A clogging clearing device for a smelting furnace lance

Abstract

The utility model discloses a smelting furnace spray gun clearing and unplugging device belongs to spray gun clearing and unplugging field. The unplugging device includes: drilling tool, drill bit is inserted into the inside abutting stopper of spray gun, and driving device passes through drill rod and drives drill bit to impact the stopper of spray gun, and drill bit is the ladder drill bit, and drill bit sets up at least two chip grooves, and chip groove penetrates the drill body of drill bit, and the maximum diameter of drill bit is equal to the diameter of the cavity of spray gun, and the diameter of drill rod is less than the diameter of the cavity of spray gun, the one end of connecting pipe is connected with spray gun, and the other end is connected with drilling tool, and connecting pipe includes valve and air inlet, and air inlet is located at the side of valve near spray gun, and inert gas is passed into the inside of spray gun through air inlet, and inert gas flows through chip groove and reaches the stoppage place of spray gun, to avoid the backflow of molten pool material into spray gun after spray gun clearing and unplugging. The technical problem that molten slag in smelting reduction furnace can backflow to the inside of spray gun when spray gun clearing and unplugging is completed is solved.

Description

Technical Field

[0001] This utility model relates to the field of spray gun unclogging technology, and in particular to a spray gun unclogging device for a smelting furnace. Background Technology

[0002] In the molten reduction furnace, there is a material spray gun that extends directly into the slag and iron and sprays solid material into the molten pool. Because the material spray gun operates at a high temperature, a liquid cooling pipe is installed inside the gun housing to prevent the gun from deforming due to high temperature. The temperature of the gun is maintained by circulating the cooling medium.

[0003] When the furnace is shut down for maintenance, once the protective nitrogen gas stops blowing, the molten slag in the molten pool will flow back into the spray gun. Since there is a cooling cycle inside the spray gun shell, the molten slag that flows back in will cool down and solidify, causing the spray gun to become blocked and thus unable to spray materials smoothly.

[0004] In existing technologies, high-pressure gas is usually injected into the blockage. High-pressure gas can solve the blockage caused by powder accumulation, but it cannot solve the blockage caused by slag blockage formed by solidified slag. Therefore, drilling tools are usually used to clear the blockage of the spray gun. However, at the moment the spray gun is cleared, slag in the molten reduction furnace may flow back into the spray gun. To address this issue, a smelting furnace spray gun clearing device is proposed to solve the technical problem that slag in the molten reduction furnace may flow back into the spray gun when the spray gun is cleared. Utility Model Content

[0005] The main purpose of this utility model is to provide a smelting furnace lance unblocking device, which aims to solve the technical problem that molten slag may backflow into the lance during the unblocking process after the lance is blocked by slag.

[0006] To achieve the above objectives, the present invention proposes a spray gun unclogging device, which is applied to the spray gun of a molten reduction furnace. The unclogging device includes:

[0007] The drilling tool includes a drill bit, a drill rod, and a drive device. The drill bit extends into the interior of the spray gun to abut against the blockage. The drive device drives the drill bit through the drill rod to impact the blockage in the spray gun. The drill bit is a stepped drill bit with at least two chip removal grooves that penetrate the drill body. The maximum diameter of the drill bit is equal to the cavity diameter of the spray gun, and the diameter of the drill rod is smaller than the cavity diameter of the spray gun.

[0008] A connecting pipe is provided, with one end connected to the spray gun and the other end connected to the drill bit. The connecting pipe includes a valve and an air inlet. The air inlet is located on the side of the valve near the spray gun. Inert gas is introduced into the spray gun through the air inlet. The inert gas flows through the chip removal groove to the blockage of the spray gun, so as to prevent the molten pool material from flowing back into the spray gun after the blockage is cleared.

[0009] Optionally, in one embodiment of the present invention, the drill bit further includes a drill housing, which is connected to the connecting pipe. The drill housing includes a sealing element disposed inside it, and the drill rod extends into the drill housing and abuts against the sealing element to form a seal.

