An intermittent electro-explosive spraying device for the inner wall of a circulating spray tank.

Abstract

This invention discloses an intermittent electro-explosive spraying device for the inner wall of a circulating spraying groove, relating to the field of electro-explosive spraying technology. It solves the technical problems of existing electro-explosive spraying devices, such as uncontrollable wire electro-explosion length, large fluctuations in spray area, and the excessive length, limited number of grooves, insufficient cooling, and short lifespan caused by axially arranged spray grooves. The intermittent electro-explosive spraying device for the inner wall of a circulating spraying groove includes a grounding shell, spray grooves, an insulating rod, and a carrier wire. The end faces of the grounding shell have a first through hole and a second through hole, and a third through hole is opened on either side. Multiple spray grooves are arranged in two layers inside the grounding shell, with the openings of the concave grooves facing the third through hole. A discharge electrode is disposed inside the insulating rod. Grounding electrodes and discharge electrodes are disposed on both sides of the third through hole. The insulating rod passes through the second through hole and the lower concave groove, with the discharge electrode positioned on the side of the third through hole away from the first through hole.

Description

Technical Field

[0001] This invention relates to the field of electro-explosive spraying technology, and more specifically, to an intermittent electro-explosive spraying device for the inner wall of a circulating spray tank. Background Technology

[0002] Pipeline transportation is the primary mode of oil and gas storage and transportation in my country. Oil and gas pipelines operate under complex conditions for extended periods, making them prone to internal wall corrosion and thinning, which affects operational safety and lifespan. Due to structural limitations such as small pipeline diameters and long distances, traditional surface treatment equipment is often unsuitable. Electro-explosive spraying technology integrates the heat source and drive, eliminating the need for external equipment. Its small spray spacing allows for deep coating application into the inner walls of long-distance, small-diameter pipelines, providing an ideal solution for corrosion and wear resistance of oil and gas pipeline inner walls.

[0003] Chinese Patent Application No. 202210545041.3 discloses an electro-explosive spraying device for the inner wall of a pipe, employing a working mode of continuous wire feeding, continuous energization, high voltage followed by grounding, and single-slot electro-explosion. This structure is prone to problems such as premature electro-explosion of the metal wire before it has fully approached the grounding electrode, or delayed electro-explosion occurring even after it has approached the grounding electrode and has moved forward a certain distance with the wire drawing mechanism. This results in inconsistent wire explosion lengths, ineffective electro-explosions, material waste, and large fluctuations in the sprayed area. Furthermore, continuous operation in a single slot leads to rapid heat accumulation, easily causing fatigue and cracking. To address these issues, Chinese Patent Application No. 202411049211.4 discloses an electro-explosive spraying device for the inner wall of a pipe, employing a multi-segment spraying tank structure. After multiple electro-explosions in a single segment, the operation mode switches to the next segment. However, this does not significantly improve the heat accumulation problem in the spraying tank. Moreover, the multi-segment spraying tanks are arranged in a straight line axially, resulting in a long spray gun, few tanks, and limited improvement in the lifespan of the spraying tanks. Meanwhile, the device still uses a continuous feeding of metal wire, which first approaches the high-voltage electrode and then the grounding electrode, and the stability of the metal wire's electro-explosion length is not improved. Based on this, Chinese Patent Application No. 202422038155.6 discloses a continuous electro-explosion spraying device for the inner wall of a pipe, which uses a wire clamping mechanism to clamp the carrier wire and integrates it with a multi-segment spraying groove. This solution improves the control of the metal wire's electro-explosion length to some extent, but the carrier wire and the multi-segment spraying groove are prone to relative sliding, and the electrode approach method of first high voltage and then grounding still exists, so problems such as unstable control of the explosion length still exist. The continued use of the axial straight arrangement of the spraying groove makes the spray gun long and the number of grooves limited, and the service life and equipment compactness are still not ideal. Summary of the Invention

[0004] The purpose of this invention is to provide an intermittent electro-explosive spraying device for the inner wall of a circulating spraying channel, which solves the technical problems of uncontrollable wire electro-explosion length, large fluctuations in spraying area, and the excessively long spray gun, insufficient number of channels, inadequate cooling, and short lifespan caused by the axially arranged spray channels in existing electro-explosive spraying devices. In view of this, the invention achieves this through the following solution.

[0005] This invention provides an intermittent electro-explosive spraying device for the inner wall of a circulating spray tank, comprising: A grounding housing has a first through hole and a second through hole on opposite end faces; a third through hole is provided on either side of the grounding housing, and a grounding electrode is provided on the side of the third through hole closer to the first through hole; The spray groove has a concave groove; a plurality of the spray grooves are arranged in two layers inside the grounding housing, with the opening of the concave groove facing the side of the third through hole; An insulating rod is provided with a discharge electrode inside; a lower spray groove is positioned close to a third through hole; the insulating rod passes through the second through hole and the lower concave groove, and the discharge electrode is positioned on the side of the third through hole away from the first through hole; there is a voltage difference between the grounding electrode and the discharge electrode. The carrying wire passes through the first through hole, the lower concave groove, and the second through hole to drive the metal wire to move inside the concave groove and bring the metal wire close to the grounding electrode and the discharge electrode inside either concave groove. The upper and lower spray channels move in a clockwise / counterclockwise direction. After a single electric explosion, the adjacent spray channel switches to the third through hole position for the next electric explosion.

[0006] Furthermore, the intermittent electro-explosion spraying device for the inner wall of the circulating spraying groove of the present invention also includes an upward lifting component and a downward pressing component; after a single electro-explosion, the downward pressing component moves the upper spraying groove at one end of the grounding housing to the lower position, and the upward lifting component moves the lower spraying groove at the other end of the grounding housing to the upper position.

[0007] Furthermore, in the intermittent electro-explosive spraying device for the inner wall of the circulating spraying groove of the present invention, the lifting assembly includes a first push-pull structure and an lifting rod; the lifting rod has an L-shaped structure; a first connecting rod extends from one end of the grounding housing; the first push-pull structure is fixedly installed; the bend of the lifting rod is movably connected to the first connecting rod; one end of the first push-pull structure near the lifting rod is movably connected to one side of the lifting rod; the first push-pull structure pushes the lifting rod to extend the other side of the lifting rod into the interior of the grounding housing, and moves the lower spraying groove to the upper position.

