Finned tube heat exchanger

Abstract

The utility model relates to the technical field of heat exchangers, and discloses a finned tube heat exchanger which comprises an exchange box, a plurality of base tubes are fixedly connected to the inner wall of the exchange box, a plurality of fin assemblies are arranged on the outer walls of the base tubes, and each fin assembly comprises an upper fin and a lower fin. The outer wall of one side of the upper fin and the outer wall of one side of the lower fin are each fixedly connected with a connecting block, the interiors of the connecting blocks are each fixedly connected with a connecting rod, the outer walls of the connecting rods are each provided with a connecting base, the side walls of the upper fin and the lower fin are each provided with a groove, and a locking assembly is arranged between the upper fin and the lower fin. According to the utility model, a worker pulls the grooves of the upper fin and the lower fin to rotate relatively, the convex blocks move downwards to extrude the limiting beads to retract and release the limiting beads from the fixed blocks to unlock the fins, and the fins can be taken down to be cleaned and maintained, so that the effect of quickly disassembling the fins is achieved, and the problems that the traditional fins are difficult to maintain and tedious to disassemble are solved; the cleaning efficiency is improved; and the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchanger technical field especially relates to a finned tube heat exchanger. BACKGROUND

[0002] The finned tube heat exchanger is a kind of high-efficiency heat exchange equipment widely used in air conditioning, refrigeration, chemical industry, electric power and other fields, which expands heat transfer area by increasing fin on the surface of base pipe, so as to improve heat exchange efficiency, and the main function of the finned tube heat exchanger is to realize the heat transfer between cold and hot fluids, and its performance directly affects the energy efficiency and operating stability of the whole system, with the continuous development of industrial technology, higher requirements are put forward for the efficiency, reliability and maintenance convenience of heat exchanger, however, the traditional finned tube heat exchanger still has many deficiencies in structure design and maintenance, which limits its further promotion and optimization in practical application.

[0003] In the prior art, the finned tube heat exchanger is usually composed of base pipe, fin, shell and fluid inlet and outlet, the fin is fixed on the surface of base pipe by welding, extrusion or mechanical processing to increase heat transfer area, cold and hot fluids flow through the channels inside base pipe and outside fin respectively, and heat is transferred through base pipe wall and fin, in order to improve heat transfer efficiency, the prior art usually adopts methods such as increasing fin density, optimizing fluid channel design or using high thermal conductivity materials, in addition, fluid inlet and outlet are usually fixed with heat exchanger by threaded connection, flange connection or welding to ensure sealing and stability.

[0004] However, the existing finned tube heat exchanger has significant problems in maintenance and installation, the connection mode of traditional fin and base pipe is mostly fixed design, and special tools or complex operation are needed when disassembling and cleaning the fin, which leads to cumbersome maintenance process and time-consuming, in addition, the connection mode of fluid inlet and outlet is mostly threaded or flange connection, which needs to be adjusted and fastened for many times during installation, not only the operation is complex, but also loose or leakage problems are easy to occur, which affects the sealing and operating stability of the equipment, these problems not only increase the maintenance cost, but also reduce the use efficiency of the equipment, therefore, a finned tube heat exchanger is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides a finned tube heat exchanger, which aims at improving the problems of difficult fin maintenance and cumbersome disassembly in the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A finned tube heat exchanger, comprising an exchange box, a plurality of base pipes fixedly connected to the inner wall of the exchange box, the base pipes being distributed in an array, a plurality of fin assemblies provided on the outer wall of the base pipes and distributed in an array, the fin assemblies being used to increase the heat transfer area;

[0008] The fin assembly comprises upper fins and lower fins, the outer walls of the upper fins and the lower fins are slidably connected to the outer wall of the base pipe, one side of the outer wall of each of the upper fins and the lower fins is fixedly connected with a connecting block, the inner part of the connecting block is fixedly connected with a connecting rod, the outer wall of the connecting rod is provided with a connecting seat, the outer wall of the connecting rod is rotatably connected to the inner part of the connecting seat, the side wall of each of the upper fins and the lower fins is provided with a groove, and a locking assembly is arranged between the upper fins and the lower fins, the locking assembly being used to connect the upper fins and the lower fins.

