33results about How to "Avoid repeated installation" patented technology

An ultra-precise processing integrated platform for a large caliber optical mirror surface solves the problem that processing and detection are not integrated while processing the large caliber optical mirror surface in the conventional optical processing technical field. The platform integrates grinding, detection and milling for processing the large caliber optical mirror surface, and comprises a base, a horizontal moving device, a rotation device, an ultra-precise grinding device, a mirror surface detection device and a milling device, wherein the horizontal moving device drives the rotation device to move to a workpiece mounting position, a grinding position, a surface shape detection position and a milling position in a horizontal direction; a vertical moving device drives a spindle system and a diamond grinding wheel to move up and down in a vertical direction; the spindle system can adjust the inclined angle of the diamond grinding wheel; the diamond grinding wheel has a cambered surface; when in the workpiece mounting position, the rotation device can conduct cambered surface grinding on a workpiece; when in the surface shape detection position, the rotation device can conduct surface shape detection on the workpiece; when in the surface shape detection position, the rotation device can mill the workpiece.

The invention provides an apparatus and method for automatically improving terminal voltages of a low-voltage three-phase line. When first terminal voltages are not within a normal scope, a reactive compensation unit carries out compensation and acquires second terminal voltages and currents after the compensation, and if the second terminal voltages are still not within the normal scope and are greater than a voltage upper threshold and when the current imbalance degree is not within a normal scope, an implementation commutation switch implements commutation; when the second terminal voltages are smaller than a voltage lower threshold yet the current imbalance degree is within the normal scope, power transfer compensation is carried out; if the current imbalance degree is not within the normal scope, after the power transfer compensation is performed, third terminal voltages and currents are acquired; if the imbalance degree of the third terminal voltages is within the normal scope, commutation voltage regulation is stopped; and otherwise, the commutation switch implements the commutation.

The invention discloses a radial azimuth stepless adjustment for a gas drilling manifold, comprising a fixing sub, a fastener, a hanging flange and a rotating sub; the upper end of the rotating sub is in insertion connection and hermetic fit with the fixing sub, the lower end of the rotating sub is provided with an outlet connection end having predetermined fixing angle, the hanging flange sleeves the rotating sub, the fastener is positioned between the lower end of the fixing sub and the hanging flange, the rotating sub is hung to the fastener, the hanging flange is fixedly connected to the lower end of the fixing sub through a screw set, a roller bearing is disposed in an annular space between the fastener and the hanging flange, and a roller bearing is disposed between the fastener and the lower end of the fixing sub. The radial azimuth stepless adjustment enables the direction of a sand discharge line to be adjusted and enables the sand discharge line to be quickly connected out of a well site, repeated mounting and demounting is avoided, workload and work intensity are greatly reduced for workers, mounting period is shortened, worker cost and crane application expenditure are reduced.

The invention relates to the technical field of underground space construction, and discloses a pipe curtain construction method based on pipe banks. According to the pipe curtain construction method based on the pipe banks, the pipe banks are used as the construction unit and jacked at the same time for constructing a pipe curtain structure, each pipe bank is formed by arranging a set of steel pipes side by side, every two adjacent steel pipes are connected through a connecting component, and the number of the steel pipes in each set is not smaller than two. By adoption of the pipe curtain construction method based on the pipe banks, the construction efficiency is high, the jacking tendency can be controlled highly, jacking deviation can be rectified easily, and the construction precision is high.

