Public information websites of institutions, enterprises and institutions in Chongqing have been frequently attacked recently. Viruses created by cyber hackers called “botnets†have caused the homepages of these websites to be altered, black screens or important information hidden. The Chongqing Public Security Network Supervision Department pointed out that public information websites of government agencies, enterprises and institutions should be regularly updated with patches and firewalls.
According to statistics from the Network Supervision Corps of the Chongqing Public Security Bureau, there were 74 cyberattacks in Chongqing last year, and the police intercepted more than 230,000 viruses. Since January this year, there have been at least 30 cases in which the portals of government agencies and institutions have been attacked, seriously affecting normal work. Police sources pointed out that the current “hackers†have shifted from showing their personal abilities and technologies in the past to gaining economic benefits or stealing money from others. It is necessary to raise awareness of prevention. Now the government agencies and institutions have set up their own public information websites. It is better to have someone to manage them, and to upgrade anti-virus and anti-virus software frequently. Once a network security incident occurs, report to the police as soon as possible.
As
the name suggests, diaphragm metering pump using a special design and
processing of flexible diaphragm instead of the piston, under the action
of the drive mechanism to achieve reciprocating motion, complete the
suction - discharge process. Due
to the segregation of the diaphragm, the isolation between the metering
fluid and the driving lubrication mechanism is realized in the
structure. High-tech structural design and the selection of new materials has
greatly improved the service life of the diaphragm, coupled with
excellent corrosion resistance of composite materials, diaphragm
metering pumps become the main application of fluid measurement pump
type.
In
the diaphragm-type metering pump family members, the hydraulic
diaphragm metering pump as a result of the use of hydraulic oil evenly
drive the diaphragm, to overcome the mechanical direct drive mode under
the pump diaphragm too concentrated shortcomings, to enhance the
diaphragm life and working pressure ceiling. In
order to overcome the single diaphragm metering pump may occur due to
damage caused by the diaphragm damage, and some metering pumps equipped
with a diaphragm breakage sensor to achieve the diaphragm when the
automatic chain protection; with double diaphragm structure of the pump
head to further improve its safety Sex, suitable for security protection is particularly sensitive to the application.
As a kind of diaphragm type metering pump, the electromagnetic driven
metering pump generates the pulsating driving force with the
electromagnet, which saves the motor and the speed change mechanism,
makes the system compact and compact, it is an important branch of the
small range low pressure metering pump.
Precision metering pump technology has been very mature, the fluid metering capacity of up to 0-100,000l / h, working pressure up to 4000bar, the scope of work covers all areas of industrial production requirements.
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