660results about How to "Meet the installation requirements" patented technology

The invention discloses a quick connecting device with changeable rigidity, and belongs to the technical field of mechanical design. The device comprises a motor, a motor fixing plate, an awl disc, a guide rail, a spring piece, a quick connecting component a, a quick connecting component b and an abutting plate. The motor fixing plate is used for connecting a module a, and the abutting plate is used for connecting a module b. The motor is mounted on the motor fixing plate, and one end of the guide rail fixes the motor fixing plate while the other end of the same fixes the quick connecting component a. The quick connecting component b is connected outside the quick connecting component a in a sleeved manner. The abutting plate is connected outside the quick connecting component b in a sleeved manner to realize abutting joint. Functions of quick connection and rigidity changing are integrated, so that convenience is brought to modularized production and application, and industrial application and promotion are facilitated. Through ingenious mechanical structure design, the functions of quick connection and rigidity changing are driven by a same device to be completed, number of needed driving units is reduced, production cost is reduced, and size of the device is diminished.

The invention discloses an assembling and welding platform for pipelines. The assembling and welding platform comprises a worktable, a flange holding device and a pipeline holding device, wherein the flange holding device comprises a fixed disc and a movable disc arranged concentrically, the fixed disc is fixed on the worktable and the moveable disc is installed on the fixed disc rotatably, a hanging device for hanging the flange is arranged on the moveable disc and the fixed disc is provided with scales that mark the rotary angle of the moveable disc; and the pipeline holding device is used for supporting the pipelines and is installed on the worktable, wherein a pipeline is supported by the pipeline holding device so as to realize butt joint with a welding port of the flange. The assembling and welding platform for pipelines can meet assembled welding of the flange and the pipelines and provides convenience for presetting the pipelines.

The invention provides a battery mounting and fixing structure of a purely electric automobile, which comprises a rear floor front cross beam assembly, a rear floor rear cross beam, left and right rear longitudinal beams and rear longitudinal beam battery left and right mounting frames. The rear floor front cross beam assembly is mounted on the front ends of the left and right rear longitudinal beams by bolts and connected with a rear floor; the two ends of the rear floor rear cross beam are arranged on the rear ends of the left and right rear longitudinal beams by bolts and connected with the rear floor; and the rear longitudinal beam battery left and right mounting frames are welded with the middle parts of the let and right rear longitudinal beams respectively. The rear floor front cross beam assembly, the rear floor rear cross beam and the rear longitudinal beam battery left and right mounting frames are provided with battery mounting holes respectively. The fixing structure is a frame structure, can reasonably bear the weight of a battery pack and optimize the torsional rigidity of the vehicle body, and is excellent in assembly process and convenient in mounting and detachment.

The invention discloses a corrugated steel web prestressed concrete continuous box girder. In the box girder, after being fixedly connected with a corresponding steel bar in a cast-in-place member, transverse steel bars of a precast concrete top plate, a precast concrete bottom plate and a precast concrete beam or a precast concrete diaphragm plate of two adjacent corrugated steel web prestressed concrete flanged beam units which are erected are connected by a cast-in-place concrete top plate between the adjacent precast concrete top plates, a cast-in-place concrete bottom plate between the adjacent precast concrete bottom plates and a cast-in-place concrete beam or a cast-in-place concrete diaphragm plate between the adjacent precast concrete beams or precast concrete diaphragm plates to form closed box girders; and external prestressed bars in the closed box girders are pulled and anchored, the closed girders corresponding to two adjacent holes are connected by pouring cast-in-place concrete longitudinal beams, hogging moment prestressed bars on pillar tops are pulled and anchored, and temporary supports are removed to form the continuous box girder. The corrugated steel web prestressed concrete continuous box girder has the characteristics of high stressed performance, high utilization rate of materials and obvious economic benefit, and is easy and convenient to construct.

