34results about How to "Reduce maintenance and replacement" patented technology

The invention relates to a multidirectional discharging method of a mobile discharging car, and belongs to the technical field of a bulk material discharging device. The multidirectional discharging method is characterized in that materials are transferred into a belt conveyor at the lower part through a funnel and then are transported to the position above a discharging point for discharge; and by adjusting the horizontal distance between the discharging point of the belt conveyor and the outlet of the funnel, discharging position is adjusted without increasing overall height of the conveyor. The multidirectional discharging method has the beneficial effects that the materials can be flexibly discharged in multiple directions as required; the structure is compact, thus saving equipment installation space; a long chute is not used, thus avoiding phenomena such as material aggregation and blockage; by effectively controlling equipment height, discharging height difference is decreased, and dust generated during the material transfer process is reduced, and good dedusting and environmental protection effect can be obtained by utilizing dedusting equipment; and steel structural members in the equipment are simplified and diminished, thus the equipment can be conveniently installed and simply debugged, operated and maintained, and good economic benefit can be obtained. The mobile discharging car is particularly applicable to workplaces with narrow plant space and higher requirement on environmental quality.

The invention relates to an improved method for preparing epoxy fatty acid methyl ester, which is characterized in that a solid catalyst or a sodium bisulfate solid catalyst obtained by mixing 30-90 parts of sodium bisulfate, 10-50 parts of ferric sulfate and 0-20 parts of calcium sulfate is adopted in an epoxidation reaction. By using the solid catalyst, when catalytic activity of the solid catalyst corresponds to that of sulfuric acid, the reaction condition is temperate; the production safety is good; the obtained product has high epoxy value which can reach more than 3.5; the epoxidation temperature is reduced to a certain degree, for example, the reaction temperature can be reduced by about 10 DEG C; and because too high temperature is needless, the fatty acid eater is not easy to be carbonized; the obtained product has light and bright color and luster and can be directly used for a light-color product without a decolorization process; the yield is also enhanced; and particularly the corrosivity to equipment is greatly reduced, thereby reducing equipment investment, maintainance and replacement. Meanwhile, the solid catalyst is simpler than a liquid catalyst in use and recovery aspects and is friendly to environment.

The invention discloses an operating mechanism for a circuit breaker. The operating mechanism for the circuit breaker comprises a switching-on module unit and a switching-off module unit. The switching-on module unit is composed of a left side board, a right side board, an energy storage motor, an energy storage compression spring, a crank arm, an energy storage shaft, a cam, a chain wheel, a tripping shaft, a trigger, a microswitch, a switching-on electromagnet and an energy storage sign board. The switching-off module unit is composed of a left side board, a right side board, one or more tripping electromagnets, a switching-off half shaft, a pinch plate, a trigger and a switching on / off sign board. The operating mechanism for the circuit breaker has the advantages that the operating mechanism is practical and low in production cost, and the spring operating mechanism of the circuit breaker is combined into a modularized unit, is independent from the circuit breaker, and is integrally assembled and disassembled conveniently; a switching on module and a switching off module in the modularized operating mechanism can be independently assembled in advance and are each of one specification, and therefore the variety and the number of spare parts and stored parts are both greatly reduced, and the production efficiency of products is improved.

The invention discloses an efficient boiled off gas (BOG) after-condenser. The efficient BOG after-condenser comprises a first shell, a second shell, a liquefied natural gas (LNG) inlet formed in the first shell, a pipe plate and a supporting grid, wherein the pipe plate and the supporting grid are located at the two ends of the first shell respectively; the pipe plate is connected with a BOG inlet; a plurality of micro pore pipes, fixed-interval rods and spiral flow guide plates are arranged between the pipe plate and the supporting grid; the spiral flow guide plates are provided with pipe pores; the pipe plate is provided with pipe plate pipe pores; the surfaces of the micro pore pipes are provided with micro pores; the micro pore pipes and the fixed-interval rods penetrate through the pipe holes in the spiral flow guide plates and are fixed between the pipe plate and the supporting grid in parallel; one end of the second shell is connected with the first shell through a connecting flange, and the other end of the second shell is connected with an LNG outlet; a static mixing unit is arranged inside the second shell. Compared with traditional BOG after-condensation equipment, the efficient BOG after-condenser is high in condensation efficiency, high in processing capacity, easy to operate and convenient to maintain and replace.

