563results about "Threaded caps application" patented technology

Disclosed is a method of fastening a cap of a container, the method including: specifying a screw thread engagement point of a cap and a neck ring of a container; and aligning the engagement point with a fastening start position of the cap and fastening the cap to the neck ring, in which the specifying of the engagement point includes detecting the engagement point by rotating the cap in a reverse direction in a state where the cap is seated on the neck ring.

The utility model relates to the technical field of nail polish, and discloses a nail polish bottle cap screwing device which comprises a base, a mounting groove and a mounting plate. By arranging the base, the mounting groove, the mounting plate, the hydraulic rod, the fixing device, the rotating mechanism, the clamping mechanism and the vertical rod, firstly, a bottle body is mounted on the fixing mechanism, the fixing device is opened, a top transmission wheel drives a lead screw to rotate, the lead screw drives the fixing plate to move through threaded connection, and the bottle body is fixed through the fixing plate; a bottle cap is installed on a clamping mechanism, the bottle cap is clamped through a moving plate, a rotating mechanism is opened, a front side gear drives a transmission frame to rotate, the transmission frame drives the bottle cap to rotate, a hydraulic rod is opened, the hydraulic rod drives the bottle cap to move, and the bottle cap is screwed to a bottle body. And when the bottle cap is manually screwed for a long time, hands are tired, so that the production efficiency is reduced.

The sewage sampling device comprises a bearing seat, a plurality of test bottles and a sampling module, the plurality of test bottles are arranged on the bearing seat at intervals, each test bottle comprises a bottle body and a bottle cap, the bottle cap is rotatably mounted on the bottle body through a rotary pin and used for opening / closing the bottle body, and the bottle cap extends outwards relative to the bottle body and forms a groove plate; the sampling module comprises a manipulator, a wedge edge rod and a suction pipe, the wedge edge rod and the suction pipe are arranged in parallel and are respectively connected to the manipulator, the wedge edge rod vertically extends downwards relative to the suction pipe and forms a pushing part, and the pushing part is matched with the groove plate; when the manipulator simultaneously drives the wedge edge rod and the suction tube to vertically move downwards, the wedge edge rod can push the groove plate through the pushing part so as to drive the bottle cap to open the bottle body; the straw can be inserted into the bottle body in the opened state. Therefore, bending deformation of the suction pipe is effectively avoided, the bottle cap is driven to reset through the rotary pin, automatic closing of the bottle cap after sampling can be achieved, and the lasting sealing performance of a test bottle is guaranteed.

The invention relates to a sterile filling system for beverage production and a filling process, and relates to the technical field of beverage production, the sterile filling system comprises a processing table, a sterile production mechanism, a transportation mechanism, a filling mechanism, a bottle dividing star wheel mechanism and an antifouling pad, and the sterile production mechanism comprises four L-shaped plates lapped at the top of the antifouling pad. By arranging the sterile production mechanism, the top plate can be fixed to the top of the machining table through an L-shaped plate and screws, a check curtain naturally falls to form a closed space, a filling area is isolated from the outside, and then an ultraviolet sterilization lamp on the top of the top plate continuously irradiates to sterilize air on the inner side of the check curtain, the equipment surface and a container to be filled; and meanwhile, the purposes of forming a continuous sterile filling environment and reducing the microbial pollution risk are achieved through the matching structure of the check curtain and the ultraviolet sterilization lamp, and the effects that the check curtain and the top plate are convenient to clean regularly and the long-term sterile state is maintained are achieved through the detachable design of the L-shaped plate.

The invention belongs to the technical field of automatic production of products, and particularly relates to a powder-liquid fresh-locking double-cabin integrated sterile preparation process, which integrates independent powder preparation, liquid preparation and final assembly steps into a three-line parallel collaborative production process, realizes seamless connection and efficient synchronization among the procedures, and improves the production efficiency. Efficiency loss and pollution risks caused by raw material transfer and waiting in traditional sectional production are avoided; according to the method, a mode of powder-liquid separation treatment, filling and final assembly is adopted, and sensitive active components in powder are effectively protected from being damaged in the liquid preparation process, so that the efficacy and the stability of a final product are fundamentally guaranteed, and meanwhile, the overall automation level and the reliability of production quality control are improved.

