111results about How to "Frictional" patented technology

A pipette includes a tubular body (1) having an internal circumferential threaded portion (1b); a stroke screw (5) provided inside the body (1) and having an external circumferential threaded portion (5c) for thread-engaging said internal circumferential threaded portion (1b); a volume variably setting member (4) disposed to be rotatable together with the stroke screw (5) as one unit and axially slidable relative thereto; a central shaft (7) provided inside said tubular body (1), which is coupled to a plunger (29) and operable to be pushed down; and a first-stage spring (10) interposed between an upper portion of said central shaft (7) and said stroke screw (5), which urges the central shaft (7) upward so that a predetermined portion (7b) thereof urgingly abuts against the stroke screw (5), wherein, by rotating said volume variably setting member (4) as appropriate, the stroke screw (5) is caused to rotate together therewith as one unit relative to the body (1) so that said stroke screw (5) and said central shaft (7) axially slide together as one unit apparently by a predetermined amount, thereby variably setting a suction volume of said pipette.

A plunger sealing mechanism includes an O-ring retention ring (101) fitted around said plunger (29); a seal ring (102) fitted around said plunger (29); an O-ring (103) interposed between said O-ring retention ring (101) and said seal ring (102); and an O-ring pressing spring (104) which axially presses said O-ring retention ring (101) with a predetermined force to press said O-ring (103) against an inclined inner surface (121a) of a tubular cylinder member (121) so that said seal ring (102) is radially inwardly pressed against an outer peripheral surface of said plunger (29) by a component of said predetermined force that is in a direction perpendicular to the axis of the pipette, wherein an inclination angle α of said inclined inner surface (121a) is 40° to 65° relative to the direction perpendicular to the axis of the pipette.

The invention belongs to the technical field of core-spun yarns and particularly relates to a multi-coating core-spun yarn and a preparing machine thereof. The preparing machine comprises a rack, a rotating disc is rotationally connected to the rack and connected with a driving mechanism, a central yarn tube is fixedly arranged on the rotating disc in a penetrating mode, at least one spindle located on the periphery of the central yarn tube is arranged on the rotating disc, and the spindles are used for carrying bobbins. The rotating disc is further fixedly provided with a plurality of yarn passing needle tubes for covering yarns released from the bobbins to penetrate through from bottom to top in a penetrating mode, the yarn passing needle tubes correspond to the spindles one by one and are located between the spindles and the central yarn tube, and the heights of the yarn passing needle tubes are gradually increased or decreased clockwise or anticlockwise in the circumferential direction so that the covering points of the covering yarns and a core yarn can be sequentially arranged side by side in the axial direction of the core yarn. The multi-coating core-spun yarn and the preparing machine thereof have the advantages that the yarn passing needle tubes are arranged in the circumferential direction, the heights of the yarn passing needle tubes are sequentially increased or decreased, a strip shape is formed after all the covering yarns are arranged side by side together, it is ensured that no gap appears between the covering yarns, the production efficiency can be easily improved, and energy consumption can be reduced.

The invention relates to a bi-directional aerating high pressure inflator, which comprises an inflator body and a piston, wherein the piston divides an internal space of the inflator body into an upper air chamber and a lower air chamber; and an upper cover is arranged on an upper part of the inflator body. The bi-directional aerating high pressure inflator is characterized in that a valve hole communicated with the upper air chamber and outside is formed in the upper cover; a plurality of fillets arranged at intervals along the circumference are formed on an inner hole wall of the valve hole along a radial direction; a valve cover capable of sliding up and down is arranged in the valve hole; a plurality of downwards extending guiding bars arranged at intervals along the circumference are arranged under the valve cover; and a hook part tapped with an inner top wall of the upper cover is arranged on the outer sides of the bottom parts of the guiding bars. When pressure generated by air pressure of the upper air chamber on a valve cover is larger than frictional force between the valve cover and an inner wall of the valve hole, the valve cover is pushed to move upwards, the valve hole is at an open state, a grip is pulled upwards in a labor saving manner, without a support force of a spring, the valve cover is at a loosening state, the grip is pulled upwards again, the valve cover can be opened easily, the inflator is changed to be in a one-way inflating mode, and when the inflator is inflated to be with a certain pressure by inflating equipment, the way that the grip is pulled upwards is still labor-saving.