A seat stem adjustment device includes a seat stem received in an outer tube, a control unit connected to a bicycle frame, and a leverage unit located between the outer tube and the control unit. The control unit has a cable which is connected to and driven by a lever. The leverage unit has a top member connected to the outer tube. A first link and a second link are pivotably connected to the top member. The first link contacts the valve rod. The second link has a mediate portion pivotably connected to the top member. The second link is connected to the cable. A resilient member is connected between the top member and the second link. The second link pushes the first link to open or close the hydraulic liquid path when the cable is operated so as to adjust the height of the seat.

The invention discloses an overground hydrant which leaks less water after colliding, is more convenient to repair and has lower repairing cost. The overground hydrant comprises a hydrant body, an anti-collision section, a valve body, a water pressure gauge, a floating ball valve and a tappet, wherein an exhausting valve is arranged at the top of the hydrant body; the anti-collision section is arranged between the hydrant body and the valve body; an annular broken groove is formed in an outer side wall of the anti-collision section; a water leakage valve is arranged at a side part of the top of the valve body; the water leakage valve is communicated with an inner cavity of the anti-collision section through a water leakage channel; the water leakage channel comprises an upper-section water leakage channel located in a bottom flange disc of the anti-collision section and a lower-section water leakage channel located in a top flange disc of the valve body; the water pressure gauge is arranged on a side wall of the hydrant body; the water pressure gauge is communicated with the inner cavity of the valve body through a water pressure channel; the water pressure channel comprises an upper-section water pressure channel located in the side wall of the hydrant body and a lower-section water pressure channel located in the side wall of the anti-collision section; the floating ball valve is arranged in the valve body; and the bottom of the tappet stretches to the upper side of the floating ball valve.

The invention discloses an advertisement display screen for marketing, which comprises a display screen, a tool cabinet and a cabinet door. A camera is arranged at the top left end of the display screen, and a solar battery panel is arranged at the top middle of the display screen. A transparent plate is provided in the middle part of the front end, and a tool cabinet is provided on the right side of the front end of the display screen, a touch screen is provided on the outer surface of the cabinet door, and a control panel is provided at the lower end of the touch screen, and the front end of the inner cavity of the display screen is provided with a The first rotating shaft and the fourth rotating shaft, the rear end of the inner cavity of the display screen is provided with the second rotating shaft and the third rotating shaft, the left end of the inner cavity bottom of the display screen is provided with a controller and a timer, and the inner cavity of the display screen There is a memory in the middle of the bottom of the cavity, and a transformer and a voltage stabilizer are installed at the right end of the bottom of the display screen. The invention has novel structure, small space occupation, cost reduction, energy saving and multiple functions.

The invention discloses a preparation technique of a manganese-copper alloy glass mold. The preparation technique comprises the following steps of: smelting cathode copper with high purity as raw material copper, and according to the proportion of a metal mixture, smelting the needed metal mixture in a medium-frequency furnace, casting the metal mixture to be the shape of a cast, and conducting stress relief annealing on the formed cast. The manganese-copper alloy glass mold can meet the corresponding high requirement on the machining precision of the manganese-copper alloy and the usage property of the materials, fills up the blank of China, and enhances the core competence of the product. In addition, the manganese-copper alloy glass mold breaks through the convention that the copper alloy is imported from abroad, so that the cost is greatly lowered, the production period is only 60% of the original production period, the competence power of the material on the international market can be greatly improved, and thus a good basis is established for further developing the international market.

