Flat cover tube box integral device applied to heat exchanger

Abstract

The invention relates to the field of flat cover tube boxes, and discloses a flat cover tube box integral device applied to a heat exchanger, the flat cover tube box integral device comprises a tube box cylinder and a flat cover main body, one end of the tube box cylinder is provided with a connecting flange, the tube box cylinder is installed at one end of the heat exchanger through the connecting flange, and the upper surface of the tube box cylinder is provided with a water inlet pipe; a water outlet pipe is arranged on the lower surface of the tube box barrel, a partition plate is transversely welded to the center of the surface of the tube box barrel and divides the inner space of the tube box barrel, the flat cover body is fixed to the end, away from a heat exchanger, of the tube box barrel, and a center barrel is arranged on the surface of the center of the partition plate along the axis of the tube box barrel. The central cylinder is opened backwards, the rotating shaft is arranged in the center of the isolation plate, the scraping strips are arranged on the two sides of the rotating shaft correspondingly, the rotating shaft can be rotated in a reciprocating mode within 180 degrees from the outside, the inner walls of the upper space and the lower space can be cleaned correspondingly, a flat cover does not need to be opened, and convenience is improved when the tube box is cleaned.

Description

Technical Field

[0001] The invention relates to the technical field of flat-cover tube boxes, in particular to an integrated flat-cover tube box device applied to a heat exchanger. Background Art

[0002] The flat cover tube box is an important part of the heat exchanger. It is mainly composed of two parts: the flat cover and the tube box cylinder. The flat cover is usually a round flat plate, which is sealed and connected to the tube box cylinder by bolts and other connectors. The tube box cylinder is a cylindrical container, which is used to accommodate components such as tube bundles. An isolation plate is set inside the tube box cylinder to divide the internal space of the tube box into two parts. These two spaces are connected to the two ends of the internal heat exchange tube to realize heat exchange.

[0003] A large amount of cooling medium will be injected into the pipe box during operation. After long-term use, large impurities will be attached to the inner wall of the pipe box. At this time, the inside needs to be cleaned. The existing pipe box has an isolation plate inside, so it is necessary to open the flat cover to make one side of the pipe box open, and then clean it manually. In order to ensure the sealing and pressure resistance of the pipe box during use, the pipe box and the flat cover must be connected by multiple bolts, which makes it cumbersome to open the pipe box and is not conducive to the cleaning work. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an integrated flat-cover pipe box device for use in a heat exchanger, which solves the problem of cleaning the inner wall of the pipe box.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a flat cover pipe box integrated device applied to a heat exchanger, comprising a pipe box cylinder and a flat cover main body, one end of the pipe box cylinder is provided with a connecting flange, the pipe box cylinder is installed at one end of the heat exchanger through the connecting flange, the upper surface of the pipe box cylinder is provided with a water inlet pipe, the lower surface of the pipe box cylinder is provided with a water outlet pipe, an isolation plate is horizontally welded at the center of the surface of the pipe box cylinder, the isolation plate separates the internal space of the pipe box cylinder, the flat cover main body is fixed to the end of the pipe box cylinder away from the heat exchanger, the central surface of the isolation plate is provided with a central tube along the axis of the pipe box cylinder, the central tube is open backwards, and open grooves are symmetrically opened on the surface of the central tube, and a cleaning mechanism is also provided on the surface of the isolation plate, and sewage collecting grooves are opened on both sides of the upper surface of the isolation plate, and sewage outlet holes are evenly opened at the bottom of the sewage collecting groove, and the sewage outlet holes connect the two spaces inside the pipe box cylinder.

[0006] Furthermore, a fixed internal threaded barrel is arranged on the rear side of the surface of the pipe box barrel, and a docking ear plate corresponding to the fixed internal threaded barrel is arranged on the surface of the flat cover body, and the docking ear plate and the fixed internal threaded barrel are fastened and fixed by bolts.

[0007] Further, the cleaning mechanism includes a rotating shaft rotatably disposed inside the central cylinder. Connecting rods are symmetrically arranged on both surfaces of the rotating shaft. The connecting rods penetrate through the open slots, and the two connecting rods on both sides are respectively placed on the upper and lower surfaces of the isolation plate.

[0008] Further, cross bars are connected to the ends of two connecting rods on the same side. A scraping strip is inlaid on the surface of the cross bar away from the connecting rod. The scraping strip is in contact with the inner wall of the tube box cylinder. Sealing plugs are uniformly arranged on one surface of the cross bar. The sealing plugs are adapted to the internal dimensions of the dirt outlet holes.

