Corrosion-resistant coating spraying equipment for tubular cooler

Abstract

The invention discloses corrosion-resistant coating spraying equipment for a tubular cooler, and relates to the technical field of spraying equipment, the corrosion-resistant coating spraying equipment comprises a flow guide pipe, a coating conveying connector, a filter element, a supporting unit, a spray head, a nozzle and a flow guide part, and the flow guide part comprises a first annular plate, a flow guide plate and a first vortex part; the guide part comprises a second annular plate, a guide plate and a second vortex part, during use, coating is impacted by the guide plate when being sprayed out from the nozzle, so that the coating can be dispersed, the coating is further atomized, and after being impacted by the guide plate, the coating is splashed into the wall surface of the guide plate and then flows along the surface of the first vortex part, so that the coating is mixed; and meanwhile, the coating impacts the inner wall of the tube shell, so that the coating is attached to the inner wall of the tube shell to form a corrosion-resistant coating, and when large particles in the coating rebound on the inner wall of the tube shell, the large particles are rebounded into the concave part of the second vortex part, so that the large particles are prevented from splashing to the surface of the formed coating.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spraying equipment, in particular to a kind of anticorrosive coating spraying equipment for tube-in-tube cooler. BACKGROUND

[0002] Tube-in-tube cooler, also known as shell-and-tube cooler, is divided into tube and shell, the liquid flowing in the tube is the tube, and the liquid flowing outside the tube is the shell. The wall of the tube bundle is the heat transfer surface. When the temperature difference between the tube bundle and the shell exceeds 50℃, appropriate temperature compensation measures should be taken to eliminate or reduce thermal stress. Generally, it is water-cooled, which dominates. Tube-in-tube cooler is composed of two cold oilers with the same area and a three-way valve device. One is working, and the other is standby. Each cooler can bear the cooling load of the entire system. The tube plate is fixed at one end and floating at the other end. The detachable tube bundle and water chamber box cover are convenient for cleaning, inspection and maintenance during operation. The material of the cooler can be selected according to the use location and water system conditions.

[0003] Tube-in-tube cooler is widely used in petroleum, chemical industry, power, metallurgy and other industries. Its working medium usually includes cooling water (may contain chloride ions, dissolved oxygen and microorganisms), acidic or alkaline fluid, salt-containing and sulfur-containing process medium, and high-temperature and high-pressure steam. These media can cause corrosion to the inner wall of the tube and shell during long-term operation. Therefore, after production, the tube and shell of the tube-in-tube cooler need to be sprayed with anticorrosive coating on the inner wall. The existing spraying equipment mainly sprays the coating towards the inner wall of the tube and shell at high speed through the nozzle. Since the coating relies on the inertia after being sprayed from the nozzle to impact the inner wall of the tube and shell, and then adhere to the inner wall of the tube and shell, the coating cannot be uniformly adhered to the inner wall of the tube and shell in the circumferential direction when the nozzle sprays the coating. This may cause uneven coating thickness on the inner wall of the tube and shell. In addition, large particles in some coatings may rebound and embed into the coating layer at the sprayed position on the inner wall of the tube and shell when they are sprayed towards the inner wall of the tube and shell with the coating, affecting the spraying effect of the coating. SUMMARY

[0004] In view of the problems existing in the prior art, the present application is proposed. Therefore, the purpose of the present application is to provide an anticorrosive coating spraying equipment for tube-in-tube cooler, which solves the problem that the existing spraying equipment mainly sprays the coating towards the inner wall of the tube and shell at high speed through the nozzle. Since the coating relies on the inertia after being sprayed from the nozzle to impact the inner wall of the tube and shell, and then adhere to the inner wall of the tube and shell, the coating cannot be uniformly adhered to the inner wall of the tube and shell in the circumferential direction when the nozzle sprays the coating. This may cause uneven coating thickness on the inner wall of the tube and shell. In addition, large particles in some coatings may rebound and embed into the coating layer at the sprayed position on the inner wall of the tube and shell when they are sprayed towards the inner wall of the tube and shell with the coating, affecting the spraying effect of the coating.

