450results about How to "Place stable" patented technology

The application belongs to the technical field of water treatment, and discloses a multifunctional swimming pool filtering and purifying water equipment, which comprises a movable trolley, the movable trolley is provided with a water storage tank, a disinfection tank and a filter tank, the disinfection tank is internally provided with an ultraviolet disinfection lamp group and an ozone generating device, a three-stage filtering structure is adopted in the filter tank, the movable trolley is provided with a liquid pumping pump one, a liquid pumping pump two and a water return pump, the output end of the liquid pumping pump two is connected with a water spraying mechanism through a water return pipe, the output end of the water return pump is connected with the water spraying mechanism, a water suction pipe is arranged on a water suction and cleaning assembly, and a water drainage pump is fixedly arranged on the filter tank. The disinfection tank is combined with the ultraviolet disinfection lamp group and the ozone generating device, all-round disinfection and sterilization are realized, the three-stage filtering structure of the filter tank comprehensively improves water quality, the water suction and cleaning assembly integrates multiple cleaning functions, the multi-stage electric push rod and the composite material scraper plate of the wall scraping assembly can efficiently remove dirt on the side wall of the swimming pool, and all-round and deep cleaning of the swimming pool is realized.

The beverage bottle convenient to grasp comprises a bottle body and an inner groove, the top of the bottle body is connected with a bottle opening, the surface of the bottle body is provided with a label face used for being attached with a label, and the surface of the bottle body and the bottom of the label face are annularly provided with a plurality of inwards-sunken grabbing grooves. The inner grooves are formed in the surface of the bottle body, the grabbing grooves are arranged in a V shape, reinforcing strips are arranged on the surface of the bottle body and located in the middles of the grabbing grooves, and the grabbing grooves are annularly formed in the bottom of the label surface of the surface of the bottle body, so that additional grabbing acting points are provided for a user; by means of the structure, fingers can be naturally embedded into the bottle body, the friction force between the hand and the bottle body is increased, the grabbing grooves are arranged in the V shape and further fit with the shapes of the fingers, the grabbing comfort and stability are improved, and a consumer can more easily and firmly grab the beverage bottle when opening the bottle cap for drinking beverages.

The invention discloses a bottom supporting device of a digital television, and relates to the technical field of digital television supporting equipment, the bottom supporting device comprises the digital television, and the bottom of the digital television is provided with a supporting piece; the supporting piece comprises a control table, the control table is located in the center of the lower portion of the digital television, adjusting strips are symmetrically connected to the two sides of the control table through adjusting pieces, the bottom of the digital television is aligned to the supporting piece, the adjusting strips are pulled, and angle blocks fixedly connected to the two ends of the two adjusting strips abut against the two sides of the digital television in a limited mode. The adjusting strip and the angle block move back under the resilience force of the spring to fix and limit the digital television, the digital televisions of different sizes can be effectively supported and fixed by adopting the mode, and after the digital televisions are limited and fixed by adopting the mode, the digital televisions can be conveniently fixed. The threaded connection block just faces a threaded installation hole, corresponding to the threaded connection block, in the digital television, installation of the digital television is facilitated, adaptability is wide, and the digital television is more practical.

The embodiment of the utility model provides a reversible micro host, which comprises a host body, the long side surface of which is provided with a USB interface, a display interface and a power supply interface; supporting legs are rotatably arranged on the short side face of the machine body. The supporting legs are perpendicular to the front face and the back face of the machine body after rotating by 90 degrees or 270 degrees. The rotatable supporting legs are arranged on the short side faces of the machine body, and the supporting legs are perpendicular to the front face and the back face of the machine body after rotating by 90 degrees or 270 degrees, so that the front face and the back face of the micro-host can be overturned and placed in the horizontal state. A user can flexibly adjust the placement direction of the host according to the actual space and the use scene, the host can be stably placed whether in the original vertical state or in the horizontal state after rotation, and the limitation of a traditional microcomputer in the placement mode is greatly broken through.