The invention discloses a mobile tunnel supporting structure and a tunnel construction method implemented under the protection effect of the mobile tunnel supporting structure. The mobile supporting structure consists of a plurality of boxes which are connected to one another in a gripped manner according to the shape of the outer contour of a tunnel; a shield which extends rearwards is arranged at the tail of each box; and under the protection effect of the mobile supporting structure consisting of the boxes which are gripped to form a ring and the shields at the tails of the boxes, tunnel excavation and lining can be carried out safely and quickly. The tunnel construction method implemented under the protection effect of the mobile tunnel supporting structure mainly comprises the following steps of land preparation, assembly of the mobile supporting structure, mounting debugging of construction equipment, positioning of the mobile supporting structure and positioning of the equipment, tunnel excavation and assembly or primary supporting construction of prefabricated members. By the mobile supporting structure, slidable tunnel advance supporting can be implemented; and multi-ring tunnel advance supporting construction is not required under the condition of a complex formation, the equipment does not need to be detached or mounted repeatedly, cost is reduced, and the work efficiency is improved. Moreover, the construction method has high safety and high universality, and is convenient and easy to implement.

The invention discloses a gas drilling pipe collecting system capable of realizing universal adjustment of angle. The gas drilling pipe collecting system comprises a plurality of adjusting units, wherein the two adjacent adjusting units are connected through a hard pipeline; each adjusting unit comprises a stepless angle-varying mechanism; the stepless angle-varying mechanism is used for adjusting any angles within 360-degree scope along the pipe-collecting radial direction. The gas drilling pipe collecting system can be used for easily, conveniently and randomly adjusting the direction of the sand-draining pipeline, quickly connecting the sand-draining pipeline to the outer side of a well site, avoiding repeated mounting and dismounting, greatly reducing the workload and working strength of the worker, shortening the mounting period, saving the cost of the worker and the use cost of the crane and avoiding the serious consequences, including the stopping of the drilling machine, the prolonging of the drilling period, and the like.

The invention discloses a reservoir gate quick cutting and windowing device and a windowing method thereof. The reservoir gate quick cutting and windowing device comprises a cutter, a detonating device and a magnetic fixing device, and the detonating device and the magnetic fixing device are correspondingly installed on the cutter. According to the reservoir gate quick cutting and windowing device, the magnetic fixing device is adsorbed on a steel plate of the gate, after the cutter is detonated by the detonating device, concentrated energy metal jet is generated to cut through the steel plateof the gate, quick windowing of the reservoir gate is achieved, water outside the gate is conveniently guided through a diversion tunnel, thus the water pressure inside and outside the gate is balanced, the stuck gate can be lifted smoothly, according to the cutting and windowing device, the problem that an old reservoir gate cannot be lifted normally can be effectively solved, the construction difficulty is greatly lowered, the construction period is greatly shortened, meanwhile the hidden danger of personnel and mechanical equipment operation can be avoided, and the purpose of cutting and windowing the reservoir gate quickly is achieved.

Provided is a composite die for trimming and piercing of forgings. The composite die is used for synchronous machining of trimming and piercing of perforated forgings formed by forging. The composite die comprises a base; the base is provided with a fixedly-connected female die holder and a rotationally-connected piercing punch; the female die holder is detachably connected with a female die used for cutting off flashes of the outer walls of the perforated forgings; an elastic gasket is arranged below the base; a plurality of guide through holes are formed in the base; the elastic gasket is provided with an ejector rod in sliding connection with the guide through holes; the ejector rod is connected with a supporting plate, and the supporting plate can slide on the outer side of the piercing punch in the axis direction of the piercing punch and is used for supporting the perforated forgings; the female die is detachably connected with a scraper blade; and a trimming punch in sliding connection with the scraper blade is arranged above the female die. The composite die for trimming and piercing of the forgings reduces the manufacturing cost and improves the production efficiency.