[0009] Further description of the above technical scheme:

[0010] The locking assembly comprises a fixed block, the outer wall of the fixed block is fixedly connected to the inner part of the upper fin, the inner wall of the fixed block is slidably connected with limiting beads on the left and right sides, the side wall of each of the limiting beads is provided with a limiting spring, one end of each of the limiting springs is fixedly connected to the inner wall of the fixed block, and the other end of each of the limiting springs is fixedly connected to the outer wall of the limiting bead, and the top of the lower fin is fixedly connected with a protruding block.

[0011] Further description of the above technical scheme:

[0012] The base pipe is provided with a connecting assembly at both ends, the connecting assembly comprises a connecting pipe, and the connecting pipe is fixedly connected to the outer wall of the base pipe at both ends.

[0013] Further description of the above technical scheme:

[0014] The outer wall of the exchange box is provided with heat supply pipes on the left and right sides, and the outer wall of the heat supply pipes is fixedly connected to the inner part of the exchange box.

[0015] Further description of the above technical scheme:

[0016] The outer wall of the exchange box is provided with a plurality of fixed seats, the fixed seats are distributed on the two sides of the outer wall of the exchange box, the side wall of each of the fixed seats is fixedly connected to the outer wall of the exchange box, and the inner part of each of the fixed seats is communicated with the inner part of the connecting pipe.

[0017] Further description of the above technical scheme:

[0018] The inner part of the fixed seat is slidably connected with a plurality of rolling beads, the rolling beads are distributed in a circumferential shape in the inner part of the fixed seat, and the outer wall of the fixed seat is provided with a movable sliding ring, and the movable sliding ring is slidably connected to the outer wall of the fixed seat.

[0019] As a further description of the above technical solutions:

[0020] The inner wall of the fixing seat is fixedly connected with a limiting block, the outer wall of the fixing seat is sleeved with a reset spring, one end of the reset spring is fixedly connected to the side wall of the fixing seat, and the other end of the reset spring is fixedly connected to the side wall of the limiting block.

[0021] As a further description of the above technical solutions:

[0022] The inner wall of the fixing seat is fixedly connected with a limiting block, the outer wall of the fixing seat is sleeved with a reset spring, one end of the reset spring is fixedly connected to the side wall of the fixing seat, and the other end of the reset spring is fixedly connected to the side wall of the limiting block.

[0023] The utility model has the following beneficial effects:

[0024] 1、 the utility model discloses, the staff makes its relative rotation through pulling up and down fin recess, and the convex block moves down and extrudes the limiting bead retraction, and the locking is released after separating the fixed block, and the fin can be taken down and is maintained to clean, reaches the quick disassembly effect of fin, has solved the traditional fin maintenance difficult, the problem of disassembly complicated, has improved the cleaning efficiency and has reduced the maintenance cost.

[0025] 2、 the utility model discloses, the staff slides the movable sliding ring upwards, drives the limiting block and moves up and compresses the reset spring, makes the limiting block no longer extrude the ball bearing, and the ball bearing slides into the movable sliding ring inside, then, the inner tube of the inlet and outlet pipe is inserted into the inner wall of the fixing seat, and the movable sliding ring is loosened, and the limiting block is reset by the reset spring, and the ball bearing slides into the limiting slot of the outer wall of the inner tube and is fixed by the limiting block, reaches the effect of quick and stable pipeline connection, has solved the traditional connection mode operation complicated, the problem of easy loosening, has improved installation efficiency and sealing property. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 A perspective view of a finned tube heat exchanger is provided for the utility model;

[0027] Figure 2 A base pipe structure schematic view of a finned tube heat exchanger is provided for the utility model;

[0028] Figure 3 An upper fin structure schematic view of a finned tube heat exchanger is provided for the utility model;

[0029] Figure 4 For Figure 2 An enlarged view of A in the middle.