This utility model relates to the field of cement culvert production technology, specifically a vibration compaction device for cement culverts after cement pouring. It includes a frame, with a control shell fixedly connected to the top of the frame. A motor is fixedly connected to the rear side of the control shell, and a screw is fixedly connected to the front side of the motor's output end through the control shell. This utility model uses a cylinder to control the height of the adjustment box and clamping plates, positioning the cement culvert mold on the ground between two clamping plates. A hydraulic cylinder controls the movement of the sliding sleeve and clamping plates, clamping and fixing the mold. The cylinder then resets the mold, and the motor and screw control the movement of the threaded sleeve and adjustment box, transferring the mold to the top of the vibration table. The vibration table vibrates to defoam the concrete poured in the mold. After defoaming, the mold is transferred back to the ground, and the above steps are repeated for other molds.

The utility model discloses a kind of display devices of petroleum product sales, including bottom plate, support rod and support plate, the top of the bottom plate is fixedly connected with support rod, the top of the support rod is fixedly connected with support plate, the four corners of the bottom plate top are fixedly connected with support rod. The utility model is through the cooperation of bottom plate, support rod, support plate, support rod, positioning groove, connecting groove, clamping frame, connecting plate, sliding slot, moving frame, guide slot, sliding block, stabilizer, spring, isolation plate, through slot, pull handle, limit frame, limit rod and limit hole, the problem that the existing equipment is more used fixed structure, display board is often needed to consume more time and manpower when installing and disassembling, not enough convenient operation, in addition, the existing equipment can usually only be clamped to fixed size display board, lack of adjusting flexibility, lead to its application range is limited, difficult to meet the diversified display needs problem.

The utility model relates to the technical field of capacitor guide pins, in particular to a packaging box for capacitor guide pins, which comprises a box body, the surface of the box body is movably connected with a box cover, the outer surface of the box body is fixedly connected with a fixing plate and a side plate, and the inner surface of the box body is fixedly connected with a grid plate. The outer surface of the box cover is fixedly connected with a fixing block and a connecting plate, and the inner surface of the box cover is fixedly connected with a supporting spring and a sleeve. According to the utility model, the pressing plate is installed on the surface of the box cover and the supporting spring is arranged on the surface of the box cover, so that the capacitor guide pin main body can be installed and fixed under the action of the supporting force applied by the supporting spring after being separated and limited by the grid plate, and the capacitor guide pin main body can be placed more firmly and stably without being scattered; the condition of damage caused by collision with other groups or packaging boxes is avoided, and meanwhile, the connection of the sleeve and the insertion rod can be realized under the connection of the sliding groove and the sliding block.

Sliding grooves are formed in the top of a machining table and close to the edges of the two sides, the sliding grooves are detachably connected with a door frame through sliding blocks in the sliding grooves, a telescopic rod is arranged below the door frame, the output end of the telescopic rod is detachably connected with a connecting plate, one side of the connecting plate is rotationally connected with a cutting frame, and the cutting frame is rotationally connected with the machining table. The foam processing device has the following advantages that foam needing to be processed is placed on the placing disc and pressed forcibly, so that the inserting column is inserted into the foam, the foam can be stably placed in cooperation with adsorption of the suction cup, then the driver is started to drive the placing disc to rotate, and therefore the foam is driven to rotate; the rotating foam can be matched with a cutting path, the cutting smoothness is improved, meanwhile, the cutting frame can be driven to move through the moving block, the telescopic rod and the motor, so that operation of different cutting paths is completed, the foam does not need to be adjusted through shutdown, and the cutting operation efficiency is improved.

The application provides a surveying and mapping instrument positioning device for engineering surveying and mapping, and relates to the technical field of engineering surveying and mapping equipment, which comprises a support seat and further comprises an expansion adjusting assembly, wherein the expansion adjusting assembly comprises a first driving motor mounted at the bottom of the support seat, in the application, the gear engages to drive two centrally symmetrical racks to move reversely, the moving seat is synchronously moved with the racks through sliding cooperation with the linear guide rails, flexible adjustment of the distance between the support rods is realized, the rotating seat can rotate around the support frame, the angle is adjusted through the arc-shaped guide rails, and the positioning is completed by tightening the first knob bolt after the rotating seat is in place, in the multistage telescopic assembly, the support rods, telescopic rods and fine adjustment rods can slide along the length direction, are stretched to a suitable height as required, and are locked and fixed through corresponding knob bolts, the support rods on the support seat and the rotating seat are matched, telescopic adjustment and angle adjustment are combined, quick and flexible adjustment of the support span, the angle and the height is realized, and stable placement of the surveying and mapping instrument under various terrains is ensured.

