189 results about "Suction catheter" patented technology

The invention belongs to the technical field of medical instruments, and particularly relates to an integrated plugging balloon suction catheter. The suction catheter comprises a woven mesh tube, the near end of the woven mesh tube is connected with a handle, and the far end opening of the woven mesh tube is used for being close to the thrombus position; the balloon is arranged on the periphery of the woven mesh tube in a sleeving mode, and the balloon is arranged at the far end of the woven mesh tube; the handle comprises a catheter suction port and a filling port, the catheter suction port is communicated with the far port of the woven mesh tube, and the filling port is communicated with the balloon. The aspiration catheter can effectively reduce the occurrence rate of thrombus escape, so that the risk of far-end embolism is reduced, and good prognosis of a patient is achieved through efficient thrombus extraction; and the extra cost of using other instruments can be reduced, so that the comprehensive cost of the operation is reduced, the thrombus extraction success rate is greatly improved, manpower and material resources are saved, and a patient is benefited.

An adjusting device comprises a fixing assembly arranged at the right end of a sputum suction tube and used for being connected with the sputum suction tube, and an adjusting assembly used for controlling the adjusting assembly and a cleaning tube to communicate with the sputum suction tube is arranged in the fixing assembly. A limiting assembly used for limiting the adjusting assembly is arranged in the fixing assembly. Therefore, when medicine adding operation needs to be carried out, medical staff only need to inject medicine into the medicine adding connector, and then the inner core is rotated to enable the medicine adding connector to be communicated with the inner channel of the sputum suction tube. At the moment, the medicine is inhaled into the respiratory tract along with the sputum, so that accurate administration of the medicine is realized; through the double functions of precise dosing and negative pressure suction, the closed sputum suction tube dosing structure can improve the treatment effect; due to the adoption of the closed design, the sputum suction tube dosing structure can effectively avoid the risks of sputum leakage and cross infection.

The invention provides a suction catheter. The suction catheter comprises a macromolecule tube and a supporting tube arranged in the wall of the macromolecule tube. The supporting pipe comprises a first supporting ring and a plurality of supporting rods, and the supporting rods extend in the direction parallel to the longitudinal center axis of the suction catheter and are arranged on the outer side of the first supporting ring at intervals in the circumferential direction. The supporting rod comprises a near-end section, a middle section and a far-end section which are sequentially connected, the near-end section and the middle section are located on the near-end side of the first supporting ring, the far-end section is located on the far-end side of the first supporting ring, and the rigidity of the far-end section or the near-end section is larger than that of the middle section. When the far end of the aspiration catheter is blocked by thrombus, the middle section of the supporting rod is bent inwards, the far end section of the supporting rod tilts outwards, and therefore the far end of the supporting rod expands, and the thrombus originally blocked at the far end of the aspiration catheter can smoothly enter the aspiration catheter.

The invention relates to the field of medical instruments, in particular to a suction catheter with a shock wave thrombus breaking function, which comprises a shock wave catheter, a suction tube and a discharge mechanism, and a shock wave guide pipe is arranged in the suction pipe. According to the invention, charges are introduced into the annular electrode and the cylindrical electrode by starting the discharge mechanism, a large amount of charges are accumulated at the two ends of the positive electrode and the negative electrode to generate a strong electric field, neutral particles in a medium between the electrodes are ionized into plasma under the action of the strong electric field, and a discharge phenomenon occurs; rapid temperature change of plasmas and surrounding media generated in the discharging process causes rapid volume expansion and contraction of the surrounding media, the violent movement of particles in the media can generate pressure sound waves and transmit the pressure sound waves outwards through the media, and when the movement speed of the particles exceeds the propagation speed of the sound waves in the media, shock waves can be generated, so that the pressure sound waves are generated. When the shock wave catheter extends into the blood vessel of the human body, calcified plaques in the blood vessel can be efficiently crushed without damaging the endometrium of the blood vessel.

An aspiration catheter includes a body having a proximal end and an opposite distal tip, with a lumen extending therethrough in a longitudinal direction from the proximal end to the distal tip. The aspiration catheter further includes a stabilizing structural member that stabilizes the body relative to the inner wall of the blood vessel to minimize movement and / or radial expansion of the distal tip of the body when subjected to aspiration that would otherwise potentially damage the inner wall of the blood vessel.