[0010] Optionally, in one embodiment of the present invention, multiple drill rods are provided, and the drill rods are detachably connected to the drill bit, the drill rods themselves, and the drive device.

[0011] Optionally, in one embodiment of the present invention, a locking pin is further included. The drill rod has a first locking hole, and the drill housing has a second locking hole at one end near the driving device. The locking pin passes through the first locking hole and the second locking hole to lock the drill rod, and the tail section of the locked drill rod protrudes from the drill housing.

[0012] Optionally, in one embodiment of the present invention, a drill bit connector is further included. The drill rod includes a rod body and a drill plug. The rod body and the drill plug are detachably connected. The drill plug and the drill bit connector are detachably connected. The drill rod is connected to the driving device through the drill bit connector and the drill plug.

[0013] Optionally, in one embodiment of the present invention, the drill rods are connected by threads and the rod body is connected to the drill plug by threads.

[0014] Optionally, in one embodiment of the present invention, the sealing element is a sealing sleeve, the core of the sealing sleeve has a through cavity for the drill rod to pass through, and the sealing sleeve is threadedly connected to the drill housing.

[0015] Optionally, in one embodiment of the present invention, the connecting pipe is connected to the drill bit and the spray gun via a flange.

[0016] Optionally, in one embodiment of the present invention, the chip removal groove is a spiral groove.

[0017] Optionally, in one embodiment of this utility model, the valve is a ball valve.

[0018] Compared with the prior art, the present invention can achieve at least the following beneficial effects.

[0019] When the drive unit rotates the stepped drill bit via the drill rod to impact the blockage, the chip removal groove discharges broken debris out of the spray gun, simultaneously forming an annular gap around the outer wall of the drill rod. Inert gas enters the spray gun through the inlet, flows along the annular gap through the chip removal groove to the blockage area, continuously forming a gas barrier higher than the pressure of the molten pool during the clearing process. When the blockage is completely cleared, the valve closes, but inert gas continues to flow through the inlet to maintain positive pressure inside the spray gun, preventing molten slag from flowing back into the molten pool.

[0020] This solution, through the coordinated design of the drill bit structure and the gas channel, utilizes the chip discharge groove during the crushing stage to achieve the dual functions of chip discharge and gas diversion, thus solving the technical problem of molten slag backflowing into the spray gun during slag crushing. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a smelting furnace spray gun unclogging device according to the present invention;

[0023] Figure 2 This is a schematic diagram of the drill shell part in a smelting furnace spray gun unclogging device of the present invention;

[0024] Figure 3 This is a schematic diagram of the drill rod structure in a smelting furnace spray gun unclogging device of this utility model;

[0025] Figure 4 This is a schematic diagram of the drill bit structure in a smelting furnace spray gun unclogging device of this utility model.

[0026] Explanation of icon numbers:

[0027] 100. Drilling tool; 110. Drill bit; 111. Chip removal groove; 120. Drill rod; 121. Rod body; 122. Drill plug; 130. Drive unit; 140. Drill casing; 141. Seal; 200. Connecting pipe; 210. Valve; 220. Air inlet; 310. Locking pin; 320. First locking hole; 330. Second locking hole; 340. Drill bit connector;

[0028] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0033] In existing technologies, during maintenance shutdowns of molten reduction furnace nozzles (where nozzles refer to material nozzles in this text), molten slag from the molten pool can easily backflow into the nozzle. The cooling cycle causes the slag to solidify, forming slag blocks that clog the nozzle. Traditional high-pressure gas unclogging methods cannot break up the solidified slag blocks, while mechanical drilling tools pose a risk of secondary slag backflow after unclogging, rendering the nozzle unusable.

[0034] To address the aforementioned issues, particularly the challenges posed by the high hardness of the slag blockage and the resulting backflow due to pressure imbalance after unblocking, a device is needed that can effectively break up the solidified material while simultaneously forming a pressure barrier.

