Hydraulic acid injection device for conveying tungstic acid

Abstract

The invention discloses a hydraulic acid injection device for conveying tungstic acid, and belongs to the technical field of hydraulic acid injection. Comprising an assembling support, a hydraulic power unit and a tungstic acid storage unit, the hydraulic power unit and the tungstic acid storage unit are assembled on the side edge of the assembling support, an acid liquor conveying unit is arranged on the outer surface of the hydraulic power unit, and a first acid liquor conveying sleeve concentric with the first acid liquor conveying sleeve is movably installed in an anti-corrosion sleeve shell; a concentric second acid liquor conveying sleeve is fixedly installed in the first acid liquor conveying sleeve, an additive conveying module is arranged in a cavity, a cavity also exists between the first acid liquor conveying sleeve and the second acid liquor conveying sleeve, a magnetic attraction driving module is arranged in the cavity, and through collaborative design of the magnetic attraction driving module and a magnetic attraction driven module, the magnetic attraction driving module and the magnetic attraction driven module can drive the additive to be conveyed to the second acid liquor conveying sleeve. And external over-the-air control cleaning of impurity particles on the inner wall of the conveying cavity is realized. Compared with an existing built-in mechanical scraper or external pulse cleaning technology, according to the scheme, the driving component is arranged in the cavity on the outer side of the conveying cavity in a sleeved mode.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic acid injection, and more specifically to a hydraulic acid injection device for conveying tungstic acid. Background Art

[0002] As a key intermediate in tungsten smelting and fluorine chemical industry, tungstic acid is widely used in the preparation of cemented carbide, catalyst and nuclear industry shielding materials. In the prior art, tungstic acid transportation is mainly achieved through hydraulic acid injection device, whose core structure includes hydraulic power unit, corrosion-resistant liquid storage tank and transportation pipeline. In the actual operation of hydraulic acid injection device, stable pressure is generated by hydraulic system to push tungstic acid through pipeline, and the flow control structure can also realize precise adjustment of injection volume to avoid manual operation contact with corrosive liquid and reduce leakage risk.

[0003] During the production process, tungstic acid is easy to crystallize into solid particles under low temperature or high concentration conditions, which can easily cause blockage of pipes or cavities. The residual acid forms hard particles after drying and adheres to the inner wall of the conveying cavity. Traditional cleaning requires disassembly of the equipment and neutralization and flushing with alkaline solution, which is not only complicated to operate, but also difficult to completely remove residues in dead corners.

[0004] In the prior art, the residual hard particles are treated by external pulse cleaning equipment or by internal mechanical scrapers or nozzles. However, the internal mechanical scrapers or nozzles occupy the cavity space, which is very easy to interfere with the normal conveying process during actual use, and the high-pressure corrosive environment accelerates the failure of components. Although the external pulse cleaning equipment avoids direct contact with acid, it relies on shutdown and disassembly operations and cannot accurately cover the dead corners of the inner wall. Therefore, there is an urgent need for a non-invasive cleaning structure that can control the cleaning action remotely through an external driving component without occupying the internal space of the conveying cavity. Summary of the invention

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a hydraulic acid injection device for tungstic acid transportation, aiming to solve the above technical problems.

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] A hydraulic acid injection device for conveying tungstic acid comprises an assembly bracket, a hydraulic power unit and a tungstic acid storage unit assembled on the side of the assembly bracket, an acid delivery unit is arranged on the outer surface of the hydraulic power unit, the acid delivery unit comprises a corrosion-resistant casing, a first acid delivery casing concentrically mounted movably inside the corrosion-resistant casing, a second acid delivery casing concentrically mounted fixedly inside the first acid delivery casing, a cavity is provided between the corrosion-resistant casing and the first acid delivery casing, an additive delivery module is arranged in the cavity, a cavity is also provided between the first acid delivery casing and the second acid delivery casing, a magnetic attraction drive module is arranged in the cavity; The output end of the hydraulic power unit is fixedly installed with a hydraulic push disk which is sealed and extends into the second acid liquid delivery sleeve for hydraulic acid injection. The interior of the second acid liquid delivery sleeve is also provided with a magnetic driven module which is placed at the front side of the push end of the hydraulic push disk and corresponds to the magnetic drive module; Among them, the magnetic driven module includes a second circular frame and driven rings movably mounted on both sides of the second circular frame. The magnetic driving module adsorbs the second circular frame and moves back and forth against the inner wall of the second acid delivery sleeve, and drives the driven ring to rotate back and forth to rub the granular impurities.

[0008] As a further solution of the present invention: the corrosion-resistant casing is fixedly installed as a whole on the outer surface of the output end of the hydraulic power unit, and an outward expansion cavity is also fixedly installed on the side of the corrosion-resistant casing close to the outer surface of the hydraulic power unit, a first servo motor is fixedly installed in the outward expansion cavity, a gear sleeve head is fixedly installed on the output end of the first servo motor, a second gear ring corresponding to the gear sleeve head is fixedly installed on the outer annular surface of the first acid liquid delivery casing, a third gear ring is fixedly installed on the inner annular surface of the first acid liquid delivery casing, an injection muzzle is fixedly installed on the output end of the second acid liquid delivery casing, a second servo motor is fixedly installed on the side wall of the injection muzzle, and a threaded rod is fixedly installed on the output end of the second servo motor.

[0009] As a further solution of the present invention: a groove opening for the threaded rod to penetrate is provided on the outer annular surface of the second acid liquid delivery sleeve, and the magnetic drive module includes a first annular frame movably installed on the outer annular surface of the second acid liquid delivery sleeve, a nut sleeve opening which is slidably sleeved in the groove opening and meshed with the threaded rod is fixedly installed on the inner annular surface of the first annular frame, and an embedded first electrically-controlled magnetic suction head is also fixedly installed at a position opposite to the nut sleeve opening on the inner annular surface of the first annular frame, the magnetic suction end of the first electrically-controlled magnetic suction head is tightly attached to the outer annular surface of the second acid liquid delivery sleeve, and first annular grooves are provided at both side ends of the outer annular surface of the first annular frame.