The application provides a blade arc grinding process and belongs to the technical field of blade processing. The blade arc grinding process comprises the following steps: fixing the bottom of the blade through a lower fixing mechanism to facilitate the placement of the blade; fixing the upper part of the blade through an upper fixing mechanism to facilitate the grinding of the blade; installing the grinding wheel body through an installation mechanism to facilitate the replacement of the grinding wheel body; moving the grinding wheel body through a driving mechanism to facilitate the grinding of the blade by the grinding wheel body; and placing the blade in the fixed groove through the lower fixing mechanism, and the elasticity of the two return springs in each automatic clamping assembly enables the clamping block to automatically fix the bottom of the blade, so that the blade is placed more stably.

This utility model discloses a freeze dryer that facilitates loading and unloading of materials, belonging to the field of freeze dryer technology. It includes a freeze drying chamber with a loading mechanism at the lower inner side. A freeze drying plate is provided on one side of the loading mechanism, with a through hole at the top. A glass door is provided on one side of the freeze drying chamber, and a placement mechanism is provided at the bottom of the chamber. The loading mechanism allows the bottom plate to slide within two slide rails. By aligning the connecting posts of the two freeze drying plates vertically and inserting the insert block at the bottom of the upper connecting post into the second insert hole of the lower connecting post, the two freeze drying plates can be stacked and connected. The bottom freeze drying plate is then inserted into the first insert hole of the bottom plate in the same way, allowing multiple freeze drying plates to be stacked on the bottom plate. The bottom plate is then inserted into the slide rails and secured with a pin. When items need to be removed from the freeze drying plates, simply pull out the pin and pull out the bottom plate. By connecting multiple freeze drying plates and then pulling out the bottom plate, loading and unloading materials is convenient.

This utility model discloses a compound probiotic raw material mixing device, including a mixing tank. A feed pipe is fixedly installed on the mixing tank, and a discharge pipe is fixedly connected to the bottom of the mixing tank. An electromagnetic valve is fixedly installed on the discharge pipe. An installation ring is rotatably arranged inside the mixing tank. Two sets of connecting rods are fixedly installed on the circumference of the installation ring. Each set of connecting rods is fixedly connected to a vertical rod. An arc-shaped scraper is installed on one side of each vertical rod, and one side of the arc-shaped scraper is in contact with the inner wall of the mixing tank. An installation plate is fixedly connected to the upper end of each vertical rod. In this utility model, the arc-shaped scraper scrapes off the raw material adhering to the inner wall of the mixing tank. The stirring rod and the auger blade work together to stir and mix the raw material, improving the uniformity of the mixture and ensuring a balanced distribution of probiotics, thereby improving the overall quality and efficacy of the product.

This utility model discloses a novel integrated fishing box, relating to the field of fishing tackle technology. It includes a one-piece molded box body and a lid hinged to the top of the box body. The top surface of the box body has a recessed receiving cavity, and the two outer side walls of the box body have integrally molded protruding mounting portions. Each mounting portion has a handle, and an elastic buckle is provided between the handle and the mounting portion. The bottom of the box body has a mounting block, and the top surface of the mounting block has an internally hollow adjusting shell. A locking seat is fitted inside the mounting block, and the locking seat has a movable through groove in its center. A support member that can enter the adjusting shell or extend from the locking seat is provided within the movable through groove. The side of the locking seat facing away from the box body has a recessed locking groove communicating with the movable through groove. The locking groove contains a locking switch, a first pivot, and a first torsion spring. The locking switch has a locking portion at the bottom and an anti-detachment portion at the top. The side walls of the box body have openings. This utility model uses a one-piece molded box body, enhancing the durability and stability of the overall structure of the fishing box.

The utility model provides a kind of aeration pipe for compost, mainly relates to aeration equipment technical field.A kind of aeration pipe for compost, including aeration pipe, the both ends of the aeration pipe are respectively screwed with quick connector, the top surface of the aeration pipe is equipped with several evenly distributed aeration holes, and the section of the aeration pipe is regular hexagon structure.The utility model has the beneficial effect that: aeration pipe adopts regular hexagon section design, can be stably placed on ground when installing, avoid the deviation of aeration hole caused by rolling, ensure that gas is evenly discharged;Evenly distributed aeration hole makes the gas distribution of compost area more balanced, effectively improves oxygen supply efficiency, promotes the uniformity and efficiency of compost fermentation process, provides stable environment for microbial activity.

