34results about How to "Small length" patented technology

The invention discloses a vehicle-mounted camera lens, which comprises, in order from the object side to the image side, a first lens having a negative focal power, a convex object side surface and aconcave image side surface; a second lens having a negative focal power, a concave object side surface and a convex object side surface; a third lens having a positive focal power and double convex surfaces; a diaphragm; a fourth lens having a positive focal power and double convex surfaces; a fifth lens having a negative focal power and a concave object side surface, and forming a cemented lens with the fourth lens; a sixth lens having a positive focal power and a convex object side surface; and a filter. The second lens, the third lens, the fourth lens, and the fifth lenses are all glass spherical lenses, and the first lens and the sixth lens are glass aspherical lenses. The vehicle-mounted camera lens significantly increases the distortion of the lens in a small angle of view to meet the special algorithm requirements of the vehicle system; and the lens size and length of the lens are effectively controlled while improving the resolution of the entire lens.

The invention provides a double-layer splitter plate hot runner, which can solve the problems of valve needle blocking caused by thermal expansion of a splitter plate, high machining difficulty of a large-sized splitter plate and the like existing in the prior art. The technical scheme is that: the double-layer splitter plate hot runner comprises splitter plates, a main injection molded nozzle and a valve needle, wherein the splitter plates comprise an upper splitter plate and at least one lower splitter plate; and a smelt runner in the upper splitter plate is communicated with a smelt runner in the lower splitter plate. The invention aims to transfer the expansion of the splitter plates in the hot runner to the upper splitter plate to avoid the valve needle blocking phenomenon caused by large size and large thermal expansion of the single-layer splitter plate when a large-sized plastic product is formed by a hot runner injection mould.

The invention discloses a suspension bridge sectional-type catwalk and a construction method thereof, which relate to the field of the construction of suspension bridges. The suspension bridge sectional-type catwalk is used for connecting two main towers respectively disposed at two sides of a main span of a suspension bridge and anchorages disposed at two sides of the suspension bridge. Two sides of each main tower are respectively and fixedly provided with a first anchoring apparatus, wherein the two first anchoring apparatuses of the same main tower are connected with each other by virtue of a counter-pulling apparatus pre-embedded in the main tower, and a main span load bearing rope is arranged between the two opposite first anchoring apparatuses of the two main towers; and each anchorage is provided with a second anchoring apparatus, and a side span load bearing rope is arranged between each second anchoring apparatus and the first anchoring apparatus of the opposite main tower.

The invention discloses a continuous indigo dyeing device for cotton sliver. The device comprises a pre-treatment device, a dyeing device, a raw cotton feeding device and a post-treatment device, all of which are orderly arranged. The pre-treatment device comprises the raw cotton feeding device, a loosening roll, a carding roll, a collection and slivering device, a cotton sliver wetting device, a scouring groove, a scouring rotary drum and a pair of liquid pressing rolls A. The continuous indigo dyeing device for cotton sliver has the following beneficial effects: sliver equipment, sliver scouring, sliver dyeing and water scrubbing and drying processes are effectively integrated so that phenomena in the prior art are avoided during a sliver processing and production process such as non-uniformity and broken ends due to accidental stretching; and high efficiency short-flow production of denim indigo is achieved. The invention further discloses a method for dyeing with the dyeing device.

The invention relates to the field of conveying belts, in particularly to an iron square part turnover device for the conveying belts. The iron square part turnover device for the conveying belts comprises the conveying belts which are arranged in a parallel mode and supporting rolls which are arranged below working faces of the conveying belts. The iron square part turnover device for the conveying belts is characterized in that a cross intersection frame is arranged on the bearing rolls; the intersection frame is arranged between the two adjacent conveying belts; the supporting rolls penetrate a central position of the intersection frame; the section of the intersection frame is in a rectangular shape; a position close to a center of the intersection frame is provided with a magnet absorbing iron square parts; one side of the intersection frame, with which long edges of the iron square parts are in contact, is provided with the magnet; the length from a single side of the intersection frame to the central position is not less than half length of the iron square parts. According to the technical scheme, the iron square part turnover device for the conveying belts is simple in structure and enables the conveying belts to automatically turn over the iron square parts.

