380 results about "Upward displacement" patented technology

The invention provides an adsorption module and a motion system, and relates to the technical field of precision equipment. The adsorption module comprises an adsorption substrate, a rotating base, a rotating shaft module, a wafer bearing table and a suction cup. The rotating base is fixedly connected with the adsorption substrate, and the rotating shaft module can rotate relative to the rotating base; the rotating shaft module can move in the axial direction of the rotating shaft module relative to the rotating base; the rotating shaft module is configured to be connected with the suction cup or the rotating base in an air pressure connection mode. The wafer bearing table is configured to be capable of adsorbing the suction cup or supporting the suction cup in an air floatation mode.

The invention particularly relates to a double-sealing special-shaped ball valve which comprises a valve body, a valve rod rotating and lifting operation mechanism movably installed at the top of the valve body and a connector arranged at the bottom end of the valve rod rotating and lifting operation mechanism. A notch is formed in the top of the special-shaped ball valve clack movably installed in the valve body and can be tensioned, a thin-layer slotting plate part is arranged at the bottom of the special-shaped ball valve clack, deformation is easier, a side through opening is formed in the middle of the special-shaped ball valve clack and used for switching rapid water passing, and therefore the whole structure is an inverted-C-shaped special-shaped ball, and the special-shaped ball valve has the high opening and contracting functions. The left side and the right side of the special-shaped ball valve clack shrink and deform towards the middle portion, the two inclined holes close the notch in the top of the special-shaped ball valve clack, so that the second sealing gasket is separated from the first sealing gasket, and at the moment, in the whole rotating opening and closing process of the valve, the second sealing gasket of the special-shaped ball valve clack and the first sealing gasket of the connecting pipe do not rub; the service life is long.

The invention provides a wafer back surface and edge detection device which comprises a base, and a rotary lifting module, a clamping lifting module, a motion direction conversion module and a visual detection module which are mounted on the base, the rotary lifting module comprises a rotary mechanism and a lifting mechanism; a supporting part for placing a wafer is arranged in the lifting mechanism, and the lifting mechanism is configured to jack the wafer up / down to a working position; the rotating mechanism is configured to provide a circumferential direction movement trend for the movement direction conversion module; the motion direction conversion module is arranged above the rotary lifting module and the clamping lifting module, and is driven by the clamping lifting module to realize displacement in the vertical direction, and the lifting motion of the clamping lifting module is converted into radial displacement of the motion direction conversion module; and the visual detection module comprises a camera unit, the camera unit faces the wafer, and the visual detection module is configured to perform image acquisition and detection on the wafer.

The invention relates to the technical field of bridge construction, and provides a construction method of a cable-stayed-continuous cooperative system composite beam bridge, which does not need to arrange a large batch of prestressed corrugated pipes and steel beams to ensure the use performance of a bridge deck slab, fully utilizes the structural characteristics of the cable-stayed-continuous cooperative system composite beam bridge, and improves the construction efficiency of the cable-stayed-continuous cooperative system composite beam bridge. By changing the overlapping sequence of the continuous composite beam bridge deck slabs, it is guaranteed that the bridge deck slabs in the hogging moment area of the continuous composite beam do not generate tensile stress, the bridge deck slabs in the sagging moment area generate pressure stress reserve, and by increasing the tension stay cable force, the continuous composite beam moves upwards close to a side main beam of the cable-stayed bridge and moves downwards close to a side span side main beam; the bridge deck slab generates compressive stress, the steel main beam generates tensile stress, the compressive property of concrete materials and the tensile property of steel are fully played, the material utilization rate is increased, the compressive pre-stress of the bridge deck slab is completed through internal force distribution of the composite beam, the construction method is simple and operable, the structural stress is clear, and the reasonability and safety of the structural stress are guaranteed.

