Curtain-type constant pressure coating pipe and anti-corrosion steel pipe production equipment

Abstract

This utility model relates to the technical field of steel pipe production equipment, specifically to a curtain-type constant pressure coating pipe and anti-corrosion steel pipe production equipment. The curtain-type constant pressure coating pipe, used in anti-corrosion steel pipe production equipment, includes a core pipe, an outer pipe, and a water spraying section. The core pipe has a water outlet and is connected to an inlet pipe. The core pipe is located inside the outer pipe, and a water outlet gap is formed between the outer wall of the core pipe and the inner wall of the outer pipe. The water spraying section is connected to the outer pipe. The water spraying section has a water spraying channel that communicates with the water outlet gap and extends axially along the outer pipe. This curtain-type constant pressure coating pipe reduces coolant splashing during water discharge, effectively removing more heat and improving cooling effect and efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of steel pipe production equipment, and more specifically, to a curtain-type constant pressure coating pipe and anti-corrosion steel pipe production equipment. Background Technology

[0002] During the production of 3PE anti-corrosion steel pipes, a roller conveyor mechanism is required for transportation. The production process of 3PE anti-corrosion steel pipes includes: placing the steel pipes with shot blasting treatment on the inner and outer surfaces onto the roller conveyor mechanism, and moving them to the medium frequency heating station for heating under the conveyor mechanism; using the roller conveyor mechanism to transport the heated steel pipes to the anti-corrosion station, where epoxy spraying and wrapping adhesive, as well as polyethylene melt adhesive are applied to the steel pipes.

[0003] When polyethylene molten adhesive adheres to the surface of a steel pipe, the temperature is still very high (around 180°C). Therefore, the polyethylene skin is soft, cannot withstand gravity, and is easily damaged. In related technologies, in order to improve the problem of easy damage to the polyethylene anti-corrosion surface, the steel pipe is sprayed with cooling liquid downstream of the anti-corrosion station to cool it down, so that the anti-corrosion coating can quickly form a hard crystalline layer.

[0004] However, the coolant spraying devices provided by related technologies are prone to coolant splashing, resulting in less heat removal, poor cooling effect, and low cooling efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a curtain-type constant pressure coating pipe and an anti-corrosion steel pipe production equipment. The curtain-type constant pressure coating pipe can be used in the anti-corrosion steel pipe production equipment to cool the steel pipe coated with the anti-corrosion layer. Moreover, when the curtain-type constant pressure coating pipe is discharging water, it is not easy for coolant to splash, which can efficiently remove more heat and improve the cooling effect and efficiency.

[0006] The embodiments of this utility model can be implemented as follows: In a first aspect, this utility model provides a curtain-type constant pressure coating pipe, comprising: The core tube is equipped with an outlet and is connected to an inlet pipe; An outer tube, a core tube is installed inside the outer tube, and a water outlet gap is formed between the outer wall of the core tube and the inner wall of the outer tube; and, The water spray section is connected to the outer pipe; the water spray section is provided with a water spray channel, which is connected to the water outlet gap and extends along the axial direction of the outer pipe.

[0007] In an optional embodiment, the water spraying section includes two water guide plates, both of which are connected to the outer pipe, and the two water guide plates are spaced apart to form a water spraying channel.

[0008] In an optional embodiment, the water spray section further includes an adjustment component connected to two water guide plates for adjusting the width of the water spray channel.

[0009] In an optional embodiment, both ends of the outer tube and the core tube are closed ends in the axial direction, and at least one end of the outer tube in the axial direction is provided with an air hole.

[0010] In an optional embodiment, the outer tube has a side close to the water spray section and a side away from the water spray section, and the air hole is adjacent to the side of the outer tube away from the water spray section.

[0011] In an optional embodiment, air holes are provided at both ends of the outer tube along its axial direction.

[0012] In an optional embodiment, the core tube has a side facing the water spray section and a side away from the water spray section; the water outlet is distributed on the side of the core tube away from the water spray section; and / or, the water inlet pipe is connected to the side of the core tube away from the water spray section.

[0013] In an optional embodiment, the core tube is provided with multiple water outlets, which are distributed sequentially at intervals along the axial direction of the core tube.

[0014] In an optional embodiment, one end of the inlet pipe is connected to the core pipe, and the other end of the inlet pipe extends out of the outer pipe; and / or, The inlet pipe is connected to the middle of the core tube along its axis.

[0015] In an optional embodiment, the curtain-type constant pressure coating pipe also includes a lifting mechanism, which is connected to the outer pipe drive mechanism to drive the outer pipe to move the core pipe, water inlet pipe and water spray section up and down synchronously.

