Patents
Literature
Patsnap Eureka AI that helps you search prior art, draft patents, and assess FTO risks, powered by patent and scientific literature data.

22results about How to "Avoid loose installation" patented technology

A computer host device

The present invention relates to the field of computer technology, and discloses a host device of a computer, comprising a chassis, a cover plate, a mounting plate, an exhaust fan, an exhaust pipe, and a connecting seat. The cover plate is fixed to the chassis by bolts, the mounting plate is arranged at the inner wall of the chassis, the exhaust fan is mounted on the mounting plate, the mounting plate is used to install host components, the exhaust pipe is vertically fixed to the plate surface of the cover plate, one end of the exhaust pipe penetrates the plate surface of the cover plate and is provided with a protective net, the other end of the exhaust pipe is fixedly connected to the connecting seat, an exhaust channel is opened on the connecting seat, when the cover plate is matched and mounted on the chassis, the connecting seat and the frame of the exhaust fan are matched and contacted, when the host device is working, the exhaust fan extracts the hot gas in the chassis, and then discharges it through the connecting seat and the exhaust pipe, and by transporting and discharging the hot gas through pipelines, it can be prevented that the hot gas is dispersed everywhere in the chassis, and the efficiency of sucking out the hot gas is improved, thereby improving the heat dissipation and cooling of the host device.
Owner:SHENYANG CHENJUNXIN TECH CO LTD

A type of magnesium oxide board for ceiling decoration

ActiveCN224769652Uavoid exposureEasy insertion
This utility model discloses a magnesium oxide board for ceiling decoration, including a magnesium oxide board body. The surface of the magnesium oxide board body has mounting holes, and a top sleeve and an adjusting sleeve are respectively inserted into the mounting holes. The adjusting sleeve is threadedly connected to the top sleeve. This utility model, through the design of the top sleeve, adjusting sleeve, rotating groove, and side block, creates mounting holes on the surface of the magnesium oxide board body for installing the adjusting sleeve and top sleeve. The adjusting sleeve and top sleeve are inserted into the mounting holes and connected by threads. When installing the magnesium oxide board body, the adjusting sleeve is screwed on, and the adjusting sleeve and top sleeve are driven by threaded screws, causing the top sleeve to rise and fall axially, so that the top of the magnesium oxide board body fits against the mounting surface. Then, screws are used to fix it to the mounting surface, achieving decorative ceiling installation. This effectively avoids problems such as tilting or gaps in the installation position caused by uneven mounting surfaces, resulting in unstable installation.
Owner:HEBEI SENCHEN BUILDING MATERIALS MFG CO LTD

Air inlet filter element structure of fuel engine unit

The utility model relates to an air inlet filter element structure, in particular to an air inlet filter element structure of a fuel engine unit, which comprises a filter box, and a breather pipe and a fixing frame are fixedly mounted on the filter box. An air inlet pipe is fixedly mounted on the cover plate, and a limiting groove is formed in the cover plate; the connecting piece is arranged on the filter box and comprises a limiting plate; the filter element is embedded with the fixing frame in a sliding manner; a plurality of groups of filter holes are formed in the filter element; the fastener comprises a plurality of groups of wedge blocks which are used for being clamped with the filter element, and the plurality of groups of wedge blocks are arranged in a sliding manner in the circumferential direction of the filter box at equal intervals; through the extrusion effect of the wedge block and the filter element, sliding of the filter element on the fixing frame is limited, the phenomenon that a gap exists between the filter element and the ventilation pipe, and consequently plugging failure is caused is avoided, and the protection effect on the combustion chamber is improved; and the filter element and the filter box are connected through the fastener, so that infirm installation caused by dust accumulation can be effectively avoided, and the labor cost and the time cost for cleaning the filter box can be reduced.
Owner:WUXI LEES POWER CO LTD

