62results about How to "Guaranteed to be centered" patented technology

The invention relates to a vertical tube type falling-film evaporator. The vertical tube type falling-film evaporator comprises an upper tube box, a lower tube box, a casing, multiple heat exchange tubes, an upper tube plate and a lower tube plate, wherein a solution inlet and a secondary steam outlet I are arranged at the upper tube box, a concentrated liquid outlet and a secondary steam outlet II are arranged at the lower tube box, a steam inlet is arranged at the upper part of the casing, and a condensed water outlet is arranged at the lower part of the casing; a film distributing device used for distributing a solution on the inner walls of the heat exchange tubes is arranged in the upper tube box; the film distributing device comprises a liquid bearing plate, a liquid feeding plate, a liquid distributing plate and liquid guiding tubes. By means of a steam stripping effect generated by secondary steam and liquid films, the heat transferring push force and the evaporation efficiency are increased. The liquid films can be uniformly distributed by the film distributing device, the film forming is stable, the wall drying phenomenon is avoided, the recovery rate of secondary steam produced in an evaporator is high, the recovery is convenient, and the heat transferring efficiency is improved.

The invention discloses a hydraulic casing centralizer and belongs to the field of petroleum and gas development. The centralizer comprises a center pipe, a centralizing connector, a first ball, a pin shaft, a first fixing cover, a liquid cylinder, a fixing screw, a second ball, a second fixing cover, a piston, a hydraulic channel, a valve, a screwed plug, a centralizing arm, an oblique plate and a tension spring. One end of the center pipe is connected with the centralizing connector in a sleeved mode. The other end of the center pipe is connected with the liquid cylinder in a sleeved mode. The piston is arranged between the liquid cylinder and the center pipe. The centralizing arm and the oblique plate are arranged between the centralizing connector and the liquid cylinder in sequence. According to the hydraulic casing centralizer, after cement injection, pressure accumulating is carried out in a casing, the piston pushes the oblique plate to move, the centralizing arm is pushed forcibly to move outwards to be supported to a well wall by moving of the oblique plate, a casing string is forced to be in the center, the fact that the horizontal well casing is centered is effectively guaranteed, cement ring uniformity between the casing and a well hole is guaranteed, accordingly, well cementation quality is improved, in addition, the hydraulic casing centralizer is convenient to mount and easy to use, extra construction equipment is of no need, and therefore wide application prospect is achieved.

The invention discloses a camera control method and display equipment, and the method comprises the steps: enabling a controller to carry out the recognition of a specified image collected by a camera, ing a portrait region position, and calculating the azimuth distance between the region center of the portrait region position and the image center of the specified image; if the azimuth distance exceeds an azimuth set threshold, calculating a target adjustment angle of the camera according to the azimuth distance and shooting parameters of the camera; and adjusting the shooting angle of the camera based on the target adjustment angle of the camera, so as to enable the portrait of the person to be located in the central area of the specified image acquired by the camera. Visibly, according to the method and the display equipment, character position information is accurately recognized through camera image detection, the portrait position is automatically focused and positioned, the shooting angle of the camera is finely adjusted from the horizontal direction and the vertical direction, the portrait of the character is located in the center of the image shot by the camera, and therefore it is guaranteed that the character in the displayer image is centered.

The invention discloses a coal mine roof panel deep hole pre-splitting blasting method. The coal mine roof panel deep hole pre-splitting blasting method comprises a step of installing a plurality of energy-gathered tubes which are full of explosives inside a deep drill hole of a roof panel; and the step comprises the following steps of: (S1) installing a first energy-gathered tube; (S2) installingan energy-gathered tube connecting device; (S3) installing a next energy-gathered tube; (S4) repeating the step (S2) and the step (S3), and installing the other middle energy-gathered tubes; (S5) installing the last energy-gathered tube provided with a clamping slot, repeating the step (S2) and the step (S3), installing detonators and connecting detonating cords; and (S6) pushing the energy-gathered tube provided with the clamping slot to the bottom of the drill hole by using an energy-gathered tube orienting device. The invention provides a coal mine roof panel cutting method which can effectively solve the problem about suspension of a roof panel; the suspended roof panel becomes broke waste rocks; and the problem about roof panel rotation pressure caused by suspension of the roof panelis effectively solved.

