The 2nd China Heating Academic Annual Meeting co-sponsored by the Technical Committee of China Urban Heating Association and District Heating Forum
The 2nd China Heating Academic Annual Conference co-sponsored by the Technical Committee of China Urban Heating Association and "Regional Heating" magazine Co., Ltd. was successfully concluded! A total of 20 special sub-forums were held at the annual meeting. Not only did more than 100 outstanding paper authors stage speeches, but more than 30 well-known experts in the heating industry will host the guests. Hebei Tongli Automatic Control Valve Manufacturing Co., Ltd., as a support unit of the China Urban Heating Association, opened a special lecture on water balance and smart heating on the afternoon of the 27th. The special meeting was won by the Chief Engineer of China Municipal Engineering North China Design and Research Institute Co., Ltd. Chen Liang, chief engineer of Huaihe and China Municipal Northwest Design and Research Institute, presided over!
The seminar on smart heating is divided into five parts: 1. R&D and application of spherical balance valve; 2. Design and application of intelligent valve under the premise of intelligent heating; 3. Heating inlet device for heating pipe network R & D and application; 4. Hydraulic balance courseware handmade; 5. Interaction and lottery links.
"Development and Application of Ball Balance Valve"
The ball balance valve is another energy-saving product developed by Hebei Tongli, which can be connected to the intelligent flow meter for online debugging. It has the functions of shut-off, adjustment, measurement and lock control. Its unique lock control function can prevent others from changing the opening degree and maintain the debugging results. It can be directly welded to the pipeline to save material resources such as flanges, bolts and gaskets. It is small in size, light in weight, easy to install and easy to keep warm. It has the advantages of maintenance-free, zero leakage, low operating cost, etc., and it has become an alternative to regulating valves such as digital lock balance valves and T40 type control valves.
The design of the percentage curve of the ball-type balance valve W port is the most important part of the valve adjustability. The design basis of the V-shaped and W-shaped parts of the valve port is the key to the valve adjustability. Each caliber is designed according to the actual application to design the V-shaped angle and length to ensure the adjustment accuracy during remote control.
Design, Application and Discussion of Smart Valves under the Premise of Smart Heating
Wisdom heating must not only have a clever brain, but also have sound limbs. The wisdom valve is the executor of the brain, and the limbs are not able to provide wisdom for heating.
1. The intelligent valve should be an independent adjustment unit, which is the guarantee of intelligent heating: The adjustment of each valve must not affect the pressure and flow of other users, the temperature changes, and the smart valve keeps the standby state without changing the command. In the smart valve system, the data is transmitted and transmitted within the specified time without affecting the system, and the system becomes simple and feasible. If the mutual interference program software of each valve is too large, it will not be able to stop the valve after it has been adjusted to the target. If tens of thousands and hundreds of thousands of valve actuators are kept in balance, it is unthinkable, and for several years. The maintenance and life of the rear smart valve will also face enormous challenges.
2, the adjustment accuracy of the smart valve is the key to the success of intelligent heating: the adjustment accuracy of the smart valve needs to be analyzed from the valve weight of the valve. The higher the valve authority, the better the control performance and the higher the adjustment accuracy. When the valve weight is less than 10%, the actuator of the smart valve repeatedly performs switching control in the small opening range. Frequent movements will cause damage to the actuator, and the energy saving gain will not be as expected.
Development and Application of Thermal Inlet Device for Heating Pipe Network
The steel welding heat inlet integrated device is prefabricated in the factory to realize the integration of heat inlet device shut-off, observation, sewage, heat preservation and control, saving cost, simplifying installation, shortening construction time, and avoiding the attachment of temperature and pressure measuring devices. Easy to keep warm, easy to drain and long service life.
The steel welding heat inlet integrated device eliminates 70% of the flanges, bolts and gaskets of the connecting parts. The construction uses a welded structure, which can reduce construction costs by 80%. Reduce the construction period by 80%. The product adopts automatic control valve parts, which completely solves the hydraulic imbalance and can save 15-20% of heating energy consumption. The design life is 30 years, and the life is the same as the pipeline. After the user uses the product, the entire investment can be recovered in the current year.
Hydraulic balance courseware manual work
DN50 caliber valve, when the flow rate is 3m3/h, the hole diameter is 11.28mm under the pressure difference of 10m, the hole diameter is 20.07mm under the pressure difference of 1m, that is, the hole diameter of 11.28mm under the pressure difference of 10m, and 20.07mm under the pressure difference of 1m The aperture can meet the flow demand of more than 1000 m2 heating users.
On-site experts and leaders have expressed that after the manual operation of the hydraulic balance courseware, it is more difficult to understand the effect of the adjustment accuracy of the valve on the flow control and the adjustment of the hydraulic balance of the secondary network. It will promote the future heating work!
Finally, the lucky draw: Jin Zaoquan intelligent magnetic control electric teapot · double furnace (10), selected by Chen Liang, chief engineer of China Municipal Northwest Design and Research Institute, and Mali, general manager of Hebei Tongli Company; special prize: smart toilet (1), was selected by Wang Huai, chief engineer of China Municipal Engineering North China Design and Research Institute Co., Ltd., and Jia Lihua, a senior engineer of Beijing Haotei Pipeline Equipment Co., Ltd., supervised the opening of the prize. During the lottery, the atmosphere was warm and the mood was high!
The hydraulic balance and wisdom heating seminar of Hebei Tongli Automatic Control Valve Manufacturing Co., Ltd. was successfully completed. Thanks to the platform provided by China Urban Heating Association, we can share the heating technology with you. Thanks to Wang Huai and Chen Liang. The support of an expert teacher and the thanks to every leader present!
In the end, Marley said that Hebei Tongli Company is willing to take advantage of the technology precipitation advantages of the heating valve for 20 years, and research and develop the timely and practical heating products to serve the heating business, and contribute to the energy saving and emission reduction of the heating industry.