growth, prolong flowering period, and improve quality. After application testing, the wavelength of plant light is very suitable for plant growth, flowering and fruiting. Generally, indoor plants and flowers will grow worse and worse with time. The main reason is the lack of light. Irradiation, irradiated by LED lights suitable for the spectrum required by plants, can not only promote their growth, but also prolong the flowering period and improve the quality of flowers.

The application of this high-efficiency light source system to agricultural production such as greenhouses and greenhouses can, on the one hand, solve the drawbacks of the lack of sunlight leading to the decrease in the taste of greenhouse vegetables such as tomatoes and cucumbers. It will be listed before and after the Spring Festival, so as to achieve the purpose of off-season cultivation.

1. As a supplementary light, the light can be enhanced at any time of the day, which can prolong the effective lighting time.

2. Whether at dusk or at night, it can effectively extend and scientifically control the light required by plants.

3. In the greenhouse or plant laboratory, it can completely replace natural light and promote plant growth.

4. Completely solve the situation of watching the sky and eat in the seedling stage, and arrange the time reasonably according to the delivery date of the seedlings.

The significance of greenhouse lighting

The growth rate of plants depends on the light intensity, that is, the amount of light radiant energy absorbed by the surface of the plant, not on the number of light sources.

The significance of lighting inside the greenhouse is to extend enough light intensity throughout the day. Mainly used for growing vegetables, roses and even chrysanthemum seedlings in late autumn and winter. Greenhouse lighting has a huge impact on the growth period and seedling quality. Usually, for tomatoes, light will start after the plant seedlings grow two cotyledons. Continuous light for 12 days can reduce the seedling preparation period by 6-8 days. But more than 24 hours of light will cause plant growth disorder.

For more details click to visit:https://www.etegreen.com/blog/plant-growth-lights/

The square bottom valve bag making machine can be used to make valve pockets of various materials such as paper valve pockets, plastic woven heat sealing valve pockets, multi-layer kraft paper bag making machines, etc. The gluing process is used for bonding to present a square shape. The heat sealing process and principle of the square bottom valve bag making machine.

Heat sealing process and principle of square bottom valve bag making machine

HT120-IA Paper Tube Machine

1. Heat sealing knife gap

The gap of the heat-sealing knife refers to the pressure interval from which the predetermined heat-sealing pressure is transmitted to the heat-sealing surface when the upper heat-sealing knife contacts the bottom plate. Usually the gap of the heat sealing knife is set at 1.0 ~ 1.5mm, which is related to the bag making speed, film thickness, transfer function, etc. At the same film thickness and the same heat sealing speed, the heat sealing time of the heat sealing knife is relatively small, and the heat sealing strength of the product will decrease.

2. Heat sealing times

General heat sealing usually requires more than 2 times of heat sealing. After the bottom of the square bottom valve pocket is formed, there are generally at most eight layers. Usually, there are 5 sets of transverse heat sealing equipment for the square bottom valve pocket. Ultrasonic welding is used for heat sealing of zippers. Nice bag. The heat sealing strength is not easy to form in the center of the base material, and it is easy to cause a root break phenomenon if it is heat sealed too many times.

For more details click to visit:https://www.lyhuatianm.com/products-information/heat-sealing-process-of-square-bottom-valve-bag-making-machine.html

The most important function of packaging is to protect the quality of all packaged goods, that is, to ensure that the goods will not be damaged, lost, leaked and spoiled.

This requires that the seal must have a certain strength and sealing performance in the process of bag making, and can withstand the pressure of a certain weight of content to ensure that the product does not crack or leak during the circulation process, so as to achieve the purpose of protecting the product. And bag making is the last production process before delivery to users, and quality control is more important.

Material selection

HT120-IA Paper Tube Machine

Surface material

Most of the non-heat-sealable materials are used, and materials with good heat resistance and small thermal deformation should be considered, such as BOPA, BOPET, BOPP, paper, etc.