The utility model discloses a negative pressure suction device for taking a dislocated intraocular lens. The negative pressure suction device mainly comprises a suction catheter, a catheter seat, a butt joint seat, an extension tube, a negative pressure generation device and a negative pressure control device, wherein the combined structure of the suction catheter and the catheter seat can be realized by directly adopting a 22G venous indwelling needle catheter, the combined structure of the suction catheter and the catheter seat is connected to the extension tube through the butt joint seat, the combined structure of the negative pressure generation device and the negative pressure control device can be realized by directly adopting an ultrasonic emulsification and vitreous body cutting machine and a matched pedal controller, and the extension tube is in butt joint with a negative pressure port of the extension tube. The negative pressure is adjusted through the pedal controller, the intraocular lens dislocated to the vitreous cavity is attracted to the pupil area, and damage to the retina in an operation is avoided. The device has the advantages of simplicity and convenience in operation, controllable negative pressure, small trauma and the like, is suitable for minimally invasive extraction or reduction of a dislocated intraocular lens in clinic, and is wide in adaptability.

The invention provides a suction catheter. The suction catheter comprises a macromolecule tube and a supporting tube arranged in the wall of the macromolecule tube. The supporting pipe comprises a first supporting ring, a plurality of supporting rods and at least one tightening ring; the multiple supporting rods extend in the direction parallel to the longitudinal central axis of the suction catheter and are arranged on the outer side of the first supporting ring at intervals in the circumferential direction. The tightening ring is located on the near end side of the first supporting ring and arranged outside the multiple supporting rods in a sleeving mode. In a natural state, the tightening ring tends to contract inwards in the radial direction. When the far end of the suction catheter is blocked by thrombus, the part, sleeved with the tightening ring, of the supporting rod bends and deforms inwards under the action of the tightening ring and negative pressure. The supporting rod rotates with the first supporting ring as a fulcrum, so that the far-end section of the supporting rod tilts outwards, the far-end end of the supporting pipe expands, and thrombus abutting against the far-end end of the suction catheter can smoothly enter the suction catheter.

The invention provides a vascular occlusion suction system and laser ablation equipment, and belongs to the technical field of medical instruments.The suction system comprises a suction catheter, a collecting device, a negative pressure generating device, a flow sensing device and a control device.The first end of the suction catheter acts on the application position of a target object; an inlet of the collecting device is communicated with the second end of the suction catheter to form a first channel of the suction channel, the negative pressure generating device is communicated with an outlet of the collecting device to form a second channel of the suction channel, the flow sensing device is used for monitoring the real-time flow of the suction channel, and the control device is configured to respond to gear selection operation. The initial suction gear is determined, the negative pressure generation device is controlled to work at the initial suction gear, and the gear adjustment prompt instruction is output according to the real-time flow, so that an operator can conveniently carry out gear adjustment on the negative pressure generation device subsequently or directly carry out automatic gear adjustment on the negative pressure generation device; and the capacity of intelligently adjusting the suction negative pressure of the suction system is effectively improved.

The application discloses a kind of thrombus suction control method and thrombus suction device, and thrombus suction device includes suction assembly, suction assembly includes the shell with pressure cavity, piston rod and suction catheter, thrombus suction device also includes the motor of piston rod movement and the controller connected with motor, control method is: suction catheter is positioned to the blood vessel without thrombus, make motor operate according to speed V0, calibrate the pressure value B in pressure cavity under normal blood condition;Suction catheter is positioned to the blood vessel with thrombus, make motor operate according to speed V1, V1≤V0, make dynamic pressure value A0 in pressure cavity: when A0≤B, make motor keep speed V1 operation;When A0>B, make motor increase from speed V1: when B<A0≤C, make motor increase to speed V2 operation;When C<A0≤D, make motor increase to speed V3 operation;When D<A0≤E, make motor increase to speed V4 operation.The control method thrombus removal efficiency is high, and blood loss can be reduced.

The mask compatible with the snorting catheter comprises a mask body, a nose clip is arranged on the top of the inner side face of the mask body, the left side and the right side of the upper portion of the inner side face of the mask body are respectively provided with an inner side hasp, the upper side edges of the two inner side hasps are connected with the mask body, and mucilage glue is arranged on the two inner side hasps respectively. The left side and the right side of the lower portion of the outer side face of the mask body are each provided with a hook-and-loop fastener, each hook-and-loop fastener comprises a hook-and-loop fastener loop face and a hook-and-loop fastener hook face, one end of each hook-and-loop fastener loop face is connected with the mask body, and the other end of each hook-and-loop fastener loop face is connected with the corresponding hook-and-loop fastener hook face. The mask body is fixed to the snorting catheter through the two inner side hasps and the two hook-and-loop fasteners, the mask can be easily worn while the snorting catheter is worn, the snorting catheter and the mask can be more conveniently worn at the same time, ear tensioning belts of a traditional mask are omitted, the face of a patient is simplified, and the wearing comfort of the patient is improved.