Aluminum alloy door and window hinge installation puncher

The utility model belongs to the technical field of punchers, and particularly relates to an aluminum alloy door and window hinge installation puncher which comprises a first fixing plate. The device is characterized in that one side of the first fixing plate is fixedly connected with a first buffering shaft, the end, away from the first fixing plate, of the first buffering shaft is sleeved with a second buffering shaft, the end, away from the first buffering shaft, of the second buffering shaft is fixedly connected with a second fixing plate, and the position of the positioning plate can be accurately adjusted through transverse sliding of a sliding block on the roller shaft; the punching device can accurately control the transverse position and perpendicularity of punching in combination with the guide of the positioning pipe to the drill bit, avoids infirm hinge installation caused by punching deviation, further ensures the position precision and depth consistency of punching through the arrangement of the limiting protection structure and the through pipe, effectively improves the installation quality of the aluminum alloy door and window hinge, and improves the production efficiency of the aluminum alloy door and window hinge. The door and window can be opened and closed smoothly after being installed, and sealing performance and stability are better.
Owner:JINAN CONCENTRIC CIRCLE DECORATION ENG CO LTD

Bolt not prone to slipping

ActiveCN222436796Uincrease frictionAvoid loose installationNutsBoltsStructural engineeringFriction force
The utility model discloses a non-slip bolt which comprises a bolt body, a bolt head and a dismounting groove and further comprises a mounting groove formed in the bolt head. The anti-skid unit is fixedly mounted in the mounting groove; the anti-skid unit comprises a support plate fixedly mounted in the mounting groove; the plurality of anti-skid blocks are uniformly distributed on the inner wall of the supporting plate; wherein the number of the anti-skid blocks is equal to that of the inner corners of the disassembly and assembly groove; the bolt further comprises a plurality of limiting grooves which are formed in the bolt head and communicate with the mounting groove. The anti-skid grains are arranged on the outer walls of the anti-skid blocks; wherein the outer ends of the multiple limiting grooves extend out of the inner wall of the disassembling and assembling groove, the multiple anti-skid blocks are installed in the limiting grooves correspondingly, in daily production and life, through arrangement of the installation groove, the supporting plate, the anti-skid blocks and the limiting grooves, the friction force between the disassembling and assembling groove and the disassembling and assembling tool is increased, and sliding is not prone to occurring during disassembling.
Owner:瑞安市恒发汽车部件有限公司

Condenser mounting bracket easy to mount and adjust

The utility model provides a condenser installation support easy to install and adjust, and relates to the technical field of condenser installation, the condenser installation support comprises a condenser body, and the two ends of the outer bottom of the condenser body are connected with installation plates through fixedly installed insertion blocks. And a clamping assembly used for limiting and fixing the condenser body is arranged in the mounting plate. The condenser body is placed on the outer top of the mounting plate, the inserting block is inserted into the inserting opening, then the rotary knob is screwed, the gear drives the rack to move oppositely or reversely, then the sliding block pushes the fixing rod to be sequentially inserted into the inner side of the second inserting hole and the inner side of the first inserting hole, the inserting block is limited, and the condenser body is fixed. The condenser body can be mounted on the mounting plate by rotating the bolt, so that the purpose of quickly mounting the condenser body is achieved, and meanwhile, the problem that the condenser is not firmly mounted on the mounting bracket in the later period due to repeated bolt disassembly and assembly is avoided.
Owner:BEIJING AOTWA REFRIGERATION EQUIP

Coal blocking alarm device for medium-speed coal mill

The application belongs to the technical field of coal mill safety equipment, and discloses a medium-speed coal mill coal blocking alarm device, which comprises a controller, an alarm lamp and a sensor, a signal interface and an assembling cavity are respectively arranged on the back of the controller, and an intermediate hole is arranged in the inside of the back of the controller. The gas is pressed into the elastic air bag through the cooperation of the rotating extrusion, the inflation effect after the inside of the elastic air bag is ventilated is utilized, the signal connector maintains good sealing after being sleeved, the air in the signal interface is extracted when the movable plug in the suction assembly is moved by the cooperation of the operation assembly, the signal connector is adsorbed and fixed after being sleeved with the sealing frame under the negative pressure, the stability after actual wiring installation is greatly improved, good plug-in stability can be maintained under external force pulling or vibration effect, the situation of relaxation and disconnection can be effectively avoided, the frequency of arranging artificial maintenance and troubleshooting can be reduced, the use effect is good, and the monitoring and alarm are stable and reliable.
Owner:NAT ENERGY CHANGYUAN WUHAN QINGSHAN THERMAL POWER CO LTD

