230results about How to "Avoid position shift" patented technology

This invention provides a phased array testing device and method for fillet welds in pipe fittings, belonging to the field of non-destructive testing technology for pressure-bearing components. It can at least partially solve the problems in existing technologies such as difficulties in pre-treatment of fillet welds in confined spaces, inconsistencies in the positions of the pre-treatment zone and the testing zone, and unstable coupling in composite curvature regions. The invention includes: a shared motion platform with an installation interface at its front end, a guide component on one side, and a support component on the other side; a pre-treatment head and a testing head are respectively connected to the shared motion platform through the same installation interface. The pre-treatment head includes a grinding assembly and a limiting structure, and the testing head includes a phased array sensing unit and a coupling structure. By sharing the same installation interface and guiding reference, this invention achieves positional consistency between the pre-treatment zone and the testing zone, improving the feasibility and repeatability of in-service testing in confined spaces.

The utility model relates to the technical field of battery production and manufacturing, in particular to a turret mechanism and a winding device, and the turret mechanism comprises a rack, a roll changing unit, two supporting units and two bracket units. The roll changing unit is arranged on the rack and comprises a first turret structure and a second turret structure. The two supporting units are connected with the first turret structure and the second turret structure respectively, each supporting unit comprises a supporting plate, and each supporting plate is provided with a limiting terminal. The two support units are arranged on the rack, each support unit comprises a limiting piece, each limiting piece is provided with a limiting groove, and the limiting terminal enters the limiting groove to form limiting. The winding device comprises winding shafts and the turret mechanism, one end of each winding shaft is connected to the first turret structure, and the other end of each winding shaft is connected to the second turret structure. According to the turret mechanism and the winding device, the position deviation of the winding shaft can be avoided, normal production is guaranteed, and the production efficiency is improved.

The utility model provides a kind of push plate feeding mobile machine with feeding limiting structure, including feeding hopper, the bottom surface of the feeding hopper is fixedly connected with support seat, the side surface of the support seat is fixedly connected with support block, the upper surface of the support block is fixedly installed with electric cylinder, the telescopic end of the electric cylinder is fixedly installed with push plate assembly, the outer surface of the feeding hopper is fixedly connected with two limit slides, involve push plate feeding mobile machine field.The utility model is through the cooperation of limit slide and limit slide, limit switch, when push plate assembly reaches preset position, limit slide triggers limit switch, controller immediately controls electric cylinder to stop, ensure that material can be accurately pushed to feeding station each time, in addition to the feeding confusion problem that easily appears when multiple material stacks, the first flow baffle and second flow baffle of the structure can guide material to move stably upwards in pushing process, ensure the accuracy of feeding sequence.

The utility model discloses a base material conveying structure applied to a textile machine, which comprises a textile device, a base material storage rack is arranged on the rear side of the textile device, a swing rod assembly is arranged on the base material storage rack, a moving assembly capable of moving along the direction of the swing rod assembly is arranged on the swing rod assembly, and the base material storage rack is provided with a base material conveying mechanism. An adjusting assembly used for adjusting the position of the moving assembly is arranged on the swing rod assembly, an angle positioning structure used for fixing the angle of the swing rod assembly is arranged between the swing rod assembly and the base material storage frame, and two positioning roll shafts are arranged on the moving assembly at intervals. Through the innovative synergistic effect of the swing rod assembly and the moving assembly, accurate and flexible adjustment of the input direction of the base material is achieved, the stability after adjustment is ensured through a reliable positioning structure, and therefore the quality and efficiency of textile production are improved, and diversified textile process requirements are met.

This invention discloses a multi-zone controlled heating device for an electrode hot water boiler, relating to the field of electrode hot water boiler technology. It includes a partition and a synchronization assembly. A column is fixed to the top surface of the partition, and a fixing frame is mounted on the outer side of the column. Fixed shielding sleeves are fixedly connected to both ends of the fixing frame, and electrode columns are arranged inside the fixed shielding sleeves. An insulating sleeve is mounted on the top of each electrode column. The synchronization assembly is located in the middle of the partition and includes a protective cover. A protective cover is also mounted on the bottom of the partition. This invention uses a multi-level shielding structure composed of fixed and movable shielding sleeves to achieve graded shielding of the electrode columns. The spacing between the shielding structures increases progressively from bottom to top, gradually increasing the effective conductive exposure area of ​​the electrode columns along the water flow direction. This allows for gradual gradient heating of the electrolyte solution flowing from bottom to top, ensuring the water temperature rises steadily to the set temperature and significantly improving heating uniformity and efficiency.