[0009] Further, a square hole is formed in the rear end surface of the rotating shaft. A control shaft rotatably penetrates through the center of the flat cover body. A knob is arranged at one end of the control shaft, and a docking square bolt adapted to the square hole is arranged at the other end of the control shaft.

[0010] Further, a protective ring is arranged at the center of the rear end surface of the flat cover body. A sealing end cover covers the rear end surface of the protective ring. The knob is placed behind the sealing end cover. A locking bolt horizontally and rotatably penetrates through one side of the protective ring. A fixing bolt is arranged at the end of the locking bolt. Positioning holes adapted to the fixing bolts are formed on the surface of the control shaft.

[0011] Further, a swinging block is arranged on the surface of the control shaft. A convex block is arranged inside the protective ring. A tension spring is connected between the swinging block and the convex block.

[0012] Further, a convex plug is arranged on the front end surface of the flat cover body. The convex plug is adapted to the internal dimensions of the tube box cylinder. A wire groove adapted to the isolation plate is formed on the surface of the convex plug.

[0013] The present invention provides an integral device of a flat cover tube box applied to a heat exchanger. It has the following beneficial effects: 1. In the present invention, a rotating shaft is arranged at the center of the isolation plate, and scraping strips are respectively arranged on both sides of the rotating shaft. The rotating shaft can be reciprocally rotated within 180° externally, and the inner walls of the upper and lower spaces can be respectively cleaned without opening the flat cover, improving the convenience during the cleaning of the tube box.

[0014] 2. In the present invention, dirt outlet holes are arranged on both sides of the isolation. Impurities in the upper space can flow into the lower space through the dirt outlet holes on both sides and are discharged through the water outlet pipe. And a plurality of sealing plugs are arranged on one side of the cross bar to block the dirt outlet holes through the sealing plugs when not cleaning, thereby ensuring the isolation of the two internal spaces and preventing the leakage of the cooling medium.

[0015] 3. After the cleaning work is completed, the outer tension spring of the present invention can make the rotating shaft return to its original position, so that the sealing plug can seal the sewage outlet hole when not under force, and the cross bar is horizontally placed on one side of the isolation plate to reduce the obstruction to the flow of the internal medium. The fixing bolt can ensure the fixation of the control shaft when not working, thereby ensuring the fixation of the position of the cleaning mechanism and further ensuring the sealing of the sewage outlet hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the installation three-dimensional view of the present invention; Figure 2 is the schematic rear view of the separation of the tube box and the flat cover of the present invention; Figure 3 is the schematic structural view of the flat cover of the present invention; Figure 4 is the schematic front view structural view of the flat cover of the present invention; Figure 5 is the Figure 1 sectional structural view of the present invention; Figure 6 is the schematic structural view of the isolation plate of the present invention; Figure 7 is the schematic view of the cleaning mechanism of the present invention; Figure 8 is the Figure 5 enlarged structural view of Area A of the present invention.

[0017] Wherein, 1. Tube box cylinder; 11. Connecting flange; 12. Water inlet pipe; 13. Water outlet pipe; 14. Isolation plate; 15. Sewage collection tank; 16. Sewage outlet hole; 17. Fixed internal thread cylinder; 18. Central cylinder; 19. Open slot; 2. Flat cover main body; 21. Docking ear plate; 22. Convex plug; 23. Thread groove; 24. Protective ring; 25. Convex block; 26. Locking bolt; 27. Fixed bolt; 3. Sealing end cover; 4. Control shaft; 41. Knob; 42. Docking square bolt; 43. Swing block; 44. Positioning hole; 5. Tension spring; 6. Cleaning mechanism; 61. Rotating shaft; 62. Square hole; 63. Connecting rod; 64. Cross bar; 65. Scraper; 66. Sealing plug. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the drawings of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0019] Refer to Figures 1-8As shown, a flat cover pipe box integral device applied to a heat exchanger comprises a pipe box cylinder 1 and a flat cover main body 2. A connecting flange 11 is provided at one end of the pipe box cylinder 1. The pipe box cylinder 1 is installed at one end of the heat exchanger through the connecting flange 11. A water inlet pipe 12 is provided on the upper surface of the pipe box cylinder 1. A water outlet pipe 13 is provided on the lower surface of the pipe box cylinder 1. An isolation plate 14 is welded horizontally at the center of the surface of the pipe box cylinder 1. The isolation plate 14 separates the internal space of the pipe box cylinder 1. The two spaces are respectively connected to the two ends of the heat exchange tube inside the heat exchanger. The flat cover main body 2 is fixed to the end of the pipe box cylinder 1 away from the heat exchanger, so that the inside of the pipe box cylinder 1 In a sealed state, high-temperature medium flows in through the water inlet pipe 12 and fills the upper space of the tube box cylinder 1, then flows into the multiple heat exchange tubes inside the heat exchanger for cooling, and flows back to the lower space of the tube box cylinder 1, and then flows out through the water outlet pipe 13 to achieve cooling. A fixed internal threaded cylinder 17 is provided on the rear side of the surface of the tube box cylinder 1, and a docking ear plate 21 corresponding to the fixed internal threaded cylinder 17 is provided on the surface of the flat cover main body 2. The docking ear plate 21 and the fixed internal threaded cylinder 17 are fixed by bolts to ensure the stability of the connection between the flat cover main body 2 and the tube box cylinder 1 and prevent leakage of the cooling medium.