[0008] Furthermore, in the intermittent electro-explosive spraying device for the inner wall of the circulating spraying tank of the present invention, the pressing component includes a second push-pull structure and a pressing rod; The structure of the pressure rod includes an L-shape; a second connecting rod extends from the other end of the grounding housing; the second push-pull structure is fixedly installed; the bend of the pressure rod is movably connected to the second connecting rod; one end of the second push-pull structure near the pressure rod is movably connected to one side of the pressure rod; the second push-pull structure pushes the pressure rod to extend the other side of the pressure rod into the grounding housing, and moves the upper spray groove to the lower position.

[0009] Furthermore, in the intermittent electro-explosive spraying device for the inner wall of the circulating spray tank of the present invention, the first push-pull structure includes a first push-pull electromagnet; the second push-pull structure includes a second push-pull electromagnet.

[0010] Furthermore, the intermittent electro-explosive spraying device for the inner wall of the circulating spraying groove of the present invention also includes a driving mechanism; the driving mechanism drives the upper and lower spraying grooves to move in a clockwise / counterclockwise direction.

[0011] Furthermore, in the intermittent electro-explosive spraying device for the inner wall of the circulating spraying groove of the present invention, after the driving mechanism drives any spraying groove to move a single spraying groove distance, it returns to the starting position and drives the next spraying groove to move a single spraying groove distance.

[0012] Furthermore, in the intermittent electro-explosive spraying device for the inner wall of the circulating spraying tank of the present invention, the driving mechanism includes a drive gear set, a first transmission rod, and a second transmission rod; One end of the first transmission rod is provided with a gear groove, and a limit rod is provided on the side of the first transmission rod away from the gear groove; The drive gear set is disposed on the side of the grounding housing near the first through hole; A first limiting groove is provided at one end of the second through hole of the grounding shell; The first transmission rod is connected to the drive gear set through the gear groove, and the limiting rod extends into the grounding housing through the first limiting groove; The second transmission rod is provided with a gear groove, which is located on the side of the grounding housing near the first through hole. The gear groove of the second transmission rod is connected to the drive gear set. During the rotation of the drive gear set, the second transmission rod is driven to push the lower spraying groove to move one position.

[0013] Furthermore, in the intermittent electro-explosive spraying device for the inner wall of the circulating spray tank of the present invention, a second limiting groove is provided at one end of the first through hole of the grounding shell; During the rotation of the drive gear set, the second transmission rod is driven to extend through the second limiting groove into the grounding housing, pushing the lower spraying groove to move one station.

[0014] Furthermore, the intermittent electro-explosive spraying device for the inner wall of the circulating spraying groove of the present invention also includes a belt assembly; gear grooves are provided at both ends of the first transmission rod, and the belt assembly is connected to the gear groove of the first transmission rod on one side of the second through hole of the grounding housing; the carrier belt extends from the second through hole of the grounding housing and wraps around the belt assembly; the belt assembly is configured to rotate only along the stretching direction of the carrier belt.

[0015] Compared with the prior art, in the intermittent electro-explosive spraying device for the inner wall of the circulating spraying groove of the present invention, the grounding shell is used to provide structural support, accommodate the spraying groove and the carrier belt, and achieve the function of grounding, forming part of the electro-explosive circuit; the spraying groove is used to provide a closed space for the metal wire to undergo electro-explosion and to constrain the spraying particles to be sprayed directionally to the inner wall of the pipe; the insulating rod is used to support and position the discharge electrode and keep the discharge electrode and the grounding shell insulated; the carrier belt is used to intermittently transport the metal wire into the spraying groove, realizing automatic feeding of the metal wire; the pressing component is used to move the upper spraying groove at one end of the grounding shell to the lower position; the lifting component is used to move the lower spraying groove at the other end of the grounding shell to the upper position; the driving mechanism is used to drive the first transmission rod and the second transmission rod, driving the upper and lower spraying grooves to move in a clockwise / counterclockwise direction, while driving the pulling belt assembly to rotate; the pulling belt assembly is used to pull the carrier belt to move intermittently in a directional manner along its stretching direction. In the above-described technical solution of the present invention, by arranging multiple spray slots in upper and lower layers inside the grounding housing, the axial length of the spray gun no longer increases linearly with the number of spray slots. Only the length of a single spray slot is needed to arrange multiple spray slots. During automatic spraying, the drive mechanism drives the pull belt assembly to operate. The pull belt assembly pulls the carrier wire through the first through hole on the end face of the grounding housing and into the concave groove of the lower spray slot. The carrier wire then extends from the second through hole and wraps around the pull belt assembly. With the movement of the pull belt assembly, the metal wire moves directionally within the concave groove. When the metal wire moves to the position of the third through hole, it sequentially approaches the grounding electrode located on the side of the third through hole closer to the first through hole and the discharge electrode located on the side of the third through hole farther from the first through hole. At this time, the drive mechanism... The drive mechanism stops operating, and the feeding of the belt assembly and the carrier belt with metal wire stops synchronously. The discharge electrode is energized to realize the intermittent supply and positioning discharge of the metal wire. Due to the voltage difference between the grounding electrode and the discharge electrode, the air is broken down by high voltage, and the current is introduced into the metal wire to form a power supply circuit, causing the metal wire to explode electrically. The spray particles generated by the electric explosion are sprayed onto the inner wall of the pipe through the third through hole, completing one spraying. Further, after a single electric explosion, the drive mechanism drives the first transmission rod and the second transmission rod to move the upper and lower spray grooves as a whole in a clockwise or counterclockwise direction. The pressing component and the lifting component move the spray grooves at both ends of the grounding shell to realize the interlayer switching, so that the previously adjacent spray grooves are switched to the position of the third through hole, ready for the next electric explosion. Throughout the intermittent electro-explosion process, the metal wire first approaches the grounding electrode and then the discharge electrode, employing an intermittent positioning electro-explosion working mode. This differs from existing technologies where the metal wire approaches the discharge electrode first and then the grounding electrode, as well as the continuous wire feeding and constant energization mode. This ensures that the electro-explosion length of the metal wire is equal for each discharge, improving the stability and uniformity of the electro-explosion spraying operation. Simultaneously, because multiple spray slots alternately enter the working position, each spray slot receives sufficient cooling time between two electro-explosions, effectively suppressing heat accumulation and preventing cracking and failure of the spray slot due to high temperature.Based on the above-mentioned technical solution of the present invention, by adopting the sequence of bringing the metal wire close to the grounding electrode first and then close to the discharge electrode, and by using intermittent feeding and positioning electric explosion method, stable control of the metal wire electric explosion length is achieved. By arranging the spray grooves in two layers, the length of the spray gun is shortened, the number of spray grooves is greatly increased, and the cyclic alternating working mode is adopted to ensure that the spray grooves can be fully cooled after each electric explosion, so as to avoid cracking of the spray grooves. This solves the technical problems of uncontrollable metal wire electric explosion length, large fluctuation of spray area, and the excessively long spray gun, few spray grooves, insufficient cooling, and short life caused by the axially arranged spray grooves in the existing electric explosion spraying device. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the structure of an intermittent electro-explosive spraying device for the inner wall of a circulating spray tank according to the present invention; Figure 2 In this invention Figure 1 A cross-sectional view of point AA in the diagram; Figure 3 In this invention Figure 2 A magnified view of a portion of point C in the middle; Figure 4 In this invention Figure 1 Schematic diagram of the cross section at point BB; Figure 5 This is a schematic diagram of the spray groove in this invention; Figure 6 This is a schematic diagram of the grounding shell in this invention; Figure 7 This is a schematic diagram of the overall structure of the spray groove in the second working position in this invention; Figure 8 This is a schematic diagram of the overall structure of the spray groove in the third working position in this invention; Figure 9 This is a schematic diagram of the overall structure of the spray groove in the fourth working position in this invention; Figure label: 1-Grounding housing; 101-First through hole; 102-Second through hole; 103-Third through hole; 104-First connecting rod; 105-Second connecting rod; 106-First limiting groove; 107-Second limiting groove; 2-Spraying groove; 201-Concave groove; 3-Insulating rod; 4-Carrying ribbon; 5-Metal wire; 6-Lifting assembly; 601-First push-pull structure; 602-Lifting rod; 7-Pressing assembly; 701-Second push-pull structure; 702-Pressing rod; 8-Drive mechanism; 801-Drive gear set; 802-First transmission rod; 803-Second transmission rod; 9-Pulling assembly; 901-Take-up pulley; 902-Take-up transmission shaft; 903-One-way bearing; 904-Transmission gear; 10-Grounding electrode; 11-Discharge electrode; 12-Guide wheel; 13-First fixed position; 14-Second fixed position. Detailed Implementation

