On-site investigation before installation of push-pull green plate: wall, track, heat dissipation and maintenance space

Before the equipment arrives, site conditions will determine whether the project can be successfully implemented.

Problems with pull-and-slide greenboard projects rarely stem from the product itself being substandard. More often, the problem lies in the fact that the site conditions are not in line with the equipment requirements: the wall is not loaded enough, and the green plate starts to loosen after being installed for half a year; The track is not leveled, and the sliding plate will jam and shift after a period of time. After the green plate is closed, the vent of the interactive flat plate is covered, and OPS frequently drops frequency in summer. The platform or door blocks the sliding direction and the teacher cannot push in class, it is not accessible after closing.

These problems have one thing in common-they could have been discovered before the equipment arrived. The on-site investigation is not a formality, nor is it the end of measuring the width of the wall with a tape measure. It should be a systematic condition check, confirming clearly the five contents of wall and load bearing, track and sliding, heat dissipation and ventilation, maintenance and overhaul, power supply and network, and leaving written records and image data. This record is not only the basis for the installation plan, but also the basis for subsequent acceptance and division of responsibilities.

Push-pull green board and interactive tablet together constitute a teaching wall system. The outer writing board slides left and right, forming a complete blackboard writing area when closed, and exposing the middle interactive tablet when pushed open. Any deviation in the size, structure or installation conditions of any link will affect the long-term stable use of the whole wall. This is also why on-site surveys should be treated according to the system, instead of treating the green board as a blackboard that can be hung on the wall.

1. Walls and Load-Bearing: Can Green Slab Be Securely Fixed

The wall is the stress foundation of the whole teaching wall. The weight of the push-pull green plate is not only the fixed plate itself, but also the sliding plate, frame, track, interactive plate, OPS and various peripherals. Dynamic loads are also generated during the sliding process. Whether the walls can bear these loads directly affects the safety of use.

Wall information to be confirmed

First of all, it is necessary to find out the type of wall: load-bearing wall, hollow brick wall, lightweight partition wall, gypsum board wall, or steel structure wall. The fixing methods and carrying capacity of different types of walls vary greatly. Secondly, to confirm the wall thickness, material and surface state, check whether the wall is flat, whether there are cracks, water seepage, empty drum or fall off. Whether there is a hidden pipeline at the drilling position needs to be checked in advance with a wall detector to avoid hitting wires or water pipes. If the wall conditions do not meet the installation requirements, but also to determine whether the need for reinforcement, or switch to other options such as floor brackets.

Bearing Verification

The weight of the whole teaching wall needs to be calculated clearly for load-bearing verification: total weight of green board, weight of interactive board, weight of OPS and peripheral equipment, weight of track and frame. In addition to these static weights, the dynamic load generated when the sliding plate is opened and closed is also considered. Whether the wall can bear, need to have the corresponding ability of professional judgment and issued a written opinion. If it is confirmed that reinforcement is needed, it is necessary to further clarify who will issue the reinforcement plan, who will construct it and who will bear the cost. If these three things are not clearly written in the contract, it is easy to wrangle during the construction phase.

Exploration items related to QM-HL4200

The length of the whole board of the QM-HL4200 teaching writing board shall not be less than 4000mm. During the survey, it shall be confirmed whether the available width of the wall surface is sufficient and whether it conflicts with the door frame, platform or corner after installation. The specification of transom shall not be less than 57mm × 78mm, and the specification of vertical frame shall not be less than 29mm × 100mm. The thickness and width actually occupied after installation shall be checked in advance. The service life of the pulley is not less than 100000 times, which puts forward higher requirements for track installation accuracy and wall stability-once the wall is slightly settled or loose, the cooperation between the pulley and the track will be affected. The product uses a lock to lock the sliding blackboard. The key is universal. During the survey, it is also necessary to confirm that the lock position is still convenient for teachers to operate after installation.

2. track and sliding: whether the green board can be used smoothly

The track levelness, sliding direction and limit design determine the experience of the green board in daily use. Once the track is not horizontal, the sliding plate will be biased to one side. As time goes by, the pulley will wear out, the noise will become larger, and even the jam will occur.