The invention relates to the technical field of medical instruments, in particular to a catheter device for taking out blood vessel thrombus, which comprises a connector and a suction catheter body, one end of the suction catheter body is connected with a suction port of the connector, and a liquid suction pipe orifice communicated with an inner cavity is fixedly mounted on the side surface of the connector. A guide wire is inserted into the inner side of the suction catheter body in a penetrating mode and penetrates through an inner cavity of the connector. The thrombus aspiration catheter has the advantages that the aspiration catheter body is slowly inserted into a blood vessel, the aspiration opening of the aspiration catheter body is moved to the thrombus, the thrombus can be aspirated, the thrombus can be aspirated, the thrombus can be aspirated, the thrombus can be aspirated, the thrombus can be aspirated, the thrombus can be aspirated, the thrombus can be aspirated, the thrombus can be aspirated, the thrombus can be aspirated, and the thrombus can be aspirated. The guide wire is driven by the adjusting mechanism to extend forwards along the inner cavity of the suction catheter body, the guide wire firstly drives the telescopic mechanism to slide forwards, and the guide wire continues to move close to the suction opening of the suction catheter body.

An intubation assembly operable as both a tracheal tube and a suction catheter. The intubation assembly may include an adapter operable to couple to a suction hose, and the adapter may be removably coupled to the tracheal tube.

An endotracheal lung suction system includes an endotracheal tube defining a tube lumen, a suction assembly, and an inner suction catheter. The endotracheal tube comprises an inflation connector and an implantation balloon adjacent the distal tube end and fluidically connected to the inflation connection and through which the balloon inflates. The suction assembly comprises a proximal valve and a distal endotracheal tube connector fluidically connected to an interior of the tube lumen. The inner suction catheter passes through and slides within the suction assembly, the endotracheal tube connector, and through the tube lumen to extend slidably out from and back into the distal tube end. The inner suction catheter comprises a distal, inflatable, hollow, inner-suction- catheter securing device and a catheter body defining a main lumen extending through the inner suction catheter and a catheter-securing inflation lumen extending through the inner suction catheter parallel to the main lumen.

The utility model provides an intracranial balloon suction catheter, and belongs to the technical field of medical instrument intervention equipment. The catheter comprises a catheter body used for sucking a bolt block, a tubular elastic supporting element is arranged at the far end of the catheter body, the elastic supporting element can be supported in the radial direction and can contract in the axial direction, the outer side of the elastic supporting element is wrapped with a balloon, the near end of the balloon is arranged at the far end of the catheter body, and the far end of the balloon is fixedly connected with the far end of the elastic supporting element. The suction nozzle is used for forming a suction port so as to directly extract the plug block; the suction catheter is used for solving the technical problems that an existing suction catheter is large in radial size of the far end and poor in compliance, so that the in-place performance is poor, and the treatment effect is poor.

This application relates to the field of medical device technology and discloses an automatic cleaning and waste liquid recovery device for a closed suction catheter. The device includes a housing, a connecting assembly, and a recovery assembly. The interior of the housing is divided into a storage chamber and a waste liquid recovery chamber by a fixedly connected partition. A sealing door is hinged to the outside of the waste liquid recovery chamber. The connecting assembly is mounted on the housing and is used to connect to the end of the closed suction catheter. The recovery assembly is located inside the waste liquid recovery chamber. Through the cooperation of a fixed heater, a triangular prism heater, and a driving component, the waste liquid recovery bag is automatically melted and sealed, achieving a good sealing effect. The recovery bag remains within a sealed space throughout the process, with no exposure during waste liquid collection, sealing, and disassembly, completely avoiding environmental and personnel pollution caused by waste liquid leakage and splashing. Simultaneously, when idle, the triangular prism heater can be attached to a heat-conducting plate to transfer heat to the flushing fluid in the storage chamber, preheating the flushing fluid and improving patient comfort.