[0017] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0018] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0020] Due to the structural characteristics of narrow inner diameter and large axial length of pipelines, traditional surface treatment equipment is difficult to adapt to pipeline operation scenarios, resulting in limitations in construction flexibility and coating preparation effects. Electro-explosive spraying technology, with its unique advantage of integrating heat source and driving force, eliminates the need for external auxiliary equipment, significantly shortening the spraying interval. This allows the spraying device to smoothly penetrate long-distance, small-diameter pipelines to complete coating preparation, providing an ideal technical path for corrosion and wear-resistant treatment of the inner walls of oil and gas pipelines. Early existing technologies employed continuous wire feeding, continuous energization, high-voltage followed by grounding, and single-slot electro-explosion methods. These methods resulted in uncontrollable wire explosion lengths, leading to ineffective explosions, material waste, and large fluctuations in sprayed area. Furthermore, poor heat dissipation in individual spray slots made them prone to thermal fatigue cracking. While subsequent technologies have adopted multi-slot spray slots and integrated moving structures to improve service life and spraying accuracy, problems such as untimely slot switching, easy slippage of the carrier wire, and unstable wire explosion lengths remain. Additionally, the axially linear arrangement of the spray gun results in excessively long spray slots and a limited number of spray slots, leaving the overall short service life unresolved.

[0021] Please see Figures 1 to 9 To solve the above-mentioned technical problems, the present invention provides an intermittent electro-explosive spraying device for the inner wall of a circulating spraying tank, comprising a grounded housing 1, a spraying tank 2, an insulating rod 3, and a carrier wire 4; wherein: The grounding housing 1 has a first through hole 101 and a second through hole 102 on opposite end faces; a third through hole 103 is provided on either side of the grounding housing 1, and a grounding electrode 10 is provided on the side of the third through hole 103 closest to the first through hole 101; the spray groove 2 has a concave groove 201; multiple spray grooves 2 are arranged in two layers inside the grounding housing 1, with the opening of the concave groove 201 facing the third through hole 103; a discharge electrode 11 is provided inside the insulating rod 3; the lower spray groove 2 is positioned close to the third through hole 103; the insulating rod 3 passes through the second through hole 102 and the lower concave groove 201. 1. The discharge electrode 11 is positioned on the side of the third through hole 103 away from the first through hole 101; there is a voltage difference between the grounding electrode 10 and the discharge electrode 11; the carrier wire 4 passes through the first through hole 101, the lower concave groove 201 and the second through hole 102, and is used to drive the metal wire 5 to move inside the concave groove 201, and to bring the metal wire 5 close to the grounding electrode 10 and the discharge electrode 11 inside either concave groove 201; the upper and lower spray grooves 2 move in a clockwise / counterclockwise direction, and after a single electric explosion, the adjacent spray groove 2 switches to the position of the third through hole 103 for the next electric explosion.

