Congratulations to DINGSHENG for obtaining the utility model patent certificate
Date:Feb 18th, 2022
Recently, "A steam vacuum pump with high exhaust gas absorption efficiency" independently developed by our company has obtained the utility model patent certificate issued by the State Intellectual Property Office of the People's Republic of China. Patent number: ZL 2019 2 2236778.3. The steam jet vacuum pump has a large pumping capacity and a wide working range. It is mainly used in degassing, decolorization, drying, deodorization, distillation, refrigeration and transportation. Compared with mechanical vacuum oil pump, it shows excellent advantages in polyester production, material concentration containing organic solvent, etc.
The working principle and structure of the jet vacuum pump:
The steam jet vacuum pump uses the aerodynamic principle of the mutual conversion of static pressure energy and kinetic energy during fluid flow to form a vacuum. The water vapor with a certain pressure reaches the speed of sound when it passes through the throat of the Laval nozzle. When it reaches the diffuser of the nozzle, the static pressure energy is completely converted into kinetic energy and reaches the supersonic speed. At the same time, a vacuum is formed at the nozzle outlet, and the pumped gas is under the action of pressure difference, is sucked into the suction chamber, mixed with supersonic steam while entering the Venturi tube, and then discharged from the venturi diffuser at subsonic speed, while the speed of the mixed gas gradually decreases, the pressure increases, and then from the discharge port discharge.
If several jet pumps are used in series, and a condenser is added between the pumps to condense the steam, a higher degree of vacuum can be obtained. The whole steam jet vacuum pump consists of several stages of pump body and condenser. The pump bodies at all levels are composed of nozzles, inlet chambers and diffusers. The nozzles can be single or multiple. The nozzles are generally made of stainless steel. Other components such as the suction chamber and diffuser can be made of stainless steel, cast iron and carbon steel and other materials.
The internal components of jet vacuum pump are mainly composed of Laval nozzle and diffuser. Its working process can be divided into three stages: adiabatic expansion stage, mixing stage, compression stage. In the adiabatic expansion stage, after the working steam passes through the scaling nozzle, the pressure energy is converted into velocity energy, and enters the diffuser at a very high speed. At the same time, the pressure of the working steam drops at the nozzle outlet, forming a vacuum to suck the pumped gas;
In the mixing stage, the pumped gas enters the diffuser. In the diffuser, the steam and the pumped gas collide and mix to exchange energy, and the mixing is completed at the throat of the diffuser, and the two gases reach the same speed;
In the compression stage, after passing through the throat of the diffuser, the velocity of the mixed gas decreases, and the pressure further rises. At the outlet of the diffuser, it reaches the atmospheric pressure or the inlet pressure of the next-stage ejector, and the pumped gas is discharged.
“Dingsheng Machinery” is committed to providing complete sets of oil processing equipment, oil pretreatment equipment, oil leaching equipment, and oil refining equipment. With the strong support of the company's leaders, the R&D center continuously explores own advantages, develops new products, new technologies processes, and gradually improves technological innovation projects. The patent for utility model technology is not only the crystallization of the hard work of our company's R&D personnel, but also the display of the company's scientific research and innovation strength. The acquisition of the patent certificate further enhances the core competitiveness of the company and provides a strong scientific and technological support for the rapid development of the company.
The working principle and structure of the jet vacuum pump:
The steam jet vacuum pump uses the aerodynamic principle of the mutual conversion of static pressure energy and kinetic energy during fluid flow to form a vacuum. The water vapor with a certain pressure reaches the speed of sound when it passes through the throat of the Laval nozzle. When it reaches the diffuser of the nozzle, the static pressure energy is completely converted into kinetic energy and reaches the supersonic speed. At the same time, a vacuum is formed at the nozzle outlet, and the pumped gas is under the action of pressure difference, is sucked into the suction chamber, mixed with supersonic steam while entering the Venturi tube, and then discharged from the venturi diffuser at subsonic speed, while the speed of the mixed gas gradually decreases, the pressure increases, and then from the discharge port discharge.
If several jet pumps are used in series, and a condenser is added between the pumps to condense the steam, a higher degree of vacuum can be obtained. The whole steam jet vacuum pump consists of several stages of pump body and condenser. The pump bodies at all levels are composed of nozzles, inlet chambers and diffusers. The nozzles can be single or multiple. The nozzles are generally made of stainless steel. Other components such as the suction chamber and diffuser can be made of stainless steel, cast iron and carbon steel and other materials.
The internal components of jet vacuum pump are mainly composed of Laval nozzle and diffuser. Its working process can be divided into three stages: adiabatic expansion stage, mixing stage, compression stage. In the adiabatic expansion stage, after the working steam passes through the scaling nozzle, the pressure energy is converted into velocity energy, and enters the diffuser at a very high speed. At the same time, the pressure of the working steam drops at the nozzle outlet, forming a vacuum to suck the pumped gas;
In the mixing stage, the pumped gas enters the diffuser. In the diffuser, the steam and the pumped gas collide and mix to exchange energy, and the mixing is completed at the throat of the diffuser, and the two gases reach the same speed;
In the compression stage, after passing through the throat of the diffuser, the velocity of the mixed gas decreases, and the pressure further rises. At the outlet of the diffuser, it reaches the atmospheric pressure or the inlet pressure of the next-stage ejector, and the pumped gas is discharged.
“Dingsheng Machinery” is committed to providing complete sets of oil processing equipment, oil pretreatment equipment, oil leaching equipment, and oil refining equipment. With the strong support of the company's leaders, the R&D center continuously explores own advantages, develops new products, new technologies processes, and gradually improves technological innovation projects. The patent for utility model technology is not only the crystallization of the hard work of our company's R&D personnel, but also the display of the company's scientific research and innovation strength. The acquisition of the patent certificate further enhances the core competitiveness of the company and provides a strong scientific and technological support for the rapid development of the company.
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