The invention relates to a pick-up head visual angle adjusting method and apparatus, and belongs to the technical field of image processing. The method comprises the following steps: obtaining a reference image shot within a visual angle of a pick-up head; performing graying on the reference image; for each reference line on the reference image, calculating the sum of a gray value of each pixel point on the reference line, and obtaining a total gray value of the reference line, wherein the reference line is one from a row and a column on the reference image; and according to the total gray value of each reference line, prompting to adjust the visual angle of the pick-up head. According to the invention, the problem of unreasonable composition existing in an image obtained when a user adjusts the shooting visual angle of the pick-up head according to his own feeling is solved; and the effects of improving user experience by prompting the user to adjust the visual angle of the pick-up head when the composition of the image shot by use of the pick-up head is unreasonable.

The invention discloses a press machine for bearing installation. A cuboid-shaped lower supporting seat is formed at the center of the upper end surface of a supporting base, a rectangular-groove-shaped workpiece placement groove is formed in the upper end surface of the lower supporting seat, and telescopic holes penetrating inside and outside are formed perpendicularly in the middle parts of thefour side walls of the workpiece placement groove; a rectangular-groove-shaped lifting groove is formed in the lower end of the lower supporting seat; vertical-upward vertical moving grooves are formed in the middle parts of the peripheries of the upper side wall of the lifting groove correspondingly; the upper ends of the vertical moving grooves are in communication with the telescopic holes; aworkpiece limiting device includes a limiting lifting block, the limiting lifting block is arranged in the lifting groove in lifting-lowering modes, and four limiting press blocks matched with the vertical moving grooves are formed on the upper end surface of the limiting lifting block; and telescopic connecting rods are movably arranged in the telescopic holes, spring limiting plates are formed at the outer ends of the telescopic connecting rods, and workpiece limiting plates are formed at the inner ends of the telescopic connecting rods.

The invention relates to a rotational flow shoe which comprises a hollow shell, a hollow connecting pipe is detachably mounted at the downstream end part of the shell to form a fluid passage, a rotational flow passage penetrating through the side wall of the connecting pipe is also formed in the connecting pipe, a differential pressure type valve capable of cutting off or communicating the fluid passage is fixedly arranged inside the shell, and a bearing slide block which can move in the axial direction and cover the rotational flow passage is arranged inside the connecting pipe and is connected with the connecting pipe through a cutting pin. The rotational flow shoe has the benefits that the pressure resistance is higher, and the rotational flow shoe is not affected by the cleanness of well fluid.

The invention relates to an SCR rotational flow mixing pipe, and belongs to the technical field of engine aftertreatment. The invention aims to solve the problems of non-uniform distribution after urea is sprayed into a mixing pipe, low urea decomposition rate, high crystallization risk caused by urea spray wall contact in the mixing pipe, and the like. According to a spiral pipe structure of the SCR rotational flow mixing pipe, turbulence can be formed in the mixing pipe at the rear end, so that the decomposition rate of the urea in the mixing pipe is increased, and the urea crystallization risk is reduced. Meanwhile, rotating airflow generated by the spiral pipe structure can form a large amount of rotating airflow around the inner wall of the mixing pipe, and the urea solution sprayed to the inner wall of the mixing pipe is carried away, so that the urea crystallization risk is further reduced; and urea spraying points of the SCR rotational flow mixing pipe are arranged in the middle, so that the distribution uniformity of the urea in the mixing pipe can be improved, and finally the NOX conversion efficiency of an SCR system is improved. The urea spraying points are arranged in the middle to be matched with the mixing pipe with the rear end increasing the pipe diameter, so that the urea solution can be effectively prevented from contacting the wall, and the urea crystallization risk is reduced.

The invention provides a foam line starching device, belonging to the field of production equipment of architectural decoration lines. The foam line starching device comprises a workbench, a positioning guide device and a scraping device, wherein the workbench is provided with a horizontal working surface; the positioning guide device comprises a vertical extrusion mechanism, a positioning plate and a transverse extrusion mechanism, the vertical extrusion mechanism is used for pressing a foam line on the workbench, and the positioning plate and the transverse extrusion mechanism are used for extruding the foam line from the two sides; the positioning guide device can enable the foam lines to keep linear motion, and the thickness of coated mortar is uniform; the scraping device comprises a mortar groove and a material pressing mechanism, the mortar groove is used for coating mortar on the surface of the foam line, and the material pressing mechanism is used for compacting the mortar coated on the surface of the foam line. When passing through the mortar groove, the foam line orderly passes through a feeding inlet, a feeding outlet and a material pressing outlet of which the sizes are orderly increased; after the foam line passes through the feeding outlet, the surface of the foam line is coated with thick mortar; after the foam line is extruded by the material pressing mechanism, the mortar on the two sides of the foam line becomes thinner and more compact and is not easy to fall off.