The invention relates to novel liquid body temperature circulation temperature control equipment, and belongs to the technical field of medical temperature control equipment. The device comprises an equipment base, a temperature control host, a stand column, a T-shaped installation frame, a pipeline assembly, a temperature control assembly and a temperature sensing assembly, the stand column is fixedly installed above the equipment base, the temperature control host is installed on one side of the stand column, the T-shaped installation frame is fixedly installed above the stand column, a lifting hook is installed below the T-shaped installation frame, and the pipeline assembly is installed above the lifting hook. The temperature control assembly is fixedly installed on one side of the temperature control host, and the temperature sensing assembly is installed on one side of the lower portion of the temperature control host. The temperature control equipment monitors the pipeline output temperature and the core body temperature of a patient in real time through the temperature sensing assembly, the temperature control host adjusts the temperature control power in a closed-loop feedback mode based on monitoring data, accurate, rapid and stable temperature control is achieved, the equipment is suitable for various clinical scenes needing mild hypothermia intervention such as thermoplegia and the syndrome after cardiac arrest, treatment safety and effectiveness are improved, and the treatment cost is reduced. And the workload of medical staff is reduced.

The utility model discloses an aluminum template reinforcing system for a large rectangular section column, which belongs to the technical field of building template reinforcing construction, and comprises a supporting assembly arranged on a transverse plate, the supporting assembly comprises a fixing block, a connecting rod and a supporting plate, the fixing block is fixedly arranged on the transverse plate, a containing groove is formed in the fixing block, and the connecting rod is arranged in the containing groove. A containing groove is formed in the transverse plate, the connecting rod is rotationally connected into the containing groove, telescopic rods are rotationally arranged at the two ends of the connecting rod, the other ends of the telescopic rods are fixedly connected to the transverse plate, the supporting plate is fixedly connected to the connecting rod, a limiting groove is formed below the containing groove, and when the supporting plate rotates to be perpendicular to the transverse plate, the telescopic rods retract. The aluminum template reinforcing system has the advantage that the installation efficiency of the aluminum template reinforcing system is improved.

The soil drying box with the intelligent temperature control function is applied to the field of drying devices and comprises a drying device body, a plurality of independent drying compartments are arranged at the front end of the drying device body, and sealing cabinet doors are hinged to the front ends of the independent drying compartments. A drying air outlet is fixedly connected to the rear inner wall of each drying independent compartment, a dust suction hollowed-out strip is arranged on the upper side of the rear inner wall of each drying independent compartment, and a soil containing cup is placed on the lower inner wall of each drying independent compartment. During drying, the electric push rod drives the inner vertical rod to drive the special fork-shaped outer claw strip rod with the roughened surface to be pushed up and down in a reciprocating manner in a soil sample, an agglomeration structure is destroyed, and the contact area of the soil and hot air is increased to assist in improving the drying efficiency.

The utility model relates to the technical field of tablet detection equipment, and discloses a tablet friability detector capable of being obliquely adjusted, which comprises a box body, the inner wall of the box body is fixedly connected with a fixed plate, the top of the fixed plate is fixedly connected with a motor, and the output end of the motor is rotatably connected with a second rotating shaft. The top of the second rotating shaft is fixedly connected with a first gear, the outer wall of the first gear is meshed with a second gear, the outer wall of the second gear is fixedly connected with a rotating column, the outer wall of the rotating column is fixedly connected with a rotating bin, and the front end of the outer wall of the rotating column is fixedly connected with a rotating ring. In the utility model, if an article is inclined, the rotating disc can be rotated by holding the handle, the rotation of the rotating disc can drive the driving shaft to rotate along with the rotating disc, the worm is arranged on the outer side of the driving shaft, so that the worm can rotate along with the driving shaft, the rotation of the worm can further drive the worm wheel to rotate, and the rotation of the worm wheel can drive the first rotating shaft to rotate.