[0010] As a further solution of the present invention: the magnetic drive module also includes an outer ring shell movably installed on the outer ring of the first ring frame, a buckle block engaged in the first ring groove is fixedly installed on the inner ring edge of the outer ring shell, and extended side panels are fixedly installed on both side walls of the outer ring shell, and the outer surface of the extended side panels is fixedly installed with a second electrically controlled magnetic head, and the magnetic end of the second electrically controlled magnetic head is tightly attached to the outer ring surface of the second acid liquid delivery sleeve, and a first gear ring engaged with the third gear ring is fixedly installed on the outer ring surface of the outer ring shell.

[0011] As a further solution of the present invention: the magnetic driven module also includes a second circular groove opened on the side of the second circular frame, the second circular groove is a non-closed-loop C-shape as a whole, and a connecting cavity rod is movably inserted and installed through the second circular groove, and driven rings are fixedly installed on both sides of the connecting cavity rod, and a grinding coating that fits the inner circular wall of the second acid liquid delivery sleeve is fixedly installed on the outer circular surface of the driven ring, the grinding coating is also a non-closed-loop C-shape, and a magnetic block corresponding to the second electrically controlled magnetic head on the same side is fixedly installed at the position where the grinding coating is not closed.

[0012] As a further solution of the present invention: a circular conduit is fixedly installed inside the driven ring, and a plurality of auxiliary injection branches passing through the surface of the polished coating are connected to the outer circular ring of the circular conduit, and the circular conduits on both sides of the second circular ring frame are fixedly connected with a communicating second connecting conduit through the internal cavity of the connecting cavity rod; a first connecting conduit is also fixedly installed on the circular conduit on the outer side of the second circular ring frame facing the output end of the second acid liquid delivery sleeve, and a sealing opening for inserting the first connecting conduit is opened on the side of the corrosion-resistant casing close to the injection muzzle, and the sealing opening passes through the cavity between the corrosion-resistant casing and the first acid liquid delivery sleeve.

[0013] As a further solution of the present invention: the additive delivery module includes a plurality of groups of fan-shaped storage cavities fixedly mounted on the inner wall of the corrosion-resistant casing, the fan-shaped storage cavities are located as a whole in the cavity between the corrosion-resistant casing and the first acid liquid delivery casing, and each group of fan-shaped storage cavities are independent of each other, and a replenishing valve head is fixedly mounted on the outer annular surface of each group of fan-shaped storage cavities, a circular tube storage cavity is fixedly mounted on the side of the fan-shaped storage cavity facing the output end of the first acid liquid delivery casing, an electric control valve is fixedly mounted on the outer side of the circular tube storage cavity, and a conduit is mounted on the outer side of each group of fan-shaped storage cavities through the circular tube storage cavity into the valve body of the electric control valve, a winding cover is fixedly mounted on the side of the electric control valve, a torsion shaft is fixedly mounted at the internal axial position of the winding cover, an external pull conduit is wound around the torsion shaft, one side of the external pull conduit is connected to the output end of the electric control valve, and one side passes through the winding cover and is sealed in the sealing port, and a magnetic suction fluid module is also arranged on the end face of the external pull conduit stuck in the sealing port.

[0014] As a further solution of the present invention: the magnetic suction fluid flow module includes a sealing sleeve fixedly installed on the end face of one side of the external pull-in catheter clamped in the sealing port, a third electrically controlled magnetic suction head is fixedly installed on the outer edge surface of the sealing sleeve, a first insertion port is opened inside the open end of the sealing sleeve, a plurality of groups of cavities are opened on the outer circular ring edge of the first insertion port, and a reset rod is fixedly installed in each group of cavities, and a limiting groove is opened on the side of each group of cavities, a U-shaped rod that slides in the limiting groove on the same side is fixedly installed on the reset end of the reset rod, and a first sealing block that is sealed inside the first insertion port is fixedly installed through the U-shaped rod on each side, and a second insertion port is also opened inside the sealing sleeve at a position close to the first insertion port.

[0015] As a further solution of the present invention: the magnetic absorption fluid module also includes a metal adsorption ring fixedly installed on the outer side surface of the first connecting conduit, and an inserted tube is also fixedly installed on the outer end surface of the metal adsorption ring, and a second sealing block is also fixedly installed on the outer circular ring surface of the inserted tube, and a plurality of leakage ports are arranged in a circular shape on the protruding end of the inserted tube.

[0016] As a further solution of the present invention: a through hole is also opened on the side wall of the injection gun muzzle to penetrate into the interior of the second acid liquid delivery casing, and a one-way control valve is fixedly installed in the through hole, and a conduit connected to the output end of the tungstic acid storage unit is also fixedly installed through the one-way control valve, and an outward-turning maintenance plate is also movably installed on the outer surface of the corrosion-resistant casing.

[0017] Compared with the prior art, the above technical solution provided by the present invention has at least the following beneficial effects: (1) This solution achieves external remote control cleaning of impurity particles on the inner wall of the conveying cavity through the coordinated design of the magnetic drive module and the magnetic follower module. Compared with the existing built-in mechanical scraper or external pulse cleaning technology, this solution sets the drive component in the cavity outside the conveying cavity, and uses the electric-controlled magnetic head to adsorb the driven ring to move back and forth and rotate along the inner wall. Combined with the friction of the polishing coating, it can completely remove the attached particles, avoiding the traditional built-in structure from occupying the cavity space and the erosion of the drive components by corrosive media. At the same time, the magnetic drive module is linked to the servo motor through a threaded rod to accurately control the cleaning path and force, solving the defect that the external cleaning equipment relies on shutdown operation and cannot cover dead corners.

[0018] (2) By integrating the additive delivery module, the chelating agent, neutralizing agent and deionized water are injected in stages to achieve the synergistic effect of chemical dissolution and mechanical cleaning. The modularly designed fan-shaped storage chamber independently stores three types of reagents. The injection sequence and flow rate are dynamically adjusted by the electric control valve and the external pull-out catheter to ensure that the cleaning agent accurately covers the dead corners of the inner wall, forming a closed-loop cleaning process. Compared with traditional single alkaline flushing or manual disassembly cleaning, this solution will improve the cleaning efficiency and avoid secondary corrosion of chemical reagents and equipment materials, and is suitable for continuous production needs in high-corrosion environments in the fluorine chemical industry.

