How to choose hydrogen peroxide transportation? The tank truck will tell you the answer!

Hydrogen peroxide has strong oxidizing properties, and it will cause explosion after contact with flammable substances and organic substances, and there is a danger of combustion and explosion during impact, friction and vibration. Therefore, the transportation of hydrogen peroxide is a particularly troublesome thing. Today, the tanker sales manufacturer will introduce a semi-trailer tank truck specially designed for hydrogen peroxide transportation to truck drivers, which is not only safe, but also pulls more!

33 square stainless steel semi-trailer tank truck

tank truck

High-quality selection

The tank body is made of high-quality stainless steel, with circular section and variable diameter design, the center of gravity of the whole vehicle is lower, and the transportation is safer;

tank truck

Patent structure

The patented structure of the outer reinforcement ring, the scientific arrangement of the butterfly-shaped wave-proof board and the simple wave-proof board, the impact resistance is better;

tank truck

Reasonable match

Short wheelbase and long rear overhang are suitable for transportation in complex road conditions; the frame is made of high-strength steel, and the structure is safer after CAE force analysis;

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Details can be accessed by clicking here:https://www.ly-cimc-linyu.com/news/33-square-stainless-steel-semi-trailer-tank-truck/

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Tractor clutch friction disc replacement

Due to improper operation, the tractor is subjected to shock loads during use, which is prone to wear, cracks and burns of the main clutch driven disc friction disc, warping of the driven disc, loose friction disc and spline bushing rivets, and keyway wear and so on. The friction disc of the driven disc is worn to the extent that the rivets are exposed, the cracks are in more than two places, and the charring, etc., should be replaced with a new tractor friction disc.

14-Inch-16-Spline-PTO-Disc

1. Replacement of tractor clutch friction disc

(1) Use a drill bit slightly smaller than the diameter of the rivet to drill out the old rivet, or use a special punch to punch out 1 old rivet, remove the old friction plate, and check and correct the warpage of the steel plate.

(2) Put the steel disc and the spline bushing together on the mandrel for inspection, and close to the shoulder. Touch the dial indicator contact pin to the edge of the steel disc, so that the runout of the end face does not exceed 0.5 mm. Excessive use of wide-mouth wrench for correction. The steel plate can also be placed flat on the platform. Check its warpage by measuring the height of its edge.

(3) Clamp the friction disc on the steel disc with a vise, and drill the holes of the two friction discs according to the hole position of the steel disc, and make a mark to prevent dislocation during riveting, and the two friction discs cannot be interchanged.

(4) Countersink the friction side according to the diameter of the rivet head. The friction discs are then riveted to the steel disc with copper or aluminium rivets. Each row of rivets should be riveted from two sides alternately, so that the rivet heads are evenly distributed on both sides.

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Details can be accessed by clicking here:https://www.syclutch.com/news/tractor-clutch-friction-disc-replacement.html

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Grow racks affect plant growth? How should I choose?

The choice of grow rack is a key factor affecting plant growth. Choosing the right grow rack is especially important for plant growth. In addition to size, material, color, firmness, use period, shape, drainage and ventilation and other factors have an impact on the growth of plants.

Selection of grow rack types and specifications

Mobile carts

The growth rate of plants is closely related to the type and size of grow racks selected. For example, a large number of experiments have shown that the plant height and ground diameter growth of most plant species will increase with the increase of the size of the planting frame, but the rate varies according to the characteristics of the plants. Of course, in the case of meeting the needs of plant growth, we should also try to reduce the size of the grow rack to reduce the amount of substrate used, thereby reducing the cost of plants, and the cost of the grow rack itself should also be considered. Therefore, as long as the type and specifications of the planting frame are selected reasonably, the growth rate of the plants will not be inferior to that of the ground plants.

1. Size

In the process of plant growth, the size of the planting frame should not be sloppy. Some people use large grow racks from the beginning to save trouble, but large grow racks are more difficult to control in terms of water and fertilizer management. Small seedlings in large pots will not dry out when watered, and some areas will remain wet all the time, which will cause the soil to be impermeable and the root system of plants to grow, so it is not recommended to use it.

In order to save costs, some people choose to cultivate plants in smaller sizes, which are easy to root and pack, which is very detrimental to the root growth of seedlings. The size of the planter should be changed according to the growth of the plant and the positioning of the product, and it should not be too large or too small.