This utility model discloses a lithium battery aluminum shell defect detection device, including a body; a hatch is movably connected to the front of the body; a data display is installed on the outer side of the body; a moving mechanism is fixedly connected to the inner cavity of the body. The moving mechanism includes a base plate, the bottom of which is fixedly connected to the inner cavity of the body, and a motor fixedly connected to the top of the base plate. A threaded rod is fixedly connected to the output end of the motor, a transmission screw block is sleeved on the surface of the threaded rod, a transmission slider is fixedly connected to the back of the transmission screw block, and a limit rail is slidably connected to the bottom of the transmission slider. This utility model, through the coordinated arrangement of the moving mechanism, clamping mechanism, and flipping mechanism, changes the traditional shell detection device's limitation of only being able to perform single-sided detection and requiring manual flipping, which affects detection efficiency. It can automatically flip to perform comprehensive detection of the shell surface, greatly improving overall work efficiency.

The utility model is suitable for network transformer processing technical field discloses a kind of network transformer disc dismantling device, second installation stand is uniformly had in both ends of installation platform side, two groups of second installation stand top side are between being provided with connecting crossbeam, and connecting crossbeam is set on installation platform outside upper side, and the side away from connecting crossbeam of installation platform is provided with self-made synchronous belt module, full material disc positioning mechanism is set in self-made synchronous belt module top, two groups of top side are provided with module mounting plate, and synchronous belt module is set in template mounting plate side, and installation platform top is provided with baffle material disc cylinder, two groups of second installation stand top are provided with second linear slide rail.The utility model technical scheme can realize the automatic feeding, positioning, disc changing and empty tray recycling of material tray, without manual intervention throughout, simultaneously, each actuating mechanism is controlled by control system to realize unified timing control, action is coherent without interference, degree of automation is high, improves disc dismantling efficiency.

The invention discloses an electric control box, and the box comprises a box body which is provided with a mounting groove; the control panel is mounted in the mounting groove, and the control panel comprises a main board body and a power device connected to the main board body; the radiator is in heat-conducting connection with the power device; and the insect-proof cover covers one side, back on to the radiator, of the power device, and an insect-proof space for accommodating the power device is defined between the insect-proof cover and the radiator. Through local sealing protection of the power device, comprehensive sealing of the whole electric control box is not needed, infestation of insects to core components is accurately blocked, and protection redundancy caused by integral sealing is avoided. In terms of heat dissipation efficiency, heat transfer loss is reduced through direct heat conduction connection of the radiator and the power device, meanwhile, heat exchange between the radiator and the outside is not affected by the layout of the insect-proof cover, and the heat dissipation effect is guaranteed; on the aspect of structural optimization, the overall sealing structure is simplified through the local protection design, the size of the electric control box is reduced, and the assembly complexity and the production cost are reduced.

This invention provides a rotor structure, a motor, and a compressor, belonging to the category of energy-saving electric motors. The rotor structure includes a shaft core, magnets, and a locking component. The magnets are mounted on the outer peripheral wall of the shaft core, and the locking component passes through the magnets and connects to the shaft core. The locking component has a first cooling channel extending axially, and the shaft core has a second cooling channel. One end of the first cooling channel communicates with the external environment, and the other end communicates with the second cooling channel. In this invention, the locking component simultaneously performs both fixing and cooling functions, achieving an integrated structural design and improving the heat dissipation effect of the magnets.

The utility model discloses a kind of anti-drop suspension type air filter cartridge, it is related to air filter cartridge technical field, including inner cylinder core, the one end of inner cylinder core is equipped with guide mechanism, the outside of inner cylinder core is equipped with outer cylinder body, the outside of outer cylinder body is equipped with anti-drop mechanism, anti-drop mechanism includes moving disc, in the utility model, by rotating rotary disc, rotary disc moves in the outside of outer cylinder body, moving disc and moving rod are driven to move, moving block and push rod move in turn, drive pressure member to rotate on fixed block, the other end of pressure member moves to press down fixed cover, so that inner cylinder core is positioned and installed in the inside of outer cylinder body, first sealing ring sleeve is connected outside outer cylinder body at this time, second sealing ring sleeve is connected in the inside of sealing groove, pressure member exerts pressure, so that fixed cover keeps close connection with outer cylinder body, prevent falling while improving sealing property, prevent the gap at connecting portion to affect filtration effect.