The invention relates to an intelligent auxiliary locating indicating car for engineering machinery assembling. The intelligent auxiliary locating indicating car comprises a stretching pressing locating frame, a sensing arm telescopic frame and a moving direction indicating screen. The sensing arm telescopic frame is fixedly connected to the upper end of the stretching pressing locating frame. The moving direction indicating screen is arranged above the sensing arm telescopic frame in a covering mode. The stretching pressing locating frame comprises a base plate. Supporting legs are fixed at the lower end of the base plate. Universal balls are arranged at the lower ends of the supporting legs. An oil cylinder is fixedly arranged in the middle of the upper end face of the base plate. The sensing arm telescopic frame comprises a top plate. The moving direction indicating screen comprises an upper cover. A displaying screen and a keyboard are arranged on the upper end face of the upper cover. Manpower is replaced for detecting the up-load position of engineering machinery, direction guidance is provided for lifting assembling personnel, the problem that assembling personnel observe the position, relative to an engineering machinery bottom disc, of an up-load part of the engineering machinery beside the engineering machinery is avoided, manpower is reduced, the safety coefficient of the assembling personnel is improved, and working efficiency is improved.

The invention discloses a horizontal well automatic anchor release hydraulic righting device, which comprises a front joint, a center pipe, a piston pipe, a rear joint and a righting sleeve. The front end of the righting sleeve slidably sleeves the rear end of the upper joint, and the rear end of the righting sleeve slidably sleeves the front end of the piston pipe; a plurality of through holes are formed in the surface of the righting sleeve, and a plurality balls are assembled between the inner side of the righting sleeve and the center pipe; and the diameter of the balls is larger than the aperture of the through holes, and the ball surface of each ball can stretch out from the corresponding through hole. The horizontal well automatic anchor release hydraulic righting device can keep the small diameter under the normal state, supporting righting is conducted only during setting of a string, passive righting is achieved, during pulling of the string, automatic anchor release recovery can be conducted when the internal high pressure disappears or the external pressure is high, and the jamming risk of the string can further be reduced while it is ensured that the down-hole string is centered.

The invention provides an automatic clear-up packing machine. The automatic clear-up packing machine comprises a conveyor belt; the conveyor belt is sequentially provided with a first automatic separating device, a second automatic separating device, a third automatic separating device and a shaping mechanism from left to right; a blanking device is arranged on the conveyor belt, and the right side of the blanking device is provided with a clapboard which is connected with a telescoping rod; one end of a machine shell is connected with the conveyor belt, and the other end of the machine shell is connected with a slide rail, the bottom of the slide rail is provided with a baling box, and the bottom of the baling box is provided with a weighing machine. The automatic clear-up packing machine has the beneficial effects that the clear-up efficiency is high, and the labor intensity of workers is reduced, so that the production efficiency of a production line is improved; the automatic clear-up packing machine is suitable for continuous production.

The present disclosure relates to a camera viewing angle adjustment method and device, and belongs to the technical field of image processing. The method includes: acquiring a reference image captured within the viewing angle of the camera; graying the reference image; and calculating the gray value of each pixel on the reference line for each reference line on the reference image sum, to obtain the total gray value of the reference line, the reference line is one of the rows and columns on the reference map; according to the total gray value of each reference line, it is reminded to adjust the camera’s perspective. It solves the problem that the image obtained when the user adjusts the camera angle of view according to his own feeling still has an unreasonable composition problem; realizes that when the image composition obtained by using the camera is unreasonable, the user is reminded to adjust the camera angle of view to achieve In order to improve the effect of user experience.

Disclosed is a hydraulic casing centering device used for centering a casing in a well cementing and completion technology. The hydraulic casing centering device comprises a body, a driving mechanismand a centering mechanism, wherein the body is a tubular structural piece provided with a central hole and connected to the casing; the driving mechanism comprises a piston and a piston cylinder sleeve, the piston cylinder sleeve is mounted on the body in a sleeving mode and fixedly connected with the body, an accommodating cavity is formed between the piston cylinder sleeve and the body, the piston is mounted on the body and located in the accommodating cavity, the body is provided with a liquid inlet hole, and the liquid inlet hole communicates with the central hole and the accommodating cavity; and the centering mechanism is mounted on the body and comprises a centering device body and a taper sleeve, one end of the centering device body is connected with the piston, the other end of the centering device body abuts against the taper sleeve, and the taper sleeve is fixed to the body, and the centering device body can climb upwards along the outer conical surface of the taper sleeve.