Building cold and heat direct supply system and blocking device

Abstract

The invention discloses a building cold and heat direct supply system and a blocking device. According to the cold and heat direct supply system, the blocking device is arranged between a backflow pipeline and a one-time backflow pipeline of coolants / heating media. The blocking device comprises a tank body with a water inlet and a water outlet, a partition plate is arranged in the tank body to divide an inner cavity of the tank body into a high pressure area and a low pressure area, and the water inlet and the water outlet are placed in the high pressure area and the low pressure area respectively. A piston cylinder is arranged at the low pressure area end of the tank body. One end of a connecting rod is connected with a drive piston in the piston cylinder, the other end of the connecting rod is connected with a conical body I arranged in the high pressure area of the tank body, and the partition plate is provided with a conical pressure reducing flow limiting opening matched with the conical body I. The piston cylinder is provided with a high pressure drive water opening communicated with a piston cavity of the piston cylinder, a pressure adjusting device is arranged on the upper portion of the piston cylinder corresponding to the high pressure drive water opening, and the high pressure drive water opening is communicated with a pipeline of the outlet end of a booster pump. According to the building cold and heat direct supply system and the blocking device, hydraulic control linear adjusting reliability is high.

Description

technical field [0001] The invention relates to a building cooling and heating direct supply system which can simultaneously supply cooling / heating to high-rise buildings and low-rise buildings through a set of units. The invention also relates to a blocker used in the direct cooling and heating supply system of the building. Background technique [0002] At present, with the development of the real estate industry, a large number of high-rise buildings have appeared, and the heating problem of high-rise buildings is a problem that needs attention. In order to realize the heating of high-rise buildings and low-rise buildings at the same time, the method used in the past is to set up a separate boiler for high-rise buildings or to isolate the heat exchanger from the low-level system. However, the former has a large initial investment and high operating costs, and the latter must It is economical and reasonable to have steam or high temperature water heat source. The most ec...

AI Technical Summary

Problems solved by technology

However, these methods in the prior art have defects such as complex system structure and poor stability.

[0003] Since the pressure reducing valves currently on the market are not specially designed for direct-connected heating systems, some performance parameters are not completely suitable for heating systems. The main problems are unsatisfactory shut-off effect, lack of exhaust function, unreliable shut-off due to sudden power failure, etc. Defects, and they also have disadvantages such as complex structure, troublesome production, rubber wear on the flow surface and high price

In addition, most of the existing direct-connected heating units have a low degree of automation, do not have the function of real-time linear pressure regulation, and cannot be adjusted in real time according to the user's heating situation

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