13results about How to "High security risk" patented technology

The utility model discloses a sewing machine which comprises a base, a machine head and a protective cover. A needle plate and a thread hooking mechanism (not shown) are arranged on the base. The machine head is connected to the base, a machine needle mechanism and a presser foot mechanism are arranged on the machine head, and the machine needle mechanism is provided with a machine needle rod and a machine needle located at the end of the machine needle rod. And the protective cover is movably arranged on the machine head, is positioned on the peripheral side of the machine needle rod, and has an extending state of extending towards the base and shielding the machine needle and a retracting state of retracting towards the inner side of the machine head and being far away from the machine needle. When the sewing machine is in the stretching-out state, the protection cover can stretch out in the direction of the base to shield the machine needle, fingers of a child can be effectively prevented from making contact with the machine needle, and the safety risk in the using process is reduced. When needle replacement or threading operation needs to be carried out, the protective cover can retract towards the inner side of the machine head, enough space is reserved for needle replacement or threading operation, operation is easy, tedious operation and safety risks in the dismounting process are avoided, and the use safety of the sewing machine is greatly improved.

This invention relates to the field of hydraulic support installation technology, and more particularly to an installation device and method for installing the side guard plate of the top beam of a hydraulic support. The invention includes a horizontally arranged placement platform and a telescopic frame. The telescopic frame includes multiple sets of telescopic components, which are arranged parallel to each other and spaced apart along the length of the placement platform. Each set of telescopic components includes a fixed cylinder, a push-pull rod, a first hydraulic cylinder, and two vertically arranged clamping columns, all arranged along the width of the placement platform. The fixed cylinder is fixedly installed on the bottom wall of the placement platform. The push-pull rod is inserted into the fixed cylinder, and the opposite ends of the push-pull rod and the fixed cylinder are respectively fixedly connected to the two clamping columns. The first hydraulic cylinder is fixedly installed inside the fixed cylinder. By setting multiple sets of telescopic components, multiple first hydraulic cylinders can drive multiple clamping columns to move synchronously inward, thereby applying a stable and uniform compressive force to the side guard plate and overcoming the elastic force of the compression spring on the guide rod of the side guard plate.

The present application belongs to the field of environmental protection engineering construction technology, especially a hydrogen fluoride washing device, aiming at the operation of hydrogen fluoride washing tower, because the waste gas is not fully contacted with lye, and hard crystals are easily formed during the reaction, attached to the filler and tower wall, resulting in the blockage of the filler, the increase of system pressure drop, the increase of fan energy consumption, and the need for manual cleaning, which exists safety risk and affects the washing efficiency, the following scheme is proposed, including a washing tower body, an air inlet is formed on the outside of the washing tower body, and an air inlet pipe is fixedly connected inside the air inlet, an air outlet is formed on the top of the washing tower body. The hydrogen fluoride washing device disclosed by the present application has the beneficial effects of automatically removing the crystals in the tower by rotating spraying and brushing and scraping components, and periodically extruding the filler by using a pressure plate, which can shake off the crystals, enhance the turbulence to improve the purification efficiency, and realize automatic continuous operation, avoiding the high-risk manual cleaning.

This invention discloses a device and method for repairing damaged underwater fixed structures. The device includes a hemispherical or multi-hemispherical shell with the same shape and material as the underwater fixed structure to be repaired. Two flexible ropes connected to a ship's winch are fixed to the top of the shell for pulling the shell to adjust the horizontality of the shell's bottom surface in the Y direction. Two first electromagnetic reversing valves are symmetrically arranged on the bottom of the outer wall of the shell for spraying water downwards to adjust the horizontality of the shell's bottom surface in the X direction; these two first electromagnetic reversing valves also serve as water inlet valves. The device also includes a second electromagnetic reversing valve for adjusting forward or backward movement in the X direction, a third electromagnetic reversing valve for adjusting forward or backward movement in the Y direction, multiple horizontality sensors, an air pump, and a flexible air pipe for inflating the shell. This invention is highly practical, easy to operate, simple to construct, safe to construct, and can completely prevent the damage from spreading while ensuring the long-term normal use of the underwater structure to be repaired.

The invention belongs to the technical field of high-performance special materials, and discloses a one-step method for preparing silicon alkyne resin MDPES. The method comprises the following steps: mixing 2-halophenylacetylene, dichlorosilane and a solvent, adding magnesium, and heating for reaction; after the reaction is finished, adding acid liquor for neutralization, and then extracting and layering to obtain an organic layer; then concentrating the organic layer to obtain a concentrated solution, and finally carrying out molecular distillation on the concentrated solution to prepare the silicon alkyne resin MDPES. Wherein the 2-halogen phenylacetylene comprises one of 2-iodine phenylacetylene, 2-bromophenylacetylene and 2-chlorophenylacetylene; and the molecular formula of the dichlorosilane is R1R2SiCl2. According to the method provided by the invention, the 2-halophenylacetylene and the dichlorosilane are subjected to one-step reaction in the anhydrous solvent to prepare the product with high purity and high yield. The method uses few raw materials, the preparation steps are simple, and the production efficiency is high; and the prepared product has the advantages of high yield, high purity, safety, environmental protection and easiness in industrialization.

The utility model provides a kind of two-piece type multi-station seamless wear-resistant regulating gate valve, belong to valve technical field, including regulating control device, the regulating control device includes valve body, the circumferential surface of the valve body is fixedly connected with valve seat, the sealing device includes rectangular plate, the bottom end fixedly connected with warped plate of the rectangular plate.When valve plate promotes rectangular plate to displace downward, so that rectangular plate bottom end fixedly connected warped plate immediately occurs lever movement with its inside hinged support as fulcrum, further make warped plate far from the end of rectangular plate and lift upward, further make protective cover provide protection for air bag, so as to solve the problem that gate valve is usually relied on metal sealing between valve plate and valve body, there is also a little leakage, so as to cause the precision fit of sealing surface to be damaged rapidly, finally lead to the failure of valve regulating function, wear-resistant characteristic loss, seriously affect the continuous and stable operation of system.

