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84results about How to "Small storage space" patented technology

Water tank type weight test block for bridge type crane static test

The invention relates to the field of test and detection of bridge type cranes and in particular relates to a water tank type weight test block for a bridge type crane static test. A water inlet (1a) is formed in the top or the upper end part of the side wall of a tank body of each water tank (1); a water discharging port (1b) is formed in the lower end part of the bottom wall or the side wall of each tank body; a plurality of water tanks used for the static test can be collected and stored in a stacking manner; an assembling type support frame (2) is in a detachable structure; an inner cavity used for placing the water tanks is arranged in the assembling type support frame; an upper cavity opening from which the water tank can be hung in is formed in the inner cavity; water used as a load in the static test is arranged in the water tank; each side edge of the assembling type support frame is provided with a reinforced plate (6); and the inner side wall surface of each reinforced plate is provided with a rib plate (7) which can be used for preventing the side wall of each water tank from deforming after the water is filled. The material consumption and the test cost can be reduced; the weight of the empty water tank after water is discharged is light; and as the assembling type support frame is in the detachable structure, the weight of members required to be stored after the test is light, and the members can be transported and stored conveniently.
Owner:长沙东屋机电有限责任公司

Inner core acceleration type cyclone separator

The invention discloses an inner core accelerated cyclone separating device used for a vacuum cleaner. The inner core accelerated cyclone separating device comprises an external cyclone chamber used for separating dust from air with dust, a first dust collection chamber which is encircled by the external cyclone chamber, a central cone-shaped accelerator having the same axis with the external cyclone chamber, a second collection chamber collected with the output of the central cone-shaped accelerator, a water droplet-shaped deflector in the cyclone separating device used for enhancing the efficiencies of the pumping and dust collection, a dust ring and a reflective screen. The air flow with dust entering the cyclone separating device is rotated only once, and the thick ash is separated by the external cyclone chamber into the first dust collection chamber, the core of the cyclone region has air flow with small dust particles; after being further accelerated by the droplet-shaped deflector and the central cone-shaped accelerator, the thin dust is separated and is stored into the second collection chamber, therefore, compared with a twin dust collector, the inner core accelerated cyclone separating device reduces the energy loss of air flow with dust, achieves greater air volume and obtains better pumping and dust collection efficiencies.
Owner:徐凯

Lightweight identity authentication key negotiation method for resource-constrained terminal

The invention discloses a lightweight identity authentication key agreement protocol for a resource-constrained terminal. According to the method, a set of identity authentication and session key agreement service is provided between a resource-constrained terminal and a server. The method can ensure that the identities of the resource-limited terminal and the server are real and effective, and malicious attacks are avoided. The scheme comprises four stages: a registration stage, a login and authentication stage, a password modification stage and an intelligent card revocation stage. According to the method, an elliptic curve algorithm is introduced to encrypt key data in a login authentication process. A one-way Hash algorithm is introduced in the protocol design process, the risk of data plaintext transmission leakage is avoided on the basis that the intelligent card and password double factors serve as important links of identity authentication, and security vulnerabilities such as intelligent card loss attacks and offline dictionary attacks are resisted. Compared with other key negotiation protocols, the protocol is small in key size, system parameters and storage space, high in operation speed and suitable for terminal equipment with limited computing resources and storage resources.
Owner:GUILIN UNIV OF ELECTRONIC TECH +1

Portable switch cabinet handcart rail

The invention discloses a portable switch cabinet handcart rail. The portable switch cabinet handcart rail comprises longitudinal rails, wherein the longitudinal rails are arranged in parallel in a left-right way and are fixedly connected by a width adjustment device, clamping arms are fixedly arranged at a front end of the width adjustment device and extend towards a switch cabinet, clamping claws are fixedly arranged at the bottoms of the clamping arms and are matched with clamping groove hooks at the bottom of the switch cabinet, limiting plates are arranged at two sides of at least one longitudinal rail and upwards extend, two guide plates are fixedly arranged at the upper end of the limiting plate and extend opposite to each other, a gap is formed between the two guide plates and is matched with switch cabinet handcart wheels, and an inlet end of each gap is arranged to be a bell mouth with a wide external end and a narrow internal end. The portable switch cabinet handcart rail has the advantages that the portable switch cabinet handcart rail is reliably connected with a switch cabinet and is not liable to swing, a handcar can be rapidly and accurately aligned to an entrance of the switch cabinet, the alignment ratio is improved, the handcar is prevented from being pulled and pushed repeatedly, different switch cabinet widths can be adapted by adjusting the width of the handcart rail, the handcar can be successfully pushed to the switch cabinet in one time, switching operation can be completed by a person, and the operation efficiency can be greatly improved; and moreover, the portable switch cabinet handcart rail is small in size, is convenient to carry and occupies small space for placing.
Owner:STATE GRID SHANDONG ELECTRIC POWER COMPANY WEIFANG POWER SUPPLY +1

Contact sliding telescopic fan blade

The invention provides a contact sliding telescopic fan blade. The contact sliding telescopic fan blade comprises a plurality of contact sliding blocks and at least two stages of limiting clamping hasps. The contact sliding telescopic fan blade is characterized in that the contact sliding blocks are arranged on the surface of the telescopic fan blade and a sliding way to make contact with the fanblade, wherein the limiting clamping hasps are connected to the inner side of one end of the sliding way of each section of telescopic fan blade and the outer side of the other end of the sliding way,and at least two limiting clamping hasps are arranged in a linear array mode, so that at least one stage of buckle and two stages of disengagement prevention are formed; the cross section of one endof a sleeve fan blade is sealed and plugged, so that the fan blade is prevented from deforming and disengaging; the fan blade is provided with piers or pit grooves or T-shaped ribs, so that friction is reduced, and bending resistance is enhanced; the plastic, rubber or graphite contact sliding blocks and the fan blade are attached with a lubricating agent or graphite powder to make contact with the fan blade in a sliding mode, so that friction is reduced; and the strip-shaped contact sliding blocks protrude outwards or protrude inwards to make contact with the fan blade in a sliding mode, andthe fan blade is cleaned. According to the contact sliding telescopic fan blade, the fan blade is connected with an anti-disengagement safety part, multi-stage buckles are used for disengagement prevention, a safety rope is used for disengagement prevention, a power source is automatically turned off when disengagement is carried out, the telescopic range of the fan blade is enlarged, the diameterof a lamp does not need to be increased, and the lamp can be flexibly matched.
Owner:毛永波
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