Superconducting heat pipe waste heat recovery device with cleaning structure

Abstract

The utility model relates to drying machine auxiliary equipment technical field, concretely to a superconducting heat pipe waste heat recovery device with cleaning structure, the inside of heat absorption storehouse and heat release storehouse is equipped with scraper, and the scraper is penetrated by heat pipe and is closely combined with heat pipe, and the middle part of intermediate box is equipped with the empty slot, and the side of scraper close to intermediate box is equipped with the push rod inserted into the inside of empty slot, and the inside of intermediate box is equipped with the cavity, and the cavity is linked together with empty slot, and the fixed frame is fixedly arranged in the cavity, and the pivot is rotatably arranged on the fixed frame, and the both ends of pivot are equipped with the threaded rod inserted into the inside of push rod and is connected with push rod screw thread, when the motor drives pivot rotation, the threaded rod of reverse thread drives push rod and makes the scraper reciprocating movement along the outer wall of heat pipe, and the automatic scraping removes the impurity, eliminates the problem that the thermal resistance increases because of dirt accumulation of traditional waste heat recovery device, and continuously maintains the efficient heat exchange performance of heat pipe.

Description

Technical Field

[0001] This utility model relates to the technical field of dryer auxiliary equipment, specifically a superconducting heat pipe waste heat recovery device with a cleaning structure. Background Technology

[0002] In the field of dryer energy saving, superconducting heat pipe waste heat recovery device is the core equipment for realizing waste heat reuse. It efficiently transfers the waste heat in the dryer exhaust through heat pipe, and sends the waste heat of room temperature fresh air into the dryer, which greatly reduces the energy consumption of subsequent heating links. It has become a key component for dryer energy saving transformation.

[0003] However, the exhaust gas from the dryer often carries material dust, condensate from the moisture, and a small amount of oil and other impurities. During long-term operation, these impurities will gradually adhere to the outer wall of the heat pipe, forming a dense fouling layer. This fouling layer will significantly increase thermal resistance, weaken the heat conduction efficiency of the heat pipe, and cause the waste heat recovery effect to decline continuously. It may even require frequent shutdowns to disassemble the equipment and clean the heat pipe by manual wiping or high-pressure flushing. This not only increases maintenance costs but also interrupts the drying production process and reduces the continuity of equipment operation.

[0004] Existing superconducting heat pipe waste heat recovery devices lack a targeted online cleaning structure, making it impossible to remove impurities from the outer wall of the heat pipe simultaneously during equipment operation, and thus difficult to maintain a stable heat exchange effect over a long period of time. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a superconducting heat pipe waste heat recovery device with a cleaning structure.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a superconducting heat pipe waste heat recovery device with a cleaning structure, comprising a heat exchange box, an intermediate box in the middle part of the heat exchange box, a heat absorption chamber and a heat release chamber respectively arranged on both sides of the intermediate box, a plurality of heat-conducting pipes fixedly arranged on the intermediate box, the heat absorption end of the heat-conducting pipes being located inside the heat absorption chamber, the heat release end of the heat-conducting pipes being located inside the heat release chamber, a scraper being arranged inside the heat absorption chamber and the heat release chamber, the scraper being penetrated by the heat-conducting pipes and tightly fitted to the heat-conducting pipes, a slot being provided in the middle part of the intermediate box, a push rod being arranged on the side of the scraper near the intermediate box and inserted into the slot, a cavity being provided inside the intermediate box, the cavity being connected to the slot, a fixed frame being fixedly arranged in the cavity, a rotating shaft being rotatably arranged on the fixed frame, threaded rods being arranged at both ends of the rotating shaft and threadedly connected to the push rods, a driven bevel gear being arranged in the middle part of the rotating shaft, a drive bevel gear being arranged at the output end of the motor and meshing with the driven bevel gear, and the two threaded rods having a reverse thread structure.