Inner material

That is, the heat-sealable material can be heat-sealed at a temperature 30°C lower than the heat-deformation temperature of the surface-layer material. If the temperature is low, the sealing fastness is poor and cannot meet the requirements. In order to improve the sealing fastness, the temperature is raised. Because the thermal deformation temperature difference between the inner and outer layers is too small, the surface material is easily scalded.

For the same heat-sealing material, its heat-sealing strength will increase as the thickness of the heat-sealing material increases. Therefore, the inner layer material of the back sealing bag and the stand-up bag should be more than 30μm thick. If the inner layer material is too thin, it will affect the sealing of the finished bag.

Zipper

For more details click to visit:https://www.lyhuatianm.com/products-information/summary-of-basic-skills-of-bag-making-mechanism-bag.html

In recent years, with the continuous development of my country’s calcium hydroxide market, the technical indicators of calcium hydroxide products are also constantly improving. The traditional calcium hydroxide production process and the inability to meet market demand and technical indicators have been gradually replaced by calcium hydroxide equipment. Everyone has a lot of doubts about calcium hydroxide equipment. Many people are curious about the difference between calcium hydroxide equipment and traditional production processes? Next, I will introduce you to it.

THE DIFFERENCE BETWEEN CALCIUM HYDROXIDE EQUIPMENT AND TRADITIONAL PRODUCTION PROCESS

GFEX Case

1. PRODUCTION PROCESS

The calcium hydroxide that can be mechanized and produced on a large scale using calcium hydroxide equipment has a much higher product quality than hand-produced products. At the same time, the equipment also realizes automatic control and online real-time monitoring. The entire production line only needs 2 to 3 employees, which saves human resources.

The traditional production process is mainly manual, and the product quality is not very good. It is mainly used in low-end markets such as sewage treatment, ash calcium, and putty powder.

2. CALCIUM HYDROXIDE PRODUCTION

The production of calcium hydroxide equipment can realize large-scale production of calcium hydroxide. The output of a single machine ranges from 3T/h to 20T/h, and different schemes can be completed according to the requirements of users.

The traditional production process is inefficient, and each person does not exceed 1 ton of finished calcium hydroxide during the day. Such production capacity cannot meet the large demand for calcium hydroxide in various industries such as power plant desulfurization, fine chemical industry, pharmaceutical food, petroleum, and paper making.

For more details click to visit:https://www.ly-gaifeng.com/blog/the-difference-between-calcium-hydroxide-equipment-and-traditional-production-process.html

Users who purchase calcium hydroxide equipment production lines usually consult in detail about what standard the calcium hydroxide produced by calcium hydroxide equipment can meet, and purchase corresponding supporting production lines according to their own goals.

At present, the calcium hydroxide powder produced by domestic calcium hydroxide equipment can reach industrial grade use, the fineness is generally 200-400 mesh, and the content is generally 65%-93%. construction and other industries.

The fineness of calcium hydroxide equipment can reach about 325 mesh, and it can produce 6-20 tons of finished calcium hydroxide per hour. If it is produced in 24 hours, it can produce up to 480 tons of calcium hydroxide powder a day, which can meet the high standard requirements of users.

HOW TO ENSURE THE POWDER FINENESS OF CALCIUM HYDROXIDE EQUIPMENT?

For the performance of calcium hydroxide equipment, powder fineness is undoubtedly a very important measure. Users all hope that the purchased equipment can achieve stable powder fineness and ensure powder quality. From the following two aspects to ensure that users buy Equipment to the desired effect and standard.

1. The matching powder selection device is very important. Its main function is to classify and screen the powder processed by the calcium hydroxide equipment, and select qualified finished products. Therefore, for the calcium hydroxide production line, choose the selection that is suitable for your own production line requirements. The size of the powder machine becomes very important.

For more details click to visit:https://www.ly-gaifeng.com/blog/fineness-adjustment-of-calcium-hydroxide-equipment.html

There are many kinds of desk and chair sets on the market, the price difference is large, and the quality is also uneven. If you choose cheap ones, the quality cannot be guaranteed. There are many factors that affect the quality. If you want to buy good quality products , we must first understand the factors that affect the quality of desk and chair sets.