[0022] In specific implementation: Based on the above-mentioned intermittent electro-explosive spraying device for the inner wall of the circulating spraying groove pipe of the present invention, in the initial state, multiple spraying grooves 2 are arranged in two layers inside the grounding housing 1, wherein the lower spraying groove 2 is set near the third through hole 103, the insulating rod 3 passes through the second through hole 102 on the end face of the grounding housing 1 and enters the concave groove 201 of the lower spraying groove 2, so that the discharge electrode 11 inside the insulating rod 3 is located on the side of the third through hole 103 away from the first through hole 101, and the grounding electrode 10 is set on the side of the third through hole 103 near the first through hole 101, forming a discharge gap between the grounding electrode 10 and the discharge electrode 11; when the electro-explosive spraying device is placed inside the pipe to be sprayed and the spraying operation begins, the carrier belt... 4. The wire 5 enters the concave groove 201 of the lower spray groove 2 through the first through hole 101 on the end face of the grounding shell 1, and drives the metal wire 5 on it to move along the concave groove 201 towards the second through hole 102. When the metal wire 5 moves to the position of the third through hole 103, it first approaches the grounding electrode 10 on the side closer to the first through hole 101, and then approaches the discharge electrode 11 on the side away from the first through hole 101. At this time, the grounding electrode 10 and the discharge electrode 11 form a power supply circuit through the metal wire 5, and a high-voltage pulse electric field is applied between the discharge electrode 11 and the grounding electrode 10, causing gas discharge breakdown in the gap between the electrode and the metal wire 5, and forming a momentary large current path. The current flows through the metal wire 5 and is heated by ohms to make it fast. A large amount of Joule heat is rapidly generated, and the metal wire 5 rapidly heats up, melts, and vaporizes from a solid state in a very short time. As energy continues to be injected, the metal vapor is further ionized to form high-temperature plasma, and finally, under the instantaneous release of high energy, a violent electric explosion occurs, atomizing to form high-purity micro-nano metal particles. The generated spray particles, constrained by the concave groove 201 of the spray tank 2, are directionally sprayed onto the inner wall of the pipe through the third through hole 103 on the side of the grounded shell 1, completing one electric explosion spraying. Further, after a single electric explosion, the upper and lower spray tanks 2 move as a whole one position in a clockwise or counterclockwise direction, so that the spray tank 2 originally aligned with the third through hole 103 moves out of the working position, and the adjacent spray tank 2 moves closer to the third through hole 103. After the device is moved into position, the pressing component 7 moves the upper spray groove 2 of one end of the grounding housing 1 to the lower position, while the lifting component 6 moves the lower spray groove 2 of the other end of the grounding housing 1 to the upper position, completing the repositioning of the spray groove 2 between the upper and lower layers. At this time, the previously adjacent spray groove 2 has been switched to the position of the third through hole 103, and re-establishes a discharge engagement with the grounding electrode 10 and the discharge electrode 11. While switching the spray groove 2, the carrier wire 4 continues to move forward, sending the next section of metal wire 5 into the concave groove 201 of the spray groove 2, repeating the above-mentioned electro-explosion process. During the above process, the grounding electrode 10 and the discharge electrode 11 both leave a gap with the top of the concave groove 201 of the spray groove 2, and the height of this gap is preferably 2~2.The length of the spray groove 2 is 5mm, and can be set according to the length of the third through hole 103 of the grounding housing 1. The third through hole 103 is the spray port during the electric explosion process. The length of the third through hole 103 is preferably 45~55mm, and the length of the spray groove 2 is preferably twice the length of the third through hole 103. The spray groove 2 is an insulator. The grounding housing 1 can be a grounding pipe, that is, it adopts a rectangular structure. The spray groove 2 can also adopt a rectangular structure. The side of the carrier wire 4 near the first through hole 101 can be guided by the guide wheel 12. The guide wheel 12 guides and tensions the carrier wire 4, so that the carrier wire 4 enters the first through hole 101 smoothly and accurately, avoiding the carrier wire 4 from deviating, wearing or jamming, and realizing automatic and stable electric explosion spraying. Figure 2 middle," HV "High Voltage Pulse Field" is a high voltage pulse electric field.

[0023] As can be seen from the structure and specific implementation process of the intermittent electro-explosive spraying device for the inner wall of the circulating spraying channel pipe of the present invention, in the intermittent electro-explosive spraying device for the inner wall of the circulating spraying channel pipe of the present invention, the grounding shell 1 is used to provide structural support, accommodate the spraying channel 2 and the carrier wire 4, and realize the grounding function to form part of the electro-explosive circuit; the spraying channel 2 is used to provide a closed space for the metal wire 5 to undergo electro-explosion, and to constrain the spraying particles to be sprayed directionally to the inner wall of the pipe; the insulating rod 3 is used to support and position the discharge electrode 11, and to keep the discharge electrode 11 insulated from the grounding shell 1; the carrier wire 4 is used to intermittently transport the metal wire 5 into the interior of the spraying channel 2, realizing the automatic feeding of the metal wire 5; in the above technical solution of the present invention, by arranging multiple spraying channels 2 in two layers inside the grounding shell 1, the axial length of the spray gun no longer increases linearly with the number of spraying channels 2, and multiple spraying channels 2 can be arranged with only the length of a single spraying channel 2, so that during automatic spraying operation... The carrier wire 4 passes through the first through hole 101 on the end face of the grounding housing 1 and enters the concave groove 201 of the lower spraying groove 2, driving the metal wire 5 to move within the concave groove 201. When the metal wire 5 moves to the position of the third through hole 103, it sequentially approaches the grounding electrode 10 located on the side of the third through hole 103 near the first through hole 101 and the discharge electrode 11 located on the side of the third through hole 103 away from the first through hole 101. Due to the voltage difference between the grounding electrode 10 and the discharge electrode 11, the air is broken down by high voltage, and a large instantaneous current is introduced into the metal wire 5 to form a power supply circuit, causing the metal wire 5 to undergo an electric explosion. The spray particles generated by the electric explosion are sprayed onto the inner wall of the pipe through the third through hole 103, completing one spraying operation. Further, after a single electric explosion, the upper and lower spraying grooves 2 move as a whole in a clockwise or counterclockwise direction, so that the previously adjacent spraying grooves 2 switch to the position of the third through hole 103, preparing for the next electric explosion. Throughout the entire electro-explosion process, the spray groove 2 slides against the inner wall of the grounding housing 1 with a loose fit and minimal frictional resistance. Even under conditions of thermal expansion or slight wear, no jamming will occur. During the entire electro-explosion process, when the carrier wire 4 pulls the metal wire 5 to the position of the third through hole 103, it sequentially approaches the grounding electrode 10 located on the side of the third through hole 103 near the first through hole 101 and the discharge electrode 11 located on the side of the third through hole 103 away from the first through hole 101. Then, the metal wire 5 stops supplying power, the discharge electrode 11 is energized, and the metal wire 5 undergoes an electro-explosion. This differs from the prior art in which the metal wire 5 approaches the discharge electrode 11 first and then the grounding electrode 10. This avoids the metal wire 5 being easily affected by ambient air temperature, humidity, and suspended particles during its journey towards the grounding electrode 10 after approaching the discharge electrode 11, which could lead to premature breakdown of the air by the high-voltage pulse electric field and an electro-explosion. Alternatively, it could result in an electro-explosion due to unstable contact conduction, causing the metal wire 5 to travel a certain distance before the electro-explosion occurs, making it difficult to guarantee the consistency of the electro-explosion length of the metal wire 5.This effectively prevents the metal wire 5 from exploding before it even approaches the grounding electrode 10, or from exploding after it has approached the grounding electrode 10 but with a delayed explosion. It ensures that the exploding length of the metal wire 5 is equal for each discharge, avoiding large fluctuations in the sprayed area. Simultaneously, because multiple spray slots 2 alternately enter the working position, each spray slot 2 receives sufficient cooling time between two exploding events, effectively suppressing heat accumulation and preventing cracking and failure of the spray slot 2 due to high temperature. Based on the above technical solution of this invention, by using a working mode where the metal wire 5 first approaches the grounding electrode 10 and then the discharge electrode 11 before being energized, stable control of the exploding length of the metal wire 5 is achieved. The upper and lower layers of the spray slots 2 shorten the spray gun length, significantly increasing the number of spray slots 2. The cyclical alternation of operation ensures sufficient cooling and prevents cracking of the spray slots 2. This solves the problems of uncontrollable exploding length of the metal wire 5, large fluctuations in the sprayed area, and the problems of excessively long spray guns, insufficient number of slots, inadequate cooling, and short lifespan associated with existing exploding spraying devices.

