First, don't starve to lose weight in summer. We all know that weight loss is actually a process of mutual game between calorie intake and output. Fruit and vegetable salad is the best weight loss "nutritious meal".They can fill your stomach without gaining weight. But do you know how salad greens are harvested from the field to your hands by using mechanization in one go? Now, please follow me and find it out.

Customers' requirements for packaging of fruits and vegetables are getting higher and higher. Their requirements are more inclined to multi-batch, small batch, short cycle, less contact, etc. Work efficiency and safety factor are highlighted. Major fresh fruit and vegetable manufacturers, retail supermarkets, and vegetable market distribution factories have made efforts to build their own fresh processing and distribution centers. Realizing Intelligent upgrade in product packaging, weighing and sorting.

Fruits and vegetables are of different sizes, heavy and light in weight, and also contain water. In the process of weighing and packaging, how to achieve accurate measurement while ensuring food quality.

Multihead Weigher Functions and Features

1. Adopt high-precision digital sensor, fast sampling speed and high precision;

2. Can be reset manually or automatically and dynamic zero tracking;

3. The latest optimized sampling algorithm to improve weighing accuracy;

4. Multiple feeding hopper discharges can effectively solve blockage;

5. Intelligent fault detection and error reporting; Accurate positioning to solve problems;

6. The combination of weighing and counting functions to improve counting accuracy;

Mechanical properties

1. Standard universal parts design and strong interchangeability;

2. It is used for 5-liter volume hopper, suitable for weighing conventional large-weight materials and has a wide range of applications;

3. The upper feed hopper and lower discharge hopper are easy to disassemble for easy cleaning;

4. The chassis "return" type structure design; The whole machine structure is stable and the appearance is harmonious and beautiful;

In addition to various intelligent weighing and packaging equipment, our company has more intelligent equipment in development and testing.

It is also the unshirkable responsibility of UUPAC to continue to empower traditional agricultural automation and facilitate the rapid development of agriculture!

  On October 12, the National Development and Reform Commission issued the "Notice of the National Development and Reform Commission on Further Deepening the Market-oriented Reform of Coal-fired Power Generation On-grid Tariffs" (Fagai Price [2021] No. 1439), proposing to adjust coal-fired power generation transaction prices up and down The scope is no more than 20% of the benchmark electricity price, and it is clear that the document will be implemented on October 15. The increase in electricity prices is not good news for industrial and commercial companies, but it is indeed good news for photovoltaic companies. PV installation has now become a rigid demand. Distributed photovoltaics have different application scenarios in many places. Specific examples illustrate:

1.  Hosptial

  As a public service organization with high energy consumption, hospitals face great pressure in the future energy saving, emission reduction and consumption reduction work. The installation of photovoltaic power stations on the roof of the hospital actively explores the construction and development of green hospitals, and promotes the concept of green buildings and energy saving. The scientific application of consumption reduction technology is particularly important.

2. School

The school has the advantages of installing photovoltaic power plants: ① The power station is built on the roof of the school, which is a large science popularization base; ② The school has a wider roof, good structure and stable power consumption; ③ The school has stable operation, clear property rights, and relatively financing easy.

3. Highway

  Photovoltaic + highway has been widely used, making full use of the space resources of the highway, realizing the organic integration of photovoltaic power generation, transportation, energy saving and emission reduction, and road maintenance. Using highways as a new carrier of photovoltaic power generation led the new trend of the photovoltaic industry, created a new image of green highways, and laid a good foundation for the later smart highways. Photovoltaic is generally installed in the service area of the expressway, in the middle or on both sides of the road, in the tunnel or directly paved on the highway.

4. Industrial plant/park

  Industrial plants are the most widely used and most industrial and commercial projects. The installation of photovoltaic power plants in industrial plants can use idle roofs to revitalize fixed assets, save peak electricity bills, and use surplus electricity to connect to the Internet to increase corporate income, and it can also promote energy conservation and emission reduction, and generate a good society. benefit.

  In order to improve the reliability of lightning protection of distributed photovoltaic power plants and the safety of the human body, protective measures must be taken against voltage transients and surges. Jinli Electric’s photovoltaic surge protection devices can be offered.

The intelligent lightning protection system introduces the concept of intelligence into the lightning protection system, integrating the three major modules of "intelligent SPD online monitoring" + "lightning warning online monitoring" + "ground resistance online monitoring". It uses modern microcomputers and communication technologies to collect monitoring and collected data, so that lightning protection can be predicted in advance, from the previous passive protection to active protection. At the same time, it is more convenient for lightning protection product maintenance and management to be more timely, more convenient and more effective. On the basis of the above functional modules, the intelligent lightning protection monitoring system also has a graphical operating system that integrates lightning protection, operation monitoring, equipment management, report analysis, historical records, warning and user management.