Orbital verification

It is necessary to confirm whether the track type is upper rail, lower rail or combined form, whether the track length and installation position match the wall surface and green board size, whether the track is horizontal, vertical or meets the design requirements, whether it is stable without looseness, and whether it matches the green board frame. The QM-HL4200 adopts a hidden sliding system on the track. During the survey, it is also necessary to confirm that dust and debris will not enter the track, so as to avoid the sliding structure from being affected by dust.

Sliding Verification

It is necessary to confirm the number, width and sliding stroke of the movable board, whether the sliding direction is left and right, up and down or combined, whether the sliding is smooth, whether there is damping or limit, whether the sliding blocks the platform, door or passage, whether it affects the operation of teachers or the sight of students, and whether the sliding noise is within the acceptable range. These problems are best measured in the field with tape and level, rather than judged by feeling.

Security Verification

Whether the movable plate is anti-derailment and anti-pinching, whether limit gears are installed on both sides of the inner side of the transom, whether the sliding plate can hit the vertical frame and clamp hands during pushing and pulling, whether the movable plate can be fixed or locked, whether there is a safety gap between the green plate and the flat plate, and whether students or teachers may be pinched during sliding. The QM-HL4200 pulley is a double-group high-precision bearing upper hanging wheel with lower horizontal sliding system, which is evenly installed up and down. Accurate front and rear positioning shall be ensured during installation to avoid dislocation of the sliding plate in the closed state.

3. heat dissipation, ventilation and maintenance space: whether the interactive flat plate can operate stably for a long time

After the green plate is closed, the heat dissipation and maintenance space of the interactive flat plate are most easily ignored. The equipment of many projects was operating normally during the acceptance. It was only in summer that OPS crashed frequently. When it was opened, the vents were tightly blocked by green plates.

Heat dissipation and ventilation verification

It is necessary to confirm the position and number of heat dissipation ports of the interactive flat plate, the heat dissipation requirements of OPS, whether the green plate covers the air vents after closing, whether there is a ventilation gap between the green plate and the flat plate, whether additional heat dissipation or ventilation design is required, and whether there are problems of heat source, direct sunlight or poor ventilation in the classroom. The specific clearance value shall be confirmed according to the installation requirements of the interactive panel manufacturer, and no uniform standard shall be applied.

Inspection of repair and maintenance space

It is necessary to confirm whether there is an inspection space between the green plate and the flat plate, whether the OPS can be easily inspected, replaced or upgraded, whether the cable can be inspected, maintained or replaced, whether the sliding of the green plate affects the inspection operation, whether it is necessary to reserve the inspection door or The movable plate, track and pulley are easy to clean and replace. A transparent protective film is attached to the QM-HL4200 board surface, and it should be confirmed whether it is easy to clean after installation. The frame is equipped with a multi-purpose groove with a width of not less than 30mm, which is separated from the sliding system. It can be used to place teaching aids such as writing pens and pointers, and is also convenient for centralized dust treatment. During investigation, it can be confirmed whether the position of the multi-purpose groove affects the routing and daily use. A lock locks the sliding blackboard. Whether it is convenient to unlock and operate during maintenance also needs to be confirmed on site.

Maintenance process recommendations

After the installation is completed, it is recommended that the school or the operation and maintenance party regularly check the sliding status of the green board and the track, regularly check the OPS heat dissipation and air vents, regularly check the cables and interfaces, regularly clean the green board and the track, and record the maintenance and fault handling. It is more cost-effective to solidify these actions into a periodic table than to temporarily find someone to deal with problems.

4. Power and Network: The Invisible Foundation of the Teaching Wall System

Power and network are often put in the last consideration, but they are the premise of interactive tablet, OPS, video booth, recording and broadcasting equipment can work properly. If the survey stage is not confirmed, the installation stage will need to re-slot and pull the wire, which will affect both the progress and the appearance.

Power supply verification

It is necessary to confirm the power supply requirements of interactive tablets, OPS, video booths, recording and broadcasting equipment, the location, quantity and height of power sockets, whether new lines or sockets need to be modified, whether the cable path is hidden, safe and easy to maintain, and whether leakage protection, grounding and lightning protection measures are equipped. Special attention should be paid to whether the power socket or network panel will be blocked after the green board is closed, and whether the lock position will affect the operation of the power switch.