The utility model discloses a double-cavity suction catheter and a pulmonary alveolar lavage device comprising the same. The catheter comprises a water injection pipe and a water suction pipe. A plurality of spray holes are formed in the circumferential surface of the water injection pipe, the far-end end surface of the water injection pipe is connected with the circumferential surface of the water suction pipe, the far-end end part of the water suction pipe is closer to the far-end side than the far-end end part of the water injection pipe, and the outer diameter of the far-end of the water suction pipe is smaller than that of the far-end of the water injection pipe. The lavage device can recover lavage fluid in the deeper airway and avoid retention of the lavage fluid in the body, and the lavage fluid in the trachea can be recovered through the water suction pipe while the lavage fluid is injected into the trachea through the water injection pipe for lavage.

The utility model relates to the technical field of medical instruments, and discloses a breathing connector and a closed type sputum suction catheter comprising the breathing connector, the breathing connector comprises a breathing cavity, an isolation cavity, an isolation assembly arranged in the isolation cavity and an external connection cavity, the isolation cavity is provided with a communication hole, and the isolation cavity is provided with a through hole. The communicating holes are communicated with the external cavity and the breathing cavity respectively, and the communicating or isolating state between the communicating holes can be switched by operating the isolating assembly; the breathing connector comprises an operation feedback mechanism, and when the communicating hole is switched to be in the communicating or isolating state, the operation feedback mechanism can provide operation feedback. The operation feedback mechanism comprises a fixed buckle part and an active feedback part, and the operation feedback mechanism provides operation feedback through connection of the fixed buckle part and the active feedback part. According to the utility model, the suction catheter can be easily and safely connected and isolated, and the isolation component can be prevented from being accidentally opened or closed.

The present invention provides an aspiration catheter for interventional surgery, relating to the field of medical device technology, and comprising a catheter body and a protective assembly; the protective assembly comprises a control wire that passes through the catheter body and a protective head disposed at the distal end of the control wire; the protective head is made of silicone, and the proximal periphery of the protective head is provided with a protrusion that protrudes toward the proximal end, for covering the distal sidewall of the catheter body; the control wire and the central portion of the protective head jointly define a cavity for the guide wire to pass through; during the process of conveying the catheter body forward along a blood vessel, the protective head is covered over the distal end of the catheter body. By providing a control wire and a protective head, the present invention allows the protective head to cover the distal end of the catheter body during the conveyance of the catheter body, effectively preventing the catheter body from getting stuck in the bifurcated vessel wall when passing through the bifurcated vessel, causing vascular damage.

Described here are devices, systems, and methods for applying pulsed or modulated electric fields to tissue. In some variations, a method of treating a target tissue may comprise advancing a pulsed electric field device and a visualization device to the target tissue of a patient. The pulsed electric field device may comprise an elongate body and an expandable member coupled to the elongate body. A suction catheter may be advanced from a lumen of the visualization device. Suction may be applied to the portion of the target tissue through the one or more fluid openings of the expandable member using the suction catheter. A pulsed waveform may be delivered to an electrode array of the pulsed electric field device to generate a pulsed or modulated electric field thereby treating the target tissue.

The present invention relates to a thrombus aspiration catheter, comprising: an aspiration tube extending along an axis and having an aspiration port at a distal end; the guide wire tube is connected to the far-end side of the suction tube, the near-end side of the guide wire tube is fixed to the periphery of the suction tube, the part, overlapped with the suction tube, of the guide wire tube forms a connecting section, and the part, extending towards the far end, of the guide wire tube forms a suspended section; the flexural rigidity of the suction section and the flexural rigidity of the guide wire tube are both smaller than the flexural rigidity of the main body section; or the inner wall of the suction tube is provided with a sliding groove extending to the far end along the axis, the far end of the sliding groove is provided with a containing section, and the far end of the connecting rod is fixed to the near end of the guide wire tube. Through deformation of the guide wire tube or embedding of the guide wire tube into the tube wall of the suction tube, the guide wire can be used for guiding to quickly reach the preset position, the sectional area of the suction cavity of the suction tube is not damaged, and the suction efficiency and the pushing performance of the suction tube can be improved at the same time.