The invention relates to a battery pack and an electric vehicle. The battery pack comprises a cell module, a function module and a connecting member. The cell module comprises a first housing and a cell unit, the cell unit is encapsulated in the first housing, a first conductive terminal is led out from the cell unit and can be touched from the outside of the first housing. The function module consists of a second housing and a function unit, the function unit is encapsulated in the second housing and is provided with a second conductive terminal, also the second conductive terminal can be touched from the outside of the second housing, the first housing and the second housing are in detachable connection through the connecting member, when the first housing and the second housing are in connection, the first conductive terminal and the second conductive terminal can be connected, and when the first housing and the second housing are separated, the first conductive terminal and the second conductive terminal can be separated. The technical proposal realizes partial disassembly and assembly of the cell module, and disassembly and assembly become more convenient. The invention also relates to an electric vehicle equipped with the battery pack.

The invention provides a quick screwing-on and screwing-off drill rod with a connector convenient to disassemble and assemble. The quick screwing-on and screwing-off drill rod comprises a rod body, amale connector and a female connector, wherein the male connector is composed of a male connector body, a male connector threaded section and a male connector connecting section; the male connector connecting section penetrates through an inner hole of the male connector threaded section to be in threaded connection with the male connector body; the male connector connecting section is provided with a male connector threaded section limiting table; the male connector threaded section is in clearance fit with a hole shaft of the male connector connecting section; the female connector is composed of a female connector body, a female connector threaded section and a female connector connecting section; the female connector connecting section is in threaded connection with a hole shaft of thefemale connector body; the female connector connecting section is provided with a female connector threaded section axial limiting table; the female connector threaded section is located between the female connector threaded section axial limiting table and the female connector body; the female connector connecting section limits the female connector threaded section in the circumferential direction; and the male connector threaded section is in threaded connection with a hole shaft of the female connector threaded section. Quick replacement of quick-wear parts such as the drill rod connectorcan be achieved on a construction site, quick screwing-on and screwing-off are achieved, and the quick screwing-on and screwing-off drill rod is suitable for drilling at a higher rotating speed.

The invention discloses a dust removal system. The dust removal system comprises a cyclone dust remover and a bag type dust remover, wherein the bag type dust remover comprises a plurality of dust removing barrel bodies and the dust removing barrel bodies are distributed around the periphery of the cyclone dust remover. The system disclosed by the invention has the advantages of compact structure,convenience for conveying and transporting ash, small occupied area, capability of effectively preventing dust particles from being deposited to block pipelines, capability of effectively balancing pressure oscillation of a blast-furnace gas pipe network and capability of effectively reducing pipeline brushing, long service life, small operation noises, flexibility in hoisting and overhauling andsafety and reliability.

The invention discloses a split type adjustable pot support and a gas stove. The split type adjustable pot support comprises a frame body and pot lugs. The pot plugs are evenly arranged in the circumferential direction of the frame body. Each pot lug comprises a fixed plate and a sliding plate. Each sliding plate is arranged on the corresponding fixed plate and is used for adjusting the size of the pot support. In this way, the split type adjustable pot support can be applicable to pots of different shapes and sizes; the flame area can be controlled by adjusting the height of the pot support,and the thermal efficiency is improved; and the probability that a pot falls off because of inclination is reduced, and therefore, cooking is safer. The pot support is of a splicing structure, parts can be replaced or repaired after being damaged, and furthermore, the extra cost caused by using a support for small pots is omitted.