The invention discloses a door frame type multi-functional support trolley for a tunnel. The door frame type multi-functional support trolley for the tunnel comprises a door frame and a working platform. The top end of the door frame is provided with a sliding groove track and an arch centering mounting device. The arch centering mounting device comprises a traveling bogie and a lifting device, wherein the traveling bogie is capable of moving backward and forward on the sliding groove track. The lower side of the lifting deviceis fixed to the traveling bogie. The left side and the right side of the lifting device are provided with left-right moving mechanisms and left-right moving tracks for the left-right moving mechanisms to move correspondingly. The left-right moving mechanisms are provided with transportation supports. The sliding groove track comprises a fixed sliding groove track and a movable sliding groove track with the same gauge. The fixed sliding groove track is fixed to the rear of the top end of the door frame and the tail end of the fixed sliding groove track is beyond the tail end of the door frame. The movable sliding groove track is fixed to a sliding platform in the middle of the front of the top end of the door frame. The rear end of the sliding platform is hinged to one end of a sliding cylinder, and the other end of the sliding cylinder is hinged to the door frame. According to the door frame type multi-functional support trolley for the tunnel, the arch centering mounting requirements of a micro-step excavation and support construction method of very weak surrounding rock can be met, and the working procedure time occupied by the arch centering mounting is shortened.

The invention relates to a flat plate vapor chamber and a manufacturing method thereof. The flat plate vapor chamber comprises a packaging chamber, a porous capillary wick, a working medium and a vacuumizing and work medium filling interface, wherein the porous capillary wire and the working medium are positioned inside the packaging chamber; one end of the vacuumizing and work medium filling interface is communicated with the inside of the packaging chamber; and the other end of the vacuumizing and work medium filling interface is positioned outside the packaging chamber and is sealed. The manufacturing method of the flat plate vapor chamber comprises the following steps of: forming the packaging chamber by extruding or casing; forming the porous capillary wick by sintering or knitting; inserting the porous capillary wick into the packaging chamber; placing one end of the vacuumizing and work medium filling interface in the packaging chamber; extruding the packaging chamber by using a cold press die; moving away the cold press die; welding and sealing a front-rear end closing surface of the packaging chamber; vacuumizing the packaging chamber and filling a working medium; and pinching off the vacuumizing and work medium filling interface and welding and sealing the vacuumizing and work medium filling interface. According to the flat plate vapor chamber disclosed by the invention, the defects of limited structure, high manufacturing cost, low reliability, limited heat-radiating capability and the like in a traditional vapor chamber are fully overcome.

The invention discloses a power coupling and transmitting device for a hybrid power vehicle. The device comprises a speed changer-front box body, a motor stator and a motor rotor, and is characterized in that: a torque limited clutch and a one-way clutch are arranged between a flywheel of an engine and the motor rotor; a gear shift clutch is arranged between the motor rotor and the output shaft of a speed changer; the motor rotor is connected with the input shaft of the speed changer in a matching way through the gear shift clutch; the motor rotor, the torque-limited clutch and the gear shift clutch are overlapped in the axial direction and are nested mutually in the radial direction; and the torque limited clutch and the one-way clutch are overlapped in the axial direction and are nested mutually in the radial direction. The device overcomes the disadvantages of large volume and large axial size of a hybrid power assembly, meets the transverse installation requirement on front-engine front wheel drive within limited space, can accurately control a starting torque when an engine is started in pure electric dive, and ensures the comfort of a driver.

The invention discloses an inductor, comprising a baseplate which is provided with at least one magnetic core, at least one coil which can be socket jointed on the magnetic core, a magnetic cap consisting of a top wall and a side wall to form at least one hollow chamber for containing the magnetic core and coil, and an electrode arranged on the baseplate for connecting a lead terminal of the coil and an external circuit, wherein, the magnetic cap is provided with a gaping place going through the side wall and top wall of the magnetic cap, and the gaping place is used for leading out the lead terminal of the coil to be connected with the electrode. The invention is applicable to various electronic aids, in particular to the electronic products needing to take full advantage of space such as mobile phones and notebook PC.