[0030] LEGEND:

[0031] 1, exchange box; 2, heat supply pipe; 3, inlet and outlet pipe; 4, connecting pipe; 5, base pipe; 6, upper fin; 7, lower fin; 8, connecting rod; 9, connecting seat; 10, connecting block; 11, groove; 12, convex block; 13, fixed block; 14, limiting spring; 15, limiting bead; 16, fixed seat; 17, return spring; 18, ball; 19, movable sliding ring; 20, limiting block; 21, inner pipe; 22, limiting groove. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0033] Referring to Figure 1 Figure 3 An embodiment provided by the utility model: a finned tube heat exchanger, comprising an exchange box 1, the exchange box 1 is made of carbon steel material, can bear the pressure and temperature change in the heat exchange process, its function is to provide a sealed space for the whole heat exchanger, prevent heat loss and the invasion of foreign impurities, the inner wall of exchange box 1 is fixedly connected with multiple base pipes 5 in the mode of support, the base pipe 5 is made of copper pipe, has excellent heat conductivity, can quickly transfer heat, is the key heat conduction component in the heat exchange process, is responsible for transferring the heat of one side to the other side, realizes the basic function of heat exchange, the base pipe 5 is arrayed, the outer wall of base pipe 5 is provided with multiple fin assemblies, the fin assemblies are arrayed on the outer wall of base pipe 5, and the fin assemblies are used to increase the heat transfer area;

[0034] ​The fin assembly comprises upper fins 6 and lower fins 7, which are made of aluminum alloy material, have the characteristics of small density, good heat conductivity and relatively low cost, reduce the weight of the entire heat exchanger while ensuring good heat dissipation performance, and are slidingly connected to the outer wall of the base pipe 5. The outer wall of the upper fin 6 and the lower fin 7 is fixedly connected with a connecting block 10, which is made of the same aluminum alloy material as the fin, and its function is to connect the fin and the connecting rod 8 to ensure stable connection between the two. The connecting rod 8 is fixedly connected inside the connecting block 10 for connecting the upper fin 6 and the lower fin 7 and providing a support shaft for their relative rotation. The outer wall of the connecting rod 8 is provided with a connecting seat 9, and the outer wall of the connecting rod 8 is rotatably connected inside the connecting seat 9. The side wall of the upper fin 6 and the lower fin 7 is provided with a groove 11, which facilitates the work of the staff and facilitates the disassembly and installation operation of the fin. The locking assembly is arranged between the upper fin 6 and the lower fin 7, and the locking assembly is used to connect the upper fin 6 and the lower fin 7. The locking assembly comprises a fixed block 13 for fixing a limiting bead 15 and a limiting spring 14. The outer wall of the fixed block 13 is fixedly connected to the inside of the upper fin 6. The limiting bead 15 is slidingly connected to the inner wall of the fixed block 13. The limiting bead 15 is made of steel ball and has good wear resistance and hardness. Its function is to cooperate with the protruding block 12 on the lower fin 7 to realize the locking of the upper fin 6 and the lower fin 7. The limiting spring 14 is made of spring steel and can push the limiting bead 15 out when there is no external force, so that it is clamped into the protruding block 12 of the lower fin 7 to play a locking role. Under the action of external force, the limiting spring 14 can be compressed and deformed to make the limiting bead 15 retract and unlock. One end of the limiting spring 14 is fixedly connected to the inner wall of the fixed block 13, and the other end of the limiting spring 14 is fixedly connected to the outer wall of the limiting bead 15. The protruding block 12 is fixedly connected to the top of the lower fin 7. The protruding block 12 is made of the same aluminum alloy material as the lower fin 7. Its function is to cooperate with the limiting bead 15 to realize the locking and unlocking of the upper fin 6 and the lower fin 7. The base pipe 5 is provided with a connecting assembly at both ends. The connecting assembly comprises a connecting pipe 4, which is used to connect the base pipe 5 and the external pipeline to realize the input and output of heat. The connecting pipe 4 is fixedly connected to the outer wall of the base pipe 5. The outer wall of the heat supply pipe 2 is fixedly connected to the inside of the exchange box 1;

