28results about How to "Realize automatic retraction" patented technology

The invention discloses a low-altitude fertilizer spraying unmanned aerial vehicle applied to modern agriculture, and relates to the technical field of agricultural instruments.The low-altitude fertilizer spraying unmanned aerial vehicle comprises an unmanned aerial vehicle body, a pesticide tank is fixedly connected to the lower side of the unmanned aerial vehicle body, an air pump is fixedly connected to the outer wall of the pesticide tank, and the output end of the air pump communicates with the interior of the pesticide tank; a feeding pipe is further fixedly connected to the outer side wall of the medicine tank, the interior of the medicine tank communicates with the outer side of the medicine tank through the feeding pipe, a sealing cover is in threaded connection with the inner wall of the end, away from the medicine tank, of the feeding pipe, and a fertilizer spraying mechanism is arranged in the middle of the medicine tank. When the fertilizer is sprayed, the pigment can be sprayed out through the atomization spray head to mark the sprayed area, the problem that due to insufficient fertilizer, part of land parcels are lack of fertilizer or excessive fertilizer is sprayed is solved, the accuracy and uniformity of fertilizer spraying are improved, and the fertilizer spraying device has the advantages of being high in practicability and capable of effectively conducting refined fertilizer management on crops.

The utility model provides a diaphragm air permeability value testing device which comprises a rack, an unwinding mechanism, a testing mechanism, an air supply mechanism and a winding mechanism, the unwinding mechanism is arranged on the rack and used for unwinding and conveying a diaphragm, the testing mechanism comprises testing clamping assemblies and a flow testing assembly, the testing clamping assemblies are arranged on the two surfaces of the diaphragm, and the flow testing assembly is arranged on the two surfaces of the diaphragm. The flow testing assembly is used for clamping the diaphragm, can be connected with the diaphragm in a sealed mode and is used for achieving circulation of airflow from one surface to the other surface in a clamped area of the diaphragm, and the flow testing assembly is used for monitoring the flow of the airflow passing through the flow testing assembly so that the air permeability of the diaphragm can be tested. The air supply mechanism is communicated with the testing mechanism and is used for providing the air flow for the testing mechanism, the winding mechanism is arranged on the rack and is used for winding and forming the diaphragm, the testing mechanism is arranged between the unwinding mechanism and the winding mechanism, and the testing efficiency and accuracy of the air permeability of the diaphragm can be improved.

The invention relates to an ice cream machine and a control method thereof. The ice cream machine comprises a shell, a driving assembly, a stirring assembly and a cup body assembly. The driving assembly is mounted in the shell; the stirring assembly comprises a stirring shaft and a tool bit, and the driving assembly is connected with the stirring shaft; the cup body assembly is connected with the shell, and the tool bit is arranged in the cup body assembly; the ice cream machine has a locking state and an unlocking state, the driving assembly drives the stirring shaft to rotate and / or ascend and descend so as to achieve automatic switching between the locking state and the unlocking state, the locking state is configured to be that the tool bit is assembled on the stirring shaft, and the unlocking state is configured to be that the tool bit is assembled in the cup body assembly. According to the ice cream machine, automatic feeding and automatic retracting of the tool bit can be achieved; in the unlocking state, a user can detach the cup cover and the cutter head together, cleaning of the cutter head is facilitated, connection of the cutter head is stable through cooperation of an installation buckle and a limiting protruding column, and the phenomenon that the cutter head falls off is avoided.

The charging pile comprises a shell and an automatic take-up and pay-off mechanism, a display screen is arranged at the upper end of the front side of the shell, a cable box is arranged on the right side of the shell, an end cover is arranged on the right side of the cable box, a slot is formed in the upper end of the front side of the cable box, and a connector is arranged at the lower end of the rear side wall of the cable box. A charging gun head is inserted in the slot, a cable is arranged between the charging gun head and the connector, the automatic take-up and pay-off mechanism is arranged in the cable box, and the automatic take-up and pay-off mechanism and the cable are installed in a matched mode; the transformer is arranged in the shell, and the single chip microcomputer is arranged in the middle of the front end of the shell. Automatic winding and unwinding of the cable are achieved through friction force of the rubber guide wheel and vertical displacement of the guide wheel, the winding and unwinding process is more stable, the influence on the cable is smaller, a vehicle owner can be reminded in time, and the cable is prevented from being damaged due to excessive pulling.