A capping and de-capping apparatus for capping and de-capping tubes disposed in a tube holding rack having a two-dimensional array of apertures for holding the tubes. The apparatus comprises a rack support for supporting the tube holding rack, a head unit adapted for carrying a cartridge comprising at least one capping and de-capping gripper, a drive system for moving the rack support and the head unit relatively towards and away from one another, in order to cause engagement or disengagement of the capping and de-capping gripper with or from a cap of at least one tube, and a drive system for rotating the capping and de-capping gripper, wherein rotation in one direction causes attachment of the cap to the tube and rotation in the opposite direction causes detachment of the cap from said tube.

The multi-specification automatic cap screwing device comprises a fixed frame, a three-section type fixed clamping module is arranged at the bottom of the fixed frame, an automatic lifting cap screwing module is further arranged on the fixed frame, and a control system in communication connection with the three-section type fixed clamping module and the automatic lifting cap screwing module is installed on the fixed frame; the three-section type fixed clamping module comprises three-section type arc-shaped clamping jaws, each three-section type arc-shaped clamping jaw is composed of an upper-section clamping unit, a middle-section clamping unit and a lower-section clamping unit, each clamping unit comprises a pair of arc-shaped clamping jaws driven by a servo electric cylinder, and the servo electric cylinders drive the arc-shaped clamping jaws to execute opening and closing actions through servo electric cylinder push rods output by the servo electric cylinders; and the automatic lifting cap screwing module comprises an automatic cap screwing device and a lifting driving mechanism for driving the automatic cap screwing device to do lifting motion. Through three-section type self-adaptive clamping and torque control, laser positioning and cap screwing torque closed-loop control and in combination with deep cooperation of the mechanical arm, high-precision and high-efficiency whole-course automatic cap screwing is achieved.

The utility model discloses a kind of multiple non-matrix automatic cap screwing workstations for cryopreservation tube, including bottom installation component, support component is provided on bottom installation component, support component top end is provided with top installation component, top installation component is provided with outer transmission component, first moving nut, second moving nut are provided on outer transmission component, first moving nut is provided with first moving plate, first moving plate is provided with a plurality of first installation hole, inner screwing transmission component is provided in first installation hole, second moving nut is provided with second moving plate, second moving plate is provided with a plurality of second installation hole, moving guide rail is provided on bottom installation component, feeding moving plate is provided on moving guide rail, feeding moving plate is provided with cryopreservation tube storage component, use this automatic cap screwing workstation, realize the automatic screwing cover and unscrewing cover operation to batch cryopreservation tube, effectively improve the operation efficiency that cover is screwed or unscrewed.

The invention discloses filling and cooling equipment for protein beverage production, and relates to the field of protein beverage production.The filling and cooling equipment comprises a base and a conveying frame, a plurality of sets of filling heads are arranged at the bottom of a charging barrel in a surrounding mode, a containing disc is arranged at the top of an electric sliding disc in a sliding mode, and the conveying frame and the charging barrel rotate synchronously; clamping plates are symmetrically arranged on the top of the containing disc in a sliding mode, a special-shaped sliding groove is formed in the position, located on one side of the cap screwing assembly, of the conveying frame, and a guide column matched with the special-shaped sliding groove is arranged at the bottom of the containing disc. The charging barrel is matched with the conveying frame to synchronously rotate, filling work is carried out while conveying is carried out, under the action of a special-shaped sliding groove, at the moment, a fixed gear slides down along with a guide column, the fixed gear drives a containing disc on the top to rotate, and when cooling water is sprayed out through a cooling assembly, the cooling effect is good. Therefore, the sterile container is in full contact with cooling water for cooling, and large temperature difference in the sterile container is effectively reduced.

The present application relates to the technical field of sample pretreatment automation, and discloses a system of a full-automatic sampling tube cap screwing and pipetting workstation and a running method thereof.The system comprises a motion point definition module, a cap screwing adaptation identification module, a label scanning module, a pipetting planning and execution module, a cap screwing torque calling module and a real-time torque acquisition module.The system realizes continuous scanning and reliable identification of the cap profile in the motion state through a dynamic coordinate system and key motion points, dynamically calls matched torque parameters to execute cap screwing according to the identification result, and simultaneously acquires real-time torque data.The system synchronously completes sample label information analysis, pipetting path planning and pressure monitoring.The scheme realizes adaptive perception and closed-loop cap screwing control of the cap state, and improves the robustness of cap identification, the consistency of cap screwing action and the reliability of the overall process.

