Fixed tube sheet heat exchanger mechanical cleaning device

Abstract

The present invention provides a mechanical cleaning device for a fixed tube-sheet heat exchanger, which comprises a water tank, a driving assembly, a transmission assembly and multiple groups of cleaning members; a first cavity, a second cavity and a third cavity are arranged at the top of the water tank; the drainage end of the drain pipe of the water tank penetrates into the third cavity; the driving assembly is arranged in the first cavity, and the power output end of the driving assembly penetrates into the second cavity; the transmission assembly is arranged in the second cavity; the driving end of the transmission assembly is in transmission connection with the power output end, and the transmission assembly has multiple driven ends penetrating into the third cavity; multiple groups of cleaning members are arranged in the third cavity and are respectively connected to each driven end in one-to-one correspondence; the cleaning ends of the cleaning members extend out of the open side and are respectively used for extending into each tube bundle; the driving assembly is used for driving the cleaning members to rotate in the tube bundle through the transmission assembly. The mechanical cleaning device for the fixed tube-sheet heat exchanger provided by the present invention can extend the cleaning members into the interior of the tube bundle so as to perform deep cleaning on the interior of the tube bundle, and has a good cleaning effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of heat exchanger cleaning, and more specifically, relates to a mechanical cleaning device for a fixed tube-sheet heat exchanger. Background Art

[0002] A fixed tube-sheet heat exchanger is an energy-saving device for realizing heat transfer between materials, and a plurality of tube bundles are arranged inside. After the heat exchanger is used for a long time, scale will form on the inner wall of the tube bundles. When the scale accumulates to a certain extent inside the tube bundles, it not only affects the normal heat exchange operation of the heat exchanger, but also easily causes safety accidents and threatens personal safety.

[0003] Therefore, during the use of the heat exchanger, it is necessary to clean the inside of the tube bundles in time. In the prior art, when cleaning the inside of the tube bundles, pickling solutions are usually used for soaking and flushing. However, after multiple flushing and cleaning operations, there will still be some dirt remaining inside the tube bundles, and thorough cleaning cannot be achieved. Summary of the Invention

[0004] The purpose of the present invention is to provide a mechanical cleaning device for a fixed tube-sheet heat exchanger, aiming to solve the technical problem that the cleaning of the heat exchanger tube bundles is not thorough and dirt is likely to remain.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: to provide a mechanical cleaning device for a fixed tube-sheet heat exchanger, including:

[0006] A water tank, on the top of which there are arranged a first cavity, a second cavity and a third cavity in sequence; the side of the third cavity away from the second cavity is open; a drain pipe is arranged on the side wall of the water tank, and the drainage end of the drain pipe penetrates into the third cavity, and cleaning liquid is introduced into each tube bundle of the fixed tube-sheet heat exchanger through the open side of the third cavity;

[0007] A driving assembly, arranged in the first cavity, and the power output end of the driving assembly penetrates into the second cavity;

[0008] A transmission assembly, arranged in the second cavity; the driving end of the transmission assembly is in transmission connection with the power output end, and the transmission assembly has a plurality of driven ends penetrating into the third cavity; and

[0009] Multiple groups of cleaning parts, arranged in the third cavity and respectively connected to each of the driven ends in one-to-one correspondence; the cleaning ends of the cleaning parts extend out of the open side and are respectively used for extending into each of the tube bundles;

[0010] Wherein, the driving assembly is used to drive the cleaning parts to rotate inside the tube bundles through the transmission assembly.

[0011] In a possible implementation, multiple groups of scraping plates are circumferentially spaced on the cleaning member, and the scraping plates extend along the axial direction of the cleaning member; multiple bundles of bristles are arranged in an array between two adjacent groups of scraping plates.

[0012] The dirt attached to the surface layer is removed by the bristles, and the deep dirt inside the tube bundle is cleaned by the scraping plates, so as to achieve deep cleaning of the inner wall of the tube bundle and improve the cleaning effect.