The invention relates to the technical field of wind power flange machining, in particular to a cutting device for wind power flange machining. A supporting circular truncated cone; the positioning and supporting unit is arranged on the outer side of the supporting circular truncated cone in a surrounding mode and connected with the supporting circular truncated cone; the synchronous cutting unit is connected with the mounting base, the supporting circular truncated cone and the positioning and supporting unit; wherein the synchronous cutting unit comprises a supporting transmission control assembly, an automatic driving control assembly, a retractable cutting assembly and a synchronous pressure guiding assembly, by arranging the synchronous cutting unit, wind power flanges of different sizes can be supported and positioned, all-directional locking of the wind power flanges is completed, the stability of the wind power flanges during machining is guaranteed, and the machining efficiency is improved. According to the wind power flange cutting device, the wind power flange can be cut in a fragmented mode at a time, automatic folding and unfolding of the cutting device can be achieved in the locking process, people can take and place the wind power flange conveniently, and the cutting efficiency and accuracy are improved.

The present invention discloses an inflatable flexible solar panel, which includes a main body, a solar panel, an airbag assembly and a reset member. The solar panel is connected to the main body and has a contracted state and an expanded state. The airbag assembly is arranged on the backlight surface of the solar panel. The airbag assembly is configured to change the solar panel from the contracted state to the expanded state when inflated. The reset member is arranged on the backlight surface of the solar panel. The reset member is configured to change the solar panel from the expanded state to the contracted state when the airbag assembly is deflated. The inflatable flexible solar panel, because the airbag assembly and the reset member are arranged on the backlight surface of the solar panel, can not only improve the rigidity of the solar panel in the expanded position, reduce the influence of the external structure on the solar panel, and ensure the normal use of the solar panel, but also realize the automatic retraction of the solar panel, without the need for manual storage of the solar panel, which facilitates the use of the solar panel and improves the user satisfaction.

The utility model discloses a silk screen printing machine convenient to remove, include: mobile box, top fixed support, top fixed support installs at the top of mobile box, the top fixed support on the sliding setting is limited slide, the utility model has the beneficial effect is: equipment bottom integrated liftable mobile wheel, drives the adjustment screw through servo motor, drives the inner sliding board along no.

The utility model discloses a quickly retractable vertical shaft mouth maintenance platform which comprises a bottom frame, and a retracting mechanism is mounted on one side of the upper end of the bottom frame. The maintenance platform has the advantages that when a cage at a wellhead of a coal mine vertical shaft and a steel wire rope for lifting the cage are maintained, the main maintenance platform is automatically collected and released by means of the collecting and releasing mechanism, the auxiliary maintenance platform is automatically collected and released by means of the rotating mechanism, the laying efficiency of the main maintenance platform and the auxiliary maintenance platform is greatly improved, and the maintenance cost is reduced. Meanwhile, in cooperation with a tool bag and a protective baffle on the main overhauling platform, centralized storage of overhauling tools is achieved, the potential safety hazard that the workers accidentally fall off due to repeated walking is avoided, and the working efficiency is improved. And the defect that the overhauling tool accidentally falls into the coal mine vertical shaft to damage equipment in the overhauling process is overcome, so that the overall safety of the overhauling platform is better.