Protective net structure for building engineering construction

The utility model discloses a protective net structure for constructional engineering construction, which relates to the technical field of protective net installation and comprises a protective net consisting of a net cloth main body and an I-shaped reinforcing ring, and the I-shaped reinforcing ring is pressed and fixed on the edge of the net cloth main body and penetrates through the upper surface and the lower surface of the net cloth main body. The plurality of I-shaped reinforcing rings are arranged along the edge track of the mesh cloth main body, the mesh cloth main body is connected with a quick-mounting assembly through the I-shaped reinforcing rings, and the quick-mounting assembly is used for realizing the mounting connection of the protective net and a steel pipe. According to the utility model, efficient connection between the protective net and the steel pipe can be realized by arranging the quick-mounting assembly, compared with the traditional binding operation of iron wires or binding bands, the whole mounting operation is easier and more convenient, the situation of mounting looseness can be effectively avoided, and the mounting efficiency and stability of the protective net can be further improved.
Owner:SHANDONG ORIENTAL GARDEN CONSTR CO LTD

A tool box for a vehicle

ActiveCN224589059Uno offsetAchieving longitudinal locking
This utility model discloses a vehicle toolbox, belonging to the field of automotive parts technology. It includes a circular toolbox body with a tool recess inside and a frustum-shaped exterior. A mounting hole is located at the center of the toolbox body, and a locking mechanism is provided in the mounting hole. Several connecting holes are located outside the mounting hole, each containing a locking mechanism. In this utility model, the toolbox body and spare tire are secured horizontally, tightly engaging the toolbox with the spare tire hub. This, combined with the longitudinal locking mechanism, forms a "double longitudinal and transverse fixation," completely eliminating lateral relative movement between the toolbox and the spare tire and preventing abnormal noises caused by lateral collisions.
Owner:GUANGZHOU PANYU DONGBANG YIFENG STYROFOAM CO LTD

Plug-in vortex shedding flowmeter

The utility model provides a plug-in type vortex shedding flowmeter which comprises a plug-in type vortex shedding flowmeter body, the bottom end of the plug-in type vortex shedding flowmeter body is connected with a connecting pipe, and the two sides of the plug-in type vortex shedding flowmeter body are respectively provided with a first arc-shaped clamping plate and a second arc-shaped clamping plate in an attached and sleeved mode. According to the plug-in vortex shedding flowmeter, the plug-in vortex shedding flowmeter body is clamped by the first arc-shaped clamping plate and the second arc-shaped clamping plate, and the first arc-shaped clamping plate and the second arc-shaped clamping plate are fixedly connected with the connecting pipe through the connecting bent rod, the first pipe clamp and the second pipe clamp; the installation stress point of the plug-in vortex shedding flowmeter body and the connecting area of the plug-in vortex shedding flowmeter body and the connecting pipe are increased, installation is more stable, it is guaranteed that when the plug-in vortex shedding flowmeter body works, the vortex shedding flowmeter cannot shake or move due to too large impact force of fluid in a pipeline, the stability of the vortex shedding flowmeter in the using process is guaranteed, and the service life of the vortex shedding flowmeter is prolonged. And the detection accuracy is improved.
Owner:ZHONGYI INSTR (TIANJIN) CO LTD

Internet security probe convenient to install

The utility model discloses an internet security probe convenient to install, which is characterized in that the upper surface of an installation seat is provided with an embedding groove, the front surface of the embedding groove is provided with two first installation grooves, the inner surfaces of the two first installation grooves are fixedly connected with a fixed column, the outer surface of the fixed column is rotatably connected with a rotating lock rod, and the rotating lock rod is connected with a rotating shaft. A second mounting groove is formed in the side wall of the rotating lock rod, a rotating rod is rotationally connected to the inner surface of the second mounting groove, connecting blocks are rotationally connected to the upper side and the lower side of the rotating rod, sliding rods are fixedly connected to the side walls of the connecting blocks, and abutting buttons are in threaded connection to the front surfaces of the sliding rods; the rear surface of the abutting button abuts against a spring. By arranging a linkage structure formed by the abutting button, the spring, the sliding rod, the rotating rod, the rotating locking rod and the like, tedious operations such as screw turning in the installation process are greatly reduced, the installation time is greatly shortened, and the labor intensity of installation personnel is reduced.
Owner:SHENZHEN JIUYANG SECURITY INTELLIGENT ENG CO LTD

