Price and device construction of mobile lifting lightning arrester

Time：2020-09-02 View：

The general price of mobile lift Lightning arrester depends on its specification. The general price can be bought at hundreds of yuan for your reference.
If the building is installed with a lightning device but there is no grounding or the grounding effect is not good, it will cause more damage to the building or its personnel when the lightning is connected, compared with buildings without flash connectors, it is more unsafe.
The lightning strike accident happened in Kaixian County, Chongqing in 2007, because the roof of the classroom was made of reinforced concrete board, and the steel bars were not well grounded, so there was no place to discharge when the Thunder occurred, so as to discharge the indoor staff through the roof and walls of the classroom, causing the tragic accident that seven primary school students in the classroom died and dozens of people were injured.
According to the requirements of Chapter 5 "lightning protection device" in GB50057 "code for lightning protection design of buildings", the lightning device can use copper, tinned copper, aluminum, aluminum alloy, hot dip galvanized steel, stainless steel, the outer surface is made of copper-plated steel and other materials, as long as it meets the requirements of its minimum cross section and thickness. That is to say, as long as it is not so easy to rust and not easily damaged due to wind, rain and rain, most common metal materials can be used to make flash connectors. Taking the most common iron connecting rod as an example, GB50057 requires that its minimum diameter should not be less than 8mm.
In this sense, the vast majority of building steel bars in the market can be used to make lightning arrester as long as its diameter is greater than 8mm. It only needs to be painted with one or two layers of antirust paint on its surface after installation, its price is very low. In this sense, Lightning arrester has no brand, because lightning arrester is only a small category of lightning arrester, and any metal component can be used as lightning arrester. It only emphasizes the function of lightning arrester, emphasizes the famous brand of lightning arrester, and ignores the joint function of other lightning arresters, this concept is harmful and needs to be corrected, ignoring the objective fact that the lightning arrester cannot play a role without the lead-down line and grounding device.
It should be noted that there are various so-called lightning arrester of well-known brands in the market, most of which use 'pre-discharge 'or 'pre-discharge' as their selling points, most of them are so-called "special lightning arrester" imported from abroad. The claimed protection scope is far beyond the protection scope calculated according to the principle of ball rolling method, and its price is very expensive, tens of thousands of yuan each. So far, the so-called scientific principles of these lightning arrester have not been recognized in mainland China, and their lightning protection effects have not been recognized in practice. Even if such a lightning arrester is installed on the building, it still needs to be calculated according to the principle of the traditional rolling ball method during the lightning protection acceptance. Customers who have bought such a lightning arrester at a high price, beware of such risks.
Therefore, instead of buying such a so-called special lightning arrester at a high price to protect the building, it is better to carefully investigate the site, carefully design, calculate and verify it according to the scientific principle of the rolling ball method, carry out on-site construction honestly in accordance with the national regulations, and use ordinary lightning arrester, Lightning arrester and other lightning arrester to put all the protected places in place, so as to achieve the goal of being safe, reliable and economical.
The so-called rolling ball method assumes that a sphere with a certain radius (100 meters, 60 meters, 45 meters, 30 meters according to the different protection levels of the building) rolls along the outer surface of the building, when the sphere only touches the lightning device and the ground, but does not touch the part that needs protection, the part will be protected by the lightning device. Generally speaking, the place that the sphere can touch is the place where the Thunder can hit, and the place that the sphere cannot touch is within the protection scope of the lightning device.
The calculation of the protection range of the lightning arrester is listed in the appendix D' rolling ball method to determine the protection range of the lightning arrester of GB50057 "code for lightning protection design of buildings, two equal height connecting flash poles, two unequal height connecting flash poles, four equal height connecting flash poles arranged in rectangle, one connecting flash line (connecting flash belt, lightning protection belt), the calculation method of the protection range of the protection range of two isometric flash lines, and the relevant schematic diagram is drawn.
For the vast number of technical personnel in the lightning protection industry, according to the method given by GB50057, some simple situations can be calculated manually, but in daily work, we often encounter the scene situation which is much more complicated than the cases listed in the specification, such as: Several flash connecting rods with different heights and not arranged in a regular way, flash connecting lines with different heights, for the protection range of the joint of the connecting rod and the connecting line, the calculation of these complicated situations cannot be carried out by hand, and GB50057 does not give a specific calculation method. This problem is a common technical problem in the lightning protection industry.

About lifting lightning arrester and device construction

 

Features of electric lift Lightning arrester
The electric lifting lightning arrester uses the deceleration motor as the power and drives the rod body to lift through spiral sliding transmission power. The rod body is made of high-strength aluminum alloy. It is divided into double extension structure and section-by-section lifting structure. Double extension structure is the simultaneous lifting of movable pipe, and section-by-section structure is the relay lifting of movable pipe.

 

Connection and application of Electric Control Box
Connection and application of AC 220V Electric Control Box
Insert the 9-pin plug of the AC Electric Control Box into the socket on the base of the lifting lightning arrester and tighten it.
Plug the three-pole power plug on the Electric Control Box into the AC 220V power socket with ground wire.
The three buttons on the Electric Control Box: "FWD", "REV" and "OFF" respectively control the up, down and stop of the lifting rod.
Note: During the reversing operation during the lifting process (for example, from up to down, or from down to up), you must first press "OFF"
Stop the button and stop the reversing operation after the rod body stops lifting.

 

Connection and application of DC 24V Electric Control Box
There is a three-position switch handle on the side of the DC Electric Control Box, and the upper, middle and lower positions respectively control the up, down and stop of the lifting rod.
Insert the 4-pin plug of the DC Electric Control Box into the socket of the base of the lifting lightning arrester and tighten it.
Plug the two-pole power plug of the DC Electric Control Box into the DC 24V power socket. Note: Do not connect the "+" and "-" Poles in reverse.
Note: During the reversing operation during the lifting process (for example, from rise to drop, or from drop to rise), the switch must be turned to the "middle" stop position first, when the rod body stops lifting, the reversing operation is stopped.

 

Installation method of vehicle-mounted electric lifting lightning arrester
Confirm the position of the device, the bottom support plane is parallel to the axle line, and the area should be equivalent to the size of the bottom plate of the rod body, so that the hand handle has a space for rotation. It is fixed with the base through four holes on the base plate of the rod.
Confirm the position of the hoop device with the axis of the fixed tube sheet of the lifting rod and the corresponding axis of the hoop, and pad the hoop with the fixed tube sheet with 2mm thick rubber device hoop.
Device request:
① the bottom plate of the lifting rod and the hoop device must ensure that the rod body is perpendicular to the degree surface of the car body.
② the device of the bottom plate and the hoop must ensure accurate position at the same time, and one end cannot be fixed and the other end cannot be fixed forcibly due to improper position.
③ the hoop and bottom support should be installed on the objects that cannot be displaced.
④ The clamp of the hoop to the rod body should not be too tight, so as not to make the deformation of the rod body affect the normal operation of the lifting rod.
Maintenance and maintenance of electric lifting lightning arrester
When the lifting lightning arrester is in the closed state and stored in the open air environment, it must wear rain-proof and dust-proof covers.
Before the lift Lightning arrester is closed, it should be dried and stored.
If it is not used for a long time, it will rise and dry every half a month in the rainy season; It will rise and dry every month in the non-rainy season.
If it is not used for a long time, it must be powered on every three months to make the lifting rod work once.