The utility model discloses a kind of automatic take-up reel of garden irrigation sprinkler head, belong to reel technical field.This kind of automatic take-up reel of garden irrigation sprinkler head, including shell, the inside rotation of shell is connected with winding wheel, and the inside of winding wheel is provided with hollow structure, the outer wall of winding wheel is wound with hose, the outer wall of shell is opened with pipe hole in one side, one end of the hose is passed through pipe hole, and is connected with sprinkler, the outer wall of winding wheel is opened with the interface of the hose one end intercommunication in one side, the bottom surface of winding wheel is connected with swivel joint, the top surface of shell is equipped with driving assembly, the top surface of driving assembly is installed with motor, the utility model is in cooperation with the use of winding wheel, hose, sprinkler, swivel joint, driving assembly and motor, so that the take-up reel is carried out conveniently to the pipe of sprinkler head and realizes easy take-up.

This utility model discloses a cold storage facility for fresh food preservation, relating to the field of cold storage technology. The cold storage facility includes a refrigerated storage room, with a door rotatably connected to the side of the refrigerated storage room via a pin. An entrance / exit corresponding to the door is located at the end of the refrigerated storage room, and a folding ramp is inclinedly provided at the bottom of the entrance / exit. The folding ramp includes an inclined main plate, and a folding connector is inclinedly provided at the corner of the inclined main plate near the door. A dovetail-shaped groove is provided at the bottom of the door, and an adjustable slider that slidably engages with the folding connector is also provided in the dovetail-shaped groove. This utility model provides a folding ramp and a folding connector that can fold together between the refrigerated storage room and the door. When the door is opened, the folding ramp and folding connector can be tilted at the exit position, facilitating the entry and exit of transport vehicles and preventing the door from automatically closing during cargo handling.

The present invention relates to the field of coal mine measurement technology, and in particular to a portable magnetic claw support spacing measuring device for coal mines, comprising a hollow round rod and a handle, the left end of the outer side of the hollow round rod is fixedly connected with the handle, the right end face of the hollow round rod is fixedly connected with a storage mechanism, the left side of the inside of the hollow round rod is rotatably connected with a retracting and releasing mechanism, a guide mechanism is provided on the right side of the retracting and releasing mechanism, the front and rear end faces of the guide mechanism are fixedly connected to the hollow round rod, a connecting block is fixedly connected to the right side of the retracting and releasing mechanism, a hanging ring is fixedly connected to the right end face of the connecting block, and a sleeve is fixedly connected to the other end of the hanging ring; in the present invention, the automatic retracting and releasing of the measuring leather rope can be realized by arranging the hollow round rod, one end of the measuring leather rope can be stably fixed under the action of the magnet, and can be operated by a single person, compared with the measurement with a tape measure, the error of this device is smaller, and the measurement is more accurate, and this arrangement can measure the spacing between anchor rods and anchor cables at any position without dead angles.

The invention relates to the technical field of electric energy meters, and discloses a circuit anti-drop intelligent electric energy meter comprising an electric energy meter body, the electric energy meter body is provided with a wiring groove, the wiring groove is internally provided with a protective cover plate, the protective cover plate is fixedly provided with a positioning block, the positioning block is provided with a positioning groove, and the positioning groove is internally provided with an anti-drop wire. A mounting seat is fixed on the electric energy meter body, a positioning insertion block matched with the positioning groove is arranged in the mounting seat, a sliding rod is fixed at one end of the positioning insertion block, the sliding rod is elastically connected with the mounting seat through a first spring, and a positioning hole is formed in the positioning insertion block; through the second knob screw and the first knob screw which are arranged at the same time, lawbreakers can be puzzled, the lawbreakers cannot know the number of rotation turns of the first knob screw or the second knob screw and cannot open the protective cover plate, the purpose that only workers can open the protective cover plate can be achieved, and the protection effect on the electric energy meter body is greatly improved.