[0009] To facilitate the cleaning of impurities in the heat absorption and heat release chambers, the present invention includes an improvement whereby a cleaning groove is provided below the heat absorption and heat release chambers, and a base plate is provided at the lower end of the heat exchange box, with the base plate fixed to the bottom of the cleaning groove by screws.

[0010] To improve the stability of the push rod during use, the present invention is improved in that both the cross-section of the slot and the push rod are rectangular, and the push rod is tightly fitted to the inner wall of the slot.

[0011] To improve the stability of the rotating shaft during use, the present invention includes an improvement in that a bearing is inlaid on the fixing frame, and the inner ring of the bearing is penetrated by the rotating shaft.

[0012] Furthermore, an improvement of this utility model is that the output end of the motor is provided with a drive shaft that is inserted into the heat exchange box, and the drive bevel gear is fixed at the bottom end of the drive shaft.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, this utility model provides a superconducting heat pipe waste heat recovery device with a cleaning structure, which has the following beneficial effects:

[0015] The heat pipe runs through the heat absorption chamber and the heat release chamber, and realizes the heat exchange between the dryer exhaust gas and fresh air through the superconducting thermal properties. At the same time, the scrapers in the heat absorption chamber and the heat release chamber are in close contact with the heat pipe. When the motor drives the shaft to rotate, the reverse threaded rod drives the push rod to make the scraper move back and forth along the outer wall of the heat pipe, automatically scraping away impurities. This eliminates the problem of increased thermal resistance caused by dirt accumulation in traditional waste heat recovery devices and continuously maintains the high-efficiency heat exchange performance of the heat pipe. Attached Figure Description

[0016] Figure 1 This is a first-view perspective three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a second-view perspective three-dimensional structural diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of the internal structure of the heat absorption chamber and the heat release chamber in this utility model;

[0019] Figure 4 This is a schematic diagram of the meshing structure between the drive bevel gear and the driven bevel gear in this utility model.

[0020] In the diagram: 1. Heat exchanger; 2. Heat absorption chamber; 3. Heat release chamber; 4. Heat conduction pipe; 5. Intermediate chamber; 6. Cleaning trough; 7. Base plate; 8. First air inlet pipe; 9. First exhaust pipe; 10. Second air inlet pipe; 11. Second exhaust pipe; 12. Scraper; 13. Empty trough; 14. Push rod; 15. Fixing frame; 16. Rotating shaft; 17. Threaded rod; 18. Drive bevel gear; 19. Driven bevel gear; 20. Motor. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-4 This utility model discloses a superconducting heat pipe waste heat recovery device with a cleaning structure, comprising a heat exchange box 1, an intermediate box 5 in the middle part of the heat exchange box 1, and heat absorption chambers 2 and heat release chambers 3 respectively on both sides of the intermediate box 5. Multiple heat-conducting pipes 4 are fixedly mounted on the intermediate box 5. The heat absorption end of the heat-conducting pipe 4 is located inside the heat absorption chamber 2, and the heat release end of the heat-conducting pipe 4 is located inside the heat release chamber 3. Scrapers 12 are provided inside the heat absorption chamber 2 and the heat release chamber 3, and the scrapers 12 are penetrated by the heat-conducting pipes 4 and are tightly fitted to the heat-conducting pipes 4. A slot 1 is provided in the middle part of the intermediate box 5. 3. The scraper 12 is provided with a push rod 14 that is inserted into the cavity 13 on the side near the intermediate box 5. The intermediate box 5 has a cavity that is connected to the cavity 13. A fixed frame 15 is fixedly installed in the cavity. A rotating shaft 16 is rotatably installed on the fixed frame 15. Both ends of the rotating shaft 16 are provided with threaded rods 17 that are inserted into the push rod 14 and threadedly connected to the push rod 14. The middle part of the rotating shaft 16 is provided with a driven bevel gear 19. The output end of the motor 20 is provided with a drive bevel gear 18 that meshes with the driven bevel gear 19. The two threaded rods 17 have a reverse thread structure.