[0035] Specifically, in the use of the finned tube heat exchanger, first, the heating pipe 2 is connected with the external hot water source, the hot water is delivered to the inside of the exchange box 1 by the heating pipe 2, at the same time, one end of the inlet and outlet pipe 3 is connected with the external cold water source, the cold water is injected into the inside of the connecting pipe 4, the cold water flows into the base pipe 5 through the connecting pipe 4, in the base pipe 5, the cold water exchanges heat with the base pipe 5 and the upper fin 6 and the lower fin 7 of the outer wall of the base pipe 5, the heat is transferred from the hot water to the cold water, the heat exchange process is realized, the water after the heat exchange flows out from the other end of the inlet and outlet pipe 3, the whole heat exchange process is completed, when the equipment needs to be maintained daily, the staff first finds the groove 11 on the surface of the upper fin 6 and the lower fin 7, holds the upper fin 6 and the lower fin 7 with both hands at the same time, and applies pulling force in the opposite upward and downward directions, under the action of the upward pulling force on the upper fin 6, the upper fin 6 rotates relatively along the clockwise direction with the connecting seat 9 as the center, the lower fin 7 rotates relatively along the counterclockwise direction with the connecting seat 9 as the center under the action of the downward pulling force, at this time, the protruding block 12 at the top of the lower fin 7 displaces vertically downward under the action of the downward pulling force, the fixed block 13 at the bottom of the upper fin 6 displaces vertically upward under the action of the upward pulling force, in the displacement process of the protruding block 12, the outer wall gradually approaches and extrudes the limiting beads 15 on both sides, after the limiting beads 15 are extruded, the limiting beads 15 retract into the inside of the fixed block 13 along the sliding groove in the inner wall of the fixed block 13 and compress the limiting spring 14, when the protruding block 12 continues to displace downward and completely separates from the inside of the fixed block 13, the limiting beads 15 lose the extrusion of the protruding block 12, the limiting spring 14 is in the compressed state at this time, so that the locking relationship between the upper fin 6 and the lower fin 7 is released, the staff can easily take the upper fin 6 and the lower fin 7 from the base pipe 5 and clean and maintain them, so that the fins are easy to disassemble and maintain, and the cleaning and maintenance cost is reduced.

[0036] With reference to Figure 4The outer wall of the exchange box 1 is provided with a plurality of fixing seats 16 made of stainless steel, which are internally provided with pipelines communicated with the connecting pipe 4, and serve to provide a connecting base for the connecting pipe 4 and the external inlet and outlet pipe 3. The fixing seats 16 are distributed on both sides of the outer wall of the exchange box 1, and the side walls of the fixing seats 16 are fixedly connected to the outer wall of the exchange box 1. The interiors of the fixing seats 16 are communicated with the interiors of the connecting pipe 4, so that the fluid can flow smoothly therebetween. A plurality of ball bearings 18 are slidingly connected to the interiors of the fixing seats 16, which serve to cooperate with the limiting grooves 22 of the outer wall of the inner pipe 21 when the inlet and outlet pipe 3 is connected, so as to realize quick positioning and fixing, and ensure the stability of the connection. The ball bearings 18 are circumferentially distributed in the interiors of the fixing seats 16. The outer wall of the fixing seat 16 is provided with a movable sliding ring 19 made of engineering plastic, which is used to control the position of the ball bearings 18 by sliding up and down, so as to realize the connection and disconnection of the inlet and outlet pipe 3. The movable sliding ring 19 is slidingly connected to the outer wall of the fixing seat 16. The inner wall of the fixing seat 16 is fixedly connected with a limiting block 20, which is used to limit the position of the ball bearings 18, so as to prevent the ball bearings 18 from rolling randomly and affecting the connection effect. The outer wall of the fixing seat 16 is sleeved with a reset spring 17, which serves to provide a reset force after the movable sliding ring 19 is slid upward, so as to restore the limiting block 20 to the original position, and realize the re-limiting of the ball bearings 18. One end of the reset spring 17 is fixedly connected to the side wall of the fixing seat 16, and the other end of the reset spring 17 is fixedly connected to the side wall of the limiting block 20. The inner wall of the fixing seat 16 is slidingly connected with an inner pipe 21, and the side wall of the inner pipe 21 is fixedly connected with the inlet and outlet pipe 3, which is used for the input and output of cold and hot fluid. The outer wall of the inner pipe 21 is provided with a limiting groove 22, which realizes the quick positioning and fixing of the inlet and outlet pipe 3 and the fixing seat 16.

