51results about How to "Avoid soldering" patented technology

The invention relates to a through-hole reflow soldering method. The method is characterized by printing solder at the plug-in hole positions where exposed pins can not meet the wave soldering requirement on a PCB (printed circuit board), inserting pins of a corresponding plug-in component into plug-in holes, the pins bringing part of solder paste in the plug-in hole walls and then carrying out reflow soldering. The method has the following advantages: temperature damage to the plug-in component is not easy to cause, the lack of space for manual repair soldering during manual repair solderingis avoided, cold soldering, poor soldering and other soldering defects are not easy to cause, the soldering quality is good, the reliability is high, and the soldering efficiency is high, and the method is suitable for soldering of the plug-in components with the exposed pins failing to meet the wave soldering requirement.

The invention provides a construction method of an anchor ear gusset plate and the ceiling joist. The main body of the upper half anchor ear plate is an inverted sulciform flat steel plate; the two lateral surfaces of the sulciform flat steel plate are symmetrically welded with two angular steel plates, which function as bolt connecting plates, wherein the bottoms of the angular steel plates are provided with bolt holes. The structure of the lower half anchor ear plate is symmetrical with the structure of the upper half anchor ear plate, wherein the bottom surface of the lower half anchor ear plate is connected with the gusset plate; the bottom surface of the gusset plate is connected with the horizontal gusset plate and the vertical gusset plate which intercross vertically; the horizontal gusset plate and the vertical gusset plate are respectively provided with a main keel connecting hole and a secondary keel connecting hole. The upper half anchor ear plate and the lower half anchor ear plate environ the steel truss steel truss; the upper half anchor ear plate, the lower half anchor ear plate and the steel truss are connected with each other fixedly via bolts, the main connecting hole is connected with the main keel via bolts and the secondary keel is connected with the secondary keel via bolts. The fabricated construction product and the construction method are capable of avoiding redundant welding modes, reducing the building energy consumption, speeding up the construction speed, and are widely applicable in the ceiling suspending work of buildings of various steel structures.

The invention relates to an advertising board which comprises an advertising board body. An advertising plate and the advertising board body are fixed by arranging multiple supports on the advertising board body, accordingly the mode that the advertising plate is needed to be welded in a traditional construction method is omitted, each support consists of multiple triangular grid frameworks, and the adjacent grid frameworks are connected through connecting bodies. Therefore, assembly and disassembly can be rapidly performed in a construction field, the construction efficiency is improved, and a construction period is shortened. In addition, the triangular grid frameworks are stable in structure during stress, weak links formed after welding are eliminated, and the safety of the advertising board is improved.

The invention provides a beam and column connecting structure, and belongs to the field of steel structures. The problem that an existing beam and column connection strength is low is solved. The beamand column connecting structure comprises a column body and a beam body. The column body comprises a stand column; the beam body comprises cross beams and longitudinal beams; the stand column comprises four column plates; two cross beams and two longitudinal beams are fixed to the stand column. The column body also comprises a central pipe; the central pipe comprises is connected into the columnbody; and the central pipe comprises four central plates. The column body also comprises two transverse pipes and four longitudinal pipes. the two transverse pipes are fixed to the outer side surfacesof the two central plates at the front and rear; the four longitudinal pipes are fixed to the outer side surfaces of the two central plates on the left and right; the two longitudinal pipes are positioned above the two transverse pipes; transverse holes are formed in the two column plates on the left and right, the two ends of the transverse pipe penetrate out of the transverse holes and are located in the two transverse beams, the two transverse pipes are fixed to the inner walls of the left and right sides of the transverse beams, longitudinal holes are formed in the two column plates on the front and back, the longitudinal pipes penetrate out of the longitudinal holes and are located in the longitudinal beams, and the four longitudinal pipes are fixed to four corners of the inner wallsof the longitudinal beams. The connecting structure is higher in strength and better in stability.