The invention discloses a novel PCB separator. The novel PCB separator comprises a frame, an X-axle moving mechanism, a Y-axle moving mechanism, a Z-axle moving mechanism, a tool tray, a main shaft cutting mechanism, a linked dust sucking mechanism and a dust collection and filter mechanism; the linked dust sucking mechanism is in transmission connection with the X-axle moving mechanism, and can synchronously move along with the main shaft cutting mechanism on the X-axle moving mechanism to suck dust on PCBs on the tool tray; a dust sucking part of the linked dust sucking mechanism is connected with an inlet of the dust collection and filter mechanism through a pipe; and an outlet of the dust collection and filter mechanism is connected with an air sucker through another pipe. The novel PCB separator is reasonable in structural design, stable and reliable in operation, convenient to operate, high in machining precision, excellent in dust sucking effect and high in efficiency, can thoroughly remove the dust, and can realize linear and curve trajectory cutting. In addition, the dust collection and filter mechanism needs no disposable dust collection bag, can achieve recycling after cleaning to prevent the resource waste, and is low in cost and excellent in dust collection and filter effect.

The invention discloses a bearing type RV speed reducer, and belongs to the technical field of speed reducers. The speed reducer comprises a pin wheel housing, an installation frame is arranged in the pin wheel housing in a rotary mode, the installation frame is provided with two cycloid gears in transmission connection with the pin wheel housing through needle rollers, the installation frame is rotatably provided with a power input shaft, the power input end of the power input shaft extends out of the installation frame, the power input shaft is provided with two eccentric drive wheels which penetrate through the centers of the two cycloid gears respectively and are matched with the corresponding cycloid gears, the installation frame is rotatably provided with at least two positioning shafts which are symmetric to the rotation center of the power input shaft, and each positioning shaft is provided with two eccentric transmission wheels which penetrate through the two cycloid gears respectively and are matched with the cycloid gears. Power center input and first speed reduction are achieved. Compared with the prior art, the bearing type RV speed reducer reduces the number of power input shafts and use of sun gears and planetary gears, manufacturing cost is low, transmission is reliable, machining and installation are convenient to achieve, and service life is prolonged.

The invention discloses a modular flexible connection device allowing dynamic adjustment of the stiffness and belongs to the mechanical design technical filed. An upper top plate is fixed on an installing ring, a bearing installing frame is fixed on a lower base plate through a connecting column, and accordingly the upper top plate and the lower base plate can only rotate relative to each other to maintain the mutual distance to be fixed and accordingly the required stable connection function is achieved. The stiffness variable function is achieved through the change of the relative position of a sliding block and the tail end of a spring piece. When a wire rolling shaft rotates, the reciprocating motion of the sliding block can be ensured along with the extension and retraction of two steel wires and accordingly the relative position of the sliding block and the tail end of the spring piece can be changed. According to the modular flexible connection device allowing the dynamic adjustment of the stiffness, the stable connection and stiffness variable functions are integrated into a whole and accordingly the modular production and utilization is convenient and the industrial application and popularization is convenient and the structural design is compact, the size is small, and accordingly the installation requirements under the condition that the size is limited can be met.

The invention provides a self-restoration energy-consuming cable support system for a multi-high-layer steel frame structure. The self-restoration energy-consuming cable support system comprises cable supports, support energy-consuming devices, connecting base plates and the like. Each cable support comprises a long cable and two short cables. Each support energy-consuming device comprises a large U-shaped notch, a small U-shaped notch, slipping high-strength bolt groups on the two sides of the corresponding cable support, energy-consuming steel ribs or steel rods, a pedestal base plate, steel rib and steel cable end socket anchorage devices and pedestal anchoring bolts. Each support cable is in series connection with the corresponding support energy-consuming device to form a self-restoration energy-consuming support system. The working mode of the support system is different from that of a traditional support, the energy-consuming devices are stored on the corners of a frame, and every two diagonal energy-consuming devices are in series connection with each other through the corresponding steel cable to form the X-shaped energy-consuming cable support system. Under the reciprocating load effect of the structure, X-shaped supports are alternatively pulled to be in a working state, and the structure can be pulled to an original position through internal force of the steel cables. According to the self-restoration energy-consuming cable support system for the multi-high-layer steel frame structure, through combination of high-strength cables, friction energy consumption, metal stretching and retracting energy consumption and self restoration, a good anti-knock self-restoration energy-consuming support is provided.

