A corrosion-resistant coating spraying device for shell-and-tube coolers

Abstract

This invention discloses a corrosion-resistant coating spraying device for a shell-and-tube cooler, relating to the technical field of spraying equipment. It includes a guide pipe, a paint delivery connection port, a filter element, a support unit, a nozzle, a spray head, and a guide section. The guide section includes a first annular plate, a guide plate, and a first vortex section. The guide section includes a second annular plate, a guide plate, and a second vortex section. In use, when the paint is sprayed from the nozzle, it is impacted by the guide plate, causing the paint to disperse and further atomize. After being impacted by the guide plate, the paint splashes onto the guide plate wall and then flows along the surface of the first vortex section, mixing the paint. Simultaneously, the paint impacts the inner wall of the shell, adhering to it and forming a corrosion-resistant coating. Large particles in the paint rebound off the inner wall of the shell and are bounced into the recessed area of ​​the second vortex section, thus preventing large particles from splashing onto the already formed coating surface.

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:

[0006] Flow guide pipe, one end has coating delivery connection, 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;

[0007] 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.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] 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.

[0016] 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 end of the sliding cylinder away from the nozzle is coaxially fixedly sleeved with a piston portion, the piston portion is coaxially slidingly clamped in the hollow cylinder, an end cover is fixedly clamped and installed at the end of the hollow cylinder away from the stop ring, 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.

[0017] 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.

[0018] 1、The present application, by arranging 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, the coating will splash into the wall surface of the flow guide plate, and then flow along the surface of the first vortex portion, so that the coating is mixed in the recessed portion of the first vortex portion, and 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, the large particles will be rebounded into the recessed portion 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, the mixing effect of the coating in the recessed portion of the first vortex portion can be achieved, so that the coating has good mixing effect, and the coating can be uniformly distributed in the vortex cavity, thereby enabling the coating to uniformly spray the inner wall of the pipe shell.

[0019] 2. The application, by setting the guide cover, so that the paint in the first vortex part along the surface of the guide cover impact to the tube shell inner wall, in addition, the guide cover outer diameter maximum end edge and tube shell inner wall close, so that the paint is not easy to produce escape, and due to the guide cover longitudinal section and the first vortex part longitudinal section circumference tangential state, so that the paint from the first vortex part to the surface of the guide cover resistance is smaller.

[0020] 3. The application, by setting the sliding cylinder, hollow cylinder and piston part, when the filter core produces the blocking phenomenon, the nozzle pressure decreases, so that the sliding cylinder drives the second ring plate to move close to the direction of the nozzle, and then the transverse distance between the first ring plate and the second ring plate is reduced, so that the vortex cavity volume is reduced, so that the paint rebounds after the spraying pressure is reduced. The rebound force of large particles is reduced, and the large particles are still rebounded into the recessed part of the second vortex part. In addition, with the movement of the piston part, the air in the communication cavity is extruded into the annular air bag, so that the volume of the annular air bag is expanded, and then the gap between the annular air bag and the inner wall of the tube shell is reduced, further reducing the rebound of large particles. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the corrosion-resistant coating spraying equipment for the tube cooler in the present application.

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the corrosion-resistant coating spraying equipment for the tube cooler in the present application. Figure 1 It is a schematic diagram of the position relationship of the first view in the present application.

[0024] Figure 3 It is a schematic diagram of the position relationship of the second view in the present application. Figure 1 It is a schematic diagram of the position relationship of the second view in the present application.

[0025] Figure 4 It is a schematic diagram of the position relationship of the filter core, the first ring plate and the second ring plate after assembly in the present application.

[0026] Figure 5 It is a schematic diagram of the position relationship of the filter core, the first ring plate and the second ring plate after assembly in the present application. Figure 4 It is a schematic diagram of the position relationship of the filter core, the first ring plate and the second ring plate after assembly in the present application.