2. Color

The influence of the color of the planting frame on the growth of seedlings is mainly manifested in summer. If it is black, in summer, when exposed to sunlight, the temperature of the medium may exceed 48 degrees, and if it is white, the temperature of the medium can be appropriately lowered.

However, the white planting frame has relatively weak UV resistance, and the service life is not as long as the black one. Also, white planters are very light in color, and algae growing on the periphery of the medium will reduce the oxygen levels that promote root growth. Therefore, it is generally better to choose black. After choosing black, the work of shading in summer should be done well. In summer, you can choose to appropriately increase the density of plants, which will help the plants shade each other and reduce the temperature.

3. Material

In addition, the effect of the material of the planting frame on the growth of the plant is also obvious. Materials with good air permeability are definitely more conducive to the growth of seedlings. Especially in hot summer, if it is a material with good air permeability, it will help to reduce the growth temperature of plants.

How to choose a grow rack?

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Details can be accessed by clicking here:https://www.etegreen.com/blog/grow-racks-selection/

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INSTALLATION REQUIREMENTS AND PRECAUTIONS FOR CALCIUM HYDROXIDE PRODUCTION LINE

In order to ensure the stable operation of the calcium hydroxide production line and ensure normal production, it is inseparable from the correct installation. For the installation requirements and precautions of the calcium hydroxide production line, the calcium hydroxide production line manufacturer gave us a detailed introduction. One Get up and find out!

CALCIUM HYDROXIDE PRODUCTION LINE INSTALLATION REQUIREMENTS

GFX Stepped Case

1. Device positioning

According to the layout of the entire production line and the axis or edge line and elevation line of the building, the installation reference line is delineated. Equipment that is connected, connected or arranged with each other should release a common installation reference line; according to needs, the target board or reference point can be embedded, and the specific basic position line and elevation line can be set.

2. Overall inspection

After installation, check the overall equipment, check the coordinate position of the foundation, the elevations of different planes, the dimensions of the plane, the dimensions of the plane on the boss, the dimensions of the cavity, the level of the plane, the vertical degree of the foundation, and the pre-buried ground. The elevation and center distance of the anchor bolts, the center position, depth and vertical degree of the hole wall of the embedded anchor bolt hole, the elevation and center position of the anchor plate of the embedded movable anchor bolt, the grooved anchor plate and the threaded anchor plate. level, etc.

3. Preload test

The preload test is a preventive measure taken to prevent the installation of heavy equipment from unqualified installation due to uneven subsidence of the foundation after installation. The preload of the test is not less than the sum of the forces acting on the foundation of the equipment under full load operation. The points shall not be affected by the settlement of the foundation, and the observation points shall be no less than four points evenly distributed around the foundation. Observations should be timed and should be until the foundation is substantially stable.

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Details can be accessed by clicking here:https://www.ly-gaifeng.com/blog/calcium-hydroxide-production-line-installation.html

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How much is a set of student desks and chairs? What are the factors that affect the price?

The use of student desks and chairs in schools is very common, because if the school does not have student desks and chairs, students cannot carry out normal learning, and the study desk is very important, so the school is choosing student classes. When it comes to tables and chairs, you need to choose carefully.

Of course, the price of student desks and chairs is very important when choosing. I believe that many buyers are more concerned about price. So how much is a set of student desks and chairs?

The price of student desks and chairs

The price of student desks and chairs is different. There are many factors that will affect the overall price of student desks and chairs. However, the price of student desks and chairs is generally between 100 yuan and 500 yuan. This price is also Market conditions are also a relatively common price range. In addition, the price will be higher, ranging from 500 yuan to several thousand yuan. These are generally functional desks and chairs or customized desks and chairs. .

Factors affecting the price of student desks and chairs

Student Desk with Attached Chair

1. The influence of the material of desks and chairs

There are many materials for student desks and chairs. The materials are generally wood, steel, and plastic materials. In addition, there are combined materials, plastic-steel materials, steel-wood materials, and so on. The difference in these materials will also cause the price difference.