The invention discloses a steel latticed column homocentric-square-shaped concrete bearing platform combination type tower crane base structure. The base structure comprises four steel latticed columns vertically distributed in a rectangle. A horizontal diagonal bracing and a vertical diagonal bracing are arranged between the steel latticed columns, the bottoms of the steel latticed columns are inserted in a drilling pouring pile arranged under a base plate of a basement, a concrete structure bearing platform is poured under the base plate of the basement, a homocentric-square-shaped concrete bearing platform is poured at the top of the steel latticed columns, and the bottom of the tower crane is installed on the homocentric-square-shaped concrete bearing platform. Effect of self gravity of the concrete bearing platform on the steel latticed columns is considered, the concrete bearing platform is made to be homocentric-square-shaped to form a steel latticed column homocentric-square-shaped concrete bearing platform combination type tower crane base, tower crane construction safety can be ensured by adopting the base, and the problem of in-advance insertion in deep base pit construction vertical transportation is well resolved. Further, concrete smoothness can be well controlled to meet requirement of the tower crane for installation.

A highly integrated self-sensing hexa-axial conical vibration isolator relates to a semi-active vibration isolator and contains an upper end frame, an upper ball hinge seat, upper ball hinges, support leg members, lower ball hinges, a lower ball hinge seat and a conical frame; on the support leg members, a magneto-rheological damper, a die spring, a pull pressure sensor, a displacement sensor and an acceleration sensor are integrated. The vibration isolator is mounted between a base and a load subjected to vibration isolation, when the base generates vibration, the sensor integrated in the vibration isolator collects a vibration signal and feeds back to the controller, the controller performs operation and controls the size of a current that leads into the magneto-rheological damper, and a damping power size of the magneto-rheological damper is adjusted in real time, such that a vibration environment of the load subjected to vibration isolation is improved and the purpose of vibration isolation of the load subjected to vibration isolation is realized. The vibration isolator has the characteristics of high integration, multi-freedom degree vibration isolation, adjustable damping force, low power consumption, self-sensing feedback and the like, and can be widely applied to the fields where the vibration isolation is applied, such as aerospace, automobiles and ships.

The invention relates to the field of building curtain walls, in particular to a multi-layer cable truss curtain wall structure vertically arranged, and further provides a forming method of the multi-layer cable truss curtain wall structure. The multi-layer cable truss curtain wall structure comprises a plurality of parallel vertically-dragging cables and a plurality of horizontal trusses. The horizontal trusses are composed of inner chord members, outer chord members and web members. The upper surfaces of the inner chord members and the upper surfaces of the outer chord members are fixedly provided with upper-portion lug plates. The lower surfaces of the inner chord members and the lower surfaces of the outer chord members are fixedly provided with lower-portion lug plates. The lower-portion lug plate of the former horizontal truss and the corresponding upper-portion lug plate of the lower horizontal truss are connected through the vertically-dragging cables. According to the multi-layer cable truss curtain wall structure and the forming method thereof, the installation requirement of the glass curtain walls can be met, the stress condition of the cable truss curtain wall structure is simplified, the potential safety hazard is reduced, and the forming method can meet the requirement of the multi-layer cable truss curtain wall structure.

The invention discloses a method for lifting whole steel structure to the top of a concrete cabin through a slip form and low-altitude modular assembly. The method comprises the steps of assembling oblique beam units, assembling steel ring beams, assembling a slip form device, erecting a support ring beam scaffold platform, hoisting the steel ring beams, mounting the oblique steel beams, mounting a structure on a cabin top ring beam, hoisting the slip form system, and the like. As module units are assembled on the ground at the same time, the construction working area is increased, the assembling period is shortened, and the constriction duration is effectively shortened. Temperature and wind load influences when the unassembled large steel structure is assembled and measured at high altitude are reduced, the assembling precision is improved, and the engineering quality is ensured. As a great quantity of scaffolds are reduced duo to low-altitude assembling, and only a small quantity of simple scaffolds are needed to be erected, the mounting requirements can be met; meanwhile difficulty in high-altitude working, assembling and hoisting are reduced, and the security risk is effectively lowered.