[0005] In order to achieve the above object, the present application provides the following technical scheme: a kind of anticorrosion coating spraying equipment for tube cooler, comprising: Flow guide pipe, one end has coating conveying connecting port, the other end is equipped with filter core, the flow guide pipe is equipped with support unit, the outlet of the filter core is equipped with spray head, the periphery of the spray head is equipped with multiple spray nozzles; Flow guide part, including first ring plate, flow guide plate and first vortex part, the first ring plate is fixedly sleeved on the periphery of spray head, the flow guide plate is coaxially fixedly connected to the outer edge of first ring plate, the outer diameter of flow guide plate gradually increases in the direction away from first ring plate, and the first vortex part is coaxially fixedly connected to the outer diameter maximum end of flow guide plate. Guide part, including second ring plate, guide plate and second vortex part, the second ring plate is sleeved on the periphery of spray head, the spray nozzle is arranged between first ring plate and second ring plate, the guide plate is coaxially fixedly connected to the outer edge of second ring plate, the outer diameter of guide plate gradually increases in the direction adjacent to flow guide plate, and the nozzle part of spray nozzle corresponds to guide plate, the second vortex part is coaxially fixedly connected to the outer diameter maximum end of guide plate, and a vortex cavity is formed between the first vortex part and the second vortex part.

[0006] As a preferred scheme of the anticorrosion coating spraying equipment for tube cooler, wherein: the support unit includes a first hinge seat fixedly sleeved on the periphery of filter core, the periphery of flow guide pipe is slidably sleeved with a second hinge seat, the first hinge seat and the second hinge seat are each hingedly connected with a support arm, the support arm is rotatably connected with a roller away from one end of flow guide pipe, and the support arms on the first hinge seat and the second hinge seat correspondingly present a hinged state.

[0007] As a preferred scheme of the anticorrosion coating spraying equipment for tube cooler, wherein: the periphery of flow guide pipe is threadedly sleeved with an adjusting part, and the second hinge seat is coaxially rotatably connected to the adjusting part.

[0008] As a preferred scheme of the anticorrosion coating spraying equipment for tube cooler, wherein: the first vortex part is coaxially fixedly connected with a guide cover away from one end of flow guide plate, the outer diameter of guide cover gradually increases in the direction of second vortex part, and the longitudinal section of guide cover is tangentially connected with the longitudinal section of first vortex part.

[0009] As a preferred scheme of the anticorrosion coating spraying equipment for tube cooler, wherein: the second ring plate is slidably sleeved on the periphery of spray head, the spray head is provided with a damping unit, and the damping unit gives the potential energy of the second ring plate moving in the direction of first ring plate.

[0010] As a preferred scheme of the column cooler corrosion-resistant coating spraying device, the damping unit comprises a connecting portion coaxially fixed to the end of the nozzle, the second ring plate is coaxially fixed with a sliding cylinder, the sliding cylinder is slidingly sleeved on the connecting portion, the connecting portion is fixedly sleeved with a stop ring at the end away from the second ring plate, and an elastic member is arranged between the stop ring and the sliding cylinder.

[0011] As a preferred scheme of the column cooler corrosion-resistant coating spraying device, the elastic member is a spring sleeved on the periphery of the connecting portion, and the spring is elastically abutted against the stop ring and the sliding cylinder at the two ends of the elastic force direction.

[0012] As a preferred scheme of the column cooler corrosion-resistant coating spraying device, the second vortex portion is fixedly connected with an annular air bag at the end away from the flow guide pipe, the sliding cylinder is provided with an expansion unit, and the expansion unit is used for inflating the annular air bag to make the annular air bag expand in volume when the first ring plate and the second ring plate are relatively close.

[0013] As a preferred scheme of the column cooler corrosion-resistant coating spraying device, the expansion unit comprises a hollow cylinder coaxially fixed to the end face of the stop ring, the sliding cylinder is coaxially fixedly sleeved with a piston portion at the end away from the nozzle, the piston portion is coaxially slidingly clamped in the hollow cylinder, an end cover is fixedly clamped and installed at the end away from the stop ring of the hollow cylinder, the end cover is slidingly sleeved on the sliding cylinder, a communication cavity is formed between the end cover and the piston portion, and the communication cavity is in communication with the annular air bag through the air pipe.

[0014] As a preferred scheme of the column cooler corrosion-resistant coating spraying device, the wall surface of the connecting portion is provided with a dispersing notch.