[0020] Please refer to Figure 6 and Figure 7 As shown, a center tube 18 is provided on the center surface of the isolation plate 14 along the axis of the pipe box cylinder 1. The center tube 18 exceeds the upper and lower surfaces of the isolation plate 14 respectively, and the center tube 18 is open backwards. The surface of the center tube 18 is symmetrically provided with open grooves 19. There are at least two open grooves 19 on the same side, and both are opened up and down. A cleaning mechanism 6 is also provided on the surface of the isolation plate 14. Sewage collecting grooves 15 are provided on both sides of the upper surface of the isolation plate 14. Foreign bodies scraped off along the inner wall of the pipe box cylinder 1 flow into the interior of the sewage collecting groove 15, and flow into the lower space through multiple sewage outlet holes 16 at the bottom. Sewage outlet holes 16 are evenly provided at the bottom of the sewage collecting groove 15, and the sewage outlet holes 16 connect the two spaces inside the pipe box cylinder 1 to facilitate the discharge of sludge.

[0021] Please refer to Figure 6 and Figure 7 As shown, the cleaning mechanism 6 includes a rotating shaft 61 rotating inside the central tube 18, the diameter of the rotating shaft 61 is larger than the thickness of the isolation plate 14, and connecting rods 63 are symmetrically arranged on both side surfaces of the rotating shaft 61. The connecting rods 63 are eccentric to the axis of the rotating shaft 61, so that the connecting rods 63 on both sides can be placed on the upper and lower sides of the isolation plate 14 respectively, and the connecting rods 63 pass through the open groove 19. The connecting rods 63 on both sides are respectively placed on the upper and lower surfaces of the isolation plate 14, and rotating the rotating shaft 61 can drive the connecting rods 63 to rotate, and the rotation range is between 0-180°.

[0022] Among them, crossbars 64 are connected to the ends of two connecting rods 63 on the same side. The crossbars 64 are parallel to the rotating shaft 61. A scraping strip 65 is inlaid on the surface of the crossbar 64 facing away from the connecting rod 63. The scraping strip 65 is in contact with the inner wall of the tube sheet cylinder 1. By rotating the rotating shaft 61, the scraping strip 65 is driven to rotate along the inner wall of the tube sheet cylinder 1 to clean the inner wall. During cleaning, foreign matters on the inner wall will be scraped to one side, and the sludge above will flow into the lower space through the sewage outlet hole 16. Sealing plugs 66 are evenly arranged on one surface of the crossbar 64. The sealing plugs 66 are adapted to the internal dimensions of the sewage outlet hole 16 to seal the sewage outlet hole 16 and prevent the cross-flow of the cooling medium. During cleaning, the rotating shaft 61 can be rotated back and forth, and the connecting rod 63 is kept in a vertical position to facilitate the flow of sludge. Embodiment