The invention discloses a belt storage type crawler travelling conveyor and a travelling method thereof, and belongs to the field of belt conveyors. The conveyor comprises a machine head station, a transition section, a middle section, a belt storage section and a machine tail station, wherein the belt storage section comprises an automatic takeup device, bearing roller sets, belt storage sectionracks and a bend pulley; the automatic takeup device comprises a steel wire rope, takeup pulleys, takeup trolleys, a second rail, a takeup oil cylinder and a takeup winch; the takeup oil cylinder is fixedly connected with the takeup winch and the takeup trolleys through the steel wire rope; and a conveying belt sequentially passes through the machine head station, the transition section, the middle section, the bearing roller sets, the machine tail station, the bend pulley and the takeup rollers, and is connected with a conveying belt of the machine head station in an end-to-end mode. According to the belt storage type crawler travelling conveyor and the travelling method thereof, after the automatic takeup device is additionally arranged, only the takeup winch needs to be started and therequired conveying belt amount needs to be increased or reduced for extension or shortening of each time, so that the whole conveyor can extend or retract, and meanwhile, due to the adoption of a crawler chassis, the working efficiency of travelling of the conveyor is improved.

The invention relates to a stamping device, particularly to a rotary chamfering device for anchor plates. The device is mainly formed by combining a stamping device with a workbench, and the stamping device is a jack. By the aid of the device, multiple holes can be chamfered simultaneously by the aid of one action, a traditional chamfering method is changed, the production efficiency can be improved, meanwhile, repeated mounting and dismounting actions can be avoided, and the labor intensity of workers can be reduced to a certain extent.

The invention discloses a movable hammer type crushing station and relates to the technical field of construction machinery manufacturing. The movable hammer type crushing station comprises a hammer type crushing machine, a front conveying belt, a vibrating material feeding screen and a power box. The movable hammer type crushing station further comprises a car frame. The vibrating material feeding screen is arranged on one end of the car frame and the power box is arranged on the other end of the car frame. The hammer type crushing machine, located on the car frame, is arranged between the vibrating material feeding screen and the power box. The front conveying belt is arranged below an outlet of the hammer type crushing machine. A transfer hopper is arranged below the vibrating material feeding screen and a tail conveying belt is arranged at the outlet of the transfer hopper. A walking device is arranged at the lower end of the car frame and an electrical box used for receiving a remote control signal is arranged on one side of the car frame. According to the movable hammer type crushing station, the problems that the crushing station is high in infrastructure investment, big in occupied site, complicated in equipment installation and not capable of moving can be solved.

The invention relates to the technical field of medical cell cutting equipment, in particular to a diseased cell tissue excision device capable of finely adjusting the cutting area. The device comprises a fixed frame; an upper shell is vertically welded in the middle of the upper end surface of the fixed frame; and an extension rod is vertically welded downwards in the middle of the upper end surface of an inner cavity of the fixed frame. The device has the beneficial effects that by arranging multiple sets of circular ring cutting knives to be connected in a sleeved mode, repeated installation and disassembly of the knives are avoided, pollution to the knives is greatly reduced, meanwhile, quantitative adjustment is achieved, so that the cutting area is controlled, and research variablesare conveniently controlled; through cooperation of plug pins and threaded holes which are symmetrical longitudinally, adjustment of the position of an extrusion block is achieved, tissue cell cuttingis achieved through punching of a hydraulic cylinder, convenient adjustment of the cutting position is achieved, and the cutting efficiency is greatly improved; and meanwhile, through cooperation ofa camera and a display screen, real-time observation of the cutting position is achieved.

The invention discloses a mobile jaw crushing station, which relates to the technical field of engineering machinery manufacturing; it includes a jaw crusher, a front conveyor belt, a vibrating feeding screen and a power box, and the vibrating feeding screen is arranged at one end of the vehicle frame. The power box is arranged on the other end of the vehicle frame, and the jaw crusher is arranged between the vibrating feeding screen and the power box on the vehicle frame, and the outlet of the jaw crusher is The front conveyor belt is provided, an iron remover is provided above the front conveyor belt, a transfer hopper is provided below the vibrating feeding screen, and a tail conveyor belt is provided at the outlet of the transfer hopper. The lower end of the vehicle frame is provided with a running device; one side of the vehicle frame is provided with an electrical box for receiving remote control signals. The invention can solve the problems of large infrastructure investment, large site occupation, cumbersome equipment installation and immobility of the crushing station.