[0019] (3) Through the magnetic suction and fluid flow module and the rotatable sleeve structure, the present invention further optimizes the sealing and maintenance convenience of the cleaning agent delivery. The magnetic suction and fluid flow module uses a double sealing design of a third electrically controlled magnetic suction head and an inserted through tube to ensure zero leakage when the external pull-out catheter is connected to the cleaning unit. At the same time, the reset rod and the sealing block are automatically closed after disconnection to prevent acid reverse seepage. In addition, the corrosion-resistant casing's flip-out maintenance plate and quick-release fan-shaped storage chamber design support online fluid replenishment and component replacement, reducing downtime for maintenance. Compared with the complicated pipeline disassembly process in the prior art, this design improves maintenance efficiency and extends the service life of key components. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a structural schematic diagram of the acid liquid delivery unit of the present invention in a semi-sectioned state; Figure 3 It is a structural schematic diagram of the corrosion-resistant casing of the present invention in a disassembled state; Figure 4 for Figure 3 A schematic diagram of the enlarged structure at A in the middle; Figure 5 It is a partial structural schematic diagram of the second acid liquid conveying casing of the present invention; Figure 6 It is a schematic diagram of the structure of the magnetic attraction driving module of the present invention in a disassembled state; Figure 7 It is a schematic diagram of the structure of the magnetically attracted driven module of the present invention in a disassembled state; Figure 8 It is a schematic diagram of the internal structure of the driven ring of the present invention; Fig. 9 It is a structural schematic diagram of the fan-shaped storage chamber of the present invention in a split state; Fig.10 It is a structural schematic diagram of a half-section state of the magnetic absorption fluid module of the present invention.

[0022] Reference numerals 1. Assemble the bracket; 2. Hydraulic power unit; 3. Acid liquid delivery unit; 31. Corrosion-resistant casing; 32. Outward expansion cavity; 33. First servo motor; 34. Gear sleeve; 35. Outward-turning maintenance plate; 4. Injection muzzle; 5. Tungsten acid storage unit; 6. First acid delivery casing; 7. Second acid delivery casing; 8. Hydraulic push plate; 9. Additive delivery module; 91. Fan-shaped storage chamber; 92. Liquid replenishment valve head; 93. Ring storage tube chamber; 94. Electric control valve; 95. Winding cover; 96. Torsion shaft; 97. External pull catheter; 10. Magnetic drive module; 101. First circular frame; 102. First electrically controlled magnetic head; 103. Nut sleeve; 104. First circular notch; 105. Outer circular shell; 106. Buckle block; 107. Extended side plate; 108. Second electrically controlled magnetic head; 109. First gear circular ring; 11. Magnetic driven module; 111. Second circular ring frame; 112. Second circular ring notch; 113. Connecting cavity rod; 114. Driven ring; 115. First connecting conduit; 116. Circular conduit; 117. Grinding coating; 118. Auxiliary injection branch; 119. Second connecting conduit; 1110. Magnetic block; 12. second servo motor; 13. one-way control valve; 14. sealing port; 15. second gear ring; 16. third gear ring; 17. groove port; 18. threaded rod; 19. Magnetic suction fluid module; 191. Sealing sleeve; 192. Third electrically controlled magnetic suction head; 193. First insertion port; 194. Reset rod; 195. Limiting groove; 196. U-shaped rod; 197. First sealing block; 198. Second insertion port; 199. Metal adsorption ring; 1910. Second sealing block; 1911. Insertion tube; 1912. Liquid leakage port.

[0023] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0024] The following is a detailed description of a hydraulic acid injection device for tungstic acid transportation provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and other alternatives can also be adopted by technicians in some known technical fields; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0025] like Figures 1 to 10 As shown, an embodiment of the present invention provides a hydraulic acid injection device for tungstic acid transportation, comprising an assembly bracket 1 and a hydraulic power unit 2 and a tungstic acid storage unit 5 assembled on the side of the assembly bracket 1, wherein the outer surface of the hydraulic power unit 2 is provided with an acid delivery unit 3, wherein the acid delivery unit 3 comprises a corrosion-resistant casing 31, wherein a first acid delivery casing 6 having a concentric center is movably installed inside the corrosion-resistant casing 31, wherein a second acid delivery casing 7 having a concentric center is fixedly installed inside the first acid delivery casing 6, wherein a cavity exists between the corrosion-resistant casing 31 and the first acid delivery casing 6, and an additive delivery module 9 is arranged in the cavity, wherein a cavity also exists between the first acid delivery casing 6 and the second acid delivery casing 7, and a magnetic attraction drive module 10 is arranged in the cavity; The output end of the hydraulic power unit 2 is fixedly installed with a hydraulic push disk 8 that is sealed and extends into the second acid liquid delivery sleeve 7 for hydraulic acid injection. The interior of the second acid liquid delivery sleeve 7 is also provided with a magnetic driven module 11 that is placed at the front side of the push end of the hydraulic push disk 8 and is adsorbed correspondingly to the magnetic drive module 10; Among them, the magnetic driven module 11 includes a second circular frame 111 and a driven ring 114 movably mounted on both sides of the second circular frame 111. The magnetic driving module 10 adsorbs the second circular frame 111 and reciprocates against the inner wall of the second acid liquid delivery sleeve 7, and drives the driven ring 114 to rotate reciprocatingly to rub the granular impurities.

