45results about How to "Block communication" patented technology

The invention discloses a network locking method of a mobile terminal. The network locking method comprises the following steps of: internally installing an encrypting chip in a mobile terminal, and storing customized information to a user identity module (SIM) card, the encrypting chip and a mobile terminal main chip respectively; and respectively comparing the customized information by the encrypting chip, the mobile terminal main chip and the SIM card after the mobile terminal is started, and blocking communications between the mobile terminal main chip and the SIM card after inconsistence occurs in any comparison. Meanwhile, the invention further discloses a mobile terminal; due to the adoption of the scheme disclosed by the invention, the flexible locking of the network of the mobile terminal can be realized; furthermore, on the conditions that the customized information is operator information or a combination of the operator information and counterpart information in any network, being capable of providing service, of the same operator or the combination of the same operator and the counterpart, the mobile terminal can be operated normally only by the inserting of the SIM card customized by the operator, so that the problem that the inter-modulations of the mobile terminals across the internal networks of the operator must be returned to the manufacturer to lock network again is solved.

The invention discloses a labyrinth sealing element. The labyrinth sealing element comprises a shell (1), a rotating shaft (2), a first type ring (31) and a second type ring (41). The first type ring (31) is fixedly arranged on the shell (1), the first type ring (31) comprises first V-shaped rings (32), and the first V-shaped rings (32) are arranged on the shell (1) in pairs. The second type ring (41) comprises second V-shaped rings (42). The first V-shaped rings (32) are arranged on the shell (1), the second V-shaped rings (42) are arranged on the rotating shaft, and the first V-shaped rings (32) and the second V-shaped rings (42) are arranged in a mutual engaged manner. The labyrinth sealing ring is extremely simple in structure, and the sealing effect is good.

The invention discloses a liquid labyrinth sealing part shaped like the Chinese character "fei". The liquid labyrinth sealing part comprises a shell (1), a rotary shaft (2), a first form ring (31), a second form ring (41), an outer sealing assembly and an inner sealing assembly. The inner sealing assembly and the outer sealing assembly are arranged in the shell (1) from inside to outside. A liquid labyrinth zone is formed among the shell (1), the rotary shaft (2), the outer sealing assembly and the inner sealing assembly and filled with a liquid sealant, so that each first sealing ring (32) and a second sealing ring (42) adjacent to the first sealing ring are in glue sealing. The liquid labyrinth sealing part is simple in structure and good in sealing effect.

The invention discloses a two-side sealing part which comprises a first form ring (31) and a second form ring (41). The first form ring (31) comprises first H-shaped rings (32) which are arranged on a shell (1) in pairs. The second form ring (41) comprises second H-shaped rings (42). The first H-shaped rings (32) are installed on the shell (1). The second H-shaped rings (42) are installed on a rotating shaft. The first H-shaped rings (32) and the second H-shaped rings (42) are alternately arranged in the axial direction of the rotating shaft. The two-side sealing part is simple in structure and good in sealing effect.

The invention provides a device, method and system for shielding communication between a terminal and a base station, relating to a mobile communication technology and aiming at solving the problem of large transmitting power of a radio signal shielding device in the prior art. The method for shielding communication between the terminal and the base station comprises the steps that: a shielding device acquires identification of at least one network cell to be shielded; the shielding device acquires the configuration information of a physical random access channel (PRACH) of the network cell according to the identification of the network cell; and the shielding device sends a random access preamble on each PRACH of the network cell according to the configuration information of the PRACH so as to block the PRACH. The invention has the advantages of lowering power consumption and meeting the environment protection requirement.

The invention relates to a dry screw compressor host machine rotor shaft sealing structure. The invention is characterized in that an air sealing position is divided into two sealing units by two groups of washers; each sealing unit is provided with two stainless steel sealing rings; a stainless steel wave-shaped spring is arranged between two sealing rings; by virtue of the force of the wave-shaped spring, the end surface of the stainless steel sealing ring can be tightly attached to the washer or shell; meanwhile, when the rotor is rotated, the stainless steel sealing ring is floated on the rotor shaft and an oil retaining ring is sleeved on the rotor shaft. The invention has the advantages of stable sealing performance of the floating ring, reliable operation, long service life, simple manufacture, convenient installation, and low production cost; the floating ring has automatic centering function and the sealing ring is basically not abraded; the invention can effectively block intercommunication of oil and gas, reliably ensures the oil to enter the compression chamber and ensures no oil in the provided pressure gas; the non-contact sealing is adopted, and the sealing can be achieved by the pressure reduction produced in sealed fluid.

The invention discloses an F type fluid labyrinth sealing part. The F type fluid labyrinth sealing part comprises a housing (1), a rotating shaft (2), an F-shaped ring (31), and a ring (4) which is in a shape of a Chinese character 'Gan (dry)', an outer sealing assembly and an inner sealing assembly, wherein the inner sealing assembly and the outer sealing assembly are arranged in the housing (1) from inside to outside; a fluid labyrinth area is formed among the housing (1), the rotating shaft (2), the outer sealing assembly and the inner sealing assembly; the fluid labyrinth area is filled with fluid sealing glue through which a first sealing ring (32) and a second sealing ring (42) which are adjacently arranged can be subjected to glue sealing. The F type fluid labyrinth sealing part is simple in structure, and good in sealing effect.

The invention discloses a T-shaped liquid labyrinth sealing element. The sealing element comprises a casing (1), a rotating shaft (2), a first T-shaped ring (31), a second T-shaped ring (41), an outer sealing component and an inner sealing component, wherein the inner sealing component and the outer sealing component are arranged in the casing (1) from inside to outside; a liquid labyrinth region is formed among the casing (1), the rotating shaft (2), the outer sealing component and the inner sealing component and is filled with a liquid sealant, so that sealant seals are formed by first sealing rings (32) and second sealing rings (42) which are adjacent. The T-shaped liquid labyrinth seal is simple in structure and good in sealing effect.