7results about How to "Ensure support stability" patented technology

The utility model discloses a municipal administration pipeline trench support structure, including the organism, the inside wall on one side of organism is equipped with power mechanism, be equipped with four positive and negative tooth screw rods on power mechanism, and the middle part of four positive and negative tooth screw rods is commonly provided with telescopic mechanism. The utility model can make the support device have the function of automatically adjusting the support width, can adjust the spacing of two support plates according to the trench of different width, make two support plates more stably support in the trench, effectively improved the practicality of support device, guaranteed the stability of support device.

Relates to the technical field of hydraulic support stability regulation and control, in particular to a top coal caving hydraulic support supporting stability rapid judgment and regulation and control method which comprises the following steps that S1, pose parameters of all parts of a hydraulic support are collected; s2, judging whether the hydraulic support is in a forward tilting instability state or a backward tilting instability state or not; s3, calculating the load distribution condition of the top beam; s4, solving an equivalent concentrated load borne by the top beam and a load acting position of the equivalent concentrated load; s5, calculating an instability threshold value of the equivalent concentrated load of each point of the top beam; s6, establishing a top beam unbalance loading instability partition judgment model, and determining corresponding instability types when the equivalent concentrated loads are distributed in different partitions and are greater than an instability threshold value; and S7, establishing regulation and control methods correspondingly adopted in different instability states and instability types, and integrating a regulation and control method library. According to the comprehensive evaluation method, the support pose characteristics and the support bearing characteristics are mutually fused, the supporting stability of the top coal caving hydraulic support is guaranteed, and therefore the production safety of a fully mechanized caving face is guaranteed.

The utility model discloses an angle-adjustable flexible oil cylinder support which comprises a base, two ends of the upper portion of the base are fixedly connected with fixed frames, the interiors of the fixed frames are movably connected with movable frames, the inner ends of the movable frames are fixedly connected with fixed blocks, the upper end of the fixed block on the left side is fixedly connected with a motor, and the upper end of the fixed block on the right side is fixedly connected with an oil cylinder. By arranging the motor, the first bevel gear, the second bevel gear and the rotating shaft, angle rotation adjustment of the whole support can be achieved, meanwhile, three sets of screws in the fixing ring are matched with arc-shaped clamping plates, and a cylinder can be positioned and clamped; the supporting stability and adjustability of the whole support are ensured, and the whole support is flexible to use and can be used under different working conditions.

The utility model provides a kind of mobile phone shell with stand, belong to mobile phone accessory technical field.A kind of mobile phone shell with stand includes mobile phone shell and stand;The utility model will the upper end of the stand of length and width size and the size of mobile phone shell consistent be hinged in the upper end of mobile phone shell, so that when mobile phone is placed vertically, can overturn and unfold stand, so that the support point of stand to mobile phone shell is located above the center of gravity of mobile phone, prevent the toppling of mobile phone, guarantee the stable support when mobile phone is placed vertically, in addition, folding structure is provided on the side of stand, when folding structure deformation can reduce the width of stand, ensure that the horizontally placed mobile phone can be supported by the stand, ensure that the stand can meet the support demand under the two conditions of mobile phone horizontal placement and vertical placement, and can maintain the stable state under support, prevent the toppling problem of mobile phone.

The present invention discloses a stabilizing device for the internal air duct of an integrated stove, comprising a stabilizing end frame and a stabilizing support plate, wherein the stabilizing end frame is adjustably connected to the stabilizing support plate, the stabilizing end frame comprises a main support rod, an adjusting plate and a side support plate, a limiting rod is arranged on the main support rod, the adjusting plate is adjustably fixed on the top surface of the main support rod, the side support plate is movably sleeved on the limiting rod, and the side support plate is connected to the adjusting plate through a connecting rod, and a top pressure assembly is arranged between the two side support plates. The installation method of the present invention comprises the following steps: 1) assembling the stabilizing end frame; 2) installing the stabilizing end frame and the stabilizing support plate; 3) installing the air duct and the stabilizing device; 4) installing the air duct and the integrated stove. The present invention supports and stabilizes the two ends of the air duct through the stabilizing end frame, compresses and limits the tops of the two ends of the air duct through the top pressure assembly, and then auxiliary supports the middle part of the air duct through the stabilizing support plate, thereby effectively ensuring the structural stability of the air duct and making the smoke in the air duct discharge smoother.

The utility model is suitable for the technical field of geological survey, and provides an anti-collapse protection device for geological survey, which comprises a support rod, the supporting top plate is fixed at the top of the supporting rod and is used for supporting a pit hole; the fixing frame is mounted in the supporting top plate; the supporting cylinder is fixed on the fixing frame, and an extension rod is slidably mounted in the supporting cylinder; the extension plate is mounted at the top of the extension rod and is used for assisting in supporting a pit hole; and the support cylinder and the extension rod are matched with the extension plate and are used for expanding the supporting height. According to the anti-sloughing protection device for geological exploration, the supporting requirements of pits with different depths can be met through the height-adjustable supporting structure, and universality and practicability are enhanced.

A fiber grating sensor for real-time monitoring of concrete rust cracking strain field and rust cracking prediction in situ includes a support system, a fiber fixing system, a radial strain measurement sensor, a circumferential strain measurement sensor, a signal demodulation system and a data acquisition system. The fiber fixing system is arranged on the support system, the radial strain measurement sensor and the circumferential strain measurement sensor are inserted into the fiber fixing system, the radial strain measurement sensor and the circumferential strain measurement sensor are respectively connected to the signal demodulation system, and the signal demodulation system is connected to the data acquisition system. The present invention provides a fiber grating sensor with simple operation, short test cycle, low cost, and capable of real-time monitoring of radial and circumferential rust cracking strain field changes of concrete around steel bars in situ, improving the accuracy and authenticity of the results, which is of vital importance for in-depth research on the problem of reduced concrete durability caused by steel bar corrosion, and provides a basic guarantee for future concrete structure durability design.