[0016] Secondly, this utility model provides a corrosion-resistant steel pipe production equipment, including the curtain-type constant pressure coating pipe of any of the aforementioned embodiments.

[0017] The beneficial effects of the curtain-type constant pressure coating pipe of this utility model embodiment include: When the curtain-type constant pressure coating pipe provided by this utility model embodiment is used, the coolant can be introduced into the core tube through the water inlet pipe, and then the coolant can flow out from the water outlet set in the core tube to the water outlet gap between the core tube and the outer tube. Finally, it enters the water spraying channel of the water spraying part through the water outlet gap, so as to form a curtain (or water curtain) type water outlet through the water spraying channel. This curtain-type water outlet method has a large water flow rate and will not cause an additional increase in water pressure, so that the water pressure is more constant and uniform. Therefore, it is not easy for the coolant to splash after falling on the steel pipe. Moreover, the curtain-type water outlet is conducive to the coolant covering a larger area of ​​the steel pipe surface, which can efficiently remove more heat and improve the cooling effect and efficiency.

[0018] The anti-corrosion steel pipe production equipment of this utility model embodiment includes all the beneficial effects of the aforementioned curtain-type constant pressure coating pipe, such as: it can efficiently remove more heat, improving the cooling effect and efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a structural schematic diagram of anti-corrosion steel pipe production equipment in related technologies; Figure 2 This is a schematic diagram of the anti-corrosion steel pipe production equipment in an embodiment of this utility model; Figure 3 This is a schematic diagram of the curtain-type constant pressure coating pipe in the embodiment of this utility model from a first perspective. Figure 4 This is a schematic diagram of the curtain-type constant pressure coating pipe in the embodiment of this utility model from a second perspective. Figure 5 This is a partial structural schematic diagram of the anti-corrosion steel pipe production equipment in an embodiment of this utility model.

[0021] Icons: 010-Anti-corrosion steel pipe production equipment; 110-Roller conveyor mechanism; 120-Medium frequency heating station; 130-Anti-corrosion station; 140-Coolant spray pipe; 150-Spray nozzle; 200-Curtain type constant pressure coating pipe; 210-Core pipe; 211-Outlet; 212-Inlet pipe; 220-Outer pipe; 221-Outlet gap; 222-Air hole; 230-Water spray section; 231-Water spray channel; 232-Water guide plate; 240-Adjusting component; 250-Lifting mechanism; 300-Steel pipe. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0027] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0028] Please refer to Figure 1 The coolant spraying device for the anti-corrosion steel pipe production equipment 010 provided by the related technology typically includes a coolant spraying pipe 140 and multiple spray nozzles 150 disposed on the coolant spraying pipe 140. The multiple spray nozzles 150 are arranged sequentially along the axial direction of the coolant spraying pipe 140 so as to spray the coolant inside the coolant spraying pipe 140 using the multiple spray nozzles 150 to cool the steel pipe 300 covered with the anti-corrosion surface layer.

[0029] However, the inventors discovered that the limited water output of the spray nozzle 150 easily leads to high outlet pressure. When the inlet pressure of the coolant spray pipe 140 is high, the outlet pressure of the spray nozzle 150 will be even higher. The coolant sprayed from the spray nozzle 150 is prone to splashing, resulting in less heat removal. Furthermore, splashing coolant can reduce the service life of other components in the anti-corrosion steel pipe production equipment 010, such as the motor of the roller conveyor mechanism 110. Moreover, the widespread splashing of coolant can negatively impact the production environment and increase coolant consumption.

[0030] Meanwhile, the coolant sprayed from the spray nozzles 150 is difficult to effectively cover the surface of the steel pipe 300, meaning the area covered by the coolant on the steel pipe 300 is small, which further reduces the cooling effect. In particular, in embodiments where multiple spray nozzles 150 are spaced apart, the coverage area of ​​the coolant sprayed from the spray nozzles 150 on the steel pipe 300 is even smaller, making it even more difficult to ensure effective cooling.

[0031] To address the aforementioned issues, this embodiment provides a corrosion-resistant steel pipe production equipment, which includes a curtain-type constant pressure coating pipe for cooling the steel pipe.

[0032] Please refer to Figure 2 The structure of the anti-corrosion steel pipe production equipment 010 in this embodiment is similar to that of related technologies. It includes a roller conveyor mechanism 110, a medium-frequency heating station 120, and an anti-corrosion station 130. The roller conveyor mechanism 110 is used to convey the steel pipe 300 so that the steel pipe 300 is moved sequentially to the medium-frequency heating station 120 for heating and to the anti-corrosion station 130 for coating with an anti-corrosion layer. That is, the anti-corrosion station 130 is located downstream of the medium-frequency heating station 120. The structure and working principle of the roller conveyor mechanism 110, the medium-frequency heating station 120, and the anti-corrosion station 130 are similar to those of related technologies and will not be described in detail here.

