Pipe continuous etching production equipment

Abstract

The invention discloses pipe continuous etching production equipment, which comprises an etching tank assembly, and the top of the etching tank assembly is provided with a middle flip assembly and an in-out flip assembly through sealing rubber strips; the liquid pump assembly is communicated with the liquid storage tank through the connecting guide pipe and the connecting joint, and the liquid storage tank is installed on the fixing assembly; the etching groove assembly is provided with a metal groove, and an etching movement assembly is arranged in the metal groove; and a plurality of height adjusting assemblies are symmetrically inserted into the top of the middle flip assembly. According to the invention, the interior of the metal groove is divided into a group of main etching cavities and a plurality of groups of backflow cavities, so that the internal etching process is convenient to observe while gas leakage of the main etching cavities is avoided; it is ensured that the traction process can be conducted in the backflow cavities on the two sides, and the production efficiency is effectively improved; it is ensured that the pipe to be machined is always located below the liquid level during etching, and the etching effect and machining consistency are effectively improved; the treatment liquid is recycled through the return pipeline, so that the production cost is effectively reduced while harmful gas leakage is avoided.

Description

Technical Field

[0001] This invention relates to the field of pipe etching production technology, and in particular to a continuous pipe etching production equipment. Background Technology

[0002] Polytetrafluoroethylene (PTFE) is a high-molecular polymer prepared using tetrafluoroethylene as a monomer. It possesses excellent properties such as heat resistance, cold resistance, acid and alkali resistance, and organic solvent resistance. Furthermore, it has an extremely low surface friction coefficient and excellent biocompatibility, and in recent years has been widely used in the medical industry as a sheath liner. To improve the adhesion and activity of PTFE tube surfaces, a sodium naphthalene treatment solution can be used to modify them. This is achieved by immersion or spraying to disrupt the fluoroplastic structure on the outer surface of the PTFE tube, thereby significantly enhancing the adhesion performance of the plastic tube surface. The sodium naphthalene treatment solution is composed of naphthalene, metallic sodium, and tetrahydrofuran. Its properties are highly susceptible to the effects of water and oxygen. Upon contact with air, moisture triggers the hydrolysis of sodium naphthalene, generating a mixture of sodium hydroxide, naphthol, etc., which destroys the effective components of the treatment solution and leads to a decrease in etching performance.

[0003] Existing etching equipment mostly adopts a closed structure and is continuously filled with inert gases such as nitrogen for protection. Since it is difficult to completely isolate the inlet and outlet of the etching equipment, harmful gas leakage is prone to occur during the etching process. Moreover, the etching effect cannot be directly observed in the closed environment, making it difficult to ensure that the PTFE tube is always submerged below the surface of the sodium naphthalene treatment solution. During mass production, the effective components of the sodium naphthalene treatment solution are gradually consumed as the etching time increases, leading to a decrease in the etching effect and insufficient production stability. During small-batch, multi-specification production, the need to change molds of different sizes requires stopping the line and opening the closed structure. This not only causes the residual treatment solution to oxidize upon contact with air, but also requires a comprehensive cleaning of the internal cavity and flow path system of the equipment. This not only seriously affects production efficiency, but also increases the frequency of harmful gas diffusion due to the opening of the closed structure, increasing the risk of harm to human health. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a continuous etching production equipment for pipes.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a continuous etching production apparatus for pipes, comprising: The etching tank assembly has a middle flip-top assembly and an inlet / outlet flip-top assembly installed on top via a sealing strip, which is used for the sealed transport of the pipe to be processed for continuous etching. A liquid pump assembly is connected to a liquid storage tank via a connecting conduit and a connecting connector. The liquid storage tank is mounted on a fixed assembly and is used for the sealed delivery of the solution to be sprayed for surface treatment. The etching tank assembly is provided with a metal tank, the middle flip-top assembly is located above the middle of the metal tank, and the inlet / outlet flip-top assembly is located above the end of the metal tank, so that the metal tank is divided into a main etching chamber and multiple reflux chambers. The metal groove is equipped with an etching motion component. Guide block molds and pressure plate molds are respectively provided at both ends of the etching motion component. The etching motion component is used to traction and drive the pipe to be processed through the guide block molds and pressure plate molds in the reflux cavity. Multiple height adjustment components are symmetrically inserted at the top of the middle flip-top assembly, and the height adjustment components are used to adjust the height of the pipe.

[0006] In some embodiments, the etching motion assembly includes symmetrically arranged guide shafts that pass through the slider bushing of the etching slider. A fixing ring passes through the end of the guide shaft. A steel wire rope passes through the middle of the etching slider. A rope clamp passes through the steel wire rope. The end of the steel wire rope is wound around a rotating pulley and a rotating drum. The rotating pulley and the rotating drum are detachably connected to the side of the metal groove by fasteners. A fixing hook is screwed to one side of the etching slider.

[0007] In some embodiments, a connecting hinge is symmetrically arranged on one side of the metal trough, and a snap ring is symmetrically arranged on the other side of the metal trough. The connecting hinge is detachably connected to the metal trough, the middle flip-top assembly, and the inlet / outlet flip-top assembly. An overflow port, an air inlet, and a liquid inlet are provided on one side of the middle of the metal trough. A liquid outlet is provided at the middle and end of the bottom of the metal trough. A first connector assembly is inserted into the overflow port and the air inlet. A second connector assembly is inserted into the liquid inlet. A third connector assembly is inserted into the liquid outlet at the middle. A fourth connector assembly is inserted into the liquid outlet at the end.

[0008] In some embodiments, the first connector assembly includes a plurality of first inlet connectors disposed inside the metal groove, the first inlet connectors being screwed to a first internal thread connector via a first gasket, and the first internal thread connector being screwed to a first threaded quick connector via a first ball valve; The second connector assembly includes a second inlet connector disposed inside the metal tank. The second inlet connector is screwed to a second internal thread connector via an inlet baffle. The second internal thread connector is screwed to a second threaded quick connector via a second ball valve.

[0009] In some embodiments, the third connector assembly includes a third internal thread connector disposed outside the metal groove, the third internal thread connector being screwed to a third threaded quick connector via a third ball valve; The fourth connector assembly includes a fourth internal thread connector disposed on the outside of the metal groove, which is screwed to a fourth threaded quick connector.

[0010] In some embodiments, the intermediate flip cover assembly and the inlet / outlet flip cover assembly are fitted with a sealing strip, which is disposed on sheet metal sheets near the middle on both sides of the metal groove. The intermediate flip cover assembly includes an intermediate opening flip cover, and a second buckle ring is provided on one side of the intermediate opening flip cover. The inlet / outlet flip cover assembly includes an inlet / outlet flip cover, and a first buckle ring is provided on one side of the inlet / outlet flip cover.

[0011] In some embodiments, the height adjustment assembly includes a connecting rod, the bottom of which passes through a central opening flap and is inserted into a pressing block, and a limiting block is mounted on the top of the connecting rod via a limiting screw, with an adjustment handle mounted above the limiting block.