The invention discloses a production method of an indigo jean fabric. The production method comprises the following steps: step one, loosening raw cottons, removing impurities, and carrying out carding to remove short fibers; step two, boiling the cotton fibers obtained in the step one in a high temperature alkali-oxygen liquid; step three, preparing indigo dyed cotton strips; step four, integrating multiple dyed cotton strips obtained in the step three, and carrying out rough yarn and spun yarn production and processing to obtain indigo cotton yarns; and step five, taking the indigo cotton yarns obtained in the step four as the warps to carry out weaving. In the prior art, loose fibers can easily get stacked and agglomerated during the dyeing process, so the dyeing process becomes tedious, and the dyeing becomes uneven, the provided production method solves the abovementioned problems and is capable of producing indigo jean fabrics efficiently, and moreover, the production flow is short.

The invention provides roadway advanced supporting supports capable of assisting machinery to move. The roadway advanced supporting supports capable of assisting the machinery to move solve the problems that repeated supporting, complex operation and low working efficiency in the prior art for a floppy coal top roadway and a long-distance advanced supporting roadway. The roadway advanced supporting supports capable of assisting the machinery to move comprise advanced supporting supports which are composed of top beams, bases, and hydraulic upright columns which are connected between the top beams and the bases in a hinge joint mode and an auxiliary moving mechanism. The roadway advanced supporting supports capable of assisting the machinery to move are characterized in that the lower portions of the two hydraulic upright columns which are connected on one base in a hinge joint mode are fixed together through a fastening support, the lateral end of each top beam is connected with a top protective plate in a hinge joint mode through a telescope hydraulic cylinder, the two advanced supporting supports are a set in parallel in a transverse mode, a plurality of sets of advanced supporting supports are longitudinally continuously arranged along a roadway, and therefore supporting to a top plate is formed; and moving support mechanical arms are arranged between a set of two advanced supporting supports to be moved, are matched with a transport cart, and move each advanced supporting support along the roadway in a longitudinal sequence. The roadway advanced supporting supports capable of assisting the machinery to move are reasonable in structure and design, stable in supporting, convenient to operate, safe to use, and capable of reducing the effect of advanced supporting operation to working face coal mining production.

The invention discloses a low-damping pitching dynamic supporting device for a wind tunnel free oscillation test. A test model is divided into a test model front section and a test model rear section, the test model front section is fixed at one end of the test model rear section, the pitching dynamic adjustment mechanism is connected in the test model rear section, and the pitching dynamic adjustment mechanism is connected in the test model rear section. The automatic locking mechanism is connected to one end of the pitching dynamic adjusting mechanism, the end, away from the pitching dynamic adjusting mechanism, of the automatic locking mechanism is connected with the other end of the ventilation tail supporting rod assembly, and the angular displacement measuring assembly is embedded in the pitching dynamic adjusting mechanism. Compared with existing dynamic supporting devices such as a bracing wire, a strip, a mechanical bearing and a conventional air bearing, the pitching dynamic supporting device is compact in structure and small in size, can be arranged in a small installation space allowed near the mass center of a test model and does not interfere with a wind tunnel flow field, thereby satisfying basic requirements of a hypersonic wind tunnel test.

The invention discloses a small fully-automatic multistage rapid telescopic link device. The small fully-automatic multistage rapid telescopic link device comprises a telescopic link barrel, wherein the telescopic link barrel is connected with a controller, and the controller is connected with an air storage tank through an air pipeline to a direct-flow air pump; the telescopic link barrel comprises a fixed barrel, and a movable barrel penetrating through the inner cavity of the fixed barrel and capable of telescoping along the fixed barrel, and the inner cavity of the movable barrel is sleeved with a load platform capable of telescoping along the same; a traction roll driven by a direct-current motor is arranged on the fixed barrel, and a traction steel wire rope connected with the load platform is arranged on the traction roll; the controller is used for controlling the movable barrel in the telescopic link barrel to be rapidly ejected out along a horizontal direction under the driving of the air pressure of the direct-flow air pump, after the load platform detects, the traction roll driven by the direct-current motor is controlled by the controller to pull the steel wire rope to drive the movable barrel in the telescopic link barrel to retreat back to the limit position of the fixed barrel, so as to finish one-time non-contact rapid detection. The small fully-automatic multistage rapid telescopic link device disclosed by the invention is short in stretching and retreating time, small in size, light in weight, convenient to operate, and convenient to repair and maintain.