[0035] Reference Figures 1-4This application proposes a clogging device for a molten reduction furnace nozzle, comprising a drill bit 100 and a connecting pipe 200. The drill bit 100 includes a stepped drill bit 110, a drill rod 120, and a drive unit 130. The maximum diameter of the drill bit 110 is equal to the diameter of the nozzle cavity, while the diameter of the drill rod 120 is smaller than the cavity diameter. The drill bit 110 has a chip removal groove 111 extending through the drill body. The connecting pipe 200 is equipped with a valve 210 and an air inlet 220 located on the nozzle side of the valve 210, through which inert gas is introduced.

[0036] The stepped drill bit 110 refers to a drill bit 110 with multiple cutting surfaces, specifically employing a progressively increasing diameter structure to break up slag in layers through cutting edges of different diameters. The chip removal groove 111 refers to a groove extending along the axial direction of the drill bit 110, specifically machined into a straight or spiral shape, used to remove chips and form a gas passage. The air inlet 220 of the connecting pipe 200 refers to the gas inlet being located between the valve 210 and the spray gun, ensuring that gas preferentially enters the spray gun chamber.

[0037] Specifically, when the drive unit 130 drives the stepped drill bit 110 to rotate and impact the blockage via the drill rod 120, the chip removal groove 111 discharges the broken debris out of the spray gun, simultaneously forming an annular gap around the outer wall of the drill rod 120. Inert gas enters the spray gun through the air inlet 220 and flows along the annular gap through the chip removal groove 111 to reach the blockage area, continuously forming a gas barrier higher than the pressure of the molten pool during the unblocking process. When the blockage is completely cleared, after the valve 210 is closed, the inert gas continues to maintain positive pressure inside the spray gun through the air inlet 220, preventing molten slag from flowing back into the molten pool.

[0038] This solution, through the coordinated design of the drill bit 110 structure and the gas channel, utilizes the chip discharge groove 111 during the crushing stage to achieve the dual functions of chip discharge and gas diversion, thus solving the technical problem of molten slag backflowing into the spray gun after the slag is crushed.

[0039] Through the above technical solution, this application establishes an inert gas pressure barrier while clearing blockages in the spray gun, effectively preventing molten slag from flowing back into the molten pool. The size matching between the stepped drill bit 110 and the spray gun cavity avoids equipment damage, the gas passage formed by the chip removal groove 111 and the annular gap ensures uniform pressure distribution, and the layout of the valve 210 and the air inlet 220 enables continuous control of gas supply and pressure maintenance.

[0040] Preferably, the chip removal groove 111 is a spiral groove. A spiral groove refers to a groove structure extending along a spiral trajectory on the surface of the drill bit 110, specifically achieved by machining continuous spiral grooves on the surface of the drill bit 110. The spiral angle of the spiral groove can be 30° to 60°. This structure generates centrifugal force when the drill bit 110 rotates, pushing the chips outward along the spiral trajectory, while simultaneously extending the flow time of the inert gas in the chip removal path. Specifically, when the drill bit 110 impacts the blockage, the continuous spiral groove of the spiral groove, through rotational motion, transports the broken solidified iron filings outward along the spiral path. The extension direction of the spiral groove is consistent with the rotation direction of the drill bit 110, causing the chips to be thrown against the groove wall under centrifugal force and continuously move outward. After entering from the air inlet 220, the inert gas flows along the channel formed by the spiral groove, creating a swirling effect in the spiral path, enhancing the chip-carrying capacity. The spiral groove extends longer than the straight groove, increasing the contact time between the gas and debris, and the gas pressure forms a stable barrier in the blockage area.

[0041] In some specific embodiments, the helix angle of the spiral groove is 45 degrees, and the pitch is 0.8 times the diameter of the drill bit 110. The depth of the spiral groove can be 5% to 10% of the diameter of the drill bit 110, and the groove width can be 8% to 12% of the diameter of the drill bit 110. The starting end of the spiral groove is located behind the top cutting edge of the drill bit 110, and the ending end extends to the connection of the drill rod 120.