The invention discloses a middle-speed gear broken tooth auxiliary guiding dismounting device, and particularly relates to the technical field of gear dismounting, the middle-speed gear broken tooth auxiliary guiding dismounting device comprises a base, positioning supporting assemblies are arranged at the two ends of the base, each positioning supporting assembly comprises a sliding frame arranged at one end of the base, and a vertically-adjustable reinforcing cover is arranged at one end of each sliding frame; the top and the bottom of the reinforcing cover are each provided with a first supporting piece. The mode that the reinforcing cover and the first supporting piece abut against the gear is matched with the base to drive all the structures to move upwards, the function that the gear vertically moves upwards is achieved, and the situation that the gear cannot be pulled out or is damaged due to friction between the gear and a rotating shaft due to uneven stress when the gear is disassembled can be effectively avoided.

The invention relates to the technical field of glass production detection devices, and discloses a processing device capable of accurately controlling glass thickness, the processing device comprises a conveying belt and a thickness detector, the conveying belt conveys a glass plate to a position below the thickness detector, a jumping part is arranged at the bottom of the thickness detector, and the jumping part can move according to different thicknesses of the glass plate. When the glass plate moves upwards, different displacement amounts are generated, the thicker the glass plate is, the larger the displacement amount of the jumping piece is, the jumping piece moves upwards, an elastic bag is arranged above the jumping piece, a liquid level pipe is arranged above the elastic bag, the elastic bag is filled with liquid, and when the jumping piece moves upwards, the elastic bag can be extruded, so that the liquid in the elastic bag flows to the liquid level pipe; the conveying belt is composed of a rolling roller and a rolling roller air bag, the rolling roller air bag wraps the outer side of the rolling roller and is driven by the rolling roller to rotate to drive the glass plate to move, an inflation device is arranged in the rolling roller air bag, and the amount of gas in the rolling roller air bag is kept unchanged.

The utility model relates to the technical field of fiberboard processing, and discloses a compression molding device for fiberboard production, which comprises a base, a bottom die is fixedly mounted on the upper surface of the base, an ejector plate is slidably connected in a die cavity of the bottom die, the outer surface of the ejector plate is attached to the inner wall of the die cavity of the bottom die, and a heating plate is embedded in the bottom wall of the die cavity of the bottom die. A pushing rod is fixedly installed on the lower surface of the ejector plate, the lower end of the pushing rod penetrates into the base in a sliding mode, a U-shaped seat is fixedly connected to the bottom wall of the base, a rotating plate is rotationally connected between two vertical plates of the U-shaped seat, the lower end of the pushing rod is hemispherical, and the lower end of the pushing rod makes contact with the upper surface of the rotating plate and slides. And a control mechanism is arranged on the base. According to the utility model, in the upward displacement process of the top die, the compression molded fiberboard in the bottom die can be automatically ejected out, so that the difficulty of taking out the fiberboard from the bottom die by a worker is reduced, and the processing efficiency of the fiberboard is improved.

The utility model provides a high-pressure pump drawing assembly convenient to use, and relates to the technical field of high-pressure pumps, the high-pressure pump drawing assembly comprises a drawing sleeve, the bottom of the drawing sleeve is in threaded connection with a threaded base, and a limiting assembly is arranged in the drawing sleeve; the limiting assembly comprises a second filtering plate, the first filtering plate is driven to move upwards by lifting a pull rod upwards, so that a clamping rod is pulled out of a clamping groove, at the moment, the first filtering plate is rotated according to needs, a first limiting hole or a second limiting hole is rotated to the position below a through hole, and the through hole is aligned with the first limiting hole or the second limiting hole; after alignment is completed, a pull rod is loosened, a first filter plate is driven to extrude downwards under the action of a first spring, so that the first filter plate and a second filter plate are overlapped, and through holes are rotated to positions above different limiting holes, so that the passing area of the through holes is changed, and impurities with different sizes are blocked as required; and the practicability of the device is improved.

The utility model relates to the technical field of stainless steel coil pipe straightening, in particular to a stainless steel coil pipe straightening machine which comprises a base, and a limiting groove is formed in the center of the top of the base. A first bevel gear rotates to drive a two-way threaded rod to rotate, so that two limiting plates are driven to relatively move outside the two-way threaded rod; the multiple sets of straightening rollers arranged outside are close to the two sides of the outer portion of the stainless steel coil pipe for straightening, and therefore the problem that traditional stainless steel coil pipe straightening equipment is not convenient to adjust according to stainless steel coil pipes of different sizes, and consequently the straightening effect is poor is effectively solved.