[0013] In some embodiments, the cleaning member includes:

[0014] A scraping column, on which multiple groups of the scraping plates are circumferentially spaced; one end of the scraping column is connected to the driven end;

[0015] A brush tube, sleeved outside the scraping column and coaxial with the scraping column; one end of the brush tube is connected to the driven end; multiple groups of avoiding grooves respectively adapted for the corresponding scraping plates to pass through are circumferentially spaced on the brush tube, and the bristles are connected between two adjacent groups of avoiding grooves; and

[0016] A brush head, arranged at the other end of the brush tube; the brush head is fixedly connected to the scraping column;

[0017] Wherein, the driven end drives the scraping column and the brush tube to rotate together.

[0018] Exemplarily, multiple groups of rotating rods are circumferentially spaced on the scraping column, and each group of scraping plates is respectively rotatably connected to each group of rotating rods; when the scraping column rotates in the brush tube, the scraping plates are used to rotate around the rotating rods to change the length of the scraping plates protruding from the brush tube.

[0019] In some embodiments, a connecting member is connected to the driven end, the connecting member is rotatably connected to the wall between the second cavity and the third cavity, and one end of the connecting member extends into the third cavity and is respectively connected to the scraping column and the brush tube.

[0020] Exemplarily, the connecting member includes:

[0021] A first connecting section, rotatably connected to the wall between the second cavity and the third cavity; a first connecting hole is arranged at one end of the first connecting section, and the first connecting hole is connected to the driven end;

[0022] An intermediate section, arranged at the other end of the first connecting section; and

[0023] The second connecting section is connected to the side of the middle section opposite to the first connecting section at one end; a second connecting hole is formed at the other end of the second connecting section, and the brush tube is connected in the second connecting hole; a third connecting hole is recessed from the bottom of the second connecting hole towards the middle section, and the scraping column is connected in the third connecting hole.

[0024] In some embodiments, an annular cavity is formed between the outer peripheral wall of the scraping column and the inner peripheral wall of the brush tube; an opening communicating with the annular cavity is provided on the brush head;

[0025] An annular channel communicating with the annular cavity is provided in the middle section; a connection port is provided on one side of the middle section close to the second connecting section, and the connection port communicates with the channel;

[0026] Wherein, the connection port is used for connecting with the drain pipe, and the drain pipe introduces flushing water flow into the annular cavity through the connection port and the channel, and the flushing water flow entering the annular cavity flows out from the brush head.

[0027] In a possible implementation manner, the transmission assembly includes:

[0028] A driving gear, provided at the power output end;

[0029] A first transmission shaft, arranged along the axial direction of the cleaning member; one end of the first transmission shaft is rotatably arranged on the chamber wall between the second chamber and the third chamber, and the other end is one of the driven ends;

[0030] A first gear, provided at one end of the first transmission shaft close to the first chamber; the first gear meshes with the driving gear;

[0031] A second gear, provided at the other end of the first transmission shaft;

[0032] Two second transmission shafts, both parallel to the first transmission shaft and symmetrically distributed on both sides of the first transmission shaft; one end of the second transmission shaft is rotatably arranged on the chamber wall between the first chamber and the second chamber, and the other end is one of the driven ends; and

[0033] Two third gears, respectively provided on the two groups of second transmission shafts and both meshing with the second gear.

[0034] The power is transmitted from the driving component to the transmission component through the meshing of the driving wheel and the first gear; the first gear drives the first transmission shaft to rotate, so as to drive the cleaning member to rotate through the driven end of the first transmission shaft; the first transmission shaft drives the second gear to rotate, and through the meshing of the second gear and the third gear, the second transmission shaft is driven to rotate, so as to drive the cleaning member to rotate through the driven end of the second transmission shaft.

[0035] In some embodiments, a first transmission shaft is respectively arranged on both axial sides of the driving gear, and the first gears on the two first transmission shafts are arranged at intervals along the axial direction of the first transmission shaft; the first gears on the two first transmission shafts are sequentially meshed with the driving gear at the power output end.

[0036] Exemplarily, the driving assembly is slidably connected to the first cavity along the axial direction of the first transmission shaft. A driving cylinder is further arranged in the first cavity. The output end of the driving cylinder is connected to the driving assembly. The driving cylinder is used to push the driving assembly to move so that the driving gear is sequentially meshed with the two first gears.

