Heat exchanger convenient to clean

Abstract

The utility model relates to the technical field of heat exchangers, and discloses a heat exchanger convenient to clean, which comprises a tank body, a liquid separation box is mounted at an opening of the tank body, a pipe fitting is jointly mounted in the liquid separation box and the tank body, and a brush head is arranged in a liquid inlet cavity of the liquid separation box. The brush heads and the pipe fittings are arranged in a one-to-one correspondence mode and can brush the inner walls of the pipe fittings, a force storage device and a recovery device are installed in the liquid inlet cavity, the recovery device is connected with the brush heads, the recovery device can recover the brush heads stretching into the pipe fittings into the liquid inlet cavity, and the force storage device can clamp the brush heads or push the brush heads into the pipe fittings. The device solves the problem that the inner wall of the pipe fitting is narrow and not easy to clean, cleaning of the inner wall of the pipe fitting is achieved by hydraulically pushing the built-in brush head, placement and recycling of the brush head are jointly achieved through the force storage device and the recycling device, and cleaning is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, and more specifically, it relates to a heat exchanger that is convenient to clean. Background Art

[0002] A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid. A commonly used shell-and-tube heat exchanger mainly consists of a shell, a tube bundle, a tube sheet, and tube heads. For the two fluids exchanging heat in the shell-and-tube heat exchanger, one flows inside the tubes and the other flows outside the tubes, and heat exchange occurs on the tube wall, making it easy for dirt to accumulate on the tube wall. When there is a lot of dirt on the tube wall, it is easy to cause a decrease in its heat exchange efficiency, so the heat exchanger needs to be cleaned regularly during use.

[0003] Common cleaning methods include chemical cleaning and physical cleaning. Chemical cleaning generates a chemical reaction through a chemical cleaning solution, making the dirt on the surface of the pipe fittings dissolve, fall off, or peel off. It does not require disassembling the heat exchanger and is easy to operate, but it is easy to corrode and damage the matrix, affecting the service life of the heat exchanger;

[0004] Physical cleaning is to use various mechanical external forces to crush, separate, and peel off the dirt from the surface of the object to achieve cleaning. However, when cleaning, the heat exchanger needs to be disassembled, and the inner wall of the pipe fittings of the heat exchanger is narrow and small, making it difficult to clean. Summary of the Utility Model

[0005] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a heat exchanger that is convenient to clean.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A heat exchanger that is convenient to clean, including a tank body. A liquid distribution box is installed at the opening of the tank body. Pipe fittings are installed in both the liquid distribution box and the tank body. A brush head is arranged in the liquid inlet cavity of the liquid distribution box. The brush heads are arranged in one-to-one correspondence with the pipe fittings and can brush the inner walls of the pipe fittings. A power storage device and a recovery device are installed in the liquid inlet cavity. The recovery device is connected to the brush head, and the recovery device can retract the brush head extending into the pipe fittings into the liquid inlet cavity. The power storage device can hold the brush head or push the brush head into the pipe fittings.

[0008] The utility model is further configured as: The brush head includes a plug head. The outer wall of the plug head can fit with the inner wall of the pipe fitting. A convex platform is arranged on the side of the plug head facing the pipe fitting. The diameter of the convex platform is smaller than that of the plug head. A guiding rod is arranged on the side of the convex platform facing the pipe fitting. A brush is arranged around the guiding rod near the convex platform. The guiding rod is an elastic metal. When the brush head is in the liquid inlet cavity, the guiding rod always extends into the pipe fitting.

[0009] The utility model is further configured as follows: two liquid inlet holes are symmetrically provided on the plug along the axial direction, the liquid inlet holes extend into the boss and are respectively connected to a spray groove, the end openings of the spray grooves are provided on the outer wall of the boss, the spray grooves are involute-shaped, and the two spray grooves extend in the same direction.