Closure devices and kits allow closure of an open-ended container and provide a visible indication of closure torque. The closure device will include an outer cap defining a torque indicator window, an inner cap nested within the outer cap and a torque indicator disc positionally fixed to an upper surface of the inner cap and having at least two different indicia regions angularly adjacent to one another. The outer and inner caps are in mechanical interference fit with one another such that turning movement applied to the closure device allows the outer and inner caps to be turned as a unit and threadably coupled onto a threaded container until the inner cap is frictionally engaged with an edge of the container. Thereafter, continued turning movement of the outer cap relative to the inner cap causes angular displacement of the indicator window relative to the torque indicator to thereby provide a visible indication through the indicator window of an indicia region indicative of sufficient closure torque.

The invention provides automatic powder filling equipment. The automatic powder filling equipment comprises a rack; the conveying belt is used for conveying bottles to be filled and filled bottles; the turntable mechanism is used for positioning the bottles one by one and sequentially conveying the bottles to filling, plug hanging, cap screwing and capping stations; the filling mechanism is used for quantitatively filling the powder into a bottle; the cover hanging mechanism is used for vibrating and conveying the outer cover from the hopper to a cover hanging position; the cap screwing mechanism is used for pressing and screwing the outer cap hung at the bottle opening; and the control mechanism comprises a PLC (Programmable Logic Controller) and a touch screen. Through centralized control of the PLC and the touch screen, full-automatic line production from bottle feeding, filling, cap hanging, cap screwing and bottle discharging is achieved, manual intervention is reduced, and the production efficiency is remarkably improved. The rotary table mechanism is adopted for carrying out single-station accurate positioning and conveying on bottles, the problem that positioning on a traditional conveying belt is not accurate is solved, the accuracy of procedures such as filling, cap hanging and cap screwing is ensured, and the product percent of pass and the stability of equipment operation are improved.

The invention discloses a beverage filling production line, and particularly relates to the technical field of beverage production, the beverage filling production line comprises a conveying part, the conveying part comprises two conveying side frames, a conveying roller is rotatably mounted between the conveying side frames, and the outer side of the conveying roller is movably sleeved with a conveying belt; the beverage filling production line comprises a conveying side frame, a plurality of installation supports are fixedly installed at the top end of the conveying side frame, limiting side plates are fixedly installed on the installation supports, a plurality of filling bottles are arranged between the limiting side plates and placed on the upper surface of a conveying belt, and a filling assembly is fixedly installed at the top end of the conveying side frame. Through the arrangement of the filling assembly, automatic beverage filling operation can be conducted on a set of filling bottles, the beverage filling efficiency is improved, the protection part is used in cooperation to prevent beverage liquid from dripping on the conveyed filling bottles or the conveying part to cause pollution, follow-up cleaning is reduced, and therefore the overall beverage filling efficiency is improved.

This invention discloses a miniature canning and conveying device, comprising a conveying assembly, a capping assembly, a cap transfer assembly, a guardrail assembly, a filling assembly, and a sterilization assembly mounted on a substrate. The conveying assembly has an inlet end, an inlet conveying end, an outlet conveying end, and an outlet end, with the inlet and outlet conveying ends conveying in opposite directions. The capping assembly is positioned above the inlet and outlet conveying ends. The cap transfer assembly is positioned between the inlet and outlet conveying ends. The guardrail assembly is laid between the inlet and outlet conveying ends, forming a filling and inoculation station, a sterilization station, and a channel. The filling and sterilization assemblies are respectively positioned at the filling and inoculation stations and the sterilization station. The guardrail assembly includes a bottle pushing component. This invention enables the filling and inoculation of the medicine inside the isolator from outside the isolator, preventing contamination of the internal environment of the isolator and leaks due to manual operation.

The invention belongs to the technical field of photoresist sub-packaging, and discloses photoresist automatic canning equipment which comprises an equipment body, a roller line module, a cover opening and locking module, a filling module and an air return system, the equipment body adopts closed design, and a cover opening and locking area and a filling area are arranged in the equipment body; the roller line module extends to the equipment main body to be arranged, passes through the cover opening and locking area and the filling area, and is used for bearing and conveying a photoresist container; the cover opening and locking module is arranged in the cover opening and locking area and is used for opening and taking away a cover body of the photoresist container or installing and locking the cover body of the photoresist container; the filling module is arranged in the filling area and is used for injecting a set volume of photoetching liquid into the photoresist container; the air return system is used for forming a clean air flow field in the equipment body, and the cleanliness of the filling area is guaranteed. According to the full-automatic filling machine, full automation of cover opening, filling and cover locking is achieved, the safety and cleanliness of the filling process are improved, and the filling efficiency and the product quality are effectively improved.