The invention relates to the technical field of medical instruments and discloses a flexible drive element, an end effector and a surgical operating instrument. The flexible drive element comprises a head portion, a tail portion and a plate stress bending portion, the plate stress bending portion between the head portion and the tail portion and comprises a plurality of metal filaments and a flexible seal sleeve, and the flexible seal sleeve covers the plurality of metal filaments which extend along the length direction of the flexible drive element. In the technical scheme, the plurality of metal filaments enable the stress bending portion to have certain rigidity and flexibility and can be relatively fixed by the flexible seal sleeve, and accordingly surface friction of the flexible drive element can be reduced, and rigidity of the flexible drive element can be further improved. The flexible drive element is capable of effectively transferring driving forces required by instruments and less prone to destructive permanent deformation during turning, triggering and retracting, and accordingly difficulty in operation of surgical operating instruments is greatly lowered for surgeons, and simplicity and convenience in a machining process are achieved due to reduction of a welding procedure.

The invention discloses a pipe winding machine for a condenser coil pipe. The pipe winding machine for the condenser coil pipe comprises a bottom plate, wherein two supporting plates are welded to thetop of the bottom plate; a winding roller is rotatably installed between the two supporting plates; limiting plates sleeve two ends of the winding roller; the limiting plates are fixedly connected with the winding roller; a first bidirectional motor and a second bidirectional motor are fixedly installed on the bottom plate; an output shaft of the first bidirectional motor is fixedly connected with the winding roller; and two horizontally arranged guide rods are fixedly installed between the two supporting plates. A screw rod is rotatably installed between the two supporting plates, a moving plate is slidably installed on the guide rod, the moving plate is in threaded connection with the screw rod, an output shaft of the second bidirectional motor is fixedly connected with the screw rod, and the top of the moving plate is separately welded to a first side plate and a second side plate. According to the pipe winding machine for the condenser coil pipe, the uniform winding of a pipe is ensured, and meanwhile, the pipe is in a tight state in the winding process through a clamping mechanism, so that relaxation cannot occur, the pipe winding effect is good, the use is convenient, and the popularization is easy.

The invention discloses an improved rubber roll device and a manufacturing method thereof. The rubber roll device comprises a rotating shaft (0) and a rubber roll (3) which is coaxially and fixedly arranged outside the rotating shaft (0), wherein the rubber roll (3) is made of PU (Polyurethane) material and air pores (31) are uniformly and densely formed in the rubber roll (3). The manufacturing method of the rubber roll device comprises the following steps of: combining the axis (0) and a forming mould to form a heating mould assembly; mixing and stirring PU prepolymer, a hardening agent and water; filling mixture of a flow 20 into the heated mould; hermetically standing the mould assembly with filled mixture; and taking the rubber roll device comprising the axis (0) and the rubber roll (3) out of the mould. The rubber roll device and the manufacturing method thereof have the advantages that the rubber roll material is PU and the air pores are uniformly and densely formed in the rubber roll, so that the physical structure of the rubber roll is a tough anti-skid rough surface from inside to outside, i.e., the outer surface of the rubber roll is an anti-skid rough surface and has friction force in spite of the diameter of the worn rubber roll.

The invention discloses a plank flatness detection device, which comprises a base, on which a support rod is arranged, and a cross bar is arranged between two adjacent support rods along the length direction of the base, and the adjacent two cross bars are at the same On the plane; there is a moving block on the cross bar, the moving block and the base are attached to each other, a horizontal bar is set between two adjacent moving blocks, a detection plate is set on one side of the horizontal bar, and a center line is set on the side of the detection plate , the side of the detection board is provided with a fixed shaft, the fixed shaft is rotatably connected with an indicating plate, the indicating plate is arranged above the base, and an indicating arrow is arranged on the side of the indicating plate, and the indicating arrow points to the center line. The invention effectively eliminates unqualified wooden boards, effectively controls the flatness of the wooden boards, avoids cracks or falling off of the decorative paint on the wooden boards, improves the decorative effect, and directly displays the decorative surface in front of the user in the form of appearance, and has functional External performance and aesthetic function.

