Refrigeration and heating exchanger with automatic descaling

Abstract

The utility model relates to refrigeration and heating heat exchanger technical field, and disclose a kind of automatic descaling refrigeration and heating heat exchanger.The automatic descaling refrigeration and heating heat exchanger, including shell, front pipe box, rear pipe box, tube sheet and heat exchange tube, the left end of the shell is fixedly connected with tube sheet and front pipe box by bolt, the right end of the shell is fixedly connected with rear pipe box by bolt, the device has the gear mechanism of screw rod and be driven by motor, to drive hard scraper ring to move, realize efficient, low-cost continuous descaling, especially suitable for the advantages such as heat exchanger maintenance in high hardness water quality environment, solve the drawbacks of manual cleaning, need to be disassembled heat exchange tube, time-consuming and labor-consuming, affect production continuity, chemical cleaning may corrode pipe wall, shorten equipment life, and existing automatic descaling technology is insufficient, part of patent uses high pressure spray or ultrasonic descaling, but there is the problem of high energy consumption, complex structure or risk of damage to pipe wall.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration and heating exchanger technology, specifically to an automatic descaling refrigeration and heating exchanger. Background Technology

[0002] Refrigeration and heat exchangers are widely used in air conditioning, refrigeration equipment, industrial temperature control and other fields. Their core component, the heat exchange tube, is prone to a decrease in heat exchange efficiency due to scale buildup after long-term operation.

[0003] Traditional descaling methods have the following problems: manual cleaning has drawbacks, requiring shutdown and disassembly of heat exchange tubes, which is time-consuming and labor-intensive, affecting production continuity; chemical cleaning may corrode the tube wall and shorten the equipment life; and existing automatic descaling technology is insufficient. Some patents use high-pressure jetting or ultrasonic descaling, but these have high energy consumption, complex structure, or risk of damaging the tube wall. Therefore, an automatic descaling refrigeration and heat exchanger is proposed to solve the above problems. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides an automatic descaling refrigeration and heat exchanger. It features a motor-driven screw and gear mechanism that moves a rigid scraper ring, enabling efficient and low-cost continuous descaling. This is particularly suitable for heat exchanger maintenance in high-hardness water environments. It overcomes the drawbacks of manual cleaning, which requires shutdown and disassembly of heat exchange tubes, is time-consuming and labor-intensive, and disrupts production continuity. Chemical cleaning may corrode the tube walls, shortening equipment lifespan. Furthermore, existing automatic descaling technologies are insufficient; some patents employ high-pressure jetting or ultrasonic descaling, but these suffer from high energy consumption, complex structures, or the risk of tube wall damage.

[0006] (II) Technical Solution

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: an automatic descaling refrigeration and heating exchanger, including a shell, a front tube box, a rear tube box, a tube sheet and heat exchange tubes, wherein the left end of the shell is fixedly connected to the tube sheet and the front tube box by bolts, and the right end of the shell is fixedly connected to the rear tube box by bolts.

[0008] The front tube box is fixedly connected to a horizontal tube side partition. The right end of the tube side partition is tightly fitted to the left side of the tube plate. The top and bottom of the front tube box are respectively fixedly connected to a first tube box connector and a second tube box connector that communicate with the interior.

[0009] The top and bottom of the left end of the housing are respectively fixedly connected to an inlet pipe and an outlet pipe that communicate with the interior. The inner side of the right end of the housing is provided with a protruding ring, and the bottom of the right end of the housing is fixedly connected to a slag discharge pipe that communicates with the interior.

[0010] The left side of the tube sheet is fixedly connected to several heat exchange tubes extending into the rear tube box. The outer side of the right end of each heat exchange tube is fixedly connected to the same partition plate that fits tightly against the left side of the raised ring. The outer side of each heat exchange tube is fitted with the same and compatible scale scraping assembly. The right side of the tube sheet is provided with transmission assemblies that are symmetrically distributed vertically and extend through the partition plate to the right side of the rear tube box. The transmission assemblies are all connected to the scale scraping assemblies. The right side of the rear tube box is provided with drive assemblies that mesh with the transmission assemblies.

[0011] The beneficial effects of this utility model are:

[0012] This automatic descaling refrigeration and heating exchanger closes the inlet and outlet water pipes. The drive component rotates synchronously with the transmission component, which in turn moves the scraping component slowly along the heat exchange tubes. The scraping component removes scale from the surface of the heat exchange tubes. After scraping, the inlet and outlet water pipes are opened, and water enters the shell from the inlet water pipe, carrying away the detached scale through the outlet water pipe, thus completing the automatic cleaning. It features a motor-driven screw and gear mechanism that drives the rigid scraper ring to move, achieving efficient and low-cost continuous descaling. It is especially suitable for heat exchanger maintenance in high-hardness water environments.

[0013] Based on the above technical solution, the present invention can be further improved as follows.

[0014] Furthermore, the scraping assembly includes a rigid scraping ring, a diamond-shaped plate, and lugs. The outer side of each heat exchange tube is fitted with a rigid scraping ring that contacts the outer side. The outer side of each rigid scraping ring is fixedly connected to the same diamond-shaped plate, and lugs are fixedly connected to both the upper and lower sides of the diamond-shaped plate.