[0037] Specifically, first need to connect the inlet and outlet pipe 3 of the cold and hot fluid with the fixed seat 16 of the heat exchanger, the staff hold the movable sliding ring 19, along the fixed seat 16 outer wall vertically upward sliding force movable sliding ring 19, movable sliding ring 19 upward sliding drive limit block 20 along the fixed seat 16 inner wall vertically upward sliding, in the process of limit block 20 upward sliding, it produces pressure on the return spring 17, make the return spring 17 compression, elastic deformation, with the limit block 20 upward, the ball 18 originally extruded by the limit block 20 in the fixed seat 16 inner wall specific location lost extrusion force, sliding to the inside of movable sliding ring 19, at this time, the staff will inlet and outlet pipe 3 side wall inner tube 21, along the fixed seat 16 inner wall center axis direction, insert into the fixed seat 16 inner wall, when the inner tube 21 inserted in place, the staff release movable sliding ring 19. At this time, the return spring 17 in the compression state begins to release the elastic potential energy, under the reset push of return spring 17, limit block 20 along the fixed seat 16 inner wall vertically down to the original position, with the limit block 20 downward, the ball 18 originally located in the inside of movable sliding ring 19, under the push of limit block 20, from the inside of movable sliding ring 19 along the fixed seat 16 inner wall circumference direction sliding to the outer wall of inner tube 21 limit groove 22 inside, limit block 20 limit the position of the ball 18, prevent it from coming out of the limit groove 22, so as to complete the connection of inlet and outlet pipe 3, so as to achieve the effect of quick and stable connection of the inlet and outlet pipe of cold and hot fluid.

[0038] Working principle: when using the finned tube heat exchanger, first need to connect the inlet and outlet pipe 3 of cold and hot fluid with the fixed seat 16 of heat exchanger, first the staff slides the movable sliding ring 19 upwards, the movable sliding ring 19 drives the limiting block 20 to slide upwards, and makes the return spring 17 force compression, the upward movement of the limiting block 20 makes its side wall no longer extrude the ball 18, the ball 18 loses extrusion and slides to the inside of the movable sliding ring 19, then the staff inserts the inner tube 21 of the side wall of inlet and outlet pipe 3 into the inner wall of fixed seat 16, at this time the staff releases the movable sliding ring 19, the limiting block 20 restores to the original position under the reset push of the return spring 17, makes the ball 18 slide from the inside of the movable sliding ring 19 to the inside of the limiting groove 22 of the outer wall of inner tube 21, and then limits its position by the limiting block 20, so as to complete the connection of inlet and outlet pipe 3, so as to achieve the effect of quickly and stably connecting the inlet and outlet pipe of cold and hot fluid, after the connection is completed, the heat supply pipe 2 injects hot water into the inside of the exchange box 1, then the inlet and outlet pipe 3 at one end injects cold water into the inside of the connecting pipe 4, and then flows into the base pipe 5, after heat exchange by the base pipe 5 and the upper fin 6 and the lower fin 7, the other end inlet and outlet pipe 3 flows out, when the equipment needs to be maintained daily, the staff can exert pulling force to the upper fin 6 and the lower fin 7 in the upward and downward directions through the groove 11 on the surface of the upper fin 6 and the lower fin 7, under the action of the pulling force, the upper fin 6 and the lower fin 7 rotate relatively with the connecting seat 9 as the center, at this time, the protruding block 12 at the top of the lower fin 7 displaces downward under the action of the pulling force, the fixed block 13 at the bottom of the upper fin 6 displaces upward under the action of the pulling force, under the action of the displacement of the protruding block 12, the outer wall of the protruding block 12 extrudes the limiting beads 15 on its two sides, so that the limiting beads 15 retract and compress the limiting spring 14, when the protruding block 12 completely separates from the inside of the fixed block 13, the locking relationship between the upper fin 6 and the lower fin 7 is released, so that the upper fin 6 and the lower fin 7 can be taken off and cleaned and maintained, so as to achieve the effects of convenient disassembly and maintenance of the fins, and reducing the cleaning and maintenance cost.

