A sliding telescopic device for thermal protection and stable water supply of moving platforms

Abstract

The invention discloses a sliding telescopic device for stable water supply for sports platform heat protection, which comprises telescopic water pipes for water supply and water drainage. Each group of telescopic water pipes comprises a first fixed pipe (1), a second fixed pipe (5), a first movable pipe (2), a second movable pipe (4) and a water collecting cavity (9), wherein the first fixed pipe (1) and the second fixed pipe (5) are fixed on the ground (8); the outer end of the first fixed pipe (1) is connected with a main water supply / drainage pipe; the outer end of the second fixed pipe is sealed by using a sealing head; the first movable pipe (2) and the second movable pipe (4) are respectively sleeved inside the first fixed pipe (1) and the second fixed pipe (5) and respectively slide in the first fixed pipe (1) and the second fixed pipe (5); one end of the water collecting cavity (9), the extending end of the first movable pipe (2) and the extending end of the second movable pipe (4) for a three-way structure; and the other end of the water collecting cavity (9) is communicated with a cooling water inlet or outlet of the sports platform (3). The occupied space is small, and water supply is stable.

Description

Technical field [0001] The invention relates to a telescopic device, in particular to a telescopic device of a water supply pipe. Background technique [0002] In high-temperature thermal structure wind tunnels and other occasions, there are many motion mechanisms that require thermal protection, such as model mobile platforms in high-temperature wind tunnels, and movable collector air inlets. The design of the model mobile platform is to achieve a smooth start of the wind tunnel, because the test model needs to enter the thermal assessment area from the side after the wind tunnel is started. In the same way, in order to cooperate with the movement of the test piece, part of the structure of the diffuser (such as the collector port) should also be designed to be movable. In the high temperature environment, the thermal protection of these sports platforms has become an urgent problem to be solved. The thermal protection in the gas flow thermal structure wind tunnel usually adop...

AI Technical Summary

Problems solved by technology

However, after considering the space of the test chamber, water supply pressure, water supply volume and thermal environment, it is found that the metal hose solution is not feasible. There are four specific reasons: 1. The metal hose moves with the moving platform, and the moving platform The large moving range and fast moving speed lead to a large space for the hose, but the space in the test chamber is small, which cannot meet the requirements; 2. The cooling water flow rate is high, the water supply pressure is high, and the metal hose is not easy under high pressure. Bending; 3. The amount of cooling water is large, and it is not easy to meet the required bending degree after the diameter of the metal hose reaches 100mm-200mm; 4. At high temperature, the hose has the risk of being burned

In the process of fast back and forth movement of mobile structures such as model motion platforms, the fluid pressure in the simple single fixed tube telescopic tube changes too much, which will lead to problems such as unstable cooling water supply, so the single fixed tube telescopic tube is not suitable

Images