The utility model relates to the field of backhoe loader supporting leg control, and discloses a backhoe loader supporting leg folding and unfolding control circuit which comprises a frequently-used electric power supply, a starting electric power supply and a device electric power supply, and the frequently-used electric power supply is connected with a first normally-closed relay and a second normally-closed relay in parallel. The first normally-closed relay and the second normally-closed relay are electrically connected to the controller, a supporting leg placing inductive switch and a supporting leg retracting inductive switch are connected to the starting electric power source in parallel, a first normally-open relay and a second normally-open relay are connected to the device electric power source in parallel, and the first normally-open relay is electrically connected with a supporting leg placing electromagnetic valve. And the second normally open relay is electrically connected with a landing leg retracting electromagnetic valve. The device is easy to operate, the supporting legs can be automatically folded and unfolded, the operation burden of personnel on the vehicle is relieved, and the operation safety is improved. Meanwhile, the system has abundant functions and can meet diversified requirements of modern engineering construction.

The invention relates to the technical field of metal detectors, in particular to a metal detector convenient to control ground clearance, which comprises a support shell; the detecting instrument body is detachably connected with the supporting shell; the retractable moving units are arranged on the inner side of the supporting shell, are symmetrically arranged and are connected with the supporting shell; the plug-in type control unit is in plug-in connection with the retractable type moving unit; wherein the retractable moving unit comprises a plug-in transmission assembly, a pressure adjusting assembly and a trundle assembly, the retractable moving unit is arranged and matched with the plug-in control unit, so that the distance between the detector body and the ground can be flexibly adjusted, and rapid disassembly and assembly of equipment can be realized; and automatic folding and unfolding of the trundle assembly can be achieved in the dismounting and mounting process, great convenience is provided for storage of the equipment, and the safety and convenience of the equipment in the using process are enhanced.

The present invention discloses a push pen with a nib sealing structure, comprising: a pen barrel, an inner rod and a nib, wherein the inner rod is movably inserted in the pen barrel and is provided with a first return spring, the nib is installed at the lower end of the inner rod, the upper end of the pen barrel is hinged with a pen clip and a second return spring is installed therebetween, a locking structure is installed between the pen clip and the inner rod, and when the inner rod moves so that the nib extends out of the pen barrel, the locking structure locks the nib; a sealing structure for sealing the nib is installed between the inner rod and the pen barrel, and the sealing structure can be opened to avoid or closed to form a closed space on the nib when the nib moves. The push pen has a simple structure, is easy to assemble, can realize automatic retraction of the nib, is very convenient to use, will not easily cause damage to the nib or stain objects with ink, effectively prevents the evaporation of ink on the nib, and increases the service life of the pen.

The utility model relates to the technical field of casting, in particular to a novel pneumatic expansion core setting device capable of realizing quick and firm clamping, which comprises a lifting ring, a connecting block fixedly connected to the bottom of the lifting ring, a plurality of leveling components arranged around the connecting block at intervals, the upper ends of the leveling components are mounted on the connecting block, and the lower ends of the leveling components are arranged at the top of a mounting plate. A first motor is arranged in the middle of the mounting plate, a motor shaft of the first motor is connected with a gear set, driving parts are arranged at the bottoms of the left end and the right end of the mounting plate respectively, the inner ends of the two driving parts are connected with the gear set respectively, and the two pneumatic expansion parts are movably connected with the corresponding driving parts respectively. And in a working state, the lower ends of the two pneumatic expansion pieces respectively extend into matched grooves at the top of the sand core. The sand core setting device has the advantages that the sand core is firmly clamped through the friction effect of the silica gel expansion sleeve, and efficient and rapid core setting is achieved; adjustment of the clamping position and leveling of the mounting plate are automatically completed, the working efficiency of the device is improved, and the stability of the device is guaranteed.

