Descaling structure of tubular heat exchanger

Abstract

The utility model discloses a descaling structure of a tube type heat exchanger, which relates to the technical field of tube type heat exchangers and comprises a tube body, a sliding chute is arranged on the side wall of the tube body, a sliding rod is slidably connected to the inner side wall of the sliding chute, one end of the sliding rod is fixedly connected with a ring sleeve, the ring sleeve is slidably connected with a vertical rod, and a scraper is detachably connected to the surface of the ring sleeve. A top seat is fixedly connected to the top end of the pipe body, an embedding groove is formed in the side wall of the top seat, a fixing part is slidably connected to the inner side wall of the embedding groove, moving rollers are rotatably connected to the inner side wall of the fixing part, a transmission mechanism for stretching the moving rollers is arranged in the top seat, and a lifting mechanism for lifting the sliding rod is arranged on the inner side wall of the pipe body; the whole structure is convenient to move in the heat exchange tube, a descaling structure is convenient to erect, meanwhile, the telescopic moving rollers can adapt to heat exchangers of different models and sizes, adaptability is high, water scales on the inner side wall of the heat exchange tube can be effectively removed, descaling efficiency is high, the descaling effect is good, and practicability is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of shell-and-tube heat exchangers, in particular to a descaling structure of a shell-and-tube heat exchanger. Background Art

[0002] A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid. It generally includes a shell, a tube box at both ends of the shell, a tube sheet between the tube box and the shell, and a plurality of heat exchange tubes in the shell that connect the two tube sheets. The multiple heat exchange tubes connect the two tube boxes so that the fluid A in one of the tube boxes enters the other tube box through the multiple heat exchange tubes to exchange heat with the fluid B in the shell. Since water is usually introduced into the tube box, and the salts in the water will precipitate from the water when the temperature rises, and adhere to the inner wall of the heat exchange tube to form scale. With the increase of usage time and frequency of use, the scale layer will gradually become thicker and harder, which will affect the flow efficiency of water in the heat exchanger, and the heat exchanger needs to be descaled.

[0003] After searching, it was found that the Chinese patent with announcement number CN218723512U discloses a shell-and-tube heat exchanger descaling and cleaning mechanism, including a bottom plate, a flushing rack is provided on one side of the top of the bottom plate, a PLC controller is provided on one side of the flushing rack, a cleaning disc is fixedly installed on the top of the flushing rack, a current limiting solenoid valve is provided on one side of the cleaning disc, a mounting disc is fixedly installed on the other side of the cleaning disc, a positioning pipe is distributed at one end of the mounting disc, a water tank is provided on one side of the bottom plate, a water pump is provided on the top of the water tank, and the water outlet of the water pump is connected to the water inlet end of the current limiting solenoid valve through a connecting pipe. The utility model provides a shell-and-tube heat exchanger descaling and cleaning mechanism, a reversing solenoid valve is provided to switch the flow direction of water, and the water pump pumps the solution into the mounting disc to soak the internal pipes of the heat exchanger to dissolve the scale in the pipes. When the scale is dissolved, the reversing solenoid valve is switched again, the water pump pumps water, and the water flows into the mounting disc and flushes the pipes in the heat exchanger to complete the cleaning of the scale in the internal pipes of the heat exchanger.

[0004] The above utility model has the following problems:

[0005] 1. The existing shell-and-tube heat exchanger descaling mechanism has a single descaling method, which is mostly flushed by water flow combined with descaling liquid. The descaling efficiency of the shell-and-tube heat exchanger with a thicker scale layer and a long scale sedimentation time is low, the descaling effect is poor, and it is not convenient to use.

[0006] Therefore, those skilled in the art provide a descaling structure for a shell-and-tube heat exchanger to solve the problems raised in the above background technology. Utility Model Content

[0007] The utility model aims to provide a descaling structure for a shell-and-tube heat exchanger to solve the problems raised in the above-mentioned background technology.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A descaling structure for a shell-and-tube heat exchanger comprises a tube body, a slide groove is provided on the side wall of the tube body, a slide rod is slidably connected to the inner side wall of the slide groove, a ring sleeve is fixedly connected to one end of the slide rod, the ring sleeve is slidably connected to the vertical rod, a scraper is detachably connected to the surface of the ring sleeve, a top seat is fixedly connected to the top of the tube body, an embedding groove is provided on the side wall of the top seat, a fixing piece is slidably connected to the inner side wall of the embedding groove, a moving roller is rotatably connected to the inner side wall of the fixing piece, a transmission mechanism for retracting and extending the moving roller is arranged inside the top seat, and a lifting mechanism for lifting and lowering the slide rod is arranged on the inner side wall of the tube body.