The invention relates to a wind power tower, in particular to a wind power tower cavity-free foundation prestress anchoring structure which is characterized in that a tower bottom foundation is connected with a barrel-shaped convex column which extends upwards and is provided with an upward barrel opening, and the convex column is inserted into a lower end pipe opening of a tubular tower body latticed column; the lower end of the prestressed cable bundle extends into a barrel cavity of the convex column from the tower top along a middle pipe cavity of the tower body latticed column, the lower end of the prestressed cable bundle is connected with a lower anchor ring, and a limiting mechanism for limiting upward displacement of the lower anchor ring is arranged in the barrel cavity of the convex column. Only an upper-layer foundation needs to be poured on the tower bottom foundation, arrangement of an operation cavity is omitted, the convex columns serve as prefabricated parts, when the tower body is built, the convex columns are fixedly arranged on the tower bottom foundation and are in insertion fit with the tower body latticed columns, and the lower anchor rings connected with the prestressed cable bundles are put down into cylindrical cavities of the convex columns and are limited through the limiting mechanisms. And the overall construction speed of the wind power tower is high, and meanwhile, the pouring work amount and the pouring cost of the tower bottom foundation are reduced.

The utility model relates to the field of constructional engineering, and particularly discloses a device for reducing the bubble generation rate of a concrete forming surface. The air guide pipe is reserved in the aluminum formwork, the air holes are formed in the periphery of the air guide pipe, when concrete is poured into the aluminum formwork in a layered mode, a vibrating rod is used for vibrating the concrete, and at the moment, part of air reserved in the concrete moves upwards and escapes; part of air flows into the air guide pipe from the air holes under the action of concrete pressure and the vibrating rod, air remaining in concrete is effectively helped to flow out quickly, bubbles are effectively prevented from being formed on the surface of a formed concrete structure by the remaining air, and the device is convenient in material taking, simple in use method, free of influence of the construction environment, simple in construction and low in cost. The construction efficiency can be effectively improved, the construction period is shortened, the air guide pipe can be repeatedly used, the bubble repairing cost in the later device decoration project period is fully reduced, the project cost is effectively reduced, and the project progress is accelerated.

The utility model discloses an inner cylinder segmented suspension type bearing sleeve chimney, which comprises an outer cylinder and at least one inner cylinder arranged in the outer cylinder, the outer cylinder and the inner cylinder are respectively formed by assembling a plurality of sections of cylinder bodies, and the bearing sleeve chimney also comprises a bearing suspender device arranged between the outer cylinder and the inner cylinder, and a connecting member for connecting the inner cylinder and the outer cylinder and supporting the inner cylinder on the outer cylinder, the bearing suspender device comprises a plurality of first suspender mechanisms used for fixedly connecting the corresponding barrel bodies of the inner barrel and the outer barrel. The second suspender mechanisms enable the inner cylinder to have upward displacement space relative to the corresponding cylinder body of the outer cylinder, and / or the third suspender mechanisms enable the inner cylinder to have downward displacement space relative to the corresponding cylinder body of the outer cylinder. According to the bearing sleeve chimney with the segmented suspension type inner barrel, the stability of the structure can be improved, and the production cost can be reduced.

The utility model provides a chemical raw material storage device convenient to transfer, and relates to the field of chemical equipment. The chemical raw material storage device convenient to transfer comprises a storage barrel, a moving seat used for assisting displacement is arranged at the bottom of the storage barrel, a grounding supporting mechanism used for abutting against the ground is connected to the bottom side of the storage barrel in a sleeving mode, and the grounding supporting mechanism comprises a grounding supporting seat and limiting supporting pieces arranged on the two sides of the storage barrel. According to the chemical raw material storage device convenient to transfer, through cooperative use of the storage barrel bottom moving seat and the grounding supporting mechanism, namely, through upward displacement adjustment of the storage barrel bottom grounding supporting mechanism, a worker can conveniently transfer the chemical raw materials under the condition that the whole storage device stored with the chemical raw materials does not need to be lifted up; and the movable seat is exposed at the bottom of the storage barrel for use, so that the storage barrel is assisted in short-distance displacement, the overall operation is safe and labor-saving, and the safety and convenience of the device in use are improved.