The invention discloses a climber vertical-greening system for a medium- / high-rise building. The system comprises triangular supporting structures, maintenance handrails, planting boxes, blocking plates, climbers, cultivation substrates, a drip irrigation device and hauling wire ropes, wherein the triangular supporting structures are used for fixing the system on an external facade of the building, the maintenance handrails are applied to later-stage maintenance, the blocking plates are used for preventing the planting boxes from moving outwards and inwards, the cultivation substrates are used for supporting the growth of the climbers, and the hauling wire ropes are used for hauling the climbers; and the hauling wire ropes are fixed to outer sides of the planting boxes through punched holes of the blocking plates, the planting boxes are clamped between inner and outer blocking plates, and a maintenance passage is formed between a face formed by the climbers and the external facade of the building. Through the climber vertical-greening system for the medium- / high-rise building, the greening of the external facade of the medium- / high-rise building can be achieved rapidly; due to the maintenance passage between the planting boxes and the external facade of the building, the problem that the traditional climbers are difficult in replacement, difficult in pruning, difficult in impurity cleaning and difficult in disease and insect pest control is solved; and the system is easy in construction, all fittings are standardized, water and fertilizer integrated management is achieved, and the vertical greening of the external facade of the medium- / high-rise building can be achieved efficiently and safely.

The invention discloses an electric wear-resisting ore pulp gate valve which is composed of a valve body, a gate plate, a support, a valve rod, a pressing plate and a sealing ring. An electric head is mounted on the support. The valve body is formed by buckling two symmetrical semi-valve bodies, and each semi-valve body is in a round-to-square funnel shape; the joints of the two ends of the valve body and pipelines are circular, an inner cavity located in a gate plate opening and closing position of the middle of the valve body is square, and therefore the inner cavity is changed into a square shape from a circular shape, the open area is enlarged, the flowing speed is reduced, and the purpose of reducing friction is achieved. The inner cavity of the valve body is covered with a fluorine lining, and a wear-resisting composite layer is arranged on the incident flow face of the gate plate. The wear-resisting composite layer can be made of special metal or rubber or cast stone. The fluorine lining is made of polyvinyl fluoride. Accordingly, the wear resistance of the gate valve is improved, and the service life of the gate valve is prolonged. The gate valve is electrically opened and closed, the labor intensity of workers is relieved, remote control is facilitated, and modern management is achieved. The wear resistance is high; due to the fact that the fluorine lining and the wear-resisting composite layer are additionally arranged, the easily-abraded portions of the whole gate valve are effectively protected, the wear resistance of the gate valve can be remarkably enhanced, the service life is prolonged, the maintenance and replacement frequency is reduced, and production efficiency is improved.

The invention discloses an assembled medical trolley with three occluded sides at the bottom and an inserted side at the same time, which comprises a top plate, a left side plate, a right side plate,a front face frame, a back plate and a bottom plate, wherein the left side plate and the right side plate are inserted between the front face frame and the back plate in an inserted occlusion structure. Any three of the front face frame, the left side plate, the right side plate and the back plate are occlusion pieces, and the other is the insertion piece; the lower end of the occlusion piece is fixedly connected with the bottom plate through a lateral occlusion structure, the lower end of the insertion piece and the bottom plate are limited in the vertical direction through a card inserting structure, and the top plate is installed at the top ends of the left side plate, the right side plate, the front face frame and the back plate. Various parts are connected and assembled without usinga large number of connecting parts, the assembly efficiency is high, the connection is stable and firm, and the disassembly and assembly are simple and convenient.

The invention relates to a novel water pipe joint nanometer waterproof film production process, which comprises: (1) preparing a base film: carrying out stirring mixing on nanometer silica, nanometer titanium dioxide and nanometer zinc oxide, adding to a bottom solvent formed by mixing a silicone acrylic emulsion and butyl acrylate, and carrying out mold pressing and sintering turning to obtain a base film; (2) preparing an antistatic coating material: carrying out stirring mixing on octadecyl amine and imidazolinium salt ethylacrylamide salt, and adding graphite to obtain an antistatic coating material; and (3) preparing a nanometer waterproof film: spraying the antistatic coating material onto both surfaces of the base film to obtain the nanometer waterproof film. According to the present invention, the process is simple, the novel formula and the novel dosage form are used, the long-term use of the water pipe joint is effectively ensured, effects of water resistance and seepage resistance are provided, and the cost is reduced.