[0012] In some embodiments, a control unit is provided on the top of the liquid pump assembly, and a liquid pump inlet and a liquid pump outlet are symmetrically arranged on the side of the liquid pump assembly. The top of the liquid storage tank is respectively provided with an outlet, a reflux port, and a filling port. The liquid pump inlet and the outlet are connected through a first conduit. The liquid pump outlet and the second threaded quick connector are connected through a second conduit. The reflux port, the outlet, and the overflow port are connected through a fifth conduit. The fifth conduit is connected to a third conduit through a first connector. The third conduit is connected to a sixth conduit and a first connector through a second connector.

[0013] In some embodiments, the fixing component includes a supporting base plate, a limiting side plate is provided on the supporting base plate, a liquid storage tank is provided inside the limiting side plate, and a height upright is provided through the edge of the supporting base plate, the height upright being detachably connected to the supporting base plate by an adjusting nut.

[0014] In some embodiments, the system further includes an air source connected to an air inlet via a flow meter, an regulating valve and a pressure gauge, and a purification unit with a horn-shaped mask housing at its end.

[0015] The present invention has the following beneficial effects: 1. In this invention, the etching tank assembly is provided with a metal tank, and a transparent middle flip-top assembly and an inlet / outlet flip-top assembly are provided above the metal tank and are sealed by a sealing strip. This can divide the inside of the closed metal tank into a main etching chamber and multiple reflux chambers, ensuring that the pipe to be processed can always be in a sealed and protected state when it is being etched in the main etching chamber, thus avoiding gas leakage from the main etching chamber and facilitating observation of the internal etching process. 2. In this invention, an etching motion component is provided inside the metal tank. Guide block molds and pressure plate molds are provided at both ends of the etching motion component. These are used to pull and drive the pipe to be processed through the guide block molds and pressure plate molds in the reflux cavity. This ensures that the traction process can be carried out in the reflux cavities on both sides, avoiding gas leakage in the main etching cavity and effectively improving production efficiency. 3. In this invention, multiple sets of height adjustment components are symmetrically inserted at the top of the middle flip-top assembly, which can adjust the height of the tube to ensure that the tube to be processed is always below the liquid surface during etching, effectively improving the etching effect and processing consistency. 4. In this invention, the liquid pump assembly and the storage tank are connected by connecting pipes and connectors, and together with the gas source and regulating valve, they form a circulation loop. The delivery parameters of the treatment liquid can be flexibly adjusted by the control unit regulating valve and pressure gauge, and the treatment liquid can be recycled through the return pipeline, which avoids the leakage of harmful gases and effectively reduces production costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the continuous etching production equipment for pipes proposed in this invention. Figure 1 ; Figure 2 An exploded view of the continuous etching production equipment for pipes proposed in this invention. Figure 1 ; Figure 3 An exploded view of the continuous etching production equipment for pipes proposed in this invention. Figure 2 ; Figure 4 An exploded view of the continuous etching production equipment for pipes proposed in this invention. Figure 3 ; Figure 5 This is a schematic diagram of the structure of the continuous etching production equipment for pipes proposed in this invention. Figure 2 ; Figure 6 An exploded view of the continuous etching production equipment for pipes proposed in this invention. Figure 4 ; Figure 7 This is a schematic diagram of the structure of the continuous etching production equipment for pipes proposed in this invention. Figure 3 ; Figure 8 An exploded view of the continuous etching production equipment for pipes proposed in this invention. Figure 5 ; Figure 9 This is a schematic diagram of the structure of the continuous etching production equipment for pipes proposed in this invention. Figure 4 ; Figure 10 An exploded view of the continuous etching production equipment for pipes proposed in this invention. Figure 6 ; Figure 11 This is a schematic diagram of the structure of the continuous etching production equipment for pipes proposed in this invention. Figure 5 ; Figure 12 This is a schematic diagram of the structure of the continuous etching production equipment for pipes proposed in this invention. Figure 6 ; Figure 13 This is a schematic diagram of the structure of the continuous etching production equipment for pipes proposed in this invention. Figure 7 ; Figure 14 This is a schematic diagram of the structure of the continuous etching production equipment for pipes proposed in this invention. Figure 8 ; Figure 15 This is a schematic diagram of the structure of the continuous etching production equipment for pipes proposed in this invention. Figure 9 ; Figure 16 for Figure 15 Enlarged diagram of point A in the middle.

[0017] Legend: 1000, Etching apparatus; 1100, Etching tank assembly; 1110, Metal tank; 1111, Liquid inlet; 1112, Air inlet; 1113, Overflow outlet; 1120, Etching motion assembly; 1121, Guide shaft; 1122, Fixing ring; 1123, Etching slider; 1124, Slider bushing; 1125, Fixing hook; 1126, Steel wire rope; 1127, Rope clamp; 1128, Rotating pulley; 1129, Rotating drum; 1130, Guide block mold; 1140, Pressure plate mold; 1150, First connector assembly; 1151, First inlet connector; 1152, First gasket; 1153, First internal thread connector; 115 4. First ball valve; 1155. First threaded quick coupling; 1160. Second coupling assembly; 1161. Second inlet coupling; 1162. Inlet baffle; 1163. Second gasket; 1164. Second female thread coupling; 1165. Second ball valve; 1166. Second threaded quick coupling; 1170. Third coupling assembly; 1171. Third female thread coupling; 1172. Third ball valve; 1173. Third threaded quick coupling; 1180. Fourth coupling assembly; 1181. Fourth female thread coupling; 1182. Fourth threaded quick coupling; 1200. Inlet / outlet flap assembly; 1201. Inlet / outlet flap; 1203. First snap-lock ring; 130 0. Middle flip cover assembly; 1301. Middle opening flip cover; 1302. Second latch ring; 1400. Height adjustment assembly; 1401. Pressing block; 1402. Connecting rod; 1403. Limiting block; 1404. Limiting screw; 1405. Adjusting handle; 1500. Sealing strip; 1600. Connecting hinge; 1700. Hook and loop ring; 2000. Extraction and circulation device; 2100. Liquid pump assembly; 2101. Control unit; 2102. Liquid pump inlet; 2103. Liquid pump outlet; 2200. Liquid storage tank; 2201. Liquid outlet; 2202. Return port; 2203. Liquid filling port; 2300. Fixing assembly; 2301. Support 2302. Base plate; 2303. Limiting side plate; 2304. Height upright; 2305. Adjusting nut; 3006. Gas protection device; 3007. Gas source; 3008. Regulating valve; 3009. Pressure gauge; 3000. Flow meter; 4000. Gas purification device; 4001. Purification unit; 4002. Horn mask housing; 5000. Connecting pipeline device; 5100. Connecting conduit; 5101. First conduit; 5102. Second conduit; 5103. Third conduit; 5104. Fourth conduit; 5105. Fifth conduit; 5106. Sixth conduit; 5200. Connecting joint; 5201. First joint; 5202. Second joint. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] This application provides a continuous etching production equipment for pipes, solving the problems of harmful gas leakage during the etching process in existing technologies. Furthermore, the enclosed environment makes it difficult to visually observe the etching effect, thus hindering the assurance that the PTFE pipe remains submerged below the sodium naphthalene treatment solution, severely impacting production efficiency. Opening the enclosed structure also increases the frequency of harmful gas diffusion, raising the risk of harm to human health. This application addresses these issues by dividing the metal tank into a main etching chamber and multiple recirculation chambers. This prevents gas leakage from the main etching chamber while facilitating observation of the internal etching process. It ensures the traction process can be carried out in the recirculation chambers on both sides, effectively improving production efficiency. It ensures the pipe to be processed remains below the liquid surface during etching, effectively improving the etching effect and processing consistency. Finally, it recycles the treatment solution through the recirculation pipeline, preventing harmful gas leakage and effectively reducing production costs.

