3 Introduction to R&D management process
3.1 The preliminary preparation for R&D is to tackle this project. At the beginning of 2005, we invested manpower and funds to carry out research, focusing on the research and test of core processes. Up to now, we have mastered technologies such as selection of domestic alloy materials, formulation of hot working process, grinding and grinding methods for this project. During the overall development of the project, we focused on the procurement, assembly and commissioning of precision processing equipment (including hot processing equipment), inspection equipment, etc. through bidding, so as to ensure that test data can be effectively obtained in research and development, comparative tests can be conducted, and equipment quality level can be evaluated. We are also going to start small batch production first, and then carry out on-site practical application. By comparing the data of on-site application with the test data, we propose the control points of core technology, gradually form our own product core technology, and form the competitiveness of products, so as to ensure product quality and provide guarantee for mass product manufacturing.
3.2 Key point of research and development project technology High temperature and high pressure metal seat pneumatic ball valve research and development project is mainly applied to ultra supercritical thermal power generation unit (working medium 30MPa, 600 ℃) boiler, steam turbine body and pipeline drainage system to solve the internal leakage problem of drainage valve under high parameter conditions, achieve energy conservation, reduce costs and promote application in domestic power industry The purpose of creating economic and social benefits. In the process of research and development, through design calculation and test data analysis, we believe that this project belongs to the small precision machinery manufacturing industry project. The key points of the project technology are the selection and inspection of metal materials, hot processing technology, thermal spraying and post processing technology of thermal spraying, surface sealing grinding, etc. These technical key points should be grasped to ensure the success of the project.
3.3 The assessment management objective of the R&D project is to connect the throttle hole in series behind the valve and connect the thermal system by bypass. Under the condition of normal operation of the unit, the valve is opened and closed once a day for 20 consecutive days. If there is no internal leakage, it indicates that the requirements are met. This condition is equivalent to the normal service of the valve on the unit for 4 years.
3.4 Process design and implementation mode of the project scheme: establish a research group and a special organization to take charge of the project; Technical route. The parallel technology route is as follows: material selection and hot working process; Machining and process equipment; Thermal spraying and subsequent processing technology and equipment of thermal spraying; Grinding and equipment of annular spherical seal; Inspection technology; Overall coordination, etc. The parallel technology can speed up the development, improve the technical level of each branch, and ultimately ensure the technical level of the terminal products.
3.5 Control and management of project progress The initial research and development work of the project has been carried out since the beginning of 2005, and 300000 yuan has been invested for sample decomposition and material analysis. In 2006, another 500000 yuan was invested for core process research. The year 2007 is the year for the implementation of key technologies of the project, which mainly includes: completing the construction of the main supporting hardware conditions of the project, and simultaneously completing the preliminary technical appraisal of samples; The sample is tested in the actual industry, and the 4-year service life test is simulated by increasing the switching times; At the beginning of 2008, small batch production conditions were reached.

Petrochemical double-layer pneumatic butterfly valve
Technical category
This product relates to a pneumatic butterfly valve, in particular to an improved double-layer pneumatic butterfly valve for petrochemical industry, which belongs to the technical category of petrochemical industry.
Background technology
Pneumatic butterfly valve is an important component in the connecting pipeline of modern industrial equipment. Pneumatic butterfly valves are used as wire and cable maintenance pipes and civil shower hoses for wires, cables and automatic instrument signals, with specifications ranging from 3mm to 150mm. Pneumatic butterfly valves are widely used in petrochemical industry and other fields. However, the current pneumatic butterfly valves are mostly single-layer corrugated pipe structures that are prone to corrosion in the process of application, and have low compression resistance, reducing the service life; And it has no heat preservation effect. When there is a large temperature gradient change inside and outside the pneumatic butterfly valve, it will accelerate the fatigue problem of the data.
Product content
The purpose of this product is to provide an improved double-layer pneumatic butterfly valve for petrochemical industry to solve the problem of easy corrosion and low compression resistance in the application process proposed in the above background technology.
To accomplish the above purpose, this product provides the following technical plan: an improved petrochemical double-layer pneumatic butterfly valve, including a metal bellows and a mesh sleeve. The outer surface of the metal bellows is fixed with a mesh sleeve. Both ends of the metal bellows are fixed with end rings, and the end ring is fixedly connected with the receiving end, The fixing device at the other end of the receiver is provided with a connecting flange, and the outer surface of the connecting flange is fixedly provided with four device holes.
1. The fixed device at the joint between receiving and connecting flange is equipped with a filter screen.
2. The outer surface of the net sleeve is fixed with several compression rings evenly arranged.
3. The top fixing device of the end ring has a sheath.
4. Mesh sleeve and metal bellows are made of the same data
As a preferred technical plan of this product, the inner wall of the metal bellows is fixed with a corrosion resistant layer, and the surface of the mesh sleeve is fixed with a thermal insulation layer.