The invention discloses an overground hydrant which leaks less water after colliding, is more convenient to repair and has lower repairing cost. The overground hydrant comprises a hydrant body, an anti-collision section, a valve body, a water pressure gauge, a floating ball valve and a tappet, wherein an exhausting valve is arranged at the top of the hydrant body; the anti-collision section is arranged between the hydrant body and the valve body; an annular broken groove is formed in an outer side wall of the anti-collision section; a water leakage valve is arranged at a side part of the top of the valve body; the water leakage valve is communicated with an inner cavity of the anti-collision section through a water leakage channel; the water leakage channel comprises an upper-section water leakage channel located in a bottom flange disc of the anti-collision section and a lower-section water leakage channel located in a top flange disc of the valve body; the water pressure gauge is arranged on a side wall of the hydrant body; the water pressure gauge is communicated with the inner cavity of the valve body through a water pressure channel; the water pressure channel comprises an upper-section water pressure channel located in the side wall of the hydrant body and a lower-section water pressure channel located in the side wall of the anti-collision section; the floating ball valve is arranged in the valve body; and the bottom of the tappet stretches to the upper side of the floating ball valve.

The invention relates to mining excavation equipment, in particular to a boring machine with a reciprocating direct-impact effect. The boring machine comprises a machine body comprising a travel mechanism and further comprises an impact mechanism and a rotary-drilling mechanism, wherein the impact mechanism comprises an impact device and an impact head, the impact head is arranged at the front part of the impact device, the impact device drives the impact head to impact, the rotary-drilling mechanism comprises a rotary-drilling device and a drilling bit, the drilling bit is arranged at the front part of the rotary-drilling device, the rotary-drilling device drives the drilling bit to perform rotary drilling operation, and the impact head of the impact mechanism is arranged at the middle part and / or the lateral part of the drilling bit of the rotary-drilling mechanism. The impact mechanism and the rotary-drilling mechanism are arranged on the machine body, and the travel mechanism drives the whole boring machine to move. The tunneling efficiency is increased, the drilling efficiency is greatly increased, the boring kinetic energy is utilized to the greatest extent, the damping to the rotation of the drilling bit is eliminated during reciprocating impact of the drilling bit of the boring machine, the toothed bit can penetrate and destroy materials more easily, and the impact life of the impact head is increased.

The invention discloses an electric gate valve composed of a valve body, a gate plate, a support, a valve rod, a pressing plate and a sealing ring. An electric head is installed on the support; the valve body is formed by buckling two symmetric half valve bodies in a round-to-square funnel shape, that is, the connecting positions of the two ends of the valve body and a pipeline are round, an inner cavity in the gate plate opening and closing position in the middle of the valve body is square, in this way, the inner cavity is changed from round to square, the overflowing area is expanded, the overflowing speed is reduced, and therefore the purpose of relieving abrasion is achieved. The inner cavity of the valve body is covered with tefulong, an abrasion-resisting composite layer is arranged on the flow surface of the gate plate, and the abrasion-resisting composite layer can be made of special metal or rubber or cast stone. The tefulong material is polyvinyl fluoride, so that abrasion resistance of the gate valve is enhanced, and the service life of the gate valve is prolonged. The gate valve is electrically switched on or off, so that labor intensity of workers is reduced, remote control is convenient, and modern management is realized. The gate valve is high in abrasion resistance; due to the fact that the tefulong and the abrasion-resisting composite layer are additionally arranged, the easy-to-abrade part of the whole gate valve is effectively protected, the abrasion resistance of the gate valve can be remarkably enhanced, the service life of the gate valve can be prolonged, maintenance and replacement can be reduced, and production efficiency can be improved.

