33results about How to "Avoid the possibility of leakage" patented technology

The present invention discloses a verification method to on-line game client side and server cluster and comprises the following steps: verifying ID to authentication server with username and password by client; assigning a random number and a symmetric encryption key to client; encrypting the random number with the symmetric encryption key by client and taking the encrypted random number as verification evidence for ID verification with other server in server cluster. The random number and symmetric encryption key assigned by authentication server are taken as the basis of ID verification and authentication between client and on-line game server in server cluster through the invention; hence, there is no need to save username and password for long time in client side and possibility of leaking username and password is prevented, verification process of server cluster is simplified, efficiency of on-line game server is improved.

One or more embodiments of the specification provide a block chain-based logistics distribution method, system and device. The block chain includes a plurality of node devices corresponding to a logistics delivery sites and logistics distribution sites, the method includes the following steps: a logistics delivery site receives logistics information which includes user receiving address information, a secret key related with a public key of a distribution site is utilized to encrypt the logistics information to obtain encrypted logistics information, wherein the distribution site is one determined according to the user receiving address information, and the encrypted logistics information is sent to a distributed account book of the block chain; and the logistics distribution site obtainsthe encrypted logistics information from the distributed account book of the block chain, uses a secret key related with a private key of the distribution site to decrypt the encrypted logistics information to obtain the logistics information, and distribution is performed based on the logistics information.

The present invention provides a dye penetration welding line leakage test process for an aluminium alloy car body, comprising the steps of eliminating all of the oxide scale, pocking and dust on the welding line to be tested; washing the oil contamination off the welding line to be tested and cleaning the welding line by a piece of clean cloth or cotton yarn; spraying and coating osmotic agent evenly on the outside of the welding line to be tested every 2 to 3 minutes, making sure that the welding line is wet within 10 to 15 minutes; observing whether leakage exists on the other side of the welding line or not and mending the welding line if leakage exists. Therefore, the probability that the welding line on the car top leaks can be avoided by using the process with high technique sensitivity and reliability surpassing the rain test in the present invention, and the probability of accumulated water pollution caused by the rain test in workshop can also avoided. Furthermore, the quality of the welding line surface on the car top can be ensured through fault detection because the process can be performed easily without any other devices and the result is easy to observe. General process workers can perform the dye penetration welding line leakage test process after a simple training, thus, professional fault detection workers are not necessary.

The embodiment of the invention provides a digital asset data access method and device, and a digital asset transaction system, and the method comprises the steps: transmitting the routing informationof a digital asset data access interface of a seller blockchain node to a buyer blockchain node after the transaction between the seller blockchain node and the buyer blockchain node is completed; and enabling the buyer blockchain node to access the digital asset data of the seller blockchain node according to the routing information.

The invention provides an ice cream machine. The ice cream machine comprises a refrigerating cylinder body. The ice cream machine is characterized in that a wide-runner refrigerant flowing channel is arranged on the outer wall of the refrigerating cylinder body, is a channel that the width of a cross section of the refrigerant flowing channel is larger than the height and comprises a channel shell; and the channel shell is buckled to the outer wall of the refrigerating cylinder body to form the single-channel wide-runner refrigerant flowing channel. The ice cream machine is high in refrigerating efficiency and can be used for rapidly producing ice cream.

The invention discloses a low-pressure air-tight sealing spherical valve clack lifting check valve with a ball holding device. The lifting check valve comprises a valve body, a valve deck, a gasket, a fastener, a spring and a spherical valve clack, wherein the sealing face of the valve body is an inclined face, a guide seat, the ball holding device and the spherical valve clack are arranged in an upper end opening of the valve body, a convex face positioning spigot is arranged on the lower end face of the guide seat, the convex face positioning spigot is in matched contact with a groove positioning rabbet formed in the upper end face of the ball holding device, a spherical face consistent with the spherical valve clack in diameter is arranged inside the ball holding device, an inner groove for containing the spherical valve clack is formed in the lower end face of the guide seat, and evenly-distributed drainage holes are formed in the side face of the guide seat. The low-pressure air-tight sealing spherical valve clack lifting check valve has the beneficial effect that the possibility of valve leakage caused by machining errors of two structures of plane sealing and conical surface sealing is avoided.