[0037] Compared with the prior art, the solution shown in the embodiments of the present application passes a cleaning liquid into the tube bundle through a water tank to dissolve and remove some dirt in the tube bundle; the driving assembly drives the driving end of the transmission assembly to rotate, and the driven end of the transmission assembly drives the cleaning member to rotate in the tube bundle to clean the deposited dirt in the tube bundle, thereby improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0039] Figure 1 It is a schematic structural diagram of a mechanical cleaning device for a fixed tube sheet heat exchanger provided by an embodiment of the present invention;

[0040] Figure 2 It is a schematic structural diagram of the connection of the transmission assembly provided by an embodiment of the present invention;

[0041] Figure 3 It is a schematic connection structure diagram of the cleaning member and the connecting member provided by an embodiment of the present invention;

[0042] Figure 4 For Figure 3 the partial enlarged view at A in

[0043] Figure 5 It is the front view structural diagram of the connection structure of the cleaning member and the connecting member provided by an embodiment of the present invention;

[0044] Figure 6 It is the sectional structural diagram of the connection structure of the cleaning member and the connecting member provided by an embodiment of the present invention;

[0045] Figure 7Structural schematic of the squeegee provided by the embodiment of the present invention Figure 1 ;

[0046] Figure 8 Structural schematic of the squeegee provided by the embodiment of the present invention Figure 2 。

[0047] In the figure: 1, water tank; 11, first cavity; 12, second cavity; 13, third cavity; 14, drain pipe; 15, slideway; 2, drive assembly; 21, slider; 3, transmission assembly; 31, driving gear; 32, first transmission shaft; 33, first gear; 34, second gear; 35, second transmission shaft; 36, third gear; 4, cleaning member; 41, scraping column; 411, squeegee; 412, rotating rod; 42, brush pipe; 421, bristles; 422, avoidance groove; 43, brush head; 44, annular cavity; 45, opening; 5, connecting member; 51, first connecting section; 511, first connecting hole; 52, middle section; 521, channel; 522, connecting port; 53, second connecting section; 531, second connecting hole; 532, third connecting hole; 6, driving cylinder. Detailed implementation manners

[0048] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0049] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0050] The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a number of" is two or more, unless otherwise specifically defined.

[0051] Please refer to together Figures 1 to 8, the mechanical cleaning device for a fixed tube-sheet heat exchanger provided by the present invention will be described. The mechanical cleaning device for a fixed tube-sheet heat exchanger includes a water tank 1, a driving component 2, a transmission component 3, and multiple groups of cleaning components 4; the top of the water tank 1 is provided with a first cavity 11, a second cavity 12, and a third cavity 13 arranged in sequence; one side of the third cavity 13 away from the second cavity 12 is open; a drain pipe 14 is provided on the side wall of the water tank 1, and the drainage end of the drain pipe 14 penetrates into the third cavity 13, and cleaning liquid is introduced into each tube bundle of the fixed tube-sheet heat exchanger through the open side of the third cavity 13; the driving component 2 is arranged in the first cavity 11, and the power output end of the driving component 2 penetrates into the second cavity 12; the transmission component 3 is arranged in the second cavity 12; the driving end of the transmission component 3 is in transmission connection with the power output end, and the transmission component 3 has multiple driven ends penetrating into the third cavity 13; multiple groups of cleaning components 4 are arranged in the third cavity 13 and are respectively connected to each driven end in one-to-one correspondence; the cleaning end of the cleaning component 4 extends out of the open side and is used to respectively extend into each tube bundle; wherein, the driving component 2 is used to drive the cleaning component 4 to rotate in the tube bundle through the transmission component 3.

[0052] Optionally, the cleaning liquid is selected as an acidic solution for dissolving the scale on the inner wall of the tube bundle.

[0053] Specifically, after the cleaning liquid dissolves part of the scale on the inner wall of the tube bundle, the cleaning component 4 is driven to rotate by the driving component 2, so that the cleaning component 4 cleans the deep scale on the inner wall of the tube bundle.