The invention relates to a novel water pipe joint nanometer waterproof film, which comprises, by mass, 20-35 parts of nanometer silica, 15-30 parts of nanometer titanium dioxide, 5-15 parts of nanometer zinc oxide, 10-25 parts of a silicone acrylic emulsion, 5-10 parts of butyl acrylate, 2-6 parts of a film aid, 1-4 parts of an organosilicon defoamer, 4-8 parts of octadecyl amine, 1-2 parts of imidazolinium salt ethylacrylamide salt, and 3-7 parts of graphite. According to the present invention, the nanometer waterproof technology is used, the new formula and the new dosage form are used, the use is convenient, the long-term use of the water pipe joint is effectively ensured, effects of water resistance and seepage resistance are provided, and the cost is reduced.

The invention discloses an electric heater protection device, an air conditioning unit and an electric heater protection method thereof. The device comprises a fuse and a temperature limiter which arearranged on a main circuit of an electric heater; a control switch is used for controlling the power-on or power-off of the main circuit of the electric heater according to the control signal outputted by a main board; the main board is respectively connected with the control switch and an optocoupler for outputting the control signal to the control switch; when the electric heater does not worknormally, if a low level signal outputted by the optocoupler due to conduction is detected, a first prompt message for controlling the switch failure is issued. The device can solve the problems thatit is not achieved that the temperature limiter and a fuse body can effectively disconnect the main circuit of the electric heater and can detect the on and off of the electric heater, and the protection reliability is low, thereby improving the protection reliability.

The invention discloses a cut stem screening device. The screening device comprises a feeding pipeline, a screening bin, a screening plate and a blanking bin. The feeding pipeline is arranged on one side of the screening bin, the blanking bin is arranged at the lower end of the screening bin, a screening plate is obliquely arranged in the screening bin, one side of the screening plate is movably connected to the screening bin through a rotating shaft, a fixed plate is arranged on the other side of the screening plate, the fixed plate is connected to an arc-shaped plate through a fixed bolt, the arc-shaped plate is fixedly connected to the screening bin through a fixed lug plate, the screening plate comprises a clamping plate on the outer side and a screen located in the middle of the clamping plate, the screening density of the screening device can be adjusted, cut stems with different densities can be screened, and the screening device is easy and convenient to maintain and disassemble.

The invention relates to an improved method for preparing epoxy fatty acid methyl ester, which is characterized in that a solid catalyst or a sodium bisulfate solid catalyst obtained by mixing 30-90 parts of sodium bisulfate, 10-50 parts of ferric sulfate and 0-20 parts of calcium sulfate is adopted in an epoxidation reaction. By using the solid catalyst, when catalytic activity of the solid catalyst corresponds to that of sulfuric acid, the reaction condition is temperate; the production safety is good; the obtained product has high epoxy value which can reach more than 3.5; the epoxidation temperature is reduced to a certain degree, for example, the reaction temperature can be reduced by about 10 DEG C; and because too high temperature is needless, the fatty acid eater is not easy to becarbonized; the obtained product has light and bright color and luster and can be directly used for a light-color product without a decolorization process; the yield is also enhanced; and particularly the corrosivity to equipment is greatly reduced, thereby reducing equipment investment, maintainance and replacement. Meanwhile, the solid catalyst is simpler than a liquid catalyst in use and recovery aspects and is friendly to environment.

The invention discloses an amorphous electric reactor coil. The amorphous electric reactor coil comprises a coil body, wherein an iron core matching space is formed in the coil body; a first contact and a second contact are arranged on the coil body; the first contact and the second contact are both led out of the upper side of the coil body; the first contact comprises a vertical part and a bent part; the bent part is led out of the coil body; the vertical part is arranged on the bent part; and the distance between the vertical part and a central line of the iron core matching space is equal to that between the second contact and the iron core matching space. According to the amorphous electric reactor coil, the overall space occupation is reduced; the distance between the vertical part of the first contact and the second contact is symmetrically arranged, so that the installation is convenient; symmetric copper bar holes can be formed in a housing, so that the housing design is convenient; and copper bars of the same type can be used on the first contact and the second contact, and it is not required that different copper bars are designed for the two contacts, so that the cost is reduced and later repair and replacement are facilitated.