[0010] The utility model is further configured as follows: a mounting plate is fixed in the liquid inlet cavity, a plurality of slide grooves are opened on the mounting plate along the axial direction of the pipe fitting, the force storage device includes a plurality of clamping blocks, each of the brush heads has two symmetrical clamping blocks, the clamping blocks are wedge-shaped, the inclined surface of the wedge faces the direction of the pipe fitting, the side of the clamping block away from the pipe fitting can be engaged with the plug, the side of the clamping block away from the pipe fitting is connected with a lever, the corresponding levers on the same side of the brush heads in the same row are commonly connected with a connecting rod, the corresponding connecting rods on the left side of all the brush heads are commonly connected with a plurality of left push rods, the corresponding connecting rods on the right side of all the brush heads are commonly connected with a plurality of right push rods, the left push rod and the right push rod both extend out of the liquid separation box, a plurality of force storage springs are installed on the mounting plate, and when the plug is engaged with the clamping block, the plug compresses the force storage spring accordingly.

[0011] The utility model is further configured as follows: one end of the left push rod and the right push rod extending out of the liquid separation box is connected to a handle, and a return spring is arranged between the handle and the outer box wall of the liquid separation box.

[0012] The utility model is further configured as follows: the recovery device includes a plurality of winding rods, each row of the pipe fittings corresponds to a winding rod, a plurality of partition rings are fixed on the winding rod at intervals, a traction rope is wound between two adjacent partition rings, the other end of the traction rope is fixed on the brush head, one end of the winding rod extends out of the liquid separation box, and the end of the winding rod extending out of the liquid separation box is installed with a linkage gear, adjacent linkage gears are meshed with each other, and a motor is installed on one of the winding rods.

[0013] The advantages of the utility model are:

[0014] 1. A brush head is arranged in the liquid inlet cavity corresponding to each pipe fitting, and the bristles are arranged at one end of the brush head facing the pipe fitting, and the other end of the brush head can be clamped with the force storage device and connected with a recovery device. When the motor of the recovery device drives the winding rod to rotate, the traction rope is wound up and drives the brush head to move to one side of the winding rod until the brush head abuts against the force storage device. At this time, the recovery device stops, and the brush head is clamped by the clamping block of the force storage device. At the same time, the force storage spring is compressed and force is stored by the brush head. When the handles on both sides are pushed to open the clamping block, the brush head is bounced into the pipe fitting under the action of the force storage spring, and then pushed to the other side by the high-pressure liquid in the liquid inlet cavity, so as to achieve the cleaning of the inner wall of the pipe fitting;

[0015] 2. A boss is provided between the plug and the brush bristles. Two spraying grooves are formed in the boss. The spraying grooves are in the shape of involute curves. The two spraying grooves are arranged in the same direction. When the high-pressure liquid pushes the brush head to move along the inner wall of the pipe fitting through the plug, part of the liquid enters the spraying grooves through the liquid inlet holes and is sprayed out after changing the direction by the spraying grooves. The sprayed liquid forms a certain angle with the radial direction of the brush head, so as to keep the brush head rotating when it moves along the inner wall of the pipe fitting, improving the cleaning effect of the brush head. Description of the Drawings

[0016] Figure 1 Schematic structural diagram of an embodiment of the present invention;

[0017] Figure 2 Along Figure 1 Sectional view taken along line A-A shown in;

[0018] Figure 3 Along Figure 1 Sectional view taken along line B-B shown in;

[0019] Figure 4 For Figure 2 Enlarged view of part C shown in;

[0020] Figure 5 Schematic structural diagram of the brush head of the present invention;

[0021] Figure 6 Along Figure 5 Sectional view taken along line D-D shown in;