The invention discloses a mobile tunnel supporting structure and a tunnel construction method implemented under the protection effect of the mobile tunnel supporting structure. The mobile supporting structure consists of a plurality of boxes which are connected to one another in a gripped manner according to the shape of the outer contour of a tunnel; a shield which extends rearwards is arranged at the tail of each box; and under the protection effect of the mobile supporting structure consisting of the boxes which are gripped to form a ring and the shields at the tails of the boxes, tunnel excavation and lining can be carried out safely and quickly. The tunnel construction method implemented under the protection effect of the mobile tunnel supporting structure mainly comprises the following steps of land preparation, assembly of the mobile supporting structure, mounting debugging of construction equipment, positioning of the mobile supporting structure and positioning of the equipment, tunnel excavation and assembly or primary supporting construction of prefabricated members. By the mobile supporting structure, slidable tunnel advance supporting can be implemented; and multi-ring tunnel advance supporting construction is not required under the condition of a complex formation, the equipment does not need to be detached or mounted repeatedly, cost is reduced, and the work efficiency is improved. Moreover, the construction method has high safety and high universality, and is convenient and easy to implement.

The invention discloses a radial azimuth stepless adjustment for a gas drilling manifold, comprising a fixing sub, a fastener, a hanging flange and a rotating sub; the upper end of the rotating sub is in insertion connection and hermetic fit with the fixing sub, the lower end of the rotating sub is provided with an outlet connection end having predetermined fixing angle, the hanging flange sleeves the rotating sub, the fastener is positioned between the lower end of the fixing sub and the hanging flange, the rotating sub is hung to the fastener, the hanging flange is fixedly connected to the lower end of the fixing sub through a screw set, a roller bearing is disposed in an annular space between the fastener and the hanging flange, and a roller bearing is disposed between the fastener and the lower end of the fixing sub. The radial azimuth stepless adjustment enables the direction of a sand discharge line to be adjusted and enables the sand discharge line to be quickly connected out of a well site, repeated mounting and demounting is avoided, workload and work intensity are greatly reduced for workers, mounting period is shortened, worker cost and crane application expenditure are reduced.

The invention provides an apparatus and method for automatically improving terminal voltages of a low-voltage three-phase line. When first terminal voltages are not within a normal scope, a reactive compensation unit carries out compensation and acquires second terminal voltages and currents after the compensation, and if the second terminal voltages are still not within the normal scope and are greater than a voltage upper threshold and when the current imbalance degree is not within a normal scope, an implementation commutation switch implements commutation; when the second terminal voltages are smaller than a voltage lower threshold yet the current imbalance degree is within the normal scope, power transfer compensation is carried out; if the current imbalance degree is not within the normal scope, after the power transfer compensation is performed, third terminal voltages and currents are acquired; if the imbalance degree of the third terminal voltages is within the normal scope, commutation voltage regulation is stopped; and otherwise, the commutation switch implements the commutation.

The invention discloses a safety construction method for a hoistway elevator, a climbing frame and a construction elevator are arranged in a hoistway, and the construction method comprises the steps that a construction elevator assembly is transported into the hoistway, and a protection device is erected above a construction elevator installation area in the hoistway; a construction elevator is installed in the area below the protection device, and a climbing frame is synchronously constructed above the protection device; and after the construction elevator is assembled, the climbing frame is installed and the bottom of the climbing frame is closed, the supporting scaffolds, the horizontal steel beams and the protection devices are disassembled, and the protection structures on the truss structures provide safety protection for the construction elevator. According to the method, in the construction stage, synchronous construction of a construction elevator and a climbing frame can be guaranteed through an erected protection device; in the operation stage, safety protection is provided through a protection structure on the construction elevator, and the elevator car is prevented from being directly hit by falling objects. By means of the construction method, the problems that an existing safety protection device needs to be installed and dismantled repeatedly, so that procedures are complex, efficiency is low, and safety risks exist can be solved.