SPD online monitoring: real-time monitoring of the working status of theSPD (such as leakage current, residual voltage, aging degree) to ensure its effective operation.

Ground resistance online monitoring: Continuously measure the resistance value of the grounding system to detect poor grounding or corrosion problems in time.

Lightning warning online monitoring : Combines meteorological data with electric field sensors to predict lightning activity and issue warnings in advance.

Advantages analysis:

1. Real-time monitoring and active early warning

Limitations of traditional lightning protection: Relying on manual regular inspections (such as once a year), sudden problems may be missed (such as instantaneous failure of SPDs and damage to the grounding system after a lightning strike).

Advantages of intelligent systems

1）Real-time feedback of SPD status: Once the leakage current exceeds the standard or the residual voltage is abnormal, the system will automatically alarm and generate a maintenance work order.

2) Dynamic monitoring of ground resistance: When the ground resistance value exceeds the threshold, an alarm is triggered immediately to ensure safe discharge of current during lightning strike.

3) Lightning warning accuracy: predict lightning activities 30 minutes to 1 hour in advance togain protection time for key facilities (such as airports and data centers).

2. Data-driven preventive maintenance

Traditional method: Maintenance relies on experience and judgment, and it is difficult to predict the life of equipment.

Intelligent system: Through long-term data accumulation, analyze the aging rules of SPDs and the changing trends of grounding resistance, and formulate targeted maintenance plans.

Case: A chemical plant discovered the SPD leakage current in a certain area increased year by year through monitoring data,andavoided the paralysis of the production line caused by lightning strike after replacingthe spd in advance.

3. Improve safety and reduce losses

Direct benefits: Reduce the risk of fire and equipment damage caused by lightning strikes; protect sensitive equipment (such as medical instruments and servers) to avoid data loss or business interruption.

Indirect benefits: Reduce insurance claims and accident compensation costs; enhance corporate safety image and increase customer trust.

4. Reduce long-term operation and maintenance costs

Traditional model cost: Manual inspection is expensive, and repair costs for sudden failures are high.

Intelligent system cost: The initial investment is higher, but the frequency of failures can be reduced in the long term through preventive maintenance.

Data shows: after a communication base station adopted intelligent lightning protection, the average annual maintenance cost was reduced by 40% and the failure rate decreased by 70%.

Necessity analysis

1. Coping with the high sensitivity of modern equipment

As the integration of electronic devices increases, their ability to withstand surges decreases significantly. Traditional lightning protection can only protect against direct lightning strikes, whileintelligent systems can fully resist threats such as inductive lightning and operational overvoltage.

2. Adapt to complex environment needs

Special places: such as oil storage tank areas, data centers, high-speed rail stations, etc., have extremely high requirements for lightning protection reliability, and the real-time monitoring and early warning functions of the intelligent system are indispensable.

Geographic factors: Areas with high incidence of lightning (such as tropical and mountainous areas) require more precise protection strategies. Smart systems can optimize lightning protection layout through data analysis.

3. Promotion of regulations and standards

International standard: IEC 62305 explicitly requires continuous monitoring of lightning protection systems.

Domestic policy: GB/T 21431-2015 "Technical Specifications for Testing of Lightning Protection Devices for Buildings" encourages the use of online monitoring technology.

Industry requirements: Electricity, communications, transportation and other fields will gradually incorporateintelligent lightning protection into mandatory safety standards.

4. The inevitable trend of digital transformation

The advancement of concepts such as smart cities and Industry 4.0 requires the simultaneous intelligentization of infrastructure and safety management. As the core link of safety assurance, the lightning protection system must be integrated with the digitalization process.

  Regardless of TN system or TT system, the connection wires at both ends of the SPD connected to the live conductor and PE line should be short and straight. The IEC standard stipulates that the total length of the SPD connection wire should not exceed 0.5m. This is because the lightning impulse current has high-frequency characteristics, and the lightning impulse overvoltage applied to the protected electrical equipment is the residual voltage on the SPD plus the Ldi/dt high-frequency voltage drop on the connection wire (L is the inductance of the wiring at both ends of the SPD, which is proportional to the length of the connection wire, and di/dt is the steepness of the change of the lightning impulse current). The residual voltage of the SPD is determined by the product performance and cannot be changed, while the Ldi/dt on the connection wire can be reduced in the design of the electrical device by reducing the length of the connection wire, that is, reducing the inductance. Therefore, it is best to install the SPD directly between the live conductor busbar and the PE busbar of the distribution box to minimize the length of the connection wire. Now some SPD products have been made according to the modulus of the miniature circuit breaker in the distribution box so that they can be directly installed in the distribution box, which is very beneficial to shorten the length of the SPD connection wire.