[0015] 1、The present application, by setting the flow guide portion and the guide plate, when the coating is sprayed from the nozzle, the coating can be dispersed and further atomized by the impact of the guide plate, after the coating is impacted by the guide plate, it will splash into the wall surface of the flow guide plate, then flow along the surface of the first vortex portion, and then mix in the recessed part of the first vortex portion, at the same time, the coating will impact the inner wall of the pipe shell, so that the coating adheres to the inner wall of the pipe shell to form a corrosion-resistant coating, and when the large particles in the coating rebound on the inner wall of the pipe shell, they will be rebounded into the recessed part of the second vortex portion, thereby preventing the large particles from splashing onto the surface of the formed coating, in addition, after the coating enters the vortex cavity, mixing effect can be generated in the recessed part of the first vortex portion, so that the coating mixing effect is good, at the same time, the coating can be uniformly distributed in the vortex cavity, thereby enabling the coating to uniformly spray the inner wall of the pipe shell.

[0016] 2. In this invention, by setting a guide cover, the coating material in the first vortex section impacts the inner wall of the tube shell along the surface of the guide cover. In addition, the edge of the outermost end of the guide cover is close to the inner wall of the tube shell, making it less likely for the coating material to escape. Furthermore, since the longitudinal section of the guide cover is tangent to the periphery of the longitudinal section of the first vortex section, the resistance to the coating material flowing from the first vortex section to the surface of the guide cover is small.

[0017] 3. In this invention, by setting up a sliding cylinder, a hollow cylinder, and a piston, when the filter element becomes clogged, the nozzle pressure decreases, causing the sliding cylinder to move the second ring plate closer to the nozzle. This reduces the lateral distance between the second and third ring plates, thus reducing the volume of the vortex cavity. As a result, the rebound force of large particles decreases after the spraying pressure decreases, and the large particles still rebound into the recessed part of the second vortex. In addition, with the movement of the piston, the air in the connecting cavity is squeezed into the annular air bladder, causing the annular air bladder to expand. This reduces the gap between the annular air bladder and the inner wall of the tube shell, further reducing the rebound of large particles. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of a corrosion-resistant coating spraying device for a shell-and-tube cooler according to the present invention; Figure 2 for Figure 1 A diagram illustrating the positional relationships from a first-person perspective. Figure 3 for Figure 1 A diagram illustrating the positional relationships from a second-person perspective; Figure 4 This is a schematic diagram showing the positional relationship of the filter element, the first ring plate, and the second ring plate after assembly in this invention. Figure 5 for Figure 4 Schematic diagram showing the positional relationship of the middle section after it has been cut open: Figure 6 for Figure 5 Enlarged schematic diagram of the local structure at point A: Figure 7 for Figure 5 Enlarged schematic diagram of the local structure at point B: Figure 8 for Figure 4 A diagram illustrating the positional relationship from another perspective; Figure 9 forFigure 8 Schematic diagram of the explosive decomposition of the medium structure: Figure 10 for Figure 9 A magnified schematic diagram of the local structure at point K.

[0020] Explanation of reference numerals in the attached drawings: 1. Paint delivery connection port; 2. Guide pipe; 3. Adjustment part; 4. Second hinge seat; 5. Support arm; 6. Roller; 7. Filter element; 8. First hinge seat; 9. Nozzle; 10. First ring plate; 11. Air pipe; 12. Second ring plate; 13. Stop ring; 14. Connecting part; 15. First vortex part; 16. Guide plate; 17. Hollow cylinder; 18. Guide plate; 19. Annular airbag; 20. Nozzle; 21. End cap; 22. Piston part; 23. Spring; 24. Connecting cavity; 25. Sliding cylinder; 26. Second vortex part; 27. Vortex cavity; 28. Guide cover. Detailed Implementation

[0021] 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.

[0022] This invention discloses a corrosion-resistant coating spraying device for shell-and-tube coolers.