[0033] The curtain-type constant pressure coating pipe 200 of the anti-corrosion steel pipe production equipment 010 is located downstream of the anti-corrosion station 130, so that the steel pipe 300 covered with the anti-corrosion layer can be transported to the position of the curtain-type constant pressure coating pipe 200 for cooling by using the roller conveyor mechanism 110.

[0034] Please refer to Figure 3 , Figure 4 and Figure 5 The curtain-type constant pressure coating pipe 200 of this embodiment includes: a core pipe 210, an outer pipe 220, and a water spraying section 230. The core pipe 210 is provided with a water outlet 211 and is connected to a water inlet pipe 212. The core pipe 210 is disposed inside the outer pipe 220, and a water outlet gap 221 is formed between the outer wall of the core pipe 210 and the inner wall of the outer pipe 220. The water spraying section 230 is connected to the outer pipe 220. The water spraying section 230 is provided with a water spraying channel 231, which communicates with the water outlet gap 221 and extends along the axial direction of the outer pipe 220.

[0035] When in use, the curtain-type constant pressure coating pipe 200 allows coolant to be introduced into the core tube 210 through the inlet pipe 212, and then the coolant flows out from the outlet 211 of the core tube 210 to the water outlet gap 221 between the core tube 210 and the outer pipe 220. Finally, it enters the water spray channel 231 of the water spray section 230 through the water outlet gap 221, forming a curtain (or water curtain) type water outlet. This curtain-type water outlet method has a large water flow rate and does not cause an additional increase in water pressure, making the water pressure more constant and uniform. This reduces the likelihood of coolant splashing after falling onto the steel pipe 300. Furthermore, the curtain-type water outlet allows the coolant to cover a larger area of ​​the steel pipe 300 surface (the coolant can flow across the surface of the steel pipe 300 from both sides of the axial direction), which can efficiently remove more heat and improve the cooling effect and efficiency.

[0036] Optionally, the water spray section 230 includes two water guide plates 232, both of which are connected to the outer pipe 220, and the two water guide plates 232 are spaced apart to form a water spray channel 231. This arrangement allows the two water guide plates 232 to guide the coolant out of the water spray channel 231 evenly and at a constant pressure, effectively improving the problem of coolant splashing easily after contacting the steel pipe 300, ensuring that the coolant can carry away more heat and improve the cooling effect.

[0037] The connection methods between the water guide plate 232 and the outer pipe 220 include, but are not limited to, welding, integral molding, plug-in, and connection with fasteners such as bolts.

[0038] Optionally, the water spraying section 230 also includes an adjustment component 240, which is connected to two water guide plates 232 and is used to adjust the width of the water spraying channel 231. By adjusting the distance between the two water guide plates 232 through the adjustment component 240, the width of the water spraying channel 231 can be adjusted, thereby adjusting the water output.

[0039] The structure of the adjusting component 240 can be selected as needed; for example, the adjusting component 240 includes a bolt and a nut, both water guide plates 232 are provided with adjusting holes, the bolt passes through the adjusting holes of the two water guide plates 232 in sequence, and the head of the bolt abuts against the side of one water guide plate 232 away from the other water guide plate 232, the nut is threadedly connected to the threaded rod of the bolt, and is distributed on the side of the other water guide plate 232 away from the first water guide plate 232, by rotating the nut so that the nut moves along the axial direction of the bolt, the distance between the two water guide plates 232 can be adjusted (i.e., the width of the water spray channel 231 is adjusted).

[0040] Optionally, both ends of the outer tube 220 and the core tube 210 are closed ends in the axial direction, and at least one end of the outer tube 220 in the axial direction is provided with an air hole 222. The air hole 222 can be used to maintain the pressure balance in the water outlet gap 221, ensuring that the water entering the water outlet gap 221 can smoothly enter the water spray channel 231 and be output to the cooling steel pipe 300 through the water spray channel 231.

[0041] Optionally, the outer tube 220 has a side close to the water spray section 230 and a side away from the water spray section 230, and the vent 222 is adjacent to the side of the outer tube 220 away from the water spray section 230. This arrangement helps to improve the problem of coolant entering the water outlet gap 221 overflowing from the vent 222.

[0042] Optionally, air holes 222 are provided at both ends of the outer tube 220 along the axial direction. This makes it easier to maintain the pressure balance in the water outlet gap 221.