[0024] As one possible implementation, the intermittent electro-explosive spraying device for the inner wall of the circulating spraying groove of the present invention further includes an lifting component 6 and a pressing component 7. After a single electro-explosion, the pressing component 7 moves the upper spraying groove 2 at one end of the grounding housing 1 to the lower position, and the lifting component 6 moves the lower spraying groove 2 at the other end of the grounding housing 1 to the upper position. With this technical solution, by setting up the lifting component 6 and the pressing component 7, after a single electro-explosion, the pressing component 7 moves the upper spraying groove 2 at one end of the grounding housing 1 to the lower position, and the lifting component 6 moves the lower spraying groove 2 at the other end of the grounding housing 1 to the upper position, thus realizing the cyclic repositioning of the spraying groove 2 between the upper and lower layers. This tossing repositioning method ensures that the lifting rod 602 and the pressing rod 702 only have brief contact with the spraying groove 2, rather than continuous friction. Combined with the structure of direct sliding contact between the spraying groove 2 and the inner wall of the grounding housing 1, this effectively reduces the frictional force during the movement of the spraying groove 2.

[0025] In one possible implementation, the intermittent electro-explosive spraying device for the inner wall of the circulating spray tank of the present invention includes an upward lifting component 6 comprising a first push-pull structure 601 and an upward lifting rod 602; the upward lifting rod 602 has an L-shaped structure; a first connecting rod 104 extends from one end of the grounding housing 1; the first push-pull structure 601 is fixedly installed; the bend of the upward lifting rod 602 is movably connected to the first connecting rod 104; the end of the first push-pull structure 601 near the upward lifting rod 602 is movably connected to one side of the upward lifting rod 602; the first push-pull structure 601 pushes the upward lifting rod 602 to extend the other side of the upward lifting rod 602 into the interior of the grounding housing 1, and moves the lower spray tank 2 to the upper position.

[0026] In the case of the above technical solution, in the intermittent electro-explosive spraying device for the inner wall of the circulating spraying tank of the present invention, the linear motion of the first push-pull structure 601 is converted into the swing motion of the upper lifting rod 602 by the movable connection between the upper lifting rod 602 and the first connecting rod 104 on one side of the grounded housing 1. This causes the other side of the upper lifting rod 602 to contact the lower spraying tank 2 in a prying manner. When the first push-pull structure 601 (such as a push-pull electromagnet) is energized and extends, it pushes one side of the upper lifting rod 602, causing the upper lifting rod 602 to rotate around the hinge at the bend. The other side swings upward and briefly extends into the grounded housing 1, prying the lower spraying tank 2 upward to the upper position. Subsequently, the first push-pull structure 601 is de-energized and reset, and the upper lifting rod 602 automatically returns to its initial position. Throughout the entire process... The lifting rod 602 and the spray groove 2 only have momentary contact rather than continuous friction; at the same time, the bend of the L-shaped lifting rod 602 is movably connected (such as a hinge connection) to the first connecting rod 104 extending from one end of the ground housing 1, forming a stable lever fulcrum. This allows the first push-pull structure 601 to lift the spray groove 2 with only a small driving force. Moreover, the first push-pull structure 601 is fixed and does not need to move with the spray groove 2, simplifying the mass of the moving parts and reducing inertia and impact. In addition, this structure eliminates the need for precise coaxial fit or complex clearance control between the lifting assembly 6 and the spray groove 2. Even under conditions of thermal expansion or long-term wear, there will be no jamming due to dimensional changes, ensuring stable conveying of the carrier tape 4 and stable spraying operation. The first push-pull structure 601 mentioned above can be a commercially available push-pull electromagnet. In actual use, technicians only need to install it according to its function. In this embodiment, the other side of the lifting rod 602 swings upward and briefly extends into the grounding housing 1. This means that after the lifting rod 602 rotates around its bend, the side of the lifting rod 602 extends into the grounding housing 1. Specifically, the end point of the side can be provided with a dial perpendicular to the side. After the lifting rod 602 rotates around its bend, the dial extends into the grounding housing 1 to move any spray groove 2.