The invention belongs to the technical field of motor homes, and discloses a carriage jacking device and a motor homes, the carriage jacking device comprises a carriage body, a top cover assembly, a lifting assembly and turning plates, the top cover assembly comprises a top cover, long side walls and short side walls, and the turning plates are hinged to the open end of the carriage body and matched with corresponding notches; guide pieces are arranged on the two opposite sides, away from the hinged end, of the turning plate and matched with the corresponding sliding rails. When the top cover assembly moves upwards under the action of the lifting assembly, the two turning plates are unfolded along the sliding rails through the guide pieces and matched with the corresponding notches. When the top cover assembly moves downwards under the action of the lifting assembly, the two turning plates are folded along the sliding rails through the guide pieces and are separated from the corresponding notches. According to the carriage jacking device with the structural design, automatic folding and unfolding of the turning plate can be achieved, meanwhile, through cooperation and separation of the turning plate and the notch, a sealed space can be conveniently formed when the top cover assembly is unfolded, and the two opposite side walls of the carriage body cannot be shielded after the top cover assembly is folded.

The invention discloses welding reinforcement equipment for a reinforcement cage. The welding reinforcement equipment comprises an assembly sleeve, an outer-layer ring seat and an inner-layer ring seat which are concentrically arranged. And the two groups of outer-layer ring seats are slidably mounted on the inner side of the assembly sleeve and are symmetrically arranged on the two sides of the inner-layer ring seat. And a distance adjusting assembly for adjusting the distance between the outer-layer ring seats is also arranged. And a plurality of groups of outer supporting assemblies and inner supporting assemblies are also assembled, are distributed in an annular array and are used for supporting and positioning longitudinal bars of the reinforcement cage. And an outer folding and unfolding assembly and an inner folding and unfolding assembly are further arranged in a matched mode and are in linkage with the outer supporting assembly and the inner supporting assembly, the folding and unfolding postures of all the supporting assemblies can be synchronously adjusted, and the stability of the reinforcement cage is ensured. The bending assembly is installed at one end of the assembling sleeve and used for bending stirrups of the reinforcement cage and surrounding the peripheries of longitudinal bars, and the welding equipment is arranged at the bending assembly and conducts welding reinforcement on the longitudinal bars and the stirrups. The problems that a traditional reinforcement cage is low in welding efficiency and unstable in quality are solved, and the structural stability and the welding quality of the reinforcement cage are guaranteed.

This invention discloses an immersive marine biodiversity experience device in the field of experience equipment technology, comprising: a frame, a seat mounted on the frame, a detector mounted on the seat, a retraction assembly at the top of the frame, a first flexible connector mounted on the retraction assembly, and an experience component at the end of the first flexible connector. The experience component includes VR glasses, audio equipment, and a recognition device. This application achieves automated retraction and deployment of the experience component by setting a human presence detector on the experience device to monitor in real time whether the seat is in use. When a person is detected on the seat, the retraction assembly is controlled to release the first flexible connector, causing the experience component to descend. When the detector detects no one on the seat, the retraction assembly is controlled to retract the first flexible connector, causing the experience component to rise. This significantly reduces the risk of physical damage to the device due to improper human operation and extends its service life.

The invention relates to an automatic folding and unfolding device for an unmanned aerial vehicle. The automatic folding and unfolding device comprises a case, a bottom plate, a translation driving mechanism, a supporting mechanism and an unlocking mechanism, the bottom plate is slidably arranged in the box body; the translation driving mechanism is arranged in the box body; the supporting mechanism is arranged on the bottom plate and comprises supporting blocks, a clamping frame and a clamping plate, the supporting blocks and the clamping frame are arranged at intervals, the clamping plate is elastically connected with the clamping frame, a clamping groove used for fixing a pair of arms of the unmanned aerial vehicle is formed between the clamping plate and the clamping frame, and the other pair of arms are naturally placed on the supporting blocks arranged at intervals; the unlocking mechanism is arranged on the bottom plate and comprises a pull rope and a driving assembly used for driving the pull rope to move, one end of the pull rope is connected to the driving assembly, the other end of the pull rope is connected to the clamping plate, and when the pull rope moves, the clamping plate can be driven to move so that the clamping groove can be expanded or shrunk to adapt to four-rotor unmanned aerial vehicles of various specifications with different arms. Through the integrated design, the device can achieve automatic folding and unfolding of the unmanned aerial vehicle, manual intervention is reduced, and the working efficiency is improved.

