63results about How to "Stable structure" patented technology

The invention discloses a focal length adjusting apparatus for a VR device. The apparatus comprises a rotating wheel, a left cross-arm wheel, a right cross-arm wheel, a left folding-arm wheel, a right folding-arm wheel, a left vertical wheel arm and a right vertical wheel arm, wherein a wheel disc rotates the rotating wheel, the wheel disc drives the left cross-arm wheel and the right cross-arm wheel to rotate, the left cross-arm wheel and the right cross-arm wheel drive the left folding-arm wheel and the right folding-arm wheel to rotate, and the left folding-arm wheel and the right folding-arm wheel then respectively drive the left vertical wheel arm and the right vertical wheel arm to rotate in a vertical direction. Besides, the invention further provides a VR device. Back-and-forth adjustment of a front cover is realized through the focal length adjusting apparatus for the VR device. Compared to the prior art, the VR device provided by the invention is firm in structure, improves the internal structure of virtual reality goggles, saves space, reduces the volume, at the same time, also reduces the weight, and enables a user wearing the goggles to have better experience.

The invention discloses an alarming type pipe flame arrester. The flame arrester comprises a main flame arresting pipe; one end of the main flame arresting pipe is fixedly connected with one end of a transition pipe section through a variable-diameter connecting pipe; a first flame arresting core and a second flame arresting core are arranged inside the main flame arresting pipe; the outer side of the first flame arresting core and the outer side of the second flame arresting core are fixedly connected with explosion-proof rings; a flame detector penetrates through the middle of the second flame arresting core; an alarm is arranged at the top end of the main flame arresting pipe; a control mainboard is arranged inside the top end of the flame detector; and a metal connecting pipe is arranged in the middle of the flame detector. According to the flame arrester, the multi-section type pipe flame arresting structure replaces the traditional equal-diameter structure, the flame arresting effect is effectively improved through multiple diameter changes, the structures of the flame arresting cores are stabilized through design of the explosion-proof rings, pipe damage caused by thermal deformation of the flame arresting cores is prevented, the early warning and alarming functions are realized through flame detection, the safety of the flame arresting process is guaranteed, damage to the pipe infrastructure is reduced, and the flame arrester is efficient and safe.

The invention discloses an anti-hardened biological fermentation reaction kettle with temperature adjustable. The reaction kettle comprises a rotating shaft, a tank body, an air intake circular pipe and a filter plate, wherein the top of the tank body is connected with a tank cover through a flange plate sealing part, the inner wall of the lower portion of the tank body is fixedly connected with an internal thread fixing ring, the internal thread fixing ring is in threaded connection with an external thread filter frame, the middle of the external thread filter frame is provided with the filter plate, the filter plate divides the inner portion of the tank body into a fermentation chamber and a liquid collection chamber, the inner portion of the fermentation chamber is provided with a spiral heating pipe, the outer portion of the tank body is provided with a cooling clamp cover, and an air inlet circular pipe is arranged in the fermentation chamber; hoisting assembly is convenient, thesealing effect is good, the heating and cooling operation of the fermentation chamber in the tank body can be conveniently adjusted through the cooling clamp cover and the spiral heating pipe; a gas distribution vertical pipe, a gas distribution transverse pipe and a gas distribution circular pipe are pre-buried in raw materials of the fermentation chamber, input gas is fully in contact with fungus in the raw materials conveniently; the effect that the hardening of the raw materials influences fermentation is prevented; a filter board filters out the fermented liquid to perform biomedical engineering conveniently.

The invention discloses a logistics cargo box which comprises a frame. The frame is internally provided with two goods shelf cavities up and down. A control cavity is formed between the goods shelf cavities. Partition plates are arranged between the control cavity and the goods shelf cavities. The left side sections of the partition plates are provided with hollow grooves. The goods shelf cavities are internally provided with goods shelves. The left side faces of the goods shelves are provided with marking plates used for marking the goods shelves to enable goods put in all the goods shelves to be distinguished. An upper threaded column and a lower threaded column are arranged on the left side section inside the control cavity and each connected with a traction block in a threaded fit mode. The traction blocks penetrate through the hollow cavities to be fixedly connected with the goods shelves in the goods shelf cavities. By adoption of the logistics cargo box, the goods shelves are automatically controlled to be moved out and in, workers can store the goods conveniently, and the logistics cargo box is stable in structure.

The invention relates to the field of mass damper devices, in particular to a single mass damper device for hull overall vibration control. The single mass damper device for hull overall vibration control comprises a single TMD device for controlling horizontal overall vibration of a hull and a single TMD device for controlling vertical overall vibration of the hull. During working, a first TMD mass block in the TMD device for controlling the horizontal overall vibration of the hull is pulled by a first spring to move to and fro between two baffles on a guide rail; a second TMD mass block in the TMD device for controlling the vertical overall vibration of the hull is pulled by a second spring to vertically move on an upright; and therefore, shock is absorbed by using inertia force resistance and antiresonance provided by assistant mass. The single mass damper device for hull overall vibration control is suitable for horizontal and vertical low frequency overall vibration control designof a large-sized surface ship, and has an obvious vibration control effect on the horizontal and vertical bending vibrations of the hull; and the overall response generated by the ship under the action of external load can be reduced, and the overall resistance of the ship to the horizontal and vertical bending vibrations is enhanced.