[0020] Please refer to the following examples for details: Reference Figures 1-16 The present invention provides an embodiment of a continuous etching production equipment for pipes, the specific structure of which includes: an etching device 1000, an extraction and circulation device 2000, a gas protection device 3000, a gas purification device 4000, and a pipeline connection device.

[0021] The etching apparatus 1000 consists of an etching tank assembly 1100, an inlet / outlet flip-top assembly 1200, an intermediate flip-top assembly 1300, and a height adjustment assembly 1400. For example, the top end face of the etching tank assembly 1100 is sealed with an intermediate flip-top assembly 1300 and an inlet / outlet flip-top assembly 1200 by a sealing strip 1500, forming a sealable cavity structure for continuously conveying the tube to be processed in a closed environment to complete the etching operation. Furthermore, the etching tank assembly 1100 includes a metal tank 1110 disposed on the production station, a middle flip-top assembly 1300 disposed above the middle part of the metal tank 1110, and an inlet / outlet flip-top assembly 1200 disposed above the two ends of the metal tank 1110, so that the metal tank 1110 can be divided into a main etching chamber and multiple reflux chambers. Understandably, both the intermediate flip-top assembly 1300 and the inlet / outlet flip-top assembly 1200 are made of transparent material with high light transmittance, forming a visual operation window above the metal tank 1110. Operators can observe in real time whether the inner liner tube is below the etching liquid level. At the same time, the flip-top assembly is tightly pressed and sealed to the end face of the metal tank 1110 by the sealing strip 1500. This ensures that the tube to be processed is always in a sealed protective atmosphere when the etching reaction takes place in the main etching chamber, effectively preventing harmful gases in the main etching chamber from leaking out. It also enables convenient production and maintenance operations through the opening and closing of the flip-top.

[0022] In some embodiments, please continue reading Figures 1-16 The metal groove 1110 is equipped with an etching motion component 1120. At both ends of the etching motion component 1120, there are corresponding guide block molds 1130 and pressure plate molds 1140, which are used to pull and drive the pipe to be processed smoothly through the guide block molds 1130 and pressure plate molds 1140 in the area of ​​the reflux cavity, so as to ensure that the pipe passes through the main etching cavity at a constant speed and ensure the uniformity of the etching effect. Furthermore, the etching motion assembly 1120 includes two symmetrically arranged guide shafts 1121. The guide shafts 1121 pass through the pre-set slider bushings 1124 of the etching slider 1123. Both ends of the guide shafts 1121 are fitted with retaining rings 1122 to limit the axial displacement of the guide shafts 1121. A through hole is formed in the middle of the etching slider 1123, and a steel wire rope 1126 passes through this through hole. The connection between the steel wire rope 1126 and the etching slider 1123 is open. Two sets of rope clamps 1127 are used to tighten and fix the wire rope 1126 to prevent slippage and displacement during transmission. The two ends of the wire rope 1126 are respectively wound around the grooves of the rotating pulley 1128 and the rotating drum 1129. The rotating pulley 1128 and the rotating drum 1129 are detachably connected to the side end face of the metal groove 1110 by fasteners, which facilitates maintenance and replacement in the future. A fixing hook 1125 is fixed on one side of the etched slider 1123 by a threaded connection.

[0023] For example, the slider bushing 1124 is pre-pressed into the countersunk hole of the etched slider 1123 using an interference fit assembly method, and each set of etched sliders 1123 is equipped with two sets of slider bushings 1124. The bushing material is made of plastic parts with extremely low surface friction coefficient such as nylon or PTFE, which can effectively reduce the sliding friction resistance between the guide shaft 1121 and the etched slider 1123, reduce component wear and improve transmission accuracy. The guide shaft 1121 is made of high-strength metal. The two sets of guide shafts 1121 are symmetrically and parallelly distributed. Their assembly path passes through the fixing ring 1122, the mounting hole at the end of the metal groove 1110, the slider bushing 1124, the through hole on the right side of the metal groove 1110, and the fixing ring 1122 on the other side. The fixing ring 1122 is symmetrically attached to the outer walls of the left and right sides of the metal groove 1110 and is locked and fixed at the end of the guide shaft 1121 by set screws. The guide shaft 1121 and the slider bushing 1124 adopt a clearance fit design. The operator can drive the etching slider 1123 to move smoothly back and forth along the axial direction of the guide shaft 1121 by pulling the steel wire rope 1126 left and right. When installing the rotating pulley 1128, fasteners such as long screws pass through the rotating pulley 1128, the first nut, the pre-set oblong hole on the side wall of the metal groove 1110, and the second nut in sequence. Among them, a slight gap is reserved between the nut on the side closer to the rotating pulley 1128 and the end face of the pulley to ensure that the rotating pulley 1128 can rotate freely without jamming. The nuts on both sides of the metal groove 1110 lock the long screw in place. Using the height adjustment margin of the oblong hole on the metal groove 1110, the operator can control the elongation of the long screw by adjusting the position of the nuts on both sides, thereby precisely adjusting the axial height and horizontal position of the rotating pulley 1128 to ensure that the tension of the wire rope 1126 is in the optimal state.

[0024] When installing the rotating roller 1129, fasteners such as long screws pass through the rotating roller 1129, two nuts, the round hole on the side wall of the metal groove 1110, and another nut in sequence. The nut on the side closer to the rotating roller 1129 also leaves a gap with the end face of the roller to ensure smooth rotation of the roller. After the nuts on both sides of the metal groove 1110 are tightened with long screws, the elongation of the long screws can be changed by adjusting the position of the nut 2304, thereby adjusting the axial position of the rotating roller 1129. The wire rope 1126, which passes through the round hole on the right side of the metal groove 1110, first passes through the groove of the rotating pulley 1128 to change direction, and then passes vertically downward from the left side of the rotating drum 1129. The pulling direction of the wire rope 1126 on the right side is adjusted by the cooperation of the pulley and the drum to avoid interference between the wire rope 1126 and the components of the subsequent process of the production line, and to ensure the stability of the transmission process.