[0010] As a further solution of the utility model: the lifting mechanism includes a transmission chamber, a reciprocating screw, a screw sleeve and a movable block. The tube body is provided with a transmission chamber, the inner side wall of the transmission chamber is rotatably connected to the reciprocating screw, the surface of the reciprocating screw is threadedly connected to the screw sleeve, the surface of the screw sleeve is fixedly connected to the movable block, and the side wall of the movable block is fixedly connected to one end of the sliding rod.

[0011] As a further solution of the utility model: a controller is fixedly connected to the surface of the tube body, a drive motor is fixedly connected to one end of the can, a power output end of the drive motor is fixedly connected to one end of the reciprocating screw rod, and the drive motor is electrically connected to an external power supply through the controller.

[0012] As a further solution of the utility model: an ultrasonic transducer is fixedly connected to the lower surface of the ring sleeve, and the ultrasonic transducer is electrically connected to an external ultrasonic generator.

[0013] As a further solution of the utility model: the transmission mechanism includes a limit groove, a limit block, a telescopic rod, a threaded rod, a driven bevel gear, a knob, a transmission rod and a transmission bevel gear, the inner side wall of the top seat is provided with two groups of limit grooves, and the two groups of limit grooves are symmetrically arranged, the inner side walls of the limit grooves are slidably connected to the limit blocks, and the side walls of the limit blocks are fixedly connected to the telescopic rod.

[0014] As a further solution of the utility model: a threaded inner cavity is provided inside the telescopic rod, a threaded rod is threadedly connected to the inner side wall of the threaded inner cavity, and a driven bevel gear is fixedly connected to one end of the threaded rod.

[0015] As a further solution of the utility model: the top wall of the inner cavity of the top seat is rotatably connected with a transmission rod, one end of the transmission rod is fixedly connected with a transmission bevel gear, and the transmission bevel gear is meshed and connected with the driven bevel gear.

[0016] As a further solution of the utility model: a knob is rotatably connected to the surface of the top seat, one end of the knob is fixedly connected to one end of the transmission rod, and the surface of the knob is provided with evenly arranged anti-slip stripes.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The ultrasonic transducer converts electrical energy into ultrasonic waves, and cleans the scale inside the pipe through the physical effect of ultrasonic vibration. At the same time, the controller controls the operation of the driving motor, and the power output end of the driving motor rotates to drive the reciprocating screw to rotate. The screw sleeve can only move along the direction of the slide groove under the limit of the slide rod and the slide groove. The reciprocating screw rotates to drive the screw sleeve to move, the screw sleeve moves to drive the movable block to move, the movable block moves to drive the slide rod to move, the slide rod moves to drive the ring sleeve to move, and the ring sleeve moves to drive the scraper to move. The reciprocating movement of the scraper can remove the scale. Combined with ultrasonic vibration cleaning, it can effectively remove the scale on the inner wall of the heat exchange tube, with high descaling efficiency and good descaling effect.

[0019] 2. The transmission rod can be driven to rotate by turning the knob, and the transmission rod rotation drives the transmission bevel gear rotation, and the transmission bevel gear rotation drives the two driven bevel gears rotation, and the driven bevel gear rotation drives the threaded rod rotation, and the threaded rod rotation drives the telescopic rod to move under the action of the threaded inner cavity, and the telescopic rod can only extend the axial movement of the telescopic rod when it is limited by the limit groove and the limit block, thereby realizing the simultaneous reverse movement of the two telescopic rods, and the movement of the telescopic rod drives the movement of the fixing part, and the movement of the fixing part drives the movement of the moving roller until the moving roller abuts the inner wall of the heat exchange tube, changing the sliding friction into rolling friction, so that the overall structure is easy to move in the heat exchange tube, and it is easy to set up the descaling structure, and at the same time, the telescopic moving roller can adapt to heat exchangers of different models and sizes, with strong adaptability and easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The schematic diagram of the structure of a descaling structure of a shell and tube heat exchanger is shown in FIG.

[0021] Figure 2 This is a schematic diagram of the internal structure of the tube body in a descaling structure of a shell-and-tube heat exchanger.

[0022] Figure 3 The figure is a schematic diagram of the internal structure of the top seat in the descaling structure of a shell-and-tube heat exchanger.

[0023] Figure 4 The present invention is a structural schematic diagram of a descaling structure of a shell-and-tube heat exchanger installed inside a heat exchange tube.