[0023] Waste heat recovery process:

[0024] The hot exhaust gas generated by the dryer flows into the heat absorption chamber 2 through the first air inlet pipe 8 and comes into contact with the heat absorption end of the heat conduction pipe 4. The heat is transferred to the heat release end through the heat absorption end of the heat conduction pipe 4.

[0025] The exhaust gas after heat exchange is discharged from the first exhaust pipe 9, while the fresh air required by the dryer enters the heat release chamber 3 through the second air inlet pipe 10. In the heat release chamber 3, it exchanges heat with the heat release end of the heat conduction pipe 4 to complete the waste heat process, and finally is delivered to the dryer air inlet pipeline through the second exhaust pipe 11.

[0026] Both the slot 13 and the push rod 14 have rectangular cross sections, and the push rod 14 is in close contact with the inner wall of the slot 13.

[0027] During this process, the scrapers 12 in the heat absorption chamber 2 and the heat release chamber 3 are closely attached to the outer wall of the heat conduction pipe 4. In the initial state, their push rods 14 are inserted into the empty slots 13 of the intermediate box 5 to ensure that the scraper 12 is in a stable position during the heat exchange process.

[0028] Cleaning procedure for heat pipe 4:

[0029] The output end of the motor 20 is provided with a drive shaft that is inserted into the heat exchange box 1, and the drive bevel gear 18 is fixed at the bottom end of the drive shaft.

[0030] The fixed frame 15 is fitted with a bearing, and the inner ring of the bearing is penetrated by the rotating shaft 16.

[0031] The motor 20 is started periodically. The drive shaft at the output end of the motor 20 drives the drive bevel gear 18 to rotate. The drive bevel gear 18 meshes with the driven bevel gear 19 in the middle of the rotating shaft 16, causing the rotating shaft 16 to rotate.

[0032] Since the threaded rods 17 at both ends of the rotating shaft 16 have a reverse thread structure and the threaded rods 17 are threadedly connected to the push rods 14, when the rotating shaft 16 rotates, the push rods 14 on both sides extend outward from the empty slot 13 simultaneously.

[0033] Push rod 14 drives scraper 12 to move along the outer wall of heat pipe 4 to scrape off attached dust, condensate and other impurities. The cleaned impurities fall into the cleaning groove 6 below heat absorption chamber 2 and heat release chamber 3.

[0034] After cleaning is completed, motor 20 reverses, push rod 14 drives scraper 12 to reset, so that scraper 12 re-fits the two sides of the middle box 5, waiting for the next cleaning.

[0035] Centralized treatment of impurities:

[0036] A cleaning groove 6 is provided below the heat absorption chamber 2 and the heat release chamber 3, and a bottom plate 7 is provided at the lower end of the heat exchange box 1. The bottom plate 7 is fixed to the bottom of the cleaning groove 6 by screws.

[0037] When impurities accumulate to a certain amount in the cleaning tank 6, the bottom plate 7 at the lower end of the heat exchange box 1 can be removed to easily handle the impurities in the cleaning tank 6, avoiding the need for manual entry into the equipment.

[0038] The rectangular cross-section design of the empty groove 13 and the push rod 14, along with their tightly fitting inner walls, ensures that the push rod 14 moves without wobbling, improving the stability of the scraper 12 during cleaning. The bearing embedded in the fixed frame 15 supports the rotation of the rotating shaft 16, reducing frictional loss and ensuring the reliability of the transmission structure. In addition, the detachable design of the cleaning groove 6 and the base plate 7 allows for impurity cleaning without disassembling the entire machine; only the base plate 7 needs to be removed, significantly reducing maintenance difficulty and downtime.

[0039] The motor 20 drives the meshing transmission between the driven bevel gear 18 and the driven bevel gear 19 to achieve automated control of the scraper 12 cleaning. The cleaning frequency can be set according to the operating conditions of the dryer without manual intervention. The reverse threaded rod 17 structure enables the scrapers 12 on both sides to move synchronously, avoiding uneven force on the heat conduction pipe 4 during the cleaning process, ensuring long-term stable operation of the equipment, especially suitable for continuous production scenarios of dryers, and improving the overall energy efficiency of the system.