[0042] Compared to existing technologies, traditional straight-line channels have a linear chip removal path, where chips move unidirectionally only due to gravity or gas propulsion, easily accumulating within the channel and causing secondary blockages. In contrast, spiral channels actively guide chips along a spiral trajectory through centrifugal force generated by rotation, reducing the contact area between chips and the channel wall and lowering motion resistance. Simultaneously, the swirling gas path created by the spiral channel results in a more uniform distribution of inert gas, and the stability of the gas pressure barrier is superior to that of the unidirectional gas flow in straight-line channels.

[0043] Through the above technical solution, this application solves the problem of molten slag backflow in the molten pool caused by insufficient chip removal efficiency during the spray gun unclogging process. The spiral groove structure reduces chip retention through an active chip removal mechanism, avoiding blockage of the chip removal channel; the swirling gas path prolongs the gas action time, maintains the internal pressure balance of the spray gun, and effectively prevents molten slag backflow after unclogging is completed.

[0044] Furthermore, the drill string 100 also includes a drill housing 140, which is connected to the connecting pipe 200. The drill housing 140 includes a sealing element 141 disposed inside it, and the drill rod 120 extends into the drill housing 140 and abuts against the sealing element 141 to form a seal.

[0045] The drill housing 140 refers to the structural component that surrounds the drill rod 120 and provides external connection. Specifically, it can be implemented using a cylindrical structure made of metal, used for fixed connection with the connecting pipe 200 and providing installation space for the seal 141. The seal 141 refers to the element used to seal the gap between the drill housing 140 and the drill rod 120. The core of the sealing sleeve has a through cavity for the drill rod 120 to pass through, and it is connected to the inner wall of the drill housing 140 by threads to achieve detachable replacement.

[0046] Specifically, the drill housing 140 is fixedly connected to the connecting pipe 200 via a flange or threads. The drill rod 120 extends from one end of the drill housing 140 and passes through the cavity of the seal 141. The seal 141 is compressed by the inner wall of the drill housing 140 and tightly adheres to the surface of the drill rod 120, forming a dynamic seal. When the drill rod 120 undergoes impact motion, the contact surface between the seal 141 and the drill rod 120 remains sealed. After the inert gas enters from the air inlet 220 of the connecting pipe 200, it is restricted to flow within the cavity between the drill housing 140 and the spray gun, and cannot leak through the gap between the drill rod 120 and the drill housing 140. Thus, the inert gas can be concentrated at the point of blockage in the spray gun, preventing the pressure barrier from failing due to gas leakage.

[0047] Furthermore, multiple drill rods 120 are provided, and the drill rods 120 and drill bit 110, the drill rods 120 and the drive device 130 are all detachably connected.

[0048] Among them, multiple drill rods 120 refer to the split structure that decomposes the drill string 100 into multiple independent rods 121, which can be achieved by using a threaded connection. The length of the drill string 100 can be quickly adjusted by combining the segments to meet the operational needs of different blockage depths.

[0049] Specifically, the segmented design of the drill rod 120 allows for flexible adjustment of the total length of the drill string 100 based on the location of the blockage and the depth of the nozzle cavity. For example, when the blockage is shallow, only a single drill rod 120 needs to be installed, while for deep blockages, multiple drill rods 120 can be stacked to extend the working range. Standardized interfaces are used between the drill rod 120 and the drill bit 110, adjacent drill rods 120, and the drive unit 130. For example, uniform threads or grooves are provided at both ends of the rod body 121, allowing direct connection between any two sections of the drill rod 120 or between the drill rod 120 and the drive unit 130. When a drill rod 120 becomes worn or deformed, only the faulty section needs to be disassembled and replaced with a new drill rod 120, without needing to replace the entire drill string 100, thereby reducing maintenance costs and downtime.

[0050] Furthermore, the unblocking device also includes a locking pin 310, a first locking hole 320 is opened on the drill rod 120, a second locking hole 330 is opened on the end of the drill housing 140 near the drive device 130, the locking pin 310 passes through the first locking hole 320 and the second locking hole 330 to lock the drill rod 120, and the tail section of the locked drill rod 120 protrudes from the drill housing 140.