[0054] Compared with the prior art, the mechanical cleaning device for a fixed tube-sheet heat exchanger provided by the present invention introduces cleaning liquid into the tube bundle through the water tank 1 to dissolve and remove part of the dirt in the tube bundle; the driving component 2 drives the driving end of the transmission component 3 to rotate, so that the driven end of the transmission component 3 drives the cleaning component 4 to rotate in the tube bundle to clean the deposited dirt in the tube bundle, thereby improving the cleaning effect.

[0055] Please refer to Figures 2 to 6 , in some possible embodiments, multiple groups of scraping plates 411 are arranged at circumferential intervals of the cleaning component 4, and the scraping plates 411 extend along the axial direction of the cleaning component 4; multiple bundles of bristles 421 are arranged in an array between two adjacent groups of scraping plates 411.

[0056] The dirt attached to the surface layer is removed by the bristles 421, and the deep dirt in the tube bundle is cleaned by the scraping plates 411 to achieve deep cleaning of the inner wall of the tube bundle and improve the cleaning effect.

[0057] Please refer to Figure 5 and Figure 6, in some embodiments, the cleaning member 4 includes a scraping column 41, a brush tube 42 and a brush head 43; a plurality of groups of scraping plates 411 are circumferentially and spacedly arranged on the scraping column 41; one end of the scraping column 41 is connected to the driven end; the brush tube 42 is sleeved outside the scraping column 41 and is coaxial with the scraping column 41; one end of the brush tube 42 is connected to the driven end; a plurality of groups of avoiding grooves 422 respectively adapted for the corresponding scraping plates 411 to pass through are circumferentially and spacedly arranged on the brush tube 42, and bristles 421 are connected between adjacent two groups of avoiding grooves 422; the brush head 43 is arranged at the other end of the brush tube 42; the brush head 43 is fixedly connected to the scraping column 41; wherein, the driven end of the transmission assembly 3 drives the scraping column 41 and the brush tube 42 to rotate together.

[0058] The driven end of the transmission assembly 3 drives the brush tube 42 and the scraping column 41 to rotate in the tube bundle, and the brush head 43 rotates with the scraping column 41 to clean the inner wall of the tube bundle.

[0059] Exemplarily, a plurality of groups of rotating rods 412 are circumferentially and spacedly arranged on the scraping column 41, and each group of scraping plates 411 is respectively and rotatably connected to each group of rotating rods 412; when the scraping column 41 rotates in the brush tube 42, the scraping plates 411 are used for rotating around the rotating rods 412 to change the length of the scraping plates 411 extending out of the brush tube 42.

[0060] Specifically, the scraping plates 411 have different extending lengths, and Figure 7 and Figure 8 two different extending lengths of the scraping plates 411 are given in the appendix as an illustration; when using the cleaning member 4, first, the surface dirt on the inner wall of the tube bundle is cleaned off by the rotation of the bristles 421; then, the brush tube 42 is rotated to make the scraping plates 411 rotate around the rotating rods 412 on the scraping column 41, and the extending length of the scraping plates 411 is increased so that the extending ends of the scraping plates 411 extend out of the bristles 421, so that when the cleaning member 4 rotates, the scraping plates 411 can clean the deep - layer dirt in the tube bundle.

[0061] In addition, when using the scraping plates 411 to clean the deep - layer dirt, due to the stronger adhesion of the dirt, the wear of the scraping plates 411 themselves is relatively serious. After being used for a period of time, the edge part of the scraping plates 411 will be gradually worn away. Therefore, by changing the extending length of the scraping plates 411, it can always be ensured that the extending part of the scraping plates 411 can clean the deep - layer dirt in the tube bundle.

[0062] When adjusting the extending length of the scraping plates 411, the driving assembly 2 needs to be stopped; it should be noted that the brush tube 42 and the scraping column 41 can rotate relative to each other. When the brush tube 42 is rotated, the scraping column 41 does not move, and the brush tube 42 drives the scraping plates 411 on the scraping column 41 to rotate around the rotating rods 412 to change the extending length of the scraping plates 411.

[0063] Please refer to Figure 3, in some embodiments, a connecting member 5 is connected to the driven end. The connecting member 5 is rotatably connected to the chamber wall between the second chamber 12 and the third chamber 13. One end of the connecting member 5 extending into the third chamber 13 is respectively connected to the scraping column 41 and the brush tube 42.