The utility model relates to a polishing pad trimmer and chemical mechanical polishing equipment, an adjusting assembly is arranged at one end of a swing arm, and the adjusting assembly comprises an airtight cavity; the trimming disc is arranged on the side, away from the swing arm, of the adjusting assembly. The adjusting assembly drives the finishing disc to move in the direction close to or away from the adjusting assembly through deformation of the airtight cavity. The pressure detection device is embedded in the airtight chamber and is used for detecting an internal gas pressure value of the airtight chamber; the controller is used for receiving the internal gas pressure value of the airtight cavity and controlling the working state of the grinding pad trimmer. The change condition of the dressing pressure of the dressing disc can be accurately measured in real time, the situation that the grinding pad is damaged due to the fact that the pressure is abnormal is avoided, wafer products are further prevented from being damaged, and the labor cost of detection is reduced.

A propulsor assembly of an electric aircraft is described. The propulsor assembly includes an electric motor, where the electric motor includes a stator and a rotor. The assembly further includes a propulsor mechanically connected to the rotor of the electric motor. The assembly also includes a cyclic control assembly including an electric actuator and a push rod, wherein the push rod is mechanically connected to the actuator and the propulsor, the push rod is configured to increase a blade angle of the propulsor when the push rod is displaced in a first direction, and the push rod is configured to decrease the blade angle of the propulsor when the push rod is displaced in a second direction.

The invention discloses a vibration relieving structure of a dry-type transformer, which relates to the technical field of transformers and comprises a transformer body and a bottom plate. The two ends of the steel cable are fixed and then arranged on the surfaces of the connecting bolts on the inner sides of the longitudinal beams in a sleeving mode, the middle of the steel cable penetrates through a hollow cavity of a bottom frame on the top of the transformer body, the transformer body is hoisted, part of weight is shared, and the burden of a lower buffering mechanism is relieved. In the whole process, the steel cable changes the path, the downward pressure is reduced, the first spring and the first damper stretch out and draw back to achieve a good vibration relieving effect, and the vibration relieving effect is achieved. And the service life of the lower damping mechanism and the use performance and service life of the dry-type transformer are improved.

The invention discloses a combined multi-brush grinding device for grinding a PCB (Printed Circuit Board), and relates to the technical field of PCBs. The device comprises an outer wrapping shell, a grinding brush roller is fixedly connected to the inner side face of the outer wrapping shell, and two notches are formed in the two sides of the outer wrapping shell. Through the arrangement of the pressing rod, the discharging inclined plate and other assemblies in the pressing protection device, the pressing rod conducts vertical reciprocating displacement, when the pressing rod moves to the top of a PCB, the pressing rod is pressed and fixed during work, and meanwhile, when the pressing rod moves upwards, after grinding is completed, the pressing rod is pressed and fixed to the top of the PCB. When the discharging inclined plate rotates anticlockwise to be close to the bottom of the conveying belt, the PCB falls onto the discharging inclined plate from the conveying belt through the other notch at the moment, the initial gravitational acceleration time when the PCB falls onto the discharging inclined plate is shortened in the pressing and fixing state and the discharging state in the working state, the gravity of the PCB falling onto the discharging inclined plate is reduced, and the working efficiency is improved. And the PCB is prevented from being damaged in the blanking process.

The utility model discloses a rubber plate printing machine, and relates to the technical field of printing machines. Comprising a conveying belt, a printing assembly arranged above the conveying belt and a material collecting device arranged at the discharging end of the conveying belt. The collecting device comprises a collecting box, a placing plate arranged in the collecting box in a sliding manner, and a plurality of springs arranged between the collecting box and the placing plate; by arranging the placing plate and a plurality of springs in the collecting box, the placing plate can be located at a higher position under the elastic action of the springs, so that the height difference between the discharging end of the conveying belt and the placing plate can be reduced, the falling height of the woven bag is reduced, the phenomena of bending, folding and the like of the woven bag in the falling process are effectively reduced, and the working efficiency of the woven bag is improved. Furthermore, the overlapping degree of the woven bags and the flatness of the woven bags are improved; in addition, due to the fact that the containing plate is arranged in the collecting box in a sliding mode, the containing plate can be limited, it is guaranteed that the containing plate moves in the vertical direction all the time, and the stability of vertical displacement of the containing plate is effectively improved.