[0027] In one possible implementation, in the intermittent electro-explosive spraying device for the inner wall of the circulating spray tank of the present invention, the pressing component 7 includes a second push-pull structure 701 and a pressing rod 702; the pressing rod 702 has an L-shaped structure; a second connecting rod 105 extends from the other end of the grounding housing 1; the second push-pull structure 701 is fixedly installed; the bend of the pressing rod 702 is movably connected to the second connecting rod 105; one end of the second push-pull structure 701 near the pressing rod 702 is movably connected to one side of the pressing rod 702; the second push-pull structure 701 pushes the pressing rod 702 to extend the other side of the pressing rod 702 into the grounding housing 1, and moves the upper spray tank 2 to the lower position.

[0028] In the case of the above technical solution, in the intermittent electro-explosive spraying device for the inner wall of the circulating spraying tank of the present invention, the lowering rod 702 is movably connected to the second connecting rod 105 at the other end of the grounding housing 1, converting the linear motion of the second push-pull structure 701 into the swing motion of the lowering rod 702, and causing the other side of the lowering rod 702 to contact the upper spraying tank 2 in a prying manner. When the second push-pull structure 701 (such as another push-pull electromagnet) is energized and extends, it pushes one side of the lowering rod 702, causing the lowering rod 702 to rotate around the hinge at the bend, and the other side swings downward and briefly extends into the interior of the grounding housing 1, prying the upper spraying tank 2 down to the lower position. Subsequently, the second push-pull structure 701 is de-energized and reset, and the lowering rod 702 automatically returns to the initial position. This process is synchronized with the lifting action of the lifting component 6, so that the uppermost spraying tank 2 and the lowermost spraying tank 2 are in contact with the lowermost spraying tank 2. The spray groove 2 simultaneously completes the interlayer switching; furthermore, the bend of the L-shaped pressing rod 702 is movably connected (such as a hinge connection) to the second connecting rod 105 extending from the other end of the grounding housing 1, forming a stable lever fulcrum, so that the second push-pull structure 701 only needs a small driving force to press down the spray groove 2, and the second push-pull structure 701 is fixed and does not need to move with the spray groove 2, simplifying the moving parts; at the same time, the pressing rod 702 and the spray groove 2 only have a momentary flicking contact rather than continuous friction, which, together with the structure of the direct sliding fit between the spray groove 2 and the inner wall of the grounding housing 1, effectively reduces the friction during the movement, and will not jam even under thermal expansion or long-term operating wear conditions. Together with the lifting component 6, it ensures that the spray groove 2 can smoothly switch between the upper and lower layers, ensuring the stable delivery of the carrier tape 4 and the stable operation of the spraying. The aforementioned second push-pull structure 701 can be a commercially available push-pull electromagnet. In actual use, technicians only need to install it according to its function. In this embodiment, the other side of the pressure rod 702 swings downward and briefly extends into the grounding housing 1. This means that after the pressure rod 702 rotates around its bend, that side of the pressure rod 702 extends into the grounding housing 1. Specifically, the end point of that side can be provided with a dial perpendicular to that side. After the pressure rod 702 rotates around its bend, the dial extends into the grounding housing 1 to move any of the spray grooves 2.

[0029] As one possible implementation, the intermittent electro-explosive spraying device for the inner wall of the circulating spraying tank of the present invention further includes a drive mechanism 8; the drive mechanism 8 drives the upper and lower spraying tanks 2 to move in a clockwise / counterclockwise direction. With this technical solution, the drive mechanism 8 can drive the upper and lower spraying tanks 2 as a whole to move in a clockwise / counterclockwise direction, causing the spraying tanks 2 to cycle between working and non-working positions, achieving automatic spraying operations, providing power support for interlayer repositioning, and further reducing the risk of jamming of the spraying tanks 2 in conjunction with the sliding fit between the spraying tanks 2 and the grounding housing 1.

[0030] In one possible implementation, in the intermittent electro-explosive spraying device for the inner wall of the circulating spray tank of the present invention, after the drive mechanism 8 drives any spray tank 2 to move a single spray tank 2 distance, it returns to the starting position and drives the next spray tank 2 to move a single spray tank 2 distance. With this technical solution, the drive mechanism 8 only drives any spray tank 2 to move one station at a time and then resets before driving the next spray tank 2 in a step-by-step manner. This achieves precise feeding of the spray tank 2, provides accurate positioning for interlayer repositioning, reduces drive load and wear, and, combined with the sliding fit between the spray tank 2 and the grounding housing 1, further eliminates the risk of jamming caused by accumulated errors or excessive friction.

[0031] In one possible implementation, the intermittent electro-explosive spraying device for the inner wall of the circulating spraying tank of the present invention includes a drive mechanism 8 comprising a drive gear set 801, a first transmission rod 802, and a second transmission rod 803. One end of the first transmission rod 802 is provided with a gear groove, and a limiting rod is provided on the side of the first transmission rod 802 away from the gear groove. The drive gear set 801 is located on the side of the grounding housing 1 near the first through hole 101. One end of the second through hole 102 of the grounding housing 1 is provided with a first limiting groove 106. The first transmission rod 802 is connected to the drive gear set 801 through the gear groove, and the limiting rod extends into the interior of the grounding housing 1 through the first limiting groove 106. The second transmission rod 803 is provided with a gear groove and is located on the side of the grounding housing 1 near the first through hole 101, and the gear groove of the second transmission rod 803 is connected to the drive gear set 801. During the rotation of the drive gear set 801, the second transmission rod 803 is driven to move the lower spraying tank 2 one station.