The utility model discloses an ecological floating island type water body purification device relates to water body purification field, including separate type floating platform, and the separate type floating platform is by central unit and a plurality of edge unit that surrounds distribution in the periphery of central unit is formed, and the middle position of central unit is equipped with the installation box, is equipped with telescopic drive system in the installation box, and telescopic drive system includes the drive motor that sets up in the installation box, and the output of drive motor is equipped with first rotary shaft, and the one end away from drive motor of first rotary shaft is equipped with transmission assembly, and transmission assembly is connected with the winding wheel, and the winding wheel is equipped with the rope, and the one end of rope is fixed in winding wheel, and the other end corresponds to connect each edge unit, and the separate type floating platform can be flexibly adjusted the distance of edge unit and central unit through the rope of telescopic drive system control, and the coverage area of floating island is expanded, and the purification range is improved.

The utility model relates to the technical field of metal part detection, and discloses a rapid detection tool for metal parts, which comprises a base, the left side and the right side of the top of the base are fixedly connected with stress rods, the top of each stress rod is provided with a top disc, and the top of each top disc is in threaded connection with a plurality of screws at equal intervals. The top disc is in threaded connection with the stress rod through the screw, a detected part is arranged on the inner side of the top disc, stress columns are fixedly connected to the periphery of the top of the detected part, and a first detection jig is arranged on the inner side of the detected part. According to the utility model, the insertion rod is taken to sequentially pass through the through hole and the insertion hole to fix the position of the fixing ring, so that the position offset of the detected part is prevented, and the first detection tool, the second detection tool and the third detection tool can be respectively taken to carry out different test work on the detected part. And parts to be detected with different sizes can be installed to carry out various detection work.

The invention belongs to the technical field of printing equipment, and particularly relates to ink-jet printing equipment which is characterized in that the ink-jet printing equipment comprises a stretching mechanism, a plurality of vertical frames are fixedly arranged at the bottom of the stretching mechanism, and the stretching mechanism is used for tensioning and stretching a printing stock for ink-jet printing; and the driving mechanisms are arranged on the two sides of the stretching mechanism, and the driving mechanisms are used for providing power for the action of the stretching mechanism and conveying, pressing and positioning the printing stock. The weights of structures such as side rod blocks are vertically downward, so that the surfaces of the deflection cylinders extrude a printing stock to be tensioned, the tension of a plurality of tension springs acts on a surrounding cylinder to drive the structures such as two groups of middle rods, the deflection cylinders, an inner surrounding disc and an outer surrounding disc to rotate by taking the axial direction of the middle rods as the center, the printing stock is tensioned on the surfaces of the four deflection cylinders, and the printing stock is tensioned on the surfaces of the four deflection cylinders. And the printing stock is tensioned through triple tension generated by multiple structures, so that the advantage of clear printing is achieved.

The utility model relates to the technical field of fishing gear processing, and discloses a fishing rod punching device for fishing gear production, which comprises a processing table, the top of the processing table is fixedly connected with a first motor, an output shaft of the first motor is fixedly connected with a first reciprocating screw rod, and the first reciprocating screw rod is in threaded connection with a sliding plate. A first mounting plate is slidably connected to the interior of the sliding plate, a hydraulic rod is fixedly connected to the bottom of the first mounting plate, a mounting block is fixedly connected to the output end of the hydraulic rod, a second motor is fixedly connected to the outer side of the mounting block, and a connecting block is fixedly connected to the outer side of the second motor. The fishing rod punching device for fishing gear production has the advantages that multiple positions of a fishing rod are punched at the same time, the punching efficiency is high, the situation that the punching precision is reduced due to position deviation caused by vibration during punching of the fishing rod is prevented, and chippings generated during punching are protected and blocked.