Network Verification

It is necessary to confirm whether the network access mode is wired, wireless or dual-channel, the location and number of network ports, the requirements of screen projection, recording and broadcasting, and distance teaching for network bandwidth and stability, whether new switches, AP or wiring are needed, and whether the cable identification is clear to facilitate later maintenance. The QM-HL4200 frame multi-purpose slot can be used to route or place teaching aids, but it cannot affect the sliding system, which should be considered in advance in the wiring scheme.

List of 5. Site Investigation and Division of Responsibilities

The results of the on-site investigation must fall on paper before they can become the basis for the installation plan and the standard for subsequent acceptance. The following are the main items that need to be confirmed during the survey.

Site investigation tools and recording methods

For site investigation, it is recommended to carry a tape measure or laser rangefinder to measure wall width, height and track length. Level ruler or laser level meter to measure track levelness; Wall detector to check hidden pipelines and steel bars; Camera or mobile phone is used to photograph walls, corners, platforms, doors, passages, power sockets and net openings. The on-site record form shall be filled in on the spot, marking the problem points and items to be confirmed. The photo naming suggestion is unified as "classroom number + exploration item + date" to facilitate filing and subsequent search.

Allocation of responsibilities

Every problem found in the on-site investigation needs to be clearly defined who is responsible for solving it. The following table can be used as a reference for the division of responsibilities.

Frequently Asked Questions

Why do you do on-site investigation before the installation of push-pull green board? Because any mismatch between wall, track, heat dissipation, maintenance and power supply network will become rework and addition after installation, and even affect the normal teaching use.

What if the wall is a light partition wall? It needs to be judged by professionals whether it needs to be reinforced or switched to a floor bracket. The reinforcement scheme, construction party and cost-bearing party shall be specified in the contract.

Does the track not level affect the use? Will. The track is not horizontal will cause the sliding plate to shift, jam, noise increase, long-term use will increase the pulley wear. The installation should be measured with a level or laser level.

What should I do if the green plate is closed to cover the OPS heat dissipation port? It is necessary to confirm the position of the heat dissipation port and the ventilation gap in the investigation stage, and adjust the installation position or increase the ventilation design if necessary. The specific clearance shall be confirmed according to the requirements of the interactive panel manufacturer.

How much maintenance space should be left between the green plate and the flat plate? There is no uniform value, which should be determined according to the type of interactive flat plate, OPS replacement method and site conditions. The principle is the ability to easily inspect, clean and replace parts.

The interactive flat plate has been installed. Can you add a push-pull green plate? Yes, but the opening size, installation method and heat dissipation space need to be reconfirmed according to the actual model. It cannot be directly applied according to the standard size.

The site survey found that the wall is unqualified, how to deal with the contract change? It is recommended to agree in advance in the contract to change the process, cost commitment and duration adjustment methods to avoid disputes during the construction phase.

How do integrators, engineers, suppliers and schools divide their responsibilities? Refer to the division of responsibilities above, and specify the lead, partner and deliverables in the contract.

How to maintain the push-pull green board after installation? It is recommended to check the track and sliding state, OPS heat dissipation and air vent, cables and interfaces regularly, clean the green board and track regularly, and record the maintenance and fault handling.

The life of the QM-HL4200 pulley is not less than 100000 times. What should be paid attention to during installation? Ensure that the track is level, the wall is stable, and the upper and lower pulleys are evenly stressed to avoid local wear and tear of pulleys due to installation deviation.

A lock key is universal, how to check and accept after installation? On-site test whether the lock can reliably lock the sliding blackboard, whether the keys of many classrooms are universal, and whether the position of the lock is convenient for teachers to operate.

Conclusion

Before the installation of the push-pull green board, the on-site investigation determines whether the project can be successfully landed. Integrators and engineers should confirm the five conditions of wall, track, heat dissipation, maintenance space and power supply network, and convert the survey results into the project items and contract attachments that can be verified. The cost of pre-fitting, cooling and servicing before installation is much lower than reworking or adding items after arrival. For the school, a complete on-site investigation record is also an important basis for subsequent acceptance, asset transfer and daily maintenance.