The invention discloses a structure for automatically regulating mowing height of an intelligent mower, comprising a base and a shield, wherein the shield is provided with a blade motor with a blade, is connected on the base in a sliding mode along the axial direction of the blade motor and is also provided with a connection post arranged along the axial direction of the blade motor; the connection post is internally provided with an internal thread hole; an adjustable bolt is connected on the base in a rotary mode; the front end of the adjustable bolt is correspondingly screwed with the connection post, and the back end of the adjustable bolt is connected with a manipulation mechanism; and the manipulation mechanism comprises a start motor arranged on the base and a control assembly for controlling the start motor to work, and the start motor is connected with the back end of the adjustable bolt through a gear transmission mechanism. The structure can effectively solves the problem that the mowing height regulating system of the existing mower performs regulation by means of tools and is fussily manipulated.

The invention relates to a rolling bearing dynamic performance testing machine and a general frame thereof. The general frame includes two installation bases which are arranged at interval in left and right directions and in detachable support scaffold prefabrication with a matching cantilever shafting and a bridge type shafting. The frame also includes two radial loading stations which are arranged in the left and right directions in turn and used for installing radial loading devices so as to apply the radial action force to a test bearing. One of the two radial loading stations is a middle loading station correspondingly arranged between the two installation bases, and the other is an end loading station correspondingly arranged at a left side of the two installation bases. Different shafting can be selected according to actual test requirements, and the radial loading devices are installed to corresponding positions. One set of the general frame can satisfy installation requirements of two sets of shafting, and the universality is good.

The invention discloses a dust removal device of a tunnel dust removal vehicle. The tunnel dust removal vehicle comprises a closed carriage. The closed carriage is divided into a power distribution chamber and a dust removal chamber. The power distribution chamber is provided with a closed door and a radiating opening, and a power distribution device is arranged inside the power distribution chamber. The dust removal chamber is provided with a closed door, an air inlet and an air outlet, and the dust removal device is arranged inside the dust removal chamber and comprises an air duct, a filter net, a draught fan for dust collection and a dust storage bag, wherein the air duct is connected between the air inlet and the air outlet, the filter net is arranged at the end, close to the air inlet, inside the air duct, the draught fan for dust collection is arranged at the end, close to the air outlet, inside the air duct, and the dust storage bag is arranged below the filter net. The draught fan for dust collection is connected to a power distribution cabinet in the power distribution chamber to obtain power. By means of the tunnel dust removal vehicle and ancillary facilities of the tunnel dust removal vehicle, the dust removal requirements of the tunnel construction environment can be well met.

The invention relates to a circular furnace and heat supply technique thereof, belonging to technique field of furnace and kiln engineering. Combination heat supply of a heat accumulation burner and a normal burner is provided on the whole circular furnace. The circular furnace is divided into a heat recover segment, a warm-up segment, a heating segment and a soaking segment from the furnace tail to the furnace head. A heat supply device is not disposed on the heat recovery segment of the circular furnace, fume in the furnace flowing through the heat recovery segment transfers heat to material blank for primary warm-up of the material blank. A flame adjusting burn is disposed on the inner-outer circular furnace wall of the circular furnace warm-up segment for supplying heat to the circular furnace, and the material blank is further warmed up. The normal flame burner is disposed on the top of the circular furnace soaking segment for soaking material blank. Large temperature field required by installation and technique of double heat accumulation burners is provided, application of blast furnace gas with low heat value in the circular furnace is effectively solved, and the invention can be used in circular furnace in the steel industry.