[0043] Of course, in other embodiments, the vent 222 may be provided only at one end of the outer tube 220 in the axial direction.

[0044] It should be noted that since both ends of the outer tube 220 are closed ends in the axial direction, that is, both ends of the outer tube 220 have cover plates, when assembling the curtain-type constant pressure coating pipe 200, the core tube 210 can be assembled into the body of the outer tube 220 first, and then the cover plate can be connected to the body of the outer tube 220 to seal its end.

[0045] Optionally, the core tube 210 has a side facing the water spray section 230 and a side away from the water spray section 230; the outlet 211 is distributed on the side of the core tube 210 away from the water spray section 230. In this way, after sufficient coolant is filled into the core tube 210 through the inlet pipe 212, the coolant can overflow from the outlet 211 and flow along the outer wall of the core tube 210 in the outlet gap 221. This not only guides the flow of coolant but also allows the coolant to flow into the water spray channel 231 in an unpressurized state and be output from the water spray channel 231 at a constant pressure. This effectively improves the situation where the coolant is output by spraying and is prone to splashing.

[0046] Of course, in other embodiments, the water outlet 211 can also be located on the side of the core tube 210, that is, the water outlet 211 can be located between the side of the core tube 210 close to the water spray section 230 and the side away from the water spray section 230.

[0047] Optionally, the core tube 210 is provided with multiple water outlets 211, which are distributed sequentially at intervals along the axial direction of the core tube 210. This arrangement ensures that the coolant flows out uniformly from the multiple water outlets 211 and is ultimately output uniformly from the water spray channel 231, thus ensuring the uniformity of cooling; moreover, it also ensures a sufficient amount of coolant output to ensure cooling efficiency.

[0048] Optionally, the multiple outlets 211 can be distributed at equal intervals or at unequal intervals.

[0049] In the embodiment where multiple outlets 211 are evenly distributed, the output of coolant is more uniform, which helps to ensure the uniformity of cooling of the steel pipe 300.

[0050] Optionally, the core tube 210 is a round tube; in this way, when the coolant overflows from the outlet 211, it can be ensured that the coolant flows more smoothly toward the water spray channel 231.

[0051] Of course, in other embodiments, the core tube 210 can be a square tube or the like, and no specific limitation is made here.

[0052] Optionally, the inlet pipe 212 is connected to the side of the core tube 210 away from the water spray section 230. This arrangement ensures that the coolant fills the core tube 210 before being output from the outlet 211, thus ensuring a constant pressure when the coolant is output from the water spray channel 231. This effectively improves the situation where the coolant is output by spraying and is prone to splashing.

[0053] Of course, in other embodiments, the water inlet pipe 212 may also be connected to the axial end of the core tube 210, or to the side of the core tube 210 facing the water spray section 230.

[0054] Optionally, one end of the inlet pipe 212 is connected to the core pipe 210, and the other end of the inlet pipe 212 extends out of the outer pipe 220. The end of the inlet pipe 212 extending out of the outer pipe 220 is convenient to connect to the coolant pump so as to supply coolant using the coolant pump.

[0055] Optionally, the inlet pipe 212 is connected to the middle of the core tube 210 in the axial direction. This arrangement ensures that the water output at both ends of the core tube 210 in the axial direction is equal.

[0056] Of course, in other embodiments, the water inlet pipe 212 may also be connected to the core pipe 210 near one of its ends.

[0057] Optionally, the inlet pipe 212 is connected to the outer pipe 220; in this way, the core pipe 210 and the outer pipe 220 can be connected by the inlet pipe 212.

[0058] The connection between the inlet pipe 212 and the outer pipe 220 can be made by means including but not limited to welding or using fasteners such as bolts.

[0059] Of course, in some embodiments, in order to further improve the stability of the core tube 210 disposed on the outer tube 220 and ensure that the water outlet gap 221 maintains a stable width, the axial end of the core tube 210 is connected to the axial end of the outer tube 220.

[0060] Optionally, the two ends of the core tube 210 in the axial direction are connected one-to-one with the two ends of the outer tube 220 in the axial direction; or, one end of the core tube 210 in the axial direction is connected to one end of the outer tube 220 in the axial direction.

[0061] The connection methods between the end of the core tube 210 and the end of the outer tube 220 include, but are not limited to, welding and connection with fasteners such as bolts. Optionally, the outer tube 220 is a square tube. The circumferential outer wall of the core tube 210 is distributed at intervals with the circumferential inner wall of the outer tube 220, forming water outlet gaps 221.

[0062] Of course, in other embodiments, the outer tube 220 can also be a round tube.

[0063] Optionally, the axis of the core tube 210 coincides with the axis of the outer tube 220.

