47results about How to "Prevent up and down" patented technology

The invention discloses a plugging device which comprises a central pipe, a power mechanism, an anchoring mechanism, a rubber sleeve, a balancing mechanism and a locking mechanism sleeved on the central pipe, wherein a liquid outlet is formed on the central pipe; the anchoring mechanism comprises a first slip mechanism and a second slip mechanism; the power mechanism comprises a hydraulic cylinder sleeve, an upper sitting seal piston and a lower sitting seal piston; the hydraulic cylinder sleeve sleeves on the exterior of the central pipe; under the hydraulic effect, the power mechanism can push the first slip mechanism, the second slip mechanism and the rubber sleeve to seal in a sitting form; the locking mechanism can prevent the rubber sleeve from rebounding, so as to maintain the sitting seal state of the rubber sleeve; the balancing mechanism comprises a balancing cylinder and a balancing piston; the balancing cylinder sleeves on the exterior of the central pipe; the balancing piston is located in the balancing cylinder; a pressure inlet which is introduced to the position under the balancing piston is formed under the rubber sleeve; the balancing piston can move so as to balance the pressure under the rubber sleeve under the sitting seal state.

The invention relates to a novel gamma ray detection device. The novel gamma ray detection device comprises a gamma ray inspection machine, a source conveying pipe, a focal length adjusting pipe, a directional exposure head and a lead plate shielding ring, wherein one end of the source conveying pipe is connected with the gamma ray inspection machine, and the other end of the source conveying pipe is communicated with the directional exposure head; the focal length adjusting pipe is screwed to the lead plate shielding ring, and the directional exposure head is located in the lead plate shielding ring so as to irradiate a to-be-inspected position of a to-be-tested pipeline; the outside of the to-be-tested pipeline is fixedly sleeved with the lead plate shielding ring, and first lead rubber for packaging two sides of the to-be-inspected position of the to-be-tested pipeline is arranged between the lead plate shielding ring and the to-be-tested pipeline; the outsides of the source conveying pipe and the focal length adjusting pipe are coated with second lead rubber. According to the novel gamma ray detection device, the radiation range can be effectively narrowed, the safety performance is relatively high, the use is relatively convenient, and particularly, the radiation level out of range of 2m can be basically in a safety range.

The invention discloses an electric scaffold device capable of being controlled to ascend and descend intelligently for indoor construction. The electric scaffold device comprises a fixed frame; a balance device is arranged above the fixed frame; a fixing device is arranged below the fixed frame; hydraulic ascending and descending supporting leg devices are arranged below a fixed base; detachablefixing devices are arranged on the surfaces of the outer sides of the fixed cylinders; a controller is arranged on the upper surface of a pedal plate; a signal receiving end of the controller is electrically connected with a level sensor and a pressure sensor; a power output end of the controller is electrically connected with a micro-linear motor, a hydraulic oil pump and a hydraulic electromagnetic valve. The electric scaffold device has the beneficial effects of simple structure and high practicability.

The invention provides a gasoline odor adsorption and purification apparatus. The gasoline odor adsorption and purification apparatus comprises an air bellow filter screen, positioning plug boards, aplug bush, an air draft tube, a fan downward sliding track, a fan and a fan downward sliding support, wherein four fan cover positioning plug boards are circularly welded on the oblique circumferential outer wall of an exhaust hood in a penetrating manner, and the top ends of the four fan cover positioning plug boards extend upwardly in a supporting manner and are provided with one downward sliding limiting board; a top-end active carbon filter screen is circularly arranged, four filter screen supporting plug boards are circularly welded on the circumferential outer wall of an annular supporting framework of the top-end active carbon filter screen in an array manner, a rectangular plug hole is formed on each filter screen supporting plug board in a penetrating manner, and the top-end active carbon filter screen is arranged on the four fan cover positioning plug boards by virtue of the four filter screen supporting plug boards and urges the top ends of the four downward sliding limitingboards. By arranging the four fan cover positioning plug boards, the four fan cover positioning plug boards not only have a downward sliding positioning function when the exhaust hood is assembled ina plugging manner, and also have a function for pressing and positioning the fan.