Gypsum board hanging bracket

The utility model provides a gypsum board hanging bracket, which relates to the technical field of gypsum boards and comprises a hanging bracket, two force bearing plates are arranged in an inner cavity of the hanging bracket, supporting plates are fixedly connected to two sides of the top of each force bearing plate, a bidirectional screw rod is arranged at the top of each force bearing plate, two screw sleeves are sleeved on an outer ring of each bidirectional screw rod, and the outer ring of each bidirectional screw rod is fixedly connected with the corresponding supporting plate. Sliding blocks are fixedly connected to the outer surfaces of the threaded sleeves, sliding grooves are formed in the tops of the force bearing plates, the bottoms of the sliding blocks penetrate through inner cavities of the corresponding sliding grooves to be fixedly connected with connecting plates, and hooks are fixedly connected to the bottoms of the connecting plates. According to the utility model, the hanging bracket matched with the gypsum board can ensure that the gypsum board is stably hung in the air during moving, so that the risk of infirm installation or falling caused by size mismatching is avoided, the gypsum board is protected, the construction efficiency and quality are improved, the building and decoration processes are smoother, and the safety of a construction site is improved.
Owner:GUIZHOU ZONGYI ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD

Multi-compatible charging module support for charging pile

The utility model discloses a multi-compatible charging module support for a charging pile, which comprises three groups of mounting supports, and each group of mounting supports is composed of a first mounting rack and a second mounting rack. The fixing rod is arranged in the middle of the inner side of the first mounting frame, the fixing rod and the first mounting frame are integrally cast and formed, a movable rod is arranged in the middle of the inner side of the second mounting frame, the movable rod and the second mounting frame are integrally cast and formed, and an extension rod is fixedly arranged at the other end of the movable rod; one end of the extension rod extends into the fixed rod, and the extension rod and the fixed rod are limited in a sliding manner; and the clamping plates are arranged in the first mounting frame and the second mounting frame, and the clamping plates are in sliding limiting with the first mounting frame and the second mounting frame correspondingly, so that the problem that the compatibility of the charging pile mounting bracket is continuously reduced due to more and more types of charging modules is solved.
Owner:SHENZHEN JIAWA DIGITAL ENERGY CO LTD

Automatic assembling equipment for cylinder body and cylinder cover of air pump motor

According to the automatic assembling equipment for the air pump motor cylinder body and the cylinder cover, multiple mechanisms are arranged and matched with one another, during assembling, firstly, a cylinder body feeding mechanism feeds the cylinder body to a fixing jig of a rotating disc, then the rotating disc rotates to drive the cylinder body to be transferred to a tongue piece feeding station, and the tongue piece feeding station is used for feeding the cylinder body; a worker places a tongue piece on a cylinder body at the tongue piece feeding station, then the rotary disc continues to drive the cylinder body and the tongue piece to move backwards to the position of the cylinder cover feeding mechanism, the cylinder cover feeding mechanism feeds a cylinder cover to the upper end face of the cylinder body, the rotary disc continues to drive the cylinder body, the tongue piece and the cylinder cover to move backwards continuously, and when the cylinder body, the tongue piece and the cylinder cover reach the position of the screw locking mechanism, the cylinder cover is locked. The screw locking mechanism carries out screw locking on the cylinder cover and the cylinder body, the cylinder cover is locked to the cylinder body to achieve automatic assembly of the whole air pump motor, the labor intensity of workers can be reduced through mechanical machining, the assembly efficiency is improved, and meanwhile due to programmed control, the labor intensity of the workers is reduced. The problem that the air pump motor is not firmly installed due to the fact that the screws are not tightly screwed is solved.
Owner:GUANGDONG ZHAOLI ELECTRIC GROUP CO LTD

A modular metal pipe end forming mold

ActiveCN224614917Usmooth slidingRestricted movement process
This utility model discloses a combined metal pipe end forming mold, comprising: a mold body, which includes two mold units symmetrically arranged facing each other; each mold unit includes a mold body, a slider, a pressure plate, and a baffle; the mold body has a cavity, and the end of the cavity has a forming groove; the metal pipe is placed in the cavity; the slider is slidably connected to the mold body and elastically connected to the end face of the mold body; the slider has a clamping groove corresponding to the cavity; symmetrically arranged protrusions are provided on both sides of the slider; the pressure plate is fixedly installed on the main mold body; the side wall of the pressure plate has a guide groove corresponding to the protrusions; and the baffle is fixedly installed on the mold body; a punch has a positioning groove, and a positioning rod is provided on the bottom surface of the positioning groove. Compared with the prior art, this utility model solves the problem of poor sliding restriction effect of existing metal pipe end forming molds on the forming slider.
Owner:KUNSHAN VERITAS AUTOMOTIVE SYST CO LTD