[0023] Please refer to Figure 5 and Figure 8 As shown, a square hole 62 is opened on the rear end surface of the rotating shaft 61. A control shaft 4 rotates through the center of the surface of the flat cover main body 2. After the flat cover main body 2 is installed in place, the axes of the rotating shaft 61 and the control shaft 4 coincide. One end of the control shaft 4 is provided with a knob 41, and the other end of the control shaft 4 is provided with a docking square bolt 42 adapted to the square hole 62 to rotate the rotating shaft 61 through external control. A protective ring 24 is arranged at the center of the rear end surface of the flat cover main body 2. A sealing end cover 3 covers the rear end surface of the protective ring 24. The knob 41 is placed behind the sealing end cover 3 to control the cleaning mechanism 6 externally. A locking bolt 26 is screwed horizontally through one side of the protective ring 24. A fixing bolt 27 is arranged at the end of the locking bolt 26. A positioning hole 44 adapted to the fixing bolt 27 is opened on the surface of the control shaft 4. During cleaning, the locking bolt 26 is externally screwed to enable the control shaft 4 to rotate. On the contrary, when not working, the fixing bolt 27 can be made to enter the positioning hole 44 by rotating the locking bolt 26 to keep the rotating shaft 61 stable.

[0024] The orientation of the positioning hole 44 is the same as that of the connecting rod 63 to ensure that when the connecting rod 63 is in a horizontal state, the positioning hole 44 is also in a horizontal position.

[0025] Please refer to Figure 3 As shown, a swing block 43 is arranged on the surface of the control shaft 4. A convex block 25 is arranged inside the protective ring 24. A tension spring 5 is connected between the swing block 43 and the convex block 25. The pulling force of the tension spring 5 causes the rotating shaft 61 to return to its position when stressed. At this time, the connecting rod 63 is horizontal, and at this time, the sealing plug 66 seals the sewage outlet hole 16. Then, when not stressed, the cleaning mechanism 6 can automatically return to its position to ensure the stability of the sealing and the position of the positioning hole 44.

[0026] Please refer to Figure 4As shown in the figure, a convex plug 22 is provided on the front end face of the flat cover body 2. The convex plug 22 is adapted to the internal dimensions of the tube sheet cylinder 1, so that after the flat cover body 2 is installed in place, the sealing performance can be improved through the concave-convex matching structure to prevent the leakage of the coolant. A wire groove 23 adapted to the partition plate 14 is provided on the surface of the convex plug 22. When installed in place, the wire groove 23 can be stuck on the partition plate 14 to further improve the sealing performance between the two spaces inside the tube sheet cylinder 1. Embodiment

[0027] In this embodiment, in order to verify the convenience and efficiency of cleaning the inner wall of the tube sheet by reciprocating rotation of the external control rotating shaft within 180°, experiments were carried out using specific equipment and materials.

[0028] Equipment model: The overall flat cover tube sheet device with the model of H-1800 was used. The diameter of the tube sheet cylinder was 800 mm and the length was 1500 mm.

[0029] Materials: The scraping strip 65 is made of nylon material to ensure high wear resistance and elasticity; the sealing plug 66 is made of high-temperature resistant fluororubber.

[0030] Operation steps: The experimenter controlled the rotating shaft 61 to rotate reciprocally by 180° through the knob 41, each rotation for 3 minutes, and repeated 5 times in total.

[0031] The scraping strip 65 was used to clean the inner wall of the tube sheet cylinder 1 by friction. During the cleaning process, the friction resistance between the scraping strip and the inner wall and the sludge removal rate were compared respectively.

[0032] Experimental data:

[0033] Result analysis: By controlling the knob 41, the rotating shaft 61 was rotated reciprocally by 180°. The scraping strip effectively cleaned the inner walls of the upper and lower spaces, and the residual sludge amount decreased successively. There was no residue left after the 5th time, which proved that the device could achieve effective cleaning without opening the flat cover, improving the convenience and efficiency.

[0034] Formula: The cleaning efficiency formula is: η = (m 0 - m t) / m 0 * 100% Where η is the cleaning efficiency, m 0 is the initial sludge amount, and m t is the residual sludge amount after cleaning t times. Embodiment

[0035] This embodiment verified the effect of impurity discharge in the upper and lower spaces and the sealing performance of the sealing plug for the sewage outlet hole when not cleaned.

[0036] Equipment model: The overall device of the flat head tube sheet with the same model H-1800 is adopted. The width of the sewage collection tank 15 is 100 mm, the depth is 80 mm, and the diameter of the sewage outlet hole 16 is 20 mm.

[0037] Material: The sewage collection tank is made of SUS304 stainless steel, and the sealing plug 66 is made of fluororubber with good sealing performance.

[0038] Operation steps: Inject simulated sludge (glycerol suspension with a viscosity of 5000 cP) into the upper space to simulate impurities in the cooling medium.