[0064] Of course, in other embodiments, the axis of the core tube 210 may also be parallel to the axis of the outer tube 220.

[0065] Alternatively, please refer to Figure 2 The curtain-type constant pressure coating pipe 200 also includes a lifting mechanism 250, which is connected to the outer pipe 220 for driving the outer pipe 220 to synchronously raise and lower the core pipe 210, the water inlet pipe 212, and the water spray section 230. In this way, the height of the water spray section 230 from the steel pipe 300 can be adjusted to ensure the cooling efficiency and effect of the steel pipe 300.

[0066] The lifting mechanism 250 can be selected according to needs, such as electric push rod, hydraulic cylinder, gear and rack mechanism, etc.

[0067] In this embodiment, when the anti-corrosion steel pipe production equipment 010 uses the curtain-type constant pressure coating pipe 200 to cool down the steel pipe 300 covered with the anti-corrosion layer, the coolant can enter the core pipe 210 from the inlet pipe 212, overflow from the outlet 211, and enter the water spraying channel 231 through the water outlet gap 221, so that the coolant can be output through the water spraying channel 231 to spray onto the outer surface of the steel pipe 300 and cool down the steel pipe 300.

[0068] In summary, the curtain-type constant pressure coating pipe 200 of this utility model can be used in the anti-corrosion steel pipe production equipment 010 to cool the steel pipe 300 covered with the anti-corrosion layer by the anti-corrosion steel pipe production equipment 010. Moreover, when the water is discharged, the curtain-type constant pressure coating pipe 200 is less likely to splash coolant, and can efficiently remove more heat, thus improving the cooling effect and efficiency.

[0069] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A curtain-type constant pressure coating pipe, characterized in that, include: The core tube (210) is provided with an outlet (211) and is connected to an inlet pipe (212). An outer tube (220) is provided, the core tube (210) is disposed inside the outer tube (220), and a water outlet gap (221) is formed between the outer wall of the core tube (210) and the inner wall of the outer tube (220); and, A water spray section (230) is connected to the outer pipe (220); wherein the water spray section (230) is provided with a water spray channel (231), the water spray channel (231) is connected to the water outlet gap (221), and the water spray channel (231) extends along the axial direction of the outer pipe (220).

2. The curtain-type constant pressure coating pipe according to claim 1, characterized in that, The water spray section (230) includes two water guide plates (232), both of which are connected to the outer pipe (220), and the two water guide plates (232) are spaced apart to form the water spray channel (231).

3. The curtain-type constant pressure coating pipe according to claim 2, characterized in that, The water spray section (230) also includes an adjustment component (240), which is connected to the two water guide plates (232) and is used to adjust the width of the water spray channel (231).

4. The curtain-type constant pressure coating pipe according to claim 1, characterized in that, Both ends of the outer tube (220) and the core tube (210) are closed ends in the axial direction, and at least one end of the outer tube (220) in the axial direction is provided with an air hole (222).

5. The curtain-type constant pressure coating pipe according to claim 4, characterized in that, The outer tube (220) has a side close to the water spray section (230) and a side away from the water spray section (230), and the air hole (222) is adjacent to the side of the outer tube (220) away from the water spray section (230).

6. The curtain-type constant pressure coating pipe according to claim 4, characterized in that, Both ends of the outer tube (220) are provided with air holes (222) along the axial direction.

7. The curtain-type constant pressure coating pipe according to claim 1, characterized in that, The core tube (210) has a side facing the water spray section (230) and a side away from the water spray section (230); the water outlet (211) is distributed on the side of the core tube (210) away from the water spray section (230); and / or, the water inlet pipe (212) is connected to the side of the core tube (210) away from the water spray section (230).

8. The curtain-type constant pressure coating pipe according to claim 7, characterized in that, The core tube (210) is provided with a plurality of water outlets (211), which are distributed sequentially at intervals along the axial direction of the core tube (210); and / or, One end of the inlet pipe (212) is connected to the core pipe (210), and the other end of the inlet pipe (212) extends out of the outer pipe (220); and / or, The water inlet pipe (212) is connected to the middle part of the core tube (210) in the axial direction.

9. The curtain-type constant pressure coating pipe according to any one of claims 1-8, characterized in that, The curtain-type constant pressure coating pipe also includes a lifting mechanism (250), which is connected to the outer pipe (220) for driving the outer pipe (220) to drive the core pipe (210), the water inlet pipe (212) and the water spraying part (230) to rise and fall synchronously.

10. A corrosion-resistant steel pipe production equipment, characterized in that, Includes the curtain-type constant pressure coating pipe as described in any one of claims 1-9.

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