[0025] Correspondingly, the guide block mold 1130 and the pressure plate mold 1140 are both embedded in the grooves pre-set on both sides inside the metal groove 1110, and a reasonable gap is reserved between the outer wall of the mold and the inner wall of the groove, which can meet the needs of quick assembly and disassembly of the mold and avoid deformation and damage caused by excessive tightness of the mold assembly; the pressure plate mold 1140 is arranged in a stacked manner directly above the guide block mold 1130, and arc-shaped grooves are opened on the opposite end faces respectively. After the mold is closed, they together form a set of circular hole channels that match the outer diameter of the pipe to be processed. The inner liner pipe to be processed passes through the circular hole channel, and a small gap is reserved between the outer wall of the pipe and the inner wall of the circular hole channel, which can guide and limit the pipe, prevent the pipe from deviating during the movement, and reduce the frictional resistance between the mold and the pipe; Two sets of guide block molds 1130 and pressure plate molds 1140 are symmetrically arranged. The side of the guide block mold 1130 with the flared guide structure faces the inlet direction of the metal groove 1110, so that the pipe to be processed can enter the round hole channel more smoothly and avoid jamming or scratching at the end of the pipe. Both the guide block mold 1130 and the pressure plate mold 1140 are pre-machined with threaded holes. During installation and disassembly, the lifting operation can be achieved by screwing long screws and other fasteners into the threaded holes, without the operator having to directly touch the mold with their hands, effectively avoiding the harm to the human body caused by the sodium naphthalene treatment liquid remaining on the mold surface. The guide block mold 1130 and the pressure plate mold 1140 are matched with the specifications of the inner liner tube to be processed. For inner liner tubes of different diameters, only the mold of the corresponding size needs to be replaced to complete the production switch. There is no need to modify the etching tank assembly 1100, which effectively improves the compatibility of the device with the needs of multi-specification small-batch production.

[0026] It is understandable that the two ends of the etching motion component 1120 are respectively configured with guide block mold 1130 and pressure plate mold 1140, which pull and drive the tube to be processed to complete the die-through movement in the return cavity. This isolates the traction operation of the tube from the sealed environment of the main etching cavity, which not only avoids the leakage of harmful gases caused by the damage to the airtightness of the main etching cavity during the traction process, but also ensures the consistency of the etching time of the tube through stable traction speed control, effectively improving the overall production efficiency and product yield.

[0027] In some embodiments, please continue reading Figures 1-16 Several sets of connecting hinges 1600 are symmetrically installed on one side wall of the metal channel 1110, and several sets of hook-and-loop rings 1700 are symmetrically arranged on the other side wall of the metal channel 1110. One end of the connecting hinge 1600 is detachably connected to the side wall of the metal channel 1110, and the other end is detachably connected to the side of the middle flip assembly 1300 and the entry / exit flip assembly 1200, so as to realize the flexible connection between the flip assembly and the metal channel 1110.

[0028] Furthermore, both the connecting hinge 1600 and the latch ring 1700 are fixed to the side wall of the metal channel 1110 by threaded connection, which facilitates disassembly, replacement and maintenance in the future. The number of connecting hinges 1600 and latches can be adjusted according to the length of the metal channel 1110 and the weight of the flip assembly. Multiple sets are usually set to ensure the stability of the connection and the uniformity of the force. The connecting hinge 1600 provides a rotatable pivot point for the flip assembly, and the latch ring 1700 can cooperate with the latch ring on the flip assembly to lock it. This not only enables the flexible opening and closing of the flip assembly, but also helps to improve the sealing performance after the cover is closed, ensuring the airtightness of the main etching cavity.

[0029] In some embodiments, please continue reading Figures 1-16 An overflow port 1113, an air inlet 1112, and a liquid inlet 1111 are provided on one side wall of the middle part of the metal tank 1110. A liquid outlet 2201 is provided at the middle and end positions of the bottom of the metal tank 1110. A first connector assembly 1150 is installed at the overflow port 1113 and the air inlet 1112, a second connector assembly 1160 is installed at the liquid inlet 1111, a third connector assembly 1170 is installed at the liquid outlet 2201 at the middle of the bottom, and a fourth connector assembly 1180 is installed at the liquid outlet 2201 at the end of the bottom.

[0030] Furthermore, the first connector assembly 1150 includes multiple sets of first inlet connectors 1151 disposed inside the metal groove 1110. The first inlet connectors 1151 are screwed to the first internal thread connectors 1153 via the first gasket 1152. The first internal thread connectors 1153 are screwed to the first threaded quick connectors 1155 via the first ball valve 1154. For example, the first inlet connector 1151 and the first gasket 1152 are disposed on the inner side wall of the metal tank 1110, while the first internal thread connector 1153, the first ball valve 1154 and the first threaded quick connector 1155 are located on the outer side of the metal tank 1110. All components are fixed by threaded connection, and all threaded engagement positions are wrapped with raw rubber tape to enhance the sealing performance of the threaded connection and prevent leakage of treatment fluid or gas.

[0031] Furthermore, two sets of the first connector assembly 1150 are provided. The first connector assembly 1150 located on the left connects the overflow port 1113 to the return pipeline of the extraction and circulation device 2000. When the liquid level of the sodium naphthalene treatment solution in the metal tank 1110 exceeds the preset warning line, the excess treatment solution can be returned to the storage tank 2200 through this connector assembly, so as to achieve precise control of the liquid level of the treatment solution. Correspondingly, the first connector assembly 1150 located in the middle is connected to the gas protection device 3000. Inert protective gases such as nitrogen can be continuously introduced into the internal cavity of the metal tank 1110 from here to form a stable inert protective atmosphere and inhibit the hydrolysis and oxidation reaction of the sodium naphthalene treatment solution.

[0032] Correspondingly, the second connector assembly 1160 includes a second inlet connector 1161 disposed inside the metal groove 1110. The second inlet connector 1161 is screwed to the second internal thread connector 1164 through the liquid inlet baffle 1162. The second internal thread connector 1164 is screwed to the second threaded quick connector 1166 through the second ball valve 1165. For example, the second inlet connector 1161 and the liquid inlet baffle 1162 are both disposed on the inner side wall of the metal tank 1110. The liquid inlet baffle 1162 adopts an arc-shaped flow guiding structure design. When the liquid inlet flow rate is large, it can effectively buffer the impact force of the treatment liquid, avoid the treatment liquid from being sprayed directly and splashing, and prevent the treatment liquid from splashing into the non-etched area, causing waste or component corrosion. The second internal thread connector 1164, the second ball valve 1165 and the second threaded quick connector 1166 are located on the outside of the metal tank 1110. Each connection part is also connected by threads and sealed with raw rubber tape.