[0023] Example 1: Refer to Figures 1-10This invention provides a corrosion-resistant coating spraying device for a shell-and-tube cooler, comprising: a guide pipe 2 with a paint delivery port 1 at one end; a filter element 7 installed at the end of the guide pipe 2 away from the paint delivery port 1; a nozzle 9 installed at the outlet end of the filter element 7; the nozzle 9 communicating with the interior of the guide pipe 2; multiple nozzles 20 arrayed along the axial direction of the nozzle 9; a first annular plate 10 fixedly fitted around the periphery of the nozzle 9; a guide plate 18 coaxially fixed to the outer edge of the first annular plate 10; the outer diameter of the guide plate 18 increasing sequentially away from the first annular plate 10; and a first vortex portion 15 coaxially fixed to the largest outer diameter end of the guide plate 18. The first annular plate 10, the guide plate 18, and the first vortex portion 15 together constitute the guide portion. The nozzle 9 is located away from the first annular plate 10. One end of the nozzle 9 is fixedly fitted with a second ring plate 12. Specifically, the second ring plate 12 is fitted around the nozzle 9. The nozzle 20 is located between the first ring plate 10 and the second ring plate 12. The guide plate 16 is coaxially fixed to the outer edge of the second ring plate 12. The outer diameter of the guide plate 16 increases sequentially in the direction of the adjacent guide plate 18. The mouth of the nozzle 20 corresponds to the guide plate 16. The outer diameter of the guide plate 16 is coaxially fixed to a second vortex portion 26. The first vortex portion 15 and the second vortex portion 26 form a vortex cavity 27. In addition, the second ring plate 12, the guide plate 16 and the second vortex portion 26 together constitute the guide portion. The first vortex portion 15 is coaxially fixed to a guide cover 28 at the end away from the guide plate 18. The outer diameter of the guide cover 28 increases sequentially in the direction of the second vortex portion 26. The longitudinal section of the guide cover 28 is tangent to the longitudinal section of the first vortex portion 15. A first hinge seat 8 is fixedly sleeved around the periphery of the filter element 7, and a second hinge seat 4 is slidably sleeved around the periphery of the guide tube 2. Each of the first hinge seat 8 and the second hinge seat 4 is hinged with a support arm 5. A roller 6 is rotatably connected to the end of the support arm 5 away from the guide tube 2. The support arms 5 on the first hinge seat 8 and the second hinge seat 4 are correspondingly hinged. An adjustment part 3 is threadedly sleeved around the periphery of the guide tube 2. The second hinge seat 4 is coaxially rotatably connected to the adjustment part 3. By manually rotating the adjustment part 3, the adjustment part 3 is threaded onto the guide tube 2, thereby causing the adjustment part 3 to move along the axial direction of the guide tube 2. When the adjustment part 3 moves, it will drive the second hinge seat 4 to move. When the second hinge seat 4 moves, it causes the support arm 5 to rotate, thereby causing the roller 6 to move along the radial direction of the guide tube 2. A connecting part 14 is coaxially fixed to the end of the nozzle 9. A sliding cylinder 25 is coaxially fixed to the second ring plate 12. The sliding cylinder 25 is slidably fitted onto the connecting part 14. A stop ring 13 is fixedly fitted onto the end of the connecting part 14 away from the second ring plate 12. A spring 23 is provided between the stop ring 13 and the sliding cylinder 25. The spring 23 is wrapped around the periphery of the connecting part 14. The two ends of the spring 23 elastically abut against the stop ring 13 and the sliding cylinder 25 respectively in the direction of the spring force. An annular airbag 19 is fixedly connected to the end of the second vortex part 26 away from the guide tube 2. An airbag 19 is coaxially fixed to the end face of the stop ring 13. A piston portion 22 is coaxially and fixedly fitted onto the hollow cylinder 17 and the sliding cylinder 25 at the end away from the nozzle 9. The piston portion 22 is coaxially and slidably engaged with the hollow cylinder 17. An end cap 21 is fixedly engaged at the end of the hollow cylinder 17 away from the stop ring 13. The outer periphery of the end cap 21 has an external thread section, and the inner wall of the hollow cylinder 17 has an internal thread section. The external thread section on the end cap 21 and the internal thread section on the hollow cylinder 17 are screwed together, thereby allowing the end cap 21 to be installed inside the hollow cylinder 17 and sealing the end of the hollow cylinder 17 away from the stop ring 13. The end cap 21 is slidably fitted onto the sliding cylinder 25. Specifically, the end cap 21 has a through hole for the sliding cylinder 25 to pass through freely, allowing the end cap 21 to slide around the periphery of the sliding cylinder 25. The end cap 21 and the piston portion 22 form a connecting cavity 24, which is sealed inside. An air tube 11 is installed on the annular airbag 19, with one end of the air tube 11, away from the annular airbag 19, penetrating the connecting cavity 24. Thus, the connecting cavity 24 is connected to the annular airbag 19 via the air tube 11. When the filter element 7 becomes clogged, the impact force of the coating on the second ring plate 12 decreases, causing the second ring plate 12 to be subjected to the elastic resisting force of the spring 23. This causes the second ring plate 12 to move towards the first ring plate 10, and the piston part 22 and the end cap 21 move relative to each other. This causes the air in the connecting cavity 24 to be compressed into the annular air bladder 19, and the annular air bladder 19 expands in volume. In addition, the connecting part 14 has an escape notch on its wall, so that when the piston part 22 slides in the hollow cylinder 17, it will not cause the space on the left side of the hollow cylinder 17 (see reference) to be blocked. Figure 6 The air inside the piston interferes with the movement of the piston section 22, and in addition, such as Figure 7 As shown, the distance between the outer edge of the guide cover 28 and the inner wall of the tube shell is defined as L1. After the annular airbag 19 expands in volume, the distance between the outer edge of the annular airbag 19 and the inner wall of the tube shell is defined as L2. L1 is less than L2, so that when the guide tube 2 moves, the annular airbag 19 will not scratch the already formed coating surface.