The invention belongs to the technical field of microneedles, and particularly discloses a microneedle female die, a female die, a preparation process of the female die, a microneedle patch and a preparation process of the microneedle patch. The microneedle female die comprises a PDMS forming groove and a defoaming film, and a plurality of microneedle protrusions are arranged in the PDMS forming groove in an array mode. And the defoaming film is attached to the upper part of the PDMS forming groove. When the female die is prepared from the female die, interference PDMS mixed liquid is added into the PDMS forming groove, the bubble removing film is attached to the upper portion of the PDMS forming groove to seal the PDMS mixed liquid in the PDMS forming groove, and bubble-free planar shaping treatment is conducted on the female die. The female die obtained by recarving the female die is good in integrity, and the polymer microneedle in any form can be prepared; the microneedle produced through the female die has the advantages of being accurate in drug delivery, controllable, stable, easy to produce, capable of saving materials and capable of being flexibly transformed, the yield and the preparation efficiency can be effectively improved, and the cost is reduced.

The invention discloses an oil-tight vibration exciter and a vibrating screen.The vibration exciter comprises a bearing assembly, a spindle assembly, wherein the bearing assemblycomprises a bearing member and a bearing seat; the spindle assembly is arranged between the bearing member and the bearing seat in a penetrating mode; the bearing seat is provided with an oil storage groove used for accommodating lubricating oil, and when in use, the height of the liquid level of the lubricating oil in the oil storage groove is lower than that of the joint of the bearing member and the bearing seat; and the vibrating screen comprises the oil-tightvibration exciter. According to the oil-free vibration exciter and the vibrating screen, theoil storage groove is formed in the bearing seat, the lubricating oil is stored in the oil storage groove, the height of the liquid level of the lubricating oil in the oil storage groove is lower than that of the joint of the bearing seat and the bearing member,the possibility of the lubricating oil leaking from the joint of the bearing seat and the bearing member or the joint of the bearing member and the spindle assembly is avoided, thus oil-tight character of the vibration exciter is realized, and the using amount of the lubricating oil is significantly saved

The invention relates to an improved plastic metal loose joint pipe which comprises a metal connecting element and a plastic element containing a metal insert, wherein one end of the plastic element is movably connected with the metal connecting element; the outer edge of a pipe opening of the plastic element is provided with a first flange; one end of the metal connecting element is provided with a second flange which is protruded to an inner hole; and the outer diameter of the first flange is smaller than the inner diameter of the metal connecting element and larger than the inner diameter of the second flange. The metal insert is arranged outside one end of the plastic element which is connected with the metal connecting element; and one end of the metal insert is embedded into a plastic body, and the other end of the metal insert is outwards flared according to the shape of the first flange. The matching of the metal insert and an injection mold can solve the problem of material overflow caused in the time when the plastic element is injected and moulded. After the improved plastic metal loose joint pipe is connected to a pipeline system, the liquid in a pipe can not touch the metal insert, and the seepage from the combined surface of the metal insert and the plastic element and the corrosion of the metal insert are prevented; meanwhile, the metal insert can also reinforce the strength of the plastic element and the connecting strength of the plastic element and the metal connecting element.

The invention belongs to the technical field of wind tunnel experiment equipment. Aiming at the technical problem of high-temperature and high-pressure gas leakage caused by pipeline deformation or flange sealing failure due to bending moment formed on a connecting pipeline by a connecting mode in the prior art, the invention provides a valve connecting device for a wind tunnel experiment. The device is provided with a lifting device, the lifting device comprises a flange clamp, an elastic supporting mechanism and a sliding base, the lower end of the sliding base is fixed to the ground, the upper end of the sliding base is connected with the elastic supporting mechanism, the flange clamp is arranged at the top end of the elastic supporting mechanism, and the flange clamp is arranged on a connecting pipeline of a high-temperature valve in a sleeving mode to lock a high-temperature valve flange. With the device, the bending moment formed on the connecting pipeline due to longitudinal extension of a heat storage heater or the dead weight of a valve body during preheating can be greatly reduced, then the possibility of flange leakage at the hoop is avoided, and the the safety is greatly improved.