[0064] The stable connection between the cleaning member 4 and the driven end of the transmission assembly 3 is achieved through the connecting member 5.

[0065] Please refer to Figure 6 , exemplarily, the connecting member 5 includes a first connecting section 51, an intermediate section 52, and a second connecting section 53; the first connecting section 51 is rotatably connected to the chamber wall between the second chamber 12 and the third chamber 13; one end of the first connecting section 51 is provided with a first connecting hole 511, and the first connecting hole 511 is connected to the driven end; the intermediate section 52 is arranged at the other end of the first connecting section 51; one end of the second connecting section 53 is connected to the side of the intermediate section 52 opposite to the first connecting section 51; the other end of the second connecting section 53 is provided with a second connecting hole 531, and the brush tube 42 is connected in the second connecting hole 531; a third connecting hole 532 is recessed from the bottom of the second connecting hole 531 towards the intermediate section 52, and the scraping column 41 is connected in the third connecting hole 532.

[0066] Optionally, the driven end of the transmission assembly 3 is screwed into the first connecting hole 511; or, the driven end of the transmission assembly 3 is welded in the first connecting hole 511. A threaded connection or welding can be selected between the third connecting hole 532 and the scraping column 41, so that the connecting member 5 fixes the driven end of the transmission assembly 3 and the scraping column 41 of the cleaning member 4, thereby enabling the transmission assembly 3 to drive the scraping column 41 to rotate, and the scraper 411 on the scraping column 41 drives the brush tube 42 to rotate.

[0067] It should be understood that the brush tube 42 is not fixedly connected to the second connecting hole 531. Optionally, the brush tube 42 is rotatably connected in the second connecting hole 531, and a limit pin is provided between the brush tube 42 and the scraping column 41. When adjusting the extending length of the scraper 411, the limit pin needs to be taken out first to achieve the relative rotation between the brush tube 42 and the scraping column 41. When the driven end of the transmission assembly 3 drives the brush tube 42 and the scraping column 41 to rotate together, the limit pin needs to be installed first to avoid the relative rotation between the brush tube 42 and the scraping column 41.

[0068] Please refer to Figure 6, in some embodiments, an annular cavity 44 is formed between the outer peripheral wall of the scraping column 41 and the inner peripheral wall of the brush tube 42; an opening 45 communicating with the annular cavity 44 is provided on the brush head 43; an annular channel 521 communicating with the annular cavity 44 is provided in the middle section 52; a connection port 522 is provided on one side of the middle section 52 close to the second connection section 53, and the connection port 522 communicates with the channel 521; wherein, the connection port 522 is used for connecting with the drain pipe 14, and the drain pipe 14 introduces a flushing water flow into the annular cavity 44 through the connection port 522 and the channel 521, and the flushing water flow entering the annular cavity 44 flows out from the brush head 43.

[0069] It should be understood that after the driving assembly 2 stops working, water is introduced into the connecting member 5, and the water flows along the connecting member 5 to reach the cleaning member 4 and flows out from the brush head 43 of the cleaning member 4; when the driving assembly 2 works, the drain pipe 14 is removed from the connection port 522.

[0070] Since the scraping plate 411 on the scraping column 41 extends out through the avoidance groove 422 on the brush tube 42, therefore, when the cleaning member 4 cleans the tube bundle, part of the dirt will enter the above-mentioned annular cavity 44 through the avoidance groove 422; therefore, in this application, the channel 521 and the connection port 522 are provided to flush out the dirt in the annular cavity 44.

[0071] Please refer to Figure 2 , in some possible embodiments, the transmission assembly 3 includes a driving gear 31, a first transmission shaft 32, a first gear 33, a second gear 34, two second transmission shafts 35 and two third gears 36; the driving gear 31 is arranged at the power output end; the first transmission shaft 32 is arranged along the axis of the cleaning member 4; one end of the first transmission shaft 32 is rotatably arranged on the wall between the second cavity 12 and the third cavity 13, and the other end is one of the driven ends; the first gear 33 is arranged at one end of the first transmission shaft 32 close to the first cavity 11; the first gear 33 meshes with the driving gear 31; the second gear 34 is arranged at the other end of the first transmission shaft 32; the two second transmission shafts 35 are both parallel to the first transmission shaft 32 and symmetrically distributed on both sides of the first transmission shaft 32; one end of the second transmission shaft 35 is rotatably arranged on the wall between the first cavity 11 and the second cavity 12, and the other end is one of the driven ends; the two third gears 36 are respectively arranged on the two groups of second transmission shafts 35 and both mesh with the second gear 34.