2. The influence of the design of desks and chairs

In addition, the design structure of student desks and chairs also has a great influence. The design is simple and complex or other small humanized designs. In addition, there is also the structure of desks and chairs. For example: the same material, the square stool is better than the one with backrest Chairs are cheaper and less material. These all affect the price.

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Details can be accessed by clicking here:https://www.aoyangschoolfurniture.com/aoyang-news/student-desk-and-chair-price.html

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What are the classifications of slewing bearings? How to choose a model?

There are many classifications of slewing bearings, each type has different characteristics, and the scenarios used are also different. You may not be very clear about the selection type. Generally, the selection type should be considered: slewing accuracy, bearing capacity, working temperature, In terms of running speed, etc., let’s take a look at the specific method with the slewing bearing manufacturer~

Classification of slewing bearings

Four Point Contact Ball Slewing Bearing

1. Three-row combined roller slewing bearing

The three-row roller slewing bearing has the upper and lower and radial raceways of the three races separated, so that the load of each row of rollers can be accurately determined. It can bear various loads at the same time, has a firm structure, and has large shaft and radial dimensions. It is suitable for heavy machinery requiring large diameters.

2. Double row angular contact ball slewing bearing

The double-row ball slewing bearing has three races, and the steel balls and spacers can be directly discharged into the upper and lower raceways. According to the stress conditions, two rows of steel balls with different diameters are arranged. The axial and radial dimensions of the double-row ball slewing bearing are relatively large, and the structure is firm, especially suitable for machinery that requires a medium or larger diameter.

3. Single row cross roller slewing bearing

The single-row cross-roller slewing bearing is composed of two races, with compact structure, high manufacturing precision, light weight, small assembly clearance, and can bear axial force, large radial force and tipping moment at the same time.

4. Single row four-point contact ball slewing bearing

The single-row four-point contact ball bearing slewing bearing is composed of two races, with compact structure, light weight, four-point contact between the steel ball and the arc raceway, and can bear axial force, radial force and tipping moment at the same time.

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Details can be accessed by clicking here:https://www.ldb-bearing.com/ldb-bearing-knowledge/slewing-bearing-classification.html

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Analysis of the causes and solutions of large vibration of vibrating screen

In mining and other industries, it is necessary to use vibrating screen to screen materials. When the vibrating screen is used, it has a strong exciting force, and the material is also screened because of this exciting force. After using the vibrating screen for a period of time, the screen machine may have a problem of large beating. If the beating is serious, it may cause the side plate to break. Therefore, when this phenomenon is found, it should be solved immediately, but the first thing is to analyze the cause.

The reason for the large vibration of the vibrating screen

High frequency dehydration vibrating screen

1. The damping spring has high hardness
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If the hardness of the vibration damping spring is too large, it may not be able to achieve the effect of buffering, so the vibration screen will have a problem of large beating when it is running. Because the function of the damping spring is to connect the screen base and the screen frame, and it can also play a buffering role. Therefore, the hardness of the damping spring should not be too large.

2. Bearing radial clearance problem

If the radial clearance of the vibrating screen bearing is too small or too large, the bearing system will generate large vibration, and the whole vibrating screen machine will show a large beating phenomenon. When the radial clearance is too small, it will cause high frequency vibration; when the radial clearance is too large, it will cause low frequency vibration. If the radial clearance is too large, the radial natural frequency of the bearing elastic system will be reduced, resonance will easily occur, and large low-frequency vibration will be generated.

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Details can be accessed by clicking here:https://www.hsd-industry.com/news/reasons-and-solutions-for-large-vibration-of-vibrating-screen/

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High pressure roller mill roller assembly and roller sleeve installation steps

As a large-scale crushing equipment, the high-pressure roller mill is usually installed on site after the components are assembled in the workshop. The roller, as the main crushing component of the high-pressure roller mill, has stricter requirements in terms of assembly and installation. , The following briquetting machine manufacturers have sorted out the installation steps of the high-pressure roller mill rollers and roller sleeves for your reference.