[0033] Furthermore, the second connector assembly 1160 is arranged on the right side wall of the metal tank 1110, and its outer port is connected to the outlet 2201 pipeline of the extraction and circulation device 2000. The sodium naphthalene treatment solution in the storage tank 2200 can be stably transported to the internal cavity of the metal tank 1110 through the connector assembly under the drive of the liquid pump, so as to provide a continuous and stable liquid source supply for the etching reaction.

[0034] Correspondingly, the third connector assembly 1170 includes a third internal thread connector 1171 disposed on the outside of the metal groove 1110, and the third internal thread connector 1171 is screwed to the third threaded quick connector 1173 through the third ball valve 1172; the fourth connector assembly 1180 includes a fourth internal thread connector 1181 disposed on the outside of the metal groove 1110, and the fourth internal thread connector 1181 is screwed to the fourth threaded quick connector 1182. For example, the third internal threaded connector 1171, the third ball valve 1172 and the third threaded quick connector 1173 are all assembled on the outside of the bottom of the metal groove 1110, and the fourth internal threaded connector 1181 and the fourth threaded quick connector 1182 are also installed on the outside of the bottom of the metal groove 1110. All threaded connection positions are wrapped with Teflon tape to ensure a sealing effect.

[0035] Furthermore, one set of third connector assembly 1170 is provided, located in the middle of the bottom of the metal tank 1110, and two sets of fourth connector assembly 1180 are provided, located on both sides of the bottom of the metal tank 1110. The outer ports of the third connector assembly 1170 and the fourth connector assembly 1180 are connected to the return port 2202 of the extraction and circulation device 2000. The processing liquid that has participated in the etching reaction in the metal tank 1110 can be returned to the storage tank 2200 through these connector assemblies, realizing the recycling and reuse of the processing liquid, and effectively reducing the cost of processing liquid loss.

[0036] In some embodiments, please continue reading Figures 1-16 The bottom surfaces of the middle flip-top assembly 1300 and the entry / exit flip-top assembly 1200 are tightly fitted with the sealing strip 1500, which is fixedly laid on the sheet metal sheets on both sides of the metal groove 1110 near the middle.

[0037] For example, a closed sealing strip 1500 is provided between the mating surfaces of the entry / exit flip assembly 1200, the middle flip assembly 1300 and the metal channel 1110 assembly. The strip is positioned to cover the inner area of ​​the connecting hinge 1600, the buckle and the sheet metal sheets near the middle on both sides of the metal channel 1110, and to be completely fitted to the upper surface of the metal channel 1110 assembly, ensuring that the flip assembly can achieve a full circumferential seal after closing.

[0038] Furthermore, the main body of the intermediate flip cover assembly 1300 is the intermediate opening flip cover 1301, and a second latching ring 1302 is fixedly provided on one side edge of the intermediate opening flip cover 1301; the main body of the inlet / outlet flip cover assembly 1200 is the inlet / outlet flip cover 1201, and a first latching ring 1203 is correspondingly provided on one side edge of the inlet / outlet flip cover 1201, which can be locked with the latching pull ring 1700 on the side wall of the metal groove 1110; both the inlet / outlet flip cover 1201 and the intermediate opening flip cover 1301 are made of highly transparent hard material to ensure that the operator can clearly observe the etching reaction process inside the cavity; the intermediate opening flip cover 1301 also has multiple sets of D-shaped holes to provide an adapter interface for the installation of the height adjustment assembly 1400.

[0039] Furthermore, two sets of inlet / outlet flip-cover assemblies 1200 are provided, respectively installed at the two ends above the metal channel 1110 assembly; one set of middle flip-cover assemblies 1300 is provided, installed at the middle position above the metal channel 1110 assembly; both the inlet / outlet flip-cover assemblies 1200 and the middle flip-cover assemblies 1300 are flexibly connected to the metal channel 1110 assembly via connecting hinges 1600, allowing the flip-cover assemblies to open and close flexibly around the connecting hinges 1600, facilitating daily maintenance and troubleshooting of the device; when the inlet / outlet flip-cover assemblies 1200 and the middle flip-cover 1301 are in the closed state, the operator interlocks and locks the latch ring 1700 with the latch buckle ring, the bottom end face of the flip-cover assembly will form a uniform extrusion force on the sealing strip 1500, causing the sealing strip 1500 to elastically deform, thereby forming a gapless sealing structure on the upper surface of the metal channel 1110, effectively preventing harmful gases generated during the etching process from escaping and ensuring the safety of the production environment.

[0040] In some embodiments, please continue reading Figures 1-16 Multiple height adjustment components 1400 are symmetrically inserted on the top of the middle flip-top component 1300. The height adjustment components 1400 are used to adjust the height of the pipe.

[0041] For example, the height adjustment assembly 1400 includes a connecting rod 1402, the bottom of which passes through the central opening flap 1301 and is inserted into the pressing block 1401, and the top of the connecting rod 1402 is fitted with a limiting block 1403 by a limiting screw 1404, and an adjustment handle 1405 is installed above the limiting block 1403.

[0042] Furthermore, the connecting rod 1402 passes through the D-shaped hole of the middle opening flip cover 1301, the limiting block 1403, and the adjusting handle 1405 in sequence; wherein, the bottom end of the connecting rod 1402 passes through the preset D-shaped hole of the middle opening flip cover 1301 and is inserted into the slot of the pressing block 1401, and the top end of the connecting rod 1402 is fitted with the limiting block 1403 through the limiting screw 1404, and the adjusting handle 1405 is fitted on the top of the limiting block 1403 for easy manual operation.

[0043] Furthermore, the assembly path of the connecting rod 1402 passes sequentially through the D-shaped hole of the intermediate opening flap 1301, the center hole of the limiting block 1403, and the mounting hole of the adjusting handle 1405; the bottom of the connecting rod 1402 and the slot of the pressing block 1401, and the top of the connecting rod 1402 and the adjusting handle 1405 are all locked and fixed by set screws to prevent the components from loosening during the adjustment process; the connecting rod 1402 adopts a metal rod structure with a D-shaped cross section, which forms a precise clearance fit with the D-shaped hole on the intermediate opening flap 1301, which can not only ensure that the connecting rod 1402 slides smoothly up and down along the axial direction of the D-shaped hole, but also prevent the connecting rod 1402 from rotating circumferentially during the adjustment process through the anti-rotation limiting effect of the D-shaped structure, thus improving the adjustment accuracy; Furthermore, the number of height adjustment components 1400 can be adjusted according to the length and weight of the pipe to be processed. The coordinated action of multiple components can achieve uniform pressure on the pipe. The axial position locking of the connecting rod 1402 is achieved by the limiting screw 1404. When adjusting the height, the operator first loosens the limiting screw 1404 to allow the connecting rod 1402 to slide freely. Then, by rotating the adjusting handle 1405, the connecting rod 1402 is driven to move up and down along the D-shaped hole. After the connecting rod 1402 drives the pressing block 1401 to adjust the pipe to the preset immersion position, the limiting screw 1404 is tightened again to complete the precise fixation of the pipe height position.