[0022] In the figure: 1, tank body; 2, liquid separation box; 21, liquid inlet chamber; 23, mounting plate; 231, chute; 3, pipe fitting; 4, brush head; 41, plug; 42, boss; 43, guide rod; 44, brush bristles; 45, liquid inlet hole; 46, spraying groove; 5, energy storage device; 51, fixture block; 52, lever; 53, left push rod; 54, right push rod; 55, connecting rod; 56, handle; 57, return spring; 58, energy storage spring; 6, recovery device; 61, motor; 62, linkage gear; 63, winding rod; 64, partition ring; 65, towing rope. Detailed Embodiment

[0023] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0024] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0025] In the present utility model, unless otherwise specified, the orientations such as "upper" and "lower" generally refer to the directions shown in the drawings, or to the vertical, perpendicular or gravitational directions; similarly, for the convenience of understanding and description, "left" and "right" generally refer to the left and right shown in the drawings; "inner" and "outer" refer to the inner and outer of the contours of the respective components themselves, but the above orientation terms are not used to limit the present utility model.

[0026] Please refer to Figures 1-6 , the present utility model provides the following technical solutions:

[0027] A heat exchanger that is convenient for cleaning, including a tank body 1, a liquid distribution box 2 is installed at the opening of the tank body 1, pipe fittings 3 are jointly installed in the liquid distribution box 2 and the tank body 1, a brush head 4 is arranged in the liquid inlet chamber 21 of the liquid distribution box 2, the brush heads 4 are arranged in one-to-one correspondence with the pipe fittings 3, and when the brush head 4 moves on the inner wall of the pipe fitting 3, the inner wall of the pipe fitting 3 can be brushed and cleaned;

[0028] A power storage device 5 and a recovery device 6 are installed in the liquid inlet chamber 21, the recovery device 6 is connected to the brush head 4, the recovery device 6 can retract the brush head 4 extending into the pipe fitting 3 into the liquid inlet chamber 21, the power storage device 5 can hold the brush head 4 or push the brush head 4 into the pipe fitting 3. When the heat exchanger is working normally, the brush head 4 is held by the power storage device 5, and the power storage device 5 stores energy. When it is necessary to clean the inner wall of the pipe fitting 3, control the power storage device 5 to release the brush head 4, and the brush head 4 is ejected into the pipe fitting 3 by the power storage device 5. Then, high-pressure liquid is introduced into the liquid inlet chamber 21, and the hydraulic pressure pushes the brush head 4 to move along the inner wall of the pipe fitting 3 while cleaning. When the brush head 4 moves to the other end of the pipe fitting 3, stop introducing high-pressure liquid, start the recovery device 6, and pull the brush head 4 back into the liquid inlet chamber 21 until the brush head 4 is held by the power storage device 5. To ensure the cleaning effect, the above operations can be repeated until the cleaning target is achieved.

[0029] The brush head 4 includes a plug 41, the outer wall of the plug 41 can fit with the inner wall of the pipe fitting 3. When the brush head 4 is inside the pipe fitting 3, by introducing high-pressure liquid, the brush head 4 can be pushed to move along the inner wall of the pipe fitting 3 through the plug 41, so as to achieve cleaning. A convex platform 42 is arranged on the side of the plug 41 facing the pipe fitting 3, the diameter of the convex platform 42 is smaller than that of the plug 41, a guide rod 43 is arranged on the side of the convex platform 42 facing the pipe fitting 3, and bristles 44 are arranged around the side of the guide rod 43 close to the convex platform 42. The guide rod 43 is made of elastic metal and is convenient for moving at the bending part inside the pipe fitting 3. When the brush head 4 is in the liquid inlet chamber 21, the guide rod 43 always extends into the pipe fitting 3, which can ensure that when the power storage device 5 ejects, the brush head 4 can enter the pipe fitting 3 along the guide rod 43. The opening of the pipe fitting 3 on the side of the liquid inlet chamber 21 can be set in a flared shape to facilitate the entry of the brush head 4. A snap ring can be arranged at the opening of the other side of the pipe fitting 3, and the snap ring is engaged with the plug 41 to prevent the brush head 4 from flying out from the other end of the pipe fitting 3 and affecting the recovery of the brush head 4.