The utility model discloses a field bridge trolley horizontal wheel detection device which comprises a detection inductor and a detection mechanism, the detection mechanism comprises an induction piece matched with the detection inductor, the induction piece is assembled on the upper portion of a vertically-arranged induction rod, the induction rod is assembled in a guide pipe, the guide pipe is vertically installed above a horizontal wheel of a field bridge trolley mechanism, and the detection inductor is arranged on the guide pipe. The bottom end of the induction rod extends out of the bottom end of the guide pipe, is located above the horizontal wheel and makes contact with the upper end face of the horizontal wheel. When the horizontal wheel mechanism moves up and down due to abrasion, the horizontal wheels can make contact with the bottoms of the induction rods, the induction rods move upwards, the position changes of the induction pieces are detected through the detection inductor, whether the horizontal wheels of the field bridge trolley mechanism break down or are damaged or not can be effectively judged, and the state of the horizontal wheels of the trolley mechanism is detected in real time; alarm can be triggered at the initial stage of damage of the horizontal wheels of the yard bridge trolley to remind equipment management personnel to replace the horizontal wheels in time and eliminate hidden dangers.

The utility model provides a leakproof dual-protection valve lock which comprises a valve body, two ends of the valve body are fixedly connected with connecting pipes, and the top of the valve body is rotatably connected with a switch. The utility model relates to a leakproof dual-protection valve lock, which records that in daily use, a valve body can be opened and closed through a switch, a dual-protection effect is achieved through rotary connection of a knob and the switch, and when a valve needs to be opened, a magnet needs to be placed in a groove firstly, and then the magnet is placed in the groove; at the moment, the trigger rod is attracted by the magnetic force of the magnet, the trigger rod moves upwards along the interior of the clamping groove until the trigger rod is clamped in the linkage hole, the trigger rod is located in the clamping groove and the linkage hole at the same time, and the switch can be controlled to be turned on and off by rotating the rotary knob at the moment. The valve body can be connected into a pipeline through the connecting pipes at the two ends, the sealing effect can be improved through the first sealing ring and the second sealing ring, and the leakage-proof effect is further achieved.

The utility model discloses a cooling bed conveying device, and relates to the technical field of cooling bed conveying. The device comprises a conveyor belt, wherein a fixing plate is arranged on the side surface of the conveyor belt; an adjusting device is arranged at the bottom of the conveying belt and comprises a motor, the motor is arranged at the bottom of the conveying belt, an output shaft of the motor is fixedly connected with threaded rods, the bottoms of the two threaded rods are rotationally connected with a fixing block, and the side face of the fixing block is fixedly connected with a fixing frame. And the circumferential surface of the threaded rod is in threaded connection with a threaded block. The force for driving the threaded rod to rotate through the motor is matched with the supporting rod, the supporting frame, the fixing frame and other assemblies in the adjusting device, the effect that the supporting frame moves upwards to drive the conveying belt to move upwards is achieved, the effect of adjusting the height of the conveying belt is achieved, and the height of the conveying belt can be adjusted at any time according to needs; therefore, different working environments and operation requirements can be met.

The utility model discloses a stamping device for processing a connecting piece, which comprises a working table, an adjusting mechanism is mounted on the working table, a support frame is mounted on the adjusting mechanism, a fixing mechanism is mounted on the support frame, a lower stamping die is mounted on the upper surface of the working table, and a stamping die is mounted on the lower surface of the working table. A stamping support is fixedly connected to one side of the working table, and a stamping mechanism is installed on the stamping support. According to the stamping device for machining the connecting piece, when the connecting piece is stamped, the second electric push rod drives the upper stamping die on the mounting plate to move downwards, the connecting piece is stamped, after stamping is completed, the upper stamping die is withdrawn, the stamping die plate is pushed by the reset spring to move upwards on the sliding rail, and then the connecting piece is stamped. And therefore, the connecting piece can be taken, the operation is simple, and the use is convenient.