The invention relates to the technical field of aluminum plastic door and window sawing equipment, in particular to sectional material sawing equipment. The sectional material sawing equipment comprises an automatic feeding mechanism, a machine head mechanism and an automatic discharging mechanism, wherein the automatic feeding mechanism, the machine head mechanism and the automatic discharging mechanism are sequentially designed according to the feeding direction of a sectional material; the automatic feeding mechanism comprises a feeding machine frame, a feeding power mechanism on the feeding machine frame is used for controlling a feeding pneumatic claw, one side of the feeding pneumatic claw is provided with a positioning backup plate, an automatic input frame is arranged above the positioning backup plate, a plurality of material supporting and pressing mechanisms are arranged on the automatic input frame, and an initial positioning mechanism is arranged at the tail end of the automatic input frame; the machine head mechanism comprises a machine head frame, a middle working table is arranged on the machine head frame, a left machine head and a right machine head are arranged on the middle working table, a middle horizontal pressing block is arranged between the left machine head and the right machine head, a right machine head receding mechanism is arranged on one side ofthe right machine head, and a working table receding mechanism is arranged on the machine head frame on one side of the middle working table. The sawing equipment has the beneficial effects that the cutting precision is improved, and left and right shaking of the sectional material is avoided.

The invention discloses transportation equipment for a bicycle. The transportation equipment comprises an auxiliary device. The auxiliary device comprises a transmission track belt and two transmission gears. The two transmission gears are located at the two ends of the transmission track belt. The transmission track belt is arranged obliquely. The transmission track belt is provided with a plurality of transportation auxiliary devices. The transportation auxiliary devices are sequentially distributed in the transmission direction. Each transmission auxiliary device comprises a first cushion block and a first stop block, wherein the first stop block is installed at the lower end of the first cushion block, and the first stop block is provided with a limiting face for abutting against the wheels of the bicycle. The bicycle is fixed to the transmission track belt through the transportation auxiliary devices, and the bicycle is held by hand, the phenomenon that people go up and down a pedestrian overpass from a perpendicular elevator is avoided, the perpendicular elevator is prevented from being occupied, and the transmission efficiency of the transmission track belt is high. The transportation equipment is reasonable in structure and can be widely applied to the technical field of lifting apparatuses.

The invention relates to a coaxial adaptive analog high-definition transmission anti-attenuation device and a method based on differential compensation. The device comprises a distortion information analysis module, a differential calculation module, an amplitude control module and a compensation signal superposition module. After original signals are processed through the differential calculation module, original compensation signals are obtained, the original compensation signals are then transmitted to the amplitude control module and are processed by the amplitude control module, compensation signals are then outputted to the compensation signal superposition module, the compensation signal superposition module superposes the compensation signals on the original signals, signals after compensation are fed to a coaxial line for transmission, the superposed compensation signals are used for cancelling distortion signals transmitted by the coaxial line, coaxial control signals are analyzed by the distortion information analysis module, the compensation degree is determined, differential control parameters are outputted to the differential module respectively, and amplitude control parameters are outputted to the amplitude control module.

The invention discloses a brake anti-blocking screw drilling tool with long service life, comprising a well head double-stage filtering device, an upper brake anti-blocking device, a hydraulic motor assembly, a transmission shaft assembly and a lower brake anti-blocking device. The brake anti-blocking screw drilling tool has the advantages as follows: the double-stage filtering is adopted, therefore, the filtering is performed according to particle diameters of impurities, the impurities such as sand grains in different particle diameters can be effectively prevented from entering into the drilling tool through well liquid, the anti-blocking and anti-wearing effects are much better, the service life of the drilling tool is prolonged, the drilling tool is avoided being dismounted due to blocking and wearing, and the work efficiency is improved; when the well liquid passes through, a filter screen plays a role in filtering, and when a pump is stopped, a spring is returned and a valve core is closed so as to play a role in braking, therefore, the well liquid with sand grains can be prevented from flowing back into the drilling tool to cause the blocking of the drilling tool.

The invention discloses a chromatography tank for artemisinin extraction and an efficient pressurized chromatography method thereof and belongs to the field of artemisinin extraction equipment and methods. The chromatography tank comprises a tank body, a gasoline inflow pipe, an extracting solution inflow pipe and an eluent inflow pipe. A feeding gate is arranged on the top of the tank body. A discharging door is arranged on one side of the lower portion of the tank body. A material supporting screen is arranged on the lower portion in the tank body. A compressed air inlet and an air blowoff valve are arranged on the top of the tank body. The bottom of the tank body is connected with a main discharge pipe, a main valve is arranged on the main discharge pipe, the lower end of the main discharge pipe is communicated with an agent checking transfer tank, and the transfer tank is connected with multiple classification discharge pipes. The efficient pressurized chromatography method includes the steps of A, material preparation; B, whole column liquid level reducing; C, column feeding; D, first pressurizing extracting solution liquid level reducing; E, second pressurizing eluent liquid level reducing; F, eluting without an agent; G, eluting with the agent; H, third pressurizing eluent liquid level reducing. The agent content of eluent can be precisely detected, washing liquor is recovered in a classified mode, the utilization rate of the washing liquor containing the agent is increased, and the production period is shortened.