The invention relates to a clamping device, in particular to a clamping device for electronic element welding; the clamping device for electronic element welding solves the technical problem that a worker does not need to hold the electronic element by hands, the safety is high, the electronic element can be fixed, and the electronic element can be prevented from moving. The clamping device comprises a base, supporting legs, a first bearing block, a rotating shaft, a hinging seat, a connecting block, a hollow sleeve and a connecting rod; two supporting legs are connected to the left side and the right side of the bottom of the base; the first bearing block is arranged on the right side of the top of the base. According to the clamping device, the electronic element can be fixed through anarc-shaped clamping plate, so that the electronic element is prevented from moving; the electronic element does not need to be held by a worker by hands, and the safety is relatively high; the devicecan be fixed through the fixing mechanism, so that the influence of the work of workers caused by inclination of the device when the electronic element is welded is avoided.

The invention discloses an embedded dual restorer for heavy metal soil improvement, and belongs to the technical field of soil restoration, a microbial soil restoration agent can be periodically injected into an improver embedding box through cooperation of the improver embedding box and a plurality of U-shaped seepage rods, and the microbial soil restoration agent is guided into soil from a plurality of filter holes in the U-shaped seepage rods, so the diffusion balance degree of the microbial soil adsorbent is effectively improved; the microbial soil remediation agent has the effects of directly or indirectly improving soil, restoring soil fertility, preventing soil-borne diseases, maintaining rhizosphere microflora balance, degrading toxic and harmful substances and the like, and is matched with the attapulgite buried rod arranged on the outer side of the U-shaped material seeping rod; the attapulgite buried rod is matched with a plurality of heavy metal adsorption balls arranged outside the attapulgite buried rod in a sleeving mode, so the effects of gathering, adsorbing and passivating heavy metal in soil are achieved; the operation is easy, convenient and feasible, the improvement and adsorption are combined, and the remediation effect on the heavy metal soil is effectively improved to a certain degree.

The invention relates to a stereoscopic scouring pad comprising base cloth woven of warps and wefts. The scouring pad is characterized in that the base cloth is provided with weave repeat units composed of a floating zone of jacquard warps or wefts, and the weave repeat units are repeatedly arranged in the warp and weft directions to form a stereoscopic pattern; the base cloth is stacked on multiple mesh layers formed by single weaving; the base cloth is connected with the mesh layers through binding at the periphery. According to the scouring pad, the warps or wefts float to form different stereoscopic patterns, the patterns are combined with double mesh layers or multiple mesh layers formed by single weaving to form multilayer mesh fabric, with one side being abrasive and the other side absorbing water fast; the scouring pad is fine in water absorption and oil absorption, friction coefficient of the scouring pad is increased, the scouring pad rarely damages, and the service life of the scouring pad is prolonged.

The invention discloses a high-performance PE film as well as a preparation method and application thereof. The high-performance PE film comprises an outer layer, a middle layer and an inner layer, and the outer layer is prepared from the following raw materials: low-density polyethylene, linear low-density polyethylene, metallocene linear low-density polyethylene, a polyolefin elastomer, a high-molecular-weight light stabilizer, a light screener and an organic anti-blocking agent; and the high molecular weight light stabilizer is one or more of a styrene-acrylic acid piperidine ester copolymer, a p-hydroxystyrene-acrylic acid piperidine ester copolymer or a p-dimethylamino styrene-acrylic acid piperidine ester copolymer. The inner layer is prepared from the following raw materials: low-density polyethylene, linear low-density polyethylene, metallocene linear low-density polyethylene and an inorganic anti-blocking agent. The high-performance PE film has excellent aging resistance and heat resistance, and when water-based ink is used for printing, the drying rate is high, and the anti-sticking phenomenon after false drying does not occur.

An object of the invention is to improve capacity of process and not require a vent portion by an upper polygonal groove and a transition portion provided to a transport cylinder.