[0030] A mounting plate 23 is fixed in the liquid inlet chamber 21, and a plurality of slide grooves 231 are provided on the mounting plate 23 along the axial direction of the pipe fitting 3. The force storage device 5 includes a plurality of blocks 51, and each brush head 4 has two symmetrical blocks 51. The blocks 51 are wedge-shaped, and the inclined surface of the wedge faces the direction of the pipe fitting 3. The side of the block 51 away from the pipe fitting 3 can be engaged with the plug 41, and the side of the block 51 away from the pipe fitting 3 is connected with a lever 52. When the plug 41 moves from the pipe fitting 3 to the mounting plate 23, the lever 52 can be pushed away by the wedge surface until it abuts against the mounting plate 23. When the plug 41 moves from the mounting plate 23 to the pipe fitting 3, it will be stuck by the blocks 51, and the lever 52 is required to separate the blocks 51 on both sides from the plug 41 before it can move.

[0031] The corresponding levers 52 on the same side of the same row of brush heads 4 are commonly connected with a connecting rod 55, the corresponding connecting rods 55 on the left side of all brush heads 4 are commonly connected with a plurality of left push rods 53, and the corresponding connecting rods 55 on the right side of all brush heads 4 are commonly connected with a plurality of right push rods 54. The left push rods 53 and the right push rods 54 are both extended out of the liquid separation box 2, and one end of the left push rods 53 and the right push rods 54 extending out of the liquid separation box 2 is connected with a handle 56, and a return spring 57 is arranged between the handle 56 and the outer box wall of the liquid separation box 2. Under normal conditions, the handle 56 is tightened outwards under the action of the return spring 57, so that all the levers 52 move toward the corresponding brush head 4 side, and the block 51 clamps the plug 41 from both sides to prevent interference with the normal operation of the heat exchanger;

[0032] A plurality of force storage springs 58 are installed on the mounting plate 23 . When the plug 41 is engaged with the block 51 , the plug 41 compresses the force storage springs 58 . When the block 51 is released, the force storage springs 58 can push the brush head 4 to eject into the pipe 3 .

[0033] The recovery device 6 includes a plurality of winding rods 63, each row of pipe fittings 3 corresponds to a winding rod 63, a plurality of separation rings 64 are fixed on the winding rod 63 at intervals, a traction rope 65 is wound between two adjacent separation rings 64, the other end of the traction rope 65 is fixed on the brush head 4, one end of the winding rod 63 extends out of the liquid separation box 2, and one end of the winding rod 63 extending out of the liquid separation box 2 is installed with a linkage gear 62, and adjacent linkage gears 62 are meshed with each other, and a motor 61 is installed on one of the winding rods 63. When the motor 61 is working, all the winding rods 63 are driven to rotate synchronously through the linkage gear 62. The rotation directions of the winding rods 62 are inconsistent, and the winding directions of the traction ropes 65 wound thereon are also inconsistent. When the traction rope 65 is wound, it drives the brush head 4 to move on the inner wall of the pipe fitting 3 until the brush head 4 enters the liquid inlet chamber 21 and stops abutting against the mounting plate 23, thereby realizing the recovery of the brush head 4 and facilitating repeated cleaning;

[0034] A bearing is provided between the winding rod 63 and the liquid separation box 2 to reduce the influence of the resistance of the winding rod 63 itself on the movement of the brush head 4.

[0035] Two liquid inlet holes 45 are symmetrically arranged along the axis on the upper edge of the plug 41. The liquid inlet holes 45 extend into the boss 42 and are respectively communicated with a spray groove 46. The end openings of the spray grooves 46 are arranged on the outer wall of the boss 42. The spray grooves 46 are in the shape of an involute. The two spray grooves 46 extend in the same direction. The spraying direction of the liquid at the end opening of the spray groove 46 forms a certain angle with the radius of the boss 42 at this point, so that the liquid can push the boss 42 to rotate when spraying, that is, the brush head 4 can maintain rotation while moving along the inner wall of the pipe fitting 3, improving the cleaning effect of the bristles 44 on the inner wall.