[0027] Figure 6 It is a schematic diagram of the position relationship of the filter core, the first ring plate and the second ring plate after assembly in the present application. Figure 5 It is a schematic diagram of the position relationship of the filter core, the first ring plate and the second ring plate after assembly in the present application.

[0028] Figure 7 It is a schematic diagram of the position relationship of the filter core, the first ring plate and the second ring plate after assembly in the present application. Figure 5 It is a schematic diagram of the position relationship of the filter core, the first ring plate and the second ring plate after assembly in the present application.

[0029] Figure 8 For Figure 4 Another perspective position relation diagram of the application;

[0030] Figure 9 For Figure 8 Explanatory diagram of the structure of the application:

[0031] Figure 10 For Figure 9 Explanatory diagram of the local structure at K in the application.

[0032] The drawing label explanation: 1, paint delivery connection port; 2, flow guide pipe; 3, adjusting part; 4, second hinge base; 5, support arm; 6, roller; 7, filter core; 8, first hinge base; 9, spray head; 10, first ring plate; 11, air pipe; 12, second ring plate; 13, stop ring; 14, connecting part; 15, first scroll part; 16, guide plate; 17, hollow cylinder; 18, flow guide plate; 19, annular air bag; 20, nozzle; 21, end cover; 22, piston part; 23, spring; 24, communication cavity; 25, sliding cylinder; 26, second scroll part; 27, scroll cavity; 28, guide cover. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0034] The application discloses a kind of corrosion-resistant coating spraying equipment for tube cooler.

[0035] Example 1: refer to Figures 1-10For the first embodiment of the present application, a kind of anticorrosive coating spraying equipment for tube cooler is provided, the anticorrosive coating spraying equipment for tube cooler includes the flow guide pipe 2 with coating delivery connecting port 1 at one end, the filter core 7 is installed at the end of flow guide pipe 2 away from coating delivery connecting port 1, the outlet end of filter core 7 is installed with spray head 9, spray head 9 is in communication with the inside of flow guide pipe 2, in addition, a plurality of nozzles 20 are installed on spray head 9 along its axial direction, the periphery of spray head 9 is fixedly sleeved with first ring plate 10, the outer edge of first ring plate 10 is coaxially fixed with flow guide plate 18, the outer diameter of flow guide plate 18 increases in turn in the direction away from first ring plate 10, the outer diameter of the largest end of flow guide plate 18 is coaxially fixed with first vortex part 15, in addition, first ring plate 10, flow guide plate 18 and first vortex part 15 jointly constitute the flow guide part, the end of spray head 9 away from first ring plate 10 is fixedly sleeved with second ring plate 12, specifically, second ring plate 12 is sleeved on the periphery of spray head 9, nozzle 20 is arranged between first ring plate 10 and second ring plate 12, guide plate 16 is coaxially fixed on the outer edge of second ring plate 12, the outer diameter of guide plate 16 increases in turn in the direction adjacent to flow guide plate 18, and the mouth of nozzle 20 corresponds to guide plate 16, the outer diameter of the largest end of guide plate 16 is coaxially fixed with second vortex part 26, and a vortex cavity 27 is formed between first vortex part 15 and second vortex part 26, in addition, second ring plate 12, guide plate 16 and second vortex part 26 jointly constitute the guide part, the end of first vortex part 15 away from flow guide plate 18 is coaxially fixed with guide cover 28, the outer diameter of guide cover 28 increases in turn in the direction of second vortex part 26, and the longitudinal section of guide cover 28 is tangent to the longitudinal section of first vortex part 15;

[0036] The periphery of filter core 7 is fixedly sleeved with first hinge base 8, the periphery of flow guide pipe 2 is slidably sleeved with second hinge base 4, first hinge base 8 and second hinge base 4 are each hingedly connected with support arm 5, the end of support arm 5 away from flow guide pipe 2 is rotatably connected with roller 6, the support arms 5 on first hinge base 8 and second hinge base 4 are correspondingly in hinged state, the periphery of flow guide pipe 2 is threadedly sleeved with adjusting part 3, second hinge base 4 is coaxially rotatably connected to adjusting part 3, by manually rotating adjusting part 3, adjusting part 3 is threadedly screwed on flow guide pipe 2, and then adjusting part 3 moves along the axial direction of flow guide pipe 2, when adjusting part 3 moves, it drives second hinge base 4 to move, when second hinge base 4 moves, it makes support arm 5 rotate, and then roller 6 moves along the radial direction of flow guide pipe 2;