  If this is difficult to do for some reason, the SPD can be installed elsewhere. In this case, it is best to use a "V" connection method for the SPD, as shown in Figure 1. The length of the SPD connection line in the figure is almost zero, but this connection method will encounter some difficulties and inconveniences in actual construction.

Figure 1 V-shaped connection in SPD connection

1. The role and limitations of lightning rods

Intercepting direct lightning strikes: Lightning rods attract lightning through tip discharge and safely conduct lightning current into the earth through down conductors, protecting building structures from damage by direct lightning strikes.

Limited protection range: The protection range of a lightning rod depends on its height and rolling ball radius, and it cannot cover all possible lightning strike paths.

No protection against induced lightning and surges: When lightning strikes occur, even if the lightning rod successfully conducts the lightning current, the strong lightning current will still induce transient overvoltage (surge) in nearby wires (such as power lines and signal lines). These surges can enter the building through the lines, damage electronic equipment, and cause electrical fires.

2. The core role of SPD

Discharge surge energy: SPD limits transient overvoltage in the line to a safe level through rapid response (nanosecond level) and discharges excess energy to the ground.

Protect sensitive equipment: Prevent power surges from damaging computers, home appliances, communication equipment, etc. through power and communication lines (even if the building is not directly struck by lightning).

T1 SPD: Installed at the incoming line end of a building (such as the main distribution cabinet) to deal with high-energy surges introduced by direct lightning strikes.

T2 SPD: Installed in the distribution cabinet or at the front end of the equipment to further limit the residual pressure and protect the terminal equipment.

3. Collaborative protection of lightning rod and SPD

External lightning protection + internal lightning protection：

Lightning rod (external lightning protection): responsible for intercepting direct lightning strikes and protecting the building structure.

SPD (internal lightning protection): responsible for eliminating induced lightning and surges, protecting electrical systems and equipment.

Actual scenario example：

The lightning current enters the ground through the down conductor, but it will generate an induced surge in nearby conductors. Without SPD, power surges may enter the room along the power lines, burning out electrical appliances or causing fires. When lightning does not directly strike the target building: when lightning strikes the nearby ground, buildings, or discharges between clouds, the changing electromagnetic field induces overvoltage on the power grid conductor, and SPD can protect against such surges.

1. Required bythe standard

1）Required by the standard, the national standard is mandatory

GB 50057 Design code for protection of Structures against lightning：

Article 4.5.4 clearly requires that lightning protection devices should be inspected regularly, generally once a year;toflammable and explosive places, the inspection cycle needs to be shortened to once every six months.

Article 6.4.3 stipulates that the grounding resistance value must meet the design requirements (usually ≤10Ω, ≤4Ω in important places), otherwise rectification is required.

2）Industry norms and legal basis

"Work Safety Law": requires enterprises to fulfill their primary responsibility for lightning protection safety, and those who fail to conduct regular inspections and cause accidents must bear legal responsibility.

IEC 62305 series of standards: The International Electrotechnical Commission emphasizes that lightning protection systems must be periodically tested to ensure their effectiveness, especially in areas with high incidence of lightning.

2. Actual on-site requirements

1）Prevent direct damage from lightning strikes

Fire and explosion risks: Lightning strikes can directly ignite flammable materials in places such as gas stations and chemical plants. Testing ground resistance and equipotential bonding can eliminate potential spark discharges.

Structural safety: Corrosion or breakage of lightning arresters may result in the inability to safely discharge lightning current, causing damage to buildings.

2）Protect equipment and systems

Vulnerability of electronic equipment: Lightning strikes or power surges can damage precision equipment such as servers and medical devices. Testing SPD performance (such as residual voltage and leakage current) can ensure that it effectively limits voltage.

Power system stability: Detection of shielding and wiring compliance of distribution lines can reduce the impact of lightning-induced overvoltage on the power grid.

3）Adapt to environmental changes

Facility aging: Grounding corrosion and SPD component degradation are inevitable over time, and regular inspections can help replace failed components in a timely manner.