The invention provides a capacitance liquid level transmitter. The liquid level transmitter comprises a measuring rod, a compensation circuit board and an amplification circuit board. The measuring rod comprises a metal outer rod and a metal inner rod sleeved in the metal outer rod, the metal outer rod and the metal inner rod are 50mm to 450mm long, the section areas of the metal outer rod and the metal inner rod are between 10mm<2> and 700mm<2>, and a liquid accommodation cavity is formed between the metal outer rod and the metal inner rod. The linearity range of the compensation circuit board is +/-1% FS, the temperature compensation range is between 0 DEG C and 80 DEG C, and the amplification time of the amplification circuit board is higher than 1000. The capacitance liquid level transmitter is capable of measuring the small capacity and low liquid level.

An improved brake equalizer apparatus for equalizing fluid pressure and damping shock waves or pressure surges in fluid lines of a fluid pressure-actuated system, such as a hydraulic brake system. The apparatus has a shorter reaction time than a conventional brake equalizer, and can be manufactured with smaller overall length and weight. An important feature of the apparatus which results in reduced brake equalizer reaction time is an improved brake equalizer piston. The piston of the invention is shorter than a conventional brake equalizer piston (the ratio of the inventive piston's length to the length of the shock absorber which it abuts is substantially less than 0.5, and is preferably equal to about 0.23). The piston of the invention is also lighter than a conventional brake equalizer piston, and is preferably made of a hard, non-compressible, self-lubricating material. The brake equalizer of the invention does not employ any O-ring or other seal between the piston and the surrounding housing along which the piston slides, thus eliminating friction that would otherwise exist between such a seal and the housing as the piston slides along the housing.

The invention discloses an underwater robot propeller modular drive circuit and a driving method thereof. A current detection module detects working current of a propeller in real time; current detection results are transmitted to a master control CPU (central processing unit module) in analog voltage signal form; the master control CPU module receives the information about the current detection results and generates corresponding control voltage signals according to actual conditions; an A-PWM (analog pulse width modulation) module receives the control voltage signals from the master controlCPU module, converts them into PWM signals and transmits the PWM signals to a PWM power amplification module so as to control speed and output push of the propeller.

A withstand voltage testing device for underground cable laying comprises a cable roller used for winding a cable, a roller frame and a swing frame used for preventing uneven winding of the cable. Thecable roller is connected with a winding motor through a speed reducer, and the swing frame is connected with a driving motor through a crank sliding block mechanism. The crank sliding block mechanism is connected with a test ring, the test ring is connected with one test terminal of a pressurization test device, and the other test terminal of the pressurization test device is connected with a wire in the cable; an annular magnet is adsorbed at each of the two ends of the test ring, and iron sand is adsorbed on the annular magnets; and the cable penetrates through the test ring and the innerrings of the annular magnets and is in contact with the iron sand. The device is low in cost, small in occupied area, convenient to test, convenient to lay and construct and high in reliability, and an electric leakage point can be quickly found.

The invention discloses a rubber hose and a manufacturing method thereof. The rubber hose comprises a hose section and flange plates arranged at two ends of the hose section, wherein the hose wall ofthe hose section comprises an inner rubber layer, a strengthening layer and an outer rubber layer, which are arranged sequentially from inside out; and ends of the strengthening layer are wound aroundspacing rings and embedded and fixed in mortises of the flange plates. According to the rubber hose provided by the invention, the inner rubber layer contacts an in-pipeline medium and ends of the inner rubber layer turn back to enclose the flange plates to be used for sealing; the strengthening layer performs a function of pressure bearing; the outer rubber layer plays a protective role; the flange plates are used for connection; and the spacing rings and the flange plates jointly fix the strengthening layer, so as to prevent the relative displacement between the strengthening layer and rubber during a deformation process, which can affect the capacity of pressure bearing. The rubber hose referred to in the invention is applied to the flexible connection of important pipelines passing through a seismic isolation layer, so as to protect the important equipment pipelines from damage during a deformation occurring in an earthquake; the rubber hose has the characteristics of strong deformation capacity with a maximum being up to +/-700 mm, small reaction force and good durability; and besides, the fatigue resistance for repeated deformation is excellent and the service life is long.