[0044] Understandably, since the pipes will float on the etching solution, the height adjustment component 1400 can be used to press the pipes down to a certain position below the liquid level, thereby ensuring that pipes of different diameters are always below the surface of the treatment solution during the etching process. This effectively avoids the problem of insufficient etching caused by the pipes floating, and significantly improves the consistency and stability of the etching effect.

[0045] In some embodiments, please continue reading Figures 1-16 The extraction and circulation device 2000 consists of a liquid pump assembly 2100, a liquid storage tank 2200, and a fixing assembly 2300; For example, the liquid pump assembly 2100 is connected to the liquid storage tank 2200 via a connecting pipeline device 5000, which includes a connecting conduit 5100 and a connecting connector 5200; while the liquid storage tank 2200 is mounted on the fixing assembly 2300 for sealed delivery of the solution to be sprayed for surface treatment. Furthermore, a control unit 2101 is provided on the top of the liquid pump assembly 2100, which can adjust the flow rate and the forward and reverse flow direction; Correspondingly, the liquid pump assembly 2100 is symmetrically provided with a liquid pump inlet 2102 and a liquid pump outlet 2103 on its side. The liquid pump inlet 2102 is connected to the liquid outlet 2201 through a first conduit 5101, and the liquid pump outlet 2103 is connected to the second threaded quick connector 1166 located on the right side of the etching tank assembly 1100 through a second conduit 5102. The top of the liquid storage tank 2200 is provided with a liquid outlet 2201, a return port 2202, and a liquid injection port 2203. 202 is connected to the outlet 2201 and the overflow outlet 1113 through the fifth conduit 5105. The fifth conduit 5105 is connected to the third conduit 5103 through the first connector 5201. The third conduit 5103 is connected to the sixth conduit 5106 and the first connector 5201 through the second connector 5202. The injection port 2203 is used to add fresh treatment fluid. When no treatment fluid is added, this port is closed to prevent air from entering the interior of the storage tank 2200 and causing the treatment fluid to be oxidized. For example, the fixing component 2300 includes a supporting base plate 2301, on which multiple limiting side plates 2302 are arranged. The inner side of the limiting side plates 2302 forms a limiting space that matches the shape of the liquid storage tank 2200, for limiting and fixing the liquid storage tank 2200. Multiple height uprights 2303 are arranged through the edge of the supporting base plate 2301. Adjusting nuts 2304 are threaded onto the height uprights 2303. The operator can change the axial position of the height uprights 2303 by rotating the adjusting nuts 2304, thereby realizing the height adjustment and clamping fixation of the liquid storage tank 2200, ensuring that the liquid storage tank 2200 remains stable during operation.

[0046] In some embodiments, please continue reading Figures 1-16 It also includes an air source 3001, which is connected to the air inlet 1112 via a flow meter 3004. The air source 3001 is equipped with a regulating valve 3002 and a pressure gauge 3003.

[0047] For example, the protective gas output by the gas source 3001 is high-purity nitrogen. When the nitrogen flows through the pipeline sequentially through the regulating valve 3002, pressure gauge 3003, and flow meter 3004, the operator can adjust the output pressure of the gas through the regulating valve 3002 and monitor the current gas pressure value in real time through the pressure gauge 3003 to ensure that the pressure parameters meet the process requirements. The flow meter 3004 has an independent flow valve, which can be adjusted to precisely control the gas flow rate. At the same time, the scale of the flow meter 3004 can provide real-time feedback on the current gas flow rate value, which is convenient for the operator to make dynamic adjustments according to the etching process requirements. The nitrogen is connected to the first threaded quick connector 1155 in the middle of the side of the metal tank 1110 through the pipeline and is continuously introduced into the internal cavity of the etching tank to gradually replace the air in the cavity and form a stable inert protective atmosphere. This fundamentally inhibits the reaction between the sodium naphthalene treatment solution and the moisture and oxygen in the air, ensuring the stability of the etching performance of the treatment solution.

[0048] In some embodiments, please continue reading Figures 1-16 It also includes a gas purification device 4000, which consists of a purification unit 4001 and a horn mask shell 4002; For example, the gas purification device 4000 extracts the harmful gas generated in the etching chamber into the purification unit 4001 by negative pressure extraction. After purification processes such as adsorption and filtration, the gas meets the emission standards before being discharged. Furthermore, the gas purification device 4000 is also equipped with a dedicated adjustment and display unit module, which can display the exhaust gas extraction flow rate in real time and flexibly adjust the flow parameters according to actual working conditions to match the nitrogen flow rate of the intake system, ensuring a stable inert atmosphere inside the chamber while achieving efficient extraction of harmful gases.

[0049] Furthermore, two sets of speaker mask shells 4002 are provided at the end of the purification unit 4001. The arrangement of the speaker mask shells 4002 corresponds to the inlet and outlet positions of the metal trough 1110. The speaker mask shells 4002 can be arbitrarily adjusted and fixed by the connected robotic arm according to the actual situation to achieve the best purification effect.

[0050] It is understandable that the liquid pump assembly 2100 is connected to the liquid storage tank 2200 through the connecting conduit 5100 and the connecting connector 5200, and forms a circulation loop with the gas source 3001 and the regulating valve 3002. The delivery parameters of the treatment liquid can be flexibly adjusted by the regulating valve 3002 and the pressure gauge 3003 through the control unit 2101, and the treatment liquid can be recycled through the return pipeline, which avoids the leakage of harmful gases and effectively reduces production costs.