[0024] The working principle of this embodiment: The paint delivery port 1 is connected to a metal pipe, and the other end of the metal pipe is connected to an external paint delivery pump, which pumps the paint into the guide pipe 2. The guide pipe 2 is then placed into the shell of the tubular cooler, and the adjusting part 3 is manually rotated so that the adjusting part 3 is screwed onto the guide pipe 2. This allows the adjusting part 3 to move along the axial direction of the guide pipe 2. When the adjusting part 3 moves, it will drive the second hinge 4 to move. When the second hinge 4 moves, it will cause the support arm 5 to rotate, which will cause the roller 6 to move along the radial direction of the guide pipe 2. This allows the roller 6 to press against the inner wall of the shell and support the guide pipe 2. At the same time, the guide pipe 2 can move inside the shell, and at this time the guide pipe 2 and the shell are coaxial. After entering the guide tube 2, the paint is filtered by the filter element 7, which at least reduces the amount of large particles in the paint entering the nozzle 9. The filtered paint enters the nozzle 9 and is sprayed out at high speed by the nozzle 20, impacting the guide plate 16 for further atomization. The paint then splashes into the guide plate 18, greatly expanding the spray area. The paint flows along the guide plate 18 into the recessed area of ​​the first vortex section 15, where it flows. It then flows along the surface of the first vortex section 15 to the guide cover 28, where it impacts the inner wall of the tube shell. Large particles in the paint (to ensure the coating) are removed. The pressure is such that the mesh size of the filter element 7 is usually not set too high to prevent the paint from encountering too much resistance when passing through the filter element 7, which would lead to a drop in spraying pressure. Therefore, some large particles will not be filtered by the filter element 7 and will pass through the filter element 7 into the nozzle 9. They will impact the inner wall of the tube shell and cause a rebound. After the large particles rebound, they will directly enter the recessed part of the second vortex section 26. In addition, after the paint enters the vortex cavity 27, the paint spraying range expands, which can produce a mixing effect in the recessed part of the first vortex section 15, resulting in a better paint mixing effect. At the same time, the paint can be evenly distributed in the vortex cavity 27, which allows the paint to be evenly sprayed onto the inner wall of the tube shell. When filter element 7 becomes clogged, the spraying pressure of the paint decreases, which reduces the impact force on the second ring plate 12. At this time, the compressive force of the second ring plate 12 on the spring 23 decreases, and the elastic potential energy stored in the spring 23 is released, causing the spring 23 to drive the second ring plate 12 to move towards the first ring plate 10. This reduces the lateral distance between the first ring plate 10 and the second ring plate 12, and at the same time reduces the internal volume of the vortex cavity 27. Although the paint spraying pressure decreases, reducing the kinetic energy of large particles rebounding on the inner wall of the tube, the reduced volume of the vortex cavity 27 means that even with reduced kinetic energy, the large particles will still rebound into the recessed part of the second vortex section 26. Simultaneously, the piston section 22 and the end cap 21 move relative to each other, causing the air in the connecting cavity 24 to be compressed into the annular air bladder 19. The annular air bladder 19 expands, further reducing the gap between the annular air bladder 19 and the inner wall of the tube, making it difficult for large particles to escape from the gap between the annular air bladder 19 and the inner wall of the tube.