[0037] The end of the spray head 9 is coaxially fixed with a connecting part 14, the second ring plate 12 is coaxially fixed with a sliding cylinder 25, the sliding cylinder 25 is slidingly sleeved on the connecting part 14, the end of the connecting part 14 away from the second ring plate 12 is fixedly sleeved with a stop ring 13, a spring 23 is arranged between the stop ring 13 and the sliding cylinder 25, the spring 23 is sleeved on the periphery of the connecting part 14, and the two ends of the spring 23 in the elastic force direction are elastically abutted against the stop ring 13 and the sliding cylinder 25 respectively, the second scroll part 26 is fixedly connected with an annular air bag 19 away from the end of the flow guide pipe 2, the end face of the stop ring 13 is coaxially fixed with a hollow cylinder 17, the end of the sliding cylinder 25 away from the spray head 9 is coaxially fixedly sleeved with a piston part 22, the piston part 22 is coaxially and slidingly clamped in the hollow cylinder 17, the end of the hollow cylinder 17 away from the stop ring 13 is fixedly clamped with an end cover 21, the outer periphery of the end cover 21 is provided with an external thread section, the inner wall of the hollow cylinder 17 is provided with an internal thread section, the external thread section on the end cover 21 is screwed with the internal thread section on the hollow cylinder 17, so that the end cover 21 can be installed in the hollow cylinder 17, and the end part of the hollow cylinder 17 away from the stop ring 13 is closed, at the same time, the end cover 21 is slidingly sleeved on the sliding cylinder 25, specifically, the end cover 21 is provided with a through hole for the sliding cylinder 25 to pass through freely, so that the end cover 21 can slide on the periphery of the sliding cylinder 25, so that the end cover 21 is slidingly sleeved on the periphery of the sliding cylinder 25, and a communication cavity 24 is formed between the end cover 21 and the piston part 22, the inside of the communication cavity 24 is closed, the annular air bag 19 is provided with an air pipe 11, the end of the air pipe 11 away from the annular air bag 19 penetrates into the communication cavity 24, so that the communication cavity 24 is in communication with the annular air bag 19 through the air pipe 11, when the filter core 7 is blocked, the impact force of the coating on the second ring plate 12 is reduced, so that the second ring plate 12 is elastically abutted by the spring 23, and then the second ring plate 12 moves towards the first ring plate 10, the piston part 22 moves relative to the end cover 21, so that the air in the communication cavity 24 is extruded to the annular air bag 19, the volume of the annular air bag 19 expands, in addition, the wall of the connecting part 14 is provided with an escape gap, so that when the piston part 22 slides in the hollow cylinder 17, the air in the left space (refer to Figure 6 ) of the hollow cylinder 17 does not interfere with the movement of the piston part 22, in addition, as Figure 7 shown, the distance between the outer edge of the guide cover 28 and the inner wall of the pipe shell is defined as L1, after the volume of the annular air bag 19 expands, the distance between the outer edge of the annular air bag 19 and the inner wall of the pipe shell is defined as L2, L1 is less than L2, so that when the flow guide pipe 2 moves, the annular air bag 19 will not scratch the surface of the coating which has been formed.