Site renovation: Building expansion or use change may damage the original lightning protection system, requiring reassessment of lightning protection level and adjustment of configuration.

4）Necessary needs for special places

Communication base stations and data centers: The high reliability of the lightning protection system must be ensured to avoid business interruption and data loss.

Hospitals and airports: Lightning protection failure may threaten life safety, and detection is a core measure to ensure the uninterrupted operation of critical facilities.

3. Undetected potential risks

1）Legal liability and economic compensation

If a lightning strike accident occurs due to failure to detectit, the company may face administrative penalties, civil compensation or even criminal liability (such as major safety accident crime).

2) Hidden safety risks

For example, if the grounding resistance exceeds the standard but is not discovered, the current cannot be effectively discharged when lightning strikes, which may cause step voltage electric shock or equipment damage.

3) Shortened equipment life

The leakage current of an SPD that has not been detected for a long time will increase, which may accelerate aging and eventually lose its protective function, causing frequent equipment failures.

Multi-function stone cutting machine is an efficient processing machine integrating cutting, chamfering and grooving, designed for tiles, slate, stone and other materials. Its intelligent operation and precise cutting ability make it an ideal choice for the building and decoration and stone processing industries. The Portable Stone Cutting Machine adopts a folding design and is equipped with rollers at the bottom, making it easy to move and store, which greatly enhances the flexibility of the workplace. Widely used in: construction and decoration projects, tile and stone processing plants.

Core Features

The multifunctional 45-degree stone chamfering machine is very noteworthy. The advanced technology and innovative design of this machine can chamfer the edges of stones at an angle of 45 degrees. It can be applied to various stone materials, such as marble, granite and quartz. The emergence of this machine makes stone chamfering simpler and more efficient.



The advantages of the multifunctional stone chamfering machine are not only reflected in the flexibility of its chamfering angle. It also has multiple functions, such as chamfering, polishing and repairing. Through the stone chamfering machine, multiple stone processing steps can be completed at one time, reducing the time and labor costs of traditional processing methods. This enables stone processing plants to produce more efficiently and provide better quality and more beautiful stone products.



In addition, the stone slab chamfering machine is also an important tool for modern stone processing. It is specially used for chamfering large stone slabs. This machine usually has automation functions, which can accurately control the movement and angle of the tool to ensure the consistency and accuracy of the chamfer. The emergence of stone slab chamfering machines has greatly improved the efficiency and quality of stone slab production.

SMT provides you with the latest technology multifunctional stone chamfering machine, which is suitable for building panels such as rock slabs, tiles, marble, artificial stone, granite, cement products, etc. It is an ideal equipment for small and medium-sized home improvement factories and processing stores. Welcome to contact us.

A CNC Stone Router is a computer-controlled cutting machine related to stone engraving machines used to cut a variety of hard materials. They are essential machines for many stone engraving applications.

The main components of a CNC engraving machine include a dedicated software system, a controller (and its drivers), a cutting table and engraver spindle, and coolant to ensure the longevity of the tool.

The software is the brains of the operation, responsible for translating the digital design into physical coordinates for the machine to follow. The most common types are CAD (Computer Aided Design) and CAM (Computer Aided Manufacturing) software. The spindle of a stone carving machine is the heart of the machine. It is the part that does the actual cutting, rotating the cutting tool at high speeds to cut the material.

While CNC Stone Routers are known for cutting wood and metal, they can also effectively cut stone, which we'll explore below. Our CNC stone carving machines are specifically designed to work with stone rather than wood, especially by adding a constant stream of water to cool the tool and then circulating it back to the machine.

Various types of stone can be cut using the CNC Stone Engraver. These include but are not limited to marble, granite, limestone, sandstone, and slate. Let's take a closer look.

Marble is a soft stone that can be easily carved and sculpted using a CNC Stone Router. It is an excellent choice for intricate designs.

Granite is a harder stone and requires more power to cut. However, even complex designs are possible with the right CNC Stone Router and cutting tools.

Limestone, like marble, is relatively soft and can be cut using a CNC Stone Router. It is commonly used for decorative features and wall cladding.

Sandstone is another stone that can be easily cut with a CNC stone carver, making it ideal for a variety of decorative uses.

Slate is known for its fine grain and hardness and is commonly used for flooring, roofing and paving slabs. CNC milling machines can cut and carve slate with precision, making it an invaluable tool for craftsmen and builders.

Welcome to contact SMT to get free inquiries.

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