What are the difficulties in lightning protection construction of ancient buildings?

February 15, 2020

Compared with modern buildings, the geographical environment and geological conditions around most ancient buildings are not ideal, and the shape and structure of buildings are also complicated. Therefore, the construction and installation of lightning protection devices for ancient buildings has special difficulties, and the lightning protection effect is also worse than that of modern buildings. The main difficulties include: First, the spacing of the lightning rods (belts) of the ancient buildings leading down the line, sometimes it is difficult to meet the requirements of lightning protection specifications. Second, many ancient buildings are built in the mountains and mountains, and the surface is mostly rock. It is difficult to meet the requirements of the grounding resistance. Third, some ancient buildings have relatively large pedestals and are surrounded by thick stone steps. It is difficult to make grounding bodies and grounding wires. Fourth, some ancient buildings have been in disrepair for a long time, bricks and tiles are broken, and coffins are rotten. It is difficult to install lightning protection devices on them.
It is worth emphasizing that lightning protection pins, lightning protection belts, down conductors and grounding bodies are required for the protection of direct lightning strikes on buildings. However, the installation and installation of these objects, if not ingeniously integrated with the ancient structures and shapes, will directly affect the artistic style of ancient buildings. The lightning protection belt shall be laid on the roof. Under the premise of complying with the lightning protection technical standards, the lightning protection belt shall be designed as the contour line of the ancient building roof. The material selection shall be consistent with the color tone of the roof. For example, at present, the support frame of the lightning protection belt is usually fixed on the tile and the ridge by using a U-shaped card. However, due to the degree of firmness and the construction and installation process, the lightning protection belt is easy to fall, and the gray tile at the fixed position of the U-shaped card is likely to cause different degrees. damage. Industry experts suggest that standards should be established as soon as possible to design a lightning rod (belt) fixing method that does not cause damage to ancient building roofing.

Wall Mounted Jib Crane is a new suspends and transport equipment based on column mounted jib cranes or floor fixed Jib Crane, its rack is fixed on concrete wall in the factory workshop. Wall Mounted Jib Crane can move in longitudinal way while Electric Hoist can finish transverse movement along horizontal vertical direction.

The wall mounted swing arm jib crane expands the scope of working and uses the space of factory building efficiently, have a better use effect.

Features:

* Capacity: up to 10 ton

* Arm Length: 1-7.5 m

* Lifting Height: up to 18 m

* Cross Rotation Speed: 3-5 r/min

* Lifting Speed: As per hoist(0.8/5 or 0.66/4)

* Temperature: -20 - 60 degree

* Control Method: Pendant Control, Remote Control

* Work Duty: A3, A4, A5

* Power Source: 240-440V, 50/60HZ, AC-3P

* Cantilever: N/A

Wall Mounted 180 Rotary Jib Crane

Parameter for 3ton wall mounted jib crane:

Capacity(Kg)

3000

 

 

Arm length(mm)

3000

Lifting speed

8m/min

Ration speed

0.48R/min

Working lifting speed

20m/min

Ration angle

180 degree

Electric hoist

CD1-3T

Wall Mounted Jib Crane Design

Technical Requirements:

The manufacture and installation are required to meet the technical standard of  JB/T8906-1999 for Slewing Jib Crane.The main beam of operation adopts KBK track; the electric hoist uses CD1-3T steel chain, and uses BLED cycloidal reducer to rotate. The hoist is driving by electricity.

No

Code

Description

Material

08

GB/T6170-2000

Hexagon nut

 

07

GB/T93-1987

Spring washer

65Mn

06

GB5781-2000

Hexagon bolt

35

05

BQ5-3.3

Supporting frame

Q235

04

diameter 6steel rope

Slid wire

 

03

30#joist steel

Rotation assembly

Q235B

02

CD1-3T

Electric hoist

 

01

BLED31-1003-0.75

Rotation device

 

Wall Mounted Jib Crane Wall Mounted Jib Crane

Advantage

1. Reasonable, compact and beautiful structure, Precise and experienced designing

2. Safe and smooth running with safety accessories, smooth starting and stopping performance

3. Low noise, commodious cabin and good view space

4. Maintenance-free for lifting mechanism and excellent changeability for spare parts

5. Energy saving with minimum possible power, suitable for industry power supply around the world

6. Overloading, over-volt, over-current protections included to ensure 100% safety

7. Accurate designing and advanced device to guarantee synchronous running in each side

8. The Jib crane can be customized as your requirement, such as stop as angle (stop every 10 degree, etc), electric or manual, and so on

Wall Mounted Jib Crane

Wall Mounted Jib Crane

Wall Mounted Jib Crane,Wall Mounted Hoist,Portable Jib Crane Hoist,Wall Mounted Jib Crane Design

Jiangxi Mide Industrial Co., Ltd. , https://www.midecrane.com