The utility model discloses a hoisting device for a horizontal shaft heading machine, which comprises a base and a hoisting mechanism, a mounting groove is arranged at the top of the base, a rotating platform is arranged in the mounting groove, the rotating platform is rotatably connected to the base, a telescopic arm is mounted on the base, the hoisting mechanism is mounted at the telescopic end of the telescopic arm, and a first oil cylinder is mounted on the telescopic arm. The telescopic end of the first oil cylinder is fixedly connected to the telescopic end of the telescopic arm through a connecting block, and the two ends of the second oil cylinder are hinged to the rotating platform and the lower end of the telescopic arm through hinges respectively. The hoisting device for the horizontal shaft heading machine has remarkable beneficial effects. Firstly, by arranging the rotating platform and the telescopic arm, multi-direction adjustment of the hoisting mechanism is achieved. The rotating platform can freely rotate on the base, the rotating platform can achieve accurate angle adjustment through the first rotating shaft and the first gear transmission system, and the flexibility and efficiency of hoisting operation are improved.

The invention discloses a portable shallow water depth finder, and belongs to the technical field of shallow water depth finders, the portable shallow water depth finder comprises a shell with two side walls provided with openings, the inner walls of the two sides of the shell are rotatably provided with first rotating shafts, a winding roller is fixed between the two first rotating shafts, a telescopic cable rack is fixed in the shell, and the telescopic cable rack is fixed in the shell. A cable is wound on the winding roller, one end of the cable penetrates through the cable rack to be connected with a probe, a placing rack is installed on the top wall of the shell and used for placing a host, and the other end of the cable penetrates through the shell to be connected with the host; according to the invention, automatic take-up and pay-off of the cable and automatic telescoping of the cable rack are realized, the probe can conveniently stretch into water for measurement, a user can complete the measurement work only through single-person operation, the convenience of measurement is greatly improved, and because the cable does not need to be held manually, the stability of the probe during measurement is ensured, and the measurement error caused by manual holding is effectively avoided.

The utility model discloses a lithium battery formation negative pressure suction nozzle electrolyte dripping collecting device which comprises a roller shutter collecting box, a front fixing piece is arranged at the upper end of the roller shutter collecting box, roller shutter cloth is arranged in the roller shutter collecting box, a rear fixing piece is arranged on the outer side of the roller shutter collecting box, and the rear fixing piece is connected with the roller shutter collecting box. The front fixing piece is fixedly connected with the rear fixing piece, a sliding rod is fixedly connected between the front fixing piece and the rear fixing piece, a sliding block is connected to the sliding rod in a sliding mode, and the lower end of the sliding block is fixedly connected with the outer edge of the rolling curtain cloth. Compared with the prior art, corrosion of the electrolyte to the probe and equipment can be reduced, the service life of the probe and the equipment can be prolonged, meanwhile, the structure is simple, the occupied space is small, the roller shutter curtain cloth is convenient to store, automatic curtain winding and unwinding can be achieved, the roller shutter curtain cloth can be conveniently additionally installed in the produced equipment, the installation requirement is low, and the use cost and the later maintenance cost are reduced.

The embodiments of the present invention provide an automatic cable winding and unwinding device and a cable loading vehicle, which relate to the field of coal mine production. The automatic cable winding and unwinding device includes a cable reel, a support assembly, a rotation drive assembly and a retracting assembly; the support assembly includes a support cylinder and a support member, the support member is connected to the cable reel and is used to be rotationally connected to the body of the cable loading vehicle, the support cylinder is transmission-connected to the cable reel, used to drive the cable reel and the support member to rotate relative to the body, and is used to be installed on the body of the cable loading vehicle; the rotation drive assembly is installed on the support member and is transmission-connected to the cable reel, used to drive the cable reel to rotate, and the cable reel is used to wind and unwind the cable; the retracting assembly is spaced apart from the cable reel, used to be installed on the body, and used to retract and unwind the cable. The above-mentioned automatic cable winding and unwinding device and cable loading vehicle can realize automatic winding and unwinding of the cable, which is convenient for arranging the cables.