[0015] Furthermore, the transmission assembly includes a lead screw and a first gear. The right side of the tube sheet is rotatably connected to a lead screw that is symmetrically distributed vertically and extends to the right side of the rear tube box via an attachment lug and a partition plate. The lead screw is threadedly connected to the attachment lug, and the lead screw is rotatably connected to the partition plate. The right end of the lead screw is fixedly connected to the first gear.

[0016] Furthermore, the drive assembly includes a motor and a second gear. The motor is fixedly connected to the right side of the rear tube box, and the output end of the motor is fixedly connected to a second gear located on the right side of the rear tube box and meshing with the first gear.

[0017] The beneficial effect of adopting the above-mentioned further solution is that closing the inlet and outlet pipes allows the motor to drive the second gear to rotate. Since the second gear meshes with the first gear, it then drives the lead screw to rotate synchronously through the first gear. Furthermore, since the lead screw is threadedly connected to the lug, the lug moves along the axial direction of the lead screw, thereby pushing the diamond plate and the hard scraper ring to scrape off the scale on the surface of the heat exchange tube. After scraping off the scale, the inlet and outlet pipes are opened, and water enters the shell from the inlet pipe, carrying the detached scale out through the outlet pipe, thus completing the automatic cleaning.

[0018] Furthermore, the hard scraper ring is made of tungsten steel or ceramic.

[0019] The beneficial effect of adopting the above-mentioned further solutions is that the hard scraper ring made of tungsten steel or ceramic material is wear-resistant and can extend its service life. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a right-side sectional view of the casing of this utility model;

[0022] Figure 3 This is a right view of the rear tube box structure of this utility model;

[0023] Figure 4 This is an enlarged schematic diagram of the structure at point a of this utility model.

[0024] In the diagram: 1. Shell; 2. Front tube box; 3. Rear tube box; 4. Tube sheet; 5. Heat exchange tube; 6. Tube side partition; 7. First tube box connector; 8. Second tube box connector; 9. Inlet pipe; 10. Outlet pipe; 11. Raised ring; 12. Slag discharge pipe; 13. Partition plate; 14. Scaling assembly; 141. Hard scraper ring; 142. Diamond plate; 143. Lug; 15. Transmission assembly; 151. Lead screw; 152. First gear; 16. Drive assembly; 161. Motor; 162. Second gear. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the embodiments, by Figure 1-4 The present invention provides an automatic descaling refrigeration and heat exchanger, comprising a housing 1, a front tube box 2, a rear tube box 3, a tube sheet 4, and heat exchange tubes 5. The left end of the housing 1 is fixedly connected to the tube sheet 4 and the front tube box 2 by bolts, and the right end of the housing 1 is fixedly connected to the rear tube box 3 by bolts.

[0027] The front tube box 2 is fixedly connected to a horizontal tube side partition 6. The right end of the tube side partition 6 is tightly fitted to the left side of the tube plate 4. The top and bottom of the front tube box 2 are respectively fixedly connected to a first tube box connector 7 and a second tube box connector 8 that communicate with the interior.

[0028] The top and bottom of the left end of the housing 1 are respectively fixedly connected to the inlet pipe 9 and the outlet pipe 10, which communicate with the interior. The inner side of the right end of the housing 1 is provided with a protruding ring 11, and the bottom of the right end of the housing 1 is fixedly connected to the slag discharge pipe 12, which communicates with the interior.

[0029] The left side of the tube sheet 4 is fixedly connected to several heat exchange tubes 5 extending into the rear tube box 3. The outer side of the right end of the heat exchange tube 5 is fixedly connected to the same partition plate 13 that is tightly fitted to the left side of the protruding ring 11. The outer side of the heat exchange tube 5 is fitted with the same and compatible scraping assembly 14. The right side of the tube sheet 4 is provided with transmission assemblies 15 that are symmetrically distributed vertically and extend through the partition plate 13 to the right side of the rear tube box 3. The transmission assemblies 15 are all connected to the scraping assembly 14. The right side of the rear tube box 3 is provided with drive assemblies 16 that mesh with the transmission assemblies 15.

[0030] The scale removal assembly 14 includes a hard scraper ring 141, a diamond plate 142, and an attachment 143. The outer side of each heat exchange tube 5 is fitted with a hard scraper ring 141 that contacts the outer side. The outer side of each hard scraper ring 141 is fixedly connected to the same diamond plate 142. The upper and lower sides of the diamond plate 142 are fixedly connected to the attachment 143.

[0031] The transmission assembly 15 includes a lead screw 151 and a first gear 152. The right side of the tube sheet 4 is rotatably connected to a lead screw 151 that is symmetrically distributed vertically and extends to the right side of the rear tube box 3 via an attachment lug 143 and a partition plate 13. The lead screw 151 is threadedly connected to the attachment lug 143. The lead screw 151 is rotatably connected to the partition plate 13. The right end of the lead screw 151 is fixedly connected to the first gear 152.