The flanging structure of the fin die comprises a die body, the die body comprises a lower die base and an upper die base, the bottom of the upper die base is fixedly connected with a male die fixing plate, the bottom of the male die fixing plate is detachably provided with a flanging male die through a bolt, the lower die base comprises a supporting base fixedly connected to the top of the lower die base, and the supporting base is fixedly connected to the top of the lower die base. A female die fixing plate is detachably arranged at the top of the supporting base through a bolt, a flanging female die matched with the flanging male die is arranged at the top of the female die fixing plate, and the flanging male die and the flanging female die are coaxial in center axis. According to the utility model, the height of the cushion column can be conveniently changed, so that the flanging height of a fin can be changed by the flanging structure of the die, the consistency of the flanging height is more easily ensured, the product quality is ensured, the position deviation of the fin in the machining process can be avoided, the machining stability of the fin is improved, and the production efficiency is improved. And the height of the cushion column can be conveniently and accurately adjusted, and the using effect is improved.

The utility model discloses a floor type live broadcast all-in-one machine which comprises a supporting box, a fixing hole, a supporting column, a sliding groove, a sliding rod, a locking assembly, an adjusting assembly, a supporting frame, a displayer and a lifting assembly, the fixing hole is formed in the upper end of the supporting box, the supporting column is rotationally connected to the middle of the lower end of the inner side of the supporting box, and the supporting column extends to the upper end of the supporting box through the fixing hole. A sliding groove is formed in the supporting column, the sliding rod is slidably connected into the sliding groove, the locking assembly is installed in the supporting box, the adjusting assembly is installed in the sliding groove, the supporting frame is installed at the upper end of the supporting column, the displayer is rotationally connected into the supporting frame, and the lifting assembly is installed on the side, close to the supporting frame, of the supporting column. The display device has the advantages that the supporting column is locked through the locking assembly, the direction of the display is accurately and stably locked, the direction of the display can be conveniently adjusted, and the live broadcast quality and the watching experience of audiences are improved.

The utility model relates to the technical field of pickup high cover production devices, and discloses a punch forming device for a pickup high cover, which comprises a base, a punch forming device and a punch forming device, the limiting structure comprises a first limiting part and a second limiting part, the first limiting part comprises a first fixed ring plate fixedly installed at the top of the base, the inner walls of the two sides of the first fixed ring plate are each provided with a set of holes, a first movable plate is arranged in each hole, and a first fixed plate is fixedly installed on the outer wall of one side of each first movable plate; a second fixing plate is fixedly mounted on the outer wall of one side of the first fixing plate, and a third fixing plate is fixedly mounted on the outer wall of one side of the second fixing plate; and the second limiting part comprises four sets of clamping rod grooves formed in the top of the first fixing ring plate, and a lower die is fixedly installed at the bottom of the inner side of the first fixing ring plate, so that the purpose of limiting and fixing the plate is achieved, the plate stamping stability is improved, the plate stamping forming quality is improved, plate position deviation is prevented, and the device using safety is improved.

The utility model belongs to the technical field of tunnel external connection type fan installation, and particularly relates to a tunnel internal and external connection type fan installation structure which comprises a fan body and a pre-buried plate pre-buried in a tunnel dome, and a plurality of studs are arranged on the two sides of the bottom of the pre-buried plate side by side. Mounting pieces used for mounting a fan body are arranged among the multiple studs on the same side, a T-shaped clamping groove is transversely formed in each mounting piece in a penetrating mode, and two T-shaped clamping blocks transversely clamped in the T-shaped clamping grooves on the same side are arranged on the fan body. According to the utility model, through the additionally arranged mounting pieces mounted on the studs and the T-shaped clamping grooves and the T-shaped clamping blocks which are matched with each other, when the fan body is mounted, the T-shaped clamping blocks are directly and transversely clamped in the T-shaped clamping grooves, so that the fan body is directly suspended and clamped on the two mounting pieces, and mounting personnel do not need to lift the fan body; and meanwhile, the position deviation of the fan body is avoided.

The mechanical trigger type safety protection mechanism of the low-speed juicer is characterized in that the mechanical trigger type safety protection mechanism of the low-speed juicer comprises a base, a working bin, a feeding bin and a protection cover, the base is provided with a driving mechanism, and the working bin is provided with a juicing tool bit; a switch rod and a microswitch are arranged at the end, close to the working bin, of the base, the working bin is provided with a first trigger rod, the feeding bin is provided with a second trigger rod, and the protective cover is provided with a trigger block. When the working bin is installed above the base, a gap exists between the first trigger rod and the switch rod, when the feeding bin is installed above the working bin, a gap exists between the second trigger rod and the first trigger rod, and when the protective cover, the feeding bin, the working bin and the base are installed in place, the driving mechanism is started to drive the juicing tool bit to work. The juicer has unique mechanical trigger logic, the juicing tool bit is started only when all parts are correctly installed and the protective cover is in place, accidental operation of the tool bit caused by misoperation is eradicated, and potential safety hazards are greatly reduced.