The invention relates to the technical field of under-pressure water supply pipeline auxiliary detection equipment, and provides a take-up and pay-off cable guide device which comprises a shell, a supporting plate assembly, a driving wheel, a driven wheel assembly and a guide wheel assembly. A driving part is arranged in the shell; the supporting plate assembly comprises a first supporting plate and a second supporting plate, and a mounting gap is formed between the first supporting plate and the second supporting plate; the driving wheel is connected with the driving component; the driven wheel assembly is fixedly arranged on the supporting plate assembly, and the multiple driven wheels are arranged on the periphery of the driving wheel; the guide wheel assembly is arranged between the first supporting plate and the second supporting plate and used for guiding the cable to enter the cable passing channel. According to the cable take-up and pay-off device, automatic take-up and pay-off of a cable can be rapidly and stably achieved through cooperation of the driven wheel and the driving wheel, the labor intensity of workers is reduced, the driving wheel, the driven wheel assembly and the guide wheel assembly are all arranged on the first supporting plate and located in the installation gap, the overall occupied size of the device is small, and the application scene is enriched.

The utility model relates to the technical field of welding, and particularly discloses a welding machine container. The welding machine container comprises a steel structure rack and is characterized in that a left power distribution cabinet and a right power distribution cabinet are symmetrically mounted on the left side and the right side of the upper layer of the steel structure rack respectively; a transformer box is arranged between the left power distribution cabinet and the right power distribution cabinet; three sets of guide grooves penetrating through the bottom plate front and back are symmetrically formed in the bottom plate, a pair of welding machine fixing supports is installed in each set of guide grooves in a sliding mode, and a welding machine is installed on the pair of welding machine fixing supports. A main power line winding and unwinding device is arranged on the upper portion of the top cover, and a motor is arranged at one end of the main power line winding and unwinding device. The main power line winding and unwinding device is arranged at the top of the box body, automatic winding and unwinding of a main power line can be achieved, meanwhile, the main power line is clamped and fixed twice, and the reliability of electrical connection is ensured; segmented electric welding wire pulling is adopted, the electric welding wires in the box body are connected, only the electric welding wires outside the box body need to be connected during welding operation, and use in a construction site is facilitated.

The invention discloses a portable shallow water depth sounder, belonging to the technical field of shallow water depth sounders, comprising a shell with open sides, first rotating shafts are rotatably installed on the inner walls on both sides of the shell, a winding roller is fixed between the two first rotating shafts, a retractable cable rack is fixed inside the shell, a cable is wound on the winding roller, one end of the cable passes through the cable rack and is connected to a probe, a placement rack is installed on the top wall of the shell for placing a host, and the other end of the cable passes through the shell and is connected to the host; the invention realizes automatic retraction and extension of the cable rack, which facilitates the probe to be extended into the water for measurement, and the user only needs one person to complete the measurement work, which greatly improves the convenience of measurement, and since there is no need to manually hold the cable, the stability of the probe during measurement is ensured, and the measurement error caused by manual holding is effectively avoided.

The utility model relates to a double ink duct pay-off device for large space construction, it includes ink duct box and water absorption sponge, the ink duct box whole presents oval, both ends are set up as conical, just the ink duct box is divided into two detachable parts of upper and lower, namely ink duct cover and ink duct groove body, the inside of ink duct groove body is provided with the clamping groove, water absorption sponge fills in the ink duct groove body, the water absorption sponge is provided with the vacancy site that matches with the space of clamping groove and ink duct line, and the ink duct line penetrates water absorption sponge and both ends respectively from the both ends of ink duct box stretches out, the utility model discloses through the unique double ink duct design, has realized the automatic take -up and dip of ink duct line and dip ink function, has improved pay-off efficiency greatly.