Process factors affecting the quality of desk and chair sets

High Quality School Table with Chair

1. Welding wheel diameter

The diameter of the welding wheel determines the diameter of the nugget. As the new welding wheel is ground again and again, the diameter gradually becomes smaller, the contact area between the desk and chair and the steel strip is reduced, the current density is increased, and the pressure on the welding point is increased. Also added, so the diameter of the welding wheel cannot be too small.

2. Welding current

The influence of the welding current of desks and chairs on the heat is a quadratic relationship. As an adjustable parameter, it can be selected according to the thickness of the welded steel strip. The factors that affect the actual current change are the fluctuation of the power supply voltage and the resistance of the secondary circuit. In order to ensure that desks and chairs are not affected by external conditions, it is necessary to adopt a constant current control system.

For more details click to visit:https://www.aoyangschoolfurniture.com/aoyang-news/factors-affecting-the-quality-of-desk-and-chair-sets.html

For students, they naturally hope to use new desks and chairs, but such frequent replacement of new desks and chairs will increase financial expenditures for schools. Besides, steel and wood desks and chairs are of reliable quality and long service life. Longer, regular maintenance can avoid the waste caused by repurchasing new desks and chairs. Therefore, schools should pay attention to the maintenance and maintenance of desks and chairs.

First of all, desks and chairs are generally used in teaching places, and students are the main body of use. Schools should warn students to take care of public property and their own desks and chairs. It is forbidden to scribble on desks and chairs, or even scratch them with sharp objects. , causing permanent scars. The desks and chairs should be handled with care, and violent behaviors, such as smashing and smashing, should be prohibited.

In addition, to stop desk culture, it is not advisable to write poems and draw pictures on desks and chairs. Therefore, it is necessary to build bricks from the overall quality of students and school education.

At present, the design of student desks and chairs needs to consider many factors. The designed and produced student desks and chairs must meet the most basic three performances, and such student desks and chairs can be qualified.

High Quality School Table with Chair

1. Practical performance

This is the primary condition for the design of desks and chairs. The design of student desks and chairs must meet his direct use and meet the needs of students. This is the most basic. If the needs of students cannot be met, no matter how beautiful the appearance is Just empty shelves, meaningless.

2. Comfortable performance

This is the demand for high-quality life now. The comfort of student desks and chairs is also a reflection of the value of desks and chairs. The designed student desks and chairs must conform to ergonomics, and can also have detailed observation and analysis of life. In order to design comfortable products.

For more details click to visit:https://www.aoyangschoolfurniture.com/aoyang-news/school-desks-and-chairs-maintenance.html

The slewing bearing is an important “joint” of the crane, so its maintenance is very important. So how to maintain the slewing bearing of the crane?

When carrying out maintenance work on the slewing bearing of the crane, first of all, pay attention to the danger of being dragged into the slewing pinion, crushing and shearing. When performing the following tasks, make sure that no maintenance personnel are in the main boom, the danger zone between the boarding car and the reel, or between the disembarking and reel, when the engine is started to perform the necessary slewing and luffing operations. Hazardous areas, except for the crane operator (in the cab).

Check the bolts of the slewing bearing

slewing bearing of the crane

1. Before each crane operation or at least once a week, visually check the bolts on the slewing bearing;

2. After the slewing bearing works for 100 working hours, check whether the bolts are loose, and check again at the 300th working hour; after that, check every 500 working hours; the inspection interval should be shortened under severe working conditions. If the bolts are found to be loose during the inspection, please stop the construction operation, and immediately contact the local after-sales service department. The factory or professional technicians will check and decide whether to disassemble and inspect immediately;

3. Fill the slewing bearing with lithium-based grease before installation;

4. When replacing the bolts, wipe the bolts clean, apply thread tightening glue, and then tighten them; use the crane according to the requirements of the operation manual and the lifting performance table, or check the tightening bolts regularly as required, so as to avoid the fatigue damage of the bolts;