[0038] The working principle of the embodiment is as follows:

[0039] The paint conveying connection port 1 is connected by a metal pipe, the other end of the metal pipe is connected with an external paint conveying pump, so that the paint conveying pump pumps paint into the flow guide pipe 2, then the flow guide pipe 2 is placed into the tube shell of the column tube cooler, and the adjusting part 3 is manually rotated to be screwed on the flow guide pipe 2, so that the adjusting part 3 moves along the axial direction of the flow guide pipe 2, and when the adjusting part 3 moves, the second hinge base 4 moves, the supporting arm 5 rotates, and then the roller 6 moves along the radial direction of the flow guide pipe 2, so that the roller 6 can abut against the inner wall of the tube shell and support the flow guide pipe 2, and at the same time, the flow guide pipe 2 can move in the tube shell, and at this time, the flow guide pipe 2 is coaxial with the tube shell;

[0040] After the paint enters the flow guide pipe 2, the paint is filtered by the filter element 7, so that at least a certain degree of large particles in the paint enter the nozzle 9, the filtered paint enters the nozzle 9 and is sprayed at high speed by the nozzle 20, impacts the guide plate 16, and then the paint is further atomized, and then the paint splashes into the flow guide plate 18, so that the paint spraying range is greatly increased, and the paint flows along the flow guide plate 18 to the recessed part of the first vortex part 15, so that the paint flows in the recessed part of the first vortex part 15, and then flows along the surface of the first vortex part 15 to the guide cover 28, so that the paint impacts the inner wall of the tube shell along the surface of the guide cover 28, and the large particles in the paint (in order to ensure the spraying pressure of the paint, the mesh number of the filter element 7 is usually not set too large, so as to prevent the paint from being subjected to large resistance when passing through the filter element 7, and then causing the spraying pressure to decrease, and therefore, part of the large particles cannot be filtered by the filter element 7 and enter the nozzle 9) impacts the inner wall of the tube shell and rebounds, and after the large particles rebound, they directly enter the recessed part of the second vortex part 26, and in addition, after the paint enters the vortex cavity 27, due to the expansion of the paint spraying range, a mixing effect is generated in the recessed part of the first vortex part 15, so that the paint mixing effect is good, and at the same time, the paint can be uniformly distributed in the vortex cavity 27, and then the paint can uniformly spray the inner wall of the tube shell;

[0041] When the filter core 7 is blocked, the spraying pressure of the paint is reduced, and the impact force on the second ring plate 12 is reduced. At this time, the compression force of the second ring plate 12 on the spring 23 is reduced, the elastic potential energy accumulated in the spring 23 is released, the spring 23 drives the second ring plate 12 to move towards the first ring plate 10, and the lateral distance between the first ring plate 10 and the second ring plate 12 is reduced, and the internal volume of the vortex cavity 27 is reduced. Thus, although the spraying pressure of the paint is reduced, the kinetic energy of the large particles rebounding on the inner wall of the tube shell is reduced, and due to the reduced volume of the vortex cavity 27, the large particles can still rebound into the recessed part of the second vortex part 26 under the premise of reduced kinetic energy, and the piston part 22 and the end cover 21 move relatively, so that the air in the communication cavity 24 is squeezed into the annular air bag 19. The volume of the annular air bag 19 is expanded, so that the gap between the annular air bag 19 and the inner wall of the tube shell is further reduced, so that the large particles are not easy to escape from the gap between the annular air bag 19 and the inner wall of the tube shell.