[0024] In the figure: 1. tube body; 2. controller; 3. transmission chamber; 4. reciprocating screw; 5. screw sleeve; 6. movable block; 7. slide rod; 8. ring sleeve; 9. scraper; 10. slide groove; 11. ultrasonic transducer; 12. drive motor; 13. top seat; 14. fixing part; 15. moving roller; 16. limit groove; 17. limit block; 18. telescopic rod; 19. threaded rod; 20. driven bevel gear; 21. knob; 22. transmission rod; 23. transmission bevel gear. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example 1

[0027] Reference Figure 1-4 The embodiment provides a descaling structure for a shell-and-tube heat exchanger, including a tube body 1, a slide groove 10 is provided on the side wall of the tube body 1, a slide rod 7 is slidably connected to the inner wall of the slide groove 10, a ring sleeve 8 is fixedly connected to one end of the slide rod 7, the ring sleeve 8 is slidably connected to the vertical rod, a scraper 9 is detachably connected to the surface of the ring sleeve 8, a top seat 13 is fixedly connected to the top of the tube body 1, an embedding groove is provided on the side wall of the top seat 13, a fixing member 14 is slidably connected to the inner wall of the embedding groove, a moving roller 15 is rotatably connected to the inner wall of the fixing member 14, and a top seat 13 is provided inside. A transmission mechanism for telescopic moving roller 15 is arranged, and a lifting mechanism for lifting slide rod 7 is arranged on the inner wall of tube body 1. The lifting mechanism includes transmission cavity 3, reciprocating screw rod 4, screw rod sleeve 5 and movable block 6. Transmission cavity 3 is opened inside tube body 1, and reciprocating screw rod 4 is rotatably connected to the inner wall of transmission cavity 3. Screw rod sleeve 5 is threadedly connected to the surface of reciprocating screw rod 4, and movable block 6 is fixedly connected to the surface of screw rod sleeve 5. The side wall of movable block 6 is fixedly connected to one end of slide rod 7, and controller 2 is fixedly connected to the surface of tube body 1. One end of can is fixed A drive motor 12 is connected, and the power output end of the drive motor 12 is fixedly connected to one end of the reciprocating screw 4. The drive motor 12 is electrically connected to an external power supply through a controller 2. An ultrasonic transducer 11 is fixedly connected to the lower surface of the ring sleeve 8, and the ultrasonic transducer 11 is electrically connected to an external ultrasonic generator; the ultrasonic transducer 11 converts electrical energy into ultrasonic waves, and cleans the scale inside the pipeline through the physical effect of ultrasonic vibration. At the same time, the drive motor 12 is controlled to run by the controller 2, and the power output end of the drive motor 12 The rotation drives the reciprocating screw 4 to rotate, and the screw sleeve 5 can only move in the direction of the slide groove 10 under the limitation of the slide rod 7 and the slide groove 10, the rotation of the reciprocating screw 4 drives the screw sleeve 5 to move, the movement of the screw sleeve 5 drives the movable block 6 to move, the movement of the movable block 6 drives the slide rod 7 to move, the movement of the slide rod 7 drives the ring sleeve 8 to move, and the movement of the ring sleeve 8 drives the scraper 9 to move. The reciprocating movement of the scraper 9 is used to scrape off the scale, and the ultrasonic vibration cleaning is combined to effectively remove the scale on the inner wall of the heat exchange tube, with high descaling efficiency and good descaling effect.

[0028] Example 2

[0029] Reference Figure 1 and Figure 3 This embodiment is based on the previous embodiment, and is different from the previous embodiment in that the transmission mechanism includes a limit groove 16, a limit block 17, a telescopic rod 18, a threaded rod 19, a driven bevel gear 20, a knob 21, a transmission rod 22 and a transmission bevel gear 23. Two groups of limit grooves 16 are provided on the inner side wall of the top seat 13, and the two groups of limit grooves 16 are symmetrically arranged. The inner side walls of the limit grooves 16 are slidably connected to the limit blocks 17, and the side walls of the limit blocks 17 are fixedly connected with the telescopic rod 18. A threaded inner cavity is provided inside the telescopic rod 18, and the inner side wall of the threaded inner cavity is threadedly connected with the threaded rod 19, and one end of the threaded rod 19 is fixedly connected with the driven bevel gear 20. The top wall of the inner cavity of the top seat 13 is rotatably connected with the transmission rod 22, and one end of the transmission rod 22 is fixedly connected with the transmission bevel gear 23. The transmission bevel gear 23 is meshed with the driven bevel gear 20, and the surface of the top seat 13 is rotatably connected with the knob 21, and one end of the knob 21 is fixedly connected with one end of the transmission rod 22. The knob 21 is provided with evenly arranged anti-skid stripes on its surface; the transmission rod 22 can be driven to rotate by rotating the knob 21, and the transmission rod 22 drives the transmission bevel gear 23 to rotate, and the transmission bevel gear 23 drives the two driven bevel gears 20 to rotate, and the driven bevel gear 20 drives the threaded rod 19 to rotate, and the threaded rod 19 drives the telescopic rod 18 to move under the action of the threaded inner cavity, and the telescopic rod 18 can only extend the axial movement of the telescopic rod 18 when it is limited by the limit groove 16 and the limit block 17, so as to realize the simultaneous reverse movement of the two telescopic rods 18, and the movement of the telescopic rod 18 drives the fixing part 14 to move, and the movement of the fixing part 14 drives the moving roller 15 to move until the moving roller 15 abuts against the inner wall of the heat exchange tube, changing the sliding friction into the rolling friction, so that the overall structure is convenient to move in the heat exchange tube, and convenient to set up the descaling structure, and at the same time, the telescopic moving roller 15 can adapt to heat exchangers of different models and sizes, has strong adaptability, and is easy to use.