The invention relates to a device (1a..1g) for processing thermoplastic material, comprising a storage container (2) / a conveying line (11) for pieces of plastic particles and a conveying screw (3) connected thereto. The device further comprises (1a.. 1g) an extruder (4) which connects to the conveying screw (3), and a temperature control device (7) arranged in the course of the conveying screw (3). In addition, a temperature sensor (8, 8a, 8b) is arranged in the course of the conveying screw (3) / the extruder (4), and/or means (10) are provided for detecting a load of a drive (6) of the extruder (4). Finally, the device (1a..1g) comprises means for influencing the temperature control device (7) and a control/regulation unit (9) which is connected to the at least one temperature sensor (8, 8a, 8b) and/or the influencing means of the temperature control device (7). Furthermore, an operating method for the device (1a.. 1g) is specified, in which the pieces of plastic particles are temperature-controlled by a temperature control device (7) in the course of the conveying screw (3).

The invention provides a device for harvesting artificially cultured kelp, and belongs to the technical field of kelp culture. The device includes a hull, brackets, conveyors, hydraulic rods, invertedhook heads, gears, conveyor belts, fixed clamping blocks, movable guide plates, springs, shearing plates, cutter heads and motors, wherein the brackets are fixedly connected to the left and right sides of the inner part of the hull, each conveyor is fixedly connected to the upper end of the hull through the corresponding bracket, the surface of one side of each conveyor is fixedly connected withthe corresponding hydraulic rod, the end of one side of the bottom of each hydraulic rod is fixedly connected with the corresponding inverted hook head, the inner part of one side of each conveyor isrotatably connected with the corresponding gear, the inner part of each conveyor is rotatably connected with the corresponding conveyor belt, the outer surface of each conveyor belt is fixedly connected with the corresponding fixed clamping blocks, the top surface of each conveyor is movably connected with the corresponding movable guide plate, each movable guide plate is located between the corresponding gear and the corresponding conveyor belt, the surface of one side of each movable guide plate is fixedly connected with the corresponding spring, and the end of one side of each movable guideplate is fixedly connected in the corresponding conveyor.

The invention provides a container loading method for vehicles. The method comprises the following steps: splitting one load vehicle into a vehicle frame and multiple parts such that the length and the width of the vehicle are respectively less than the length and the width of a standard counter; reversely disposing one vehicle frame and putting the vehicle frame below the other vehicle frame in order to form a vehicle frame group and placing multiple parts into gaps between vehicle frame groups; overlapping the two groups of vehicle frame groups, wherein the total overlapping height of the two groups of vehicle frame groups are less than the height of the standard counter; and loading the vehicle frame groups into the standard counter and transporting the vehicle frame groups. With the container loading method for vehicles, sea-railway combined transportation to inland cities in America is convenient. The cargo transport cost is lowered. The favorable economic benefit is created.