The invention discloses a closed wireless visible self-cleaning sputum suction catheter, and relates to the technical field of medical instruments, the closed wireless visible self-cleaning sputum suction catheter comprises a sputum suction catheter body, a trachea connector and a suction catheter connector, one end of the sputum suction catheter body is communicated with the suction catheter connector, the other end of the sputum suction catheter body is assembled and connected with the trachea connector, and the suction catheter connector is communicated with a negative pressure valve; a breathing machine connector is arranged on one side of the air pipe connector, a sputum suction opening is formed in the end, facing the air pipe connector, of the sputum suction pipe body, an isolating valve is arranged in the sputum suction pipe body, a flushing pipeline is arranged in the sputum suction pipe body, one end of the flushing pipeline extends to the sputum suction opening, and the other end of the flushing pipeline penetrates through the suction catheter connector and extends outside. The end face of the flushing pipeline is provided with a flushing assembly in a communicating mode, and the end, provided with the sputum suction opening, of the sputum suction pipe body is provided with a micro camera and a wireless module. The novel sputum suction tube integrates visualization, self-cleaning anti-blocking and wireless image transmission, and the application of the novel sputum suction tube covers the scenes of clinical medicine, emergency care, intensive care and the like.

A suction catheter system is described with a suction nozzle that can extend from a guide catheter of the like. The suction nozzle can be positioned by tracking the suction nozzle through a vessel while moving a proximal portion of the suction extension within the lumen of the guide catheter. A suction lumen extends from the proximal end of the guide catheter through at least part of the guide catheter central lumen and through the suction tip. Desirable suction flow can be established using the guide lumen to facilitate the suction. Also, a delivery catheter is described with an elastic tip that can track closely over a guidewire. The elastic tip of the delivery catheter can be expanded to provide for the delivery of medical devices past the tip.

The utility model discloses a suction catheter, an intervention device and a thrombectomy training system.The suction catheter comprises a suction pipe and a filtering part, the suction pipe comprises a pipe body, a suction channel, a suction inlet and a suction outlet are formed in the pipe body, and the suction inlet and the suction outlet communicate with the suction channel; the filtering piece is arranged in the suction channel and is positioned between the suction inlet and the suction outlet; in the intervention state, the suction inlet is located at the preset suction position, the suction outlet is located at the preset liquid discharging position, and the pipe body penetrates through the middle transition area from the preset suction position and extends to the preset liquid discharging position.

To provide a suction catheter system with a suction extension part.SOLUTION: A suction extension part is interfaced with a guide catheter to form a continuous suction lumen extending through a portion of the guide catheter and through the suction extension part. The suction extension part can be positioned by tracking the suction nozzle through a vessel while moving a proximal portion of the suction extension part within a lumen of the guide catheter. The suction extension part can include a connecting section 400 with a non-circular cross section for interfacing with the inner lumen of an engagement section of the guide catheter. A tubular body of the guide catheter can have a reduced diameter distal section that can be useful to restrain the movement of the suction extension part. Proximal fittings attached to the guide catheter can facilitate safe removal of the catheter system from the patient by allowing for the removal of some or all of an annular extension part of the suction extension part from the guide catheter behind a hemostatic seal.SELECTED DRAWING: Figure 21

The application provides a suction catheter, which comprises a catheter, a handle connected to a proximal end of the catheter, and a head end connected to a distal end of the catheter, wherein the head end comprises a protective cover and a rotary grinding head arranged inside the protective cover. A cable is arranged in the catheter, extends to a distal end of the head end, and is fixedly connected with the rotary grinding head, and the protective cover is provided with a hollow structure. The cable is configured to drive the rotary grinding head to rotate and break a thrombus entering the protective cover. In the technical scheme, the catheter can be inserted into a blood vessel of a human body, and the handle is used for holding by an operator. The hollow structure of the protective cover allows the thrombus to pass through, and then the rotary grinding head driven to rotate by the cable breaks the thrombus. The size of the thrombus broken by the rotary grinding head is small, so that the broken thrombus is not easy to be blocked when being sucked out, and the rotary grinding head is arranged in the protective cover, so that the blood vessel is not easy to be damaged.

The invention discloses a self-adaptive aspiration system and method based on lumen state recognition, and relates to the field of thrombus aspiration, and the system comprises an air pressure sensor and an aspiration controller. The air pressure sensor is arranged in the suction catheter and used for collecting the air pressure value of the suction catheter in real time when the catheter cavity is sucked. The suction controller is connected with the air pressure sensor and the suction part and used for recognizing the state of the thrombus in the lumen according to the air pressure value of the suction catheter and adjusting the running state of the suction part according to the state of the thrombus in the lumen so that the thrombus in the lumen can be sucked through the suction catheter. The thrombus in the lumen can be sucked in a self-adaptive mode according to the state of the thrombus in the lumen, the thrombus suction efficiency is improved, the problem that when pure blood exists in the lumen, continuous suction causes a large amount of blood loss is avoided, and the thrombus suction safety is improved.