The invention belongs to the technical field of lithium ion battery manufacture, and particularly discloses a lithium ion battery anode tab and a manufacture method thereof. The lithium ion battery anode tab comprises an aluminum strip, a nickel plating layer is arranged at the tail end of the aluminum strip, and a tab-film for adhesion is arranged in the middle of the aluminum strip. The manufacture method of the lithium ion battery anode tab specifically includes the steps of (1) oil removal; (2) activation; (3) nickel plating; and (4) cleaning and drying. The nickel plating layer plated at the tail end of the lithium ion battery anode tab substitutes for existing soldering nickel strips, a high-temperature soldering process after battery charging is decreased, and the easily appeared problems of pseudo soldering, burn-in, short circuit and even explosion during soldering of a battery are avoided, and the quality of the battery is ensured. Additionally, by the manufacture method, consumption of nickel is greatly reduced, precious resources are saved, production efficiency is improved, and production cost is lowered. The lithium ion battery anode tab prepared by the manufacture method is smaller in resistance, higher in voltage and larger in capacity.

The invention discloses a bell jar type wind cap for an environment-friendly energy-saving circulating fluidized bed boiler, belongs to the technical field of boiler structures, and solves the problems that a conventional wind cap is liable to slag leakage, a wind cap head and a wind cap seat are severely abraded, and the cost is high and economy is poor due to the fact that the wind cap is uneasy to change after abrasion. The bell jar type wind cap comprises the wind cap head, a protective sleeve and the wind cap seat, wherein the wind cap seat comprises a cylinder and a support plate; the support plate is mounted at the upper part of the cylinder in a sleeving manner; the protective sleeve comprises a barrel body and a locating ring fixedly connected on the outer edge of an open end of the barrel body; a plurality of first through holes are uniformly formed in the side wall of the upper part of the barrel body; a plurality of second through holes are uniformly formed in the top of the barrel body; the wind cap head and the protective sleeve are mounted on the support plate in a buckle manner; the wind cap head is fixedly connected with the support plate; the protective sleeve is positioned between the wind cap head and the wind cap seat; the outer side wall and the top outer edge of the locating ring are in tight contact with the inner wall of the wind cap head; and the wind cap head, the protective sleeve and the cylinder are coaxially arranged. The bell jar type wind cap is used for an air distribute device of the circulating fluidized bed boiler.

The invention discloses a lower frame of an electric vehicle and a chassis using the frame, and relates to the technical field of new energy vehicles. The lower frame comprises a front-end frame, a battery box fixing frame, a rear-end frame and a battery box lower shell, wherein the front-end frame, the battery box fixing frame, the rear-end frame and the battery box lower shell are all thin-wallaluminum alloy pieces; the front-end frame is positioned in front of the battery box fixing frame; the front-end frame is in threaded connection with the front end and the front side edge of the battery box frame through four bolt sets; the rear-end frame is located behind the battery box fixing frame, the rear-end frame is in threaded connection with the rear end and the rear side edge of the battery box frame through four bolt sets, the battery box lower shell is located in the battery box fixing frame, and the battery box lower shell is connected with the battery box frame through a circleof screws at the bottom. The lower frame has the characteristics of no need of welding, simple process, high precision, light weight, high structural strength and modular assembly, and can adapt to small-batch or customized production of electric vehicles.

A lightening method of a battery protective cover for electric buses is provided. The battery protective cover includes a protective cover body, a maintenance door mounted on the protective cover body, and a connector for mounting and connecting the battery protective cover. The battery protective cover is characterized in that both the protective cover body and the maintenance door are made of a heat-insulating sandwich material, the heat-insulating sandwich material is composed of two fiber-reinforced plastic layers and a PVC (polyvinyl chloride) foam layer pasted between the two fiber-reinforced plastic layers, and the connector is embedded in the protective cover body. The lightening method of the invention has the advantages that the weight and manufacture cost of the battery protective cover for electric buses are effectively decreased, the lightening requirement of electric buses is met, and the overall appearance effect of the battery protective cover is improved. The invention also provides a battery protective cover.

The invention proposes a water stopping steel plate structure. The structure comprises a water stopping steel plate, a supporting seat, and a bayonet pin; flange plates are arranged on the edges of two opposite sides of the water stopping steel plate; a connecting hump is formed in the middle part of a first side surface of the water stopping steel plate; a connecting groove is formed in the middle part of a second side surface of the water stopping steel plate; a clamping groove is formed in a first end of the supporting seat; the connecting hump is connected with the clamping groove via a mortise and tenon structure; a second end of the supporting seat is connected with a bottom layer steel bar so the water stopping steel plate is connected with the bottom layer steel bar; a first end ofthe bayonet pin is arranged in the connecting groove in a clamped mode; and a second end of the bayonet pin is connected with a face layer steel bar of a bottom plate. The water stopping steel platestructure has the beneficial effects that through the arrangement of the water stopping steel plate, the supporting seat used for installing the water stopping steel plate, and the bayonet pin used for fixing the water stopping steel plate, the water stopping steel plate structure of a novel structure is formed by using the principles of mortises and tenons, spring limiting and the like and in combination of a suitable number of steel wires and waterproof materials, welding operation in the process of installing the water stopping steel plate can be effectively avoided, and the waterproof effect is greatly improved.

