Mobile Public Toilet Connection Diagram
Currently, there is no standard diagram or unified specification directly targeting the 'mobile public toilet connection diagram', but a general description can be provided based on its structural characteristics and common connection methods. The connection design of mobile public toilets needs to incorporate the sewage system, water supply system, and the connection of intelligent devices that may be involved. It can be specifically divided into the following three types of scenarios:
1. Basic Sewage and Water Supply Pipeline Connections
The sewage pipelines of mobile toilets usually adopt PVC or HDPE materials. Depending on the on-site terrain, a direct discharge or fecal storage tank mode should be selected. For direct discharge, ensure that the slope of the sewage pipeline is ≥2% (i.e., a drop of 2 centimeters per meter) to prevent blockages. For the fecal storage tank mode, a sludge extraction port should be reserved and equipped with a sealed cover to prevent odor leakage. The water supply pipeline should be installed with a check valve to prevent sewage from flowing back into the water source. It is also recommended to use hose connections for easy disassembly and maintenance. For example, the water inlet of some mobile toilets is designed as a quick connector, which is connected to the municipal water supply pipeline or water storage tank through threaded or snap-fit interfaces. During operation, ensure that the sealing ring is intact to prevent water leakage.
2. Connection Methods for Intelligent Devices
The smart public toilet system may involve the networking of sensors, controllers, and other devices, with connection methods divided into wired and wireless categories. Wired connections usually adopt the RS485 bus, which connects devices such as temperature and humidity sensors and pedestrian flow counters to the main control box through twisted-pair cables. The transmission distance can reach 1.2 kilometers, suitable for fixed mobile toilets. Wireless connections rely on LoRa technology, which enables communication between devices and the cloud platform through a low-power wide-area network without the need for wiring. However, a LoRa gateway needs to be installed inside the toilet to ensure signal coverage. For example, the ammonia sensor of a certain brand of mobile toilet uploads data to the cloud through a LoRa module, allowing managers to monitor air quality in real-time via a mobile app.
3. Connection Adjustments for Special Scenarios
In high-altitude or cold regions, the connections of mobile toilets need to additionally consider freeze protection and air pressure issues. For example, some mobile toilets in Tibet use electric tracing bands to wrap the sewage pipelines to prevent freezing at low temperatures. In areas with an altitude exceeding 3,000 meters, the sealing structure of the fecal storage tank needs to be adjusted to avoid difficulties in sludge extraction due to air pressure differences. In addition, the grounding wire of the mobile toilet should be independently buried to avoid crossing with the sewage pipeline and prevent corrosion.