The application discloses a continuous evaporator and a working method thereof, relates to the technical field of evaporators, and comprises a primary evaporator, a body, an auxiliary component and a matching component, the primary evaporator is communicated with the body through a conveying pipe, a heater is arranged on the primary evaporator, a fixed plate is fixedly connected to the inner wall of the body, a base is fixedly connected to the bottom surface of the body, the auxiliary component is arranged in the body and comprises four auxiliary blocks, intermittent vibration of the four auxiliary blocks is generated through the arrangement of the auxiliary component, the matching component is drivingly connected to the auxiliary component and comprises a displacement plate slidingly connected to the inner wall of the body, the displacement plate is reciprocatingly displaced in the vertical direction and has the features of slow upward displacement and rapid downward displacement through the arrangement of the matching component, and the auxiliary component comprises a main shaft; through mutual cooperation between the above-mentioned structures, the application has the effects of improving overall evaporation efficiency, shortening the time required for boiling of the secondary evaporator and reducing the energy consumption demand.

The invention discloses a high-adaptability elevator car body welding jig which is applied to the related technical field of welding jigs and can simplify the dismounting and mounting process of a limiting assembly, so that the mounting position of the limiting assembly can be quickly changed according to the size and shape of an elevator car part needing to be welded, and the welding efficiency is improved. The problem that in the prior art, a welding jig is difficult to adapt to welding of different parts of lift cars of different sizes is solved, in the process of installing a limiting assembly, by rotating a pre-lifting cushion block, the end cushion block can be driven to move upwards through inclined face matching between a lifting piece and the end cushion block, tight abutting between a jig platform and a bearing strip is achieved, and the welding quality is improved. Therefore, rapid locking of the limiting assembly is completed. Besides, in the welding process, the limiting stability of the limiting assembly on the lift car component can be monitored, so that abnormal deviation or looseness can be found in time, welding under the condition of unstable limiting is effectively avoided, the welding precision of the lift car is effectively guaranteed, and the defective rate is reduced.

The utility model relates to the technical field of bearing production, and discloses a suction device for bearing steel balls, which comprises a support and a getter pump arranged on the rear side of the support. The length of a sliding groove on the right side of a storage box can be changed when the sliding groove moves left and right, and at the moment, the number of the steel balls discharged into the sliding groove can be controlled; therefore, after the second telescopic column extends, the air suction piece moves downwards, an air suction disc of the air suction piece sucks the steel balls after the air suction pump operates, then the second telescopic column retracts to drive the steel balls to move upwards, and then the first telescopic column extends to suck the steel balls. Therefore, the number of the discharged steel balls can be controlled by simply pushing and pulling the sliding groove, the suction number of the steel balls is further controlled, the suction device for the bearing steel balls can suck the specific number of steel balls so as to be matched with other devices for use, the structure is simple, operation is convenient, later overhaul and maintenance are simple, and the production efficiency is high. And the suction device for the bearing steel balls is convenient to use.

The invention discloses a logistics transportation carrying device for large express delivery. The logistics transportation carrying device comprises a device body and a connecting assembly arranged on the device body. The abutting block pulled downwards moves downwards and moves to the bottom of the clamping block, the compressed limiting spring pushes the connected clamping block to move towards the inner side, upward deviation of the abutting block is limited, a connecting plate arranged on the outer wall of a fixing rod fixedly connected to the outer wall of the bearing plate in a sleeving mode is rotated, and an inserting block fixedly connected to the inner side of the connecting plate is driven to move; a compression spring connected to the outer wall of the fixing rod in a sleeving mode is further compressed, a rectangular block fixedly connected to the outer end of the limiting rod is provided with a limiting hole, the pulled insertion block is pushed inwards under the action of the compressed compression spring, the moving insertion block slides into a nickel coin in the limiting hole of the rectangular block, and a clamping block connected to the inner side of the limiting rod is limited. The supporting springs connected to the outer walls of the supporting rods in a sleeving mode are compressed in a high-strength mode, supported goods can have a great buffering effect, and large-amplitude collision is effectively avoided.