The invention discloses an intelligent IC card, an ultrathin battery and a pole piece with a tab of the ultrathin battery. The pole piece comprises a current collector piece, wherein the current collector piece is provided with connected dressing area and blank area; an integrally connected tab area extends on local edge of the blank area; and the tab area and the dressing area are located at two sides of the blank area. Due to the adoption of the tab which is integrally connected with the current collector piece, the welding mode of superposing a tab piece on the current collector piece is creatively avoided, the thickness of the pole piece is obviously reduced, the bottleneck that a polymer ultrathin soft package secondary battery cannot be easily improved towards a smaller thickness direction is broken through, and the pole piece has important practical value and significance in popularization and development of the intelligent IC card with the battery.

The invention relates to the technical field of heat radiation, in particular to a heat radiator and a manufacturing method thereof. The heat radiator is composed of cooling fins, a fixed medium cavity fixedly connected with the cooling fins, a heat transfer contact base body movably connected with the fixed medium cavity and a connecting piece arranged on the upper surface and the lower surface of the heat transfer contact base body. Then, the fixed medium cavity is included in the heat radiator, and media in the fixed medium cavity are defined as heat conduction oil. Then, a large amount of heat can be transmitted out of the heat transfer contact base body through the performance of the heat conduction oil. Then, heat exchange is achieved, the heat radiation effect is improved through rotation and large-area treatment of the cooling fins, and the heat radiation effect on equipment needing heat radiation treatment is guaranteed. In the manufacturing process, the cooling fins and the fixed medium cavity are formed in an ultrasonic welding manner or a manner of being squeezed into a whole; then the character that heat radiation of welding blocks is uneven due to a tradition welding manner is reduced; and then the heat radiation performance of the heat radiator is improved.

The invention provides a solar cell piece and a preparation method thereof. The preparation method comprises: a first back electrode is prepared on the back of a silicon wafer; an aluminum back field is prepared at the back, beyond the first back electrode, of the silicon wafer, wherein the n aluminum back field is in conduction with the first back electrode; a second back electrode is prepared on the first back electrode and the first back electrode and the second back electrode are combined to form a back electrode, so that the thickness of the back electrode is not less than that of the aluminum back field; and a front electrode is prepared on the front side of the silicon wafer. According to the solar cell piece prepared based on the preparation method, because the thickness of the back electrode is not less than that of the aluminum back field, the back electrode and a solder strip are in full contact during cell piece series welding, so that a problem that the back electrode can not be welded with the solder strip or insufficient soldering exists is solved; and a technical bottleneck of volume production of the solar photovoltaic assembly is solved and the industrialization target of the products is realized.

The invention discloses an elastic load mechanism placed at a test stand. The elastic load mechanism comprises a spindle, a first bracket, a second bracket, a nut, a spring, a first spring sleeve and a second spring sleeve. The first bracket and the second bracket are symmetrically provided with through holes. The first spring sleeve and the second spring sleeve include first ends and second ends; the outer diameters of the first ends are larger than the diameters of the through holes and the outer diameters of the second ends are smaller than the diameters of the through holes; and the second ends are sleeved into the through holes. The first ends of the first spring sleeve and the second spring sleeve are opposed to each other between the first and second brackets. A shaft shoulder is arranged at one end of the spindle and the nut is arranged at the other end; the first spring sleeve, the spring, and the second spring sleeve sleeve between the shaft shoulder and the nut successively. The spindle drives the spring sleeves to move relative to the brackets. The elastic load mechanism having a simple structure can be installed conveniently. During movement, the pulling force and pressure on the spring by the spindle are transformed into the pressures applied on the spring, so that the test stand structure becomes reliable and stable.