[0036] The working principle of the present application is as follows:

[0037] When the heat exchanger is working normally, the brush head 4 is in contact with the mounting plate 23, and the corresponding two clamping blocks 51 clamp the plug 41 from both sides. At this time, the energy storage spring 58 is compressed and stores energy;

[0038] When it is necessary to clean the inner wall of the pipe fitting 3, push the handles 56 on both sides, so that all the lever rods 52 move towards the side away from the corresponding brush head 4, the clamping blocks 51 release the plug 41, and the energy storage spring 58 resets and pushes the brush head 4 to eject into the pipe fitting 3;

[0039] Then, introduce high-pressure liquid into the liquid inlet cavity 21. The liquid pushes the brush head 4 to move along the inner wall of the pipe fitting 3 through the plug 41, and the brush head 4 brushes the inner wall of the pipe fitting 3;

[0040] Part of the liquid enters the spray groove 46 through the liquid inlet hole, and the liquid ejected through the spray groove 46 pushes the boss 42 to rotate, so that the brush head 4 maintains rotation while moving along the inner wall of the pipe fitting 3;

[0041] When the brush head 4 moves to the other end of the pipe fitting 3, the hydraulic pressure in the liquid inlet cavity 21 rises rapidly. At this time, stop introducing the liquid, start the motor 61, the winding rod 63 winds the traction rope 65, and the traction rope 65 drives the brush head 4 to return to the liquid inlet cavity 21 until it is in contact with the mounting plate 23, and the clamping block 51 clamps the plug 41 to complete a cleaning;

[0042] If the cleaning does not meet the expectations, the above operations can be repeated.

[0043] In summary, in the liquid inlet chamber 21, a brush head 4 is provided corresponding to each pipe fitting 3. The bristles 44 are arranged at one end of the brush head 4 facing the pipe fitting 3. The other end of the brush head 4 can be clamped with the energy storage device 5 and is connected to a recovery device 6. When the motor 61 of the recovery device 6 drives the winding rod 63 to rotate, the traction rope 64 is wound, driving the brush head 4 to move towards the side of the winding rod 63 until the brush head 4 abuts against the energy storage device 5. At this time, the recovery device 6 stops, and the brush head 4 is clamped by the clamping block 51 of the energy storage device 5. At the same time, the energy storage spring 58 is compressed and stored energy by the brush head 4. When the two side handles 56 are pushed to open the clamping block 51, the brush head 4 is ejected into the pipe fitting 3 under the action of the energy storage spring 58 and then is pushed to the other side by the high-pressure liquid in the liquid inlet chamber 21, so as to realize the cleaning of the inner wall of the pipe fitting 3;

[0044] A boss 42 is arranged between the plug 41 and the bristles 44. Two injection grooves 46 are formed in the boss 42. The injection grooves 46 are in the shape of an involute. The two injection grooves 46 are arranged in the same direction. When the high-pressure liquid pushes the brush head 44 to move on the inner wall of the pipe fitting 3 through the plug 41, part of the liquid enters the injection grooves 46 through the liquid inlet holes 45 and is ejected after changing the direction by the injection grooves 46. The ejected liquid forms a certain angle with the radial direction of the brush head 4, so as to drive the brush head 4 to rotate when moving on the inner wall of the pipe fitting 3, improving the cleaning effect of the brush head 4.

[0045] Obviously, the above-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.