The invention relates to an outdoor unit of an air conditioner. The outdoor unit comprises a case, wherein the inside of the case is divided into a compressor cavity and a heat exchange cavity by a baffle, a compressor and a pipeline are contained in the compressor cavity, and a heat exchanger and an outdoor fan are contained in the heat exchange cavity; the case consists of a top plate, side plates and a base disc; an air inlet and an air outlet are arranged on the case; the outdoor fan is a centrifugal fan; and the heat exchanger is arranged around the centrifugal fan. With the adoption of the outdoor unit, the accommodating space for the heat exchanger can be enlarged, the even distribution of air flows passing through the heat exchanger can be guaranteed to the maximum extent, and the heat exchange capacity of the outdoor unit and the heat exchange efficiency of the heat exchanger can be improved. In addition, the outdoor unit of the air conditioner adopts the centrifugal fan, can be changed into more forms, can be applied to general mounting conditions and can meet mounting requirements of certain specific places.

The invention discloses a three-dimensional omnibearing intelligent purging system for a rail transit vehicle. The three-dimensional omnibearing intelligent purging system is characterized by comprising an air supply system (1), an electrical control system (2), a moving purging system (3) and an air exhaust and dust removal system (4). The moving purging system (3) comprises a bottom moving purging robot (31) and a top moving purging robot (32); the air exhaust and dust removal system (4) is respectively connected to the operation areas through pipelines; the air supply system (1) is connected with the bottom moving purging robot (31) and the top moving purging robot (32) through flexible pipelines to provide high-pressure air for the bottom moving purging robot (31) and the top moving purging robot (32); and the electric control system (2) is used for monitoring environmental parameters in a rail transit vehicle purging workshop. Dust of the vehicle can be quickly and efficiently removed, the working environment in the purging warehouse is improved, and three-dimensional omnibearing purging of the bottom, the sides and the top of the rail transit vehicle is achieved.

The invention provides a double-hob experiment table cutter system and relates to an experiment cutter system. The cutter system can achieve bidirectional position adjustment and is characterized in that: the design of a hob rack can meet the requirement of mounting three types of hobs of 14 inches, 17 inches and 19 inches for experiment; the hobs are mainly arranged on flanges on both sides and a bottom supporting flange; two annular surfaces inside and outside a side face flange are connected with the hob rack to bear lateral impact load; the flanges are connected with a tool apron through bolts; the distance between the hob racks is adjusted by using a manual driving screw rod in an X direction and a Y direction which are vertical to each other, wherein the adjustment in the X direction is from -10 millimeters to 150 millimeters; the adjustment in the Y direction is from 300 millimeters to 500 millimeters; and the Y direction tool apron which bears main load is adjusted and locked through cooperation between the tool apron and saw-shaped threads on a cutter head pedestal. After the cutter system is applied in the hob experiment table, a measuring cell can be arranged to test hob stress and research rock breaking mechanism and cutter abrasion.

The invention relates to a tapered roller bearing with high strength and low friction torque, comprising an outer ring, an inner ring, a plurality of rollers and a cage, wherein the rollers are clamped between the outer ring and the inner ring and used for supporting and realizing relatively rotating; and the cage is used for guiding the rollers to move; a big rib of the inner ring is a convex curved rib; the root part width of the big rib of the inner ring is larger than 6.47 mm, and the axial depth of an oil groove is smaller than 0.5 mm; the raceway buses and the roller buses of the inner ring and the outer ring are in a logarithm curve convexity shape; the number of the rollers is less than 16, the length of the rollers is smaller than 24 mm, and the convex diameter of a raceway is small; the sphere base surface diameter of the rollers is smaller than 136 mm, and the diameter of the rollers is larger than 21.671 mm. The invention has long service life, saves the energy and reduces the energy consumption.