Assembly of high pressure roller mill rollers

The assembly and installation of the high-pressure roller mill rollers are mainly divided into two stages. The first is to install the roller sleeve on the roller core in the workshop. Usually, the burner is hot-loaded. After the roller sleeve is hot-installed, it is installed after natural cooling. Bearings; the second stage is the overall transport of the rollers and the installation of the rollers on the equipment.

roller-shell

1. Roller sleeve installation steps

(1) Before assembling, measure the inner diameter of the roller sleeve and the outer diameter of the roller core. The inner diameter of the roller sleeve is checked with an inner diameter micrometer. The graduation value is 0.002mm. The outer diameter micrometer suitable for this roller core is 1000mm~ 1500mm, the division value is 0.01mm, the division value is too large, the equipment comes with a special tool for measuring the roll core, the measurement is divided into three parts: upper, middle and lower, and each part is divided into three points A, B, and C. The average value of the measured data is taken. The inner diameter of the roll sleeve is smaller than the outer diameter of the roll core by 0.2mm~0.5mm.

(2) Use kerosene to clean the anti-rust oil on the roller core, there should be no burrs on the roller core, then erect the roller core on the erected bracket, adjust the verticality of the roller core with a level ruler, and wipe a small amount of lubricating oil.

(3) Assemble the roller sleeve after the adjustment of the roller core. Before hoisting, wipe the heating interior with acetone, hoist it away from 10cm, adjust the levelness of the roller sleeve with a spirit level, and quickly set it on the roller core after the adjustment is qualified.

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Details can be accessed by clicking here:https://www.zymining.com/blog/high-pressure-roller-mill-roll-assembly.html

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What is the operating procedure of the valve bag packaging machine

As the name suggests, the valve bag packaging machine is used to produce valve bags. Generally speaking, the main operating procedures are mainly divided into two parts, namely pre-production inspection and packaging. If you are familiar with these two parts, you will be familiar with how to operate, but during operation, Some things need to be paid attention to, otherwise problems are prone to occur.

1. Check

(1) Check that the selector switch is in the manual position before power-on;

(2) After power-on, observe that the weighing instrument is at the normal zero position;

(3) Check that the pressure of the control gas source is 0.5mpa, and the pressure of the fluidizing gas source is 0.05mpa.

HT120-IA Paper Tube Machine

2. Packaging

The selector switch is switched to the automatic position, the packaging bag is clamped, and the packaging machine automatically completes the following functions: opening the feeding butterfly valve → closing the feeding butterfly valve → start of fluidized discharge → end of fluidized discharge → lift up the bag clamping cylinder → turn over the bag → Next cycle.

Manual: for manual discharge and reset;

Automatic: normal packing;

Clearance: used in the last few packs or when the material is blocked;

The meaning of the indicator light:

(1) The feeding indicator light is on, indicating that the feeding butterfly valve has been opened, and the material enters the fluidization bin of the valve bag packaging machine from the large silo.

(2) The discharge indicator light is on, indicating that the feeding butterfly valve has been closed, the fluidization valve and the fast and slow discharge valve have been opened, and the material enters the packaging bag from the fluidization bin.

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Details can be accessed by clicking here:https://www.lyhuatianm.com/products-information/valve-bag-packaging-machine-operating-procedures.html

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How to judge clutch friction disc performance

The clutch disc is a composite material with friction as its main function and structural performance requirements. Tractor friction materials are mainly used to manufacture brake friction discs and clutch discs. These friction materials mainly use asbestos-based friction materials. With the increasing requirements for environmental protection and safety, semi-metal friction materials, composite fiber friction materials, and ceramic fiber friction materials have gradually appeared.

Since friction materials are mainly used in the manufacture of brake train and drive train parts on tractors, a sufficiently high and stable friction coefficient and good wear resistance are required. So how do we judge the performance of the clutch friction disc? In response to this problem, the tractor clutch manufacturer gave us a detailed explanation.

1. Appropriate friction coefficient

The friction coefficient is the most basic parameter of the friction material, which determines the basic braking torque of the brake disc. The national standard strictly requires manufacturers to indicate the coefficient of friction on the packaging. The friction coefficient must be appropriate. Too high will cause wheel lock, direction loss and burning during braking, while too low will result in too long braking distance.

2. Reliable security

Brake discs will generate instantaneous high temperature when braking, especially at high speed or emergency braking. At high temperature, the friction coefficient of the friction disc will decrease, which is called thermal recession. The level of thermal decay determines the safety in high temperature conditions and emergency braking.

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Details can be accessed by clicking here:https://www.syclutch.com/news/clutch-friction-disc-performance.html

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