[0040] The intermediate box 5 serves as the core support structure, fixing the heat pipe 4 and providing a guide slot 13 for the push rod 14; the cleaning slot 6 cooperates with the bottom plate 7 to form an impurity collection channel, preventing impurities from accumulating and affecting heat exchange; the optimized design of transmission components such as bearings and drive shafts reduces mechanical wear and extends the service life of the equipment.

[0041] Heat pipe 4 (core heat exchange element):

[0042] Materials: Copper-based superconducting thermal composite materials (such as copper-aluminum composite tubes or heat pipes filled with metal oxides).

[0043] Reasons for selection:

[0044] Its thermal conductivity can reach 10-100 times that of traditional copper tubes, meeting the requirements of superconductivity and quickly transferring the heat of the dryer exhaust gas to fresh air.

[0045] It has excellent high temperature resistance (can withstand hot exhaust gas at 150-200℃) and strong oxidation resistance, avoiding the decay of thermal conductivity under long-term high temperature.

[0046] The smooth outer wall design reduces the adhesion of impurities and makes it easier to remove dirt when cleaning with scraper 12.

[0047] Scraper 12 (for cleaning core components):

[0048] Materials: Polytetrafluoroethylene (PTFE) or 316L stainless steel.

[0049] Reasons for selection:

[0050] PTFE material has a low coefficient of friction (0.05-0.1), which makes it less likely to scratch the tube when it is attached to the outer wall of the heat pipe 4. It is also resistant to acids and alkalis and has anti-adhesion properties, making it suitable for cleaning dust and light oil stains.

[0051] 316L stainless steel has high hardness (HV150-200) and strong wear resistance, making it suitable for harsh working conditions containing particulate impurities. The edges are passivated to prevent scratching the heat pipe.

[0052] The structure adopts an arc-shaped fitting design, with a contact area of ​​≥80% with the outer wall of the heat pipe 4, ensuring thorough cleaning.

[0053] Push rod 14, threaded rod 17 (transmission actuator):

[0054] Material: 45# steel (chrome plated).

[0055] Reasons for selection:

[0056] 45# steel has high strength (tensile strength ≥600MPa) and excellent comprehensive mechanical properties after quenching and tempering. It can withstand the friction and torque when the scraper 12 moves.

[0057] The chrome plating layer is 5-10μm thick and has a surface hardness of HV900 or higher. It is wear-resistant and corrosion-resistant, preventing the push rod 14 from rusting and getting stuck when sliding in the slot 13.

[0058] The threaded rod 17 adopts a trapezoidal thread (tooth angle 30°), which has high transmission efficiency (≥70%) and good self-locking properties, preventing the push rod 14 from slipping accidentally during the cleaning process.

[0059] Shaft 16, drive bevel gear 18, driven bevel gear 19 (transmission system):

[0060] Material: 20CrMnTi carburized gear steel.

[0061] Reasons for selection:

[0062] After carburizing and quenching, the surface hardness is HRC58-62, and the core has good toughness, making it suitable for withstanding alternating loads and preventing wear or breakage during gear meshing.

[0063] The bevel gear module is 2-3mm, the pressure angle is 20°, and the transmission ratio is 1:1 (or adjusted according to the motor speed 20), ensuring that the push rods 14 on both sides move synchronously and the cleaning force is uniform.

[0064] The shaft 16 has a diameter of 15-20mm, and the mounting area for the bearing is ground (roughness Ra≤1.6) to reduce rotational resistance.

[0065] Fixture 15, Bearing (Support Component):

[0066] Fixture 15 Material: Q235B carbon steel (surface coated with anti-rust paint).

[0067] Bearing model: Deep groove ball bearing 6205 (inner diameter 25mm).