The utility model relates to the field of footwear production, especially bottom pull rod jump inner benevolence forming die, including lower mould, still including pull rod and fixing piece, the upper end swingly provided with upper mould of lower mould, the upper end of lower mould is equipped with two bottom mould, the upper end of lower mould is equipped with the flow groove, two bottom moulds are connected through the flow groove and are mutually penetrated, the inner wall right -hand member of flow groove is equipped with the insertion groove, the left -hand member of flow groove is equipped with the sliding slot and is penetrated, the pull rod is slidly arranged in the sliding slot. The utility model discloses by pushing pull rod and makes its right -hand member carry the flow groove and inserts into insertion groove, when the upper mould and the intermediate mould are displaced upward, the structure of the material expansion on the bottom mould is used to drag the intermediate mould to move upward and is inserted into the insertion groove, and the series of operations of the intermediate mould is rotated with the hole inclined piece slope downward small angle, solve the problem that the shoe is difficult to complete stripping from the inner benevolence intermediate mould after forming, realize the smooth stripping of shoes.

The invention discloses a slip form blade foot and method for applying prepressing strain to well wall cast-in-place concrete.The slip form blade foot is of an annular structure and comprises a plurality of blade foot block structures connected end to end, and each blade foot block structure comprises a blade foot block body, a vertical displacement generating device, a displacement sensor and a limiting plate; the vertical displacement generating device is arranged between the lower plate and the cambered surface plate and used for driving the cambered surface plate to move in the vertical direction. The displacement sensor is arranged at the telescopic end of the vertical displacement generating device; the device is suitable for the vertical shaft wall constructed through the top-down and short-digging and short-building technology, the cast-in-place concrete can be extruded by applying upward displacement to the cambered surface plate, pre-pressing strain can be rapidly and accurately applied to the cast-in-place concrete of the shaft wall, and the construction efficiency is improved. The compactness of cast-in-place concrete and continuous cast-in-place concrete in the well wall section is improved, and the overall water sealing performance of the well wall is remarkably improved.

The utility model relates to the field of machine tool clamps, in particular to a numerical control machine tool pneumatic clamp which comprises a positioning block, an expansion block and a chuck of an ok clamp, the positioning block is fixedly connected with a machine tool sliding table, the expansion block is vertically and slidably connected with the positioning block, and the chuck is slidably connected to the inner inclined face of the side, away from the positioning block, of the expansion block. Grooves are upwards formed in the bottom edges of the two sides of the chuck, cushion blocks movably abut against the grooves, and supports movably abut against the bottom ends of the cushion blocks. The clamping head can move in the horizontal direction and the vertical direction, after the clamping head abuts against the side edge of a workpiece, when the expansion block is pressed downwards, the clamping head can extrude the side wall of the workpiece to provide clamping force, meanwhile, the edge of the workpiece is pressed downwards, and the edge warping phenomenon caused by the side clamping force of the workpiece is avoided; according to the device, the original advantage of small size of an ok clamp can be kept, and meanwhile, the stable side clamping characteristic of the frog clamp is also realized.

Provided in the present application is a laser level, comprising an outer cover assembly and an inner housing assembly supported inside the outer cover assembly by means of a spacer made of an elastically deformable material, wherein the spacer comprises a first spacer which is compressed when the outer cover assembly is displaced upwards relative to the inner housing assembly, and a second spacer which is compressed when the outer cover assembly is displaced downwards relative to the inner housing assembly; in a z direction, the first spacer and the second spacer are arranged along an outer periphery of the inner housing assembly and are offset outwardly from a damping device of a pendulum assembly; each spacer comprises a z-direction inner surface and a z-direction outer surface which are opposite to each other in the z direction, and the inner housing assembly and the outer cover assembly respectively comprise a z-direction outward surface and a z-direction inward surface which are configured to come into contact with the z-direction inner surface and the z-direction outward surface, and the outer cover assembly and the inner housing assembly comprise matching upward stop features, such that a displacement distance is prevented from being further increased when an upward displacement distance of the outer cover assembly relative to the inner housing assembly in the z direction reaches a preset value.