The invention relates to an adjustable air conditioner intelligent power-saving control device and its operation method, comprising a power-saving control device body and a device casing, the power-saving control device body is arranged in the device casing, and the power-saving control device There is a No. 1 fixed plate fixedly connected to the bottom plate of the body; in the present invention, by improving and optimizing the structure of the power-saving control device body, the improved fixed structure can be positioned in advance when installing the power-saving control device body. Then after the installation is completed, the position of the energy-saving control equipment body can be adjusted to ensure the accuracy of the installation of the energy-saving control equipment body. The optimized equipment can achieve the effect of convenient operation and energy saving during operation. Time-saving and labor-saving effects, and, through the setting of the device, repeated installation of the power-saving control device body can be avoided, thereby reducing damage to the device body and the casing, thereby prolonging the service life of the device.

The invention discloses a workpiece processing method is used for carrying out multi-procedure processing on a workpiece to be processed. The workpiece processing method comprises the following steps of: 1, providing a fixture and at least two processing racks; 2, installing the workpiece to be processed on the fixture; and 3, sequentially positioning the fixture provided with the workpiece on the at least two processing racks for respectively processing. By adopting the workpiece processing method, the working efficiency and the processing precision can be improved.

The invention discloses a quick-cutting and window-opening device for a reservoir gate and a window-opening method thereof. The quick-cutting and window-opening device for a reservoir gate includes a cutter, an explosion device and a magnetic fixing device, and both the initiation device and the magnetic fixing device are installed on the cutter . The rapid cutting and window opening device for the reservoir gate is adsorbed on the gate steel plate by the magnetic fixing device. After the cutter is detonated by the detonating device, the energy-gathering metal jet will be generated to cut through the gate steel plate, so as to realize the rapid opening of the reservoir gate, so as to remove the outside of the gate. The water is diverted by the diversion hole, so that the water pressure inside and outside the gate is balanced, and the stuck gate can be lifted smoothly. This cutting and opening device can effectively solve the problem that the old reservoir gate cannot be lifted normally, and greatly reduces the construction difficulty and construction period. At the same time, it can avoid the safety hazards of personnel and mechanical equipment operation, and realize the purpose of quickly cutting and opening the reservoir gate.

Provided is a composite die for trimming and piercing of forgings. The composite die is used for synchronous machining of trimming and piercing of perforated forgings formed by forging. The composite die comprises a base; the base is provided with a fixedly-connected female die holder and a rotationally-connected piercing punch; the female die holder is detachably connected with a female die used for cutting off flashes of the outer walls of the perforated forgings; an elastic gasket is arranged below the base; a plurality of guide through holes are formed in the base; the elastic gasket is provided with an ejector rod in sliding connection with the guide through holes; the ejector rod is connected with a supporting plate, and the supporting plate can slide on the outer side of the piercing punch in the axis direction of the piercing punch and is used for supporting the perforated forgings; the female die is detachably connected with a scraper blade; and a trimming punch in sliding connection with the scraper blade is arranged above the female die. The composite die for trimming and piercing of the forgings reduces the manufacturing cost and improves the production efficiency.

The invention discloses an assembling device and method for an oil seal of a casing of an automatic transmission. The assembling device comprises a sleeve, a guiding shaft, the oil seal and an adjusting nut; a thread is arranged on the circumferential surface of the bottom end of the sleeve; the adjusting nut is nested in the sleeve through threads; the top end of the guiding shaft extends into the sleeve from the bottom end of the sleeve; the diameter of the position, close to the bottom end, of the guiding shaft is larger than those of other positions of the guiding shaft; the oil seal is nested in the part, having the largest diameter, of the guiding shaft; and the top end of the oil seal fits the bottom end of the sleeve. According to the assembling device and method, the distance between the bottom end of the adjusting nut and the bottom end of the sleeve can be controlled and is the assembling depth of the oil seal, so that the moving distance of the oil seal is controlled, and the assembling depth of the oil seal can be controlled accurately; and the top end of the oil seal fits the bottom end of the sleeve, so that in the assembling process of the oil seal, the fitting surface is perpendicular to the axial direction all the time, slanting is avoided during assembling of the oil seal, and the assembling effect of the oil seal is guaranteed.