[0032] The drive assembly 16 includes a motor 161 and a second gear 162. The motor 161 is fixedly connected to the right side of the rear tube box 3, and the output end of the motor 161 is fixedly connected to the second gear 162 located on the right side of the rear tube box 3 and meshing with the first gear 152.

[0033] When the inlet pipe 9 and outlet pipe 10 are closed, the motor 161 drives the second gear 162 to rotate. Since the second gear 162 meshes with the first gear 152, the first gear 152 drives the lead screw 151 to rotate synchronously. Since the lead screw 151 is threadedly connected to the lug 143, the lug 143 moves along the lead screw axis, thereby pushing the diamond plate 142 and the hard scraper ring 141 to scrape off the scale on the surface of the heat exchange tube 5. After scraping off the scale, the inlet pipe 9 and the slag discharge pipe 12 are opened. Water enters the shell 1 from the inlet pipe 9 and carries the detached scale out through the slag discharge pipe 12, completing the automatic cleaning.

[0034] The hard scraper ring 141 is made of tungsten carbide or ceramic.

[0035] The 141 hardened scraper ring, made of tungsten carbide or ceramic, is wear-resistant and can extend its service life.

[0036] Working principle:

[0037] When the inlet pipe 9 and outlet pipe 10 are closed, the motor 161 drives the second gear 162 to rotate. Since the second gear 162 is meshed with the first gear 152, the first gear 152 drives the lead screw 151 to rotate synchronously. Since the lead screw 151 is threadedly connected to the lug 143, the lug 143 moves along the axial direction of the lead screw, thereby pushing the rhomboid plate 142 and the hard scraper ring 141 to scrape off the scale on the surface of the heat exchange tube 5. After scraping off the scale, the inlet pipe 9 and the slag discharge pipe 12 are opened. Water enters the shell 1 from the inlet pipe 9, carrying the detached scale out through the slag discharge pipe 12, thus completing the automatic cleaning.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic descaling refrigeration and heat exchanger, comprising a shell (1), a front tube box (2), a rear tube box (3), a tube sheet (4), and heat exchange tubes (5), characterized in that: The left end of the housing (1) is fixedly connected to the tube sheet (4) and the front tube box (2) by bolts, and the right end of the housing (1) is fixedly connected to the rear tube box (3) by bolts. The front tube box (2) is fixedly connected to a horizontal tube side partition (6). The right end of the tube side partition (6) is tightly attached to the left side of the tube plate (4). The top and bottom of the front tube box (2) are respectively fixedly connected to a first tube box connector (7) and a second tube box connector (8) that communicate with the inside. The top and bottom of the left end of the housing (1) are respectively fixedly connected to the inlet pipe (9) and the outlet pipe (10) communicating with the interior. The inner side of the right end of the housing (1) is provided with a protruding ring (11), and the bottom of the right end of the housing (1) is fixedly connected to the slag discharge pipe (12) communicating with the interior. The tube sheet (4) has several heat exchange tubes (5) that extend into the rear tube box (3) fixedly connected to the left side. The right side of the heat exchange tube (5) is fixedly connected to the same partition plate (13) that fits tightly against the left side of the protruding ring (11). The heat exchange tube (5) is fitted with the same and compatible scraping assembly (14). The tube sheet (4) has a transmission assembly (15) that is symmetrically distributed vertically and extends through the partition plate (13) to the right side of the rear tube box (3). The transmission assembly (15) is connected to the scraping assembly (14). The rear tube box (3) has a drive assembly (16) that meshes with the transmission assembly (15).

2. The automatic descaling refrigeration and heat exchanger according to claim 1, characterized in that: The scraping assembly (14) includes a hard scraping ring (141), a rhombus plate (142), and an attachment (143). The heat exchange tube (5) is fitted with a hard scraping ring (141) that contacts the outside of the tube. The same rhombus plate (142) is fixedly connected to the outside of the hard scraping ring (141). The upper and lower sides of the rhombus plate (142) are fixedly connected with attachments (143).

3. The automatic descaling refrigeration and heat exchanger according to claim 2, characterized in that: The hard scraper ring (141) is made of tungsten steel or ceramic.

4. The automatic descaling refrigeration and heat exchanger according to claim 3, characterized in that: The transmission assembly (15) includes a lead screw (151) and a first gear (152). The right side of the tube sheet (4) is rotatably connected to a lead screw (151) that is symmetrically distributed vertically and extends to the right side of the rear tube box (3) via an attachment lug (143) and a partition plate (13). The lead screw (151) is threadedly connected to the attachment lug (143) and rotatably connected to the partition plate (13). The right end of the lead screw (151) is fixedly connected to the first gear (152).

5. The automatic descaling refrigeration and heat exchanger according to claim 4, characterized in that: The drive assembly (16) includes a motor (161) and a second gear (162). The motor (161) is fixedly connected to the right side of the rear tube box (3). The output end of the motor (161) is fixedly connected to the second gear (162) located on the right side of the rear tube box (3) and meshing with the first gear (152).

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