This utility model relates to the field of tunnel construction technology, specifically to a mechanized installation device for corrugated steel plates. It is fixedly installed at the end of the boom of a mobile lifting device and includes a fixed base, a rotating base, and a movable base. The fixed base is fixedly connected to the end of the boom, and the rotating base is rotatably mounted on the fixed base. The fixed base is equipped with a rotation drive device for driving the rotating base to rotate. The movable base is connected to the rotating base via a detachable insertion mechanism. An electromagnet for picking up corrugated steel plates is installed at the end of the movable base away from the rotating base, and the end of the movable base near the rotating base is fixedly connected to the lifting rope of the mobile lifting device. This mechanized installation device for corrugated steel plates effectively solves the drawbacks of traditional corrugated steel plate installation methods, such as low construction efficiency, significant safety hazards, and difficulty in guaranteeing installation accuracy.

This invention relates to a low-temperature difference indirect temperature control multifunctional bathing aid device, comprising a bathtub and a bathing chair. On one hand, this invention indirectly adjusts the temperature of the bath liquid in the bathtub based on the temperature control of the water tank, and ensures that the water discharged from the bathtub can circulate and return while maintaining equal supply and return volumes. This not only eliminates safety risks caused by temperature differences in the bath liquid, but also avoids direct temperature control. Constant temperature control is achieved while the bath liquid is flowing, preventing direct waste discharge. Furthermore, based on the massage or acupoint stimulation function created by the water jets, and the equal supply and discharge of water in the water replenishment chamber, interference between inflow and outflow is avoided. The water replenishment chamber serves as the optimal water temperature monitoring area for more accurate temperature control. On the other hand, the built-in locking mechanism eliminates interference or obstacles caused by external components, preserving the overall aesthetic appearance of the bathtub. The locking force, generated by the internal squeezing force from multiple points on the lock head, not only allows for adjustment but also reduces safety risks associated with bathing.

The present application provides an intermediate compound and a preparation method therefor and an application thereof. The intermediate compound has the following structural formula (I). By using the intermediate compound of the present application, dedrogesterone can be conveniently synthesized only by performing AB ring double bond construction and side chain modification, the total yield is high, and the route is short.

The application discloses a disc circle lifting and rotating discharging device, and particularly relates to the field of disc circle discharging, which comprises a workshop, a feeding frame, disc circle materials, a slide rail is arranged in the workshop, the feeding frame is slidably arranged in the slide rail, the disc circle materials are arranged on the feeding frame, a rotating discharging device is arranged in the workshop, the rotating discharging device is composed of a rotating assembly and a lifting assembly, the rotating assembly comprises a rotating base fixedly arranged in the workshop, a device base is rotatably connected to the top of the rotating base, a transmission gear ring is arranged at the bottom of the device base, a driving motor is arranged on one side of the rotating base, a transmission gear is fixedly connected to the output end of the driving motor, and the transmission gear and the transmission gear ring are arranged in meshing mode. The rotating discharging device can bear and rotate the disc circle, replaces the forklift transportation, avoids manual intervention, and meets the requirements of safe transportation, high efficiency, low cost and the like.

The utility model discloses a building decoration engineering is with board polishing device, including fixed frame, sliding slot, sliding block, driving motor and polishing disc, the sliding slot is set up at the top of fixed frame, the sliding block swing joint is in the inner wall of sliding slot, driving motor fixed mounting is at the bottom of sliding block, the polishing disc fixed mounting is at the output of driving motor, the surface fixed connection of driving motor has fixed ring. The utility model discloses a fixed ring, L board, baffle and press down subassembly are set up, can effectively make fixed ring to L board fixed, then through press down subassembly and promote baffle and move down, make baffle and the top of board fit, solved the current board polishing and do not have the function of preventing the waste chip splashing, resulting in the waste chip of polishing process will fly everywhere, thereby to the body of operator cause harm, not only increased the safety risk of workplace, also reduced the polishing efficiency of board problem.

This invention relates to the field of electrical equipment technology and provides a circuit breaker with fire extinguishing function. The circuit breaker includes a circuit breaker body with a handle. A connecting block is fixedly installed on one side of the circuit breaker body. A mounting sleeve is fixedly installed on the connecting block by a first bolt. A box for storing dry powder is fixedly installed on one side of the mounting sleeve, and a mounting shell is fixedly installed on the outer wall of the box. A fire extinguishing mechanism for extinguishing fires in electrical equipment is installed on the box and the mounting shell. The circuit breaker with fire extinguishing function provided by this solution solves the problems of existing circuit breakers, which not only fail to extinguish fires in a timely manner but may also fail to trip automatically when a fire occurs.

The application belongs to the technical field of digital asset construction, and more particularly to a data asset and data blood relationship unified construction method and system, which extracts key asset objects and defines full-dimension attributes through double-dimension division of a digital transformation project full life cycle and multi-source heterogeneous data types, constructs an integrated core meta-model covering assets, blood relationship and data fusion, relies on a data platform to analyze, manage and fuse multi-source data, synchronously completes asset instance filling and full-link three-dimensional blood relationship graph construction, generates an integrated model, constructs a hierarchical directory through distributed storage and metadata index, constructs a value evaluation system based on the analytic hierarchy process to complete prediction optimization, and finally realizes multi-dimension visual display and full-link security audit.