13 results about "Step height" patented technology

The invention provides a three-step multi-working-face short-circulation weak-blasting step-pitch-control rapid construction method, which comprises the following steps of: dividing the section of a thin-layer schist tunnel into four parts, namely an upper step, a middle step, a lower step and an inverted arch, and carrying out excavation and support construction on the upper step, the middle step, the lower step and the inverted arch; by means of reducing the height of an upper step, jointly constructing short-step excavation, loose blasting and mechanical excavation, dynamically adjusting the combination of construction working faces and the like, it is guaranteed that thin-layer schist tunnel construction achieves the purposes of rapidly closing and forming a ring, reducing surrounding rock disturbance and improving construction safety and efficiency.

Device for assisting with ascending and descending stairs, comprising: a foot platform with a height that is less than the height of a stair step; at least one flexible traction element that connects the foot platform to the user's upper body, in particular to the hands, shoulders, torso or neck; wherein the at least one flexible pull element enables the user to move the foot platform from one step to another, stepping successively onto a step, then onto the foot platform and subsequently onto another step, thereby raising or lowering the body by a height less than the height of a step; wherein the at least one flexible pull element is designed to ensure secure placement of the foot platform on the steps and to prevent tipping or slipping that could impede the user's movement.

The present invention relates to a precast staircase with low mold opening cost and a manufacturing method thereof, including a precast flight of stairs, a post-cast stair beam, and a connecting platform; the precast flight of stairs includes a number of stair flight units that are sequentially and staggeredly stacked from bottom to top. After the stair flight units are clamped and fixed, the beam steel cage of the post-cast stair beam is placed and connected to the bent part extending from the inclined surface, and then concrete is cast at the beam steel cage to form the post-cast stair beam; the connecting platforms are respectively arranged at the top and bottom of the precast flight of stairs, and the connection between the connecting platform and the post-cast stair beam is realized synchronously by casting concrete at the beam steel cage; a connecting through-hole leading to the inclined surface is provided on the tread surface of the stair flight unit, and a hoisting embedded part extending to the post-cast stair beam is provided in the connecting through-hole. The present invention optimizes the manufacturing method of the precast flight of stairs, adopts stair flight units with a right-angled trapezoidal cross-section, and controls the lengths of the upper bottom surface and the lower bottom surface of the stair flight unit by controlling the slope of the inclined surface in the stair flight unit, so as to achieve the specified step height, and the overall production cost is low.

The invention relates to a high ground stress water-rich tunnel construction method which comprises the following steps: excavating a tunnel by adopting a three-step method, and parallelly and synchronously erecting an upper step and deslagging a lower step; in the construction process, active supporting is conducted through quick excavation, quick supporting and quick closing, and a lower step and an inverted arch are excavated synchronously; in the primary support, profile steel is adopted for installing a steel frame, and a foot-lock anchor pipe is constructed; an inverted arch primary support steel frame and a lower step are constructed in the same cycle, and the distance between a closed ring and a tunnel face is not larger than 20 m; step height and steel frame spacing are adjusted in real time based on monitored and measured data; a three-dimensional drainage network is constructed, and drainage and pressure reduction of a water-rich section are conducted through roundabout parallel guide advanced high-position drainage and pressure reduction. Effective and reliable drainage can be carried out, meanwhile, the collapse risk of the tunnel face is reduced to the minimum, and the safety and stability of the construction process are guaranteed.

The stair climber described here is designed for transporting heavy loads or people with disabilities. Its advantage lies in the step-parallel guidance of the seat, standing, or load platform, eliminating the need for special adjustments to the horizontal plane. The stair climber adapts to different step widths (provided a minimum step width is met), can be operated automatically or manually, and accommodates slightly varying step heights.

The present application relates to a rehabilitation treatment ladder, in particular to an automatically adaptive physical therapy ladder, wherein the ladder comprises a fixed base frame and a plurality of step parts arranged in a ladder shape, the ladder can adjust the step size and step height, and can be transformed into a slope, first, the fixed base frame is used to longitudinally support all the step parts, and is also used to provide a support frame for the lateral movement of the step parts to adjust the step size; second, the step part itself has the function of adjusting the height to adjust the step height, in addition, an inner support frame is arranged below the step part, which is used to control the overturning of the step part, so as to realize the transformation between the steps and the slope. Since the action ability of different patients is different, and the gait size required in different rehabilitation stages is different, the physical therapy ladder can adjust the state of the step part through its own structure, so as to meet different use requirements, in addition, it can also be transformed into a slope for the patient to walk on the slope.

The utility model relates to the technical field of stairs, and provides a stair preassembling structure which comprises a square frame, square blocks are fixedly connected to the top of the outer surface, close to the periphery, of the square frame, first threaded rods are movably embedded into the inner walls of the multiple square blocks, and a square plate is arranged at the top of the outer surface of the square frame. The square plate is taken up and then placed over the square frame, then the first threaded rods on the periphery are rotated to move on the inner wall of the square block, the first threaded rods drive the round blocks to move towards the square plate after moving, the square plate can be fixed after moving, and the square plate and the square frame form a whole after being firmly fixed. The lifting column is inserted into the hollow column on the other square frame, the insertion depth can be adjusted according to the height of the step needing to be installed after insertion, the deeper the step inserted into the hollow column is, the lower the height of the step is, and the shallower the step inserted into the hollow column is, the higher the height between the steps is.