The invention discloses a controlled-unfolding coiled stretching arm for unfolding a satellite load. The stretching arm mainly comprises a stretching arm main body, a bottom storage tube, a Y-shaped top plate and an unfolding control assembly, wherein one end of the stretching arm main body is connected with the storage tube, the other end of the stretching arm main body is connected with the Y-shaped top plate, a driving unit in the unfolding control assembly is mounted at the bottom of the storage tube, and an unfolding control cable is connected to the Y-shaped top plate. The stretching arm has the characteristics of high storage ratio, light weight, high reliability and the like, can realize the linear-direction short-distance or middle / far-distance unfolding, is applicable to the unfolding of satellite loads, such as magnetometers, antennae and gravity gradient counterweights and has wide application adaptability.

An integrated pylon structure for a propulsion system is suitable for one end to be connected to an aircraft wing and the other end to be connected to an aircraft engine. The pylon structure includes a pylon box section (110) formed from an upper and a lower bean, a frame (100) and a side wall panel. The pylon structure has a thrust reverser hood connection structure, provided on the side wall and connected with a nacelle thrust reverser hood having a front fixed hood (301) and a rear movable hood (302). A guide rail allows the rear movable hood to slide and open relative to the pylon box section. The engine thrust reverser hood is directly connected to the side wall of the pylon box section and a guide rail on the side wall guides the opening of the thrust reverser hood.

The invention discloses a subway safety door capable of lifting vertically. The subway safety door comprises a door frame (1) formed by a left upright (11), a right upright (12) and a cross beam (13), a moving door body (2) and a lifting rope (3), wherein the insides of the left and right uprights are provided with protruding guide rails (14); the cross beam is provided with a fixed support (15) extending downward; the support is provided with an electrically driven device (16) and a drum device (17) driven by the electrically driven device; the outsides of the mullions of the moving door body are provided with grooves (21) which are matched with the guide rails (14) in a sliding manner, the inside of the moving door body is provided with a glass door body (22) and a sealing device (23); and one end of the lifting rope is fixed and wound on the drum device and the other end is fixed on the middle of the horizontal frame of the moving door body. The subway safety door can be installed in special place without occupying the side space and be better to be used at the end of the subway safety door.

The invention discloses an installation device for a centrifugal overload test of a solid rocket engine. The installation device comprises a rotating arm, an installation platform and steel wire tensioning mechanisms, wherein the installation platform is rotatably connected with the outer end of the rotating arm through a rotating shaft system; the rotating arm is internally provided with a plurality of lifting bolts; a cavity is formed between each lifting bolt and the installation platform; the steel wire tensioning mechanisms are arranged in the cavities; the first end of each steel wire tensioning mechanism is fixedly connected with the corresponding lifting bolt, and the second end of each steel wire tensioning mechanism is fixedly connected with the installation platform; a test piece is arranged in the installation platform. According to the installation device disclosed by the invention, the rotating shaft system has a locking function, bears the mass of a rotating cabin and installation parts in the rotating cabin and a transferred force and is conductive to installing the test-piece and adjusting the angle of the test-piece; in the meantime, the steel wire tensioning mechanisms are simple in structure, convenient to operate, not only are capable of overcoming the torque generated by centroid change in a test-piece ignition process, but also are applicable to length and angle change generated when the rotating cabin is installed in different angles.

The invention belongs to tower frame foundations supporting wind generating sets, and discloses a prestressed concrete tubular type wind generating set foundation. The prestressed concrete tubular type wind generating set foundation is characterized in that a foundation concrete cushion layer (8) is built on the bottom surface of a base structure bearing pit body with big end up, a tubular type concrete body (1) is arranged on the foundation concrete cushion layer (8), anchor bolts (3) penetrate through the inner portion of the tubular type concrete body (1) up and down, the upper ends of the anchor bolts (3) are connected with template rings (9), the lower ends of the anchor bolts (3) are fixed on bottom rings (4), bottom portion leveling foundation bolts (7) are arranged below the bottom rings (4), and the lower ends of the leveling foundation bolts (7) are connected with the foundation concrete cushion layer (8). The prestressed concrete tubular type wind generating set foundation is good in manufacturability and fast in construction, and aims to overcome the defects of the prior art and improve economic profit.