[0051] The locking pin 310 is a rigid connecting component used to limit the axial displacement of the drill rod 120. It can be implemented using an "L"-shaped metal pin, the diameter of which matches the diameter of the locking hole. The first locking hole 320 is a positioning hole that penetrates radially along the drill rod 120. It can be formed at the end of the drill rod 120 by machining, with its axis perpendicular to the axis of the drill rod 120. The second locking hole 330 is a positioning hole that penetrates radially along the drill housing 140. It can be coaxially arranged with the first locking hole 320 at the end of the drill housing 140, its diameter forming a clearance fit with the diameter of the locking pin 310. The term "drill rod 120 protruding from drill housing 140" refers to the fact that the end of drill rod 120 extends to the outside of drill housing 140 to form an operating section. Before the spray gun unblocking operation, the drill rod 120, which has already entered the cavity, is fixed by locking pin 310, and the drill rod 120 is reconnected at its tail to ensure that the overall length of drill rod 120 meets the working requirements. After the spray gun unblocking operation is completed, when the drill rod 120 is pulled out, the drill rod 120 is fixed by locking pin 310 to facilitate the disassembly of drill rod 120.

[0052] Furthermore, a drill bit connector 340 is proposed. The drill rod 120 includes a rod body 121 and a drill plug 122. The rod body 121 and the drill plug 122 are detachably connected. The drill plug 122 is detachably connected to the drill bit connector 340. The drill rod 120 is connected to the drive device 130 through the drill bit connector 340 and the drill plug 122.

[0053] The drill bit connector 340 is a standardized connector used to transmit power between the drive unit 130 and the drill rod 120. Specifically, it can be implemented using a metal sleeve with a threaded or snap-fit ​​structure, which allows the drive unit 130 and the drill rod 120 to form a separable rigid connection. The drill plug 122 is a transition component used to connect the rod body 121 and the drill bit connector 340. Specifically, it can be implemented using a metal connector with internal threads, which allows the rod body 121 to form a detachable axial fixation with the drive interface. The rod body 121 is the columnar structure constituting the main body of the drill rod 120. Specifically, it can be implemented using a segmented steel rod, a design that allows the length of the drill rod 120 to be adjusted according to the required operating depth.

[0054] Specifically, the drill bit 110 connector and the drill plug 122 are rigidly connected to enable the drive device 130 to transmit power from the drill rod 120 to the drill bit 110. The drill plug 122 and the drill rod 120 are threadedly connected. During the assembly of the screw rod, since the diameter of the screw rod is smaller than the diameter of the spray gun cavity, the screw rod can easily slide into the spray gun cavity. The drill plug 122 has a limiting end, the volume of which is larger than the cavity of the spray gun. The limiting end is locked outside the spray gun cavity to prevent the drill rod 120 from slipping out. When the drill rod 120 extends into the spray gun cavity, the locking pin 310 is used to limit the drill rod 120. The drill plug 122 serves as a redundant protection structure for the locking pin 310.

[0055] Furthermore, the drill rods 120 and the rod body 121 and the drill plug 122 are connected by threads to enable quick connection and disassembly between the drill rods 120 and between the rod body 121 and the drill plug 122.

[0056] Furthermore, the seal 141 in the unblocking device is a sealing sleeve, the core of which has a through cavity for the drill rod 120 to pass through, and the sealing sleeve is threadedly connected to the drill housing 140.

[0057] The sealing sleeve refers to an annular sealing component with an axial through hole, and the through cavity refers to a through channel opened along the axial direction of the sealing sleeve, the diameter of which is slightly smaller than the diameter of the drill pipe 120 to achieve an interference fit. The threaded connection refers to the fixing of the outer wall of the sealing sleeve and the inner wall of the drill housing 140 through a threaded pair, specifically using metric fine thread or tapered pipe thread, and generating axial preload by tightening the thread.