[0025] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A corrosion-resistant coating spraying device for a shell-and-tube cooler, characterized in that, include: The guide pipe (2) has a paint delivery connection port (1) at one end and a filter element (7) installed at the other end. The guide pipe (2) is provided with a support unit. The outlet of the filter element (7) is equipped with a nozzle (9). Multiple nozzles (20) are installed around the nozzle (9). The flow guide includes a first annular plate (10), a flow guide plate (18), and a first vortex section (15). The first annular plate (10) is fixedly fitted around the nozzle (9). The flow guide plate (18) is coaxially fixed to the outer edge of the first annular plate (10). The outer diameter of the flow guide plate (18) increases sequentially in the direction away from the first annular plate (10). The first vortex section (15) is coaxially fixed to the end of the largest outer diameter of the flow guide plate (18). The guide section includes a second ring plate (12), a guide plate (16), and a second vortex section (26). The second ring plate (12) is fitted around the nozzle (9). The nozzle (20) is located between the first ring plate (10) and the second ring plate (12). The guide plate (16) is coaxially fixed to the outer edge of the second ring plate (12). The outer diameter of the guide plate (16) increases sequentially in the direction of the adjacent guide plate (18). The mouth of the nozzle (20) corresponds to the guide plate (16). The second vortex section (26) is coaxially fixed to the end of the guide plate (16) with the largest outer diameter. The first vortex section (15) and the second vortex section (26) form a vortex cavity (27).

2. The corrosion-resistant coating spraying equipment for tube-type coolers according to claim 1, characterized in that, The support unit includes a first hinge (8) fixedly sleeved around the periphery of the filter element (7), and a second hinge (4) slidably sleeved around the periphery of the guide tube (2). Each of the first hinge (8) and the second hinge (4) is hinged with a support arm (5). A roller (6) is rotatably connected to one end of the support arm (5) away from the guide tube (2). The support arms (5) on the first hinge (8) and the second hinge (4) are in a corresponding hinged state.

3. The corrosion-resistant coating spraying equipment for tube-type coolers according to claim 2, characterized in that, The guide tube (2) is threadedly fitted with an adjustment part (3) around its periphery, and the second hinge (4) is coaxially rotatably connected to the adjustment part (3).

4. The corrosion-resistant coating spraying equipment for tube-type coolers according to claim 1, characterized in that, The first vortex section (15) is coaxially fixed to a guide cover (28) at the end away from the guide plate (18). The outer diameter of the guide cover (28) increases sequentially in the direction of the second vortex section (26), and the longitudinal section of the guide cover (28) is tangent to the longitudinal section of the first vortex section (15).

5. The corrosion-resistant coating spraying equipment for tube-type coolers according to claim 1, characterized in that, The second ring plate (12) is slidably fitted around the nozzle (9). The nozzle (9) is provided with a damping unit, which gives the second ring plate (12) the potential energy to move toward the first ring plate (10).

6. The corrosion-resistant coating spraying equipment for tubular coolers according to claim 5, characterized in that, The damping unit includes a connecting part (14) coaxially fixed to the end of the nozzle (9), a sliding cylinder (25) coaxially fixed to the second ring plate (12), the sliding cylinder (25) being slidably fitted onto the connecting part (14), a stop ring (13) being fixedly fitted onto the end of the connecting part (14) away from the second ring plate (12), and an elastic element being provided between the stop ring (13) and the sliding cylinder (25).

7. The corrosion-resistant coating spraying equipment for tubular coolers according to claim 6, characterized in that, The elastic element is a spring (23) wrapped around the periphery of the connecting part (14), and the two ends of the spring (23) elastically abut against the stop ring (13) and the sliding cylinder (25) respectively in the direction of elastic force.

8. The corrosion-resistant coating spraying equipment for shell-and-tube coolers according to claim 6, characterized in that, The second vortex section (26) is fixed to an annular airbag (19) at one end away from the guide tube (2). The sliding cylinder (25) is provided with an expansion unit. The expansion unit is used to inflate the annular airbag (19) when the first ring plate (10) and the second ring plate (12) are relatively close, so that the volume of the annular airbag (19) expands.

9. The corrosion-resistant coating spraying equipment for tube-type coolers according to claim 8, characterized in that, The expansion unit includes a hollow cylinder (17) coaxially fixed to the end face of the stop ring (13). A piston part (22) is coaxially fixedly sleeved at the end of the sliding cylinder (25) away from the nozzle (9). The piston part (22) is coaxially slidably engaged with the hollow cylinder (17). An end cap (21) is fixedly engaged at the end of the hollow cylinder (17) away from the stop ring (13). The end cap (21) is slidably sleeved on the sliding cylinder (25), and a connecting cavity (24) is formed between the end cap (21) and the piston part (22). The connecting cavity (24) is connected to the annular airbag (19) through the air pipe (11).

10. The corrosion-resistant coating spraying equipment for tubular coolers according to claim 9, characterized in that, The connecting part (14) has an escaping notch on its wall.

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