Compared with the existing technology, the advantages of this product are:
This product is an improved double-layer pneumatic butterfly valve for petrochemical industry. It is equipped with a double-layer structure of metal bellows and mesh sleeve. The mesh sleeve not only shares the static load of the pneumatic butterfly valve in the axial and radial directions, but also can ensure that the pneumatic butterfly valve works firmly against the ground under the condition that the fluid moves along the pipeline and generates pulsation. At the same time, the mesh sleeve can ensure that the hose ripple is not directly subject to relative friction Mechanical damage such as impact improves the strength of pneumatic butterfly valve; The compression ring can play a good role in compression, avoiding deformation caused by compression of the pneumatic butterfly valve and affecting the use; The connecting flange is arranged to facilitate the stop device of the pneumatic butterfly valve; The set filter screen can play a filtering role to prevent impurities from entering the pneumatic butterfly valve and causing blockage.
Illustration of attached drawings
Figure 1 is the structural representation of the product;
Figure 2 shows the side structure of the connecting flange of this product.
In the figure: 1. Metal bellows; 2. Net sleeve; 3. End ring; 4. Reception; 5. Adapter flange; 6. Device hole; 7. Filter screen; 8. Compression ring; 9. Sheath.
Detailed implementation mode
The attached drawings in the product practice will be separated below, and the technical plan in the product practice will be clearly and completely described. Obviously, the described practice is only a part of the practice of the product, not all of the practice. Based on the examples in this product, all examples obtained by skilled ordinary technicians without inventive labor belong to the scope of this product maintenance.
Please refer to Figure 1-2. This product provides an improved petrochemical double-layer pneumatic butterfly valve, including a metal bellows 1 and a mesh sleeve 2. The outer fixing sleeve of the metal bellows 1 is provided with a mesh sleeve 2. Both ends of the metal bellows 1 are fixed with an end ring 3, which is fixedly connected with one end of the receiver 4, and the other end of the receiver 4 is fixed with a connecting flange 5, The outer surface of the connecting flange 5 is fixedly provided with four device holes 6.
1. The fixing device at the junction of receiver 4 and connecting flange 5 is equipped with a filter screen 7, which plays the role of preliminary filtration.
2. The outer surface of the net sleeve 2 is fixed with a number of compression rings 8 that are evenly set, and the compression ring 8 can play a good role in compression.
3. The top fixing device of end ring 3 is provided with a sheath 9 to protect end ring 3.
7. The mesh sleeve 2 and the metal bellows 1 are made of the same materials, so that the strength of the mesh sleeve 2 and the metal bellows 1 are the same, improving the service life.
5. The inner wall of metal bellows 1 is fixed with a corrosion resistant layer, and the surface of mesh sleeve 2 is fixed with a thermal insulation layer. The corrosion resistant layer improves the corrosion resistance, thus improving the service life; The insulation layer plays the role of heat preservation and insulation, and can deal with the problem that the change of large temperature gradient will accelerate the fatigue of data.
During detailed application, this product is an improved double-layer pneumatic butterfly valve for petrochemical industry. It stops the pneumatic butterfly valve through the device hole 6 on the outside of the connecting flange 5. When the liquid enters, the filter screen 7 plays a filtering role to avoid the blockage of the pneumatic butterfly valve caused by impurities entering. The corrosion resistant layer of the inner wall device of the metal bellows 1 improves the corrosion resistance and service life, The thermal insulation layer of the surface device of the mesh sleeve 2 plays the role of thermal insulation, and can deal with the problem that the change of larger temperature gradient will accelerate the fatigue of the data; The mesh sleeve 2 not only shares the static load of the pneumatic butterfly valve in the axial and radial directions, but also can ensure that the pneumatic butterfly valve can work reliably under the condition that the fluid moves along the pipeline with pulsating effect. At the same time, the mesh sleeve 2 can also ensure that the corrugated part of the pneumatic butterfly valve is not directly subject to mechanical damage such as relative friction and impact; Through the compression ring 8, it can play a good role in compression, avoiding the deformation caused by the compression of the pneumatic butterfly valve affecting the use.
In the description of this product, it is necessary to understand that the indicated orientation or position relationship is based on the orientation or position relationship shown in the attached figure, which is only for the convenience of describing this product and simplifying the description, rather than indicating or implying that the installation or element referred to has a specific orientation, a specific orientation structure and operation.
In this product, unless otherwise clear rules and restrictions, for example, it can be fixed connection, detachable connection, or integrated; It can be mechanical connection or electrical connection; It can be directly connected, or indirectly connected through intermediate media. It can be the internal connection of two components or the interaction between two components. Unless otherwise clearly defined, ordinary technicians with skills can understand the detailed meaning of the above words in this product according to the detailed situation.
Although the embodiments of this product have been shown and described, ordinary technicians with skills can understand that they can make various changes, amendments, exchanges and modifications to these embodiments without departing from the principle and spirit of this product, and the scope of this product is limited by the appended claims and their equivalents.