[0039] Control the rotating shaft 61 to make the scraping strip 65 clean. The sludge in the upper part is discharged into the lower space through the sewage outlet hole 16 and discharged from the water outlet pipe 13.

[0040] Conduct a sealing test by rotating the locking bolt 26 to test the sealing performance of the sealing plug for the sewage outlet hole.

[0041] Experimental data:

[0042] Result analysis: The design of the sewage outlet hole 16 can effectively discharge the sludge in the upper space, and the sewage discharge efficiency increases successively with the number of experiments. The sealing effect of the sealing plug 66 on the sewage outlet hole is remarkable without cleaning, preventing the cross-flow of the cooling medium. Embodiment

[0043] In this embodiment, the effect of the tension spring 5 on the reset of the rotating shaft 61 and the maintenance of the seal is verified.

[0044] Equipment model: The overall device of the H-1800 flat head tube sheet. The diameter of the control shaft 4 is 25 mm, the length is 200 mm, and the stiffness coefficient k of the tension spring is 150 N / m.

[0045] Material: The control shaft 4 is made of carbon steel, and the tension spring 5 is made of 65Mn spring steel.

[0046] Operation steps: Release the control shaft 4 after the cleaning work is completed to make the tension spring 5 reset.

[0047] Record the time required for the rotating shaft 61 to reset from the application of force, and the effect of the sealing plug 66 to re-seal the sewage outlet hole.

[0048] Experimental data:

[0049] Result analysis: When not under force, the tension spring 5 can quickly reset the rotating shaft 61, and the reset time is stable between 1.1 - 1.3 seconds. The sealing plug 66 can also effectively seal the sewage outlet hole 16 to ensure the isolation of the internal space of the tube sheet and prevent medium leakage.

[0050] Formula: The reset force F is:

[0051] Among them, k is the stiffness coefficient of the tension spring, and x is the stretching displacement of the tension spring. The resilience of the tension spring resets the rotating shaft and ensures that the sealing plug is in place.

[0052] Through the above embodiments, it can be verified that the overall device of the flat head tube sheet of the present invention has excellent performance in terms of cleaning convenience, impurity discharge, and seal maintenance, effectively improving the use convenience and stability of the device.

[0053] Working principle: First, the cooperation of bolts and the connecting flange 11 is used to fix the tube sheet cylinder 1 and the heat exchanger. Then, the flat head main body 2 is installed, and the rear end of the tube sheet cylinder 1 is sealed by the flat head main body 2, making the inside of the tube sheet cylinder 1 in a sealed state. The convex plug 22 can enter the inside of the tube sheet cylinder 1 to further improve the isolation of the two spaces through the cooperation of the wire groove 23 and the isolation plate 14. After the docking of the tube sheet cylinder 1 and the flat head main body 2, the docking square bolt 42 can smoothly enter the square hole 62. At this time, the rotating shaft 61 can be driven to rotate by controlling the shaft 4 to control the position of the scraping strip 65. Due to the existence of the tension spring 5, the control shaft 4 maintains a certain angle when not under force. The connecting rods 63 on both sides are horizontally placed on the upper and lower surfaces of the isolation plate 14 and remain fixed. At this time, the sealing plug 66 seals the sewage outlet holes 16 on both sides to isolate the two spaces inside the tube sheet cylinder 1 from each other.

[0054] When cleaning is required, the external rotary knob 41 can be used to drive the control shaft 4 to rotate counterclockwise, and then drive the rotating shaft 61 to rotate. At this time, the scraping strips 65 on both sides can be controlled to rotate along the inner wall of the tube sheet cylinder 1 to realize the cleaning of the inner wall of the tube sheet cylinder 1. During the rotation of the cleaning mechanism 6, the sealing plug 66 no longer seals the sewage outlet hole 16. At this time, the sludge scraped from the upper space can flow along the inner wall of the tube sheet cylinder 1 to one side, and then the sludge enters the sewage collection tank 15 and flows into the lower space through the sewage outlet hole 16, so as to be discharged through the water outlet pipe 13 at the bottom.

[0055] Finally, after the cleaning is completed, due to the pulling of the tension spring 5, the cleaning mechanism 6 can be reset. At this time, the control shaft 4 remains at a fixed angle, and the sealing plug 66 seals the sewage outlet hole 16 again. One side is sealed from top to bottom, and the other side is sealed from bottom to top. At this time, the rotation of the locking bolt 26 can be used to control the end of the fixing bolt 27 to enter the positioning hole 44 to maintain fixation and prevent the seal from loosening due to the internal water flow.