Routine inspection of slewing bearing

1. Regularly check the flexibility of the rotation; if noise and impact are found, it should be stopped immediately for inspection, troubleshooting, and dismantling and inspection if necessary;

For more details click to visit:https://www.excavatorbearing.com/a/bearing-knowledge/crane-slewing-bearing-maintenance.html

The slewing bearing is an indispensable part of the excavator slewing device. Whether the excavator can turn left or right during work is inseparable from the credit of the slewing bearing. The slewing bearing is mainly used to support the quality of the upper body and bear the working load. Due to the heavy load operation of time and the influence of the environment, the phenomenon of inflexible operation will appear after a long time, which will cause a lot of trouble when we use it, and there is no way to work well.

Reasons for inflexible operation of excavator slewing bearing

Reason 1: The slewing bearing gear is deformed or broken, causing jamming or inflexible movement.

Solution: Repair the gear, re-weld the gear.

Reason 2: There is a problem with the sealing system of the slewing bearing, which will enter debris, such as stones, sand, etc., resulting in stuck or insensitive movement.

Solution: Clean up all the debris.

Reason 3: The newly purchased product is inflexible in idling. Check the production date of the slewing bearing. If the time is long and the climate is cold, it may be mixed with salt mist in the raceway, which will cause the rotation resistance to multiply and make the slewing bearing run poorly.

Remedy: If it can run after afterburning and there is no other abnormality, it can be used normally.

Reason 4: overload operation, resulting in inflexible movement of the slewing bearing.

Corresponding solution: The workload needs to be reduced.

Reason 5: The position of the slewing bearing is not flat.

Solution: Need to change the platform position and work in a flat position.

For more details click to visit:https://www.excavatorbearing.com/a/bearing-knowledge/excavator-slewing-bearing-is-inflexible.html

All machines will experience wear and tear after a long period of use. When the parts exceed the service life or are damaged beyond repair, they should be scrapped and replaced. The tower crane slewing bearing is prone to failure and damage in the long-term outdoor harsh environment and high-load operation, so to what extent does it meet the scrapping standard of the tower crane slewing bearing?

Scrap standard of tower crane slewing bearing

slewing bearing

1. Slewing bearing raceway ring and rolling element wear and scrap

The wear of raceway rings and rolling elements is one of the common forms of scrapped slewing bearings. When there is raceway pitting on the surface of the slewing bearing, surface metal peeling and overall wear, abnormal noise, rolling element jamming and excessive clearance between the raceway rings will occur in the tower crane during operation, resulting in vibration and local impact. With the development of the state, the slewing resistance will continue to increase and the slewing function will be lost.

2. The slewing bearing cage is damaged and scrapped

In order to avoid mutual friction between the rolling elements, the tower crane slewing bearing usually adds a spacer cage between the rolling elements. The material of the cage is generally copper, plastic, powder metallurgy or mild steel. During the working process of the bearing, the cage does not transmit the load, but it moves with the rolling elements. When the cage is damaged or broken, there will be a sharp and ear-piercing abnormal sound. As the broken body of the cage is pushed and rolled by the rotating rolling body, it will cause serious damage to the raceway ring and the rolling body. At this time, the slewing bearing meets the scrap standard and can be replaced.

3. The slewing bearing gear teeth are damaged and scrapped

The gear meshing methods of tower crane slewing bearing include external tooth meshing and internal tooth meshing. When the surface of the gear teeth is excessively worn, cracks and broken teeth occur. The tooth side clearance of the tower crane slewing bearing gear teeth increases, causing the slewing bearing to lose its function immediately when the tooth is broken, and it cannot be repaired. At this time, the scrapping standard of the tower crane slewing bearing is reached.

For more details click to visit:https://www.ldb-bearing.com/ldb-bearing-knowledge/scrap-standard-for-tower-crane-slewing-bearing.html