[0072] The power is transmitted from the driving assembly 2 to the transmission assembly 3 through the meshing of the driving gear and the first gear 33; the first gear 33 drives the first transmission shaft 32 to rotate, so as to drive the driven end of the first transmission shaft 32 to drive the cleaning member 4 to rotate; the first transmission shaft 32 drives the second gear 34 to rotate, and through the meshing of the second gear 34 and the third gear 36, the second transmission shaft 35 is driven to rotate, so as to drive the driven end of the second transmission shaft 35 to drive the cleaning member 4 to rotate.

[0073] Please refer to Figure 2 In some embodiments, a first transmission shaft 32 is provided on each of the two axial sides of the driving gear 31. The first gears 33 on the two first transmission shafts 32 are arranged at intervals along the axial direction of the first transmission shaft 32. The first gears 33 on the two first transmission shafts 32 are sequentially meshed with the driving gear 31 at the power output end.

[0074] Optionally, multiple sets of transmission gear sets can also be provided at the power output end of the first transmission shaft 32 and the driving assembly 2 to realize the sequential rotation of multiple sets of first transmission shafts 32. The structure of the transmission gear set can be set according to actual needs.

[0075] Optionally, the driving assembly 2 can be a driving motor, and the power output end of the driving motor is power-connected to the driving end of the transmission assembly 3 to drive the driving end of the transmission assembly 3 to rotate.

[0076] Please refer to Figure 1 and Figure 2 In some embodiments, the driving assembly 2 is slidably connected to the first cavity 11 along the axial direction of the first transmission shaft 32. A driving cylinder 6 is further provided in the first cavity 11. The output end of the driving cylinder 6 is connected to the driving assembly 2. The driving cylinder 6 is used to push the driving assembly 2 to move so that the driving gear 31 is sequentially meshed with the two first gears 33.

[0077] Optionally, the driving cylinder 6 can also be an electric telescopic member, as long as it can realize the function of driving the driving assembly 2 to move.

[0078] Please refer to Figure 1 Exemplarily, a slideway 15 is provided in the first cavity 11 along the extending direction of the cleaning member 4. A slider 21 adapted to the slideway 15 is provided on the driving assembly 2. The slider 21 is slidably disposed in the slideway 15.

[0079] By providing the slideway 15, the driving assembly 2 is limited, avoiding the driving assembly 2 deviating from the moving path and affecting the meshing transmission with the transmission assembly 3.

[0080] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Fixed tube sheet heat exchanger mechanical cleaning device, characterized in that, Comprising: A water tank with a first cavity, a second cavity, and a third cavity arranged in sequence at the top; the side of the third cavity away from the second cavity is open; a drain pipe is provided on the side wall of the water tank, and the drainage end of the drain pipe penetrates into the third cavity, and cleaning liquid is introduced into each tube bundle of the fixed tube sheet heat exchanger through the open side of the third cavity; A driving assembly arranged in the first cavity, and the power output end of the driving assembly penetrates into the second cavity; A transmission assembly arranged in the second cavity; the driving end of the transmission assembly is in transmission connection with the power output end, and the transmission assembly has a plurality of driven ends penetrating into the third cavity; And Multiple groups of cleaning members arranged in the third cavity and respectively connected to each of the driven ends in one-to-one correspondence; the cleaning end of the cleaning member extends out of the open side and is used to extend into each of the tube bundles respectively; the cleaning member includes a scraping column and a brush tube, and multiple groups of scraping plates are circumferentially and spacedly arranged on the scraping column, and the scraping plates extend along the axial direction of the cleaning member; one end of the scraping column is connected to the driven end; the brush tube is sleeved outside the scraping column; one end of the brush tube is connected to the driven end; wherein, the driven end drives the scraping column and the brush tube to rotate together; multiple groups of avoiding grooves respectively adapted for the scraping plates to pass through at corresponding positions are circumferentially and spacedly arranged on the brush tube, and bristles are connected between adjacent two groups of avoiding grooves; multiple groups of rotating rods are circumferentially and spacedly arranged on the scraping column, and each group of scraping plates is respectively rotatably connected to each group of rotating rods in one-to-one correspondence; when the scraping column rotates in the brush tube, the scraping plate is used to rotate around the rotating rod to change the length of the scraping plate extending out of the brush tube; Wherein, the driving assembly is used to drive the cleaning member to rotate in the tube bundle through the transmission assembly.

