Tangshan Vehicle-mounted Mobile Toilet
The Tangshan vehicle-mounted mobile toilet is achieved through internal modular modification of large passenger vehicles, with its core lying in the independence and integration of the sewage storage, flushing, and power systems, making it suitable for temporary events or medium- to long-term project scenarios.
Technical Implementation and Core Design
The modification of the vehicle-mounted mobile toilet uses a large passenger vehicle as the carrier, integrating the sanitary unit into the vehicle through modular design. Its technical core is reflected in three aspects:
- Sewage Storage System: It adopts an independent sewage storage tank design, with the capacity matched according to the expected number of users. For example, a scenario serving 500 people per day requires a sewage storage tank with a capacity of 500-800 liters. The sewage storage tank is made of high-density polyethylene or stainless steel, featuring corrosion resistance and leak-proof properties to ensure no leakage risk during long-term use.
- Flushing System: To reduce water consumption and improve cleaning efficiency, pressure-type or vacuum-type flushing technologies are mostly used. Pressure-type flushing pushes water flow through compressed air, requiring only 2-3 liters of water per flush; vacuum-type flushing uses negative pressure to suck up waste, with water consumption as low as 0.5 liters per flush, while also preventing odor diffusion.
- Power System: Power supply is jointly ensured by the vehicle's battery and an auxiliary generator. The battery supports basic lighting and control system operation, while the auxiliary generator (such as a diesel or gasoline generator) is used for high-power-consuming equipment like the flushing system and sewage discharge pump, ensuring normal operation even without an external power source.
Application Scenarios and Performance Constraints
This solution mainly serves two types of scenarios:
- Temporary Large-scale Events: Such as music festivals, markets, and sports events, which require rapid deployment and have a short usage period (usually no more than 7 days). Its advantage lies in its high mobility, allowing it to be relocated with the event venue and avoiding the construction costs of fixed toilets.
- Medium- to Long-term Project Sites: Such as construction sites and exploration camps far from municipal sewage networks, with a usage period of up to several months. In this case, a larger-capacity sewage storage tank (e.g., over 2000 liters) needs to be configured and regularly emptied to meet continuous usage demands.
Performance is constrained by three aspects:
- Sewage Storage Capacity: Insufficient capacity leads to frequent emptying, increasing operational costs; excessive capacity occupies vehicle space and reduces mobility.
- Vehicle Size: Modification needs to be based on the existing size of the passenger vehicle. A vehicle that is too small cannot accommodate a complete sanitary unit, while a vehicle that is too large increases deployment difficulty.
- Ground Conditions: Before deployment, the site's geology needs to be evaluated. Soft ground requires reinforcement to prevent vehicle tipping or sewage pipe breakage.
Maintenance and Deployment Points
Daily maintenance requires regular inspection of three indicators:
- Sewage Storage Tank Liquid Level: Confirmed through a liquid level sensor or manual visual inspection, and emptied in a timely manner when approaching full capacity.
- Flushing System Pressure: Insufficient pressure results in weak flushing, requiring inspection of the air pump or vacuum pump's operating status.
- Sewage Discharge Valve Sealing: Poor sealing can cause odor leakage, requiring replacement of the sealing ring or adjustment of the valve pressure.
Before deployment, it is necessary to plan the emptying route, external power supply interface (if required), and vehicle parking position to ensure safe and efficient operation.