[0042] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A tube cooler corrosion resistant coating spraying apparatus characterized by, The utility model relates to a paint spraying device, including: A flow guide pipe (2) has a paint conveying connecting port (1) at one end, a filter element (7) is installed at the other end, the flow guide pipe (2) is provided with a support unit, a nozzle (9) is installed at the outlet of the filter element (7), a plurality of nozzles (20) are installed on the periphery of the nozzle (9); A flow guide part includes a first ring plate (10), a flow guide plate (18) and a first vortex part (15), the first ring plate (10) is fixedly sleeved on the periphery of the nozzle (9), the flow guide plate (18) is coaxially fixedly connected to the outer edge of the first ring plate (10), the outer diameter of the flow guide plate (18) gradually increases in the direction away from the first ring plate (10), and the first vortex part (15) is coaxially fixedly connected to the outer diameter maximum end of the flow guide plate (18); A guide part includes a second ring plate (12), a guide plate (16) and a second vortex part (26), the second ring plate (12) is sleeved on the periphery of the nozzle (9), the nozzles (20) are arranged between the first ring plate (10) and the second ring plate (12), the guide plate (16) is coaxially fixedly connected to the outer edge of the second ring plate (12), the outer diameter of the guide plate (16) gradually increases in the direction adjacent to the flow guide plate (18), the nozzles (20) are correspondingly arranged on the guide plate (16), and the second vortex part (26) is coaxially fixedly connected to the outer diameter maximum end of the guide plate (16), and a vortex cavity (27) is formed between the first vortex part (15) and the second vortex part (26); The second ring plate (12) is slidably sleeved on the periphery of the nozzle (9), the nozzle (9) is provided with a damping unit, and the damping unit gives the second ring plate (12) potential energy in the direction of the first ring plate (10); The damping unit includes a connecting part (14) coaxially fixedly connected to the end of the nozzle (9), the second ring plate (12) is coaxially fixedly connected with a sliding cylinder (25), the sliding cylinder (25) is slidably sleeved on the connecting part (14), the connecting part (14) is fixedly sleeved with a stop ring (13) away from one end of the second ring plate (12), and an elastic element is arranged between the stop ring (13) and the sliding cylinder (25); The elastic element is a spring (23) sleeved on the periphery of the connecting part (14), and the spring (23) is elastically abutted on the stop ring (13) and the sliding cylinder (25) at both ends of the spring force direction.

2. The tube cooler corrosion resistant coating spray apparatus of claim 1, wherein, The support unit includes a first hinge base (8) fixedly sleeved on the periphery of the filter element (7), a second hinge base (4) is slidably sleeved on the periphery of the flow guide pipe (2), the first hinge base (8) and the second hinge base (4) are respectively hingedly connected with support arms (5), the support arms (5) are rotatably connected with rollers (6) away from one end of the flow guide pipe (2), and the support arms (5) on the first hinge base (8) and the second hinge base (4) correspondingly adopt a hinged state.

3. The tube cooler corrosion resistant coating spray apparatus of claim 2, wherein, A adjusting part (3) is threadedly sleeved on the periphery of the flow guide pipe (2), and the second hinge base (4) is coaxially rotatably connected to the adjusting part (3).

4. The tube cooler corrosion resistant coating spray apparatus of claim 1, wherein The first scroll part (15) is coaxially fixed with a guide cover (28) at one end away from the guide plate (18), the outer diameter of the guide cover (28) gradually increases towards the second scroll part (26), and the longitudinal section of the guide cover (28) is tangent to the longitudinal section of the first scroll part (15).

5. The tube cooler corrosion resistant coating spray apparatus of claim 1, wherein, The second scroll part (26) is fixed with a ring-shaped air bag (19) at one end away from the guide pipe (2), the sliding cylinder (25) is provided with an expansion unit, the expansion unit is used for inflating the ring-shaped air bag (19) when the first ring plate (10) and the second ring plate (12) relatively approach, so that the ring-shaped air bag (19) is expanded in volume.

6. The tube cooler corrosion resistant coating spray apparatus of claim 5, wherein, The expansion unit comprises a hollow cylinder (17) coaxially fixed on the end face of the stop ring (13), the sliding cylinder (25) is coaxially and fixedly sleeved with a piston part (22) at one end away from the nozzle (9), the piston part (22) is coaxially and slidingly clamped in the hollow cylinder (17), the hollow cylinder (17) is fixedly clamped and installed with an end cover (21) at one end away from the stop ring (13), the end cover (21) is slidingly sleeved on the sliding cylinder (25), and a communication cavity (24) is formed between the end cover (21) and the piston part (22), the communication cavity (24) is in communication with the ring-shaped air bag (19) through the air pipe (11).

7. The tube cooler corrosion resistant coating spray apparatus of claim 6, wherein, The connecting part (14) is provided with a dispersing notch on the wall surface.

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