[0051] Working principle: Fill the storage tank 2200 with an appropriate amount of treatment liquid, seal the lid of the storage tank 2200, place the storage tank 2200 on the fixing component 2300 and clamp it. When connecting the pipelines, one end of the first conduit 5101 is connected to the outlet 2201 of the storage tank 2200, and the other end is connected to the inlet 2102 of the pump assembly 2100 in the extraction and circulation device 2000; one end of the second conduit 5102 is connected to the outlet 2103 of the pump assembly 2100 in the extraction and circulation device 2000, and the other end is connected to the second connector assembly 1160 located on the right side of the etching device 1000; one end of the third conduit 5103 is connected to the outlet of the flow meter 3004 in the gas protection device 3000, and the other end is connected to the first connector assembly 1150 located in the middle of the etching device 1000; the lower end of the first connector 5201 is connected to the first connector 5204 via a set of fourth conduits 5104. The upper ends of the two connectors 5202 are connected in series, and then the lower end of the second connector 5202 is connected to the return port 2202 of the liquid storage tank 2200 in the extraction circulation device 2000 through a set of fourth conduits 5104. Then, the fourth connector assembly 1180 in the etching device 1000 is connected in series with the upper end of the first connector 5201 through a set of fourth conduits 5104. One end of each of the two sets of fifth conduits 5105 is connected to the third connector assembly 1170 in the etching device 1000, and the other end is connected to the left and right sides of the first connector 5201 respectively. One end of the sixth conduit 5106 is connected to the first connector assembly 1150 located on the left side in the etching device 1000, and the other end is connected to the second connector 5202. Loosen the limiting screw 1404 in the height adjustment assembly 1400, pull the connecting rod 1402 to the highest position, and then tighten the limiting screw 1404; according to the specifications of the inner liner tube to be etched, find two sets of corresponding guide block molds 1130 and pressure plate molds 1140; place the two sets of guide block molds 1130 in the grooves on both sides inside the metal tank 1110 of the etching device 1000, with the side with the flared mouth facing the entrance; The inner liner tube to be processed is inserted into the metal groove 1110 from one side and exited from the other side. The front end of the inner liner tube is fixed to the traction machine at the end, and the middle part of the inner liner tube to be processed is allowed to fall freely into the groove of the guide block mold 1130. Two sets of pressure plate molds 1140 are placed in the grooves on both sides inside the etching tank, so that the inner liner tube to be processed is in the middle round hole of the guide block mold 1130 and the etching tube pressure block mold. Close the inlet / outlet flip-top assembly 1200 and the middle flip-top assembly 1300 respectively, engage and secure the latch ring 1700 with the retaining ring, and close the third ball valve 1172 of the third connector assembly 1170 in the etching device 1000; turn on the gas protection device 3000, and slowly adjust the gas pressure from zero to a suitable pressure level; at the same time, increase the flow valve on the flow meter 3004 to allow nitrogen to quickly fill the inner cavity of the metal tank 1110; when airflow is detected at the inlet / outlet of the metal tank 1110, the flow valve can be appropriately reduced to decrease the gas flow rate; Move the two sets of horn mask shells 4002 at the end of the gas purification device 4000 to the inlet and outlet positions of the etching device 1000, then turn on the gas purification device 4000 and adjust the appropriate gas extraction flow rate according to the scale value of the nitrogen flow meter 3004; turn on the power switch on the extraction circulation device 2000, start the liquid pump assembly 2100 and adjust the control unit 2101 so that the sodium naphthalene treatment liquid quickly fills the inside of the metal tank 1110, and then the treatment liquid submerges the inner liner tube to be processed in the middle circular hole of the etching tube pressure plate to a certain height. At this time, the etching liquid in the middle of the metal tank 1110 will flow from the gap between the guide block mold 1130 and the pressure plate mold 1140 and the inner liner tube to be processed to the smaller areas on both sides of the metal tank 1110, and then flow out through the fourth connector assembly 1180 of the etching device 1000 and return to the storage tank 2200 through the pipeline. The inner liner tube to be processed, located in the middle section of the metal tank 1110, will float above the processing liquid. At this time, loosen the limit screw 1404 in the height adjustment component 1400, adjust the height of the connecting rod 1402 and let the pressing block 1401 press the inner liner tube to be processed down to a certain position below the surface of the processing liquid, and then tighten the limit screw 1404; adjust the remaining height adjustment components 1400 to the appropriate height in sequence to ensure that the entire inner liner tube to be processed in the metal tank 1110 is below the surface of the processing liquid; start the traction machine to let the inner liner tube to be processed continuously enter from the left inlet of the metal tank 1110 and exit from the right outlet, and etch the inner liner tube to be processed through the processing liquid in the middle of the metal tank 1110; When it is necessary to replace the inner liner tube of other specifications for etching, turn off the liquid pump switch on the extraction circulation device 2000 to stop the delivery of the processing liquid; turn off the first ball valve 1154 of the first connector assembly 1150 located in the middle position in the etching tank assembly 1100; loosen the limit screw 1404 in the height adjustment assembly 1400, pull the connecting rod 1402 to the highest position, and then tighten the limit screw 1404; pull the steel wire rope 1126 on the left to move the etching slider 1123 to the left inlet position of the metal tank 1110; remove the horn mask shell 4002 of the gas purification device 4000 located at the left inlet, open the inlet and outlet flip cover assembly 1200 on the same side, and take out the pressure plate mold 1140 and the guide block mold 1130 in sequence through the long screw, and reposition the etching tube guide mold of the corresponding specification; Tie a knot at the front end of the inner liner tube to be processed and put it on the fixed hook 1125. Pull the steel wire rope 1126 on the right side by hand to move the inner liner tube to be processed along with the etching slider 1123 to any position in the area formed by the metal groove 1110 and the middle flip-top assembly 1300. Let the inner liner tube to be processed fall freely into the groove of the guide block mold 1130. Then, place the corresponding pressure plate mold 1140 in the groove on the left side of the etching groove with a long screw, so that the inner liner tube to be processed is in the middle round hole of the guide block mold 1130 and the etching tube pressure block mold. Close the left inlet and outlet flip-top assembly 1200 and move the horn mask shell 4002 of the gas purification device 4000 located at the left inlet back to its original position. Remove the horn mask housing 4002 of the gas purification device 4000 located at the right entrance, open the inlet / outlet flip-top assembly 1200 on the same side, and remove the pressure plate mold 1140 and guide block mold 1130 in sequence using the long screws. Replace the etching tube guide mold of the corresponding specification. Continue to pull the steel wire rope 1126 on the right to move the inner liner tube to be processed to the right position along with the etching slider 1123. Remove the inner liner tube to be processed from the fixed hook 1125 and pass it out from the right side of the etching device 1000. The front end of the inner liner tube to be processed is fixed to the traction machine at the end, allowing the inner liner tube to fall freely into the groove of the guide block mold 1130. Then, the corresponding pressure plate mold 1140 is placed in the groove on the right side of the etching tank using long screws, so that the inner liner tube to be processed is in the middle round hole of the guide block mold 1130 and the etching tube pressure block mold. The inlet and outlet flip cover assembly 1200 on the right side is closed, and the horn mask shell 4002 of the gas purification device 4000 located at the right inlet is moved back to its original position. Open the first ball valve 1154 of the first connector assembly 1150 located in the middle position in the etching tank assembly 1100, open the liquid pump switch on the extraction circulation device 2000 to start conveying the processing liquid; start the traction machine to allow the inner liner tube to be processed to continuously enter from the left inlet of the metal tank 1110 and exit from the right outlet, and etch the inner liner tube to be processed through the processing liquid in the middle of the metal tank 1110. At this point, loosen the limit screw 1404 in the height adjustment component 1400 and adjust the height of the connecting rod 1402 so that the pressing block 1401 presses the inner liner tube to be processed down to a certain position below the surface of the processing liquid. Then tighten the limit screw 1404. Adjust the remaining height adjustment components 1400 to the appropriate height in sequence. When fresh etching solution needs to be added during the etching process, open the injection port 2203 of the storage tank 2200 and inject the fresh treatment solution into the storage tank 2200 using a tool. After the injection is completed, seal the injection port 2203 with a sealing element to prevent air from entering the storage tank 2200. After etching is completed, disconnect the forward delivery switch of the liquid pump in the extraction and circulation device 2000, start the reverse delivery switch of the liquid pump, and transport the processing liquid stored in the first conduit 5101 and the second conduit 5102 back to the storage tank 2200. After the storage liquid is transported, close the reverse delivery switch of the liquid pump in the processing liquid circulation device, and close the second ball valve 1165 of the second connector assembly 1160 located on the right side in the etching tank assembly 1100. Open the ball valve in the third connector assembly 1170 of the etching device 1000, so that the processing liquid stored in the middle position of the metal tank 1110 can quickly flow back into the storage tank 2200. The processing liquid stored on both sides of the metal tank 1110 will flow back into the storage tank 2200 under the continuous pressure of nitrogen, thereby completing the cleaning of the processing liquid in the pipeline. After all the processing liquid has flowed back, turn off the gas protection device 3000 and close the first ball valve 1154 on the first connector assembly 1150 located in the middle position of the metal tank 1110. Subsequently, the pipeline is cleaned. First, the first conduit 5101 and the third conduit 5103 connected to the storage tank 2200 are disconnected. Then, the outlet 2201 is placed in the cleaning solution, and the return port 2202 is placed in the waste liquid collector. The second ball valve 1165 of the second connector assembly 1160 located on the right side of the etching tank assembly 1100 is opened, and the forward delivery switch of the liquid pump in the processing liquid circulation device is started. In conjunction with the first ball valve 1154 of the first connector assembly 1150 located in the middle of the etching tank assembly 1100, the cleaning solution is used to clean the metal tank 1110 and multiple circuits in the order of first the middle and then the two sides. The waste liquid after cleaning is discharged into the collector.