2. The mechanical cleaning device for a fixed tube-sheet heat exchanger according to claim 1, wherein The cleaning member further includes: A brush head arranged at the other end of the brush tube; the brush head is fixedly connected to the scraping column.

3. The mechanical cleaning device for a fixed tube-sheet heat exchanger according to claim 2, characterized in that, The driven end is connected with a connecting piece, the connecting piece is rotatably connected to the wall of the cavity between the second cavity and the third cavity, and one end of the connecting piece extends into the third cavity and is respectively connected to the scraping column and the brush tube.

4. The mechanical cleaning device for a fixed tube-sheet heat exchanger according to claim 3, characterized in that, The connecting piece includes: A first connecting section rotatably connected to the wall of the cavity between the second cavity and the third cavity; a first connecting hole is provided at one end of the first connecting section, and the first connecting hole is connected to the driven end; An intermediate section arranged at the other end of the first connecting section; and A second connecting section, one end of which is connected to the side of the intermediate section opposite to the first connecting section; a second connecting hole is opened at the other end of the second connecting section, and the brush tube is connected in the second connecting hole; a third connecting hole is recessed from the bottom of the second connecting hole towards the intermediate section, and the scraping column is connected in the third connecting hole.

5. The mechanical cleaning device for a fixed tube-sheet heat exchanger according to claim 4, wherein, An annular cavity is formed between the outer peripheral wall of the scraping column and the inner peripheral wall of the brush tube; an opening communicating with the annular cavity is provided on the brush head; An annular channel communicating with the annular cavity is provided in the intermediate section; A connection port is provided on one side of the intermediate section close to the second connecting section, and the connection port communicates with the channel; Wherein, the connection port is used to connect with the drain pipe, and the drain pipe passes the flushing water flow into the annular cavity through the connection port and the channel, and the flushing water flow entering the annular cavity flows out from the brush head.

6. The mechanical cleaning device for a fixed tube-sheet heat exchanger according to claim 1, wherein, The transmission assembly includes: A driving gear, arranged at the power output end; A first transmission shaft, arranged along the axial direction of the cleaning member; one end of the first transmission shaft is rotatably arranged on the chamber wall between the second chamber and the third chamber, and the other end is one of the driven ends; A first gear, arranged at one end of the first transmission shaft close to the first chamber; the first gear meshes with the driving gear; A second gear, arranged at the other end of the first transmission shaft; Two second transmission shafts, both parallel to the first transmission shaft and symmetrically distributed on both sides of the first transmission shaft; one end of the second transmission shaft is rotatably arranged on the chamber wall between the first chamber and the second chamber, and the other end is one of the driven ends; and Two third gears, respectively arranged on the two groups of second transmission shafts and both meshing with the second gear.

7. The mechanical cleaning device for a fixed tube-sheet heat exchanger according to claim 6, wherein, One first transmission shaft is respectively arranged on both axial sides of the driving gear, and the first gears on the two first transmission shafts are arranged at intervals along the axial direction of the first transmission shaft; the first gears on the two first transmission shafts are sequentially meshed with the driving gear at the power output end.

8. The mechanical cleaning device for a fixed tube-sheet heat exchanger according to claim 7, characterized in that, The driving assembly is slidably connected in the first chamber along the axial direction of the first transmission shaft. A driving cylinder is further arranged in the first chamber, and the output end of the driving cylinder is connected with the driving assembly. The driving cylinder is used to push the driving assembly to move so that the driving gear is sequentially meshed with the two first gears.

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