The invention discloses a welding fixture which comprises a fixture body and fastening components, wherein the fixture body is cross-shaped, and the fastening components are four in number and are fixed at four top ends of the fixture body respectively. According to the welding fixture provided by the invention, workpieces can be fixed at the top ends of the fixture body through the fastening components, and a plurality of workpieces can be welded in one attempt, so that the welding efficiency of the workpieces is improved; moreover, the two sides of a welding part are empty, so that other objects are prevented from being welded when the workpieces are welded, and the rework rate of welding of the workpieces is lowered.

The invention belongs to the field of machines, and particularly relates to a movement track. The movement track comprises a conveying belt, a first mounting plate and a second mounting plate. A synchronous belt is supported by a first supporting part and a second supporting part to form a ring, wherein the upper surface of the ring is in a disconnected state. The two ends of the disconnected position are fixed to the first mounting plate and the second mounting plate separately, and the first mounting plate and the second mounting plate are connected through a connecting piece. The distance between the first mounting plate and the second mounting plate can be adjusted through the connecting piece. The movement track has the advantages that as being disconnected, the ring-shaped conveyingbelt can be installed on the supporting parts conveniently; and as the disconnected position of the conveying belt is installed on the first mounting plate and the second mounting plate, the distancebetween the first mounting plate and the second mounting plate can be adjusted through the connecting piece, so that the degree of tightness of the conveying belt is adjusted without replacing the conveying belt.

The invention discloses a fuel tank structure of a motorcycle. The fuel tank structure of the motorcycle comprises an upper fuel tank shell and a lower fuel tank shell. A fuel filler is formed in one end of the upper fuel tank shell. The lower portion of the fuel filler is communicated with the lower fuel tank shell. A fuel deflector used for preventing fuel from overflowing is arranged between the fuel filler and the lower fuel tank shell. A fuel outlet nozzle is arranged on the lower portion of the lower fuel tank shell. The fuel outlet nozzle and the lower fuel tank shell are fixed in a welded mode. An overflowing pipeline clamp is further arranged on the upper fuel tank shell and is used for fixing an overflowing pipe. The overflowing pipeline clamp is located on one side of the fuel filler. The contact surface where the upper fuel tank shell and the lower fuel tank shell are connected is of a plane structure. The upper fuel tank shell and the lower fuel tank shell are fixed in an electric resistance welding mode. Four installation holes where a motorcycle frame is installed are formed in the four corners of the upper fuel tank shell respectively and comprise two round holes and two strip-shaped holes. The two round holes are arranged in a diagonal mode. The fuel tank structure of the motorcycle has the advantages of being simple in mold joint, more suitable for welding fixation, capable of relieving aging of a seal ring, easy to install, firm in installation, capable of saving materials and the like.

The invention provides an intelligent temperature-control protective box for outdoor electricity transmission monitoring equipment. The box includes a box body, a storage chamber and a temperature control chamber; the box body is internally provided with the storage chamber and the temperature control chamber, the temperature control chamber is arranged below the storage chamber, the top of the interior of the storage chamber is provided with a temperature detector and a humidity detector, the temperature detector is arranged at the right side of the humidity detector, the temperature controlchamber is internally provided with a fan and a drying tank, the drying tank is arranged at the left side of the fan, and an inlet of the drying tank is communicated with an outlet of the fan througha conduit; the temperature control chamber is further internally provided with a heating tank, and a heating pipe is installed in the heating tank. The intelligent temperature-control protective box for the outdoor electricity transmission monitoring equipment changes the traditional structural layout and prevents temperature control equipment from being placed with a main machine and the like; byseparately arranging the storage chamber and the temperature control chamber, the influences of the equipment to the environment of the storage chamber is avoided during adjustment of the temperaturecontrol equipment, and therefore the temperature control of the storage chamber can satisfy the required standard.

The invention discloses an inward recess preventing capillary tube capable of being fast installed. The inward recess preventing capillary tube comprises a body, and an inner thread is arranged on a port portion of the body; and optimally, an outer expanding port is arranged on the port portion of the body, and the inner thread is located on the inner surface of the outer expanding port. The inward recess preventing capillary tube capable of being fast installed has the advantages that on the premise that fast connection of the capillary tub is guaranteed, ports of the inward recess preventing capillary tube can be prevented from being inwards recessed.