The utility model discloses an elevator guide rail automatic installation device which comprises a first installation bottom plate, a second installation bottom plate is arranged on the first installation bottom plate in a mirror image mode along the center, and an elevator guide rail body is arranged on the top of the second installation bottom plate and the top of the first installation bottom plate. A first lantern ring is connected between the first installation bottom plate and the outer side face of the elevator guide rail body in a sleeved mode, a second lantern ring is connected between the second installation bottom plate and the outer side face of the elevator guide rail body in a sleeved mode, first connecting rings are arranged at the front end and the rear end of the first installation bottom plate, and second connecting rings are arranged at the front end and the rear end of the second installation bottom plate. The bottom sides of the centers of the first connecting rings at the two ends are connected with first lantern rings, the bottom sides of the centers of the second connecting rings at the two ends are connected with second lantern rings, and the two sides of the tops of the first connecting rings at the two ends are in threaded connection with right mounting bolts on the side end faces of the first mounting bottom plate. Left mounting bolts are in threaded connection with the two sides of the tops of the second connecting rings at the two ends and the side end face of the second mounting bottom plate, and the unstable state is avoided.

The utility model relates to transportation equipment technical field, concretely relates to a back unloads semi -hitch bottom plate, including the frame, the middle part of frame is installed with the bearing plate, the bearing plate includes the base body, is equipped with the anti -deformation structure on the base body, the both sides of base body are equipped with the fixed connection extension plate of the side plate welding of frame, the bending projection is along the length direction of base body and is integrated with base body through the form of stamping, every bending projection's both sides are equipped with the transition plate, the bending projection can strengthen the compression strength of car bottom plate, when the pressure of the material that accepts is applied, the strength of car bottom plate longitudinal is promoted, especially when transporting the box goods, still have good receiving effect, guarantee the bottom stable placement of material.

The utility model discloses a factory silkworm breeding shelf, including net board, still include mechanical hand grab and support containment structure, and the shelf is grabbed through the mechanical hand grab, and the support containment structure is used for supporting the shelf, the utility model discloses enough bottom support is provided for the shelf, makes it can be stably placed on the silkworm frame or cover on the last instar shelf, and can produce fixed gap between the last instar shelf, basically is not affected by the deformation of the shelf. In addition, the support containment structure has the effect of protecting the silkworm under the ring, prevents a small part of silkworms from climbing out of the last instar shelf, so that all silkworms can be oriented to climb to the top surface of the shelf and eat in time.

This utility model discloses a gastric lavage machine that prevents leakage, comprising a gastric lavage machine body. A set of guide grooves is formed on the inner wall of the gastric lavage machine body. A guide block is slidably connected to the inner wall of the guide grooves. A metal pull-out frame is fixed to the outer wall of the guide block. Two sets of support rods are fixed to the inner wall of the metal pull-out frame. A support plate is fixed to the outer wall of the support rods. A transparent clear water tank and a transparent wastewater tank are placed on the top outer wall of the support plate. A drain pipe and an inlet pipe are provided on the outer wall of the gastric lavage machine body. Connectors are threaded to the outer walls of the drain pipe and the inlet pipe, respectively. A drain hose and an inlet hose are fixed to the inner wall of the connectors. A first handle is fixed to the outer wall of the metal pull-out frame. A cover plate is hinged to one side of the outer wall of the gastric lavage machine body. In this utility model, the transparent clear water tank and the transparent wastewater tank can be stably placed inside the gastric lavage machine body under the overall restraint and protection of the metal pull-out frame, preventing the transparent clear water tank and the transparent wastewater tank from tipping over during operation of the gastric lavage machine body.

The utility model discloses a chemical auxiliary agent filling device with an anti-toppling structure, which relates to the technical field of chemical production and comprises a base, a fixed carrier plate is fixed at the top of the base, a movable seat is slidably connected in the fixed carrier plate, a placing seat is elastically connected in the movable seat, a placing groove is arranged in the placing seat, and the placing groove is internally provided with an anti-toppling structure. The interior of the placing groove is used for placing a chemical additive storage cylinder, an anti-toppling piece is arranged on the placing seat, a through groove is formed in the bottom of the fixed carrier plate, a sliding seat is slidably connected into the through groove, and the top of the sliding seat is fixedly connected with the bottom of the moving seat; according to the device, the filled chemical auxiliary agent barrels can be moved to transfer equipment, manual carrying is avoided in the process, the working efficiency is improved, the labor cost is saved, the chemical auxiliary agent barrels are stably placed, and the vibration amplitude in the transferring process is reduced.