[0026] In order to solve the problem that the acid injection chamber of the existing pressure acid injection device cannot be cleaned of inner wall impurity particles through remote control by external driving components, the above-mentioned technical solution is now adopted to solve the problem. The above-mentioned technical solution is mainly composed of an assembly bracket 1, a hydraulic power unit 2, an acid delivery unit 3, a first acid delivery sleeve 6, a second acid delivery sleeve 7, an additive delivery module 9, a magnetic drive module 10 and a magnetic driven module 11. The assembly bracket 1 serves as the main supporting structure of the device, and it is used to set various components. During use, several universal wheels can be optionally installed to improve the smoothness of the device during use. The hydraulic power unit 2 serves as the main driving unit for acid injection of the device, including pressure drive, flow control and other structures. During use, a stable pressure is generated through the hydraulic system to push tungstic acid through the pipeline, and the injection amount is accurately adjusted through a micro-liter precision regulator, which is an inherent structure of precision acid injection in the prior art. The acid liquid conveying unit 3 mainly includes a corrosion-resistant casing 31, which is integrally installed on the outer surface of the hydraulic acid injection pump of the hydraulic power unit 2, and a first acid liquid conveying casing 6 and a second acid liquid conveying casing 7 are installed concentrically inside, and three groups of cavities are formed in sequence from the outside to the inside through the first acid liquid conveying casing 6 and the second acid liquid conveying casing 7. The first group of cavities is arranged between the corrosion-resistant casing 31 and the first acid liquid conveying casing 6, and the interior of the cavity is used to configure an additive conveying module 9. The second group of cavities is arranged between the first acid liquid conveying casing 6 and the second acid liquid conveying casing 7, and the interior of the cavity is used to configure a magnetic drive module 10. The third group of cavities is arranged inside the second acid liquid conveying casing 7, and a magnetic driven module 11 corresponding to the adsorption of the magnetic drive module 10 is arranged in the cavity, and the hydraulic output end of the hydraulic power unit 2 also extends into the cavity, and the acid is pushed out of the cavity through the hydraulic push disk 8 at the output end.

[0027] The magnetic driven module 11 arranged inside the second acid liquid delivery sleeve 7, as a unit in the device for cleaning particulate impurities inside the second acid liquid delivery sleeve 7, mainly includes a second circular frame 111 and driven rings 114 movably mounted on both sides of the second circular frame 111. The second circular frame 111 is used to drive the entire structure to reciprocate inside the second acid liquid delivery sleeve 7, and the driven rings 114 on both sides can, on the one hand, scrape and clean the inner wall of the second acid liquid delivery sleeve 7 during the reciprocating movement of the second circular frame 111, and on the other hand, it is movably assembled and can also rotate back and forth under the adsorption drive of the outer magnetic drive module 10, thereby further improving the efficiency of friction particle impurities. The structural magnetic drive module 10 used to drive the device for cleaning is mounted in the cavity between the first acid liquid delivery sleeve 6 and the second acid liquid delivery sleeve 7, so as to separate the drive components and achieve the effect of remote control to clean the impurity particles on the inner wall.

[0028] like Figures 1 to 10As shown, the corrosion-resistant casing 31 is integrally fixedly installed on the outer surface of the output end of the hydraulic power unit 2, and an outward expansion cavity 32 is also fixedly installed on the side of the corrosion-resistant casing 31 close to the outer surface of the hydraulic power unit 2, a first servo motor 33 is fixedly installed in the outward expansion cavity 32, a gear sleeve 34 is fixedly installed on the output end of the first servo motor 33, a second gear ring 15 corresponding to the gear sleeve 34 is fixedly installed on the outer annular surface of the first acid liquid delivery casing 6, a third gear ring 16 is fixedly installed on the inner annular surface of the first acid liquid delivery casing 6, an injection muzzle 4 is fixedly installed on the output end of the second acid liquid delivery casing 7, a second servo motor 12 is fixedly installed on the side wall of the injection muzzle 4, and a threaded rod 18 is fixedly installed on the output end of the second servo motor 12.

[0029] Among them, the purpose of the configured outward expansion cavity 32 is to reserve a space for the first servo motor 33 to work, so that the gear sleeve 34 at the output end of the first servo motor 33 can stably drive the second gear ring 15 on the outer annular surface of the first acid liquid delivery sleeve 6 to rotate in the space. Because the first acid liquid delivery sleeve 6 is movably installed inside the corrosion-resistant sleeve 31, the first acid liquid delivery sleeve 6 can be driven to rotate synchronously during the operation of the output end of the first servo motor 33. The injection muzzle 4 configured at the output end of the above-mentioned second acid liquid delivery sleeve 7 is a connection valve head structure in the prior art, which is used to stably deliver the acid reagent in the second acid liquid delivery sleeve 7 to the target device.

[0030] like Figures 1 to 10 As shown, a groove 17 for the threaded rod 18 to penetrate is provided on the outer annular surface of the second acid liquid conveying sleeve 7, and the magnetic drive module 10 includes a first annular frame 101 movably installed on the outer annular surface of the second acid liquid conveying sleeve 7, and a nut sleeve 103 that slides in the groove 17 and engages with the threaded rod 18 is fixedly installed on the inner annular surface of the first annular frame 101, and an embedded first electrically controlled magnetic suction head 102 is fixedly installed at a position opposite to the nut sleeve 103 on the inner annular surface of the first annular frame 101, and the magnetic suction end of the first electrically controlled magnetic suction head 102 is tightly attached to the outer annular surface of the second acid liquid conveying sleeve 7, and first annular grooves 104 are provided at both side ends of the outer annular surface of the first annular frame 101.

[0031] Among them, the configured second acid liquid delivery sleeve 7 is fixedly installed inside the corrosion-resistant sleeve 31, and a groove opening 17 for the threaded rod 18 to penetrate is opened on the outer annular surface of the second acid liquid delivery sleeve 7, and the first circular ring frame 101 is slidably sleeved on the outer annular surface of the second acid liquid delivery sleeve 7 through the groove opening 17. During the rotation of the threaded rod 18 at the output end of the second servo motor 12 on the injection muzzle 4, the meshing first circular ring frame 101 can be driven to reciprocate along the groove opening 17 on the outer annular surface of the second acid liquid delivery sleeve 7, thereby controlling the reciprocating movement of the magnetic attraction drive module 10.

[0032] like Figures 1 to 10 As shown, the magnetic drive module 10 also includes an outer circular ring shell 105 movably mounted on the outer circular ring of the first circular ring frame 101, and a convex buckle block 106 engaged in the first circular ring groove 104 is fixedly mounted on the inner circular ring edge of the outer circular ring shell 105, and an extended side plate 107 is fixedly mounted on both side walls of the outer circular ring shell 105, and a second electrically controlled magnetic suction head 108 is fixedly mounted on the outer surface of the extended side plate 107, and the magnetic suction end of the second electrically controlled magnetic suction head 108 is tightly attached to the outer circular ring surface of the second acid liquid delivery sleeve 7, and a first gear ring 109 that is sleeved with the third gear ring 16 is fixedly mounted on the outer circular ring surface of the outer circular ring shell 105.