The invention relates to the technical field of correction instruments, and provides an adjustable all-directional embedded tooth traction device which comprises a bonding traction buckle, an elastic traction piece, a traction adjusting piece and a fixing support, one end of the elastic traction piece acts on the bonding traction buckle, the other end of the elastic traction piece acts on the traction adjusting piece, and the fixing support is fixed to the bonding traction buckle. The traction adjusting part is arranged on the fixing support, a traction point adjusting assembly is additionally arranged, the traction point adjusting assembly comprises a track disc, a positioning part and a locking part, the track disc is arranged on the bonding traction buckle, the positioning part is movably arranged on the track disc, the locking part is arranged on the positioning part, and the positioning part is movably arranged on the locking part. The end, close to the bonding traction buckle, of the elastic traction piece is connected with the positioning piece. According to the technical scheme, the problem that the traction point, the traction force and the traction direction are difficult to finely adjust when the embedded tooth is dragged in the prior art is solved.

The invention discloses a concealed type base and a television comprising same. The base comprises a base body, a stand column arranged on the base body, a sleeve, and a locating pin, wherein a locating hole is formed in the stand column; the sleeve is arranged on a back board; the stand column is inserted into the sleeve and moves up and down relative to the sleeve; a guide locating slot is formed in the sleeve; the guide locatingslot is provided with a first clamping position and a second clamping position; the locating pin passes through the guide locating slot, and is inserted into the locating hole; when the locating pin is positioned at the first clamping position, the base is concealed in the back board; and when the locating pin is positioned at the second clamping position, the base extends out of the back board. According to the concealed type base disclosed by the invention, the base can be concealedinto the back board, is pulled out by sliding while needed and is concealedwhile not needed, so that the problems that the materials are wasted and the cost is too high due to the fact that a production tool vertical machine is required to be used in the conventional technology are solved, and the base is prevented from being repeatedly mounted and stored; and moreover, the concealed type base is convenient to package and transport, and is neat and attractive in integral appearance.

Disclosed is a magnetic bearing stiffness testing device and method. The magnetic bearing stiffness testing device comprises a base, a two-dimensional motion platform, a force sensor support, a force sensor, a magnetic bearing rotor module, a magnetic bearing rotor mounting rack, a magnetic bearing stator module and a magnetic bearing stator mounting rack, wherein the force sensor can achieve zero adjustment through the force sensor support; through the two-dimensional motion platform, a rotor and a stator can generate relative displacement; a current source can set current inside a stator coil, and the force sensor can obtain the stress conditions between the stator and the rotor; according to the relation between stress and displacement as well as the relation between stress and current, the current stiffness and the displacement stiffness of a magnetic bearing can be obtained. The magnetic bearing stiffness testing device and method can solve the problem of stiffness measurement of high-load and high-stiffness magnetic bearings, achieve rapid and automatic measurement of the current stiffness and the displacement stiffness of the high-load and high-stiffness magnetic bearings and meet the requirement on mass production of products.

The invention discloses a movable hanger operating platform which structurally comprises a truss lower, two pairs of longitudinally symmetrical connecting rod parts are welded on the truss base plate in a transversely symmetrical mode, a monorail trolley is arranged at the upper end of each connecting rod part and forms a kinematic pair with the a repair rail at the bottom of the lower bridge face of a steel trussed beam, the length*width specification of the truss base plate is 16.5m*8m, riffled steel plates are laid on the top face of the truss base plate, and guardrails are arranged on the periphery of the top face of the truss base plate. The invention further discloses manufacturing, installing, using and removing methods of the movable hanger operating platform. The movable hanger operating platform has the advantages of being low in cost, easy to manufacture, convenient to operate and capable of being recycled, and not only overcoming a number of defects of the prior art and solving the problem that construction is inconvenient in an assembling process of the steel trussed beam, but also ensuring that no potential safety hazards of objects falling from high altitude exist and the ambient environment is not polluted, so that the technical purposes of being safe and reliable, reducing cost, shortening construction periods and improving efficiency are achieved.