The invention discloses an amorphous reactor, which comprises a casing, an amorphous iron core is arranged in the casing, the amorphous iron core is fastened by a hoop, a coil is arranged on the amorphous iron core, and a first contact is arranged on the coil and the second contact, the first contact and the second contact are drawn from the upper side of the coil; the first contact includes a vertical part and a bent part, the bent part is drawn out from the coil, and the vertical part is arranged at the bent part On the folding part, the distance from the vertical part to the center line of the amorphous core is equal to the distance from the second contact to the center line of the amorphous core; both the vertical part of the first contact and the second contact are provided with copper row, the copper row protrudes from the corresponding position on the shell; in the amorphous reactor of the present invention, both the first contact and the second contact are drawn from the upper side of the coil, which reduces the overall space ratio, and its symmetrical arrangement It is convenient for installation and shell design; the same type of copper bar can be used on the first contact and the second contact, which reduces the cost and facilitates maintenance and replacement in the future.

The invention relates to the technical field of electrical cabinets, in particular to an electrical cabinet with a high-strength anti-theft observation window. On the inner wall of the body and at the upper and lower sides of the window, there are first mounting plates parallel to each other, and a second anti-theft bar is vertically and equidistantly connected between the two first mounting plates. On the inner wall and on the other two sides of the window, there are second mounting plates parallel to each other. The present invention uses the first anti-theft rods and the second anti-theft rods arranged in a staggered manner to prevent theft, which is stronger than the anti-theft net, and The anti-theft rods can be added or reduced as needed, which is convenient for replacement and maintenance, reduces the obstruction of the line of sight, and makes it easier to observe the internal conditions of the electrical cabinet. In addition, a block is set for the fixed mounting plate to strengthen the structure to ensure the reliability of the installation.

The invention relates to an unloading trolley with a material separation device, and belongs to the technical field of bulk material unloading devices. The unloading trolley is characterized in that: a belt conveyor is arranged below a funnel outlet along the front and back directions; and the horizontal distance between an unloading point of the belt conveyor and the funnel outlet can be adjusted, so that the integral height of equipment is not required to be increased. The unloading trolley has a flexible unloading mode and can be used for unloading in multiple directions according to requirements; the unloading trolley has a compact structure, so that the mounting space of the equipment is saved; a long chute is not used for transferring materials, so that the phenomena of material collection and material blocking are difficult to generate; the height of the equipment is effectively controlled, so that unloading height level differences are reduced, dust emission in the process of transferring the materials is reduced, and a good dust removal environment-friendly effect can be achieved by matching dust removal equipment; and a steel structural piece in the equipment is simplified and reduced, so that the unloading trolley is convenient to mount, is easy to debug, operate and maintain and has a good economic benefit. The unloading trolley is particularly suitable for working places with small plant space and higher environmental quality requirements.

The embodiment of the invention provides a rectifying and voltage-multiplying assembly and an X-ray high-voltage generator. The rectifying and voltage-multiplying assembly comprises an alternating-current input end and a direct-current output end, the plurality of rectification modules are packaged independently, and each rectification module comprises a transformation circuit, a rectification circuit and a protection circuit; wherein the primary side of the transformation circuit is connected with the AC input end, the rectification circuit is composed of a full-bridge rectification circuit or a half-bridge rectification circuit, the AC end of the rectification circuit is connected with the secondary side of the transformation circuit, and the DC end of the rectification circuit is connected with the protection circuit; the DC ends of the rectification circuits in the plurality of rectification modules are connected in series and then are connected with the DC output end. After the rectification modules are independently packaged, the rectification modules are connected in series. And in the aspect of production and manufacturing, the production cost is reduced, the procureability is improved, batch production is easy, and the reliability of the rectification module circuit is improved. In the aspect of user use, the independently packaged rectification module is used, maintenance and replacement are easy, and the maintenance cost is reduced.