[0033] The second electrically controlled magnetic suction head 108 is a device in the prior art that can electrically control the magnetic suction state of its magnetic suction end face, and can open or change its magnetic suction state.

[0034] like Figures 1 to 10 As shown, the magnetic follower module 11 also includes a second circular groove 112 opened on the side of the second circular frame 111, the second circular groove 112 is a non-closed-loop C-shape as a whole, and a connecting cavity rod 113 is movably inserted and installed through the second circular groove 112, and both sides of the connecting cavity rod 113 are fixedly installed with follower rings 114, and the outer circular surface of the follower ring 114 is fixedly installed with a grinding coating 117 that fits the inner circular wall of the second acid liquid delivery sleeve 7, the grinding coating 117 is also a non-closed-loop C-shape, and the position where the grinding coating 117 is not closed is fixedly installed with a magnetic block 1110 corresponding to the second electrically controlled magnetic head 108 on the same side to adsorb.

[0035] like Figures 1 to 10As shown, a circular conduit 116 is fixedly installed inside the driven ring 114, and a plurality of auxiliary injection branches 118 passing through the surface of the grinding coating 117 are connected on the outer circular ring of the circular conduit 116, and the circular conduits 116 on both sides of the second circular frame 111 are fixedly connected with a communicating second connecting conduit 119 through the internal cavity of the connecting cavity rod 113, and a first connecting conduit 115 is also fixedly installed on the circular conduit 116 on the side of the outer side of the second circular frame 111 facing the output end of the second acid liquid delivery sleeve 7, and a sealing opening 14 for inserting the first connecting conduit 115 is opened on the side of the corrosion-resistant casing 31 close to the injection muzzle 4, and the sealing opening 14 passes through the cavity between the corrosion-resistant casing 31 and the first acid liquid delivery sleeve 6.

[0036] like Figures 1 to 10 As shown, the additive delivery module 9 includes a plurality of groups of fan-shaped storage chambers 91 fixedly mounted on the inner wall of the corrosion-resistant casing 31, the fan-shaped storage chambers 91 are located as a whole in the cavity between the corrosion-resistant casing 31 and the first acid liquid delivery casing 6, and each group of fan-shaped storage chambers 91 is independent of each other, and a liquid replenishment valve head 92 is fixedly mounted on the outer annular surface of each group of fan-shaped storage chambers 91, a circular storage tube chamber 93 is fixedly mounted on the side of the fan-shaped storage chamber 91 facing the output end of the first acid liquid delivery casing 6, an electric control valve 94 is fixedly mounted on the outer side of the circular storage tube chamber 93, and each group of fan-shaped storage chambers 91 is fixedly mounted on the outer side of the circular storage tube chamber 93. A conduit is installed on the outside of the annular storage cavity 91 and penetrates into the valve body of the electric control valve 94 through the annular storage cavity 93. A winding cover 95 is fixedly installed on the side of the electric control valve 94. A torsion shaft 96 is fixedly installed at the internal axial position of the winding cover 95. An external pull conduit 97 is wound around the torsion shaft 96. One side of the external pull conduit 97 is connected to the output end of the electric control valve 94, and the other side passes through the winding cover 95 and is sealed in the sealing port 14, and a magnetic suction fluid module 19 is also arranged on the end face of the external pull conduit 97 stuck in the sealing port 14.

[0037] Among them, the configured additive delivery module 9 is used to store additives, because tungstic acid is easy to crystallize into hard particles under low temperature or high concentration conditions, and adhere to the inner wall of the cavity or pipe. It is difficult to completely remove it by physical cleaning, and the tungstic acid after drying may be converted into insoluble substances such as tungsten oxide, which requires chemical dissolution. Therefore, in order to improve the efficiency of the cleaning end during the cleaning process, an additive delivery module 9 is required. The additive delivery module 9 is a circular structure composed of three groups of fan-shaped storage chambers 91. The three groups of fan-shaped storage chambers 91 can store neutralizers, complexing agents and deionized water respectively. The neutralizer can be an alkaline solution, such as 5% sodium carbonate or sodium hydroxide solution, to neutralize residual tungstic acid and reduce corrosiveness, and the complexing agent can be selected. Citric acid or EDTA is selected to form a soluble complex citric acid complex with tungstate to dissolve the crystallized tungstate particles and prevent secondary deposition, and deionized water is used to rinse the neutralized waste liquid and residual reagents. During the working process, the reagent injection sequence can be as follows: injecting the complexing agent to dissolve the crystals, injecting the neutralizing agent to neutralize the acidity, and then rinsing with deionized water. Therefore, the three groups of fan-shaped storage chambers 91 are independent of each other, and are all equipped with conduits for outward output. Moreover, the three conduits are arranged in a circular ring from the annular storage tube cavity 93 to the valve body of the electric control valve 94. The electric control valve 94 is an electric valve structure in the prior art that can control the three branch conduits, so that the three groups of fan-shaped storage chambers 91 can discharge liquid outward in sequence according to the corresponding order.

[0038] Because the magnetic driven module 11 is used as a cleaning end and is arranged inside through the second acid delivery sleeve 7, and because tungstic acid is relatively corrosive, in order to ensure the delivery stability of the auxiliary added cleaning agent, its three sets of fan-shaped storage chambers 91 are integrally arranged on the outside of the first acid delivery sleeve 6, and only penetrate into the sealed port 14 through the external pull-out catheter 97, so that the first connecting catheter 115 in the subsequent magnetic driven module 11 can be connected to the external pull-out catheter 97, and then the wound external pull-out catheter 97 can be pulled out for use after forming an integrated structure with the external pull-out catheter 97, so as to meet the reciprocating and rotating cleaning needs of the magnetic driven module 11. The winding cover 95 is configured with a torsion shaft 96 at the axial position, and the torsion shaft 96 is used to reset the outer pull tube 97. In the absence of external force, the outer pull tube 97 can be stably and sealed in the sealing port 14. When the first connecting tube 115 in the subsequent magnetic follower module 11 is connected to the outer pull tube 97 to pull it out, the outer pull tube 97 can also be pulled out. When there is no pulling force on the outer end of the outer pull tube 97, the outer pull tube 97 can be pulled back into the sealing port 14 under the reset action of the torsion shaft 96 to complete the reset work.