The utility model belongs to the technical field of building construction, and particularly relates to a double-layer reinforcement cage with a positioning function, which comprises a framework steel bar, and a reinforcing mechanism is welded on the side wall of the framework steel bar. The outer-ring stirrups and the inner-ring stirrups can enhance the punching resistance of the pile top and restrain the core concrete to improve the bearing capacity of a pile body, the double-layer stirrups act synergistically to resist water and soil pressure, local loads can be evenly dispersed to an overall framework, the anti-seismic and anti-impact capacity is improved, meanwhile, the core concrete is restrained by the inner ring, and the outer-layer concrete is restrained by the outer ring; the gradient constraint effect is formed, crack development is delayed, ductility is improved, the top fixing ribs can make the structure of the reinforcement cage more stable, and meanwhile a platform can be provided for follow-up equipment installation.

The utility model belongs to the field of shield machine, concretely relates to a kind of multi-blade staggered wear-resistant device of high-efficiency shield machine cutter, solve the current shield cutter in shield tunneling process, do not have the characteristics of multi-blade staggered, when facing uneven special geology, easy to appear cutter wear seriously, then cannot reach the effect of wear resistance, increase the problem of cutter cost when shield tunneling, including cutterhead, the front of the cutterhead is provided with a plurality of installation grooves, the inside of each installation groove is provided with mounting block, the side surface of each mounting block is provided with two first hob, the side surface of each mounting block away from each other is provided with second hob, the front of each mounting block is provided with third hob. By two first hobs, third hobs and the second hobs of side surface, can be staggered distribution, can disperse the cutting pressure that single hob bears, will make wear more uniform, improve the wear resistance of device.

The present application relates to the field of science and education display, and particularly relates to a display control method of a multi-axle three-dimensional dynamic pseudo-motion phenomenon display device, which comprises the following steps: S1, setting up a three-dimensional dynamic pseudo-motion phenomenon display device; S2, representing the pseudo-motion phenomenon effect of the display device by a control function G; S3, establishing a target function library, selecting the best function from the target function library, and obtaining the optimal solution of each coefficient in the control function G by using the least square method; S4, determining the rotation angular velocity range of the control function G; S5, combining the control function G to establish an input parameter database, constructing a machine learning control algorithm, and thus self-adjusting the associated parameters affecting the control function G. The present application can present the best display effect for different people in different environments.

The utility model discloses a tubular pile transfer trolley, and relates to the technical field of tubular pile production, the tubular pile transfer trolley comprises a supporting table used for placing tubular piles, the top of the supporting table is provided with a placing groove, and the two sides of a groove cavity of the placing groove are arranged in a penetrating mode. And a connecting rod is fixedly connected to the outer surface of the supporting table, a fixing ring is fixedly connected to the connecting rod, a movable baffle is arranged on the fixing ring, and the baffle is used for limiting the pipe pile. When the pipe pile is transported, the end of the pipe pile is shielded through the baffle, the effect of restraining the pipe pile is achieved, in this way, when two transport vehicles work cooperatively, the pipe pile can be prevented from sliding, and therefore the effect of protecting the pipe pile is achieved.

The application discloses a nerve probe, which comprises a needle handle, a probe part, a wire part and a plug. One end of the probe part is embedded in one end of the needle handle. One end of the wire part is electrically connected with the end of the probe part in the needle handle. The plug is electrically connected with the other end of the wire part. The wire arrangement device is connected to the other end of the needle handle, and the other end of the wire part can pass through the wire arrangement device. The first clamping groove is arranged in the needle handle, and the wire part is clamped in the first clamping groove. The wire part is clamped in the first clamping groove, the position of the wire part is fixed, the wire part is prevented from being stacked and bent in the needle handle, the wire arrangement device is arranged to support the wire part after the wire part leaves the needle handle, the wire part is prevented from being bent after leaving the needle handle, the problem that the electric signal is disconnected after the wire part is bent is prevented, and the stability and accuracy of the nerve probe are improved.