[0046] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0047] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above drawings are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0048] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A heat exchanger convenient for cleaning, comprising a tank body (1), a liquid separation box (2) is installed at the opening of the tank body (1), and pipe fittings (3) are jointly installed in the liquid separation box (2) and the tank body (1), characterized in that: A brush head (4) is arranged in the liquid inlet cavity (21) of the liquid separation box (2); the brush head (4) is arranged in a one-to-one correspondence with the pipe fitting (3) and can scrub the inner wall of the pipe fitting (3); a force storage device (5) and a recovery device (6) are installed in the liquid inlet cavity (21); the recovery device (6) is connected to the brush head (4); the recovery device (6) can retract the brush head (4) extending into the pipe fitting (3) into the liquid inlet cavity (21); and the force storage device (5) can clamp the brush head (4) or push the brush head (4) into the pipe fitting (3).

2. The heat exchanger according to claim 1, which is easy to clean, is characterized in that: The brush head (4) comprises a plug (41), the outer wall of which can be fitted with the inner wall of the pipe (3), a boss (42) is arranged on the side of the plug (41) facing the pipe (3), the diameter of the boss (42) is smaller than the diameter of the plug (41), a guide rod (43) is arranged on the side of the boss (42) facing the pipe (3), bristles (44) are arranged on the side of the guide rod (43) close to the boss (42), the guide rod (43) is made of elastic metal, and when the brush head (4) is in the liquid inlet chamber (21), the guide rod (43) always extends into the pipe (3).

3. The heat exchanger according to claim 2, characterized in that: The plug (41) is provided with two liquid inlet holes (45) symmetrically arranged along the axial direction. The liquid inlet holes (45) extend into the boss (42) and are respectively connected to a spraying groove (46). The end openings of the spraying grooves (46) are arranged on the outer wall of the boss (42). The spraying grooves (46) are involute-shaped. The two spraying grooves (46) extend in the same direction.

4. The heat exchanger convenient for cleaning according to claim 2, wherein: A mounting plate (23) is fixed in the liquid inlet cavity (21), and a plurality of slide grooves (231) are provided on the mounting plate (23) along the axial direction of the pipe (3). The force storage device (5) comprises a plurality of clamping blocks (51), and each of the brush heads (4) has two symmetrical clamping blocks (51). The clamping blocks (51) are wedge-shaped, and the inclined surface of the wedge faces the direction of the pipe (3). The side of the clamping block (51) facing away from the pipe (3) can be engaged with the plug (41). The side of the clamping block (51) facing away from the pipe (3) is connected to a lever (52). The brush heads in the same row are connected to the clamping block (51). (4) The corresponding levers (52) on the same side are commonly connected with a connecting rod (55), the corresponding connecting rods (55) on the left side of all the brush heads (4) are commonly connected with a plurality of left push rods (53), and the corresponding connecting rods (55) on the right side of all the brush heads (4) are commonly connected with a plurality of right push rods (54), the left push rods (53) and the right push rods (54) both extend out of the liquid separation box (2), and a plurality of force storage springs (58) are installed on the mounting plate (23), and when the plug (41) is engaged with the clamping block (51), the plug (41) correspondingly compresses the force storage spring (58).

5. The heat exchanger according to claim 4, characterized in that: One end of the left push rod (53) and the right push rod (54) extending out of the liquid separation box (2) are both connected to a handle (56), and a return spring (57) is arranged between the handle (56) and the outer box wall of the liquid separation box (2).

6. The heat exchanger according to claim 1, which is easy to clean, is characterized in that: The recycling device (6) includes a plurality of winding rods (63). Each row of the pipe fittings (3) corresponds to one winding rod (63) in common. A plurality of separating rings (64) are fixedly arranged on the winding rod (63) at intervals. A traction rope (65) is wound between two adjacent separating rings (64). The other end of the traction rope (65) is fixed to the brush head (4). One end of the winding rod (63) extends out of the liquid separation tank (2). A linkage gear (62) is installed at the end of the winding rod (63) that extends out of the liquid separation tank (2). Adjacent linkage gears (62) are meshed with each other. A motor (61) is installed on one of the winding rods (63).

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