[0039] In summary, the specific working process of the configured magnetic attraction driven module 11 is as follows: First, tungstic acid is injected into the tungstic acid storage unit 5, and flows through the conduit to the position of the one-way control valve 13 on the injection muzzle 4, and the one-way control valve 13 is opened to allow the tungstic acid to be directly injected into the second acid liquid delivery sleeve 7, and then the tungstic acid injected into the second acid liquid delivery sleeve 7 is pushed out through the hydraulic push disk 8 at the output end of the hydraulic power unit 2, and finally stably injected into the target container through the injection muzzle 4. During the hydraulic injection process, the one-way control valve 13 must be kept in a closed state to avoid tungstic acid backflow.

[0040] Then, after the second acid liquid delivery sleeve 7 has been injected for a long time, due to the characteristics of tungstic acid, particulate impurities will be formed on the inner wall of the second acid liquid delivery sleeve 7, which needs to be cleaned by the magnetic driven module 11. During the cleaning process, the hydraulic push disk 8 needs to be retracted, the second servo motor 12 needs to be turned on, and the threaded rod 18 at the output end of the second servo motor 12 is meshed with the nut sleeve 103. During the rotation of the threaded rod 18, the first annular frame 101 can be moved along the groove 17 on the side wall of the second acid liquid delivery sleeve 7 for the threaded rod 18 to rotate. During the movement, the first annular frame 101 can be controlled by controlling the rotation direction of the threaded rod 18 at the output end of the second servo motor 12. The circular frame 101 reciprocates along the outer surface of the second acid liquid delivery sleeve 7. Because the inner wall of the first circular frame 101 is provided with a first electrically controlled magnetic suction head 102 adsorbed with the second circular frame 111, it is only necessary to use the first electrically controlled magnetic suction head 102 to tightly adsorb the second circular frame 111 across the second acid liquid delivery sleeve 7. In the process of the reciprocating movement of the first circular frame 101, the second circular frame 111 can be driven to reciprocate on the inner wall of the second acid liquid delivery sleeve 7, and then the inner wall of the second acid liquid delivery sleeve 7 is polished by the polishing coating 117 on the outer surface of the driven ring 114 on both sides of the second circular frame 111 to clean the attached dirt and foreign particles.

[0041] Then, while the first annular frame 101 moves back and forth and drives the driven ring 114 to be polished and cleaned, the first servo motor 33 is turned on again, and the gear sleeve head 34 at the output end of the first servo motor 33 drives the meshing second gear ring 15 to rotate, so that the first acid liquid delivery sleeve 6 rotates synchronously, and a third gear ring 16 meshing with the first gear ring 109 is also provided on the inner wall of the first acid liquid delivery sleeve 6. Therefore, during the rotation of the first acid liquid delivery sleeve 6, the first gear ring 109 is driven to rotate, and the first gear ring 109 is an integral structure with the outer annular shell 105, and the whole is movably installed on the outer annular surface of the first annular frame 101, and the second electrically controlled magnetic suction heads 108 are fixedly installed on the edges of both sides of the outer annular shell 105, and the second electrically controlled magnetic suction heads 108 are fixedly installed on the edges of both sides of the outer annular shell 105. The head 108 is tightly adsorbed and corresponds to the magnetic block 1110 on the driven ring 114 on the inner wall of the second acid liquid delivery sleeve 7 through its adsorption end, so after the first servo motor 33 is turned on to drive the gear sleeve head 34 at its output end to rotate, the driven rings 114 on both sides of the second circular ring frame 111 can be linked to rotate, and the grinding coating 117 on the outer surface of the driven ring 114 is controlled to fit the inner wall of the second acid liquid delivery sleeve 7 for rotation and cleaning. Because the second circular ring groove 112 on the second circular ring frame 111 is in an unclosed state, during the driving process, the outer circular ring shell 105 does not rotate 360 ​​degrees, but rotates to adapt to the groove of the second circular ring groove 112, that is, the connecting cavity rod 113 is reciprocated and bottomed out inside the groove of the second circular ring groove 112 to ensure stable operation of the device.

[0042] Finally, after the initial grinding and cleaning, the rotation of the outer annular shell 105 drives the driven rings 114 on both sides of the second annular frame 111 to reset, so that the connecting cavity rod 113 returns to the most end position in the second annular groove 112. At this time, the first connecting conduit 115 on the driven ring 114 on the outer side of the second annular frame 111 is facing the sealing port 14 end. At this time, the first servo motor 33 is turned off, and the first annular frame 101 is driven to move straight only by the threaded rod 18 at the output end of the second servo motor 12. The first connecting conduit 115 can be inserted into the interior of the sealing port 14, and connected to one end of the external pull conduit 97 inside the sealing port 14 through the magnetic suction fluid module 19. After forming an integrated structure, it can be connected again through the threaded rod at the output end of the second servo motor 12. 18 continues to reciprocate, so that the magnetic drive module 10 drives the magnetic follower module 11 to polish and clean again along the inside of the second acid liquid delivery sleeve 7, and synchronously controls the follower ring 114 to rotate back and forth to increase the polishing force. Because the first connecting conduit 115 is connected to the external pull conduit 97 at this time, the auxiliary reagents in different fan-shaped storage chambers 91 can be extracted into the annular conduits 116 of the follower rings 114 on both sides through the electric control valve 94, and then diverted to the outer end surface of the polishing coating 117 through the auxiliary liquid injection branch pipe 118 on the annular conduit 116, which is liquid preparation polishing. The order of injecting auxiliary reagents is as described above. After multiple multi-angle coordinated reagent polishing and cleaning, the waste liquid can be finally discharged together through the hydraulic power unit 2 and the hydraulic push disk 8 at the output end.