[0032] In the case of the above technical solution, in the intermittent electro-explosive spraying device for the inner wall of the circulating spraying tank of the present invention, the drive gear set 801 simultaneously meshes with the gear grooves on the first transmission rod 802 and the second transmission rod 803; one end of the first transmission rod 802 is provided with a gear groove, and the other side is provided with a limiting rod, which extends through the first limiting groove 106 into the interior of the grounding housing 1, for pushing the upper spraying tank 2 to move one position; the second transmission rod 803 is also connected to the drive gear set 801 and is provided on the side of the grounding housing 1 near the first through hole 101. When the drive gear set 801 rotates, the second transmission rod 803 is driven and pushes the lower spraying tank 2 to move one position; specifically, starting The drive gear set 801 is rotated in one direction, and the limiting rod of the first transmission rod 802 and the second transmission rod 803 simultaneously extend into the grounding housing 1, driving both the upper and lower spray grooves 2 to move one position. Further, the drive gear set 801 is controlled to rotate in the opposite direction, and the limiting rod of the first transmission rod 802 and the second transmission rod 803 simultaneously move away from the grounding housing 1. At this time, the lifting component 6 and the pressing component 7 can be activated, and the upper spray groove 2 and the lower spray groove 2 at both ends of the grounding housing 1 can be switched by the lifting component 6 and the pressing component 7. In this embodiment, the pressing component 6 and the pressing component 7 are the same as described above, and will not be repeated here. In this embodiment, by using a single drive gear set 801 to simultaneously drive two transmission rods, the independent stepping movement of the upper and lower spray tanks 2 is controlled respectively. The structure is highly integrated and the transmission is precise and reliable. For each rotation angle, the two tanks advance one station, ensuring the continuity of the electric blasting operation and avoiding large positioning errors caused by manual repositioning. In this embodiment, the first transmission rod 802 passes through the first fixed position 13 for lateral limitation, and the second transmission rod 803 passes through the second fixed position 14 for lateral limitation.

[0033] In one possible implementation, in the intermittent electro-explosive spraying device for the inner wall of the circulating spray tank of the present invention, a second limiting groove 107 is provided at one end of the first through hole 101 of the grounding housing 1; during the rotation of the drive gear set 801, the drive second transmission rod 803 extends into the interior of the grounding housing 1 through the second limiting groove 107, thereby pushing the lower spray tank 2 to move one position. With this technical solution, a second limiting groove 107 is specifically provided at one end of the first through hole 101 of the grounding housing 1. When the drive gear set 801 rotates, the drive second transmission rod 803 extends into the interior of the grounding housing 1 through the second limiting groove 107, thereby precisely pushing the lower spray tank 2 to move one position. During this process, the second limiting groove 107 provides a moving track and lateral constraint for the second transmission rod 803, ensuring that the second transmission rod 803 moves in a straight line along a fixed path during each action, avoiding positional deviation or jamming caused by excessive overhang or vibration. At the same time, the second limiting groove 107 is independent of the first limiting groove 106 (used for the first transmission rod 802), so that the stepping drive of the upper and lower spray grooves 2 does not interfere with each other, and the structural layout is more compact and orderly.

[0034] In one possible implementation, the intermittent electro-explosive spraying device for the inner wall of the circulating spray tank of the present invention further includes a belt assembly 9; gear grooves are provided at both ends of the first transmission rod 802, and the belt assembly 9 is connected to the gear groove of the first transmission rod 802 on one side of the second through hole 102 of the grounding housing 1; the carrier belt 4 extends from the second through hole 102 of the grounding housing 1 and wraps around the belt assembly 9; the belt assembly 9 is configured to rotate only in the stretching direction of the carrier belt 4. In this technical solution, gear grooves are provided at both ends of the first transmission rod 802, one end of which meshes with the drive gear set 801 to receive rotational power, and the other end of which is connected to the belt assembly 9 on one side of the second through hole 102 of the grounding housing 1; the carrier belt 4 passes through the second through hole 102 of the grounding housing 1 and wraps around the belt assembly 9, and the belt assembly 9 is configured to allow unidirectional rotation only in the stretching direction of the carrier belt 4. When the drive gear set 801 rotates, the first transmission rod 802 pushes the upper spraying groove 2 to move one position, while the gear groove at its other end drives the belt pulling assembly 9 to rotate synchronously. Since the belt pulling assembly 9 can only rotate in one direction, the carrier belt 4 is gradually wound and tightened, thereby driving the metal wire 5 forward to the position to be electro-exploded. In this process, through the same drive gear set 801 and the first transmission rod 802, the two actions of the spraying groove 2 step-by-step repositioning and the intermittent automatic feeding of the carrier belt 4 can be linked and synchronized, without the need for an additional independent feeding drive source; the unidirectional rotation of the belt pulling assembly 9 effectively prevents the carrier belt 4 from retreating or loosening due to vibration or inertia, ensuring that the carrier belt 4 is always in a taut state and accurately delivers the metal wire 5 to the position close to the electrode in each concave groove 201, avoiding feeding jamming or position deviation; furthermore, the belt pulling assembly 9 includes a take-up pulley 901 and a take-up drive. The system comprises a shaft 902, a one-way bearing 903, and a transmission gear 904. The take-up drive shaft 902 is sequentially threaded through the take-up pulley 901 and the inner ring of the one-way bearing 903. Both the take-up pulley 901 and the inner ring of the one-way bearing 903 are axially fixed to the take-up drive shaft 902 and are circumferentially linked. The transmission gear 904 is fixed on the outer ring of the one-way bearing 903 and meshes with the gear groove of the first transmission rod 802. The carrier belt 4 is wound around the take-up pulley 901. When the take-up pulley 901 rotates, it can pull the carrier belt 4 axially backward (i.e., away from the grounding housing 1) through friction. The first transmission rod 802 and the second transmission rod 803 can be circular rod-shaped, cuboid-shaped, or other irregular structures that meet the transmission guidance requirements according to actual assembly and transmission needs.To ensure stable traction and prevent slippage, the carrier belt 4 passes through the second through hole 102 of the grounding housing 1 and wraps around the take-up pulley 901 once. The large wrap angle generates sufficient friction, thus smoothly and reliably tractioning the carrier belt 4 to move axially backward. Furthermore, when the upper spray groove 2 abuts against one end of the grounding housing 1 and the lower spray groove 2 abuts against the other end of the grounding housing 1, the spray groove 2 stops moving entirely. Subsequently, the servo motor drives the drive gear set 801 to move, causing the first transmission rod 802 and the second transmission rod 80... 3. Reset separately; simultaneously, the first transmission rod 802 drives the transmission gear 904 to rotate, causing the transmission gear 904 to drive the outer ring of the one-way bearing 903 to rotate, but the inner ring does not rotate accordingly, thus keeping the take-up pulley 901 stationary and the carrier belt 4 does not move; in the above process, the transmission ratio between the gear of the drive gear set 801 and the transmission gear 904 can be 1:2, and the circumference of the take-up pulley 901 can be half the circumference of the pitch circle of the transmission gear 904. After the rotation of the drive gear set 801 is transmitted to the take-up pulley 901, the belt is taken up. The arc length through which the wheel 901 rotates is half the arc length through which the pitch circle of the drive gear set 801 rotates. At the same time, the length of the spray groove 2 is preferably twice the length of the third through hole 103. Therefore, when the drive mechanism 8 pushes the spray groove 2 to move a distance of one groove position, the carrier belt 4 carrying the metal wire 5 moves exactly one length of the third through hole 103 under the traction of the pull belt assembly 9. When the servo motor drives the drive gear set 801 to completely reset the first transmission rod 802 and the second transmission rod 803, the servo motor stops rotating. In this embodiment, the drive mechanism 8 drives the pull belt assembly 9, and the pull belt assembly 9 pulls the carrier belt 4. When the metal wire 5 on the carrier belt 4 runs to the position of the third through hole 103 of the grounding housing 1 and approaches the grounding electrode 10 and the discharge electrode 11 in succession, the drive gear set 801 stops running, and the pull belt assembly 9 and the carrier belt 4 carrying the metal wire 5 stop feeding synchronously. The discharge electrode 11 is energized, realizing the intermittent supply and positioning discharge of the metal wire 5, solving the technical problems of unstable electric explosion length of the metal wire 5 and large fluctuation of the spraying area.