[0068] Reasons for selection:

[0069] The fixing bracket 15 is made of steel plate by bending and welding, which is low in cost and has sufficient support strength. The bearing is embedded with an interference fit tolerance (H7 / k6) to ensure stable installation.

[0070] The 6205 bearing has a rated dynamic load of 14.0kN and is suitable for low-speed rotation (5-10r / min) of 16-inch shafts. It comes with a dust cover to reduce dust intrusion and has a long maintenance cycle.

[0071] Motor 20 (power source):

[0072] Model: Miniature geared motor (e.g., NMRV040-100-S0.75kW).

[0073] Specifications: Power 0.75kW, speed 1400r / min (output speed 5-10r / min after deceleration), protection level IP54.

[0074] Reasons for selection:

[0075] The geared motor has a large output torque (≥10 N·m), which can overcome the frictional resistance (approximately 5-8 N·m) between the scraper 12 and the heat pipe 4, ensuring that the push rod 14 moves smoothly.

[0076] With an IP54 protection rating, it is dustproof and waterproof, suitable for dusty environments in dryer workshops, and supports forward and reverse rotation control to meet the needs of cleaning reciprocating motions.

[0077] In the description herein, it should be noted that relational terms such as "first" and "second" are used merely 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 process, method, article, or apparatus.

[0078] 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.

Claims

1. A superconducting heat pipe waste heat recovery device with a cleaning structure, comprising a heat exchange box (1), characterized in that: The heat exchange box (1) has an intermediate box (5) in the middle part. A heat absorption chamber (2) and a heat release chamber (3) are respectively arranged on both sides of the intermediate box (5). Multiple heat-conducting pipes (4) are fixedly installed on the intermediate box (5). The heat-absorbing end of the heat-conducting pipe (4) is located inside the heat absorption chamber (2), and the heat-releasing end of the heat-conducting pipe (4) is located inside the heat release chamber (3). Scrapers (12) are installed inside the heat absorption chamber (2) and the heat release chamber (3). The scrapers (12) are penetrated by the heat-conducting pipes (4) and are tightly fitted to them. A slot (13) is provided in the middle part of the intermediate box (5). The scrapers (12) are located near the intermediate box (5). A push rod (14) is provided on one side and inserted into the slot (13). The interior of the intermediate box (5) is provided with a cavity that communicates with the slot (13). A fixed frame (15) is fixedly installed in the cavity. A rotating shaft (16) is rotatably installed on the fixed frame (15). Both ends of the rotating shaft (16) are provided with threaded rods (17) that are inserted into the push rod (14) and threadedly connected to the push rod (14). The middle part of the rotating shaft (16) is provided with a driven bevel gear (19). The output end of the motor (20) is provided with a drive bevel gear (18) that meshes with the driven bevel gear (19). The two threaded rods (17) have a reverse thread structure.

2. The waste heat recovery device with a cleaning structure for a superconducting heat pipe according to claim 1, characterized in that: A cleaning groove (6) is provided below the heat absorption chamber (2) and the heat release chamber (3), and a bottom plate (7) is provided at the lower end of the heat exchange box (1). The bottom plate (7) is fixed to the bottom of the cleaning groove (6) by screws.

3. A waste heat recovery device with a cleaning structure for a superconducting heat pipe according to claim 2, characterized in that: The cross-sections of the slot (13) and the push rod (14) are both rectangular.

4. A waste heat recovery device with a cleaning structure for a superconducting heat pipe according to claim 3, characterized in that: The push rod (14) fits tightly against the inner wall of the slot (13).

5. A waste heat recovery device with a cleaning structure for a superconducting heat pipe according to claim 4, characterized in that: The fixed frame (15) is inlaid with a bearing, and the inner ring of the bearing is penetrated by the rotating shaft (16).

6. A waste heat recovery device with a cleaning structure for a superconducting heat pipe according to claim 5, characterized in that: The output end of the motor (20) is provided with a drive shaft that is inserted into the heat exchange box (1), and the drive bevel gear (18) is fixed at the bottom end of the drive shaft.

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