[0043] like Figures 1 to 10 As shown, the magnetic suction fluid module 19 includes a sealing sleeve 191 fixedly installed on the end face of one side of the external pull-in catheter 97 and clamped in the sealing port 14, a third electrically controlled magnetic suction head 192 is fixedly installed on the outer edge surface of the sealing sleeve 191, a first insertion port 193 is provided inside the open end of the sealing sleeve 191, a plurality of groups of cavities are provided on the outer circular edge of the first insertion port 193, and a reset rod 194 is fixedly installed in each group of cavities, and a limiting groove 195 is provided on the side of each group of cavities, a U-shaped rod 196 that slides and is clamped in the limiting groove 195 on the same side is fixedly installed on the reset end of the reset rod 194, and a first sealing block 197 that is sealed and blocked inside the first insertion port 193 is fixedly installed through the U-shaped rod 196 on each side, and a second insertion port 198 is also provided inside the sealing sleeve 191 at a position close to the first insertion port 193.

[0044] like Figures 1 to 10As shown, the magnetic absorption fluid module 19 also includes a metal adsorption ring 199 fixedly mounted on the outer side surface of the first connecting conduit 115, and an insertion tube 1911 is also fixedly mounted on the outer end surface of the metal adsorption ring 199, and a second sealing block 1910 is also fixedly mounted on the outer annular surface of the insertion tube 1911, and a plurality of leakage ports 1912 are arranged in a circular shape on the protruding end of the insertion tube 1911.

[0045] The magnetic suction fluid module 19 is configured to connect the first connecting conduit 115 and the external pulling conduit 97 as described above, specifically: First, the external pull-out catheter 97 is sealed in the sealing port 14 by the sealing sleeve 191. After the first connecting catheter 115 approaches, the insertion tube 1911 located on the first connecting catheter 115 will first be inserted into the first insertion port 193 and push the first sealing block 197 in the first insertion port 193 to move toward the second insertion port 198, and the inner port radius of the second insertion port 198 is larger than the inner port radius of the first insertion port 193.

[0046] Then, as the first sealing block 197 is further pushed in, the second sealing block 1910 located on the insertion tube 1911 will be inserted into the first insertion port 193 and block the inside of the first insertion port 193, and the metal adsorption ring 199 will fit on the adsorption end face of the third electrically controlled magnetic head 192 on the outer surface of the sealing sleeve 191. At this time, the magnetic end of the third electrically controlled magnetic head 192 is opened to firmly adsorb the metal adsorption ring 199, and in this state, the insertion tube 1911 is also completely inserted into the first insertion port 193, so that the first sealing block 197 is completely pushed into the second insertion port 198.

[0047] Finally, after the insertion tube 1911 drives the first sealing block 197 to extend into the second insertion port 198, the leakage port 1912 located on the insertion tube 1911 will also extend into the second insertion port 198. At this time, it is only necessary to open one end of the electric control valve 94 to allow the reagent in the external pull-out catheter 97 to flow into the leakage port 1912 of the insertion tube 1911 through the second insertion port 198, and enter the first connecting catheter 115 through the leakage port 1912, so that the entire conveying path is connected.

[0048] The configured reset rod 194 is a telescopic rod structure controlled by a reset spring in the prior art. After the inserted through tube 1911 is withdrawn, the first sealing block 197 will be reset under the driving of the reset force, so that the sealing port 14 will return to a sealed state.

[0049] like Figures 1 to 10As shown, a through hole is also opened on the side wall of the injection gun muzzle 4 to penetrate into the interior of the second acid delivery sleeve 7, and a one-way control valve 13 is fixedly installed in the through hole, and a conduit connected to the output end of the tungstic acid storage unit 5 is also fixedly installed through the one-way control valve 13, and an outward-turning maintenance plate 35 is also movably installed on the outer surface of the corrosion-resistant casing 31.

[0050] Among them, the configured one-way control valve 13 is an electrically controlled valve structure capable of one-way flow in the prior art, which is used to control the tungstic acid stored in the tungstic acid storage unit 5 to replenish the second acid liquid delivery casing 7, and the outward-turning maintenance plate 35 is a protective plate structure that can be opened outward, which is used to open the corrosion-resistant casing 31 to facilitate real-time replenishment of reagents to the fan-shaped storage chamber 91 through the rehydration valve head 92.

[0051] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0052] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A hydraulic acid injection device for tungstic acid transportation, comprising an assembly bracket and a hydraulic power unit and a tungstic acid storage unit assembled on the side of the assembly bracket, characterized in that: The outer surface of the hydraulic power unit is provided with an acid delivery unit, the acid delivery unit comprises a corrosion-resistant casing, a first acid delivery casing having a cocentricity is movably installed inside the corrosion-resistant casing, a second acid delivery casing having a cocentricity is fixedly installed inside the first acid delivery casing, a cavity is provided between the corrosion-resistant casing and the first acid delivery casing, an additive delivery module is provided in the cavity, a cavity is also provided between the first acid delivery casing and the second acid delivery casing, a magnetic attraction drive module is provided in the cavity; The output end of the hydraulic power unit is fixedly installed with a hydraulic push disk which is sealed and extends into the second acid liquid delivery sleeve for hydraulic acid injection. The interior of the second acid liquid delivery sleeve is also provided with a magnetic driven module which is placed at the front side of the push end of the hydraulic push disk and corresponds to the magnetic drive module; Among them, the magnetic driven module includes a second circular frame and driven rings movably mounted on both sides of the second circular frame. The magnetic driving module adsorbs the second circular frame and moves back and forth against the inner wall of the second acid delivery sleeve, and drives the driven ring to rotate back and forth to rub the granular impurities.

2. A hydraulic acid injection device for tungstic acid transportation according to claim 1, characterized in that: The corrosion-resistant casing is integrally fixedly installed on the outer surface of the output end of the hydraulic power unit, and an outward expansion cavity is also fixedly installed on the side of the corrosion-resistant casing close to the outer surface of the hydraulic power unit, a first servo motor is fixedly installed in the outward expansion cavity, a gear sleeve is fixedly installed on the output end of the first servo motor, a second gear ring corresponding to the gear sleeve that meshes with the gear sleeve is fixedly installed on the outer annular surface of the first acid liquid delivery casing, a third gear ring is fixedly installed on the inner annular surface of the first acid liquid delivery casing, an injection muzzle is fixedly installed on the output end of the second acid liquid delivery casing, a second servo motor is fixedly installed on the side wall of the injection muzzle, and a threaded rod is fixedly installed on the output end of the second servo motor.