[0039] Finally, it should be noted that: the above is only the preferred embodiment of the present application, and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A finned tube heat exchanger comprising an exchange box (1), characterized in that: The inner wall of the exchange box (1) is fixedly connected with a plurality of base pipes (5), the base pipes (5) are distributed in an array, the outer wall of the base pipe (5) is provided with a plurality of fin assemblies, the fin assemblies are distributed in an array on the outer wall of the base pipe (5), and the fin assemblies are used to increase the heat transfer area. The fin assembly comprises upper fins (6) and lower fins (7), the outer walls of the upper fins (6) and the lower fins (7) are slidably connected to the outer wall of the base pipe (5), the outer walls of the upper fins (6) and the lower fins (7) on one side are fixedly connected with connecting blocks (10), the connecting blocks (10) are fixedly connected with connecting rods (8) inside, the connecting rods (8) are provided with connecting seats (9) on the outer wall, the connecting rods (8) are rotatably connected in the connecting seats (9), the upper fins (6) and the lower fins (7) are provided with grooves (11) on the side walls, and the upper fins (6) and the lower fins (7) are provided with locking assemblies therebetween.

2. A finned tube heat exchanger according to claim 1, wherein: The locking assembly comprises a fixed block (13), the outer wall of the fixed block (13) is fixedly connected to the inside of the upper fin (6), the inner walls of the fixed block (13) are slidably connected with limiting beads (15) on the left and right sides, the side walls of the limiting beads (15) are provided with limiting springs (14), one end of the limiting spring (14) is fixedly connected to the inner wall of the fixed block (13), and the other end of the limiting spring (14) is fixedly connected to the outer wall of the limiting bead (15). The top of the lower fin (7) is fixedly connected with a protruding block (12).

3. The finned tube heat exchanger according to claim 1, wherein: The base pipe (5) is provided with a connecting assembly at both ends, the connecting assembly comprises a connecting pipe (4), and the connecting pipe (4) is fixedly connected to the outer wall of the base pipe (5) at both ends.

4. A finned tube heat exchanger according to claim 2, wherein: The outer walls of the exchange box (1) are provided with heat supply pipes (2) on the left and right sides, and the outer wall of the heat supply pipe (2) is fixedly connected to the inside of the exchange box (1).

5. A finned tube heat exchanger according to claim 4, wherein: The outer wall of the exchange box (1) is provided with a plurality of fixed seats (16), the fixed seats (16) are distributed on the two sides of the outer wall of the exchange box (1), the side walls of the fixed seats (16) are fixedly connected to the outer wall of the exchange box (1), and the inside of the fixed seat (16) is communicated with the inside of the connecting pipe (4).

6. A finned tube heat exchanger according to claim 5 wherein: A plurality of rolling beads (18) are slidably connected in the inside of the fixed seat (16), the rolling beads (18) are circumferentially distributed in the inside of the fixed seat (16), the outer wall of the fixed seat (16) is provided with a movable sliding ring (19), and the movable sliding ring (19) is slidably connected to the outer wall of the fixed seat (16).

7. A finned tube heat exchanger according to claim 6 wherein: The inner wall of the fixed seat (16) is fixedly connected with a limiting block (20), the outer wall of the fixed seat (16) is sleeved with a reset spring (17), one end of the reset spring (17) is fixedly connected to the side wall of the fixed seat (16), and the other end of the reset spring (17) is fixedly connected to the side wall of the limiting block (20).

8. A finned tube heat exchanger according to claim 7, wherein: The inner wall of the fixed seat (16) is slidably connected with an inner pipe (21), the side wall of the inner pipe (21) is fixedly connected with an inlet and outlet pipe (3), and the outer wall of the inner pipe (21) is provided with a limiting groove (22).

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