The application provides a stepped shaft elongation and distribution method and a stepped shaft, and relates to the technical field of forging elongation, which aims at improving the elongation and distribution precision of the stepped shaft. The stepped shaft elongation and distribution method comprises the following steps: setting a distribution starting point on a blank for elongation of the stepped shaft; determining the distance value Y from the contact starting position of the blank and the distribution end of the elongation die to the end surface of the distribution end of the elongation die after determining the distribution and pressing amount X of the elongation die according to the selected elongation die and the blank for elongation of the stepped shaft, wherein X=2H, and H is the step height of the pre-shaped stepped section of the stepped shaft; determining the distance value L0 from the end surface of the distribution end of the elongation die to the distribution starting point of the blank before distribution of the blank according to the distance value Y and the pre-shaped stepped section length L of the stepped shaft, wherein L0=L-Y; and placing the blank according to the distance value L0, so that the distance from the distribution starting point of the blank to the end surface of the distribution end of the elongation die is L0. The application can better ensure the quality of the stepped shaft.

The present application belongs to the technical field of bridge engineering support height adjustment, and relates to a stepped automatic height adjustment support height engagement adjustment and multi-step adjustment method, which comprises the following steps: lifting a fixed stepped block to a preset height, wherein the preset height is greater than a target height by no more than a stepped height; keeping the lifting state of the fixed stepped block, and driving a movable stepped block to move horizontally to abut against the vertical surface of the fixed stepped block; keeping the position of the movable stepped block, and releasing the lifting of the fixed stepped block, so that the fixed stepped block falls and sits on the movable stepped block. Through the cooperation logic of the vertical preset height and the horizontal abutment, the present application reduces the vertical lifting displacement control precision requirement, and the fixed stepped block and the movable stepped block always remain in a close engagement state after the height adjustment is completed, so as to ensure that the tooth force transmission area is maximized, and the present application is suitable for the height adjustment scene of the change of the bridge girder or the pier top elevation.

The present invention discloses an adjustable general staircase mold, which includes a base. The base is a base with adjustable length and width. A support plate is provided on the top of the base, and the top of the support plate is serrated. The tips of the serrations are hinged to the bottom surfaces of a group of tread plates. The rightmost tread plate in the group of tread plates is connected to the upper rest platform module, and the rightmost tread plate in the group of tread plates is connected to the lower rest platform module. Side templates are provided at both ends. The present invention can conveniently adjust parameters such as the length, width, number of steps, step height, and the protruding length of the rest platform of the staircase mold according to production needs, and can adapt to the pouring requirements of different staircases. After the precast staircase produced is transported to the construction site, it can be directly installed. There is no need to support templates on site, nor to water and cure, saving water resources and curing time, and greatly shortening the construction period.

The utility model provides a step frame feeding device, a step frame is provided with heat dissipation through holes, the feeding device comprises a supporting plate and a guide column, and the step height of the upper surface of the guide column is matched with the step height of the step frame; the guide columns are at least located on the upper surface of the supporting plate, the extending direction of the guide columns is perpendicular to the upper surface of the supporting plate, and after the step frame is placed on the supporting plate, the guide columns penetrate through the heat dissipation through holes to limit the step frame. According to the step frame feeding device, the guide columns penetrate through the heat dissipation through holes to limit the step frames, so that the step frames are prevented from inclining, the step frames can be sucked by the plane frame adsorption device, the equipment compatibility of the adsorption device is improved, the plane frames and the step frames can be sucked, the equipment purchasing cost is reduced, and the production efficiency is improved. The cost is reduced; in addition, plane frame welding products and step frame welding products can be rapidly switched, and the equipment production utilization rate is effectively improved.

The utility model discloses a high-precision testing fixture for detecting the height of a step in a hole. An eccentric bushing support (3) and a support (8) are fixedly arranged on the left side and the right side of the top of a bottom plate (2); the top of the support (8) is sleeved with a gauge sleeve (10), and a dial indicator (9) is installed in the gauge sleeve (10). The top of the eccentric sleeve support (3) is sleeved with the eccentric sleeve (5), the rotating rod measuring head (4) is installed in the eccentric sleeve (5), the outer side of the right end of the rotating rod measuring head (4) is sleeved with the spring (6), and the right end of the rotating rod measuring head (4) is sleeved with the locking nut (7). The device is simple in structure and convenient to operate.

This application relates to an adjustable, age-friendly step, comprising a base layer and step units disposed on the base layer. Each step unit includes two step groups, staggered vertically. Each step group includes a lower step and an upper step. The lower step is fixedly disposed on the base layer, and the upper step is disposed on the lower step. A first connecting rod is hinged to the lower step, and a second connecting rod is hinged to the upper step. The first and second connecting rods are hinged together. A support component is provided on the lower step to drive the upper step to slide away from the lower step. A limiting component is provided on the first connecting rod to prevent relative rotation between the first and second connecting rods. A drive source is provided on the lower step to drive the first connecting rod to rotate, and a drive component is provided on the upper step to drive the second connecting rod to rotate. This application facilitates step height adjustment, making it easier for the elderly or people with leg disabilities to walk on steps.