3. A hydraulic acid injection device for tungstic acid transportation according to claim 2, characterized in that: The outer annular surface of the second acid liquid delivery sleeve is provided with a groove for the threaded rod to pass through, and the magnetic drive module includes a first annular frame movably installed on the outer annular surface of the second acid liquid delivery sleeve, and a nut sleeve slidingly sleeved in the groove and meshing with the threaded rod is fixedly installed on the inner annular surface of the first annular frame, and an embedded first electrically-controlled magnetic suction head is also fixedly installed at a position opposite to the nut sleeve on the inner annular surface of the first annular frame, and the magnetic suction end of the first electrically-controlled magnetic suction head is tightly attached to the outer annular surface of the second acid liquid delivery sleeve, and first annular grooves are provided at both side ends of the outer annular surface of the first annular frame.

4. A hydraulic acid injection device for tungstic acid transportation according to claim 3, characterized in that: The magnetic drive module also includes an outer ring shell movably mounted on the outer ring of the first ring frame, a buckle block engaged in the first ring groove is fixedly mounted on the inner ring edge of the outer ring shell, and extended side plates are fixedly mounted on both side walls of the outer ring shell, and second electrically controlled magnetic heads are fixedly mounted on the outer surfaces of the extended side plates, and the magnetic end of the second electrically controlled magnetic head is tightly attached to the outer ring surface of the second acid delivery sleeve, and a first gear ring engaged with a third gear ring is fixedly mounted on the outer ring surface of the outer ring shell.

5. A hydraulic acid injection device for tungstic acid transportation according to claim 4, characterized in that: The magnetic driven module also includes a second circular groove opened on the side of the second circular frame, the second circular groove is a non-closed-loop C-shape as a whole, and a connecting cavity rod is movably inserted and installed through the second circular groove, and driven rings are fixedly installed on both sides of the connecting cavity rod, and a grinding coating that fits the inner circular wall of the second acid liquid delivery sleeve is fixedly installed on the outer circular surface of the driven ring, the grinding coating is also a non-closed-loop C-shape, and a magnetic block corresponding to the second electrically controlled magnetic suction head on the same side is fixedly installed at the position where the grinding coating is not closed.

6. A hydraulic acid injection device for tungstic acid transportation according to claim 5, characterized in that: A circular conduit is fixedly installed inside the driven ring, and a plurality of auxiliary injection branches passing through the surface of the polished coating are connected to the outer circular ring of the circular conduit, and a second connecting conduit is fixedly connected between the circular conduits on both sides of the second circular ring frame through the internal cavity of the connecting cavity rod. A first connecting conduit is also fixedly installed on the circular conduit on the outer side of the second circular ring frame facing the output end of the second acid liquid delivery sleeve, and a sealing opening for inserting the first connecting conduit is opened on the side of the corrosion-resistant casing close to the injection muzzle, and the sealing opening passes through the cavity between the corrosion-resistant casing and the first acid liquid delivery sleeve.

7. A hydraulic acid injection device for tungstic acid transportation according to claim 6, characterized in that: The additive delivery module includes a plurality of groups of fan-shaped storage cavities fixedly mounted on the inner wall of the corrosion-resistant casing, the fan-shaped storage cavities being located as a whole in the cavity between the corrosion-resistant casing and the first acid liquid delivery casing, and each group of fan-shaped storage cavities are independent of each other, and a liquid replenishment valve head is fixedly mounted on the outer annular surface of each group of fan-shaped storage cavities, a circular tube storage cavity is fixedly mounted on the side of the fan-shaped storage cavity facing the output end of the first acid liquid delivery casing, an electric control valve is fixedly mounted on the outer side of the circular tube storage cavity, and a conduit is mounted on the outer side of each group of fan-shaped storage cavities through the circular tube storage cavity and penetrates into the valve body of the electric control valve, a winding cover is fixedly mounted on the side of the electric control valve, a torsion shaft is fixedly mounted at the internal axial position of the winding cover, an external pull conduit is wound around the torsion shaft, one side of the external pull conduit is connected to the output end of the electric control valve, and one side passes through the winding cover and is sealed in the sealing port, and a magnetic suction fluid flow module is also arranged on the end surface of the external pull conduit stuck in the sealing port.

8. A hydraulic acid injection device for tungstic acid transportation according to claim 7, characterized in that: The magnetic suction fluid flow module includes a sealing sleeve fixedly installed on the end face of one side of the external pull-in catheter clamped in the sealing port, a third electrically controlled magnetic suction head is fixedly installed on the outer edge surface of the sealing sleeve, a first insertion port is provided inside the open end of the sealing sleeve, a plurality of groups of cavities are provided on the outer circular ring edge of the first insertion port, and a reset rod is fixedly installed in each group of cavities, and a limiting groove is provided on the side of each group of cavities, a U-shaped rod that slides and is clamped in the limiting groove on the same side is fixedly installed on the reset end of the reset rod, and a first sealing block that is sealed inside the first insertion port is fixedly installed through the U-shaped rod on each side, and a second insertion port is also provided inside the sealing sleeve at a position close to the first insertion port.

9. A hydraulic acid injection device for tungstic acid transportation according to claim 8, characterized in that: The magnetic absorption fluid module also includes a metal adsorption ring fixedly installed on the outer side surface of the first connecting conduit, and an inserted tube is fixedly installed on the outer end surface of the metal adsorption ring, and a second sealing block is fixedly installed on the outer circular ring surface of the inserted tube, and a plurality of leakage ports are arranged in a circular shape on the protruding end of the inserted tube.

10. A hydraulic acid injection device for tungstic acid transportation according to claim 9, characterized in that: A through hole is also provided on the side wall of the injection gun muzzle to penetrate into the interior of the second acid delivery sleeve, and a one-way control valve is fixedly installed in the through hole, and a conduit connected to the output end of the tungstic acid storage unit is also fixedly installed through the one-way control valve, and an outward-turning maintenance plate is also movably installed on the outer surface of the corrosion-resistant casing.

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