[0058] Specifically, during the reciprocating impact motion of the drill pipe 120, the through cavity of the sealing sleeve allows the drill pipe 120 to maintain axial freedom, while ensuring that the inner wall of the through cavity always adheres to the surface of the drill pipe 120, forming a dynamic sealing interface. The threaded connection between the sealing sleeve and the drill housing 140 controls the axial position of the sealing sleeve through the screw-in depth, thus rigidly fixing the sealing sleeve to the inner wall of the drill housing 140.

[0059] Furthermore, the connecting pipe 200 is connected to the drill bit 100 and to the spray gun via flanges.

[0060] Flange connections refer to the connection between pipes or equipment through an annular disc-shaped structure with a sealing surface. Specifically, this can be achieved by using a flange with bolt holes and a sealing gasket for locking. The sealing surface of the flange can be machined into a flat, raised face, or tongue and groove surface. The sealing gasket can be a spiral wound gasket or a graphite composite gasket to meet the sealing requirements under high temperature and high pressure conditions. The flange connection uses bolt preload to tighten the sealing gasket, forming a rigid connection interface. This ensures structural stability even when subjected to 100° impact vibration from drilling tools, preventing gas leakage due to loosening at the connection point caused by vibration.

[0061] Furthermore, valve 210 is a ball valve, which is opened and closed by rotating the valve stem. This structure can withstand high temperature and high pressure environments when closed, and prevents the reverse flow of fluid.

[0062] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A device for unclogging a smelting furnace spray gun, applied to the spray gun of a molten reduction furnace, characterized in that, The unblocking device includes: The drilling tool includes a drill bit, a drill rod, and a drive device. The drill bit extends into the interior of the spray gun to abut against the blockage. The drive device drives the drill bit through the drill rod to impact the blockage in the spray gun. The drill bit is a stepped drill bit with at least two chip removal grooves that penetrate the drill body. The maximum diameter of the drill bit is equal to the cavity diameter of the spray gun, and the diameter of the drill rod is smaller than the cavity diameter of the spray gun. A connecting pipe is provided, with one end connected to the spray gun and the other end connected to the drill bit. The connecting pipe includes a valve and an air inlet. The air inlet is located on the side of the valve near the spray gun. Inert gas is introduced into the spray gun through the air inlet. The inert gas flows through the chip removal groove to the blockage of the spray gun, so as to prevent the molten pool material from flowing back into the spray gun after the blockage is cleared.

2. The spray gun unclogging device as described in claim 1, characterized in that, The drill bit also includes a drill housing, which is connected to the connecting pipe. The drill housing includes a sealing element disposed inside it, and the drill rod extends into the drill housing and abuts against the sealing element to form a seal.

3. The spray gun unclogging device as described in claim 2, characterized in that, The drill rod is provided in multiple ways, and the drill rod and the drill bit, the drill rod and the drive device are detachably connected.

4. The spray gun unclogging device as described in claim 3, characterized in that, It also includes a locking pin, the drill rod has a first locking hole, the drill housing has a second locking hole at one end near the drive device, the locking pin passes through the first locking hole and the second locking hole to lock the drill rod, and the tail section of the locked drill rod protrudes from the drill housing.

5. The spray gun unclogging device as described in claim 3, characterized in that, It also includes a drill bit connector, the drill rod includes a rod body and a drill plug, the rod body and the drill plug are detachably connected, the drill plug and the drill bit connector are detachably connected, and the drill rod is connected to the drive device through the drill bit connector and the drill plug.

6. The spray gun unclogging device as described in claim 5, characterized in that, The drill rods are connected by threads, as are the rod body and the drill plug.

7. The spray gun unclogging device as described in claim 2, characterized in that, The sealing element is a sealing sleeve, the core of which has a through cavity for the drill rod to pass through, and the sealing sleeve is threadedly connected to the drill housing.

8. The spray gun unclogging device as described in claim 1, characterized in that, The connecting pipe is connected to the drill bit and to the spray gun via flanges.

9. The spray gun unclogging device as described in claim 1, characterized in that, The chip removal groove is a spiral groove.

10. The spray gun unclogging device as described in claim 1, characterized in that, The valve is a ball valve.

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