The utility model discloses a bottle body pressing anti-rotation device, and relates to sealing equipment in the packaging field. The cap screwing device is simple in structure, can adapt to bottles of different structures and different characteristics, can stably hold the bottles in the cap screwing / unscrewing process, and plays a role in rotation prevention. The bottle body pressing anti-rotation device is installed on a rotating shaft of the cap screwing machine, a star wheel is fixedly installed on the upper portion of the rotating shaft, a fixing frame is fixedly installed in the middle of the rotating shaft, a cam is fixedly installed on the lower portion of the rotating shaft, a plurality of notches used for containing bottles are formed in the star wheel, and limiting steps are arranged in the notches. The cam is annular, and the upper surface of the cam arches upwards at the cap screwing station; the bottle body pressing anti-rotation devices correspond to the notches in the star wheel in a one-to-one mode, and each bottle body pressing anti-rotation device comprises a bottle support, a fixing base, a compression spring, a guide column and a rolling wheel. According to the method, the problem that tinplate bottles, thin-wall bottles and printing flower bottles cannot effectively restrain rotation is solved, and the method for preventing rotation by greatly increasing friction resistance without damaging bottle bodies is provided.

Closures (1) with a tamper evidence feature (5) that is reshaped to connect it to the container neck (2) are disclosed. Methods and systems (8) for carrying out the methods, and to mold stacks (102) for making the closures are also disclosed. The tamper evidence feature can be a band (5), a portion (505) of a cylindrical skirt (504) or a panel (705) formed in the cylindrical skirt (704). The application of heat may deform the band (5) inwardly to create a lip (52) for engaging a flange (20) on the container neck (2), or it may weld the tamper evidence feature (305) to the flange (220).

The invention relates to a production line and a station distribution method thereof.The production line comprises a conveying mechanism for conveying objects and a plurality of production mechanisms for machining the objects, and the production mechanisms are used for machining the objects on different conveying lines and connection stations; the ratio of the number of objects processed by a single first production mechanism at a time to the number of objects processed by a single second production mechanism at a time to the number of objects processed by a third production mechanism at a time is larger than or equal to 1, and the ratio is larger than or equal to 2 when set conditions are met. The longest-time-consuming production mechanism in all procedures is separated from other production mechanisms, the other production mechanisms machine objects on different conveying lines, through stepping movement of the conveying lines, the production mechanisms work many times to complete the machining amount the same as that of the longest-time-consuming production mechanism, the occupied area of the production line is reduced, and meanwhile the production efficiency is improved. And the positions of the production mechanisms can be reasonably arranged according to the sequence of production procedures.

The utility model relates to cap screwing equipment technical field provides a carbon powder bottle packing cap screwing equipment with positioning structure, including work table, the middle part of work table (1) top is provided with cap screwing structure, and the cap screwing structure includes cap screwing subassembly, clamping assembly and synchronous assembly, in the utility model, the bolt is extracted from the slot, and the clamping rod is pushed, and the two connecting blocks are moved, and the connecting block of serious wear is removed from the push -pull block, and the other connecting block moves to the push -pull block, and the connecting block movement drives the clamping rod to move, and the clamping rod drives the synchronous board to move in the replacement sliding slot, and the connecting block of serious wear is located at the inner wall of support frame, and the extracted bolt is inserted into the slot that is pasted with the support frame, thereby the synchronous board is fixed, and the connecting block position that is pasted with the push -pull block is fixed, and the second cylinder can be started to continue to push the clamping block clamping work, and the staff removes the clamping cover from the limiting sliding slot, and the mounting plate is extracted from the mounting groove, and the clamping block is disassembled.

The utility model provides a high-speed cap screwing machine for lipoic acid capsule packaging, which comprises a bottle body placing structure, the bottle body placing structure comprises a second rotating shaft and a placing bin, the top of the inner wall of the placing bin is provided with a rubber antiskid ring, the outer wall of the placing bin is provided with a positioning strip, and the positioning strip is matched with a fitting strip on the outer wall of a fitting plate at the bottom of a shell. The device is reasonable in design, the fitting plates and the fitting strips are arranged at different positions of the inner wall of the shell, so that the rotating direction of a bottle cap adsorbed in the bottle cap adsorption structure is opposite to that of a bottle body in the bottle body placement structure, the bottle body filled with lipoic acid capsules and the bottle cap can be quickly tightened, and the use is convenient. Therefore, the bottle cap can be quickly installed on the top of the bottle body through the cap screwing machine, and the internal lipoic acid capsule is sealed.