A sewage treatment suspended filler interception device

The utility model provides a kind of sewage treatment suspended filler interception device, it is related to sewage treatment field, and it includes: access hole, the bottom end of access hole inner wall is connected with the insertion of columnar filter screen, the outer wall of columnar filter screen is slidably equipped with annular scraper, one side of annular scraper is fixed with moving block, the bottom end of access hole inner wall is connected with the insertion of the moving rod fixed with moving block, lifting assembly is set in the inner wall of access hole, based on the sewage treatment suspended filler interception device of the embodiment of the application, when needing to clean columnar filter screen, under the movement of lifting assembly, the up-down movement of moving rod is driven, moving rod drives the up-down movement of moving block, moving block is driven the up-down movement of annular scraper, the inner wall of annular scraper is in contact with the outer wall of columnar filter screen, so in annular scraper movement, the surface of columnar filter screen can be cleaned, without columnar filter screen disassembly, the quick cleaning of columnar filter screen is convenient, and the cleaning efficiency of columnar filter screen is improved.
Owner:WUHAN XINTIAN DAMEI ENVIRONMENT TECH CO LTD

A foundation bolt nut anti-loosening structure for electromechanical equipment

This utility model discloses an anti-loosening structure for anchor bolts and nuts of electromechanical equipment, belonging to the field of anchor bolts. It includes a washer and a fastening assembly. The upper top of the washer is threadedly connected to an equipment plate via a fastening bolt. The fastening assembly includes an A fastening nut threadedly connected to the outer wall of the fastening bolt. The upper top of the A fastening nut is threadedly connected to a meshing washer via a meshing bolt. A toothed ring is fixedly connected to the upper top of the meshing washer. Through the coordinated use of the above devices, the stability of the electromechanical equipment after installation is improved, and the nuts and bolts are prevented from loosening due to vibration after installation. The forward and reverse threaded connections can prevent loosening due to poor thread self-locking. Furthermore, through multiple toothed rings and toothed seats, when subjected to vibration, the meshing teeth collide with each other to offset part of the vibration force, thereby preventing loosening during installation.
Owner:PINGDINGSHAN RUIYUAN MECHANICAL & ELECTRICAL EQUIPMENT CO LTD

Electrode mounting structure and quartz heater tube thereof

ActiveCN224596621Unested tightlyEasy to installThermodynamicsElectric wire
This utility model discloses an electrode mounting structure and its quartz heating tube, including: a heating tube body, an electrode, a wire, a fixing block, and an elastic element. The fixing block has a side through hole, the wire is fastened to the electrode, the electrode is housed in the inner cavity of the fixing block, the heating tube body is inserted into the fixing block, and the electrode is sleeved on the outer wall of the heating tube body. The elastic element is located in the side through hole, and the lower end of the elastic element presses against the open end of the electrode, thereby keeping the electrode firmly pressed against the heating tube body. In this utility model, the electrode and the heating tube body can be tightly connected simply by inserting the elastic element into the fixing block from the side, and the electrode installation is not limited by the narrow installation space inside the heating device. At the same time, when the electrode deforms due to temperature changes, the elastic element always keeps the electrode firmly pressed against the heating tube body, and the electrode installation remains stable, avoiding the problem of the electrode becoming loose or deformed due to compression.
Owner:GUANGDONG HALLSMART INTELLIGENCE TECH CORP LTD