[0035] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0036] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A device for intermittent electro-explosive spraying of the inner wall of a circulating spray tank, characterized in that, include: A grounding housing has a first through hole and a second through hole on opposite end faces; a third through hole is provided on either side of the grounding housing, and a grounding electrode is provided on the side of the third through hole closer to the first through hole; The spray groove has a concave groove; a plurality of the spray grooves are arranged in two layers inside the grounding housing, with the opening of the concave groove facing the side of the third through hole; An insulating rod is provided with a discharge electrode inside; a lower spray groove is positioned close to a third through hole; the insulating rod passes through the second through hole and the lower concave groove, and the discharge electrode is positioned on the side of the third through hole away from the first through hole; there is a voltage difference between the grounding electrode and the discharge electrode. The carrying wire passes through the first through hole, the lower concave groove, and the second through hole to drive the metal wire to move inside the concave groove and bring the metal wire close to the grounding electrode and the discharge electrode inside either concave groove. The upper and lower spray channels move in a clockwise / counterclockwise direction. After a single electric blast ends, the adjacent spray channel switches to the third through hole position for the next electric blast. It also includes an lifting component, a pressing component, and a drive mechanism; after a single electric explosion, the pressing component moves the upper spray groove at one end of the grounding housing to the lower position, and the lifting component moves the lower spray groove at the other end of the grounding housing to the upper position. The drive mechanism is used to drive the upper and lower spray slots to move in a clockwise / counterclockwise direction; after the drive mechanism drives any spray slot to move a single spray slot distance, it returns to the starting position and drives the next spray slot to move a single spray slot distance.

2. The intermittent electro-explosive spraying device for the inner wall of the circulating spray tank according to claim 1, characterized in that, The lifting assembly includes a first push-pull structure and a lifting rod; The structure of the lifting rod includes an L-shape; a first connecting rod extends from one end of the grounding housing; the first push-pull structure is fixedly installed; The bend of the lifting rod is movably connected to the first connecting rod; The first push-pull structure is movably connected to one side of the upper lifting rod at one end; the first push-pull structure pushes the upper lifting rod to extend the other side of the upper lifting rod into the grounding housing, and moves the lower spray groove to the upper position.

3. The intermittent electro-explosive spraying device for the inner wall of the circulating spray tank according to claim 2, characterized in that, The pressing assembly includes a second push-pull structure and a pressing rod; The structure of the pressure rod includes an L-shape; a second connecting rod extends from the other end of the grounding housing; the second push-pull structure is fixedly installed; The bend of the lower pressure rod is movably connected to the second connecting rod; one end of the second push-pull structure near the lower pressure rod is movably connected to one side of the lower pressure rod; the second push-pull structure pushes the lower pressure rod to extend the other side of the lower pressure rod into the grounding housing and moves the upper spray groove to the lower position.

4. The intermittent electro-explosive spraying device for the inner wall of the circulating spray tank according to claim 3, characterized in that, The first push-pull structure includes a first push-pull electromagnet; The second push-pull structure includes a second push-pull electromagnet.

5. The intermittent electro-explosive spraying device for the inner wall of the circulating spray tank according to claim 4, characterized in that, The drive mechanism includes a drive gear set, a first transmission rod, and a second transmission rod; One end of the first transmission rod is provided with a gear groove, and a limit rod is provided on the side of the first transmission rod away from the gear groove; The drive gear set is disposed on the side of the grounding housing near the first through hole; A first limiting groove is provided at one end of the second through hole of the grounding shell; The first transmission rod is connected to the drive gear set through the gear groove, and the limiting rod extends into the grounding housing through the first limiting groove; The second transmission rod is provided with a gear groove, which is located on the side of the grounding housing near the first through hole. The gear groove of the second transmission rod is connected to the drive gear set. During the rotation of the drive gear set, the second transmission rod is driven to push the lower spraying groove to move one position.

6. The intermittent electro-explosive spraying device for the inner wall of the circulating spray tank according to claim 5, characterized in that, A second limiting groove is provided at one end of the first through hole of the grounding shell; During the rotation of the drive gear set, the second transmission rod is driven to extend through the second limiting groove into the grounding housing, pushing the lower spraying groove to move one station.

7. The intermittent electro-explosive spraying device for the inner wall of the circulating spray tank according to claim 6, characterized in that, It also includes a pull strap assembly; The first transmission rod has gear grooves at both ends, and the pull belt assembly is connected to the gear grooves of the first transmission rod on one side of the second through hole of the grounding housing; The carrier ribbon extends from the second through-hole of the grounding housing and wraps around the pull ribbon assembly; the pull ribbon assembly is configured to rotate only in the direction in which the carrier ribbon is stretched.

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