An aseptic apparatus (1) for filling and closing Aluminium or glass receptacles (100) with ROPP screw caps (101), the aseptic apparatus (1) comprising: - a filling unit (13) configured to inject a product within the receptacles (100); - a ROPP capping unit (10) arranged downstream the filling unit (13) and being configured to apply on the receptacles (100) the ROPP screw caps (101) already sterilized; - an isolator (11) delimiting a controlled-contamination environment (12), the filling unit (13) and the ROPP capping unit (10) being arranged inside the isolator (11).

The application relates to the technical field of cap screwing machines, and provides a cap screwing machine gripper, which comprises a mounting base, a rotating shaft rotatably connected to the mounting base, a driving piece arranged on the mounting base and used for driving the rotating shaft to rotate, a cap screwing cylinder arranged below the rotating shaft, a pneumatic clamping jaw arranged below the cap screwing cylinder, and a gas supply pipe used for supplying gas to the pneumatic clamping jaw, a protection mechanism is arranged outside the gas supply pipe, the protection mechanism comprises a bellows sleeved outside the gas supply pipe and a fixing assembly used for mounting the bellows to the gas supply pipe. The application has the beneficial effect of reducing the falling phenomenon of the gas supply pipe and making the equipment more convenient to use.

The invention discloses a multipurpose cover opening and closing device for a shielding tank, and relates to the technical field of shielding tank opening, which comprises a rack, a lifting driving mechanism, a lifting frame, a positioning ring, a rotary driving mechanism and a claw head assembly, the lifting driving mechanism is arranged on the rack; the lifting frame is connected with the lifting driving mechanism and is driven by the lifting driving mechanism to do lifting motion; the positioning ring is fixedly connected to the bottom of the lifting frame and is used for radially positioning the shielding tank body; the rotary driving mechanism is mounted on the lifting frame; the claw head assembly comprises a transmission shaft, a switch cover claw head and an elastic pressure applying part; the transmission shaft is in transmission connection with the rotation driving mechanism. The cover opening and closing claw head is connected to the bottom end of the transmission shaft. The elastic pressure applying part is used for providing elastic force tending to move downwards for the switch cover claw head. According to the cover opening and closing device, through cooperation of lifting and rotating motion and stable contact guaranteed by the elastic pressing part, whole-process automation of cover opening and closing operation of the shielding tank is achieved, and operation safety, precision and efficiency are remarkably improved.

The utility model belongs to the technical field of filling equipment, and particularly relates to a lifting type cover separating device which comprises a cover separating mechanism and a lifting driving mechanism, the lifting driving mechanism is arranged on the side of the cover separating mechanism, a cross beam is connected between the output end of the lifting driving mechanism and a tray, and a longitudinal beam is connected between the output end of the lifting driving mechanism and a baffle ring; the lifting driving mechanism drives the tray, the cap separating disc on the tray and the check ring to achieve synchronous lifting through the cross beam and the longitudinal beam, so that the height of bottle caps on the cap separating disc is always matched with the height of a clamping jaw of the cap screwing mechanism, and the lifting driving mechanism and the cap separating mechanism are independent modules and are connected only through the cross beam and the longitudinal beam. Side single-point support is adopted between the cross beam and the tray as well as between the longitudinal beam and the baffle ring, so that the number of parts is reduced, the overall layout is more concise and easy to clean, and when the height of the cover separating disc is manually adjusted through a top hand wheel, the height change can be observed at any time, so that the cover separating disc is rapidly adjusted in place.

To provide a cap holding device capable of surely holding a cap regardless of a cross-sectional shape of the cap and surely preventing misalignment of the cap when holding the cap.SOLUTION: A capping device comprises: an exterior section including a top board and an outer wall hanging down from a periphery of the top board and formed such that a lower part thereof is open so that at least an upper part of a cap to be held can be inserted thereinto; a suction pad which can be advanced / retracted, is connected to suction means via a suction channel, and is disposed to hang down from the top board inside the exterior section; and plural movable pins that are inserted through insertion holes formed in the top board and hanging down from the top board. The movable pins are formed movable upward and downward within a predetermined range.SELECTED DRAWING: Figure 1

The present invention particularly relates to a rotating apparatus for a container processing plant. The rotating apparatus includes a support frame having a notch and an annular lubricant channel surrounding the notch. The rotating apparatus includes a rotor plate arranged in the notch for rotation relative to the support frame, and the rotor plate has an annular collar extending from above into the lubricant channel.