Assembly type LED screen mounting base

The utility model discloses an assembly type LED screen installation seat, which belongs to the technical field of LED screen installation, and comprises an installation seat main body, the installation seat main body comprises an assembly seat I and an assembly seat II, four corners of the assembly seat I and four corners of the assembly seat II are all provided with fixing bolts in a threaded manner, and the assembly seat I and the assembly seat II are fixed through bolts. A fixing seat is fixedly installed on the side face of the first assembling seat, and a horizontal fine adjustment groove is formed in the side face of the fixing seat. The mounting base body is assembled by arranging the first assembling base and the second assembling base in a matched mode, and after the first assembling base and the second assembling base are fixed to the mounting face and the LED screen through fixing bolts correspondingly, convenient dismounting operation of the first assembling base and the second assembling base is achieved through the dismounting base, the dismounting inserting plate and the dismounting clamping plate; subsequent maintenance and disassembly can be achieved only through the disassembly and assembly insertion plate and the disassembly and assembly clamping plate, the fixing bolt does not need to be screwed repeatedly, the disassembly and assembly operation convenience is improved, and the problem that installation is loosened easily due to the fact that the fixing bolt is screwed repeatedly is solved.
Owner:SHENZHEN VISUALEADER IND CO LTD

Railway cast-in-situ box girder hydraulic inner mold and test process thereof

PendingCN122504113Amove normallynormal construction
The application discloses a railway cast-in-place box girder hydraulic inner mold and relates to the technical field of railway cast-in-place box girder construction. The hydraulic inner mold comprises an adjusting assembly, the adjusting assembly comprises an inner mold, a connecting support is arranged in the inner mold, a hydraulic oil cylinder is arranged at the top of the connecting support, a supporting beam is arranged at the top end of the hydraulic oil cylinder, connecting seats are symmetrically arranged at the two ends of the supporting beam, a fixing frame is rotatably installed through the connecting seats, and a first adjusting frame is connected to one side of the fixing frame. The adjusting assembly is arranged to adjust the two symmetrically arranged first adjusting frames through hydraulic pressure. When the inner mold is controlled to move in the box girder, the inner mold can be controlled to shrink according to the moving condition through hydraulic pressure adjustment, so that the normal movement of the inner mold is ensured, the movement interference between the inner mold and the web plate in the box girder is avoided, the problem that the existing device cannot be adjusted and is prone to movement interference during movement and cannot support movement is solved, the normal construction is ensured, and the construction efficiency is effectively improved.
Owner:SHANDONG SHIDAI STRESS ENG TECH CO LTD

Multifunctional detection device for geological mineral exploration

The utility model relates to the technical field of geological mineral exploration, and provides a multifunctional geological mineral exploration detection device which comprises a base, one side of the top end of the base is fixedly connected with a fixing seat, and the output end of a servo motor extends into a fixing groove and is fixedly connected with a lifting threaded rod through a coupler. The surface of the lifting threaded rod is in threaded connection with a lifting threaded block, one side of the lifting threaded block is fixedly connected with a sliding plate, the output end of the driving motor penetrates through the sliding plate and is fixedly connected with a sampling barrel through a coupler, and the surface of the sampling barrel is movably connected with a drilling barrel. By rotating the rotating handle, the bottom end of the protective cover is tightly attached to the ground, then potential safety hazards caused by too far spattering of broken stones generated during drilling can be avoided through the protective cover and the base, spraying and dust falling are conducted through the spraying ring pipe, discomfort of breathing of workers caused by too much splattering of dust is avoided, and then the practicability of the device can be improved.
Owner:HEILONGJIANG INST OF GEOLOGICAL SCI

Photovoltaic module mounting frame

The utility model belongs to the technical field of photovoltaic module installation, and particularly discloses a photovoltaic module installation frame which comprises an installation frame, a waterproof cotton block is arranged on the inner wall of the installation frame, a socket is movably inserted in the installation frame, an adaptive groove is formed in the outer surface of the socket, an installation base is fixedly connected to the outer surface of the socket, and the waterproof cotton block is arranged on the inner wall of the installation frame. An expansion water stop strip is arranged at the end, close to the mounting base, of the outer surface of the socket, and a photovoltaic panel is fixedly connected to the mounting base. According to the photovoltaic module mounting frame, rapid mounting and dismounting of the photovoltaic panel are realized through plugging cooperation of the socket and the mounting frame and an ingenious locking mechanism of the hook claw and the limiting hook, and the expansion water stop strip expands after meeting water and is tightly attached to a gap between the mounting frame and the mounting seat, so that an effective waterproof barrier is formed; the design not only enhances the sealing performance of installation, but also improves the firmness degree of connection, so that the installation stability of the photovoltaic module is improved while the interior of the installation frame is protected from being corroded by water.
Owner:GUANGDONG DONGAN POWER ENG CO LTD