Dec 05, 2024
A combination valve is a key component in a locomotive brake system. It typically consists of multiple valves and channels, serving to perform various braking functions. These functions include, but are not limited to, emergency braking, regular braking, release braking, and fault diagnosis. Through precise control of the combination valve, stable and reliable braking performance can be ensured while the locomotive is in operation.
The composition of a locomotive brake device combination valve is quite complex, involving the cooperation of multiple subsystems and valve bodies. It incorporates technologies such as pneumatic control and mechanical linkage. The system generally consists of the main valve body, pressure regulating valve, solenoid valve, manual valve, exhaust valve, pneumatic pipelines, and supporting connectors.
A customer from the Americas approached us with a design diagram of a combination valve. They have conducted an inspection and upgrade of some internal hardware components, and thus need to replace some outdated valves, pipes, and brake systems.
They have outlined the following requirements for the new brake system:
◆ It must meet the required air pressure and flow rate for braking.
◆ It should be able to achieve quick and stable braking performance.
◆ The overall dimensions should not change significantly.
◆ The valve body must be stable and reliable, capable of adapting to variable working environments and complex operational requirements.
To achieve precise and rapid braking functionality, various valve components must work together through complex mechanical structures and pneumatic systems. Adhering to the principles of precision and integration, Fescolo adopts a manifold-like design approach to create a combination valve plate.
The combination valve plate is made of two valve plates that are connected by mounting holes and screws. Various seals are built into the plates to minimize or prevent gas leakage, ensuring airtightness.
Complex pneumatic channels are set between the two combination valve plates, used for pneumatic transmission and to pneumatically connect the various modules.
To control the opening and closing of the air circuit and regulate internal pressure, various valves such as pressure regulating valves, solenoid valves, manual valves, and air reservoirs are required. To facilitate installation and replacement, our engineers have designed each valve body as a separate module.
These modules incorporate different pneumatic components and have various internal structures to perform distinct functions. However, their installation dimensions are standardized, which means you can switch between manual, pneumatic, and electrical control methods by simply replacing the modules.
In the event of a malfunction in one module, it can be replaced individually without altering the main structure.
Furthermore, the valve plate is designed with reserved module interfaces for adding external components such as pressure switches, pressure gauge or pressure sensors, allowing for enhanced functionality in the future.
The final prototype produced is as follows:
After manufacturing a complete set of brake valve prototypes, we conduct a full range of tests, including airtightness tests, operating pressure tests, static characteristic tests, and activation pressure tests. This ensures the product meets design standards and can function correctly under various working conditions.
With years of experience in the pneumatic field, Fokca (Fescolo) specializes in customizing pneumatic components for customers. Our technical team, through a deep understanding of customer requirements and extensive expertise in the pneumatic industry, provides creative solutions and is dedicated to offering tailored products and solutions.
You can explore more of our customer cases. If you need further assistance, please feel free to contact us.
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