The invention discloses a system for removing clogs in blood vessels, which relates to the technical field of medical instruments and comprises a flexible driving shaft, a rotating body, a suction catheter and a motor module, the rotating body is provided with a far end face, a near end face, an axis, a first side face and a second side face. The far end of the flexible driving shaft is coaxially and fixedly connected to the near end face of the rotating body, and the near end of the flexible driving shaft is connected to the motor module; the suction catheter is axially arranged on the outer side of the rotating body in a sleeving mode, and a fluid inlet is formed in the far end of the suction catheter; the distance between the first side face of the rotating body and the axis is larger than the distance between the second side face of the rotating body and the axis, an included angle is formed between the second side face of the rotating body and the generatrix of the rotating body, and the rotating body rotates in the suction guide pipe to excite vortex. A negative pressure cavity with the pressure lower than that of the working condition environment is formed in the far-end area of the rotating body. The device can crush and remove clogging substances in blood vessels, and the clogging substance removing effect is good.

This invention provides a thrombus aspiration catheter with a variable distal inner diameter, belonging to the field of interventional surgical instrument technology. The catheter includes an interventional catheter, an operating handle, and a collection component. The interventional catheter is used to move along the blood vessel to approach the thrombus location. The operating handle is located at the proximal end of the interventional catheter to provide suction force. The collection component is located at the distal end of the interventional catheter, with its proximal end communicating with the interventional catheter and its distal end open and adjustable in diameter. When the interventional catheter moves along the blood vessel to approach the thrombus, the diameter of the collection component is in a contracted state and not larger than the diameter of the interventional catheter. After the collection component reaches its position, it expands to increase its distal diameter for overall thrombus aspiration. This invention primarily addresses the technical problems of existing small-diameter thrombus aspiration catheters, which suffer from insufficient suction force, require repeated aspiration, and are prone to thrombus escape, while large-diameter catheters have poor permeability and are difficult to reach the lesion site.

The present application relates to the field of assist devices and provides a left ventricular flexible assist device, wherein a catheter support of the device is arranged in a reflux catheter; a first opening is arranged at the top of the catheter support, a second opening is arranged at the bottom of the catheter support, and the side of the catheter support is a hollow structure; a trileaflet valve is fixedly connected to the inner side of the catheter support; a third opening is arranged at the top of the suction catheter, a fourth opening is arranged at the bottom of the reflux catheter, a fifth opening is arranged at the top of the reflux catheter, the third opening passes through the fourth opening and the second opening, and is fixedly connected to the bottom of the trileaflet valve; the support valve is arranged between the catheter support and the suction catheter; a blood discharge hole is arranged on the side of the reflux catheter, and a suction hole is arranged on the side of the suction catheter. The device provided by the present application can aspirate blood from the left ventricle during systole while avoiding the accidental aspiration of blood from the ascending aorta out of the body, and discharge blood into the ascending aorta during diastole while avoiding the accidental discharge of blood into the left ventricle.

The invention discloses coating equipment for a coating of a medical suction catheter, and relates to the technical field of coating equipment. The coating equipment for the medical suction catheter comprises a cabinet and a machining mechanism, the machining mechanism comprises a linear driver and a flat plate, the flat plate is fixedly connected to the output end of the linear driver, a sliding strip is slidably installed on the side of the top of the flat plate, an air cylinder is fixedly installed at one end of the top of the flat plate, and a coating assembly is installed on the surface of the flat plate; the coating assembly comprises a spraying main machine and a fixed protective cover, the spraying main machine is installed on the side of the surface of the flat plate, the fixed protective cover is fixedly connected to the surface of the flat plate and is away from the side of the spraying main machine, nozzles are fixedly installed on the top of the fixed protective cover and the top of the movable protective cover, and a discharging port of the spraying main machine communicates with a round pipe; the purpose of uniform coating is achieved, uniform-speed spraying is achieved, protection is achieved, coating aliasing is not prone to occurring, the coating quality is high, and safety and reliability are achieved.