[0030] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0031] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A descaling structure for a shell-and-tube heat exchanger, characterized in that: The utility model comprises a tube body (1), wherein a slide groove (10) is provided on the side wall of the tube body (1), a slide rod (7) is slidably connected to the inner wall of the slide groove (10), a ring sleeve (8) is fixedly connected to one end of the slide rod (7), the ring sleeve (8) is slidably connected to the vertical rod, a scraper (9) is detachably connected to the surface of the ring sleeve (8), a top seat (13) is fixedly connected to the top of the tube body (1), an embedding groove is provided on the side wall of the top seat (13), a fixing piece (14) is slidably connected to the inner wall of the embedding groove, a moving roller (15) is rotatably connected to the inner wall of the fixing piece (14), a transmission mechanism for retracting the moving roller (15) is arranged inside the top seat (13), and a lifting mechanism for lifting and lowering the slide rod (7) is arranged on the inner wall of the tube body (1).

2. The descaling structure of a shell-and-tube heat exchanger according to claim 1, characterized in that: The lifting mechanism comprises a transmission chamber (3), a reciprocating screw rod (4), a screw rod sleeve (5) and a movable block (6); the transmission chamber (3) is provided inside the tube body (1); the inner side wall of the transmission chamber (3) is rotatably connected to the reciprocating screw rod (4); the surface of the reciprocating screw rod (4) is threadedly connected to the screw rod sleeve (5); the surface of the screw rod sleeve (5) is fixedly connected to the movable block (6); and the side wall of the movable block (6) is fixedly connected to one end of a sliding rod (7).

3. The descaling structure of a shell-and-tube heat exchanger according to claim 1, characterized in that: The surface of the tube body (1) is fixedly connected to a controller (2); one end of the can is fixedly connected to a drive motor (12); a power output end of the drive motor (12) is fixedly connected to one end of a reciprocating screw rod (4); and the drive motor (12) is electrically connected to an external power source via the controller (2).

4. The descaling structure of a shell-and-tube heat exchanger according to claim 1, characterized in that: An ultrasonic transducer (11) is fixedly connected to the lower surface of the ring sleeve (8), and the ultrasonic transducer (11) is electrically connected to an external ultrasonic generator.

5. The descaling structure of a shell-and-tube heat exchanger according to claim 1, characterized in that: The transmission mechanism comprises a limit groove (16), a limit block (17), a telescopic rod (18), a threaded rod (19), a driven bevel gear (20), a knob (21), a transmission rod (22) and a transmission bevel gear (23); the inner side wall of the top seat (13) is provided with two groups of limit grooves (16), and the two groups of limit grooves (16) are symmetrically arranged; the inner side walls of the limit grooves (16) are slidably connected to the limit blocks (17), and the side walls of the limit blocks (17) are fixedly connected to the telescopic rod (18).

6. A descaling structure for a shell-and-tube heat exchanger according to claim 5, characterized in that: A threaded inner cavity is provided inside the telescopic rod (18), a threaded rod (19) is threadedly connected to the inner side wall of the threaded inner cavity, and one end of the threaded rod (19) is fixedly connected to a driven bevel gear (20).

7. The descaling structure of a shell-and-tube heat exchanger according to claim 1, characterized in that: The top wall of the inner cavity of the top seat (13) is rotatably connected to a transmission rod (22), one end of the transmission rod (22) is fixedly connected to a transmission bevel gear (23), and the transmission bevel gear (23) is meshed and connected with the driven bevel gear (20).

8. The descaling structure of a shell-and-tube heat exchanger according to claim 1, characterized in that: The surface of the top seat (13) is rotatably connected with a knob (21), one end of the knob (21) is fixedly connected to one end of a transmission rod (22), and the surface of the knob (21) is provided with evenly arranged anti-slip stripes.

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