[0052] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A continuous etching production equipment for pipes, characterized in that, include: The etching tank assembly has a middle flip-top assembly and an inlet / outlet flip-top assembly installed on top via a sealing strip, which is used for the sealed transport of the pipe to be processed for continuous etching. A liquid pump assembly is connected to a liquid storage tank via a connecting conduit and a connecting connector. The liquid storage tank is mounted on a fixed assembly and is used for the sealed delivery of the solution to be sprayed for surface treatment. The etching tank assembly is provided with a metal tank, the middle flip-top assembly is located above the middle of the metal tank, and the inlet / outlet flip-top assembly is located above the end of the metal tank, so that the metal tank is divided into a main etching chamber and multiple reflux chambers. The metal groove is equipped with an etching motion component. Guide block molds and pressure plate molds are respectively provided at both ends of the etching motion component. The etching motion component is used to traction and drive the pipe to be processed through the guide block molds and pressure plate molds in the reflux cavity. Multiple height adjustment components are symmetrically inserted at the top of the middle flip-top assembly, and the height adjustment components are used to adjust the height of the pipe.

2. The continuous etching production equipment for pipes according to claim 1, characterized in that, The etching motion assembly includes symmetrically arranged guide shafts that pass through the slider bushing of the etching slider. A fixing ring passes through the end of the guide shaft. A steel wire rope passes through the middle of the etching slider. A rope clamp passes through the steel wire rope. The end of the steel wire rope is wound around a rotating pulley and a rotating drum. The rotating pulley and the rotating drum are detachably connected to the side of the metal groove by fasteners. A fixing hook is screwed to one side of the etching slider.

3. The continuous etching production equipment for pipes according to claim 2, characterized in that, A connecting hinge is symmetrically arranged on one side of the metal trough, and a snap ring is symmetrically arranged on the other side of the metal trough. The connecting hinge is detachably connected to the metal trough, the middle flip-top assembly, and the inlet / outlet flip-top assembly. An overflow port, an air inlet, and a liquid inlet are opened on one side of the middle of the metal trough. A liquid outlet is respectively provided at the middle and end of the bottom of the metal trough. A first connector assembly is inserted into the overflow port and the air inlet. A second connector assembly is inserted into the liquid inlet. A third connector assembly is inserted into the liquid outlet at the middle. A fourth connector assembly is inserted into the liquid outlet at the end.

4. The continuous etching production equipment for pipes according to claim 3, characterized in that, The first connector assembly includes multiple sets of first inlet connectors disposed inside the metal groove. The first inlet connectors are screwed to a first internal thread connector via a first gasket. The first internal thread connectors are screwed to a first threaded quick connector via a first ball valve. The second connector assembly includes a second inlet connector disposed inside the metal tank. The second inlet connector is screwed to a second internal thread connector via an inlet baffle. The second internal thread connector is screwed to a second threaded quick connector via a second ball valve.

5. The continuous etching production equipment for pipes according to claim 3, characterized in that, The third connector assembly includes a third internal thread connector disposed on the outside of the metal groove, the third internal thread connector being screwed to a third threaded quick connector via a third ball valve; The fourth connector assembly includes a fourth internal thread connector disposed on the outside of the metal groove, which is screwed to a fourth threaded quick connector.

6. The continuous etching production equipment for pipes according to claim 1, characterized in that, The middle flip cover assembly and the inlet / outlet flip cover assembly are fitted with a sealing strip. The sealing strip is disposed on sheet metal sheets near the middle on both sides of the metal groove. The middle flip cover assembly includes a middle opening flip cover, and a second buckle ring is provided on one side of the middle opening flip cover. The inlet / outlet flip cover assembly includes an inlet / outlet flip cover, and a first buckle ring is provided on one side of the inlet / outlet flip cover.

7. The continuous etching production equipment for pipes according to claim 1, characterized in that, The height adjustment assembly includes a connecting rod, the bottom of which passes through the central opening and is inserted into the pressing block, and a limiting block is installed on the top of the connecting rod by a limiting screw, with an adjustment handle installed above the limiting block.

8. The continuous etching production equipment for pipes according to claim 1, characterized in that, The top of the liquid pump assembly is equipped with a control unit. The side of the liquid pump assembly is symmetrically equipped with a liquid pump inlet and a liquid pump outlet. The top of the liquid storage tank is respectively equipped with a liquid outlet, a reflux port, and a liquid injection port. The liquid pump inlet and the liquid outlet are connected through a first conduit. The liquid pump outlet and the second threaded quick connector are connected through a second conduit. The reflux port, the liquid outlet, and the overflow port are connected through a fifth conduit. The fifth conduit is connected to a third conduit through a first connector. The third conduit is connected to a sixth conduit and a first connector through a second connector.

9. The continuous etching production equipment for pipes according to claim 1, characterized in that, The fixing component includes a supporting base plate, a limiting side plate is provided on the supporting base plate, a liquid storage tank is provided inside the limiting side plate, and a height upright is provided through the edge of the supporting base plate. The height upright is detachably connected to the supporting base plate by an adjusting nut.

10. The continuous etching production equipment for pipes according to claim 1, characterized in that, It also includes an air source, which is connected to the air inlet via a flow meter. The air source is equipped with a regulating valve and a pressure gauge. It also includes a purification unit, which is equipped with a horn-shaped mask shell at its end.

Images