[0056] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flat cover pipe box integrated device for a heat exchanger, comprising a pipe box cylinder (1) and a flat cover body (2), characterized in that: A connecting flange (11) is provided at one end of the pipe box cylinder (1), and the pipe box cylinder (1) is installed at one end of the heat exchanger via the connecting flange (11). A water inlet pipe (12) is provided on the upper surface of the pipe box cylinder (1), and a water outlet pipe (13) is provided on the lower surface of the pipe box cylinder (1). An isolation plate (14) is welded transversely to the center of the surface of the pipe box cylinder (1), and the isolation plate (14) divides the internal space of the pipe box cylinder (1). The flat cover body (2) is fixed to the end of the pipe box cylinder (1) away from the heat exchanger. The isolation plate (14) has a central tube (18) disposed on the central surface along the axis of the pipe box cylinder (1). The central tube (18) is open rearwards and has open grooves (19) symmetrically disposed on the surface of the central tube (18). The isolation plate (14) also has a cleaning mechanism (6) disposed on the surface. Sewage collecting grooves (15) are disposed on both sides of the upper surface of the isolation plate (14). Sewage outlet holes (16) are evenly disposed at the bottom of the sewage collecting grooves (15). The sewage outlet holes (16) communicate with two spaces inside the pipe box cylinder (1).

2. The flat cover tube box integrated device for heat exchanger according to claim 1, characterized in that: A fixed internally threaded cylinder (17) is provided on the rear side of the surface of the tube box cylinder (1), and a docking ear plate (21) corresponding to the fixed internally threaded cylinder (17) is provided on the surface of the flat cover main body (2), and the docking ear plate (21) and the fixed internally threaded cylinder (17) are fixed by bolts.

3. The flat cover tube box integrated device for heat exchanger according to claim 1, characterized in that: The cleaning mechanism (6) comprises a rotating shaft (61) rotating inside the central tube (18), and connecting rods (63) are symmetrically arranged on both side surfaces of the rotating shaft (61), and the connecting rods (63) penetrate the open groove (19). The connecting rods (63) on both sides are respectively placed on the upper and lower surfaces of the isolation plate (14).

4. The flat cover tube box integrated device for heat exchanger according to claim 3, characterized in that: The ends of the two connecting rods (63) on the same side are connected to a cross rod (64); a scraper strip (65) is inlaid on the surface of the cross rod (64) on the side facing away from the connecting rod (63); the scraper strip (65) is in contact with the inner wall of the tube box cylinder (1); and sealing plugs (66) are evenly arranged on the surface of one side of the cross rod (64); the sealing plugs (66) are adapted to the internal dimensions of the sewage outlet hole (16).

5. The flat cover tube box integrated device for heat exchanger according to claim 4, characterized in that: A square hole (62) is provided on the rear end surface of the rotating shaft (61); a control shaft (4) is rotatably penetrated through the center of the surface of the flat cover body (2); a knob (41) is provided at one end of the control shaft (4); and a docking square bolt (42) adapted to the square hole (62) is provided at the other end of the control shaft (4).

6. The flat cover tube box integrated device for heat exchanger according to claim 5, characterized in that: A protective ring (24) is arranged at the center of the rear end face of the flat cover body (2), and the rear end face of the protective ring (24) is covered with a sealing end cover (3). The knob (41) is arranged at the rear side of the sealing end cover (3). A locking bolt (26) is screwed horizontally through one side of the protective ring (24), and a fixing bolt (27) is arranged at the end of the locking bolt (26). A positioning hole (44) matched with the fixing bolt (27) is opened on the surface of the control shaft (4).

7. The flat cover tube box integrated device for heat exchanger according to claim 6, characterized in that: A swing block (43) is provided on the surface of the control shaft (4), a protrusion (25) is provided on the inner side of the protective ring (24), and a tension spring (5) is connected between the swing block (43) and the protrusion (25).

8. The flat cover tube box integrated device for heat exchanger according to claim 1, characterized in that: A convex plug (22) is provided on the front end surface of the flat cover body (2), the convex plug (22) is matched with the internal dimensions of the pipe box cylinder (1), and a linear groove (23) matched with the isolation plate (14) is provided on the surface of the convex plug (22).

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