A plastic extrusion method and apparatus according to the invention is a method and a configuration, in which an upper polygonal groove and a transition portion are integrally or separately provided to a transport cylinder so as to increase a frictional coefficient of an inner wall of the cylinder, to increase transport efficiency of a plastic raw material by a screw, and to allow at least gas, etc., pass toward a hopper side without using a vent portion.

The invention relates to the field of water pollution treatment, in particular to a floating-raft-type river channel waste collection device, and is intended to solve the above technical problem. A technical scheme used herein refers to a floating-raft-type river channel waste collection device comprising a plurality of floating raft mechanisms across a river channel; an interceptor mesh for intercepting river channel waste is connected between every two floating raft mechanisms; each floating raft mechanism includes a floating frame fixedly connected with the corresponding interceptor mesh. The defects of the prior art are overcome; the floating-raft-type river channel waste collection device capable of moving correspondingly with changes in water level and having higher waste collection rate is provided, solving the problem that an existing river channel waste interceptor is unable to intercept wastes in case of water level changing.

The invention discloses cloth rolling equipment. The cloth rolling equipment comprises a frame body, a cloth winding barrel, a rotating part, a placing cavity and a driving part, wherein the rotatingpart is arranged in the cloth winding barrel in a penetrating mode, the placing cavity is arranged on the rotating part, and the driving part is used for driving the rotating part to rotate; a pressing mechanism for synchronously rotating the cloth winding barrel and the rotating part is arranged on the rotating part, and the pressing mechanism comprises a pressing component and a pushing component, wherein the pressing component is in rotation fit with the inner wall of the cloth winding barrel, and the pushing component is matched with the pressing component; and the pushing component is arranged in the placing cavity. Friction force is generated between the pressing part and the inner wall of the cloth winding barrel, the cloth winding barrel and the rotating part are kept relatively static, and the rotating part can drive the cloth coiling barrel to rotate synchronously, so that the cloth winding barrel is prevented from rotating relative to the rotating part; and a pushing component is arranged to push a pressing component to move, so that the pressure of the pressing component on the cloth winding barrel is improved, and the friction force between the cloth winding barrel andthe pressing component is improved.

The invention relates to the technical field of intelligent leg nursing, in particular to an adjustable postoperative intelligent leg nursing device for the neurosurgery department. The technical problems that an existing leg nursing device can only conduct simple rehabilitation treatment on a patient, blood circulation of the legs of the patient cannot be improved, neuromuscular stimulation cannot be achieved, the legs of the patient cannot be comprehensively nursed, muscle, skeleton and the like of the patient suffer from disuse atrophy, and the physiological function of the leg declines are solved. According to the technical scheme, the adjustable postoperative leg intelligent nursing device for the neurosurgery department comprises a seat, a leg massage mechanism and an ankle moving mechanism, the leg massage mechanism is arranged on the front side face of a seat bottom plate, and the ankle moving mechanism is arranged on the front side face of the seat bottom plate. By arranging the leg massage mechanism, blood of the legs of a patient circularly flows from bottom to top, and diseases such as venous thrombosis of the lower limbs of the patient are avoided; by arranging the ankle moving mechanism, the phenomenon that the physiological function of the legs is declined due to the fact that the patient lies in bed for a long time is avoided.

The invention discloses a remote unlocking device of a telecommunication equipment function, and relates to the technical field of the telecommunication equipment. The remote unlocking device is specifically composed of a computer base, a mounting plate, a computer, a support frame and a cushion block; a sliding chute is formed at an edge of a top end of the computer base, the mounting plate is arranged at an inner wall of a clamping mechanism; first connecting rods penetrate interiors of two sides of the mounting plate, and the computer is screwed on the upper end of a mounting base; the support frame is arranged at a left sidewall and a right sidewall of the mounting base, and a cross bar is welded at the top end of the support frame; a revolving drum is sleeved on the outer wall of thecross bar, and the cushion block is fixedly adhered on the top end of the computer. The invention provides the remote unlocking device of the telecommunication equipment function, since a cross section of the computer base is a concave-shaped structure, a rotating plate rotates in clockwise or reversely rotates in counterclockwise in the sliding chute through a sliding block in the process of rotating the rotating plate, and the computer can be rotated to an appropriate location.