The present application discloses a kind of purification equipment with anti-blocking structure for sewage treatment, and it relates to the technical field of sewage treatment, comprising purification mechanism, conveying mechanism is installed on one side of the purification mechanism, the end of the conveying mechanism is provided with floating mechanism, the surface of the floating mechanism is installed with outer support mechanism, the inside of the floating mechanism is provided with pulse impurity removal mechanism.The purification equipment with anti-blocking structure for sewage treatment blocks large easily clogged impurities from entering the equipment, protecting the purification equipment from being clogged.The counterweight prevents the water suction cylinder from deviating and reduces the purification efficiency.The float can ensure that the water suction cylinder works within a certain depth.Large impurities and flocculent impurities are intercepted outside the equipment.The sand cone plate prevents sand particles from entering the equipment.The spiral groove and auxiliary rotating part accelerate the water suction speed.When impurities accumulate too much, the accumulated impurities are flushed out of the sieve groove by pulse flow.The sand cone plate vibrates to make sand particles fall off.

The application discloses a double-single-hook anti-bottom-hanging structure combined fish hook and bait, and relates to the technical field of fishing gear, comprising: a hanging ring, a first fish hook, a second fish hook and a detachable connecting sleeve; wherein the hook handle ends of the first fish hook and the second fish hook are movably connected in the hanging ring, the detachable connecting sleeve is movably sleeved between the hook handles of the first fish hook and the second fish hook, and is used for folding the hook heads of the first fish hook and the second fish hook to the outside of the middle part of the bait body. The application has low manufacturing cost, the combined fish hook can be connected with soft glue and hard plastic simulation baits of different styles, has strong universality, is easy to mass produce and popularize and apply, and comprehensively improves the use defects of the traditional simulation bait fish hook structure, and greatly improves the overall experience and fishing effect of the lure fishing.

This utility model discloses a testing device for biodegradable film production, relating to the field of film production technology. It includes a fixed base fixed to one end of a support base, and a movable base disposed on the upper side of the support base. A top seat is snapped onto the upper side of the movable base, and two sets of movable rods are threaded through the top seat. A lifting frame plate is fixed to the lower ends of the two sets of movable rods. A movable roller is movably connected to the inner side of the lifting frame plate. A threaded ring is threaded to the top of each movable rod, and a first spring is sleeved on the movable rod. A connecting rod is fixed to the middle of the upper side of the lifting frame plate, and a connecting tube is sleeved on the connecting rod. A pressure plate is fixed to the top of the connecting tube, and a pressure sensor is snapped onto the upper side of the pressure plate. The advantages of this utility model are: it replaces the single-function testing of existing equipment, realizing multiple testing functions for biodegradable films; the testing process is more convenient; and it can prevent film position shift during film winding and testing, ensuring the stability of the testing process.

The utility model discloses an electronic component laser marking machine relates to laser marking machine technical field, including work table, the middle position of work table top is installed with the installation box, and the side of installation box is slidably connected with laser marking assembly, the top side of work table below laser marking assembly is provided with the placing plate, and the inside of positioning hole is provided with the limiting mechanism for the auxiliary electronic component positioning placement, the limiting mechanism includes the limiting frame, and the limiting frame sets up in the surface of placing plate. The electronic component laser marking machine, through utilizing the "L" shape of limiting frame self, makes the side of electronic component can be with the corner of limiting frame inboard fit or positioning, thereby making the same batch electronic component in the process of processing, the position of self basically keeps same, thereby making the same marking position when using laser marking assembly to the surface of electronic component laser marking processing marks.

The utility model discloses a kind of lifting devices for double-column mixing machine, it is related to double-column mixing machine technical field, including left stand and lifting assembly, the left stand upper end is equipped with crossbeam, and right stand is provided with the right side of crossbeam lower end, the left stand inside is equipped with lifting assembly, and lifting assembly includes limiting installation groove, limit frame, servo motor, screw rod, movable sliding block and mounting block, the upper end of limiting installation groove inside is equipped with limit frame, and servo motor is installed in the middle of limit frame lower end, and servo motor front end is connected with screw rod, while movable sliding block is connected outside screw rod, movable sliding block outside is equipped with mounting block, the upper end of mounting block is equipped with rotating assembly. The lifting device for double-column mixing machine, the use height of material cylinder can be stably adjusted, avoid the position deviation of lifting device after long time use, improve the overall practicality and use efficiency of lifting device.