The invention relates to the technical field of underground space construction, and discloses a pipe curtain construction method based on pipe banks. According to the pipe curtain construction method based on the pipe banks, the pipe banks are used as the construction unit and jacked at the same time for constructing a pipe curtain structure, each pipe bank is formed by arranging a set of steel pipes side by side, every two adjacent steel pipes are connected through a connecting component, and the number of the steel pipes in each set is not smaller than two. By adoption of the pipe curtain construction method based on the pipe banks, the construction efficiency is high, the jacking tendency can be controlled highly, jacking deviation can be rectified easily, and the construction precision is high.

The invention discloses an antenna panel assembling structure. The structure comprises a mounting base, an antenna panel body and a second vertical rod, the upper end of the mounting base is fixedly connected with the first vertical rod, the second vertical rod is arranged on the inner side of the first vertical rod, a fixing block is fixedly mounted at the rear end of the outer side of the secondvertical rod, the rear end of the fixing block is connected with a connecting disc, the rear end of the connecting disc is connected with a connecting rod, the lower end of the connecting rod is fixedly connected with a limiting block, a supporting block is fixedly installed on the outer side of the rear side of the first vertical rod, a connecting rod is installed on the outer side of the upperend of the second vertical rod, a spring is arranged on the outer side of the connecting rod, and a connecting block is installed at the top end of the second vertical rod. According to the antenna panel assembling structure, the stability of the antenna panel is enhanced, the signal receiving stability of the antenna during working is further improved, meanwhile, the height is convenient to adjust, the mounting accuracy is improved, repeated mounting and dismounting are avoided, and therefore the working efficiency is improved.

The invention relates to a form plate system of a prefabricated U-shaped beam and relates to the technical field of prefabricated beam form plates. The form plate system of the prefabricated U-shapedbeam comprises an outer from unit, an inner form unit erected over the outer form unit, and end forms arranged at the two ends of the outer form unit respectively. The outer form unit comprises a bottom form arranged on a pedestal and side forms arranged on the two sides of the bottom form respectively, and a movable bottom plate for opening and closing the bottom from is arranged at the part, where the middle section and the end sections of the U-shaped beam are connected, of the bottom form. One end of the movable bottom plate is hinged to the bottom form, the other end of the movable bottomplate is connected with the bottom from through bolts, movable side plates for opening and closing the side forms are arranged at the parts, located at the movable bottom plate, of the side forms, the upper ends of the movable side plates are hinged to the side forms, and the lower ends of the movable side plates are connected with movable side plates through bolts. The form plate system of the prefabricated U-shaped beam has the advantages of being convenient to operate, needless for removing the side forms and high in construction efficiency.

The invention discloses an automatic transmission housing oil seal assembly device and method, which comprises a sleeve, a guide shaft, an oil seal and an adjusting nut; the bottom peripheral surface of the sleeve is provided with threads, and the adjusting nut is nested on the sleeve through the threads; The top end of the shaft extends into the sleeve from the bottom end of the sleeve, and the diameter of the guide shaft near the bottom end is larger than the rest of the guide shaft; the oil seal is nested on the largest diameter part of the guide shaft, and the top end of the oil seal is attached to the bottom end of the sleeve. It can control the distance between the bottom end of the adjusting nut and the bottom end of the sleeve. This distance is the assembly depth of the oil seal, so that the moving distance of the oil seal can be controlled, and the assembly depth of the oil seal can be accurately controlled. Fitting setting, to ensure that the mating surface is always perpendicular to the axial direction during the oil seal assembly process, to ensure that the oil seal does not tilt during assembly, and to ensure the assembly effect of the oil seal.