The utility model discloses a bottle cap tightening device for food additive bottles, which comprises a pistol drill body, the output end of the pistol drill body is provided with a locking head assembly, the locking end of the locking head assembly is fixedly connected with a fixing rod, one end of the fixing rod is provided with a first connecting rod, and an auxiliary pressing assembly is arranged between the first connecting rod and the fixing rod. The first connecting rod is connected with the fixing rod through an auxiliary pressing assembly, a locking assembly is arranged at one end of the first connecting rod, a stabilizing assembly is arranged on the surface of the pistol drill body, the fixing rod is fixed to the proper position of the output end of the pistol drill through a locking head assembly, and the rotation stability of the fixing rod is guaranteed through connection of the locking head assembly and the fixing rod; one end of the fixing rod is connected with the first connecting rod through the auxiliary pressing assembly, the auxiliary pressing assembly comprises a sliding rod, a reset spring, a limiting block and a second connecting rod, downward pressing force is provided for the locking disc, then the bottle cap can be better attached to the bottle opening, and the locking assembly is arranged on the first connecting rod.

This invention relates to the field of bottle cap orientation adjustment technology, specifically to a bottle cap orientation adjustment device and method. The adjustment device is used to adjust the orientation of bottle caps with straws conveyed on a conveying mechanism, ensuring that the caps face the same direction. The conveying mechanism includes a conveying channel that conveys the bottle caps along an arc-shaped trajectory. This invention adjusts the orientation of the bottle caps during the conveying process by setting elastic mechanisms and adjustment mechanisms on both sides of the conveying channel along the arc-shaped trajectory. This ensures that after adjustment by the adjustment mechanism, all bottle caps rotate at different angles, achieving uniform orientation adjustment and avoiding missed adjustments. Preferably, the elastic mechanism rubs against the straw, causing the straw to rotate and drive the cap to rotate, thus completing the orientation adjustment without the need for an additional rotating device. This solution differs from the techniques in the prior art, enabling continuous adjustment of bottle caps during conveying.

The utility model provides bottle cap sealing equipment which comprises a bottle cap supply device, a bottle body conveying device and a sealing device, the sealing device comprises a base, a transverse linear module, a vertical linear module, a power module, a bottle cap clamping unit and a bottle body positioning unit, the transverse linear module is arranged on the base and connected with the vertical linear module, and the vertical linear module is arranged on the base and connected with the bottle body positioning unit. The power module is arranged on the vertical linear module and provided with a pivotable output end, the bottle cap clamping unit is arranged at the end of the output end, and the bottle body positioning unit corresponds to the bottle cap clamping unit, is arranged on the vertical linear module and is located below the bottle cap clamping unit. The bottle cap supply device is at least used for supplying bottle caps to the bottle cap clamping unit, and the bottle body conveying device and the base are arranged in a spaced mode in the horizontal direction and located below the bottle body positioning unit. The bottle cap sealing device solves the problems that bottle cap sealing equipment stops in the cap sealing process, and the working efficiency is affected.

The utility model belongs to the technical field of filling equipment, and particularly relates to a cap screwing gripper of a filling machine for producing single-walled carbon nanotube slurry, which comprises a hollow connecting rod and a cap screwing gripper, the adjusting piece is connected with the air cylinder through a piston rod; the connecting arms are circumferentially and symmetrically hinged to the lower edge of the connecting rod, and the adjusting part is located in the middle of each connecting arm; two sides of the upper parts of the supporting claws are respectively hinged with the adjusting piece and the connecting arms; the air cylinder is suitable for driving the adjusting piece to move in the axial direction of the connecting rod. When the adjusting piece moves upwards, the adjusting piece acts on the hinge point of the supporting claw through traction, so that the supporting claw is folded inwards to be meshed with the outer wall of the internal thread screw cap. When the adjusting piece moves downwards, the lower edge of the adjusting piece extrudes the guide inclined face of the supporting claw, so that the supporting claw expands outwards, and the inner wall of the external thread screw cap is supported.