The machine tool comprises two machining stations and a clamping station, the two machining stations are located at the two ends of the clamping station respectively, the clamping station comprises a containing plate, a pressing assembly and a rotating assembly, the containing plate is provided with a containing groove, the pressing assembly is located in the containing groove, and the rotating assembly is located in the containing groove. The pressing assembly is located above the containing groove, the rotating assembly is located below the containing plate and comprises a rotating wheel and a driving motor, a rotating groove is formed in the lower end face of the containing plate, and the containing groove can communicate with the lower end face of the containing plate through the rotating groove. A first driving wheel is fixedly connected to a rotating shaft of the rotating wheel in a sleeving mode, a second driving wheel is fixed to the output end of the driving motor, and the first driving wheel and the second driving wheel are synchronously connected through a belt. The chamfering machine has the effect of improving the practicability.

The utility model relates to the technical field of jack, and disclose a four -column jack lifting frame, including main part mechanism, both sides of main part mechanism all are provided with fixed establishment, main part mechanism includes bottom plate, bottom plate top corner all are fixedly connected with hydraulic jack body, the pump rocker of two hydraulic jack bodies behind bottom plate both sides all have and insert the first connecting rod, first connecting rod front end fixedly connected with connecting barrel, connecting barrel is provided with two, two connecting barrel all insert support rod, two support rod far from two connecting barrel one end fixedly connected with second connecting rod. This four -column jack lifting frame, four -column jack lifting frame adopts four hydraulic jack bodies to work simultaneously, can provide even support force, compared with single -point jack, when supporting larger area or longer object, has improved stability greatly, has reduced the risk of lateral tilting effectively, has guaranteed operation safety.

The utility model relates to straightening press technical field discloses straightening press suitable for soft quality steel straightening, including work table, the top of work table is provided with adjusting mechanism, the top of adjusting mechanism is provided with down -the -press subassembly, down -the -press subassembly is used for rectifying soft quality steel, the right side of work table is provided with fixed component, fixed component is used for fixed adjusting mechanism, the back of work table is provided with detection component, detection component is used for detecting soft quality steel bending degree, the bottom fixed connection of work table has support seat, the bottom of support seat is provided with horizontal component, horizontal component is used for adjusting device is in horizontal state. In the utility model, when straightening soft quality steel, rotating the rotary disc adjusts the adjusting pad block interval to adapt to the hardness of steel, the steel is put into the correction groove, the detection head is pressed into the groove to measure the bending degree, the down -the -press subassembly is pressed down, the adjusting pad block cooperation increases the deformation of the bending place, satisfies the straightening demand.

The utility model relates to the technical field of servo motors, in particular to an integrated machine body structure for a servo motor, which comprises a machine shell cylinder with a front cover, a round through hole is arranged at the axis position of the front cover, and an oil seal ring groove, a bearing ring groove and a glue containing ring groove are sequentially arranged along the inner wall of the round through hole from outside to inside. A stator iron core axial limiting flange is arranged at the position, close to the front cover, of the inner wall of the shell cylinder; a plurality of rear cover connecting bosses are symmetrically arranged at the position, close to a rear port, of the outer wall of the machine shell barrel, and a power line box mounting position is arranged at the top of any rear cover connecting boss. And a power line outlet and a grounding screw hole which can penetrate through the rear cover connecting boss and the shell cylinder are formed in the power line box mounting position. The machine body structure is simple in structure, can realize rapid and accurate assembly of subsequent components such as a stator and a rotor, can realize sealing only through a movably connected rear cover, and realizes front and back wiring through a power line outlet.

The utility model provides a kind of portable mixed loading emulsion explosive auxiliary charging device, including gyro wheel, annular groove for limiting coil position is processed in the middle part position of gyro wheel outer surface, the two sides of gyro wheel are equipped with first baffle, the two ends of first baffle are equipped with pipe column, the two sides along its width of gyro wheel are equipped with the second baffle of vertical arrangement with first baffle, one second baffle farthest from gyro wheel is equipped with cross pipe directly above, the two ends of cross pipe are respectively connected with two pipe columns and are fixed, hollow tube of oblique arrangement is installed in the middle part position of cross pipe outer surface, the end of hollow tube away from cross pipe is equipped with handle, the utility model has following beneficial effects: emulsion explosive is recovered coil simultaneously in conveying process, coil is retracted by gyro wheel rotation, reduce the friction of coil and blasthole mouth, improve charging efficiency.