The invention provides a refrigerator door and a refrigerator. A clamping groove is formed in the surface of a liner of the refrigerator door, a door seal is arranged in the clamping groove, and stopping ribs are arranged on the peripheral sides of the clamping groove. According to the refrigerator door, inward movement and outward movement of the door seal can be prevented through the clamping groove, and up-and-down movement and left-and-right movement of the door seal can be effectively prevented through the stopping ribs, so that the effect of sealing between the refrigerator door and a refrigerator body of the refrigerator is good, and the heat preservation effect and the heat isolation effect of the refrigerator door are accordingly guaranteed. The fixing effect and the protecting effect on the door seal can be achieved through the stopping ribs, and displacement, edge overturning and the like of the door seal are prevented; in addition, scraping and collision to the door seal caused by the problem that the door seal is exposed out when a user takes foods can be effectively avoided, and therefore the service life of the door seal is prolonged.

The invention discloses a material belt scribing-cutting device with adjustable cutter height and scribing interval. The scribing-cutting device comprises a longitudinal track beam, and an outer trackis formed in the middle of the front side face of the track beam. An inner guide hole same as the vertical section of the track beam is formed in the middle of each interval adjusting assembly and the inner guide holes are attached to all the surfaces of the track beam; fastening pieces are in threaded connection with first threaded through holes of front clamping plates, and the front ends of the fastening pieces are attached to the outer track in a compressed manner; the rear side face of each rear clamping plate is in threaded connection with a vertical sliding rail; a sliding block is installed at the upper end of the inner side face of a clamp of each height adjusting assembly; two compression springs are arranged between each sliding block and a corresponding limiting baffle; each height adjusting handle is vertically in threaded connection to an adjusting end plate; the lower moving end of each height adjusting handle is attached to the upper surface of the corresponding clampin a compressed manner; and an expansion plate of each elastic clamping assembly can deform to generate an expansion force, so that blades are fixed in cutter cavities of the clamps. The material beltscribing-cutting device with the adjustable cutter height and scribing interval has the effects of stepless adjustment of the longitudinal intervals of the blades and accurate adjustment of the height of the blades.

The invention discloses a special grid for a raw material feeding ground bin. The special grid comprises a grid body, elastic block ground mats arranged at the four corners of the grid body, elastic blocks arranged at the upper ends of the elastic block ground mats, an exciter body arranged on the bottom edge of the grid body, and a cleaning plate arranged on the side edge of the grid body. Through the special grid for the raw material feeding ground bin, the problems that the feeding efficiency is low, and manual poking by personnel is unsafe are effectively solved.

The invention discloses a lying packaging structure and packaging method for a washing machine. The packaging structure comprises a top lining arranged at the top of the washing machine, a bottom lining arranged at the bottom of the washing machine, and a bucket lining arranged in an inner bucket of the washing machine. The packaging structure is characterized in that corner linings are inserted in four corners of the bottom lining; and the top lining and the bottom lining are fixed in an insertion manner through the corner linings. The lying packaging structure and packaging method for the washing machine have the beneficial effects that the support strength of a gasket during packaging is increased, and damage to the washing machine in a transport process is effectively avoided; and up-down movement of the inner bucket of the washing machine can be prevented, so that lying transport for the washing machine is realized, transport expense is reduced, and quality loss is reduced.

The invention relates to a sedimentation tank for industrial sewage treatment, which comprises a main body, a pressure relief mechanism and a buffer mechanism, wherein the pressure relief mechanism is arranged on the main body, the buffer mechanism is arranged in the pressure relief mechanism, the pressure relief mechanism comprises a water inlet pipe, a connecting pipe, a box body and a blocking assembly, the buffer mechanism is arranged on a sleeve, the buffer mechanism comprises a plurality of buffer assemblies, the buffer assembly comprises a buffer unit and a plugging unit, and a limiting unit is arranged on the fixing rod. According to the sedimentation tank for industrial sewage treatment, pressure relief is conducted on water through the pressure relief mechanism, and impact force of the water is buffered through the buffer mechanism. Compared with an existing sedimentation tank, the device relieves and buffers the impact force of the water, water slowly flows into the main body, and impurities at the bottom of the main body are prevented from being impacted and turning over up and down, so that the better precipitation effect is achieved. Meanwhile, multiple pressure relief buffering is conducted through the pressure relief mechanism and the buffer mechanism, so that the better pressure relief buffering effect is achieved, and the practicability is improved.