The invention relates to equipment for renewing the air of a plurality of rooms (1), comprising: a common single-flow airflow generator (2) arranged inside the rooms for extracting air from the rooms; a dual flow heat exchanger (3) arranged inside each room (1), comprising: an inlet opening (4) for the airflow (10) entering the room; an outlet opening (5) for the airflow (10) entering the room; an inlet opening (6) for the airflow (11) exiting the room; an outlet opening (7) for the airflow (11) exiting the room; a flow inlet inner duct (8) connecting the inlet (4) and outlet (5) openings for the airflow entering the room; a flow outlet inner duct (9) connecting the inlet (6) and outlet (7) openings for the airflow exiting the room; an exchange wall (12) having a first surface (13) defining a portion of said flow inlet inner duct (8) and a second surface (14) opposite the first defining a portion of the flow outlet inner duct (9); a plurality of individual ducts (15) for extracting air from the rooms, an individual extraction duct for a room connecting the flow generator to the outlet (7) of the heat exchanger (3) of the room for the airflow (11) exiting the room via a common air extraction collecting duct (20); an air inlet duct (16) in each room, individually allocated to each room, in which flows only the airflow (10) entering said room, and connecting the inlet opening (4) of the dual flow heat exchanger (3) of each room, for the airflow (10) entering the room (1), to the external environment (17).

The invention discloses a convenient drying rack. The drying rack comprises a supporting assembly, a drying assembly and a limiting assembly, the supporting assembly comprises supporting rods, casters, rotating rods, sliding rods and fixing rods, the sliding rods are fixed on the upper ends of the supporting rods, the casters are located at the bottom ends of the supporting rods and rotatably connected with the supporting rods, and the rotating rods are located on the upper sides of the supporting rods and clamped to the outer walls of the sliding rods; two layers of sleeve rods including a first sleeve rod and a second sleeve rod are arranged on the inner side of a drying hang rod and can be stretched to both sides and elongated according to the needs, the height between the supporting rods and the rotating rods can be adjusted through the sliding rods, and the height can be increased according to the needs to make up for height and length reduction after overall shortening of the device to facilitate the carrying by a user walking up and down stairs; the casters are arranged below the supporting rods so that the user can conveniently move clothes hangers for hanging out clothes or quilts, which improves the convenience of use.

The invention belongs to the technical field of electric power and electronic interconnection, and particularly relates to a large-current cable splicing structure capable of being used in a narrow space. The structure comprises a contact pin (1) and a mounting seat (2); the mounting seat (2) comprises a base (22) and a sleeve (21), and axial contact pins (1) are arranged on two end surfaces of the base (22); the outer wall surface of the base (22) is provided with a barrel sleeve (21), the barrel sleeve (21) is in a hollow barrel shape, and the length of the barrel sleeve (21) is larger than that of the base (22), the structure can quickly realize the installation of a large-current cable, and the installed cable is good in overall appearance smoothness, small in protrusion, small in occupied length and diameter space, better in flexibility, small in bending radius, and particularly suitable for a narrow space, and the diameter size is increased by about 20%.

The invention relates to a power device, in particular to a discharge counter online monitoring device easy to detach. The device comprises a lightning arrester online monitoring box. The lightning arrester online monitoring box comprises an insulation mounting housing capable of mounting the discharge counter, and an insertion fixture used together with the insulation mounting housing. Accordingto the discharge counter online monitoring device, a cover is relatively rotatable relative to a lower protection portion through a hinge device; the cover is connected to the lower protection part through a locking device; and the cover can be fixed by inserting the insertion fixture. During maintenance, the maintenance and the disassembly of the discharge counter can be conveniently carried outonly need to pull out the insertion fixture, and maintenance personnel can work conveniently. Compared with a traditional mode, the electric shock risk of maintenance and disassembly of the dischargecounter is greatly reduced, and the personal safety is protected.

The invention discloses a refrigerating device with an extensible structure and a manufacturing method thereof. The refrigerating device comprises a basic refrigerating unit (1) and a refrigerant collecting device (2) which is connected with the basic refrigerating unit. The manufacturing method of the refrigerating device comprises step 1, the basic refrigerating unit (1) is assembled, step 2, the basic refrigerating unit (1) and the refrigerant collecting device (2) are connected, and step 3, a supporting device (3) is optionally installed. According to the refrigerating device, the refrigerating effect and the refrigerating capacity of the refrigerating device can be adjusted by adjusting the number of connecting refrigerating unit, the size of the basic refrigerating unit and the sizeof the connecting refrigerating unit are small, so that the space-adaptive capacity of the refrigerating device is high, and the manufacturing method for the refrigerating device is simple to operateand easy to implement.